CN105086236A - U-PVC plastic, pipe fitting made of U-PVC plastic and preparing method of pipe fitting - Google Patents
U-PVC plastic, pipe fitting made of U-PVC plastic and preparing method of pipe fitting Download PDFInfo
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Abstract
The invention discloses U-PVC plastic, a pipe fitting made of the U-PVC plastic and a preparing method of the pipe fitting. The U-PVC plastic is prepared from, by mass, 100 parts of PVC resin, 0.5-5 parts of solid plasticizer, 1-6 parts of heat stabilizer, 1-5 parts of processing performance additive, 2-10 parts of anti-shock performance additive and 0.1-2 parts of lubricant. The solid plasticizer is a compound formed by copolymerization of polyether and alcohol ester or one or a mixture of compound ester compounds. The U-PVC plastic can be well applied to preparation of the U-PVC pipe fitting, and the processing requirement is met; the solid plasticizer is a non-toxic high-molecular polymer, is good in compatibility with PVC, cannot dissolve out to move to the surface of a product in the using process and can obviously improve the rigidity strength of materials and the vicat and hydraulic performance of the product, and the overall quality of the product can be improved.
Description
Technical field
The invention belongs to U-PVC plastic pipe technical field.More specifically, a kind of rigid polyvinyl chloride (U-PVC) plastics and pipe fitting thereof and making method is related to.
Background technology
Namely rigid polyvinyl chloride (U-PVC) plastic pipe is play the component of effect such as connection, control, break-in, shunting, sealing, support and the general designation of accessory in tubing system.Compared to tubing, the requirement of pipe fitting to comprehensive process performance is higher, especially very high to the requirement of processing fluidity, and on the other hand, but there is very high requirement to hardness and pressure-bearing property.
At present, in order to make up processing insufficient flow, plastify bad problem, the softening agent added in rigid polyvinyl chloride (U-PVC) plastic pipe formula is liquid adjacent benzene class softening agent, particularly dibutyl phthalate (being called for short DBP) and o-phthalic acid dibutyl ester (being called for short DOP) etc. substantially.But along with the application of DBP/DOP on food, medicine and drinking water indus is more and more extensive, the toxicity problem of people to it is also more and more paid attention to.Study discovery according to investigations, after tap water Long Term Contact is containing the plastic pipe of DBP/DOP, DBP/DOP content in tap water can exceed standard, illustrate that DBP/DOP in use can stripping, the water drunk containing the DBP/DOP that exceeds standard as people not only can damage healthy, also can cause bad impact to environment.Specify according to European Food safety mechanism EFSA, in human body, the concentration of DBP/DOP reaches more than 0.05 mg/kg and is just considered to unsafe.The American National authority ICR of nineteen eighty-two has carried out biological assay to the carinogenicity of DBP/DOP, and its conclusion is, DBP/DOP is the carcinogens of rat and mouse, and the liver nibbling class animal can be made carcinogenic.So the toxicity about DBP/DOP causes the common concern of people, whether although the carcinogenic saying of people can be made still to debate endlessly up till now, because it exists potential carcinogenic suspicion, each state all takes corresponding measure.U.S. environment protection general bureau, according to the result of study of National Cancer Institute, stopped the production of 6 kinds of phthalic ester industry; Government of Switzerland has determined to prohibit the use DBP/DOP in toy for children; Germany forbids adding DBP/DOP in all plastics relevant to human physiology, food; Japan forbids adding DBP/DOP in medicine equipment related products and tap water related products.And in China, the adjacent benzene such as DBP/DOP class softening agent is also in a large amount of use, and the particularly softening agent that uses of rigid PVC tubing products, still based on DBP/DOP.
In addition, add this adjacent benzene class I liquid I softening agent and not only can cause bad impact to environmental and human health impacts, also can cause adverse influence to the performance of product.Based on current present situation, in the urgent need to producing not containing the rigid PVC tubing products of adjacent benzene class softening agent.
Summary of the invention
The technical problem to be solved in the present invention is the defect and the technical deficiency that overcome existing rigid polyvinyl chloride (U-PVC) plastic pipe, there is provided a kind of have no side effect and the possibility that is drawn out of of softening agent minimum, not containing rigid polyvinyl chloride (U-PVC) plastic pipe of adjacent benzene class solid plasticizer, avoid U-PVC prepared by the current adjacent benzene class I liquid I softening agent harm to human body and environment, and improve performance, the improving product total quality of U-PVC product.
The object of this invention is to provide a kind of rigid polyvinyl chloride (U-PVC) plastics.
Another object of the present invention is to provide the application of above-mentioned rigid polyvinyl chloride (U-PVC) plastics in preparation U-PVC plastic pipe.
Still a further object of the present invention is to provide a kind of rigid polyvinyl chloride (U-PVC) plastic pipe and preparation method thereof.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of rigid polyvinyl chloride (U-PVC) plastics, are made up of the component of following mass parts: polyvinyl chloride (PVC) RESINS 100 parts, solid plasticizer 0.5 ~ 5, thermo-stabilizer 1 ~ 6 part, processing modified adjuvant 1 ~ 5 part, impact-resistant modified auxiliary agent 2 ~ 10 parts, lubricant 0.1 ~ 2 part.
Wherein, described solid plasticizer is the compound of the copolyreaction of polyethers and alcohol ester, or one or more mixtures in complex ester compounds.As terephthalic acid dicyclohexyl maleate, glyceryl tribenzoate or 1,4 cyclohexane dimethanol dibenzoate etc.
Preferably, described solid plasticizer is the compound of the copolyreaction of polyethers and alcohol ester.
Particularly, the solid plasticizer that can commercially obtain at present all can use.Can preferred embodiment as one, described solid plasticizer is the product G-P20B that city is purchased from Zhong Shangusheng chemical industry company limited.
In addition, preferably, above-mentioned rigid polyvinyl chloride (U-PVC) plastics are made up of the component of following mass parts: polyvinyl chloride (PVC) RESINS 100 parts, solid plasticizer 1.5 ~ 3 parts, thermo-stabilizer 3 ~ 6 parts, processing modified adjuvant 2 ~ 3 parts, impact-resistant modified auxiliary agent 2 ~ 5 parts, lubricant 1 ~ 2 part.
More preferably, above-mentioned rigid polyvinyl chloride (U-PVC) plastics are made up of the component of following mass parts: polyvinyl chloride (PVC) RESINS 100 parts, solid plasticizer 1.5 parts, thermo-stabilizer 5 parts, processing modified adjuvant 2.5 parts, impact-resistant modified auxiliary agent 3 parts, lubricant 1.5 parts.
Preferably can embodiment as one, in the formula of above-mentioned rigid polyvinyl chloride (U-PVC) plastics, described polyvinyl chloride (PVC) RESINS is that suspension method obtains, and the vinyl chloride-butyl acrylate compolymer in polyvinyl chloride (PVC) RESINS is less than 1.0mg/kg, and the viscosity of polyvinyl chloride (PVC) RESINS is 50ml/g ~ 110ml/g.
Preferably, described thermo-stabilizer is environment-friendly calcium zinc stabilizer; Further preferably, described thermo-stabilizer is environment-friendly type powdery or granular composite calcium zinc stabilizing agent, and in this stablizer, the mass percentage of calcium and zinc is all less than 1.5%.
Preferably, described processing modified adjuvant is the mixture of one or more in methylmethacrylate copolymer (ACR), σ-methylstyrene oligomers or vinylformic acid and cinnamic multipolymer;
Preferably, described impact-resistant modified auxiliary agent is the mixture of one or more in MBS graft copolymer (MBS), chlorinatedpolyethylene (CPE), ethylene-vinyl acetate copolymer (EVA) or Polymers (ACR);
Preferably, described lubricant is one or more the combination in stearic acid, oxidized polyethlene wax, polyethylene wax or polyfunctional group fatty acid ester.
As one is most preferred can embodiment, in the formula of above-mentioned rigid polyvinyl chloride (U-PVC) plastics: described processing modified adjuvant is methylmethacrylate copolymer; Described impact-resistant modified auxiliary agent is methyl methacrylate/butadiene/styrene copolymers; Described lubricant is polyethylene wax.
In addition, the application of above-mentioned rigid polyvinyl chloride (U-PVC) plastics in preparation U-PVC plastic pipe is also within protection scope of the present invention.More preferably, the application in preparation pressure-bearing class U-PVC plastic pipe is referred to.
The U-PVC plastic pipe prepared by above-mentioned rigid polyvinyl chloride (U-PVC) plastics is also within protection scope of the present invention.
Particularly, as the enforceable scheme of one, the method preparing such U-PVC plastic pipe is as follows: after each feed composition mixing, carry out premix in input high-speed mixer obtain compound and heat, when the temperature of compound reaches 105 DEG C ~ 115 DEG C, discharge, then under 110 DEG C ~ 160 DEG C conditions, plasticizing, extruding pelletization form, and obtain finally by injection moulding machine injection moulding.
Further preferably, the method for such U-PVC plastic pipe of above-mentioned preparation is as follows:
S1. according to the feeding sequence that solid plasticizer feeds intake after polyvinyl chloride (PVC) RESINS and thermo-stabilizer, after each feed composition mixing, add in the hot mixer of high speed and carry out blending dispersion, proceed to when temperature reaches 105 ~ 115 DEG C in cold mixer and stir cooling, hopper is entered when temperature drops to below 50 DEG C, stand-by;
S2. mixed ingredients stand-by in hopper described in S1 is added parallel double-screw or conical double screw extruder carries out extruding pelletization, obtain evengranular pellet, the temperature of forcing machine is set to: 150 DEG C, 145 DEG C, 130 DEG C, 120 DEG C, and the temperature that granulation is got to know is set to 120 DEG C, 135 DEG C;
S3. added in injection moulding machine by the pellet that S2 makes and carry out injection molding, finally obtain product or half product after cooling and shaping, the temperature of injection moulding machine is set to: 190 DEG C, 188 DEG C, 185 DEG C, 180 DEG C, 173 DEG C, 165 DEG C.
The present invention is directed to U-PVC pipe fitting and do large quantifier elimination and exploration, because the complete processing difference of U-PVC pipe fitting and other types tubing and soft PVC pipe is very large, generally, liquid plasticizer is not used to be very unmanageable in U-PVC pipe fitting preparation process, even cannot meet processing request, this point is the difficult problem that the present invention must consider and overcome.In addition, in order to meet the requirement of safety and environmental protection, also must select the softening agent of environment-friendly type, softening agent used also cannot be selected arbitrarily, Cai without prejudice to the initial study tenet of the present invention, therefore, too increase the difficulty of research.
The present invention is by lot of experiments and application, successfully draw the formula of above-mentioned rigid polyvinyl chloride (U-PVC) plastics, the preparation of rigid polyvinyl chloride (U-PVC) pipe fitting can well be applied to, meet the requirement of processing, and the solid plasticizer used is a kind of nontoxic high molecular polymer, hygienic environment-protecting, neighbour benzene class I liquid I plasticizer volatility and toxicity all much little, person's physiological processes is had no adverse effects, when contacting with other physiological fluid, the danger be drawn out of can be ignored.In addition, the consistency of the solid plasticizer that the present invention uses and PVC is fine, in use can not separate out the surface moving to goods, the rigid of material can also be significantly improved, improve the dimension card of product, improve the hydraulic performance of product, the total quality of improving product.
The present invention has following beneficial effect:
Rigid polyvinyl chloride of the present invention (U-PVC) plastic pipe formula is particularly useful for making pressure-bearing class rigid polyvinyl chloride (U-PVC) plastic pipe, significant to the lifting of environment protection and product over-all properties, has following significant advantage:
(1) there is splendid fluidity of molten, make the goods being difficult to forming process be easy to shaping, be particularly useful in the making of U-PVC pipe fitting, make the easier mold filling of goods, ensure the smooth forming process of goods.
(2) a kind of nontoxic high molecular polymer of solid plasticizer of the present invention's use, hygienic environment-protecting, neighbour benzene class I liquid I plasticizer volatility and toxicity all much little, person's physiological processes is had no adverse effects, when contacting with other physiological fluid, the danger be drawn out of can be ignored, the health problem to human body and environment that the precipitation that can solve containing the liquid plasticizer of adjacent benzene class causes.
(3) consistency of solid plasticizer and PVC that uses of the present invention very well, in use can not separate out the surface moving to goods; And whole formula system can improve the problem of complete processing, the requirement of processing can be met, the rigid of material can be significantly improved, improve the dimension card of product, improve the hydraulic performance of product, the total quality of improving product, goods physicals is easier to maintaining a long-term stability property, is specially adapted to pressure-bearing class rigid polyvinyl chloride (U-PVC) plastic pipe.
(4) while enhancing product performance, compare with traditional liquid plasticizer, due to the reduction of consumption, can be significantly cost-saving, the product of super quality and competitive price is provided.
(5) compare with traditional liquid plasticizer, because the solid plasticizer used is powder, it is more accurate to weigh, and carrying is easier, and workshop can be kept clean and tidy.
Embodiment
Further illustrate the present invention below in conjunction with specific embodiment, but embodiment does not limit in any form to the present invention.Unless stated otherwise, the present invention adopts reagent, method and apparatus are the art conventional reagent, method and apparatus.
Unless stated otherwise, following examples agents useful for same and material are commercial.
embodiment 1
1, not containing the feed composition of the rigid PVC pipe fitting of the solid plasticizer of adjacent benzene class, undertaken selecting materials and accurate weighing by kind of the formula scheme of three in table 1 respectively.Wherein, described solid plasticizer is the compound of the copolyreaction of polyethers and alcohol ester, or one or more mixtures in complex ester compounds.
Described polyvinyl chloride (PVC) RESINS is that suspension method obtains, and the vinyl chloride-butyl acrylate compolymer in polyvinyl chloride (PVC) RESINS is less than 1.0mg/kg, and the viscosity of polyvinyl chloride (PVC) RESINS is 50ml/g ~ 110ml/g.
Described thermo-stabilizer is environment-friendly calcium zinc stabilizer; Further preferably, described stablizer is environment-friendly type powdery or granular composite calcium zinc stabilizing agent, and in this stablizer, the mass percentage of calcium and zinc is all less than 1.5%.
Described processing modified adjuvant is the mixture of one or more in MPM methyl polymethacrylate multipolymer (ACR), σ-methylstyrene oligomers or vinylformic acid and cinnamic multipolymer;
Described impact-resistant modified auxiliary agent is the mixture of one or more in MBS graft copolymer (MBS), chlorinatedpolyethylene (CPE), ethylene-vinyl acetate copolymer (EVA) or Polymers (ACR);
Described lubricant is one or more the combination in stearic acid, oxidized polyethlene wax, polyethylene wax or polyfunctional group fatty acid ester.
Table 1
2, U-PVC plastic pipe is prepared as follows:
S1. mix: the feeding sequence fed intake after polyvinyl chloride (PVC) RESINS and thermo-stabilizer according to solid plasticizer, after each feed composition mixing, add in the hot mixer of high speed and carry out blending dispersion, proceed to when temperature reaches 105 ~ 115 DEG C in cold mixer and stir cooling, hopper is entered when temperature drops to below 50 DEG C, stand-by;
S2. extruding pelletization: mixed mixed ingredients cold in hopper described in S1 is added parallel double-screw or conical double screw extruder carries out extruding pelletization, obtain evengranular pellet, the temperature of forcing machine is set to: 150 DEG C, 145 DEG C, 130 DEG C, 120 DEG C, and the temperature that granulation is got to know is set to 120 DEG C, 135 DEG C;
S3. injection moulding: the pellet made by S2 adds in injection moulding machine and carries out injection molding, and finally obtain product or half product after cooling and shaping, the temperature of injection moulding machine is set to: 190 DEG C, 188 DEG C, 185 DEG C, 180 DEG C, 173 DEG C, 165 DEG C.
3, according to the regulation of GB/T10002.2-2003, the various performances of the U-PVC plastic pipe of above-mentioned preparation are tested.The present invention, through a large amount of experiments, have studied the product performance of each formula combination above-mentioned, and sum up and draw to draw a conclusion, detected result is as shown in table 2.
Table 2
the research of embodiment 2 rigid PVC pipe fitting formula
1, solid plasticizer content is on the impact of rigid PVC pipe fitting
(1) by the formula of table 3, U-PVC plastic pipe is prepared according to the making method described in embodiment 1.
Wherein, described polyvinyl chloride (PVC) RESINS is that suspension method obtains, and the vinyl chloride-butyl acrylate compolymer in polyvinyl chloride (PVC) RESINS is less than 1.0mg/kg, and the viscosity of polyvinyl chloride (PVC) RESINS is 50ml/g ~ 110ml/g;
Product G-the P20B of Zhong Shangusheng chemical industry company limited is the compound of the copolyreaction of a kind of polyethers and alcohol ester.
Described thermo-stabilizer is environment-friendly type composite calcium zinc stabilizing agent, and in this stablizer, the mass percentage of calcium and zinc is all less than 1.5%;
Described processing modified adjuvant is methylmethacrylate copolymer;
Described impact-resistant modified auxiliary agent is methyl methacrylate/butadiene/styrene copolymers;
Described lubricant is polyethylene wax.
Table 3
(2) according to the regulation of GB/T10002.2-2003, test the various performances of the U-PVC plastic pipe of above-mentioned preparation, result shows, and oven test all shows without layering, without decortication, bubble-free; Hydro-test result pipe fitting is all unchanged; Heavy metal content is all≤0.1 also; The equal crack-free of drop test, all meets the requirement of U-PVC plastic pipe.
In addition, carry out continuous drop shutter test, add up each group of experiment number when there is rupture event, to evaluate the physicalies such as the crushing resistance of each set product.Result is as shown in table 4.
Table 4
2, auxiliary agent is on the impact of content proportioning in solid plasticizer and formula thereof
(1) the same, by the formula of table 5, prepare U-PVC plastic pipe according to the making method described in embodiment 1.
Table 5
(2) according to the regulation of GB/T10002.2-2003, test the various performances of the U-PVC plastic pipe of above-mentioned preparation, result shows, and oven test all shows without layering, without decortication, bubble-free; Hydro-test result pipe fitting is all unchanged; Heavy metal content is all≤0.1 also; The equal crack-free of drop test, all meets the requirement of U-PVC plastic pipe.
In addition, carry out continuous drop shutter test, add up each group of experiment number when there is rupture event, to evaluate the physicalies such as the crushing resistance of each set product.Result is as shown in table 6.
Table 6
From the data of table 4 and table 6, solid plasticizer content has important impact to rigid PVC pipe fitting, the optimum content of content on solid plasticizer of other auxiliary agents has important impact, comprehensively it seems, proportioning in formula between each material is interactional, and each single factor test is not work separately.In addition, the present invention has also carried out allocating research to the type of various auxiliary agent, and result shows, and the increase of assistant types, minimizing, replacement adjustment, all can have significant impact to the performance of the content of solid plasticizer and effectiveness thereof.And these interact relation do not demonstrate single, regular regularity yet.
comparative example
1, according to following formula preparation U-PVC plastic pipe
(1) experimental group:
Preparation component according to following mass parts: polyvinyl chloride (PVC) RESINS 100 parts, solid plasticizer 1.5 parts, thermo-stabilizer 5 parts, processing modified adjuvant 2.5 parts, impact-resistant modified auxiliary agent 3 parts, lubricant 1.5 parts.
Described polyvinyl chloride (PVC) RESINS is that suspension method obtains, and the vinyl chloride-butyl acrylate compolymer in polyvinyl chloride (PVC) RESINS is less than 1.0mg/kg, and the viscosity of polyvinyl chloride (PVC) RESINS is 50ml/g ~ 110ml/g;
Product G-the P20B of Zhong Shangusheng chemical industry company limited is the compound of the copolyreaction of a kind of polyethers and alcohol ester.
Described thermo-stabilizer is environment-friendly calcium zinc stabilizer;
Described processing modified adjuvant is methyl methacrylate;
Described impact-resistant modified auxiliary agent is methyl methacrylate/butadiene/styrene copolymers;
Described lubricant is polyethylene wax.
U-PVC plastic pipe is prepared according to the making method described in embodiment 1.
(2) comparative group 1: be with experimental group difference: solid plasticizer is replaced by liquid plasticizer o-phthalic acid dibutyl ester (DOP).
(3) comparative group 2: be with experimental group difference: solid plasticizer is replaced by and adds solid plasticizer and liquid plasticizer (liquid plasticizer o-phthalic acid dibutyl ester DOP) simultaneously, and the two is respectively 1.0 parts, 0.5 part.
(4) comparative group 3: be with experimental group difference: feed composition proportioning is as follows:
Polyvinyl chloride (PVC) RESINS 100 parts, solid plasticizer 1.5 parts, thermo-stabilizer 5 parts, impact-resistant modified auxiliary agent 3 parts, 1.5 parts, activator, toughner 5 parts, hard barium 1 part and epoxy resin 3 parts.
Wherein, the mixing of described polyvinyl chloride (PVC) RESINS to be K value the be mass polymerization polyvinyl chloride of 66 ~ 86 and a kind of of suspension polymerization polyvinyl chloride or two kinds; Described softening agent is the mixing of epoxy soybean oil and diisononyl phthalate; Described activator is ethylenediamine phosphate; Described toughner is methyl methacrylate-divinyl-styrene copolymer (MBS); Described epoxy resin is bis phenol-a epoxy resins.
(5) comparative group 4: be with experimental group difference: feed composition proportioning is as follows:
Polyvinyl chloride (PVC) RESINS accounts for 100 parts, and solid plasticizer accounts for 10 parts, and stablizer accounts for 5 parts, and auxiliary stabilizer accounts for 5 parts, and lubricant accounts for 1.5 parts.Wherein, described stablizer is composite calcium zinc stabilizing agent; Described auxiliary stabilizer is epoxy soybean oil, and its flash-point is greater than 300 DEG C, and oxirane value is greater than 6.6; Other same experimental group.
2, result display, the plastic formula of comparative group 1 ~ 4 is difficult to be processed into U-PVC pipe fitting, and comparative group 2 can be processed into tubing (plastic conduit).
3, according to the regulation of GB/T10002.2-2003, the U-PVC plastic pipe of above-mentioned preparation and the various performances of tubing are tested.In addition, carry out continuous drop shutter test, add up each group of experiment number when there is rupture event, to evaluate the physicalies such as the crushing resistance of each set product, result is as shown in table 7.
Table 7
Claims (10)
1. a rigid PVC, is characterized in that, is made up of the component of following mass parts: polyvinyl chloride (PVC) RESINS 100 parts, solid plasticizer 0.5 ~ 5, thermo-stabilizer 1 ~ 6 part, processing modified adjuvant 1 ~ 5 part, impact-resistant modified auxiliary agent 2 ~ 10 parts, lubricant 0.1 ~ 2 part; Described solid plasticizer is the compound of the copolyreaction of polyethers and alcohol ester, or one or more mixtures in complex ester compounds.
2. rigid PVC according to claim 1, is characterized in that, be made up of the component of following mass parts: polyvinyl chloride (PVC) RESINS 100 parts, solid plasticizer 1.5 ~ 3 parts, thermo-stabilizer 3 ~ 6 parts, processing modified adjuvant 2 ~ 3 parts, impact-resistant modified auxiliary agent 2 ~ 5 parts, lubricant 1 ~ 2 part.
3. rigid PVC according to claim 1, is characterized in that, be made up of the component of following mass parts: polyvinyl chloride (PVC) RESINS 100 parts, solid plasticizer 1.5 parts, thermo-stabilizer 5 parts, processing modified adjuvant 2.5 parts, impact-resistant modified auxiliary agent 3 parts, lubricant 1.5 parts.
4. according to the arbitrary described rigid PVC of claims 1 to 3, it is characterized in that, described polyvinyl chloride (PVC) RESINS is that suspension method obtains, and the vinyl chloride-butyl acrylate compolymer in polyvinyl chloride (PVC) RESINS is less than 1.0mg/kg, and the viscosity of polyvinyl chloride (PVC) RESINS is 50ml/g ~ 110ml/g.
5. according to the arbitrary described rigid PVC of claims 1 to 3, it is characterized in that, described thermo-stabilizer is environment-friendly calcium zinc stabilizer;
Described processing modified adjuvant is the mixture of one or more in methylmethacrylate copolymer, σ-methylstyrene oligomers or vinylformic acid and cinnamic multipolymer;
Described impact-resistant modified auxiliary agent is the mixture of one or more in MBS graft copolymer, chlorinatedpolyethylene, ethylene-vinyl acetate copolymer or Polymers;
Described lubricant is one or more the combination in stearic acid, oxidized polyethlene wax, polyethylene wax or polyfunctional group fatty acid ester.
6. according to the arbitrary described rigid PVC of claims 1 to 3, it is characterized in that, described processing modified adjuvant is methylmethacrylate copolymer; Described impact-resistant modified auxiliary agent is methyl methacrylate/butadiene/styrene copolymers; Described lubricant is polyethylene wax.
7. the application of the arbitrary described rigid PVC of claim 1 ~ 6 in preparation U-PVC plastic pipe.
8. apply according to claim 7, described U-PVC plastic pipe is pressure-bearing class U-PVC plastic pipe.
9. the U-PVC plastic pipe prepared by claim 1 ~ 6 arbitrary described rigid polyvinyl chloride (U-PVC) plastics.
10. U-PVC plastic pipe according to claim 9, it is characterized in that, making method is as follows: after each feed composition mixing, carry out premix in input high-speed mixer obtain compound and heat, when the temperature of compound reaches 105 DEG C ~ 115 DEG C, discharge, then under 110 DEG C ~ 160 DEG C conditions, plasticizing, extruding pelletization form, and obtain finally by injection moulding machine injection moulding.
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| CN109370107A (en) * | 2018-10-23 | 2019-02-22 | 上海上塑控股（集团）有限公司 | A kind of high shock resistance type PVC-U pipe fitting and preparation method thereof |
| CN109971095A (en) * | 2019-04-08 | 2019-07-05 | 四川蜀羊防水材料有限公司 | A kind of non-migratory weather-proof exposed PVC/PE waterproof roll and preparation method thereof |
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