CN112277429A - Bonding method for multilayer composite pipeline - Google Patents
Bonding method for multilayer composite pipeline Download PDFInfo
- Publication number
- CN112277429A CN112277429A CN202011224258.1A CN202011224258A CN112277429A CN 112277429 A CN112277429 A CN 112277429A CN 202011224258 A CN202011224258 A CN 202011224258A CN 112277429 A CN112277429 A CN 112277429A
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- China
- Prior art keywords
- pipe
- polyvinylidene fluoride
- polyethylene
- wall
- temperature
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Classifications
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- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
-
- 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 general shape other than plane
- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/162—Cleaning
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
Abstract
The invention discloses a bonding method for a multilayer composite pipeline, which comprises the following steps: s101: selecting polyvinylidene fluoride pipes and polyethylene pipes with the same length; s102: selecting a supporting steel pipe; s103: roughening the outer wall of the polyvinylidene fluoride pipe by using a grinding wheel; s104: roughening the inner wall of the polyethylene pipe by using a polishing rod to roughen the inner wall of the polyethylene pipe; s106: closely connecting the polyethylene pipe and the polyvinylidene fluoride pipe together through a high-temperature-resistant adhesive to obtain the multilayer composite pipeline; according to the invention, the polyethylene pipe and the polyvinylidene fluoride pipe are tightly connected together through the high-temperature-resistant adhesive by a scientific and reasonable bonding method to form the multilayer composite pipeline, the multilayer composite pipeline not only has the corrosion resistance and high-temperature resistance of the polyvinylidene fluoride pipe, but also saves the cost by adopting the polyethylene pipe outside the polyvinylidene fluoride pipe, thereby improving the economic benefit of the multilayer composite pipeline.
Description
Technical Field
The invention relates to the technical field of composite pipeline bonding, in particular to a bonding method for a multilayer composite pipeline.
Background
PVDF (polyvinylidene fluoride) tubes (polyvinylidene fluoride tubes) are tightly arranged among molecular chains, have strong hydrogen bonds, are inherently flame-retardant, have the crystallinity of 65-78 percent and are used at the temperature of-40-150 ℃ for a long time. The special-purpose radiation-proof coating has the outstanding characteristics of high mechanical strength and good radiation resistance, can be used outdoors for a long time, and does not need maintenance. Has good chemical stability, is not corroded by acid, alkali, strong oxidant and halogen at room temperature, and is widely applied to the acid washing of petrochemical industry, electronic and electric industry and steel mills and the conveying of acid and alkali liquor.
PE is polyethylene plastic, the most basic plastic, plastic bags, preservative films and the like are PE, and HDPE is a nonpolar thermoplastic resin with high crystallinity. The appearance of the original HDPE is milky white, and the micro-thin section is semitransparent to a certain degree. PE has excellent resistance to most domestic and industrial chemicals.
The PVDF pipe is higher than the plastic PE pipe in performance in all aspects, but is expensive, the plastic PE pipe is 8000 yuan/ton, but the PVDF pipe is 20 ten thousand yuan/ton, in order to save cost and ensure the performance of the PVDF pipe, the PE pipe and the PVDF pipe are combined together to form the multilayer composite pipe, the inner layer of the pipe is the PVDF pipe (has excellent corrosion resistance and high temperature resistance), and the outer layer is the PE pipe.
Disclosure of Invention
The present invention is directed to a bonding method for multi-layer composite pipes, which solves the above-mentioned problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a bonding method for a multilayer composite pipe, the method comprising:
s101: selecting polyvinylidene fluoride tubes and polyethylene tubes with the same length, cleaning the outer walls and the inner walls of the selected polyvinylidene fluoride tubes and polyethylene tubes, and then blowing the cleaned polyvinylidene fluoride tubes and the outer walls and the inner walls of the polyethylene tubes by using a blower for drying for subsequent use;
s102: selecting a support steel pipe, cleaning the outer wall of the support steel pipe, drying the cleaned outer wall of the support steel pipe by using a blower, and fixing the support steel pipe on a vertical surface;
s103: sleeving the cleaned polyvinylidene fluoride pipe on a supporting steel pipe, fixing the polyvinylidene fluoride pipe by a user, and roughening the outer wall of the polyvinylidene fluoride pipe by using a grinding wheel to roughen the outer wall of the polyvinylidene fluoride pipe;
s104: roughening the inner wall of the polyethylene pipe by using a polishing rod to roughen the inner wall of the polyethylene pipe;
s105: uniformly coating a high-temperature adhesive on the outer wall of the polyvinylidene fluoride pipe, simultaneously uniformly coating a high-temperature adhesive on the inner wall of the polyethylene pipe, and then sleeving the polyethylene pipe coated with the high-temperature adhesive on the outer wall of the polyvinylidene fluoride pipe;
s106: then insert the heating rod in the support steel pipe, carry out heat treatment to polyvinylidene fluoride pipe through the support steel pipe, thereby improve the temperature between polyvinylidene fluoride pipe and the polyethylene pipe junction, extrude polyethylene pipe and polyvinylidene fluoride pipe at polyethylene tub of outer wall simultaneously, treat to heat 18 ~ 20 minutes after, continue to extrude 5 ~ 8 minutes, then get rid of external force and extrude, after polyethylene pipe and polyvinylidene fluoride pipe resume the room temperature, take off polyethylene pipe and polyvinylidene fluoride pipe from the support steel pipe, through high temperature resistant adhesive with polyethylene pipe and polyvinylidene fluoride pipe zonulae occludens together, thereby obtain this multilayer composite conduit.
Wherein the output temperature of the blower is 30-40 ℃, and the air speed of the blower is 20 m/s.
The length of the support steel pipe is larger than that of the polyvinylidene fluoride pipe, and the outer diameter of the cross section of the support steel pipe is smaller than the inner diameter of the cross section of the polyvinylidene fluoride pipe.
Wherein the outer diameter of the section of the polyvinylidene fluoride pipe is smaller than the inner diameter of the section of the polyethylene pipe.
Wherein the outer diameter of the cross section of the polyvinylidene fluoride pipe is smaller than the inner diameter of the cross section of the polyethylene pipe by 3 mm.
The thickness of the high-temperature-resistant adhesive coated on the outer wall of the polyvinylidene fluoride pipe is 2mm, and the thickness of the high-temperature-resistant adhesive coated on the inner wall of the polyethylene pipe is 2 mm.
Wherein the high-temperature-resistant adhesive is prepared from epoxy resin AB adhesive.
Wherein the heating temperature of the heating rod is 150 ℃.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the polyethylene pipe and the polyvinylidene fluoride pipe are tightly connected together through the high-temperature-resistant adhesive by a scientific and reasonable bonding method to form the multilayer composite pipeline, the multilayer composite pipeline not only has the corrosion resistance and high-temperature resistance of the polyvinylidene fluoride pipe, but also saves the cost by adopting the polyethylene pipe outside the polyvinylidene fluoride pipe, thereby improving the economic benefit of the multilayer composite pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.
In an embodiment, the present invention provides a technical solution: a bonding method for a multilayer composite pipe, the method comprising:
s101: selecting polyvinylidene fluoride tubes and polyethylene tubes with the same length, cleaning the outer walls and the inner walls of the selected polyvinylidene fluoride tubes and polyethylene tubes, and then blowing the cleaned polyvinylidene fluoride tubes and the outer walls and the inner walls of the polyethylene tubes by using a blower for drying for subsequent use;
s102: selecting a support steel pipe, cleaning the outer wall of the support steel pipe, drying the cleaned outer wall of the support steel pipe by using a blower, and fixing the support steel pipe on a vertical surface;
s103: sleeving the cleaned polyvinylidene fluoride pipe on a supporting steel pipe, fixing the polyvinylidene fluoride pipe by a user, and roughening the outer wall of the polyvinylidene fluoride pipe by using a grinding wheel to roughen the outer wall of the polyvinylidene fluoride pipe;
s104: roughening the inner wall of the polyethylene pipe by using a polishing rod to roughen the inner wall of the polyethylene pipe;
s105: uniformly coating a high-temperature adhesive on the outer wall of the polyvinylidene fluoride pipe, simultaneously uniformly coating a high-temperature adhesive on the inner wall of the polyethylene pipe, and then sleeving the polyethylene pipe coated with the high-temperature adhesive on the outer wall of the polyvinylidene fluoride pipe;
s106: then insert the heating rod in the support steel pipe, carry out heat treatment to polyvinylidene fluoride pipe through the support steel pipe, thereby improve the temperature between polyvinylidene fluoride pipe and the polyethylene pipe junction, extrude polyethylene pipe and polyvinylidene fluoride pipe at polyethylene tub of outer wall simultaneously, treat to heat 18 ~ 20 minutes after, continue to extrude 5 ~ 8 minutes, then get rid of external force and extrude, after polyethylene pipe and polyvinylidene fluoride pipe resume the room temperature, take off polyethylene pipe and polyvinylidene fluoride pipe from the support steel pipe, through high temperature resistant adhesive with polyethylene pipe and polyvinylidene fluoride pipe zonulae occludens together, thereby obtain this multilayer composite conduit.
Wherein, the outer wall of polyvinylidene fluoride pipe and the inner wall of polyethylene pipe are beaten the hair and are handled, can increase the frictional force between the outer wall of high temperature resistant adhesive and polyvinylidene fluoride pipe and the inner wall of polyethylene pipe, have increased bonding strength, and when using the heating rod heating, the burr that the outer wall of polyvinylidene fluoride pipe and the inner wall of polyethylene pipe beaten the hair and produce can soften simultaneously, then high temperature resistant adhesive parcel live these burrs to the bonding strength between polyethylene pipe and the polyvinylidene fluoride pipe has been increased.
In the steps S101 and S102, the output temperature of a blower is 30-40 ℃, the air speed of the blower is 20 m/S, and the cleaned polyvinylidene fluoride tube and the polyethylene tube are dried by the blower, so that the surfaces of the polyvinylidene fluoride tube and the polyethylene tube are prevented from being deformed due to overhigh temperature.
In step S102, the length of the support steel pipe is greater than the length of the polyvinylidene fluoride pipe, and the outer diameter of the cross section of the support steel pipe is less than the inner diameter of the cross section of the polyvinylidene fluoride pipe.
Wherein the outer diameter of the section of the polyvinylidene fluoride pipe is smaller than the inner diameter of the section of the polyethylene pipe.
Wherein the outer diameter of the section of the polyvinylidene fluoride pipe is 3mm smaller than the inner diameter of the section of the polyethylene pipe.
In the step S105, the thickness of the high-temperature-resistant adhesive coated on the outer wall of the polyvinylidene fluoride pipe is 2mm, and the thickness of the high-temperature-resistant adhesive coated on the inner wall of the polyethylene pipe is 2 mm.
In step S105, the high temperature resistant adhesive is made of epoxy resin AB glue.
In step S106, the heating temperature of the heating rod is 150 ℃.
In conclusion, the polyethylene pipe and the polyvinylidene fluoride pipe are tightly connected together through the high-temperature-resistant adhesive by a scientific and reasonable bonding method to form the multilayer composite pipeline, the multilayer composite pipeline not only has the corrosion resistance and high-temperature resistance of the polyvinylidene fluoride pipe, but also saves the cost by adopting the polyethylene pipe outside the polyvinylidene fluoride pipe, thereby improving the economic benefit of the multilayer composite pipeline.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (8)
1. A bonding method for a multilayer composite pipe, the method comprising:
s101: selecting polyvinylidene fluoride tubes and polyethylene tubes with the same length, cleaning the outer walls and the inner walls of the selected polyvinylidene fluoride tubes and polyethylene tubes, and then blowing the cleaned polyvinylidene fluoride tubes and the outer walls and the inner walls of the polyethylene tubes by using a blower for drying for subsequent use;
s102: selecting a support steel pipe, cleaning the outer wall of the support steel pipe, drying the cleaned outer wall of the support steel pipe by using a blower, and fixing the support steel pipe on a vertical surface;
s103: sleeving the cleaned polyvinylidene fluoride pipe on a supporting steel pipe, fixing the polyvinylidene fluoride pipe by a user, and roughening the outer wall of the polyvinylidene fluoride pipe by using a grinding wheel to roughen the outer wall of the polyvinylidene fluoride pipe;
s104: roughening the inner wall of the polyethylene pipe by using a polishing rod to roughen the inner wall of the polyethylene pipe;
s105: uniformly coating a high-temperature adhesive on the outer wall of the polyvinylidene fluoride pipe, simultaneously uniformly coating a high-temperature adhesive on the inner wall of the polyethylene pipe, and then sleeving the polyethylene pipe coated with the high-temperature adhesive on the outer wall of the polyvinylidene fluoride pipe;
s106: then insert the heating rod in the support steel pipe, carry out heat treatment to polyvinylidene fluoride pipe through the support steel pipe, thereby improve the temperature between polyvinylidene fluoride pipe and the polyethylene pipe junction, extrude polyethylene pipe and polyvinylidene fluoride pipe at polyethylene tub of outer wall simultaneously, treat to heat 18 ~ 20 minutes after, continue to extrude 5 ~ 8 minutes, then get rid of external force and extrude, after polyethylene pipe and polyvinylidene fluoride pipe resume the room temperature, take off polyethylene pipe and polyvinylidene fluoride pipe from the support steel pipe, through high temperature resistant adhesive with polyethylene pipe and polyvinylidene fluoride pipe zonulae occludens together, thereby obtain this multilayer composite conduit.
2. A bonding method for multilayer composite pipes according to claim 1, characterized in that: the output temperature of the blower is 30-40 ℃, and the air speed of the blower is 20 m/s.
3. A bonding method for multilayer composite pipes according to claim 1, characterized in that: the length dimension of the support steel pipe is larger than that of the polyvinylidene fluoride pipe, and the outer diameter dimension of the cross section of the support steel pipe is smaller than the inner diameter dimension of the cross section of the polyvinylidene fluoride pipe.
4. A bonding method for multilayer composite pipes according to claim 1, characterized in that: the outer diameter of the section of the polyvinylidene fluoride pipe is smaller than the inner diameter of the section of the polyethylene pipe.
5. A bonding method for multilayer composite pipes according to claim 1, characterized in that: the outer diameter of the section of the polyvinylidene fluoride pipe is smaller than the inner diameter of the section of the polyethylene pipe by 3 mm.
6. A bonding method for multilayer composite pipes according to claim 1, characterized in that: the thickness dimension of the high-temperature-resistant adhesive smeared on the outer wall of the polyvinylidene fluoride pipe is 2mm, and the thickness dimension of the high-temperature-resistant adhesive smeared on the inner wall of the polyethylene pipe is 2 mm.
7. A bonding method for multilayer composite pipes according to claim 1, characterized in that: the high-temperature-resistant adhesive is made of epoxy resin AB adhesive.
8. A bonding method for multilayer composite pipes according to claim 1, characterized in that: the heating temperature of the heating rod is 150 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011224258.1A CN112277429A (en) | 2020-11-05 | 2020-11-05 | Bonding method for multilayer composite pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011224258.1A CN112277429A (en) | 2020-11-05 | 2020-11-05 | Bonding method for multilayer composite pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN112277429A true CN112277429A (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011224258.1A Pending CN112277429A (en) | 2020-11-05 | 2020-11-05 | Bonding method for multilayer composite pipeline |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253320A (en) * | 2018-08-23 | 2019-01-22 | 浙江巨化新材料研究院有限公司 | A kind of MULTILAYER COMPOSITE tubing and preparation method thereof |
| CN109707922A (en) * | 2019-01-23 | 2019-05-03 | 浙江富华新材料科技有限公司 | A kind of lightweight braided water pipe of anti-twisting and production procedure |
| CN208967262U (en) * | 2018-08-28 | 2019-06-11 | 河北恒安泰油管有限公司 | A kind of adhered flexible composite pipe |
| CN110466179A (en) * | 2019-07-08 | 2019-11-19 | 浙江伟星新型建材股份有限公司 | A kind of preparation method of ant-scaling enhancing thermoplastic composite tube |
| CN111571973A (en) * | 2020-05-23 | 2020-08-25 | 咸阳新德安新材料科技有限公司 | Processing technology of polyvinylidene fluoride flexible composite high-pressure pipe |
-
2020
- 2020-11-05 CN CN202011224258.1A patent/CN112277429A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253320A (en) * | 2018-08-23 | 2019-01-22 | 浙江巨化新材料研究院有限公司 | A kind of MULTILAYER COMPOSITE tubing and preparation method thereof |
| CN208967262U (en) * | 2018-08-28 | 2019-06-11 | 河北恒安泰油管有限公司 | A kind of adhered flexible composite pipe |
| CN109707922A (en) * | 2019-01-23 | 2019-05-03 | 浙江富华新材料科技有限公司 | A kind of lightweight braided water pipe of anti-twisting and production procedure |
| CN110466179A (en) * | 2019-07-08 | 2019-11-19 | 浙江伟星新型建材股份有限公司 | A kind of preparation method of ant-scaling enhancing thermoplastic composite tube |
| CN111571973A (en) * | 2020-05-23 | 2020-08-25 | 咸阳新德安新材料科技有限公司 | Processing technology of polyvinylidene fluoride flexible composite high-pressure pipe |
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Application publication date: 20210129 |