US4606144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monofilament of improved vinylidene fluoride-based resin
Assignee: Kureha Corp
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Filing: 1985-02-04
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Granted: 1986-08-19
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Expires: 2005-02-04
Abstract
Abstract A flexible monofilament of at least 0.08 mm in diameter excellent in transparency, high in impact strength and durability and showing a tensile strength of not less than 30 kg/mm 2 and a modulus of elasticity of 60 to 120 kg/mm 2 , which is essentially composed of a vinylidene fluoride-based resin, a polymeric substance and a polyester plasticizer and is prepared by the process comprising the steps of: melt-spinning of a resin composition comprising essentially of 100 parts by weight of said vinylidene fluoride based resin selected from homopolymers of vinylidene fluoride and copolymers thereof; 5 to 15 parts by weight of said polymeric substance selected from homopolymers of methyl acrylate, copolymers comprising at least 85% by weight of methyl acrylate units and at most 15% by weight of isobutylene units and mixture thereof; and 2 to 7 parts by weight of said polyester plasticizer selected from the group consisting of polyesters of 1,100 to 5,000 in molecular weight obtained from an alcohol of 4 to 7 carbon atoms and a carboxylic acid of 4 to 8 carbon atoms and polyesters of 1,500 to 4,000 in molecular weight obtained from a dihydric alcohol of 2 to 4 carbon atoms and a dicarboxylic acid of 4 to 6 carbon atoms, thereby obtaining an unstretched monofilament, stretching the thus obtained unstretched monofilament in a heating medium, and subjecting the thus stretched monofilament to relaxation thereby obtaining said flexible monofilament.
Inventors
- 👤 Tohru Sasaki
- 👤 Kunizoh Kidoh
- 👤 Hiroyuki Endoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:48
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/44; D01F6/48; A; A01; A01K; A01K91/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
242 words
A flexible bubble-free monofilament of at least 0.08 mm in diameter, excellent in transparency, high in impact strength and durability and having a specific gravity of 1.65 to 1.83, a tensile strength of not less than 30 kg/mm 2 and a modulus of elasticity of 60 to 120 kg/mm 2 , which is essentially composed of a vinylidene fluoride-based resin, a polymeric substance containing at least 85% by weight of methyl acrylate and a polyester plasticizer and is prepared by the process comprising the steps of: melt-spinning of a resin composition consisting essentially of 100 parts by weight of said vinylidene fluoride based resin selected from homopolymers of vinylidene fluoride and copolymers thereof; 5 to 15 parts by weight of said polymeric substance selected from homopolymers of methyl acrylate, copolymers comprising at least 85% by weight of methyl acrylate units and at most 15% by weight of isobutylene units and mixture thereof; and 2 to 7 parts by weight of said polyester plasticizer selected from the group consisting of polyesters of 1,100 to 5,000 in molecular weight obtained from an alcohol of 4 to 7 carbon atoms and a carboxylic acid of 4 to 8 carbon atoms and polyesters of 1,500 to 4,000 in molecular weight obtained from a dihydric alcohol of 2 to 4 carbon atoms and a dicarboxylic acid of 4 to 6 carbon atoms, thereby obtaining an unstretched monofilament, stretching the thus obtained unstretched monofilament in a heating medium.
Claim 2
Dependent Claim
242 words
A flexible bubble-free monofilament of at least 0.08 mm in diameter, excellent in transparency, high in impact strength and durability and having a specific gravity of 1.65 to 1.83, a tensile strength of not less than 30 kg/mm 2 and a modulus of elasticity of 60 to 120 kg/mm 2 , which is essentially composed of a vinylidene fluoride-based resin, a polymeric substance containing at least 85% by weight of methyl acrylate and a polyester plasticizer and is prepared by the process comprising the steps of: melt-spinning of a resin composition consisting essentially of 100 parts by weight of said vinylidene fluoride based resin selected from homopolymers of vinylidene fluoride and copolymers thereof; 5 to 15 parts by weight of said polymeric substance selected from homopolymers of methyl acrylate, copolymers comprising at least 85% by weight of methyl acrylate units and at most 15% by weight of isobutylene units and mixture thereof; and 2 to 7 parts by weight of said polyester plasticizer selected from the group consisting of polyesters of 1,100 to 5,000 in molecular weight obtained from an alcohol of 4 to 7 carbon atoms and a carboxylic acid of 4 to 8 carbon atoms and polyesters of 1,500 to 4,000 in molecular weight obtained from a dihydric alcohol of 2 to 4 carbon atoms and a dicarboxylic acid of 4 to 6 carbon atoms, thereby obtaining an unstretched monofilament, stretching the thus obtained unstretched monofilament in a heating medium.
Claim 3
Dependent Claim
22 words
A flexible monofilament according to claim 1, wherein the thus stretched monofilament is further subjected to relaxation thereby obtaining said flexible monofilament.
Claim 4
Dependent Claim
56 words
A flexible monofilament according to claim 1, wherein said unstretched monofilament is first stretched 4.0 to 5.5 times in length within the heating medium at a temperature of 150° to 165° C., followed by an additional stretching of 1.1 to 1.2 times in length within the heating medium at a temperature of 160° to 165° C.
Claim 5
Dependent Claim
29 words
A flexible monofilament according to claim 2, wherein said stretched monofilament is subjected to relaxation of 5 to 20% in length in dry heat of 80° to 160° C.
Claim 6
Dependent Claim
40 words
A flexible monofilament of claim 1, wherein said polymeric substance is incorporated into the vinylidene fluoride-based resin by an intra-particle post-polymerization of methyl acrylate or a mixture of methyl acrylate and isobuthylene in the particle of said vinylidene fluoride-based resin.
Claim 7
Dependent Claim
19 words
A flexible monofilament of claim 1, wherein said vinylidene fluoride-based resin is a homopolymer or copolymer of vinylidene fluoride.
Claim 8
Dependent Claim
30 words
A flexible monofilament according to claim 1, wherein the amount of the said polymeric substance is more than two times by weight as much as that of the polyester plasticizer.
Claim 9
Dependent Claim
14 words
A flexible monofilament according to claim 1, in the form of a fishing line.
Claim 10
Dependent Claim
14 words
A flexible monofilament according to claim 2, in the form of a fishing line.
Claim 11
Dependent Claim
14 words
A flexible monofilament according to claim 3, in the form of a fishing line.
Claim 12
Dependent Claim
14 words
A flexible monofilament according to claim 4, in the form of a fishing line.
Claim 13
Dependent Claim
14 words
A flexible monofilament according to claim 5, in the form of a fishing line.
Claim 14
Dependent Claim
14 words
A flexible monofilament according to claim 6, in the form of a fishing line.
Claim 15
Dependent Claim
14 words
A flexible monofilament according to claim 7, in the form of a fishing line.
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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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |