Compressed coconut coir pith granules and methods for the production and use thereof

Information

  • Patent Grant
  • 8024890
  • Patent Number
    8,024,890
  • Date Filed
    Monday, March 29, 2010
    14 years ago
  • Date Issued
    Tuesday, September 27, 2011
    13 years ago
Abstract
Compressed coconut coir pith granules having unique physical and horticultural characteristics are provided along with methods for producing such compressed products by subjecting coconut coir pith to compaction utilizing a roll compactor and subsequently granulating the compacted material.
Description
FIELD OF THE DISCLOSURE

The present disclosure relates to compressed coconut coir pith granules for use as growth media and to methods for producing such granules or flakes. More particularly, the compressed granules or flakes produced in accordance with the present invention exhibit enhanced size, density, flowability and abrasion resistance characteristics which render the granules highly desirable for use in seeding mulch, potting mix, garden soil and flower and vegetable furrow covering applications.


BACKGROUND OF THE DISCLOSURE

Coconut coir pith is a by-product of the coconut husk fiber processing industry. Coir is the name given to the fibrous material that constitutes the thick mesocarp (middle layer) of the coconut fruit (Cocos nucifera). In processing, the long fibers of coir are extracted from the coconut husk for use in the manufacture of brushes, upholstery stuffing, filters, twine and like products. The short fibers (10 mm or less) and dust (collectively referred to herein as “pith”) traditionally have accumulated in large piles or “dumps” as a waste product resulting from the processing of coconut husks to obtain the industrially valuable long fibers.


It has been recognized that coconut coir pith material provides an excellent growing medium for plants and it has been suggested that coconut coir pith can provide an effective alternative to previously standard growing media such as peat moss. Coconut coir pith is very similar to sphagnum peat moss in appearance, having a light to dark brown color and consisting primarily of particles in the size range of 0.2-2.0 min (75-90%). Unlike sphagnum peat, however, there are no sticks or extraneous matter in the coconut coir pith. Furthermore, sphagnum peat moss has a density of about 7 lbs/cu ft when fluffed (30-50% moisture content) whereas coir pith is much denser (i.e., about 43 lbs/cu ft when compressed at a ratio of 5:1 on volume to volume basis and about 12 lbs/cu ft when fluffed and having a 50-55% moisture content).


Coir pith as an amendment has many benefits for all types of soil. It increases the organic matter content and due to its high lignin to cellulose ratio, it remains in the soil significantly longer than peat. It improves water-holding capacity of sandy soils. The drainage of clay soils is improved with its inclusion due to its air porosity and agglomeration with clay particles. However, the use of compressed coir pith bricks is cumbersome for use by consumers. The entire brick must first be expanded with water for a relatively long period of time. Then, the consumer must physically fluff and mix the coir pith for complete wetting and expansion. Only then can the wet, expanded coir pith be spread on and incorporated into the soil.


As employed herein the term “coconut coir pith” is intended to refer to both the coconut husk pith and the short coir fibers which are known to provide an excellent growing medium and to provide a suitable and sustainable substitute for soilless growing media such as peat moss (sphagnum, sedge, hypnum and the like) for growing plants. Coconut coir pith has many physical and horticultural characteristics that make it an ideal growing medium for plants. Coconut coir pith has a high water holding capacity, ideal porosity, high cation exchange capacity and high stability (slow rate of degradation due to high lignin to cellulose ratio which prevents oxidation).


However, coconuts are typically only grown in tropical and sub tropical regions, while demand for the substrate is in the United States and Europe, which entails significant shipping and handling costs.


Presently, the forms in which coconut coir pith is available for import into the United States and Europe are rather limited. Due to the low bulk density of loose coconut coir pith at moisture contents acceptable for shipping, coconut coir pith has been compressed into discs, bricks, or blocks at a compression ratio typically of about 5:1 to enable economical overseas shipping costs. It has been known that compressed coconut coir pith in this form must be mechanically out-turned or exposed to water for a lengthy period to decompress the coconut coir pith before use as such or for inclusion in a consumer product. This processing step is relatively slow and requires the entire disc, brick, or blocks to be out-turned at once. Also, coconut coir pith that is outturned is either dry and dusty or wet and heavy which contributes to further processing problems. Furthermore, coconut coir pith is not commonly baled in the manner of sphagnum peat because this form is less compressed and, therefore, less economical to ship.


Attempts have been made to compress and form coir pith into pellets using pellet mills or extruders as, for example, disclosed in U.S. Published Patent Application 2004/0025422. Those processes require use of high shear compaction methods which generate high levels of heat through friction. Such high temperature processing alters the physical properties of the coconut coir pith substrate. The pellets produced have been found to exhibit undesirable physical characteristics such as relatively slow expansion after compaction, and the coconut coir pith normally does not expand back to its pre-compacted volume after such compaction.


For example, the use of pellet mills or extruders for compaction of coir into small compressed particles has been suggested heretofore. However, pellet making processes use high pressure to extrude the material through small orifices. Unlike roll compaction, pelletizing is a high shear process that produces significant friction and heat in the material. The friction and heat from this process may produce a coir pith pellet with undesirable physical and horticultural properties. Although comparable compression ratios can be achieved, the expansion ratio after the addition of water, water holding capacity of the material, and the rate of expansion of the granules may be reduced.


Accordingly, it is an object of the present disclosure to provide more convenient forms of coconut coir pith for horticultural use which expand rapidly upon contact with moisture.


It is a further object to provide economically effective production methods for producing compacted granular coconut coir pith products which have the desired physical and horticultural properties necessary for final product application, for example, as growth media.


SUMMARY OF THE DISCLOSURE

Compacted granular coconut coir pith products produced in accordance with the disclosure are highly desirable for use in providing growing media in such applications as seeding mulch, potting mix garden soil, flower and vegetable furrow covering applications and the like. More particularly, the present disclosure is generally directed to methods for producing granular coconut coir pith products by subjecting raw coconut coir pith material to roll compaction under specified operating conditions as opposed to the prior art pellet mill compaction or extrusion processes. Roll compaction of the coconut coir pith is followed by subsequent granulation of the compacted granules to provide plant growth media which expand immediately upon exposure to moisture or water.


The compressed granular coconut coir pith products produced in accordance with the present disclosure may be composed of coconut coir pith only or may contain other horticulturally acceptable media such as fertilizers, micronutrients, pH adjusting agents, wetting agents, biostimulents, microbes and other bioactive materials. The granules produced in accordance with this invention have a bulk density in a range of between about 240 kg/m3 and 600 kg/m3 and expand rapidly when exposed to moisture.


The disclosure provides a method for preparing compressed coir granules that expand readily with exposure to water. The granules are formed by roll compaction and subsequent granulation (milling and screening). This process has been shown to produce compacted coir granules with superior characteristics to coir pellets that are manufactured with a pellet mill or extruder.





BRIEF DESCRIPTION OF THE DRAWING


FIG. 1 is a flow diagram illustrating the processing steps in accordance with the methods of the present disclosure for producing compressed coconut coir pith granules.





DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

Coconut coir pith has a unique microstructure composed of a relatively uniform pore structure. With application of high pressure, the pore structure can be compressed and the resulting compressed coconut coir pith product will expand back to its original volume upon exposure to moisture. However, we have found that it is critical to employ certain operating conditions to achieve compression of the coconut coir pith substrate to avoid excessive heat generation through friction that could denature the desired physical and horticultural characteristics of the material.


The compressed granules (including flakes, particles, pellets and the like) produced in accordance with this invention are formed from a variety of coconut coir pith substrate materials. It should be noted that as employed herein the term “granules” is intended to include of all granular forms and shapes including flakes, particles, pellets and the like. Typically, the substrate materials employed herein comprise mixtures of coir fiber and coir pith (with pith being the more desirable component of the mixture). However, the substrates may comprise other mixtures such as coconut coir pith and up to about 50% (by weight) of a horticulturally acceptable organic or non-organic media such as sphagnum peat, humus peat, sedge peat, bark fines, rice hulls and mixtures thereof or, in addition, any other material familiar to those skilled in horticulture.


The compressed granules formed in accordance with the present disclosure, may be randomly shaped and angular in surface appearance and may contain pieces of coir fiber. The compressed flakes may contain additives such as fertilizers, micronutrients, pH adjusting agents such as lime, and/or various wetting agents including horticulturally acceptable surfactants and other additives designed to enhance or protect the germination, development, and/or growth of seeds and plants implanted in a growth media formed from the compressed products. The additives also may be used to improve the physical and horticultural characteristics of the granules. The additives alternatively may comprise pesticides or herbicides.


Typically, the concentration of the additives in the compressed products should not exceed about 10% of the total weight of the product, but could comprise up to about 50% (by weight) of the flake.


In a preferred embodiment, the compressed coconut coir pith granules are formed by roll compaction and subsequent granulation as described in further detail below. Preconditioning of the coconut coir pith is an optional step with the major purpose of reducing the length of the coir fibers present in the coir pith whereby efficiency of compaction and subsequent granulation is increased. Most preferably, the coir pith contains less than about 10% by weight of coir fiber, but could contain up to about 50% by weight of coir fiber.


The compressed flakes formed by employing the methods of the present invention are useful for various horticultural applications when they are sized greater than about 32 mesh (US sieve size) and pass through about a 1½ inch screen. The particle size distribution may be adjusted within this range to accommodate specific product application requirements by changing the process conditions of the post-compaction granulation milling and screening loop.


The moisture content of loose coir pith in the coconut coir pith substrate may be less than about 25% water by weight for compaction of the substrate. Preferably, the range of moisture content should be between about 8 and about 15% water (by weight). The compaction itself may not significantly affect the moisture content of the coir pith; however, if desired, steps can be taken to adjust the moisture content during any preconditioning and/or blending stages prior to compaction.


Depending on the intended application of the compressed coconut coir pith produced by employing the methods of the present disclosure, the granules produced thereby should have sufficient physical integrity and abrasion or attrition resistance to satisfy the requirements of the intended use.


In order to quantify the abrasion or attrition resistance of compressed granules and the ability of the compressed granular products to withstand mechanical processing the following procedure may be employed wherein a limit screen size that retains 90% of a granular material is determined by particle size analysis prior to testing. Then, granular test samples are placed on the limit screen with stainless steel balls of a specific size. The screen may be placed in a RoTap®-style Sieve Shaker for a specified amount of time. The abrasion resistance may be expressed as a percent of material remaining on the limit screen. The abrasion resistance should be sufficient to maintain integrity throughout additional processing, typically blending with other components, and final consumer or professional packaging.


A distinction of the compressed coir pith granules produced by employing the methods of the present invention as compared with extrusion of compressed coir pith disks, bricks, and blocks, is that the extrusion method products are slow to expand when exposed to moisture whereas the roll compacted compressed granules (including flakes, particles, pellets and the like) produced in accordance with the present disclosure have been found to expand within seconds of exposure to moisture.


For example, a compressed single granule of this invention which is dropped in sufficient water to expand it fully may typically be substantially completely expanded within about 15 seconds. This quick expansion can be attributed to the method of compaction and the high surface to volume ratio of the products produced. Specifically, granules of less than ¼″ in diameter may be completely expanded within less than about 10 seconds while larger granules may require longer periods to fully expand than the smaller granules or flakes. The expanded granules may de-granulate or fall apart into smaller pieces readily after being submerged in water.


Bulk compressed granules of the present disclosure may have an apparent expansion ratio when exposed to moisture of between about 2:1 and about 5:1, with expansion ratios of about 3.5:1 and about 4:1 being typical for compressed granules containing 100% coir pith. Expansion ratios are measured by taking a known volume of compressed coir pith granules and mixing by hand while adding the minimum amount of water to expand the coir pith until no palpable granules remain. The volume of the expanded material is then compared to the original compressed material. Inclusion of high percentages of other growing media such as sphagnum peat or bark fines in the granular composition may result in lower expansion ratios.


The expanded coir particles formed from the compressed granules of this invention may have a high water holding capacity of up to about 8 times their weight. The compressed granules produced may have a bulk density that ranges from about 240 kg/m3 to about 600 kg/m3.


In accordance with the present disclosure, the compressed coir pith granules can, for example, be blended with grass or other seeds or plant propagules and optionally nutrients and other commonly known horticulturally acceptable ingredients to produce a seeding mulch or a bare spot repair product for use in treating lawns and other areas requiring soil amendment or plant establishment. Fertilizer, pH adjustment agents such as lime, micronutrients, wetting agents (horticulturally acceptable surfactants), and other plant or biological growth enhancers may be included in the granules or the product mix. The resulting product mix may be a physical blend of compressed coir pith granules, seed or other plant propagules, and other additives (fertilizer, micronutrients, lime for pH adjustment, and other horticulturally acceptable ingredients). In addition, granules of acceptable size may be matched with other horticultural, agricultural, or garden seeds or plant propagules to enhance germination and establishment of lawns, gardens or other areas to be amended or vegetated.


The granules can range in size from less than about 1½″ to greater than about 32 mesh. The size of the granules can be adjusted based on application. For example, inclusion of the granules as mulch in a combination grass seed, fertilizer, and mulch product, the granule sizes would preferably be in the range of about less than about 4 mesh and to greater than about 18 mesh which would be relatively similar to the size of the seeds. The free flowing nature of the granules allows the user to sprinkle the product on a bare spot in a lawn with minimal effort. Once water contacts the granules either through overhead irrigation, rain, or moisture in the soil, the compressed granules expand and may help protect the seed from desiccation. Due to its high moisture holding capacity, the expanded coir pith may function as seed mulch that holds moisture near the seeds necessary for germination, early establishment, and healthy growth.


The coir pith's high water holding capacity may also help trap moisture in the root zone of the seedling by reducing evaporation from the soil. The nutrients in the product mix may be released directly into the soil and are less likely be adsorbed or tied up in the mulch layer. These unique properties enable the germinating grass to establish its roots directly in the soil and less so into the mulch, increasing the survival rate of seedlings introduced therein as compared to other known products. Results with trials using the products of the present invention have shown strong improvements over bare seed and currently available seeding mulches.


Coir pith in its raw form may not contain all the necessary nutrients for healthy plant growth. By including fertilizers and appropriate nutrients in the compaction process herein, a suitable potting mix may be made. The fertilizer chosen could be a slow release type fertilizer to provide plant nutrition for an extended period of time. Additions (fertilizers, lime for pH control, micronutrients, surfactants and biologically active ingredients) made prior to compaction of the coconut coir pith may result in production of homogeneous granules. The granules could range in size from less than about 1½″ to greater than about 18 mesh (US Sieve Series), however they would preferably be less than about ½″ to greater than about 6 mesh. The resulting products may have improved water-holding capacity over existing potting soils based on the natural properties of coir pith. Due to the high water-holding capacity, favorable air porosity, and correct nutrient additions, this product could result in improved results for consumers over ordinary potting soil. The compressed potting soil may be free flowing and may be easily poured from the package into a pot or container. When watered, the potting soil may rapidly expand to fill the container.


By using coir pith in the form of compressed granules produced in accordance with the methods of the present disclosure, the consumer would need to simply incorporate the granules into the soil. When the granules contact water, either through irrigation, rain, or available soil moisture, they may expand and improve the soil structure, water holding capacity, cation exchange capacity and other soil properties, such as tilth, depending on the nature of the soil being amended. The granules could range in size from less than about 1½″ to greater than about 18 mesh, preferably, less than about ¾″ to greater than about 6 mesh.


Additionally, the products of the present invention may be used as garden amendments such as for several vegetable species (radish, carrot, lettuce, etc.) which lend themselves to planting in a row or furrow followed by coverage of the seed with soil. Seedlings may be thinned over time. In this regard, it should be noted that by mixing the seed with an appropriate coir granule size fraction that matches the vegetable seed size, the seed and expandable soil mix can be effectively poured into the furrow or even onto the soil surface. Watering would then expand the coir and as a result the seed would be buried under a protective mulch cover that facilitates germination. Similar results could be obtained with flower seed.


Thus, it should be noted that the compressed coir pith granules of the present disclosure can be used more effectively and efficiently than previously known products in a variety of commercially and horticulturally significant applications including, for example, expandable potting mixes; garden soil amendments and flower and/or vegetable furrow coverings and the like.


A process in accordance with the present invention is provided in the flow diagram 100 shown in FIG. 1. It should be noted that the preconditioning step 103 illustrated in the flow diagram is optional but may increase the efficiency of converting the compacted substrate into granules. In this preconditioning step 103, loose coir pith may be treated using an air swept mill (such as a “Pulvicron” manufactured by Bepex, Minneapolis, Minn. or other similar mills known to those skilled in the art) to reduce the length of any fibers. The raw material to be preconditioned may be conveyed through the mill by an air stream; therefore, the moisture content of the coir can be reduced by controlling the humidity and temperature of the air stream.


The preconditioned coir pith which may be blended with additive materials may then be subjected to compaction into a large ribbon by means of a roll compactor, shown in step 105. The roll compactor applies pressure to the material in the range of about 1500 to about 2500 psi, preferably, about 1800 psi to about 2200 psi. The roll compactor may form the material into a semi-continuous ribbon or sheet. The compacted ribbon may be broken into granules or flakes, typically less than about 2″ in diameter with a mixture of smaller pieces, by a flake-breaker or other means to improve the ability to convey the material to the milling and screening loop. Then, the granules or flakes may be fed through a conventional milling and screening loop, shown in step 107, for granulation to a desired size range.


Once in the milling and screening loop, shown in step 107, the screen may separate the pieces into three streams: oversized pieces, on-size granules, and undersized fines. The oversized material may be recycled in the milling and screening loop, step 107, until it is reduced in size, and the fines are returned to the feed of the compactor of step 105. The desired size distribution of the compressed granules can be controlled by process changes in the milling and screening loop. The compressed granules preferably have a bulk density of between about 400 kg/m3 and 500 kg/m3, but could be anywhere in the range of 240 kg/m3 and 600 kg/m3, but more ideally in the range of 300 kg/m3 and 500 kg/m3. When exposed to water, the granules may quickly expand to about 3 to 4 times their compressed volume.


The density of the granules produced in accordance with the methods of the present disclosure and their free flowing physical properties may enable optimization of the filling of shipping containers resulting in economic savings compared to compressed disks, bricks and blocks. Furthermore, such compressed disks, bricks and blocks are typically stacked on pallets for shipment in cargo containers whereas the compressed granular products produced in accordance with the present invention can be bulk filled into containers to be dumped on arrival at their destination resulting in considerable cost and efficiency savings such as the cost of pallets.


Example 1

Coir pith bricks of Sri Lankan origin were obtained from Haymark (Spring, Tex.). The bricks were out turned using a pin mill and screened through ⅜″ screen. The loose coir had a moisture content of between 10 and 17% by weight. A horticulturally acceptable surfactant was obtained from BASF, Pluronic L-62 is the name of the proprietary non-ionic surfactant. The coir was blended with 1% by weigh solution of a 1:1 mixture of surfactant and water. The surfactant treated coir was then fed into a Chilsonator Model 1.5L×8D Roll Compactor manufactured by Fitzpatrick Co. The roll pressure (oil pressure) was operated at between 1200 and 1800 psi. The feed screw was turning at 70 rpms. The coir left the compactor as a mixture of fines and semi-continuous ribbons. The compacts were collected and screened using a Sweco vibratory screener to +¼″. The fines were recycled back to the compactor. After about 20 lbs of compacts larger than ¼″ were collected, the material was milled in a Fitzmill (Fitzpatrick Co.) with knives installed and a ¼″ perforated plate for classification. After milling the granules were screened to −¼″, +30 mesh. A sample of the granules was then expanded by adding water and mixing by hand until no palpable granules remained. The expansion volume ratio was measured to be 3.25:1 versus the original compressed granules.


Example 2

Coir pith bricks of Sri Lankan origin were obtained from Haymark (Spring, Tex.). The coir bricks were outturned using an Extructor Model RE-12 manufactured by Bepex (Minneapolis, Minn.). The coir was then milled using a Pulvicron, PC-20 (Bepex) in order to reduce the length of fibers present with the pith. The pulvicron is an air-swept mill with and internal classifier. Use of this mill is effective at reducing the fiber length and adjusting the moisture content of the coir pith by controlling the temperature and/or humidity of the air stream. Moisture content of the coir pith was typically between 10% and 15% by weight after milling. The pith was then batch blended in a ribbon blender with pulverized dolomite lime to adjust pH and 15-15-15 fertilizer (containing ammonium nitrate, ammonium sulfate, diammonium phosphate, and potassium chloride). The blended coir was compacted into ribbons using a Model MS-75 Compactor (Bepex) with a medium compression feed screw and flat (smooth surfaced) rolls. The roll pressure was set at 2300 psi and 6 rpm, and the feed screw was running at 35 rpm. The result was a semi-continuous ribbon of compressed coir pith. The ribbon was fed into a Jacobsen Crusher (Carter Day, Minneapolis, Minn.) with a 1″ square grate which reduced the ribbon into smaller pieces to enable conveying via screw conveyors and bucket elevators. The compacted coir pieces were then conveyed to a milling and screening loop consisting of a 60″ Sweco Screener and a Bepex Disintegrator RD-8 as a granulation mill. The screener separated the compacted coir into three streams; oversized pieces, on-size granules, and fines. The oversized pieces were sent to the granulation mill and subsequently returned to the screen. The fines were returned to the compactor, and the on size material was collected. In this example the on-size material was −6 mesh, +12 mesh with a loose bulk density of 370 kg/m3 (23 lbs/ft3). The expansion ratio of the compacted material after wetting and fluffing by hand was 3.75:1.


Typical ranges of process conditions for the compaction and granulation for the equipment in Example 2 are listed below. The ranges listed below are not the only conditions under which compressed coir pith granules with useful properties can be produced, and are exemplary only.
















Description of Process Condition
Range









Pulvocron Mill RPM
2500 to 5500



Pulvocron Classifier RPM
0 to 1830



Compactor Feed Screw RPM
17 to 100



Compactor Roll RPM
5 to 15



Roll Pressure PSI
1600 to 2400



Screen Size
−1½″ to +12 mesh










The table below provides a comparison of expansion ratios and expansion times for coir pith pellets formed from a pellet mill, and coir granules formed from a roll compactor:












Example of Expansion Results
















water






Time
holding
Physical



Production
Expansion
allowed for
(g H2O/
result of


Description
Method
ratio
expansion
g coir)
expansion
















⅜″ Coir
California
1.75:1
10
minutes
2
still


pellets
Pellet Mill




contains








palpable








pieces


− 5/16″, +6
Roll
 3.5:1
<1
minute
8.5
fully


mesh Coir
compactor




expanded


Granules









Although the invention has been described in its preferred forms with a certain degree of particularity, it is to be understood that the present disclosure has been made by way of example only. Numerous changes in the details of the compositions and ingredients therein as well as the methods of preparation and use will be apparent without departing from the spirit and scope of the disclosure, as defined in the appended claims.

Claims
  • 1. A composition produced by a method comprising: a. subjecting a substrate material consisting of coconut coir pith to roll compaction; andb. granulating the roll compacted material to form a granulated composition;wherein the granulated composition retains a final moisture content of about 8% to about 17%.
  • 2. The composition of claim 1, wherein the coconut coir pith substrate material comprises a mixture of coir pith and coir fiber.
  • 3. The composition of claim 1, wherein the granulated composition is randomly shaped and angular in surface appearance.
  • 4. The composition of claim 1, wherein the granulated composition is sized greater than about 32 mesh (US sieve size) and passes through about a 1½ inch screen.
  • 5. The composition of claim 1, wherein the granulated composition has enhanced physical integrity and abrasion resistance.
  • 6. The composition of claim 1, wherein the granulated composition completely expands within about 15 seconds after exposure to moisture.
  • 7. The composition of claim 6, wherein the granulated composition has an apparent expansion ratio of between about 2:1 and about 5:1 when exposed to moisture.
  • 8. The composition of claim 6, wherein the granulated composition has a water holding capacity of 6 times its weight.
  • 9. The composition of claim 1, wherein the granulated composition is free flowing and have a bulk density in a range of from about 200 kg/m3 to about 600 kg/m3.
  • 10. The composition of claim 1, wherein the substrate material is subjected to compaction in a roll compactor at a pressure in the range of about 1500 to about 2500 psi.
  • 11. The composition of claim 1, wherein the method further comprises d. recycling oversized or undersized granulated compositions.
  • 12. The composition of claim 1, wherein the substrate material is subject to a preconditioning step of reducing the length of coir fibers before said roll compaction.
  • 13. A composition produced by a method comprising: a. subjecting a substrate material consisting of coconut coir pith to roll compaction; andb. granulating the roll compacted material to form a granulated composition;wherein the granulated composition completely expands within about 15 seconds after exposure to moisture.
  • 14. The composition of claim 13, wherein the substrate material comprises a mixture of coir pith and coir fiber.
  • 15. The composition of claim 13, wherein the granulated composition is randomly shaped and angular in surface appearance.
  • 16. The composition of claim 13, wherein the granulated composition is sized greater than about 32 mesh (US sieve size) and passes through about a 1½ inch screen.
  • 17. The composition of claim 13, wherein the granulated composition has enhanced physical integrity and abrasion resistance.
  • 18. The composition of claim 13, wherein the method further comprises d. recycling oversized or undersized granulated compositions.
  • 19. The composition of claim 18, wherein the granulated composition has an apparent expansion ratio of between about 2:1 and about 5:1 when exposed to moisture.
  • 20. The composition of claim 18, wherein granulated composition has a water holding capacity of 6 times its weight.
  • 21. The composition of claim 13, wherein the granulated composition is free flowing and have a bulk density in a range of from about 200 kg/m3 to about 600 kg/m3.
  • 22. The composition of claim 13, wherein the granulated composition is subjected to compaction in a roll compactor at a pressure in the range of about 1500 to about 2500 psi.
  • 23. The composition of claim 13, wherein the substrate material is subject to a preconditioning step of reducing the length of coir fibers before said roll compaction.
  • 24. A method for preparing compressed coconut coir pith granules comprising: a. subjecting a substrate material consisting of coconut coir pith to roll compaction; andb. granulating the roll compacted material to form the granulated compositions;wherein the composition retains a final moisture content of about 8% to about 17%.
  • 25. The method of claim 24, wherein the substrate material comprises a mixture of coir pith and coir fiber.
  • 26. The method of claim 24, wherein the granulated compositions is randomly shaped and angular in surface appearance.
  • 27. The method of claim 24, wherein the granulated compositions is sized greater than about 32 mesh (US sieve size) and passes through about a 1½ inch screen.
  • 28. The method of claim 24, wherein the granulated compositions has enhanced physical integrity and abrasion resistance.
  • 29. The method of claim 24, wherein the granulated compositions completely expand within about 15 seconds after exposure to moisture.
  • 30. The method of claim 29, wherein the granulated compositions have an apparent expansion ratio of between about 2:1 and about 5:1 when exposed to moisture.
  • 31. The method of claim 29, wherein the granulated compositions have a water holding capacity of 6 times its weight.
  • 32. The method of claim 24, wherein the granulated compositions is free flowing and have a bulk density in a range of from about 200 kg/m3 to about 600 kg/m3.
  • 33. The method of claim 24, wherein the granulated compositions is subjected to compaction in a roll compactor at a pressure in the range of about 1500 to about 2500 psi.
  • 34. The method of claim 24, further comprises d. recycling oversized or undersized granulated compositions.
  • 35. The method of claim 24, wherein the substrate material is subject to a preconditioning step of reducing the length of coir fibers before said roll compaction.
  • 36. A compressed and granulated composition comprising a substrate material consisting of 100% coir pith; wherein the final moisture content of said composition is about 8% to about 17%; and further wherein the composition is capable of completely expanding in 15 seconds upon contact with water.
  • 37. A method of providing a garden amendment or lawn bare spot repair, said method comprising the steps of: a. incorporating into soil, pouring onto a soil surface, or sprinkling on a lawn bare spot a composition produced by a method comprising (i) subjecting a substrate material consisting of coconut coir pith to roll compaction; and (ii) granulating the roll compacted material to form a granulated composition, wherein the composition retains a final moisture content of about 8% to about 17%;b. adding water to the composition; andc. completely expanding the composition within 15 seconds of adding said water.
  • 38. A method of providing a garden amendment or lawn bare spot repair, said method comprising the steps of: a. incorporating into soil, pouring onto a soil surface, or sprinkling on a lawn bare spot the composition of claim 36;b. adding water to the composition; andc. completely expanding the composition within 15 seconds of adding said water.
  • 39. A compressed and granulated composition comprising a substrate material consisting of 100% coir pith; wherein the final moisture content of said composition is about 8% to about 17%.
  • 40. A compressed and granulated composition comprising a substrate material consisting of 100% coir pith; wherein the composition is capable of completely expanding in 15 seconds upon contact with water.
CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims priority to and incorporates by reference in its entirety U.S. Provisional Patent Application No. 61/000,818 entitled “Compressed Coconut Coir Pith Granules and Methods for the Production and Use Thereof” to Marcus Bertin, et al. filed Oct. 29, 2007.

US Referenced Citations (274)
Number Name Date Kind
507144 Lundell Oct 1893 A
605640 Houghton et al. Jun 1898 A
940631 Aylsworth Nov 1909 A
1105047 Thomson Jul 1914 A
1827051 Thomas Mar 1928 A
1790111 Pike Jan 1931 A
2450830 Helberg et al. Oct 1948 A
2508414 Meyer May 1950 A
2664404 Blatz et al. Dec 1953 A
2917379 Ryker Dec 1959 A
2971292 Malecki Feb 1961 A
2998550 Collins et al. Aug 1961 A
3284209 Kelley Nov 1966 A
3375607 Melvold Apr 1968 A
3396810 Andrews Aug 1968 A
3502458 Schenk Mar 1970 A
3524279 Adams Aug 1970 A
3590937 Andrews Jul 1971 A
3615809 Nagle et al. Oct 1971 A
3653459 Andrews Apr 1972 A
3656930 Martin Apr 1972 A
3669204 Andrews Jun 1972 A
3703464 Ferm Nov 1972 A
3809175 Andrews May 1974 A
3842537 Bishop Oct 1974 A
3960722 Tomikawa et al. Jun 1976 A
3973355 McKenzie Aug 1976 A
4063919 Grano, Jr. Dec 1977 A
4072794 Tomita et al. Feb 1978 A
4098398 Myers Jul 1978 A
4123518 Behrenz et al. Oct 1978 A
4172039 Akiyama Oct 1979 A
4174957 Webb et al. Nov 1979 A
4185987 Tilkanen Jan 1980 A
4258659 Rowell Mar 1981 A
4277345 Heitkamp et al. Jul 1981 A
4318248 Muldner Mar 1982 A
4341180 Cortigene et al. Jul 1982 A
4473390 Teufel Sep 1984 A
4537877 Ericsson Aug 1985 A
4551165 Warner Nov 1985 A
4570573 Lohman Feb 1986 A
4570578 Peschka et al. Feb 1986 A
4579578 Cooke Apr 1986 A
4591635 Greve et al. May 1986 A
4627382 Muzzey Dec 1986 A
4643811 Langlois Feb 1987 A
4643814 Goldstein Feb 1987 A
4675388 Greve Jun 1987 A
4705248 McIntyre Nov 1987 A
4721059 Lowe et al. Jan 1988 A
4723510 Skillestad Feb 1988 A
4734393 Lowe et al. Mar 1988 A
4738286 McIntyre Apr 1988 A
4762155 Gruber Aug 1988 A
4786308 Colling Nov 1988 A
4875537 Garnatz et al. Oct 1989 A
4895250 Schifrin Jan 1990 A
4921831 Nakai et al. May 1990 A
4925343 Raible et al. May 1990 A
5037690 Van der Kooy Aug 1991 A
5060598 Richards Oct 1991 A
5074379 Batrice Dec 1991 A
5092457 Islava et al. Mar 1992 A
5106648 Williams Apr 1992 A
5180033 Wilson Jan 1993 A
5195465 Webb et al. Mar 1993 A
5215407 Brelsford Jun 1993 A
5218783 Langezaal et al. Jun 1993 A
5300127 Williams Apr 1994 A
5307577 Werling May 1994 A
5337416 Ryan et al. Aug 1994 A
5337496 Glorioso Aug 1994 A
5338131 Bestmann Aug 1994 A
5340642 Baumgartl et al. Aug 1994 A
5404209 Matsuoka et al. Apr 1995 A
5419945 Lopez May 1995 A
5422330 Kaylor Jun 1995 A
5424404 Ruske et al. Jun 1995 A
5425597 Bestmann Jun 1995 A
5458662 Teyone Oct 1995 A
5496378 Hengelsberg et al. Mar 1996 A
5516486 Wright May 1996 A
5587277 Yamashita et al. Dec 1996 A
5630377 Kumlin May 1997 A
5658571 Gopalan et al. Aug 1997 A
5678954 Bestmann Oct 1997 A
5710190 Jane et al. Jan 1998 A
5716840 Kahler et al. Feb 1998 A
5727499 Armington et al. Mar 1998 A
5728790 Seki et al. Mar 1998 A
5747549 Tsurugai et al. May 1998 A
5750661 Schloesser et al. May 1998 A
5750742 Schroder et al. May 1998 A
5772721 Kazemzadeh Jun 1998 A
5839674 Ellis Nov 1998 A
5840632 Miller Nov 1998 A
5843203 Lindsay et al. Dec 1998 A
5860391 Maxwell Jan 1999 A
5883025 Karstens Mar 1999 A
5922189 Santos Jul 1999 A
5927049 Simard Jul 1999 A
5942457 Santos Aug 1999 A
5976210 Sensibaugh Nov 1999 A
6019063 Haubensak et al. Feb 2000 A
6027652 Hondroulis et al. Feb 2000 A
6032409 Obonai Mar 2000 A
6036971 Kimoto et al. Mar 2000 A
6041546 Baranova Mar 2000 A
6048968 Etzbach et al. Apr 2000 A
6053125 Kory et al. Apr 2000 A
6071487 Campion et al. Jun 2000 A
6076299 Spittle et al. Jun 2000 A
6083621 Sugimoto Jul 2000 A
6085806 Davis et al. Jul 2000 A
6107242 Ackerman et al. Aug 2000 A
6189260 Kusey et al. Feb 2001 B1
6197081 Schmidt Mar 2001 B1
6218321 Lorcks et al. Apr 2001 B1
6219968 Belger et al. Apr 2001 B1
6271190 Boskamp et al. Aug 2001 B1
6286626 Evans Sep 2001 B1
6322734 Zanten et al. Nov 2001 B1
6357176 Baldwin et al. Mar 2002 B2
6360478 Spittle Mar 2002 B1
6391120 Silva May 2002 B1
6395166 Haydock May 2002 B1
6403134 Nayyar et al. Jun 2002 B1
6408568 Kusey et al. Jun 2002 B1
6444467 Fan et al. Sep 2002 B1
6455149 Hagen et al. Sep 2002 B1
6472588 Haigler et al. Oct 2002 B1
6479433 Hann et al. Nov 2002 B1
6491840 Frankenbach et al. Dec 2002 B1
6495058 Frankenbach et al. Dec 2002 B1
6508306 Reddy et al. Jan 2003 B1
6517600 Dinel Feb 2003 B1
6539882 Layt et al. Apr 2003 B2
6547493 Spangler et al. Apr 2003 B2
6596324 Homan Jul 2003 B1
6609331 Stamp Aug 2003 B1
6620507 Kadowaki et al. Sep 2003 B2
6645392 Frankenbach et al. Nov 2003 B2
6652766 Frankenbach et al. Nov 2003 B1
6689609 Fan et al. Feb 2004 B1
6695544 Knudson et al. Feb 2004 B2
6696284 Haridas et al. Feb 2004 B2
6709202 Spangler et al. Mar 2004 B2
6711850 Yelanich et al. Mar 2004 B2
6732666 Layt May 2004 B2
6773594 Van der Wijngaart Aug 2004 B1
6790819 Trinh et al. Sep 2004 B2
6851221 Layt et al. Feb 2005 B2
6861131 Evans Mar 2005 B2
6863027 Silva Mar 2005 B1
6863816 Austin et al. Mar 2005 B2
6881338 Austin et al. Apr 2005 B2
6893193 Santha May 2005 B2
6896805 Austin May 2005 B2
6903197 Tresch et al. Jun 2005 B2
6910835 Spangler et al. Jun 2005 B2
6913423 Spangler et al. Jul 2005 B2
6933371 Schroder et al. Aug 2005 B2
6946295 Polonenko et al. Sep 2005 B2
7005410 Trinh et al. Feb 2006 B2
7141659 Lynch et al. Feb 2006 B2
7012053 Barnabas et al. Mar 2006 B1
7029586 Austin et al. Apr 2006 B2
7036272 Stoever May 2006 B2
7087169 Austin Aug 2006 B2
7091400 Haigler et al. Aug 2006 B2
7098324 Haigler et al. Aug 2006 B2
7109015 Liao Sep 2006 B2
7117634 Pelton Oct 2006 B2
7119166 Lin Oct 2006 B2
7165358 Wright Jan 2007 B2
7485171 Lynch et al. Feb 2009 B2
7587856 Rubin et al. Sep 2009 B2
7607258 Holmenlund Oct 2009 B2
20010013198 Krysiak et al. Aug 2001 A1
20010053545 Engwar Dec 2001 A1
20020007592 Mischo Jan 2002 A1
20020011024 Baldwin et al. Jan 2002 A1
20020062770 Layt May 2002 A1
20020073616 Pelton Jun 2002 A1
20020112293 Trinh et al. Aug 2002 A1
20020129545 Morris Sep 2002 A1
20020131826 Spangler Sep 2002 A1
20020131827 Spangler Sep 2002 A1
20020194649 Fan et al. Dec 2002 A1
20030031511 Tyler Feb 2003 A1
20030061639 Polonenko et al. Mar 2003 A1
20030070191 Haigler et al. Apr 2003 A1
20030086764 Knudson et al. May 2003 A1
20030089152 Yelanich et al. May 2003 A1
20030106097 Haigler et al. Jun 2003 A1
20030140553 Moore Jul 2003 A1
20030146164 Robson Aug 2003 A1
20030146405 Frankenbach et al. Aug 2003 A1
20030157668 Polonenko et al. Aug 2003 A1
20030172699 Phinney Sep 2003 A1
20030183140 Layt Oct 2003 A1
20030209686 Frankenbach et al. Nov 2003 A1
20030230529 Austin et al. Dec 2003 A1
20040000517 Austin et al. Jan 2004 A1
20040005198 Spangler et al. Jan 2004 A1
20040025422 Macquoid et al. Feb 2004 A1
20040040209 Layt et al. Mar 2004 A1
20040049808 Haigler et al. Mar 2004 A1
20040049980 Principe Mar 2004 A1
20040065005 Morris Apr 2004 A1
20040098270 Obayashi et al. May 2004 A1
20040111967 Raap et al. Jun 2004 A1
20040141816 Spangler et al. Jul 2004 A1
20040156687 Knudson et al. Aug 2004 A1
20040209991 Piret et al. Oct 2004 A1
20040211721 Stamets Oct 2004 A1
20040216374 Davids Nov 2004 A1
20040221397 Trinh et al. Nov 2004 A1
20040228692 McCamy Nov 2004 A1
20040237387 McCamy Dec 2004 A1
20040237388 Moore Dec 2004 A1
20050034367 Morrow Feb 2005 A1
20050060811 Smith et al. Mar 2005 A1
20050061045 Lynch et al. Mar 2005 A1
20050076564 Castleberry Apr 2005 A1
20050082222 Austin Apr 2005 A1
20050098759 Frankenbach et al. May 2005 A1
20050102895 Bissonnette et al. May 2005 A1
20050124065 Fan Jun 2005 A1
20050141966 Greene Jun 2005 A1
20050161407 McPhillips Jul 2005 A1
20050176583 Stamets Aug 2005 A1
20050183331 Kania Aug 2005 A1
20050204620 Butterfield et al. Sep 2005 A1
20050218071 Austin et al. Oct 2005 A1
20050235558 Carrillo Oct 2005 A1
20050236315 McPhillips Oct 2005 A1
20050241231 Bissonnette et al. Nov 2005 A1
20050246954 Bissonnette et al. Nov 2005 A1
20050246955 Bissonnette et al. Nov 2005 A1
20050254899 Tyler Nov 2005 A1
20050257424 Bissonnette et al. Nov 2005 A1
20050269260 Austin Dec 2005 A1
20050274074 Stamp Dec 2005 A1
20060032804 McPhillips Feb 2006 A1
20060070294 Spittle Apr 2006 A1
20060088935 Fan et al. Apr 2006 A1
20060101881 Carin et al. May 2006 A1
20060107589 Rubin May 2006 A1
20060112629 Wright Jun 2006 A1
20060160907 Stamp Jul 2006 A1
20060168881 Straumietis Aug 2006 A1
20060174379 Haigler et al. Aug 2006 A1
20060179711 Bissonnette et al. Aug 2006 A1
20060185235 Bono Aug 2006 A1
20060207170 Smith Sep 2006 A1
20060237363 Austin et al. Oct 2006 A1
20060248796 Hashimoto et al. Nov 2006 A1
20070022661 Slater Feb 2007 A1
20070094928 Hunter May 2007 A1
20070209277 Schuck et al. Sep 2007 A1
20080039605 Qiu Feb 2008 A1
20080155897 Van de Wetering Jul 2008 A1
20080202024 Spittle et al. Aug 2008 A1
20080216404 Jarvis Sep 2008 A1
20080236037 Rose Oct 2008 A1
20080280760 Oliver Nov 2008 A1
20080287295 Rubin Nov 2008 A1
20090019765 Kosinski Jan 2009 A1
20090113791 Bertin et al. May 2009 A1
20090139927 Kania et al. Jun 2009 A1
20090200241 Harman et al. Aug 2009 A1
20090253576 Ikin Oct 2009 A1
Foreign Referenced Citations (54)
Number Date Country
1328744 Apr 1994 CA
1145193 Mar 1963 DE
10063017 Jul 2002 DE
102004038299 Mar 2006 DE
0487655 Jun 1992 EP
512272 Nov 1992 EP
0640280 Mar 1995 EP
736494 Oct 1996 EP
0786496 Jul 1997 EP
849243 Jun 1998 EP
0867112 Sep 1998 EP
849243 Dec 1998 EP
0962129 Mar 2003 EP
1625785 Feb 2006 EP
393783 Jun 1933 GB
1491940 Nov 1977 GB
2137609 Nov 1984 GB
2272903 Jun 1994 GB
2308538 Jul 1997 GB
2332353 Jun 1999 GB
10042689 Feb 1998 JP
11056017 Mar 1999 JP
2002238347 Aug 2002 JP
960013590 Oct 1996 KR
20020002030 Jan 2002 KR
20020068556 Aug 2002 KR
20020085189 Nov 2002 KR
20020092752 Dec 2002 KR
20030052374 Jun 2003 KR
20030052375 Jun 2003 KR
20040062497 Jul 2004 KR
20040067336 Jul 2004 KR
PA02004768 Dec 2004 MX
9401955 Jul 1996 NL
WO 9103149 Mar 1991 WO
WO 9412576 Jun 1994 WO
WO 9412576 Jun 1994 WO
WO 9612687 May 1996 WO
WO 9907943 Feb 1999 WO
WO 0113706 Mar 2001 WO
WO 0157156 Aug 2001 WO
WO 0202889 Jan 2002 WO
WO 03037069 May 2003 WO
WO 2004037748 May 2004 WO
WO 2004078892 Sep 2004 WO
WO 2004098270 Nov 2004 WO
WO 2005070852 Aug 2005 WO
WO 2005095337 Oct 2005 WO
WO 2006025657 Mar 2006 WO
WO 2007009249 Jan 2007 WO
WO 2008025027 Feb 2008 WO
WO 2008048778 Apr 2008 WO
WO 2008114953 Sep 2008 WO
WO 2009009805 Jan 2009 WO
Related Publications (1)
Number Date Country
20100180501 A1 Jul 2010 US
Provisional Applications (1)
Number Date Country
61000818 Oct 2007 US
Continuations (1)
Number Date Country
Parent 12260605 Oct 2008 US
Child 12749222 US