Cross Linked Biolaminate: Methods, Products and Applications
A method for crosslinking of the biolaminate to meet higher heat resistance and other functional performance needs for biolaminate surfacing products and applications is provided. Using such method, it is possible to change the overall performance characteristics of a biolaminate to address specific needs and applications. The crosslinked biolaminate can be either in a single layer or multilayer construction and either thermoformed or flat laminated onto a rigid composite substrate.
1 . A method for producing a continuous biolaminate sheet, the method comprising:
preparing a sheet from a resin composition comprising a biodegradable resin and a crosslinking promoter;
irradiating the sheet with an ionizing radiation to crosslink the resin composition; and
subjecting the irradiated sheet to heat treatment to continuously prepare a crosslinked biolaminate sheet.
2 . A method for producing a biolaminate film, the method comprising:
providing a biopolymer comprising PLA and an acrylic additive;
adding a photoinitiator to the biopolymer;
compounding the biopolymer and photoiniator;
forming a biolaminate film from the compounded biopolymer and photoinitiator;
curing the biolaminate film to crosslink the biolaminate film.
3 . The method of claim 2 , wherein curing comprises exposing the film to UV radiation.
4 . The method of claim 2 , further comprising adding a crosslinking agent to the biopolymer.
5 . The method of claim 2 , wherein compounding the biopolymer and photoinitiator is done while extruding the film.
6 . A method for production of a crosslinked biodegradable resin continuous biolaminate sheet for decorative and functional surfacing, the method comprising:
preparing a sheet from a resin composition comprising a biobased resin and a crosslinking promoter;
irradiating the sheet with an ionizing radiation to crosslink the resin composition and promoting crosslinking of the biodegradable resin by the crosslinking promoter under ionizing irradiation; and
subjecting the crosslinked sheet to heat treatment to continuously prepare a crosslinked biolaminate sheet.
7 . The method of claim 6 , wherein the biobased resin is selected from the group consisting of PLA, PHA, PHB, and other biobased plastics.
8 . The method of claim 6 , wherein the crosslinking promotor is one of a methacrylate or an acrylate.