JPS6360732A - Polyethylene-2,6-naphthalate film - Google Patents

Polyethylene-2,6-naphthalate film

Info

Publication number
JPS6360732A
JPS6360732A JP20628886A JP20628886A JPS6360732A JP S6360732 A JPS6360732 A JP S6360732A JP 20628886 A JP20628886 A JP 20628886A JP 20628886 A JP20628886 A JP 20628886A JP S6360732 A JPS6360732 A JP S6360732A
Authority
JP
Japan
Prior art keywords
naphthalate
film
polyethylene
less
unevenness
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP20628886A
Inventor
Yujiro Fukuda
Shigeo Uchiumi
Original Assignee
Diafoil Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Diafoil Co Ltd filed Critical Diafoil Co Ltd
Priority to JP20628886A priority Critical patent/JPS6360732A/en
Publication of JPS6360732A publication Critical patent/JPS6360732A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a polyethlene-2,6-naphthalate film excellent in smoothness, easily-sliding property and thickness evenness, by including inert fine particles in the film and specifying the film properties within a specified range.
CONSTITUTION: A polyethylene-2,6-naphthalate film containing 0.01W10wt% inert fine particles whose average particle diameter is 0.1W10μ has characteristics described as follows. The 1/2 crystallization time is 6.0min or less and the degree of plane orientation ΔP and the average reflective index-n satisfy the equations 1 and 2 respectively. Moreover, the numbers of unevenness units per 1mm2 of the film surface area A, where the unevenness is constituted of a projection and a cavity having the projection as its nucleus whose longer diameter is at least 0.2μm or more, satisfy the equation 3 and the longitudinal and the transverse thickness unevenness are both 8% or less. Polyethylene-2,6- naphthalate means polymers constituted of an ethylene-2,6-naphthalate unit and it includes ethylene-2,6-naphthalate polymers modified with small amt., preferably 5% or less of a third component. A film excellent in thickness uniformity and easily-sliding property can be thereby obtained.
COPYRIGHT: (C)1988,JPO&Japio
JP20628886A 1986-09-02 1986-09-02 Polyethylene-2,6-naphthalate film Pending JPS6360732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20628886A JPS6360732A (en) 1986-09-02 1986-09-02 Polyethylene-2,6-naphthalate film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20628886A JPS6360732A (en) 1986-09-02 1986-09-02 Polyethylene-2,6-naphthalate film

Publications (1)

Publication Number Publication Date
JPS6360732A true JPS6360732A (en) 1988-03-16

Family

ID=16520824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20628886A Pending JPS6360732A (en) 1986-09-02 1986-09-02 Polyethylene-2,6-naphthalate film

Country Status (1)

Country Link
JP (1) JPS6360732A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0325724A (en) * 1989-06-23 1991-02-04 Diafoil Co Ltd Oriented polyester film for magnetic disk
JPH05131538A (en) * 1991-11-13 1993-05-28 Teijin Ltd Polyethylene-2, 6-naphthalate film

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0325724A (en) * 1989-06-23 1991-02-04 Diafoil Co Ltd Oriented polyester film for magnetic disk
JPH05131538A (en) * 1991-11-13 1993-05-28 Teijin Ltd Polyethylene-2, 6-naphthalate film

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