| 摘要 |
<p>1,187,716. Pressure sensitive adhesive films. SEKISUI KAGAKU KOGYO K.K. 12 July, 1968 [12 July, 1967; 16 Sept., 1967], No. 33457/ 68. Heading B2E. [Also in Division C3] A pressure-sensitive adhesive film comprises a flexible synthetic resin film having a vinyl or a diene monomer graft-polymerised onto one face, and coated onto the face a layer of a pressure sensitive adhesive containing a natural or synthetic rubber or a synthetic resin. The graft-polymerised vinyl monomer may be styrene, vinyl acetate, vinyl chloride, acrylates and methacrylates e.g. methyl methacrylate, methacrylic acid, acrylonitrile or acrylamide; and the graft-polymerised diene monomer may be butadiene, chloroprene or isoprene. The synthetic resin film may be of polyethylene, copolymers of ethylene and 5- 50% by wt. vinylacetate, copolymers of ethylene and vinyl chloride, polypropylene, polyethylene terephthalate or fluorine-containing polymers e.g., polytetrafluoro ethylene and polymers of chlorotrifluoroethylene and of vinyl fluoride. The rubber or synthetic resin of the adhesive layer and the graft-polymerised polymer of the vinyl or diene monomer may have similar solubility parameters. The rubber or synthetic resin component of the adhesive may be a graft polymer of a natural or synthetic rubber or a synthetic resin with a vinyl or diene monomer - which may be the same monomer as is graft-polymerised to the flexible film face. The adhesive may contain a rubber of low polarity and a layer of primer may be between the film face and the adhesive layer. The primer may comprise a mixture of natural or synthetic rubber with another polymer having a similar solubility parameter to the graft polymerised polymer of the vinyl or diene monomer; or a graft polymer of the vinyl or diene monomer grafted to natural or a synthetic rubber which graft polymer may have a solubility parameter similar to that of the graft polymerised polymer of the vinyl or diene monomer grafted to the flexible film. One face of the flexible film is contacted with the vinyl or diene monomer, caused to graft-polymerise to the face of the film e.g. by irradiation with ionising radiation which may have an intensity of 0.1 to 10 megarads, and coated with the adhesive or with primer and then with adhesive. One or more vinyl or diene monomer may be applied as a thin layer to the interior or exterior of a tubular film, irradiated, and the tube then cut into a flap tape. Alternatively, one face of the film is coated with a mixture of the vinyl or diene monomer and a natural or synthetic rubber e.g., a solution of the rubber in the monomer, irradiated or heated with a catalyst so as to cause part of the monomer to graft polymerise to the surface of the film and part of the rubber, and then coated with a layer of adhesive. Examples of adhesives are given. The primer and adhesive coatings may be applied by knife or roll coating methods.</p> |
| 申请人 |
SEKISUI KAGAKU KOGYO K.K., OSAKA, JP |
发明人 |
NAKATA, SHINSAKU, TOYONAKA, JP;HORI, HITOSHI, KYOTO, JP;TAGAMI, KOHEI, TOYONAKA, JP;SUZUKI, MASARU, OSAKA, JP |
