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US 12,377,634 B2Granted
Composite sheet and manufacturing method for a foamed decorative sheet free of PVC and plasticizers
AssigneeDg Dimense, Uab
InventorAleksey Etin
Life of this patent
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Abstract
A composite sheet and a method for producing a decorative sheet using the composite sheet are provided. The composite sheet has a base layer and a foamable layer bonded to the base layer. The foamable layer includes 100 parts by weight of a polyolefin material having an elastic modulus of <0.1 GPa, 0.1-10 parts by weight of a foaming agent, and 0-200 parts by weight of additives. The foamable layer has a thickness of 0.05 to 0.3 mm.
Claims9
A method for producing a foamed decorative sheet, the method comprising:
- melt processing a foamable layer on a base layer to form a curling-free composite sheet, the base layer being made of a paper or non-woven material, the paper or non-woven material having a first thickness of 0.1 mm, a first elastic modulus of >1 GPa, and showing a change of dimensions of less than 2% when heated from 0° C. to 220° C. and subsequently cooled to 0° C., the foamable layer having a second thickness of 0.15 mm, being made of components mixed at 140° C., 60 RPM, and subsequently being laminated on the paper or non-woven material at 140° C., the components consisting of 100 parts by weight of an Ethylene-octene copolymer, having a melt flow index of 5, and a second elastic modulus of 0.011 GPa, 5 parts by weight of Azodicarbonamide, and 1 part by weight of ZnO;
- printing on the curling-free composite sheet;
- and
- foaming of the curling-free composite sheet.
1 more element
Dependencies are inferred from the claim text.