High-fluffiness formaldehyde-free washed cotton
Through acupuncture composite technology, combined with the skin core structure of the two-component fiber layer and the method of forming a film-sensitive surface by heat treatment, the problem of formaldehyde residue in the existing washing cotton is solved, and the production of high fluffy and decay-free washing cotton is achieved. It has good warmth and fluffy properties, and is suitable for core production.
Patent Information
- Application Number
- CN202421494580.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The existing washing cotton uses chemical bonding methods during the production process, resulting in formaldehyde residues, posing a potential threat to human health.
The acupuncture composite technology is used to combine the warm layer, fluffy layer and the bicomponent fiber layer through needle puncture to avoid formaldehyde residue caused by chemical bonding. The two-component fiber layer is formed by a cross-laying web of the low melting point and high melting point polyester in the leather core structure, and a film-sensitive surface is formed by heat treatment.
The composite structure of high fluffy washing cotton without formaldehyde residue is achieved. The warm layer and fluffy layer provide good warmth and fluffy, which is suitable for making quilt cores.
Smart Images
Figure CN222987756U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of washed cotton, in particular to a highly fluffy formaldehyde-free washed cotton. Background Technique
[0002] Many raw materials of the existing washed cotton are sourced from the waste materials of cotton mills and are formed through processes such as cotton grabbing, opening, mixing, carding, and web laying, using the method of chemical bonding, making these washed cotton contain some formaldehyde. When this kind of washed cotton is used to make the quilt core, it is easy to cause harm to the human body. Formaldehyde is a colorless and strongly irritating gas and has been determined by the World Health Organization as a carcinogenic and teratogenic substance. Long-term absorption of low-dose formaldehyde will cause a series of health problems such as leukemia, pregnancy syndrome, nasopharyngeal carcinoma, colon cancer, nuclear gene mutation, and memory decline in teenagers. Therefore, it is necessary to develop a highly fluffy formaldehyde-free washed cotton. Content of the Utility Model
[0003] The purpose of the utility model is to provide a highly fluffy formaldehyde-free washed cotton, which aims to solve the problems put forward in the above background technique.
[0004] To solve the above technical problems, the purpose of the utility model is realized in this way: a highly fluffy formaldehyde-free washed cotton, including: a warming layer, with fluffy layers arranged on both sides of the warming layer, and a bicomponent fiber layer arranged on the side of the fluffy layer away from the warming layer; the warming layer, the fluffy layer, and the bicomponent fiber layer are compounded by needling; the bicomponent fiber layer is formed by cross-laying bicomponent fibers; the bicomponent fiber is of a skin-core structure, with the skin layer being low-melting-point polyester and the core layer being high-melting-point polyester.
[0005] Based on the above scheme and as a preferred scheme of the above scheme: the warming layer is formed by cross-laying hollow porous shaped polyacrylonitrile fibers.
[0006] Based on the above scheme and as a preferred scheme of the above scheme: the fluffy layer is a graphene-modified hollow polyester staple fiber layer.
[0007] Based on the above scheme and as a preferred scheme of the above scheme: the bicomponent fiber layer is heat-treated to form a film-like surface.
[0008] The beneficial effects of the utility model are: based on the highly fluffy formaldehyde-free washed cotton of the utility model, the warming layer, the fluffy layer, and the bicomponent fiber layer are compounded by needling, avoiding formaldehyde residues caused by chemical bonding methods; the warming layer utilizes the developed pore structure of the fibers to achieve good heat preservation performance; the fluffy layer utilizes the characteristics of strong three-dimensional curl of graphene-modified hollow polyester staple fibers to endow the washed cotton with good fluffiness and resilience; it is suitable for making the quilt core. Description of the Drawings
[0009] Figure 1 Schematic structural diagram of the highly fluffy formaldehyde-free washed cotton involved in Embodiment 1;
[0010] In the figure: 1 - thermal insulation layer, 2 - fluffy layer, 3 - bicomponent fiber layer. Detailed implementation manners
[0011] The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0012] Embodiment 1
[0013] Combined with Figure 1 A detailed description of this embodiment is given. A highly fluffy formaldehyde-free washed cotton includes: a thermal insulation layer 1, fluffy layers 2 are arranged on both sides of the thermal insulation layer 1, and a bicomponent fiber layer 3 is arranged on one side of the fluffy layer 2 away from the thermal insulation layer 1; the thermal insulation layer 1, the fluffy layer 2 and the bicomponent fiber layer 3 are compounded by needling; the bicomponent fiber layer 3 is formed by cross-laying bicomponent fibers; the bicomponent fiber has a skin-core structure, the skin layer is low-melting-point polyester, and the core layer is high-melting-point polyester.
[0014] Furthermore, the thermal insulation layer 1 is formed by cross-laying hollow porous profiled polyacrylonitrile fibers. The hollow porous profiled polyacrylonitrile fiber is obtained by blending polyacrylonitrile and polyvinylpyrrolidone with N,N-dimethylformamide respectively to obtain the skin layer and core layer solutions, then entering the coagulation bath through a coaxial profiled spinneret needle to obtain the nascent fiber, and finally washing and drying. The hollow porous profiled polyacrylonitrile fiber has a hollow cavity, pores exist on the fiber wall and the pores have a connected network structure, and has advantages such as large specific surface area, high porosity, good heat preservation and heat insulation effects. There are micron pores, sub-micron pores and nano pores in the fiber at the same time, and the developed pore structure endows the fiber with good heat preservation and heat insulation performance.
[0015] Furthermore, the fluffy layer 2 is a graphene-modified hollow polyester short fiber layer. The graphene-modified hollow polyester short fiber is obtained by blending graphene masterbatch with polyethylene terephthalate melt through an on-line adding device and then spinning. Graphene has multiple functions such as releasing negative ions, antibacterial, anti-ultraviolet, and antistatic. The crimp number of 5.50 dtex graphene-modified hollow polyester short fiber is 6.5 within 25 mm in length, the crimp ratio is 16.7%, the bulkiness under light load is 154 cm 3 / g, the bulkiness under heavy load is 28 cm 3 / g, with strong three-dimensional crimp feeling, good bulkiness and resilience, and also has excellent functionality, the antibacterial rate is 99.5%, the heat preservation rate is 94%, the far-infrared emissivity is 92%, and the negative ion release amount is 5500 pieces / cm 3 .
[0016] Furthermore, the bicomponent fiber layer 3 is heat-treated to form a film-like surface. After the bicomponent fiber layer 3 is heat-treated, the low-melting component in the fiber can form stable and appropriate connections at the intersection points without excessive deformation, which not only maintains the characteristics of the main fiber but also obtains a macroscopic structure with high porosity and resilience. It can also prevent the drilling out and entanglement of fine fibers, with high efficiency in forming without using chemical adhesives, avoiding the residue of formaldehyde, and having the characteristics of low-carbon environmental protection.
[0017] The high-loft formaldehyde-free water-washed cotton is suitable for making quilt cores. The thermal insulation layer 1, the fluffy layer 2, and the bicomponent fiber layer 3 are combined by needling to avoid the formaldehyde residue caused by chemical bonding. The thermal insulation layer 1 utilizes the well-developed pore structure of the fiber to achieve good thermal insulation performance. The fluffy layer 2 utilizes the characteristics of the graphene-modified hollow polyester staple fiber with strong three-dimensional crimp to endow the water-washed cotton with good fluffiness and resilience. The bicomponent fiber layer 3 is heat-treated to form a film-like surface, with a macroscopic structure with high porosity and resilience, and can also prevent the drilling out and entanglement of fine fibers.
[0018] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.
Claims
1. A high-loft formaldehyde-free washed cotton, characterized in that: include: A thermal insulation layer (1), wherein fluffy layers (2) are arranged on both sides of the thermal insulation layer (1), and a bicomponent fiber layer (3) is arranged on the side of the fluffy layer (2) away from the thermal insulation layer (1); the thermal insulation layer (1), the fluffy layer (2) and the bicomponent fiber layer (3) are compounded by needle punching; the bicomponent fiber layer (3) is formed by cross-laying of bicomponent fibers; the bicomponent fibers are of a skin-core structure, the skin layer is low-melting-point polyester, and the core layer is high-melting-point polyester.
2. The high-loft formaldehyde-free washed cotton according to claim 1, characterized in that: The thermal insulation layer (1) is formed by cross-laying of hollow porous special-shaped polyacrylonitrile fibers.
3. The high-loft formaldehyde-free washed cotton according to claim 1, characterized in that: The fluffy layer (2) is a graphene-modified hollow polyester staple fiber layer.
4. The high-loft formaldehyde-free washed cotton according to claim 1, characterized in that: The two-component fiber layer (3) is heat-treated to form a film-like surface.