US4557969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet-like packing material of melamine or phenol resin fibers
Assignee: BASF SE
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Filing: 1984-11-19
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Granted: 1985-12-10
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Expires: 2004-11-19
Abstract
Abstract A sheet-like packing material consisting of A. from 2 to 90% by weight of melamine resin or phenol resin fibers and/or fibrids, B. from 5 to 90% by weight of finely divided inorganic fillers, preferably cement, and C. from 2 to 40% by weight of organic binders, preferably rubber, with or without D. from 0.1 to 50% by weight of thermoplastic fibrids, the percentages summing to 100, possesses low gas permeability, high compressive creep strength and advantageous compressibility, resilience and swelling behavior.
Inventors
- 👤 Heinz Berbner
- 👤 Bernhard Seid
- 👤 Heinz Voelker
- 👤 Hans D. Zettler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:00
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/102; C; C09; C09K; C09K3/00; C09K3/10; C09K3/1025; C09K3/1028; C09K2200/00; C09K2200/02; C09K2200/0243; C09K2200/06; C09K2200/0607; C09K2200/0692; C09K2200/0695; Y; Y10; Y10T; Y10T442/00; Y10T442/60; Y10T442/696; Y10T442/697
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
A sheet-like packing material which consists of A. from 2 to 90% by weight of plastic fibers and/or plastic fibrids, B. from 5 to 90% by weight of finely divided inorganic fillers, C. from 2 to 40% by weight of organic binders and D. from 0.1 to 50% by weight of thermoplastic fibrids, the percentages summing to 100 and which has (a) a gas permeability according to DIN 3535 of less than 1.0 cm 3 /min, (b) a compressive creep strength according to DIN 52,913 which is greater than 10N/mm 2 , (c) a compressibility according to ASTM F36 of from 3 to 25%, (d) a resilience according to ASTM F36 of from 30 to 80% and (e) swelling according to ASTM F146 of less than 15%, wherein the plastic fibers or plastic fibrids consist of a melamine resin or of a phenol resin.
Claim 2
Dependent Claim
144 words
A sheet-like packing material which consists of A. from 2 to 90% by weight of plastic fibers and/or plastic fibrids, B. from 5 to 90% by weight of finely divided inorganic fillers, C. from 2 to 40% by weight of organic binders and D. from 0.1 to 50% by weight of thermoplastic fibrids, the percentages summing to 100 and which has (a) a gas permeability according to DIN 3535 of less than 1.0 cm 3 /min, (b) a compressive creep strength according to DIN 52,913 which is greater than 10N/mm 2 , (c) a compressibility according to ASTM F36 of from 3 to 25%, (d) a resilience according to ASTM F36 of from 30 to 80% and (e) swelling according to ASTM F146 of less than 15%, wherein the plastic fibers or plastic fibrids consist of a melamine resin or of a phenol resin.
Claim 3
Dependent Claim
38 words
A packing material as claimed in claim 1, which contains from 0.1 to 50% by weight of fibrids D consisting of a thermoplastic polymer, in particular polyvinyl chloride, polystyrene, polyethylene, polypropylene, nylon, a polyamideimide, a polyester or polyacrylonitrile.
Claim 4
Dependent Claim
32 words
A packing material as claimed in claim 1, which contains melamine resin fibers or phenol resin fibers having a BET specific surface area of less than 2 m 2 .g -1 .
Claim 5
Dependent Claim
33 words
A packing material as claimed in claim 1, which contains melamine resin fibrids or phenol resin fibrids having a BET specific surface area of not less than 5 m 2 .g -1 .
Claim 6
Dependent Claim
62 words
A process for the production of a packing material as claimed in claim 1, wherein the components A, B and, if required, D, in the form of solids, and component C, as an aqueous dispersion, are stirred with water, the major part of the water is separated off mechanically, and the material is pressed, and heated at from 120° to 250° C.
Claim 7
Dependent Claim
71 words
A process for the production of a packing material as claimed in claim 1, wherein the components A, B and, if required, D, are mixed on a roll mill or in a kneader, together with a solution of the component C, the mixture is rolled on a calender to give a film, the solvent being evaporated, and the material is brought to the desired thickness by combining a plurality of films.
References Cited (Backward Citations)
GB1452629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |