METHOD FOR MAKING THIN-WALLED, CLOSED-ENDED, TUBULAR ARTICLES OF THERMOPLASTIC ELASTOMERS

WIPO Patent Application WO1995014565

A3

A method to prepare a thermoplastic elastomeric preform for forming or drawing into a thin walled, closed-ended, tubular article having a wall thickness of between about 0.005 and 0.25 mm, is disclosed, the method comprising: (i) providing a tubular mold (5) having a longitudinal axis, a terminal end, and an opposite open end, said open end having a rim (4); (ii) heating a thermoplastic elastomer to a sufficient temperature to substantially eliminate the crystalline regions, whereby the viscosity and elasticity of said thermoplastic elastomer are substantially reduced, and shaping said thermoplastic elastomer to form a preform having two substantially coplanar opposing faces; (iii) cooling said thermoplastic elastomer whereby the viscosity and elasticity are recovered within a range that the preform can be drawn; and (iv) placing a face of said preform of thermoplastic elastomer on said rim.

MILLER ROBERT G
MILLER WILLIAM C
TANKOVITZ OSKAR T

PCT/CA1994/000656

August 03, 1995

November 25, 1994

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ORTHO MCNEIL INC (CA)

A61F6/04; B29B11/06; B29B13/02; B29C43/00; B29C51/04; B29C51/08; B29C51/10; B29C51/42; B29C67/00; B29C71/00; B29C71/02; C08J5/18; B29C35/02; B29C43/02; B29C43/24; B29C67/04; B29K21/00; B29L31/48; (IPC1-7): B29C51/04; B29C51/02; A61F6/04; B29C71/02; B29C55/22

WO1990005506A1	1990-05-31
WO1989002256A1	1989-03-23
WO1992011828A1	1992-07-23
WO1993006796A2	1993-04-15
WO1994009965A1	1994-05-11
WO1993019704A1	1993-10-14

GB2218666A	1989-11-22
US4552717A	1985-11-12
US4359160A	1982-11-16
GB938465A	1963-10-02
DE1766519A1	1972-03-23
GB1250553A	1971-10-20

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