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Improvement of strength and abrasion resistance of durable press finished cellulosic materials

A kind of anti-abrasion and cellulose technology, applied in the direction of anti-abrasion fiber, plant fiber, fiber treatment, etc., can solve the problems of poor anti-abrasion, lower mechanical strength of cotton fabric, lower mechanical properties of fiber surface, etc.

Inactive Publication Date: 2005-08-10
NOVOZYMES NORTH AMERICA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cellulose molecules are cross-linked by formaldehyde-based resins and with polycarboxylic acids, such as BTCA, resulting in hardening of the cellulose macromolecular network and brittleness of the fibers, thereby reducing the mechanical strength of the treated cotton fabric
These same mechanisms are responsible for reduced mechanical properties of the fiber surface and thus less abrasion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1: Treatment with modified cutinase from Humicola insolens

[0059] A white and mercerized 100% cotton fabric (Harbour Twill) from Gayley and Lord (Model: 1133090, Lot: 4040) was used in this example. The fabric weighs approximately 80oz / square yard. It was used to prepare butanetetracarboxylic acid (BTCA)-cotton fabrics.

[0060] For BTCA-cotton products, a bath is prepared and placed into the pad system.

[0061] The bath contains:

[0062] Sodium hypophosphite: 5% w / w

[0063] Butanetetracarboxylic acid: 10% w / w

[0064] Water: 85% w / w

[0065] The fabric was passed through a BTCA bath and filled at a rate of 5 yards / minute under a pressure of 50 psi / nip. The fabric was then dried at 250°F and cured at 360°F at 5 yards / minute. The fabric is dried or cured in an approximately 20 foot long apparatus. The BTCA-cotton fabric was cut into 27 x 45 cm2 samples. Samples were washed with approximately 18 gallons of water and 20 g / l AATCC standard detergent fo...

Embodiment 2

[0069] Example 2: Treatment with esterase from pig liver

[0070]The BTCA-cotton samples used in this example were the same as described in Example 1. The samples were first co-treated in 0.1 N NaOH for 5 minutes and then rinsed with deionized water for about 15 minutes. Squeeze out excess water by hand before treating with enzymes. Enzyme treatment was performed in a Labomat (Werner Mathis, NC) at 50°C for 2 hours at 50 rpm and a 10:1 (v / w) liquid:fabric ratio. Table 2 shows the enzyme dosages. Esterase from porcine liver was purchased from SIGMA-Aldrich (E-3019). The pH at the end of treatment was 9.05 and 8.85 for 2-A and 2-B, respectively.

[0071] The breaking strength and tenacity of the fabrics were determined according to ASTM D 5035-90 using an Instron using a 25 mm ripped sliver (1R-E). The average values ​​of 5 samples are shown in Table 2. After three washes according to AATCC, the appearance of the fabrics was evaluated according to AATCC Method 124-1992 by ...

Embodiment 3

[0073] Example 3: Treatment with cutinase from Humicola insolens

[0074] Virgin 100% cotton was used for comparison, which is BTCA free. The BTCA cotton samples were the same as in Example 1. Enzyme treatment was performed in a Labomat (Werner Mathis, NC) at 50 rpm and a 10:1 (v / w) liquid:fabric ratio at 65°C for 1 hour. Sodium phosphate buffer (5 mM and pH 7.5) was used in this example. Table 3 shows the enzyme dosages. A protein engineered cutinase derived from strain Humicola insolens DSM1800 (Novozymes A / S) was used. The pH at the end of the treatment is shown in Table 3.

[0075] The breaking strength and tenacity of the fabrics were determined according to ASTM D 5035-90 using an Instron using a 25 mm ripped sliver (1R-E). The average values ​​of 5 samples are shown in Table 3. After three washes according to AATCC, the appearance of the fabrics was evaluated according to AATCC Method 124-1992 by three professionals. The average ratings are also shown in Table 3....

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PUM

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Abstract

The invention relates to a method for improving the abrasion resistance and tensile strength of durable press finished cellulosic materials, such as cotton. According to the method of the present invention the cellulosic material is treated with an enzyme composition capable of removing cross links from the cellulosic material, especially cross links on the material surface.

Description

field of invention [0001] This invention relates to a method of improving the abrasion resistance and tensile strength of durable press finishing cellulosic materials such as cotton, and more particularly to Process for treating durable press-finished cellulosic materials with enzyme compositions to improve abrasion resistance and tensile strength. Background of the invention [0002] Durable press finishes are widely used in the textile industry to impart wrinkle resistance to cellulosic materials such as cotton fabrics and garments. Durable press finishes such as dimethyl dihydroxy ethylene urea (DMDHEU) and dimethylol propyl carbamate (DMPC) react to form covalent crosslinks between cellulosic polymers to impart Wrinkle resistance of cotton fabrics. Cellulose crosslinking on the fiber / fabric surface can be exacerbated by migration of reactants to the surface during drying and curing, resulting in increased crosslinking on the surface, which results in increased brittlen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/192D06M13/358D06M13/425D06M13/432D06M15/423D06M16/00
CPCD06M16/003D06M2200/35D06M2200/20D06M15/423D06M13/192D06M13/419D06M13/432D06M13/358D06M13/425D06M2101/06
Inventor 徐辉吉姆·刘卡罗琳·希索亚·萨蒙
Owner NOVOZYMES NORTH AMERICA INC
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