WHEREIN (A) R REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND AN ALKYL RADICAL CONTAINING FROM 1 TO 6 CARBON ATOMS, (B) R1, INDIVIDUALLY, REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND AN ALKYL RADICAL CONTAINING FROM 1 TO 6 CARBON ATOMS, AND (C) EACH N REPRESENTS AN INTEGER FROM 0 TO 3.
摘要:
1,126,034. Drawing sheet material. GLANZSTOFF A.G. 2 Dec., 1965 [3 Dec., 1964], No. 51244/65. Heading B5A. A process for the production of an article from polyethylene terephthalate having a solution viscosity between 1À4 and 1À7 and a degree of crystallization of 0% to 25% comprises heating a plate or film of said material to a temperature between 75‹ and 180‹ C., shaping the heated plate or film by vacuum deepdrawing and immediately after the shaping, cooling the resultant article in the mould to a temperature below 70‹ C. The vacuum deepdrawing may be effected using a male or female mould assisted by mechanical or pneumatic pre-stretching if desired. The plate or film is advantageously heated by infra-red radiations and the formed article is cooled preferably by blasts of a cold inert gas.
摘要:
1. A BLEND COMPRISING (I) FROM ABOUT 5 TO ABOUT 95 WEIGHT PERCENT OF BIODEGRADABLE THERMOPLASTIC DIALKANOYL POLYMER, SAID POLYMER HAVING A REDUCED VISCOSITY VALUE OF AT LEAST 0.1 AND UPWARDS TO ABOUT 10 AND BEING FURTHER CHARACTERIZED IN THAT AT LEAST ABOUT 10 WEIGHT PERCENT OF SAID THERMOPLASTIC DIALKANOYL POLYMER IS ATTRIBUTABLE TO RECURRING UNITS OF THE FORMULA
-(O-R''-OOC-R-CO)-
WHEREIN R REPRESENTS A DIVALENT ALIPHATIC HYDROCARBON RADICAL, AND WHEREIN R'' IS OF THE GROUP CONSISTING OF DIVALENT ALIPHATIC HYDROCARBON RADICALS AND DIVALENT ALIPHATIC OXA-HYDROCARBON RADICALS, AND (II) FROM ABOUT 5 TO ABOUT 95 WEIGHT PERCENT OF NATURALLY OCCURING BIODEGRADABLE PRODUCT, BASED ON THE TOTAL WEIGHT OF SAID BLEND.