CN107474365A - A kind of fireproof wear-resisting environment-friendly materials and preparation method thereof - Google Patents
A kind of fireproof wear-resisting environment-friendly materials and preparation method thereof Download PDFInfo
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- CN107474365A CN107474365A CN201710780569.8A CN201710780569A CN107474365A CN 107474365 A CN107474365 A CN 107474365A CN 201710780569 A CN201710780569 A CN 201710780569A CN 107474365 A CN107474365 A CN 107474365A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
Abstract
The present invention relates to a kind of environment-friendly materials, more particularly to a kind of fireproof wear-resisting environment-friendly materials and preparation method thereof, belong to Material Field.The present invention discloses a kind of fireproof wear-resisting environment-friendly materials, includes according to weight/mass percentage composition meter：50 60% quartz sands, 20 30% thermoplastics, 5 15% calcium carbonate, 1 5% compatilizer, 1 5% lubricant, 1 5% stabilizer；The compatilizer is cyclic acid anhydride (MAH) class compound；The lubricant is selected from zinc stearate, fitter acids and its ester class, the one or more of fatty acid acyl amine；The stabilizer is calcium zinc stabilizer.The present invention environment-friendly materials can improve 60% fire resistance and 50% wearability, have the advantages that production stability height, color can be adjusted arbitrarily, the considerable row of product is strong, pollution-free, environmental protection and energy saving, resource reutilization.
Description
Technical field
The present invention relates to a kind of environment-friendly materials, more particularly to a kind of fireproof wear-resisting environment-friendly materials and preparation method thereof.
Background technology
Wood plastic composite or other Wood-plastic foam class products absorb water in moist and more water environments at present make moist after easily
Rot, dilatancy the problem of become increasingly conspicuous；But high temperature, drying environment in poor flame retardant properties be even more great hidden danger.
Requirement of the larger public place of flow of the people to anti-wear performance is high, and novel composite environment-friendly material of the present invention effectively solves anti-
The generation of the problems such as fiery, wear-resisting.That is the either composite material of wood moulding or other materials, as long as with for example poly- second of thermoplastic resin
Alkene (PE) or the product that polypropylene (PP) is main raw material(s), fire protecting performance and wearability are always insurmountable problem.
Therefore, in view of the above-mentioned problems, the present invention is provided with a kind of new fireproof wear-resisting environment-friendly materials and preparation method thereof.
The content of the invention
It is an object of the invention to provide a kind of fireproof wear-resisting environment-friendly materials and preparation method thereof, the fireproof wear-resisting environment-friendly materials
To solve the problems, such as anti-flammability in the prior art and anti-wear performance difference.
The purpose of the present invention is achieved through the following technical solutions：A kind of fireproof wear-resisting environment-friendly materials, according to quality hundred
Content meter is divided to include：
Further, the compatilizer is cyclic acid anhydride (MAH) class compound；
The lubricant is selected from zinc stearate, fitter acids and its ester class, the one or more of fatty acid acyl amine；
The stabilizer is calcium zinc stabilizer.
Further, the fireproof wear-resisting environment-friendly materials include according to weight/mass percentage composition meter：
Further, the fireproof wear-resisting environment-friendly materials include according to weight/mass percentage composition meter：
Further, the one kind of the quartz sand in magmatic rock, sedimentary rock or metamorphic rock；The quartz sand surface
Water adsorption rate is less than 3%, and the granularity of the quartz sand is more than 40 mesh.
Further, the thermoplastic is polypropylene (PP) or polyethylene (PE).
Invention additionally discloses the preparation method of the fireproof wear-resisting environment-friendly materials, including step：Quartz sand, thermoplasticity are moulded
Material, calcium carbonate, compatilizer, lubricant are mixed with stabilizer, and after heating stirring, compound is cooled down.
Further, the preparation method of the fireproof wear-resisting environment-friendly materials also includes step：Will using plasticizing prilling
The compound of cooling carries out plasticizing granulation, and the granulation of plasticizing is cut into particle using cutting technique, by the extruded work of particle
Skill is extruded, and is cooled and shaped.The purpose that temperature setting reduces successively be in order that brilliant moulding material progressively harden, beneficial to sizing, into
Type.
Further, the speed of mixing is that 600-800 turns/min.
Further, the diameter for cutting into particle is 1-10mm.
The present invention has the following advantages that compared with prior art：
The fire resistance of environment-friendly materials of the present invention can improve 60%, and wearability improves 50%, have production stability height, face
Color can be adjusted arbitrarily, the considerable row of product is strong, pollution-free, environmental protection and energy saving, resource reutilization the advantages that；
The method of the present invention can effectively improve the mechanical stability of environment-friendly materials, dimensional accuracy and process velocity.
Brief description of the drawings
, below will be to specific implementation in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in mode or description of the prior art, it should be apparent that, drawings in the following description
It is some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of the preparation method of the fireproof wear-resisting environment-friendly materials of the present invention.
Embodiment
Technical scheme is clearly and completely described below in conjunction with embodiment, it is clear that described reality
It is part of the embodiment of the present invention to apply example, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
The present invention uses quartz sand, waste or used plastics, calcium carbonate, compatilizer, lubricant and stabilizer to pass through for primary raw material
Batch mixing, granulation, extrusion and a kind of Novel fireproof high-abrasive material formed, it possesses the two-fold advantage of marble and plastics.Once
Shaping, it is easy to process.Environment-friendly materials mainly have that waterproof, fire prevention, anti-corrosion, Anti-moth-eating, wearability are strong, no timber knot, without corner
Material, color can be allocated arbitrarily, high-environmental, pollution-free, nuisanceless, recyclable the advantages that recycling.This product is applied to gardens
Landscape, decoration of exterior wall, wooden footway, guardrail, home bathroom, balcony etc..The product is free of benzene material, content of formaldehyde zero.It can
The advantages of recycling greatlys save timber usage amount.
A kind of fireproof wear-resisting environment-friendly materials, include according to weight/mass percentage composition meter：50-60% quartz sands, 20-30% thermoplastics
Property plastics, 5-15% calcium carbonate, 1-5% compatilizers, 1-5% lubricants, 1-5% stabilizers；Preferably, contain according to quality percentage
Gauge includes：52-58% quartz sands, 22-28% thermoplastics, 6-12% calcium carbonate, 1.5-4% compatilizers, 1.5-4% profits
Lubrication prescription, 1.5-4% stabilizers；It is highly preferred that include according to weight/mass percentage composition meter：55% quartz sand, 28% thermoplastic,
10% calcium carbonate, 3% compatilizer, 2% lubricant, 2% stabilizer；The compatilizer is cyclic acid anhydride (MAH) class compound；
The lubricant is selected from zinc stearate, fitter acids and its ester class, the one or more of fatty acid acyl amine；The stabilizer is calcium
Zinc stabilizer.
The following detailed description of the mechanism of action and their synergy of various components used in the present invention once.
Compatilizer promotes incompatible two kinds of polymer to be incorporated in one, and then obtain by means of intermolecular bonding force
The auxiliary agent of stable blend.Cyclic acid anhydride type (MAH) is one of compatilizer.Wherein, it is grafted to maleic anhydride on polyolefin
Maleic anhydride compatilizer based on, its grafting rate is generally 0.8%-1.0%, is mainly used in the modification of polyolefin plastics.With
Other compatilizers are compared, and maleic anhydride monomer Polarity comparision is strong, and com-patibilising effect is relatively good.
Maleic anhydride is grafted compatilizer by introducing highly polar reactive group, material is had high polarity and reaction
Property, it is a kind of macromolecule interfacial coupling agent, compatilizer, dispersion enhancing agents.It is mainly used in halogen-free flameproof, filling, fiberglass reinforced, increasing
It is tough, metal is cohesive, alloy is compatible etc., the compatibility of composite and the dispersiveness of filler can be greatly improved, it is compound so as to improve
Mechanical strength.Maleic anhydride grafting compatilizer can improve inorganic filler and organic resin compatibility, improve product stretching,
Impact strength, high filling is realized, reduces resin demand, improves rheological performance, improves surface smoothness.The compatilizer of the present invention
Function is by means of intermolecular bonding force, promotes plastics and flyash two kinds of polymer to be incorporated in and be integrally formed stable knot
Structure, make dispersed phase and continuous phase uniform.
Stabilizer selects calcium zinc stabilizer, and calcium zinc stabilizer is key component by calcium salt, zinc salt, lubricant, antioxidant etc.
Synthesized using special combination process.It can not only substitute the poisonous stabilizer such as lead cadmium salt class and organic tin, and have
Fairly good heat endurance, photostability and the transparency and tinting strength, tinting power.It was verified that in resin, processing characteristics is good, heat
Stabilization is a kind of good non-toxic stabilizer equivalent to lead salt stabilizer.Its function is to increase the stability of mixture,
Reaction can be slowed down, keep chemical balance, reduce surface tension, prevent light, thermal decomposition or oxidation Decomposition etc. from acting on, to reach production
The purpose of product stay in grade.The calcium zinc stabilizer of the present invention is solid-like.
The lubricant is selected from zinc stearate, fitter acids and its ester class, the one or more of fatty acid acyl amine；Wherein
Aliphatic acid is the one or more in stearic acid, palmitic acid, oleic acid or linoleic acid；Fatty acid acyl amine is palmitamide, tristearin
One or more in acid amides, oleamide, linoleamide or erucyl amide.
Zinc stearate is white lightweight fine-powder, molecular formula ZN (C17H35COO) 2, molecular structure RCOOZnOOCR (R
For the mixed alkyl in industrial stearic acid), flammable, proportion 1.095,900 DEG C of self-ignition point, density 1.095,130 DEG C of fusing point, there is cunning
Soapy feeling；Not soluble in water, ethanol, ether, dissolve in the organic solvents such as hot ethanol, turpentine oil, benzene and acid.Zinc stearate is organic molten
Turn into jelly after being dissolved by heating in agent to the cold, meet strong acid and be decomposed into stearic acid and corresponding zinc salt.Zinc stearate has lubricity,
Have hygroscopicity, it is nontoxic, it is micro- tool excitant, it is pollution-free, without hazard property.Zinc stearate does not dissolve in polar solvent；They are main
Application field is plastics and rubber industry, due to being used as releasing agent and lubricant with good compatibility.
Organic matter aliphatic acid is the aliphatic hydrocarbon chain for the length that a carboxyl is contained in one end, the formula of linear saturated fatty acids
It is C (n) H (2n+1) COOH, rudimentary aliphatic acid is colourless liquid, and irritant smell, advanced aliphatic acid is waxy solid,
The smell that can not substantially smell.Aliphatic acid is a kind of simplest fat, and it is the constituent of many more complicated fat.Aliphatic acid
It is oxidable to be decomposed into CO2 and H2O in the case where there is sufficient oxygen supply, big energy is discharged, therefore aliphatic acid is that body is main
One of energy source.The emulsifying agent and other surfactants, lubricant, gloss that aliphatic acid can be used in butadiene-styrene rubber production
Agent.Aliphatic acid is used as lubricant in the present invention.
Palmitic acid, molecular formula：C16H32O2, structural formula：CH3(CH2)14COOH.The scale of pearly-lustre is carried for white,
Exist in many oil ＆ fats in the form of glyceride.It is not soluble in water, cold alcohol and petroleum ether are slightly soluble in, is dissolved in hot ethanol, ether
With chloroform etc..For producing candle, soap, lubricant, synthetic detergent, softening agent etc..It can be made by Hydrolysis of Palm Oil.
Linoleic acid is yellow or fallow clear oil liquid；There is the micro- smelly of vegetable oil, acrid flavour is peppery.
Palmitamide palm oil (mainly containing palmitic acid (C16) and oleic acid (C18)) obtains after saponification
Fatty acid mixed and ammonia react obtained acid amides.Belong to mixing acid amides, main is exactly the side chain acid amides of 16 and 18 carbon.Generally make
For a species ceramide type NMF, moisture-keeping function is mainly played.
Oleamide, molecular formula:C18H35NO, molecular weight:281.4766.It is mainly used in lubricant and anti-adhesion agent.
Important derivatives of the erucyl amide as erucic acid, it is a kind of excellent fine chemical product having wide range of applications.By
In it there is higher fusing point and good heat endurance (at 273 DEG C stable), thus be mainly used as various plastics, resin
Antiplastering aid and slipping agent, the excellent lubricant and antistatic additive of cast film.
The function of lubricant reduces polymer molecule in process of production, the mobility and stability of lubricant are higher
Between frictional force, moreover it is possible to form molecular layer between material and facility, reduce the friction of material and facility metal interface.
The present invention is illustrated below by specific embodiment, it will be apparent to a skilled person that this should not be by
It is interpreted as the limitation to scope of the invention as claimed.
The raw material that embodiments of the invention use is as follows：
Embodiment 1
It is 55% quartz sand, 28% thermoplasticity waste or used plastics, 10% calcium carbonate, 3% maleic anhydride by weight/mass percentage composition
Compatilizer, 2% palmitamide and 2% calcium zinc stabilizer are added in the mixer that rotating speed is 600 turns/min, are mixed, treat temperature
Compound is released when degree reaches 120 DEG C and is cooled to room temperature；
Compound after cooling is added in comminutor, the temperature of equipment successively by 200 DEG C, 195 DEG C, 190 DEG C, 185 DEG C,
180 DEG C of settings, are plastified, it is 4mm particles to cut into diameter through granulating head by comminutor.
Particle is added into extruder, the temperature of the extruder presses 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, 160 DEG C successively
Reduce, by secondary plasticizing, by variously-shaped mould, through being cooled and shaped, cut by certain length.
Embodiment 2
It is 50% quartz sand, 30% thermoplasticity waste or used plastics, 5% calcium carbonate, 5% maleic anhydride phase by weight/mass percentage composition
Hold agent, 5% oleamide and 5% calcium zinc stabilizer to add in the mixer that rotating speed is 630 turns/min, mixed, treat temperature
Compound is released when reaching 120 DEG C and is cooled to room temperature；
Compound after cooling is added in comminutor, the temperature of equipment successively by 200 DEG C, 195 DEG C, 190 DEG C, 185 DEG C,
180 DEG C of settings, are plastified, it is 5mm particles to cut into diameter through granulating head by comminutor.
Particle is added into extruder, the temperature of the extruder presses 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, 160 DEG C successively
Reduce, by secondary plasticizing, by variously-shaped mould, through being cooled and shaped, cut by certain length.
Embodiment 3
It is 60% quartz sand, 20% thermoplasticity waste or used plastics, 15% calcium carbonate, 1% maleic anhydride by weight/mass percentage composition
Compatilizer, 3% palmitic acid and 1% calcium zinc stabilizer are added in the mixer that rotating speed is 650 turns/min, are mixed, treat temperature
Compound is released when reaching 120 DEG C and is cooled to room temperature；
Compound after cooling is added in comminutor, the temperature of equipment successively by 200 DEG C, 195 DEG C, 190 DEG C, 185
DEG C, 180 DEG C setting, plastified by comminutor, it is 5mm particles to cut into diameter through granulating head.
Particle is added into extruder, the temperature of the extruder presses 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, 160 DEG C successively
Reduce, by secondary plasticizing, by variously-shaped mould, through being cooled and shaped, cut by certain length.
Embodiment 4
It is 52% quartz sand, 28% thermoplasticity waste or used plastics, 8% calcium carbonate, 4% maleic anhydride phase by weight/mass percentage composition
Hold agent, 4% oleic acid and 4% calcium zinc stabilizer to add in the mixer that rotating speed is 700 turns/min, mixed, treat that temperature reaches
Compound is released at 120 DEG C and is cooled to room temperature；
Compound after cooling is added in comminutor, the temperature of equipment successively by 200 DEG C, 195 DEG C, 190 DEG C, 185 DEG C,
180 DEG C of settings, are plastified, it is 6mm particles to cut into diameter through granulating head by comminutor.
Particle is added into extruder, the temperature of the extruder presses 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, 160 DEG C successively
Reduce, by secondary plasticizing, by variously-shaped mould, through being cooled and shaped, cut by certain length.
Embodiment 5
It is 58% quartz sand, 25.5% thermoplasticity waste or used plastics, 12% calcium carbonate, 1.5% Malaysia by weight/mass percentage composition
Acid anhydrides compatilizer, 1.5% linoleic acid and 1.5% calcium zinc stabilizer are added in the mixer that rotating speed is 650 turns/min, are mixed
Close, compound is released when temperature reaches 120 DEG C and is cooled to room temperature；
Compound after cooling is added in comminutor, the temperature of equipment successively by 200 DEG C, 195 DEG C, 190 DEG C, 185 DEG C,
180 DEG C of settings, are plastified, it is 9mm particles to cut into diameter through granulating head by comminutor.
Particle is added into extruder, the temperature of the extruder presses 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, 160 DEG C successively
Reduce, by secondary plasticizing, by variously-shaped mould, through being cooled and shaped, cut by certain length.
Testing result：
Following detection project is carried out according to state's calibration method；
Material fire resistance is calculated with time (min), from on-test, until Three Standards (stability, integrality,
Thermal insulation) one of failure untill.As do not failed, then experiment terminates after 3h.
Material wear ability is tested, and after the polishing experiment of 12000 revolutions, does not observe appreciable wear trace according to regulation method
Mark.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of fireproof wear-resisting environment-friendly materials, include according to weight/mass percentage composition meter：
2. fireproof wear-resisting environment-friendly materials according to claim 1, it is characterised in that
The compatilizer is cyclic acid anhydride (MAH) class compound；
The lubricant is selected from zinc stearate, fitter acids and its ester class, the one or more of fatty acid acyl amine；
The stabilizer is calcium zinc stabilizer.
3. fireproof wear-resisting environment-friendly materials according to claim 2, it is characterised in that include according to weight/mass percentage composition meter：
4. fireproof wear-resisting environment-friendly materials according to claim 3, it is characterised in that include according to weight/mass percentage composition meter：
5. the fireproof wear-resisting environment-friendly materials according to any one of claim 1-4, it is characterised in that the quartz sand is selected from
One kind in magmatic rock, sedimentary rock or metamorphic rock；The water adsorption rate of the quartz sand surface is less than 3%, the quartz sand
Granularity is more than 40 mesh.
6. the fireproof wear-resisting environment-friendly materials according to any one of claim 1-4, it is characterised in that the thermoplastic
For polypropylene (PP) or polyethylene (PE).
7. a kind of preparation method of the fireproof wear-resisting environment-friendly materials according to any one of claim 1-6, including step：
Quartz sand, thermoplastic, calcium carbonate, compatilizer, lubricant are mixed with stabilizer, after heating stirring, by compound
Cooling.
8. the preparation method of a kind of fireproof wear-resisting environment-friendly materials according to claim 7, it is characterised in that also include step
Suddenly：
The compound of cooling is carried out by plasticizing granulation using plasticizing prilling, and cut the granulation of plasticizing using cutting technique
Into particle, the extruded technique of particle is extruded, is cooled and shaped.
A kind of 9. preparation method of fireproof wear-resisting environment-friendly materials according to claim 7, it is characterised in that the speed of mixing
Turn/min for 600-800.
A kind of 10. preparation method of fireproof wear-resisting environment-friendly materials according to claim 8, it is characterised in that cutting granulating
The diameter of son is 1-10mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108976598A (en) * | 2018-07-17 | 2018-12-11 | 徐州益康环保科技有限公司 | A kind of fireproof wear-resisting environment-friendly materials and preparation method thereof |
| CN109734998A (en) * | 2018-12-25 | 2019-05-10 | 天长市富信电子有限公司 | A kind of signal transmssion line thermoplastic elastic material and preparation method thereof |
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| WO1995018276A1 (en) * | 1993-12-30 | 1995-07-06 | Krems Chemie Aktiengesellschaft | Bitumen-free binder, building material mixture and aqueous emulsion binder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108976598A (en) * | 2018-07-17 | 2018-12-11 | 徐州益康环保科技有限公司 | A kind of fireproof wear-resisting environment-friendly materials and preparation method thereof |
| CN109734998A (en) * | 2018-12-25 | 2019-05-10 | 天长市富信电子有限公司 | A kind of signal transmssion line thermoplastic elastic material and preparation method thereof |
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