TWI542746B - High moisture absorption nylon composite fiber and fabric thereof - Google Patents

Description

High moisture absorption and heat resistant composite fiber and fabric thereof

This invention relates to a composite fiber and a fabric thereof.

Existing two-component composite fibers have been difficult to make new breakthroughs to improve existing functions or to present new functions such as higher elasticity, better moisture absorption and moisture release rate or better fiber strength. These improvements or new functions are usually derived from the special materials used in the two-component composite fiber.

Accordingly, one aspect of the present invention is to provide a high moisture absorbing nylon composite fiber. The above-mentioned high moisture-absorbing and heat-resistant composite fiber comprises a side-by-side fiber or an eccentric core-sheath type fiber composed of a first endurance fiber and a second endurance fiber.

The first endurance fiber comprises a first polyamine which is polymerized from a linear aliphatic diamine of m carbons and a first linear aliphatic dicarboxylic acid having n carbons, wherein the value of (n-2) Is an integer multiple of the (m-2) value.

The above second nylon fiber, which comprises caprolactam, polyethyl b a second polyamine compound obtained by copolymerizing an ether diamine and a second linear aliphatic dicarboxylic acid, the second linear aliphatic dicarboxylic acid having 6 to 12 carbons.

According to an embodiment of the invention, the first polyamine is london 6.6, carbamide 6.10, carbamide 6.14 or carbamide 10.10.

According to another embodiment of the present invention, the weight ratio of the first polyamine to the second polyamide is 40:60 to 60:40.

According to still another embodiment of the present invention, the above high moisture absorption resistant composite fiber has a spiral crimp.

In another aspect, the present invention provides an endurance fabric comprising the high moisture absorption resistant composite fiber of any of the above.

The Summary of the Invention is intended to provide a simplified summary of the present disclosure in order to provide a basic understanding of the disclosure. This Summary is not an extensive overview of the disclosure, and is not intended to be an The basic spirit and other objects of the present invention, as well as the technical means and implementation aspects of the present invention, can be readily understood by those of ordinary skill in the art.

According to the above, a high moisture absorbing nylon composite fiber and a fabric thereof are provided. In order to facilitate an understanding of the described embodiments, a number of technical details are provided below. Of course, not all embodiments require these techniques. Section. In the meantime, some well-known structures or elements are only shown in the drawings in a schematic manner to appropriately simplify the drawing.

High moisture absorption and heat resistant composite fiber

The high moisture absorbing nylon composite fiber comprises a side-by-side fiber or an eccentric core-sheath fiber composed of a first nylon fiber and a second nylon fiber.

The composition of the first nylon fiber comprises a first polyamide having a long fatty carbon chain. Since the first nylon fiber can be sufficiently extended to crystallize the long fatty carbon chain of the first polyamide, the first nylon fiber has better dimensional stability. That is, the first nylon fiber has a lower residual internal stress and boiling water shrinkage.

The composition of the second nylon fiber comprises a second polyamine having a polyether segment. Since the polyethyl ether segment of the second polyamide is relatively soft, even if the second nylon fiber is stretched, the irregularly arranged molecules are arranged in a forward direction, and it is difficult to allow the aligned molecular segments to be incorporated into the crystal lattice. Crystallization occurs. Therefore, the fiber retains high residual internal stress and boiling. In addition, since the second nylon fiber contains a polyether segment, the hygroscopicity of the second nylon fiber can be increased, and the resulting nylon fiber has high hygroscopicity.

Therefore, the Nylon composite fiber composed of the first Nylon fiber and the second Nylon fiber may be subjected to tension stretching, heat treatment (for example, treatment with waste water) or both treatments, because the first Nylon fiber and The different dimensional stability of the second nylon fiber produces a spiral curl, thereby providing fiber A certain extension length required for dimensional stretching. Therefore, after extending the nylon-resistant composite fiber, the second nylon fiber having a polyether segment can assist the nylon fiber to return to the original length, and the first nylon fiber containing the long fat carbon chain can help stabilize the resistance. The degree of curl of the composite fiber. Therefore, the endurance fabric formed using the above-mentioned nylon-resistant composite fiber can have durability that is durable.

The first polyamine is polymerized by a linear aliphatic diamine having m carbons and a first linear aliphatic dicarboxylic acid having n carbons. In order to make the first polyamide having better crystallinity, the value of (n-2) is preferably an integral multiple of the value of (m-2). For example, the first polyamine can be Nylon 6.6, Nylon 6.10, Nylon 6.14 or Nylon 10.10.

The second polyamine is obtained by copolymerization of lactam, polyethyleneoxy diamine and a second linear aliphatic dicarboxylic acid. The mesaconamine may have, for example, 6 carbons. The polyether diamine has an average molecular weight of about 400 to 5,000, and may be, for example, 400, 700, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500 or 5000. The second linear aliphatic dicarboxylic acid may have, for example, 6 to 12 carbons. The polyethylenic diamine is added in an amount of from 3 to 20% by weight, for example, from 5 to 12% by weight, based on the total amount of the monomers to which the second polyamine is added. For example, the polyether diamine may be added in an amount of 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12 wt%.

The above-mentioned nylon-clad composite fiber having a spiral crimp can be produced by the following method. First, the first polyamine and the second polyamine are melt-spun together to form an endurance composite fiber. Then, by using the tension to extend the obtained Nylon-resistant composite fiber, the Nylon composite fiber can be spirally curled. Next, the Nylon composite fiber can be further treated with boiling water to increase the spiral density of the Nylon composite fiber.

Example 1: Effect of the weight ratio of the first polyamine to the second polyamine on the endurance-type composite fiber

In this embodiment, different high moisture absorbing and collinear side-by-side type composite fibers were prepared by melt spinning, and the influence of the weight ratio of the first polyamide to the second polyamide on the lonlon side-by-side composite fiber was investigated.

In Experimental Example 1-3, the first polyamine was Nylon 6.10, and the second polyamine was copolymerized from caprolactam, polyether diamine and adipic acid. The addition amount and average molecular weight of the polyether diamine were 8 wt% and 2000, respectively. The weight ratio of the first polyamine to the second polyamide in Experimental Example 1-3 was 60:40, 50:50 and 40:60, respectively, and the draw ratio at the time of spinning was 2.1. The preparation parameters of Comparative Example 1 were the same as in Experimental Example 2 except that the polymerization monomers used in the second polyamide were different. The second polyamine of Comparative Example 1 was Nylon 6 .

Next, let the relevant property data of the test site be listed in Table 1. First, the shrinkage ratio (CC) of the obtained Nylon composite fiber after heat shrinkage treatment was measured, and the obtained measurement results are shown in Table 2 below. The measurement method of the crimp ratio is as follows. The test fiber was first loaded with a load of 0.22 g/denier (ie 2 g/tex) for 10 seconds and the measured length was L1. The load was then removed from the test fibers and placed at 100 ° C for 30 minutes. Then, let the test fiber load 0.111 g/denier (ie 0.01 g/tex) for 10 minutes, measured The length is L2. Therefore, the original yarn crimping ratio is calculated by the following formula (1).

CC(%)=(L1-L2)/L1×100% (1)

Next, the Nylon composite fibers of the above Experimental Examples and Comparative Examples were knitted into individual endurance fabrics (gartens). Then, the elongation recovery ratio (%) and the moisture absorption rate (%) of the obtained lanyard sling were measured. The elongation recovery rate was measured in accordance with the measurement method of CNS 13752 L3243 6.15.1 A, and the stretching rate was 20 mm/min. The method of measuring the moisture absorption rate is described in detail below.

First, the sample was dried at 105 ° C for 2 hours, and the dry weight W1 was measured. Then, it was allowed to stand under a constant temperature and humidity environment of 20 ° C and 65% relative humidity for 24 hours, and the weight W2 was measured. The sample was allowed to stand in a constant temperature and humidity environment at 30 ° C and 90% relative humidity for 24 hours, and the weight W3 was measured. Therefore, the moisture absorption rate is calculated in the following formulas (2) to (4).

Moisture regain rate 1=[(W2-W1)/W1]×100% (2)

Moisture regain rate 2=[(W3-W1)/W1]×100% (3)

Moisture absorption rate (%) = moisture regain rate 2 - moisture regain rate 1 (4)

From the results of Table 1, it is understood that the greater the content of the second polyamine containing the polyetherdiamine segment, the greater the moisture absorption rate of the nylon fabric. The elongation recovery rate of the Nylon fabric was the best in Experimental Example 2, and the content of the first polyamide and the second polyamide was 50:50, which had the best improvement effect on the elongation recovery rate of the nylon fabric.

Experimental Example 2: Effect of Stretching Ratio on Spinning on the Endurance Parallel Composite Fiber

In this embodiment, melt-spinning was also used to prepare different high-moisture-resistant Nile-type side-by-side type composite fibers, and the influence of the stretching ratio at the time of spinning on the Nile-type side-by-side type composite fiber was investigated.

In Experimental Examples 2, 4, and 5, the first polyamine was Nylon 6.10, and the second polyamine was copolymerized from caprolactam, polyether diamine, and adipic acid. The addition amount and average molecular weight of the polyether diamine were 8 wt% and 2000, respectively, and the weight ratio of the first polyamine to the second polyamide was 50:50. The draw ratios at the time of spinning of Experimental Examples 2, 4, and 5 were 2.1, 2.6, and 3.1, respectively. The preparation parameters of Comparative Example 1 were the same as in Experimental Example 2 except that the polymerization monomers used in the second polyamide were different. The second polyamine of Comparative Example 1 was Nylon 6 .

Then, the related test of the above experimental example 1 is also performed in the same manner. The results are shown in Table 2.

It can be seen from the data in Table 2 that the stretching ratio of the Nylon material spinning has no effect on the elongation recovery rate of the Nylon fabric and the original yarn crimping rate. However, in the moisture absorption rate of the Nylon fabric, it was shown that when the stretching ratio was 2.1, it had a preferable moisture absorption rate. This result is consistent with the general cognition, that is, the higher the stretching ratio at the time of spinning, the higher the crystallization ratio of the Nylon polymer in the Nylon fiber, making it difficult for water and gas to enter and exit. Therefore, the higher the stretching ratio at the time of spinning, the lower the moisture absorption rate.

It can be seen from the above that since the first nylon fiber comprises a first polyamine having a long aliphatic carbon chain, the second nylon fiber has a second polyamine of a polyether segment, and the obtained nylon fiber is subjected to elongation treatment. After heat treatment or both, it can be spontaneously crimped to produce a helical crimp. Therefore, the crimp ratio of the obtained Nylon-resistant composite fiber and the elongation recovery ratio of the NBR fabric can be increased, and the resulting Nylon fabric has a durable stretchability. The polyether segment in the second nylon fiber can also increase the obtained nylon-resistant composite fiber and The hygroscopicity of the fabric improves the comfort of the user.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

Claims (4)

The invention relates to a high moisture absorption and anti-loning composite fiber, which comprises: a first nylon fiber, which is Nylon 6.10; and a second nylon fiber, which is composed of caprolactam, polyether diamine and The dicarboxylic acid is copolymerized, wherein the nylon-resistant composite fiber is a side-by-side fiber or an eccentric core-sheath fiber composed of the first endurance fiber and the second endurance fiber. The high moisture absorption nylon composite fiber according to claim 1, wherein the weight ratio of the first polyamide to the second polyamide is 40:60 to 60:40. The high moisture absorption nylon composite fiber according to any one of the preceding claims, wherein the high moisture absorption resistant composite fiber has a spiral curl. A high moisture absorbing woven fabric comprising the high moisture absorbing nylon composite fiber according to any one of claims 1 to 3, wherein the high moisture absorbing nylon fabric has a moisture absorption rate of 2.30% to 3.19%.