CN-121970976-A - Preparation method of pure-spun polylactic acid fiber functional bed product

Abstract

The invention provides a preparation method of a pure-spinning polylactic acid fiber functional bed product, and belongs to the technical field of spinning. The polylactic acid bed product is prepared from 100% of polylactic acid fibers, has no sensitization, skin-friendly and antibacterial effects, has no peculiar smell, is warm and breathable, avoids potential pathogenic harm caused by human microfiber inhalation in sleeping, is flame-retardant, low-smoke, nontoxic and flame-free, is extinguished immediately, and realizes the environment-friendly property that 100% of the polylactic acid fibers can be recycled.

Inventors

• SHANG JIA

Assignees

• 润益（嘉兴）新材料有限公司

Dates

Publication Date

20260505

Application Date

20230330

Claims (8)

1. 1. The preparation method of the pure-spun polylactic acid fiber functional bed product is characterized by comprising the following steps of: Selecting 100% polylactic acid fiber as the only raw material of bedding fabrics and/or fillers; knitting polylactic acid filaments into bedding fabrics through a knitting or tatting weaving process; Sequentially opening, mixing, carding, lapping, baking, cooling, trimming and rolling polylactic acid bi-component fibers and mono-component fibers to prepare a bed product filler; The fabric and the filler are both made of pure-spun polylactic acid fibers, so that the unity of the whole material and the cooperativity of chemical recycling are realized.
2. 2. The method of claim 1, wherein the polylactic acid filaments are one of DTY, FDY or flat profiled filaments and are all made from polylactic acid raw materials.
3. 3. The method of claim 1, wherein the knitting is performed by a circular knitting machine or warp knitting, and the polylactic acid filaments are DTY 75D/72-144F.
4. 4. The method according to claim 1, wherein the weaving is performed by one of a wide water jet loom, an air jet loom, and a large rapier jacquard loom, and no other fibers are mixed in the weaving process.
5. 5. The preparation method according to claim 1, wherein in the preparation process of the filler, the polylactic acid bicomponent fiber and the monocomponent fiber are uniformly mixed in the opening and mixing carding stages, so that the overall structural consistency and the thermal bonding uniformity of the filler are ensured.
6. 6. The method according to claim 1, wherein when the bedding is a quilt cover, a pillowcase or a bed sheet, the fabric is woven by a tatting process, and the finishing and embossing post-treatment can be performed, and no non-polylactic acid material is introduced in all the treatment procedures.
7. 7. The method according to claim 1, wherein when the bed is a pillow core, the filler is formed by ball rolling process after opening, mixing and carding, and the fabric is woven by a woven water jet loom, and 100% polylactic acid fiber is maintained in the whole process.
8. 8. The preparation method according to claim 1, wherein no other fiber materials are added in all preparation steps, so that the final bedding product realizes the material synergistic enhancement effect of the pure-spun polylactic acid fiber in bacteriostasis, air permeability, warmth retention and non-sensitization, ensures that the bedding product can be directly subjected to chemical recovery or natural degradation after being abandoned, and realizes full life cycle green synergy.

Description

Preparation method of pure-spun polylactic acid fiber functional bed product The application relates to a functional bed product of pure spinning polylactic acid fiber and a preparation method thereof, which are divisional applications of Chinese patent application with the application date of 2023, 03 and 30, and the application number of 202310327490.5. Technical Field The invention belongs to the technical field of spinning, and particularly relates to a preparation method of a pure-spinning polylactic acid fiber functional bed product. Background The related departments of China have proposed the recovery and reuse of waste textiles for many years, but the civil textiles are mainly blended, so that the recovery and separation difficulties are high, and the effects are still very low. The household textile material is concentrated and the dosage is large, and a piece of bedding, a quilt cover, a pillow core pillowcase throw pillow and other piece covers of a double bed are added up, the plus material and the filling are about 10 kg, and the green bedding piece cover which is healthy and comfortable and is convenient for concentrated chemical recovery and recycling is lacking on the current world. The polylactic acid fiber is prepared by fermenting green plants rich in plant sugar such as corn old grains, straws, cassava and the like as raw materials to generate lactic acid, purifying, polymerizing and melt spinning, and is a bio-based chemical synthetic fiber which can be planted, can recycle waste and can be naturally degraded. The ecological fiber can be decomposed into carbon dioxide and water in soil or seawater under the action of microorganisms, is less in smoke and nontoxic in combustion, does not cause pollution, and is sustainable ecological fiber. The fabric has good hand feeling, is antibacterial, skin friendly, breathable, peculiar smell-removing, easy to wash and quick-dry, is suitable for various next-to-skin clothing products, and has no application in 100% of the bedding pieces. Disclosure of Invention The invention aims to provide a preparation method of a pure-spinning polylactic acid fiber functional bed product, which is prepared from 100% of polylactic acid fibers. The technical scheme comprises the following steps: Selecting 100% polylactic acid fiber as the only raw material of bedding fabrics and/or fillers; knitting polylactic acid filaments into bedding fabrics through a knitting or tatting weaving process; Sequentially opening, mixing, carding, lapping, baking, cooling, trimming and rolling polylactic acid bi-component fibers and mono-component fibers to prepare a bed product filler; The fabric and the filler are both made of pure-spun polylactic acid fibers, so that the unity of the whole material and the cooperativity of chemical recycling are realized. Further, the polylactic acid filaments are one of DTY, FDY or flat special-shaped filaments, and are all made of polylactic acid raw materials. Further, the knitting and weaving are carried out by a circular knitting machine, the weaving parameters are 36 inches/32 needles, and the specifications of the polylactic acid filaments are DTY 75D/72-144F. Further, the tatting weaving adopts one of a wide water jet loom, an air jet loom or a large rapier jacquard loom, and other fibers are not mixed in the weaving process. Further, in the preparation process of the filler, the polylactic acid bi-component and the mono-component fiber are uniformly mixed in the opening and mixing carding stages, so that the integral structure uniformity and the thermal bonding uniformity of the filler are ensured. Further, when the bedding is a quilt core, the fabric is woven by a circular knitting machine, and the filler is cut and rolled after opening, lapping, hot drying and cooling forming, and pure polylactic acid fibers are used in all the working procedures. Further, when the bedding is a quilt cover, a pillowcase or a bed sheet, the fabric is woven by a tatting process, and can be subjected to roughening and embossing post-treatment, and non-polylactic acid materials are not introduced in all treatment procedures. Further, when the bedding is a pillow core, the filler is formed by a ball rolling process after opening, mixing and carding, and the fabric is woven by a woven water-jet loom, so that 100% polylactic acid fibers are maintained in the whole process. Further, other fiber materials are not added in all preparation steps, so that the bed product can be directly subjected to chemical recycling or natural degradation after being integrally used, and the green cooperation of the whole life cycle is realized. Further, the knitting of the fabric is matched with the forming process of the filler, so that the material synergistic enhancement effect of the pure-spun polylactic acid fiber is realized on the aspects of bacteriostasis, air permeability, warmth retention and no sensitization of the final bedding. The invention has the beneficial te