CN109370107A - A kind of high shock resistance type PVC-U pipe fitting and preparation method thereof - Google Patents
A kind of high shock resistance type PVC-U pipe fitting and preparation method thereof Download PDFInfo
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- CN109370107A CN109370107A CN201811238265.XA CN201811238265A CN109370107A CN 109370107 A CN109370107 A CN 109370107A CN 201811238265 A CN201811238265 A CN 201811238265A CN 109370107 A CN109370107 A CN 109370107A
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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
- 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
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- 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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- C—CHEMISTRY; METALLURGY
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- 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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of high shock resistance type PVC-U pipe fittings and preparation method thereof.It includes the component of following mass fraction: 100 parts of polyvinyl chloride resin, 6 parts~10 parts of nanometer calcium, 3.5 parts~4.5 parts of calcium zinc stabilizer, 0.4 part~0.6 part of lubricant, 5 parts -10 parts of MBS impact modifier, 1.5 parts~2.5 parts of processing aid, 0.4 part~0.6 part of solid plasticizer, 0.5 part~0.7 part of monoglyceride, 1.0 parts~1.5 parts of titanium dioxide.Each group component selections are appropriate in formula of the invention, and compatibility is reasonable.Preferred calcium zinc stabilizer, MBS impact modifier, ACR processing aid, solid plasticizer, monoglyceride, nanometer calcium these types additive reasonable compatibility in the present invention, it is added in polyvinyl chloride resin processing, so that manufactured PVC-U pipe fitting various aspects high comprehensive performance, especially impact strength is very high, toughness is very high, it is often more important that non-toxic and safe environmental protection.
Description
Technical field
The invention belongs to technical field of plastic, be related to a kind of PVC pipe and preparation method thereof, in particular to it is a kind of high
Impact resistant PVC-U pipe fitting and preparation method thereof.
Background technique
PVC-U pipe fitting is compared with traditional pipe fitting, is had light-weight, corrosion-resistant, small flow resistance, is saved energy
The advantages that source, installation fast, low cost, widelyd popularize application, remarkable benefit.China since the last century 80's,
The pilot application PVC-U pipe fitting in municipal works and architectural engineering, by popularization in more than 10 years, PVC-U pipe fitting was obtained
To tremendous development, but the 1/15 of the developed countries and regions such as the still insufficient beauty of consumption per head, day, West Europe.With Minstry of Housing and Urban-Rural Development of People Republic of China (MOHURD)
It issues the notice of " greatly developing chemical building material " jointly Deng five departments, increases the popularization and application to PVC-U pipe fitting of plastic pipeline
Paces, health, environment-friendly type PVC-U water supply and sewerage pipeline pipe fitting constantly replace high energy consumption, high pollution, high cost, low sanitary index
Conventional pipelines, be widely used in: cities and towns tap water water delivery water supply project, Discussion on architecture water supply project, industrial and mining enterprises waterman
Journey, buried fire fighting supply engineering, irrigation and water conservancy burial conveyance of water irrigation engineering, gardens garderning green water supply project, culture fishery supply water
The fields such as drainage system, and achieve good economic benefit and social benefit.
The production method of PVC-U pipe fitting is: using Sanitary PVC (PVC) resin as primary raw material, being added suitable
The various additives for improving plastics performance such as stabilizer, lubricant, filler, the toner of amount, are extruded into through plastic extruder
The production of tubing, pipe fitting is completed in type and injection molding machine injection molding finally by processes such as cooling, solidification, sizing, inspection, packagings.
But existing PVC-U pipe fitting manufactured according to the above method, often due to the various additive selections for improving plastics performance
The selection of improper or manufacturing condition is improper, so that manufactured PVC-U pipe fitting various aspects of performance is not good enough, especially anti-impact
Hit intensity is not high enough；Alternatively, the additive due to selection has toxicity, safe and environment-friendly requirement is not achieved.
Summary of the invention
It is an object of the present invention to overcome the deficiencies of the prior art and provide a kind of highly resistance that can reach safety and environmental protection requirement
Stamp PVC-U pipe fitting and preparation method thereof.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of high shock resistance type PVC-U pipe fitting of the present invention, the component including following mass fraction: 100 parts of polyvinyl chloride resin, nanometer
6 parts~10 parts of calcium, 3.5 parts~4.5 parts of calcium zinc stabilizer, 0.4 part~0.6 part of lubricant, 5 parts -10 parts of MBS impact modifier,
1.5 parts~2.5 parts of processing aid, 0.4 part~0.6 part of solid plasticizer, 0.5 part~0.7 part of monoglyceride, 1.0 parts of titanium dioxide~
1.5 part.
Further, the polyvinyl chloride resin is PVC-5 type resin or PVC-8 type resin.
Further, the MBS impact modifier is by methyl methacrylate, butadiene, styrene these three monomers
Methyl methacrylate/the butadiene/styrene copolymers being polymerized using emulsion grafting polymerization method.
Further, the processing aid is the high-molecular copolymer ACR of esters of acrylic acid.
Further, the nanometer calcium is the nanometer grade calcium carbonate that partial size is 40 nanometers~100 nanometers.
Further, the solid plasticizer is in the copolymerization or compound ester type compound of polyethers and alcohol ester
It is one or more of.Such as terephthalic acid (TPA) dicyclohexyl maleate, glycerin tribenzoate or 1,4 cyclohexane dimethanol dibenzoate
Deng.
Further, the lubricant is in stearic acid, oxidized polyethylene wax, polyethylene wax or polyfunctional group aliphatic ester
One or more.
Above-mentioned high shock resistance type PVC-U pipe fitting the preparation method is as follows: (1) by be formulated as defined in mass fraction weigh various originals
Material；(2) it by other raw materials investment high-speed mixer in addition to MBS impact modifier, is thoroughly mixed uniformly；Again will
MBS impact modifier is added in high-speed mixer, is thoroughly mixed uniformly, is obtained the uniformly mixed material for preparing pipe fitting
(i.e. blend composition)；(3) by uniformly mixed blend composition, extrusion molding or extruding pelletization, calendering formation in extruder are put into；Or
Put into injection molding in injection molding machine；(4) cooling, solidification, sizing, obtain high shock resistance type PVC-U pipe fitting.
Further, in above-mentioned steps (2), other raw materials in addition to MBS impact modifier are put into high-speed mixer
In, it is stirred 5-15 minutes at 400-600rpm, until being sufficiently mixed uniformly；MBS impact modifier is added to high-speed stirred again
In machine, continue stirring 20-30 minute at 300-450rpm, until being sufficiently mixed uniform, obtains the uniformly mixed pipe fitting for preparing
Material (i.e. blend composition).
Further, in above-mentioned steps (3), uniformly mixed blend composition is put into extruder, at 120 DEG C~150 DEG C
Lower plasticizing, extrusion molding；Or in investment injection molding machine, the injection molding at 120 DEG C~150 DEG C.
Beneficial effects of the present invention:
Each group component selections are appropriate in formula of the invention, and compatibility is reasonable, by high shock resistance type PVC-U pipe fitting formula of the invention
And preparation method, the high shock resistance type PVC-U pipe fitting and pipeline of high-intensitive, high tenacity safety and environmental protection can be produced.
Compared with the prior art, the invention has the following advantages:
1, the calcium zinc stabilizer selected in the present invention is a kind of good non-toxic stabilizer of safety and environmental protection.It is by calcium
Salt, zinc salt, lubricant, antioxidant etc. are what main component was combined using special combination process.It can not only replace biography
The toxic stabilizer such as the lead cadmium salt class of system and organic tin, and there is fairly good thermal stability, photostability and the transparency
And tinting strength, tinting power.Calcium zinc stabilizer is for having good dispersibility, compatibility, processing fluidity in polyvinyl chloride resin process, heat
Excellent in stability, initial stage form and aspect are small, no precipitation phenomenon；Without heavy metal and other toxic components, no sulfation；Also have excellent
Good electrical insulating property, efficient weatherability；Its dosage is few, wide adaptability, and product surface finish is excellent；It is white in white article
Spend more other similar products more preferably.
2, the MBS impact modifier selected in the present invention, can greatly improve opaque PVC pipe (especially feed pipe
Material), PVC pipe (especially water supply pipe fitting), the impact strength and toughness of the products such as PVC profile.MBS is by methacrylic acid
Methyl methacrylate/fourth two that these three monomers of methyl esters, butadiene, styrene use emulsion grafting polymerization method to be polymerized
Alkene/styrol copolymer.The good mechanical performance of MBS, transparency are high, and have good rigidity, molding processibility and higher
Dimensional stability the advantages that.The performance of MBS is how many and different according to the content of its three kinds of monomers, wherein increases methyl
The transparency can be improved when methyl acrylate content；It can be improved when increasing butadiene content and rush toughness；And when increasing styrene-content
It then can provide excellent moulding processability.The MBS that 5-10% is added in high-density polyethylene resin carries out blending and modifying, can
So that the impact strength of product is improved 4-15 times, can be made into high impact-resistant type PVC-U tubing and pipe fitting.
3, in the present invention solid plasticizer selected be a kind of safety and environmental protection non-toxic high molecular polymer, it be polyethers and
One or more of compound made of the copolyreaction of alcohol ester or compound ester type compound.This solid plasticizer is than passing
The adjacent benzene class I liquid I plasticizer volatility and toxicity of system are all much smaller, have no adverse effects to human health.And have good
Electrical property, cold resistance, heat resistance, resistance to extractable, plasticizing efficiency are high.The compatibility of the solid plasticizer and PVC are fine, are using
The surface for moving to product will not be precipitated in the process, moreover it is possible to which the toughness and elasticity for significantly improving product make surface tension, stretch by force
Degree, creep become a series of performances such as strong and resistance to stress cracking resistance and increase.Filler and colorant can also be improved in plastics
In dispersibility, accelerate plasticizing rate, extrusion output is steady, and melt temperature is evenly distributed, product size is stable, uniform wall thickness.
Whiteness, the transparency that product can also be improved keep the product squeezed out smooth, glossy.
4, processing aid of the ACR as polyvinyl chloride resin is selected in the present invention, can be obviously shortened fusion time, accelerates melting, is promoted
Into plasticizing；It can be effectively reduced PVC melt processing temperature, improve the weather resistance of product simultaneously on the basis of slightly energy-efficient；
The pressure oscillation as caused by extrusion forming and flowing scar, effectively avoid generating wave when can effectively prevent squeezing out and being molded
The cosmetic issues such as line, zebra stripes；To extruded product, its counter balance torque can be made to improve, keep its plasticizing uniform；It can be improved product
Surface gloss due to being plasticized uniformly, while can assist improving tensile strength, the impact strength, elongation at break of product
Etc. mechanical properties.
5, the monoglyceride i.e. glycerin monostearate selected in the present invention is a kind of non-ionic surfactant.It was both
Have hydrophilic and have lipophilic group, there are the multiple functions such as lubrication, wet, emulsification, blistering, antistatic.It can not only be used in plastics
Plasticizer, modifying agent, but also as lubricant, blowing promotor, the antishrinking agent in plastics, be alternatively arranged as in plastics resist it is quiet
Electric agent, dust-proofing agent.
6, it is that 40 nanometers~100 nanometers of nanometer grade calcium carbonate makees filler that nanometer calcium, that is, partial size is selected in the present invention.Grain
When the particle of small, large specific surface area the nanoscale of diameter is evenly distributed among matrix plastic, it can be brought to the performance of material
Qualitative leap.
7, the present invention in preferably calcium zinc stabilizer, MBS impact modifier, ACR processing aid, solid plasticizer, monoglyceride,
Nanometer calcium these types additive reasonable compatibility is added in polyvinyl chloride resin processing, has synergistic function, so that manufactured PVC-U
Pipe fitting various aspects high comprehensive performance, especially impact strength is very high, and toughness is very high, it is often more important that non-toxic and safe environmental protection.
Specific embodiment
The present invention is further illustrated with reference to embodiments.
Embodiment 1
A kind of high shock resistance type PVC-U pipe fitting of the present invention, the component including following mass fraction: 100 parts of polyvinyl chloride resin, nanometer
6 parts of calcium, 3.5 parts of calcium zinc stabilizer, 0.4 part of lubricant, 5 parts of MBS impact modifier, 1.5 parts of processing aid, solid plasticizer
0.4 part, 0.5 part of monoglyceride, 1.0 parts of titanium dioxide.
The polyvinyl chloride resin is PVC-8 type resin.
The MBS impact modifier is to be connect by methyl methacrylate, butadiene, styrene these three monomers using lotion
Methyl methacrylate/butadiene/styrene copolymers that branch polymerization is polymerized.
The processing aid is the high-molecular copolymer ACR of esters of acrylic acid.
The nanometer calcium is the nanometer grade calcium carbonate that partial size is 40 nanometers.
The lubricant is stearic acid.
The solid plasticizer is terephthalic acid (TPA) dicyclohexyl maleate.
Above-mentioned high shock resistance type PVC-U pipe fitting the preparation method is as follows: (1) by be formulated as defined in mass fraction weigh various originals
Material；(2) it by other raw materials investment high-speed mixer in addition to MBS impact modifier, is stirred 15 minutes at 400rpm, until
It is sufficiently mixed uniformly；MBS impact modifier is added in high-speed mixer again, continues stirring 30 minutes at 300 rpm, until
It is sufficiently mixed uniformly, obtains the uniformly mixed material (i.e. blend composition) for preparing pipe fitting；(3) by above-mentioned uniformly mixed blending
Material is put into extruder, plasticizing, extrusion molding at 120 DEG C；(4) cooling, solidification, sizing obtain high shock resistance type PVC-U pipe
Part.
Embodiment 2
A kind of high shock resistance type PVC-U pipe fitting of the present invention, the component including following mass fraction: 100 parts of polyvinyl chloride resin, nanometer
10 parts of calcium, 4.5 parts of calcium zinc stabilizer, 0.6 part of lubricant, 10 parts of MBS impact modifier, 2.5 parts of processing aid, solid plasticizer
0.6 part, 0.7 part of monoglyceride, 1.5 parts of titanium dioxide.
The polyvinyl chloride resin is PVC-5 type resin.
The MBS impact modifier is to be connect by methyl methacrylate, butadiene, styrene these three monomers using lotion
Methyl methacrylate/butadiene/styrene copolymers that branch polymerization is polymerized.
The processing aid is the high-molecular copolymer ACR of esters of acrylic acid.
The nanometer calcium is the nanometer grade calcium carbonate that partial size is 100 nanometers.
The lubricant is oxidized polyethylene wax.
The solid plasticizer is glycerin tribenzoate.
Above-mentioned high shock resistance type PVC-U pipe fitting the preparation method is as follows: (1) by be formulated as defined in mass fraction weigh various originals
Material；(2) it by other raw materials investment high-speed mixer in addition to MBS impact modifier, stirs 5 minutes at 600 rpm, until
It is sufficiently mixed uniformly；MBS impact modifier is added in high-speed mixer again, continues stirring 20 minutes at 450 rpm, until
It is sufficiently mixed uniformly, obtains the uniformly mixed material (i.e. blend composition) for preparing pipe fitting；(3) by above-mentioned uniformly mixed blending
Material is put into extruder, plasticizing, extruding pelletization, calendering formation at 150 DEG C；(4) cooling, solidification, sizing, obtain high-impact
Type PVC-U pipe fitting.
Embodiment 3
A kind of high shock resistance type PVC-U pipe fitting of the present invention, the component including following mass fraction: 100 parts of polyvinyl chloride resin, nanometer
8 parts of calcium, 4 parts of calcium zinc stabilizer, 0.5 part of lubricant, 8 parts of MBS impact modifier, 2.0 parts of processing aid, solid plasticizer 0.5
Part, 0.6 part of monoglyceride, 1.2 parts of titanium dioxide.
The polyvinyl chloride resin is PVC-8 type resin.
The MBS impact modifier is to be connect by methyl methacrylate, butadiene, styrene these three monomers using lotion
Methyl methacrylate/butadiene/styrene copolymers that branch polymerization is polymerized.
The processing aid is the high-molecular copolymer ACR of esters of acrylic acid.
The nanometer calcium is the nanometer grade calcium carbonate that partial size is 80 nanometers.
The lubricant is polyethylene wax.
The solid plasticizer is 1,4 cyclohexane dimethanol dibenzoate.
Above-mentioned high shock resistance type PVC-U pipe fitting the preparation method is as follows: (1) by be formulated as defined in mass fraction weigh various originals
Material；(2) it by other raw materials investment high-speed mixer in addition to MBS impact modifier, stirs 10 minutes at 500 rpm, until
It is sufficiently mixed uniformly；MBS impact modifier is added in high-speed mixer again, continues stirring 25 minutes at 400rpm, until
It is sufficiently mixed uniformly, obtains the uniformly mixed material (i.e. blend composition) for preparing pipe fitting；(3) by above-mentioned uniformly mixed blending
Material is put into injection molding machine, the injection molding at 135 DEG C.(4) cooling, solidification, sizing, obtain high shock resistance type PVC-U pipe fitting.
Performance comparison test:
The toughness and shock resistance of product (three kinds of high shock resistance type PVC-U pipe fittings of above three embodiments) of the invention
Test data is compareed and be see the table below with the toughness of existing conventional products (impact resistant PVC-U pipe fitting) and shock resistance test data.
| Project | The index of existing conventional products | The index of product of the invention |
| Shock resistance (drop shutter test) | 2m height freely lands crack-free | 2m height drop impact crack-free |
| Vicat softening point temperature, DEG C | 74 | 81 |
It can be seen that preferred calcium zinc stabilizer in the present invention, MBS impact modifier, ACR processing aid, solid plasticizer,
Monoglyceride, nanometer calcium these types additive reasonable compatibility are added in polyvinyl chloride resin processing, and manufactured PVC-U pipe fitting various aspects are comprehensive
Function admirable, especially impact strength are very high, and toughness is very high, and more importantly non-toxic and safe environmental protection.
Claims (10)
1. a kind of high shock resistance type PVC-U pipe fitting, which is characterized in that it includes the component of following mass fraction: 100 parts of polyvinyl chloride resin,
6 parts~10 parts of nanometer calcium, 3.5 parts~4.5 parts of calcium zinc stabilizer, 0.4 part~0.6 part of lubricant, 5 part -10 of MBS impact modifier
Part, 1.5 parts~2.5 parts of processing aid, 0.4 part~0.6 part of solid plasticizer, 0.5 part~0.7 part of monoglyceride, 1.0 parts of titanium dioxide
~1.5 parts；
The MBS impact modifier is to be gathered by methyl methacrylate, butadiene, styrene these three monomers using emulsion graft polymerization
Legal methyl methacrylate/the butadiene/styrene copolymers being polymerized.
2. high shock resistance type PVC-U pipe fitting as described in claim 1, which is characterized in that the polyvinyl chloride resin is PVC-5 type resin
Or PVC-8 type resin.
3. high shock resistance type PVC-U pipe fitting as claimed in claim 1 or 2, which is characterized in that the processing aid is acrylate
The high-molecular copolymer ACR of class.
4. high shock resistance type PVC-U pipe fitting as claimed in claim 1 or 2, which is characterized in that the nanometer calcium is that partial size is received for 40
Rice~100 nanometers of nanometer grade calcium carbonate.
5. high shock resistance type PVC-U pipe fitting as claimed in claim 1 or 2, which is characterized in that the solid plasticizer be polyethers and
One or more of the copolymerization of alcohol ester or compound ester type compound.
6. high shock resistance type PVC-U pipe fitting as claimed in claim 1 or 2, which is characterized in that the solid plasticizer is to benzene two
One or more of formic acid dicyclohexyl maleate, glycerin tribenzoate, 1,4 cyclohexane dimethanol dibenzoate.
7. high shock resistance type PVC-U pipe fitting as claimed in claim 1 or 2, which is characterized in that the lubricant is stearic acid, oxygen
Change one or more of polyethylene wax, polyethylene wax or polyfunctional group aliphatic ester.
8. a kind of preparation method of high shock resistance type PVC-U pipe fitting as claimed in claim 1, which is characterized in that by with
Lower step carries out: (1) weighing various raw materials by mass fraction as defined in formula；It (2) will be other in addition to MBS impact modifier
Raw material is put into high-speed mixer, is thoroughly mixed uniformly；MBS impact modifier is added in high-speed mixer again, is filled
Divide and be uniformly mixed, obtains the uniformly mixed material for preparing pipe fitting, i.e. blend composition；(3) it by uniformly mixed blend composition, throws
Enter injection molding in extrusion molding in extruder, or investment injection molding machine；(4) cooling, solidification, sizing, obtain high shock resistance type PVC-U
Pipe fitting.
9. the preparation method of high shock resistance type PVC-U pipe fitting as claimed in claim 8, which is characterized in that in above-mentioned steps (2),
By in other raw materials investment high-speed mixer in addition to MBS impact modifier, stirred 5-15 minutes at 400-600rpm, until
It is sufficiently mixed uniformly；MBS impact modifier is added in high-speed mixer again, continues to stir 20-30 at 300-450rpm
Minute, until being sufficiently mixed uniformly, obtain the uniformly mixed material for preparing pipe fitting, i.e. blend composition.
10. the preparation method of high shock resistance type PVC-U pipe fitting as claimed in claim 8, which is characterized in that in above-mentioned steps (3),
Uniformly mixed blend composition is put into extruder, plasticizing, extrusion molding at 110 DEG C~160 DEG C；Or in investment injection molding machine,
The injection molding at 110 DEG C~160 DEG C.
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| CN110372975A (en) * | 2019-09-02 | 2019-10-25 | 百尔罗赫塑料添加剂（江苏）有限公司 | It is a kind of for improving the environmentally friendly auxiliary agent and preparation method thereof of PVC injection molding pipe part performance |
| CN111087718A (en) * | 2019-12-30 | 2020-05-01 | 上海上塑控股（集团）有限公司 | Impact-resistant PVC-U pipe and preparation method thereof |
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| CN112920529A (en) * | 2021-03-10 | 2021-06-08 | 新疆中泰化学阜康能源有限公司 | Special PVC valve injection molding granule for drip irrigation and preparation method thereof |
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| CN116023748A (en) * | 2023-02-13 | 2023-04-28 | 江苏诺贝尔塑业股份有限公司 | High-strength plastic sound tube and its production process |
| CN117106268A (en) * | 2023-09-07 | 2023-11-24 | 杭州管康塑业有限公司 | High-impact-resistance high-weather-resistance PVC reinforced pipe and preparation method thereof |
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Application publication date: 20190222 |