CN109593267A - A kind of handle of automobile roof and preparation method thereof - Google Patents
A kind of handle of automobile roof and preparation method thereof Download PDFInfo
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- CN109593267A CN109593267A CN201811221695.0A CN201811221695A CN109593267A CN 109593267 A CN109593267 A CN 109593267A CN 201811221695 A CN201811221695 A CN 201811221695A CN 109593267 A CN109593267 A CN 109593267A
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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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- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2255—Oxides; Hydroxides of metals of molybdenum
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- 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
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer 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
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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
Abstract
The invention belongs to technical field of automobile parts, and in particular to a kind of handle of automobile roof and preparation method thereof.The ceiling handle is made by comprising the following components in parts by weight: acrylic resin containing antimony: 60-80 parts；Polyurethane: 10-30 parts；Filler: 5-10 parts；Fire retardant: 2-8 parts；Antioxidant: 0.1-2 parts of processing aids: 0.5-5 parts.
Description
Technical field
The invention belongs to technical field of automobile parts, and in particular to a kind of handle of automobile roof and preparation method thereof.
Background technique
Air-auxiliary injection forming (hereinafter referred to as " gas assisted molding " or Polymer Processing GAIM) relatively new as one kind
Technology just obtains extensive industrial applications until last century Mo.Compared with regular injection forms (CIM), gas assisted molding has
It saves material, shortens molding cycle, reduces the advantages that clamp force and product good stability of the dimension.Usually in gas assisted molding mistake
Cheng Zhong needs to use high-pressure inert gas as gas is penetrated, pushes simultaneously comperession polymer melt, until melt is full of entire mould
Tool type chamber, melt gradually cools and solidifies under the pressure maintaining effect of gas later, after product temperature is down to calcining temperature, Ji Kekai
Mould takes out product.Gas assisted molding technical requirements are substantially more more complicated than traditional injection moulding forming technique, on the one hand, from device parameter
Speech, gas assisted molding technology needs install gas injection equipment additional on traditional injection forming mold, and die cost increases, and is setting
It needs to consider that gas spout is sized and located to when counting mold, and needs to consider more procedure parameters in gas assisted molding:
Such as gas delay time, gas injection pressure and gas injection time；On the other hand, in Gas-assisted Injection Molding, for material
Material performance requirement is significantly larger than the plastics of traditional injection moulding process: gas assisted molding late stage relies on gas transport pressure, will melt
Drive material is to form hollow state, if the melt flow rate (MFR) (MFR) of melted material is too small, melt viscosity is excessive, gas
Pressure be difficult push melt flows, even if melt flows can be pushed, also because push resistance it is too big, gas easily propagate through air flue into
Enter thin-wall regions, forms " gas refers to " branch；But if melt flow rate (MFR) is too big, material shows lesser melt strength,
Gas becomes smaller across the resistance that air flue enters thin-wall regions, is more easier to form " gas refers to " branch；" gas in Gas-assisted Injection Molding
The formation of finger ", can reduce the intensity of product, cause the failure of gas assisted molding technology, or cannot play gas assisted molding technology
Advantage；Therefore, gas assisted molding puts forward higher requirements the performance of moulding material.
Polypropylene production cost is low, and density is small, and comprehensive mechanical property is good, easy processing, and heat distortion temperature is high, and has good
Good chemical stability and electrical insulating property, thus be widely applied in fields such as automobile, household electrical appliances, furniture, chemical industry, packagings.
Application of the polypropylene in terms of automobile is very extensive, such as: bumper, automobile door plate, tool box, automotive seat, vapour
Vehicle knob etc..Gas assisted molding is as described above, more demanding to moulding material, it is desirable that material melt strength with higher has simultaneously
There is preferable mobility, the modified polypropylene of general inorganic mineral is since melt strength is inadequate or poor fluidity, injection molding system
There are apparent weld mark and current mark in product surface, has seriously affected the appearance of its product, and " gas is easy to produce inside injection-molded item
Refer to ", the mechanical property of product is influenced, thus be not suitable for gas-assisted injection molding.It is mutual in the performance of plastic applications, various polymer
It restrains, the raising of a performance indicator is often possible to will lead to the decline of another performance indicator, such as polyacrylic melt strength
Increase, frequently can lead to polyacrylic melt flow rate (MFR) reduces, and therefore, to obtain poly- the third of melt strength height and good fluidity
Alkene composite material is not so simple.
Summary of the invention
The present invention existing handle of automobile roof gas assisted molding material there are aiming at the problem that, a kind of new polypropylene is provided
Composite material, by accessing antimony element in polypropylene molecular chain, and composite polyurethane improves the mobility of material with filler
And melt strength effectively improves gas assisted molding to obtain while have the polypropylene material of high fondant-strength and high fluidity
Quality of item.
In order to reach above-mentioned purpose of the invention, using following technical scheme:
A kind of handle of automobile roof, the ceiling handle are made by comprising the following components in parts by weight:
Acrylic resin containing antimony: 60-80 parts；
Polyurethane: 10-30 parts；
Filler: 5-10 parts；
Fire retardant: 2-8 parts；
Antioxidant: 0.1-2 parts
Processing aid: 0.5-5 parts.
PP composite material of the invention will contain antimony acrylic resin, polyurethane, filler, fire retardant, antioxidant, processing
Auxiliary agent carries out mixing acquisition, and acrylic resin containing antimony is to contain antimony element in polypropylene molecular chain, is maintaining material melt intensity
On the basis of effectively improve the melt flow rate (MFR) of acrylic resin, and the biggish polyurethane of intensity is used as melt enhancing
Agent is dispersed in polypropylene matrix, the synergistic effect of the two, to improve the melt strength of polypropylene material.
Preferably, the preparation method of the acrylic resin containing antimony is the following steps are included: by acrylic resin, inorganic antimony
Be dissolved in organic solvent, pyridine be added in whipping process, in nitrogen atmosphere, 10-20h is reacted at 20-40 DEG C, then from
The heart, sediment heating evaporation remove solvent to get acrylic resin containing antimony.
Acrylic resin reacts in nitrogen atmosphere with inorganic antimony, and antimony element may replace the active tertiary carbon position of acrylic resin
On hydrogen, introduce Sb in the side group of C-C, Sb is introduced in Polypropylene structural reduces material cohesive energy, so that Polypropylene structural is easy
It is rotated in around Sb, to improve the MFR of acrylic resin from molecule origin, and the promotion of such solution flow rate will not
Bring the decline of melt strength.
The organic solvent is the solvent of any dissolvable acrylic resin, such as toluene, chloroform.
Preferably, the mass ratio of the acrylic resin and inorganic antimony is 5-20:1.
Preferably, the acrylic resin is made of high molecular weight polypropylene and low-molecular-weight polypropylene, wherein high score
Polyacrylic (230 DEG C, 2.16kg load) of melt flow rate (MFR) of son amount are 1-20g/10min, the melt of low-molecular-weight polypropylene
(230 DEG C, 2.16kg load) of flow rate are 500-2000g/10min.
Acrylic resin of the invention is made of high molecular weight polypropylene and low-molecular-weight polypropylene, polypropylene melt flow
Rate is directly related with polyacrylic average molecular weight, and molecular weight is bigger, it is however generally that, then melt flow rate (MFR) is smaller, conversely,
Molecular weight is smaller, then melt flow rate (MFR) is bigger, therefore the high molecular weight polypropylene that the present invention uses is defined as melt flows speed
The polypropylene that rate (gained under 230 DEG C, 2.16kg load) is 1-20g/10min, the low-molecular-weight polypropylene of use are defined as
(230 DEG C, 2.16kg load) of the melt flow rate (MFR) polypropylene for 500-2000g/10min.High molecular weight polypropylene strand
In there are long-chain branch so that the polymer is a kind of high melt strength, propylene, and low-molecular-weight polypropylene mobility is very good.
It using low-molecular-weight polypropylene as melt-flow enhancers, is mixed with high molecular weight polypropylene, high-molecular-weight poly can be maintained
The high fondant-strength of propylene, and improve melt flow rate (MFR).
Preferably, the acrylic resin is gathered by 70-85wt% high molecular weight polypropylene and 15-30wt% low molecular weight
Propylene composition.Low-molecular-weight polypropylene cannot be too big in the accounting of acrylic resin, and it is strong that content will affect melt polypropylene too much
Degree.
Preferably, the inorganic antimony be antimony trichloride, antimony trifluoride, antimony pentafluoride, Antimony pentachloride it is one or more.
In above-mentioned reaction process, antimony ion is easily separated and replaces the hydrogen ion on polypropylene tertiary carbon for antimony chloride or antimony fluoride,
Substituted parent's ion and chloride ion or fluorine ion generate volatile hydrogen chloride or hydrogen fluoride gas, and the pyridine of addition can
With the hydrogen chloride or hydrogen fluoride gas gone out in removing system.Therefore the supply of antimony chloride or antimony fluoride as antimony element is used
Person can promote antimony to replace polypropylene reaction.
Preferably, the polyurethane is polyether polyurethane, melt flow rate (MFR) (230 DEG C, 2.16kg load) is
5-40g/10min.Because of the presence of ehter bond, strand rotates around ehter bond, shows good submissive polyether polyurethane strand
Property, polyether polyurethane with it is polypropene blended, the mobility of material can also be improved while enhancing intensity.It is total according to polymer
Mixed rheology principle, two-phase macromolecule melt viscosity or mobility are close, easily uniformly mixing, if viscosity or mobility difference compared with
Greatly, the flow fractionations phenomenon such as Yi Fasheng " Soft Roll is hard " or particle migration influences that quality is blended, therefore according to high-molecular-weight poly third
The melt flow rate (MFR) of the acrylic resin containing antimony of alkene and low-molecular-weight polypropylene composition, selection and polyurethane similar in its MFR
Material cladding.
Filler of the present invention is usually used in improving material in prior art for improving the intensity of polypropylene material
The substance of material intensity all can serve as filler of the invention, such as glass fibre, carbon fiber, calcium carbonate, calcium silicates, mica, carbonic acid
Calcium pyroborate, aluminium borate whisker etc., the nanostructure substance reinforcing effect of the above compound is more preferably.
Fire retardant used in the present invention can be solid flame retardant commonly used in the art, preferably magnesium hydroxide,
Aluminium hydroxide, antimony oxide, deca-BDE, zinc borate, ammonium polyphosphate, 70% chlorinated paraffin or combinations thereof.The present invention is also
It may include 0.5-2 parts of flame retardant, be selected from stibate, borate, metaborate, molybdenum oxide, polytetrafluoroethylene (PTFE), phosphorous acid
The mixture of esters and/or these compounds.The flame retarding efficiency of fire retardant, oxygen can be improved in stibate, borate, metaborate
Changing molybdenum has suppression cigarette effect, and polytetrafluoroethylene (PTFE) prevents melting from dripping, and phosphorous acid esters prevent remaining combustion in burning
Effect.Keep flame retardant effect more significant using a variety of fire retardants and flame retardant are compound.
Antioxidant used in the present invention include one of Hinered phenols antioxidant or phosphite ester antioxidant or
Two kinds of compoundings, the Hinered phenols antioxidant includes at least one of antioxidant 1010,736,264,1098,300, the phosphorous
Esters of gallic acid antioxidant includes at least one of irgasfos 168, P-EPQ, 618,626.Using the compound antioxygen of above compound
Agent system can play the antiageing effect of antioxidant to the maximum extent.If antioxidant is 1010,736 and 168.
Processing aid of the present invention can be such as compatilizer, lubricant.Wherein compatilizer such as PE-g-MAH, PP-
G-MA, EVA-g-MAH, POE-g-MAH, EPDM-g-MAH, SMA resin etc., compatilizer improve between polypropylene and other components
Interface binding power, improve ingredient between compatibility；Lubricant have calcium stearate, zinc stearate, stearic acid, White Mineral Oil,
EBS, silicone compound etc., these lubricants are effectively improved the dispersibility of each component, reduce plastic melt in metal surface
Adhesion strength and melt in part frictional force, improve processing quality.The dosage of these common processing aids is conventional amount used,
Or requirement according to the actual situation carries out appropriate adjustment.
Another object of the present invention is realized by technical solution once: a kind of preparation method of handle of automobile roof, institute
State preparation method the following steps are included:
(1) each component is weighed according to said ratio, is fed in screw extruder after mixing, extruding pelletization；
(2) pellet is sent into injection molding machine, melting pellet injects mold cavity by cast gate, after mold injection is full, protects
Pressure；
(3) the melting pellet by air inlet into mold cavity injects inert gas, and the inert gas pressure of injection is big
Partial melting pellet in injection molding stock pressure, mold cavity flows back into cast gate by inert gas promotion, forms hollow state；
(4) pressure maintaining, it is cooling, mold is opened, product is taken out.
In Gas-assisted Injection Molding, the inert gas flows direction of injection is contrary with melt Injection Molding, i.e. cast gate
Position and air inlet position are located at the both ends of mold, in this way, inert gas pushes melt flows, extra melt can be returned
It flows back in cast gate, compare traditional gas assisted molding: melt fill part mold, remainder are full of by gas push melt,
Be conducive to eliminate weld mark, reduce melt internal stress.
In the injection molding of step (2), melting pellet temperature is 190-230 DEG C, and mold temperature is 50-80 DEG C.Melt temperature
It having a certain impact with generation tool of the mold temperature to gas fingering defect in gas assisted molding, melt temperature is too high, and melt viscosity reduces,
Gas enters thin-wall regions easily against melt resistance, generates gas and refers to；And mold temperature is too high, same principle, is easy to produce
Gas refers to phenomenon, and mold temperature is too low, and temperature quickly reduces after melt injection mold, and inert gas hardly enters in melt.
Preferably, the dwell time in the step (2) is 1-5s, the dwell time in step (4) is 5-10s.Note
For a period of time, the suitable dwell time can reduce the internal stress of product for first pressure maintaining after modeling.Melt is cooling in pressure maintaining period to be received
Molten gap produced by contracting can push melt flows to fill by the inert gas being subsequently implanted into.Pressure maintaining in step (4) is by air flue
Interior gas provides, and is compacted melt, increases plastic density.
Preferably, the inert gas pressure of injection is 5-20MPa, temperature is lower than 30 DEG C, gas injection time 2-5s.
Gas can increase with the raising of gas pressure toward the phenomenon that periphery Melt penetration, therefore gas pressure increases by one
As for the inert gas pressure that will increase gas fingering defect, but inject need to be higher than melt pressure, such gas could push
Melt flows, and gas pressure is greater than injection molding stock pressure, gas could push the part melt in mold to flow back into cast gate,
Melt composition hollow state.
The inert gas is the mixture of nitrogen or carbon dioxide or nitrogen and carbon dioxide.
The present invention reduces " gas refers to " phenomenon by the procedure parameter in control gas assisted molding, reduces product surface weld mark,
Improve the appearance and performance of product.
Compared with prior art, the present invention has the following advantages:
(1) acrylic resin of the invention is made of high molecular weight polypropylene and low-molecular-weight polypropylene, high low molecular weight
Polypropylene mixing expands the distribution of polypropylene molecule amount, and low-molecular-weight polypropylene is as melt flow modifiers, so that polypropylene
Resin keeps increasing flow rate while high fondant-strength；
(2) present invention uses acrylic resin containing antimony, by introducing antimony in polypropylene molecular chain, so that Polypropylene structural
It is easy to rotate around Sb, to improve the MFR of acrylic resin from molecule origin；
(3) present invention is mixed with polypropylene using polyurethane as reinforcing agent to improve melt strength.
In general, polypropylene composite materials provided by the invention have high melt flow rate (MFR) and high melt simultaneously
Intensity advantageously forms appearance and handle of automobile roof product of good performance in Gas-assisted Injection Molding.
Specific embodiment
Below by specific embodiment the technical scheme of the present invention will be further described explanation.If without specified otherwise,
Raw material employed in the embodiment of the present invention is raw material commonly used in the art, and method employed in embodiment is this
The conventional method in field.
Melt flow rate (MFR) involved in the embodiment of the present invention, all to be measured under 230 DEG C, 2.16kg load, and with
G/10min is indicated.
Embodiment 1
The handle of automobile roof of the present embodiment is made of the component of following parts by weight:
Acrylic resin containing antimony: 70 parts；Polyether polyurethane: 20 parts；Glass fibre: 8 parts；Aluminium hydroxide: 4 parts；Oxidation
Molybdenum: 2 parts；Antioxidant 1010: 0.9 part；PP-g-MA:1 parts；Zinc stearate: 0.5 part.
Wherein, acrylic resin containing antimony is prepared by the following steps: acrylic resin, antimony trichloride being dissolved in chloroform, gathered
The mass ratio of allyl resin and antimony trichloride is 10:1, and pyridine is added in whipping process, in nitrogen atmosphere, reacts at 30 DEG C
20h is then centrifuged for, and sediment heating evaporation removes solvent to get acrylic resin containing antimony.Above-mentioned acrylic resin is by 80wt%
High molecular weight polypropylene and 20wt% low-molecular-weight polypropylene composition, wherein the melt flow rate (MFR) of high molecular weight polypropylene is
10g/10min, the melt flow rate (MFR) of low-molecular-weight polypropylene are 750g/10min.
Wherein, the melt flow rate (MFR) of polyether polyurethane is 25g/10min.
Each component is weighed according to said ratio, is fed in screw extruder after mixing, extruding pelletization；Part pellet is retained
To detect its melt strength and melt flow rate (MFR), other pellets are measured and are sent into injection molding machine, melting pellet is infused by cast gate
Enter mold cavity, when injection molding, the temperature for melting pellet is 200 DEG C, and mold temperature is 70 DEG C, after mold injection is full, pressure maintaining 1s；
Nitrogen is injected by melting pellet of the air inlet into mold cavity, the nitrogen pressure of injection is 10MPa, is greater than injection molding storing pressure
Power, the partial melting pellet in mold cavity flow back into cast gate by nitrogen promotion, form hollow state；Nitrogen pressure maintaining 6s, it is cooling,
Mold is opened, handle of automobile roof product is obtained.
Embodiment 2
The handle of automobile roof of the present embodiment is made of the component of following parts by weight:
Acrylic resin containing antimony: 60 parts；Polyether polyurethane: 10 parts；Carbon fiber: 5 parts；Deca-BDE: 4 parts；Antioxygen
1010:0.4 parts of agent；Irgasfos 168: 0.3 part；PP-g-MA:0.8 parts；White Mineral Oil: 0.5 part.
Wherein, acrylic resin containing antimony is prepared by the following steps: acrylic resin, antimony trichloride being dissolved in chloroform, gathered
The mass ratio of allyl resin and antimony trichloride is 8:1, and pyridine is added in whipping process, in nitrogen atmosphere, reacts at 25 DEG C
20h is then centrifuged for, and sediment heating evaporation removes solvent to get acrylic resin containing antimony.Above-mentioned acrylic resin is by 75wt%
High molecular weight polypropylene and 25wt% low-molecular-weight polypropylene composition, wherein the melt flow rate (MFR) of high molecular weight polypropylene is
6g/10min, the melt flow rate (MFR) of low-molecular-weight polypropylene are 1000g/10min.
Wherein, the melt flow rate (MFR) of polyether polyurethane is 21g/10min.
Each component is weighed according to said ratio, is fed in screw extruder after mixing, extruding pelletization；Part pellet is retained
To detect its melt strength and melt flow rate (MFR), other pellets are measured and are sent into injection molding machine, melting pellet is infused by cast gate
Enter mold cavity, when injection molding, the temperature for melting pellet is 210 DEG C, and mold temperature is 60 DEG C, after mold injection is full, pressure maintaining
1.5s；Nitrogen is injected by melting pellet of the air inlet into mold cavity, the nitrogen pressure of injection is 9MPa, is greater than injection molding storage
Expect pressure, the partial melting pellet in mold cavity flows back into cast gate by nitrogen promotion, forms hollow state；Nitrogen pressure maintaining 5s,
It is cooling, mold is opened, handle of automobile roof product is obtained.
Embodiment 3
The handle of automobile roof of the present embodiment is made of the component of following parts by weight:
Acrylic resin containing antimony: 80 parts；Polyether polyurethane: 30 parts；Calcium carbonate crystal whisker: 10 parts；Zinc borate: 6 parts；Antioxygen
1010:0.2 parts of agent；736:0.2 parts of antioxidant；Irgasfos 168: 0.2 part；PP-g-MA:1 parts；Calcium stearate: 1 part.
Wherein, acrylic resin containing antimony is prepared by the following steps: acrylic resin, antimony trifluoride being dissolved in chloroform, gathered
The mass ratio of allyl resin and antimony trifluoride is that pyridine is added in 15:1 whipping process, in nitrogen atmosphere, is reacted at 35 DEG C
18h is then centrifuged for, and sediment heating evaporation removes solvent to get acrylic resin containing antimony.Above-mentioned acrylic resin is by 85wt%
High molecular weight polypropylene and 15wt% low-molecular-weight polypropylene composition, wherein the melt flow rate (MFR) of high molecular weight polypropylene is
15g/10min, the melt flow rate (MFR) of low-molecular-weight polypropylene are 600g/10min.
Wherein, the melt flow rate (MFR) of polyether polyurethane is 27g/10min.
