CN108276679A - Toughening type PP plastic barrels and preparation method thereof - Google Patents
Toughening type PP plastic barrels and preparation method thereof Download PDFInfo
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- CN108276679A CN108276679A CN201810184871.1A CN201810184871A CN108276679A CN 108276679 A CN108276679 A CN 108276679A CN 201810184871 A CN201810184871 A CN 201810184871A CN 108276679 A CN108276679 A CN 108276679A
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
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Abstract
The invention discloses a kind of toughening type PP plastic barrels and preparation method thereof, belong to PP material product manufacture fields, its key points of the technical solution are that in terms of parts by weight, including 0.4 0.6 parts of 60 70 parts of PP, 12 14 parts of LLDPE, 10 20 parts of plasticized modifier, 46 parts of reinforced modifier, 0.5 1.5 parts of lubricant, 0.4 0.6 parts of antioxidant and ultra-violet absorber, plastic barrel is prepared by premix, mixture, extrusion and injection molding, has reached the toughness for capableing of reinforced plastics bucket and the technique effect for improving its intensity.
Description
Technical field
The present invention relates to PP material product manufacture fields, more particularly to a kind of toughening type PP plastic barrels and preparation method thereof.
Background technology
The material for being used to prepare plastic barrel mostly uses the thermoplastics such as polyethylene (PE), polypropylene (PP), usually adopts
It is made with blowing, injection molding, is chiefly used in containing industries liquid, the solids such as chemical industry, pesticide, medicine, food, hardware electronics, electromechanics
Product；PP bases plastic barrel is had outstanding performance in hardness, modulus and heat resistance etc., is more suitable for doing structural material use.
The prior art can refer to the Chinese patent that Authorization Notice No. is CN103601970B, and it discloses a kind of high intensity is saturating
Bright plastic barrel, consists of the following components in percentage by weight, polypropylene 50-80%, glass fibre 5-40%, plasticizer 1-5%,
Regenerate mulch 1-10%, clarifier 0.1-5%, fire retardant 0.5-1%, high intensity modified starch 1-5% and brightener 0.5-
1%；Plastic barrel is prepared by batch mixing, freezing, extrusion and blowing.
But since PP black brittleness is poor, notch impact strength is low, there is certain lack by plastic barrel prepared by PP base materials
It falls into, therefore how to improve its toughness is a problem to be solved.
Invention content
One of the objects of the present invention is to provide a kind of toughening type PP plastic barrels, using PP as basis material, the increasing of addition
Tough modifying agent can improve the toughness of plastic barrel, and the reinforced modifier of addition can improve the intensity of plastic barrel, to realize
The effect of its toughness is improved while not reducing PP original intensity.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of toughening type PP plastic barrels, in terms of parts by weight, including 60-70 parts of PP, 12-14 parts of LLDPE, plasticized modifier
10-20 parts, 4-6 parts of reinforced modifier, 0.5-1.5 parts of lubricant, 0.4-0.6 parts of antioxidant and ultra-violet absorber 0.4-
0.6 part；The melt index of PP is 2.4-2.5g/10min, density 0.898-0.902kg/m3；
The melt index of LLDPE is 1.8-2.2g/10min, density 0.923-0.927kg/m3；
Plasticized modifier includes maleic anhydride inoculated polypropylene, ethylene-octene copolymer (POE) and ethylene-ethylacrylate
Copolymer (EEA)；The weight ratio of the maleic anhydride inoculated polypropylene, POE and EEA is respectively 3：2：1；
Reinforced modifier includes maleic anhydride inoculated polypropylene and glass fibre；The maleic anhydride inoculated polypropylene and glass fibers
The weight ratio of dimension is 1：1；
The melt index of maleic anhydride inoculated polypropylene is 2.10-2.14g/10min.
