JPH0582431B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention allows articles printed in newspapers, magazines, etc., especially articles printed with newspaper ink (JIS K 5703), to be easily copied into scrapbooks, notebooks, etc. This invention relates to an adhesive tape or sheet for simple duplication that can be used to make copies.

[Prior art]

Conventionally, newspaper articles, etc., have been recorded and preserved by copying them with a copy machine, cutting them out with scissors, and pasting them on scrapbooks, notebooks, etc., but copying them is expensive, and cutting them out with scissors means that the back side is The disadvantage was that it was not possible to use the cutout, and the remaining parts after cutting it out could not be used.

In order to eliminate the above-mentioned drawbacks, Japanese Patent Application Laid-Open No. 58-3897 discloses a transparent pressure-sensitive adhesive composition containing a liquid plasticizer on a transparent film (adhesive strength to Bakelite plate of 30 to 30).
A method for transferring an ink layer from a printed matter is described, which is characterized in that a transfer body coated with 4,000 g/25 mm) is attached to an ink surface and then peeled off.

However, in the above method, adhesives such as acrylic adhesives, polyvinyl ether adhesives, rubber adhesives, etc. are used as pressure-sensitive adhesive compositions, so in order to obtain clear copies, the pressure-sensitive adhesive composition layer is required. It is necessary to make the paper thick and press it strongly, which has the disadvantage that paper tearing occurs when it is peeled off, making the copied newspapers etc. unusable.

[Purpose of the invention]

The purpose of the present invention is to copy articles printed in newspapers, magazines, etc., especially articles printed with newsprint ink (JIS K 5703), without causing paper tearing, and to easily copy articles into scrapbooks, notebooks, etc. An object of the present invention is to provide an adhesive tape or sheet for simple copying that can be used for copying.

[Structure of the invention]

The gist of the present invention is to combine 100 parts by weight of a mixture of a thermoplastic resin or rubber having substantially no tackiness and a liquid plasticizer in a weight ratio of 1:1 to 5, and 1 to 40 parts by weight of a tackifying resin. The adhesive tape or sheet for simple copying comprises a transparent slightly adhesive composition laminated on one side of a transparent film.

The thermoplastic resin or rubber used in the present invention has substantially no tackiness, and includes, for example, vinyl chloride resin, vinyl chloride as a main component,
Copolymers with polymerizable monomers copolymerizable with vinyl chloride such as ethylene and propylene; acrylate polymers and copolymers such as ethyl acrylate, methyl methacrylate, and butyl acrylate;
Examples include ethylene-propylene rubber, block copolymer rubber of styrene and isoprene, butadiene, isobutylene, etc.

Examples of liquid plasticizers used in the present invention include esters such as dioctyl phthalate, dibutyl phthalate, dioctyl adipate, and tricresyl phosphate; mineral oils such as light oil, spindle oil, and machine oil; linseed oil, sesame oil, and castor oil; Examples include vegetable oils such as camellia oil, and synthetic oils.

The tackifier resin used in the present invention is one commonly used in adhesives, such as rosin resin, hydrogenated rosin resin, terpene resin,
Examples include terpene-phenol resin, alkylphenol resin, coumaron indene resin, and alicyclic resin.

The slightly adhesive composition in the present invention is a transparent composition consisting of the above-mentioned thermoplastic resin or rubber, a liquid plasticizer, and a tackifier resin, and the mixing ratio of the thermoplastic resin or rubber and liquid plasticizer is determined by the amount of liquid plasticizer. If the amount of tackifying resin is too low, the mixture will be hard and difficult to adapt to the paper, and if it is too large, it will become sticky and have high adhesive strength.The weight ratio should be in the range of 1:1 to 5. If the adhesiveness is increased, the adhesiveness will be increased and the paper peeling phenomenon will occur.

The adhesive strength of the above composition is not particularly limited, but when measured in accordance with JIS Z 1522 using a Bakelite plate as an adherend, the adhesive strength is 10 to 10.
Preferably it is 200g/25mm width.

The transparent film used in the present invention may be substantially transparent, and examples thereof include polypropylene film, polyvinyl chloride film, cellulose acetate film, polyester film, polystyrene film, cellophane film, parchment paper, etc. Films are preferably used.

The method for producing the adhesive tape or sheet for simple copying of the present invention is not particularly limited, and any method may be adopted, but for example, the above-mentioned thermoplastic resin or rubber and liquid plasticizer are heated and mixed using a roll or the like. The method includes a method in which a sol-like mixture is prepared, a tackifying resin is added and mixed to obtain a composition, and the composition is coated on one side of a transparent film and cooled.

〔Effect of the invention〕

The structure of the adhesive tape or sheet for simple copying of the present invention is as described above, and it can be easily attached to a copying object such as a newspaper or magazine, peeled off, and attached to a scrapbook, notebook, etc. can be copied. Newspaper ink in particular uses carbon black and a so-called composite varnish, which is made by dissolving and dispersing a soluble resin in mineral oil such as rosin, ester rubber, gilsonite, or petroleum resin as a fixing agent in mineral oil such as diesel oil, spindle oil, or machine oil. The vehicle is one with a low viscosity of 3 to 15 poise, and the newspaper is a porous newspaper with many fiber gaps printed with the above newspaper ink, so newspaper articles can be printed using the adhesive tape or tape of the present invention. can be particularly clearly reproduced multiple times without causing the paper tearing phenomenon.

〔Example〕

Next, examples of the present invention will be described.

Example Vinyl chloride resin (degree of polymerization 1050) 20 parts by weight Polymethyl methacrylate 10 〃 Dioctyl phthalate 70 〃 Dibutyltin dimaleate 2 〃 Zinc stearate 2 〃 The blend having the above composition was fed to a roll at 160°C and melt mixed. Then, 5 parts by weight of rosin was added to obtain a sol-like mixture, and further mixed to obtain a slightly sticky composition. The adhesive tape of the present invention was obtained by coating it on a transparent diacetate film to a thickness of 30 μm and cooling it. The adhesive strength of the resulting adhesive tape was 60 g/25 mm width. In addition, when the obtained adhesive tape was pasted on newspaper and peeled off,
It could be easily peeled off without tearing the paper, and a clear image could be transferred to the adhesive tape. Also, when copying was repeated at the same spot on the newspaper, clear images were obtained up to 8 times.

Claims (1)

[Claims] 1 A transparent product consisting of 100 parts by weight of a mixture of a thermoplastic resin or rubber that does not have substantially tackiness and a liquid plasticizer in a weight ratio of 1:1 to 5, and 1 to 40 parts by weight of a tackifying resin. An adhesive tape or sheet for simple copying comprising a slightly adhesive composition laminated on one side of a transparent film.