US4559103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging paper and packaging material for packaging metallic material and method of producing the same
Assignee: Honshu Seishi KK
•
Filing: 1983-07-28
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Granted: 1985-12-17
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Expires: 2003-07-28
Abstract
Abstract Disclosed is a method of producing a packaging paper for packaging metallic materials, as well as a packaging material such as corrugated box produced from the packaging paper, the method comprising at least one of the steps of (i) pulping a material by a cooking liquor containing no sulfur compound, or pulping the material by a cooking liquor containing a sulfur compound and then oxidizing the pulp with a peroxide, (ii) conducting the paper making step in the neutral region of pH value ranging between 6 and 8, and (iii) applying a rust-prevention agent and/or a sterilizer to the paper sheet. Disclosed also are a packaging paper and packaging material for packaging metallic materials, produced by the above-mentioned method.
Inventors
- 👤 Yoshika Nomura
- 👤 Susumu Sano
- 👤 Sadahiro Shoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:36
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; D; D21; D21H; D21H21/00; D21H21/14; D21H21/36; B32B29/00; B32B29/002; B32B2439/00; B32B2439/40; B32B2439/62; B32B2553/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
A method for producing a packaging paper for packaging metallic materials comprising the steps of: (A) pulping a lignocellulose material by a soda cooking liquor containing no sulfur comound having at least one quinone added thereto in an amount of 0.02 to 0.2 wt. % based on the weight of the oven-dry lignocellulose material to prepare a sulfur free pulp; (B) making a paper sheet from said pulp in a neutral pH range between 6 and 8; and (C) applying an agent having a rust-prevention effect to a surface of said paper sheet in an amount sufficient to prevent rusting of the metallic materials, said agent being selected from the group consisting of sodium benzoate, sodium nitrite, and sodium phosphate.
Claim 2
Independent Claim
120 words
A method for producing a packaging paper for packaging metallic materials comprising the steps of: (A) pulping a lignocellulose material by a soda cooking liquor containing no sulfur comound having at least one quinone added thereto in an amount of 0.02 to 0.2 wt. % based on the weight of the oven-dry lignocellulose material to prepare a sulfur free pulp; (B) making a paper sheet from said pulp in a neutral pH range between 6 and 8; and (C) applying an agent having a rust-prevention effect to a surface of said paper sheet in an amount sufficient to prevent rusting of the metallic materials, said agent being selected from the group consisting of sodium benzoate, sodium nitrite, and sodium phosphate.
Claim 3
Dependent Claim
15 words
A packaging paper for packaging metallic materials, produced by the method according to claim 1.
Claim 4
Independent Claim
163 words
A method for producing a packaging material for packaging metallic materials comprising the steps of: (A) pulping a lignocellulose material by a soda cooking liquor containing no sulfur compound having at least one quinone added thereto in an amount of 0.02 to 0.2 wt.% based on the weight of the oven-dry lignocellulose material to prepare a sulfur free pulp; (B) making a paper sheet from said pulp in a neutral pH range between 6 and 8; and (C) applying to a surface of at least one of said paper sheets an agent having a rust prevention effect in an amount sufficient to prevent rusting of the metallic materials and a sterilizer in a ratio of 0.1 to 3 wt.% based on the weight of said paper sheet, said agent being selected from the group consisting of sodium benzoate, sodium nitrite, and sodium phosphate, and said sterilizer being selected from the group consisting of dehydroacetic acid, ethyl ester of p-oxybenzoic acid, and potassium sorbate.
Claim 5
Independent Claim
163 words
A method for producing a packaging material for packaging metallic materials comprising the steps of: (A) pulping a lignocellulose material by a soda cooking liquor containing no sulfur compound having at least one quinone added thereto in an amount of 0.02 to 0.2 wt.% based on the weight of the oven-dry lignocellulose material to prepare a sulfur free pulp; (B) making a paper sheet from said pulp in a neutral pH range between 6 and 8; and (C) applying to a surface of at least one of said paper sheets an agent having a rust prevention effect in an amount sufficient to prevent rusting of the metallic materials and a sterilizer in a ratio of 0.1 to 3 wt.% based on the weight of said paper sheet, said agent being selected from the group consisting of sodium benzoate, sodium nitrite, and sodium phosphate, and said sterilizer being selected from the group consisting of dehydroacetic acid, ethyl ester of p-oxybenzoic acid, and potassium sorbate.
Claim 6
Dependent Claim
34 words
A method for producing a packaging material for packaging metallic materials according to claim 3, wherein at least two of said paper sheets are bonded by an adhesive containing said agent and said sterilizer.
Claim 7
Dependent Claim
20 words
A packaging material for packaging metallic materials, produced by the method according to any one of claims 3 and 4.
Claim 8
Dependent Claim
14 words
A packaging material according to claim 5, wherein said packaging material is a container.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |