CN109233147A - A kind of carbon fiber modifying bellows and preparation method thereof - Google Patents
A kind of carbon fiber modifying bellows and preparation method thereof Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses a kind of carbon fiber modifying bellowss, are made of the raw material of following parts by weight: 28~45 parts of modified PVC resin, 10~27 parts of acrylic resin, 5~15 parts of carbon fiber, 15~30 parts of straw powder, 7~12 parts of toughener, 1~3 part of Ca-Zn composite heat stabilizer, rare-earth coupling agent activate 0.5~2 part of vermiculite, 0.1~1.5 part of sodium carboxymethylcellulose, 1.5~3.5 parts of plasticizer, 1~2.7 part of molybdenum disulfide, 5~10 parts of nanometer calcium carbonate.The present invention provides a kind of bellows that can be greatly enhanced using same materials but ring stiffness, and the bellows can waterproof and anticorrosion, it is economic and environment-friendly, cheap.
Description
Technical field
The present invention relates to bellows manufacturing technology field, in particular to a kind of carbon fiber modifying bellows and its preparation side
Method.
Background technique
Bellows is a kind of wavy tubing of shape rule, mainly include metal bellows and plastic film capicitor,
Real plastic film capicitor has irreplaceable role in fields such as medium conveying, electric power threading.It is wherein most widely used just
It is because the cable of power transmission needs to guarantee its higher safety, but to work as in terms of electric power threading and be mounted on the external world
Perhaps the fault for being led to that electric leakage power-off occurs by the corrosion of air or the pollution of water is easy when underground, to safety
Performance affects, thus in cable transmission would generally use bellows cable is protected, prevent its by
The invasion of sunlight, moisture content, pest, but in use, it is often first that bellows is fixed-type, then cable is put in
It is dragged in bellows, until forgetting about it needs place to be mounted, will lead to the abrasion of ripple inside pipe wall in this way, to make ripple
The shape and service life of pipe are affected, and because bellows is filled when protecting cable in underground, are come from
The extruding of the pressure and surrounding on ground is easy to appear aging ring stiffness and not enough fractures and lose the protection to internal wire, causes
The service life of bellows substantially reduces, but to increase the intensity of bellows, generally requires addition reinforcing material or addition
Reinforcing agent will lead to increased costs.
Summary of the invention
It is an object of the invention to: in view of the above problems, provide a kind of using same materials but ring stiffness can be big
The bellows enhanced greatly, and the bellows can waterproof and anticorrosion, it is economic and environment-friendly, cheap.
In order to achieve the above-mentioned object of the invention, The technical solution adopted by the invention is as follows:
A kind of carbon fiber modifying bellows, is made of the raw material of following parts by weight: modified PVC resin 28~45
Part, 10~27 parts of acrylic resin, 5~15 parts of carbon fiber, 15~30 parts of straw powder, 7~12 parts of toughener, Ca Zn composite heat are steady
Determine 1~3 part of agent, rare-earth coupling agent activation 0.5~2 part of vermiculite, 0.1~1.5 part of sodium carboxymethylcellulose, plasticizer 1.5~3.5
Part, 1~2.7 part of molybdenum disulfide, 5~10 parts of nanometer calcium carbonate.
Further, the toughener is by haloflex and the resin modified polyvinyl chloride of MBS, method of modifying
It is that haloflex and MBS resin are added in polyvinyl chloride to carry out blending and modifying at 85~95 DEG C.
Further, the parts by weight of each raw material are as follows in the toughener: 3~7 parts of haloflex, MBS resin 3~
8 parts, 8~15 parts of polyvinyl chloride.
Further, the phosphorus content of the carbon fiber is 98% or more, and mesh number is 300~400 mesh.
Further, the plasticizer is methyl methacrylate-acrylate copolymer, and the degree of polymerization of the copolymer is big
In 95%.
Further, the preparation method of the carbon fiber modifying bellows includes the following steps:
(1) pretreatment of raw material: using two-stage pulsed pneumatic drying for straw powder, is carrying out high temperature drying, is being cooled to room temperature
After being sufficiently mixed afterwards with carbon fiber, acrylic resin is added and carries out heating blending and modifying, is wrapped in carbon fiber and straw powder poly-
In allyl resin, modified polypropylene resin is obtained；
(2) hybrid heating device Hybrid Heating: is added in modified polypropylene resin obtained in step (1) and other raw materials
In mixed well and stirring accelerated to carry out self-heating after, mixed raw material is put into storage silo to be cooled to proper temperature standby
With；
(3) extrusion molding: the mixture in step (2) is added in extruder after heating pressurization squeezes out and is directly entered heating
Mold molding afterwards, then be flared to obtain bellows；
(4) in the outside spraying corrosion resistant coating of bellows, bellows finished product spraying drying: is obtained after drying.
Further, in step (1), the high temperature drying is that 2~4h of drying, the blending change at 135~150 DEG C
Property temperature be 160~168 DEG C.
Further, in step (2), the mixing speed for accelerating stirring self-heating is 300~400r/min, is heated to
Temperature is 130~140 DEG C, and the proper temperature is 60~70 DEG C.
Further, in step (3), the heating temperature is 190~210 DEG C, the pressure of the pressurization is 13~
15MPa, the temperature of the mold is 200~220 DEG C, and the temperature of mold is kept above 3~5 DEG C of extruder temperature.
Further, in step (3), the corrugated cross-section of the bellows obtained after the mold molding is with rounded corners
It is trapezoidal.
In conclusion by adopting the above-described technical solution, having the advantage that
(1) carbon fiber modifying bellows disclosed in the present invention joined carbon fiber and straw powder, and carbon fiber can increase greatly
The intensity and rigidity of strong bellows, straw powder can then greatly save cost, first by carbon fiber during preparing bellows
With straw powder and it is polypropene blended after, then remaining other raw material is subjected to heating blending, facilitates carbon fiber and straw powder abundant
For Dispersion Fusion into polyvinyl chloride, raw material, which is first carried out preheating, before being squeezed out heats the molecule in raw material in enlivening shape
State, it is that raw material is in a kind of readiness that it is spare, which to be cooled to certain temperature, and so that it will not enter in extruder by moment
High temperature after cataclysm or other adverse effects are generated inside raw material, the corrugated cross-section of the bellows prepared in the present invention is circle
The trapezoidal bellows with traditional semi-circular cross-section in angle is compared, and the ring stiffness of the bellows prepared under same raw material is higher,
Intensity is more preferable.
(2) toughener can be significantly using haloflex and the resin modified polyvinyl chloride of MBS in the formula in the present invention
Improve the shock resistance of product and improve the toughness of product, heat stabilizer is added, coupling agent and sodium carboxymethylcellulose can be with
Making plastics, the interior plasticizing of 1 hour is not decomposed at high temperature, allows the inorganic matters such as calcium carbonate, carbon fiber preferably in conjunction with plastic molecules
And filling；Plasticizer is the fusion time that methyl methacrylate-acrylate copolymer can be used for shortening plastics, is accelerated molten
Melt, promote plasticizing, while preferably improving the glossiness of product.
(3) technical operation in the present invention is simple, producing cost relative moderate, and recycling is quick, and the time is short, is applicable in
Produce in enormous quantities, also avoids the pollution to environment.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, preferred embodiment is enumerated below, to this hair
Bright further description.However, it is necessary to illustrate, many details listed in specification are used for the purpose of making reader to this
The one or more aspects of invention have a thorough explanation, also may be implemented even without these specific details of the invention
These aspects.
Embodiment 1
A kind of carbon fiber modifying bellows, is made of the raw material of following parts by weight: 28 parts of modified PVC resin gathers
10 parts of allyl resin, 5 parts of carbon fiber, 15 parts of straw powder, 7 parts of toughener, 1 part of Ca-Zn composite heat stabilizer, rare-earth coupling agent are living
Change 0.5 part of vermiculite, 0.1 part of sodium carboxymethylcellulose, 1.5 parts of plasticizer, 1 part of molybdenum disulfide, 5 parts of nanometer calcium carbonate.
Toughener is by haloflex and the resin modified polyvinyl chloride of MBS, and method of modifying is by chlorinated polyethylene
Alkene and MBS resin are added in polyvinyl chloride carries out blending and modifying at 85 DEG C；The parts by weight of each raw material are as follows in toughener: chlorine
Change 3 parts of polyethylene, 3 parts of MBS resin, 8 parts of polyvinyl chloride；The phosphorus content of carbon fiber is 98% or more, and mesh number is 300 mesh；Increase
Modeling agent is methyl methacrylate-acrylate copolymer, and the degree of polymerization of the copolymer is greater than 95%.
Embodiment 2
A kind of carbon fiber modifying bellows, is made of the raw material of following parts by weight: 45 parts of modified PVC resin gathers
27 parts of allyl resin, 15 parts of carbon fiber, 30 parts of straw powder, 12 parts of toughener, 3 parts of Ca-Zn composite heat stabilizer, rare-earth coupling agent are living
Change 2 parts of vermiculite, 1.5 parts of sodium carboxymethylcellulose, 3.5 parts of plasticizer, 2.7 parts of molybdenum disulfide, 10 parts of nanometer calcium carbonate.
Toughener is by haloflex and the resin modified polyvinyl chloride of MBS, and method of modifying is by chlorinated polyethylene
Alkene and MBS resin are added in polyvinyl chloride carries out blending and modifying at 95 DEG C；The parts by weight of each raw material are as follows in toughener: chlorine
Change 7 parts of polyethylene, 8 parts of MBS resin, 15 parts of polyvinyl chloride；The phosphorus content of carbon fiber is 98% or more, and mesh number is 400 mesh；Increase
Modeling agent is methyl methacrylate-acrylate copolymer, and the degree of polymerization of the copolymer is greater than 95%.
Embodiment 3
A kind of carbon fiber modifying bellows, is made of the raw material of following parts by weight: 35 parts of modified PVC resin gathers
20 parts of allyl resin, 10 parts of carbon fiber, 22 parts of straw powder, 10 parts of toughener, 2 parts of Ca-Zn composite heat stabilizer, rare-earth coupling agent
Activate 1.5 parts of vermiculite, 1 part of sodium carboxymethylcellulose, 2.2 parts of plasticizer, 2.0 parts of molybdenum disulfide, 8 parts of nanometer calcium carbonate.
Toughener is by haloflex and the resin modified polyvinyl chloride of MBS, and method of modifying is by chlorinated polyethylene
Alkene and MBS resin are added in polyvinyl chloride carries out blending and modifying at 90 DEG C；The parts by weight of each raw material are as follows in toughener: chlorine
Change 5 parts of polyethylene, 6 parts of MBS resin, 12 parts of polyvinyl chloride；The phosphorus content of carbon fiber is 98% or more, and mesh number is 350 mesh；Increase
Modeling agent is methyl methacrylate-acrylate copolymer, and the degree of polymerization of the copolymer is greater than 95%.
Embodiment 4
A kind of preparation method of carbon fiber modifying bellows includes the following steps:
(1) pretreatment of raw material: using two-stage pulsed pneumatic drying for straw powder, and 2h is dried at 135 DEG C and is sufficiently dried
Dry, after being sufficiently mixed after being cooled to room temperature with carbon fiber, addition acrylic resin carries out being heated to 160 DEG C of blending and modifyings, makes carbon
Fiber and straw powder are wrapped in acrylic resin, obtain modified polypropylene resin；
(2) hybrid heating device Hybrid Heating: is added in modified polypropylene resin obtained in step (1) and other raw materials
It is middle mixed well and with the revolving speed of 300r/min stir carry out self-heating after, be heated to temperature be 130 DEG C, by mixed original
Material be put into storage silo be cooled to appropriate 60 DEG C it is spare；
(3) extrusion molding: the mixture in step (2) is added in extruder after heating pressurization squeezes out and is directly entered heating
Mold molding afterwards, then be flared to obtain bellows, the heating temperature is 190 DEG C, and the pressure of the pressurization is 13MPa, described
The temperature of mold is 200 DEG C, and the temperature of mold is kept above 3~5 DEG C of extruder temperature, the bellows obtained after mold molding
Corrugated cross-section be it is with rounded corners trapezoidal.
(4) in the outside spraying corrosion resistant coating of bellows, bellows finished product spraying drying: is obtained after drying.
Embodiment 5
A kind of preparation method of carbon fiber modifying bellows includes the following steps:
(1) pretreatment of raw material: using two-stage pulsed pneumatic drying for straw powder, and 4h is dried at 150 DEG C and is sufficiently dried
Dry, after being sufficiently mixed after being cooled to room temperature with carbon fiber, addition acrylic resin carries out being heated to 168 DEG C of blending and modifyings, makes carbon
Fiber and straw powder are wrapped in acrylic resin, obtain modified polypropylene resin；
(2) hybrid heating device Hybrid Heating: is added in modified polypropylene resin obtained in step (1) and other raw materials
It is middle mixed well and with the revolving speed of 400r/min stir carry out self-heating after, be heated to temperature be 140 DEG C, by mixed original
Material be put into storage silo be cooled to appropriate 70 DEG C it is spare；
(3) extrusion molding: the mixture in step (2) is added in extruder after heating pressurization squeezes out and is directly entered heating
Mold molding afterwards, then be flared to obtain bellows, the heating temperature is 210 DEG C, and the pressure of the pressurization is 15MPa, described
The temperature of mold is 220 DEG C, and the temperature of mold is kept above 5 DEG C of extruder temperature, the bellows obtained after mold molding
Corrugated cross-section is with rounded corners trapezoidal.
(4) in the outside spraying corrosion resistant coating of bellows, bellows finished product spraying drying: is obtained after drying.
Embodiment 6
A kind of preparation method of carbon fiber modifying bellows includes the following steps:
(1) pretreatment of raw material: using two-stage pulsed pneumatic drying for straw powder, and 3h is dried at 140 DEG C and is sufficiently dried
Dry, after being sufficiently mixed after being cooled to room temperature with carbon fiber, addition acrylic resin carries out being heated to 165 DEG C of blending and modifyings, makes carbon
Fiber and straw powder are wrapped in acrylic resin, obtain modified polypropylene resin；
(2) hybrid heating device Hybrid Heating: is added in modified polypropylene resin obtained in step (1) and other raw materials
It is middle mixed well and with the revolving speed of 350r/min stir carry out self-heating after, be heated to temperature be 135 DEG C, by mixed original
Material be put into storage silo be cooled to appropriate 65 DEG C it is spare；
(3) extrusion molding: the mixture in step (2) is added in extruder after heating pressurization squeezes out and is directly entered heating
Mold molding afterwards, then be flared to obtain bellows, the heating temperature is 200 DEG C, and the pressure of the pressurization is 14MPa, described
The temperature of mold is 210 DEG C, and the temperature of mold is kept above 4 DEG C of extruder temperature, the bellows obtained after mold molding
Corrugated cross-section is with rounded corners trapezoidal.
(4) in the outside spraying corrosion resistant coating of bellows, bellows finished product spraying drying: is obtained after drying.
Embodiment 7
A kind of preparation method of carbon fiber modifying bellows includes the following steps:
(1) pretreatment of raw material: using two-stage pulsed pneumatic drying for straw powder, and 3h is dried at 145 DEG C and is sufficiently dried
Dry, after being sufficiently mixed after being cooled to room temperature with carbon fiber, addition acrylic resin carries out being heated to 165 DEG C of blending and modifyings, makes carbon
Fiber and straw powder are wrapped in acrylic resin, obtain modified polypropylene resin；
(2) hybrid heating device Hybrid Heating: is added in modified polypropylene resin obtained in step (1) and other raw materials
It is middle mixed well and with the revolving speed of 380r/min stir carry out self-heating after, be heated to temperature be 135 DEG C, by mixed original
Material be put into storage silo be cooled to appropriate 65 DEG C it is spare；
(3) extrusion molding: the mixture in step (2) is added in extruder after heating pressurization squeezes out and is directly entered heating
Mold molding afterwards, then be flared to obtain bellows, the heating temperature is 205 DEG C, and the pressure of the pressurization is 14MPa, described
The temperature of mold is 210 DEG C, and the temperature of mold is kept above 5 DEG C of extruder temperature, the bellows obtained after mold molding
Corrugated cross-section is with rounded corners trapezoidal.
(4) in the outside spraying corrosion resistant coating of bellows, bellows finished product spraying drying: is obtained after drying.
Embodiment 8
In the present embodiment, the corrugated cross-section of the bellows obtained after mold molding is semicircle, and integral manufacturing uses
Raw material amount it is consistent with other embodiments, remaining embodiment and embodiment 8 are consistent.
It is as shown in the table that the bellows of preparation in embodiment 4~8 is subjected to performance detection:
From the above data, prepared bellows has good impact property according to the present invention, while by wave
Adding straw powder and carbon fiber in line pipe and adding the hosts such as toughener assists each raw material to merge so that the carbon fiber modifying prepared
Bellows has preferable rigidity, ring stiffness and ring flexible, and resists compacted performance strong, in the long-term use process will not be because attaching most importance to
Power deforms to influence the service life of product, while production cost is low, producing cost relative moderate, is applicable in and produces in enormous quantities,
And the change of ripple cross-sectional shape also greatly strengthens the ring rigidity of bellows in bellows.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of carbon fiber modifying bellows, it is characterised in that: be made of the raw material of following parts by weight: modified polyvinyl chloride tree
28~45 parts of rouge, 10~27 parts of acrylic resin, 5~15 parts of carbon fiber, 15~30 parts of straw powder, 7~12 parts of toughener, calcium zinc
1~3 part of composite thermal stabilizer, rare-earth coupling agent activate 0.5~2 part of vermiculite, 0.1~1.5 part of sodium carboxymethylcellulose, plasticizer
1.5~3.5 parts, 1~2.7 part of molybdenum disulfide, 5~10 parts of nanometer calcium carbonate.
2. a kind of carbon fiber modifying bellows according to claim 1, it is characterised in that: the toughener is through superchlorination
Polyethylene and the resin modified polyvinyl chloride of MBS, method of modifying are that haloflex and MBS resin are added in polyvinyl chloride
Blending and modifying is carried out at 85~95 DEG C.
3. a kind of carbon fiber modifying bellows according to claim 2, it is characterised in that: each raw material in the toughener
Parts by weight are as follows: 3~7 parts of haloflex, 3~8 parts of MBS resin, 8~15 parts of polyvinyl chloride.
4. a kind of carbon fiber modifying bellows according to claim 1, it is characterised in that: the phosphorus content of the carbon fiber is
98% or more, mesh number is 300~400 mesh.
5. a kind of carbon fiber modifying bellows according to claim 1, it is characterised in that: the plasticizer is metering system
The degree of polymerization of sour methyl esters-acrylate copolymer, the copolymer is greater than 95%.
6. a kind of carbon fiber modifying bellows according to claim 1, it is characterised in that: preparation method includes following step
It is rapid:
(1) pretreatment of raw material: by straw powder use two-stage pulsed pneumatic drying, carry out high temperature drying, be cooled to room temperature after with
After carbon fiber is sufficiently mixed, acrylic resin is added and carries out heating blending and modifying, carbon fiber and straw powder is made to be wrapped in polypropylene
In resin, modified polypropylene resin is obtained；
(2) Hybrid Heating: by modified polypropylene resin obtained in step (1) and other raw materials be added in hybrid heating device into
After row mixes well and stirring is accelerated to carry out self-heating, mixed raw material is put into storage silo to be cooled to proper temperature spare；
(3) extrusion molding: the mixture in step (2) is added in extruder after heating pressurization squeezes out after being directly entered heating
Mold molding, then be flared to obtain bellows；
(4) in the outside spraying corrosion resistant coating of bellows, bellows finished product spraying drying: is obtained after drying.
7. a kind of carbon fiber modifying bellows according to claim 6, it is characterised in that: in step (1), the high temperature
Drying is 2~4h of drying at 135~150 DEG C, and the temperature of the blending and modifying is 160~168 DEG C.
8. a kind of carbon fiber modifying bellows according to claim 6, it is characterised in that: in step (2), the acceleration
The mixing speed for stirring self-heating is 300~400r/min, and being heated to temperature is 130~140 DEG C, and the proper temperature is 60~70
℃。
9. a kind of carbon fiber modifying bellows according to claim 6, it is characterised in that: in step (3), the heating
Temperature is 190~210 DEG C, and the pressure of the pressurization is 13~15MPa, and the temperature of the mold is 200~220 DEG C, and mold
Temperature be kept above 3~5 DEG C of extruder temperature.
10. a kind of carbon fiber modifying bellows according to claim 6, it is characterised in that: in step (3), the mould
The corrugated cross-section of the bellows obtained after tool molding is with rounded corners trapezoidal.
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| CN104194218A (en) * | 2014-09-01 | 2014-12-10 | 康泰塑胶科技集团有限公司 | Polyethylene-polyvinyl chloride blend-modified tube and preparation method thereof |
| CN107226967A (en) * | 2016-03-23 | 2017-10-03 | 新疆天业（集团）有限公司 | Hidden pipe salt discharge modified PVC bellows |
| CN106432951A (en) * | 2016-09-12 | 2017-02-22 | 上海公元建材发展有限公司 | High-impact-resistant-polyvinyl-chloride double-wall corrugated pipe and preparing method thereof |
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