阅读说明：本技术 一种生物可降解聚酯纤维作芯线的雪尼尔纱的制备方法 (Preparation method of chenille yarn with biodegradable polyester fiber as core wire ) 是由 金淑兰 郑今欢 罗军 徐天伟 丁琳 王成龙 时咏松 柴璐娜 朱仁庆 于 2020-12-01 设计创作，主要内容包括：本发明一种实现生物可降解聚酯纤维作芯线的雪尼尔纱制备方法,包括芯线采用刚经过预处理的生物可降解聚酯纤维的纱线输入,绒纱采用网络丝或生物可降解聚酯纤维纱线输入,依靠回转头的回转使绒纱缠绕于割距片上,在罗拉轴的握持下固定绒毛长度,在出口处被刀片分割成两片形成片绒,排绒为两组芯线夹持,在反转锭子的并合加捻下使片绒旋转成棒状蓬松纱,得到生物可降解聚酯纤维作芯线的雪尼尔纱。本发明的芯线采用的是生物可降解聚酯纤维,适合的条件下是可以完全生物降解的,当产品处于生命周期末端时,随着芯线被土壤中微生物酶解、雪尼尔纱组织能够迅速分解。(The invention relates to a preparation method of chenille yarn for realizing that biodegradable polyester fiber is used as core wire, which comprises the steps of inputting the core wire by adopting the yarn of the biodegradable polyester fiber which is just pretreated, inputting the wool yarn by adopting network yarn or biodegradable polyester fiber yarn, winding the wool yarn on a cutting distance sheet by depending on the rotation of a rotary head, fixing the length of the wool under the holding of a roller shaft, dividing the wool into two pieces by a blade at an outlet to form sheet wool, arranging the wool into two groups of core wire clamping, and rotating the sheet wool into rod-shaped fluffy yarn under the combined twisting of a reverse spindle to obtain the chenille yarn using the biodegradable polyester fiber as the core wire. The core wire of the invention adopts biodegradable polyester fiber which can be completely biodegraded under proper conditions, and when the product is positioned at the end of the life cycle, the core wire can be rapidly decomposed along with the enzymolysis of microorganisms in soil and the organization of the chenille yarn.)

1. A method for preparing chenille yarn using biodegradable polyester fiber as core wire, using chenille yarn twisting machine to make chenille yarn, inputting core wire and pile yarn at specified position, characterized in that, the preparation method comprises inputting the core wire by the yarn of the biodegradable polyester fiber which is just pretreated, inputting the pile yarn by network yarn or biodegradable polyester fiber yarn, winding the pile yarn on a cutting distance sheet by the rotation of a rotary head, fixing the length of the pile under the holding of a roller shaft, dividing the pile into two pieces by a blade at an outlet to form pile sheet, arranging the pile to be two groups of core wire clamping, rotating the pile sheet into rod-shaped fluffy yarn under the combining twisting of a reverse spindle, obtaining the chenille yarn using the biodegradable polyester fiber as core wire.

2. The method for preparing chenille yarn with biodegradable polyester fiber as core line as claimed in claim 1, wherein the yarn of biodegradable polyester fiber comprises PLA yarn or blended yarn of dacron and PLA/PHBV.

3. The method for preparing chenille yarn with core made of biodegradable polyester fiber as claimed in claim 2, wherein the PLA/PHBV is cellulose fiber with a PLA/PHBV ratio of 70/30.

4. The method for preparing chenille yarn using biodegradable polyester fiber as core yarn according to claim 1 or 2, wherein the pretreatment is a preheating treatment using a heat setting box.

5. The method as claimed in claim 4, wherein the heat treatment temperature of the PLA yarn is 110-120 ℃ and the time is 5-20 min.

6. The method for preparing chenille yarn with biodegradable polyester fiber as core wire as claimed in claim 4 or the above claim, wherein the heat treatment temperature of PLA/PHBV is 100-110 ℃ for 5-20 min.

7. The method of claim 2, wherein when the yarn of the biodegradable polyester fiber is a blended yarn of polyester and PLA/PHBV, 2 32SPLA/PHBV strands are twisted with a twist of 32-35 twists/10 cm to form a 16SPLA/PHBV strand, and then 16S polyester staple fibers are added to form the core yarn.

8. The method for preparing chenille yarn with biodegradable polyester fiber as core line according to claim 2, wherein when the yarn of biodegradable polyester fiber is PLA yarn, two or more PLA fibers are tried to be combined and twisted.

9. The method for preparing chenille yarn using biodegradable polyester fiber as core thread according to claim 1, wherein the width of the cutting distance piece is 7-15 mm.

10. The method for preparing chenille yarn with biodegradable polyester fiber as a core wire according to claim 1, wherein the parameters of the chenille yarn twisting machine are set to satisfy D/T2-6, wherein D is density of wool yarn, and T is twist of snow yarn.

Technical Field

The invention belongs to the field of textile processing, and relates to a preparation method of chenille yarn by using biodegradable polyester fiber as a core wire.

Background

The chenille yarn is a spiral, rod-shaped, bulky yarn spun by twisting and sandwiching a cut pile yarn between core yarns, and is composed of a core yarn and a pile yarn, and a theoretical structure model is shown in fig. 1. The chenille yarn has excellent softness, fluffiness and lightness due to the unique structure, and the product has stronger vitality in the market. In the process of twisting chenille yarns, the core wires advance by means of the rotation of the roller shaft and are twisted by the rotation of the spindle, and a large tension is applied in the process, so that the core wires of the chenille yarns are required to have a high breaking strength.

Chenille textile products such as bathroom water absorption carpets, hall dust absorption ground mats, bedside mat towels, yoga mats, outdoor travel mats and the like are mainly used for water absorption, dust absorption, paving and skid prevention, and are also used for decoration, and the development is faster in recent years. The conventional chenille bathroom textile is mostly made of pure terylene with better mechanical property, and has super water absorption and moisture transmission performance and good durability through proper after-finishing processing. However, the chemical structure of terylene is extremely stable, the biodegradability is poor, the pure terylene bathroom textiles are difficult to naturally degrade after being discarded, the market development is seriously influenced, and the adoption of the appropriate biodegradable polyester fiber to manufacture the ecological environment-friendly bathroom textiles is a necessary development trend in the future market.

The existing patents related to chenille yarn relate to further improving the functionality of chenille yarn, such as patents for increasing the flame retardance such as antibacterial flame-retardant chenille fabric with application number of cn201510708029.x, production process of novel chenille strip flame-retardant shading cloth with application number of CN201911335008.2, flame-retardant regenerated terylene chenille yarn with application number of CN201822097273.9, and the like;

there are methods for preparing fluffy chenille yarns for low boiling water, such as CN109680359B, which impart a unique chenille style, and a process for producing creped chenille sofa fabric, which is disclosed as CN 109898331A. However, a method for preparing the chenille yarn by using biodegradable polyester fiber materials such as PLA (polylactic acid), PHBV (poly 3-hydroxybutyrate-CO-3-hydroxyvalerate) and the like as the core wire to endow the chenille yarn with better biodegradability is not known.

The PLA fiber is aliphatic polyester fiber which is prepared by adopting renewable starch raw materials such as corn, cassava and the like to prepare lactic acid through fermentation, polymerizing the lactic acid to form polylactic acid and spinning. The polylactic acid fiber can be degraded to generate lactic acid in soil, especially under the conditions of high temperature and humidity through the action of microorganisms, and is finally metabolized to water and carbon dioxide, so that the polylactic acid fiber has good biodegradability. PHBV (poly (hydroxybutryate-co-hydroxybutyrate)) is a copolymer of 3-hydroxybutyrate and 3-hydroxyvalerate, is a biological material prepared from starch and the like by a microbial fermentation technology, is produced by bacteria, can be digested by the bacteria, and can be completely decomposed into carbon dioxide, water and biomass under the condition of soil or composting. PHBV has the defects of high crystallinity, low crystallization rate, poor thermal stability, frangibility, easy degradation during processing and the like, and greatly limits the popularization and application of PHBV. At present, PLA and PHBV are mainly blended and modified as fiber materials, for example, the cellulose fibers produced by Nanjing cellulose age antibacterial materials science and technology Limited company are the blended filaments of PLA and PHBV (the ratio of PLA/PHBV is 70/30), so that the fiber materials have biodegradability and improve the mechanical properties and spinnability to a certain extent.

Although the biodegradable polyester fibers such as PLA, PLA/PHBV and the like are the same as polyester fibers of Polyester (PET), the structure and the performance of the biodegradable polyester fibers are different, and the inventor finds that the breaking strength and the twisting strength of yarns with the same number of counts, such as PLA, PLA/PHBV and the like, are lower than those of conventional polyester yarns in sample research, and the biodegradable polyester fibers are difficult to adapt to the preparation process of the chenille yarns. Particularly, the core wire bears large tensile force and twisting force in the chenille yarn twisting process, and when biodegradable yarns such as PLA, PLA/PHBV and the like are used as the core wire, the core wire is easy to break in the yarn twisting process to influence the yarn twisting efficiency, and even the production cannot be finished. The inventor finds in further research that the appropriate pretreatment can improve the mechanical properties of biodegradable polyester fibers such as PLA, PLA/PHBV and the like; and the degradation speed of the blended yarn of the common terylene, PLA and PHBV fibers is obviously higher than that of the pure terylene yarn when the blended yarn is placed in the activated sludge. Therefore, the pretreatment process of using the biodegradable polyester fibers such as PLA, PLA/PHBV and the like as the core wire and the proper blending ratio of the biodegradable polyester fibers and terylene are further researched and optimized, and the preparation method of the chenille yarn using the biodegradable polyester fibers as the core wire is developed.

Disclosure of Invention

The invention mainly provides a preparation method of chenille yarn with biodegradable polyester fiber as a core wire, which solves the problem that the traditional polyester chenille yarn is difficult to degrade after being discarded and has great influence on the environment.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for preparing chenille yarn using biodegradable polyester fiber as core wire includes such steps as inputting raw yarn of biodegradable polyester fiber into core wire by chenille twister, inputting raw yarn and down yarn by network yarn or biodegradable polyester fiber, winding the down yarn on cutting distance piece by turning head, fixing the length of down hair by holding it by roller axle, cutting to become two pieces by blade at outlet, arranging down yarns to be clamped by two groups of core wires, and rotating the two pieces of down hair to become rod-shaped fluffy yarn by twisting reverse spindles.

In the technical scheme, the PLA and the cellulose fiber are pretreated aiming at the problems that the strength is insufficient when the biodegradable polyester fiber is simply used as a core wire in the chenille yarn twisting process, and the PLA and the cellulose fiber are easy to break and cannot be stably produced. The method specifically adopts a heat setting box for preheating treatment, and is beneficial to adjusting the crystallinity and the orientation degree of macromolecules in the fiber through proper preheating treatment, so that the internal structure of the fiber is more perfect, the fiber is endowed with higher deformation resistance and strength, and the method can be more suitable for the requirement that the core wire bears larger tension.

As a preferable scheme of the invention, the yarn of the biodegradable polyester fiber comprises PLA yarn or blended yarn of terylene and PLA/PHBV.

As a preferable scheme of the invention, the PLA/PHBV is cellulose with a PLA/PHBV ratio of 70/30.

In a preferred embodiment of the present invention, the pretreatment is a preheating treatment using a heat setting box.

As a preferable scheme of the invention, the heat treatment temperature of the PLA yarn is 110-120 ℃, and the time is 5-20 min.

As a preferable scheme of the invention, the heat treatment temperature of the PLA/PHBV is 100-110 ℃, and the time is 5-20 min.

As a preferable scheme of the invention, when the yarn of the biodegradable polyester fiber is blended yarn of terylene and PLA/PHBV, 2 pieces of 32SPLA/PHBV are twisted in a plying way, the twist is set to be 32-35 twist/10 cm, 16SPLA/PHBV plied yarns are prepared, and then 16S terylene short fibers are matched to prepare the core wire.

In the technical scheme, the strength of the yarn is improved by increasing the number of the yarn, the wear resistance of the twisted yarn is improved, and the twisted yarn is favorable for meeting the requirement that the twisted yarn is used as a chenille core wire to bear larger tension.

As a preferable aspect of the present invention, when the yarn of the biodegradable polyester fiber is a PLA yarn, two or more PLA fibers are tried to be combined and twisted.

In a preferable embodiment of the present invention, the width of the pitch piece is 7 to 15 mm.

In a preferred embodiment of the present invention, the chenille twister has parameters set to satisfy D/T of 2 to 6, where D is density of the pile yarn and T is twist of the snow yarn.

In the technical scheme, the setting principle of the parameters of the chenille yarn twisting machine should meet the requirement that the D/T is 2-6, so that the pile yarns are arranged neatly and uniformly, and when the yarns containing PLA and cellulose fibers are used as chenille core yarns, the D/T is properly smaller than that when traditional polyester fibers are used as chenille core yarns because the PLA has higher thermal shrinkage rate.

Compared with the prior art, the invention has the beneficial effects that:

the core wire of the invention adopts biodegradable polyester fiber which can be completely biodegraded under proper conditions, and when the product is positioned at the end of the life cycle, the core wire can be rapidly decomposed along with the enzymolysis of microorganisms in soil and the organization of the chenille yarn.

Drawings

FIG. 1 is a structural view of a conventional chenille yarn;

FIG. 2 is a schematic view of a chenille yarn production apparatus of the present invention;

FIG. 3 is a side view of the chenille yarn producing apparatus of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 and 2, this example provides chenille yarn preparation with pure PLA fibers as the core:

(1) pretreatment: the method is used for pretreating the PLA fiber, and aims to solve the problem that the PLA which is purchased is easy to break and cannot be stably produced when being directly used as a core wire in the chenille yarn twisting process. Specifically, a heat setting box is adopted for carrying out preheating treatment, the heat treatment temperature of the PLA fiber is 120 ℃, and the time is 10 min.

(2) And (3) combining and twisting: two 150D/96F PLA filaments are combined and twisted, the twist is set to be 32-35 twist/10 cm, a 16S PLA fiber folded yarn is prepared, the strength of the yarn can be improved by increasing the number of the yarn, and the abrasion resistance of the twisted yarn is improved, so that the twisted yarn can be used as a chenille yarn later.

(3) A spinning process: chenille yarn was produced using a chenille twister, and a core yarn and a pile yarn were fed at predetermined positions, and a cut piece having a width of 8.8mm was selected. Assuming that D is the density (root/cm) of the pile yarn and T is the twist (twist/10 cm) of the snow yarn, the yarn twisting machine parameter setting principle should be satisfied such that D/T is 2 to 6 to make the pile yarn aligned uniformly, and when the yarn of pure PLA is used as the chenille core yarn, the yarn has a higher thermal shrinkage rate, and when D/T is appropriately smaller than when polyester is used as the chenille core yarn, D/T may be generally 4.

Example 2

As shown in fig. 1 and 2, the present example provides a chenille yarn preparation using a dacron/cellulose fiber blended yarn as a core:

the grain element means: PLA/PHBV blended staple fiber produced by Nanjing Povidum-time antibacterial materials science and technology Limited company, the PLA/PHBV ratio is 70/30, the trade name is standing grain, and the standing grain mentioned in the invention refers to the fiber.

(1) Pretreatment: preheating treatment is carried out by adopting a heat setting box, wherein the heat treatment temperature for the cellulose fibers is 105 ℃, and the time is 10 min. The pre-heat treatment improves the mechanical properties of the cellulose fibers, but it is still difficult to achieve the requirements for use as chenille core.

(2) And (3) combining and twisting: 2 pieces of 32S cellulose staple fibers are twisted, the twist degree is set to be 32-35 twist/10 cm, 16S terylene/cellulose fiber folded yarn is prepared, and the 16S terylene/cellulose fiber folded yarn is combined with 16S common terylene staple fibers in a ratio of 1:1, so that the strength requirement of chenille core wires is completely met.

(3) A spinning process: chenille yarn was produced using a chenille twister, and a core yarn and a pile yarn were fed at predetermined positions, and a cut piece having a width of 8.8mm was selected. Let D be the density (root/cm) of the pile yarn, T be the twist (twist/10 cm) of the snow yarn, use the yarn containing cellulose fiber as the core wire of chenille, D/T is 6, make the pile yarn arrange neatly and evenly

In the embodiment, the core wire adopts the terylene/cellulose acetate (50/50) blended yarn, the cellulose acetate can be completely biodegraded under a proper condition, and the oligomer generated by degradation of PLA and PHBV can accelerate the decomposition of polyester macromolecule ester bonds, so when the product is positioned at the end of the life cycle, the cellulose acetate fiber in the core wire can be enzymolyzed by microorganisms in soil, and the chenille yarn tissue can also be rapidly decomposed.

Example 3

As shown in fig. 1 and 2, this example provides chenille yarn preparation with pure PLA fibers as the core:

(1) pretreatment: the method is used for pretreating the PLA fiber, and aims to solve the problem that the PLA which is purchased is easy to break and cannot be stably produced when being directly used as a core wire in the chenille yarn twisting process. Specifically, a heat setting box is adopted for carrying out preheating treatment, the heat treatment temperature of the PLA fiber is 110 ℃, and the time is 20 min.

(2) And (3) combining and twisting: 4 150D/96F PLA filaments are combined and twisted, the twist is set to be 32-35 twist/10 cm, a 16S PLA fiber folded yarn is prepared, the strength of the yarn can be improved by increasing the number of the yarn, and the abrasion resistance of the yarn after twisting is improved, so that the yarn can be used as a chenille yarn later.

(3) A spinning process: chenille yarn was produced using a chenille twister, and a 15mm wide cut piece was selected by feeding a core yarn and a pile yarn at predetermined positions. Let D be the density (root/cm) of the pile yarn, T be the twist (twist/10 cm) of snow yarn, chenille yarn twister parameter setting principle should satisfy make D/T2 ~ 6 make pile yarn arrange neatly even, use pure PLA yarn as chenille heart yearn have higher heat shrinkage factor, compare when using dacron as chenille heart yearn, D/T suitably is slightly littleer, D/T generally can be 2.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.