CN108641195A - One kind being used for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material and preparation method of rail traffic - Google Patents
One kind being used for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material and preparation method of rail traffic Download PDFInfo
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- CN108641195A CN108641195A CN201810396832.8A CN201810396832A CN108641195A CN 108641195 A CN108641195 A CN 108641195A CN 201810396832 A CN201810396832 A CN 201810396832A CN 108641195 A CN108641195 A CN 108641195A
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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
- C08L23/14—Copolymers of propene
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The present invention relates to one kind being used for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material of rail traffic, and preparing raw material includes by mass percentage：It is copolymerized PP60%~70%, organic phosphorus-nitrogen containing flame retardant 18%, PTFE 0.2%, hollow glass microballoon 8%~10%, coupling agent 1%, antioxidant 0.1%, UV stabilizer 0.1%, calcium stearate 0.1%；Prepared composite board has good flame retardant property and processing performance, can prepare the product with Modeling of Complex Surface using molding or plastic uptake technique according to product demand.And the features such as finally assigning fire block articles, lightweight, anti-impact, high-modulus, complex geometric shapes.To be with a wide range of applications in fields such as rail traffic, automobile interiors.
Description
Technical field
The present invention relates to technical field of polymer materials, more particularly to one kind are poly- with fire-retardant anti-impact lightweight for rail traffic
Propylene-based thermoplastic's composite material and preparation method.
Background technology
With the development of the technologies such as high-speed railway, light rail, tramcar and magnetic suspension, rail vehicle transportation tool is to light
The requirement of quantization is growing day by day.Dosage and application site of the composite material on these means of transports have become measurement, and it is designed
Advanced one of important indicator.Thermosetting resin base fiber reinforced composite material is widely used that in current track traffic,
Its common process is fiber reinforced thermosetting resin prepreg to be sent into autoclave heating extrusion forming, or use special
Mold heats fiber reinforced thermosetting resin prepreg and pressurizes, and makes its cavity shape curing molding according to mold（Such as
SMC）.Thermosetting resin can only primary heating molding, be cured in process, formation does not fuse undissolved cross-linked network
Type high-molecular compound, the manufacture and preservation of material and equipment cost are very high, and thermosetting resin based composites have in addition
The shortcomings of low production efficiency, waste material are difficult to recycle, these problems all restrict thermosetting resin base fiber reinforced composite material and exist
Application development in rail traffic.
Corresponding, thermoplastic resin has obtained quick development in the application of field of track traffic in recent years.These
Thermoplastic resin material includes polypropylene, nylon, polycarbonate, ABS, polyetherimide（PEI）And its mixture system, it can
To exist in a variety of forms, such as short fiber reinforced resin particle, prepreg, extruding preformed board.Under thermoplastic resin room temperature
It is polymer linear or with a small amount of branch for solid, intermolecular no crosslinking, in molding process, resin is pressurized heated
Soften and flow, does not chemically react, can shape through cooling, during heat-shaping repeatedly, thermoplastic molecule knot
Structure does not change substantially, is had the following advantages with the comparison of thermosetting resin based composites：
1）The fracture toughness and elongation at break of thermoplastic resin linear molecule chain are much larger than thermosetting resin build reticular structure,
With higher toughness, shock resistance and good resistance to crack extension ability；
2）Short molding cycle, production efficiency is high, and heating only occurs in heating process and becomes the physical change that soft cooling is hardened, at
Type period general Minute, can effectively reduce manufacturing cost and use cost；Thermoplastic material processing performance is good simultaneously, can be made into multiple
Miscellaneous shape is suitable for automated production and other thermoplastic process processes；
3）Structural weight reduction can be achieved, between thermoplastic resin based composite material structural member can direct fusion weld, to save
Same with thermosetting compound material uses the weight and cost of metal fastenings, also ensures the degree of flushing of body structure surface；
4）With remoldability, the repeatable processing of product；
5）Storage cost is low, it is not necessary to which low-temp storage can store for a long time.
Exactly because thermoplastic resin based composite material in the advantage of the various aspects such as cost of labor, production efficiency, loss of weight,
Thermoplastic resin based composite material is by its distinctive advantage substituted metal and other conventional thermosetting polymer matrix composites
Chance is increasing.
However, rail vehicle transportation tool overriding concern be material security performance, especially flame retardant property, material must
Fire prevention under different application occasion as defined in country variant, low smoke density, low smoke toxicity must be met and low-heat burst size etc. of burning
It is required that.Although simultaneously rail vehicle transportation tool to it is light-weighted require it is growing day by day, to the mechanical property of end article, especially
It is that there is no any reductions for tensile property, erosion-resisting characteristics and non-deformability.These technical indicators are to thermoplastic composite
Exploitation and application bring comparable challenge.
In view of the above problems, therefore, it is necessary to it makes improvements.
Invention content
The present invention is provided a kind of light with fire-retardant anti-impact for rail traffic to overcome above-mentioned defect in the prior art
Matter polypropylene-based thermoplastic composite material and preparation method.
In order to reach object above, the technical solution adopted in the present invention is：One kind being used for the fire-retardant anti-impact of rail traffic
Lightweight polypropylene-based thermoplastic composite material, the high-modulus high-impact lightweight polypropylene material are filled for a kind of hollow glass micropearl
The base material of thermoplastic composite, composite material is the thermoplastic polypropylene base material system with high flame resistance, not on year-on-year basis
The cenosphere of example, which is filled, assigns the lower unit proportion of the composite material, glass carbon fiber in cenosphere itself or base material
And the addition of other inorganic fillers, improve the bending modulus and bending strength of composite material.
One kind being used for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material of rail traffic, prepares raw material by quality
Percentages include：Copolymerization PP60%~70%, organic phosphorus-nitrogen containing flame retardant 18%, PTFE 0.2%, hollow glass microballoon 8%~
10%, coupling agent 1%, antioxidant 0.1%, UV stabilizer 0.1%, calcium stearate 0.1%.
One kind being used for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material of rail traffic, prepares raw material by quality
Percentages further include：Inorganic Fillers Filled agent 12%.
One kind being used for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material of rail traffic, prepares raw material by quality
Percentages further include：Reinforcing fiber 12%.
Contain poly- third in a kind of system for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material of rail traffic
Olefine resin base material, fire retardant, anti-molten drop agent, Hinered phenols antioxidant, stabilizer, releasing agent etc., can also be in thermoplastic resin
Suitable glass fibre or carbon fiber are added in base material, come property such as the tensile strength and the bending moduluses that improve thermoplastic resin material
Energy.Fiber ratio shared in thermoplastic polypropylene based composites is 10~50%, thermoplastic polypropylene resin accounts for 50~
90%；It is different according to reinforcing fiber and the collocation of thermoplastic resin system, coupling agent appropriate can be selected（Silanes, epoxies
Deng）To increase the compatibility and bond strength of fiber and thermoplastic resin.Coupling agent and above-mentioned auxiliary agent（Such as fire retardant, anti-molten drop
Agent, antioxidant, stabilizer and releasing agent etc.）Conjunction accounts for 1~30%.
Reinforcing fiber can be glass fibre, carbon fiber, basalt fibre etc., and fiber is in enhancing thermoplastic composite
There are length in 0.2mm or more.Thermoplastic polypropylene base resin can be homopolypropylene resin (PP-H), block (resistance to punching
Hit) mixture of one or more of copolymer polypropylene (PP-B) and random (random) copolymer polypropylene (PP-R) resin, or
It is above-mentioned resin and other thermoplastic polyesters, polyamide-based resin, makrolon, other resins for universal use or high performance engineering plastics
Ratio blend alloy.Fire retardant can be the reaction-type flame-retarding of one or more of additive flame retardants or chemical bonding
Agent.Typical fire retardant includes alkyl acid phosphate esters, aryl phosphate esters, dicyclopentadiene class, aliphatic halogenated hydrocarbon class, organic
Silicon-based flame retardant etc.；It can also be inorganic combustion inhibitor such as tellurium compound, hydroxy Al, magnesium hydroxide, borate etc.；It is either organic
The compound collaboration formula of nitrogenated flame retardant and phosphorus flame retardant, if melamine and condensed phosphate mix the fire retardant formed,
Or melamine salt, the cyclophosphamide polymer etc. of pentaerythritol phosphate.Anti- molten drop agent is mainly polytetrafluoroethylene (PTFE)
(PTFE), emulsion-type, pure powder type or cladded type powder can be selected according to thermoplastic material system difference.
In addition to enhancing thermoplastic polypropylene base resin system with glass, carbon fiber, basalt fibre etc., it can also use and add
Add the mode of inorganic filler to increase the multinomial mechanical property and thermodynamic property of material, including rigidity, creep resistance, thermal deformation
Temperature, shrinking percentage etc..Common filler includes calcium carbonate, talcum powder, montmorillonite, wollastonite, titanium dioxide etc.；It inorganic is filled out to any
Material, grain size and particle diameter distribution are important technical indicator.Usual grain size is smaller, distribution is narrower, and filling effect is better.In thermoplasticity
The mass content of inorganic filler accounts for about 0~20% in resin system.
The main component of hollow glass micropearl is borosilicate, be a kind of granularity be 10-250 microns, wall thickness is 1-2 microns
Hollow ball.The product has many advantages, such as the high and good chemical stability of light, low heat conduction, intensity, by specially treated,
With oleophylic, hydrophobicity performance, it is very easy to be scattered in the organic materials such as resin.Hollow glass micropearl is used for thermoplastic resin material
The filling of material not only acts as the kollag for improving processing fluidity, but also can be modified to the comprehensive mechanical property of material,
To improve its compression strength and composite bending modulus, hardness, wearability, dimensional stability, rigidity and heat resisting temperature etc. are improved.Hollow glass
The surface of glass microballon can be modified by infiltrating compatilizer and silicone coupling agents appropriate, to raising and resin base material
Binding ability.The mass content of hollow glass micropearl accounts for about 0~20% in thermoplastic polypropylene base resin system.
The auxiliary agent kind being often used in thermoplastic polypropylene based composites system is mainly dispersant and surface conditioning agent.
The effect of dispersant is to improve material processing fluidity, is conducive to glass fibre, inorganic filler, hollow glass micro-ball etc. in matrix
It is spreaded more evenly across in resin.Common dispersant has：White oil（Atoleine）, paraffin, dioctyl phthalate（BOP）、
Low molecule weight polyethylene（Polyethylene wax）And stearic acid etc..The main performance of common dispersants, can be according to filler and carrier
The performance characteristic selection of resin uses；Surface conditioning agent can change glass, carbon fiber, inorganic filler and hollow glass micro-ball etc.
Surface-active is allowed to mainly have coupling agent and stearic acid two for lipophile in favor of being mixed with vector resin by hydrophilic conversion
Class, it is brighter to add flow ability modifying agent etc. in order to which product dispersibility is more preferable.
It is a kind of to be used for the rail traffic preparation method of fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material, feature
It is, includes the following steps：
Step 1: weighing dry Inorganic Fillers Filled agent and coupling agent by weight ratio, it is added in high-speed mixer, in rotating speed
3000~6000 revs/min of stirrings 10~after sixty minutes, it is for use to be cooled to less than 40 DEG C dischargings；
Step 2: weighing dry thermoplastic polypropylene base resin particle and hollow glass microballoon by weight ratio, high speed is added
It is stirred 3~5 minutes in mixing machine, the product for weighing step 1 by weight ratio is then added, and be added and claim by weight ratio
Compatilizer, fire retardant, light stabilizer, antioxidant, the lubricant taken, another stirring reach after mixing, go out for 5~20 minutes
Material；
Step 3: the material of step 2 is added twin-screw extrude, squeezed out after abundant melting blending at high temperature, cooling is made
Grain；Also reinforcing fiber can be weighed according to weight proportion, by the reinforcing fiber being chopped and thermoplastic polypropylene base resin in double spiral shells
Blending extrusion, cooling granulation in bar extruder；
Step 4: the plastic pellet prepared by step 3 is carried out fusion plastification by single screw extrusion machine again, subsequently enter flat
Shape head so that material is uniformly distributed along head width direction, then through mouth mold extrusion board, through roller under draft gear traction
Thick, cooling is determined in the press polish of cylinder group, then through trimming device shaping, the plate product being finally cut into the desired length by cutter device；
Step 5: behavior of polypropylene composites plank prepared in step 4, so can also using it as middle layer, with
Superficial layer with higher erosion-resisting characteristics or tensile property constitutes multi-layer thermoplastic composite board knot by being laminated compound method
Structure；It is compound by being laminated with other superficial layers with specific function or as middle layer, prepare with high chemical resistance,
The composite board of the properties such as weatherability, wearability.
The beneficial effects of the invention are as follows：
Fire-retardant anti-impact lightweight thermoplastic polypropylene based composites described in the invention, are having both fire-retardant thermoplastic resin system
While excellent flame and physical property, using hollow glass microballoon, the specific density of thermoplastic composite is further reduced,
And by the addition of inorganic filler or glass etc., significantly improve intensity, rigidity and thermal stability etc..Prepared composite material
Plank has good flame retardant property and processing performance, can prepare band using molding or plastic uptake technique according to product demand
There is the product of Modeling of Complex Surface.And the features such as finally assigning fire block articles, lightweight, anti-impact, high-modulus, complex geometric shapes.
To be with a wide range of applications in fields such as rail traffic, automobile interiors.
Specific implementation mode
It elaborates below to the embodiment of the present invention.
Embodiment 1：
One kind being used for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material of rail traffic, and component is matched by weight percent
Than for：It is copolymerized PP 70%, organic phosphorus-nitrogen containing flame retardant 18%, PTFE 0.2%, hollow glass microballoon 10%, silane coupling agent 1%, resists
Oxygen agent 0.1%, UV stabilizer 0.1%, calcium stearate 0.1%.Wherein, the copolymerization PP melt index (MI)s MFR is 8；
Organic phosphorus-nitrogen containing flame retardant is white powder, and phosphorus nitrogen element content is 20% or so；The hollow glass is micro-
Ball is plastic extrusion grade, 30 microns of average-size, specific density 0.60；The PTFE is powdered pure powder type；The antioxygen
Agent is Hinered phenols antioxidant AO-60 and phosphite ester kind antioxidant 168 in mass ratio 1：1 compound.
Preparation method：（1）It is micro- that dry PP, organic phosphorus-nitrogen containing flame retardant, PTFE, hollow glass are weighed by weight ratio
Ball, silane coupling agent, antioxidant, UV stabilizer and calcium stearate are added stirring stirring in high-speed mixer and reach for 5~20 minutes
To after mixing, discharge；（2）, by step（1）Material add twin-screw extrude, at 210 DEG C~230 DEG C fully
It is squeezed out after melting blending, cooling granulation is to get a kind of fire-retardant anti-impact lightweight PP composite material of the invention.（3）By step
（2）Prepared plastic pellet carries out fusion plastification by single screw extrusion machine again and is led in draft gear through mouth mold extrusion board
Draw lower through the press polish of roller group, fixed thickness, cooling, then a kind of cleaved fire-retardant anti-impact lightweight PP composite material up to the present invention
Plate product.
