CN113119532A - High-strength modified plastic composite pipe and manufacturing process thereof - Google Patents
High-strength modified plastic composite pipe and manufacturing process thereof Download PDFInfo
- Publication number
- CN113119532A CN113119532A CN201911390017.1A CN201911390017A CN113119532A CN 113119532 A CN113119532 A CN 113119532A CN 201911390017 A CN201911390017 A CN 201911390017A CN 113119532 A CN113119532 A CN 113119532A
- Authority
- CN
- China
- Prior art keywords
- ppr
- rigid layer
- pipe
- mounting bracket
- high strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004033 plastic Substances 0.000 title claims abstract description 24
- 229920003023 plastic Polymers 0.000 title claims abstract description 24
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000010521 absorption reaction Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 5
- 150000001875 compounds Chemical class 0.000 claims abstract description 4
- 239000004743 Polypropylene Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 238000009941 weaving Methods 0.000 claims description 13
- 229920000742 Cotton Polymers 0.000 claims description 9
- -1 polypropylene Polymers 0.000 claims description 9
- 229920001155 polypropylene Polymers 0.000 claims description 9
- 238000004080 punching Methods 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000005491 wire drawing Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 abstract description 2
- 239000003292 glue Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000012745 toughening agent Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
- F16L9/12—Rigid pipes of plastics with or without reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a high-strength modified plastic composite pipe and a manufacturing process thereof, belonging to the field of polymer modified plastics and comprising a PPR pipe, wherein the outer surface of the PPR pipe is wrapped with a first rigid layer, the first rigid layer is wrapped with a second rigid layer, a PPR mounting bracket is arranged in the PPR pipe, a guide rail is reserved on the outer surface of the PPR mounting bracket, sliding grooves with the same number as the guide rails are reserved on the inner wall of the PPR pipe, the PPR mounting bracket and the PPR pipe form a disassembly and assembly structure through the matching of the guide rails and the sliding grooves, a through hole is reserved on the PPR mounting bracket, an oil absorption layer is arranged in the PPR mounting bracket, and the PPR pipe, the first rigid layer and the second rigid layer are fixed through a glue joint process. This compound pipe of modified plastics of high strength possesses the explosion-proof effect of high strength, and the rigidity is good, and convenient clear stifled, can be widely used in chemical industry or life field, possesses application prospect.
Description
Technical Field
The invention relates to the technical field of polymer modified plastics, in particular to a high-strength modified plastic composite pipe and a manufacturing process thereof.
Background
Plastic pipes are used in many fields, wherein common plastic pipes in daily life are water pipes or oil smoke pipes, which are indispensable parts in daily life, and the materials for manufacturing the pipes can endow the pipes with performance according to actual needs, such as high temperature resistant pipes, explosion-proof pipes, and the like.
However, the current pipeline still has some problems in practical use, for example, the water pipe for water delivery often bursts due to rapid cooling and heating in daily use, the water pipe bursts and hot water hurts people frequently, and the interior of the pipeline is easily blocked after long-term use, which causes a problem of difficult cleaning, or the pipeline applied in other fields has a problem of easy bursting due to external force because of low rigidity, so we propose a high-strength modified plastic composite pipe to solve the above problems.
Disclosure of Invention
The invention aims to provide a high-strength modified plastic composite pipe and a manufacturing process thereof, and aims to solve the problems of explosion prevention and difficulty in cleaning of the conventional pipeline in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a modified plastics composite pipe of high strength, includes the PPR pipe, the surface parcel of PPR pipe has first rigid layer, and the parcel has second rigid layer on the first rigid layer, the internally mounted of PPR pipe has the PPR installing support, and reserves the guide rail on the surface of PPR installing support, reserve on the inner wall of PPR pipe and have the spout unanimous with guide rail quantity, and the cooperation that the PPR installing support passes through guide rail and spout, constitute with the PPR pipe and dismantle mounting structure, it has the through-hole still to reserve on the PPR installing support, and the internally mounted of PPR installing support has the oil absorption layer, it is fixed through the process of splicing between PPR pipe, first rigid layer and the second rigid layer.
Preferably, the materials of the first rigid layer and the second rigid layer are both copolymerized PP toughening and modifying materials.
Preferably, the first rigid layer and the second rigid layer are formed by cross weaving, and the cross weaving angle of the first rigid layer and the second rigid layer is 30-45 degrees.
Preferably, the sliding groove and the guide rail are respectively provided with 4, and a gap is reserved between the sliding groove and the guide rail.
Preferably, the oil absorption layer is made of polypropylene adsorption cotton, and the outer wall of the oil absorption layer is glued to the inner wall of the PPR mounting bracket.
