Patent US1184972A successfully refreshed from Google Patents.
US3928099A
Expired / Lapsed
US
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Process of producing pressure sensitive recording sheets
Assignee: Yupo Corp
•
Filing: 1973-04-30
•
Granted: 1975-12-23
•
Expires: 1993-04-30
Abstract
Abstract A process for making a self-contained pressure-sensitive recording sheet. A colored thermoplastic resin substrate having adhered thereto a styrene polymer layer having dispersed therein fine particles of a temporarily deformed rubbery polymer is contacted with a swelling (softening) agent for the styrene polymer layer which permits the deformed rubbery polymer particles to return to their original shape. At least the surface of the styrene polymer layer is rendered opaque. In one embodiment, the swelling agent contains an additional liquid component which increases the crushability of the styrene polymer layer, whereby superior recording is achievable. In another embodiment, the styrene polymer layer having the fine particles of rubbery polymer dispersed therein contains an additional resin component which renders the layer more easily crushable. The additional liquid component and resin component must meet certain criteria as described in the specification.
Inventors
- 👤 Hiro Ohotsubo
- 👤 Suguru Fujikura
- 👤 Yoshimitsu Miyata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:09
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B27/30; B32B27/302; B41; B41M; B41M5/00; B41M5/124; B32B2264/00; B32B2264/02; B32B2264/0207; B32B2307/00; B32B2307/40; B32B2307/402; B32B2307/41; B32B2307/50; B32B2307/514; B32B2307/516; B32B2307/518; B32B2429/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249986
Claims Analysis
Total Claims: 105
Claim 1
Independent Claim
409 words
In a process for manufacturing an autogeneous self-marking pressure sensitive recording sheet comprising the thermoplastic, colored resin substrate having adhered thereto a surface layer of a different color from the substrate, which surface layer exhibits a writing surface comprising a plurality of microvoids, comprising the steps of: contacting the surface layer, the surface layer comprising a polymer of styrene and uniformly dispersed fine particles of rubbery polymer, the surface layer being at least uniaxially stretched to deform the fine particles of rubbery polymer, the fine particles of rubbery polymer being retained in the deformed state in the styrene polymer film, with a swelling agent for the polymer of styrene for a period of time and at a temperature sufficient to swell at least the surface of the surface layer, whereby the fine particles of rubbery polymer which were deformed by the stretching are no longer retained in the deformed state because the swelling softens the styrene polymer and releases the retaining force on the fine particles, which, due to their rubbery nature, return to their original nondeformed shape and create microvoids in the surface layer, rendering the surface layer opaque, the improvement wherein: the swelling agent contains a component soluble therein which does not dissolve the polymer of styrene at 45*C and which meets the formula To - T>3 seconds. where To time in seconds for a test surface layer treated in n-heptane to reach a whiteness value (Lvalue) of 83 + or - 2% and T time in seconds for the same test surface layer treated in n-heptane with 2-10% of the component to reach a surface whiteness (L value) of 83 + or - 2%; the test surface layer used to determine compliance with the formula consisting of 94% by weight polymer of styrene component and 6% by weight of polybutadiene component, having fine particles of a size of 0.1 to 10 Mu uniformly dispersed therein, the test surface layer having a melt index of 2.2g/10 min., 18 - 19 wt% of insolubles in toluene and the polymer of styrene component having an ( eta )toluene30 0.8, the test surface layer being laminated to a substrate of the same composition but containing 1% Phthalocyanine Blue, the laminate being simultaneously biaxially stretched at 128*C 4X in the longitudinal and width directions, whereby the test surface layer and substrate thicknesses after stretching are 12 xi and 23 xi , respectively; whereby the crushability of the surface layer is increased.
Claim 2
Dependent Claim
409 words
In a process for manufacturing an autogeneous self-marking pressure sensitive recording sheet comprising the thermoplastic, colored resin substrate having adhered thereto a surface layer of a different color from the substrate, which surface layer exhibits a writing surface comprising a plurality of microvoids, comprising the steps of: contacting the surface layer, the surface layer comprising a polymer of styrene and uniformly dispersed fine particles of rubbery polymer, the surface layer being at least uniaxially stretched to deform the fine particles of rubbery polymer, the fine particles of rubbery polymer being retained in the deformed state in the styrene polymer film, with a swelling agent for the polymer of styrene for a period of time and at a temperature sufficient to swell at least the surface of the surface layer, whereby the fine particles of rubbery polymer which were deformed by the stretching are no longer retained in the deformed state because the swelling softens the styrene polymer and releases the retaining force on the fine particles, which, due to their rubbery nature, return to their original nondeformed shape and create microvoids in the surface layer, rendering the surface layer opaque, the improvement wherein: the swelling agent contains a component soluble therein which does not dissolve the polymer of styrene at 45*C and which meets the formula To - T>3 seconds. where To time in seconds for a test surface layer treated in n-heptane to reach a whiteness value (Lvalue) of 83 + or - 2% and T time in seconds for the same test surface layer treated in n-heptane with 2-10% of the component to reach a surface whiteness (L value) of 83 + or - 2%; the test surface layer used to determine compliance with the formula consisting of 94% by weight polymer of styrene component and 6% by weight of polybutadiene component, having fine particles of a size of 0.1 to 10 Mu uniformly dispersed therein, the test surface layer having a melt index of 2.2g/10 min., 18 - 19 wt% of insolubles in toluene and the polymer of styrene component having an ( eta )toluene30 0.8, the test surface layer being laminated to a substrate of the same composition but containing 1% Phthalocyanine Blue, the laminate being simultaneously biaxially stretched at 128*C 4X in the longitudinal and width directions, whereby the test surface layer and substrate thicknesses after stretching are 12 xi and 23 xi , respectively; whereby the crushability of the surface layer is increased.
Claim 3
Dependent Claim
41 words
The process of claim 1 where the component is an organic liquid or solid soluble in the swelling agent and present in an amount of from about 0.5 to about 50% by weight based on the weight of swelling agent used.
Claim 4
Dependent Claim
18 words
The process of claim 2 where the component is an alcohol, fatty acid, ester or compatible mixture thereof.
Claim 5
Dependent Claim
135 words
The process of claim 3 where the component is: an alcohol of the formula R - OH where R is a C2 - C18 aliphatic hydrocarbon group; an ether alcohol of the formula R1-O-(R2O)nH where R1 is a C8 -C18 aliphatic hydrocarbon group, R2 is a C2 - C3 divalent aliphatic hydrocarbon group and n is an integer of 1 - 7; a fatty acid of the formula R3-CO-OH where R3 is a C1 - C17 hydrocarbon group; an ester of the formula R4-CO-O-R5 where R4 is a C1 - C17 aliphatic hydrocarbon group and R5 is a C1 - C18 aliphatic hydrocarbon group; an ester of the formula R6-O-OC-R7-CO-R8 where R6 and R8 are C2 - C18 aliphatic hydrocarbon groups and R7 is a C6- C16 divalent hydrocarbon group; or a compatible mixture thereof.
Claim 6
Dependent Claim
34 words
The process of claim 1 wherein more than 50%, by total particle number, of ssaid fine particles of a rubbery polymer have an average particle diameter of from about 0.1 to about 10 microns.
Claim 7
Dependent Claim
22 words
The process of claim 5 wherein the surface layer, has a melt flow rate of about 0.1 to about 3 g/10 min.(ASTM-D1238).
Claim 8
Dependent Claim
25 words
The process of claim 6 wherein the rubbery polymer is from about 1 to about 15% by weight of the weight of the styrene polymer.
Claim 9
Dependent Claim
19 words
The process of claim 7 wherein the rubbery polymer has a Mooney viscosity of about 20 to about 150.
Claim 10
Dependent Claim
41 words
The process of claim 8 wherein the polymer of styrene has a molecular weight, wieght average, of about 150,000 to about 400, 000, a Vicat softening point (ASTM D-1525) of 80*-110*C and a Rockwell hardness (ASTM D-785) of 80 - 100.
Claim 11
Dependent Claim
16 words
The process of claim 9 where the stretching ratio ranges from about 6 to about 40.
Claim 12
Dependent Claim
41 words
The process of claim 10 wherein the stretching temperature of said at least uniaxial stretching is higher than the secondary transition point of at least the surface layer and is lower than the flow temperature of at least the surface layer.
Claim 13
Dependent Claim
55 words
The process of claim 11 where both the surface layer and the substrate are stretched, and the lower limit of the stretching temperature is the highest temperature of the secondary transition temperature of the surface layer or substrate and upper limit is the lowest temperature of the flow temperature of the surface layer or substrate.
Claim 14
Dependent Claim
12 words
The process of claim 12 wherein the stretching is a biaxial stretching.
Claim 15
Dependent Claim
49 words
The process of claim 11 wherein the contact with the swelling agent is at a temperature higher than about 35*C but below the temperature at which the laminate film is deformed so that it cannot be used as a synthetic paper or below the boiling temperature of the agent.
Claim 16
Dependent Claim
32 words
The process of claim 14 wherein the contact of the swelling agent is at a temperature for a time sufficient to provide an L value of from about 60% to about 98%.
Claim 17
Dependent Claim
15 words
The process of claim 9 wherein the polymer of styrene is a homopolymer of styrene.
Claim 18
Dependent Claim
37 words
The process of claim 9 where the polymer of styrene is a copolymer of styrene with a monomer copolymerizable therewith, the monomer being present in an amount less than 50 mole percent of the copolymer of styrene.
Claim 19
Dependent Claim
23 words
The process of claim 1 wherein a resin backing layer is applied to the substrate on the side surface opposite the surface layer.
Claim 20
Dependent Claim
16 words
The process of claim 1 where only the surface layer is contacted with the swelling composition.
Claim 21
Dependent Claim
20 words
The process of claim 18 where both the surface layer and resin backing layer are contacted with the swelling composition.
Claim 22
Dependent Claim
45 words
The process of claim 20 where, after contact with the swelling composition, the resin backing layer is coated with a thin resin layer of a resin or a resin containing filler wherein the coating has a coated film hardness of 10 tO 30 (JIS K-5400).
Claim 23
Dependent Claim
22 words
The process of claim 21 where the resin-filler coating has a coated film hardness of about 15 to about 25 (JIS K-5400).
Claim 24
Dependent Claim
26 words
The process of claim 22 wherein the resin filler coating comprises from 100 to 15% by weight of resin based on weight of resin plus filler.
Claim 25
Dependent Claim
61 words
The process of claim 23 wherein the resin filler coating comprises a resin which is an adhesive or a thermosetting resin, which termosetting resin hardens at about 50* to about 80*C, and which adhesive resin is selected from the group consisting of nitrile copolymers of olefinic unsaturated acids, methyl methacrylic acid-acrylonitrile copolymers, methyl methacrylic acid-methacrylonitrile copolymers and acrylic acid ester copolymers.
Claim 26
Dependent Claim
34 words
The process of claim 24 where the resin in the resin-filler coating is a nitrile copolymer of an olefinic unsaturated acid, an urea-formaldehyde condensate, a melamine-formaldehyde condensate - or an acrylic acid ester copolymer.
Claim 27
Dependent Claim
20 words
The process of claim 1 where the color difference between the surface layer and substrate is at least 3.0 (NBS).
Claim 28
Dependent Claim
48 words
The process of claim 1 wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; and colored thermoplastic resin substrate.
Claim 29
Dependent Claim
53 words
The process of claim 1 wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; and a resin layer without microvoids.
Claim 30
Dependent Claim
67 words
The process of claim 1 wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; and resin coating or resin containing filler-coating having a coated film hardness of about 10 to about 30 (JIS K-5400).
Claim 31
Dependent Claim
73 words
The process of claim 1 wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; a resin layer without microvoids; and resin coating or resing containing filler coating having a coated film hardness of about 10 to about 30 (JIS K-5400).
Claim 32
Dependent Claim
79 words
The process of claim 1 wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; a resin layer which exhibits a surface comprising a plurality of microvoids; and resin coating or resin containing filler coating having a coated film hardness of about 10 to 30 (JIS K-5400).
Claim 33
Dependent Claim
60 words
The process of claim 1 wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequency thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; and a resin layer which exhibits a surface comprising a plurality of microvoids.
Claim 34
Dependent Claim
11 words
The process of claim 3 wherein the component is ether alcohol.
Claim 35
Dependent Claim
275 words
In the process of claim 1, wherein the improvement is further comprised in that the surface layer further contains a resin, in an amount of less tHan 15% by weight based on the weight of the surface layer, different from the fine particles of rubbery polymer which is softer than the polymer of styrene and which has a lower softening point than the polymer of styrene and which satisfies the following formula: To - T>3 seconds: wherein To time in seconds for a test surface layer treated in n-heptane at 45*C to reach a whiteness value (L value) of 83 + or - 2%; and T time in seconds for the same test surface layer but containing 5% of the resin, based on surface layer weight, treated in n-heptane at 45*C to reach a whiteness value (L value) of 83 + or - 2%; the test surface layer used to determine compliance with the formula consisting of 94% by weight polymer of styrene component and 6% by weight of polybutadiene component, having fine particles of a size of 0.1 to 10 Mu uniformly dispersed therein, and having a melt index of 2.2g/10 min., 18 - 19 wt% of insolubles in toluene and the polymer of styrene component having an ( eta )toluene 30 0.8, the test surface layer being laminated to a substrate of the same composition but containing 1% Phthalocyanine Blue: the laminate being simultaneously biaxially stretched at 128*C 4 X in the longitudinal and width directions, whereby the test surface layer and substrate thicknesses after stretching are 12 Mu and 23 Mu , respectively; whereby the crushability of the surface layer is increased.
Claim 36
Dependent Claim
30 words
The process of claim 34, wherein the resin has a Shore hardness of less than 90* (JIS K 6301) and a Vacat softening point of less than 60*C (ASTM D-785).
Claim 37
Dependent Claim
26 words
The process of claim 35, wherein the resin is selected from the group consisting of polyethylene oxide, olefin-polar vinyl monomer copolymers, polyisobutylene or a petroleum resin.
Claim 38
Dependent Claim
41 words
The process of claim 34, where the component is an organic liquid or solid soluble in the swelling agent and present in an amount of from about 0.5 to about 50% by weight based on the weight of swelling agent used.
Claim 39
Dependent Claim
18 words
The process of claim 37, where the component is an alcohol, fatty acid, ester or compatible mixture thereof.
Claim 40
Dependent Claim
117 words
The process of claim 38, where the component is: an alcohol of the formula R-OH where R is a C2-C18 aliphatic hydrocarbon group; an ether alcohol of the formula R1-O-(R2O)nH where R1 is a C8-C18 aliphatic hydrocarbon group, R2 is a C2-C3 divalent aliphatic hydrocarbon group and n is an integer of 1-7; a fatty acid of the formula R3-CO-OH where R3 is a C1-C17 hydrocarbon group; an ester of the formula R4-CO-O-R5 where R4 is a C1-C17 aliphatic hydrocarbon group and R5 is a C1-C18 aliphatic hydrocarbon group; an ester of the formula R6-O-OC-R7-CO-R8 where R6 and R8 are C2-C18 aliphatic hydrocarbon groups and R7 is a C6-C16 divalent hydrocarbon group; or a compatible mixture thereof.
Claim 41
Dependent Claim
34 words
The process of claim 34, wherein more than 50%, by total particle number, of said fine particles of a rubbery polymer have an average particle diamter of from about 0.1 to about 10 microns.
Claim 42
Dependent Claim
23 words
The process of claim 40, wherein the surface layer has a melt flow rate of about 0.1 to about 3 g/10 min. (ASTM-D1238).
Claim 43
Dependent Claim
22 words
The process of claim 41, wherein the rubbery polymer is from about 15% by weight of the weight of the styrene polymer.
Claim 44
Dependent Claim
19 words
The process of claim 42, wherein the rubbery polymer has a Mooney viscosity of about 20 to about 150.
Claim 45
Dependent Claim
38 words
The process of claim 43, wherein the polymer of styrene has a molecular weight, weight average, of about 150,000 to about 400,000, a Vicat softening point (ASTM D-1525) of 80*-110*C and a Rockwell hardness (ASTM D-785) of 80-100.
Claim 46
Dependent Claim
16 words
The process of claim 44, where the stretching ratio ranges from about 6 to about 40.
Claim 47
Dependent Claim
41 words
The process of claim 45, wherein the stretching temperature of said at least uniaxial stretching is higher than the secondary transition point of at least the surface layer and is lower than the flow temperature of at least the surface layer.
Claim 48
Dependent Claim
55 words
The process of claim 46, where both the surface layer and the substrate are stretched and the lower limit of the stretching temperature is the highest temperature of the secondary transition temperature of the surface layer or substrate and upper limit is the lowest temperature of the flow temperature of the surface layer or substrate.
Claim 49
Dependent Claim
12 words
The process of claim 47, wherein the stretching is a biaxial stretching.
Claim 50
Dependent Claim
49 words
The process of claim 46, wherein the contact with the swelling agent is at a temperature higher than about 35*C but below the temperature at which the laminate film is deformed so that it cannot be used as a synthetic paper or below the boiling temperature of the agent.
Claim 51
Dependent Claim
32 words
The process of claim 49, wherein the contact of the swelling agent is at a temperature for a time sufficient to provide an L value of from about 60% to about 98%.
Claim 52
Dependent Claim
15 words
The process of claim 44, where the polymer of styrene is a homopolymer of styrene.
Claim 53
Dependent Claim
37 words
The process of claim 44, where the polymer of styrene is a copolymer of styrene with a monomer copolymerizable therewith, the monomer being present in an amount less than 50 mol percent of the copolymer of styrene.
Claim 54
Dependent Claim
25 words
The process of claim 36, where the polar vinyl monomer comprises about 12 to about 40% by weight of the copolymer, based on olefin weight.
Claim 55
Dependent Claim
22 words
The process of claim 34, where a resin backing layer is applied to the substrate on the side opposite the surface layer.
Claim 56
Dependent Claim
16 words
The process of claim 34, where only the surface layer is contacted with the swelling composition.
Claim 57
Dependent Claim
20 words
The process of claim 54, where both the surface layer and resin backing layer are contacted with the swelling composition.
Claim 58
Dependent Claim
45 words
The process of claim 56, where, after contact with the swelling composition, the resin backing layer is coated with a thin resin layer of a resin or resin containing filler wherein the coating has a coated film hardness of about 10 to 30 (JIS K-5400).
Claim 59
Dependent Claim
22 words
The process of claim 57, where the resin-filler coating has a coated film hardness of about 15 to about 25 (JIS K-5400).
Claim 60
Dependent Claim
26 words
The process of claim 58, wherein the resin filler coating comprises from 100 to 15% by weight of resin based on weight of resin plus filler.
Claim 61
Dependent Claim
61 words
The process of claim 59, where the resin filler coating comprises a resin which is an adhesive or a thermosetting resin, which thermosetting resin hardens at about 50* to about 80*C, and which adhesive resin is selected from the group consisting of nitrile copolymers of olefinic unsaturated acids, methyl methacrylic acid-acrylonitrile copolymers, methyl methacrylic acid-methacrylonitrile copolymers and acrylic acid ester copolymers.
Claim 62
Dependent Claim
35 words
The process of claim 60, where the resin in the resin filler coating is a nitrile copolymer of an olefinic unsaturated acid, an urea-formaldehyde condensate, a melamine-formaldehyde condensate - or an acrylic acid ester copolymer.
Claim 63
Dependent Claim
20 words
The process of claim 34, where the color difference between the surface layer and substrate is at least 3.0 (NBS).
Claim 64
Dependent Claim
48 words
The process of claim 34, wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder; surface layer exhibiting a surface comprising a plurality of microvoids; and colored thermoplastic resin substrate.
Claim 65
Dependent Claim
53 words
The process of claim 34, wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; and a resin layer without microvoids.
Claim 66
Dependent Claim
67 words
The process of claim 34, wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; and resin or resin containing filler coating having a coated film hardness of about 10 to about 30 (JIS K-5400).
Claim 67
Dependent Claim
72 words
The process of claim 34, wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; a resin layer without microvoids, and resin or resin containing filler coating having a coated film hardness of about 10 to about 30 (JIS K-5400).
Claim 68
Dependent Claim
79 words
The process of claim 34, wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; a resin layer which exhibits a surface comprising a plurality of microvoids; and resin or resin containing filler coating having a coated film hardness of about 10 to about 30 (JIS K-5400).
Claim 69
Dependent Claim
60 words
The process of claim 34, wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; and a resin layer which exhibits a surface comprising a plurality of microvoids.
Claim 70
Dependent Claim
11 words
The process of claim 38 wherein the component is ether alcohol.
Claim 71
Dependent Claim
14 words
IN A PROCESS FOR MANUFACTURING A AUTOGENEOUS SELF-MARKING PERSSURE SENSITIVE RECORDING SHEETA AUTOGENEOUS SELF-MARK-
Claim 72
Dependent Claim
14 words
IN A PROCESS FOR MANUFACTURING A AUTOGENEOUS SELF-MARKING PERSSURE SENSITIVE RECORDING SHEETA AUTOGENEOUS SELF-MARK-
Claim 73
Dependent Claim
30 words
The process of claim 70 wherein the resin has a Shore hardness of less than 90* (JIS K 6301) and a Vicat softening point of less than 60*C (ASTM D-785).
Claim 74
Dependent Claim
26 words
The process of claim 71, wherein the resin is selected from the group consisting of polyethylene oxide, olefin-polar vinyl monomer copolymers, polyisobutylene or a petroleum resin.
Claim 75
Dependent Claim
26 words
The process of claim 72 where the olefin - polar vinyl monomer copolymer is an olefin - acrylic acid copolymer or an olefin vinyl ester copolymer.
Claim 76
Dependent Claim
25 words
The process of claim 72 where the polar vinyl monomer comprises about 12 to about 40% by weight of the copolymer, based on olefin weight.
Claim 77
Dependent Claim
34 words
The process of claim 70, wherein more than 50%, by total particle number, of said fine particles of a rubbery polymer have an average particle diameter of from about 0.1 to about 10 microns.
Claim 78
Dependent Claim
23 words
The process of claim 75, wherein the surface layer has a melt flow rate of about 0.1 to about 3 g/10 min. (ASTM-D1238).
Claim 79
Dependent Claim
22 words
The process of claim 76, wherein the rubbery polymer is from about 15% by weight of the weight of the styrene polymer.
Claim 80
Dependent Claim
19 words
The process of claim 77, wherein the rubbery polymer has a Mooney viscosity of about 20 to about 150.
Claim 81
Dependent Claim
38 words
The process of claim 78, wherein the polymer of styrene has a molecular weight, weight average, of about 150,000 to about 400,000, a Vicat softening point (ASTM D-1525) of 80*-110*C and a Rockwell hardness (ASTM D-785) of 80-100.
Claim 82
Dependent Claim
16 words
The process of claim 79 where the stretching ratio ranges from about 6 to about 40.
Claim 83
Dependent Claim
41 words
The process of claim 80, wherein the stretching temperature of said at least uniaxial stretching is higher than the secondary transition point of at least the surface layer and is lower than the flow temperature of at least the surface layer.
Claim 84
Dependent Claim
55 words
The process of claim 81, where both the surface layer and the substrate are stretched, and the lower limit of the stretching temperature is the highest temperature of the secondary transition temperature of the surface layer or substrate and upper limit is the lowest temperature of the flow temperature of the surface layer or substrate.
Claim 85
Dependent Claim
12 words
The process of claim 82, wherein the stretching is a biaxial stretching.
Claim 86
Dependent Claim
49 words
The process of claim 81, wherein the contact with the swelling agent is at a temperature higher than about 35*C but below the temperature at which the laminate film is deFormed so that it cannot be used as a synthetic paper or below the boiling temperature of the agent.
Claim 87
Dependent Claim
32 words
The process of claim 84, wherein the contact of the swelling agent is at a temperature for a time sufficient to provide an L value of from about 60% to about 98%.
Claim 88
Dependent Claim
15 words
The process of claim 79, where the polymer of styrene is a homopolymer of styrene.
Claim 89
Dependent Claim
37 words
The process of claim 79, where the polymer of styrene is a copolymer of styrene with a monomer copolymerizable therewith, the monomer being present in an amount less than 50 mol percent of the copolymer of styrene.
Claim 90
Dependent Claim
22 words
The process of claim 36, where the olefin-polar vinyl monomer copolymer is an olefin-acrylic acid copolymer or an olefin vinyl ester copolymer.
Claim 91
Dependent Claim
22 words
The process of claim 70 where a resin backing layer is applied to the substrate on the side opposite the surface layer.
Claim 92
Dependent Claim
16 words
The process of claim 70, where only the surface layer is contacted with the swelling composition.
Claim 93
Dependent Claim
20 words
The process of claim 89, where both the surface layer and resin backing layer are contacted with the swelling composition.
Claim 94
Dependent Claim
45 words
The process of claim 91 where, after contact with the swelling composition, the resin backing layer is coated with a thin resin layer of a resin or resin containing filler wherein the coating has a coated film hardness of about 10 to 30 (JIS K-5400).
Claim 95
Dependent Claim
22 words
The process of claim 92, where the resin-filler coating has a coated film hardness of about 15 to about 25 (JIS K-5400).
Claim 96
Dependent Claim
26 words
The process of claim 93, wherein the resin filler coating comprises from 100 to 15% by weight of resin based on weight of resin plus filler.
Claim 97
Dependent Claim
61 words
The process of claim 94, where the resin filler coating comprises a resin which is an adhesive or a thermosetting resin, which thermosetting resin hardens at about 50* to about 80*C, and which adhesive resin is selected from the group consisting of nitrile copolymers of olefinic unsaturated acids, methyl methacrylic acid-acrylonitrile copolymers, methyl methacrylic acid-methacrylonitrile copolymers and acrylic acid ester copolymers.
Claim 98
Dependent Claim
35 words
The process of claim 95, where the resin in the resin filler coating is a nitrile copolymer of an olefinic unsaturated acid, an urea-formaldehyde condensate, a melamine-formaldehyde condensate - or an acrylic acid ester copolymer.
Claim 99
Dependent Claim
20 words
The process of claim 70, where the color difference between the surface layer and substrate is at least 3.0 (NBS).
Claim 100
Dependent Claim
48 words
The process of claim 70, wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; and colored thermoplastic resin substrate.
Claim 101
Dependent Claim
53 words
The process of claim 70, wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; and a resin layer without microvoids.
Claim 102
Dependent Claim
67 words
The process of claim 70, wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; and resin or resin containing filler coating having a coated film hardness of about 10 to about 30 (JIS K-5400).
Claim 103
Dependent Claim
72 words
The process of claim 70, wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoPlastic resin substrate; a resin layer without microvoids; and resin or resin containing filler coating having a coated film hardness of about 10 to about 30 (JIS K-5400).
Claim 104
Dependent Claim
79 words
The process of claim 70, wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; a resin layer which exhibits a surface comprising a plurality of microvoids; and resin or resin containing filler coating having a coated film hardness of about 10 to about 30 (JIS K-5400).
Claim 105
Dependent Claim
60 words
The process of claim 70, wherein the recording sheet consists essentially of the following layers, a writing surface layer being given initially and the remaining layer(s) being given in order of sequence thereunder: surface layer exhibiting a surface comprising a plurality of microvoids; colored thermoplastic resin substrate; and a resin layer which exhibits a surface comprising a plurality of microvoids.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |