Embodiments of the present invention generally relate to gloves and, more particularly, to supported gloves having an elastomeric, polymeric, or latex coating, liquid proof structure and impact protection features disposed thereon, and a method of making the gloves.
Gloves are utilized in many fields for protecting workers, such as medical, industrial, household, and others. In service, gloves are subjected to extensive wear from cuts, punctures, and abrasions, creating a need for durability. Furthermore, other in-service requirements include enhanced impact resistance, grip-ability, and flexibility. Many gloves comprise fabrics and/or leathers as well as fabric/leather patches, which are bulky and expensive.
Supported gloves consist of a fabric liner that is dipped into a rubber polymer, e.g., natural rubber latex, synthetic rubber latex, and the like, forming a coating that covers at least a portion of the fabric liner. However, such gloves may not offer adequate strength in regions that may experience stress or impact. Further, such gloves may be required to maintain a high amount of dexterity for the wearer, and may also need to be impermeable to liquids, or liquid proof.
Therefore, there is a need in the art for a supported glove having impact protection in specific regions of the glove, while providing enhanced grip and being liquid proof in desired regions of the glove, and a method of producing such a glove.
Gloves comprising polymeric coating(s) disposed on a fabric liner, impact protection elements disposed on a part(s) of the polymeric coating(s) or part(s) of the fabric liner, liquid proof layer to prevent liquid permeability across the gloves, and method of making the gloves, in accordance with the present invention, substantially as shown in and/or described in connection with at least one of the figures, as set forth more completely in the claims, are disclosed. Various advantages, aspects, and novel features of the present disclosure, as well as details of an exemplary embodiment thereof, will be more fully understood from the following description and drawings.
The foregoing summary is not intended, and should not be contemplated, to describe each embodiment or every implementation described in the disclosure. Other and further embodiments of the present invention are described below.
So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments. It is to be understood that elements and features of one embodiment may be in other embodiments without further recitation and that, where possible, identical reference numerals have been used to indicate comparable elements that are common to the figures.
Embodiments of the present invention generally relate to a protective glove that is liquid proof and provides impact protection. and method(s) of making such gloves. According to various embodiments, the gloves disclosed herein include protective structures, such as blocks made from thermoplastic rubber (TPR), to protect areas of the wearer's hand from impact injuries, such as those that may be sustained from contact with industrial or other work equipment. In some embodiments, the gloves also include protective and enhanced grip coatings on an outer fabric liner or layer, such as coatings comprising one or more nitrile materials having a rough surface, to protect areas of the wearer's hand from chemical reagents, while providing enhanced grip. In some embodiments, the gloves also include a liquid proof barrier layer in at least a portion or the entirety of the glove to prevent liquid permeability therethrough. In some embodiments, the gloves include an inner fabric layer, such as a liner made of cotton inside the liquid proof barrier, for wearer's comfort. While providing one or more of the various features disclosed hereinabove, the gloves allow for flexibility and agility for the user.
The outer glove portion 10 comprises an outer fabric layer 12 having an inner surface 11 and an outer surface 13, a polymeric coating 14, and one or more protective structures 16 (also referred to as bumpers). The polymeric coating 14 is positioned between the outer fabric layer 12 and the protective structures 16.
In some embodiments, the outer fabric layer 12 is made from a yarn comprising natural and/or synthetic fibers. In some embodiments, the outer fabric layer 12 is made from a cut resistant yarn which comprises, for example, high performance poly ethylene (HPPE), steel fibers, glass fiber and combinations thereof to provide cut resistance to the entire glove. In some embodiments, the conductive yarn comprises stainless steel. In some embodiments, a conductive yarn is knit into the finger and thumb tips, and/or conductivity is otherwise provided (e.g. by including a conductive material coating) for providing touch screen capability, for both capacitive and resistive touchscreens.
In some embodiments, the polymeric coating 14 comprises a protective nitrile coating. The protective coating is configured to provide cut resistance (CE EN388:2016: level D, ANSI/ISEA105:2016: level A4), puncture resistance (CE EN388:2016: level 3), and/or abrasion resistance (CE EN388:2016: level 4) on palm area. Additionally, in some embodiments, the nitrile coating may be treated to include a rough surface texture to provide enhanced grip, for example, a “salt” grip. In some embodiments, the rough surface texture is provided at least on the palm area and over the thumb and finger tips for enhanced tactile grip and dexterity. In some embodiments, the polymeric coating 14 is red in color.
In some embodiments, the protective structures 16 are formed from thermoplastic rubber (TPR) material, and have a thickness of, for example, about 6 mm on areas above knuckles, fingers, and thumb, and about 2-5 mm above the metacarpal bones. In some embodiments, the protective structures 16 have a hardness/softness of about 30-40 shore A. Other materials, construction, heights, and durability, among other characteristics, may be used for the construction of the protective structures without departing from the scope and spirit of the present invention, as embodied in the claims appended hereto. The protective structures 16 (represented by 112, 114, 116 in
The inner glove portion 20 comprises a liquid proof barrier layer 22 and an inner fabric layer 24 having an inner surface 23 and an outer surface 25, and the inner surface 23 of the inner fabric layer 24 contacts a wearer's hand and wrist. In some embodiments, the inner fabric layer 24 is a knitted liner which comprises natural fibers (e.g., cotton) or synthetic fibers (e.g., nylon), or both. In some embodiments, the inner fabric layer 24 may optionally be treated with skin conditioners such as Aloe Vera, other skin hydrants, anti-bacterial agents, among others.
In some embodiments, the liquid proof barrier layer 22 comprises thermoplastic urethane (TPU), and the inner fabric layer 24 comprises cotton. In some embodiments, the liquid proof barrier layer 22 comprises polyurethane (PU), having a thermoplastic hot melt glue (not shown separately from the layer 22), as generally known in the art, disposed on both sides of the liquid proof barrier layer 22. In some embodiments, the liquid proof barrier layer 22 is 100% TPU, or 100% PU with hot melt glue disposed on both sides. In some embodiments, the layer 22 has a thickness between about 1 to about 3 mm, and in some embodiments, the layer 22 has a thickness between about 0.1 to about 1 mm. The material of the liquid proof barrier layer 22 is suitable for heat bonding, that is, when heated, the material of the liquid proof barrier layer 22 bonds to material in contact with the liquid proof barrier layer 22.
In some embodiments, the liquid proof barrier layer 22 may be chemical resistant, such that harmful chemicals do not penetrate the barrier layer, or penetrate the barrier layer slowly. Such a barrier may be used in combination with a TPU layer or a PU layer, or may be adhered to the inner fabric layer 24 using an adhesive.
The glove 100 is produced by heat bonding the outer glove portion 10 and the inner glove portion 20 at the liquid proof barrier layer 22. Specifically, the liquid proof barrier layer 22 heat bonds to the inner surface 11 of the outer fabric layer 12 on a first side, and to the outer surface 25 of the inner fabric layer 24 on a second side opposite the first side, as clearly seen in
As shown in
The glove 100 also includes protective structures on the dorsal side of the glove 100. The glove 100 includes a first protective structure 112 on the dorsal side of the glove that protects the bones from impact on the backhand of a palm. For example, the protective structure 112 covers a region corresponding to at least a part of the index finger metacarpal bone, and at least part of the other metacarpal bones. The glove 100 further includes a second protective structure 114 on the dorsal side of the glove that protects at least part of the pollex (i.e., thumb metacarpal bone). As illustrated, the second protective structure 114 is separate and distinct from the first protective structure 112, and includes a number of protrusions on a common base layer. The glove 100 may further include protective structures 116a, 116b, 116c, and 116d that protect the proximal phalanges, the intermediate phalanges, and the distal phalanges. In this example, protective structures 116a to 116d (collectively, 116) are flexible structures that have multiple protrusions to protect the finger bones while allowing movement of the finger bones.
The protective structures (112, 114, 116 in
At step 204, the method 200 comprises providing a liquid proof barrier layer, for example, the liquid proof barrier layer 22, and an inner fabric layer, for example the inner fabric layer 24. At step 206, the method 200 comprises placing the liquid proof barrier layer inside the outer glove portion, that is, the liquid proof barrier layer is placed in contact with the inner surface of the outer fabric layer of the outer glove portion on a first side of the liquid proof barrier layer. Further, the liquid proof barrier layer is also placed to be in contact with the outer surface of the inner fabric layer on a second side of the liquid proof barrier layer opposite the first side.
At step 208, the method 200 includes providing heat to the liquid proof barrier layer, to bond the inner surface of the outer fabric layer of the outer glove portion on the first side of the liquid proof barrier, and the outer surface of the inner fabric layer to the second side of the liquid proof barrier layer. In some embodiments, the heat is provided by a hand shaped former, over which the outer glove portion, the liquid proof barrier layer and the inner fabric layer are disposed. The former comprises heating elements, which when heated, heat the former and any material disposed on the former. In some embodiments, for example, as explained further below, heat is provided by heating the protective structures of the outer glove portion, in some embodiments, heat is provided by heating the inner fabric liner. In some embodiments, heat is provided by heating both the inner fabric liner and the protective structures. The heat is then conducted (from the protective structures or the inner fabric liner) to the liquid proof barrier layer, which then heat bonds with the outer fabric layer and the inner fabric layer.
