JPS63264965A - Production of soft fabric - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for producing a soft fabric with excellent flexibility and bulkiness.

BACKGROUND OF THE INVENTION Woven and knitted fabrics using synthetic fiber filament yarns are widely used in general clothing distribution due to their smooth surfaces and excellent strength properties. However, the properties characteristic of natural fibers, such as flexibility and bulk, are difficult to achieve with unprocessed synthetic fiber woven or knitted fabrics. After weaving using a composite multifilament yarn formed by joining, the composite multifilament is split into a plurality of components to give a fine warp and a soft yarn (for example, Japanese Patent Publication No. 58-856313). things are being done.

(One point while the invention is trying to solve the problem) However, high multifilament yarn is difficult to spin, and there is a limit to how much it can be spun.

In addition, in the method of using a split-type one-piece treatment, unless the combination of a plurality of polymers is taken into consideration, the usual split-one treatment will result in splitting and moat, and no improvement in the soft texture can be expected.

The present invention solves the problem of eight cut points, and aims to provide a method for producing knitted fabrics having a flexible texture and bulk using a split type AAM. .

(Means for Solving the Problems) That is, the present invention provides polyethylene terephthalate and a block polyether polyester obtained by copolymerizing polyethylene glycol with a polyethylene terephthalate component in the cross section of a single filament, so that one component does not overlap with the other component. After false-twisting composite filaments which are joined along the longitudinal direction in a shape that does not completely encompass the polyethylene terephthalate and whose fourth degree is 0.5 denier or less after splitting, fabrics are made using such multifilament yarns. It is characterized by knitting and weaving, and then fibrillating the composite filament.

The composite filament of the present invention is composed of polyethylene terephthalate and an alkali easily soluble block polyether polyester obtained by copolymerizing polyethylene glycol with the polyethylene terephthalate component, but the amount of polyethylene glycol copolymerized with the polyethylene terephthalate component is usually 5 to 50 moles. It is preferably about % by weight, and may contain a third component such as sulfoisophthalic acid. In addition, it is necessary for both components of the composite filament to be joined in the longitudinal direction in a shape in which one component does not completely encompass the other component, and specifically, as shown in Figure 1, it is necessary for fibrillation to occur. , side-by-side type (8), side-by-side repeating type a3), radially joined types (O to (E), etc., and those with hollow parts or irregular shapes in these shapes, especially 8 or more radial types) It is preferable to use a type (G) having a polyethylene terephthalate component of 0.6 denier or less after the division.
If the denier is more than 1, it will not be possible to obtain a soft texture when made into a knitted fabric.

The composite filament is then subjected to false twisting.

FIG. 2 shows an example of such a process, in which the composite filament (1) passes through the 10th wire (2) and is then heated - heat set - by the first heater (3) and the heating device 1 (4).
The yarn is untwisted and then passes through the 20th wire (5) to the second heater (6) where it is heat treated to become a false twisted yarn (7). Heating device X! Although (4) is not particularly limited, it is preferable to use a bottle-type heating element in terms of promoting vapourization of the composite filament due to mechanical shock, and the first heater temperature is usually used at about 160 to 240°C. Ru.

The multifilament yarn obtained as described above is then 1! Perform weaving and make cloth. The texture of the fabric is not particularly limited, and it may be used in combination with other LRm, but in order to create a soft texture, the same type of yarn should be used so that the multifilament yarn is located on the surface layer of the fabric. Good to use for warp and front threads.

Next, the fabric is subjected to fibrillation treatment.

Fibrillation treatment can be performed by mechanically bending or impacting the joint surface of the composite filament to peel it off, chemically peeling it off, dissolving or decomposing the components, etc. In the present invention, in particular, A method of dissolving and removing the block polyether polyester component with an alkaline solvent is preferable, for example, 2 to 4% at 70 to 100°C.
When the composite filament is immersed in a caustic soda solution for about 20 minutes to reduce the weight by 20 to 25%, only the polyethylene terephthalate component of the composite filament is fibrillated and becomes a-distilled.

FIG. 8(a) is an electron microphotograph (8000 times) showing the cross-sectional shape of the composite filament treated with the alkaline solvent, and FIG. 8(b) shows the cross-sectional shape fibrillated by the same treatment. This is a microscopic photograph of the 1st child M.

(Function) In the method of the present invention, the composite filament yarn is subjected to false twisting, thereby causing distortion at the bonding surface and having a typical fibrillation ability. Facilitate processing.

(Example) Example 1 Polyethylene terephthalate having an intrinsic viscosity change (η) of 0.64 and a block polyether polyester obtained by copolymerizing polyethylene terephthalate component with 18 mol weight % of polyethylene glycol are shown in FIG. 1 (6). Thus, a composite fiber consisting of eight radial parts (block polyether polyester) and a complementary part (polyethylene terephthalate) joined together was melt-spun to obtain a multifilament yarn of 150 denier and 150 filaments. Such multifilament yarn has a strength of 4.04 g/d
.

It had physical properties of elongation of 29.2% and heat shrinkage of 18%.

Next, the same multifilament yarn was fed to the false twisting process shown in FIG. 2 at an overfeed rate of 2%.

Spindle rotation speed 25,700 Orpm, heater temperature 20
False twisting was performed at 0° C. and a false twist number of 2218 T/M.

The physical properties of the obtained processed yarn are strength: 8.6 g/d, elongation: 2
The %OR value was 26.6%, the heat shrinkage rate was 5.8%, and the torque was 201%.

After weaving an 8/8 twill fabric with a warp of 112 threads/inch and a weft of 77 threads/inch using a yarn obtained by twisting two such multifilament threads, the fabric was first woven in a 2% caustic soda solution at 98°C. The alkali test amount shown in the table was applied. Each fabric is then
After dyeing and drying at 120'0, heat set finishing was performed at 160°C to obtain a soft-touch fabric.

Table 1 When the surface of the fabric was touched, it felt extremely smooth.

(Effects of the Invention) As described above, the fabric obtained by the method of the present invention has an appropriate "firmness" and "body" consisting of a soft texture and bulkiness on the surface.
It has an unprecedented texture. Moreover,
The fibrillation treatment of composite fibers necessary to develop the texture can also be easily carried out according to the method of the present invention.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing a bonded state of composite filaments used in the present invention, and FIG. 2 is an explanatory view showing an example of the false twisting process of the present invention. Moreover, FIG. 8 is an rvl-ffi microscope photograph showing the shape of the composite filament yarn used in the present invention, and is a photograph of a vase showing the four tops of the fiber Q family. Figure 1 (A) (B) (C) (D) (
E) 2nd rlA

Claims (6)

[Claims] (1) Polyethylene terephthalate and block polyether polyester made by copolymerizing polyethylene terephthalate and polyethylene glycol are arranged in a cross section of a single filament along the longitudinal direction in a shape in which one component does not completely contain the other component. After false-twisting the composite filaments that are joined and have a polyethylene terephthalate fineness of 0.5 denier or less after splitting,
A method for producing a soft fabric, which comprises knitting and weaving a fabric using such multifilament yarn, and then fibrillating the composite filament yarn. (2) Block polyether polyester contains polyethylene terephthalate component and polyethylene glycol from 5 to 50%.
The method according to claim 1, wherein 50% by mole weight of the copolymer is copolymerized. (3) The method according to claim 1, wherein the composite filament has a cross-sectional shape in which two components are joined radially. (4) The method according to claim 1, wherein the fibrillation treatment is performed by dissolving treatment with an alkaline solvent. (5) The method according to claim 4, wherein the dissolution treatment is a 20 to 25% weight reduction process. (6) The method according to claim 1, wherein the heat treatment is performed by high-pressure dyeing at 110 to 140°C.