JPH064014U - Rubber gloves - Google Patents

Abstract

(57) [Summary] [Purpose] To impart non-adhesiveness and lubricity to the inner surface of rubber gloves. [Structure] On the inner surface of a rubber glove body A, a two-layer dry film B comprising a film 1 made of a modified urethane emulsion and a surface-treated film 2 made of a synthetic resin liquid containing a fluorine-containing surfactant is provided. [Effect] The non-adhesiveness / sliding property is improved, the film is not peeled off, they are maintained, and the physical properties are not deteriorated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rubber glove made of synthetic rubber including natural rubber and diene rubber, and more particularly to a rubber glove provided with non-adhesiveness and lubricity.

[0002]

[Prior art]

 Conventionally, rubber gloves made of synthetic rubber including natural rubber and diene rubber are sticky, and therefore, non-adhesive treatment is performed in a separate process after molding, peeling, and post-treatment. Usually, at the time of peeling, first attach powder or apply silicone oil emulsion to prevent adhesion, and further contact (1) silicone oil or (2) chlorine to chlorinate the surface to make it non-adhesive (3 ) Powder of starches, talc, silica, etc. was applied.

[0003]

[Problems to be solved by the device]

 However, in the case of (1), since the silicone oil itself is non-reactive with the surface of the natural rubber, the amount of adhesion decreases with repeated use and eventually it is removed, and at that point tackiness occurs. However, the inner surface of the product sticks to the product, and the wearing feeling deteriorates. In the case of (2), since chlorine gas is generated, the working environment is deteriorated, and at the same time, discoloration or the surface of the rubber is hardened and a minute rack is generated, which may cause deterioration of physical properties. In the case of (3), as in the case of (1), it was removed at the time of use and showed stickiness, and powder for the electronics industry could not be used.

By the way, in the case of gloves made of vinyl chloride, the inner surface is treated with a general acrylic or urethane emulsion to impart non-adhesiveness and lubricity. For example, there are JP-A-60-119204, JP-A-63-99303, JP-A-63-235508, JP-A-1-221501 and JP-A-2-229205. In the case of gloves made of vinyl chloride, since vinyl chloride, which is the main raw material of the gloves, has a high polarity, it has a good compatibility with the above-mentioned emulsion and therefore exhibits a strong adhesive effect. However, these emulsions do not apply to rubber gloves. The reason is that the raw material rubbers for rubber gloves are generally less polar than vinyl chloride, and the natural rubber is nearly non-polar, so that the method disclosed in the above publication cannot adhere to the surface of rubber gloves. Moreover, even if it adheres, it easily falls off and has a serious drawback that it has not been technically solved until now.

[0005]

[Means for solving problems]

 The present invention has been made in view of such circumstances, and its means is a synthetic resin surface-treated film in which a film made of modified urethane marjoon and a fluorosurfactant are added to the surface of a rubber bag body. That is, a two-layer dry film is provided.

[0006]

【Example】

 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an embodiment of the present invention will be described with reference to the drawings. The rubber glove body A is made of rubber made of synthetic rubber including natural rubber and diene rubber, which are well known in this technical field, and is well known. It was obtained by the method, and the surface was coated with a modified urethane emulsion as a surface treatment solution, then immersed in an aqueous solution of a chelating agent, and then a non-adhesive and lubricious surface treatment solution containing a fluorosurfactant was added. A two-layer dry coating B including the coating 1 and the surface-treated coating 2 is provided on the inner surface by a two-step coating of applying a synthetic resin liquid that imparts

The film 1 is a film made of a modified urethane emulsion, and it is necessary to adjust the solution concentration of this surface treatment solution so as to match the rubber gloves, and the range of 0.1-10% is appropriate. 0.5 to 7% is preferable because it is more effective, and the emulsion is applied to the rubber glove body A by the dipping method and then dried once. An example of the formulation of this surface treatment agent is 300 to 40,000 parts by weight of water and 1 to 10 parts by weight of water-soluble epoxy resin, relative to 100 parts by weight of the modified urethane emulsion (40%).

The composition of the modified urethane emulsion is composed of a copolymer of polyols, diisocyanates and chain extenders (polyhydric alcohols, polyhydric amines), and factors selected as monomers are Considering hydrophilicity, high reactivity, adhesion, low coefficient of friction, etc., good-performance polyols include poly-ε-caprolactone, polyhexamethylene carbonate, polybutadiene polyol, silicone polyol, and diisocyanates. Examples of the class include tolylene diisocyanate, 4-4'-diphenylmethane diisocyanate, hexamethylene diisocyanate, 4-4'-methylenebis (cyclohexyl isocyanate), and isophorone diisocyanate. Further, the chain extender is ethylene glycol, 1,4 butanediol or the like in polyhydric alcohols, and isophorone diamine, 4-4'-diphenylmethanediamine, hydrazine or the like as polyhydric amines. Polyols having particularly high performance include polyhexamethylene carbonate, polybutadiene polyol, and silicone polyol. It is also possible to use these as the basic polyol of the copolymer in combination with other polyols, that is, to use the modified polyol alone or to use a blend of these other modified urethanes.

After forming the film 1 composed of the modified urethane emulsion, it is then immersed in an aqueous solution of a chelating agent to remove calcium ions and the like present in a trace amount on the surface, and then a surface treatment to which a fluorine-based surfactant is added. Apply the liquid evenly and apply it. The suitable concentration of the aqueous chelating agent solution is 0.001 to 1%, and 0.01 to 0.1% is a concentration that is easy to use.

The surface treatment film 2 is a film made of a synthetic resin surface treatment liquid to which a fluorine-based surfactant is added, and the surface of the film 1 is coated with the synthetic resin surface treatment liquid by a two-step coating. A two-layer dry film B is formed. This surface treatment liquid may be any synthetic resin type treatment liquid capable of imparting non-adhesiveness and lubricity. For example, a general polyester polyurethane or acrylic type is used, and a fluorine-based surfactant is added to the surface treatment liquid. At the same time as the addition, the surface treatment liquid is applied to the chelating agent aqueous solution after the surface is washed as described above.

In order to improve the solvent resistance, heat resistance, and water resistance of such a surface treatment solution, water-soluble melamine or epoxy resin is used as a crosslinking agent, and organic amines or ammonium salts are used as catalysts. It is also good to use each as. To improve the lubricity of the surface treatment agent, add epoxy-modified silicone etc. to form the surface treatment agent, and add a good lubricant such as silicone powder, urethane powder, polyethylene wax, etc. Is also possible.

As the surface treatment liquid, 300 to 4000 parts by weight of water, 1 to 10 parts by weight of a water-soluble epoxy resin, and a fluorine-based interface are added to 100 parts by weight of a polyester polyurethane emulsion (40%) or an acrylic emulsion (40%). Add 0.001 to 4 parts by weight of activator. This coating amount should be taken into consideration when it becomes the surface-treated film 2 after drying, but it should be formed as thin as possible so as not to change the texture of the rubber gloves.

Next, the manufacturing process of an example of a specific embodiment of the present invention and a comparative example (conventional example) will be described in detail.

Natural rubber latex (DRY) 100 parts by weight S 1 parts by weight Zn O 1 parts by weight Dithiocarbamate vulcanization accelerator 0.8 parts by weight Anti-aging agent 1 part by weight Stabilizer suitable amount

It is obtained by immersing a glove manufacturing mold in the natural rubber latex having the above composition, the process is as shown in Table 1, and the physical properties and performance of the manufactured rubber gloves are shown in Table 2. In the example of the surface treatment agent in the Examples, the surface treatment liquid is 100 parts by weight of modified urethane emulsion (40% urethane solid content) (polybutadiene urethane emulsion), 300 parts by weight of water and water-soluble epoxy resin ( Epoxy cross-linking agent) 4 parts by weight are added. Synthetic resin surface treatment liquid is 900 parts by weight of water, water-soluble epoxy resin (100 parts by weight of urethane urethane emulsion (urethane solid content 40%)). Epoxy cross-linking agent) 4 parts by weight and fluorosurfactant (perfluoroalkyl acid salt) 1 part by weight are added. The cleaning is performed with a chelating agent aqueous solution during the process, but a 0.5% aqueous solution of EDTA 2Na is prepared. Then, the surface treatment liquid is applied, dried and then immersed in the aqueous solution to perform a surface cleaning treatment.

[0016]

[Table 1]

[0017]

[Table 2]

[0018]

[Effects of the Invention] The present invention applies a modified urethane emulsion to the inner surface of a rubber glove body, removes surface impurities by washing with a chelating agent, and then applies a synthetic resin surface treatment agent with excellent performance. By providing a two-layer dry film consisting of a modified urethane emulsion film and a surface-treated film made of a synthetic resin solution containing a fluorine-based surfactant, non-adhesiveness and physical properties (strength) are improved. In addition to being imparted with the properties, it is possible to obtain a product in which these are improved, and there is no peeling during use or elongation.

That is, by forming the dry coating film composed of the surface treatment agent into two layers, a strong adhesive coating film on the rubber surface, which is not possible with the conventional surface treatment agent, is formed, and the smoothness and the non-slip property are kept. Adhesiveness is developed. First, the surface treatment liquid to be applied is a modified urethane that is highly compatible with the rubber surface, and it is aimed to achieve strong adhesion to the rubber surface. The next surface treatment liquid to be applied is the synthetic resin surface treatment liquid. It exhibits strong adhesion to the treatment liquid and exhibits lubricity and non-adhesion. Moreover, by adding a fluorine-based surfactant to the synthetic resin surface treatment liquid, the lubricity and non-adhesiveness are good. Therefore, it can be permanently formed on the inner surface of the glove body, and since no powder or the like is used, it is not contaminated and is not removed during use.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a rubber glove according to the present invention, which is partially cut away.

FIG. 2 is a sectional view.

[Explanation of symbols]

A is a rubber glove body, B is a two-layer dry film, 1 is a film made of a modified urethane emulsion, 2 is a surface-treated film made of a synthetic resin liquid to which a fluorine-based surfactant is added.

Claims (1)

[Scope of utility model registration request] 1. A rubber glove in which two layers of dry coating are provided on the inner surface of the main body of the rubber glove, that is, a coating made of a modified urethane emulsion and a surface-treated coating made of a synthetic resin solution containing a fluorine-containing surfactant.