Production technology for improving the wear and discoloration resistance of dark pure cotton fabrics

Abstract

The present invention relates to a production process for improving the wear and discoloration resistance of dark pure cotton fabric, belongs to the field of textile dyeing and finishing technology, and comprises the following steps: (1) liquid ammonia finishing; (2) drying after rolling without formaldehyde resin; in the working solution used for rolling without formaldehyde resin, the concentration of formaldehyde-free resin is 100-150g / L, the concentration of catalyst is 20-30g / L, the concentration of non-ironing finishing synergist is 30-40g / L, the concentration of neutralizing acid is 1-1.5g / L, and the rest is water; (3) baking finishing; (4) drying after softening finishing; in the working solution used for softening finishing, the concentration of polyurethane softener is 40-50g / L, the concentration of neutralizing acid is 1-2g / L, and the rest is water. The wear and discoloration resistance level of the dark pure cotton fabric processed by the present invention is improved by more than 0.5 level, the moisture absorption and air permeability of the pure cotton fabric is retained, and the fabric is substantially free of strength reduction, soft to the touch, formaldehyde-free, and good wrinkle resistance.

Description

Technical Field

[0001] The invention relates to a production process for improving the wear and discoloration resistance of dark pure cotton fabrics, and belongs to the technical field of textile dyeing and finishing. Background Art

[0002] Cotton cloth is a general term for all kinds of cotton textiles. Pure cotton: (seed fiber) can be said to be the most widely used clothing fiber in the world. Pure cotton fabric is made of cotton as raw material and produced by textile technology. It is mostly used to make fashion, casual wear, underwear and shirts, and is favored by consumers.

[0003] Compared with chemical fibers, cotton fibers have better warmth retention, strong moisture absorption, good softness, and no adverse reactions such as static electricity. Therefore, most of the clothing for the elderly and infants, especially underwear and bedding, are made of pure cotton fabrics to benefit health. However, in daily life, it is often found that when wearing dark-colored pure cotton clothes, such as black and dark blue, the collar, cuffs, elbows, knees and other parts that often rub after long-term wearing are prone to discoloration or color lightening, which affects the appearance of the clothes. There is no solution to this problem so far, which has caused great trouble to people. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a production process that can improve the wear and discoloration resistance of dark pure cotton fabrics. The wear and discoloration resistance level of the treated dark pure cotton fabrics is improved by more than 0.5 levels, and the moisture absorption and breathability of the pure cotton fabrics are retained. The fabrics have basically no strength reduction, are soft to the touch, are formaldehyde-free, and have good wrinkle resistance.

[0005] The production process for improving the wear and discoloration resistance of dark-colored pure cotton fabrics according to the present invention comprises the following steps:

[0006] (1) Liquid ammonia finishing, speed 50-60m / min, fabric pH value controlled at 5.5-7.5;

[0007] (2) Rolling with formaldehyde-free resin and then drying;

[0008] In the working solution used for rolling formaldehyde-free resin, the concentration of formaldehyde-free resin WFF is 100-150g / L, the concentration of catalyst FF is 20-30g / L, the concentration of free-ironing finishing synergist PROTE-SET PI is 30-40g / L, the concentration of neutralizing acid PH-X is 1-1.5g / L, and the rest is water;

[0009] (3) Baking and finishing;

[0010] (4) Drying after softening;

[0011] In the working solution used for softening finishing, the concentration of polyurethane softener R-PU is 40-50g / L, the concentration of neutralizing acid PH-X is 1-2g / L, and the rest is water.

[0012] Among them, in step (2), the working liquid preparation steps are as follows: first add part of the water to the barrel, then add the neutralizing acid PH-X, stir, then add the formaldehyde-free resin WFF and the non-ironing finishing enhancer PROTE-SET PI, stir again, add the catalyst FF, and finally add the remaining water to the specified amount, and stir again to be uniform.

[0013] In step (2), when preparing the working solution, first add 1 / 3-1 / 2 volume of water into the material barrel.

[0014] In step (2), the temperature of drying after dipping in the working solution is 105-115° C., and the material is dried until the humidity of the material is 5-6%.

[0015] In step (3), the baking temperature is 145-150° C. and the time is 150-180 seconds.

[0016] Step (4) Softening and finishing: the working liquid preparation steps are as follows: first add part of the water into the barrel, then add the neutralizing acid PH-X, and finally add the polyurethane softener R-PU, add the remaining water to the specified amount, and stir evenly.

[0017] Step (4) Softening and finishing: In the preparation of the working solution, first add 1 / 3-1 / 2 water into the material barrel.

[0018] In step (4), after the fabric is dipped in the working solution, it is dried at 145-150° C. for 60-90 seconds.

[0019] The production process for improving the wear and discoloration resistance of dark-colored pure cotton fabrics according to the present invention adopts the following steps:

[0020] (1) Liquid ammonia finishing, speed 50-60m / min, fabric pH value controlled at 5.5-7.5;

[0021] (2) Rolling with formaldehyde-free resin and then drying;

[0022] The steps for preparing the working solution are as follows: first add 1 / 3-1 / 2 water to the barrel, then add the neutralizing acid PH-X, stir, then add the formaldehyde-free resin WFF and the non-ironing finishing synergist PROTE-SET PI, stir again, add the catalyst FF, finally add the remaining water to the specified amount, stir again to obtain a working solution with a concentration of 100-150g / L of the formaldehyde-free resin WFF, a concentration of 20-30g / L of the catalyst FF, a concentration of 30-40g / L of the non-ironing finishing synergist PROTE-SET PI, and a concentration of 1-1.5g / L of the neutralizing acid PH-X;

[0023] The fabric is dipped in the working solution and dried at 105-115℃, and the humidity of the fabric is controlled at 5-6%.

[0024] (3) Baking and finishing, the baking temperature is 145-150℃, and the time is 150-180S.

[0025] (4) Drying after softening;

[0026] The steps for preparing the working solution are as follows: first add 1 / 3-1 / 2 water to the barrel, then add the neutralizing acid PH-X, and finally add the polyurethane softener R-PU, add the remaining water to the specified amount, stir evenly, and obtain a working solution with a polyurethane softener R-PU concentration of 40-50g / L and a neutralizing acid PH-X concentration of 1-2g / L;

[0027] After the fabric is dipped in the working solution, it is dried at 145-150℃ for 60-90S.

[0028] The volume of formaldehyde-free resin and softening finishing working liquid will be calculated by the workshop based on the quantity of each batch of processed fabrics.

[0029] The manufacturer of formaldehyde-free resin WFF is Archroma Chemicals Ltd.

[0030] The manufacturer of catalyst FF is Archroma Chemicals Ltd.

[0031] The manufacturer of the synergist PROTE-SET PI is Shandong Baoshi Fine Chemical Co., Ltd.

[0032] The manufacturer of neutralizing acid PH-X is Zibo Lurui Fine Chemical Co., Ltd.

[0033] The manufacturer of polyurethane softener R-PU is Qingdao Xianda Fine Chemical Co., Ltd.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The invention discloses a production process for improving the wear and discoloration resistance of dark pure cotton fabrics, and the wear and discoloration resistance level of the treated dark pure cotton fabrics is improved by more than 0.5 level, and the moisture absorption and air permeability of the pure cotton fabrics are retained, and the fabrics have small strength reduction, soft hand feel, no formaldehyde, and good wrinkle resistance. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the embodiments.

[0037] In the following examples,

[0038] The manufacturer of formaldehyde-free resin WFF is Archroma Chemicals Ltd.

[0039] The manufacturer of catalyst FF is Archroma Chemicals Ltd.

[0040] The manufacturer of the synergist PROTE-SET PI is Shandong Baoshi Fine Chemical Co., Ltd.

[0041] The manufacturer of neutralizing acid PH-X is Zibo Lurui Fine Chemical Co., Ltd.

[0042] The manufacturer of polyurethane softener R-PU is Qingdao Xianda Fine Chemical Co., Ltd.

[0043] Embodiment 1

[0044] The production process for improving the wear and discoloration resistance of dark pure cotton fabrics described in this embodiment is for black 1 / 1 plain weave fabrics, and the warp and weft yarns are both 40S single yarns, with a warp density of 120 strands / inch and a weft density of 70 strands / inch. The specific steps are as follows:

[0045] 1) Liquid ammonia finishing, speed 60m / min, fabric pH value controlled at 5.5-7.5;

[0046] 2) Rolling formaldehyde-free resin,

[0047] The steps for preparing the working solution are as follows: first add 1 / 2 water to the barrel, then add the neutralizing acid PH-X, stir, then add the formaldehyde-free resin WFF and the non-ironing finishing synergist PROTE-SET PI, stir again, then add the catalyst FF, finally add the remaining water to the specified amount, stir again to obtain a working solution with a concentration of 1g / L of the neutralizing acid PH-X, a concentration of 100g / L of the formaldehyde-free resin WFF, a concentration of 30g / L of the non-ironing finishing synergist PROTE-SET PI, and a concentration of 20g / L of the catalyst FF;

[0048] After the fabric is dipped in the working solution, it is dried at 105℃ and the humidity of the fabric is controlled at 5%;

[0049] 3) Baking and finishing, baking temperature 145 ° C, time 150S;

[0050] 4) Soft finishing,

[0051] The steps for preparing the working solution are as follows: first add 1 / 3 of water to the barrel, then add the neutralizing acid PH-X, and finally add the polyurethane softener R-PU, add the remaining water to the specified amount, stir evenly, and obtain a working solution with a polyurethane softener R-PU concentration of 40g / L and a neutralizing acid PH-X concentration of 1g / L;

[0052] After the fabric is dipped in the working solution, it is dried at 145℃ for 60S.

[0053] Table 1 is a performance test comparison of the pure cotton fabric prepared in Example 1 of the present invention and conventional pure cotton fabric.

[0054] Table 1 Performance test comparison of pure cotton fabric of Example 1 and conventional pure cotton fabric.

[0055]

[0056]

[0057] Embodiment 2

[0058] The production process for improving the wear and discoloration resistance of dark pure cotton fabrics described in this embodiment is a dark blue 2 / 2 right-bend fabric, the warp and weft yarns are both 50S single yarns, the warp density is 160 strands / inch, and the weft density is 100 strands / inch. The specific steps are:

[0059] 1) Liquid ammonia finishing, speed 55m / min, fabric pH value controlled at 5.5-7.5;

[0060] 2) Rolling formaldehyde-free resin,

[0061] The steps for preparing the working solution are as follows: first add 1 / 2 water to the barrel, then add the neutralizing acid PH-X, stir, then add the formaldehyde-free resin WFF and the non-ironing finishing synergist PROTE-SET PI, stir again, then add the catalyst FF, finally add the remaining water to the specified amount, stir again to obtain a working solution with a concentration of 1g / L of the neutralizing acid PH-X, a concentration of 120g / L of the formaldehyde-free resin WFF, a concentration of 35g / L of the non-ironing finishing synergist PROTE-SET PI, and a concentration of 24g / L of the catalyst FF;

[0062] After the fabric is dipped in the working solution, it is dried at 110℃ and the humidity of the fabric is controlled at 5.5%;

[0063] 3) Baking and finishing, baking temperature 150°C, time 160S;

[0064] 4) Soft finishing,

[0065] The steps for preparing the working solution are as follows: first add 1 / 2 of water to the barrel, then add the neutralizing acid PH-X, and finally add the polyurethane softener R-PU, add the remaining water to the specified amount, stir evenly, and obtain a working solution with a polyurethane softener R-PU concentration of 45g / L and a neutralizing acid PH-X concentration of 1.5g / L;

[0066] After the fabric is dipped in the working solution, it is dried at 150℃ for 70S.

