JPH0760908A - Fitting rubber product and production thereof - Google Patents

Abstract

PURPOSE:To prevent the falling-off of projections being a lubricant and to achieve easy fitting due to the reduction of a contact area by fixing a large number of semispherical projections composed of a water-soluble polymer being a lubricant to the surface of a part on the fitting side of a rubber molded product being a base material through an adhesive. CONSTITUTION:A fitting rubber product such as an operation rubber glove is constituted by fixing a large number of semispherical projections 2 composed of a water-soluble polymer being a lubricant to the surface of a part on the fitting side to the skin of a finger of a rubber molded product 1 being a base material through an adhesive 3. As the adhesive 3, a melamine resin adhesive is employed. At the time of production, at first, the rubber molded product 1 having a desired shape is immersed in a water-soluble polymer fine particle suspension containing the adhesive 3 and, next, this molded product is heated at the softening point of the water-soluble fine particles. By this constitution, the projections 2 being the lubricant are strongly bonded to be prevented from falling off during use and the contact area to the skin being a fitting object is reduced to facilitate fitting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber article for wearing, such as surgical rubber gloves, which can be easily worn, and a method for producing the same.

[0002]

2. Description of the Related Art Rubber products for wearing, typified by rubber gloves for surgery, are used in order to prevent falling and wearing during use.
Generally, it is formed so as to be in close contact with the wearing target. On the other hand, on the other hand, there is known a product in which a lubricant such as silicon dioxide or cornstarch treated with epichlorohydrin is applied to the inner surface in order to ensure a certain degree of ease of mounting. However, those coated with such a lubricant have a problem that the lubricant falls off during use. If this is a rubber glove for surgery, not only the surgical instrument is contaminated, but also the surgical site of the patient may be contaminated. In addition, in addition to the lubricant, it is also known that the inside of the rubber product is treated with halogen. However, this halogen treatment has a problem that the halogen may adversely affect the human body in addition to the possibility of discoloring the product.

As a solution to such a problem, there is known one in which a hydrogel polymer is applied to the surface of a rubber product to improve the slipperiness (US Pat. No. 3,813,695).
No.). However, although the polymer-coated surface of this product improves the sliding property to some extent, it still has a large contact area with the skin surface and is insufficient for improving the ease of wearing. There is also known a medical glove in which a granular lubricant is embedded in an elastomer serving as a base material so as to be partially exposed (see Japanese Patent Publication No. 60-6655). However, due to the difference in physical properties between the elastomer, which is the base material, and the lubricant, external force applied at the time of mounting and use causes distortion at the contact site between the two, which eventually causes the lubricant to fall off. is there. Further, in the case of this product, since it has a two-layer structure, the finished product becomes slightly thick.

[0004]

As described above, the rubber products for wearing such as the conventional rubber gloves for surgery have insufficient slipperiness and are difficult to wear, and the lubricant introduced to improve the wearability is removed. There is a problem of doing. Therefore, an object of the present invention is to solve the above problems, and to provide a mounting rubber product which is easy to mount and does not have a problem such as slipping off of a lubricant, and a method for manufacturing the same.

[0005]

A rubber article for mounting according to the present invention has a plurality of substantially hemispherical projections made of a water-soluble polymer on a part of the surface of a rubber molded article as a base material via an adhesive. It is characterized by being fixed. Furthermore, the method for producing a rubber article for wearing of the present invention comprises a step of immersing a rubber molded article having a desired shape in a water-soluble polymer fine particle suspension containing an adhesive,
And then heating at the softening point of the water-soluble polymer particles.

In the following, the wearing rubber product of the present invention will be described first. The wearing rubber product according to the present invention is to be attached to or inserted into an object to be worn, and the object is a human body. It does not matter if it is not limited to each part and that it is other than them. Further, in the present invention, the partial surface of the rubber molded product that is the base material means the surface of the final product obtained from the rubber molded product that comes into contact with the object to be mounted (skin in the case of a human body).

The rubber molded article which is the base material of the wearing rubber product is the same as that used for ordinary surgical rubber gloves, and natural rubber latex vulcanized with sulfur or the like should be used. You can In addition to these, various synthetic rubber molded products can be used. The shape and thickness of this rubber molded product can be appropriately set according to the purpose.

A plurality of substantially hemispherical projections made of a water-soluble polymer formed on a part of the surface of a rubber molded article are randomly dispersed with a spherical surface or a curved surface close to the spherical surface facing outward. Is. The water-soluble polymer used here is not particularly limited, since it does not deteriorate the rubber molded article as the base material in the heating step during production,
The softening point is preferably 150 ° C. or lower. As such a water-soluble polymer, polyvinyl alcohol, polyvinylpyrrolidone, polyethylene oxide, polyacrylamide, polyethyleneimine, polyacrylic acid, or modified products thereof can be used.

The adhesive for fixing the rubber molded product and the protrusions is not particularly limited, and vinyl acetate resin,
Thermoplastic resin adhesive such as acrylic resin, urea resin,
A thermosetting resin adhesive such as a phenol resin or a melamine resin can be used. Among these, a melamine-based resin adhesive (including a mixture with a urea resin) is preferable because it has high adhesive strength and a low curing temperature.

Next, the method of manufacturing the wearing rubber product of the present invention will be described step by step. Incidentally, the manufacturing process of the pre-stage and the post-stage of the dipping step and the heating step which will be described below are known rubber product manufacturing steps, for example, pre-vulcanization and post-vulcanization steps, and a silicone treatment step for improving slipperiness. Can be appropriately selected and applied.

First, a rubber molded article having a desired shape produced by a conventional method is dipped in a water-soluble polymer fine particle suspension containing an adhesive.

The water-soluble polymer fine particle suspension containing this adhesive is prepared by adding them and, if necessary, other components to an organic solvent which does not dissolve the water-soluble polymer fine particles but dissolves the adhesive. Can be obtained.

The water-soluble polymer particles can be obtained by a method in which a flocculant is added to the solution of the water-soluble polymer to precipitate the polymer, which is then dried and ground. The shape and size of the water-soluble polymer fine particles are not particularly limited. For example, in the case of spherical or substantially spherical particles, the particle diameter is 10 to 50 μm.
Is preferred. If the particles are too small, it becomes substantially the same as a smooth surface, and if it is too large, adjacent particles are fused by the treatment in the subsequent step, and again a substantially smooth surface is formed, which is not preferable.

Although the above-mentioned adhesives can be used as the adhesive, it is preferable to select them in consideration of the softening point of the water-soluble polymer and the adhesive, the curing temperature of the adhesive, and the like. In addition, a catalyst (curing agent) or the like may be added to the suspension depending on the type of adhesive selected.

The mixing ratio of the water-soluble polymer and the adhesive in the suspension is not particularly limited, but it is preferable to mix 15 to 25 parts by weight of the adhesive with 100 parts by weight of the water-soluble polymer fine particles. .

In the dipping operation, it is preferable that the suspension is sufficiently stirred in advance so that the content components are uniform, and the dipping operation can be repeated a plurality of times as necessary.

By such a treatment of the dipping step, the water-soluble polymer fine particles are adhered to a part of the surface of the rubber molded article through an adhesive in a state as shown in FIG. 1, that is, while maintaining the original shape. Attached.

Next, the rubber molded article having the water-soluble polymer particles adhered to its surface in the previous step is heated at the softening point of the used water-soluble polymer particles.

The heating temperature is the softening point of the water-soluble polymer particles used in the previous step, but it may be a temperature in the vicinity thereof. If this heating temperature is too lower than the softening point, the water-soluble polymer will not soften, so that substantially hemispherical projections will not be formed, and if it is too high, the water-soluble polymer will melt and flow, again forming substantially hemispherical projections. It is not preferable because it is not done.

By the treatment in such a heating step, the water-soluble polymer fine particles are thermally deformed and fixed on the surface of the rubber molded product as protrusions in the state as shown in FIG.

[0021]

In the wearing rubber product of the present invention, the substantially hemispherical water-soluble polymer fine particles are adhered to the rubber molded product as the base material with the spherical surface as the upper surface (contact surface with the skin during use). ing. Therefore, the adhesive area with the rubber molded product as the base material is larger than in the case of the original shape (see FIG. 1) (see FIG. 2). On the other hand, since the spherical surface is the upper surface, the contact area with the skin or the like becomes small.

[0022]

EXAMPLES The present invention will be described below with reference to examples. The present invention is not limited to the examples below.

Example 1 A ceramic rubber glove mold was dipped in a natural rubber latex and then solidified with an acid to adhere to the mold. Then, it is vulcanized and dried to give a glove-shaped rubber molded product (thickness 0.1
.About.0.15 mm) was obtained.

Next, a suspension of water-soluble polymer particles was prepared. First, an aluminum sulfate solution was added to the polyvinyl alcohol solution to precipitate polyvinyl alcohol. Next, the polyvinyl alcohol was taken out and dried. Then, 24-48 using a glass ball mill
The mixture was pulverized over time to obtain polyvinyl alcohol fine particles having a particle diameter of 10 to 50 μm. Next, the polyvinyl alcohol fine particles (5% by weight), methylated melamine resin (0.75% by weight) and p-toluenesulfonic acid (0.075% by weight) as a catalyst were added to methanol to obtain a suspension. Got

After that, the rubber molded product as it was in the mold was immersed in the well-stirred suspension. The state of adhesion of the polyvinyl alcohol fine particles to the rubber molded product after this treatment was as shown in FIG.

Next, it was heated in an oven at 130 ° C. for 30 minutes. Then, it was immersed in boiling water for 30 seconds for cleaning, transferred to warm water, and then removed from the mold. Next, remove water well and apply silicone oil to the surface.
The rubber gloves of the present invention were obtained by drying at 0 ° C for several minutes. On the inside of this rubber glove, protrusions as shown in FIG. 2 were formed. As a comparison, the wearability of the glove of the present invention and that in which the same amount of polyvinyl alcohol was applied to the inside of the glove were tested. As a result, it was apparent that the gloves of the present invention were easier to wear.

Example 2 A rubber glove was produced in the same manner as in Example 1 except that the following suspensions were used. Mixing ratio of suspension components (% by weight ) Polyvinylpyrrolidone 5.0 Methylated melamine resin 1.0 p-toluenesulfonic acid 0.1 Methanol 93.9 100.0

As a comparison, the wearability of the glove of the present invention and the glove coated with the same amount of polyvinylpyrrolidone was tested. As a result, it was apparent that the gloves of the present invention were easier to wear.

[0029]

EFFECTS OF THE INVENTION In the rubber article for wearing of the present invention, the projections made of the water-soluble polymer which acts as a lubricant are firmly adhered by the adhesive and do not fall off during use.
Moreover, since the contact area with the skin or the like to be mounted is small, the mounting is easy. The wearable rubber product of the present invention can be applied to non-human body purposes in addition to surgical rubber gloves, medical instruments such as ureters and catheters, sanitary items such as condoms, and the like.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a manufacturing method of the present invention.

FIG. 2 is a diagram for explaining the manufacturing method of the present invention. 1 Rubber molded product 2 Water-soluble polymer fine particles or projections made of water-soluble polymer 3 Adhesive

Claims (3)

[Claims] 1. A rubber article for mounting, characterized in that a plurality of substantially hemispherical projections made of a water-soluble polymer are fixed to a part of the surface of a rubber molded article as a base material with an adhesive. . 2. The mounting rubber product according to claim 1, wherein the adhesive is a melamine resin adhesive. 3. A step of immersing a rubber molded article having a desired shape in a suspension of water-soluble polymer particles containing an adhesive, and a step of heating at the softening point of the water-soluble polymer particles thereafter. The method for manufacturing a rubber product for wearing according to claim 1 or 2.