CN104292624A - Bumper and preparation method thereof - Google Patents
Bumper and preparation method thereof Download PDFInfo
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- CN104292624A CN104292624A CN201410501127.1A CN201410501127A CN104292624A CN 104292624 A CN104292624 A CN 104292624A CN 201410501127 A CN201410501127 A CN 201410501127A CN 104292624 A CN104292624 A CN 104292624A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- 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
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a bumper and a preparation method thereof. The preparation method comprises the following steps: weighing PP (polypropylene), glass fiber, CPP (chlorinated polypropylene), mica powder, POE (polyolefin elastomer), maleic anhydride, antioxidant, EPDM (ethylene-propylene-diene monomer), magnesium salt crystal whisker, HDPE (high-density polyethylene), coupling agent, calcium carbonate, calcium stearate GF and PA6 (polyamide 6) according to parts by weight, uniformly mixing, extruding, granulating, carrying out injection molding, and cooling to obtain the bumper. The tensile strength of the product is 35-40 MPa, and the bending strength is 45-55 MPa. The impact strength at room temperature is 700-720 J/m, and the impact strength at -30 DEG C is 80-100 J/m. The percentage of elongation is 500-700%, and the heat-deformation temperature is 110-130 DEG C. The relative density is 0.88-0.98, and the shrinkage is 1.4-1.6%.
Description
Technical field
The application belongs to bumper preparation technology field, particularly relates to the bumper and preparation method thereof of a kind of high strength, high tenacity.
Background technology
Bumper is the security device absorbing and slow down foreign impacts power, protection vehicle body front and rear part.Automobile front/rear collision bumper becomes channel-section steel with steel plate punched before many years, rivets or weld together with longitudinal beam, has one section of larger gap, look very unsightly with vehicle body.Along with the development of automotive industry and engineering plastics are in the extensive application of automotive industry, bumper has also moved towards as a kind of important security device the road reformed.The car front/rear collision bumper of today, except keeping original defencive function, also will be pursued and the harmony of car body moulding and unification, the lightweight of pursuit itself.The front/rear collision bumper of car is all that plastics are made, and people are called plastic bumper.The plastic bumper of general automobile by outside plate, cushioning material and crossbeam three part form.Wherein outside plate and cushioning material made of plastic, crossbeam cold rolled sheet is stamped to form U-lag; Outside plate and cushioning material are attached to crossbeam.Plastic bumper is made up of three parts such as outside plate, cushioning material and crossbeams.Wherein outside plate and cushioning material made of plastic, crossbeam thickness is that the cold rolled sheet of 1.5 millimeter is stamped to form U-type groove; Outside plate and cushioning material are attached on crossbeam, and crossbeam and longitudinal beam screw joints, can disassemble at any time.The plastics that this plastic bumper uses, use polyester system and polypropylene-based bi-material substantially, adopt injection moulding to make.Bumper absorbs to relax foreign impacts power, the security device of protection vehicle body front and rear part.Before Two decades years, car front/rear collision bumper is based on metallic substance, is pressed into U-type groove steel with the steel plate stamping that thickness is more than 3 millimeters, surface treatment chromium plating, rivet with longitudinal beam or weld together, having one section of larger gap with vehicle body, seems the parts added up.Along with the development of automotive industry, bumper has also moved towards on the road of innovation as a kind of important security device.The car front/rear collision bumper of today, except keeping original defencive function, also will be pursued harmonious and unified with car body moulding, the lightweight of pursuit itself.In order to reach this object, the front/rear collision bumper of car is emerging has used plastics, and people are called plastic bumper.Plastic bumper is made up of three parts such as outside plate, cushioning material and crossbeams.Wherein outside plate and cushioning material made of plastic, crossbeam thickness is that the cold rolled sheet of 1.5 millimeter is stamped to form U-type groove; Outside plate and cushioning material are attached on crossbeam, and crossbeam and longitudinal beam screw joints, can disassemble at any time.The plastics that this plastic bumper uses, use polyester system and polypropylene-based bi-material substantially, adopt injection moulding to make.External also have a kind of plastics being called poly-carbon ester system, infilters alloying constituent, adopts the method that alloy injection is shaping, the collision bumper processed not only has the rigidity of high strength, also have the advantage that can weld, and coating performance is good, the consumption on car gets more and more.Plastic bumper has intensity, rigidity and ornamental; from safety; shock absorption can be played when automobile crashes; car body before and after protection; from the appearance, very naturally one piece can be combined in car body, completely integral; have well ornamental, become the vitals of decoration car external form.
On June 26th, 2013, national Automobile Products confederation of trade unions, body accessories point Technical Committee of national Automotive Standardization Technical Committee and Guangdong Dong Jian group issue China's " bumper for automobile " industry standard jointly.This standard is drafted by Guangdong Dong Jian group is leading.It is reported that the formal announcement of China's " bumper for automobile " industry standard indicates that bumper for automobile industry standard realizes the breakthrough of " zero ", filled up domestic standard blank.This standard formally will be implemented on September 1st, 2013 in the whole nation, and initiation industry production producer and retailer greatly pay close attention to.Plastic bumper has intensity, rigidity and ornamental, from safety, can play shock absorption when automobile crashes, car body before and after protection; From the appearance, very naturally one piece can be combined in car body, completely integral, have well ornamental, become the vitals decorating car external form.Bumper; be positioned at most of region at vehicle front and rear; be designed on the surface and avoid outside vehicle to damage the impact caused Vehicle security system, they have the ability reducing driver and crew's injury when high-speed impact, are more and more designed to pedestrian protecting now.PP plastic material, chemical name: polypropylene, feature: density is little, intensity and toughness, hardness thermotolerance is all better than low pressure polyethylene, can about 100 degree uses.There is good electrical property and high-frequency insulation not by humidity effect, but become fragile during low temperature, not wear-resisting, easily aging.Be suitable for making common mechanical part, corrosion-resistant part and insulating part.If the chaotic both sides being arranged in molecular backbone chain of acrylic resin methyl claim Atactic Polypropelene, the both sides being arranged alternately in molecular backbone chain when methyl claim syndiotactic polypropylene.In the acrylic resin that general industry is produced, isotactic structural content is about 95%, and all the other are random or syndiotactic polypropylene.Industrial products with isotactic thing for main component.Polypropylene also comprises the multipolymer of propylene and a small amount of ethene.Be generally translucent colorless solid, odorless is nontoxic.The highly crystallized due to compound with regular structure, therefore fusing point can up to 167 DEG C.Heat-resisting, corrosion-resistant, the sterilization of goods used vapour is its outstanding advantages.Density is little, is the lightest general-purpose plastics.Shortcoming is that low-temperature impact resistance is poor, more aging, but can be overcome respectively by modification.
PP is a kind of semi-crystalline material.It is harder and have higher fusing point than PE.Because the PP temperature of homopolymer type is highly brittle lower than when less than 0 DEG C, therefore the PP material of much business adds the Random copolymer RCP of 1 ~ 4% ethene or the pincers segmentation multipolymer of more height ratio ethylene content.The PP material of copolymer type has lower hot torsion temperature (100 DEG C), low transparency, low-luster, low rigidity, but has stronger resistance to impact shock.The intensity of PP increases along with the increase of ethylene content.The vicat softening temperature of PP is 150 DEG C.Because degree of crystallinity is higher, surface rigidity and the anti-scratch characteristic of this material are fine.There is not environmental stress cracking problem in PP.Usually, adopt add glass fibre, the method for metal additive or thermoplastic rubber carries out modification to PP.The turnover rate MFR scope of PP is 1 ~ 40.The PP material impact property of low MFR is better but ductility/strength is lower.For the material of identical MFR, wanting of the strength ratio homopolymer type of copolymer type is high.Due to crystallization, the shrinking percentage of PP is quite high, is generally 1.8 ~ 2.5%.And the direction homogeneity of shrinking percentage is more far better than materials such as PE-HD.The glass additive adding 30% can make shrinking percentage drop to 0.7%.The PP material of homopolymer type and copolymer type all has excellent resistance to water soak, antiacid caustic corrosion, resist dissolution.But it does not have resistibility to aromatic hydrocarbon solvent, chlorinated hydrocarbon solvent etc.PP does not resemble PE yet at high temperature still has oxidation-resistance.About the PP resin ratio be used in injection-molded item can account for half, wherein daily necessities with common PP for raw material, auto parts machinery with strengthen or Toughened PP for raw material, other purposes is then based on the Co-polypropylene PPC raw material of high impact and low embrittlement temperature.PP more and more becomes the leading material of auto parts machinery, becomes first automotive plastic kind.Toughened PP is used for collision bumper and hubcap etc., strengthens PP then for panel board, bearing circle, handle, container, battery jar etc.Polypropylene is the polymkeric substance of nontoxic, odorless, tasteless oyster white height crystallization, and it is stable especially to water, and the water-intake rate in water is only 0. O1%, good moldability, and product surface good luster is easy to painted.Polyacrylic degree of crystallinity is high, compound with regular structure, thus has excellent mechanical property.The absolute value of Mechanical Properties of PP higher than polyethylene, but still belongs to kind on the low side in a plastic material, and its tensile strength only can reach 30 MPa or slightly high level.The polypropylene that isotactic index is larger has higher tensile strength, but with the raising of isotactic index, the shock strength of material declines to some extent, but no longer changes after dropping to a certain numerical value.Temperature and loading rate very large to polyacrylic Toughness.When temperature is higher than second-order transition temperature, impact fracture is ductile rupture, be brittle rupture, and impact value significantly declines lower than second-order transition temperature.Improve loading rate, the temperature that ductile rupture can be made to change to brittle rupture rises.Polypropylene has excellent flexural fatigue resistance, its goods bent 106 times and do not damage at normal temperatures.Polypropylene has good thermotolerance, and goods temperature to carry out disinfection sterilizing more than 100 DEG C, and not by under the condition of external force, 150 DEG C also indeformable.Embrittlement temperature is-35 DEG C, embrittlement can occur lower than-35 DEG C, and polyacrylic chemical stability is fine, outside decapacitation is corroded by the vitriol oil, concentrated nitric acid, all more stable to other various chemical reagent; But low-molecular-weight aliphatic hydrocarbon, aromatic hydrocarbon and chlorinated hydrocarbon etc. can make polypropylene softening and swelling, its chemical stability also increases with the increase of degree of crystallinity simultaneously, so polypropylene is applicable to making various chemical pipeline and accessory, anticorrosion ability is good.Polypropylene is very sensitive to ultraviolet, adds zinc oxide, Tyox B, carbon black or similar milky white filler etc. and can improve its ageing-resistant performance.
Chinese patent CN102585362A discloses a kind of material prescription of automobile plastic bumper, by polypropylene 1215C, polypropylene HC9012M, 1250 object talcum powder, 4000 object talcum powder, polyolefin elastomer, antioxidant 1010, irgasfos 168, calcium stearate, coupling agent, glycidyl methacrylate graft polypropylene.The present invention can improve system shock strength, reduces product molding shrinking percentage; Significantly improve the strength of materials and toughness, excellent product performance, but tensile strength is low and bending poor; Chinese patent CN102276917A discloses a kind of resin special for automobile bumper, adopts acrylic resin, polyolefin elastomer, grafted maleic anhydride, carbon fiber, superfine talcum powder, oxidation inhibitor, UV absorption agent and toner to form.Above-mentioned material joins in high-speed mixer with interpolation order by a certain percentage, twin screw extruder is sent into mix 10 ~ 30min in high-speed mixer after, after twin screw extruder is extruded, then through water-cooled, pelletizing, sieve, be resin special for automobile bumper after dry, packaging.Resin special for automobile bumper has impact resistance, corrosion-resistant, ageing-resistant function, the collision bumper that this production of resins goes out is lightweight, shock strength is high, weather resistance is good, and automobile generation slight impact collision bumper also there will not be fracture phenomena, but shock strength and elongation low.And universal along with humanity concept, and the formation of novel harmonious society, designs the high and bumper that heat-drawn wire is high and preparation method thereof of a kind of high strength, high tenacity, elongation at break and is very important.
Summary of the invention
the technical problem solved:
The application, for above-mentioned technical problem, provides a kind of bumper and preparation method thereof, solves that existing automobile insurance intensity is low, poor toughness, elongation at break are little and the technical problem such as heat-drawn wire is low.
technical scheme:
A kind of bumper, the raw materials by weight portion proportioning of described bumper is as follows: PP100 part; Glass fibre 10-30 part; CPP50-60 part; Mica powder 5-25 part; POE20-40 part; MALEIC ANHYDRIDE 5-15 part; Oxidation inhibitor 0.5-2.5 part; EPDM15-35 part; Magnesium salt whisker 10-20 part; HDPE is 15-25 part; Coupling agent 0.3-0.7 part; Calcium carbonate is 30-50 part; Calcium stearate 0.5-1.5 part; GF35-55 part; PA6 is 15-25 part.
As a preferred technical solution of the present invention: the raw materials by weight portion proportioning of described bumper is as follows: PP100 part; Glass fibre 15-25 part; CPP52-58 part; Mica powder 10-20 part; POE25-35 part; MALEIC ANHYDRIDE 8-12 part; Oxidation inhibitor 1-2 part; EPDM20-30 part; Magnesium salt whisker 13-27 part; HDPE is 16-24 part; Coupling agent 0.4-0.6 part; Calcium carbonate is 35-45 part; Calcium stearate 0.8-1.2 part; GF40-50 part; PA6 is 16-24 part.
As a preferred technical solution of the present invention: the raw materials by weight portion proportioning of described bumper is as follows: PP100 part; 20 parts, glass fibre; CPP55 part; Mica powder 15 parts; POE30 part; MALEIC ANHYDRIDE 10 parts; 1.5 parts, oxidation inhibitor; EPDM25 part; Magnesium salt whisker 15 parts; HDPE is 20 parts; Coupling agent 0.5 part; Calcium carbonate is 40 parts; Calcium stearate 1 part; GF45 part; PA6 is 20 parts.
As a preferred technical solution of the present invention: described oxidation inhibitor adopts antioxidant 1010 or irgasfos 168.
As a preferred technical solution of the present invention: described coupling agent adopts silane coupling agent or titanate coupling agent.
As a preferred technical solution of the present invention: the preparation method of described bumper, comprises the steps:
The first step: take PP, glass fibre, CPP, mica powder, POE, MALEIC ANHYDRIDE, oxidation inhibitor, EPDM, magnesium salt whisker, HDPE, coupling agent, calcium carbonate, calcium stearate, GF and PA6 according to parts by weight proportioning;
Second step: PP, glass fibre, CPP, mica powder and POE are dropped in reactor and is heated to 60-80 DEG C, stir 5-10min, then add surplus stock, be warming up to 80-100 DEG C, stir 20-40min, be cooled to 30-50 DEG C;
3rd step: mixed material is dropped in twin screw extruder and extrudes, barrel temperature 230 DEG C, 235 DEG C, 240 DEG C, 245 DEG C, 250 DEG C, 255 DEG C and 260 DEG C;
4th step: injection temperature is 190-210 DEG C, nozzle temperature 180-200 DEG C, injection pressure 7-11MPa, inject time 6-10s, dwell time 6-14s, cooling 40-60s after.
As a preferred technical solution of the present invention: in described second step, stirring velocity is 200-400 rev/min.
As a preferred technical solution of the present invention: in described 4th step, cooling time is 40-60s.
beneficial effect:
A kind of bumper of the present invention and preparation method thereof adopts above technical scheme compared with prior art, has following technique effect: 1, product tensile strength 35-40MPa, flexural strength 45-55MPa; 2, shock strength 700-720J/m under room temperature ,-30 DEG C of shock strength 80-100 J/m; 3, elongation 500-700%, heat-drawn wire 110-130 DEG C; 4, relative density 0.88-0.98, shrinking percentage 1.4-1.6%, the widespread production not division of history into periods can replace current material.
Embodiment
embodiment 1:
PP100 part is taken according to parts by weight proportioning; 10 parts, glass fibre; CPP50 part; Mica powder 5 parts; POE20 part; MALEIC ANHYDRIDE 5 parts; Irgasfos 168 is 0.5 part; EPDM15 part; Magnesium salt whisker 10 parts; HDPE is 15 parts; Titanate coupling agent 0.3 part; Calcium carbonate is 30 parts; Calcium stearate 0.5 part; GF35 part; PA6 is 15 parts.
PP, glass fibre, CPP, mica powder and POE are dropped in reactor and be heated to 60 DEG C, stir 5min, then add surplus stock, be warming up to 80 DEG C, stir 20min, stirring velocity is 280 revs/min, is cooled to 30 DEG C.
Dropped in twin screw extruder mixed material and extrude, barrel temperature 230 DEG C, 235 DEG C, 240 DEG C, 245 DEG C, 250 DEG C, 255 DEG C and 260 DEG C, injection temperature is 190 DEG C, nozzle temperature 180 DEG C, injection pressure 7MPa, inject time 6s, dwell time 6s, after cooling 40s.
Product tensile strength 35MPa, flexural strength 45MPa; Shock strength 700J/m under room temperature ,-30 DEG C of shock strength 80J/m; Elongation 500%, heat-drawn wire 110 DEG C; Relative density 0.88, shrinking percentage 1.4%.
embodiment 2:
PP100 part is taken according to parts by weight proportioning; 30 parts, glass fibre; CPP60 part; Mica powder 25 parts; POE40 part; MALEIC ANHYDRIDE 15 parts; Irgasfos 168 is 2.5 parts; EPDM35 part; Magnesium salt whisker 20 parts; HDPE is 25 parts; Silane coupling agent 0.7 part; Calcium carbonate is 50 parts; Calcium stearate 1.5 parts; GF55 part; PA6 is 25 parts.
PP, glass fibre, CPP, mica powder and POE are dropped in reactor and be heated to 80 DEG C, stir 10min, then add surplus stock, be warming up to 100 DEG C, stir 40min, stirring velocity is 200 revs/min, is cooled to 50 DEG C.
Dropped in twin screw extruder mixed material and extrude, barrel temperature 230 DEG C, 235 DEG C, 240 DEG C, 245 DEG C, 250 DEG C, 255 DEG C and 260 DEG C, injection temperature is 210 DEG C, nozzle temperature 200 DEG C, injection pressure 11MPa, inject time 10s, dwell time 14s, after cooling 60s.
Product tensile strength 36MPa, flexural strength 48MPa; Shock strength 705J/m under room temperature ,-30 DEG C of shock strength 85 J/m; Elongation 550%, heat-drawn wire 115 DEG C; Relative density 0.9, shrinking percentage 1.45%.
embodiment 3:
PP100 part is taken according to parts by weight proportioning; 15 parts, glass fibre; CPP52 part; Mica powder 10 parts; POE25 part; MALEIC ANHYDRIDE 8 parts; Antioxidant 1010 is 1 part; EPDM20 part; Magnesium salt whisker 13 parts; HDPE is 16 parts; Silane coupling agent 0.4 part; Calcium carbonate is 35 parts; Calcium stearate 0.8 part; GF40 part; PA6 is 16 parts.
PP, glass fibre, CPP, mica powder and POE are dropped in reactor and be heated to 65 DEG C, stir 6min, then add surplus stock, be warming up to 85 DEG C, stir 25min, stirring velocity is 400 revs/min, is cooled to 35 DEG C.
Dropped in twin screw extruder mixed material and extrude, barrel temperature 230 DEG C, 235 DEG C, 240 DEG C, 245 DEG C, 250 DEG C, 255 DEG C and 260 DEG C, injection temperature is 195 DEG C, nozzle temperature 185 DEG C, injection pressure 8MPa, inject time 7s, dwell time 8s, after cooling 45s.
Product tensile strength 38MPa, flexural strength 50MPa; Shock strength 710J/m under room temperature ,-30 DEG C of shock strength 90 J/m; Elongation 600%, heat-drawn wire 120 DEG C; Relative density 0.83, shrinking percentage 1.5%.
embodiment 4:
PP100 part is taken according to parts by weight proportioning; 25 parts, glass fibre; CPP58 part; Mica powder 20 parts; POE35 part; MALEIC ANHYDRIDE 12 parts; Antioxidant 1010 is 2 parts; EPDM30 part; Magnesium salt whisker 27 parts; HDPE is 24 parts; Silane coupling agent 0.6 part; Calcium carbonate is 45 parts; Calcium stearate 1.2 parts; GF50 part; PA6 is 24 parts.
PP, glass fibre, CPP, mica powder and POE are dropped in reactor and be heated to 75 DEG C, stir 8min, then add surplus stock, be warming up to 95 DEG C, stir 35min, stirring velocity is 380 revs/min, is cooled to 45 DEG C.
Dropped in twin screw extruder mixed material and extrude, barrel temperature 230 DEG C, 235 DEG C, 240 DEG C, 245 DEG C, 250 DEG C, 255 DEG C and 260 DEG C, injection temperature is 205 DEG C, nozzle temperature 195 DEG C, injection pressure 10MPa, inject time 9s, dwell time 12s, after cooling 55s.
Product tensile strength 39MPa, flexural strength 54MPa; Shock strength 715J/m under room temperature ,-30 DEG C of shock strength 95 J/m; Elongation 650%, heat-drawn wire 125 DEG C; Relative density 0.95, shrinking percentage 1.55%.
embodiment 5:
PP100 part is taken according to parts by weight proportioning; 20 parts, glass fibre; CPP55 part; Mica powder 15 parts; POE30 part; MALEIC ANHYDRIDE 10 parts; Antioxidant 1010 is 1.5 parts; EPDM25 part; Magnesium salt whisker 15 parts; HDPE is 20 parts; Silane coupling agent 0.5 part; Calcium carbonate is 40 parts; Calcium stearate 1 part; GF45 part; PA6 is 20 parts.
PP, glass fibre, CPP, mica powder and POE are dropped in reactor and be heated to 60-80 DEG C, stir 5-10min, then add surplus stock, be warming up to 80-100 DEG C, stir 20-40min, stirring velocity is 300 revs/min, is cooled to 30-50 DEG C.
Mixed material is dropped in twin screw extruder and extrudes, barrel temperature 230 DEG C, 235 DEG C, 240 DEG C, 245 DEG C, 250 DEG C, 255 DEG C and 260 DEG C, injection temperature is 190-210 DEG C, nozzle temperature 180-200 DEG C, injection pressure 7-11MPa, inject time 6-10s, dwell time 6-14s, cooling 40-60s after.
Product tensile strength 40MPa, flexural strength 55MPa; Shock strength 720J/m under room temperature ,-30 DEG C of shock strength 100 J/m; Elongation 700%, heat-drawn wire 130 DEG C; Relative density 0.98, shrinking percentage 1.6%.
Composition all components in above embodiment all can business be bought.
Above-described embodiment is just for setting forth content of the present invention, instead of restriction, and any change therefore in the implication suitable with claims of the present invention and scope, all should think to be included in the scope of claims.
