CN109575575A - Preparation process for anti-twist oil resistant robot cable material - Google Patents

Preparation process for anti-twist oil resistant robot cable material Download PDF

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Publication number
CN109575575A
CN109575575A CN201710897671.6A CN201710897671A CN109575575A CN 109575575 A CN109575575 A CN 109575575A CN 201710897671 A CN201710897671 A CN 201710897671A CN 109575575 A CN109575575 A CN 109575575A
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parts
speed
temperature
minutes
oil resistant
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Inventor
邹惠忠
景颖杰
马雪英
方拯宇
单永东
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Cgnpc Delta (jiangsu) Plastic Co Ltd
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Cgnpc Delta (jiangsu) Plastic Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04Polyurethanes
    • C08L75/06Polyurethanes from polyesters
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04Polyurethanes
    • C08L75/08Polyurethanes from polyethers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/302Polyurethanes or polythiourethanes; Polyurea or polythiourea
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/18Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20Oxides; Hydroxides
    • C08K3/22Oxides; Hydroxides of metals
    • C08K2003/2227Oxides; Hydroxides of metals of aluminium
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/38Boron-containing compounds
    • C08K2003/387Borates
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00Applications
    • C08L2203/20Applications use in electrical or conductive gadgets
    • C08L2203/202Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035Polymer 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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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Organic Insulating Materials (AREA)

Abstract

A kind of preparation process for anti-twist oil resistant robot cable material of the present invention, the following steps are included: by the degree of polymerization be 1300 polyvinyl chloride resin, purified terephthalic dibutyl ester, epoxidized soybean oil are, silane coupling agent puts into high-speed kneading machine, high-speed kneading 3 ~ 5 minutes, temperature was up to 90 ~ 100 DEG C;Low speed is mediated 0.5 ~ 2 minute again, after putting into antimony oxide, zinc borate, filler, aluminium hydroxide, calcium zinc heat stabilizer, antioxidant 1010, lubricant, modifier P551J simultaneously, high-speed kneading 4 ~ 8 minutes again, reach 120 DEG C to temperature, ethylene-vinyl acetate copolymer is put into kneader, it low speed 1 ~ 3 minute, is stirred to mixing and preplasticizing, discharge;When extrusion, the extruder temperature in twin-screw is 120 DEG C to 150 DEG C, screw speed 30Hz.The invention enables product both had the advantages that PVC product processing temperature is wide, plasticization temperature is low, and be made into cable sees that warping property can reach U-bend 20,000,000 times or more.

Description

Preparation process for anti-twist oil resistant robot cable material
Technical field
The present invention relates to environment-friendly cable material more particularly to anti-twist oil resistant robot cable material.
Background technique
With industrialized realization, information-based arrival, we initially enter the new era of kownledge economy.And with section The high speed development of technology, status of the robot in the Working Life of people is more and more prominent, such as in industry, medicine, agriculture There is important use in the fields such as industry, construction industry even military affairs.Currently, one is gradually approached to the concept of robot in the world It causes, is a kind of machine for realizing various functions by self power and control ability, task is to assist or replace human work Work.Robot is generally made of executing agency, driving device, detection device and control system.And between each device Link just needs different wire and cables to reach, and current robot wire and cable mainly has rubber, the macromolecules such as TPU, TPE Material composition, each material have different application range and function, and similar TPU cable material, itself has preferable oil resistant Property, various mechanical performances also comparative superiority, but its processing technology is not very rationality, processing temperature narrow range, once exceed or Lower than processing temperature, the appearance and performance of product after stranding can be all influenced, and the price of TPU CABLE MATERIALS itself is also relatively more high It is expensive, also limit its application.
Robot actually refers to the automatic installations for executing work, it can not only receive mankind commander, but also can transport The program of the preparatory layout of row, can also be according to the principle program action specified with artificial intelligence.Its task is to assist or replace The work of human work, such as production industry, construction industry or other dangerous work.It can be described as advanced integral traffic control opinion, Mechano-electronic, computer, material and bionic product have important use in the fields such as industry, agricultural or even military affairs at present On the way.
Robot cable is mainly made of polyvinyl chloride insulation, pvc sheath, copper mesh establishment, drag chain flexible cable.Its In, oversheath is mainly that special sheath is made in high flexibility mixing polyvinyl chloride and special material, has extremely strong oil resistivity.Extensively It, can be long-term applied to oil and etchant gas compared with electric tool and various mobile appliance equipment connecting lines is made under adverse circumstances occasion It works under immersion oil state, also, resist bending service life 500-1000 ten thousand times or more.Due to the high request of robot cable, Gu the selection to jacket material is extremely important, generally using macromolecules such as TPU, TPE, price is more expensive, processing performance Compare harsh.
Summary of the invention
The object of the present invention is to provide a kind of preparation process for anti-twist oil resistant robot cable material, this preparation processes The disadvantages of what is obtained is unstable to TPU CABLE MATERIALS processing performance for anti-twist oil resistant robot cable material pin, expensive comes Improved, carries out compounding blending by its polyvinyl chloride product relatively low and excellent processing performance with price, to reach Guaranteeing that its original mechanical performance do not reduce, processing performance improves, and the purpose that processing technology improves a series of is ground by this Work is sent out, the TPU product of production not only overcomes poor, expensive disadvantage of existing processing technology itself, largely On extend the range of its application, prospect is considerable.
To achieve the above object of the invention, the technical solution adopted by the present invention is that: one kind is for anti-twist oil resistant robot electricity The preparation process of cable material, including following two link:
First link the following steps are included:
Step 1: 100 parts of polyvinyl chloride resin, 10 ~ 30 parts of purified terephthalic dibutyl ester, epoxy soybean by the degree of polymerization for 1300 Oil is 5 ~ 10 parts of 2 ~ 5, silane coupling agent investment high-speed kneading machines, and high-speed kneading 3-5 minutes, temperature was up to 90 ~ 100 DEG C;
Step 2: low speed is mediated 0.5 ~ 2 minute again, while putting into 10 ~ 15 parts of antimony oxide, 10 ~ 20 parts of zinc borate, filler 10 ~ 20 parts, 10 ~ 15 parts of aluminium hydroxide, 5 ~ 8 parts of calcium zinc heat stabilizer, antioxidant 1010 be 0.2 ~ 0.4 part, lubricant 0.4 ~ 0.6 Part, after 0.8 ~ 1.2 part of modifier P551J, then high-speed kneading 4 ~ 8 minutes, reach 120 DEG C to temperature, by ethyl vinyl acetate In 10 ~ 20 parts of investment kneaders of ethylene copolymer, low speed 1 ~ 3 minute, stirred to mixing and preplasticizing, discharge;
Step 3: the extruder temperature in twin-screw is 120 DEG C to 150 DEG C, screw speed 30Hz when squeezing out;
Step 4: roller temperature is 160 DEG C when cracking;
Step 5: being granulated again with single screw rod pelletizer, single screw rod pelletizer set temperature is 80 DEG C to 100 DEG C;
Step 6: cooling sieving obtains particle.
Second link the following steps are included:
Step 1: by the first resulting particle of link step 6, with polyester-type TPU100 ~ 200 part, polyether-type TPU100 ~ 200 1 ~ 3 part of part, ethene-vinyl acetate and copolymer-maleic anhydride raw material are put in proportion into kneader, and high-speed kneading 2 minutes, It is uniformly mixed to particle, discharge;
Step 2: when extrusion, the extruder temperature in twin-screw is 140 DEG C to 170 DEG C, screw speed 35Hz;
Step 3: being granulated with single screw rod pelletizer again, and single screw rod pelletizer set temperature is 80 DEG C to 100 DEG C;
Step 4: cooling sieving obtains product.
The further improved technical solution of technical solution of above-mentioned high flexibility oil resistant robot cable material is as follows:
1. in above scheme, the lubricant in stearic acid, polyethylene wax, calcium stearate, zinc stearate at least one Kind.
2. in above scheme, the filler is calcium carbonate, talcum powder, kaolinic one or more mixture.
3. in above scheme, step 2 elder generation low speed is mediated 1 minute, then high-speed kneading 6 minutes, then low speed 2 minutes.
Due to the application of the above technical scheme, compared with the prior art, the invention has the following advantages:
1. high flexibility oil resistant robot cable material of the present invention and preparation method thereof, use the degree of polymerization for 1300 polyvinyl chloride resin 100,10 ~ 30 parts of purified terephthalic dibutyl ester, 10 ~ 15 parts of antimony oxide, 10 ~ 20 parts of zinc borate, 10 ~ 20 parts of filler, 10 ~ 15 parts of aluminium hydroxide, 5 ~ 8 parts of calcium zinc heat stabilizer and antioxidant 1010 are 0.2 ~ 0.4 part and are further added to 10-20 parts Ethylene-vinyl acetate copolymer, in the case where hardness is maintained at 85 shore A, flame retardant property reaches the CMR in the fire-retardant experiment of UL Grade after the cryogenic property of product makes product be made into line, can use, and will not open in subzero 30 DEG C of working environment It splits.
2. high flexibility oil resistant robot cable material of the present invention and preparation method thereof, formula is further added to polyester-type TPU100 ~ 200 part, polyether-type TPU100 ~ 200 part are blended with the first link PVC particle produced, overcome pure TPU The extrusion narrow range of product particle and high defect, so that product had both had, the processing temperature of PVC product was wide, plasticization temperature is low Advantage, and after TPU raw particles are blended with PVC granule, overcome the problem of TPU is intolerant to hydrolysis, 100 DEG C water-bath 7 days In the case of, physical property does not change substantially;Meanwhile joined in PVC product further addition polyester-type TPU100 ~ 200 part, Polyether-type TPU100 ~ 200 part, ethene-vinyl acetate and 1 ~ 3 part of copolymer-maleic anhydride, so that PVC has superior oil resistivity Can, can after 100 DEG C of 4 days resistance to oil degradations, the retention rate of intensity and elongation at break all 90% or more, meanwhile, resistance to scraped finish Performance is also greatly improved and (is scraped back and forth 100 times using needle is scraped in cable surface, no trace), after TPU particle is added Product, be made into cable sees that warping property can reach U-bend 20,000,000 times or more, selects 180 DEG C of distortion bendings 10,000,000 More than secondary.
The present invention will be further described below with reference to examples:
Embodiment 1 ~ 4: a kind of preparation process for anti-twist oil resistant robot cable material, including following two link:
First link the following steps are included:
Step 1: 100 parts of polyvinyl chloride resin, 10 ~ 30 parts of purified terephthalic dibutyl ester, epoxy soybean by the degree of polymerization for 1300 Oil is 5 ~ 10 parts of 2 ~ 5, silane coupling agent investment high-speed kneading machines, and high-speed kneading 3-5 minutes, temperature was up to 90 ~ 100 DEG C;
Step 2: low speed is mediated 1 minute again, while putting into 10 ~ 15 parts of antimony oxide, 10 ~ 20 parts of zinc borate, filler 10 ~ 20 Part, 10 ~ 15 parts of aluminium hydroxide, 5 ~ 8 parts of calcium zinc heat stabilizer, antioxidant 1010 are 0.2 ~ 0.4 part, 0.4 ~ 0.6 part of lubricant, add After 0.8 ~ 1.2 part of work modifying agent P551J, then high-speed kneading 6 minutes, reach 120 DEG C to temperature, ethene-vinyl acetate is copolymerized In 10 ~ 20 parts of investment kneaders of object, low speed 2 minutes, stirred to mixing and preplasticizing, discharge;
Step 3: the extruder temperature in twin-screw is 120 DEG C to 150 DEG C, screw speed 30Hz when squeezing out;
Step 4: roller temperature is 160 DEG C when cracking;
Step 5: being granulated again with single screw rod pelletizer, single screw rod pelletizer set temperature is 80 DEG C to 100 DEG C;
Step 6: cooling sieving obtains particle.
Second link the following steps are included:
Step 1: by the first resulting particle of link step 6, with polyester-type TPU100 ~ 200 part, polyether-type TPU100 ~ 200 1 ~ 3 part of part, ethene-vinyl acetate and copolymer-maleic anhydride raw material are put in proportion into kneader, and high-speed kneading 2 minutes, It is uniformly mixed to particle, discharge;
