JPS5898407A - Production of wig base - Google Patents

Abstract

(57) [Abstract] 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 method for manufacturing a wig base. More specifically, we will refer to a method for manufacturing a wig base, which comprises applying a male type K wig base coating.

Can be softened and molded by heating at relatively low temperatures,
When cooled to room temperature, a heat-movable synthetic resin sheet that can be molded and cured while retaining its elastic shape, such as trans-L4-polyinprene seed, is heated and forced against the head to form a female mold. To manufacture a wig base, fill the female mold with plaster to form a male mold, and apply a synthetic resin solution as a wig base coating agent, such as a urethane prepolymer solution, to the molded 11K wig. Japanese Patent Publication No. 55-116
It is described in Publication No. 804.

However, when the male mold is molded from an inorganic material such as gypsum, clay, or cement, VC#i has the following disadvantages.

(1) If water is used during molding, aging must be performed for sufficient time to dry and remove the water, and if the water is not completely removed, it may be used as a wig paste coating. Not only is the crosslinking reaction of the commonly used wig prepolymer not carried out sufficiently, but the carbon dioxide gas generated by the abnormal reaction causes bubbles to exist in the wig paste9, which reduces the strength of the wig base coating. Not only does it significantly reduce the amount of water, but it also causes deterioration of the appearance, such as clouding.

[Normal reaction]

-NC○+-0H--伽-NHCOO- [Abnormal reaction] -NCO+Hs O--NHC'0O) (-NHCOO
H+-NCO→-NHCONH+CO+11 (2) Due to the physical and chemical adhesion on the surface of the male mold, it is generally difficult to peel off the particles formed thereon, and in extreme cases, it may not be possible to peel off, or it may not be possible to peel off. Deformed or damaged,
Contamination with gypsum often occurs. For this reason, a release agent such as fluororesin or silicone is coated on the male mold in advance to improve the releasability of the wig paste from the male mold. As shown in the results, not only does it have almost no effect on improving release properties, but also there are many cases of contamination of foreign matter and generation of air bubbles caused by the male mold material, and it is difficult to prevent the occurrence of defective products. They are also lacking in ability.

In place of inorganic male mold materials that have these drawbacks, it is possible to use positive cement made of epoxy resin and hardener, but male molds molded from such organic materials are not only expensive. Instead, it dissolves or swells in the synthetic resin solution of the wig paste coating applied to its surface, thus leading to not only mutual welding but also deformation of the male mold itself.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for applying a wig paste coating to molds made of inorganic or organic materials that do not suffer from such drawbacks.

That is, the present invention relates to a method for producing wig paste, and the production of wig paste involves applying a synthetic resin film heated and softened onto the male die when applying a synthetic resin solution as a wig paste coating agent to the male die. This is done by pressing and fixing without wrinkles or sagging, and then applying the synthetic resin solution.

As the molding material for the male mold, inorganic materials such as gypsum, clay, and cement, or organic materials such as glass cement, epoxy resin, silicone, and polyurethane can be used singly or in combination. AM VCFi molded from these molding materials, synthetic resin films that are inert to wig paste coatings and have appropriate surface elongation, for example, thickness L5 or less, general [1jL5 ~
A polyethylene film having a thickness of 10μ, preferably about 1J500 to 100μ is heated to soften it and cover it in a good condition, and while stretching the film appropriately, press it in a thin state without wrinkles or sagging, as if the surface was coated. A similar condition is maintained, and then the overlapping film is fixed using a rubber band or other means at the lower part of the male mold. Coating of a synthetic resin solution as a wig paste coating agent, such as a urethane prepolymer solution, can also be carried out on a synthetic resin film placed over a male mold. After covering the wig in this condition and fixing the thin fabric using a rubber band or the like at the lower part of the male die, the wig paste coating t-m may be applied thereto. For thin fabrics, materials that are inert to Katsura Pace Coating 41K, such as nylon monofilament, multifilament, or these conjugate yarns, are knitted and covered with a synthetic resin film during fabrication. The following advantages can be obtained from KotoK.

(1) For example, even if the male mold is made of a material in which moisture is present, such as a male mold made of plaster, it is possible to coat it with urethane greborimer without suffering from the negative effects of moisture. This makes it possible to effectively use inexpensive gypsum, which is generally widely used as a molding material.

(2) The wig paste can be removed from the male mold very easily, and work efficiency is significantly improved.

(3) There is no damage to the wig paste wave membrane upon peeling, and no deformation of the wig paste due to adhesion or adhesion is observed.

(4) Foreign matter such as plaster pieces is completely prevented from entering or adhering to the wig paste, thereby preventing defects due to foreign matter and improving workability in terms of labor and other aspects of inspection.

(5) Wig pace has a smooth inner surface, which improves workability when working with Japanese cypress hair.

This is done by wrapping a synthetic resin film.
By the method of the present invention, it is possible to easily obtain wig laces that are excellent in each rare property.

Next, the present invention will be described in detail with reference to examples.

Example 1 Trans-1,4-polyisoprene sheet (300 x 3
50 x 2 m) on the mold, soften it in hot water at about 80°C, cool it down moderately, press it partially against the #'i head mold with both hands, and hold it there for about 10 minutes until it cools and hardens. After maintaining the condition, it was removed and a female mold of the specified head shape was made.

600 g of gypsum suspended in 1 liter of water is poured into the female mold thus obtained and left to stand for about 20 minutes to obtain a solidified male gypsum mold. At this time, a container filled with an appropriate amount of water is placed in the center of the plaster poured into the female mold, and removed before the plaster completely hardens.
Not only does it require less gypsum, but the heat generated as the gypsum hardens can be exchanged with the water in the container to facilitate curing, and the container can then be turned upside down. A male plaster mold can be placed there and used as a workbench for applying male mold K wig paste paint.

Polyethylene film (350X350Xα3m1m)
Stretch and hold it in a mold, heat it in a hot air heater to 110'CK to soften it, quickly press it onto the male plaster mold, stretch it sufficiently so that there are no wrinkles or sag, and make a male mold. After placing the mold in close contact with the mold to make it appear as if the surface is coated, fix the lower part of the male mold with a rubber band.

After applying a urethane prepolymer solution to the polyethylene film surface of the male wig paste mold prepared in this manner, the wig paste is aged, dried, and peeled off to obtain a finished wig paste.

Comparative Example 1 In Example 1, polyethylene film Ratsubin f'
Silicone coating was applied instead of

Example 2 In Example 1, a 1 m cement male mold was used in place of the plaster male mold.

Comparative Example 2 The same as in Example 2 except that silicone coating was applied without polyethylene film wrapping.

Example 3 In Example 1, a male mold made of epoxy resin (Japanese 111cPB-17) was used instead of a male plaster mold.

Comparative Example 3 The same as in Example 3 except that silicone coating was applied without polyethylene film wrapping.

The results obtained in each of the above examples and comparative examples are shown in the following table. In addition, in the epoxy resin male mold of Comparative Example 3, the mold was partially dissolved by the coating material, making it virtually impossible to mold the wig paste.

Number of front test pages 20 12 20 10 2
0 Appearance of 10 pace Good Slightly poor Good Slightly poor Good - Number of defects 040
U-Procedural Amendment (Voluntary) January 18, 1980 Haruki Shimada, Commissioner of the Japan Patent Office 1. 11 indications lid Japanese 56th Patent - No. 19 Ro 449 λ Name of invention Wig-based creation method & Amendment person 4, agent address: 1-2-7 Shiba Daimon, Minato-ku, Tokyo - ``By heat exchange with the bridge described in the detailed description of the invention in the specification of Knee Building No. 501'' t-^U.

Claims (1)

[Scope of Claims] 1. When applying a synthetic resin solution as a wig base coating to a male mold, after pressing a heated and softened synthetic resin film onto the male mold without wrinkles or sagging, Synthetic resin solution tj! 811. Method for manufacturing a wig base. 2. Claim 1 in which a plaster mold is used as the male mold
Method for manufacturing wig base as described in Section 1. & The method for producing a wig base according to claim 1, wherein a urethane prepolymer solution is used as the synthetic resin solution. The method for producing a wig base according to claim 1, wherein a polyethylene film having a thickness of L5 m or less is used as the polarized synthetic resin film. The method for producing a wig base according to claim 1, wherein the Xa* wig base coating agent is applied onto the Δ synthetic resin film. A method for producing a wig base according to claim 11, wherein a thin fabric is placed over a synthetic resin film without wrinkles or sagging, and a wig base coating agent is applied thereon.