Each component is weighed according to said ratio, is fed in screw extruder after mixing, extruding pelletization；Part pellet is retained
To detect its melt strength and melt flow rate (MFR), other pellets are measured and are sent into injection molding machine, melting pellet is infused by cast gate
Enter mold cavity, when injection molding, the temperature for melting pellet is 190 DEG C, and mold temperature is 70 DEG C, after mold injection is full, pressure maintaining 2s；
Nitrogen is injected by melting pellet of the air inlet into mold cavity, the nitrogen pressure of injection is 14MPa, is greater than injection molding storing pressure
Power, the partial melting pellet in mold cavity flow back into cast gate by nitrogen promotion, form hollow state；Nitrogen pressure maintaining 7s, it is cooling,
Mold is opened, handle of automobile roof product is obtained.
Embodiment 4
The present embodiment and the experimental program of embodiment 1, which are distinguished, to be, the preparation process of acrylic resin containing antimony of the present embodiment
In, the mass ratio of acrylic resin and antimony trichloride is 25:1, and other contents are same as Example 1, do not repeat herein.
Embodiment 5
The present embodiment and the experimental program of embodiment 1, which are distinguished, to be, the preparation process of acrylic resin containing antimony of the present embodiment
In, the mass ratio of acrylic resin and antimony trichloride is 3:1, and other contents are same as Example 1, do not repeat herein.
Embodiment 6
The present embodiment and the experimental program of embodiment 1, which are distinguished, to be, the preparation process of acrylic resin containing antimony of the present embodiment
In, the acrylic resin raw material used is the high molecular weight polypropylene that melt flow rate (MFR) is 10g/10min, other contents and reality
It is identical to apply example 1, does not repeat herein.
Embodiment 7
The present embodiment and the experimental program of embodiment 1, which are distinguished, to be, the preparation process of acrylic resin containing antimony of the present embodiment
In, the acrylic resin raw material used is the low-molecular-weight polypropylene that melt flow rate (MFR) is 750g/10min, other contents with
Embodiment 1 is identical, does not repeat herein.
Embodiment 8
The present embodiment and the experimental program of embodiment 1, which are distinguished, to be, the preparation process of acrylic resin containing antimony of the present embodiment
In, the acrylic resin raw material that uses by the melt flow rate (MFR) of 60wt% be 10g/10min high molecular weight polypropylene and
The low-molecular-weight polypropylene that the melt flow rate (MFR) of 40wt% is 750g/10min forms, and other contents are same as Example 1, no
It repeats herein.
Embodiment 9
The present embodiment and the experimental program difference of embodiment 1 are that the polyurethane of the present embodiment is that melt flow rate (MFR) is
The polyester polyurethane of 25g/10min, other contents are same as Example 1, do not repeat herein.
Embodiment 10
The present embodiment and the experimental program difference of embodiment 1 are that the polyurethane of the present embodiment is that melt flow rate (MFR) is
The polyether polyurethane of 45g/10min, other contents are same as Example 1, do not repeat herein.
Embodiment 11
The present embodiment and the experimental program difference of embodiment 1 are that the polyurethane of the present embodiment is that melt flow rate (MFR) is
The polyether polyurethane of 3g/10min, other contents are same as Example 1, do not repeat herein.
In order to highlight technical effect brought by technical characteristic of the invention, following comparative example is specially designed.
Comparative example 1
Comparative example 1 the difference from embodiment 1 is that, comparative example 1 using without antimony acrylic resin and other components it is mixed
It closes, it is other same as Example 1.
Comparative example 2
Without including polyether polyurethane in the PP composite material of comparative example 2, but by at being grouped as: poly- containing antimony
Allyl resin: 90 parts；Glass fibre: 8 parts；Aluminium hydroxide: 4 parts；Molybdenum oxide: 2 parts；Antioxidant 1010: 0.9 part；PP-g-MA:1
Part；Zinc stearate: 0.5 part.It is other same as Example 1.
The PP composite material of embodiment 1-11 and comparative example 1-2 is detected through pellet obtained by screw extruder extruding pelletization
Melt strength and melt flow rate (MFR) (230 DEG C/2.16kg), the ceiling automobile handle product finally obtained it is maximum by calculating
Gas refers to size and most atmosphere fingerbreadth degree to characterize gas fingering defect in product, and drawing is characterized with notch impact strength and tensile strength
The mechanical property of hand.As a result see Table 1 for details.
Table 1
Embodiment 1-3 is the preferred embodiment of the present invention, and the PP composite material of acquisition shows high melt flow rate (MFR)
And high fondant-strength, in Gas-assisted Injection Molding, gas fingering defect is smaller, and the knob of acquisition has preferable mechanical property.And it is right
Ratio 1-2 is because lacking essential features of the present invention, and the flow rate and melt strength of PP composite material are low, gas fingering defect
Larger, corresponding is the reduction of plastic products mechanical property, therefore the notch impact strength of comparative example 1-2 and tensile strength are aobvious
Work is lower than
Embodiment 1.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can do various modifications or supplement or is substituted in a similar manner to described specific embodiment, but simultaneously
Spirit or beyond the scope defined by the appended claims of the invention is not deviated by.
Claims (10)
1. a kind of handle of automobile roof, which is characterized in that the ceiling handle is made by comprising the following components in parts by weight:
Acrylic resin containing antimony: 60-80 parts；
Polyurethane: 10-30 parts；
Filler: 5-10 parts；
Fire retardant: 2-8 parts；
Antioxidant: 0.1-2 parts
Processing aid: 0.5-5 parts.
2. ceiling handle according to claim 1, which is characterized in that the preparation method of the acrylic resin containing antimony includes
Following steps: acrylic resin, inorganic antimony being dissolved in organic solvent, pyridine is added in whipping process, in nitrogen atmosphere, in
10-20h is reacted at 20-40 DEG C, is then centrifuged for, sediment heating evaporation removes solvent to get acrylic resin containing antimony.
3. ceiling handle according to claim 2, which is characterized in that the mass ratio of the acrylic resin and inorganic antimony is
5-20:1。
4. ceiling handle according to claim 2 or 3, which is characterized in that the acrylic resin is by high-molecular-weight poly third
Alkene and low-molecular-weight polypropylene composition, wherein (230 DEG C, 2.16kg load) of the melt flow rate (MFR) of high molecular weight polypropylene are 1-
20g/10min, (230 DEG C, 2.16kg load) of melt flow rate (MFR) of low-molecular-weight polypropylene are 500-2000g/10min.
5. ceiling handle according to claim 4, which is characterized in that the acrylic resin is by 70-85wt% macromolecule
Measure polypropylene and 15-30wt% low-molecular-weight polypropylene composition.
6. ceiling handle according to claim 2 or 3, which is characterized in that the inorganic antimony is antimony trichloride, borontrifluoride
Antimony, antimony pentafluoride, Antimony pentachloride it is one or more.
7. ceiling handle according to claim 1, which is characterized in that the polyurethane is polyether polyurethane, melt
(230 DEG C, 2.16kg load) of flow rate are 5-40g/10min.
8. a kind of preparation method of handle of automobile roof as described in claim 1, which comprises the following steps:
(1) proportion described in accordance with the claim 1 weighs each component, feeds in screw extruder after mixing, extruding pelletization；
(2) pellet is sent into injection molding machine, melting pellet injects mold cavity, after mold injection is full, pressure maintaining by cast gate；
(3) the melting pellet by air inlet into mold cavity injects inert gas, and the inert gas pressure of injection is greater than note
Stock pressure is moulded, the partial melting pellet in mold cavity flows back into cast gate by inert gas promotion, forms hollow state；
(4) pressure maintaining, it is cooling, mold is opened, product is taken out.
9. preparation method according to claim 8, which is characterized in that the dwell time in the step (2) is 1-3s, step
Suddenly the dwell time in (4) is 5-10s.
10. preparation method according to claim 8, which is characterized in that the inert gas pressure of injection is 5-15MPa, temperature
Degree is lower than 30 DEG C, gas injection time 2-5s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811221695.0A CN109593267A (en) | 2018-10-19 | 2018-10-19 | A kind of handle of automobile roof and preparation method thereof |
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| CN201811221695.0A CN109593267A (en) | 2018-10-19 | 2018-10-19 | A kind of handle of automobile roof and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110747582A (en) * | 2019-10-30 | 2020-02-04 | 成都新柯力化工科技有限公司 | Self-reinforced polypropylene composite plastic geotextile and preparation method thereof |
| CN110797495A (en) * | 2019-09-28 | 2020-02-14 | 合肥国轩高科动力能源有限公司 | High-strength composite PE diaphragm and preparation method thereof |
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| CN110797495A (en) * | 2019-09-28 | 2020-02-14 | 合肥国轩高科动力能源有限公司 | High-strength composite PE diaphragm and preparation method thereof |
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