US5981029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas barrier film containing inorganic stratified particles and a production method thereof
Assignee: Toray Industries Inc
•
Filing: 1997-03-28
•
Granted: 1999-11-09
•
Expires: 2017-03-28
Abstract
Abstract A gas barrier film comprises a thermoplastic resin substrate and on the substrate a gas barrier coating, which coating comprises a water soluble or water dispersible high polymer and inorganic stratified particles. In one film, the surface of the gas barrier coating remote from the substrate has a roughness parameter Rt/Ra of 25 or less. In an alternative film, the gas barrier coating contains an amine compound represented by the following general formula: ##STR1## where R1 stands for a hydrogen atom, or a C 1-6 alkyl or allyl or phenyl group; R2 stands for a hydrogen atom, or an optionally substrated alkyl or allyl group; and R3 stands for an optionally substituted alkyl or allyl group.
Inventors
- 👤 Yutaka Harada
- 👤 Masahiro Kimura
- 👤 Koukichi Hashimoto
- 👤 Koichi Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:19
CPC Classifications
C; C09; C09D; C09D5/00; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J7/048; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/25; Y10T428/254; Y10T428/259; Y10T428/26; Y10T428/269
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
86 words
A gas barrier film which comprises a polyolefin based resin substrate having thereon a gas barrier coating, which coating comprises a water soluble or water dispersible high polymer and inorganic stratified particles and which coating has a surface remote from the substrate, wherein said surface has a surface roughness parameter Rt/Ra of 25 or less, a number of undulations having a diameter of 25 to 100 μm of 1 to 150 undulations/mm 2 and said coating has a water content of 2.5 mg/cm 3 or less.
Claim 2
Dependent Claim
86 words
A gas barrier film which comprises a polyolefin based resin substrate having thereon a gas barrier coating, which coating comprises a water soluble or water dispersible high polymer and inorganic stratified particles and which coating has a surface remote from the substrate, wherein said surface has a surface roughness parameter Rt/Ra of 25 or less, a number of undulations having a diameter of 25 to 100 μm of 1 to 150 undulations/mm 2 and said coating has a water content of 2.5 mg/cm 3 or less.
Claim 3
Dependent Claim
19 words
A gas barrier film according to claim 1, having a heat shrinkage at 120° C. of 1% or less.
Claim 4
Dependent Claim
84 words
A gas barrier film which comprises a thermoplastic resin substrate and a coating thereon, which coating comprises a water soluble or water dispersible high polymer and inorganic stratified particles, and which said coating contains an amine compound represented by the following general formula: ##STR4## (R1 stands for a hydrogen atom, or C 1-6 alkyl or allyl or phenyl group; R2 stands for a hydrogen atom, or an optionally substituted alkyl or allyl group; and R3 stands for an optionally substituted alkyl or allyl group).
Claim 5
Dependent Claim
84 words
A gas barrier film which comprises a thermoplastic resin substrate and a coating thereon, which coating comprises a water soluble or water dispersible high polymer and inorganic stratified particles, and which said coating contains an amine compound represented by the following general formula: ##STR4## (R1 stands for a hydrogen atom, or C 1-6 alkyl or allyl or phenyl group; R2 stands for a hydrogen atom, or an optionally substituted alkyl or allyl group; and R3 stands for an optionally substituted alkyl or allyl group).
Claim 6
Dependent Claim
39 words
A gas barrier film according to claim 3, wherein the amine compound is an alkylamine having 1 to 4 carbon atoms, or an amino acid having 1 to 7 carbon atoms or a silane coupling agent having amino group.
Claim 7
Dependent Claim
31 words
A gas barrier film according to claim 1 or 3, wherein number of any surface defects of 0.2 μm or more on the said coating surface is 5/10 cm2 or less.
Claim 8
Dependent Claim
25 words
A gas barrier film according to claim 1 or 3, wherein the said coating surface has a surface parameter Rp of 1.4 μm or less.
Claim 9
Dependent Claim
23 words
A gas barrier film according to claim 1 or 3, wherein the coating has a water content of 2 mg/cm 3 or less.
Claim 10
Dependent Claim
82 words
A gas barrier film according to claim 1 or 3, wherein the relative intensity of a peak in the infra-red spectrum originating from polar groups of the water soluble or water dispersible polymer satisfies the following formula: P=100×(Pw-Pd)/Pd<35 Pw: Relative intensity of a peak originating from polar groups of the water soluble or water dispersible polymer in a wet condition Pd: Relative intensity of a peak originating from polar groups of the water soluble or water dispersible polymer in a dry condition.
Claim 11
Dependent Claim
27 words
A gas barrier film according to claim 1 or 3, wherein the coating contains 0.01 to 10 wt % of a crosslinking agent as a monomer component.
Claim 12
Dependent Claim
20 words
A gas barrier film according to claim 1 or 3, wherein the coating is oriented in at least one direction.
Claim 13
Dependent Claim
30 words
A gas barrier film according to claim 1 or 3, wherein the water soluble or water dispersible high polymer is a polyvinyl alcohol based polymer or any of its derivatives.
Claim 14
Dependent Claim
26 words
A gas barrier film according to claim 11, wherein the polyvinyl alcohol based polymer or any of its derivatives has at least two different constituents thereof.
Claim 15
Dependent Claim
25 words
A gas barrier film according to claim 1 or 3, wherein the inorganic stratified particles comprise particles having a diameter of 200 nm or less.
Claim 16
Dependent Claim
25 words
A gas barrier film according to claim 1 or 3, wherein the inorganic stratified particles comprise particles having a diameter of 1 μm or more.
Claim 17
Dependent Claim
26 words
A gas barrier film according to claim 1 or 3, wherein the coating contains at least two kinds of inorganic stratified particle having different respective diameters.
Claim 18
Dependent Claim
24 words
A gas barrier film according to claim 1 or 3, wherein a layer of a metal and/or metallic oxide is formed on the coating.
Claim 19
Dependent Claim
28 words
A gas barrier film according to claim 1 or 3, wherein a layer of a metal and/or metallic oxide is formed between the coating and the resin substrate.
Claim 20
Dependent Claim
23 words
A gas barrier film according to claim 1 or 3, wherein the surface roughness parameter R t /R a is 20 or less.
Claim 21
Dependent Claim
24 words
A gas barrier film according to claim 1 or 3, wherein the surface roughness parameter R t /R a is about 17 or less.
Claim 22
Dependent Claim
23 words
A gas barrier film according to claim 1 or 3, wherein the coating has a water content of 1.5 mg/cm 3 or less.
References Cited (Backward Citations)
US4104438A
Cited
US4180614A
Cited
EP0301878A1
Cited
US4978572A
Cited
EP0518647A1
Cited
US5700560A
Cited
US5763088A
Cited
US5667886A
Cited
EP0691376A1
Cited
US5766751A
Cited
JPH1093542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-08 | 2003-05-10 | 2003-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-08 | 2007-05-10 | 2007-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-08 | 2011-05-10 | 2011-11-09 | $7700.00 | Window Closed / Lapsed |