JP2002201517A - Hand mold and method for producing glove using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide both a hand mold of a glove for dip molding capable of suitably regulating the thickness of a film according to region of the glove and realizing the regulation by a simple method and a method for producing the gloves. SOLUTION: This hand mold 10 is used for producing the glove by dip molding using a rubber latex or a resin emulsion and a plurality of regions different in specific heat capacity is provided on the surface of the hand mold 10. The surface of the hand mold 10 is such that the specific heat capacity in a region 30 corresponding to a thick part of the rubber or resin film formed on the surface 10 is preferably higher than that in other regions and specifically the difference in the specific heat capacity is more preferably >=150 J/(kg.K). In the method for producing the glove the hand mold 10 is dipped in the rubber latex or resin emulsion and the film of the rubber or resin is formed on the surface of the hand mold 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand mold used for producing a non-support type glove by a heat-sensitive method using a rubber latex or a resin emulsion.

[0002]

2. Description of the Related Art Conventionally, a method for producing gloves by dip molding includes (1)
A method of applying a coagulation liquid to a glove mold and immersing it in rubber latex or resin emulsion (coagulation liquid method),
(2) A method in which the viscosity of the rubber latex or resin emulsion in which the glove mold is immersed is increased in advance, and a film is formed using the viscosity of the latex or the like (viscosity pickup method), or (3) rubber latex or There is known a method in which a heat-sensitizing agent is added to a resin emulsion, and a preheated glove mold is immersed to thermally coagulate (thermosensitive method).

In the method of manufacturing gloves according to these methods, for example, in order to thicken a part such as a sleeve part, the above-mentioned method is used.
A method is known in which after forming a film on a glove mold by the methods (1) to (3), a rubber latex or a resin emulsion is sprayed only on a portion (for example, a sleeve portion) where the film thickness is increased. However, this method has a problem that the loss of the rubber latex and the resin emulsion is large, and that the number of steps for forming the film increases, and that the effect of increasing the film thickness is limited.

On the other hand, two types of coagulation liquids or coagulation liquids having different concentrations are prepared in advance, and a coagulation liquid having a high film-forming ability or a coagulation liquid having a high concentration is applied only to a portion where the film thickness is increased, or There is also known a method in which a different coagulation liquid is immersed twice only in a portion where the film thickness is increased to increase the amount of coagulation liquid attached. However, in these methods, the number of steps for forming a film increases, and there is a problem in terms of production efficiency and production cost.

Accordingly, an object of the present invention is to provide a glove-forming hand mold capable of appropriately adjusting the thickness of a film in accordance with a part of a glove, and realizing such adjustment by a simple method. And a method of manufacturing a glove using a mold.

[0006]

Means for Solving the Problems and Effects of the Invention The present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, have found that using a glove handprint provided with regions of different materials on the surface. When a rubber or resin film is formed by a heat-sensitive method, it has been found that a difference occurs in the thickness of the formed film due to a difference in specific heat capacity between the materials of the hand mold surface, and this phenomenon is utilized. By doing so, they found a new fact that gloves provided with coatings having partially different thicknesses can be manufactured by one dipping, and have completed the handprint of the present invention.

That is, the hand mold according to the present invention is used for manufacturing gloves by a thermal method using a rubber latex or a resin emulsion, and a plurality of regions having different specific heat capacities are provided on the surface of the hand mold. It is characterized by the following. 2. Description of the Related Art Conventionally, in the production of gloves by a heat-sensitive method, a mold made of pottery, glass or aluminum and having a substantially uniform overall material has been used. On the other hand, the hand mold according to the present invention is characterized in that the surface material is partially different, and further, the specific heat capacity of the surface is different due to the difference in the material.

When a rubber or resin film is formed by a heat-sensing method using such a hand mold, for example, two types of coagulating liquids or coagulating liquids having different concentrations are prepared in advance, and the film is formed only on the portion where the film thickness is to be increased. A coagulating liquid with high forming ability or high concentration is applied (coagulating liquid method), or a coagulating liquid is immersed twice only in a portion where the film thickness is to be increased to increase the amount of coagulating liquid attached. (Coagulation solution method, viscosity pick-up method, conventional heat-sensitive method) such as rubber or resin gloves with partially different film thickness by performing the immersion operation only once without the need for laborious and costly methods. Can be manufactured.

Therefore, according to the hand mold of the present invention, when a so-called non-support type glove without a fiber glove body is manufactured by a heat-sensitive method, the thickness of the glove is partially different. Can be achieved by a very simple method. In the hand mold of the present invention, the specific heat capacity of the surface corresponding to the thick portion of the rubber or resin film formed on the surface of the hand mold is higher than other regions. Should be set to. This makes it possible to easily provide a glove in which any part is reinforced.

The difference between the specific heat capacities in the regions having different specific heat capacities is preferably at least 150 J / (kg · K). The method for manufacturing a glove according to the present invention is characterized in that the hand mold according to the present invention is immersed in rubber latex or resin emulsion to form a rubber or resin film on the surface of the hand mold. According to the glove manufacturing method of the present invention, as described above, for example, two types of coagulation liquids or coagulation liquids having different concentrations are prepared in advance, and a coagulation liquid having a high film-forming ability only in a portion where the film thickness is increased. A method that involves labor and cost, such as attaching a coagulating liquid with high concentration or a coagulating liquid twice only to the part where the film thickness is to be increased, and increasing the amount of coagulating liquid adhering. By performing only one dipping operation, rubber or resin gloves having partially different film thicknesses can be manufactured by a heat-sensitive method.

[0011]

Next, a hand mold according to the present invention and a method for manufacturing gloves using the same will be described in detail. The handprint according to the present invention is used for producing a so-called non-support type glove by a heat-sensitive method using a rubber latex or a resin emulsion. The handprints 10 and 11 shown in FIGS. This is one embodiment.

The hand mold according to the present invention is characterized in that the material of the surface is made different in an arbitrary region, more specifically, the specific heat capacity of the hand mold is made different in an arbitrary region. The thickness of the rubber or resin film formed in an arbitrary region can be made different from the film thickness of the film formed in another region. A region (hereinafter, referred to as an “arbitrary region”) in which the material of the surface (more specifically, the specific heat capacity) is different is set in which part of the handprint, or the specific heat capacity between the arbitrary region and another region is set. The degree of the difference is appropriately set according to the film formed on the surface of the hand mold, that is, the use of the non-support type glove.

When the material in the arbitrary region has a higher specific heat capacity than the material in the other region, the thickness of the rubber or resin film formed in the arbitrary region can be increased. Can be reinforced. Examples of the part of the hand mold surface include, but are not limited to, a sleeve part 20, a wrist part 21, an upper part 22, a palm part 23, a finger part 24, and a part 25 (see FIG. 1). ). Further, the finger portion 24 is, for example, a back portion 26 side and a palm side 27 side.
The material of the surface may be made different, or the material of the surface may be made different only at the tip (fingertip) of the finger portion.

In the hand mold 10 shown in FIG. 1, the material of the region (arbitrary region 30) consisting of the sleeve portion 20 and the wrist portion 21 and the other regions (the upper part 22, the palm part 23, the finger part 24, Further, the material of the section 25 and the like is different. Here, when the material of the arbitrary region 30 has a higher specific heat capacity than the material of the other regions, the thickness of the film in the sleeve portion 20 and the wrist portion 21 is large, and the film is reinforced in the portion. Rubber or resin gloves can be manufactured. By reinforcing only the sleeve 20 and the wrist 21, the upper 2
2. It is possible to improve the wearing / removing property of the glove while maintaining the flexibility of the film on the palm 23, the finger 24, the section 25, and the like.

In the hand mold 11 shown in FIG. 2, a streak-like arbitrary area 31 is provided in a part of the wrist 21 and the upper part 22 thereof. Here, when the material of the arbitrary region 31 has a higher specific heat capacity than the material of the other regions, the strength of only the streak-like portions in the wrist portion 21 and part of the upper portion 22 increases, and Part dripping (slipping)
Can be prevented. Examples of the material of the hand mold include various conventionally known materials such as pottery, glass, and aluminum. These materials are used in an appropriate combination depending on the specific heat capacity required for the surface of the hand mold.

In general, to reduce the specific heat capacity, it is preferable to use pottery, glass or the like among the above-mentioned materials, and to increase the specific heat capacity, it is preferable to use a metal such as aluminum among the above-mentioned materials. Therefore, as a combination of materials for forming the surface of the hand mold, for example, aluminum is used for a portion where the rubber or resin film formed on the hand mold surface is desired to be thickened, and pottery or glass is used for a portion where the rubber or resin film is desired to be thinned. Is used.

The difference in specific heat capacity is not particularly limited, but in order to produce a significant difference in the thickness of the formed rubber or resin film, the difference is at least 150 J / (kg · K). Is more preferable, and more preferably 200 J / (kg · K) or more. In general, aluminum and pottery or aluminum and glass have a specific heat capacity of 1%.
It has a difference of 50 J / (kg · K) or more. The handprint of the present invention is not limited to those shown in FIGS. 1 and 2, and can be appropriately designed within a range that does not change the gist of the present invention. Further, the present invention is not limited to the bent finger type, but may be a straight finger type according to the use of the glove to be manufactured.

In the method for manufacturing gloves according to the present invention, the hand mold according to the present invention is preheated and immersed in a rubber latex or a resin emulsion to coat a rubber or resin film on the surface of the hand mold. It is characterized by forming. That is, the glove manufacturing method of the present invention uses the hand mold according to the present invention to form a rubber or resin glove by a conventionally known heat-sensitive method. The conditions for forming the rubber or resin film by the heat-sensitive method, particularly the temperature conditions for preheating the hand mold, are not particularly limited, and may be set according to a conventional method.

As the rubber latex and the resin emulsion used for the production of gloves, various ones conventionally used in the heat-sensitive method can be used. Examples of the rubber latex include natural rubber (NR) latex,
Acrylonitrile-butadiene rubber (NBR) latex, styrene-butadiene rubber (SBR) latex,
Such as ethyl methacrylate graft (MG) latex,
Various conventionally known rubber latexes can be used. A vulcanizing agent, a vulcanization accelerator, a vulcanization acceleration aid, and the like can be appropriately compounded in these rubber latexes.

On the other hand, examples of the resin emulsion include a vinyl chloride resin emulsion and a urethane resin emulsion. To these resin emulsions, a crosslinking agent can be added for the purpose of enhancing the crosslinkability of the resin and improving the strength of the glove.

[0021]

The present invention will be described below with reference to examples and comparative examples. Example 1 (Preparation of heat-sensitive latex) Natural rubber latex [NR
Latex, solid content concentration (TSC) 60%] for 5 hours, and further adjust the pH to 10.0.
O) 1 part by weight, 1 part by weight of a vulcanization accelerator [zinc dibutylcarbamate (Bz)] and 1 part by weight of sulfur
Pre-vulcanization was performed by maintaining the state heated to 0 ° C. for 5 hours.

After pre-vulcanization, the pH was adjusted to 9.2 by adding formalin to the latex, and 100 parts by weight of a rubber solid content of the latex was treated with polyvinyl methyl ether (manufactured by Bayer AG) as a heat-sensitive coagulant. 2 parts by weight of trade name "Lutnard") were added. Further, distilled water was added so that the TSC became 30%, and this was used as a latex for heat-sensitive coagulation. (Manufacture of rubber gloves)
2. The palm 23 and the finger 24 have a specific heat capacity of 0.16c.
al / (g · ° C.) [about 670 J / (kg · K)], and the sleeve 20 and the wrist 21 have a specific heat capacity of 0.21 cal / (g · ° C.) [about 879 J / (Kg
· K)] (see FIG. 1). The difference between the specific heat capacities of the two is 0.05 cal /
(G.degree. C.) [about 209 J / (kg.K)].

The hand mold 10 is placed in an oven at 100 ° C. for 15 minutes.
After preheating for a minute, the rubber film was formed on the surface of the hand mold by immersing this in the above-mentioned latex for thermal coagulation (that is, according to the thermal method). Further, the formed rubber film was vulcanized and dried in an oven at 100 ° C. for 40 minutes and demolded to obtain a rubber glove. The obtained rubber glove had a thickness of 0.32 mm at the finger portion 24 and an upper portion 22.
Was 0.30 mm, and the thickness of the sleeve 20 and the wrist 21 (the part corresponding to the region where the surface of the hand mold 10 was made of aluminum having a high specific heat capacity) was 0.50 mm.

As described above, one hand mold is placed in rubber latex.
Gloves having partially different thicknesses could be manufactured only through a simple process of immersion multiple times. In addition, such gloves have only the thickness of the sleeve part larger than the other parts, the finger part,
The strength of the wrist and sleeves was sufficiently reinforced while maintaining flexibility in the upper and palm parts. Comparative Example 1 The same latex for heat-sensitive coagulation as used in Example 1
The whole is ceramic (specific heat capacity 0.16 cal / (g · ° C))
(Preheated in a 100 ° C. oven for 15 minutes) was immersed to form a rubber film on the surface of the hand model. Further, the formed rubber film was vulcanized and dried in an oven at 100 ° C. for 40 minutes and demolded to obtain a rubber glove.

The obtained rubber glove has a finger thickness of 0.3
4 mm, and the thickness of the sleeve was 0.27 mm. During molding by the heat-sensitive method, the hand mold is immersed in rubber latex with its fingertip side down, and since the fingertip side is finally pulled up from the rubber latex, the thickness at the fingertip is larger than that of the sleeve. It has grown. However, since the material of the hand mold was uniform, a rubber glove having a substantially uniform film thickness as a whole was obtained, except that the film thickness was slightly larger on the fingertip side where the immersion time in the latex was longer.

Comparative Example 2 An NR latex [solid content (TSC) 60%] was stirred for 5 hours, and the pH was adjusted to 10.0. Z
nO) 1 part by weight, a vulcanization accelerator [zinc dibutylcarbamate (Bz)] 1 part by weight and sulfur 1 part by weight,
By keeping the state heated to 50 ° C. for 5 hours,
Pre-vulcanization was performed.

The precured NR latex was immersed in a hand mold which had been immersed in a 20% aqueous calcium nitrate solution and dried in advance. Here, the hand mold used was entirely composed of a porcelain [specific heat capacity 0.16 cal / (g · ° C.)]. Next, while rotating the hand mold on which the rubber film is formed, only on the wrist and the sleeve of the hand mold surface,
The precured latex was applied by spraying. The obtained rubber glove had a finger thickness of 0.30 mm and a sleeve thickness of 0.35 mm. That is, although the thickness of the sleeve portion can be increased by spraying, there is a problem that it takes time and effort to manufacture gloves.

Comparative Example 3 The same hand mold as that used in Comparative Example 2 was immersed in a 20% aqueous solution of calcium nitrate and dried, and then its sleeve was removed.
It was immersed again in an aqueous solution of calcium nitrate and dried. Gloves were then made by immersing the hand mold in the same precured NR latex used in Comparative Example 2.

The obtained rubber glove had a finger thickness of 0.2.
Although the thickness of the sleeve was 5 mm and the thickness of the sleeve was 0.30 mm, and the thickness of the sleeve could be increased by immersing the coagulation solution twice, there was a problem that the production of gloves was troublesome and time-consuming.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a hand-shaped hand according to the present invention, wherein (a) is a front view, (b) is a right side view, and (c) is a rear view.

FIGS. 2A and 2B are diagrams showing another embodiment of the hand-shaped hand according to the present invention, wherein FIG. 2A is a front view, FIG. 2B is a right side view, and FIG.

[Explanation of symbols]

 10,11 Hand mold 30,31 Arbitrary area (area with high specific heat capacity)

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29K 101: 00 B29K 101: 00 B29L 31:48 B29L 31:48 F term (Reference) 3B033 AA27 AC01 AC03 4F202 AA45 AC05 AH70 AJ11 CA05 CB01 CD01 CK11 CK81 4F205 AA45 AC05 AH70 AJ11 GA08 GB01 GC01 GN07 GN28

Claims (4)

[Claims] 1. A hand mold used for producing gloves by a thermal method using a rubber latex or a resin emulsion,
A handprint, wherein a plurality of regions having different specific heat capacities are provided on the surface of the handprint. 2. The specific heat capacity of a region of the surface of the hand mold corresponding to a thick portion of a rubber or resin film formed on the surface of the hand mold is higher than other regions. Hand type. 3. The difference in specific heat capacity is 150 J / (kg · K).
The hand mold according to claim 1 or 2, which is as described above. 4. A method for producing gloves, wherein the hand mold according to claim 1 is immersed in rubber latex or resin emulsion to form a rubber or resin film on the surface of the hand mold. Method.