Method for making a part with clearance volume by rotational...

Details Method for making a part with clearance volume by rotational... Method for making a part with clearance volume by rotational...

2007-07-24

2007-07-24

Miggins, Michael C. (Department: 1772)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

C264S310000, C264S255000, C156S074000

Reexamination Certificate

active

10344558

ABSTRACT:
A cylindrical element is manufactured by a process which includes depositing successive layers of thermoplastic materials in a cycle by rotation moulding, or by a technique enabling a deposit of successive layers, the cycle including at least one deposit by rotation moulding or by a technique enabling deposit of successive layers at a temperature from 170 to 240° C. The cylindrical element contains at least one layer containing an ethylene-vinyl alcohol copolymer with a density at the above temperature of between 0.94 and 1.4, and a melt flow index of between 1.3 and 4.2 g/10 minutes.

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