JPS61163951A - Polymer resin material for templating head of wig - Google Patents

Abstract

PURPOSE:To provide the titled material which has excellent reproducibility and can be reused and easily worked, by mixing a specified quantity of a crystal line high trans-butadiene polymer with other polymer resin component. CONSTITUTION:30-90wt% crystalline high trans-butadiene polymer having a bonded trans contact of 754n95%, a weight-average MW of 30,000-500,000 and a molecular weight distribution of 1.2-5.0 is mixed with 70-10wt% other polymer resin component such as trans-isoprene polymer, trans-polyoctenamer or caprolactone polymer to obtain a polymer resin component. If desired, 1-30pts.wt. palsticizer (e.g. dibutyl phthalate), 1-100pts.wt. inorg. filler, stabi lizer, pigment, etc. are added to 100pts.wt. said resin component, and the mixture is mixed at 60-200 deg.C, optionally in the form of a soln. in a solvent.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a female mold for producing a wig base that is easy to use, has excellent moldability, and is recyclable. It relates to resin materials. Specifically, a thin plate made of a polymer resin material that can be heated and molded at a relatively low temperature and hardens when cooled to room temperature is heated and softened, pressed against the head to be molded, and then cooled and hardened. This invention relates to a resin material for molding the head of a wig to make it a female.

(Prior Art) One of the conventional methods of making a head impression of a wig is the following method. First, the head is covered with a flexible synthetic resin film such as a vinyl chloride polymer film, which is then wrapped with adhesive tape, and then the entire surface is covered with adhesive tape and molded.

Next, this is used as a female mold, and a film of lano or synthetic resin is formed on the surface, and this is peeled off to obtain a wig paste. However, this method has the major drawback that, in addition to complicated operations, it is impossible to obtain a wig base that accurately reproduces the shape of the head due to shrinkage and deformation of the resin film and adhesive tape.

On the other hand, JP-A-55-116804 discloses a method of obtaining a female mold by heating and softening a thin plate of transisoprene polymer, pressing it against the head, and cooling and hardening it.

(Problems to be Solved by the Invention) Although the head molding method using the above-mentioned transisoprene polymer has the excellent feature that the molding operation is simple and easy, the reproducibility of the molding is not necessarily high. It wasn't good enough. Furthermore, trans isopre heptapolymer is expensive and it is desirable to reuse it, but since the polymer is easily decomposed, it becomes difficult for the recycled resin to crystallize, making it impossible to reuse scrap. Ta.

(Means and effects of rounding to solve the problems) The present inventors have arrived at the present invention as a result of intensive studies to improve the drawbacks of the above-mentioned trans isopre heptapolymer resin.

Specifically, the present invention is a polymeric resin material for removing the head of a wig, which contains at least 30% by weight of a crystalline high trans-butadiene polymer.

The essential polymer resin component in the present invention is a butadiene polymer with a high trans-bond content, which exhibits crystallinity at room temperature. A particularly preferred structure of a crystalline high trans-butadiene polymer is as follows. First, the trans bond rate measured by the Morello method using an infrared spectrophotometer is 75 to 95%, and the weight average molecular weight (My) measured by glupermeation chromatography is 30%.
,000 to soo, ooo and molecular weight distribution (R1v/Mn) indicated by the ratio of weight average molecular weight to number average molecular weight
is in the range of 1.2 to 5.0.

Normally, the polymer resin component of the polymer resin material for head molding is preferably a crystalline high trans-butadiene polymer alone, but depending on the operating conditions etc. In order to improve properties such as properties, strength, and operability, it may be preferable to use a mixture with other polymer resins. However, even in this case, unless at least 30% by weight of the crystalline high trans-butadiene polymer is contained as a polymer resin component, the effects aimed at by the present invention cannot be sufficiently exhibited.

Particularly preferable examples of other polymer resin components to be mixed include trans isoprene polymer, trans polyoctenamer, and caprolactone polymer.

The crystalline high trans-butadiene polymer in the present invention is! The tadiene monomer may be combined with, for example, a barium, strontium or calcium compound and an organolithium compound and/or an organomagnesium compound, as the case may be.
In addition, a homogeneous composite catalyst consisting of an organoaluminum compound (
JP-A-55-311827, JP-A-56-112
916) or a homogeneous composite catalyst consisting of a lanthanide P transition metal compound such as lanthanum and an organometallic compound such as organomagnesium. Can be done.

As the trans-isoprene polymer mentioned in the present invention, for example, Kuran TP-301 manufactured by Clareisoprene Chemical (2) can be used. Further, as the transpolyoctenamer, for example, Vestenamer-8012 and Pestenamer A9 manufactured by Huls can be used. Furthermore, as a caprolactone polymer,
For example, manufactured by Daicel Chemical Industries ■! Laxel H-7, Nokcel H-4, and Nokcel H-1 can be used.

In the polymer resin material for making a wig head mold of the present invention, in addition to the above polymer resin components, a plasticizer and an inorganic filler may be added as necessary to adjust hardness, plasticity, etc. . Further, stabilizers, pigments, etc., which are general additives added to polymer resin materials, can be appropriately added in the case of the present invention as well as in conventional resin materials.

The amount of plasticizer used usually ranges from 1 to 30 parts by weight per 100 parts by weight of polymeric resin component.

Examples of plasticizers include dibutyl phthalate, di(2-
(2-ethylhexyl) adipate, diethylene glycol dibenzoate, butyl stearate, butyl epoxy stearate,
Tri(2-ethylhexyl)phosphate and the like can be mentioned.

The amount of inorganic filler used is from 1 to 100 parts by weight per 100 parts by weight of polymeric resin component. Examples of inorganic fillers include calcium carbonate, silicic acid, calcium silicate, clay,
Examples include talc, mica, bentonite, and the like.

The polymeric resin material of the present invention can be easily manufactured by mixing in an extruder, a two-darker, or the like. Although the set temperature of these devices can be freely selected within the range of 60 to 200°C, it is preferably set to 80 to 180°C. Alternatively, they can be dissolved in a suitable solvent and mixed in the solution.

(Effects of the Invention) The polymer resin material for making a head mold of a wig provided by the present invention is simple and easy to operate for making a head mold, has excellent reproducibility in deaf molding, and is free from scraps. It has the feature that it is possible to reuse it.

(Example) In order to explain the present invention in more detail, Examples of the present invention are shown below.

Examples 1 to 9, Comparative Examples 1 to 3 A total of 100 g of trans-butadiene polymer, trans-isoprene polymer, trans-polyoctenamer, and casirolactone polymer with the composition shown in Table 1 was weighed out, stirred well, and heated at 140°C. 1 Zeblast mill (manufactured by Toyo Seiki Seisakusho) set to K, screw rotation speed 5 O
After kneading at rpm for 5 minutes, a polymer resin material was obtained. The obtained polymer resin material was press-molded at 120° C., and its deformation temperature, hardness, and head molding moldability (reproducibility) were tested. Furthermore, scrap reusability was evaluated by repeating the process of kneading and press molding five times under the same conditions as above, and then evaluating the hardness of the molded resin after cooling it at room temperature for 30 minutes.

Although its physical properties vary depending on the structure of the trans-butadiene polymer, the resulting resin material has sufficient hardness of 85 or higher, has excellent moldability, and the hardness of recycled test products is 85 or higher. It can be seen from Table 1 that the resin material is rich in crystalline butadiene polymer with a high trans content.

Margin below

Claims (5)

[Claims] (1) Polymer resin material for making a wig head mold containing at least 30% by weight of a crystalline high trans-butadiene polymer as a polymer resin component (2) The crystalline high trans butadiene polymer has a trans bond content of 75 to 95% and a weight average molecular weight (@M@w) of 3.
0,000-500,000 and molecular weight distribution (@M@
A polymer resin material for making a wig head mold according to claim (1) having a structure of w/@M@n) 1.2 to 5.0. (3) Claims (1) and (2), wherein the polymer resin component comprises 30 to 90% by weight of a crystalline high trans-butadiene polymer and 70 to 10% by weight of a trans-isoprene polymer. Polymer resin material for wig head molding (4) Claims (1) and (2), wherein the polymer resin component comprises 30-90% by weight of crystalline high trans-butadiene polymer and 70-10% by weight of trans-polyoctenamer. Polymer resin material for wig head molding (5) The polymer resin component is 30 to 90% by weight of a crystalline high trans-butadiene polymer and 70% by weight of a caprolactone polymer.
Polymer resin material for making a wig head mold according to claims (1) and (2) comprising ~10% by weight