JPH0284590A - Production of fibrillated fibrous structure - Google Patents

Abstract

PURPOSE:To obtain the title soft structure by fibrillating a fibrous structure comprising wool and fibrillated conjugate filament made up of >=50vol.% of a polyamide component and the other fiber-forming polymer followed by dyeing at low temperatures. CONSTITUTION:(A) A fibrous structure comprising (1) wool and (2) fibrillation- type conjugate filament yarn >=1de in single fiber fineness after fibrillation, produced by e.g., radial melt conjugate spinning of >=50vol.% of a polyamide component (e.g., nylon 6) and the other fiber-forming polymer (e.g., polyethylene terephthalate) is immersed in an emulsion at <=70 deg.C containing e.g., benzyl alcohol followed by fibrillation of said filament yarn and then low-temperature dyeing of the fibrous structure at >=100 deg.C. The resultant fabric can uniformly be dyed, also having puffy softness.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for producing a fibrous structure using a superfibrillar composite m-fiber made of a large amount of polyamide component.

(Prior Art) Many attempts have been made to obtain an A-fiber structure with a suede-like appearance and a flexible texture using knitted or non-woven fabrics made of extremely fine single filaments (fibrils). .

One of the methods is to heat or chemically process knitted green fabrics or nonwoven fabrics obtained using fibrillated composite fibers to divide the composite fibers into their respective components (fibrillation) to create an indestructible structure. There is a way.

The fibrillated composite fibers are made by bonding multiple plates of high molecular weight polymers together, but generally polyamides and polyesters are bonded together, and the polyamide is swollen and contracted with a chemical to form fibrils. Benevolence is being practiced. For example, in Japanese Patent Publication No. 53-35635, a fibrillated composite fiber is used in which a boria component extending radially from the center and a wedge-shaped polyester component that complements this are joined, and the polyamide component is mixed with benzyl alcohol. It is disclosed that it causes contraction.

(Problem to be solved by the invention) However, the complex l! A-fibers have a large proportion of polyester components with poor dyeability, so it is difficult to dye them uniformly.Especially when mixed with composite fibers and wool, it is difficult to dye the polyester components using high temperature and high pressure dyeing methods. (Improving dyeing properties is a big problem.)

The present invention allows one point to be ff! I decide,
The purpose is to create rIj thin matte fibers that have sufficient dyeability even when natural protein fibers that do not undergo pH dyeing and fibrillated composite fibers are used in high-temperature, high-pressure dyeing. +3
The aim is to provide fiber structures.

(Means for Solving the Problems) The present invention is characterized in that a polyamide component of 50% (by volume) or more and another bag-forming polymer are joined, and the single fiber fineness after fibril is 1.0. By using a mixture of fibrillated condensed filament yarn with a denier or less and natural protein = fiber, +
This is a method for producing a fibril structure, which is characterized in that after forming a three-fiber structure, the composite filament is fibrillated at a temperature of 70° C. or lower, and then low-temperature dyeing is carried out at a temperature of 100° C. or lower.

In the fibrillated composite filament of the present invention, 50% (volume ratio) or more of a polyamide component and another component, preferably a high molecular weight polymer such as polyethylene terephthalate that has no affinity with polyamide, are bonded along the longitudinal direction of a single filament. The shape is preferably such that one component does not completely encompass the other component in the cross section of a single filament, and moreover, as shown in FIGS. It is preferable that the radial-shaped component part of the book and the polyamide component (2) that complements the radial part are bonded together. Furthermore, each ingredient is described below. ! If the fibrillation treatment does not result in a fineness of 1.0 denier or less, the soft texture that is the object of the present invention cannot be achieved. Examples of the polyamide used in the present invention include nylon 4
．． Nylon 6 nylon T, nylon 11. nylon 12
．． Nylon 66, nylon 6/10. Polymethaxylene adipamide, polyparaxylylene decanamide.

Pribiscyclohexylmethanedecanamide and copolyamides containing these as components include nylon 6,
Nylon 86 is preferred.

The natural protein fiber in the present invention is not particularly limited as long as it is a natural protein fiber such as wool or silk.

In the present invention, a fibrillated condensed filament yarn as described above and natural protein fiber are mixed to form a fiber structure.
Methods of mixing are not particularly limited, such as mixed knitting, mixed weaving, and various composite yarns such as mixed yarns, mixed twists, etc., but it is preferable to contain 50 weight or more of composite filament yarn. Further, the fiber structure referred to in the present invention is not particularly limited to woven fabrics, knitted fabrics, etc.

As the fibrillation treatment of the composite filament performed after forming the a-fiber structure, a method in which the polyamide component is caused to swell and contract using a chemical is preferable.

The method of dissolving and removing the non-polyamide component with an alkaline solution or the like is not preferred since the natural protein fibers may be damaged by the alkali. Such anti-fibrillation agents include benzyl alcohol and phenylethyl alcohol, and in particular, those prepared by adding a surfactant to these alcohols to form an emulsified dispersion aqueous solution are preferred because of their high fibrillating ability.

Such surfactants include nonionic surfactants, cationic surfactants, anionic surfactants, and amphoteric surfactants as long as they emulsify and disperse benzyl alcohol or phenylethyl alcohol so that the light transmittance is 50% or less. , or a mixture thereof.

The fibrillation treatment in the present invention may be performed by immersing the a-fiber structure in the emulsified aqueous solution, etc. It may be heated during the treatment, or it may be left immersed at room temperature, and the excess liquid may be squeezed out after immersion. A method of leaving it alone (batting method) may also be used. Generally, benzyl alcohol or haphenylethyl alcohol is used at a concentration of about L5 to 20%, but when the concentration is low (usually 5% or less), the method of soaking and heating is suitable, and when the concentration is 8% or more, the patting method is suitable. is suitable.

In the present invention, it is necessary to perform the fibrillation treatment at a temperature of 70° C. or lower. At temperatures above 70°C, the polyamide component shrinks too much, resulting in a hard texture, making it impossible to obtain a fibrous structure with a soft texture and elegant luster, which is the object of the present invention.

After fibrillating the composite fibers, both the composite fibers and the natural protein fibers are low-temperature dyed at a temperature of 100° C. or lower. For this reason, it is preferable to use dyes that can be dyed at room temperature and under normal pressure, such as acid dyes and alloy dyes.

(Example) Example 1 Eight radial-shaped nylon 66 extending from the center and complementary polyethylene terephthalate (hereinafter abbreviated as PET) were melt-bonded and spun at a ratio of 3:1 (volume ratio). A fibrillated composite filament (Fig. 5) with a single filament fineness of 0.2 denier after fibrillation (Fig. 5) is used as a weft.
A plain woven fabric was woven using high-count wool for the warp. The plain woven fabric was mixed with 25% benzyl alcohol and 2.0% emulsifier. After soaking in s% normal temperature emulsion solution and squeezing it out to a liquid retention rate of 100%, it was left to stand at room temperature for 10 minutes, and then heated to 60℃ for 10 minutes.
! Wash for 1 hour, dry, then dye for 90 minutes using acid dye.
Staining was performed at °C. When the obtained fabric was examined, it was found to be very soft and plump, with a silk-like texture, water pressure resistance of 270 mm, and suitable as a material for outer clothing.

Example 2 The plain woven fabric of IJ'J Example 1 was immersed in an emulsion solution containing T% β-phenylethyl alcohol and 2% emulsifier, then washed with hot water at 60°C, dried, and dyed with a υ dye at 90°C. Ta.

The obtained woven fabric had a soft and fluffy texture, and had a water pressure resistance of 260 mm, making it useful as a material for outer clothing.

Example 3 The fibrillated composite filament of Example 1 was used as a weft,
A plain woven fabric was woven using 120 count silk as the warp, and treated in the same manner as in Example 1.

The resulting fabric had a soft and plump texture.

Comparative Example 1 A plain woven fabric was woven using a fibrillated composite filament (Fig. 5) obtained by melt-spinning 6B nylon and PET at a ratio of 1:3 (volume ratio) as the weft and 48 count wool as the warp. , and treated in the same manner as in Example 1. The texture of the obtained fabric was soft and fluffy, but P
Because the ET component did not dye the fabric, it became a chambray-like fabric.

Comparative Example 2 A plain woven fabric was woven using 48-count wool for the warp and non-split type 66 nylon for the weft, and dyed at 90° C. using an acid dye. The obtained fabric could be dyed under normal pressure, but the texture was a little stiff and a soft and fluffy fabric could not be obtained.

Comparative Example 3 A fibrillated composite filament (Fig. 3) prepared by melt-spinning 48-count wool for the warp and 6B nylon and alkali-soluble PET for the weft at a ratio of 5:1 (volume ratio) was used to make a flat filament. Weaved textiles.

The obtained gray fabric was dissolved in an aqueous solution containing 2% by weight of caustic soda.
The polyester part was dissolved by processing at 00°C for 60 minutes, but
The wool has also dissolved. Table 1 shows the evaluation of the woven and knitted fabrics obtained in each example.

(Effects of the invention) As described above, the fibrillated fiber structure according to the present invention has
It has a soft texture and an elegant luster, and is useful when exposed as a material for outer clothing, and the present invention allows such a material to be easily produced industrially.

In addition, since it uses a material with a polyamide component ratio of 60% or more, it can be dyed under normal pressure, and can be dyed with natural proteins such as wool and silk. It is also possible to mix it with fibers.

[Brief explanation of drawings]

1 to 5 are schematic diagrams showing cross sections of fibrillated composite filaments suitable for use in the present invention. (I3)...Polyamide component applicant Keibo Co., Ltd. 3,711. of

Claims (1)

[Claims] (1) A fibrillated composite filament yarn in which 50% (volume ratio) or more of a polyamide component and another fiber-forming polymer are bonded, and the single filament fineness after fibrillation is 1.0 denier or less. , a method for producing a fibrillar fiber structure, characterized in that after forming a fiber structure by mixing with natural protein fiber, the composite filament is fibrillated at a temperature of 70°C or lower, and then low-temperature dyeing is carried out at a temperature of 100°C or lower. .