阅读说明：本技术 一种提升pla纤维成条抱合力的工艺 (Process for improving cohesive force of PLA fiber in slivering ) 是由 许梦国 李煜炜 王慧云 曹家辉 周其兵 张敏 于 2019-10-15 设计创作，主要内容包括：本发明提供了一种提升PLA纤维成条抱合力的工艺,包括以下步骤：1)增加纤维的抗静电能力,改善纤维之间的抱合力：在纤维中加入抗静电剂、防滑剂,静电剂：防滑剂：水＝1:1.5:15,间温度控制在25±3℃,相对湿度控制在75±5％；2)增大隔距减少对纤维的破坏：①喂入罗拉隔距为19mm,②胸锡林与转移滚隔距为21mm,③锡林与道夫隔距为12mm,④剥毛棍与工作辊隔距为18-20mm。本发明提供的一种提升PLA纤维成条抱合力的工艺,解决了聚乳酸纤维(PLA)在梳理过程中胸锡林、转移辊、剥毛辊绕毛的现象,解决了毛网成型不好、中间有破洞的现象以及毛条不匀率高、毛粒、棉结严重的现象。(The invention provides a process for improving the stranding cohesive force of PLA fibers, which comprises the following steps: 1) the antistatic capacity of the fiber is increased, and the cohesive force between the fibers is improved: adding an antistatic agent and an antiskid agent into the fiber, wherein the antistatic agent comprises the following components in percentage by weight: an anti-slip agent: water is 1:1.5:15, the intermediate temperature is controlled at 25 +/-3 ℃, and the relative humidity is controlled at 75 +/-5%; 2) increasing gauge reduces damage to the fibers: the distance between a feeding roller and a transfer roller is 19mm, the distance between a chest cylinder and the transfer roller is 21mm, the distance between the cylinder and a doffer is 12mm, and the distance between a hair removing stick and a working roller is 18-20 mm. The process for improving the stranding cohesive force of the PLA fibers solves the problem that a chest cylinder, a transfer roller and a wool stripping roller wind wool in the carding process of the PLA fibers, and solves the problems that a wool net is not well formed, holes are formed in the middle of the wool net, and wool tops are high in unevenness and serious in wool granules and neps.)

1. A technology for improving the stranding cohesive force of PLA fibers is characterized by comprising the following steps:

1) the antistatic capacity of the fiber is increased, and the cohesive force between the fibers is improved: adding an antistatic agent and an antiskid agent into the fiber, wherein the antistatic agent comprises the following components in percentage by weight: an anti-slip agent: water is 1:1.5:15, the intermediate temperature is controlled at 25 +/-3 ℃, and the relative humidity is controlled at 75 +/-5%;

2) increasing gauge reduces damage to the fibers:

firstly, the feed roller gauge is 19mm,

secondly, the distance between the breast cylinder and the transfer roller is 21mm,

the distance between the cylinder and the doffer is 12mm,

the distance between the hair removing stick and the working roll is 18-20 mm;

3) reduce the dynamics of combing, reduce the speed of a motor vehicle, change the card clothing:

the speed of the vehicle is 17m/min,

the 22# -24# card clothing is used for the card clothing of the cylinder, the doffer, the working roll, the transfer roll and the wool stripping roll.

2. The process for improving the cohesion of the PLA fiber in the filament according to claim 1, wherein the anti-slip agent is silicone oil.

Technical Field

The invention belongs to a process for spinning polylactic acid fiber (PLA) by a carding machine, and improves the cohesive force of the PLA and the spinnability of carding by the carding machine.

Background

Polylactic acid fiber (PLA) has high mass specific resistance, has a lot of adverse effects on spinning due to electrostatic effect in production, is poor in hygroscopicity and high in moisture regain, is easy to generate static electricity, and is not beneficial to production and processing. During the spinning process, the spinning device is very sensitive to the change of temperature and humidity. The appearance is straight and smooth, the fluffiness is large, the net forming is difficult, in order to improve the spinnability of polylactic acid fiber (PLA), the spinning process needs to be started, the physical and mechanical properties of the fiber are improved, and certain technical measures are adopted, so that the spinning production can be smoothly carried out.

Polylactic acid (PLA) fibers are difficult to card into slivers in a carding process, but the process is particularly critical. The moisture regain control and the oil, water and electrostatic agent proportion control are difficult. The chest cylinder, the transfer roller and the wool stripping roller of the wool comber with excessively high moisture regain have serious wool winding. Due to poor cohesive force and large fluffiness of polylactic acid fiber (PLA), poor forming of a woolen net and a woolen top, the polylactic acid fiber (PLA) is greatly damaged in the carding process. Directly affecting the quality of the subsequent finished product. Polylactic acid fibers (PLA) therefore have the following points during carding: 1. in the carding process of polylactic acid (PLA), the winding of the breast cylinder, the transfer roller and the wool stripping roller is serious. 2. The forming of the net is not good, and the middle hole is broken seriously. 3. High unevenness of wool top, serious wool grain and neps.

Disclosure of Invention

The invention aims to provide a process for improving the stranding cohesive force of polylactic acid (PLA) fibers, which solves the problems that polylactic acid (PLA) fibers are sufficiently carded and are not easy to wind, the antistatic capability of the PLA fibers is improved, and the cohesive force is increased. The quality of the polylactic acid (PLA) fiber slivering and carding woolen net is improved.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

1. a process for improving the stranding cohesive force of PLA fibers comprises the following steps:

1) the antistatic capacity of the fiber is increased, and the cohesive force between the fibers is improved: adding an antistatic agent and an antiskid agent into the fiber, wherein the antistatic agent comprises the following components in percentage by weight: an anti-slip agent: water is 1:1.5:15, the intermediate temperature is controlled at 25 +/-3 ℃, and the relative humidity is controlled at 75 +/-5%;

2) increasing gauge reduces damage to the fibers:

firstly, the feed roller gauge is 19mm,

secondly, the distance between the breast cylinder and the transfer roller is 21mm,

the distance between the cylinder and the doffer is 12mm,

the distance between the hair removing stick and the working roll is 18-20 mm;

3) reduce the dynamics of combing, reduce the speed of a motor vehicle, change the card clothing:

the speed of the vehicle is 17m/min,

the 22# -24# card clothing is used for the card clothing of the cylinder, the doffer, the working roll, the transfer roll and the wool stripping roll.

As an improvement, the anti-slip agent is silicone oil.

The invention has the beneficial effects that:

the invention solves the problem that the polylactic acid fiber (PLA) winds the wool in the carding process, such as chest cylinder, transfer roller and wool stripping roller, and solves the problems of poor wool net forming, hole breaking in the middle, high wool top unevenness and serious wool grain and nep.

Drawings

FIG. 1 is a diagram showing the working states of a breast cylinder, a transfer roller and a wool stripping roller in the prior art polylactic acid fiber carding process;

FIG. 2 is a diagram showing the working states of a breast cylinder, a transfer roller and a wool stripping roller in the carding process of polylactic acid fibers;

FIG. 3 shows the forming of polylactic acid fiber web in the prior art;

FIG. 4 is a diagram showing the formation of a polylactic acid fiber web according to the present invention;

FIG. 5 is a diagram of the forming of polylactic acid fiber wool top in the prior art;

FIG. 6 is a view showing the formation of the polylactic acid fiber tops according to the present invention.

Detailed Description

The invention is illustrated below by means of specific examples, without being restricted thereto.