Embodiment 2：
One kind being used for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material of rail traffic, and component is matched by weight percent
Than for：It is copolymerized PP about 60%, organic phosphorus-nitrogen containing flame retardant 18%, PTFE 0.2%, hollow glass microballoon 8%, talcum powder 12%, silane
Coupling agent 1%, antioxidant 0.1%, UV stabilizer 0.1%, calcium stearate 0.1%.Wherein, the copolymerization PP melt index (MI)s MFR
It is 8.Organic phosphorus-nitrogen containing flame retardant is white powder, and phosphorus nitrogen element content is 20% or so；The hollow glass is micro-
Ball is plastic extrusion grade, 30 microns of average-size, specific density 0.60；The talcum powder is superfine talcum powder, average grain diameter 1.2
Micron；The PTFE is powdered pure powder type；The antioxidant is Hinered phenols antioxidant AO-60 and phosphorous acid esters are anti-
Oxygen agent 168 in mass ratio 1：1 compound.
Preparation method：（1）, weigh dry superfine talcum powder and silane coupling agent by weight ratio, cylinder material temperature degree is added
In 80 DEG C~100 DEG C of high-speed mixer, in 3000~6000 revs/min of rotating speed stirring 10~after sixty minutes, it is cooled to low
It is for use in 40 DEG C of dischargings；（2）, by weight ratio weigh dry PP, organic phosphorus-nitrogen containing flame retardant, PTFE, hollow glass microballoon,
Stirring stirring 3 ~ 5 minutes in high-speed mixer are added, then in silane coupling agent, antioxidant, UV stabilizer and calcium stearate
Addition weighs step by weight ratio（1）Product, make to stir together reach within 5~20 minutes after mixing, discharging；（3）、
By step（2）Material add twin-screw extrude, at 210 DEG C~230 DEG C after abundant melting blending squeeze out, cooling make
Grain is to get a kind of fire-retardant anti-impact lightweight PP composite material of the invention.（4）By step（3）Prepared plastic pellet is again
Fusion plastification is carried out by single screw extrusion machine, through mouth mold extrusion board, through roller group press polish, fixed under draft gear traction
It is thick, cooling, then after cutting up to a kind of fire-retardant anti-impact lightweight PP composite material plate product of the present invention.
Embodiment 3：
One kind being used for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material of rail traffic, and component is matched by weight percent
Than for：It is copolymerized PP about 60%, organic phosphorus-nitrogen containing flame retardant 18%, PTFE 0.2%, hollow glass microballoon 8%, short glass fiber
12%, silane coupling agent 1%, antioxidant 0.1%, UV stabilizer 0.1%, calcium stearate 0.1%.Wherein, the copolymerization PP melts
Index M FR is 30.Organic phosphorus-nitrogen containing flame retardant is white powder, and phosphorus nitrogen element content is 20% or so；In described
Empty glass microsphere is plastic extrusion grade, 30 microns of average-size, specific density 0.60；9~13 μ of short glass fiber diameter
M, chopped length 3mm, moisture content≤0.1%；The PTFE is powdered pure powder type；The antioxidant is anti-for Hinered phenols
Oxygen agent AO-60 and phosphite ester kind antioxidant 168 in mass ratio 1：1 compound.
Preparation method：（1）, weigh dry short glass fiber and silane coupling agent by weight ratio, cylinder material temperature is added
Degree, in 3000~6000 revs/min of rotating speed stirring 10~after sixty minutes, is cooled in 80 DEG C~100 DEG C of high-speed mixer
Less than 40 DEG C dischargings are for use；（2）, to weigh dry PP, organic phosphorus-nitrogen containing flame retardant, PTFE, hollow glass micro- by weight ratio
Stirring stirring 3~5 minutes in high-speed mixer are added in ball, silane coupling agent, antioxidant, UV stabilizer and calcium stearate,
Then it is added and weighs step by weight ratio（1）Product, make to stir together reach within 5~20 minutes after mixing, discharging；
（3）, by step（2）Material add twin-screw extrude, squeezed out after abundant melting blending at 210 DEG C~230 DEG C, be cooling
It is granulated to get a kind of fire-retardant anti-impact lightweight PP composite material of the present invention.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention；Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (6)
1. one kind being used for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material of rail traffic, it is characterised in that：It is prepared
Raw material includes by mass percentage：It is copolymerized PP60%~70%, organic phosphorus-nitrogen containing flame retardant 18%, PTFE 0.2%, hollow glass
Microballoon 8%~10%, coupling agent 1%, antioxidant 0.1%, UV stabilizer 0.1%, calcium stearate 0.1%.
2. according to claim 1 a kind of for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite wood of rail traffic
Material, it is characterised in that：It prepares raw material：Inorganic Fillers Filled agent 12%.
3. according to claim 1 or 2 a kind of compound with fire-retardant anti-impact lightweight polypropylene-based thermoplastic for rail traffic
Material, it is characterised in that：It prepares raw material：Reinforcing fiber 12%.
4. according to claim 3 a kind of for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material of rail traffic
Preparation method, which is characterized in that include the following steps：
Step 1: weighing dry Inorganic Fillers Filled agent and coupling agent by weight ratio, it is added in high-speed mixer, in rotating speed
3000~6000 revs/min of stirrings 10~after sixty minutes, it is for use to be cooled to less than 40 DEG C dischargings；
Step 2: weighing dry thermoplastic polypropylene base resin particle and hollow glass microballoon by weight ratio, high speed is added
It is stirred 3~5 minutes in mixing machine, the product for weighing step 1 by weight ratio is then added, and be added and claim by weight ratio
Compatilizer, fire retardant, light stabilizer, antioxidant, the lubricant taken, another stirring reach after mixing, go out for 5~20 minutes
Material；
Step 3: the material of step 2 is added twin-screw extrude, squeezed out after abundant melting blending at high temperature, cooling is made
Grain；Also reinforcing fiber can be weighed according to weight proportion, by the reinforcing fiber being chopped and thermoplastic polypropylene base resin in double spiral shells
Blending extrusion, cooling granulation in bar extruder；
Step 4: the plastic pellet prepared by step 3 is carried out fusion plastification by single screw extrusion machine again, subsequently enter flat
Shape head so that material is uniformly distributed along head width direction, then through mouth mold extrusion board, through roller under draft gear traction
Thick, cooling is determined in the press polish of cylinder group, then through trimming device shaping, the plate product being finally cut into the desired length by cutter device；
Step 5: behavior of polypropylene composites plank prepared in step 4, so can also using it as middle layer, with
Superficial layer with higher erosion-resisting characteristics or tensile property constitutes multi-layer thermoplastic composite board knot by being laminated compound method
Structure；It is compound by being laminated with other superficial layers with specific function or as middle layer, prepare with high chemical resistance,
The composite board of the properties such as weatherability, wearability.
5. according to claim 4 a kind of for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material of rail traffic
Preparation method, it is characterised in that：The Inorganic Fillers Filled agent is calcium carbonate, talcum powder, montmorillonite, wollastonite or titanium white
Powder.
6. according to claim 4 a kind of for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material of rail traffic
Preparation method, it is characterised in that：The reinforcing fiber is glass fibre, carbon fiber and basalt fibre.
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| CN201810396832.8A CN108641195A (en) | 2018-04-28 | 2018-04-28 | One kind being used for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material and preparation method of rail traffic |
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| CN201810396832.8A CN108641195A (en) | 2018-04-28 | 2018-04-28 | One kind being used for the fire-retardant anti-impact lightweight polypropylene-based thermoplastic composite material and preparation method of rail traffic |
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Cited By (1)
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| CN112048918A (en) * | 2020-09-12 | 2020-12-08 | 浙江省天台天峰滤料有限公司 | Special heat-insulating cover cloth for durable electrolytic cell and preparation method |
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