JPS5976906A - Artificial hair material - 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 The present invention relates to a technology for improving artificial hair materials, and in particular, by improving mechanical properties and gloss, it is possible to suppress metallic luster and create artificial hair with a luster close to that of natural hair. It is related to hair.

Traditionally, fibers made of synthetic resin have been used for wigs, hair transplants, etc., but these synthetic fibers are made of polyvinyl chloride, a combination of vinyl chloride and acrylonitrile, etc. It was smooth and had a metallic luster, and I couldn't help but feel uncomfortable when wearing it. Furthermore, although this synthetic fiber has low heat resistance and is easily heat-set, its shape retention is insufficient, and furthermore, its solvent resistance and mechanical strength are unsatisfactory.

The present invention is an artificial hair made of a new shape and structure and a new material, which fundamentally improves the problems of the prior art.

First, the artificial hair material of the present invention has a double structure consisting of a matrix and a covering material, and has a core and a sheath in cross section. The coating material has gloss, abrasion resistance,
Solvent resistance can be shared.

In addition, artificial hair materials with a double structure can form fine irregularities on the surface, and exhibit an effect similar to the scale of natural hair. , there are also findings that lead to conjugation with high friction coefficients.

Furthermore, compared to natural hair, artificial hair can have a harder surface and can be set better with heat or chemicals than natural hair.

The present invention is an artificial hair material with a double structure obtained as a result of intensive research aimed at such improvements.

The present invention is a double-structured artificial hair material consisting of a core and a sheath, and the core is made of nylon 6, nylon 66 or nylon 12.
The substrate is made of polyamide fibers of 10 to 50 deniers, and the sheath is a thermosetting composition made of an acrylonitrile-butadiene copolymer and a phenolic resin compatible with the core copolymer. (The component ratio of the copolymer and the phenolic resin is 0.4:1 to 1 by weight)
(preferably in the range of 4:1), the artificial hair material is coated around the substrate and has a thickness of 0.5 to 15 μm.

The present invention will be explained.

A method for producing double-structured composite fibers consisting of a core and a sheath by spinning a hzz type of polymer or t-polymer solution from a double spinning nozzle, and a method for producing a single fiber in advance using a conventional spinning (drawing) technique. There is a method in which other polymers are attached around this single fiber after it has been obtained. Although the artificial hair material of the present invention can be treated with the former method, the latter surface treatment method is suitable.

In order to avoid the smooth surface that is observed when core-sheath structure fibers are melt-molded, and aim to form surface irregularities similar to the scales on the hair surface, in the present invention, the fiber surface is coated with a resin-rich resin of a certain thickness. A solution is applied.

The core portion of the artificial hair of the present invention corresponds to the matrix of natural hair,
The S-substance of the sheath portion corresponds to the cortical layer containing scales on the surface of natural hair.

Therefore, the substrate material of the present invention was examined for natural hair growth fibers, and it was found that polyesters such as polyhexamethylene phthalate, polybutyne/terephthalate, and polyamides such as nylon 6, nylon 12, and nylon 66 were used for natural hair growth fibers. Fiber diameter similar to (30 to 60 μm in diameter)
It was discovered that the same degree of flexibility (bending hardness), Young's modulus, rigidity modulus, etc. was exhibited when As a result, it was found that polyamide synthetic fiber containing nylon 6 is preferable as a substrate.

In the present invention, polyamide-based synthetic fibers include not only a single polymer but also other polymers and plasticizers.

Polymer blends and monomer compositions containing additives and the like can be applied. Of course, spun-dyed fibers containing dyes or pigments are preferred, and the polyamide synthetic fibers may be those obtained by melt spinning (wet spinning can also be used). The fiber diameter is preferably selected within the range of 10 to 50 deniers and 8 degrees, taking into account the hardness of the bend.

The coating material γ↓ of the artificial hair material of the present invention is a composition of an acrylonitrile-butadiene copolymer and a phenolic resin that is compatible with this copolymer. The weight ratio of the composition material used as the material to be machined is in the range of 0.4:1 to 4:1 between copolymer and phenolic hammer fat.

Here, the acrylonitrile-butadiene copolymer preferably has an acrylonitrile content of about 28 to 421 M%. When the acrylonitrile content is less than 28%, the composition can be used for washing rT4I (stain removal), heat setting,
It has the disadvantage of poor durability against solvent treatments, etc.

The acrylonitrile content in the trench exceeds 42%. In this case, the workability when coating a polyamide fiber substrate becomes low.

The reason for this is that when an excessive amount of acrylonitrile is contained, the solvent solubility becomes low.

The acrylonitrile-butadiene copolymer serving as the storage part of the present invention may also contain units derived from common comonomers such as styrene, acrylic acid, and methacrylic acid.

The phenolic resin, which is another component of the composition, is a resin obtained from one part of phenol and at least one part of aldehyde, or a modified product thereof, and is compatible with the above-mentioned acrylonitrile-butadiene copolymer. It is something that you have.

In the case of a copolymer with a relatively high acrylonitrile content, ordinary phenol-formaldehyde initial condensates may also be used, but oil-soluble phenolic resins are generally preferred; examples include natural resins such as rosin. Also, initial condensation of formaldehyde with phenolic resins modified with natural fats and oils such as L-cashew nut shell oil and substituted phenols with ak substituents such as tertiary butyl, tertiary amyl, phenyl or cyclohexyl. There are things. Commercially available rDurey 12687J and rDurey
11098J (Durey PlaMtics 8
Chem-1aal Inc, ), rc, g, R
55ln 12316j and rG,E.

Re5in 12393J (General El
etric Co.).

rsynco 721J (Snycl@r Chem
ical Co.), l-8P-12J and rsp-8
014J (Shenectically Re5ins
8 Varni-sh Co, ), rCKRA 197
7J and rBKR262oJ (Hake-eye te C
o,) are oil-soluble phenolic resins that can be suitably used for the purposes of the present invention.

Since the coating portion is applied to the surface of the polyamide fiber, the polyamide fiber substrate may have a smooth narrow surface and a strong luster. The nucleated material composition is selected based on coating strength, softness, flexibility, strength of the coating material itself, etc., and is also selected based on mulberry resistance and weather resistance (light resistance).

As mentioned above, the resin composition that becomes the covering part of the artificial hair material of the present invention has a mixture of acrylonitrile-butadiene and phenolic resin (weight ratio) of 0.4:1 to 4.
:1, preferably 0.6:1 to 3:1.

If the content of the phenolic thread resin component in the coating is too small, the strength, chemical resistance, and adhesion to the substrate will be insufficient, while if it is too large, the flexibility and flexibility of the coating will be insufficient. Due to its poor flexibility, artificial hair tends to dissociate from the matrix fibers due to repeated stretching, bending, or friction.

The cured resin of the acrylonitrile-butadiene copolymer and phenolic resin may further contain phenolic 4F411) hardeners and thickeners, anti-aging agents and other additives such as hexamethylene lentithramine. It can contain.

The thickness of the coating applied to the fibrous oak substrate is limited by the need to function as a hair substitute. The lower limit of the thickness of the coating material is 0.5 μm, which means that the coating material has a predetermined appearance, suppression of metallic luster, fatigue resistance (damage to the coating material due to bending, wearing, etc., occurrence of cracks), Washing resistance (washing, etc.).

Determined by wear resistance etc. Further, the upper limit of the thickness of the coating film depends on the thickness of the substrate, but if it exceeds 15 μm, it is hardly practical.

The composition of acrylonitrile-butadiene copolymer and phenolic resin is dissolved in a volatile solvent to form a paste. Preferred bath agents for cultivated crops include methyl ethyl ketone, methyl isobutyl ketone and other ketones; base hydrocarbons such as ethane dichloride; esters such as ethyl acetate; nitrohydrocarbon beds such as ethane dichloride; and mixtures thereof. and a diluent such as toluene.

A thickener, anti-aging agent, other additives, and a curing agent for the phenolic thread resin can be appropriately blended into the paste.

The paste can be applied to the substrate fibers by dipping, spraying or other means. If necessary, pass the coated fiber through the slit.Adjust the pick-up of the paste from K to 16° and then pass the fiber through the slit, for example 80°C'-1-20°C.
For example, after pre-drying at a temperature of 12.0 to 210℃
When heat-treated at a temperature of You can get artificial hair.

Ren's hair dye can be dyed with dye to the desired color, and since it is pre-applied with pigment, there is no need to dye it afterwards. Of course, as mentioned above, the fiber matrix can be colored in advance, and by creating a slight difference in tone between the matrix and the mnemonic material, it is possible to create deep colors and luster. .

As described above, the artificial hair material L1 of the present invention can be obtained by first producing polyamide fibers 5 and then applying a resin composition to the surface using the fibers as a substrate.

Since the substrate of the artificial hair material of the present invention is a polyamide-based synthetic fiber, it has higher heat resistance and better heat setting properties than conventional modacrylic fibers or polyvinyl chloride fibers.

Furthermore, it has excellent strength, elongation at break, and abrasion resistance, and as a synthetic fiber, it has favorable flexibility and texture, and is easy to dye. Furthermore, it is easy to produce monofilaments with a fineness comparable to that of hair.

Without impairing the advantages of such basic p-fibers, it has an a-quality coating that suppresses the glittering properties of polyamide fibers and avoids a waxy feel. The coating layer applied to the surface of the fibers is not smooth but has fine irregularities, so it also produces an effect on a scale similar to that of natural hair. Additionally, the coating material can provide hardness and improve chemical resistance.

As described above, the artificial hair material of the present invention is excellent and has practicality.

Example carbon black 3.5 ill and titanium oxide 0.5
Nylon 6 pellets with an intrinsic viscosity of 1.02 and containing a heavy electric chain were melt-spun by a conventional method and then stretched 3.8 times cold to obtain a 38-denier monofilament. This fiber had a glossy black color.

Acrylonitrile content is 35:1i as pupil-break resin
-4l1% acrylonitrile-butadiene copolymer was used, and rG, which is commercially available as an oil-soluble phenolic resin, was used.
, E, Re@in t2393J was used.

A paste was prepared by dissolving the two in methyl ethyl ketone at a mixing ratio of 1:1.

Next, the nylon 6 fibers were immersed in this paste, guided through a comb-shaped slit to adjust the thickness of the coating resin to about 8 μnr, and pre-dried in a vacuum dryer (65°C, 5-6 mnHg). 3 hours) and further heat-treated at 180° C. for 40 minutes.

The obtained fibers had a subdued luster, the metallic luster had disappeared, and they closely resembled natural hair.

Claims (3)

[Claims] (1) A fibrous substrate and a coating that covers the surface of the substrate.
An artificial hair material consisting of an acrylonitrile-butadiene copolymer and a 7-enol AT fat compatible with the copolymer, wherein the substrate is not a polyamide fiber; An artificial hair material characterized in that it is a synthetic hair composition and the thickness of the coating is 0.5 to 15 microns (μm). (2) The component ratio of acrylonitrile-butadiene copolymer and phenolic resin is 0.4 in weight ratio:
2. An artificial hair material according to claim 1, comprising a covering material having a ratio of 1 to 4:1. (3) Nylon 6, nylon 66 or nylon 12
A patent claim in which the surface of a polyamide fiber of 10 to 50 denier is coated with a curable resin composition to a thickness of 0.5 to 15 μm, and has a subdued luster and durability with a substrate and texture. The artificial hair material according to item 1 or 2.