Rubber layered structure and manufacturing process therefor
AssigneeToyoda Gosei Co., Ltd.
InventorsTadanobu Iwasa, Takemasa Yasukawa
Life of this patent
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Abstract
A rubber layered structure used for a weather strip or a glass run, which includes an EPDM rubber base and an ornamental surface layer or a functional surface layer for enhancing slidability of a door glass. An ornamental or functional surface layer is stuck to an EPDM rubber base with a laminated film. The laminated film includes a first layer of an olefin resin with polar functional groups and a second layer of a polar thermoplastic resin. The first layer, which includes a non-polar olefin resin and polar functional groups, adheres to both the EPDM rubber base and the second layer of a polar resin such as polyester. The second layer securely adheres to the surface layer.
Claims11
A rubber layered structure having an EPDM rubber base and a laminated film layer, said laminated film layer comprising:
- a first film of a non-polar olefin resin modified by the introduction of maleic anhydride, said non-polar olefin resin being directly bonded to said EPDM rubber base by melting and re-solidifying said non-polar olefin resin thereon;
- and
- a polar thermoplastic resin layer directly attached to said non-polar olefin resin.
A rubber layered structure having an EPDM rubber base, a laminated film layer, and an ornamental surface layer;
- said laminated film layer comprising:
- a first non-polar maleic anhydride modified olefin resin layer, said first non-polar olefin resin layer being directly attached to said EPDM rubber base;
- and
- a polar thermoplastic resin layer directly attached to each of said non-polar olefin resin and to said ornamental surface layer;
- and
- wherein said EPDM rubber base and said ornamental surface layer are attached to said non-polar olefin resin and said polar thermoplastic resin layer, respectively, of said laminated film layer, by melting and re-solidifying said laminated film layer between said EPDM rubber base and said ornamental surface layer.
Dependencies are inferred from the claim text.