EP0249583A1
Expired / Lapsed
EP
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Decorative plastics laminate and method for its manufacture
Assignee: Abet Laminati SpA
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Filing: 1987-06-01
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Granted: —
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Expires: 2007-06-01
Abstract
Abstract The decorative plastics laminate comprises a plurality of superposed translucent sheets constituted by 60 to 100% of alpha-cellulose and 0 to 40% of rayon fibres, impregnated with a thermosetting amino resin and bonded together by pressure and heat. Together with the characteristics of resistance to abrasion, water, impacts and chemical reagents, the laminate has a particular decorative effect obtained by virtue of the transparency of the cellulose sheets used.
Inventors
- 👤 Guido Jannon
- 👤 Raffaele Bogana
- 👤 Marco Grosso
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 19:35
CPC Classifications
B; B32; B32B; B32B19/00; B32B19/02; B32B29/00; B32B29/06; B32B29/002; B32B29/005; B32B3/00; B32B3/10; B32B3/18; B32B3/20; D; D21; D21H; D21H27/00; D21H27/18; D21H27/22; D21H27/24; B32B2260/00; B32B2260/02; B32B2260/028; B32B2260/04; B32B2260/046; B32B2307/00; B32B2307/40; B32B2307/414; B32B2451/00; D21H11/00; D21H11/02; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/49; D21H17/51; D21H27/26; D21H27/28
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
60 words
Decorative plastics laminate including a plurality of superposed cellulose-based sheets impregnated with thermosetting resin and bonded together by heat and pressure, characterised in that the core thereof consists essentially of a plurality of substantially translucent sheets constituted by 60 to 100% by weight of alpha-cellulose and from 0 to 40% by weight of rayon fibres impregnated with thermosetting amino rasin.
Claim 2
Dependent Claim
60 words
Decorative plastics laminate including a plurality of superposed cellulose-based sheets impregnated with thermosetting resin and bonded together by heat and pressure, characterised in that the core thereof consists essentially of a plurality of substantially translucent sheets constituted by 60 to 100% by weight of alpha-cellulose and from 0 to 40% by weight of rayon fibres impregnated with thermosetting amino rasin.
Claim 3
Dependent Claim
34 words
Plastics laminate according to Claim 1, characterised in that said translucent sheets are impregnated with a melamine/formaldehyde resin, possibly mixed with a benzoguanamine/formaldehyde and/or acetoguanamine/formaldehyde resin in a ratio of from 1:0.1 to 1:1.
Claim 4
Dependent Claim
22 words
Plastics laminate according to Claim 1 or 2, characterised in that said translucent sheets have a substance of 25 to 100 g/m².
Claim 5
Dependent Claim
29 words
Plastics laminate according to any one of Claims 1 to 3, characterised in that at least some of said translucent sheets are printed by rotogravure, silk-screening or offset printing.
Claim 6
Dependent Claim
39 words
Plastics laminate according to any one of Claims 1 to 4, characterised in that it includes, on at least one of its faces, at least one protective surface sheet ("overlay") with an alpha-cellulose base, impregnated with thermosetting amino resin.
Claim 7
Dependent Claim
19 words
Plastics laminate according to Claim 5, characterised in that the overlay has a substance of 20 to 40 g/m².
Claim 8
Dependent Claim
40 words
Plastics laminate according to any one of Claims 1 to 5, characterised in that it includes at least one decorative sheet which is solid-coloured or printed by rotogravure, silk-screening or offset printing, and is interposed between the substantially translucent sheets.
Claim 9
Dependent Claim
21 words
Decorative plastics laminate according to Claim 7, characterised in that the decorative sheet has a substance of 60 to 160 g/m².
Claim 10
Dependent Claim
24 words
Plastics laminate according to any of Claims 1 to 4 characterized in that it is constituted by a pack of said substantially translucent sheets.
Claim 11
Dependent Claim
73 words
Method for the manufacture of decorative plastics laminates, in which a plurality of cellulose-based sheets impregnated with dried thermosetting resin are stacked and subjected to pressure and heat to bind the sheets together, characterised in that a plurality of translucent sheets are used which are constituted by 60 to 100% by weight of alpha-cellulose and from 0 to 40% by weight of rayon fibres, the sheets being impregnated with a thermosetting amino resin.
Claim 12
Dependent Claim
73 words
Method for the manufacture of decorative plastics laminates, in which a plurality of cellulose-based sheets impregnated with dried thermosetting resin are stacked and subjected to pressure and heat to bind the sheets together, characterised in that a plurality of translucent sheets are used which are constituted by 60 to 100% by weight of alpha-cellulose and from 0 to 40% by weight of rayon fibres, the sheets being impregnated with a thermosetting amino resin.
Claim 13
Dependent Claim
33 words
Method according to Claim 10, characterised in that the sheets are impregnated with a melamine/formaldehyde resin, possibly mixed with a benzoguanamine/formaldehyde and/or acetoguanamine formaldehyde resin in a ratio of from 1:0.1 to 1:1.
Claim 14
Dependent Claim
53 words
Method according to Claim 10 or 11, characterised in that the impregnation and subsequent drying are carried out so as to obtain a resin content of from 40 to 70% by weight, a content of volatile substances of from 4 to 7% of weight, and a flow of from 2 to 20% wt.
Claim 15
Dependent Claim
42 words
Method according to any one of Claims 10 to 12, characterised in that the stacked sheets are subjected to a pressure of from 50 to 100 bars and a temperature of from 120 to 160°C to cause cross-linking of the impregnating resins.
Claim 16
Dependent Claim
36 words
Method according to any one of Claims 10 to 13, characterised in that the translucent sheets have a substance of from 25 to 100 g/m² and are solid-coloured or printed by rotogravure, silk-screening or offset printing.
References Cited (Backward Citations)
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