US4435234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing high pressure decorative laminates containing an air-laid web
Assignee: Formica Corp
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Filing: 1982-04-05
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Granted: 1984-03-06
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Expires: 2002-04-05
Abstract
Abstract The invention relates to high pressure decorative laminates containing an air-laid web as a substrate and to a method of preparing such a decorative laminate from an assembly comprising said substrate and a thermosetting resin impregnated decor sheet.
Inventors
- 👤 James E. B. Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:31
CPC Classifications
D; D21; D21H; D21H27/00; D21H27/18; D21H27/22; D21H27/26; B; B32; B32B; B32B29/00; D21H11/00; D21H11/02; D21H11/04; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; D21H27/30; D21H5/00; D21H5/0085; D21H5/0087; D21H5/26; D21H5/2607; D21H5/2628; D21H5/2635
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
153 words
A method of producing a heat and pressure consolidated, high pressure decorative laminate which comprises, (1) defibrating cellulosic fibers to produce fibers of an average length of about 0.5 to 2.5 mm in the presence of air to thereby form an air-fiber stream, (2) incorporating into said air-fiber stream from about 20%-35% of particles of a thermosetting resin to thereby form an air-fiber-resin stream, (3) depositing the fibers and resin from said air-fiber-resin stream, under conditions of 40-80% relative humidity, onto a foraminous belt at a thickness ranging from about 5-100 mm to form a layer of uniform composition and basis weight, (4) pre-consolidating the deposited fibers and resin to a thickness of from about 0.5-10.0 mm, (5) forming a laminate assembly comprising, in superimposed relationship, (A) a monostichous layer of said preconsolidated fibers and resin and (B) a thermosetting resin impregnated decorative sheet, and (6) heat and pressure consolidating said laminate assembly.
Claim 2
Independent Claim
153 words
A method of producing a heat and pressure consolidated, high pressure decorative laminate which comprises, (1) defibrating cellulosic fibers to produce fibers of an average length of about 0.5 to 2.5 mm in the presence of air to thereby form an air-fiber stream, (2) incorporating into said air-fiber stream from about 20%-35% of particles of a thermosetting resin to thereby form an air-fiber-resin stream, (3) depositing the fibers and resin from said air-fiber-resin stream, under conditions of 40-80% relative humidity, onto a foraminous belt at a thickness ranging from about 5-100 mm to form a layer of uniform composition and basis weight, (4) pre-consolidating the deposited fibers and resin to a thickness of from about 0.5-10.0 mm, (5) forming a laminate assembly comprising, in superimposed relationship, (A) a monostichous layer of said preconsolidated fibers and resin and (B) a thermosetting resin impregnated decorative sheet, and (6) heat and pressure consolidating said laminate assembly.
Claim 3
Dependent Claim
19 words
A method in accordance with claim 1 wherein said thermosetting resin in said air-fiber-resin stream is a phenolic resin.
Claim 4
Dependent Claim
23 words
A method in accordance with claim 1 wherein said laminate assembly contains, atop said (B), (C) a thermosetting resin impregnated, a-cellulose, overlay sheet.
References Cited (Backward Citations)
US4379194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |