Multiwall polycarbonate sheet and method for its production
OwnerJohannes Martinus Dina Goossens, Jan Henk Kamps +4inventors
InventorsJohannes Martinus Dina Goossens, Jan Henk Kamps, Lina Prada, Augustina Martina Tacke-Willemsen, Hendrik Verhoogt, Hendricus Franciscus Zirkzee
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Abstract
A method for producing a thermoplastic sheet includes extruding a composition including a melt polycarbonate resin having a Fries content of about 10 ppm to about 2000 ppm. The composition enables the sheet to be extruded with excellent uniformity.
Claims38
A method for producing a thermoplastic sheet comprising:
- extruding a composition comprising a melt polycarbonate resin having a Fries content of about 10 ppm to about 2000 ppm;
- wherein the melt polycarbonate is the polymerization product of a dihydric phenol and a diester acid.
A method for producing a thermoplastic sheet comprising:
- extruding a composition comprising a melt polycarbonate resin having a Fries content of about 10 ppm to about 2000 ppm;
- and
- extruding the composition through a melt filter;
- wherein the melt polycarbonate is the polymerization product of a dihydric phenol and a diester acid, and
- wherein the melt filter has a pore size of about 10 to about 50 micrometers.
A method for producing a thermoplastic sheet comprising:
- extruding a composition comprising greater than or equal to about 90 weight percent melt polycarbonate having a Fries content of about 50 ppm to about 2000 ppm, wherein the melt polycarbonate is the polymerization product of a dihydric phenol and a diester acid, and wherein the melt polycarbonate has a weight average molecular weight of about 25,000 to about 40,000 atomic mass units.
A method for producing a thermoplastic sheet comprising:
- extruding a composition comprising greater than or equal to about 95 weight percent melt polycarbonate, having a Fries content of about 100 ppm to about 1800 ppm, wherein the melt polycarbonate is the polymerization product of a dihydric phenol and a diester acid, and wherein the melt polycarbonate has a weight average molecular weight of about 30,000 to about 35,000 atomic mass units, and comprises repeating units having the structure:
- 8
A multiwall thermoplastic sheet made by a method comprising:
- extruding a composition comprising a melt polycarbonate resin having a Fries content of about 10 ppm to about 2000 ppm;
- wherein the multiwall thermoplastic sheet has a mass per unit area of about 0.5 to about 8 kilograms per square meter.
A multiwall thermoplastic sheet made by a method comprising:
- extruding a composition comprising a melt polycarbonate resin having a Fries content of about 10 ppm to about 2000 ppm;
- wherein the multiwall thermoplastic sheet has a thickness of about 2 to about 50 millimeters.
A multiwall thermoplastic sheet made by a method comprising:
- extruding a composition comprising a melt polycarbonate resin having a Fries content of about 10 ppm to about 2000 ppm;
- wherein the multiwall thermoplastic sheet has a thickness of about 4 to about 40 millimeters.
A multiwall thermoplastic sheet made by a method comprising:
- extruding a composition comprising a melt polycarbonate resin having a Fries content of about 10 ppm to about 2000 ppm;
- wherein the multiwall thermoplastic sheet comprises a plurality of sections having a maximum relative deviation in mass per unit area less than about 2%.
A solid thermoplastic sheet made by a method comprising:
- extruding a composition comprising a melt polycarbonate resin having a Fries content of about 10 ppm to about 2000 ppm;
- wherein the solid thermoplastic sheet has a mass per unit area of about 0.5 to about 15 kilograms per square meter.
A solid thermoplastic sheet made by a method comprising:
- extruding a composition comprising a melt polycarbonate resin having a Fries content of about 10 ppm to about 2000 ppm;
- wherein the solid thermoplastic sheet has a thickness of about 0.5 to about 15 millimeters.
A solid thermoplastic sheet made by a method comprising:
- extruding a composition comprising a melt polycarbonate resin having a Fries content of about 10 ppm to about 2000 ppm;
- wherein the solid thermoplastic sheet has a thickness of about 1 to about 12 millimeters.
Dependencies are inferred from the claim text.