CN112981631A

CN112981631A - Heating and twisting method for cashmere yarns

Info

Publication number: CN112981631A
Application number: CN202110154435.1A
Authority: CN
Inventors: 金光; 任斌; 徐媛媛; 陈文浩
Original assignee: Ningbo Kangsaini Textile Product Co ltd
Current assignee: Ningbo Kangsaini Textile Product Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-06-18

Abstract

The invention discloses a heating and twisting method of cashmere yarns, which relates to the technical field of textiles and comprises the following steps: step A: untwisting the cashmere yarns, namely untwisting the fibers of the ends of the cashmere yarns in a spiral mode; and B: combining the untwisted fiber strands in a mutually overlapping manner; and C: heating the spliced block to at least 60 ℃; step D: and (3) passing the fiber strand through the twisting block under at least 3 standard atmospheric pressures, wherein the twisting time is not less than 25 ms. Compared with the prior art, the animal fiber twisting machine has the advantages that the animal fiber is twisted by the high-temperature and high-pressure technology, the twisting success rate is improved, the twisting joint is smoother, and the problem that the knot or yarn thickening is easy to occur in the conventional animal fiber twisting is solved.

Description

Heating and twisting method for cashmere yarns

Technical Field

The invention relates to the technical field of spinning, in particular to a twisting technology.

Background

As is known, a yarn is a fibre assembly in the longitudinal direction, the best idea being that a thread can be made into a bobbin and a thread into a garment. This is not achieved, however, in view of the capacity of the process steps in the production process, the continuous stability of the fibre quality, etc. The yarn length of 1kg bobbin is about 28600 m, but the maximum capacity of the process steps such as spinning and carding is 3000 m, so that more than 20 single yarn joints exist in 1 bobbin yarn in different degrees, and occasionally, the individual yarn joints also exist in individual bobbin yarns. For this we do twisting to solve the yarn connection problem. The twisting process comprises three steps of untwisting, merging and twisting, according to normal thinking, the fiber fineness of the twisting position is 2 times of that of normal single yarn fiber, the twisting position is thicker, and the twisting position is embodied as that of a cloth piece, namely that a joint appears. When the yarn is woven into clothes, the joints are reflected to different degrees, and the quality of the joints, the firmness of the joints and even the size of the joints are important basis for finally measuring the quality of the yarn, the quality and the like.

Disclosure of Invention

The invention provides a heating and twisting method of cashmere yarns, aiming at the defects in the prior art, the animal fibers are twisted by a high-temperature and high-pressure technology, so that the success rate of twisting is improved, the twisting part is smoother, and the problem that the animal fibers are easy to be knotted or yarns are thickened in the conventional animal fiber twisting process is solved.

In order to solve the technical problem, the invention is solved by the following technical scheme: a heating and twisting method for cashmere yarns comprises the following steps: step A: untwisting the cashmere yarns, namely untwisting the fibers of the ends of the cashmere yarns in a spiral mode; and B: combining the untwisted fiber strands in a mutually overlapping manner; and C: heating the spliced block to at least 60 ℃; step D: and (3) passing the fiber strand through the twisting block under at least 3 standard atmospheric pressures, wherein the twisting time is not less than 25 ms.

Preferably, in the above technical solution, in the step C, the spliced block is heated to 85 ℃.

Preferably, in the above technical solution, in the step D, the fiber strand passes through the twisting block under 5 standard atmospheric pressures.

Preferably, in the above technical scheme, in the step C, the spliced block is heated to not more than 99 ℃.

In the hot twisting technique in the present application, untwisting and doubling are the same as those of the normal twisting technique, and the difference from the prior art is that in the process of twisting again, the yarn is twisted again by passing through a twisting block at about 85 ℃ and adding about 5kg of atmospheric pressure. Because the crimp nature that has to animal fiber itself, the direct many cases of splicing can be because the fibre is not directly spliced the effect not good, just appear phenomenons such as big joint on the last yarn, and the similar dyeing in-process of heat thought in this application makes the fibre fully stretch out, straighten under high temperature, and the splicing process is also more smooth and easy, and the splicing effect is also better.

Compared with the prior art, the animal fiber twisting machine has the advantages that the animal fiber is twisted by the high-temperature and high-pressure technology, the twisting success rate is improved, the twisting joint is smoother, and the problem that the knot or yarn thickening is easy to occur in the conventional animal fiber twisting is solved.

Detailed Description

Example 1: a heating and twisting method for cashmere yarns comprises the following steps: step A: untwisting is carried out on the cashmere yarns, namely, the ends of the cashmere yarns finish untwisting of fibers in a spiral mode. And B: the untwisted fiber strands are combined in a superimposed manner. And C: the spliced block was heated to 60 ℃. Step D: the fiber strand is passed through the twisting block under at least 4.5 standard atmospheric pressures, the twisting time being not less than 450 ms.

Comparative example 1: a heating twisting method of cashmere yarns, which adopts a normal twisting method.

	Splicing method	Success rate of one-time splicing
			Comparative example 1	Is normal	86.8%
Example 1	Hot twist	96.5%

Table 1: comparative table of example 1 and comparative example 1

Example 2: a heating and twisting method for cashmere yarns comprises the following steps: step A: untwisting is carried out on the cashmere yarns, namely, the ends of the cashmere yarns finish untwisting of fibers in a spiral mode. And B: the untwisted fiber strands are combined in a superimposed manner. And C: the spliced block was heated to 80 ℃. Step D: the fiber strand is passed through the twisting block under at least 3.5 standard atmospheric pressures, the twisting time being not less than 400 ms.

Example 3: a heating and twisting method for cashmere yarns comprises the following steps: step A: untwisting is carried out on the cashmere yarns, namely, the ends of the cashmere yarns finish untwisting of fibers in a spiral mode. And B: the untwisted fiber strands are combined in a superimposed manner. And C: the spliced block was heated to 80 ℃. Step D: the fiber strand is passed through the twisting block under at least 5 standard atmospheric pressures, the twisting time being not less than 50 ms.

	Splicing method	Success rate of one-time splicing
			Example 2	Hot twist	93.2.8%
Example 3	Hot twist	98.45%

Table 2: comparative table between example 2 and example 3

Example 4: a heating and twisting method for cashmere yarns comprises the following steps: step A: untwisting is carried out on the cashmere yarns, namely, the ends of the cashmere yarns finish untwisting of fibers in a spiral mode. And B: the untwisted fiber strands are combined in a superimposed manner. And C: the spliced block was heated to 85 ℃. Step D: the fiber strand is passed through the twisting block under at least 5 standard atmospheric pressures, the twisting time being not less than 40 ms.

Example 5: a cashmere yarn heating and twisting method is used for twisting 250kg, 100% cashmere and 2 strands of 26 yarns, and comprises the following steps: step A: untwisting is carried out on the cashmere yarns, namely, the ends of the cashmere yarns finish untwisting of fibers in a spiral mode. And B: the untwisted fiber strands are combined in a superimposed manner. And C: the spliced block was heated to 85 ℃. Step D: the fiber strand is passed through the twisting block under at least 5 standard atmospheric pressures, the twisting time being not less than 50 ms.

Comparative example 2: a heating and twisting method for cashmere yarn is to twist 26 yarns of 250kg, 100% cashmere and 2 strands by normal splicing method.

	Number of	JR splice failure rate	Produce the cut tobacco	When in use	Working efficiency of machine table
						Example 4	250kg	4.52%	0.9kg	295min	95.68%
Comparative example 2	250kg	11.3%	1.35kg	320min	91.02%

Table 3: comparative table of example 5 and comparative example 2

Claims

1. A heating and twisting method for cashmere yarns is characterized by comprising the following steps:

step A: untwisting the cashmere yarns, namely untwisting the fibers of the ends of the cashmere yarns in a spiral mode;

and B: combining the untwisted fiber strands in a mutually overlapping manner;

and C: heating the spliced block to at least 60 ℃;

step D: and (3) passing the fiber strand through the twisting block under at least 3 standard atmospheric pressures, wherein the twisting time is not less than 25 ms.

2. The heating and twisting method for cashmere yarn according to claim 1, wherein in step C, the splicing block is heated to 85 ℃.

3. The heating twisting method for cashmere yarn according to claim 1, wherein in step D, the fiber strand is passed through the twisting block under 5 standard atmospheric pressure.

4. The heating twisting method for cashmere yarn according to claim 1, wherein in step C, the spliced block is heated not more than 99 ℃.