CN-122013391-A - Ecological texture comfortable type multifunctional elastic composite yarn and manufacturing method thereof

CN122013391ACN 122013391 ACN122013391 ACN 122013391ACN-122013391-A

Abstract

The invention provides an ecological texture comfortable type multifunctional elastic composite yarn and a manufacturing method thereof, wherein the ecological texture comfortable type multifunctional elastic composite yarn comprises a core layer and an outer layer, wherein the core layer is an elastic core yarn formed by blending low-viscosity PET and high-shrinkage PET according to the mass ratio of (5-7), the intrinsic viscosity of the low-viscosity PET at 25 ℃ is 0.47-0.65 dL/g, the boiling water shrinkage rate of the high-shrinkage PET is more than or equal to 20%, the middle layer is coated on the outer side of the core layer, the middle layer is formed by blending modified bio-based polytrimethylene terephthalate fiber and regenerated polyester fiber according to the mass ratio of (3-5): (5-7), the outer layer is coated on the outer side of the middle layer, the outer layer is formed by blending modified hemp fiber and lyocell fiber according to the mass ratio of (2-4): (6-8), the synergistic lifting of the ecological environment protection, comfortable texture and multifunctional integration is realized, and the production process is optimized, and energy consumption and pollutant emission are reduced.

Inventors

LIU DUNLEI
LU JIAYING
WEI KAISHUN
CHAI SENGUANG
WANG YONGFENG
JI HONG
Xing Jianyou
LIU HAIJUN
YANG TINGTING

Assignees

江苏恒科新材料有限公司

Dates

Publication Date: 20260512
Application Date: 20260407

Claims (10)

1. An ecologically comfortable multifunctional elastic composite yarn is characterized by comprising: The core layer is an elastic core yarn formed by blending low-viscosity PET and high-shrinkage PET according to the mass ratio of (5-7) (3-5), wherein the intrinsic viscosity of the low-viscosity PET at 25 ℃ is 0.47-0.65 dL/g, and the boiling water shrinkage rate of the high-shrinkage PET is more than or equal to 20%; The middle layer is coated on the outer side of the core layer, and is formed by blending modified bio-based polytrimethylene terephthalate fibers and regenerated polyester fibers according to the mass ratio of (3-5) (5-7); the outer layer is coated on the outer side of the middle layer, and the outer layer is formed by blending modified hemp fibers and lyocell fibers according to the mass ratio of (2-4) (6-8).
2. The ecologically comfortable multifunctional elastic composite yarn of claim 1 wherein the modified bio-based polytrimethylene terephthalate fiber is modified with maleic anhydride grafting.
3. The ecologically comfortable multifunctional elastic composite yarn according to claim 1, wherein 0.8-1.2 wt% of pearlescent pigment and 0.3-0.7 wt% of antistatic agent are added to the outer layer, and the particle size of the pearlescent pigment is 1-3 μm.
4. The ecologically comfortable multifunctional elastic composite yarn according to claim 1, characterized in that, The linear density of the core layer is 8.5-12.5 dtex; The linear density of the middle layer is 15.5-19.5 dtex, the coating rate is more than or equal to 95%, and the coating twist is 350-390 turns/m; the linear density of the outer layer is 22.5-26.5 dtex, and the coating twist is 400-440 twists/meter.
5. The ecologically comfortable multifunctional elastic composite yarn according to claim 1, characterized in that, The bus density of the composite yarn is 46.5-58.5 dtex.
6. A method for manufacturing the ecological texture comfortable type multifunctional elastic composite yarn, which is used for manufacturing the ecological texture comfortable type multifunctional elastic composite yarn according to any one of claims 1 to 5, and comprises the following steps: s1, raw material pretreatment, namely respectively opening and carding low-viscosity PET, high-shrinkage PET, modified bio-based polytrimethylene terephthalate fibers, regenerated polyester fibers, modified China hemp fibers and lyocell fibers; S2, preparing a core layer, namely spinning the low-viscosity PET and the high-shrinkage PET by adopting a vortex spinning process, wherein the spinning speed is 380-420 m/min; s3, middle layer cladding, namely blending the modified bio-based polytrimethylene terephthalate fiber and the regenerated polyester fiber, and cladding the outer side of the core layer by adopting an airflow cladding process; S4, coating the outer layer, namely blending the modified China hemp fiber and the lyocell fiber, adding the pearlescent pigment and the antistatic agent, uniformly mixing, and coating the outer side of the middle layer by adopting melt co-spinning.
7. The method for manufacturing the ecological texture comfortable type multifunctional elastic composite yarn according to claim 6, wherein the modified hemp fiber adopts an alkali treatment modification process, the modifier is 5% -9% by mass of sodium hydroxide solution, the modification temperature is 55-75 ℃, and the modification time is 30-40 min.
8. The method for manufacturing an ecologically comfortable multifunctional elastic composite yarn according to claim 6, further comprising the steps of: S5, after-finishing, namely performing green crosslinking finishing and natural vegetable oil sizing on the coated composite yarn, wherein the finishing temperature is 80-100 ℃, the finishing time is 30-50 min, the sizing temperature is 110-130 ℃, and the sizing time is 20-40 min; S6, detecting, winding and packaging.
9. The method for manufacturing the ecological texture comfortable type multifunctional elastic composite yarn according to claim 8, wherein the environment-friendly crosslinking finishing adopts an environment-friendly aqueous polyurethane crosslinking agent, and the addition amount of the environment-friendly aqueous polyurethane crosslinking agent is 2.0-3.0wt% of the mass of the composite yarn.
10. The method for manufacturing the ecological texture comfortable type multifunctional elastic composite yarn according to claim 8, wherein the natural vegetable oil agent is adopted for sizing, and the addition amount of the natural vegetable oil agent is 2.5-3.5wt% of the mass of the composite yarn.

Description

Ecological texture comfortable type multifunctional elastic composite yarn and manufacturing method thereof Technical Field The invention relates to the technical field of composite yarns, in particular to an ecological texture comfortable type multifunctional elastic composite yarn and a manufacturing method thereof. Background With the global textile industry being transformed and upgraded towards the green, functional and high-end directions, the demands of consumers on textiles are extended from single basic wear performance to diversified directions of ecological environmental protection, comfortable texture, multifunctional integration and the like. In particular, in the fields of high-end knitting, home textile and functional clothing, the composite yarn with elasticity comfort, ecological environmental protection and multifunction becomes a research and development hot spot. Currently, the main elastic composite yarn in the market mostly adopts spandex as an elastic core, and is compounded with other fibers through a cladding or twisting process. However, this type of yarn has the following common technical bottlenecks: 1. environmental protection and performance defect caused by spandex dependence The polyurethane fiber production process involves a large amount of organic solvents, has poor environmental protection, is easy to age, has poor chlorine bleach resistance and insufficient rebound stability in the use process, and leads to easy relaxation and deformation of the fabric after long-term use. For example, after 50 stretch cycles, the elastic recovery decay amplitude of conventional spandex covered yarns is typically over 15%, which makes it difficult to meet the elastic durability requirements of high-end textiles. 2. Single function, and is difficult to consider comfortable texture and multifunction The existing composite yarn has multiple functions developed, such as realizing an antibacterial function by adding an antibacterial agent or realizing elasticity by spandex, but lacks of a multilayer structure cooperative design, and is difficult to simultaneously consider multiple performances such as elasticity, antibacterial property, ultraviolet resistance, skin-friendly ventilation and the like. For example, a single hemp fiber has antibacterial properties but a rough hand feeling, and a single lyocell fiber has soft but insufficient mechanical strength and no antibacterial function. How to integrate multiple functions without sacrificing comfort texture remains an industry challenge. 3. The production process is not green, and the energy consumption and pollution problems are outstanding The traditional elastic composite yarn is produced by adopting a ring spinning, high-temperature high-pressure dyeing and oily crosslinking finishing process, and has the following problems: the energy consumption of the dyeing process is high (the dyeing temperature is more than or equal to 130 ℃), and the COD discharge amount of the wastewater is large; the oily crosslinking finishing agent is easy to release formaldehyde and other harmful substances, and does not accord with the green environmental protection concept; the production process is difficult to realize the efficient utilization of the bio-based and regenerated fibers. In view of the above problems, the prior art discloses partial improvements. For example, a "bio-based elastic composite yarn" is disclosed, which is formed by compounding bio-based polyester fiber with spandex, and although the environmental protection is improved to some extent, the following drawbacks still exist: the elastic force is still provided by the spandex, so that the problems of environmental protection and rebound stability of the spandex are not fundamentally solved; due to the adoption of a double-layer structure and the lack of an intermediate transition layer, the binding force between the core layer and the outer layer is insufficient, and the structural stability is poor; the functionality is single, the limited environmental protection is realized only by the characteristics of the bio-based polyester fiber, and the functions of antibiosis, ultraviolet resistance, pearlescent color and the like are not integrated; the after-treatment still adopts the traditional high-temperature high-pressure dyeing process, and the COD discharge is not obviously reduced. Disclosure of Invention In order to solve the technical problems, the invention aims to provide the ecological texture comfortable type multifunctional elastic composite yarn and the manufacturing method thereof, which solve the technical problems of insufficient environmental protection, unbalanced elasticity and texture, single functionality, non-green production process and the like of the elastic composite yarn in the prior art, realize the cooperative promotion of elastic performance, structural stability, ecological texture and multifunction, optimize the production process, and reduce energy consu