By using said program, the intensity of LLDPE (linear low density polyethylene) is big, good toughness, rigidity are big, heat-resisting,
Cold resistance is good, and also there is good environmental stress crack resistance, the performances such as impact strength, tear-resistant intensity to compensate for PP's
The low disadvantage of poor toughness, impact strength.
Plasticized modifier includes maleic anhydride inoculated polypropylene, POE and EEA；POE plastic molecules amount narrowly distributings, have
Preferable mobility, it is good with the compatibility of polyolefin, there is excellent toughening effect to PP, but the addition of POE can make the drawing of system
Intensity, bending strength and bending modulus is stretched to be declined；EEA is that toughness and flexibility are maximum in polyolefin, is had higher
Thermal stability, excellent cryogenic property, weather resistance, resist bending cracking and Environmental Stress Cracking, can make up the resistance to of PP
The disadvantage of long property difference；Maleic anhydride inoculated polypropylene can improve the dispersion of POE and EEA in PP, improve PP stretching and
Impact strength can make up the defect that intensity caused by POE is lower to a certain extent.
Reinforced modifier includes maleic anhydride inoculated polypropylene and glass fibre, and glass fibre has good heat resistance
And mechanical strength, but because it is bad with the compatibility of PP, therefore the maleic anhydride grafting added in reinforced modifier is poly-
Propylene can greatly improve glass fibre and the compatibility and glass fibre of PP as the coupling agent between glass fibre and PP
Dispersibility；Reinforced modifier cooperates with plasticized modifier, and collaboration improves the intensity and toughness of PP.
Lubricant can improve the processing performance of PP and its auxiliary agent, increase the surface gloss of product.
Since the weatherability of PP is poor, easily aging, it is therefore necessary to add antioxidant and ultra-violet absorber to improve it
Weather resistance.
Preferably, in terms of parts by weight, including 65 parts of PP, 13 parts of LLDPE, 15 parts of plasticized modifier, reinforced modifier 5
Part, 1 part of lubricant, 0.5 part of antioxidant and 0.5 part of ultra-violet absorber；
The melt index of PP is 2.45g/10min, density 0.900kg/m3；
The melt index of LLDPE is 2.0g/10min, density 0.925kg/m3；
Plasticized modifier includes maleic anhydride inoculated polypropylene, ethylene-octene copolymer (POE) and ethylene-ethylacrylate
Copolymer (EEA)；The weight ratio of the maleic anhydride inoculated polypropylene, POE and EEA is respectively 3：2：1；
Reinforced modifier includes maleic anhydride inoculated polypropylene and glass fibre；The maleic anhydride inoculated polypropylene and glass fibers
The weight ratio of dimension is 1：1；
The melt index of maleic anhydride inoculated polypropylene is 2.12g/10min.
By using said program, PP, LLDPE, plasticized modifier, reinforced modifier, lubricant, antioxidant and ultraviolet
Plastic barrel obtained can be while increasing substantially its toughness under said ratio for light absorbers, and it is strong to increase it
The defects such as degree, various auxiliary agents cooperate, synergistic effect, and the weatherability for improving PP itself is poor, toughness is low.
Preferably, the PP is the impact copolymer polypropylene of K8003 types.
By using said program, PP selects K8003 type impact copolymer polypropylenes, basis material in the selection of raw material
For traditional PP, shock resistance higher increases the toughness of basis material.
Preferably, the lubricant is polyethylene wax.
By using said program, polyethylene wax, due to its excellent cold resistance, heat resistance, chemical resistance and wearability
It is widely used, the gloss and processing performance of product can be increased；As lubricant, chemical property stabilization, electrical property
Well, good with polyacrylic compatibility, polyacrylic release property can be improved, increase product surface glossiness, improve finished appearance；
The dispersibility of reinforcing aids.
Preferably, the antioxidant is antioxidant 1010.
