Copolyester tape
AssigneeSabic Global Technologies B.V.
InventorsBander Al-Farhood, Zahir Bashir, Satishkumar Mahanth, Roshan Kumar Jha, Kummetha Raghunatha Reddy
Life of this patent
Estimating the term…
Abstract
Provided is a tape including a composition having a copolyester including polymeric units derived from ethylene glycol and terephthalic acid or a diester thereof and >0.50 and <5.00 wt % of polymeric units with regard to the total weight of the polyester derived from an oligomeric dihydroxy compound having a number average molecular weight of >500 g/mol and <5000 g/mol. Such tape has an improved tensile-impact strength and a reduced proneness to splitting during weaving.
Claims19
A tape comprising a composition comprising:
- a copolyester comprising polymeric units derived from ethylene glycol and terephthalic acid or a diester thereof and >0.50 and <5.00 wt % of polymeric units with regard to the total weight of the polyester derived from an oligomeric dihydroxy compound having a number average molecular weight of >500 g/mol and <5000 g/mol.
A tape comprising a composition comprising:
- a copolyester comprising polymeric units derived from ethylene glycol and terephthalic acid or a diester thereof;
- and
- >0.50 and <5.00 wt % of polymeric units with regard to the total weight of the polyester derived from an oligomeric dihydroxy compound having a number average molecular weight of >500 g/mol and <5000 g/mol;
- wherein the polyester has an intrinsic viscosity as determined in accordance with ASTM D2857-95 (2007) of >0.50 and <2.50 dl/g;
- wherein the tape has a width of ≥1.0 and ≤50.0 mm and a thickness of ≥10 μm and ≤250 μm;
- wherein the tape is unidirectionally oriented along the longitudinal axis;
- and
- wherein the tape is stretched to a drawing rate of >4 and <10, wherein the drawing rate is the ratio of the length of the tape subsequent to stretching and the length of the tape prior to stretching.
Dependencies are inferred from the claim text.