CN116856172A - An anti-pilling and anti-shrinking mercerized cotton knitted fabric and its preparation process - Google Patents

Abstract

The invention provides a mercerized cotton knitted fabric that is resistant to pilling and shrinkage and a preparation process. The preparation process includes the following steps: (1) Yarn: select cotton yarn and singe the cotton yarn with a singeing machine; (2) Weaving: Weave cotton yarn into gray cloth; (3) Mercerizing: Put the gray cloth into a mercerizing liquid for mercerization treatment; the mercerizing liquid includes 2~8g/L surfactant and 150~200g/L NaOH Solution; (4) Dyeing: Dye the mercerized gray fabric; (5) Finishing: Put the dyed cloth into the finishing agent for padding and finishing; (6) Cut and sew pieces as required to obtain the bed Premium mercerized cotton knitted fabric. The invention provides a preparation process for mercerized cotton knitted fabrics. The anti-pilling, pilling and anti-shrinkage properties of the mercerized cotton knitted fabrics all reach the international first-class level, and the hand feel is soft and delicate, providing the industry with high-quality bedding products. Mercerized cotton jersey.

Description

A kind of mercerized cotton knitted fabric that resists pilling and shrinkage and its preparation process

Technical field

The invention belongs to the technical field of textile mercerized cotton knitted fabrics, and specifically relates to a mercerized cotton knitted fabric that is resistant to pilling and shrinkage and a preparation process.

Background technique

With the continuous improvement of living standards, people pay more attention to environmental protection, comfort and beauty when choosing bedding fabrics. However, the existing products on the market often cannot meet people's requirements. Knitted cotton bedding fabric is knitted and woven using a circular knitting machine. It has the advantages of strong water absorption, softness and close fit. Knitted cotton has good dyeability, bright colors and high fastness. However, due to the structural characteristics of knitted cotton, the shrinkage rate of domestically produced knitted cotton is generally above the national standard of 7%, which cannot reach the first-class level of the national standard, and the pilling resistance can generally only reach the national standard level 2-2.5, and the hand feel It is not soft and delicate enough, and the mercerized cotton knitted fabric cannot meet the width required for bedding. As a result, existing manufacturers cannot produce national standard first-class knitted bedding.

In order to improve the quality of cotton fabric bedding products and increase the market competitiveness of enterprises, domestic and foreign companies have conducted research on cotton fabrics and simulated silk. Although some products are close to the style and effect of real silk fabrics to a certain extent, the prerequisites are relatively stringent. Most of them only process simulated silk through post-finishing methods, and the process is complicated. Manufacturers are unable to produce high-quality mercerized cotton knitted fabrics. Moreover, the existing mercerized cotton knitted fabrics have poor anti-pilling, pilling, and anti-shrinkage properties. Further research and development is urgently needed. A high quality mercerized cotton knitted fabric.

Contents of the invention

The purpose of this invention is to provide a brand-new mercerized cotton knitted fabric and its preparation process. The product's anti-pilling, pilling and anti-shrinkage properties have reached the international first-class level, and the hand feel is soft and delicate, providing a high-quality bed for this industry. Made of mercerized cotton knitted fabric.

In order to achieve the above objects, the present invention provides the following technical solutions:

A preparation process for anti-pilling and anti-shrinking mercerized cotton knitted fabrics, including the following steps:

(1) Yarn: Select cotton yarn and singe the cotton yarn with a singeing machine;

(2) Weaving: weaving cotton yarn into gray cloth

(3) Mercerizing: Put the gray fabric into a mercerizing liquid for mercerizing treatment; wherein, the mercerizing liquid includes 2~8g/L surfactant and 150~200g/L NaOH solution;

(4) Dyeing: Dye the mercerized gray fabric;

(5) Finishing: Put the dyed cloth into the finishing agent for padding and finishing;

(6) Cut and sew pieces as required to obtain mercerized cotton knitted fabric.

In a preferred embodiment, the cotton yarn is spun from 100% long-staple cotton, and the variety is Fenghai No. 7. Further preferably, the long-staple cotton has a linear density of 7.3tex, 80S, and is purchased from Awati County, Xinjiang.

The present invention uses cotton yarn prepared from Xinjiang long-staple cotton, the variety Fenghai No. 7. This kind of long-staple cotton is soft and comfortable, and can increase the softness of the product. The inventor found that the cotton yarn of this variety is not easy to kink and cloth when weaving. The surface is smooth and clean, and the mercerized cotton knitted fabric prepared by combining the process of the present invention has better resistance to fluffing, pilling and shrinkage.

In a preferred embodiment, the conditions for singeing in step (1) are: the burner temperature is 900~1000°C, and the speed is 500~550m/min. The conditions of mercerization treatment in step (3) are 20°C~30°C, 60-120s.

In order to improve the anti-pilling performance of knitted cotton, it is further preferred that the singeing conditions in step (1) are: the burner temperature is 950°C and the speed is 520m/min. The conditions for mercerizing treatment in step (3) are 25°C and 90 seconds. The singeing conditions of the present invention are adapted to the selected variety of long-staple cotton. The long-staple cotton after singeing treatment makes the cloth surface smoother and less prone to pilling.

In a preferred embodiment, the mercerizing liquid includes 5g/L surfactant and 170g/L NaOH solution.

In a preferred embodiment, the surfactants in step (3) include phosphate-type anionic surfactants and AEO series non-ionic surfactants. The phosphate-type anionic surfactants and AEO series non-ionic surfactants The weight ratio of ionic surfactants is 2~5:1.

In order to improve the effect of the finishing agent, it is further preferred that the weight ratio of the phosphate anionic surfactant and the AEO series nonionic surfactant is 3:1.

Preferably, the phosphate surfactant is selected from one of ethylene glycol monobutyl ether phosphate, lauryl alcohol phosphate potassium salt, cetostearyl alcohol phosphate, and dodecyl phosphate.

Further preferably, the number of carbon atoms contained in the structure of the phosphate surfactant is between C6 and C9.

Further preferably, the phosphate surfactant is ethylene glycol monobutyl ether phosphate.

Preferably, the AEO series nonionic surfactant is selected from one of AEO-7, AEO-9, AEO-10, AEO-15 or AEO-20.

Further preferably, the AEO series nonionic surfactant is selected from AEO-9.

In this application, the mercerization treatment of pure cotton woven fabrics can be completed under the condition of lower alkali concentration, so that its structure changes, and its cross section expands from flat to a consistent hollow circle, making the mercerized cotton knitted fabrics smoother. Due to the hollow structure of cotton fiber, the amount of alkali used in the mercerization process is greatly reduced, and the treated cotton fiber has better properties. At the same time, the inventor found that the alkali concentration was too high and the alkali content of the gray fabric was large, which affected the fabric's feel and tearing strength. By using a specific surfactant, the present invention increases the penetration ability of the alkali solution and increases the softness of the fiber. Different phosphate ester surfactants have obvious differences in performance, and the length of the carbon chain also affects their alkali resistance. The present invention produces a synergistic effect by selecting a phosphate ester surfactant with a suitable carbon chain and adapting it to a nonionic surfactant. , the mercerizing effect is better. The inventor found that ethylene glycol monobutyl ether phosphate can easily form a regular monolayer adsorption film, allowing the alkali solution to quickly penetrate into the fiber. By compounding with the AEO series of non-ionic surfactants, a synergistic effect can be achieved. Reduce the concentration and consumption of alkali solution to achieve good cost performance.

In order to increase the width of the mercerized cotton knitted fabric, in a preferred embodiment, an extra wide cloth clip mercerizing machine is used for the mercerization treatment.

Preferably, the finishing agent in step (5) includes the following components by weight: 30 to 35 parts of aldehyde-free resin, 3 to 5 parts of catalyst, 2 to 4 parts of protective agent, 50 to 55 parts of softener, anti- 7 to 9 parts of pilling agent, citric acid to adjust the pH to 4 to 6.

In order to improve the quality of mercerized cotton knitted fabrics, it is further preferred that the finishing agent in step (5) includes the following components by weight: 33 parts of formaldehyde-free resin, 4 parts of catalyst, 3 parts of protective agent, and 54 parts of softener. , 9 parts of anti-pilling agent, citric acid to adjust pH to 5.

The inventor found that the type and dosage of the catalyst can affect the use effect of the aldehyde-free resin. The present invention can improve the strength and pilling resistance of the fabric by selecting appropriate catalysts and dosage;

Preferably, the formaldehyde-free resin is glyoxal dimethylurea resin, the catalyst is magnesium chloride, the protective agent is a nonionic AC polymer combination polyethylene copolymer, and the softener includes a weight ratio of 1 : 1 high-grade fatty amide derivatives and self-crosslinking silicone oil, the anti-pilling agent is water-based polyurethane.

Further preferably, the protective agent is a nonionic AC polymer combination polyethylene copolymer, purchased from Guangdong Yayuan New Materials Co., Ltd., model: polyethylene emulsion TBZ-SOFT80. The high-grade fatty amide derivatives were purchased from Huisong New Material Softener 801. The self-crosslinking silicone oil was purchased from Jining Tangyi Chemical Co., Ltd., JF-8126. The anti-pilling and pilling agent is water-based polyurethane, purchased from Guangzhou Tebensi Chemical Co., Ltd., anti-pilling and pilling agent SWA.

Preferably, the mass ratio of the formaldehyde-free resin, protective agent, softener and anti-pilling agent is (10~12):1:(17~18):(2~3).

In order to improve the quality of mercerized cotton knitted fabrics, it is further preferred that the mass ratio of the formaldehyde-free resin, protective agent, softener and anti-pilling agent is 11:1:18:3.

The present invention obtains a new type of finishing agent by compounding multiple components, and covalently cross-links the aldehyde-free resin with the hydroxyl groups in the cellulose molecules to connect adjacent molecular chains to improve the strength of the fabric and the specific softener. The addition of protective agents can improve the strength of the fabric and give the fabric an excellent feel, further improving the grade of mercerized cotton knitted fabrics. And the specific ingredients of protective agent, softener and anti-pilling agent added will cooperate with the formaldehyde-free resin to exert a cross-linking effect, further enhancing the strength between fibers. Through the combination of the two aspects, the fabric's warp and weft strength will be significantly improved. Increase, shrinkage rate decreases.

In a preferred embodiment, the finishing conditions in step (5) are: rolling residue rate 80%-85%, shaping temperature 165~170°C, and machine speed 25~30m/min.

Preferably, the rolling residue rate is 83%, the setting temperature is 167°C, and the machine speed is 26m/min.

The inventor found through experiments that finishing conditions can affect the shrinkage and strength of mercerized cotton knitted fabrics. The present invention improves the quality of bedding mercerized cotton knitted fabrics by adapting the finishing agent to specific conditions.

Compared with the prior art, the advantages and beneficial effects of the present invention are:

1. The present invention provides a preparation process for mercerized cotton knitted fabrics that are resistant to pilling and shrinkage. After a series of complex processes such as singeing, mercerization, dyeing, and finishing, the fabrics feel soft and comfortable, and the color is plump and lustrous. The luster is attractive and improves the quality of existing bedding mercerized cotton knitted fabrics on the market.

2. In the present invention, after singeing and mercerization treatment, the fine hairiness on the surface of the cotton fiber is cleaned up, causing the structure of the cotton fiber to change, making the mercerized cotton knitted fabric smoother, and the mercerized cotton knitted fabric is easier to dye with reactive dyes. The amount is greatly increased, dyeing materials are saved, and it is not easy to shrink, fluff and pill.

3. The present invention discloses a mercerizing liquid. By selecting a phosphate surfactant with a suitable carbon chain and adapting it to a non-ionic surfactant, a synergistic effect is achieved. The mercerizing treatment effect is better, and the concentration and concentration of the alkali solution can be reduced. Use consumption to achieve good cost performance.

4. The present invention obtains a new type of finishing agent by compounding multiple components, covalently cross-linking the hydroxyl groups in the cellulose molecules through the aldehyde-free resin, and adding protective agents, softeners and anti-pilling agents. The specific ingredients of the product cooperate with the formaldehyde-free resin to exert a cross-linking effect and improve the strength of knitted cotton. The addition of specific softeners and protective agents can improve the strength of the fabric and give the fabric an excellent feel, further improving the quality of the mercerized cotton knitted fabric. grade.

5. The preparation process of the present invention is simple and easy to operate. The preparation process does not have harsh prerequisites and improves the problem of product width due to process limitations. On this basis, mercerized cotton knitting with a width up to 2.5m or more can be obtained. The fabric has achieved a leading role in the industry. At the same time, the mercerizing liquid of the present invention can be well applied to the mercerizing treatment of cloth mercerizing machines, and can effectively improve the weft shrinkage of the fabric, making it less likely to produce wrinkles during washing.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Example 1

This embodiment provides a preparation process of mercerized cotton knitted fabric that is resistant to pilling and shrinkage, including the following steps:

(1) Yarn: Select cotton yarn and singe the cotton yarn with a singeing machine. The burner temperature is 950°C and the speed is 520m/min. The cotton yarn is spun from 100% long-staple cotton, and its variety is Fenghai No. 7. Further preferably, the linear density of the long-staple cotton is 7.3tex, 80S.

(2) Weaving: Weaving cotton yarn into gray cloth.

(3) Mercerization: Put the gray fabric into a mercerization liquid at 25°C for mercerization treatment for 90 seconds. The mercerization liquid includes 5g/L surfactant and 170g/L NaOH solution; the surfactant includes a weight ratio of B Glycol monobutyl ether phosphate: AEO-9 weight ratio 3:1.

(4) Dyeing: Dye the mercerized gray fabric;

(5) Finishing: Put the dyed cloth into the finishing agent for padding and finishing. The padding rate is 83%, the setting temperature is 167°C, and the machine speed is 26m/min. Among them, the finishing agent includes the following components by weight: 33 parts of formaldehyde-free resin, 4 parts of catalyst, 3 parts of protective agent, 54 parts of softener, 9 parts of anti-pilling agent, and citric acid to adjust the pH to 5. The formaldehyde-free resin is glyoxal dimethylurea resin, the catalyst is magnesium chloride, and the softener is a higher fatty amide derivative and self-crosslinking silicone oil with a weight ratio of 1:1. The high-grade fatty amide derivatives were purchased from Huisong New Material Softener 801. The self-crosslinking silicone oil was purchased from Jining Tangyi Chemical Co., Ltd., JF-8126. The protective agent is a nonionic AC polymer combination polyethylene copolymer, purchased from Guangdong Yayuan New Materials Co., Ltd., polyethylene emulsion TBZ-SOFT80. The anti-pilling and pilling agent is water-based polyurethane, purchased from Guangzhou Tebensi Chemical Co., Ltd., anti-pilling and pilling agent SWA.

(6) Cut and sew pieces as required to obtain bedding.

Example 2

The difference between this embodiment and Embodiment 1 is that the finishing agent includes the following components by weight: 40 parts of formaldehyde-free resin, 2 parts of catalyst, 6 parts of protective agent, 45 parts of softener, 10 parts of anti-pilling agent, Citric acid adjusts the pH to 6.

Example 3

The difference between this embodiment and Example 1 is that the finishing agent includes the following components in parts by weight: 38 parts of formaldehyde-free resin, 3 parts of protective agent, 49 parts of softener, 9 parts of anti-pilling agent, and citric acid to adjust the pH. is 5.

Example 4

The difference between this embodiment and Embodiment 1 is that the mercerizing liquid includes 7 g/L surfactant and 250 g/L NaOH solution, and the surfactant includes tetradecanol polyoxyethylene ether phosphate in a weight ratio MOA-3P (Wuhan Oak Specialty Chemical Co., Ltd.): AEO-20 weight ratio 1:5.

Example 5

The difference between this embodiment and Embodiment 1 is that the conditions for singeing in the step (1) are: the burner temperature is 1100°C and the speed is 450m/min; the conditions for the mercerizing treatment in the step (3) are 35°C. 200s. The conditions for finishing in step (5) are: rolling residue rate 75%, setting temperature 150°C, and machine speed 25m/min.

Example 6

The difference between this embodiment and Embodiment 1 is that the cotton yarn is spun from 100% long-staple cotton, and the variety is Xinhai 53. The mercerizing liquid is a 170g/L NaOH solution; the softener is amino silicone oil, purchased from Jiahong Technology, product number Goon1260.

Performance Testing

The knitted cotton fabrics prepared in Examples 1 to 6 were subjected to performance testing, and the results are shown in Table 1.

(1) Tear strength: measured with reference to ASTM D 5035;

(2) Shrinkage: measured with reference to the test standard AATCC 135-2012;

(3) Fluffing: Measured by grinding 1000 times with reference to GB/T4802.1;

(4) Pilling: Measured by grinding 1000 times with reference to GB/T4802.1.

Table 1 Performance test results

The mercerized cotton knitted fabric prepared in the embodiment of the present invention has high strength, low shrinkage, and high resistance to fluffing and pilling. The mercerized cotton knitted fabric for bedding has good gloss, soft and comfortable feel, and the product is deeply loved by people.

The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A preparation process of mercerized cotton knitted fabric that is resistant to pilling and shrinkage, and is characterized by comprising the following steps: (1) Yarn: Select cotton yarn and singe the cotton yarn with a singeing machine; (2) Weaving: weaving cotton yarn into gray cloth; (3) Mercerizing: Put the gray fabric into a mercerizing liquid for mercerizing treatment; wherein, the mercerizing liquid includes 2~8g/L surfactant and 150~200g/L NaOH solution; (4) Dyeing: Dye the mercerized gray fabric; (5) Finishing: Put the dyed cloth into the finishing agent for padding and finishing; (6) Cut and sew pieces as required to obtain mercerized cotton knitted fabric. 2. The preparation process of a mercerized cotton knitted fabric that is resistant to pilling and shrinkage according to claim 1, characterized in that the conditions for singeing in the step (1) are: the burner temperature is 900~1000°C, The speed is 500~550m/min; the mercerizing conditions in step (3) are 20°C~30°C, 60-120s. 3. The preparation process of a mercerized cotton knitted fabric that is resistant to pilling and shrinkage according to claim 1, wherein the surfactant in step (3) includes a phosphate anionic surfactant and AEO. series of nonionic surfactants, the weight ratio of the phosphate anionic surfactant and the AEO series nonionic surfactants is 2 to 5:1. 4. The preparation process of a kind of anti-pilling and anti-shrinking mercerized cotton knitted fabric according to claim 3, characterized in that the phosphate surfactant is selected from the group consisting of ethylene glycol monobutyl ether phosphate, laurel One of potassium alcohol phosphates, cetostearyl alcohol phosphate or dodecyl phosphate. 5. The preparation process of a kind of anti-pilling and anti-shrinking mercerized cotton knitted fabric according to claim 3, characterized in that the AEO series non-ionic surfactant is selected from the group consisting of AEO-7, AEO-9, One of AEO-10, AEO-15 or AEO-20. 6. The preparation process of an anti-pilling and anti-shrinking mercerized cotton knitted fabric according to claim 1, characterized in that the finishing agent in the step (5) includes the following components in parts by weight: aldehyde-free 30 to 35 parts of resin, 3 to 5 parts of catalyst, 2 to 4 parts of protective agent, 50 to 55 parts of softener, 7 to 9 parts of anti-pilling agent, and citric acid to adjust the pH to 4 to 6. 7. The preparation process of a mercerized cotton knitted fabric that is resistant to pilling and shrinkage according to claim 6, wherein the formaldehyde-free resin is glyoxal dimethylurea resin, and the catalyst is Magnesium chloride, the protective agent is a nonionic AC polymer combination polyethylene copolymer, the softener includes a higher fatty amide derivative and self-crosslinking silicone oil in a weight ratio of 1:1, and the anti-pilling agent is Water-based polyurethane. 8. The preparation process of an anti-pilling and anti-shrinking mercerized cotton knitted fabric according to claim 6, characterized in that the mass ratio of the formaldehyde-free resin, protective agent, softener and anti-pilling agent It is (10~12):1:(17~18):(2~3). 9. The preparation process of a mercerized cotton knitted fabric that is resistant to pilling and shrinkage according to claim 1, characterized in that the finishing conditions in step (5) are: rolling residue rate 80%-85 %, setting temperature 165~170℃, machine speed 25~30m/min. 10. Mercerized cotton knitted fabric prepared by the preparation process according to any one of claims 1 to 9.