US4515737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing composite plastic pipe
Assignee: DIC Corp
•
Filing: 1983-11-23
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Granted: 1985-05-07
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Expires: 2003-11-23
Abstract
Abstract A process for producing a composite plastic pipe, which comprises producing a thermoplastic resin pipe (I) by an extruder, covering the surface of the pipe (I) uniformly with a continuous fibrous reinforcing material (II) impregnated with a thermosetting resin in its axial direction by a draw molding method, helically winding a continuous fibrous reinforcing material (III) impregnated or not impregnated with a thermosetting resin uniformly on the layer of the resin fibrous reinforcing material (II) by a filament winding method, thereafter curing the thermosetting resin by irradiation of ultraviolet light and coating a thermoplastic resin (IV) on the resulting product within a crosshead die in an extruder.
Inventors
- 👤 Saburo Karino
- 👤 Yoshiaki Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:18
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/16; B29C48/18; B29C48/21; B29C48/001; B29C48/0013; B29C48/0015; B29C48/0016; B29C48/03; B29C48/09; B29C48/15; B29C48/151; B29C48/152; B29C48/153
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
122 words
A process for producing a composite plastic pipe, which comprises producing a thermoplastic resin pipe (I) by an extruder, covering the surface of the pipe (I) uniformly with a continuous fibrous reinforcing material (II) impregnated with a thermosetting resin selected from the group consisting of unsaturated polyester resins and unsaturated carboxylic acid-modified vinyl ester in its axial direction by a draw molding method, helically winding a continuous fibrous reinforcing material (III) impregnated or not impregnated with the thermosetting resin uniformly on the layer of the resin fibrous reinforcing material (II) by a filament winding method, thereafter curing the thermosetting resin by irradiation of ultraviolet light and coating a thermosplastic resin (IV) on the resulting product within a crosshead die in an extruder.
Claim 2
Dependent Claim
122 words
A process for producing a composite plastic pipe, which comprises producing a thermoplastic resin pipe (I) by an extruder, covering the surface of the pipe (I) uniformly with a continuous fibrous reinforcing material (II) impregnated with a thermosetting resin selected from the group consisting of unsaturated polyester resins and unsaturated carboxylic acid-modified vinyl ester in its axial direction by a draw molding method, helically winding a continuous fibrous reinforcing material (III) impregnated or not impregnated with the thermosetting resin uniformly on the layer of the resin fibrous reinforcing material (II) by a filament winding method, thereafter curing the thermosetting resin by irradiation of ultraviolet light and coating a thermosplastic resin (IV) on the resulting product within a crosshead die in an extruder.
Claim 3
Dependent Claim
128 words
A process for producing a composite plastic pipe, which comprises producing a thermoplastic resin pipe (I) by an extruder, covering the surface of the pipe (I) uniformly with a continuous fibrous reinforcing material (II) impregnated with a thermosetting resin selected from the group consisting of unsaturated polyester resins and unsaturated carboxylic acid-modified vinyl ester in its axial direction by a draw molding method, helically winding a continuous fibrous reinforcing material (III) impregnated or not impregnated with the thermosetting resin uniformly on the layer of the resin fibrous reinforcing material (II) by a filament winding method, thereafter curing the thermosetting resin by irradiation of ultraviolet light and then post-curing it by heating, and coating a thermoplastic resin (IV) on the resulting product within a crosshead die in an extruder.
Claim 4
Dependent Claim
128 words
A process for producing a composite plastic pipe, which comprises producing a thermoplastic resin pipe (I) by an extruder, covering the surface of the pipe (I) uniformly with a continuous fibrous reinforcing material (II) impregnated with a thermosetting resin selected from the group consisting of unsaturated polyester resins and unsaturated carboxylic acid-modified vinyl ester in its axial direction by a draw molding method, helically winding a continuous fibrous reinforcing material (III) impregnated or not impregnated with the thermosetting resin uniformly on the layer of the resin fibrous reinforcing material (II) by a filament winding method, thereafter curing the thermosetting resin by irradiation of ultraviolet light and then post-curing it by heating, and coating a thermoplastic resin (IV) on the resulting product within a crosshead die in an extruder.
