US3892900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Masking films
Assignee: Daicel Corp
•
Filing: 1973-10-24
•
Granted: 1975-07-01
•
Expires: 1993-10-24
Abstract
Abstract A substantially transparent and colored masking film for photoengraving has a substantially transparent supporting plastic film on which an adhesive undercoating, a colored resin layer and a pressure-sensitive adhesive are successively laminated. A strippable plastic film is set over the adhesive layer of said laminate.
Inventors
- 👤 Keizo Shima
- 👤 Tetsuo Ishihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:00
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/29; B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B27/32; B32B27/36; B32B7/00; B32B7/04; B32B7/12; G; G03; G03F; G03F1/00; G03F1/68; B32B2307/00; B32B2307/40; B32B2307/402; B32B2307/4026; B32B2307/412; B32B2307/50; B32B2307/514; B32B2307/518; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2323/00; B32B2323/10; B32B2551/00; C09J2301/00; C09J2301/10; C09J2301/16; C09J2301/162; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1424; Y10T428/1433; Y10T428/24; Y10T428/24355
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
93 words
A MASKING FILM FOR MASKING A PHOTO-SENSITIVE MATERIAL, CONSISTING ESSENTIALLY OF A LAMINATE OF: A. A SUBSTANTIALLY TRANSPARENT SUPPORTING PLASTIC FILM, AT LEAST ONE SURFACE HAVING BEEN TREATED BY ROUGHENING OR OXIDATION, B. A COLORED RESIN LAYER ADHERED ON SAID TREATED SURFACE THROUGH AN ADHESIVE UNDERCOATING, THE COLOR OF SAID RESIN LAYER BEING SUCH AS TO BE OPAQUE TO LIGHT USED TO EXPOSE SAID PHOTO-SENSITIVE MATERIAL AND TRANSPARENT TO OTHER VISISBLE LIGHT, AND C. A STRIPPABLE FILM HAVING AT LEAST ONE STRIPPABLE SURFACE ADHERED TO SAID COLORED RESIN LAYER THROUGH A PRESSURESENSITIVE ADHESIVE.
Claim 2
Dependent Claim
93 words
A MASKING FILM FOR MASKING A PHOTO-SENSITIVE MATERIAL, CONSISTING ESSENTIALLY OF A LAMINATE OF: A. A SUBSTANTIALLY TRANSPARENT SUPPORTING PLASTIC FILM, AT LEAST ONE SURFACE HAVING BEEN TREATED BY ROUGHENING OR OXIDATION, B. A COLORED RESIN LAYER ADHERED ON SAID TREATED SURFACE THROUGH AN ADHESIVE UNDERCOATING, THE COLOR OF SAID RESIN LAYER BEING SUCH AS TO BE OPAQUE TO LIGHT USED TO EXPOSE SAID PHOTO-SENSITIVE MATERIAL AND TRANSPARENT TO OTHER VISISBLE LIGHT, AND C. A STRIPPABLE FILM HAVING AT LEAST ONE STRIPPABLE SURFACE ADHERED TO SAID COLORED RESIN LAYER THROUGH A PRESSURESENSITIVE ADHESIVE.
Claim 3
Dependent Claim
36 words
A masking film in accordance with claim 1, in which the substantially transparent supporting plastic film is a film of polyethyleneterephthalate, polybutyleneterephthalate, polyoxybenzoate, polyisobutyleneoxide, polycarbonate, polystyrene, nylon-6, nylon-66, nylon-10, nylon-11, nylon-12, polyethylene, polypropylene, polybuten-1 or poly(4-methylpentene-1).
Claim 4
Dependent Claim
29 words
A masking film in accordance with claim 1, in which the substantially transparent supporting plastic film is a biaxially oriented polypropylene or polyethyleneterephthalate film, or a non-oriented nylon-12 film.
Claim 5
Dependent Claim
72 words
A masking film in accordance with claim 1, in which the adhesive undercoating comprises a mixture containing isophthalic polyester, butyl-etherified melamine and a small amount of sulfuric acid, a mixture containing isophthalic polyester and a preliminary condensate of a polyol with a diisocyanate having remaining active isocyanate groups or a mixture containing a vinyl chloride/vinyl acetate copolymer and a preliminary condensate of a polyol with a diisocyanate having remaining active isocyanate groups.
Claim 6
Dependent Claim
55 words
A masking film in accordance with claim 1, in which the adhesive undercoating comprises a mixture containing isophthalic polyester, butyl-etherified melamine and sulfuric acid in which the weight ratio of isophthalic polyester and butyl-etherified melamine is about 2:8 to 9:1 and the weight ratio of sulfuric acid and butyl-etherified melamine is about 1:100 to 0.5:100.
Claim 7
Dependent Claim
72 words
A masking film in accordance with claim 1, in which the colored resin layer comprises a resin selected from the group consisting of nitrocellulose, cellulose acetate, cellulose acetate propionate, cellulose acetate butylate, ethoxy cellulose, vinyl chloride resin, styrene resin, acrylic acid resin, acrylic ester resin, polyester resin, polyurethane resin, polyamide resin, and aminoalkyd resin, and 80 to 120 parts by weight of a colorant per 100 parts by weight of the resin.
Claim 8
Dependent Claim
52 words
A masking film in accordance with claim 1, in which the total thickness of layers (A) and (B) and the pressure-sensitive adhesive is about 15 to 70 microns and the total thickness of all layers except the strippable film and the substantially transparent supporting plastic film is about 5.5 to 20 microns.
Claim 9
Dependent Claim
69 words
A masking film in accordance with claim 1, which comprises a laminate of a substantially transparent biaxially oriented polypropylene film having a corona discharged surface, a reddish nitrocellulose layer adhered to said surface through an adhesive undercoating containing isophthalic polyester, butyl-etherified melamine and sulfuric acid, and a biaxially oriented polypropylene film over said nitrocellulose layer, a wax release agent layer on said polypropylene film being against said nitrocellulose layer.
Claim 10
Dependent Claim
72 words
A masking film in accordance with claim 1, which comprises a laminate of a substantially transparent biaxially oriented polypropylene film having a corona discharged surface, a reddish nitrocellulose layer adhered to said surface through an adhesive undercoating containing isophthalic polyester, butyl-etherified melamine and sulfuric acid, and a biaxially oriented polypropylene film over said nitrocellulose layer, a vinylsilane silicone resin surface coated on said biaxially oriented polypropylene film being against said nitrocellulose layer.
Claim 11
Dependent Claim
32 words
A masking film in accordance with claim 1, in which the substantially transparent supporting plastic film is a biaxially oriented polypropylene film and the strippable film is a biaxially oriented polyethyleneterephthalate film.
Claim 12
Dependent Claim
32 words
A masking film in accordance with claim 1, in which the substantially transparent supporting plastic film is a biaxially oriented polyethyleneterephthalate film and the strippable film is a biaxially oriented polypropylene film.
Claim 13
Dependent Claim
29 words
A masking film in accordance with claim 1, in which both of the substantially transparent supporting plastic film and the strippable film are each a biaxially oriented polyethyleneterephthalate film.
Claim 14
Dependent Claim
65 words
A laminate for masking a photo-sensitive material consisting essentially of a substantially transparent supporting plastic film in which at least one surface is roughened or oxidized, and a colored resin layer adhered on said surface through an adhesive undercoating, the color of said resin layer being such as to be opaque to light used to expose said photosensitive material and transparent to other visible light.
Claim 15
Dependent Claim
65 words
A laminate for masking a photo-sensitive material consisting essentially of a substantially transparent supporting plastic film in which at least one surface is roughened or oxidized, and a colored resin layer adhered on said surface through an adhesive undercoating, the color of said resin layer being such as to be opaque to light used to expose said photosensitive material and transparent to other visible light.
Claim 16
Dependent Claim
56 words
A laminate in accordance with claim 13, in which the substantially transparent supporting plastic film is a biaxially oriented polypropylene or polyethyleneterephthalate film, the colored resin layer comprises a mixture containing nitrocellulose and at least one colorant, and the adhesive undercoating comprises a mixture containing isophthalic polyester, butyl-etherified melamine and a small amount of sulfuric acid.
Claim 17
Dependent Claim
21 words
A masking film according to claim 7, wherein the thickness of the colored resin layer is about 3 to 10 microns.
References Cited (Backward Citations)
US1781834A
Cited
US2162332A
Cited
US2576491A
Cited
US2684918A
Cited
US3227605A
Cited
US3036930A
Cited
US3065120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |