JPH0582432B2 - - 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, and rubber adhesives are used as pressure-sensitive adhesive compositions, so in order to obtain clear copies, the pressure-sensitive adhesive composition layer is 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 a transparent slightly adhesive composition comprising acrylic pressure-sensitive adhesive microspheres with a particle size of 10 to 100μ and a liquid compound selected from the group consisting of stearic acid, lanolin, liquid surfactant, and silicone oil. It is an adhesive tape or sheet for simple copying that is laminated on one side of a transparent film.

The microspheres used in the present invention are made of acrylic adhesive, and as the particle size becomes smaller, the removability decreases, and as the particle size becomes larger, the unevenness becomes larger.
The particle size is limited to 10-100μ, preferably 15-40μ. As the acrylic pressure-sensitive adhesive, any known pressure-sensitive adhesive mainly composed of acrylates such as butyl acrylate and 2-ethylhexyl acrylate can be used. Further, any known method may be used to produce the microspheres, such as a suspension polymerization method when polymerizing acrylate, a solution polymerized acrylic adhesive solution in water,
Examples include a method of adding it to alcohol or the like, stirring it, and dispersing it.

The liquid compound used in the present invention is stearic acid,
It is selected from the group consisting of lanolin, liquid surfactants, and silicone oil. Examples of liquid surfactants include fatty acid salts such as sodium laurate, sodium oleate, sodium stearate, and potassium laurate, and dodecylbenzene. Examples include anionic activators such as sodium sulfonate, sodium lauric sulfate, and triethanolamine monofatty acid ester salts, and nonionic activators such as polyoxyethylene alkyl phenol ether, polyoxyethylene fatty acid ester, and sorbitan fatty acid ester. If the amount of the liquid compound added is small, copying becomes difficult, and if it is too large, the adhesive composition becomes sticky and does not exhibit efficacy as an adhesive. Therefore, stearic acid should be added in an amount of 0.1 to 5 parts by weight per 100 parts by weight of the microspheres. , Norin and liquid surfactant are
It is preferable to add 0.1 to 20 parts by weight, and 0.1 to 3 parts by weight of silicone oil.

Although the transparent slightly adhesive composition of the present invention contains the above-mentioned microspheres and a liquid compound, conventionally known adhesives such as acrylic, rubber, and silicone adhesives may be used as binders; Agents are preferably used.

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. All you have to do is mix it up, apply it on one side of a transparent film and dry it.

〔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 large fiber gaps printed with the above newspaper ink, so newspaper articles can be printed using the adhesive tape or tape of the present invention. Particularly clear copies can be made without causing the paper tearing phenomenon.

〔Example〕

Next, embodiments of the present invention will be described.

Example: 322.5 g of water, 5.8 g of sodium alkylallyl polyether sulfonate (Triton Then, the temperature was raised while stirring, and 55 g of butyl acrylate, 42 g of 2-ethylhexyl acrylate, 3 g of acrylic acid, and 0.29 g of benzoyl peroxide were added in the range of 67 to 72°C for suspension polymerization. After the polymerization was completed, it was cooled and the salt The mixture was analyzed and dried to obtain a polymer. The average diameter of the microspheres obtained is 30μ
It was hot. The obtained polymer was dispersed in a mixed solvent of butanol and toluene (6/4) to obtain a microsphere dispersion with a solid content of 8%, and an acrylic adhesive (97 parts by weight of butyl acrylate and 3 parts by weight of acrylic acid) was added to the dispersion. (parts by weight of polymer) was added at a solid content ratio of 6/4, and a small amount of zinc acetate was added for crosslinking, and ester of sorbitan monostearate (NOF Corporation) was added to 100 parts by weight of the microspheres. A slightly sticky composition was obtained by adding and mixing 10 parts by weight of Nonion SP-60 (manufactured by Nippon Steel & Co., Ltd.) and 1 part by weight of silicone oil. The obtained composition was applied to a transparent diacetate film having a thickness of 45 μm and a matte finish on the back side and dried to obtain an adhesive tape of the present invention having a slightly adhesive composition layer laminated with a thickness of 20 μm. . The adhesive strength of the resulting adhesive tape was 100 g/25 mm width. The microspheres were crushed and became flattened. When the obtained adhesive tape was attached to newspaper and peeled off, it was easily peeled off without tearing the paper, and a clear image was transferred to the adhesive tape. Also, when copying the same spot on a newspaper repeatedly, clear images were obtained up to 12 times.

Claims (1)

[Claims] 1 Acrylic adhesive microspheres with a particle size of 10 to 100μ, stearic acid, lanolin, liquid surfactant,
An adhesive tape or sheet for simple copying, comprising a transparent slightly adhesive composition containing a liquid compound selected from the group consisting of silicone oil and laminated on one side of a transparent film.