US4971950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support sheet for thermal transfer image-receiving sheet and method of producing same
Assignee: Sony Corp
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Filing: 1989-06-16
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Granted: 1990-11-20
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Expires: 2009-06-16
Abstract
Abstract A support sheet useful for a thermal transfer image receiving sheet having a high resistance to thermal curling and capable of recording clear and uniform images or pictures thereon, comprises a sheet substrate with a thickness of 20 to 300 μm, and multilayer front and back surface coating plastic films each comprising a pigment and a polyolefin resin, each having at least one bi-axially oriented base layer, and bonded to the sheet substrate, and satisfies the following relationships: S.sub.1 /S.sub.2 ≦1/2 S.sub.3 <S.sub.1 wherein S 1 =heat shrinkage of the front surface coating film, S 2 =heat shrinkage of the back surface coating film and S 3 =heat shrinkage of the sheet substrate, determined at 100°±2° C. for 10 minutes in accordance with JIS K-6734-1975.
Inventors
- 👤 Masaru Kato
- 👤 Toshihiro Minato
- 👤 Toshikazu Nagura
- 👤 Susumu Hasegawa
- 👤 Kenji Yasuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:04
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/382; B41M5/38207; B41M5/38214; B41M5/41; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31938
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
209 words
A support sheet for a thermal transfer image-receiving sheet, comprising: (A) a sheet substrate having a thickness of 20 to 300 μm; (B) a front surface coating film layer consisting of a multilayer film comprising at least one biaxially oriented base layer having as a main component a mixture of a polyolefin resin with an inorganic pigment, said surface coating being formed on and bonded to a front surface of the sheet substrate; and (C) a back surface coating film layer consisting of a multilayer film comprising at least one biaxially oriented base layer having as a main component a mixture of a polyolefinic resin with an inorganic pigment, said surface coating being formed on and bonded to a back surface of the sheet substrate, said sheet substrate and the front and back surface coating films satisfying heat shrinkage relationships (1) and 2): S.sub.1 S.sub.2 ≦1/2 (1) S.sub.3 <S.sub.1 ( 2) wherein S 1 represents a heat shrinkage of the front surface coating film, S 2 represents a sheet shrinkage of the back surface coating film, and S 3 represents a heat shrinkage of the sheet substrate, determined at a temperature of 100±2° C. for 10 minutes in accordance with Japanese Industrial Standard (JIS) K-6734-1975, 6.6 Heat Shrinkage Test.
Claim 2
Dependent Claim
209 words
A support sheet for a thermal transfer image-receiving sheet, comprising: (A) a sheet substrate having a thickness of 20 to 300 μm; (B) a front surface coating film layer consisting of a multilayer film comprising at least one biaxially oriented base layer having as a main component a mixture of a polyolefin resin with an inorganic pigment, said surface coating being formed on and bonded to a front surface of the sheet substrate; and (C) a back surface coating film layer consisting of a multilayer film comprising at least one biaxially oriented base layer having as a main component a mixture of a polyolefinic resin with an inorganic pigment, said surface coating being formed on and bonded to a back surface of the sheet substrate, said sheet substrate and the front and back surface coating films satisfying heat shrinkage relationships (1) and 2): S.sub.1 S.sub.2 ≦1/2 (1) S.sub.3 <S.sub.1 ( 2) wherein S 1 represents a heat shrinkage of the front surface coating film, S 2 represents a sheet shrinkage of the back surface coating film, and S 3 represents a heat shrinkage of the sheet substrate, determined at a temperature of 100±2° C. for 10 minutes in accordance with Japanese Industrial Standard (JIS) K-6734-1975, 6.6 Heat Shrinkage Test.
Claim 3
Dependent Claim
32 words
The support sheet as claimed in claim 1, wherein the sheet substrate comprises a member selected from the group comprising paper sheets, coated paper sheets, polyester films, polyolefin films and polyamide films.
Claim 4
Dependent Claim
20 words
The support sheet as claimed in claim 1, wherein the sheet substrate has a heat shrinkage of 0.1% or less.
Claim 5
Dependent Claim
22 words
The support sheet as claimed in claim 1, wherein the front surface coating film has a heat shrinkage of 0.2% or less.
Claim 6
Dependent Claim
22 words
The support sheet as claimed in claim 1, wherein the back surface coating film has a heat shrinkage of 0.2 to 2%.
Claim 7
Dependent Claim
22 words
The support sheet as claimed in claim 1, wherein the front surface coating layer has a thickness of 10 to 200 μm.
Claim 8
Dependent Claim
22 words
The support sheet as claimed in claim 1, wherein the back surface coating layer has a thickness of 10 to 200 μm.
Claim 9
Dependent Claim
30 words
The support sheet as claimed in claim 1, wherein the thickness of the front surface coating film is not the same as the thickness of the back surface coating film.
Claim 10
Dependent Claim
108 words
The support sheet as claimed in claim 8, wherein the sheet substrate and the front and back surface coating films satisfy the following thickness relationships: ______________________________________
10 ≦ X.sub.3 - X.sub.1 ≦ 40
100 ≦ X.sub.1 + X.sub.2 + X.sub.3 ≦ 370
X.sub.1 ≧ 30
20 ≦ X.sub.2 ≦ 300
______________________________________ wherein X 2 represents a thickness in μm of the sheet substrate, X 1 represents a thickness in μm of a thinner of the front and back surface coating films, and X 3 represents a thickness in μm of the other of the front and back surface coating films which is thicker than the thinner surface coating.
Claim 11
Dependent Claim
45 words
The support sheet as claimed in claim 1, wherein the sheet substrate comprises an adhesive layer of an adhesive material; and at least one intermediate layer comprising a pigment and a binder resin material and formed on at least one side of the adhesive layer.
Claim 12
Dependent Claim
21 words
The support sheet as claimed in claim 10, wherein the intermediate layer has a thickness of from 10 to 50 μm.
Claim 13
Dependent Claim
25 words
The support sheet as claimed in claim 10, wherein the pigment in the intermediate layer has an oil absorption of 50 ml/100 g or more.
Claim 14
Dependent Claim
31 words
The support sheet as claimed in claim 10, wherein the pigment in the intermediate layer comprises at least one member selected from precipitated calcium carbonate, calcinated kaolin and finely pulverized silica.
Claim 15
Dependent Claim
39 words
The support sheet as claimed in claim 10, wherein the binder resin material comprises at least one member selected from the group consisting of styrene-butadiene copolymers, methyl methacrylate-styrene-butadiene copolymers, vinyl acetate homopolymers and copolymers and acrylic homopolymers and copolymers.
Claim 16
Dependent Claim
34 words
The support sheet as claimed in claim 10, wherein the adhesive agent consists essentially of at least one member selected from the group consisting of polyether resin adhesive agents and polyester resin adhesive agents.
Claim 17
Dependent Claim
21 words
The support sheet as claimed in claim 10, wherein the adhesive layer has a thickness of from 1 to 30 μm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-19 | 1994-05-21 | 1994-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-19 | 1998-05-21 | 1998-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-19 | 2002-05-21 | 2002-11-20 | $7700.00 | Window Closed / Lapsed |