Claims (8)
1. a bumper, is characterized in that the raw materials by weight portion proportioning of described bumper is as follows: PP100 part; Glass fibre 10-30 part; CPP50-60 part; Mica powder 5-25 part; POE20-40 part; MALEIC ANHYDRIDE 5-15 part; Oxidation inhibitor 0.5-2.5 part; EPDM15-35 part; Magnesium salt whisker 10-20 part; HDPE is 15-25 part; Coupling agent 0.3-0.7 part; Calcium carbonate is 30-50 part; Calcium stearate 0.5-1.5 part; GF35-55 part; PA6 is 15-25 part.
2. a kind of bumper according to claim 1, is characterized in that described bumper raw materials by weight portion proportioning is as follows: PP100 part; Glass fibre 15-25 part; CPP52-58 part; Mica powder 10-20 part; POE25-35 part; MALEIC ANHYDRIDE 8-12 part; Oxidation inhibitor 1-2 part; EPDM20-30 part; Magnesium salt whisker 13-27 part; HDPE is 16-24 part; Coupling agent 0.4-0.6 part; Calcium carbonate is 35-45 part; Calcium stearate 0.8-1.2 part; GF40-50 part; PA6 is 16-24 part.
3. a kind of bumper according to claim 1, is characterized in that the raw materials by weight portion proportioning of described bumper is as follows: PP100 part; 20 parts, glass fibre; CPP55 part; Mica powder 15 parts; POE30 part; MALEIC ANHYDRIDE 10 parts; 1.5 parts, oxidation inhibitor; EPDM25 part; Magnesium salt whisker 15 parts; HDPE is 20 parts; Coupling agent 0.5 part; Calcium carbonate is 40 parts; Calcium stearate 1 part; GF45 part; PA6 is 20 parts.
4. a kind of bumper according to claim 1, is characterized in that: described oxidation inhibitor adopts antioxidant 1010 or irgasfos 168.
5. a kind of bumper according to claim 1, is characterized in that: described coupling agent adopts silane coupling agent or titanate coupling agent.
6. a preparation method for bumper described in claim 1, is characterized in that, comprises the steps:
The first step: take PP, glass fibre, CPP, mica powder, POE, MALEIC ANHYDRIDE, oxidation inhibitor, EPDM, magnesium salt whisker, HDPE, coupling agent, calcium carbonate, calcium stearate, GF and PA6 according to parts by weight proportioning;
Second step: PP, glass fibre, CPP, mica powder and POE are dropped in reactor and is heated to 60-80 DEG C, stir 5-10min, then add surplus stock, be warming up to 80-100 DEG C, stir 20-40min, be cooled to 30-50 DEG C;
3rd step: mixed material is dropped in twin screw extruder and extrudes, barrel temperature 230 DEG C, 235 DEG C, 240 DEG C, 245 DEG C, 250 DEG C, 255 DEG C and 260 DEG C;
4th step: injection temperature is 190-210 DEG C, nozzle temperature 180-200 DEG C, injection pressure 7-11MPa, inject time 6-10s, dwell time 6-14s, cooling 40-60s after.
7. the preparation method of bumper according to claim 6, is characterized in that: in described second step, stirring velocity is 200-400 rev/min.
8. the preparation method of bumper according to claim 6, is characterized in that: in described 4th step, cooling time is 40-60s.
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| CN107513210A (en) * | 2016-06-18 | 2017-12-26 | 合肥杰事杰新材料股份有限公司 | A kind of low smell electrodepositable polypropylene material and preparation method thereof |
| EP3315550A1 (en) * | 2016-11-01 | 2018-05-02 | Chen, Chin-Fu | Environment-friendly material and window covering slat made of the same |
| CN109486002A (en) * | 2018-10-31 | 2019-03-19 | 重庆工商大学 | A kind of PP composite material and preparation method thereof |
| CN112778648A (en) * | 2021-01-28 | 2021-05-11 | 武汉瑞琪尔泰科技有限公司 | Low-shrinkage lightweight modified PP composite material and preparation method and application thereof |
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