EP0378154A1
Expired / Lapsed
EP
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Biaxially oriented polyester film
Assignee: Toray Industries Inc
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Filing: 1990-01-08
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Granted: —
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Expires: 2010-01-08
Abstract
Abstract A biaxially oriented polyester film having excellent scratch resistance and chipping resistance by the inclusion of particles (A) having an average primary particle diameter of 5-300 nm, an average degree of aggregation of 5-100 and a Mohs'hardness of 6-10 by the content of 0.01-5 wt.%. The scratch resistance and chipping resistance of the film can be further increased by the inclusion of particles (B) having an average particle diameter of 0.3-3 µm, a Mohs'hardness smaller than that of particles (A) and/or non-incorporated particles.
Inventors
- 👤 Satoru Nishino
- 👤 Koichi Palace Rakuhoku 411 Abe
- 👤 Takeo Fukuyama
- 👤 Hidehito Minamizawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 01:55
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B29; B29C; B29C55/00; B29C55/02; B29C55/10; B29C55/12; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L67/00; C08L67/02; B29K; B29K2995/00; B29K2995/0037; B29K2995/0072; C08J2367/00; C08J2367/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/24983; Y10T428/25; Y10T428/254; Y10T428/256; Y10T428/257; Y10T428/259
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
39 words
A biaxially oriented polyester film characterized by the inclusion of particles (A) having an average primary particle diameter of 5-300 nm, an average degree of aggregation of 5-100 and a Mohs'hardness of 6-10 by the content of 0.01-5 wt.%.
Claim 2
Dependent Claim
39 words
A biaxially oriented polyester film characterized by the inclusion of particles (A) having an average primary particle diameter of 5-300 nm, an average degree of aggregation of 5-100 and a Mohs'hardness of 6-10 by the content of 0.01-5 wt.%.
Claim 3
Dependent Claim
33 words
The film according to claim 1 wherein said particles (A) are at least one kind of alumina particles selected from the group consisting essentially of β-type, γ-type and δ-type crystal form alumina particles.
Claim 4
Dependent Claim
26 words
The film according to claim 2 wherein the rate of δ-type crystal form alumina particles in said particles (A) is not less than 60% by weight.
Claim 5
Dependent Claim
29 words
The film according to claim 1 wherein said particles (A) are at least one kind of particles selected from the group consisting of zirconia particles and titanium nitride particles.
Claim 6
Dependent Claim
24 words
The film according to any preceding claim wherein the average primary particle diameter of said particles (A) is in the range of 10-100 nm.
Claim 7
Dependent Claim
23 words
The film according to any preceding claim wherein the average degree of aggregation of said particles (A) is in the range of 10-50.
Claim 8
Dependent Claim
24 words
The film according to any preceding claim wherein the content of said particles (A) in said film is in the range of 0.1-1 wt.%.
Claim 9
Dependent Claim
40 words
The film according to any preceding claim wherein the main component of the polyester of said film is at least one kind of polymer selected from the group consisting of polyethylene terephthalate, polyethylene-α, β-bis (2-chlorphenoxy)-ethane 4,4′-dicarboxylate, polyethylene2,6-naphthalate and polybutylene terephthalate.
Claim 10
Dependent Claim
21 words
The film according to any preceding claim wherein the shape coefficient of said particles (A) is in the range of 0.85-1.0.
Claim 11
Dependent Claim
22 words
The film according to any preceding claim wherein the average surface roughness of said film is in the range of 0.003-0.030 µm.
Claim 12
Dependent Claim
21 words
The film according to any preceding claim wherein the planar orientation index of said film is in the range of 0.935-0.975.
Claim 13
Dependent Claim
20 words
The film according to any preceding claim wherein the density index of said film is in the range of 0.02-0.05.
Claim 14
Dependent Claim
23 words
The film according to any preceding claim wherein the friction coefficient of the surface of said film is in the range of 0.20-0.35.
Claim 15
Dependent Claim
22 words
The film according to any preceding claim wherein the surface specific resistivity of said film is less than 1 x 10¹⁵ Ω·cm.
Claim 16
Dependent Claim
24 words
The film according to any preceding claim wherein the orientation ratio in the transverse direction of said film is in the range of 30-80.
Claim 17
Dependent Claim
35 words
A biaxially oriented polyester film according to any preceding claim further including particles (B) having an average particle diameter of 0.3-3µm, the Mohs'hardness of said particles (A) being greater than that of said particles (B).
Claim 18
Dependent Claim
17 words
The film according to claim 16 wherein the Mohs'hardness of said particles (B) is less than 6.
Claim 19
Dependent Claim
23 words
The film according to claim 16 or 17 wherein the coefficient of crystallization acceleration of said particles (B) is not greater than 15°C.
Claim 20
Dependent Claim
24 words
The film according to any one of claims 16 to 18 wherein the content of said film is in the range of 0.005-1.0 wt.%.
Claim 21
Dependent Claim
44 words
The film according to any one of claims 16 to 19 wherein said particles (B) are at least one kind of particles selected from the group consisting of inorganic particles including calcium carbonate particles, calcium phosphate particles and silica particles and organic polymeric particles.
Claim 22
Dependent Claim
33 words
The film according to any one of claims 16 to 20 wherein the difference between the Mohs'hardness of said particles (A) and the Mohs'hardness of said particles (B) is not less than 1.
Claim 23
Dependent Claim
14 words
A biaxially oriented polyester film according to any preceding claim further including non-incorporated particles.
Claim 24
Dependent Claim
21 words
The film according to claim 22 wherein the average particle diameter of said non-incorporated particles is in the range of 0.2-20µm.
Claim 25
Dependent Claim
25 words
The film according to claim 22 or 23 wherein the content of said non-incorporated particles in said film is in the range of 0.01-2 wt.%.
Claim 26
Dependent Claim
27 words
The film according to any preceding claim wherein said film is laminated on, at least, one surface of a polyester film to form a composite polyester film.
References Cited (Backward Citations)
US3884870A
Cited
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