By using said program, antioxidant 1010 is phenolic antioxidant, is one of outstanding kind of current antioxidant, right
Polypropylene has remarkable antioxygenic property, can effectively extend the service life of product；Volatility is very low, and not easy to migrate,
It can be effectively prevented thermal oxidative degradation of polymer material during long-term ageing, while being also a kind of efficient processing and lubrication
Agent can improve discoloration-resistant of polymer material under the conditions of high temperature process.
Preferably, the ultra-violet absorber is ultra-violet absorber UV-234.
By using said program, ultra-violet absorber UV-234 is excellent smooth lubrication prescription, is suitable for PP materials.
The second object of the present invention is to provide a kind of preparation method of toughening type PP plastic barrels.
The present invention above-mentioned technical purpose technical scheme is that：
The preparation method of toughening type PP plastic barrels, includes the following steps：
(1) premix：PP and LLDPE are placed in high-speed mixer, stirred 20-40 minutes at a temperature of 80-120 DEG C,
It is uniformly mixed；
(2) mixture：Plasticized modifier, reinforced modifier, lubricant, antioxidant and ultraviolet radiation absorption are added into premix
Agent is again stirring for being uniformly mixed；
(3) it squeezes out：Mixture is placed in melt blending in double screw extruder to squeeze out, it is 145-175 DEG C to control each area's temperature, is obtained
To blending composition granule；
(4) injection molding：Composition granule will be blended to be placed in injection molding machine, the barrel temperature of injection molding machine is 120-200 DEG C, nozzle temperature
It it is 190-200 DEG C, mold temperature is 40-80 DEG C, injecting rate 180-220mm/s, injection pressure 5.5-6.5MPa, pressurize
Pressure is 4-5MPa, injection time 5-7s, is molded and toughening type PP plastic barrels are made.
By using said program, by PP, LLDPE, plasticized modifier, reinforced modifier, lubricant, antioxidant and purple
Ultraviolet absorbers have good toughness and strong by plastic barrel made from premix, mixture, extrusion and injection molding
Degree.
Preferably, the mixing speed in the step (1) is 1000r/min.
By using said program, mixing speed 1000r/min is conducive to being sufficiently mixed for PP and LLDPE.
In conclusion the invention has the advantages that：
PP, LLDPE, plasticized modifier, reinforced modifier, lubricant, antioxidant and ultra-violet absorber pass through premix, mix
There is plastic barrel made from conjunction material, extrusion and injection molding good toughness and intensity, various auxiliary agents to cooperate, and assist
Same-action, defects that the weatherability that improves PP itself is poor, toughness is low etc..
Specific implementation mode
Invention is further described in detail below.
One, embodiment 1-3
Embodiment 1：A kind of toughening type PP plastic barrels are prepared with the following method：
(1) premix：65kg PP and 13kg LLDPE are placed in high-speed mixer, with 1000r/ at a temperature of 100 DEG C
The speed of min stirs 30 minutes, is uniformly mixed；
(2) mixture：Be added into premix 15kg plasticized modifiers (7.5kg maleic anhydride inoculated polypropylenes, 5kg POE,
2.5kg EEA), 5kg reinforced modifiers (2.5kg maleic anhydride inoculated polypropylenes, 2.5kg glass fibres), 1kg polyethylene waxes,
0.5kg antioxidant 1010s and 0.5kg ultra-violet absorber UV-234, are again stirring for being uniformly mixed；
(3) it squeezes out：Mixture is placed in melt blending in double screw extruder to squeeze out, one area's temperature of control is 145 DEG C, two area's temperature
Degree is 150 DEG C, three area's temperature are 160 DEG C, four area's temperature are 170 DEG C, five area's temperature are 175 DEG C, obtains that composition granule is blended；
(4) injection molding：Composition granule will be blended to be placed in injection molding machine, the barrel temperature of injection molding machine is 160 DEG C, and nozzle temperature is
195 DEG C, mold temperature is 60 DEG C, injecting rate 200mm/s, injection pressure 6MPa, dwell pressure 4.5MPa, when injection
Between be 6s, be molded and toughening type PP plastic barrels be made.
Wherein, the melt index of PP is 2.45g/10min, density 0.900kg/m3；The melt index of LLDPE is
2.0g/10min density 0.925kg/m3；The melt index of maleic anhydride inoculated polypropylene is 2.12g/10min.
Embodiment 2：A kind of toughening type PP plastic barrels are prepared with the following method：
(1) premix：60kg PP and 12kg LLDPE are placed in high-speed mixer, with 1000r/ at a temperature of 80 DEG C
The speed of min stirs 40 minutes, is uniformly mixed；
(2) mixture：Be added into premix 10kg plasticized modifiers (5kg maleic anhydride inoculated polypropylenes, 3.3kg POE,
1.7kg EEA), 5kg reinforced modifiers (2kg maleic anhydride inoculated polypropylenes, 2kg glass fibres), 0.5kg polyethylene waxes,
0.4kg antioxidant 1010s and 0.4kg ultra-violet absorber UV-234, are again stirring for being uniformly mixed；
(3) it squeezes out：Mixture is placed in melt blending in double screw extruder to squeeze out, one area's temperature of control is 145 DEG C, two area's temperature
Degree is 150 DEG C, three area's temperature are 160 DEG C, four area's temperature are 170 DEG C, five area's temperature are 175 DEG C, obtains that composition granule is blended；
(4) injection molding：Composition granule will be blended to be placed in injection molding machine, the barrel temperature of injection molding machine is 120 DEG C, and nozzle temperature is
190 DEG C, mold temperature is 40 DEG C, injecting rate 180mm/s, injection pressure 5.5MPa, dwell pressure 4MPa, when injection
Between be 7s, be molded and toughening type PP plastic barrels be made.
Wherein, the melt index of PP is 2.4g/10min, density 0.898kg/m3；The melt index of LLDPE is 1.8g/
10min, density 0.923kg/m3；The melt index of maleic anhydride inoculated polypropylene is 2.10g/10min.
Embodiment 3：A kind of toughening type PP plastic barrels are prepared with the following method：
(1) premix：70kg PP and 14kg LLDPE are placed in high-speed mixer, with 1000r/ at a temperature of 120 DEG C
The speed of min stirs 20 minutes, is uniformly mixed；
(2) mixture：Be added into premix 20kg plasticized modifiers (10kg maleic anhydride inoculated polypropylenes, 6.7kg POE,
3.3kg EEA), 6kg reinforced modifiers (3kg maleic anhydride inoculated polypropylenes, 3kg glass fibres), 1.5kg polyethylene waxes,
0.6kg antioxidant 1010s and 0.6kg ultra-violet absorber UV-234, are again stirring for being uniformly mixed；
(3) it squeezes out：Mixture is placed in melt blending in double screw extruder to squeeze out, one area's temperature of control is 145 DEG C, two area's temperature
Degree is 150 DEG C, three area's temperature are 160 DEG C, four area's temperature are 170 DEG C, five area's temperature are 175 DEG C, obtains that composition granule is blended；
(4) injection molding：Composition granule will be blended to be placed in injection molding machine, the barrel temperature of injection molding machine is 200 DEG C, and nozzle temperature is
200 DEG C, mold temperature is 80 DEG C, injecting rate 220mm/s, injection pressure 6.5MPa, dwell pressure 5MPa, when injection
Between be 5s, be molded and toughening type PP plastic barrels be made.
Wherein, the melt index of PP is 2.5g/10min, density 0.902kg/m3；The melt index of LLDPE is 2.2g/
10min, density 0.927kg/m3；The melt index of maleic anhydride inoculated polypropylene is 2.14g/10min.
Two, comparative example 1-2
Comparative example 1:Use Authorization Notice No. for the Chinese patent of CN103601970B, it discloses a kind of high-strength transparence plastics
Bucket, consists of the following components in percentage by weight, polypropylene 50-80%, glass fibre 5-40%, plasticizer 1-5%, again Radix Rehmanniae
Film 1-10%, clarifier 0.1-5%, fire retardant 0.5-1%, high intensity modified starch 1-5% and brightener 0.5-1%；Through
It crosses batch mixing, freezing, extrusion and blowing and prepares plastic barrel.
Comparative example 2：It uses Authorization Notice No. for the Chinese patent of CN103665546B, polypropylene is increased it discloses a kind of
The method of tough modification, component, component number and machining feature are：A. by polypropylene (PP), elastomer (POE), superelevation point
Sub- weight northylen (UHMWPE) and low density linear polyethylene (LLDPE) resin are dried at a temperature of 60-80 DEG C, and with PP：
POE：UHMWPE：LLDPE=100：3-25：2-15：The mass ratio of 5-20 completes mixing in homogenizer, obtains raw material A；
B. it is polypropylene stabilizer and lubricant, mass ratio to be added in raw material A：Stabilizer：Lubricant=100：0.2：1, and carry out
High-speed stirred mixes, and obtains raw material B；C. raw material B is subjected to twin-screw extrusion, the control of processing sections temperature is at 160 DEG C -210 DEG C, spiral shell
Bar rotating speed is controlled in 120-180rpm, obtains the polypropylene of toughening modifying.
Three, the performance of the embodiment 1-3 polypropylene materials prepared and comparative example the 1-2 polypropylene material prepared is carried out
Test, test result is shown in table 1.
The performance test table of PP materials prepared by 1 embodiment 1-3 of table and comparative example 1-2
As can be seen from the above data, in comparative example 1 PP materials tensile strength compared to embodiment 1-3 and comparative example 2 compared with
Height, but its Izod notched impact strength is significantly lower than embodiment 1-3 and comparative example 2, shows that its brittleness is larger, toughness
Low, the overall performance of material is bad；The Izod notched impact strength of PP materials in comparative example 2 is more advantageous, but it draws
It is relatively low compared with embodiment 1-3 and comparative example 2 to stretch intensity, after the performance which raises toughness, has centainly to the intensity of PP materials
Loss；Although and the single performance of the tensile strength and Izod notched impact strength in embodiment 1-3 is without too big
Advantage, but from the point of view of overall performance, the rigidity and toughness of PP materials are enhanced, and the overall performance of product is more
It is good.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as at this
It is all protected by Patent Law in the right of invention.
Claims (8)
1. a kind of toughening type PP plastic barrels, it is characterised in that：In terms of parts by weight, including 60-70 parts of PP, LLDPE 12-14
Part, 10-20 parts of plasticized modifier, 4-6 parts of reinforced modifier, 0.5-1.5 parts of lubricant, 0.4-0.6 parts of antioxidant and ultraviolet
0.4-0.6 parts of light absorbers；
The melt index of PP is 2.4-2.5g/10min, density 0.898-0.902kg/m3；
The melt index of LLDPE is 1.8-2.2g/10min, density 0.923-0.927kg/m3；
Plasticized modifier includes maleic anhydride inoculated polypropylene, ethylene-octene copolymer (POE) and ethylene-ethylacrylate
Copolymer (EEA)；The weight ratio of the maleic anhydride inoculated polypropylene, POE and EEA is respectively 3：2：1；
Reinforced modifier includes maleic anhydride inoculated polypropylene and glass fibre；The maleic anhydride inoculated polypropylene and glass fibers
The weight ratio of dimension is 1：1；
The melt index of maleic anhydride inoculated polypropylene is 2.10-2.14g/10min.
