US3847724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-blocking foamed polymeric laminate and method
Assignee: Graphic Packaging International LLC
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Filing: 1974-02-20
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Granted: 1974-11-12
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Expires: 1994-02-20
Abstract
Abstract A fire resistant, non-blocking low density laminated structure comprising a polymeric foam core which is sandwiched between two layers of coated paper. The paper is coated on both sides with aluminum foil with one of the outermost layers of aluminum foil being primed with a coating dissimilar from the coating on the outermost layer of aluminum foil so that whenever the laminated structure is stacked on top of another similarly laminated structure the dissimilar outer coatings on the laminate will prevent the laminate from adhering to each other. In the preferred embodiment the dissimilar outermost coatings may comprise a vinyl chloride/vinyl acetate coating on one side of the structure with a nitrocellulose coating contained on the other side of the structure. The selected dissimilar coatings give the desired non-blocking characteristics as well as providing improved scuff resistance to the structure which allows similar structures to be stacked on top of each other without sticking together and so as not to allow discoloration of the white surface due to scuffing against an otherwise raw aluminum surface. The outermost coatings may also be pigmented for purposes of enhancing the appearance of the structure. Also disclosed is a new and novel method of stacking the foamed laminate so that the laminate will not adhere to similar laminate stacked on top of each other.
Inventors
- 👤 T Powers
- 👤 S Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:52
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/30; B32B27/306; E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; B32B15/00; B32B15/04; B32B15/12; B32B7/00; B32B7/04; B32B7/12; B32B2250/00; B32B2250/40; B32B2327/00; B32B2327/06; B32B2331/00; B32B2331/04; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249985; Y10T428/249987; Y10T428/24999; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
156 words
A FIRE RESISTANT, NON-BLOCKING LOW DENSITY LAMINATED STRUCTURE COMPRISING A POLYMERIC FOAM CORE SANDWICHED BETWEEN TWO LAYERS OF COATED PAPER, EACH PAPER LAYER COMPRISING AN INNER LAYER OF METALLIC FOIL ADHESIVELY FIXED TO ONE SIDE OF THE PAPER AND AN OUTER LAYER OF METALLIC FOIL ADHESIVELY FIXED TO THE OTHER SIDE OF THE PAPER AND WITH THE INNERMOST LAYERS OF METALLIC FOIL BEING PRIMED WITH AN ADHESIVE COATING TO PROMOTE ADHESION TO THE POLYMERIC CORE, THE OUTERMOST SIDE OF ONE OUTER METALLIC FOIL BEING PRIMED WITH A COATING DISSIMILAR FROM THE OUTERMOST SIDE OF THE OTHER OUTER METALLIC FOIL, ONE OF THE OUTERMOST COATINGS COMPRISING A VINYL CHLORIDE/VINYL ACETATE COATING AND THE OTHER OF THE OUTERMOST COATINGS COMPRISING A NITROCELLULOSE COATING, THE DISSIMILAR OUTERMOST COATINGS FUNCTIONING TO ALLOW SIMILAR LAMINATED STRUCTURES TO BE STACKED ON TOP OF EACH OTHER SO THAT THE DISSIMILAR COATINGS ARE IN JUXTAPOSITION THEREBY PREVENTING THE STRUCTURES FROM ADHERING TO EACH OTHER.
Claim 2
Dependent Claim
156 words
A FIRE RESISTANT, NON-BLOCKING LOW DENSITY LAMINATED STRUCTURE COMPRISING A POLYMERIC FOAM CORE SANDWICHED BETWEEN TWO LAYERS OF COATED PAPER, EACH PAPER LAYER COMPRISING AN INNER LAYER OF METALLIC FOIL ADHESIVELY FIXED TO ONE SIDE OF THE PAPER AND AN OUTER LAYER OF METALLIC FOIL ADHESIVELY FIXED TO THE OTHER SIDE OF THE PAPER AND WITH THE INNERMOST LAYERS OF METALLIC FOIL BEING PRIMED WITH AN ADHESIVE COATING TO PROMOTE ADHESION TO THE POLYMERIC CORE, THE OUTERMOST SIDE OF ONE OUTER METALLIC FOIL BEING PRIMED WITH A COATING DISSIMILAR FROM THE OUTERMOST SIDE OF THE OTHER OUTER METALLIC FOIL, ONE OF THE OUTERMOST COATINGS COMPRISING A VINYL CHLORIDE/VINYL ACETATE COATING AND THE OTHER OF THE OUTERMOST COATINGS COMPRISING A NITROCELLULOSE COATING, THE DISSIMILAR OUTERMOST COATINGS FUNCTIONING TO ALLOW SIMILAR LAMINATED STRUCTURES TO BE STACKED ON TOP OF EACH OTHER SO THAT THE DISSIMILAR COATINGS ARE IN JUXTAPOSITION THEREBY PREVENTING THE STRUCTURES FROM ADHERING TO EACH OTHER.
Claim 3
Dependent Claim
16 words
The laminated structure as defined in claim 1 wherein the vinyl chloride/vinyl acetate coating is pigmented.
Claim 4
Dependent Claim
14 words
The laminated structure as defined in claim 1 wherein the nitrocellulose coating is pigmented.
Claim 5
Dependent Claim
20 words
The laminated structure as defined in claim 1 wherein the one outermost coating comprises a vinyl chloride/vinyl acetate copolymeR coating.
Claim 6
Dependent Claim
23 words
The laminated structure as defined in claim 1 wherein the one outermost coating comprises a physical mixture of polyvinyl chloride and polyvinyl acetate.
Claim 7
Dependent Claim
24 words
The laminated structure as defined in claim 1 wherein the one outermost coating comprises a mixture of the vinyl chloride and vinyl acetate compounds.
Claim 8
Independent Claim
127 words
A method of providing a non-blocking low density laminated structure, comprising the steps of: a. laminating a plurality of paper substrates on both sides to a layer of metallic foil with an adhesive; b. coating a portion of the laminated paper substrates on at least one side with a vinyl chloride/vinyl acetate coating; c. coating another portion of the laminated paper substrates on at least one side with a nitrocellulose coating; and d. forming a composite structure by laminating the vinyl chloride/vinyl acetate coated paper to one side of a polymeric foamed core and laminating the nitrocellulose coated paper to the other side of the foamed core, with both the vinyl chloride/vinyl acetate coating and the nitrocellulose coating being exposed on their respective sides of the structure.
Claim 9
Independent Claim
127 words
A method of providing a non-blocking low density laminated structure, comprising the steps of: a. laminating a plurality of paper substrates on both sides to a layer of metallic foil with an adhesive; b. coating a portion of the laminated paper substrates on at least one side with a vinyl chloride/vinyl acetate coating; c. coating another portion of the laminated paper substrates on at least one side with a nitrocellulose coating; and d. forming a composite structure by laminating the vinyl chloride/vinyl acetate coated paper to one side of a polymeric foamed core and laminating the nitrocellulose coated paper to the other side of the foamed core, with both the vinyl chloride/vinyl acetate coating and the nitrocellulose coating being exposed on their respective sides of the structure.
Claim 10
Dependent Claim
36 words
The method as defined in claim 7 further comprising the step of: e. stacking the composite structures on top of each other so that the vinyl chloride/vinyl acetate coating is in juxtaposition with the nitrocellulose coating.
Claim 11
Dependent Claim
20 words
The method as defined in claim 8 wherein the vinyl chloride/vinyl acetate coating is a thermosetting vinyl chloride/vinyl acetate copolymer.
Claim 12
Dependent Claim
23 words
The method as defined in claim 8 wherein the vinyl chloride/vinyl acetate coating is a physical mixture of polyvinyl chloride and polyvinyl acetate.
Claim 13
Dependent Claim
24 words
The method as defined in claim 8 wherein the vinyl chloride/vinyl acetate coating is a mixture of the vinyl chloride and vinyl acetate compounds.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |