Summary of the invention
The objective of the invention is provides a kind of steel-pipeline outer-layer anticorrosive polyethylene compound and preparation method thereof at the deficiencies in the prior art.
For realizing above purpose, technology ten thousand cases of the present invention provide a kind of steel-pipeline outer-layer anticorrosive polyethylene compound, it is characterized in that, are made up of following raw material in weight part:
High-density polyethylene resin: 45~80;
Linear low density polyethylene resin: 15~45;
Oxidation inhibitor 0.3~1;
Processing aid 0.5~1.5;
Functional agglomerate 1~3;
Carbon black master batch 3~7;
Wherein, high-density polyethylene resin is at least a mixture in tubing level high-density polyethylene resin and big-and-middle vacant level high-density polyethylene resin, film-grade high-density polyethylene resin, wire drawing level high-density polyethylene resin and the little hollow level high-density polyethylene resin.
Described oxidation inhibitor is made up of primary antioxidant and auxiliary antioxidant, and primary antioxidant is a Hinered phenols antioxidant, and auxiliary antioxidant is a phosphite oxidation inhibitor.Oxidation inhibitor guarantees that material has satisfactory stability in the processing use, avoids thermooxidative degradation to cause material property to reduce.
Described Hinered phenols antioxidant is an antioxidant 1010.
Described phosphite oxidation inhibitor is oxidation inhibitor 168.
Described processing aid is a lubricant.Energy consumption when lubricant can reduce plastic working reduces internal friction produces in the course of processing heat and mechanical stress, thereby improves the thermostability of plastics.
Described lubricant is the mixture of internal lubricant calcium stearate and external lubricant PE wax.
Described functional agglomerate is a fluoropolymer.The adding of functional agglomerate can reduce surface imperfection, as phenomenons such as common melt fracture, burrs, improves product surface luminance brightness and slickness, makes color divergence more even, improves glossiness and reduces an elimination mouthful mould buildup phenomenon.
The present invention also provides the preparation method of above-mentioned steel-pipeline outer-layer anticorrosive polyethylene compound, it is characterized in that, concrete steps are: high-density polyethylene resin, linear low density polyethylene resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute, restir three minutes, the Preblend that stirs is sent in the twin screw extruder extruding pelletization.
The present invention has the following advantages:
Compared with prior art, the present invention has used part film-grade high density polyethylene(HDPE) to substitute tubing level polyethylene, and this change can reduce cost on the one hand, improves melt ductility on the other hand, the glossiness on tablet surface after the increase moulding.
Compared with prior art, the present invention has used the big-and-middle vacant level high density polyethylene(HDPE) of part to substitute tubing level polyethylene, and the mechanical property of product significantly improves after evidence partly substitutes, and normal temperature and the test of pyritous penetration hardness are much better than like product.
Compared with prior art, the present invention has used the little hollow level high-density polyethylene of part to substitute tubing level polyethylene, has increased the melt flow rate (MFR) of product, has improved the processing characteristics of product.
Compared with prior art, the present invention has used part wire drawing level high-density polyethylene to substitute tubing level polyethylene, utilizes wire drawing level polyethylene melt viscoelasticity good, and the advantage that elongation at break is high has guaranteed production stability in the anticorrosion processing of small-bore pipeline.
Compared with prior art, the present invention has adopted and added a certain proportion of linear low density polyethylene in prescription, has improved the environmental stress cracking resistance of product greatly.
Compared with prior art, it is the functional agglomerate of foundation structure with the fluoropolymer that the present invention has added a spot of in prescription, eliminated tangerine peel and scalelike mark (melt fracture) phenomenon that like product has, the luminance brightness and the slickness of product surface after the moulding and thickness evenness and the dimensional stability of extruding tablet all have been significantly improved.
In addition, raw material sources variation of the present invention, supply is stable, low price; Setting ranges such as thermotolerance, hardness, flowability are wide, can adapt to the differentiation requirement of domestic and international disparity items to product performance; The technology setting range is wide, can adapt to dissimilar extruder screws.
Embodiment
Specify the present invention below in conjunction with embodiment.
Embodiment 1
A kind of steel-pipeline outer-layer anticorrosive polyethylene compound, form by following raw material in weight part:
Tubing level high-density polyethylene: 30
Film-grade high density polyethylene(HDPE): 20
Little hollow level high-density polyethylene: 15
Linear low density polyethylene: 25
Carbonarius mother: 4.5
Functional agglomerate: 1
Processing aid: 1.5
Oxidation inhibitor: 0.5
Wherein, described tubing level high-density polyethylene is the TR480AT type high density polyethylene(HDPE) that Shanghai Jin Fei company limited produces.
Described film-grade high density polyethylene(HDPE) is the HD5301AA type high density polyethylene(HDPE) that Shanghai Sai Ke company limited produces.
Described little hollow level high-density polyethylene is the HHM5502 type high density polyethylene(HDPE) that Shanghai Sai Ke company limited produces.
The 7042 molded lines new LDPE (film grade)s that described linear low density polyethylene is produced for Jilin Petrochemical company limited.
Described carbonarius mother is the 2080 type carbonarius mothers that Foshan color Le Fu company limited produces.
Described oxidation inhibitor is the antioxidant 1010 of Ningbo gold Hai Yabao company limited production and the mixture of oxidation inhibitor 168, and weight percent is 1: 1.
Described functional agglomerate is the PPA type functional agglomerate that Minnesota Mining and Manufacturing Company produces.
Described lubricant comprises internal lubricant calcium stearate and external lubricant PE wax, and weight percent is 1: 2.
The preparation method of above-mentioned mixing material is as follows: polyvinyl resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute, restir three minutes, the Preblend that stirs is sent in the twin screw extruder, the high speed shear of twin screw and mixing down, material is able to sufficient fusing, compound, extruding pelletization again, is finally packaged as finished product.
This product is matrix resin with the polyethylene, and suitable processing temperature is 200~240 ℃, and the finished product of unpacking should once use up, and produces the pit phenomenon when avoiding taking place the moisture absorption and causing extruding.Extrude the temperature precise control that should guarantee forcing machine when producing.
Embodiment 2
A kind of steel-pipeline outer-layer anticorrosive polyethylene compound, form by following raw material in weight part:
Tubing level high-density polyethylene: 40
Big-and-middle vacant level high density polyethylene(HDPE): 28
Linear low density polyethylene: 22
Carbonarius mother: 5
Functional agglomerate: 3
Processing aid: 1.5
Oxidation inhibitor: 0.5
Wherein, described tubing level high-density polyethylene is the TR480M type high density polyethylene(HDPE) that Maoming petrochemical industry company limited produces.
Described big-and-middle vacant level high density polyethylene(HDPE) is the HXM 50100 type high density polyethylene(HDPE)s that Shanghai Sai Ke company limited produces.
Described linear low density polyethylene is the 0220AA molded lines new LDPE (film grade) that Shanghai Sai Ke company limited produces.
Described carbonarius mother is the M9001 type carbonarius mother that the capable company limited of intention produces.
Described oxidation inhibitor is the antioxidant 1010 of Ningbo gold Hai Yabao company limited production and the mixture of oxidation inhibitor 168, and weight percent is 1: 1.
Described functional agglomerate is the PPA type functional agglomerate that Minnesota Mining and Manufacturing Company produces.
Thawing machine calcium stearate and external lubricant PE wax in described lubricant comprises, weight percent is 1: 2.
The preparation method of above-mentioned mixing material is as follows: polyvinyl resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute, restir three minutes, the Preblend that stirs is sent in the twin screw extruder, the high speed shear of twin screw and mixing down, material is able to sufficient fusing, compound, extruding pelletization again, is finally packaged as finished product.
This product is matrix resin with the polyethylene, and suitable processing temperature is 200~240 ℃, and the finished product of unpacking should once use up, and produces the pit phenomenon when avoiding taking place the moisture absorption and causing extruding.Extrude the temperature precise control that should guarantee forcing machine when producing.
Embodiment 3
A kind of steel-pipeline outer-layer anticorrosive polyethylene compound, form by following raw material in weight part:
Tubing level high-density polyethylene: 40
Wire drawing level high-density polyethylene: 20
Linear low density polyethylene: 30.5
Carbonarius mother: 5
Functional agglomerate: 2.5
Processing aid: 1.5
Oxidation inhibitor: 0.5
Wherein, described tubing level high-density polyethylene is the HD4801EX type high density polyethylene(HDPE) of Dushanzi company limited production.
Described wire drawing level high-density polyethylene is to raise the 5000S type high density polyethylene(HDPE) that sub-petro-chemical corporation produces.
Described linear low density polyethylene is the 0209AA molded lines new LDPE (film grade) that Panjin petrochemical industry company limited produces.
The female 2772 type carbonarius mothers of described carbonarius for the production of Cabot company limited.
Described oxidation inhibitor is the antioxidant 1010 of Ningbo gold Hai Yabao company limited production and the mixture of oxidation inhibitor 168, and weight percent is 1: 1.
Described functional agglomerate is the PPA type functional agglomerate that Minnesota Mining and Manufacturing Company produces.
Described lubricant comprises internal lubricant calcium stearate and external lubricant PE wax, and weight percent is 1: 2.
The preparation method of above-mentioned mixing material is as follows: polyvinyl resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute, restir three minutes, the Preblend that stirs is sent in the twin screw extruder, the high speed shear of twin screw and mixing down, material is able to sufficient fusing, compound, extruding pelletization again, is finally packaged as finished product.
This product is matrix resin with the polyethylene, and suitable processing temperature is 200~240 ℃, and the finished product of unpacking should once use up, and produces the pit phenomenon when avoiding taking place the moisture absorption and causing extruding.Extrude the temperature precise control that should guarantee forcing machine when producing.
Embodiment 4
A kind of steel-pipeline outer-layer anticorrosive polyethylene compound, form by following raw material in weight part:
Tubing level high-density polyethylene resin: 20;
Big-and-middle vacant level high density polyethylene(HDPE) 20
Film-grade high density polyethylene(HDPE) 20
Little hollow level high-density polyethylene 20
Linear low density polyethylene resin: 15;
Oxidation inhibitor 0.3;
Processing aid 0.5;
Functional agglomerate 1;
Carbon black master batch 3;
Wherein, described tubing level high-density polyethylene is 2480 type high density polyethylene(HDPE)s of Qilu Petrochemical company limited production.
Described big-and-middle vacant level high density polyethylene(HDPE) is the 5421B type high density polyethylene(HDPE) that shell company limited of CNOOC produces.
The 9455F type high density polyethylene(HDPE) that described film-grade high density polyethylene(HDPE) is produced for Jilin Petrochemical company limited.
The 6200NT7 type high density polyethylene(HDPE) that described little hollow level high-density polyethylene is produced for DOW Chemical company limited.
The 7042 molded lines new LDPE (film grade)s that described linear low density polyethylene is produced for Jilin Petrochemical company limited.
Described carbonarius mother is the NB9705 type carbonarius mother that Korea S friend's star company limited produces.
Described oxidation inhibitor is the antioxidant 1010 of Ningbo gold Hai Yabao company limited production and the mixture of oxidation inhibitor 168, and weight percent is 1: 1.
Described functional agglomerate is the PPA type functional agglomerate that Minnesota Mining and Manufacturing Company produces.
Thawing machine calcium stearate and external lubricant PE wax in described lubricant comprises, weight percent is 1: 2.
The preparation method is as follows: polyvinyl resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute, restir three minutes, the Preblend that stirs is sent in the twin screw extruder, the high speed shear of twin screw and mixing down, material is able to sufficient fusing, compound, extruding pelletization again, is finally packaged as finished product.
This product is matrix resin with the polyethylene, and suitable processing temperature is 200~240 ℃, and the finished product of unpacking should once use up, and produces the pit phenomenon when avoiding taking place the moisture absorption and causing extruding.Extrude the temperature precise control that should guarantee forcing machine when producing.
Embodiment 5
A kind of steel-pipeline outer-layer anticorrosive polyethylene compound, form by following raw material in weight part:
Tubing level high-density polyethylene resin: 15;
Big-and-middle vacant level high density polyethylene(HDPE) 10
Film-grade high density polyethylene(HDPE) 10
Little hollow level high-density polyethylene 10
Linear low density polyethylene resin: 45;
Oxidation inhibitor 1;
Processing aid 1.5;
Functional agglomerate 3;
Carbon black master batch 7;
Wherein, described tubing level high-density polyethylene is 2480 type high density polyethylene(HDPE)s of Qilu Petrochemical company limited production.
Described big-and-middle vacant level high density polyethylene(HDPE) is the 5121B type high density polyethylene(HDPE) that shell company limited of CNOOC produces.
Described film-grade high density polyethylene(HDPE) is the TR144 type high density polyethylene(HDPE) that Chevron Fei Lipusi company limited produces.
The 6200NT7 type high density polyethylene(HDPE) that described little hollow level high-density polyethylene is produced for DOW Chemical company limited.
Described linear low density polyethylene is the 0209AA molded lines new LDPE (film grade) that Panjin petrochemical industry company limited produces.
Described carbonarius mother is the NB9705 type carbonarius mother that Korea S friend's star company limited produces.
Described oxidation inhibitor is the antioxidant 1010 of Ningbo gold Hai Yabao company limited production and the mixture of oxidation inhibitor 168, and weight percent is 1: 1.
Described functional agglomerate is the PPA type functional agglomerate that Minnesota Mining and Manufacturing Company produces.
Thawing machine calcium stearate and external lubricant PE wax in described lubricant comprises, weight percent is 1: 2.
The preparation method is as follows: polyvinyl resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute, restir three minutes, the Preblend that stirs is sent in the twin screw extruder, the high speed shear of twin screw and mixing down, material is able to sufficient fusing, compound, extruding pelletization again, is finally packaged as finished product.
This product is matrix resin with the polyethylene, and suitable processing temperature is 200~240 ℃, and the finished product of unpacking should once use up, and produces the pit phenomenon when avoiding taking place the moisture absorption and causing extruding.Extrude the temperature precise control that should guarantee forcing machine when producing.
The performance test results of product of the present invention is as follows: