PROCESSING OF ELECTRICAL INSULATING POLYETHYLENE NAPHTHALATE FILM

Title:

PROCESSING OF ELECTRICAL INSULATING POLYETHYLENE NAPHTHALATE FILM

Document Type and Number:

Japanese Patent JPH06335960

Kind Code:

A

Abstract:

PURPOSE: To obtain an improved technology processing a polyethylene naphthalate (PEN) film to produce a slot or wedge being an electrical insulating material.

CONSTITUTION: When a biaxially oriented PEN film with a thickness of-125-450μm is processed into a slot or wedge being the electrical insulating material in a motor, a processing method holding the temp. of the film to 25-80°C to prevent delamination during processing and a molding processing method setting the radius of curvature of the leading end of a processing punch at the time of the molding processing of the wedge to 75-500μm and adjusting the clearance between the wall surface of the punch and a die to [film thickness + (75-400μm)] are employed.

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Inventors:

SAITO KAZUYOSHI
TOMITA HIROSHI

Application Number:

JP12698593A

Publication Date:

December 06, 1994

Filing Date:

May 28, 1993

Export Citation:

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Assignee:

TEIJIN LTD

International Classes:

B29C51/08; B29C51/42; B29K67/00; B29L22/00; (IPC1-7): B29C51/08; B29C51/42

Attorney, Agent or Firm:

Maeda Junhiro

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