Step 2: when extrusion, the extruder temperature in twin-screw is 140 DEG C to 170 DEG C, screw speed 35Hz;
Step 3: being granulated with single screw rod pelletizer again, and single screw rod pelletizer set temperature is 80 DEG C to 100 DEG C;
Step 4: cooling sieving obtains product
Above-mentioned to be used for anti-twist oil resistant robot cable material, the group of following parts by weight is grouped as, as shown in table 1:
Table 1
The lubricant of embodiment 1 is stearic acid, and the lubricant of embodiment 2 is the mixture of polyethylene wax, calcium stearate, embodiment 3 lubricant is the mixture of polyethylene wax, zinc stearate, and the lubricant of embodiment 4 is calcium stearate;
The filler of embodiment 1 is the mixture of calcium carbonate, talcum powder, and the filler of embodiment 2 is talcum powder, the filler of embodiment 3 For kaolin, the filler of embodiment 4 is talcum powder, kaolinic mixture;
Above-mentioned modifier P551J is Mitsubishi Corporation of Japan production.
A kind of preparation method for high flexibility oil resistant robot cable material, including following two link:
First link
Step 1: 100 parts of polyvinyl chloride resin, 10 ~ 30 parts of purified terephthalic dibutyl ester, epoxy soybean by the degree of polymerization for 1300 Oil is 2 ~ 5, silane coupling agent and pigment put into high-speed kneading machine, and high-speed kneading 3-5 minutes, temperature was up to 90 ~ 100 DEG C;
Step 2: low speed is mediated 1 minute again, while putting into 10 ~ 15 parts of antimony oxide, 10 ~ 20 parts of zinc borate, filler 10 ~ 20 Part, 10 ~ 15 parts of aluminium hydroxide, 5 ~ 8 parts of calcium zinc heat stabilizer, antioxidant 1010 are 0.2 ~ 0.4 part, 0.4 ~ 0.6 part of lubricant, add After 0.8 ~ 1.2 part of work modifying agent P551J, then high-speed kneading 6 minutes, reach 120 DEG C to temperature, ethene-vinyl acetate is copolymerized In 10 ~ 20 parts of investment kneaders of object, low speed 2 minutes, stirred to mixing and preplasticizing, discharge;
Step 3: the extruder temperature in twin-screw is 120 DEG C to 150 DEG C, screw speed 30Hz when squeezing out;
Step 4: roller temperature is 160 DEG C when cracking;
Step 5: being granulated again with single screw rod pelletizer, single screw rod pelletizer set temperature is 80 DEG C to 100 DEG C;
Step 6: cooling sieving.
Second link
Step 1: the first link is produced into resulting particle, is put in proportion into kneader with 200 ~ 400 parts of raw materials of polyurethane In, it high-speed kneading 2 minutes, is uniformly mixed to particle, discharge;
Step 2: when extrusion, the extruder temperature in twin-screw is 140 DEG C to 170 DEG C, screw speed 35Hz;
Step 3: being granulated with single screw rod pelletizer again, and single screw rod pelletizer set temperature is 80 DEG C to 100 DEG C;
Step 4: cooling sieving obtains product.
The embodiment of the present invention 1,2,3 and 4 high flexibility oil resistant robot cable material obtained are tested, as a result with it is general Logical PVC cable material is as shown in table 2 compared to the data obtained:
Table 2
To sum up, high flexibility oil resistant robot cable material of the present invention and preparation method thereof, use the degree of polymerization for 1300 polyvinyl chloride resin 100,10 ~ 30 parts of purified terephthalic dibutyl ester, 10 ~ 15 parts of antimony oxide, 10 ~ 20 parts of zinc borate, 10 ~ 20 parts of filler, 10 ~ 15 parts of aluminium hydroxide, 5 ~ 8 parts of calcium zinc heat stabilizer and antioxidant 1010 are 0.2 ~ 0.4 part and are further added to 10-20 parts Ethylene-vinyl acetate copolymer, in the case where hardness is maintained at 85 shore A, flame retardant property reaches the CMR in the fire-retardant experiment of UL Grade after the cryogenic property of product makes product be made into line, can use, and will not open in subzero 30 DEG C of working environment It splits;Again, formula is further added to polyester-type TPU100 ~ 200 part, polyether-type TPU100 ~ 200 part, with the first link institute The PVC particle of production is blended, and the extrusion narrow range of pure TPU product particle is overcome and high defect, so that product both has After having the advantages that the processing temperature of PVC product is wide, plasticization temperature is low, and TPU raw particles are blended with PVC granule, overcome The problem of TPU is intolerant to hydrolysis, in the case where 100 DEG C water-bath 7 days, physical property does not change substantially;Meanwhile in PVC product It joined further addition polyester-type TPU100 ~ 200 part, polyether-type TPU100 ~ 200 part, ethene-vinyl acetate and maleic anhydride Copolymer 1 ~ 3 part, so that PVC has superior oil resistance, it can be after 100 DEG C of 4 days resistance to oil degradations, intensity and extension at break The retention rate of rate all 90% or more, meanwhile, the performance of resistance to scraped finish be also greatly improved (using scrape needle cable surface come It returns and scrapes 100 times, no trace), the product after TPU particle is added, be made into cable sees that warping property can reach U-bend It 20000000 times or more, selects 180 DEG C of distortions bendings 10,000,000 times or more.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.

Claims (5)

1. a kind of preparation process for anti-twist oil resistant robot cable material, it is characterised in that: including following two link:
First link the following steps are included:
Step 1: 100 parts of polyvinyl chloride resin, 10 ~ 30 parts of purified terephthalic dibutyl ester, epoxy soybean by the degree of polymerization for 1300 Oil is 5 ~ 10 parts of 2 ~ 5 parts, silane coupling agent investment high-speed kneading machines, and high-speed kneading 3 ~ 5 minutes, temperature was up to 90 ~ 100 DEG C;
Step 2: low speed is mediated 0.5 ~ 2 minute again, while putting into 10 ~ 15 parts of antimony oxide, 10 ~ 20 parts of zinc borate, filler 10 ~ 20 parts, 10 ~ 15 parts of aluminium hydroxide, 5 ~ 8 parts of calcium zinc heat stabilizer, antioxidant 1010 be 0.2 ~ 0.4 part, lubricant 0.4 ~ 0.6 Part, after 0.8 ~ 1.2 part of modifier P551J, then high-speed kneading 4 ~ 8 minutes, reach 120 DEG C to temperature, by ethyl vinyl acetate In 10 ~ 20 parts of investment kneaders of ethylene copolymer, low speed 1 ~ 3 minute, stirred to mixing and preplasticizing, discharge;
Step 3: the extruder temperature in twin-screw is 120 DEG C to 150 DEG C, screw speed 30Hz when squeezing out;
Step 4: roller temperature is 160 DEG C when cracking;
Step 5: being granulated again with single screw rod pelletizer, single screw rod pelletizer set temperature is 80 DEG C to 100 DEG C;
Step 6: cooling sieving obtains particle.
2. second link the following steps are included:
Step 1: by the first resulting particle of link step 6, with polyester-type TPU100 ~ 200 part, polyether-type TPU100 ~ 200 1 ~ 3 part of part, ethene-vinyl acetate and copolymer-maleic anhydride raw material are put in proportion into kneader, and high-speed kneading 2 minutes, It is uniformly mixed to particle, discharge;
Step 2: when extrusion, the extruder temperature in twin-screw is 140 DEG C to 170 DEG C, screw speed 35Hz;
Step 3: being granulated with single screw rod pelletizer again, and single screw rod pelletizer set temperature is 80 DEG C to 100 DEG C;
Step 4: cooling sieving obtains product.
3. the preparation process according to claim 1 for anti-twist oil resistant robot cable material, it is characterised in that: described Filler is calcium carbonate, talcum powder, kaolinic one or more mixture.
4. the preparation process according to claim 1 for anti-twist oil resistant robot cable material, it is characterised in that: described Lubricant is selected from least one of stearic acid, polyethylene wax, calcium stearate, zinc stearate.
5. the preparation process according to claim 1 for anti-twist oil resistant robot cable material, it is characterised in that: described Step 2 elder generation low speed is mediated 1 minute, then high-speed kneading 6 minutes, then low speed 2 minutes.
CN201710897671.6A 2017-09-28 2017-09-28 Preparation process for anti-twist oil resistant robot cable material Pending CN109575575A (en)

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CN106380820A (en) * 2016-08-31 2017-02-08 安徽中润电缆集团股份有限公司 Composite cable material having modified quartz powder for improving oil resistance

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Title
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周祥兴等: "《实用塑料包装制品手册》", 30 July 2000, 中国轻工业出版社 *
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