US4416950A
Expired / Lapsed
US
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Transparent fibrous sheets
Assignee: Andrews Paper and Chemical Co Inc
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Filing: 1982-04-29
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Granted: 1983-11-22
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Expires: 2002-04-29
Abstract
Abstract Fibrous sheets are transparentized by coating them with monomers of the formula: ##STR1## wherein R is hydrogen or lower alkyl and n is an integer of 0 to 6; and polymerizing the monomers.
Inventors
- 👤 Peter Muller
- 👤 Henry Mustacchi
- 👤 Leonard Kreicas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:07
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/16; C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/26; C08F20/30; D21H17/00; D21H17/03; D21H17/05; D21H17/18; D21H17/19; D21H21/00; D21H21/14; D21H21/26; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31906; Y10T428/31935; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
46 words
A transparent, non-stratified, water and alcohol resistant, resin reinforced cellulosic fibrous sheet having as the resin component, polymerized monomer of the formula: ##STR4## wherein R is selected from the group consisting of hydrogen and lower alkyl and n is an integer of from 0 to 6.
Claim 2
Dependent Claim
46 words
A transparent, non-stratified, water and alcohol resistant, resin reinforced cellulosic fibrous sheet having as the resin component, polymerized monomer of the formula: ##STR4## wherein R is selected from the group consisting of hydrogen and lower alkyl and n is an integer of from 0 to 6.
Claim 3
Dependent Claim
9 words
The sheet of claim 1 wherein n is 1.
Claim 4
Dependent Claim
9 words
The sheet of claim 2 wherein R is hydrogen.
Claim 5
Dependent Claim
9 words
The sheet of claim 2 wherein R is methyl.
Claim 6
Dependent Claim
65 words
A transparent, non-stratified, water and alcohol resistant, resin reinforced cellulosic fibrous sheet having polymerized resin components, polymerized from a mixture of monomers of the formula: ##STR5## wherein R is selected from the group consisting of hydrogen and lower alkyl and n is an integer of from 0 to 6; and ##STR6## wherein R 1 is selected from the group consisting of hydrogen and lower alkyl.
Claim 7
Dependent Claim
65 words
A transparent, non-stratified, water and alcohol resistant, resin reinforced cellulosic fibrous sheet having polymerized resin components, polymerized from a mixture of monomers of the formula: ##STR5## wherein R is selected from the group consisting of hydrogen and lower alkyl and n is an integer of from 0 to 6; and ##STR6## wherein R 1 is selected from the group consisting of hydrogen and lower alkyl.
Claim 8
Dependent Claim
58 words
A transparent, non-stratified, water and alcohol resistant, resin reinforced cellulosic fibrous sheet having as the resin component, polymerized monomer of the formula: ##STR7## wherein R is selected from the group consisting of hydrogen and lower alkyl and n is an integer of from 0 to 6; in combination with polystyrenes, polybutenes and hydrogenated hydrocarbon resins or their mixtures.
Claim 9
Dependent Claim
58 words
A transparent, non-stratified, water and alcohol resistant, resin reinforced cellulosic fibrous sheet having as the resin component, polymerized monomer of the formula: ##STR7## wherein R is selected from the group consisting of hydrogen and lower alkyl and n is an integer of from 0 to 6; in combination with polystyrenes, polybutenes and hydrogenated hydrocarbon resins or their mixtures.
Claim 10
Independent Claim
123 words
The method of transparentizing fibrous sheets, which comprises; providing a sheet of fibrous material for transparentizing and which comprises a plurality of discrete fibers which are disposed so that at least a portion of said fibers are bonded together at cross-over points, forming voids between the fibers at non-crossover points; applying to a surface of the sheet a monomer of the formula: ##STR8## wherein R is selected from the group consisting of hydrogen and lower alkyl, and n is an integer of a 0 to 6; in admixture with a polymerization catalyst; evenly distributing the applied mixture of monomer and catalyst so as to fill voids in the sheet with the mixture of monomer and catalyst; and polymerizing the monomer in the voids.
Claim 11
Independent Claim
123 words
The method of transparentizing fibrous sheets, which comprises; providing a sheet of fibrous material for transparentizing and which comprises a plurality of discrete fibers which are disposed so that at least a portion of said fibers are bonded together at cross-over points, forming voids between the fibers at non-crossover points; applying to a surface of the sheet a monomer of the formula: ##STR8## wherein R is selected from the group consisting of hydrogen and lower alkyl, and n is an integer of a 0 to 6; in admixture with a polymerization catalyst; evenly distributing the applied mixture of monomer and catalyst so as to fill voids in the sheet with the mixture of monomer and catalyst; and polymerizing the monomer in the voids.
Claim 12
Dependent Claim
12 words
The method of claim 7 wherein said sheet is a rag paper.
Claim 13
Dependent Claim
17 words
The method of claim 7 wherein said sheet is a paper made from chemically purified wood pulp.
Claim 14
Dependent Claim
16 words
The method of claim 7 wherein said sheet is a paper with internal and surface sizing.
Claim 15
Dependent Claim
9 words
The method of claim 7 wherein n is 1.
Claim 16
Dependent Claim
9 words
The method of claim 11 wherein R is hydrogen.
Claim 17
Dependent Claim
9 words
The method of claim 11 wherein R is methyl.
Claim 18
Dependent Claim
18 words
The method of claim 7 wherein polymerization is carried out by heating and a thermopolymerization catayst is used.
Claim 19
Dependent Claim
16 words
The method of claim 7 wherein polymerization is photopolymerization and the catalyst is a photopolymerization catalyst.
Claim 20
Dependent Claim
19 words
The method of claim 7 wherein distributing is by wet-packing the applied to sheet in a roll under tension.
Claim 21
Dependent Claim
18 words
The method of claim 16 wherein the wet packed roll is maintained for 24 hours prior to thermopolymerization.
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) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |