Patent Application
20050183215
1) Field of the Invention
The present invention relates to sublimation printing on a woven product, and more particularly, to a woven product containing natural and synthetic yarns constructed and arranged to provide a print receiving face for imaging using sublimation printing techniques to personalize the woven product.
2) Description of Related Art
Sublimation printing is a process well known in the prior art for transferring dyes to synthetic textile fabrics, such as polyester, to print virtually any image on the item. A problem arises in that natural fibers, such as cotton, do not hold the inks used in most sublimation printing processes. As is noted in U.S. Pat. No. 4,576,610, substantial difficulty has arisen in attempting to print cotton and other natural fiber fabrics by sublimation transfer of sublimation printing dye stuffs. As is well known to those skilled in the art, attempts to print fabrics made from cotton or blends of cotton and synthetic fibers illustrate this difficulty. It is known, generally, that any fabric containing cotton and printed by sublimation dye transfer of sublimable dye without a special agent assisting in transfer or bonding of the dye to the fabric, will not satisfactorily be printed with the dye. For example, unaided sublimation dye transfer printing of a fabric consisting of cotton or a mixture of cotton and polyester fibers, for example in a weight ratio of 35:65 respectively, results in totally unsatisfactory products with readily visible unprinted areas and poor wash fastness. If the cotton content of the fabric is lowered so that the ratio is 20:80, the graininess in the fabric coloration persists. Even if the ratio is changed to 10:90, so that only a very small fraction of the fabric consists of cotton fibers, the desirable fastness of the dye still is not achieved.
Attempts to solve this problem have resulted in a variety of coating and impregnation solutions that are used to treat the natural fiber yarns to allow the inks to transfer and hold to the yarns. However, these treatments increase the cost of production and have produce yarns of less than desirable texture. Further, the performance of the coatings and impregnation solutions have been generally unacceptable in holding the inks to the natural yarns for extended periods of time and washings.
Afghans are typically woven using cotton and other natural fibers. Unlike printing an image on a t-shirt, the weave of the afghan is such as to produce a desired image using a plurality of colored yarns. However, as noted above, when using only natural yarns, there is no ability to use sublimation printing to personalize the afghan with letters or images as the inks will not properly adhere to the natural fibers.
Accordingly, it is an object of the present invention to provide a woven product with a high concentration of natural yarn that also incorporates synthetic yarns selectively exposed in the weave to provide a print receiving face for imaging by sublimation printing techniques.
The above objective is accomplished according to the present invention by providing a method of constructing a woven product that includes the steps of providing natural fiber warp yarns of various colors; providing natural fiber weft yarns of various colors; and providing synthetic weft yarns capable of receiving sublimation printing ink dyes. The method includes weaving the natural fiber warp yarns, the natural fiber weft yarns, and the synthetic weft yarns together to form the woven product. The method also includes selectively exposing the natural fiber warp yarns, the natural fiber weft yarns, and the synthetic weft yarns during weaving to form woven images, and dying by sublimation printing selected areas containing exposed synthetic weft yarns for personalizing the woven product.
In a preferred embodiment, the method includes the step of controlling the natural fiber warp yarns, the natural fiber weft yarns, and the synthetic weft yarns to float the synthetic weft yarns in the selected areas and concentrating exposure of the synthetic weft yarns in the selected areas to provide a print receiving face for the sublimation printing which holds sublimation printing dye.
Preferably, the synthetic weft yarns are selected from the group consisting of polyester, nylon, and acrylic yarns. Also, it is preferred that the natural fiber warp yarns and the natural fiber weft yarns are selected from cotton yarns.
In a further embodiment, the method includes weaving the natural fiber warp yarns, the natural fiber weft yarns, and the synthetic weft yarns to produce a positive image displayed on a front side of the woven product, and a negative image displayed on a reverse side of the woven product.
In an particularly advantageous embodiment, the synthetic weft yarns are exposed on a front side of the woven product across the entire surface of the front side so that the woven image is a blank image forming a print receiving face over the entire front side.
Preferably, the natural fiber warp yarns and the natural fiber weft yarns comprise a majority of the yarns used to construct the woven product. In a particularly preferred embodiment, approximately 60% to 80% of all warp and weft yarns in the woven product are natural fiber yarns and approximately 20% to 40% of all warp and weft yarns are synthetic yarns.
In a further advantageous embodiment, the method includes the step of providing synthetic warp yarns capable of receiving sublimation printing ink dyes and selectively exposing the synthetic warp yarns together with the synthetic weft yarns in the selected areas to provide saturated coverage of the selected areas with synthetic yarns for increased printing resolution.
Preferably, the synthetic weft yarns are selected from the group consisting of white and uncolored synthetic yarns. In a preferred embodiment, the synthetic weft yarns are provided with a fluffy nap that overlap with the warp yarns to provide an increased print receiving face.