At step 306, the method 300 comprises placing a liquid proof barrier layer, for example, the liquid proof barrier layer 22, over the outer surface of the outer fabric layer of the outer glove portion 10, for example, as seen in
At step 308, the method 300 comprises placing a hand shaped inner fabric layer, for example, the inner fabric layer 24, over the liquid proof barrier layer 22, as seen in
At the end of step 308, the method 300 yields a multi-layer structure 404 mounted on the former 402, as seen in
At step 310, the method 300 comprises heating the former 402, for example using heating elements provided in the former 402, for applying heat treatment to the multi-layer structure 404 of
While the method 300 describes embodiments of manufacturing the glove 100 in which the outer glove portion 10 is disposed on the former 402 in a reversed configuration, and then the inner glove portion (i.e., the liquid proof barrier layer and the inner fabric layer) are disposed thereon, in some embodiments, an alternate configuration for manufacturing the glove 100 is used.
For example,
At step 354, the method 350 comprises placing the liquid proof barrier layer 22 is disposed over the inner fabric layer 24, and the liquid proof barrier layer 22 is in contact with the outer surface 25 of the inner fabric layer 24. In some embodiments, the liquid proof barrier layer 22 is either a TPU layer or a PU layer with hot melt glue on both sides.
At step 356, the method 350 comprises placing the outer glove portion 10 on, and in contact with, the liquid proof barrier layer 22, such that the inner layer 11 of the outer fabric layer 12 contacts the liquid proof barrier layer 22. In this manner, at the end of step 356, a multi-layer structure is disposed on the former 402. The multi-layer structure so obtained is similar in composition to the multi-layer structure 404 of
At step 358, the method 300 comprises heating the former 402, for example using heating elements provided in the former 402, for applying heat treatment to the multi-layer structure disposed on the former 402 at the end of step 356. The heat treatment includes heating the former, and thereby the multi-layer structure to a temperature, for a duration of time, to heat bond the outer glove portion 10 to the liquid proof barrier layer 22, and the inner fabric liner 24 to the liquid proof barrier layer 22. Specifically, the application of heat causes the material of the liquid proof barrier layer 22, for example TPU material, or the hot melt glue disposed on the PU material, to bond to the outer fabric layer 12 and the inner fabric layer 24, yielding a bonded, liquid-proof, multi-layer glove 100. At step 360, the method 350 comprises removing the glove 100 from the former 402.
In some embodiments, the glove so obtained from the methods 300 or 350 is further processed by trimming cuff edges and sewing the cuff edges, further securing the inner fabric layer, the liquid proof barrier layer and the outer glove portion.
In some embodiments, the outer glove portion 10 and the inner fabric layer 24 are optionally subjected to water or liquid resistance treatment, using techniques known in the art, before or after processing by the method 300 or 350. The glove 100, so treated would not soak liquid after being exposed to liquids, allowing the glove 100 (outer fabric layer and the inner fabric layer) to stay lightweight even after the glove 100 is exposed to liquids. The water or liquid resistance treatment also prevents liquids from seeping to the cuff edge, and to the inside of the glove 100.
The glove 100 so obtained is flexible (first fabric liner), provides chemical protection (nitrile coating), enhanced grip (salt grip), impact protection (protective structures or bumpers) and liquid-proofing (PU or TPU barrier layer), and comfort (cotton liner). The glove 100 provides superior protection in industrial environments while promoting dexterity and comfort for the wearer's hand. While
Reference throughout this specification to “one embodiment,” “certain embodiments,” “some embodiments,” “one or more embodiments” or “an embodiment” means that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrases such as “in one or more embodiments,” “in certain embodiments,” “in some embodiments,” “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily referring to the same embodiment of the invention. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more of the embodiments. Also, it is to be understood that polymeric, elastomeric, and latex are used interchangeably herein with respect to polymeric coatings and raised features made from polymeric compositions.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
This application claims the benefit of priority to U.S. Provisional Patent Application No. 62/748,136 filed on Oct. 19, 2018, which is incorporated herein by reference in its entirety.
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PCT/US2019/057101 | 10/19/2019 | WO |
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WO2020/082055 | 4/23/2020 | WO | A |
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