CN104072881B - A kind of thermoplasticity fretting map vibration-absorptive material and preparation method thereof - Google Patents

A kind of thermoplasticity fretting map vibration-absorptive material and preparation method thereof Download PDF

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CN104072881B
CN104072881B CN201310103357.8A CN201310103357A CN104072881B CN 104072881 B CN104072881 B CN 104072881B CN 201310103357 A CN201310103357 A CN 201310103357A CN 104072881 B CN104072881 B CN 104072881B
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parts
deg
thermoplasticity
foaming
fretting map
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CN104072881A (en
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杨桂生
郭学林
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滁州格美特科技有限公司
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10Homopolymers or copolymers of propene
    • C08L23/14Copolymers of propene
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
    • C08J3/00Processes of treating or compounding macromolecular substances
    • C08J3/20Compounding polymers with additives, e.g. colouring
    • C08J3/22Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/226Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102Azo-compounds
    • C08J9/103Azodicarbonamide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76494Controlled parameter
    • B29C2945/76498Pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76494Controlled parameter
    • B29C2945/76531Temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76494Controlled parameter
    • B29C2945/76551Time
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
    • C08J2203/00Foams characterized by the expanding agent
    • C08J2203/04N2 releasing, ex azodicarbonamide or nitroso compound
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
    • C08J2323/00Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10Homopolymers or copolymers of propene
    • C08J2323/14Copolymers of propene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00Applications
    • C08L2203/14Applications used for foams
    • 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
    • C08L2205/025Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • 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
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00Properties characterising the ingredient of the composition
    • C08L2207/04Thermoplastic elastomer
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00Properties characterising the ingredient of the composition
    • C08L2207/06Properties of polyethylene
    • C08L2207/066LDPE (radical process)

Abstract

The invention belongs to processing of high molecular material technical field, is related to a kind of thermoplasticity fretting map vibration-absorptive material and preparation method thereof.The vibration-absorptive material is made up of the component comprising following parts by weight:80~100 parts of polypropylene, 50~80 parts of thermoplastic elastomer (TPE), 8~15 parts of filler, 1~2 part of antioxidant, 12~25 parts of viscosity modifier, 10~18 parts of foaming master batch, 0.8~1.5 part of dispersant.The present invention thermoplasticity fretting map vibration-absorptive material use thermoplastic elastomer (TPE) and viscosity modifier composite modified polypropylene, reach simultaneously toughness reinforcing, strengthen purpose, and add foaming master batch progress injection foaming, uniform in foaming, product surface it is attractive in appearance.The simple raw material of inventive formulation is easy to get, and cost is cheap;Preparation method is simple to operate, and process conditions are easy to control, and operating cost is low, and production efficiency is high, good product performance;Product can have a wide range of applications in the industry such as packaging, building, auto industry, aerospace industries and sports equipment.

Description

A kind of thermoplasticity fretting map vibration-absorptive material and preparation method thereof

Technical field

The invention belongs to processing of high molecular material technical field, is related to a kind of thermoplasticity fretting map vibration-absorptive material and its preparation Method.

Background technology

Micro-foaming material refers to using polymeric material as matrix, wherein containing abscess-size from micro- to tens less than one micron The porous polymer material of rice.Foamed plastics prepared by conventional physically or chemically foaming is because its aperture is larger, generally not Belong to this category, compared with the millimetre-sized abscess of general foamed plastics, the abscess of fretting map polymer is much smaller, and abscess Density is much greater, thus referred to as fretting map polymeric material.Fretting map thermoplastic elastomer (TPE) has good mechanical property because of it Energy, excellent heat resistance, resistant to chemical media, weatherability and resistance to ag(e)ing have been applied to the field of shock absorption of high-speed railway, But being prepared with chemical blowing process for being commonly used does not have independent bubble in pure foamed thermoplastic elastomers, bubble compared with Greatly and remain that chemical substance, its mechanical property etc. is unstable, the needs of high ferro damping can't be fully met.It is existing Rubber blanket, EVA pads, TPU pads have been difficult the damping requirement for meeting growing high-speed railway, and service life is also short;And work Though engineering plastics cause its damping effect poor with higher-strength but the pliability of itself and dynamic mechanical.

The content of the invention

The defects of it is an object of the invention to overcome prior art provide a kind of thermoplasticity fretting map vibration-absorptive material and Its preparation method.

To achieve the above object, the technical solution adopted by the present invention is as follows:

A kind of thermoplasticity fretting map vibration-absorptive material, is made up of the component comprising following parts by weight:

Described polypropylene is selected from COPP, and its melt index is 1.5~3g/10min.

Described thermoplastic elastomer (TPE) is selected from thermoplastic polyester elastomer(TPEE), thermoplasticity EPDM dynamic vulcanization bullet Property body(TPV)Or thermoplastic styrene class elastomer(TPS)In one or more;Wherein, thermoplastic polyester elastomer (TPEE)Formed by terephthalic acid (TPA) Isosorbide-5-Nitrae butanediol and the copolymerization of poly- butanol, thermoplasticity EPDM dynamic vulcanization elastomer(TPV) It is dispersed in polypropylene plastics matrix and is formed by ethylene propylene diene rubber particulate, thermoplastic styrene class elastomer(TPS)For fourth two The copolymer of alkene or isoprene and styrene block type.

One or more of the described filler in titanium dioxide, mica, talcum powder or silica.

Described antioxidant be selected from thio-2 acid octadecyl ester, [β-(3,5 di-t-butyl 4- hydroxy-phenies)Propionic acid] season penta Four alcohol esters, dilauryl thiodipropionate or 4,4 '-thio(6- tertiary butyl -3- methylphenols)In one or more.

Described viscosity modifier is selected from low density polyethylene (LDPE), acrylonitrile-butadiene-styrene terpolymer or second One or more in alkene-acetate ethylene copolymer.

One or more of the described dispersant in oleic acid, Tissuemat E or stearic acid.

Described foaming master batch is made up of the component comprising following parts by weight:

Described foaming agent is azodicarbonamide.

Described nucleator is talcum powder.

Described cladding is ethylene-vinyl acetate copolymer.

Described foaming master batch vector resin is low density polyethylene (LDPE).

A kind of preparation method of above-mentioned thermoplasticity fretting map vibration-absorptive material, comprises the following steps:

(1)Prepare foaming master batch:15~25 parts of foaming agent, 45~60 parts of nucleator, 30~45 parts of cladding, foaming is female After grain 100 parts of addition homogenizers of vector resin are sufficiently mixed uniformly, are extruded, be granulated using double screw extruder;Extrusion temperature Spend for 140~150 DEG C, screw speed 40r/min;

(2)Prepare base-material:By 80~100 parts of polypropylene, 50~80 parts of thermoplastic elastomer (TPE), 8~15 parts of filler, antioxidant 1~2 part, 12~25 parts of viscosity modifier, 0.8~1.5 part of addition mixer high speed of dispersant is stirred 5~8min, so After be added to double screw extruder and be granulated;Rotating speed is 180~240r/min, and temperature is set as 180~190 DEG C, and water cooling is drawn Bar pelletizing is into base-material;

(3)Injection foaming:The base-material prepared in step 2 is taken, then adds 10~18 parts of foaming master batch to be mixed to join injector Hopper injection foaming obtains product.

Described step(1)Middle double screw extruder diameter 76mm, draw ratio 40;

Described step(3)The concrete technology of middle injection foaming is:Injector drying temperature is 80~90 DEG C, injection pressure For 55~65MPa, injection time is 1~2 second, and barrel zone temperature is 185~195 DEG C, 190~200 DEG C, 175~185 DEG C respectively, Nozzle temperature is 185~195 DEG C, and mold temperature is 20~30 DEG C.

The prescription of fretting map vibration-absorptive material provided by the invention is simple, raw material is easy to get, cost is cheap, and the items of product It is functional.The shaped article of the present invention is the closed pore fretting map elastomeric article that aperture is tens microns, and its smooth in appearance is put down It is whole, there is the advantages of independent bubble, foaming is smaller, without chemical residue.The shaped article of the present invention can loss of weight simultaneously 10%-40%, when being hit, the energy of absorption can increase 3-5 times, can be passivated original crack tip, so as to improve material The toughness of material and endurance life-span, the requirement such as mechanical property, elasticity, kinetic energy absorption of high ferro shock-absorption backing plate needs can be met.

Beneficial effects of the present invention:

Compared with prior art, thermoplasticity fretting map vibration-absorptive material of the invention is adjusted using thermoplastic elastomer (TPE) and viscosity Agent composite modified polypropylene, because viscosity modifier makes that thermoplastic elastomer (TPE) and the filler mobility in polypropylene is easy to control, boundary Face is compatible good, reaches while toughness reinforcing, the purpose of enhancing, and the resistance to ag(e)ing and Anti- tarnishing of material are improved by adding antioxidant Property, and add foaming master batch and carry out injection foaming, uniform in foaming, the size of foam bubble and U.S. of product surface can be easily controlled See;

The foaming master batch of the present invention overcomes powdery foaming agent and is easy to fly upward, influences measuring accuracy and working environment is defended simultaneously The defects of raw, suitable size, evengranular master batch is made in foaming agent, have high gas-forming property, good dispersiveness and with tree The good compatibility of fat, the porous, expanded material structure that the closed pore gas-solid of standard is combined is easily formed, adds thermoplastic plastic Melt flows and melt diffusion, improves melt strength, and when being hit, the energy of absorption rises to five times, can make original The crack tip passivation come, so as to improve the toughness of material and fatigue durability.

In addition, preparation method provided by the invention is simple to operate, process conditions are easy to control, good product performance, steady quality.

Embodiment

With reference to specific embodiment, the present invention is further illustrated.GB is used in following examples(National standard)Determine material Properties, unless otherwise instructed, the number of component is parts by weight.In addition, polypropylene is selected from altogether in the following example Poly- polypropylene, its melt index are 1.5~3g/10min.

Embodiment 1

In the present embodiment thermoplasticity fretting map vibration-absorptive material prepare it is as follows:

(1)Prepare foaming master batch:By 18 parts of azodicarbonamide, 50 parts of talcum powder, ethylene-vinyl acetate copolymer 30 Part, after 100 parts of addition homogenizers of low density polyethylene (LDPE) are sufficiently mixed uniformly, are extruded, be granulated using double screw extruder;Squeeze It is 140~145 DEG C to go out temperature, screw speed 40r/min;

(2)Prepare base-material:By 100 parts of polypropylene, thermoplasticity EPDM dynamic vulcanization elastomer(TPV)50 parts, titanium white 15 parts of powder, 1.2 parts of thio-2 acid octadecyl ester, 12 parts of low density polyethylene (LDPE), 1.3 parts of addition mixer high speeds of Tissuemat E are stirred Mixing 5min is mixed, double screw extruder is then added to and is granulated;Rotating speed is 210r/min, and temperature is set as 180~185 DEG C, water cooling bracing pelletizing is into base-material;

(3)Injection foaming:Above-mentioned gained base-material is taken, then adds 15 parts of foaming master batch to be mixed to join injector hopper injection hair Steep to obtain product.

Double screw extruder diameter 76mm described above, draw ratio 40;Injector drying temperature is 80~90 DEG C, injection Pressure is 58MPa, and injection time is 1 second, and barrel zone temperature is 185~190 DEG C, 190~195 DEG C, 175~180 DEG C respectively, nozzle Temperature is 185~190 DEG C, and mold temperature is 20~25 DEG C.The test of its properties sees attached list 1.

Embodiment 2

In the present embodiment thermoplasticity fretting map vibration-absorptive material prepare it is as follows:

(1)Prepare foaming master batch:By 15 parts of azodicarbonamide, 45 parts of talcum powder, ethylene-vinyl acetate copolymer 35 Part, after 100 parts of addition homogenizers of low density polyethylene (LDPE) are sufficiently mixed uniformly, are extruded, be granulated using double screw extruder;Squeeze It is 140~145 DEG C to go out temperature, screw speed 40r/min;

(2)Prepare base-material:By 90 parts of polypropylene, thermoplastic styrene class elastomer(TPS)65 parts, 4 parts of mica and talcum 4 parts of powder, 4,4 '-thio(6- tertiary butyl -3- methylphenols)1.0 parts, 18 parts of ethylene-vinyl acetate copolymer, 0.8 part of stearic acid Add mixer high speed and be stirred 8min, be then added to double screw extruder and be granulated;Rotating speed is 180r/min, temperature Degree is set as 185~190 DEG C, and water cooling bracing pelletizing is into base-material;

(3)Injection foaming:Above-mentioned gained base-material is taken, then adds 10 parts of foaming master batch to be mixed to join injector hopper injection hair Steep to obtain product.

Double screw extruder diameter 76mm described above, draw ratio 40;Injector drying temperature is 80~90 DEG C, injection Pressure is 55MPa, and injection time is 2 seconds, and barrel zone temperature is 185~190 DEG C, 195~200 DEG C, 180~185 DEG C respectively, nozzle Temperature is 190~195 DEG C, and mold temperature is 25~30 DEG C.The test of its properties sees attached list 1.

Embodiment 3

In the present embodiment thermoplasticity fretting map vibration-absorptive material prepare it is as follows:

(1)Prepare foaming master batch:By 20 parts of azodicarbonamide, 60 parts of talcum powder, ethylene-vinyl acetate copolymer 45 Part, after 100 parts of addition homogenizers of low density polyethylene (LDPE) are sufficiently mixed uniformly, are extruded, be granulated using double screw extruder;Squeeze It is 145~150 DEG C to go out temperature, screw speed 40r/min;

(2)Prepare base-material:By 80 parts of polypropylene, thermoplastic polyester elastomer(TPEE)70 parts, 12 parts of titanium dioxide, [β-(3, 5 di-t-butyl 4- hydroxy-phenies)Propionic acid] 1.5 parts of pentaerythritol ester, 20 parts of ethylene-vinyl acetate copolymer, Tissuemat E 1.2 Part addition mixer high speed is stirred 6min, is then added to double screw extruder and is granulated;Rotating speed is 240r/min, Temperature is set as 185~190 DEG C, and water cooling bracing pelletizing is into base-material;

(3)Injection foaming:Above-mentioned gained base-material is taken, then adds 18 parts of foaming master batch to be mixed to join injector hopper injection hair Steep to obtain product.

Double screw extruder diameter 76mm described above, draw ratio 40;Injector drying temperature is 80~90 DEG C, injection Pressure is 65MPa, and injection time is 1 second, and barrel zone temperature is 190~195 DEG C, 190~195 DEG C, 180~185 DEG C respectively, nozzle Temperature is 185~190 DEG C, and mold temperature is 25~30 DEG C.The test of its properties sees attached list 1.

Embodiment 4

In the present embodiment thermoplasticity fretting map vibration-absorptive material prepare it is as follows:

(1)Prepare foaming master batch:By 25 parts of azodicarbonamide, 55 parts of talcum powder, ethylene-vinyl acetate copolymer 40 Part, after 100 parts of addition homogenizers of low density polyethylene (LDPE) are sufficiently mixed uniformly, are extruded, be granulated using double screw extruder;Squeeze It is 145~150 DEG C to go out temperature, screw speed 40r/min;

(2)Prepare base-material:By 90 parts of polypropylene, thermoplastic polyester elastomer(TPEE)80 parts, 0 part of silica 1,4, 4 '-thio(6- tertiary butyl -3- methylphenols)1.2 parts, 25 parts of low density polyethylene (LDPE) is high in 1.5 parts of addition mixers of stearic acid Speed is stirred 8min, is then added to double screw extruder and is granulated;Rotating speed is 210r/min, temperature is set as 180~ 185 DEG C, water cooling bracing pelletizing is into base-material;

(3)Injection foaming:Above-mentioned gained base-material is taken, then adds 15 parts of foaming master batch to be mixed to join injector hopper injection hair Steep to obtain product.

Double screw extruder diameter 76mm described above, draw ratio 40;Injector drying temperature is 80~90 DEG C, injection Pressure is 62MPa, and injection time is 1.5 seconds, and barrel zone temperature is 185~190 DEG C, 190~195 DEG C, 175~180 DEG C respectively, spray Mouth temperature is 185~190 DEG C, and mold temperature is 20~25 DEG C.The test of its properties sees attached list 1.

Comparative example 1

In the present embodiment thermoplasticity fretting map vibration-absorptive material prepare it is as follows(Thermoplastic elastomer (TPE) is not added with, remaining step With embodiment 3):

(1)Prepare foaming master batch:By 20 parts of azodicarbonamide, 60 parts of talcum powder, ethylene-vinyl acetate copolymer 45 Part, after 100 parts of addition homogenizers of low density polyethylene (LDPE) are sufficiently mixed uniformly, are extruded, be granulated using double screw extruder;Squeeze It is 145~150 DEG C to go out temperature, screw speed 40r/min;

(2)Prepare base-material:By 80 parts of polypropylene, 12 parts of titanium dioxide, [β-(3,5 di-t-butyl 4- hydroxy-phenies)Propionic acid] 1.5 parts of pentaerythritol ester, 20 parts of ethylene-vinyl acetate copolymer, 1.2 parts of addition mixer high speeds of Tissuemat E are stirred 6min, it is then added to double screw extruder and is granulated;Rotating speed is 240r/min, and temperature is set as 185~190 DEG C, water cooling Tie rod pelletizing is into base-material;

(3)Injection foaming:Above-mentioned gained base-material is taken, then adds 18 parts of foaming master batch to be mixed to join injector hopper injection hair Steep to obtain product.

Double screw extruder diameter 76mm described above, draw ratio 40;Injector drying temperature is 80~90 DEG C, injection Pressure is 65MPa, and injection time is 1 second, and barrel zone temperature is 190~195 DEG C, 190~195 DEG C, 180~185 DEG C respectively, nozzle Temperature is 185~190 DEG C, and mold temperature is 25~30 DEG C.The test of its properties sees attached list 1.

Comparative example 2

In the present embodiment thermoplasticity fretting map vibration-absorptive material prepare it is as follows(Foaming master batch is not prepared, and remaining step is the same as real Apply example 4):

(1)Prepare base-material:By 90 parts of polypropylene, thermoplastic polyester elastomer(TPEE)80 parts, 0 part of silica 1,4, 4 '-thio(6- tertiary butyl -3- methylphenols)1.2 parts, 25 parts of low density polyethylene (LDPE) is high in 1.5 parts of addition mixers of stearic acid Speed is stirred 8min, is then added to double screw extruder and is granulated;Rotating speed is 210r/min, temperature is set as 180~ 185 DEG C, water cooling bracing pelletizing is into base-material;

(2)Injection foaming:Above-mentioned gained base-material is taken, then adds 15 parts of foaming agent azodicarbonamide to be mixed to join injector Hopper injection foaming obtains product.

Double screw extruder diameter 76mm described above, draw ratio 40;Injector drying temperature is 80~90 DEG C, injection Pressure is 62MPa, and injection time is 1.5 seconds, and barrel zone temperature is 185~190 DEG C, 190~195 DEG C, 175~180 DEG C respectively, spray Mouth temperature is 185~190 DEG C, and mold temperature is 20~25 DEG C.The test of its properties sees attached list 1.

Table 1

It can be seen that by each item data in table 1, the combination property of embodiment 3,4 is preferable, and embodiment 1~4 is with thermoplastic elastomehc The change of property body and viscosity modifier, elongation at break and impact strength etc. significantly increase, compression set and oil resistivity body Product expansion rate diminishes, and tensile strength varies less;By the contrast of comparative example 1 and embodiment 3, thermoplastic elastic is not added in discovery Its impact strength of thermoplasticity fretting map vibration-absorptive material and elongation at break of body decline a lot, and compression set is also deteriorated;It is logical The contrast of comparative example 2 and embodiment 4 is crossed, finds not adding the permanent change of its compression of the thermoplasticity fretting map vibration-absorptive material of foaming master batch Shape and oil resistivity cubical expansivity become big, and impact strength also diminishes, and performance reduces.

The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using this hair It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein General Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to implementation here Example, for those skilled in the art according to the announcement of the present invention, not departing from improvement that scope made and modification all should be Within protection scope of the present invention.

Claims (9)

