CN103965551A

CN103965551A - Formula and processing technology of PP-R pipe

Info

Publication number: CN103965551A
Application number: CN201410140974.XA
Authority: CN
Inventors: 蒋伟斌
Original assignee: Wei Xingguan Industry Of Anhui Province LLC
Current assignee: Wei Xingguan Industry Of Anhui Province LLC
Priority date: 2014-04-10
Filing date: 2014-04-10
Publication date: 2014-08-06

Abstract

The invention discloses a formula and processing technology of a PP-R pipe. The PP-R pipe comprises the following components: 97%-99.65% of polypropylene randon coplymer, 0.1%-1% of pentaerythritol ester, 0.2%-1.5% of auxiliary antioxygen DLTP and 0.05%-0.5% of a nucleator TMB-4. According to the formula and the processing technology of the PP-R pipe, the melting temperature range is wide during processing, and the forming machinability is good. Besides, the PP-R pipe has the advantages of good toughness and cold-resistance, high impact property and better transparency, and also has the following properties of a polypropylene pipe including resistance to acid, alkali, chemical corrosion, heat, low temperature, impact, ageing and light.

Description

A kind of PP-R formulating of recipe for pipes and complete processing

Technical field

The present invention relates to PP-R tubing field, relate in particular to a kind of PP-R formulating of recipe for pipes and complete processing.

Background technology

Ethylene/propylene olefinic random copolymer is carried out polyreaction simultaneously and is made by ethylene molecule and propylene molecules, reactor used with produce the same of PP homopolymer.Ethylene molecule is less than propylene molecules, and reaction is faster than (approximately ten times of reactive behavioies) propylene.This weakens the stereospecificity of catalyzer and active increase.Thereby cause Atactic Polypropelene growing amount to increase.Atactic copolymerized polypropene performance characteristics: along with the increase of ethylene content, its rigidity and shock strength increase, add man-hour melt temperature wide, forming process is better, its goods have toughness, winter hardiness, the feature such as the high and transparency of impact property is better, but its fusing point brittleness temperature, rigidity and degree of crystallinity are lower.

Modified polypropene refers to the method for acrylic resin being passed through to physics or chemistry, makes its performance that the variation of expection occur, or gives the function that material is new and the resin obtaining.The tubing of producing taking modified polypropene material is as modified polypropene pipe.This modified polypropylene pipes, except having the performance of acidproof, alkaline-resisting, resistance to chemical attack, good heat resistance of polypropylene pipe, also has low-temperature impact resistance, ageing resistance and light fastness.The purposes of modified polypropene pipe is identical with the effective way of plain polypropylene, water supply pipe, chemical liquid and transfer of gas, and agricultural irrigation and drainage, heat exchanger tube and solar energy heat exchanger pipe etc., but its performance is better than plain polypropylene pipe.

Summary of the invention

Object of the present invention is just to provide in order to address the above problem a kind of PP-R formulating of recipe for pipes and complete processing.

The present invention is achieved through the following technical solutions above-mentioned purpose:

A kind of PP-R formulating of recipe for pipes, comprise atactic copolymerized polypropene, four tetramethylolmethane vinegar, nucleator TMB-4 and auxiliary antioxidant DLTP, wherein: atactic copolymerized polypropene content is 97%-99.65%, four tetramethylolmethane vinegar content are 0.1%-1%, auxiliary antioxidant DLTP content is 0.2%-1.5%, and nucleator TMB-4 is 0.05%-0.5%.

A kind of PP-R tubing complete processing, comprises the following steps:

(1) first,, according to the feature of PPR tubing service performance and environment for use, select PPR resin PP Pipe Compound to meet main service requirements, select again various auxiliary agents, improve processing characteristics, improve use properties, or saving material, thereby complete the formula of PPR tubing

(2) then by PPR pipe moulding material formula requirement, the mixing section of various raw materials and the last defeated people's high-speed mixer of auxiliary agent meter through high-speed mixing stir various blend compositions are mixed after, send into and be in harmony but mixing machine, high-temperature material is cooled under certain temperature, then input in forcing machine hopper, in hopper, raw material enters in people's extruder barrel via machine barrel opening for feed, and along with the rotation of screw rod, raw material is forced to push to machine barrel front.Because machine barrel front end has filtering net, porous plate, and the resistance of forming mould, add dwindling gradually of screw flight groove volume, raw material transport dynamic resistance is increased along with the increase of inventory, raw material be stressed increasingly, simultaneously raw material is also subject to the impact of machine barrel external heat and is squeezed in machine barrel, shear, stirring action, adds raw material and machine barrel, the phase mutual friction between raw material, raw material temperature in machine barrel is raise, finally become viscous state.Reach plasticizing completely.With screw rod rotation, molten materials equipressure. equivalent push moulded products mould, then extrude from mould mouth.Moulding PPR plastic pipe.

(3) pipe is through cooling, and sizing, draws, and shaping pipe is pressed certain length again and cut off, then coding, and inspection warehouse-in, completes PP-R tube extrusion and produces.

(4) waste material producing in production process can connect pulverizing in road, then defeated people in forcing machine, and virgin material blending, again extrusion moulding.

Beneficial effect of the present invention is:

The present invention is a kind of PP-R formulating of recipe for pipes and complete processing, adding, man-hour melt temperature is wide, forming process is better, its goods have toughness, winter hardiness, high and the good advantage of transparency of impact property, and have outside the performance of acidproof, alkaline-resisting, resistance to chemical attack, good heat resistance of polypropylene pipe, low-temperature impact resistance, ageing resistance and light fastness also there is.

Embodiment

The present invention is a kind of PP-R formulating of recipe for pipes, comprise atactic copolymerized polypropene, four tetramethylolmethane vinegar, nucleator TMB-4 and auxiliary antioxidant DLTP, wherein: atactic copolymerized polypropene content is 97%-99.65%, four tetramethylolmethane vinegar content are 0.1%-1%, auxiliary antioxidant DLTP content is 0.2%-1.5%, and nucleator TMB-4 is 0.05%-0.5%.

The present invention selects atactic copolymerized polypropene to ask major ingredient, and the material that helps used should be good with resin dedicated consistency, and can make up some resin dedicated deficiency, and auxiliary agent comprises four tetramethylolmethane vinegar, auxiliary antioxidant DLTP, and nucleator TMB-4, its performance effect is as follows:

Four tetramethylolmethane vinegar: white powder, fusing point 119-122 degree Celsius, micro-poison, non-volatile, do not pollute, good heat resistance, this oxidation inhibitor antioxidant effect is good, is the most frequently used oxidation inhibitor, add-on is generally 0.1%-1%, and normal and auxiliary antioxidant DLTP is collaborative to be used, and can save primary antioxidant consumption.Add that people's oxidation inhibitor can prevent that raw material from contacting with oxygen in air in moulding process and autoxidation degraded.

Auxiliary antioxidant DLTP: white crystalline powder, 380 degrees Celsius of fusing points, smell is little, and volatilization is little, micro-poison, Chang Yusi tetramethylolmethane vinegar use, mixing ratio is main: auxiliary=3:7, adds people 0.2%-1.5% the most.

Nucleator TM B-4: can improve the degree of crystallinity of goods, improve the impact property of goods, the mechanical properties such as creep resistance, improve work-ing life.

A kind of PP-R tubing complete processing, comprises the following steps:

(2) then by PPR pipe moulding material formula requirement, the mixing section of various raw materials and the last defeated people's high-speed mixer of auxiliary agent meter through high-speed mixing stir various blend compositions are mixed after, send into and be in harmony but mixing machine, high-temperature material is cooled under certain temperature, then inputting in forcing machine hopper raw material in (also having a kind of technique is that the material mixing is inputted in forcing machine hopper after forcing machine mixing granulator again) hopper enters in people's extruder barrel via machine barrel opening for feed, along with the rotation of screw rod, raw material is forced to push to machine barrel front.Because machine barrel front end has filtering net, porous plate, and the resistance of forming mould, add dwindling gradually of screw flight groove volume, raw material transport dynamic resistance is increased along with the increase of inventory, raw material be stressed increasingly, simultaneously raw material is also subject to the impact of machine barrel external heat and is squeezed in machine barrel, shear, stirring action, adds raw material and machine barrel, the phase mutual friction between raw material, raw material temperature in machine barrel is raise, finally become viscous state.Reach plasticizing completely.With screw rod rotation, molten materials equipressure. equivalent push moulded products mould, then extrude from mould mouth.Moulding PPR plastic pipe.

Technical scheme of the present invention is not limited to the restriction of above-mentioned specific embodiment, and the technology distortion that every technical scheme according to the present invention is made, within all falling into protection scope of the present invention.

Claims

1. a PP-R formulating of recipe for pipes, it is characterized in that, comprise the poly-interior alkene of random copolymerization, four tetramethylolmethane vinegar, nucleator TMB-4 and auxiliary antioxidant DLTP, wherein: atactic copolymerized polypropene content is 97%-99.65%, four tetramethylolmethane vinegar content are 0.1%-1%, auxiliary antioxidant DLTP content is 0.2%-1.5%, and nucleator TMB-4 is 0.05%-0.5%.

2. a PP-R tubing complete processing as claimed in claim 1, is characterized in that, comprises the following steps: