KR890002374B1 - Method of water-soluble doublesided adhesive-type - Google Patents

Abstract

The method comprises (i) coating water-soluble adhesive onto one side of a dualsided release paper and drying, (ii) sticking a water- soluble film selected from a gp. of gellatin, glue, cellulose and PVA on the coated paper, and (iii) coating adhesive dissolved in org. solvent onto the film, or joining over the film another release paper obtd. from coating water-soluble adhesive onto it and drying.

Description

Manufacturing method of water-soluble double-sided adhesive tape

The present invention relates to a water-soluble double-sided adhesive tape for use in a paper mill.

Conventional adhesive tapes are not 100% water soluble and have drawbacks such as a slow dissolution rate and limited use range depending on the temperature and pH range.

The present invention has been made to solve such a problem as described in detail as follows.

In order to film a water-soluble high molecular substance, in other words, gelatin, glue, cellulose (carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, starch, etc.) of natural or synthetic polyvinyl alcohol, polyvinylpyrrolidone, etc. After dissolving the water-soluble polymer material in water to make a suitable viscosity, it is applied to a release paper and dried with hot air of 90 to 150 ℃ and then separated from the water-soluble film and the release paper to make a film. As adhesive, it is applied to both sides of water-soluble film and shows strong adhesion to paper, and melts with water in film and is dissolved 100% in water. The main component is composed of adhesive component, plasticizer, solvent, etc. Lollidon, polyvinyl alcohol, carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, gelatin, glue, acrylic acid, methacrylic acid, etc. are used as plasticizers, as water-soluble polyols, that is, polyethylene glycol, glycerin, ethylene glycol, Copolypropylene glycol, block copolymers of polypropylene glycol and polyethylene glycol, alkyl esters of polyethylene glycol, and the like. And as a solvent, water, ethanol, methanol, butanol, acetone, etc. are used. In addition, since the film is melted and the shape is deformed by directly applying an adhesive using water as a solvent on the water-soluble film, in this case, it is necessary to apply an adhesive made by using water as a solvent on a separate release paper and to dry the adhesive on the water-soluble film. good.

Hereinafter, the present invention will be described based on Examples.

Example 1

After dissolving 40 parts of gelatin in 60 parts of water, the film was uniformly applied to a suitable thickness with a film applicater on a release paper, dried at 80 ° to 120 °, and the film and the release paper were separated to form a water-soluble film.

Example 2

27 parts of acrylic acid, 1 part of ammonium persulfate, 22 parts of glycerine, and 50 parts of purified water were put into a reactor, and the mixture was stirred at 60 ° to 80 ° for 4 hours by polymerization of a common monomer to prepare an adhesive.

Example 3

After applying the adhesive made in Example 2 to one side of the double-sided release paper and dried, the film prepared in Example 1 was applied to the adhesive coated and dried side and then on the film again on a separate release paper of Example 2 An adhesive was applied to dry the adhesive, and one of the two release papers was peeled off to form a water-soluble double-sided adhesive tape.

Example 4

After applying the adhesive prepared in Example 2 to one side of the double-sided release paper and dried, the film prepared in Example 1 was laminated on the coated and dried surface of the adhesive, and then polyvinyl pyrrolidone was added to the organic solvent again. The adhesive obtained by dissolving in was applied and dried to make a water-soluble double-sided adhesive tape.

The water-soluble double-sided adhesive tape manufactured as described above is 100% water-soluble so that foreign substances can not be found even under the microscopic examination of the pulp product because it does not adversely affect the quality of the product at all, and it has a fast dissolution rate. It has very good effects such as good yield and can be used regardless of temperature or pH range.

Claims (2)

1st process of apply | coating a water-soluble adhesive to one surface of double-sided release paper, and drying it, the 2nd process of laminating | stacking a water-soluble film on the adhesive application surface of a 1st process, and apply | coating and drying the adhesive which melt | dissolved with the organic solvent on the film of a 2nd process Or a third step of adhering the dried product by applying a water-soluble adhesive to a separate release paper on the film of the second step and bonding the dried product. The method for producing a water-soluble double-sided adhesive tape according to claim 1, wherein the water-soluble film is any one of gelatin, glue, cellulose, polyvinyl alcohol, and polyvinylpyrrolidone.