Anti-fray formulation for aramid yarns
a technology of aramid yarn and anti-fray, which is applied in the field of fabric treatment, can solve the problems of inhibiting the cutting and sewing of articles, affecting the cutting efficiency of articles, and fabric formed from filament yarns typically experience a higher degree of fraying, unraveling, and achieves the effect of more resistance to unraveling, fraying and slipping at the seams
Inactive Publication Date: 2019-06-06
HIGHLAND IND
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Benefits of technology
The patent describes a textile formulation for woven fabrics made mainly of meta-aramid filament yarns. The formulation contains colloidal silica, polyurethane dispersion, and phosphonate, which are combined to create a chemical bath. The fabric is then dipped into the bath and excess chemicals are removed. The treated fabric is dried and cured. This process makes the fabric resistant to unraveling, fraying, and slipping of seams, without affecting its beneficial properties like strength and flame retardancy.
Problems solved by technology
The use of filament yarns over spun yarns is desirable for a wide range of reasons including yarn strength and durability, but one drawback is that by virtue of the comparatively smooth yarn surfaces, fabrics formed from filament yarns typically experience a higher degree of fraying, unraveling, and slipping at the seams when compared to fabric formed from spun yarn species.
This drawback inhibits efficient cutting and sewing of articles.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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example 1
[0020]The fabric exits the chemical bath and any excess bath volume is compressed away from the fabric substrate with one or more rollers, and the treated fabric is then dried down a tenter frame and cured in an oven in a process known as a “pad-dry-cure” process. Pad roller speed may variable, with pressure between 1.0-3.0 bar, more preferably between 2.0 and 2.5 bar, and the curing may take place within an oven at about 195° C. (+ / −5° C.) for 1-2 minutes. The resulting material is resistant to the unraveling, fraying and slipping of seams common in fabrics formed from aramid yarns without inhibiting the beneficial properties of fabrics formed from such yarns, such as structural stability or flame retardancy. Table 1 illustrates that the force necessary to complete the “edge comb” test as mandated by ASTM D6479. This test is performed by a set of pins that penetrate through the fabric, and are pulled toward the edge of the fabric. This is a rake-like action and the amount of force ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract
A textile formulation for treating woven fabrics formed from aramid filament yarns that results in a resistance to the unraveling, fraying, and slipping of seams typical of fabrics formed from filament yarns is disclosed. This anti-fray formulation includes colloidal silica, polyurethane dispersion, and phosphonate combined to form a chemical bath in which the woven fabric may be dipped. This formulation adds 2%-5% to the dry weight of the woven fabric, and does not impact the beneficial properties of fabrics formed from filament yarns such as structural stability or flame retardancy, but does create a fabric that is more resistant to the unraveling, fraying, and slipping of seams. A method of creating a textile formed from aramid filament yarns exposed to an anti-fray formulation including colloidal silica, polyurethane dispersion, and phosphonate that does not impact the beneficial properties of fabrics formed from filament yarns such as structural stability or flame retardancy, but does create a fabric that is more resistant to the unraveling, fraying, and slipping of seams, is also provided.
Description
FIELD OF THE INVENTION[0001]The invention herein pertains to fabric treatments generally, and particularly pertains to a chemical bath formulation of colloidal silica, polyurethane dispersion, and phosphonate chemicals to imbue a fabric formed from the treated aramid yarns with reduced fraying and unraveling characteristics.DESCRIPTION OF THE PRIOR ART AND OBJECTIVES OF THE INVENTION[0002]The use of filament yarns over spun yarns is desirable for a wide range of reasons including yarn strength and durability, but one drawback is that by virtue of the comparatively smooth yarn surfaces, fabrics formed from filament yarns typically experience a higher degree of fraying, unraveling, and slipping at the seams when compared to fabric formed from spun yarn species. This drawback inhibits efficient cutting and sewing of articles. Another reason to choose filament yarns over spun yarns is for appearance, sheen, and smoothness of the finished article. As with all synthetic fibers, filament m...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Patent Timeline
Login to View More IPC IPC(8): D06M11/79D06M15/564D06M13/288D06M11/59
CPCD06M11/79D06M15/564D06M13/288D06M11/59D06M2101/36D06M2200/35D06M11/60D06M23/18
Inventor QUINLAN, TORSTEN D.HAWKS, PATRICK E.
Owner HIGHLAND IND