  1. A kind of 1. thermoplasticity fretting map vibration-absorptive material, it is characterised in that:It is made up of the component of following parts by weight:
    Described polypropylene is selected from COPP, and its melt index is 3g/10min;
    Described thermoplastic elastomer (TPE) is selected from thermoplastic polyester elastomer, thermoplasticity EPDM dynamic vulcanization elastomer or thermoplastic One or more of property styrenic elastomer;Wherein, thermoplastic polyester elastomer by terephthalic acid (TPA), Isosorbide-5-Nitrae butanediol and gathers Butanol copolymerization forms, and thermoplasticity EPDM dynamic vulcanization elastomer is dispersed in polypropylene plastics base by ethylene propylene diene rubber particulate Formed in body, thermoplastic styrene class elastomer is the copolymer of butadiene or isoprene and styrene block type;
    Described viscosity modifier is selected from low density polyethylene (LDPE), acrylonitrile-butadiene-styrene terpolymer or ethene-vinegar One or more of sour ethylene copolymer;
    Described foaming master batch is made up of the component of following parts by weight:
    Described cladding is ethylene-vinyl acetate copolymer;
    The preparation method of described thermoplasticity fretting map vibration-absorptive material comprises the following steps:
    (1) foaming master batch is prepared:15~25 parts of foaming agent, 45~60 parts of nucleator, 30~45 parts of cladding, foaming master batch are carried After 100 parts of addition homogenizers of body resin are sufficiently mixed uniformly, are extruded, be granulated using double screw extruder;Extrusion temperature is 140~150 DEG C, screw speed 40r/min;
    (2) base-material is prepared:By 80~100 parts of polypropylene, 50~80 parts of thermoplastic elastomer (TPE), 8~15 parts of filler, antioxidant 1~2 Part, 12~25 parts of viscosity modifier, 0.8~1.5 part of addition mixer high speed of dispersant is stirred 5~8min, Ran Houjia Enter to double screw extruder and be granulated;Rotating speed is 180~240r/min, and temperature is set as 180~190 DEG C, and water cooling bracing is cut Grain is into base-material;
    (3) injection foaming:The base-material prepared in step (2) is taken, then adds 10~18 parts of foaming master batch to be mixed to join injector material Bucket injection foaming obtains thermoplasticity fretting map vibration-absorptive material;
    The specific process parameter of injection foaming is in described step (3):The drying temperature of injector is 80~90 DEG C, injection Pressure is 55~65MPa, and the time of injection is 1~2 second, the temperature of machine barrel is 185~195 DEG C respectively, 190~200 DEG C, 175 ~185 DEG C, the temperature of nozzle is 185~195 DEG C, and the temperature of mould is 20~30 DEG C.
  2. 2. thermoplasticity fretting map vibration-absorptive material according to claim 1, it is characterised in that:Described filler is selected from titanium white One or more of powder, mica, talcum powder or silica.
  3. 3. thermoplasticity fretting map vibration-absorptive material according to claim 1, it is characterised in that:Described antioxidant is selected from thio In dipropionic acid octadecyl ester, dilauryl thiodipropionate or 4,4 '-thiobis (the 6- tert-butyl group -3- methylphenols) it is a kind of with On.
  4. 4. thermoplasticity fretting map vibration-absorptive material according to claim 1, it is characterised in that:Described dispersant is selected from oil One or more of acid, Tissuemat E or stearic acid.
  5. 5. thermoplasticity fretting map vibration-absorptive material according to claim 1, it is characterised in that:Described foaming agent is azo two Formamide.
  6. 6. thermoplasticity fretting map vibration-absorptive material according to claim 1, it is characterised in that:Described nucleator is talcum Powder.
  7. 7. thermoplasticity fretting map vibration-absorptive material according to claim 1, it is characterised in that:Described foaming master batch carrier tree Fat is low density polyethylene (LDPE).
  8. 8. a kind of preparation method of thermoplasticity fretting map vibration-absorptive material according to claim any one of 1-7, its feature exist In:Comprise the following steps:
    (1) foaming master batch is prepared:15~25 parts of foaming agent, 45~60 parts of nucleator, 30~45 parts of cladding, foaming master batch are carried After 100 parts of addition homogenizers of body resin are sufficiently mixed uniformly, are extruded, be granulated using double screw extruder;Extrusion temperature is 140~150 DEG C, screw speed 40r/min;
    (2) base-material is prepared:By 80~100 parts of polypropylene, 50~80 parts of thermoplastic elastomer (TPE), 8~15 parts of filler, antioxidant 1~2 Part, 12~25 parts of viscosity modifier, 0.8~1.5 part of addition mixer high speed of dispersant is stirred 5~8min, Ran Houjia Enter to double screw extruder and be granulated;Rotating speed is 180~240r/min, and temperature is set as 180~190 DEG C, and water cooling bracing is cut Grain is into base-material;
    (3) injection foaming:The base-material prepared in step (2) is taken, then adds 10~18 parts of foaming master batch to be mixed to join injector material Bucket injection foaming obtains thermoplasticity fretting map vibration-absorptive material;
    The specific process parameter of injection foaming is in described step (3):The drying temperature of injector is 80~90 DEG C, injection Pressure is 55~65MPa, and the time of injection is 1~2 second, the temperature of machine barrel is 185~195 DEG C respectively, 190~200 DEG C, 175 ~185 DEG C, the temperature of nozzle is 185~195 DEG C, and the temperature of mould is 20~30 DEG C.
  9. 9. preparation method according to claim 8, it is characterised in that:Double screw extruder is straight in described step (1) Footpath is 76mm, draw ratio 40:1.
CN201310103357.8A 2013-03-28 2013-03-28 A kind of thermoplasticity fretting map vibration-absorptive material and preparation method thereof CN104072881B (en)

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