POLYESTER RESIN COMPOSITIONS FOR CALENDERING
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Abstract
A polyester resin composition is calendered to produce a film or a sheet. The polyester resin composition is a polyester having a crystallization half time from a molten state of at least 5 minutes combined with an additive for preventing sticking of the polyester to calendering rolls.
29 Citations
58 Claims
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1-32. -32. (canceled)
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33. A polyester resin composition for calendering, comprising
(a) a polyester comprising (i) 100 mole % of terephthalic acid residues as an acid component, and (ii) 12 to 31 mole % of 1,4-cyclohexanedimenthanol residues and 69 to 88 mole % of ethylene glycol residues as a glycol component; - and
(b) an additive selected from the group consisting of metal salts of organic acids, fatty acids or esters thereof, and glycerol monostearate in an amount sufficient to prevent the polyester from sticking to calender rolls. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40)
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41. A process for manufacturing a polyester film or sheet, comprising
introducing a polyester resin composition in pellet, powder, or molten form between at least two adjacent calender rolls, wherein the polyester resin composition comprises (a) a polyester comprising (i) 100 mole % of terephthalic acid residues as an acid component, and (ii) 12 to 31 mole % of 1,4-cyclohexanedimenthanol residues and 69 to 88 mole % of ethylene glycol residues as a glycol component; - and
(b) an additive selected from the group consisting of metal salts of organic acids, fatty acids or esters thereof, and glycerol monostearate in an amount sufficient to prevent the polyester from sticking to the calender rolls. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A calendered film or sheet made from a polyester resin composition comprising
(a) a polyester comprising (i) 100 mole % of terephthalic acid residues as an acid component, and (ii) 12 to 31 mole % of 1,4-cyclohexanedimenthanol residues and 69 to 88 mole % of ethylene glycol residues as a glycol component; - and
(b) an additive selected from the group consisting of metal salts of organic acids, fatty acids or esters thereof, and glycerol monostearate in an amount sufficient to prevent the polyester from sticking to calender rolls. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58)
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Specification