Preferably, the through-hole is even to be reserved on the surface of PPR installing support, and the through-hole runs through PPR installing support.
The invention also provides a manufacturing process of the high-strength modified plastic composite pipe, which comprises the following steps:
s1: adding the materials used for the first rigid layer and the second rigid layer into a wire drawing machine for heating and extrusion, and cutting and drawing the materials into wires for later use;
s2: manufacturing a needed PPR pipe and a needed PPR mounting bracket by using an extruder, and cooling for later use;
s3: punching the PPR mounting bracket by using a punching machine;
s4: an oil absorption layer made of polypropylene adsorption cotton is glued to the inner wall of the PPR mounting bracket;
s5: weaving a first rigid layer and a second rigid layer onto the PPR tube by using a circular weaving machine;
s6: and loading the PPR mounting bracket into the PPR pipe to obtain a finished product.
Compared with the prior art, the invention has the beneficial effects that: this compound pipe of modified plastics of high strength is through being the fork form at the skin and weaving copolymerization PP toughening modification material, the intensity of increase PPR pipe that can be very big, make the PPR pipe be equipped with good anticollision and anti-bending effect, and adsorb the cotton through set up polypropylene in the pipe, can effectively adsorb the oil stain of aquatic, adopt detachable support mounting polypropylene to adsorb the cotton simultaneously, can effectively avoid being blockked up in the pipeline, it is clear stifled to facilitate the construction, can take precautions against and be applicable to chemical industry and life field, and the use prospect is possessed.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic view of a PPR tube structure according to the present invention;
FIG. 3 is a schematic top view of a PPR mounting bracket according to the present invention;
FIG. 4 is a schematic view of a PPR mounting bracket of the present invention;
fig. 5 is a schematic view of a cross-connecting structure of a first rigid layer and a second rigid layer according to the present invention.
In the figure: 1. a PPR tube; 2. a first rigid layer; 3. a second rigid layer; 4. a chute; 5. a PPR mounting bracket; 6. a guide rail; 7. an oil-absorbing layer; 8. and a through hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1-5, a high-strength modified plastic composite pipe includes a PPR pipe 1, a first rigid layer 2, a second rigid layer 3, a chute 4, a PPR mounting bracket 5, a guide rail 6, an oil absorption layer 7, and a through hole 8, the outer surface of the PPR pipe 1 is wrapped by the first rigid layer 2, and the first rigid layer 2 is wrapped with a second rigid layer 3, a PPR mounting bracket 5 is arranged in the PPR pipe 1, guide rails 6 are reserved on the outer surface of the PPR mounting bracket 5, sliding grooves 4 with the same number as the guide rails 6 are reserved on the inner wall of the PPR pipe 1, the PPR mounting bracket 5 is matched with the sliding grooves 4 through the guide rails 6, a dismounting and mounting structure is formed with the PPR pipe 1, a through hole 8 is reserved on the PPR mounting bracket 5, and the inside of the PPR installing support 5 is provided with an oil absorption layer 7, and the PPR pipe 1, the first rigid layer 2 and the second rigid layer 3 are fixed through a gluing process.
The materials of the first rigid layer 2 and the second rigid layer 3 are copolymerized PP toughening modified materials, the copolymerized P P has good flexibility and impact resistance, and the copolymerized PP has good toughness through the toughening agent modification, so that the rigid layers can be smoothly woven on the PPR pipe 1.
Preferably, the mass ratio of the copolymerized PP to the toughening agent is 8: 1, and the toughening agent is preferably EVA or POE.
The first rigid layer 2 and the second rigid layer 3 are formed by cross weaving, the cross weaving angle of the first rigid layer 2 and the second rigid layer 3 is 30-45 degrees, the rigidity of the high-strength composite pipe can be increased by cross weaving of the two rigid layers, and the pipe can be effectively prevented from being impacted or extruded, bent and burst.
Preferably, the first rigid layer 2 and the second rigid layer 3 have a braiding angle of 37 °.
The material of oil absorption layer 7 is that polypropylene adsorbs the cotton, and the outer wall of oil absorption layer 7 and the inner wall of PPR installing support 5 splice, and polypropylene adsorbs the cotton oil stain that can effectively be to the aquatic and intercepts, plays the effect of adsorbing the oil stain.
The even reservation of through-hole 8 is on the surface of PPR installing support 5, and through-hole 8 runs through PPR installing support 5, and the setting of through-hole 8 is conveniently cleared up to inhaling oil reservoir 7, and during the use, the squirt that can directly utilize the high strength directly clears up inhaling oil reservoir 7 through-hole 8, reaches the effect of clean oil absorption layer 7.
The invention also provides a manufacturing process of the high-strength modified plastic composite pipe, which comprises the following steps:
s1: adding the materials used for the first rigid layer 2 and the second rigid layer 3 into a wire drawing machine for heating and extrusion, and cutting and drawing the materials into wires for later use;
s2: manufacturing a needed PPR pipe 1 and a needed PPR mounting bracket 5 by using an extruder, and cooling for later use;
s3: punching the PPR mounting bracket 5 by using a punching machine;
s4: an oil absorption layer 7 made of polypropylene adsorption cotton is glued to the inner wall of the PPR mounting bracket 5;
s5: weaving a first rigid layer 2 and a second rigid layer 3 onto the PPR tube 1 with a circular knitting machine;
s6: and (3) loading the PPR mounting bracket 5 into the PPR pipe 1 to obtain a finished product.
It should be noted that, the PPR pipe 1 and the PPR mounting bracket 5 in the present invention are both formed by using an extruder, wherein the shape of the extruder head is consistent with the actual shape of the PPR pipe 1 and the actual shape of the PPR mounting bracket 5 when necessary, which is a known technology of the person skilled in the art, and the present invention is not described herein again.
According to the embodiment, the invention has the following specific beneficial effects:
this compound pipe of modified plastics of high strength possesses stronger rigidity, when using in chemical industry and life field, can effectively avoid tubular product to burst, also possesses the function of adsorbing the oil stain, and simultaneously, its inside detachable design also can effectively avoid tubular product to be blocked up, possesses good application prospect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a compound pipe of modified plastics of high strength which characterized in that: including PPR pipe (1), the surface coating of PPR pipe (1) has first rigid layer (2), and the parcel has second rigid layer (3) on first rigid layer (2), the internally mounted of PPR pipe (1) has PPR installing support (5), and reserves on the surface of PPR installing support (5) guide rail (6), reserve on the inner wall of PPR pipe (1) and have spout (4) unanimous with guide rail (6) quantity, and PPR installing support (5) pass through the cooperation of guide rail (6) and spout (4), constitute with PPR pipe (1) and dismantle mounting structure, it has through-hole (8) still to reserve on PPR installing support (5), and the internally mounted of PPR installing support (5) has oil absorption layer (7), it is fixed through the bonding process between PPR pipe (1), first rigid layer (2) and second rigid layer (3).
2. The high strength modified plastic composite pipe of claim 1, wherein: the materials of the first rigid layer (2) and the second rigid layer (3) are both copolymerized PP toughening modified materials.
3. A high strength modified plastic composite pipe according to claim 1 or 2, wherein: the first rigid layer (2) and the second rigid layer (3) are formed by cross weaving, and the cross weaving angle of the first rigid layer (2) and the second rigid layer (3) is 30-45 degrees.
4. The high strength modified plastic composite pipe of claim 1, wherein: the sliding groove (4) and the guide rail (6) are respectively provided with 4, and a gap is reserved between the sliding groove (4) and the guide rail (6).
5. The high strength modified plastic composite pipe of claim 1, wherein: the oil absorption layer (7) is made of polypropylene adsorption cotton, and the outer wall of the oil absorption layer (7) is glued with the inner wall of the PPR mounting bracket (5).
6. The high strength modified plastic composite pipe of claim 1, wherein: through-hole (8) even reservation is on the surface of PPR installing support (5), and through-hole (8) run through PPR installing support (5).
7. A process for manufacturing a high strength modified plastic composite pipe according to any one of claims 1 to 6, comprising the steps of:
s1: adding the materials used for the first rigid layer (2) and the second rigid layer (3) into a wire drawing machine, heating and extruding, and cutting and drawing into filaments for later use;
s2: manufacturing a needed PPR pipe (1) and a needed PPR mounting bracket (5) by using an extruder, and cooling for later use;
s3: punching the PPR mounting bracket (5) by using a punching machine;
s4: an oil absorption layer (7) made of polypropylene adsorption cotton is glued to the inner wall of the PPR mounting bracket (5);
s5: weaving a first rigid layer (2) and a second rigid layer (3) onto the PPR pipe (1) by using a circular weaving machine;
s6: and (3) loading the PPR mounting bracket (5) into the PPR pipe (1) to obtain a finished product.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911390017.1A CN113119532A (en) | 2019-12-30 | 2019-12-30 | High-strength modified plastic composite pipe and manufacturing process thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911390017.1A CN113119532A (en) | 2019-12-30 | 2019-12-30 | High-strength modified plastic composite pipe and manufacturing process thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
CN113119532A true CN113119532A (en) | 2021-07-16 |
Family
ID=76767522
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201911390017.1A Pending CN113119532A (en) | 2019-12-30 | 2019-12-30 | High-strength modified plastic composite pipe and manufacturing process thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113119532A (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002087869A2 (en) * | 2001-04-27 | 2002-11-07 | Fiberspar Corporation | Improved composite tubing |
KR20040102898A (en) * | 2003-05-30 | 2004-12-08 | 나상권 | Manufacturing of domestic sewage pipes and pipes with thermoplastic resins |
CN1730998A (en) * | 2005-08-12 | 2006-02-08 | 蔡海华 | Steel-plastic composite pipe with bridge type framework |
CN202327392U (en) * | 2011-11-23 | 2012-07-11 | 浙江伟星新型建材股份有限公司 | Plugging type fiber braided strap winding and reinforcing composite tube |
CN105508807A (en) * | 2016-02-03 | 2016-04-20 | 河北永正环保设备有限公司 | Reinforced thermoplastic composite pipe for non-excavation insertion and processing method thereof |
CN208268560U (en) * | 2018-06-07 | 2018-12-21 | 福建亚通新材料科技股份有限公司 | A kind of hot and cold water PA tube facilitating installation |
-
2019
- 2019-12-30 CN CN201911390017.1A patent/CN113119532A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002087869A2 (en) * | 2001-04-27 | 2002-11-07 | Fiberspar Corporation | Improved composite tubing |
KR20040102898A (en) * | 2003-05-30 | 2004-12-08 | 나상권 | Manufacturing of domestic sewage pipes and pipes with thermoplastic resins |
CN1730998A (en) * | 2005-08-12 | 2006-02-08 | 蔡海华 | Steel-plastic composite pipe with bridge type framework |
CN202327392U (en) * | 2011-11-23 | 2012-07-11 | 浙江伟星新型建材股份有限公司 | Plugging type fiber braided strap winding and reinforcing composite tube |
CN105508807A (en) * | 2016-02-03 | 2016-04-20 | 河北永正环保设备有限公司 | Reinforced thermoplastic composite pipe for non-excavation insertion and processing method thereof |
CN208268560U (en) * | 2018-06-07 | 2018-12-21 | 福建亚通新材料科技股份有限公司 | A kind of hot and cold water PA tube facilitating installation |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN110131487B (en) | Glass fiber PE composite belt reinforced PVC composite pipeline and preparation method thereof | |
CN108000831A (en) | A kind of steel mesh plastic composite pipe processing technology | |
GB2386935A (en) | Ducting with sound absorbing properties | |
CN201100489Y (en) | Polyethylene enhanced tube for fiber weaving enhanced belt | |
CN202082504U (en) | Fibre reinforced thermoplastic plastic pipe | |
CN113119532A (en) | High-strength modified plastic composite pipe and manufacturing process thereof | |
CN102155590A (en) | Steel reinforced poly ethylene (PE) corrugated pipe and manufacturing equipment thereof | |
CN101956877A (en) | Vehicle high-pressure power steering rubber tube and preparation method thereof | |
CN105538678B (en) | A kind of production equipment of winding pipe | |
CN101737570B (en) | Glass fiber and polyethylene composite reinforced polyethylene spirally enwound structure-wall tubular product | |
CN205618843U (en) | Compound pipe of fine winding of polyethylene glass | |
CN102052526A (en) | Double-wall corrugated pipe formed through winding and provided with metal framework reinforcement and manufacturing method thereof | |
CN207121680U (en) | Antibacterial denim fabric | |
CN202140701U (en) | Water delivery pipe and belt materials and device for manufacturing water delivery pipe | |
CN202215862U (en) | Reinforced composite heat preservation thermal insulation ultrahigh molecular weight polyethylene pipe | |
CN108036119A (en) | A kind of new steel mesh plastic composite pipe | |
CN101555965A (en) | Three-layer tetrafluoroethylene resin film-wound fuel hose and manufacturing method thereof | |
CN102707399B (en) | Central bundle tubular optical cable with special-shaped reinforcement pieces | |
CN211059519U (en) | High-strength flame-retardant carat pipe | |
CN203273060U (en) | Double-layer co-extrusion polyethylene winding structure wall tube and production equipment thereof | |
CN201462221U (en) | Wax precipitation prevention composite piping for oilfield | |
CN217081732U (en) | Double-layer ground heating pipe with sandwiched steel wire mesh | |
DE202015104169U1 (en) | Multilayer hose | |
WO2008096740A1 (en) | Flow passage forming body | |
CN221463139U (en) | Composite single-wall corrugated ribbed pipe, carat pipe and production system thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210716 |
|
RJ01 | Rejection of invention patent application after publication |