JPH0364515A - Polyvinyl chloride-based fiber and its production - Google Patents

Abstract

PURPOSE:To obtain the subject fiber having hot adhesiveness and excellent adhesiveness even to phenolic resin material by preparing a spinning solution with dissolving a specific PVC-based copolymer in organic solvent and fiberizing with dry or wet spinning at a specific spinning draft. CONSTITUTION:A PVC-based copolymer composed of 60-95wt.% vinyl chloride, 2-39.9wt.% vinyl acetate and 0.1-10wt.% vinyl derivative having hydroxyl group at a part of main chain or side chain is dissolved in an organic solvent to obtain a spinning solution having 15-50wt.% concentration and fiberized by dry or wet spinning at 0.5-8.0 spinning draft to afford the objective fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a polyvinyl chloride fiber having thermal adhesive properties and a method for producing the same.

(Conventional technology) Phenomena is used for various molded products, laminated products, inorganic/organic material binding materials, etc. in fields that require electrical insulation, mechanical strength, heat resistance, moisture resistance, and water resistance. −μ resin material is
At present, there is a tendency for only the functional aspects to be prioritized, and the design quality is lacking.

On the other hand, a terpolymer of vinyl chloride, vinyl acetate, and a vinyl derivative having a hydroxyl group in a part of the main chain and/or side chain is used as a solution, emulsion, or powder adhesive for phenolic resin materials. ing.

(Problems to be Solved by the Invention) As a means of improving the texture of phenolic resin materials, it is possible to obtain a product with a high-class feel and excellent design by combining non-woven fabrics to give a fabric-like appearance. I can do it.

On the other hand, in recent years, the cost of nonwoven fabrics has become lower due to advances in manufacturing technology, and the use of a mixture of thermoadhesive fibers such as polyethylene, polypropylene, polyester μ, and nylon, which are suitable for thermal bonding purposes, and the fibers that form the main body of nonwoven fabrics. Various types of nonwoven fabrics have also been developed. By mixing fibers with different thermal bonding properties in this way, there is an advantage that the fiber remains in a fabric-like state even after thermal bonding, compared to the case where only heat bondable fibers are used. In addition, by adjusting the composition ratio, structure, etc. of the nonwoven fabric, it becomes easier to control the physical properties such as strength required of the nonwoven fabric itself, and textures such as appearance and texture can be varied by embossing etc. It is possible to obtain products with high added value.

However, conventionally known heat-adhesive fibers such as polyethylene, polypropylene, and polyester-μ have self-adhesive properties but do not have the ability to adhere to phenol-μ resin materials. It is necessary to use an adhesive or to newly mix heat-adhesive fibers with an adhesive function, which poses problems in terms of processability and consistency. Therefore, in order to improve the texture of products, it has been desired to develop a new thermoadhesive fiber capable of adhering to pheno-p resin materials.

The present invention uses copolymers of vinyl chloride, vinyl acetate, and vinyl derivatives having hydroxyl V/L/groups in part of the main chain and/or side chain, which have been known as solution emulsion or powder adhesives. It is made into fibers and used to make non-woven fabrics, and in addition to adhesion to pheno-μ resin materials,
It also provides adhesive properties to μm flying materials using vinyl chloride resin materials, which have been rapidly growing in recent years, to building materials such as wall covering materials and flooring materials, as well as automobile interior materials, allowing for a wider range of adhesive applications. In addition, the present invention provides a fiber that can improve its design and a method for producing the same.

Furthermore, by using a nonwoven fabric, the cost during adhesive processing can be reduced, and the nonwoven fabric provides a fiber that is easy to handle and has excellent processability.

(Means for solving the problem) The present invention includes vinyl chloride/I/60-95 double fluorescence, vinyl acetate/
I/2-399 polyvinyl chloride fiber having double fluorescence and hydroxyl groups in part of the main chain and/or side chain 0.1 to 10%, and the copolymer dissolved in an organic solvent to obtain a concentration of A method for producing polyvinyl chloride fibers, which is characterized in that it is made into fibers by dry or wet spinning at a spinning draft of 05 to 8.0 using a fluorescent spinning liquid having a weight ratio of 15 to 50.

The present invention will be explained in more detail below.

The present invention is a fiber made of a copolymer mainly composed of vinyl chloride, vinyl chloride IV 60-95 double fluorescence, vinyl acetate 2
A fiber is formed from a polyvinyl chloride copolymer composed of ~399 weight light and a vinyl derivative having hydroxyl groups in the main chain and/or part of the side chain. When the amount of vinyl acetate in the copolymer is less than 2%, plasticity, solubility in solvents,
Insufficient thermal adhesion properties may occur, and if the weight ratio is 39.9, the basic toughness of the fiber and the softening temperature will be significantly lowered. Furthermore, vinyl derivatives having hydroxyl groups in part of the main chain and/or side chain that are copolymerized with vinyl acetate are F! The insulation properties, mechanical strength,
An effective ingredient for improving and improving the adhesion of phenolic resin materials used in various molded products and laminated products used in fields that require heat resistance, moisture resistance, and water resistance, as well as inorganic and organic material binders. For example, vinyl alcohol, 2-hydroxypropyl acrylate, etc. are used. Naturally, when the amount of the vinyl derivative is less than 0.1 weight light, the effect of improving adhesion is small, but when it exceeds 10 weight light, a more significant improvement effect is not observed.

The fibers of the present invention include vinyl chloride, vinyl acetate and the main chain and/or
Alternatively, a polyvinyl chloride copolymer composed of a vinyl derivative having a hydroxyl group in a part of the side chain can be used as a main raw material to form fibers by a dry or wet spinning method.

Organic solvents such as ketones, esters, and chlorinated hydrocarbons can be used as the solvent for the spinning stock solution, such as ethyl acetate, butyl acetate, acetone, methyμ ethylketone, methiμ isobutyμ ketone, and diisobutyl ketone. , ethylene dicrophyte, propylene oxide, dioxane, isophorone, dibutymu phosphite, etc. Furthermore, it is also possible to use a mixed solvent in which a poor solvent is added in addition to these.

A spinning dope is prepared by adding an organic solvent to a polyvinyl chloride copolymer.

The concentration of the polyvinyl chloride copolymer in the spinning dope is preferably 15 to 50% by weight, preferably 23 to 47% by weight, depending on its viscosity. If the concentration exceeds 50%, the viscosity increases, making it difficult to maintain the uniform quality of the spinning dope, and the ejection properties from the spinneret deteriorates, which is not preferable. On the other hand, 15
If it is less than the weight, the spinnability will be low and the spinning stability will be reduced.

When forming fibers by dry spinning, the spinning dope is discharged from a spinneret into a heated atmosphere at 25 to 140°C, and the solvent is evaporated and evaporated to form fibers.

In the case of wet spinning, the material is discharged into a poor solvent or a coagulating solution consisting of a poor solvent and the above-mentioned solvent to remove the solvent and form fibers. The spinning draft during this spinning, that is, the ratio of the discharge speed of the spinning dope to the take-up speed (take-up speed/discharge speed) is 0.5.
-8.0, but a low draft of less than 0.5 is undesirable because it invites wobbling of the yarn in the drying atmosphere at step 1 taken up by the feed roller and reduces spinning stability. In the present invention, 0.
Desirable yarn physical properties and spinning stability can be sufficiently ensured within the range of spinning draft of 5 to 8.0.

The polyvinyl chloride fiber of the present invention can be obtained in the manner described above.

(Example) Hereinafter, the present invention will be specifically explained with reference to Examples.

Example: A terpolymer with a degree of polymerization of 430 consisting of vinyl chloride (92 parts by weight), vinyl acetate (3 parts by weight), and vinyl alcohol/115 parts by weight (light parts) was mixed with methylene chloride (91 parts by weight) and methanol (91 parts by weight).
It was dissolved in a mixed solvent consisting of heavy light, and the concentration was adjusted to 30% light to obtain a spinning stock solution. This spinning stock solution was heated to 60° C., and dry spinning was performed under the conditions shown in Table 1 through a spinneret with a hole diameter of 49 μm. The results are shown in FIG.

The fibers thus obtained were made into nonwoven fabrics and tested for adhesion to various materials. The results are shown in Table 2. The ○ mark indicates good adhesion, and the x mark indicates poor adhesion.

Table 1 (Effects of the Invention) The polyvinyl chloride fiber of the present invention can be used alone or with acrylic μ
It can be made into a nonwoven fabric by mixing with fibers or other fibers, and it has excellent adhesion to pheno-μ resin materials as well as basic adhesion to polyvinyl chloride resin materials. , its applications in the field of adhesives have expanded, and it is of great practical use and significance.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the relationship between stretching ratio and dry strength/dry elongation.

Claims (2)

[Claims] (1) Vinyl chloride 60-95% by weight, vinyl acetate 2-3
A polyvinyl chloride fiber made of a polyvinyl chloride copolymer composed of 9.9% by weight and 0.1 to 10% by weight of a vinyl derivative having a hydroxyl group in a part of the main chain and/or side chain. (2) Vinyl chloride 60-95% by weight, vinyl acetate 2-3
A polyvinyl chloride copolymer composed of 9.9% by weight and 0.1 to 10% by weight of a vinyl derivative having a hydroxyl group in a part of the main chain and/or side chain is dissolved in an organic solvent to a concentration of 15%. A method for producing polyvinyl chloride fibers, which comprises using a spinning dope of ~50% by weight and forming fibers by dry or wet spinning at a spinning draft of 0.5 to 8.0.