The construction designed to carry out the invention will hereinafter be described, together with other features thereof. The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings forming a part thereof, wherein an example of the invention is shown and wherein:
With reference to the drawings, the invention will now be described in more detail. Referring to
To arrive at the invention, a method for constructing afghan 10 is disclosed herein in which the method involves incorporating both natural fiber yarns and synthetic yarns woven to provide a woven image. As used herein, the term woven image is used generally to refer to the arrangement of natural and synthetic yarns which provide anything from a blank woven image to an image depicting various patterns, figures, symbols, and the like. In an embodiment as described herein, the yarns are woven to provide a woven image having printable and non-printable surfaces on a front side, designated generally as 16, of the afghan for personalization of the afghan.
Referring to
The weft yarns, designated generally as 14, also known as the “fill”, consist of a combination of natural fiber yarns 15 and synthetic yarns 17 of various colors. Again, in a preferred embodiment, natural fiber yarns 15 are cotton, but are not limited to cotton as a variety of other well known naturally fiber yarns are available for use by those skilled in the art. The synthetic yarns 17, in a preferred embodiment, are polyester, which are capable of receiving and holding ink dyes for use in sublimation printing techniques. Other synthetic yarns such as nylon and acrylics, alone or in combination with the polyester or each other may alternatively be used in the weft yarns for weaving with the warp yarns. Alternatively, the synthetic yarns could be incorporated with the natural fiber warp yarns, and the weft yarns may include only natural fiber yarns. Accordingly, the invention is not limited to specifically using the synthetic yarns in one or other of the warp and weft yarns, and may be incorporated in either or both the warp and weft. As discussed in detail herein below, synthetic yarns may advantageously be included in both the warp and the weft for selective exposure to provide a higher resolution print receiving face.
The warp and weft yarns 12 and 14 are woven together to form afghan 10 with a front side 16 and a reverse side 18, shown in
Advantageously, warp yarns 12 and weft yarns 14 are controlled to expose, also known as “floating”, synthetic yarns 17 in selected areas on front side 16 of afghan 10 to concentrate exposure of the synthetic yarns in the selected areas. The ability to control the weave to float a particular yarn is well known to those skilled in the art and will not be presented in detail herein. This controlled floating of synthetic yarns 17 provides a print receiving face where the synthetic yarns are concentrated, which is able to receive printing by sublimation printing techniques. As is depicted in
Alternatively, the synthetic weft yarns may be arranged to be exposed on front side 16 across the entire surface of front side 16 so that the woven image is a blank image forming a print receiving face over the entire front side. In this arrangement, reverse side 18 would expose only natural yarns so that front side 16 may be saturated with exposed synthetic yarns for imaging.
In a preferred arrangement, the afghan can be constructed using a majority of cotton yarns at a ratio of approximately 60% to 80% cotton to only 20% to 40% polyester, which is the opposite teaching of the prior art that required a majority of polyester to provide an adequate sublimation printing surface. In a particularly preferred embodiment, the woven product is formed using approximately 75% cotton and 25% polyester. Since the polyester yarns are floated on the top of front side 16 and concentrated in a specific area, the amount of polyester may be significantly reduce to maintain the benefits of feel from the natural fiber, while still maintaining the ability to provide a sublimation print receiving surface in selected areas.
Referring to
Although it is not necessary that 100% of the selected area where the synthetic yarns are concentrated be printing receiving material, such as polyester, it is highly desired that as much as possible comprise synthetic yarns. To provide 100% coverage in the selected area, the weave would have to include polyester yarns in the warp, as well as the weft. When printing receiving faces 20a-20c comprise less than 100% of the polyester floated on the selected portion of the image on front side 16, the printable image definition is proportionally less than it would be were the printing receiving faces 20a-20c made up of 100% polyester. However, as noted above, it is not necessary to provide a fabric made of 100% polyester to produce a print receiving face that is 100% polyester. Rather, the weave can be controlled to concentrate the polyester or other printable synthetic yarn in selected areas for printed by controlling the floating of the synthetic yarn. When synthetic yarns in the weft are combined with synthetic yarns included in the warp, which would also be floated at the selected location for forming a print receiving face, a 100% polyester print receiving face may be provided for high image quality.
Afghan 10 can be formed with synthetic yarns 17 in any desired color, although it is preferred that both the warp yarn passing through the print receiving face, as well as the weft yarn floated to form the printing receiving face 20a-20c be either white or uncolored material so as to provide for the highest possible definition and brilliance of the printing applied to the yarns.
The process of printing on the print receiving faces using sublimation printing techniques is well known in the art, and set forth in detail in U.S. Pat. No. 5,486,500, which is herein incorporated by reference for its description of sublimation printing techniques.
While a preferred embodiment of the invention has been described using specific terms, such description is for illustrative purposes only, and it is to be understood that changes and variations may be made without departing from the spirit or scope of the following claims.
This application claims priority from a provisional application filed Feb. 19, 2004 under Ser. No. 60/546,068.
| Number | Date | Country | |
|---|---|---|---|
| 60546068 | Feb 2004 | US |
