JPS5871976A - Peeling material for tacky material - Google Patents

Abstract

PURPOSE:The titled peeling material, prepared by impregnating a water absorbing material with water or an aqueous solution, capable of giving the very effective peeling even for tacky materials having a low cohesive force or a large coating thickness, and widely used as a transporting material for an adhesive mass. CONSTITUTION:A peeling material prepared by impregnating a water absorbing material, e.g., a filter paper, kraft paper, hydrophilic polymer, water absorbing fabric, non-woven fabric or sponge with water or an aqueous solution, preferably an aqueous solution of a material imcompatible with the tacky material or a material which will not gelatinize the adhesive mass. e.g. a 1% aqueous solution of polyethylene glycol or 1% aqueous solution of NaCl.

Description

[Detailed description of the invention] The present invention relates to release materials for adhesive substances.

Conventionally, the mainstream release materials for adhesive substances have been those made by melt laminating polyethylene on paper and applying silicone treatment to the sag, or those made by applying silicone treatment to plastics, guffs, metals, etc. to make them releasable. However, with the conventional method described above, it is impossible to impart releasability to all kinds of adhesive substances.If the coating thickness of the adhesive substance to be applied is small, it can be peeled off, but if this thickness is increased, peeling becomes difficult. It had a drawback that made it impossible.

In order to solve these drawbacks, the inventors of the present invention focused on the phenomenon that water is extremely difficult to adhere to water-insoluble adhesive substances, and the fact that the influence of water on adhesives is almost nil. The present invention has been achieved as a release material for adhesive substances in place of silicone. Pertains to release materials.

Since the present invention consists of the following two configurations,
Not only is it a substitute for traditional silicone release agents,
It has the characteristics of being extremely effective in peeling off viscous substances with low cohesive force and those coated with a large coating thickness, and also having an extremely wide range of uses as a transport material for adhesives, for which there was no suitable means in the past. have

In the present invention, water-absorbing materials include (1) papers such as paper, kraft paper, hydrophilic polymers, water-absorbing fabrics, non-woven fabrics, (2) sponges, sponges, etc., and combinations thereof; A thin one is good. Furthermore, a film made of the above-mentioned materials and which is leached by water over time (such as cellophane) may be laminated thereon.

In the present invention, various aqueous solutions may be those that are not compatible with the adhesive substance or do not cause the adhesive to gel, and depending on the properties of the adhesive substance, stabilizers, water retention agents, antifungal agents, gelling agents, etc. An inhibitor or the like may be appropriately added.

In the present invention, the adhesive substance refers to a water-insoluble adhesive substance, and includes various adhesive substances as long as they are not compatible with water or dilutable.

Next, the present invention will be explained in detail using examples.

Example Adhesive substance [A] (20 parts of polyisobutylene, 80 parts of terpene resin, 60 parts of polybutene) and its 8- Softener (polybutene) was increased to 150 parts to reduce cohesive force and make peeling difficult. The adhesive substance [B] was subjected to a conventional silicone treatment, and the releasability of the T-release paper and the release material of the present invention was comparatively evaluated.

First, apply oil-resistant pole paper to a thickness of 0.2 ax (:A) (1
0 adhesive substance was applied separately to each part, the release material was rolled with a rubber roller, and then pasted together, wrapped in a dense film, and after 24 hours, cut into 50 mm width and peeled at a peeling rate of about 0.8 #l/
180° peeling was measured with mix. The measurement conditions are 20
'C80%RIII, the amount of water absorbed by the release material is 2
00% weight.

The results are shown in the following table (1).

4- Table-m unit (g150+
o+) [Consideration] It is clear from Table 1 above that the adhesive substance (aluminum, which could be peeled off using conventional silicone-treated release paper, cannot be peeled off when it becomes sticky substance 01). On the other hand, the release material absorbing water or an aqueous solution of an inorganic or organic substance was able to release adhesive substance 011 as well. Similar results were obtained not only for this fIli adhesive substance but also for other types of adhesive substances.

As mentioned above, the present invention is not only a substitute for the conventional silicone release material, but also allows -C to be released using a viscous substance with low cohesive force and a large coating thickness, which was not possible with silicone-based materials. In addition, it has an extremely wide range of uses as a transportation material for adhesives for which there was no suitable means in the past, and is extremely useful industrially.
”,) Patent applicant Earth Pharmaceutical Co., Ltd.

Claims (1)

[Claims] A release material for adhesive substances, characterized in that a water-absorbing material is impregnated with water or an aqueous solution.