Preparation process of high-resilience filling cotton for clothing and product

Abstract

The invention relates to the field of fabric filling material processing, and discloses a preparation process of high-resilience filling cotton for clothing and a product. The preparation technology of the high-resilience filling cotton for the clothes comprises the following steps that S1, cotton fibers, polyester staple fibers, polyester silicon hollow fibers, bamboo fibers and hot melting fibers are opened and stretched, and opened mixed fibers are prepared; s2, the opened mixed fibers are subjected to soaking treatment, water washing and drying, and pretreated mixed fibers are prepared; s3, carding the pretreated fibers to prepare carded mixed fibers; s4, carding mixed fiber lapping and stacking to prepare a mixed fiber cotton layer; s5, the mixed fiber cotton layer is subjected to heat setting, cooling and cutting, and the high-resilience filling cotton for the clothes is prepared. Through the preparation process of opening, soaking treatment, carding, lapping and heat setting, the prepared filling cotton has good bulkiness and rebound resilience, is applied to a filling interlayer material of clothes, is not prone to deformation and displacement after being washed for multiple times, and is good in heat retention property.

Description

Technical Field

[0001] The present application relates to the field of fabric filling material processing, and more specifically, it relates to a preparation process and product of high-resilience filling cotton for clothing. Background Art

[0002] Cotton fillers have the properties of being soft, comfortable, warm, breathable and moisture-absorbing, and are widely used in clothing that requires warmth.

[0003] Common cotton fillers generally include pure cotton, washed cotton, memory cotton, viscose fiber (artificial cotton), etc. Although these cottons all have good softness and warmth, after being washed many times, the resilience of the cotton filler will become poor, the fluffiness will decrease, and it is easy to shift and pile up and entangle, reducing the warmth, breathability and comfort of the cotton filler in clothing.

[0004] In the prior art, in order to improve the fluffiness of the cotton filler, hot-melt staple fibers are used in combination with cotton fibers, and through the method of heat setting, the hot-melt staple fibers are melted to play a role in supporting and fixing the cotton fibers, thereby improving the fluffiness of the cotton filler. However, after long-term wearing and washing, this kind of cotton filler is still prone to the problem of reduced fluffiness, reducing the service performance of the cotton filler in clothing. Summary of the Invention

[0005] In order to solve the problem that the existing cotton filler has low fluffiness and is not easy to rebound after long-term wearing and washing, reducing the warmth and breathability of the cotton filler, the present application provides a preparation process and product of high-resilience filling cotton for clothing.

[0006] In the first aspect, the present application provides a preparation process of high-resilience filling cotton for clothing, adopting the following technical scheme: A preparation process of high-resilience filling cotton for clothing, comprising the following preparation steps: S1. Open and stretch cotton fibers, polyester staple fibers, polyester siliconized hollow fibers, bamboo fibers and hot-melt fibers to obtain opened mixed fibers; S2. Soak the opened mixed fibers, wash and dry them to obtain pretreated mixed fibers; S3. Card the pretreated fibers to obtain carded mixed fibers; S4. Lay and laminate the carded mixed fibers to obtain a mixed fiber cotton layer; S5. Heat-set the mixed fiber cotton layer, cool and cut it to obtain high-resilience filling cotton for clothing.

[0007] By adopting the above technical solution, cotton fiber, polyester staple fiber, polyester hollow fiber with silicon, bamboo fiber and heat-melt fiber are mixed. Cotton fiber and bamboo fiber have good comfort breathability, softness and warmth retention. Polyester staple fiber and polyester hollow fiber with silicon have good support and shape retention. Heat-melt fiber can support and fix the interwoven fibers through heat setting. The filling cotton prepared in this way has excellent comprehensive performance; after the fibers are opened and stretched, single fiber filaments that are fluffy and curved are formed, which have good fluffiness and softness; the soaking treatment not only further improves the fluffiness of the fibers, but also forms an uneven fuzz structure on the fiber surface, further improving the fluffiness and warmth retention of the filling cotton while making the filling cotton not easy to shift; then the fibers are carded to reduce the knotting of the fibers and improve the dispersibility and uniformity of the fibers; then the web laying and laminating make the fibers evenly dispersed and form an interwoven and tiled three-dimensional layered structure, improving the contact stability between the fibers; and then through heat setting, the surface of the heat-melt fiber melts and bonds with the contact surfaces of other fibers to form a three-dimensional fiber cotton layer with a stable support structure. The filling cotton prepared in this way has good support and resilience, and when applied to the sandwich material of clothing, it can still maintain good fluffiness and resilience after long-term use or washing, is not easy to deform and shift, and has good warmth retention.

[0008] Preferably, the weight ratio of cotton fiber, polyester staple fiber, polyester hollow fiber with silicon, bamboo fiber and heat-melt fiber is (60 - 70):(10 - 20):(5 - 10):(5 - 10):(10 - 15).

[0009] By adopting the above technical solution, the fiber ratio is further optimized, which has a good synergistic effect. The filling cotton prepared has good softness, breathability and fluffiness, and at the same time has good support and resilience, and is not easy to deform and shift.

[0010] Preferably, the specification of cotton fiber is 10 - 20D and the length is 35 - 40mm; the specification of polyester staple fiber is 10 - 20D and the length is 35 - 40mm; the specification of polyester hollow fiber with silicon is 1 - 3.5D and the length is 50 - 60mm; the specification of bamboo fiber is 1 - 3.5D and the length is 40 - 50mm.

[0011] By adopting the above technical solution, controlling the specifications and lengths of cotton fiber, polyester staple fiber, polyester hollow fiber with silicon and bamboo fiber can ensure that the fibers are better dispersed into single fiber filaments during the opening and stretching processes and form a fluffy and curved structure, thereby significantly improving the fluffiness and softness of the fibers. At the same time, the fibers are more evenly distributed during the subsequent carding, web laying and laminating processes, reducing the knotting phenomenon, further improving the dispersibility and uniformity of the fibers, enhancing the contact stability between the fibers, forming a uniformly interwoven three-dimensional network structure, and improving the stability and support of the prepared filling cotton.

[0012] Preferably, the hot-melt fiber is polyamide hot-melt staple fiber, with a specification of 10-20D, a length of 45-55mm, and a melting point of 110°C.

[0013] By adopting the above technical solution, using polyamide hot-melt staple fiber with a fiber specification of 10-20D and a length of 45-55mm as the hot-melt fiber can be fully melted and firmly bonded to other fibers during the heat setting process, thereby enhancing the connection strength between the fibers and improving the overall structural stability and resilience of the filling cotton.

[0014] Preferably, the soaking treatment step in the S2 step is specifically as follows: A1. Add 4-8 parts of penetrant and 8-10 parts of sodium hydroxide to 100-120 parts of water, stir evenly, then add 60-80 parts of opened and mixed fibers, heat up to 40-50°C and stir for dispersion, filter after 5-10 minutes, wash with water, and dry to obtain alkali-etched mixed fibers; A2. Add 3-6 parts of bulking agent to 80-100 parts of water, heat up to 55-65°C, then add the alkali-etched mixed fibers, and then add 6-10 parts of amino silicone oil emulsion and 5-8 parts of maleic anhydride-acrylamide copolymer for stirring and dispersion, filter, wash with water, and dry to obtain pretreated mixed fibers.

[0015] By adopting the above technical solution, the penetrant uniformly penetrates to the fiber surface and, in cooperation with sodium hydroxide, slightly corrodes the surface of the opened and mixed fibers without affecting the fiber properties, forming a uniform and uneven hairy structure on the fiber surface to obtain alkali-etched mixed fibers; then, under the action of the bulking agent, the hairy structure of the fibers is fully stretched and fluffed, improving the fluffiness and warmth retention of the obtained filling cotton. Then, add amino silicone oil emulsion and maleic anhydride-acrylamide copolymer. Under the adsorption action of the bulking agent, the amino silicone oil emulsion and maleic anhydride-acrylamide copolymer cooperate with each other and are intertwined and adsorbed on the surface of the loose structure of the fibers, further improving the dispersibility and soft fluffiness between fiber molecules. Then, wash with water and dry to obtain pretreated mixed fibers with good fluffiness and resilience. The filling cotton prepared in this way has good warmth retention and resilience and is not easy to deform and shift during long-term use or washing.

[0016] Preferably, the penetrant is composed of hydroxypropyl trimethyl ammonium chloride chitosan and polyethylene glycol 800 with a weight ratio of 1:(2-3).

[0017] By adopting the above technical solution, using hydroxypropyl trimethyl ammonium chloride chitosan and polyethylene glycol 800 with a better weight ratio as the penetrant can penetrate the surface of the fiber structure, form a uniform hydrophilic film on the fiber surface, improve the uniformity of alkali etching on the fiber surface, and at the same time, help the subsequent bulking agent to adsorb on the fiber surface, improving the soaking treatment efficiency of the fiber.

[0018] Preferably, the bulking agent is composed of polydimethyldiallylammonium chloride and dodecyldimethylamine oxide with a weight ratio of 1:(0.2 - 0.5).

[0019] By adopting the above technical solution, using polydimethyldiallylammonium chloride and dodecyldimethylamine oxide with a better weight ratio as the bulking agent can improve the bulkiness of the fibers, prevent the fibers from shifting and piling up in the filling cotton, enhance the overall stability and warmth retention of the filling cotton. At the same time, it can also improve the adhesion performance of the subsequent organosilicon-modified hydroxyacrylate emulsion and maleic anhydride-acrylamide copolymer on the fiber surface, enabling the filling cotton to still maintain good bulkiness, resilience and softness after long-term use and washing.

[0020] Preferably, the heat setting temperature in step S5 is 100 - 110 °C, and the heat setting time is 20 - 30 s.

[0021] By adopting the above technical solution, the better heat setting conditions ensure that the hot melt fibers are fully melted and firmly bonded with other fibers, forming a stable fiber network structure, enhancing the support and resilience of the filling cotton, enabling it to still maintain good bulkiness and resilience after long-term use or washing, not easily deformed, and improving the warmth retention and comfort of the filling cotton.

[0022] Preferably, the grammage of the filling cotton is 280 - 300 g / m 2 .

[0023] By adopting the above technical solution, controlling the grammage of the filling cotton within the range of 280 - 300 g / m 2 can ensure that the filling cotton has good warmth retention and lightness.

[0024] In the second aspect, the present application provides a high-resilience filling cotton for clothing, adopting the following technical solution: A high-resilience filling cotton for clothing is prepared by the above preparation process.

[0025] By adopting the above technical solution, the prepared filling cotton has excellent resilience and bulkiness, and can still maintain good shape and performance after long-term use or washing, not easily deformed. At the same time, the warmth retention, breathability and comfort of the filling cotton are significantly improved. The interwoven structure between the fibers makes it more stable in the clothing, not easily shifted or piled up, ensuring the long-term warmth retention and comfort of the clothing.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The preparation process of the filling cotton for clothing of the present application, through the processes of opening, soaking treatment, carding, web laying and laminating, and heat setting, the obtained filling cotton has good fluffiness, soft comfort and resilience. When applied to the sandwich material of clothing, it is not easy to deform and shift during long-term wearing and washing, and has good warmth retention. 2. By soaking the opened mixed fibers with sodium hydroxide, penetrant, fluffing agent, amino silicone oil emulsion and maleic anhydride-acrylamide copolymer, an uneven fuzz structure is formed on the fiber surface, increasing the dispersibility and fluffiness between fibers. The obtained filling cotton has good softness, warmth retention and fluffiness, and is not easy to deform and shift during long-term wearing and washing. 3. Using hydroxypropyltrimethylammonium chloride chitosan and polyethylene glycol 800 with a preferred weight ratio as the penetrant, and using polydimethyldiallylammonium chloride and dodecyldimethylamine oxide with a preferred weight ratio as the fluffing agent can further improve the overall stability and warmth retention of the filling cotton. At the same time, it can also enhance the adhesion performance of the subsequent organosilicon-modified hydroxyacrylate emulsion and maleic anhydride-acrylamide copolymer on the fiber surface, so that the filling cotton can still maintain good fluffiness, resilience and softness after long-term use and washing. During the heat setting process, the hot melt fiber melts and bonds with other fibers, forming a stable fiber cotton layer. The obtained filling cotton has good support and resilience, and can maintain good fluffiness and resilience even after long-term use or washing, is not easy to deform, and has good warmth retention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. is a physical diagram of the high resilience filling cotton for clothing of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following further describes the present application in detail with reference to the Figure 1 drawings and embodiments.

[0029] The following are the sources and specifications of some raw materials of the present application. The raw materials used in the preparation examples and embodiments of the present application can all be obtained commercially, including but not limited to the raw materials of the following models and manufacturers. Raw materials with the same performance can all be used: 1. Cotton fiber: pure cotton fiber 10-20D, length 35-40mm; 2. Polyester staple fiber: Longfeng Chemical Fiber, 10-20D, length 35-40mm; 3. Polyester silicone hollow fiber: Longfeng Chemical Fiber, 1-3.5D, length 50-60mm; 4. Bamboo fiber: Xuzheng Textile, 1-3.5D, length 40-50mm; 5. Hot melt fiber: polyamide hot melt staple fiber, Teli Chemical Fiber, specification 4-10D, length 45-55mm, melting point 110°C; 6. Amino silicone oil emulsion: Dow Corning MEM-8194; 7. Maleic anhydride-acrylamide copolymer: Solids content 30-40%, pH = 4-5, weight average molecular weight 500-1000; 8. Hydroxypropyltrimethylammonium chloride chitosan: Kemike, degree of substitution greater than 90%, content 98%; 9. Poly(dimethyldiallylammonium chloride): Langbowan LBW-3365, CAS No. 26062-79-3, content 99%. Examples

[0030] Example 1 Example 1 discloses a preparation process for highly elastic filling cotton for clothing, including the following steps: S1. Mix 6 kg of cotton fiber, 2 kg of polyester staple fiber, 0.5 kg of polyester silicone hollow fiber, 1 kg of bamboo fiber and 1 kg of hot melt fiber, and use a carding machine to card them. Control the carding speed at 200 r / min and the carding time at 30 min. After carding, feed them into a short fiber drawing machine to draw the fibers, and control the drawing ratio of the fibers at 1.6 to obtain carded mixed fibers; S2. Add 0.6 kg of amino silicone oil emulsion to 10 kg of water, take 6 kg of carded mixed fibers for immersion treatment, the immersion temperature is 55 °C, the immersion time is 60 min, wash 1-2 times with water, and dry to obtain pretreated mixed fibers; S3. Use a fiber combing machine to control the roller speed at 150 r / min and comb the pretreated fibers for 20 min to obtain combed mixed fibers; S4. Use a cross-lapper to cross-lap and laminate the combed mixed fibers to obtain a mixed fiber cotton layer; S5. Heat-set the mixed fiber cotton layer, the heat-setting temperature is 100 °C, the heat-setting time is 20 s, and then cool and cut it under the condition of 20 °C to obtain highly elastic filling cotton for clothing with a gram weight of 280 g / m 2 See Figure 1 .

[0031] Examples 2-3 The differences between Examples 2-3 and Example 1 are that the preparation process parameters are different. For details, see Table 1 below.

[0032] Table 1 Parameter table of Examples 1-3 Example 4 The difference between Example 4 and Example 1 is that Step S2 is different. The immersion treatment step in Step S2 is specifically as follows: A1. Add 0.4 kg of penetrant (composed of sodium dodecylbenzenesulfonate and polyethylene glycol 800 with a weight ratio of 1:2) and 0.8 kg of sodium hydroxide to 10 kg of water. After stirring evenly, add 6 kg of carded mixed fibers, heat up to 40 °C and stir for dispersion. After 10 minutes, filter, wash 1 - 2 times with water, and dry to obtain alkali-etched mixed fibers; A2. Add 0.3 kg of polyethylene emulsion as a bulking agent to 8 kg of water. After heating up to 55 °C, add the alkali-etched mixed fibers prepared in step A1, then add 0.6 kg of amino silicone oil emulsion and 0.8 kg of maleic anhydride-acrylamide copolymer for stirring and dispersion. After stirring for 60 minutes, filter, wash 1 - 2 times with water, and dry with hot air to obtain pretreated mixed fibers. Among them, the polyethylene emulsion is HA-SOFT80 from Hai'an Petrochemical, and other steps and parameters are the same as in Example 1.

[0033] Examples 5 - 6 The differences between Examples 5 - 6 and Example 4 lie in the process parameters of the soaking treatment step and the dosage ratio of the raw materials used. See Table 2 below for details.

[0034] Table 2 Parameter Table of the Soaking Treatment Step for Examples 4 - 6 Example 7 The difference between Example 7 and Example 4 is that the penetrant is different. The penetrant in Example 7 is composed of hydroxypropyltrimethylammonium chloride chitosan and polyethylene glycol 800 with a weight ratio of 1:2, and the others are the same as in Example 4.

[0035] Example 8 The difference between Example 8 and Example 4 is that the penetrant in Example 8 is composed of hydroxypropyltrimethylammonium chloride chitosan and polyethylene glycol 800 with a weight ratio of 1:3, and the others are the same as in Example 4.

[0036] Example 9 The difference between Example 9 and Example 7 is that the bulking agent is different. The bulking agent in Example 9 is composed of polydimethyldiallylammonium chloride and dodecyldimethylamine oxide with a weight ratio of 1:0.2, and the others are the same as in Example 7.

[0037] Example 10 The difference between Example 10 and Example 7 is that the bulking agent in Example 10 is composed of polydimethyldiallylammonium chloride and dodecyldimethylamine oxide with a weight ratio of 1:0.5, and the others are the same as in Example 7.

[0038] Example 11 Example 11 is different from Example 10 in that the maleic anhydride-acrylamide copolymer is replaced with an amino silicone oil emulsion in equal amount, and the others are the same as in Example 10.

[0039] Example 12 Example 12 is different from Example 10 in that nylon hot-melt staple fiber is used as the hot-melt fiber, with the brand of Toray Japan, the specification of 20D, the length of 45 - 55mm, and the melting point of 110°C; the others are the same as in Example 10.

[0040] Comparative example Comparative example 1 Comparative example 1 is different from Example 1 in that the opened and mixed fibers are not soaked, but directly carded, and the others are the same as in Example 1.

[0041] Performance detection test The following is a performance test on the high-elasticity filling cotton for clothing prepared in Examples 1 - 12 and Comparative example 1: 1. Resilience test Referring to the test method in Appendix C of GB / T 22796-2021, test the resilience rate (unit: %) of the filling cotton and record the test results; 2. Deformability test Take the filling cotton as the interlayer and fill it between the cotton fiber fabrics with a weight of 180g / m 2 , and use sewing thread to sew and fix it to make a test sample. Referring to the test method in GB / T 8629—2017, select a type A washing machine and standard detergent 1 to conduct a cleaning test on the test sample. After 30 cycles of cleaning, dry it, and test the thickness change rate (unit: %) of the filling cotton, and test and record the test results; 3. Heat preservation test Referring to the test method of method A flat-plate constant temperature heat dissipation method in GB / T 11048—1989, test the clo value (unit: clo) of the filling cotton. The larger the clo value, the better the heat preservation performance, and test and record the test results; The following are the performance test data of the high-elasticity filling cotton for clothing prepared in Examples 1 - 12 and Comparative example 1. For details, see Table 3 below.

[0042] Table 3 Performance test data table of high-elasticity filling cotton It can be seen from Examples 1-3 and Comparative Example 1 that the resilient cotton prepared by using the opening, soaking treatment, carding, web laying and heat setting preparation process of the present application has relatively good resilience and fluffiness, is not easily deformed after washing, and has good heat preservation performance; compared with Example 1, in Comparative Example 1, the resilience rate of the resilient cotton decreases, the clo value decreases, and the thickness change rate also increases after washing.

[0043] Combining Examples 1-3 and Examples 4-10 and referring to Table 3, it can be concluded that by further using the penetrant and sodium hydroxide of the present application to treat the opened mixed fibers to obtain alkali-etched mixed fibers, and then using the fluffing agent, amino silicone oil emulsion and maleic anhydride-acrylamide copolymer of the present application to treat and prepare the pretreated mixed fibers, the comprehensive performance of the resilient cotton prepared thereby is good. Compared with Example 1, in Examples 4-6, the steps and raw materials of the soaking treatment are optimized, the resilience rate is increased by 2.6%, the thickness change rate is decreased by 0.38%, and the clo value is increased by 0.2 clo; compared with Example 4, in Examples 7-8, the type of penetrant is further optimized, and compared with Example 7, in Examples 9-10, the type of fluffing agent is further optimized, and the performance of the resilient cotton prepared is further improved.

[0044] In Example 11, when the maleic anhydride-acrylamide copolymer is replaced with an amino silicone oil emulsion in equal amount, the performance of the resilient cotton prepared is significantly reduced, which may be because the synergistic effect of the amino silicone oil emulsion and the maleic anhydride-acrylamide copolymer is reduced, and the soaking treatment efficiency of the fibers is reduced; in Example 12, when nylon hot melt staple fiber is used as the hot melt fiber, the performance of the resilient cotton prepared is also reduced, which may be because the elasticity and support of the hot melt fiber are reduced, resulting in a decrease in the heat preservation, resilience and fluffiness of the three-dimensional network structure of the resilient cotton prepared.

[0045] This specific embodiment is only an interpretation of the present application, and it is not a limitation of the present application. After reading this specification, those skilled in the art can make modifications without creative contributions to this embodiment as needed, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A preparation process for high resilience filling cotton for clothing, characterized in that: The method comprises the following preparation steps: S1, opening and stretching cotton fiber, polyester staple fiber, polyester silicon hollow fiber, bamboo fiber and hot-melt fiber to obtain opened mixed fiber; S2, soaking the opened mixed fiber, washing and drying it to obtain pretreated mixed fiber; S3, combing the pretreated fibers to obtain combed mixed fibers; S4, laying and stacking the combed mixed fibers to obtain a mixed fiber cotton layer; S5. The mixed fiber cotton layer is heat-set, cooled and cut to obtain high-resilience filling cotton for clothing.

2. The preparation process of high resilience filling cotton for clothing according to claim 1, characterized in that: The weight ratio of cotton fiber, polyester staple fiber, polyester hollow silicon fiber, bamboo fiber and hot-melt fiber is (60-70): (10-20): (5-10): (5-10): (10-15).

3. The preparation process of high resilience filling cotton for clothing according to claim 1, characterized in that: The specifications of cotton fiber are 10-20D and the length is 35-40mm; the specifications of polyester staple fiber are 10-20D and the length is 35-40mm; the specifications of polyester silicon hollow fiber are 1-3.5D and the length is 50-60mm; the specifications of bamboo fiber are 1-3.5D and the length is 40-50mm.

4. The process for preparing a high resilience filling cotton for clothing according to claim 1, characterized in that: The hot-melt fiber is nylon hot-melt staple fiber with a specification of 10-20D, a length of 45-55mm and a melting point of 110°C.

5. The process for preparing high resilience filling cotton for clothing according to claim 1, characterized in that: The soaking treatment steps in step S2 are specifically as follows: A1. Add 4-8 parts of penetrant and 8-10 parts of sodium hydroxide to 100-120 parts of water, stir evenly, then add 60-80 parts of opened mixed fiber, heat to 40-50°C, stir and disperse, filter after 5-10 minutes, wash with water, and dry to obtain alkaline etched mixed fiber; A2. Add 3-6 parts of bulking agent to 80-100 parts of water, heat to 55-65°C, add alkali-etched mixed fiber, then add 6-10 parts of amino silicone oil emulsion and 5-8 parts of maleic anhydride-acrylamide copolymer, stir and disperse, filter, wash with water, and dry to obtain pretreated mixed fiber.

6. The process for preparing high resilience filling cotton for clothing according to claim 5, characterized in that: The permeabilizing agent is composed of hydroxypropyltrimethylammonium chloride chitosan and polyethylene glycol 800 in a weight ratio of 1:(2-3).

7. The process for preparing high resilience filling cotton for clothing according to claim 5, characterized in that: The bulking agent is composed of polydimethyldiallylammonium chloride and dodecyldimethylamine oxide in a weight ratio of 1:(0.2-0.5).

8. The process for preparing high resilience filling cotton for clothing according to claim 1, characterized in that: The heat setting temperature in step S5 is 100-110° C., and the heat setting time is 20-30 seconds.

9. The process for preparing high resilience filling cotton for clothing according to claim 1, characterized in that: The wadding has a gram weight of 280-300 g / m².

10. A high resilience filling cotton for clothing, characterized in that: The invention is prepared by the preparation process according to any one of claims 1 to 9.

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