KR930003945B1 - Method of manufacturing surface napped fabric - Google Patents

Abstract

No content.

Description

Method of manufacturing surface napped fabric

1 is an enlarged cross-sectional view of the ultra-fine composite fibers used in the present invention.

Figure 2 is an enlarged photograph showing the cross-sectional structure of the ultra-fine composite fibers twisted by the manufacturing method of the present invention.

3 is an enlarged photograph showing a cross-sectional structure of a ultrafine composite fiber processed under a conventional general heating condition.

Figure 4 is an enlarged photograph of the surface of the woolen fabric of the present invention.

5 is an enlarged cross-sectional view of the surface napped fabric of the present invention.

The present invention relates to a method for producing a surface napped fabric made of ultra-fine composite fibers, and in particular, a bonded segmented ultra-fine composite fiber filament yarn composed of fiber-forming polyester and polyamide is processed under low temperature flammable conditions to improve segment splitting ratio. Less than 50% and then weaving, pretreatment, and buffing to improve weaving and buffing properties, and adjust the split ratio by process to complete the segmentation by general dyeing processing without special post-processing. It relates to a method for producing wool.

In general, the ultra-fine fiber fabrics have various uses such as moisture-permeable waterproof materials, down proof materials, surface woolen fabrics, cleaning wipers, artificial suede, etc., but there are many problems in spinning, dyeing, and processing. Have been received. In particular, since polyester and polyamide are incompatible polymers, the segments are separated from each other in the fiber spinning step, causing hair and trimming, and in the post-treatment step when the polymer is specifically designed to prevent trimming There is a problem that segments are not easily divided.

Therefore, in such a case, it is necessary to separate the segments by a special chemical treatment. As the chemical division method, the one-component dissolution method and the swelling division method are known.

As the one-component dissolving method, a method of dissolving and removing one component using a solvent selectively acting on a segment is known, such as a polyester dissolving method by alkali treatment, a polyamide dissolving method by organic and inorganic acids such as formic acid and hydrochloric acid.

The above methods are applied to silk-like fabrics that are flexible to the touch, but are not suitable for high density fabrics and surface napped fabrics used as moisture-permeable waterproof materials. In addition, there is a waste stage that causes loss and wastewater treatment problems due to one-component dissolution.

The swelling splitting method is a method that is widely applied to the division processing of polyester / polyamide composite fiber structure by separating the segments using the difference of swelling and shrinkage behavior of the solvents of the conjugated spun fiber-forming polymers. Since there is no weight loss, the structure is densified, economical, and wastewater treatment has a relatively small advantage, while different polymers coexist, which makes dyeing difficult.

Solvents used for swelling and processing conditions, such as USP No. 4,109,038, are applied to hollow composite fibers and are known to be divided using a difference in specific water shrinkage ratio of polyester and polyamide. Examples thereof include liquid processing by using organic solvents such as phenol, phenylethyl alcohol and benzyl alcohol, or steaming after padding, and liquid processing using ortho phenyl phenol (Japanese Patent Application Laid-Open No. 60-81,363).

However, among these methods, the hollow composite fiber has good drawability but has a high defect rate in the yarn manufacturing step, and in the case of the bonded composite fiber, yarn production is relatively easy, but there is a difficulty in splitting. In other words, if the processing to the extent that sufficient division occurs, the drug requirement is high, and wastewater treatment problems occur, but there is a disadvantage in that the process time is long and the defect rate is increased by adding a separate division process after the refining process.

In order to improve these problems, a mechanical splitting method has been attempted. For example, a method of general heat processing a composite yarn to make the separation degree 60 to 90% (Korean Patent Publication No. 89-17,419), and 180 to 205 ° C The method of high temperature flamming (Korean Patent Publication No. 90-18,438) etc. is known.

While the former method has a high degree of separation, the weaving efficiency is lowered, and the pilling part is pushed out or agglomerated when buffing, causing a pilling phenomenon. The latter method has a low buffing property due to high temperature fusion. Not suitable

The present inventors have diligently studied to solve the above problems, and as a result, by adjusting the split ratio by process on the basis of low temperature flammability processing, the weaving and buffing properties are improved, and segment segment of 90% or more in general dyeing process without special post process I found this possible.

As the fiber-forming polyester used in the production of the composite fiber of the present invention, a polyester or copolymer for fiber represented by polyethylene terephthalate (hereinafter referred to as PET) can be used, and polyamide is represented by nylon 6 or nylon 66. Any fiber forming polyamide may be used.

The combustible processing of the composite fiber is preferably 1,800 ~ 2,450 TPM at a low temperature of 130 ~ 160 ° C., which is milder than the general condition, so that the segmentation is about 20-50%.

At this time, the relationship between temperature (t) and soft water (TPM) should satisfy the following equation.

if If it exceeds 350, excessive splitting occurs or all of them are easily generated, so that maritime property and weaving property are significantly lowered, and the buffing of the buffing occurs, and the possibility of occurrence of buffing crease is high.

Also In the case of less than 290, there is a problem that the split ratio after combustion is so low that the overall defective rate after salt processing is insufficient, resulting in poor touch.

After weaving the ultra-fine composite fiber twisted by the present invention method, the splitting ratio is about 50-80% when it is called and refined by a conventional method. There is little phenomenon or buffing Chris. Buffing criss are easy to identify because they appear after pressing and appear buffing roller press marks or upper edges. Dyeing the doped fabrics increases the flexibility of the fabrics and completes 90% or more of the splitting of the composite fibers, resulting in a very soft touch with finer hairs.

Hereinafter, the present invention will be described in detail through examples.

Example 1

The ratio of volume ratio 1: 3 is obtained by using nylon 6 having a relative viscosity of 2.6 as the first component in 25 ° C and 96% sulfuric acid as the first component and PET having an intrinsic viscosity of 0.64 as the second component in 25 ° C of orochlorophenol. The melt-bonded spinning was carried out in the furnace and wound at a speed of 1,500 m / min to obtain an undrawn yarn having the same cross-sectional shape as the first degree. This was stretched three times at 130 ° C., and then heat-fixed and spun with a hot plate at 150 ° C. to obtain a multi-segmented composite fiber of 150 denier 72 filaments.

This composite fiber was combusted at 2,250 TPM at 145 DEG C to obtain a combustible composite fiber having the same cross section as the second degree. Using 75 denier 36 filament PET fibers for warp, weaving composite fiber obtained in the front of weft yarn, weaving into twill with a density of warp yarn 120 per inch and weft yarn 80 per inch, and then using a conventional relaxer in a conventional relaxer. Hobbing, scouring and presetting at 180 ° C. for 30 seconds were then buffed in a mesh buffing roller of # 220 and stained in a circular dyeing machine under the conditions of (I).

As a result of examining the weaving property, feel, flexibility, splitting ratio, peeling property, poor buffing rate, and the like of the dye cloth is shown in Table 1.

(I)

Comparative Example 1

Other conditions were carried out in the same manner as in the examples, except that the false processing conditions were set at 165 ° C and 2,450 TPM.

Comparative Example 2

The other conditions were carried out in the same manner as in the examples, except that the false processing conditions were 130 ° C. and 1,950 TPM.

Comparative Example 3

The same composite fiber as in Example was processed without splitting and then divided and processed under the conditions of (II), followed by presetting, buffing, and dyeing. Other conditions were performed similarly to the Example.

As a result of examining the dyeing fabric and weaving, touch, flexibility, splitability, poor buffing and the like according to the comparative example are shown in Table 1.

(II)

TABLE 1

(Legend)

(1) Weaving is expressed as daily output when weaving at rpm 480 in a water jet loom.

(2) The touch was judged by sensory examination of 20 non-experts.

: Very soft

Softness

: Slightly hard

(3) Flexibility is represented by drape coefficient according to JIS L 1096.

(4) Peelability was evaluated by KS K 0503 ICI box method.

(5) The buff failure rate was examined after 1000yd dyeing, buffing cris and buffing tip.

(6) The segmentation rate was observed in a weft cross section with a scanning electron microscope to indicate the number of segments in which the segments were separated relative to the total number of wefts.

Claims (2)

A method for producing a surface napped fabric comprising weaving, pretreating, buffing and dyeing a spliced ultrafine composite fiber filament composed of fiber-forming polyester and polyamide under low temperature flammability processing under the following conditions. 130 ° C. ≦ t ≦ 160 ° C. … … … … … … … … … … … … … … … … … … … … … (One) 1,800 ≦ TPM ≦ 2,450 … … … … … … … … … … … … … … … … … … … (2) … … … … … … … … … … … … … … … … … … … (3) Where t is the flammable temperature and TPM is the flammable soft water. 2. The method of claim 1, wherein the yarn has a composite fiber split ratio of 20 to 50% after burning.