JPS60224874A - Anti-staining synthetic fiber - 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 stain-resistant synthetic fiber with excellent durability.

(Prior art) As a method of imparting antifouling properties such as water repellency, oil repellency, liquid stain resistance, and dry stain resistance to textile products, especially sportswear, raincoats, carpets, etc., the surface of the textile products is coated with fluorine-containing compounds. The method of processing is generally adopted. Traditionally, the main treatment method has been post-processing the product, which has performance problems such as lack of durability of the antifouling effect, as well as the disadvantages of complicating the process, reducing operability and increasing costs. There is. For this reason, in recent years, methods have been proposed in which fluorine compounds are introduced in the form of blends or copolymerization before fiber formation, or methods are fixed to fiber threads immediately after fiber formation, some of which are already in practical use. It has reached the stage of transformation. However, even these methods have problems. In other words, in the former case, the fluorine compound is dispersed in the polymer that forms the fiber, so the concentration of the fluorine compound on the fiber surface tends to be insufficient, making it difficult to develop a sufficient antifouling effect. It has been pointed out that although the adhesion between the fiber-forming polymer and the fluorine compound is considerably improved over the above-mentioned post-processing method, it is not sufficient to withstand repeated cleanings and 7 rods.

In view of this situation, the inventors of the present invention sought to provide fibers with good antifouling effects and durability (as a result of various studies, it was found that it was possible to apply a film of a fluorine-containing compound to the surface of a synthetic fiber containing a fluorine compound). We discovered that it is effective and would like to propose it first (Japanese Patent Application No. 58-228924).

(Objective of the Invention) The object of the present invention is to provide a synthetic fiber having an antifouling effect and durability as good as those proposed previously.

(Structure of the Invention) As a result of further research on the previously proposed product, the present inventors found that good effects can be obtained even if an organic polysiloxane is introduced into the fiber instead of the pentafluorine compound1. We have arrived at the present invention.

That is, the gist of the present invention is a stain-resistant synthetic fiber characterized in that the surface of the synthetic fiber containing organic polysiloxane is coated with a fluorine-containing compound.

In the present invention, organic polysiloxanes having the following structural units are preferably used.

1 1←5i-0-+- 2 (R', R'' is an alkyl group having 15 or less carbon atoms.

Indicates a cycloalkyl group, aryl group or aralkyl group. ) Preferred specific examples of organic polysiloxanes include polydimethylsiloxane, polydiphenylsiloxane, and polymethyl phenylsiloxane.

The organic polysiloxane preferably has a low branched structure and has a molecular weight that does not volatilize during introduction into the fiber-forming polymer or use of the fiber. Also,
The organopolysiloxane may be copolymerized into the fiber-forming polymer.

In addition, in the present invention, the polymers forming the fibers include polyethylene terephthalate, polybutylene terephcrate, etc., polyesters containing these as main components, nylon 6, nylon 66, etc., and polyamides containing these as main components.
In addition to melt-spun polymers such as polyethylene, polypropylene, etc. and polyolefins containing these as main components, fiber-forming polymers that can be wet-spun, dry-spun, or emulsion-spun are included.

Second, in the present invention, the fluorine-containing compound that coats the fiber surface means a compound that is usually used as an antifouling agent.
Typical examples include the following.

A polymer obtained by homopolymerizing or copolymerizing a fluorine-containing monomer represented by the following general formula (3), or a polymer obtained by copolymerizing these monomers with another fluorine-free monomer.

Ro small number CHz = CC00Rf (11 R,R.

CHI = CC00Rz NOx SRf [21R
+ Rs CHz = CCOOR1N0CRf (31 (Here, R1 is a hydrogen atom or a methyl group, Rz is a carbon atom tj!l
I-10 alkylene group, cycloalkylene group, arylene group, or aralkylene group 2R1 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group, an aryl group, or an aralkyl group, Rf is a hydrogen atom on the carbon atom represents a fluoroalkyl group having 7 to 30 carbon atoms in which part or all of is substituted with a fluorine atom. Also.

A part or all of the hydrogen atoms on the carbon atoms of Rz and Rs may be substituted with fluorine or chlorine atoms.) (bl) A fluorine-containing urethane compound represented by the following general formula (4).

Rf 0CON+(-R4-NI(COORf f41
(R1 is a divalent organic group having 2 to 20 carbon atoms.

R, and Rf, which may contain bonds such as -O-, -SO□-, COO-, N (R3)-, represent the groups described above. ) [C1 A fluorine-containing polyester having a repeating unit represented by the following general formula (5).

Rf 00CRa COORs (51 (R5 is a trivalent hydrocarbon group having 2 to 10 carbon atoms.

In the present invention, the amount of organic polysiloxane contained in the fiber is 0.05 to 5% by weight, preferably 0.1 to 3% by weight, and the amount of organic polysiloxane contained in the fiber is 0.05 to 5% by weight, preferably 0.1 to 3% by weight. The amount of the fluorine compound is preferably 0.05 to 2% by weight or 0.1 to 1.5% by weight based on the fiber from the viewpoint of good antifouling performance. In particular, the content of organic polysiloxane in the fiber should be determined in consideration of spinnability and yarn properties.

The fiber of the present invention can be manufactured by applying a known method. That is, this is a method in which an organic polysiloxane is blended into a fiber-forming polymer in an arbitrary step before spinning, and a film of a fluorine-containing compound is formed in an arbitrary step after being discharged from a spinning hole. Particularly preferred is a method in which an appropriate amount of a liquid containing a fluorine-containing compound is applied to an undrawn fiber yarn, and then the stretching of the yarn and the heat fixation treatment of the fluorine-containing compound are carried out simultaneously or separately. The fixing treatment may be carried out after knitting and weaving.) In addition to the effect that antifouling fibers can be obtained directly in the fiber forming process, there is also the advantage that the adhesion between the film of the 5-fluorine-containing compound and the fibers is excellent.

In addition, it is also possible to use a lubricant (preferably a fluorine-containing lubricant) in order to improve the dyeability of the fibers, and in particular, the fibers of the present invention may be further coated with a fluorine-containing lubricant. This is excellent in that it can improve dyeability without impeding antifouling performance.

The fibers of the present invention can be used not only for antifouling purposes, but also for so-called breathable and moisture-permeable waterproof fabrics. (In this case, it is preferable to use yarn with a small single filament fineness.) It goes without saying that flame retardants, antistatic agents, softeners, etc. may be introduced into the interior or surface of the fibers.

(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples. Water repellency and oil repellency were evaluated by the following method.

u) tG aqueous: Gently place one drop (approximately 0.3 ml) of the isopropyl alcohol/water mixture having the composition shown in Table 1 on the test cloth, and find the highest water repellency of the mixture composition that does not soak in after 5 minutes. I was impressed.

Table 1 +21 ta Oiliness: Based on ATCC-TM118 method.

Examples and Comparative Examples Polydimethylsiloxane (AI) or polydiphenylsiloxane [Ai and 9
A mixture with nylon 6 having an intrinsic viscosity of 1.1 measured at 25° C. in 6% sulfuric acid was fed to an extruder type melt spinning machine and mixed and spun. that time.

70% by weight of 2-perfluorooctylethyl acrylate, 25% by weight of vinyl chloride, 3% by weight of 2-chloroethyl vinyl ether, and 2% by weight of 2-hydroquinoethyl acrylate for the 24-filament yarn running down from the spinneret. A solution prepared by dispersing 5 parts by weight of a copolymer [B,] in 95 parts by weight of a mineral oil solution or
2-perfluorooctylethoxycarbonylamino)
1,200 m by attaching a solution in which 5 parts by weight of diphenylmethane (BZ) was dispersed in 95 parts by weight of a mineral oil-based oil solution.
/lll1n.

Next, these undrawn yarns were drawn at a temperature of 100°C.

It was drawn at a drawing ratio of 2.8 times and a drawing speed of 1,000 m/sin to obtain a drawn yarn of 70 d/24 f.

The drawn yarn is warp 110/2.54cm, weft 100/2.
It was woven into taffeta with a density of 54 cm, heat treated at 150° C. for 1 minute, and washed with hot water to remove the oil agent. After drying the obtained cloth at 105°C for 1 hour, 18 water and FA oil performance (initial performance) were measured. Next, this cloth was subjected to home laundry 50 times at 40° C. for 10 minutes in a bath containing a weakly alkaline synthetic detergent.

After air drying, hot air drying was performed at 150°C for 2 minutes.

Water repellency and oil repellency (durability) were measured.

The results are shown in Table 2. Note that Comparative Examples 1 and 2 are cases where no organic polysiloxane was blended.

Table 2 (Effects of the Invention) As described above, according to the present invention, the antifouling synthetic material has good antifouling effect (1B water, ?8 oil) and durability, and can be manufactured in a simple process. Fiber is provided.

Patent applicant: Unitika Co., Ltd.

Claims (1)

[Claims] +11 An antifouling synthetic fiber comprising a synthetic fiber containing an organic polysiloxane, the surface of which is coated with a fluorine-containing compound.