Patent EP0495646A1 successfully refreshed from Google Patents.
EP0495646A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
PVC sheets for membrane press forming
Assignee: Riken Technos Corp
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Filing: 1992-01-15
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Granted: —
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Expires: 2012-01-15
Abstract
Abstract A method for preparing polyvinyl chloride sheets for membrane press forming which comprises contact bonding of a preheated first polyvinyl chloride sheet on the heating drum, contact bonding of at least one other layer of preheated polyvinyl chloride sheet thereon, contact bonding of a transfer film thereon and embossing by emboss-roll thereon, wherein said transfer film has a laminated structure comprising a polyester film, a release coat layer, a resin coat layer and a hot melt coat layer successively from the surface layer.
Inventors
- 👤 Yasuo c/o Riken Vinyl Industry Co. Ltd Kasahara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 23:17
CPC Classifications
B; B32; B32B; B32B37/00; B29; B29C; B29C43/00; B29C43/32; B29C43/36; B29C43/3642; B29C59/00; B29C59/02; B29C59/04; B29C59/046; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/304; B32B27/306; B32B27/36; B32B27/40; B32B3/00; B32B3/26; B32B3/30; B32B37/02; B32B37/14; B32B37/26; B32B38/00; B32B38/04; B32B38/06; B32B2327/00; B32B2327/06; B32B2367/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1023
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
92 words
A method for preparing polyvinyl chloride sheets for membrane press forming which comprises contact bonding of a preheated first polyvinyl chloride sheet (7) on a heated drum. (10), contact bonding of at least one other layer of preheated polyvinyl chloride sheet (6) thereon, contact bonding of a transfer film (5) thereon and embossing by emboss-roll thereon, wherein said transfer film has a triple coated structure comprising a polyester film (1), a release coat layer (2), a resin coat layer (3) and a hot melt coat layer (4) successively from the surface layer.
Claim 2
Dependent Claim
39 words
The method as claimed in claim 1 wherein said release coat layer is an acrylic resin mixed with wax, said resin coat layer is an urethane resin, and said hot melt coat layer is a polyvinyl chloride/vinyl acetate resin.
Claim 3
Independent Claim
21 words
The method as claimed in claims 1 or 2 wherein said polyester film has a thickness of 6 to 100 µm.
References Cited (Backward Citations)
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