US4966805A
Expired / Lapsed
US
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Heat-shrinkable polystyrene-base foamed composite sheet
Assignee: Mitsui Chemicals Inc
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Filing: 1990-03-20
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Granted: 1990-10-30
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Expires: 2010-03-20
Abstract
Abstract The invention relates to a heat-shrinkable polystyrene-base foamed sheet prepared by laminating a heat-shrinkable polystyrene-base foamed sheet and a heat-shrinkable polystyrene-base film with a polyurethane-base adhesive wherein printing is applied to the laminating surface of the sheet and/or the film.
Inventors
- 👤 Hiroshi Ezawa
- 👤 Takayuki Watanabe
- 👤 Hiroaki Tsushima
- 👤 Zyuzo Nishiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:47
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B32B27/00; B32B27/06; B32B27/065; B32B27/30; B32B27/302; B32B7/00; B32B7/04; B32B7/12; C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0228; B32B2307/00; B32B2307/70; B32B2307/732; B32B2307/734; B32B2307/736; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249985; Y10T428/249987; Y10T428/249991; Y10T428/249992
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
30 words
A heat-shrinkable polystyrene-base foamed composite sheet prepared by laminating a heat-shrinkable polystyrene-base foamed sheet and a heat-shrinkable polystyrene-base film by applying a polyurethane-base adhesive between said foamed and said film.
Claim 2
Dependent Claim
30 words
A heat-shrinkable polystyrene-base foamed composite sheet prepared by laminating a heat-shrinkable polystyrene-base foamed sheet and a heat-shrinkable polystyrene-base film by applying a polyurethane-base adhesive between said foamed and said film.
Claim 3
Dependent Claim
32 words
A heat-shrinkable polystyrene-base foamed composite sheet prepared by laminating a heat-shrinkable polystyrene-base foamed sheet and a printed heat-shrinkable polystyrene-base film by applying a polyurethane-base adhesive between said foamed sheet and said film.
Claim 4
Dependent Claim
32 words
A heat-shrinkable polystyrene-base foamed composite sheet prepared by laminating a heat-shrinkable polystyrene-base foamed sheet and a printed heat-shrinkable polystyrene-base film by applying a polyurethane-base adhesive between said foamed sheet and said film.
Claim 5
Dependent Claim
44 words
A heat-shrinkable polystyrene-base foamed composite sheet prepared by laminating a heat-shrinkable polystyrene-base foamed sheet and a heat shrinkable polystyrene-base film by applying a polyurethane base adhesive between said foamed sheet and said film to form a composite sheet and applying printed to said sheet.
Claim 6
Dependent Claim
44 words
A heat-shrinkable polystyrene-base foamed composite sheet prepared by laminating a heat-shrinkable polystyrene-base foamed sheet and a heat shrinkable polystyrene-base film by applying a polyurethane base adhesive between said foamed sheet and said film to form a composite sheet and applying printed to said sheet.
Claim 7
Dependent Claim
39 words
heat-shrinkable polystyrene-base foamed composite sheet of claim 1 wherein said heat-shrinkable polystyrene-base foamed sheet has a thickness of from 0.10 to 1.0 mm and an apparent density of from 0.15 to 0.70 g/cm 3 and said heat-shrinkable polystyrene-base film.
Claim 8
Dependent Claim
42 words
The heat-shrinkable polystyrene-base foamed composite sheet of claim 1 wherein said heat-shrinkable polystyrene-base foamed sheet had a heat-shrinkability of from 30 to 70% in a first direction and a heat-shrinkability of less than 20% in second direction on heating at 120° C.
Claim 9
Dependent Claim
25 words
The heat-shrinkable polystyrene-base foamed composite sheet of claim 1 wherein said heat-shrinkable polystyrene-base foamed sheet comprises a first solid layer and a second foamed layer.
Claim 10
Dependent Claim
20 words
The heat-shrinkable polystyrene-base foamed composite sheet of claim 1 wherein said polyurethane base adhesive is a non-solvent type polyurethane-base adhesive.
Claim 11
Dependent Claim
24 words
The heat-shrinkable polystyrene-base foamed composite sheet of claim 1 wherein said polyurethane-base adhesive is applied in a thickness of from 1 to 10 μm.
Claim 12
Dependent Claim
65 words
The heat-shrinkable polystyrene-base foamed composite sheet of claim 2 wherein said heat-shrinkable polystyrene-base foamed sheet has a thickness of from 0.10 to 1.0 mm and an apparent density of from 0.15 to 0.70 g/cm 3 and said printed heat-shrinkable polystyrene-base film has a thickness of from 0.01 to 0.1 mm and said polyurethane base adhesive is applied in a thickness of from 1 to 10μm.
Claim 13
Dependent Claim
70 words
The heat-shrinkable polystyrene-base foamed composite sheet of claim 1 wherein said polystyrene-base foamed sheet has a heat-shrinkability of from 30 to 70% in a first direction and a heat-shrinkability of less than 20% in a second direction upon heating at 120° C. and said polystyrene-base film has a heat-shrinkability of 25% or more in one direction and from 5 to 25% in a second direction upon heating at 120° C.
Claim 14
Dependent Claim
67 words
The heat-shrinkable polystyrene-base foamed composite sheet of claim 1 wherein said heat-shrinkability of said polystyrene-base film has, in the same direction as the direction of the polystyrene-base foamed sheet to be laminated, a relationship at 120° C.:1.0<shrinkage of foamed sheet/shrinkage of film<1.5 in the first shrinkage direction of the foamed sheet, and 0.6<shrinkage of foamed sheet/shrinkage of film<2.0 in the second shrinkage direction of the foamed sheet.
Claim 15
Dependent Claim
34 words
A process for preparing a heat-shrinkable polystyrene-base foamed composite sheet comprising laminating a heat-shrinkable polyestyrene-base foamed sheet and a heat-shrinkable polystyrene-base film by applying a polyurethane-base adhesive between said foamed sheet and said film.
Claim 16
Dependent Claim
34 words
A process for preparing a heat-shrinkable polystyrene-base foamed composite sheet comprising laminating a heat-shrinkable polyestyrene-base foamed sheet and a heat-shrinkable polystyrene-base film by applying a polyurethane-base adhesive between said foamed sheet and said film.
Claim 17
Dependent Claim
12 words
The process of claim 12 wherein said heat-shrinkable polystyrene-base film is printed.
Claim 18
Dependent Claim
15 words
The process of claim 12 wherein subsequent to lamination, printing is applied to said composite.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-29 | 1994-04-30 | 1994-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-29 | 1998-04-30 | 1998-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-29 | 2002-04-30 | 2002-10-30 | $7700.00 | Window Closed / Lapsed |