Claim 5
Dependent Claim
70 words
The process of claim 1 wherein the thermoplastic resin pipe (I) is produced by using as a main component at least one resin selected from the group consisting of an olefin resin, a styrene resin, a polyamide resin, a vinyl chloride resin, a fluorocarbon resin, a polyester resin, a polycarbonate resin, a polyphenylene oxide resin, a polyphenylene sulfide resin, a polyphenylene sulfone resin, a polyacetal resin and a methacrylate resin.
Claim 6
Dependent Claim
36 words
The process of claim 1 wherein the continuous fibrous reinforcing material is a roving composed of fibers selected from the group consisting of glass fibers, metallic fibers, kevlar fibers, nylon fibers, rayon fibers and carbon fibers.
Claim 7
Dependent Claim
26 words
The process of claim 1 wherein the resin-impregnated continuous fibrous reinforcing materials (II) and (III) each contain 20 to 45% by weight of the thermosetting resin.
Claim 8
Dependent Claim
61 words
The process of claim 1 wherein the thermoplastic resin (IV) is selected from the group consisting of an olefin resin, a styrene resin, a polyamide resin, a vinyl chloride resin, a fluorocarbon resin, a polyester resin, a polycarbonate resin, a polyphenylene oxide resin, a polyphenylene sulfide resin, a polyphenylene sulfone resin, a polyacetal resin, a methacrylate resin, and a polyurethane resin.
Claim 9
Dependent Claim
27 words
The process of claim 1 wherein the continuous fibrous reinforcing material (II) contains a liquid unsaturated resin, a photopolymerization initiator, a curing accelerator and a curing catalyst.
Claim 10
Dependent Claim
18 words
The process of claim 1 wherein the continuous fibrous reinforcing material (III) is impregnated with a thermosetting resin.
Claim 11
Dependent Claim
102 words
The process of claim 1 wherein the continuous fibrous reinforcing material (III) is not impregnated with a thermosetting resin and wherein a portion of the thermosetting resin impregnated in the continuous fibrous reinforcing material (II) is caused to penetrate into some of the interstices in the reinforcing material (III) and the thermoplastic resin (IV) is caused to penetrate into the other interstices of the reinforcing material (III) whereby the layer of the helically wound continuous fibrous reinforcing material (III) is intimately bonded to the layer of the continuous fibrous reinforcing material (II) and also to the coating of the thermoplastic resin (IV).
Claim 12
Dependent Claim
27 words
The process of claim 2 wherein the continuous fibrous reinforcing material (II) contains a liquid unsaturated resin, a photopolymerization initiator, a curing accelerator and a curing catalyst.
Claim 13
Dependent Claim
18 words
The process of claim 2 wherein the continuous fibrous reinforcing material (III) is impregnated with a thermosetting resin.
Claim 14
Dependent Claim
103 words
The process of claim 2 wherein the continuous fibrous reinforcing material (III) is not impregnated with a thermosetting resin and wherein a portion of the thermosetting resin impregnated in the continuous fibrous reinforcing material (II) is caused to penetrate into some of the interstices in the reinforcing material (III) and the thermoplastic resin (IV) is caused to penetrate into some of the interstices of the reinforcing material (III) whereby the layer of the helically wound continuous fibrous reinforcing material (III) is intimately bonded to the layer of the continuous fibrous reinforcing material (II) and also to the coating of the thermoplastic resin (IV).
References Cited (Backward Citations)
US3616072A
Cited
US3769127A
Cited
US3756890A
Cited
US3883384A
Cited
US4155790A
Cited
US4311547A
Cited
US4371415A
Cited
US4214026A
Cited
US4289555A
Cited
US4302266A
Cited
US4361455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |