A process for the preparation of a high resilience filled cotton for garments and the product

Abstract

The application relates to the field of fabric filling material processing, and discloses a preparation process and product of high-resilience filling cotton for clothes. The preparation process of the high-resilience filling cotton for clothes comprises the following steps: S1, opening and stretching of cotton fibers, polyester staple fibers, polyester hollow fibers with silicon, bamboo fibers and hot-melt fibers to obtain opened mixed fibers; S2, soaking treatment of the opened mixed fibers, washing and drying to obtain pretreated mixed fibers; S3, carding of the pretreated fibers to obtain carded mixed fibers; S4, laying and laminating of the carded mixed fibers to obtain a mixed fiber cotton layer; and S5, heat setting of the mixed fiber cotton layer, cooling and cutting to obtain the high-resilience filling cotton for clothes. The preparation process of opening, soaking treatment, carding, laying and heat setting is adopted, the prepared filling cotton has good bulkiness and resilience, is applied to a filling interlayer material of clothes, is not easy to deform and displace after multiple washing, and has good warmth retention.

Description

Technical Field

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

[0002] Cotton filling is soft, comfortable, warm, breathable, and moisture-wicking, and is widely used in clothing where warmth is a requirement.

[0003] Common cotton filling materials generally include pure cotton, washed cotton, memory foam, viscose fiber (artificial cotton), etc. Although these cotton materials have good softness and warmth, after multiple washes, the elasticity of the cotton filling material will decrease, its fluffiness will decrease, and it will be easy to shift and pile up, reducing the warmth, breathability and comfort of the cotton filling material in clothing.

[0004] In existing technologies, to improve the fluffiness of cotton fillings, hot-melt short fibers are mixed with cotton fibers and heat-set to melt the hot-melt short fibers, which then support and fix the cotton fibers, thereby improving the fluffiness of the cotton fillings. However, after long-term wear and washing, the fluffiness of such cotton fillings is still prone to decrease, reducing their performance in clothing. Summary of the Invention

[0005] To address the problem that existing cotton fillings have low loft and are not easy to rebound after long-term wear and washing, thus reducing their warmth and breathability, this application provides a preparation process and product for high-resilience filling cotton for clothing.

[0006] Firstly, this application provides a process for preparing high-resilience filling cotton for clothing, employing the following technical solution: A process for preparing high-resilience filling cotton for clothing includes the following preparation steps: S1. Cotton fiber, polyester staple fiber, polyester hollow fiber with silicon, bamboo fiber and hot melt fiber are opened and stretched to obtain open mixed fiber; S2. The opened mixed fibers are soaked, washed and dried to obtain pretreated mixed fibers. S3. The pretreated fibers are carded to obtain carded mixed fibers; S4. The combed mixed fibers are laid and layered 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 employing the above technical solution, cotton fiber, polyester staple fiber, polyester silicone hollow fiber, bamboo fiber, and hot-melt fiber are blended. Cotton and bamboo fibers offer good comfort, breathability, softness, and warmth; polyester staple fiber and polyester silicone hollow fiber provide good support and shape retention; and hot-melt fiber can support and fix the interwoven fibers through heat setting. The resulting filling cotton exhibits excellent overall performance. After opening and stretching, the fibers form fluffy, curved single fiber filaments with good bulk and softness. The soaking treatment not only further enhances the fiber's bulkiness but also creates an uneven, napped structure on the fiber surface, further improving the filling's performance. The filling material provides both fluffiness and warmth while preventing displacement. The fibers are then combed to reduce knotting and improve dispersion and uniformity. Web laying and layering further disperse the fibers and create a three-dimensional, interwoven structure, enhancing fiber contact stability. Heat setting melts the surface of the heat-fused fibers, bonding them to the surfaces of other fibers to form a stable, three-dimensional fiber layer. This process results in filling material with excellent support and resilience. When used as a lining material in clothing, it maintains good fluffiness and resilience even after long-term use or washing, resisting deformation and displacement, and providing excellent warmth.

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

[0009] By adopting the above technical solutions and further optimizing the fiber ratio, a better synergistic effect is achieved. The resulting filling cotton has good softness, breathability, and fluffiness, as well as good support and resilience, and is not easily deformed or shifted.

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

[0011] By adopting the above technical solutions and controlling the specifications and lengths of cotton fibers, polyester staple fibers, polyester hollow fibers with silicon, and bamboo fibers, it is possible to ensure that the fibers are better dispersed into individual filaments during opening and stretching, forming a fluffy and curved structure, thereby significantly improving the fiber's bulkiness and softness. Simultaneously, the fibers are more evenly distributed during subsequent carding, web laying, and layering processes, reducing knotting and further improving fiber dispersion and uniformity. This enhances the contact stability between fibers, forming a uniformly interwoven three-dimensional network structure, and improving the stability and support of the resulting filling cotton.

[0012] Preferably, 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℃.

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

[0014] Preferably, the soaking treatment step in step S2 is 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 open mixed fiber, heat to 40-50℃ and stir to disperse, filter after 5-10 minutes, wash with water, dry, and obtain alkali-etched mixed fiber. A2. Add 3-6 parts of fluffing agent to 80-100 parts of water, heat to 55-65℃, add alkali-etched mixed fibers, 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 fibers.

[0015] By adopting the above technical solution, the penetrant evenly penetrates to the fiber surface, and together with sodium hydroxide, slightly corrodes the surface of the loose mixed fibers without affecting the fiber properties, so that the fiber surface forms a uniform, uneven, fuzzy structure, thus producing alkali-etched mixed fibers. Then, under the action of the fluffing agent, the fuzzy structure of the fibers is fully expanded and fluffy, improving the fluffiness and warmth of the resulting filling cotton. Then, amino silicone oil emulsion and maleic anhydride-acrylamide copolymer are added. Under the adsorption of the fluffing agent, the amino silicone oil emulsion and maleic anhydride-acrylamide copolymer synergistically and intertwine and adsorb onto the loose structure surface of the fibers, further improving the dispersion and softness of the fiber molecules. After washing and drying, a pretreated mixed fiber with good fluffiness and resilience is obtained. The filling cotton made in this way has good warmth and resilience and is not easily deformed or shifted after long-term use or washing.

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

[0017] By adopting the above technical solution, using hydroxypropyltrimethylammonium chloride chitosan and polyethylene glycol 800 in a better weight ratio as penetrants, it is possible to penetrate the fiber structure surface and form a uniform hydrophilic film on the fiber surface, thereby improving the uniformity of alkaline etching on the fiber surface. At the same time, it helps the subsequent adsorption of bulking agent on the fiber surface and improves the efficiency of fiber soaking treatment.

[0018] Preferably, the leavening agent is composed of polydimethyldiallylammonium chloride and dodecyl dimethylamine oxide in a weight ratio of 1:(0.2-0.5).

[0019] By adopting the above technical solution, using polydimethyldiallylammonium chloride and dodecyl dimethylamine oxide in a better weight ratio as a bulking agent, the bulkiness of the fiber can be improved, preventing the fiber from shifting and accumulating in the filling cotton, thus improving the overall stability and warmth of the filling cotton. At the same time, it can also improve the adhesion performance of subsequent silicone-modified hydroxy acrylate emulsion and maleic anhydride-acrylamide copolymer on the fiber surface, so that the filling cotton can 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℃, and the heat setting time is 20-30s.

[0021] By adopting the above technical solution, the superior heat setting conditions ensure that the hot melt fibers are fully melted and firmly bonded with other fibers to form a stable fiber network structure. This improves the support and resilience of the filling cotton, allowing it to maintain good fluffiness and resilience even after long-term use or washing, making it less prone to deformation and improving the warmth and comfort of the filling cotton.

[0022] Preferably, the weight of the filling cotton is 280-300 g / m³. 2 .

[0023] By adopting the above technical solution, the weight of the filling cotton can be controlled at 280-300 g / m². 2 Within this range, it can be ensured that the filling cotton has good warmth retention and is lightweight.

[0024] Secondly, this application provides a high-resilience filling cotton for clothing, employing the following technical solution: A high-resilience filling cotton for clothing is prepared by the above-described manufacturing process.

[0025] By adopting the above technical solutions, the resulting filling cotton exhibits excellent resilience and fluffiness, maintaining its shape and performance even after long-term use or washing, and is not easily deformed. Simultaneously, the warmth, breathability, and comfort of the filling cotton are significantly improved. The interwoven structure between the fibers makes it more stable within the garment, preventing shifting or piling, thus ensuring the garment's lasting warmth and comfort.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The preparation process of the filling cotton for clothing in this application, through opening, soaking, carding, web laying and layering, and heat setting, produces filling cotton with good fluffiness, softness, comfort, and resilience. When used as a lining material in clothing, it is not easily deformed or shifted after long-term wear and washing, and has good warmth retention. 2. By soaking the opened mixed fibers with sodium hydroxide, a penetrating agent, a fluffing agent, amino silicone oil emulsion, and maleic anhydride-acrylamide copolymer, an uneven, raised structure is formed on the fiber surface, increasing the dispersion and fluffiness between fibers. This results in filling cotton that, while possessing good softness, warmth, and fluffiness, is not easily deformed or shifted after long-term wear and washing. 3. Using a preferred weight ratio of hydroxypropyltrimethylammonium chloride chitosan and polyethylene glycol 800 as penetrants, and a preferred weight ratio of polydimethyldiallyl ammonium chloride and dodecyl dimethylamine oxide as bulking agents, the overall stability and warmth of the filling cotton can be further improved. Simultaneously, it can enhance the adhesion of the subsequent silicone-modified hydroxyacrylate emulsion and maleic anhydride-acrylamide copolymer to the fiber surface, allowing the filling cotton to maintain good fluffiness, resilience, and softness even after long-term use and washing. During heat setting, the heat-melted fibers melt and bond with other fibers, forming a stable fiber cotton layer. The resulting filling cotton has good support and resilience, maintaining good fluffiness and resilience even after long-term use or washing, is not easily deformed, and has good warmth retention. Attached Figure Description

[0027] Figure 1 This is a photograph of the high-resilience filling cotton used in clothing according to this application. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1 The present application will be further described in detail with reference to the embodiments.

[0029] The following are some of the sources and specifications of the raw materials used in this application. The raw materials used in the preparation examples and embodiments of this application can all be obtained commercially, including but not limited to the following models and manufacturers of raw materials. Raw materials with equivalent performance can also 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 with 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: Nylon hot melt staple fiber, special chemical fiber, specifications are 4-10D, length is 45-55mm, melting point is 110℃; 6. Amino silicone oil emulsion: Dow Corning MEM-8194; 7. Maleic anhydride-acrylamide copolymer: solid content 30-40%, pH=4-5, weight average molecular weight 500-1000; 8. Hydroxypropyltrimethylammonium chloride chitosan: Kemic, degree of substitution greater than 90%, content 98%; 9. Polydimethyldiallyl ammonium chloride: LBW-3365, CAS No. 26062-79-3, purity 99%. Example

[0030] Example 1 Example 1 discloses a process for preparing high-resilience filling cotton for clothing, including the following steps: S1. Mix 6kg of cotton fiber, 2kg of polyester staple fiber, 0.5kg of polyester hollow fiber with silicon, 1kg of bamboo fiber and 1kg of hot melt fiber and open them using an opening machine. Control the opening speed at 200r / min and the opening time at 30min. After opening, put them into a staple fiber stretching machine to stretch the fibers. Control the stretching ratio of the fibers at 1.6 to obtain the opened mixed fiber. S2. Add 0.6 kg of amino silicone oil emulsion to 10 kg of water, take 6 kg of loose mixed fiber for soaking treatment, soaking temperature is 55℃, soaking for 60 min, wash with water 1-2 times, dry, and obtain pretreated mixed fiber; S3. Using a fiber carding machine, the roller speed is controlled at 150 r / min to card the pretreated fibers for 20 min to obtain carded mixed fibers. S4. Using a web-laying machine, the combed mixed fibers are laid and layered to obtain a mixed fiber cotton layer; S5. The mixed fiber cotton layer is heat-set at 100℃ for 20 seconds, then cooled and cut at 20℃ to obtain a basis weight of 280 g / m². 2 High-resilience filling cotton for clothing, see Figure 1 .

[0031] Example 2-3 The difference between Examples 2-3 and Example 1 lies in the different preparation process parameters, as detailed in Table 1 below.

[0032] Table 1 Parameter table for Examples 1-3 Example 4 The difference between Example 4 and Example 1 lies in step S2. The soaking treatment step in step S2 is as follows: A1. Add 0.4 kg of penetrant (composed of sodium dodecylbenzenesulfonate and polyethylene glycol 800 in a weight ratio of 1:2) and 0.8 kg of sodium hydroxide to 10 kg of water, stir evenly, then add 6 kg of loose mixed fiber, heat to 40℃ and stir to disperse, filter after 10 min, wash with water 1-2 times, dry, and obtain alkali-etched mixed fiber. A2. Add 0.3 kg of polyethylene emulsion as a leavening agent to 8 kg of water, heat to 55°C, add the alkali-etched mixed fiber obtained in step A1, then add 0.6 kg of amino silicone oil emulsion and 0.8 kg of maleic anhydride-acrylamide copolymer and stir to disperse. After stirring for 60 min, filter, wash with water 1-2 times, and dry with hot air to obtain pretreated mixed fiber. The polyethylene emulsion is Haian Petrochemical HA-SOFT80. Other steps and parameters are the same as in Example 1.

[0033] Examples 5-6 The difference between Examples 5-6 and Example 4 lies in the different process parameters and proportions of raw materials used in the soaking treatment step, as detailed in Table 2 below.

[0034] Table 2. Parameters for the soaking treatment steps in 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 in a weight ratio of 1:2. Everything else is 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 in a weight ratio of 1:3, while the rest is the same as in Example 4.

[0036] Example 9 The difference between Example 9 and Example 7 is that the leavening agent is different. The leavening agent in Example 9 is composed of polydimethyldiallylammonium chloride and dodecyl dimethylamine oxide in a weight ratio of 1:0.2. Everything else is the same as in Example 7.

[0037] Example 10 The difference between Example 10 and Example 7 is that the leavening agent in Example 10 is composed of polydimethyldiallylammonium chloride and dodecyl dimethylamine oxide in a weight ratio of 1:0.5, while the rest is the same as in Example 7.

[0038] Example 11 The difference between Example 11 and Example 10 is that maleic anhydride-acrylamide copolymer is replaced with an amino silicone oil emulsion in equal amounts, while the rest is the same as in Example 10.

[0039] Example 12 The difference between Example 12 and Example 10 is that nylon hot melt staple fiber, Toray Industries, Japan, is used as the hot melt fiber, with a specification of 20D, a length of 45-55mm, and a melting point of 110℃; otherwise, it is the same as Example 10.

[0040] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the open mixed fibers are not soaked and are directly combed, while the rest is the same as Example 1.

[0041] Performance testing The following tests were conducted on the performance of the high-resilience filling cotton for clothing prepared in Examples 1-12 and Comparative Example 1: 1. Resilience test Refer to the test method in Appendix C of GB / T 22796-2021 to test the resilience rate (unit: %) of the filling cotton and record the test results; 2. Deformability test Filling cotton is used as an interlayer to fill a material with a weight of 180g / m². 2 The cotton fiber fabric was sewn together and fixed with sewing thread to make a test sample. According to the test method in GB / T 8629—2017, a type A washing machine and standard detergent 1 were selected to wash the test sample. After 30 cycles of washing, the sample was dried and the thickness change rate of the filling cotton was tested (unit: %). The test results were tested and recorded. 3. Thermal insulation test Refer to the test method of Method A, constant temperature difference heat dissipation method of flat plate in GB / T 11048—1989, test the Clo value (unit: Clo) of the filling cotton. The higher the Clo value, the better the heat retention. Test and record the test results. The following are the performance test data of the high-resilience filling cotton for clothing prepared in Examples 1-12 and Comparative Example 1, as detailed in Table 3 below.

[0042] Table 3 Performance Test Data of High Resilience Filling Cotton As can be seen from Examples 1-3 and Comparative Example 1, the filling cotton prepared using the opening, soaking, carding, web laying and heat setting process of this application has good resilience and fluffiness, is not easily deformed after washing and has good heat preservation performance; compared with Example 1, the resilience rate of the filling cotton in Comparative Example 1 is reduced, the clo value is reduced, and the thickness change rate is also increased after washing.

[0043] Combining Examples 1-3 and Examples 4-10 with Table 3, it can be concluded that further treatment of the opened mixed fibers with the penetrant and sodium hydroxide of this application to obtain alkali-etched mixed fibers, followed by treatment with the bulking agent, amino silicone oil emulsion, and maleic anhydride-acrylamide copolymer of this application to prepare pretreated mixed fibers, results in filling cotton with better overall performance. Compared with Example 1, Examples 4-6 optimized the soaking treatment steps and raw materials, increasing the resilience by 2.6%, reducing the thickness change rate by 0.38%, and increasing the clo value by 0.2clo. Compared with Example 4, Examples 7-8 further optimized the type of penetrant, while Examples 9-10 further optimized the type of bulking agent compared with Example 7, further improving the performance of the filling cotton.

[0044] In Example 11, replacing maleic anhydride-acrylamide copolymer with an equal amount of amino silicone oil emulsion significantly reduced the performance of the resulting filling cotton. This may be because the synergistic effect between the amino silicone oil emulsion and the maleic anhydride-acrylamide copolymer was reduced, thus decreasing the efficiency of fiber soaking. In Example 12, using nylon hot-melt staple fiber as the hot-melt fiber also reduced the performance of the resulting filling cotton. This may be because the elasticity and support of the hot-melt fiber were reduced, thereby decreasing the warmth retention, resilience, and fluffiness of the three-dimensional network structure of the resulting filling cotton.

[0045] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A process for preparing high-resilience filling cotton for clothing, characterized in that, The preparation steps include the following: S1. Cotton fiber, polyester staple fiber, polyester hollow fiber with silicon, bamboo fiber and hot melt fiber are opened and stretched to obtain open mixed fiber; S2. The opened mixed fibers are soaked, washed and dried to obtain pretreated mixed fibers. S3. The pretreated fibers are carded to obtain carded mixed fibers; S4. The combed mixed fibers are laid and layered 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. The hot melt fiber is a nylon hot melt staple fiber with a specification of 10-20D, a length of 45-55mm, and a melting point of 110℃; The heat setting temperature in step S5 is 100-110℃, and the heat setting time is 20-30s; The soaking treatment step in step S2 is 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 open mixed fiber, heat to 40-50℃ and stir to disperse, filter after 5-10 minutes, wash with water, dry, and obtain alkali-etched mixed fiber. A2. Add 3-6 parts of fluffing agent to 80-100 parts of water, heat to 55-65℃, 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. The penetrant is composed of hydroxypropyltrimethylammonium chloride chitosan and polyethylene glycol 800 in a weight ratio of 1:(2-3); The leavening agent is composed of polydimethyldiallylammonium chloride and dodecyl dimethylamine oxide in a weight ratio of 1:(0.2-0.5).

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 fiber with silicon, 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 silicone 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 preparation process of high-resilience filling cotton for clothing according to claim 1, characterized in that, The weight of the filling cotton is 280-300 g / m².

5. A high-resilience filling cotton for clothing, characterized in that, It is prepared by the preparation process described in any one of claims 1-4.

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