CN107940126B - Glass steel band reinforced thermoplastic resin winding pipe and preparation process thereof - Google Patents
Glass steel band reinforced thermoplastic resin winding pipe and preparation process thereof Download PDFInfo
- Publication number
- CN107940126B CN107940126B CN201711319741.6A CN201711319741A CN107940126B CN 107940126 B CN107940126 B CN 107940126B CN 201711319741 A CN201711319741 A CN 201711319741A CN 107940126 B CN107940126 B CN 107940126B
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- Prior art keywords
- resin
- glass steel
- thermoplastic resin
- glass
- pipe
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Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- 229920005992 thermoplastic resin Polymers 0.000 title claims abstract description 51
- 239000011521 glass Substances 0.000 title claims abstract description 47
- 238000004804 winding Methods 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 50
- 239000011347 resin Substances 0.000 claims abstract description 50
- 239000011152 fibreglass Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000000805 composite resin Substances 0.000 claims description 13
- -1 polyethylene Polymers 0.000 claims description 13
- 239000004698 Polyethylene Substances 0.000 claims description 12
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 6
- 229920001187 thermosetting polymer Polymers 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 150000001412 amines Chemical class 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 239000004709 Chlorinated polyethylene Substances 0.000 claims description 3
- 229920000877 Melamine resin Polymers 0.000 claims description 3
- 239000005062 Polybutadiene Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 150000008064 anhydrides Chemical class 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000007849 furan resin Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 238000004023 plastic welding Methods 0.000 claims description 3
- 229920002857 polybutadiene Polymers 0.000 claims description 3
- 229920001083 polybutene Polymers 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229920006337 unsaturated polyester resin Polymers 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/006—Rigid pipes specially profiled
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement
- F16L9/165—Rigid pipes wound from sheets or strips, with or without reinforcement of metal
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to the technical field of pipes, in particular to a glass steel band reinforced thermoplastic resin winding pipe and a preparation process thereof. The glass steel band reinforced thermoplastic resin winding pipe is characterized in that: the method is characterized in that: the glass fiber reinforced plastic pipe comprises inner resin and outer resin, wherein glass fiber reinforced plastic strips are uniformly wound between the inner resin and the outer resin, the glass fiber reinforced plastic strips are omega-shaped, plane extension parts are arranged on two sides of the bottom of each glass fiber reinforced plastic strip, bonding resin is arranged between the extension parts of two adjacent glass fiber reinforced plastic strips, and the pipe is stiff.
Description
Technical Field
The invention relates to the technical field of pipes, in particular to a glass steel band reinforced thermoplastic resin winding pipe and a preparation process thereof.
Background
At present, the buried drainage and sewage pipelines in the fields of municipal construction and the like mostly adopt a polyethylene spiral corrugated pipe reinforced by steel belts, and the reinforced polyethylene spiral corrugated pipe has the advantages of high rigidity, high strength, high ring rigidity and the like. The traditional steel band reinforced polyethylene spiral corrugated pipe is composed of an inner layer polyethylene, a spiral steel band and an outer layer polyethylene, wherein the spiral steel band plays a role in rigidity, and as the spiral steel band and the polyethylene are easily separated from each other in a layering manner, a layer of bonding resin is generally coated between the steel band and the polyethylene layer, and once the steel band is corroded, safety accidents are easily caused, and life and property safety of people is threatened.
Disclosure of Invention
The invention provides a glass steel band reinforced thermoplastic resin winding pipe with high peeling strength and difficult corrosion and a preparation process thereof, which overcomes the defects of the prior art.
The invention is realized by the following technical scheme:
a glass steel reinforced thermoplastic resin wound tube characterized by: the glass fiber reinforced plastic belt comprises inner resin and outer resin, wherein glass fiber reinforced plastic belts are uniformly wound between the inner resin and the outer resin, the glass fiber reinforced plastic belts are omega-shaped, plane extension parts are arranged on two sides of the bottom of each glass fiber reinforced plastic belt, and bonding resin is arranged between the extension parts of two adjacent glass fiber reinforced plastic belts.
The extension part is integrally formed with the glass steel belt, so that the rigidity of the winding pipe can be increased.
The inner layer resin and the outer layer resin are thermoplastic resins.
The bonding resin is thermoplastic resin, so that the connection tightness between the glass reinforced plastic belts is increased, and water and air are prevented from entering.
Further, the preparation process of the glass steel band reinforced thermoplastic resin winding pipe comprises the following steps:
(1) Preparing a glass steel band, namely preparing the omega-shaped glass steel band by using fibers, thermosetting resin, a curing agent and an accelerator as raw materials and adopting a pultrusion process;
(2) Preparing a glass steel belt/thermoplastic resin composite belt: preparing a glass fiber reinforced plastic/thermoplastic resin composite belt by using the glass fiber reinforced plastic belt prepared in the step (1) and the thermoplastic resin as raw materials and using an extruder;
(3) And (3) forming: winding the glass fiber reinforced plastic/thermoplastic resin composite belt prepared in the step (2) on a heated pipe mold, welding joints between the belts into a whole by adopting a plastic welding process, and cooling and forming;
(4) And demolding the cooled pipe and the mold, and cutting according to the required length.
The thermosetting resin in the step (1) is at least one of unsaturated polyester resin, epoxy resin, phenolic resin, melamine formaldehyde resin, furan resin, polybutadiene resin and organic silicon resin, and the accelerator is at least one of aliphatic amine accelerator, anhydride accelerator, amine accelerator and tin accelerator.
And (2) uniformly coating thermoplastic resin on the outer surface of the glass steel strip and the upper and lower surfaces of the extension part in the glass steel/thermoplastic resin composite strip, wherein the thermoplastic resin seals the opening of the lower part of the glass steel strip, so that the glass steel strip is convenient to be wound into a pipe subsequently.
In the molding process of the step (3), a small amount of thermoplastic resin is extruded at the joint of the glass fiber reinforced plastic/thermoplastic resin composite belt by using an extruder to serve as a bonding resin (4).
The thermoplastic resin in the step (2) and the step (3) is at least one of polyethylene, polypropylene, polybutene, polyvinyl chloride and chlorinated polyethylene.
The beneficial effects of the invention are as follows: the glass steel strip reinforced thermoplastic resin winding pipe disclosed by the invention has the advantages that an adhesive is not needed between the glass steel strip and the thermoplastic resin, the adhesive force between each layer is good, the pipe is stiff and solid, the ring stiffness is high, the peeling strength is higher than the peeling strength between the steel strip and the thermoplastic resin PE, the glass steel strip is used for replacing the steel strip, the weight of the pipe is greatly reduced, the material cost is reduced, the thermoplastic resin is used for bonding at a joint, the pipe is not damaged or corroded, the preparation process is simple, and the application prospect is very wide.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a glass reinforced plastic strip reinforced thermoplastic resin wound pipe according to the present invention;
in the figure, 1, inner resin, 2, outer resin, 3 glass steel band, 4 bonding resin and 5 extension parts.
Detailed Description
As shown in figure 1, the glass steel band reinforced thermoplastic resin winding pipe comprises an inner resin layer 1 and an outer resin layer 2, wherein omega-shaped glass steel bands 3 are uniformly wound between the inner resin layer 2 and the outer resin layer 2, two sides of the bottom of each glass steel band 3 are provided with integrally formed plane extension parts 5, and bonding resin 4 is arranged between the extension parts 5 of two adjacent glass steel bands 3.
The inner layer resin 1, the outer layer resin 2 and the bonding resin 4 are thermoplastic resins, and the bonding resin 4 increases the tightness of the connection between the glass steel strips 3 and prevents water and air from entering.
Further, the preparation process of the glass steel band reinforced thermoplastic resin winding pipe comprises the following steps:
(1) Preparing a glass steel band, namely preparing the omega-shaped glass steel band by using fibers, thermosetting resin, a curing agent and an accelerator as raw materials and adopting a pultrusion process;
(2) Preparing a glass steel belt/thermoplastic resin composite belt: preparing a glass fiber reinforced plastic/thermoplastic resin composite belt by using the glass fiber reinforced plastic belt prepared in the step (1) and the thermoplastic resin as raw materials and using an extruder;
(3) And (3) forming: winding the glass fiber reinforced plastic/thermoplastic resin composite belt prepared in the step (2) on a heated pipe mold, welding joints between the belts into a whole by adopting a plastic welding process, extruding a small amount of melted thermoplastic resin at the joints to serve as bonding resin 4 by using an extruder, and cooling and molding;
(4) And demolding the cooled pipe and the mold, and cutting according to the required length.
The thermoplastic resin is at least one of polyethylene, polypropylene, polybutene, polyvinyl chloride and chlorinated polyethylene.
The fiber in the step (1) is at least one of polyester fiber, glass fiber or carbon fiber; the thermosetting resin is at least one of unsaturated polyester resin, epoxy resin, phenolic resin, melamine formaldehyde resin, furan resin, polybutadiene resin and organic silicon resin; the accelerator is at least one of fatty amine accelerator, anhydride accelerator, amine accelerator and tin accelerator.
The pultrusion process and the extrusion process in the invention are mature processes in the prior art, and are not described in detail herein.
The glass steel strip reinforced thermoplastic resin winding pipe has the advantages that no adhesive is needed between the glass steel strip and the resin, the adhesive force between each layer is good, the pipe is stiff, the ring stiffness is high, the peeling strength is greater than 160N/cm and is higher than the peeling strength between the steel strip and PE, meanwhile, the glass steel strip is used for replacing the steel strip, the weight of the pipe is greatly reduced, the cost is reduced, the thermoplastic resin is used for bonding at the joint, the pipe cannot be damaged or rusted, the preparation process is simple, and the application prospect is very wide.
The present invention is not limited to the preferred embodiments, and any equivalent embodiments which can be changed or modified to equivalent variations by the technical content disclosed above can be applied to other fields by those skilled in the art, but any simple modification, equivalent variations and modification to the above embodiments according to the technical substance of the present invention can still fall within the scope of the technical solution of the present invention, unless departing from the technical content of the present invention.
Claims (3)
1. A preparation process of a glass steel band reinforced thermoplastic resin winding pipe is characterized in that: the prepared glass steel strip reinforced thermoplastic resin winding pipe comprises an inner layer resin (1) and an outer layer resin (2), wherein glass steel strips (3) are uniformly wound between the inner layer resin (1) and the outer layer resin (2), the glass steel strips (3) are omega-shaped, planar extension parts (5) are arranged on two sides of the bottom of each glass steel strip, and binding resin (4) is arranged between the extension parts (5) of two adjacent glass steel strips (3); the extension part (5) and the glass steel belt (3) are integrally formed; the inner layer resin (1), the outer layer resin (2) and the bonding resin (4) are thermoplastic resins;
the preparation process comprises the following steps:
(1) Preparing a glass steel band, namely preparing the omega-shaped glass steel band by using fibers, thermosetting resin, a curing agent and an accelerator as raw materials and adopting a pultrusion process;
(2) Preparing a glass steel belt/thermoplastic resin composite belt: preparing a glass fiber reinforced plastic/thermoplastic resin composite belt by using the glass fiber reinforced plastic belt prepared in the step (1) and the thermoplastic resin as raw materials and using an extruder; thermoplastic resin is uniformly coated on the outer surface of the glass steel belt (3) and the upper and lower surfaces of the extension part (5) in the glass steel/thermoplastic resin composite belt, and the thermoplastic resin seals the lower opening of the glass steel belt (3) so as to facilitate subsequent winding into a pipe;
(3) And (3) forming: winding the glass fiber reinforced plastic/thermoplastic resin composite belt prepared in the step (2) on a heated pipe mold, welding joints between the belts into a whole by adopting a plastic welding process, and cooling and forming; during the molding process, extruding a small amount of thermoplastic resin at the joint of the glass fiber reinforced plastic/thermoplastic resin composite belt by using an extruder as a bonding resin (4);
(4) And demolding the cooled pipe and the mold, and cutting according to the required length.
2. The process for producing a glass steel strip-reinforced thermoplastic resin wound pipe according to claim 1, wherein: the thermosetting resin in the step (1) is at least one of unsaturated polyester resin, epoxy resin, phenolic resin, melamine formaldehyde resin, furan resin, polybutadiene resin and organic silicon resin, and the accelerator is at least one of aliphatic amine accelerator, anhydride accelerator, amine accelerator and tin accelerator.
3. The process for producing a glass steel strip-reinforced thermoplastic resin wound pipe according to claim 1, wherein: at least one of thermoplastic resin polyethylene, polypropylene, polybutene, polyvinyl chloride and chlorinated polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711319741.6A CN107940126B (en) | 2017-12-12 | 2017-12-12 | Glass steel band reinforced thermoplastic resin winding pipe and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711319741.6A CN107940126B (en) | 2017-12-12 | 2017-12-12 | Glass steel band reinforced thermoplastic resin winding pipe and preparation process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107940126A CN107940126A (en) | 2018-04-20 |
| CN107940126B true CN107940126B (en) | 2023-10-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711319741.6A Active CN107940126B (en) | 2017-12-12 | 2017-12-12 | Glass steel band reinforced thermoplastic resin winding pipe and preparation process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107940126B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110328876A (en) * | 2019-07-08 | 2019-10-15 | 苏州艾特斯环保设备有限公司 | A kind of preparation method of fireproofing corrosion resistant erosion air hose |
| CN112664729A (en) * | 2020-12-17 | 2021-04-16 | 威海纳川管材有限公司 | Glass fiber reinforced plastic flexible composite pipe, production device and production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03149485A (en) * | 1989-10-31 | 1991-06-26 | Sekisui Chem Co Ltd | Multiple-unit tube |
| CN1111736A (en) * | 1994-12-03 | 1995-11-15 | 兰亚军 | Pipe material made from plastic alloy double-composite modified reinforced fibre glass and manufacturing method thereof |
| CN101493162A (en) * | 2008-01-23 | 2009-07-29 | 核工业第八研究所 | Rectangle thin wall pipe material and method for manufacturing same |
| CN103363204A (en) * | 2012-03-29 | 2013-10-23 | 上海杰事杰新材料(集团)股份有限公司 | Continuous-fiber-enhanced thermoplastic resin wound pipe and method for forming same |
| CN103434157A (en) * | 2013-08-22 | 2013-12-11 | 天津盛象塑料管业有限公司 | Production method for high-rigidity steel strip reinforced polyethylene helical bellows |
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| CN103791174A (en) * | 2012-11-01 | 2014-05-14 | 合肥杰事杰新材料股份有限公司 | Composite wound thermoplastic glass-reinforced-plastic pipe and production method thereof |
| CN104329514A (en) * | 2014-09-24 | 2015-02-04 | 四川省川杭塑胶科技有限公司 | Steel strip-reinforced polyethylene spiral corrugated pipe |
| CN208011095U (en) * | 2017-12-12 | 2018-10-26 | 山东柏远复合材料科技有限公司 | A kind of thermoplastic resin winding pipe of glass steel strip reinforced |
-
2017
- 2017-12-12 CN CN201711319741.6A patent/CN107940126B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03149485A (en) * | 1989-10-31 | 1991-06-26 | Sekisui Chem Co Ltd | Multiple-unit tube |
| CN1111736A (en) * | 1994-12-03 | 1995-11-15 | 兰亚军 | Pipe material made from plastic alloy double-composite modified reinforced fibre glass and manufacturing method thereof |
| CN101493162A (en) * | 2008-01-23 | 2009-07-29 | 核工业第八研究所 | Rectangle thin wall pipe material and method for manufacturing same |
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| Publication number | Publication date |
|---|---|
| CN107940126A (en) | 2018-04-20 |
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Address after: 274200 east of Deshang highway, Chengwu County, Heze City, Shandong Province (one kilometer south of the bus station) Applicant after: Shandong Baiyuan composite material technology Co.,Ltd. Address before: 274200 East of Chengwude Commercial Highway in Heze City, Shandong Province (one kilometer south of the bus station) Applicant before: SHANDONG BOYUAN COMPOSITE MATERIALS TECHNOLOGY Co.,Ltd. |
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