KR100537254B1 - Nylon hollow fiber of potential crimp - Google Patents

Abstract

The present invention relates to a nylon hollow latent crimp yarn having light weight and latent crimping, which is prepared by thermally stretching after complex spinning through a spinneret for forming hollows of two polymers having different shrinkage rates. It is a nylon hollow latent yarn in which filament becomes coil in the heat treatment process of the post process and can express lightness and elasticity at the same time.

Description

Nylon hollow fiber of potential crimp}

The present invention relates to a nylon hollow latent yarn, which is lightweight and excellent in elasticity, and more specifically, composite polymers having a hollow cross section (see FIG. 1) by passing two polymers having different shrinkage rates through a spinneret having a hollow cross section. do.

Thus, the present invention relates to a nylon hollow latent yarn in which spontaneous crimping occurs when heat-stretching the spun partially drawn yarn thus heat-treated.

Conventionally, a number of techniques for complex spinning using two different polymers have been introduced, but among them, nylon and polyester (JP 2-91244), nylon and polyurethane (JP 2-53925, Japan special) Pyeong 3-220301), such as the problem of disproportionation due to staining difference, as well as the lack of compatibility, the crimp characteristics are weakened.

The dyeing unevenness and lack of compatibility due to the difference in the constituent polymer can be solved by forming the cross-section of the in situ polymer.

In many cases, high viscosity and low viscosity polymers are used to maintain the crimping characteristics while solving the above problems, but there is a problem in that spinning occurs on the nozzle surface, thereby degrading spinning workability.

In order to solve this howling problem, an invention (Korean Patent Registration No. 0170067) has been attempted to avoid the howling phenomenon by specially manufacturing a distribution plate and spinnerets, but it is troublesome to manufacture and construct.

However, if it is composed of in-situ polymer but the in-situ copolymer is a high shrink part and the general polymer is a low shrink part, there is no problem of dyeing difference or compatibility between the two components and it has excellent crimp characteristics. 26612, Japan Post Office 61-289125)

The trend of compounding the function according to the market demand also applies to the case of latent crimping, and a patent for a method of manufacturing fibers having elasticity as well as light weight is proposed in US Patents 334,420 and PCT / US94 / 13012.

However, the method is limited to the use of the spun yarn, insufficient to express the high elasticity required in general fabrics, etc. There is a problem to improve the spinning workability to produce a filament.

Therefore, the present invention solves the problems of the prior art, the present invention aims to provide a nylon hollow latent weeding yarn that is stable in spinning workability and excellent in both light weight and crimping properties.

The present invention is a composite spinning using a nylon 6 and nylon 66 copolymerized nylon 6 and nylon 6 and a general nylon 6, but the spinneret is hollow and the polymer weight ratio of the first component to 40 ~ 60wt% more than 3000m / min The present invention relates to a nylon hollow latent yarn manufactured by winding after spinning at a radial speed.

The nylon high shrink copolymer and general nylon is 96% sulfuric acid relative viscosity difference is within 0.2 and the non-shrinkage difference is more than 10%.

In addition, the nylon hollow latent yarn of the present invention is manufactured from four-leaf hollow spinnerets.

Two kinds of nylon polymers having different shrinkage rates used in the present invention have no problem in compatibility with each other, and one component of the polymer exhibits high shrinkage characteristics. Specifically, the first component is a copolymerized nylon that exhibits high shrinkage. The relative viscosity is 2.5 to 3.20, the specific shrinkage is 18 to 26%, the second component is general nylon, and the relative viscosity of sulfuric acid is 2.4 to 3.05 and the specific shrinkage is 6 to 9%.

In addition, copolymerized nylon showing high shrinkage is composed of nylon 66 and nylon 6, the weight ratio of nylon 66 is 60 ~ 80wt%.

In addition, spinnerets having four slit numbers of nozzles were used as shown in FIG. 2 to obtain a hollow ratio of 20% or more.

The following is a measurement method for the hollow ratio, crimp ratio, and elastic modulus, which are items for evaluating the lightness and crimpability of the Examples and Comparative Examples.

1. Hollow rate

Calculated as the ratio of the cross-sectional area of the hollow part to the total cross-sectional area of the hollow filament.

Where d is the diameter of the hollow portion and D is the total diameter of the filament.

2. Crimp rate

Wind up three times in warprill to make a skein.

Immediately after making the skein, non-water treatment is carried out for 30 minutes, followed by hot air drying at a temperature of 60 ° C for 30 minutes.

1/10 (g / d) is applied to the dehydrated sample for 2 minutes and then relaxed for 10 minutes or more.

After 1/500 (g / d) load was applied to this sample for 2 minutes, the length (a) was measured. Then, 1/10 (g / d) load was applied for 2 more minutes, and the length (b) was measured. Measure and remove the load. After applying a load of 1/500 (g / d) for 2 minutes, measure the length (c) and calculate the crimp rate by the following equation.

3. Elastic modulus

Follow the measurement method of 1 above, but calculate the elastic modulus by the following equation.

The present invention is not limited by the following examples in order to explain the present invention in detail.

Example 1

The first component is randomly co-polymerized so that the weight ratio of nylon 66 and nylon 6 is 70:30, and the compound is spun with high shrinkage nylon of 96% sulfuric acid relative viscosity of 2.60 and general nylon 6 of sulfuric acid relative viscosity of 2.47.

At this time, the non-shrinkage rate of high shrinkage nylon is 20% (when radiating with homopolymer, fully stretched yarn (FDY)), and the non-shrinkage rate of general nylon 6 is 8% (when radiating with homopolymer, FDY).

The composite ratio is 1: 1 and passes through the spinneret having a cross section as shown in FIG.

The polymer discharged through the spinneret having four lobes was wound at a speed of 4,300 m / min to make a partially aligned yarn (POY) of 100 denier 24 filaments, followed by thermal stretching to prepare a stretched yarn of 75 denier 24 filaments. The characteristics of the nylon latent stalls thus obtained are shown in Table 1.

Example 2

The first component is a high shrinkage nylon (non-shrinkage rate of 24%) of 3.18 random copolymerization of the weight ratio of nylon 66 and nylon 6 to 65:35, and the second component is a general nylon 6 (non-shrinkage) of 3.08 It is the same as Example 1 except having made shrinkage rate 8%).

Example 3

Same as Example 2 except that the first component was made of general nylon, the second component was made of high shrinkage nylon, and the compound ratio was 4: 6.

Comparative Example 1

Same as Example 1 except that the first component was made of low viscosity general nylon (relative viscosity of sulfuric acid 2.47) and the second component was made of high viscosity general nylon (relative viscosity of sulfuric acid 3.08).

Comparative Example 2

It is the same as Comparative Example 1 except that the first component is a low viscosity general nylon (relative viscosity of sulfuric acid 2.47) and the second component is a high viscosity high shrinkage nylon (relative viscosity of sulfuric acid 3.18).

Comparative Example 3

It is the same as that of Example 1 except having a compound ratio of 2: 8, and making a 1st component into high shrink nylon (relative viscosity of sulfuric acid 3.10), and making a 2nd component into general nylon (relative viscosity of sulfuric acid 3.08).

Comparative Example 4

It is the same as Example 1 except having used 3-leaf spinneret.

TABLE 1

Compound ratio Radioactive Modulus Crimp rate Hollow factor Example 1 5: 5 ○ 70.8 45.4 21 Example 2 5: 5 ○ 71.3 42.1 25 Example 3 4: 6 △ 67.5 44.2 23 Comparative Example 1 5: 5 △ 65.3 7.2 18 Comparative Example 2 5: 5 × - - - Comparative Example 3 2: 8 ○ 54.1 28.4 22 Comparative Example 4 5: 5 △ 68.0 43.2 15

However, the composite ratio is the discharge weight ratio of the first component and the second component and the evaluation on the radioactivity is as follows.

○:  Good (less than one trimester / day) △:  Normal (Embossed 1-3 times / day) ×:  Poor (more than 3 times / day)

Nylon hollow latent crimping yarn according to the present invention is excellent in elastic modulus, crimp rate and hollow rate and can be produced good spinning workability.

1 is a cross-sectional view of a nylon hollow latent yarn according to an embodiment of the present invention.

Figure 2 is an enlarged cross-sectional view of the spinneret for producing latent crimping yarn according to the present invention.

Figure 3 is an enlarged longitudinal cross-sectional view of the distribution plate and spinneret for producing a potential crimp yarn according to the present invention.

Claims (3)

The first component is a nylon high shrink copolymer copolymerized with nylon 6 and nylon 66, the second component is a general nylon, and the two components having a weight ratio of 40 to 60 wt% of the first component are hollow spinnerets of more than 3000 m / min. Nylon hollow latent stalls, characterized in that manufactured by winding at a speed and hot drawn. 2. The nylon hollow latex stall according to claim 1, wherein the nylon high shrink copolymer and the general nylon have a 96% sulfuric acid relative viscosity difference within 0.2 and a non-shrinkage difference of 10% or more. 2. The nylon hollow latent livestock according to claim 1, wherein the hollow spinneret is a four-leaf hollow spinneret.