EP0391076A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Stabilized synthetic pulp-cellulose blends
Assignee: Hercules LLC
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Filing: 1990-03-05
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Granted: —
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Expires: 2010-03-05
Abstract
Abstract A method for preparing a stabilized blend of a polyolefin and wood pulp suitable for use in an absorbent article, in which a polyolefin, a solvent for the polyolefin, and from 0.1-1.0% by weight, based on the weight of polyolefin, of an antioxidant stabilizer that is compatible with the polyolefin are combined and heated to form a homogeneous solution of the polyolefin and antioxidant in the solvent, the solution is formed into a polyolefin pulp, and the polyolefin pulp is mixed with from about 50 to about 95% by weight, based on the total weight of the blend, of a wood pulp, to form a blend that is not subject to ignition at processing temperatures.
Inventors
- 👤 Edward Jacob Engle Iii
- 👤 Elliot Nmn Echt
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 20:09
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225; D; D01; D01D; D01D5/00; D01D5/11; D01F; D01F6/00; D01F6/02; D01F6/04; D21; D21H; D21H13/00; D21H13/10; D21H13/12; D21H13/14; C08J2323/00; C08J2323/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
99 words
A method for preparing a blend of a synthetic pulp and a hydrophilic short fiber, is characterized in that a polyolefin, a solvent for the polylolefin, and from 0.1-1.0% by weight, based on the weight of polyolefin, of an antioxidant stabilizer that is compatible with the polyolefin are combined and heated to form a homogeneous solution of the polyolefin and antioxidant in the solvent, the solution is formed into a polyolefin pulp, and the polyolefin pulp is mixed with from about 50 to about 95% by weight, based on the total weight of the blend, of a wood pulp.
Claim 2
Independent Claim
99 words
A method for preparing a blend of a synthetic pulp and a hydrophilic short fiber, is characterized in that a polyolefin, a solvent for the polylolefin, and from 0.1-1.0% by weight, based on the weight of polyolefin, of an antioxidant stabilizer that is compatible with the polyolefin are combined and heated to form a homogeneous solution of the polyolefin and antioxidant in the solvent, the solution is formed into a polyolefin pulp, and the polyolefin pulp is mixed with from about 50 to about 95% by weight, based on the total weight of the blend, of a wood pulp.
Claim 3
Dependent Claim
31 words
A method for preparing a stabilized blend as claimed in claim 1, further characterized in that the antioxidant stabilizer is a thioether antioxidant, a hindered phenolic antioxidant, or a phosphite antioxidant.
Claim 4
Dependent Claim
32 words
A method for preparing a stabilized blend as claimed in claim 1 or 2, further characterized in that the amount of the antioxidant stabilizer is about 0.1 to about 0.4% by weight.
Claim 5
Dependent Claim
40 words
A method for preparing a stabilized blend as claimed in claim 1, 2, or 3, further characterized in that the antioxidant stabilizer is a combination of 0.125% of Irgafos 168 and 0.125% of Irganox 1010, by weight of the polyolefin.
Claim 6
Independent Claim
23 words
A method for preparing a stabilized blend as claimed in any of the preceeding claims, further characterized in that the polyolefin is polyethylene.
Claim 7
Dependent Claim
22 words
A method for preparing a stabilized blend as claimed in claim 5, further characterized in that the polyethylene is high density polyethylene.
Claim 8
Independent Claim
29 words
A method for preparing a stabilized blend as claimed in any of claims 1-4, further characterized in that the polyolefin is an ethylene copolymer with 1-butene, 1-hexene, or 1-octene.
Claim 9
Independent Claim
31 words
A method for preparing a stabilized blend as claimed in any of the preceeding claims, further characterized in that the solution is formed into a polyolefin pulp by solution flash spinning.
References Cited (Backward Citations)
No citation records indexed.
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