WO2005111283A1

WO2005111283A1 - Polyvinyl chloride fiber, process for producing the same, and artificial hair

Info

Publication number: WO2005111283A1
Application number: PCT/JP2004/006627
Authority: WO
Inventors: Masamichi Kanaoka; Akira Sakurai; Atsushi Horihata
Original assignee: Denki Kagaku Kogyo Kabushiki Kaisha
Priority date: 2004-05-17
Filing date: 2004-05-17
Publication date: 2005-11-24
Also published as: JP4496214B2; JPWO2005111283A1

Abstract

A polyvinyl chloride fiber made of a resin composition comprising 100 parts by mass of a polyvinyl chloride resin and 1 to 20 parts by mass of a maleimide copolymer. The maleimide copolymer preferably is one obtained by copolymerizing 15 to 70 parts by mass of an aromatic vinyl monomer with 30 to 85 parts by mass of an unsaturated dicarboximide derivative, wherein the aromatic vinyl monomer preferably is styrene and the unsaturated dicarboximide derivative preferably is N-phenylmaleimide. The unsaturated dicarboxylic anhydride preferably is maleic anhydride. This polyvinyl chloride fiber is preferably used as an artificial hair.

Description

Specification

Polychlorinated bullet fiber, method for producing the same, and artificial hair

Technical field

TECHNICAL FIELD [0001] The present invention relates to polychlorinated vinyl fibers used in artificial hair for hair decoration such as wigs, hairpieces, blades, and extension hair, insect nets, and brushes, and a method for producing the same.

Background art

[0002] The present inventors have prepared a polychlorinated vinyl chloride resin having 100 parts by mass, a chlorine content of 57.0 to 62.0% and an average degree of polymerization of 550 to 750, and a chlorinated polychlorinated vinyl resin having 5 to 20 weight parts Parts and a resin composition having 5 to 30 parts by weight of a chlorinated polychlorinated vinyl resin having a chlorine content of 65.0 to 67.0% and an average degree of polymerization of 550 to 750 (see Patent Document 1). See).

Patent Document 1: JP 2003-193329 A

Disclosure of the invention

Problems to be solved by the invention

[0003] However, in the production of the polyvinyl chloride fiber, when the amount of the two types of chlorinated polyvinyl chloride added to develop heat resistance increases, the resin composition becomes There is a problem that the spinnability decreases when the melt viscosity increases.

[0004] An object of the present invention is to solve a powerful problem.

[0005] That is, the present invention provides a polychlorinated vinyl fiber having a small heat shrinkage even when a secondary kamen treatment is performed by applying heat of 100 ° C or more while maintaining good spinnability during melt spinning. And a method for producing the same.

Means for solving the problem

[0006] The invention described in claim 1 is characterized by comprising a resin composition having 100 parts by mass of a polyvinyl chloride resin and 120 parts by mass of a maleimide copolymer. It is.

[0007] The invention described in claim 2 is the invention according to claim 1, wherein the male The copolymer is a maleimide copolymer obtained by copolymerizing 15 to 70 parts by mass of an aromatic butyl monomer and 30 to 85 parts by mass of an unsaturated dicarboxylic acid imide derivative. It is.

[0008] The invention described in claim 3 is the invention according to claim 1, wherein the maleimide copolymer is composed of 15 to 70 parts by mass of an aromatic vinyl monomer and unsaturated dicarboxylic acid imide. 30 to 85 parts by mass of conductor, 0.1 to 25 parts by mass of unsaturated dicarboxylic anhydride, and 0.140 parts by mass of vinyl monomers other than these monomers copolymerizable with these monomers And a maleimide copolymer obtained by copolymerizing the above.

[0009] The invention described in claim 4 is the invention described in claim 2 or 3, wherein the aromatic butyl monomer is styrene.

[0010] The invention described in claim 5 is characterized in that, in the invention described in claim 24, the unsaturated dicarboxylic acid imide derivative is N-phenylmaleimide. It is a sign.

[0011] The invention described in claim 6 is characterized in that, in the invention described in any one of claims 3 to 5, the unsaturated dicarboxylic anhydride is maleic anhydride. It does.

[0012] The invention according to claim 7 is the invention according to claim 16, wherein the maleimide copolymer has a mass average molecular weight of 60,000 to 140,000. It is a feature.

[0013] The invention described in claim 8 comprises a resin composition having 100 parts by mass of a polychlorinated vinyl resin, 120 parts by mass of a maleimide copolymer, and 130 parts by mass of a vinyl copolymer. In the polychlorinated vinyl fiber, the vinyl copolymer is obtained by copolymerizing 40 to 90 parts by mass of an aromatic vinyl monomer and 10 to 60 parts by mass of a cyanogenated vinyl monomer. It is a polychlorinated bull fiber characterized by being a polymer.

[0014] The invention according to claim 9 is the invention according to claim 8, wherein the vinyl copolymer comprises 40 90 parts by mass of an aromatic vinyl monomer and 10-vinyl vinyl cyanide monomer. It is a bullet copolymer obtained by copolymerizing 60 parts by mass and 0.1 to 40 parts by mass of a vinyl monomer other than these monomers copolymerizable with these monomers. Is to be [0015] The invention described in claim 10 is the invention described in claim 8 or 9, characterized in that the aromatic vinyl monomer is S and styrene.

[0016] The invention described in claim 11 is the invention described in any one of claims 810, characterized in that the monomer is acrylonitrile.

[0017] The invention according to claim 12 is the invention according to any one of claims 811, wherein the butyl copolymer is composed of 7590 parts by mass of styrene and 1025 mass of atarilonitrinole. Is a bullet copolymer obtained by copolymerizing a part with a copolymer.

[0018] The invention according to claim 13 is characterized in that, in the invention according to any one of claims 812, the mass average molecular weight of the bullet copolymer is 50,000 to 110,000. Is what you do.

[0019] The invention described in claim 14 is characterized in that a resin composition having 100 parts by mass of a polychlorinated vinyl resin and 120 parts by mass of a maleimide copolymer is melt-spun. is there.

[0020] The invention described in claim 15 is an artificial hair characterized by being constituted by the polychlorinated biel fiber according to any one of claims 11 to 13.

The invention's effect

[0021] According to the invention described in Claims 11 and 14, the polychlorinated vinyl fiber has 100 parts by mass of the polychlorinated vinyl resin and 1120 parts by mass of the maleimide copolymer. Since it is composed of a resin composition, it maintains good spinnability during melt spinning, and has low thermal shrinkage even when subjected to secondary processing by heating at 100 ° C or higher. It can be used as a dagger bull fiber.

[0022] According to the invention described in claims 8 to 13, 100 parts by mass of the polychlorinated butyl resin, 120 parts by mass of the maleimide copolymer, and 130 parts by mass of the butyl copolymer In a polychlorinated vinyl fiber composed of a resin composition having the formula, the vinyl copolymer is obtained by copolymerizing 40 to 90 parts by mass of an aromatic vinyl monomer and 10 to 60 parts by mass of a cyanogenated vinyl monomer. Since it is a vinyl copolymer obtained by the above method, the polyvinyl chloride resin and the maleimide copolymer are used. The glass transition temperature is lowered by further improving the compatibility between the polymer and the Biel copolymer, and therefore, the flowability is improved, and therefore, the extrusion stability, that is, the spinnability is improved, and the spinning during melt spinning is performed. Even if the secondary processing is performed by applying heat of 100 ° C. or more while maintaining the properties, it is possible to obtain a polychlorinated bull fiber having a small heat shrinkage.

[0023] According to the invention described in claims 8 to 13, since it is constituted by the polychlorinated bull fiber according to any one of claims 11 to 13, the heat of 100 ° C or more can be obtained by heating. Even after the subsequent processing, artificial hair can be obtained with less heat shrinkage.