2. toughening type PP plastic barrels according to claim 1, it is characterised in that：In terms of parts by weight, including 65 parts of PP,
13 parts of LLDPE, 15 parts of plasticized modifier, 5 parts of reinforced modifier, 1 part of lubricant, 0.5 part of antioxidant and ultra-violet absorber
0.5 part；
The melt index of PP is 2.45g/10min, density 0.900kg/m3；
The melt index of LLDPE is 2.0g/10min, density 0.925kg/m3；
Plasticized modifier includes maleic anhydride inoculated polypropylene, ethylene-octene copolymer (POE) and ethylene-ethylacrylate
Copolymer (EEA)；The weight ratio of the maleic anhydride inoculated polypropylene, POE and EEA is respectively 3：2：1；
Reinforced modifier includes maleic anhydride inoculated polypropylene and glass fibre；The maleic anhydride inoculated polypropylene and glass fibers
The weight ratio of dimension is 1：1；
The melt index of maleic anhydride inoculated polypropylene is 2.12g/10min.
3. toughening type PP plastic barrels according to claim 1, it is characterised in that：The PP is the crushing-resistant copolymerization of K8003 types
Polypropylene.
4. toughening type PP plastic barrels according to claim 1, it is characterised in that：The lubricant is polyethylene wax.
5. toughening type PP plastic barrels according to claim 1, the antioxidant is antioxidant 1010.
6. toughening type PP plastic barrels according to claim 1, it is characterised in that：The ultra-violet absorber is inhaled for ultraviolet light
Receive agent UV-234.
7. the preparation method of toughening type PP plastic barrels, it is characterised in that：Include the following steps：
(1) premix：PP and LLDPE are placed in high-speed mixer, stirred 20-40 minutes at a temperature of 80-120 DEG C,
It is uniformly mixed；
(2) mixture：Plasticized modifier, reinforced modifier, lubricant, antioxidant and ultraviolet radiation absorption are added into premix
Agent is again stirring for being uniformly mixed；
(3) it squeezes out：Mixture is placed in melt blending in double screw extruder to squeeze out, it is 145-175 DEG C to control each area's temperature, is obtained
To blending composition granule；
(4) injection molding：Composition granule will be blended to be placed in injection molding machine, the barrel temperature of injection molding machine is 120-200 DEG C, nozzle temperature
It it is 190-200 DEG C, mold temperature is 40-80 DEG C, injecting rate 180-220mm/s, injection pressure 5.5-6.5MPa, pressurize
Pressure is 4-5MPa, injection time 5-7s, is molded and toughening type PP plastic barrels are made.
8. the preparation method of toughening type PP plastic barrels according to claim 7, it is characterised in that：In the step (1)
Mixing speed is 1000r/min.
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| CN109021395A (en) * | 2018-07-18 | 2018-12-18 | 合肥安力电力工程有限公司 | A kind of meter case material and preparation method thereof |
| CN109233114A (en) * | 2018-08-27 | 2019-01-18 | 扬中市惠丰包装有限公司 | A kind of low temperature Toughened PP plastic products and preparation method thereof |
| CN109337172A (en) * | 2018-10-12 | 2019-02-15 | 江门市恒荣塑料制品有限公司 | A kind of enhanced plastic bucket |
| CN109648728A (en) * | 2018-12-26 | 2019-04-19 | 柳州申通汽车科技有限公司 | The processing technology of activeness and quietness polypropylene material |
| CN109679211A (en) * | 2018-12-26 | 2019-04-26 | 常州胜威塑料有限公司 | A kind of antistatic reinforced polypropylene plastic barrel |
| CN109851921A (en) * | 2019-02-15 | 2019-06-07 | 天津瑞杰塑料制品有限公司 | A kind of high-performance polypropylene plastic barrel and preparation method thereof |
| CN111154186A (en) * | 2018-11-07 | 2020-05-15 | 内蒙古伊利实业集团股份有限公司 | Blend and container or container outer cover made of same |
| CN111716748A (en) * | 2020-06-23 | 2020-09-29 | 扬州耐盾桶业有限公司 | Energy-saving preparation method suitable for steel-plastic composite barrel |
| CN112852058A (en) * | 2021-02-02 | 2021-05-28 | 上海群骊企业(集团)有限公司 | Production process of plastic barrel |
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Application publication date: 20180713 |