[0067] Table 2 is a performance test comparison of the pure cotton fabric of Example 2 of the present invention and conventional pure cotton fabric.

[0068] Table 2 Performance test comparison of pure cotton fabric and conventional pure cotton fabric in Example 2

[0069]

[0070] Embodiment 3

[0071] The production process for improving the wear and discoloration resistance of dark pure cotton fabrics described in this embodiment is a dark blue 3 / 3 right-bend fabric, with warp and weft yarns both using 30S single yarns, a warp density of 120 strands / inch, and a weft density of 90 strands / inch. The specific steps are:

[0072] 1) Liquid ammonia finishing, speed 50m / min, fabric pH value controlled at 5.5-7.5;

[0073] 2) Rolling formaldehyde-free resin,

[0074] The steps for preparing the working solution are as follows: first add 1 / 3 water to the barrel, then add the neutralizing acid PH-X, stir, then add the formaldehyde-free resin WFF and the non-ironing finishing synergist PROTE-SET PI, stir again, then add the catalyst FF, finally add the remaining water to the specified amount, stir again to obtain a working solution with a concentration of 1.5 g / L of the neutralizing acid PH-X, a concentration of 150 g / L of the formaldehyde-free resin WFF, a concentration of 40 g / L of the non-ironing finishing synergist PROTE-SET PI, and a concentration of 30 g / L of the catalyst FF;

[0075] After the fabric is dipped in the working solution, it is dried at 115℃ and the humidity of the fabric is controlled at 6%;

[0076] 3) Baking and finishing, baking temperature 150°C, time 180S;

[0077] 4) Soft finishing,

[0078] The steps for preparing the working solution are as follows: first add 1 / 3 of water to the barrel, then add the neutralizing acid PH-X, and finally add the polyurethane softener R-PU, add the remaining water to the specified amount, stir evenly, and obtain a working solution with a polyurethane softener R-PU concentration of 50g / L and a neutralizing acid PH-X concentration of 2g / L;

[0079] After the fabric is dipped in the working solution, it is dried at 150℃ for 90S.

[0080] Table 3 is a performance test comparison of the pure cotton fabric of Example 3 of the present invention and conventional pure cotton fabric.

[0081] Table 3 Performance test comparison of pure cotton fabric of Example 3 and conventional pure cotton fabric.

[0082]

Claims

1. A production process for improving the wear and discoloration resistance of dark pure cotton fabrics, characterized in that: Black 1 / 1 plain fabric, warp and weft yarns are both 40S single yarns, warp density is 120 strands / inch, weft density is 70 strands / inch, the specific steps are: 1) Liquid ammonia finishing, speed 60m / min, fabric pH value controlled at 5.5-7.5; 2) Rolling formaldehyde-free resin, The steps for preparing the working solution are as follows: first add 1 / 2 water to the barrel, then add the neutralizing acid PH-X, stir, then add the formaldehyde-free resin WFF and the non-ironing finishing synergist PROTE-SET PI, stir again, then add the catalyst FF, finally add the remaining water to the specified amount, stir again to obtain a working solution with a concentration of 1g / L of the neutralizing acid PH-X, a concentration of 100g / L of the formaldehyde-free resin WFF, a concentration of 30g / L of the non-ironing finishing synergist PROTE-SET PI, and a concentration of 20g / L of the catalyst FF; After the fabric is dipped in the working solution, it is dried at 105℃ and the humidity of the fabric is controlled at 5%; 3) Baking and finishing, baking temperature 145℃, time 150S; 4) Soft finishing, The steps for preparing the working solution are as follows: first add 1 / 3 of water to the barrel, then add the neutralizing acid PH-X, and finally add the polyurethane softener R-PU, add the remaining water to the specified amount, stir evenly, and obtain a working solution with a polyurethane softener R-PU concentration of 40g / L and a neutralizing acid PH-X concentration of 1g / L; After the fabric is dipped in the working solution, it is dried at 145℃ for 60S.

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