BEST MODE FOR CARRYING OUT THE INVENTION

The polychlorinated vinyl fiber of the present invention is composed of a resin composition having 100 parts by mass of a polychlorinated vinyl resin and 120 parts by mass of a maleimide copolymer. As described above, when the polychlorinated vinyl fiber is composed of the resin composition having 100 parts by mass of the polychlorinated vinyl resin and 120 parts by mass of the maleimide copolymer, the spinnability during melt spinning is improved. While maintaining the temperature, it is possible to obtain a polychlorinated biel fiber with less heat shrinkage even if heat is applied at 100 ° C or more and subjected to a second heat treatment.

[0025] The poly (vinyl chloride) resin in the present invention may be a vinyl chloride homopolymer, a chlorinated vinyl chloride polymer, a copolymer of vinyl chloride and another monomer other than the vinyl chloride, or a mixture of two or more of these. It was done. The "other monomer other than vinyl chloride" includes, for example, ethylene, propylene, alkyl vinyl ether, vinylidene chloride, vinyl acetate, acrylic acid ester, and maleic acid ester. As long as it is a monomer other than these, it does not matter. The average degree of polymerization of the polychlorinated vinyl resin in the present invention is preferably from 600 to 1300. If the average degree of polymerization is less than 600, the melt viscosity decreases and spinnability deteriorates.If the average degree of polymerization exceeds 1300, the melt viscosity increases. Therefore, coloring occurs in the salted fiber.

[0026] The maleimide copolymer in the present invention is a polyvinyl chloride fiber that has low heat shrinkage even when subjected to secondary processing by applying heat of 100 ° C or more while maintaining spinnability during melt spinning. In order to achieve this, the amount of the maleimide copolymer to be added to the polychlorinated vinyl resin is preferably 120 parts by mass with respect to 100 parts by mass of the polyvinyl chloride resin. More preferably, it is 3 to 15 parts by mass. If the blending amount of the maleimide copolymer is less than 1 part by mass, the heat shrinkage of the poly (vinyl chloride) fiber cannot be reduced, and if the blending amount exceeds 20 parts by mass, the spinnability becomes poor. It will be worse.

[0027] The maleimide copolymer is preferably a maleimide copolymer obtained by copolymerizing 1 70 parts by mass of an aromatic vinyl monomer and 30 to 85 parts by mass of an unsaturated dicarboxylic acid imide derivative. . When the unsaturated dicarboxylic acid imide derivative is less than 30 parts by mass, the maleimide copolymer has poor extrusion compatibility because of poor compatibility when melt-mixed with a vinyl chloride resin, resulting in poor extrusion stability. If the amount of the unsaturated dicarboxylic acid imide derivative exceeds 85 parts by mass, the heat shrinkage of the polychlorinated vinyl fiber cannot be reduced. Therefore, as in the present invention, the maleimide copolymer is a maleimide copolymer obtained by copolymerizing 1570 parts by mass of an aromatic butyl monomer and 30 to 85 parts by mass of an unsaturated dicarboxyimide derivative. If so, the compatibility between the polychlorinated butyl resin and the maleimide copolymer is further improved, and the heat resistance effect is further improved. Therefore, while maintaining the spinnability during melt spinning, 100% Even if the secondary processing is performed by applying heat of not less than ° C, it is possible to obtain a polyvinyl chloride fiber with little heat shrinkage.

[0028] The maleimide copolymer in the present invention is more preferably 15-70 parts by mass of an aromatic vinyl monomer, 30-85 parts by mass of an unsaturated dicarboxylic imide derivative, and unsaturated dicarboxylic anhydride. A maleimide copolymer obtained by copolymerizing 0.1 to 25 parts by mass and 0.1 to 40 parts by mass of a vinyl monomer other than these monomers copolymerizable with these monomers. is there. If the amount of the unsaturated dicarboxylic anhydride is less than 0.1 part by mass, the compatibility between the polychlorinated vinyl resin and the maleimide copolymer is reduced, so that the extrusion stability is maintained. When the amount exceeds 25 parts by mass, the effect of imparting heat resistance cannot be further improved. Therefore, as in the present invention, when the vinyl copolymer is polymerized with the above-mentioned “vinyl monomer other than these monomers that can be copolymerized with these monomers 0.1 to 40 parts by mass”, Since the compatibility between the polyvinyl chloride resin and the maleimide copolymer can be further improved while maintaining the heat resistance imparting effect, the heat of 100 ° C or more can be maintained while maintaining the spinnability during melt spinning. In addition, a polyvinyl chloride fiber with little heat shrinkage even after secondary processing can be obtained. [0029] The aromatic biel monomer in the present invention is an aromatic vinyl monomer selected from styrene, α-methylstyrene, biel toluene, ethynolestyrene, t-butynolestyrene, chlorostyrene, dichlorostyrene, and a substituted product thereof. It is a monomer that is a monomer, preferably styrene, which makes it easy to numerically control the molecular weight that increases by the reaction. Further, the aromatic vinyl monomer in the present invention may be an aromatic vinyl monomer other than the above-mentioned aromatic vinyl monomers, as long as the object of the present invention is not contravened.

[0030] The unsaturated dicarboxylic imide derivative in the present invention is an aromatic vinyl monomer selected from maleimide, N-methylmaleimide, N-ethylmaleimide, and N-cyclohexylmaleimide N-phenylmaleimide And preferably N-phenylmaleimide having high heat resistance. Further, the unsaturated dicarboxylic imide derivative in the present invention may be an unsaturated dicarboxylic imide derivative other than the unsaturated dicarboxylic imide derivatives mentioned above, as long as the object of the present invention is not contradicted.

[0031] The unsaturated dicarboxylic anhydride in the present invention is an unsaturated dicarboxylic anhydride selected from maleic acid, icotanic acid, citraconic acid, and aconitic acid. Preferably, numerical control of the molecular weight increased by the reaction is performed. Maleic anhydride that facilitates. Further, the unsaturated dicarboxylic anhydride in the present invention may be an unsaturated dicarboxylic anhydride other than the above-mentioned unsaturated dicarboxylic anhydride, as long as the object of the present invention is not contradicted.

[0032] The biel monomer in the present invention includes, for example, biyl cyanide such as acrylonitrile, metathallonitrile, and crotal attarylonitonyl; acrylic acid esters such as methyl acrylate, ethyl acrylate, and butyl acrylate; Methacrylic acid esters such as tallylate and ethyl methacrylate; and butyl carboxylic acids such as acrylic acid and methacrylic acid.

[0033] The maleimide copolymer in the present invention preferably has a weight average molecular weight of 6000 to 140,000, and more preferably 80,000 to 120,000. When the weight-average molecular weight of the maleimide copolymer is less than 60,000 or more than 140,000, the compatibility with polychlorinated butyl decreases, and the spinnability deteriorates.

[0034] The polychlorinated butyl fiber of the present invention is a resin having 100 parts by mass of a polychlorinated butyl resin, 120 parts by mass of a maleimide copolymer, and 130 parts by mass of a vinyl copolymer. Composition And a vinyl copolymer obtained by copolymerizing 40 to 90 parts by mass of an aromatic vinyl monomer and 10 to 60 parts by mass of a cyanide butyl monomer. Combined power. As described above, the resin composition having 100 parts by mass of the polyvinyl chloride resin, 120 parts by mass of the maleimide copolymer, and 110 parts by mass of the vinyl copolymer is constituted. In the fiber, when the vinyl copolymer is a vinyl copolymer obtained by copolymerizing 40 90 parts by mass of an aromatic vinyl monomer and 10 to 60 parts by mass of a cyanogenated vinyl monomer, The compatibility between the salt resin and the maleimide copolymer and the butyl copolymer is further improved, and the glass transition temperature is lowered, and therefore, the fluidity is improved, and thus the extrusion stability, that is, the spinnability is improved. Therefore, while maintaining spinnability at the time of melt spinning, it is necessary to obtain poly-salt ridge vinyl fibers that have a small heat shrinkage even if they are subjected to a secondary cascade treatment after heating at 100 ° C or more. Can be.

[0035] The content of the above-mentioned bullet copolymer is preferably 1 to 30 parts by mass, and more preferably 5 to 25 parts by mass. When the content of the vinyl copolymer is less than 1 part by mass or more than 30 parts by mass, the spinnability becomes poor.

[0036] The vinyl copolymer in the present invention is preferably 40 to 90 parts by mass of an aromatic vinyl monomer, 10 to 60 parts by mass of a cyanide butyl monomer, and is copolymerizable with these monomers. It is a vinyl copolymer obtained by copolymerizing 0.1 to 40 parts by mass of a vinyl monomer other than these monomers. As described above, when the vinyl copolymer is polymerized with the above-mentioned “0.1 to 40 parts by mass of a vinyl monomer other than these monomers copolymerizable with these monomers”, the effect of imparting heat resistance is obtained. The compatibility between the polychlorinated vinyl resin and the maleimide copolymer can be further improved while maintaining the spinning property, so that the heat of 100 ° C or more can be reduced while maintaining the spinnability during melt spinning. Even if it is subjected to secondary processing, it is possible to obtain a poly-shouldered bur fiber having a small heat shrinkage.

[0037] The aromatic vinyl monomer is, for example, an aromatic vinyl monomer selected from styrene, permethylstyrene, bürtoluene, ethynolestyrene, t-butynolestyrene, chlorostyrene, dichlorostyrene, and a substitute thereof. However, it is preferably styrene. The styrene has advantages such as easy adjustment of the resin pressure at the time of spinning, reduction of the screw load, and long-term long-running property. In addition, the aromatic vinyl monomer may be an aromatic vinyl monomer other than the aromatic vinyl monomers mentioned above, as long as the object of the present invention is not violated.

[0038] The biel cyanide monomer is, for example, a cyanyl biyl monomer selected from acrylonitrile, methacrylonitrile, and chloroacrylonitrile, and is preferably acrylonitrile. Acrylonitrile has advantages such as easy adjustment of resin pressure during spinning, reduction of screw load, and long-term long-run property.

[0039] The above-mentioned butyl monomer includes, for example, methacrylate, methacrylate, methacrylate, methacrylate, methacrylate, methacrylate, methacrylate, methyl methacrylate, and methacrylate. And a carboxylic acid selected from the group consisting of:

[0040] The above-mentioned bullet copolymer is preferably a bullet copolymer obtained by copolymerizing 7590 parts by mass of styrene and 10 to 25 parts by mass of acrylonitrile. As described above, when "10-25 parts by mass of acrylonitrile" is polymerized and contained in the above-mentioned bullet copolymer, spinnability is improved.

[0041] The mass average molecular weight of the vinyl copolymer is preferably 50,000 to 110,000, more preferably 60,000 to 100,000. As described above, when the weight average molecular weight of the vinylinole copolymer is 50,000 to 110,000, the compatibility between the vinyl chloride polymer and the maleimide copolymer is further improved.

[0042] The polyvinyl chloride fiber of the present invention is produced by melt-spinning a resin composition having 100 parts by mass of a vinyl chloride resin and 120 parts by mass of a maleimide copolymer. Specifically, (A) a step of mixing a resin composition comprising 100 parts by mass of a butyl chloride resin and 120 parts by mass of a maleimide copolymer with a mixer such as a Henschel mixer or a ribbon blender; (B) a step of melt-spinning the mixed resin composition with a melt extruder such as a single-screw extruder, a bidirectional twin-screw extruder, or a conical twin-screw extruder to obtain fibers; And (D) a step of subjecting the drawn fiber to a thermal relaxation treatment. In the production of the polychlorinated bull fiber of the present invention, it is possible to mix known additives that can be used in a vinyl chloride resin composition, as long as the object of the present invention is not violated. These additives include, for example, lubricants, heat stabilizers, processing aids, reinforcing agents, ultraviolet absorbers, antioxidants, antistatic agents, fillers, flame retardants, pigments, initial color improvers, A conductivity imparting agent, a surface treatment agent, a light stabilizer, and a fragrance.

[0043] The artificial hair of the present invention is composed of the polychlorinated bull fiber according to any one of claims 1-113. As described above, since the artificial hair of the present invention is composed of the polychlorinated bull fiber according to any one of claims 1-113, the artificial hair is subjected to secondary processing by heating at 100 ° C or more. Also, heat shrinkage is small.

(Example 1)

(a) 100 parts by mass of polyvinyl chloride resin (manufactured by Taiyo PVC Co., Ltd., TH-1000), 10 parts by mass of maleimide copolymer (manufactured by Denki Kagaku Kogyo Co., Ltd., AX-40 (see Reference Example 1)) Composite stabilizer obtained by packing polyethylene wax and a special fatty acid ester lubricant into the heat stabilizer of high-mouthed talcite and Ca_Zn metal stone; a lubricant (CP_410A, manufactured by Nissan Chemical Industries, Ltd.) 8 mass And a step of mixing a resin composition having 1 part by mass of a phosphite heat stabilizer (Adeka Stab 1500, manufactured by Asahi Denka Kogyo Co., Ltd.) with a Henschel mixer, (b) the mixed resin A step of melt-spinning the composition from a spinning die having a nosed cross-sectional area of 0.06 mm ² , a number of holes of 120, and a die temperature of 180 ° C. at an extrusion rate of 10 kg / hour to obtain a fiber of 150 decitex; The melt spun fiber is stretched to 300% in an air atmosphere at 100 ° C. (D) subjecting the stretched fiber to a heat relaxation treatment under an air atmosphere at 120 ° C. until the total length of the fiber is reduced to 75% of the length before the treatment. Polychlorinated bur fibers having an average fineness of 66.7 decitex were sequentially obtained.

[0045] (Reference Example 1)

Into an autoclave equipped with a stirrer were charged 10.0 kg of styrene, 15.0 kg of methinoolethylene regetone, and 14 g of α-methinolestyrene dimer, and the inside of the autoclave was replaced with nitrogen gas. The temperature was raised to 80 ° C, and a solution prepared by dissolving 6.2 kg of maleic anhydride and 40 g of benzoyl peroxide in 9.0 kg of methyl ethyl ketone was continuously taken for 8 hours in an autoclave maintained at this state. Then, the mixture was kept for 3 hours while keeping the temperature of the auto tub at 80 ° C to obtain a maleimide copolymer solution. Then, after adding 5.8 kg of aniline and 0.1 kg of triethynoleamine to the maleimide copolymer solution and reacting at 140 ° C. for 7 hours, the reaction solution was supplied to a twin-screw extruder equipped with a vent, Therefore It was degassed to obtain a maleimide copolymer having an average molecular weight of 100,000.

(Example 2)

The same procedure as in Example 1 was repeated except that 20 parts by mass of a vinyl copolymer having an acrylonitrile ratio of 30% by mass (see Reference Example 2) was further added to the resin composition in Step (a) of Example 1. Shii-Dani Bull fiber was obtained.

[0047] (Reference Example 2)

50 kg of pure water, 83 g of potassium persulfate, 400 g of tertiary canolesh phosphate, 400 g of t-dodecyl mercaptan, 40 kg of styrene, 16 kg of atarilononitoninole and 105 g of benzoinolenoside are charged in an autoclave equipped with a stirrer. After the inside was replaced with nitrogen gas, the temperature inside the autoclave was raised to 100. C, and 5.3 kg of styrene was added to the autoclave over 2 hours.Then, the temperature inside the autoclave was increased to 103 ° C, and 8 kg of styrene was added to the autoclave over 3 hours. . Then, the temperature inside the autoclave was raised to 110 ° C and polymerization was performed for 1 hour in this state.After that, the temperature inside the autoclave was raised to 120 ° C and polymerization was performed for 1 hour in this state. The polymerization was completed. The polymer solution after the completion of the polymerization was cooled, neutralized by adding hydrochloric acid thereto, and the neutralized polymer solution was dehydrated and dried to obtain a vinyl polymer having an average molecular weight of 80,000.

(Example 3)

15 parts by weight acrylonitrile amount of Bulle copolymer (i.e., a § click Lilo two Toniru amount in Reference Example 2 9. 4 kg) except that acrylonitrile ratio in the can was Biel copolymer 15 weight ^_0/0 In the same manner as in Example 2, a polychlorinated vinyl fiber was obtained.

(Comparative Example 1)

A polychlorinated vinyl fiber was obtained in the same manner as in Example 1 except that the amount of the maleimide copolymer in the resin composition in the step (a) of Example 1 was changed to 0.5 part by mass.

(Comparative Example 2)

A polychlorinated vinyl fiber was obtained in the same manner as in Example 1, except that the blending amount of the maleimide copolymer in the resin composition in the step (a) of Example 1 was changed to 30 parts by mass.

(Comparative Example 3)

Weight average molecular weight of maleimide copolymer in the resin composition of step (a) of Example 1 Was changed to 40,000, and a polychlorinated biel fiber was obtained in the same manner as in Example 1.

(Comparative Example 4)

A polychlorinated vinyl fiber was obtained in the same manner as in Example 1, except that the weight average molecular weight of the maleimide copolymer in the resin composition in the step (a) of Example 1 was 160,000.

(Comparative Example 5)

A polychlorinated Bull fiber was obtained in the same manner as in Example 2 except that the blending amount of the Bull copolymer having an acrylonitrile ratio of 20% by mass was changed to 60 parts by mass.

(Comparative Example 6)

A polychlorinated bull fiber was obtained in the same manner as in Example 3, except that the acrylonitrile ratio of the bull copolymer was changed to 5% by mass.

(Comparative Example 7)

A polychlorinated vinyl fiber was obtained in the same manner as in Example 3 except that the acrylonitrile ratio of the bullet copolymer was changed to 40% by mass.

(Comparative Example 8)

A polychlorinated vinyl fiber was obtained in the same manner as in Example 3, except that the weight average molecular weight of the Bier copolymer was changed to 30,000.

(Comparative Example 9)

A polychlorinated vinyl fiber was obtained in the same manner as in Example 3, except that the weight average molecular weight of the Bier copolymer was set to 130,000.

[0058] As described above, the polyvinyl chloride fibers obtained in Example 13 and Comparative Example 119 were evaluated by the following method.

[0059] (1) Heat shrinkability

The heat shrinkability was evaluated by measuring the heat shrinkage generated when the test piece was heat-treated. That is, the heat shrinkage was determined by measuring the ratio of the lengths of the test specimens before and after leaving 12 specimens of polyvinyl chloride fiber adjusted to 100 mm length in a gear oven at 100 ° C for 15 minutes. (Length before neglecting-length after neglecting) Z The length before neglecting) is calculated, and the average of 10 median values excluding the maximum and minimum values out of 12 is calculated. It was obtained.

[0060] The evaluation criteria are as follows: 〇: Heat shrinkage less than 5%

X: Heat shrinkage of 5% or more

Wear

It was.

[0061] (2) Spinnability

The spinnability was evaluated based on the spinnability when melt spinning the resin composition. That is, the spinnability test described above was conducted by extruding 120 fibrous materials simultaneously from a spinning mold for 90 minutes (measurement time: 30 minutes X measurement times: 3 times). This phenomenon was carried out by measuring the number of occurrences.

[0062] The evaluation criteria are:

〇: Number of occurrences of thread breakage 0

△: Thread break occurrence 1 time

X: Thread break occurs more than once

It was.

[0063] (3) Long run stability

The long-run stability was evaluated based on the resin pressure of the extruder, which is a standard for performing spinning in a stable state for a long time (24 hours or more) during continuous spinning.

[0064] The evaluation criteria are:

〇: Extruder resin pressure is 30MPa or less

△: Resin pressure of extruder is 30-40MPa

X: Extruder resin pressure is 40MPa or more

It was.

[0065] The evaluation results are shown in Table 1 below.

[Table 1] Example Comparative Example

1 2 3 1 2 3 4 5 6 7 8 9 Heat shrinkability 〇〇 OX o O 〇〇〇〇 OO Spinnability △ 〇 OOXXXX △ MM XX Long run stability Δ MM OOXXXXXXXX Table 1 shows that the fibers obtained in each of the examples of the present invention were at a usable level (〇 or △) in heat shrinkability, spinnability, and long run stability. It can be seen that the level is the best (〇) for each evaluation item. On the other hand, it can be seen that the fibers of Comparative Examples 19 to 19 have some problems.

Industrial applicability

[0067] The polyvinyl chloride fiber of the present invention is used as 1S suitable for artificial hair, insect nets, brushes and the like, and preferably as artificial hair for hair decoration or artificial hair for doll hair.

[0068] The artificial hair of the present invention is made into, for example, a wig, a hair piece, a blade, an extension hair, and an accessory hair by bundling and preparing the hair.

Claims

The scope of the claims

[1] A poly-Shidani Bul fiber comprising a resin composition having 100 parts by mass of a poly-Shidani Bule resin and 1 to 20 parts by mass of a maleimide copolymer.

[2] The maleimide copolymer is a maleimide copolymer obtained by copolymerizing 1 70 parts by mass of an aromatic vinyl monomer and 30 to 85 parts by mass of an unsaturated dicarbonimide derivative. The polyvinyl chloride fiber according to claim 1, wherein:

[3] The maleimide copolymer is composed of 15 to 70 parts by mass of an aromatic vinyl monomer, 30 to 85 parts by mass of an unsaturated dicarbonamide derivative, and 0.1 to 25 parts by mass of an unsaturated dicarboxylic anhydride. And a maleimide copolymer obtained by copolymerizing 0.1 to 40 parts by mass of a vinyl monomer other than these monomers copolymerizable with these monomers. The polychlorinated bull fiber according to claim 1.

4. The polyvinyl chloride fiber according to claim 2, wherein the aromatic vinyl monomer is styrene.

5. The polychlorinated vinyl fiber according to claim 1, wherein the unsaturated dicarboxylic acid imide derivative is N-phenylmaleimide.

6. The polychlorinated vinyl fiber according to claim 3, wherein the unsaturated dicarboxylic anhydride is maleic anhydride.

[7] The polychlorinated bull fiber according to any one of [16] to [16], wherein the maleimide copolymer has a mass average molecular weight of 60,000 to 140,000.

[8] Polychloride butyl resin composed of a resin composition having 100 parts by mass of polychloride butyl resin, 120 parts by mass of maleimide copolymer, and 130 parts by mass of butyl copolymer In the fiber, the bullet copolymer is a bullet copolymer obtained by copolymerizing 40 to 90 parts by mass of an aromatic vinyl monomer and 1060 parts by mass of a vinyl cyanide monomer. Characterized by polyvinyl chloride fiber.

[9] The above-mentioned bullet copolymer is composed of 40 to 90 parts by mass of an aromatic butyl monomer, 10 to 60 parts by mass of a butyl cyanide monomer, and a monomer thereof copolymerizable with these monomers. 9. The polyvinyl chloride fiber according to claim 8, which is a vinyl copolymer obtained by copolymerizing 0.1 to 40 parts by mass of a vinyl monomer other than a polymer.

[10] The polychlorinated vinyl fiber according to claim 8 or 9, wherein the aromatic vinyl monomer is styrene.

[11] The cyanide butyl monomer force is acrylonitrile.

Polychlorinated bullet fiber according to item 1, wherein the force is 0.

12. The bullet copolymer according to any one of claims 8 to 11, wherein the bullet copolymer is a bullet copolymer obtained by copolymerizing 75 to 90 parts by mass of styrene and 10 to 25 parts by mass of acrylonitrile. Polyvinyl chloride fiber according to claim 1.

[13] The polyvinyl chloride fiber according to any one of [812], wherein the mass average molecular weight of the bullet copolymer is 50,000 110,000.

[14] A process for producing a polyvinyl chloride fiber, comprising melt-spinning a resin composition comprising 100 parts by mass of a polychlorinated butyl resin and 112 parts by mass of a maleimide copolymer.

[15] An artificial hair characterized by being composed of the polychlorinated bull fiber according to any one of claims 113.