Patent
Stretched polyester film from a polymer blend
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TLDR
A transparent polyester film having excellent printability, flexing resistance and pinhole resistance and further excellent interlaminar strength, which is made from a polymer mixture or blend comprising (i) a polyester consisting essentially of a residue of dibasic acids wherein at least 80 % by mol is terephthalic acid and residue of at least one glycol and (ii) a block copolyester consisting of a crystalline polyester (hard) segment having a high melting point and a soft polymer segment having low melting point, and a number average molecular weight ofAbstract:
A transparent polyester film having excellent printability, flexing resistance and pinhole resistance and further excellent interlaminar strength, which is made from a polymer mixture or blend comprising (i) a polyester consisting essentially of a residue of dibasic acids wherein at least 80 % by mol is terephthalic acid and a residue of at least one glycol and (ii) a block copolyester consisting of a crystalline polyester (hard) segment having a high melting point and a soft polymer segment having a low melting point and a number average molecular weight of 400 to 8,000, said soft polymer segment having a low melting point being contained in an amount of 0.5 to 10 % by weight on the basis of the whole weight of the polymer mixture or blend, and said crystalline polyester segment having a melting point of at least 170° C when a polymer is produced by the monomers composing the segment alone and said soft polymer segment having a melting or softening point of 100° C or lower.read more
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References
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Film excellent in slip characteristics and its production
TL;DR: In this paper, a polyester block copolymer with a melting temperature of about 40° to 120°C to solidify it is presented. But the melting point of a self-supporting high polymer substantially constituted with the monomer components of the said crystalline polyester segments alone being not lower than about 200°C and the non-crystalline polymer segments themselves being not higher than about 80°C.
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Production of elastomers
TL;DR: In this paper, the authors present a procedure for producing ELASTOMERIC POLYETHYLENE TEREPHTHALATE-POLY(TetramethylENE OXIDE) GLYCOL BLOCK COPOLYMER, which is used to produce ELastomeric POLYethylenes.
Patent
Process of forming heat shrinkable polyethylene terephalate film
TL;DR: A biaxially oriented polyethylene terephthalate film has balanced shrinkage of at least 40 percent in both longitudinal and transverse directions and the process for forming the film is described in this paper.