CN107189228A - A kind of polypropylene anti-bacterial plastic and preparation method thereof - Google Patents
A kind of polypropylene anti-bacterial plastic and preparation method thereof Download PDFInfo
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- CN107189228A CN107189228A CN201710616671.4A CN201710616671A CN107189228A CN 107189228 A CN107189228 A CN 107189228A CN 201710616671 A CN201710616671 A CN 201710616671A CN 107189228 A CN107189228 A CN 107189228A
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- polypropylene
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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
- 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
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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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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention provides a kind of polypropylene anti-bacterial plastic and preparation method thereof, after the inventive method is modified to polypropylene first with zeolite carrying silver antimicrobials and then is well mixed modified polypropylene with plasticizer, dispersant, antioxidant, toughener, injection machine die cavity integrated injection molding is injected into, finished product is obtained after cooling.It is of the invention to be blended by application high melt strength, propylene with plain polypropylene, the problem of solving the low caused low production efficiency of plain polypropylene melt strength and uneven container wall thickness.Zeolite carrying silver antimicrobials can well be combined with acrylic resin, improve the antibacterial activity of product.The antibiotic plastic of the present invention has the advantages that bacteria growing inhibiting, kills bacterium and environmental protection；Simple production process, machine-shaping is convenient, and material is easy to get, cheap.The antibiotic plastic can be applied to make the packaging material of daily chemical product, with extensive market prospects.
Description
Technical field
The present invention relates to consumer goods industries, more particularly, to a kind of polypropylene anti-bacterial plastic and preparation method thereof.
Background technology
Polypropylene be by propylene polymerization prepared by a kind of thermoplastic resin.Polypropylene is nontoxic, odorless, tasteless milky white
The highly crystalline polymer of color, is one of kind most light in current all plastics.Polypropylene has many good characteristics：It is relatively close
Degree is small；Good mechanical property, moulding processability is good；With higher heat resistance, continuous temperature in use is up to 110-120
℃；Chemical property is good, is not reacted with most chemicals；Quality is pure, non-toxic；The transparency of polypropylene articles is than high
Density polyethylene product it is transparent good.Polypropylene is one of purposes consumption most wide material in the world.But, different poly- third
The fusing point of alkene is low, toughness is also poor, exactly because the rare application on high-end product by it of these raw materials.
High melt strength, propylene tree have higher melt strength, its tensile viscosity with shear stress and time increase
And increase, substantially, can be promoted in terms of thermoforming, Blown Film, Extrusion Coating, extrusion foaming should for strain hardening behavior
With.Especially in terms of plain polypropylene extruded foaming materials, effect significantly, solves plain polypropylene and is difficult to foaming processing
The problem of.Expanded polypropylene beads and foaming polypropylene sheet are successfully prepared using the high melt strength, propylene of preparation,
The rate of closed hole of the abscess of this kind of expanded material is high, has the advantages that light weight, intensity is high, cost is low, with excellent comprehensive
Can, added value of product is high, can apply to the fields such as the vehicles, insulation, high-grade packaging.
The antiseptic commonly used in antibiotic plastic mainly has inorganic silver system antibacterial and the major class of organic antibacterial agent two.Organic antibacterial agent
Species is more, but most of poor heat resistance, easy to change, security are low.Inorganic silver-series antibacterial agent is heat-resist, safe.Boiling
Stone is a kind of natural nano-material, with multi-cellular structure feature., can be by using ion exchange method using its architectural feature
The displacement of the antibacterial metal ions such as Ag+ enters zeolite micropore, and zeolite carrying silver antimicrobials are made.This kind of nano antibacterial agent can be as auxiliary
Material is used for preparing antibiotic plastic with polypropylene, and this is the focus of antibacterial area research in recent years.
The content of the invention
The invention provides a kind of polypropylene anti-bacterial plastic and preparation method thereof, its preparation method comprises the following steps：
(1) plain polypropylene particle 70-85% is weighed according to percent mass ratio, high melt strength, propylene 10-15%, zeolite is carried
Silver antibacterial agent 0.5-2%, is sufficiently mixed uniformly obtained compound, is placed in 80-100 DEG C of vacuum drying chamber and dries 1-2 hours,
Dried compound is put into dispersion machine and disperseed, is taken out after 50-70 minutes, 100-140 DEG C of vacuum drying is placed in
Dried 1.5-3 hours in case, obtain modified polypropene hybrid particles；
(2) the modified polypropene hybrid particles for obtaining step (1), plasticizer 1-3%, dispersant 2-6%, antioxidant 0.5-2%,
Toughener 1-2% is added in mixer and mixed, and is mixed 4-10 minutes at 70-80 DEG C, is obtained compound；
(3) compound obtained step (2) adds double screw extruder extruding pelletization, and rotating speed is 200r/min, extruder from
The temperature for being fed to head is respectively 180 DEG C, 190 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 185 DEG C, so as to obtain pellet；
(4) pellet for obtaining step (3) is placed in 110 DEG C of vacuum drying chamber and dried 4 hours, and pellet particle is placed in into extrusion
Machine, is cooled down after melting extrusion, then cuts into the plastic grain that particle diameter size is 10-20mm by comminutor；
(5) inputted after the plastic grain for obtaining step (4) is fully mixed by conveyer belt in injection machine die cavity, by packing material
In the shaping of injection machine die cavity integrated injection molding, the polypropylene anti-bacterial plastic is obtained；Wherein, controlling reaction temperature in injection machine die cavity
Stabilization is 150 ± 2oC, prevents from causing plastic grain to melt and cause molding rate not high because temperature is too high.
Preferably, plasticizer is selected from least one in dibutyl phthalate and phthalic acid two (2- ethyl hexyls) ester
Kind；Dispersant is selected from least one of Tissuemat E and polypropylene wax；Antioxidant is selected from least one of 3114 and 1010；
Toughener is selected from least one of haloflex and ethylene-vinyl acetate copolymer.
The polypropylene anti-bacterial plastic of the present invention, as prepared by above-mentioned preparation method.
It is certain by addition in its preparation process the invention provides a kind of polypropylene anti-bacterial plastic and preparation method thereof
The high melt strength, propylene particle of ratio, overcomes that plain polypropylene particle fusing point is low, poor toughness shortcoming, effectively increases
It reduces production cost, enhances the resistant to elevated temperatures performance of plastics, improve in the success rate of plastics preparation process kind blow molding
Product quality.The introducing of zeolite carrying silver antimicrobials can ideally be combined with PP GRANULES simultaneously, and its antibacterial species is more, safety
Property it is high, substantially increase the competitiveness of product in market, the antibiotic plastic can be applied to make the packaging material of daily chemical product, have
Extensive market prospects.
Embodiment
A kind of polypropylene anti-bacterial plastic and preparation method thereof, this method is mainly included the following steps that：
(1) plain polypropylene particle 70-85% is weighed according to percent mass ratio, high melt strength, propylene 10-15%, zeolite is carried
Silver antibacterial agent 0.5-2%, is sufficiently mixed uniformly obtained compound, is placed in 80-100 DEG C of vacuum drying chamber and dries 1-2 hours,
Dried compound is put into dispersion machine and disperseed, is taken out after 50-70 minutes, 100-140 DEG C of vacuum drying is placed in
Dried 1.5-3 hours in case, obtain modified polypropene hybrid particles；
(2) the modified polypropene hybrid particles for obtaining step (1), plasticizer 1-3%, dispersant 2-6%, antioxidant 0.5-2%,
Toughener 1-2% is added in mixer and mixed, and is mixed 4-10 minutes at 70-80 DEG C, is obtained compound；
(3) compound obtained step (2) adds double screw extruder extruding pelletization, and rotating speed is 200r/min, extruder from
The temperature for being fed to head is respectively 180 DEG C, 190 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 185 DEG C, so as to obtain pellet；
(4) pellet for obtaining step (3) is placed in 110 DEG C of vacuum drying chamber and dried 4 hours, and pellet particle is placed in into extrusion
Machine, is cooled down after melting extrusion, then cuts into the plastic grain that particle diameter size is 10-20mm by comminutor；
(5) inputted after the plastic grain for obtaining step (4) is fully mixed by conveyer belt in injection machine die cavity, by packing material
In the shaping of injection machine die cavity integrated injection molding.Controlling reaction temperature is stable 150 ± 2 in injection machine die cavityoC, is prevented because temperature
It is too high to cause plastic grain to melt and cause molding rate not high.
The present invention is described in further detail with reference to specific embodiment, but embodiments of the present invention are not limited to
This.
Embodiment 1
(1) plain polypropylene particle 70g, high melt strength, propylene 15g, zeolite carrying silver antimicrobials 2g are sufficiently mixed uniform system
Compound is obtained, is placed in 100 DEG C of vacuum drying chamber and dries 2 hours, dried compound is put into dispersion machine and divided
Dissipate, taken out after 70 minutes, be placed in 140 DEG C of vacuum drying chamber and dry 1.5 hours, obtain modified polypropene hybrid particles；
(2) the modified polypropene hybrid particles that obtain step (1), dibutyl phthalate 3g, Tissuemat E 6g, chlorination gather
Ethene 2g, the 2g of antioxidant 3110 are added in mixer and mixed, and are mixed 4 minutes at 70 DEG C, are obtained compound；
(3) compound obtained step (2) adds double screw extruder extruding pelletization, and rotating speed is 200r/min, extruder from
The temperature for being fed to head is respectively 180 DEG C, 190 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 185 DEG C, obtains pellet；
(4) pellet for obtaining step (3) is placed in 110 DEG C of vacuum drying chamber and dried 4 hours, and pellet particle is placed in into extrusion
Machine, is cooled down after melting extrusion, then cuts into the plastic grain that particle diameter size is 10-20mm by comminutor；
(5) inputted after the plastic grain for obtaining step (4) is fully mixed by conveyer belt in injection machine die cavity, by packing material
In the shaping of injection machine die cavity integrated injection molding, product is obtained.Controlling reaction temperature is stable 150 ± 2 in injection machine die cavityoC, prevent because
Plastic grain thawing is caused to cause molding rate not high for temperature is too high.
Embodiment 2
(1) plain polypropylene particle 75g, high melt strength, propylene 10g, zeolite carrying silver antimicrobials 2g are sufficiently mixed uniform system
Compound is obtained, is placed in 90 DEG C of vacuum drying chamber and dries 3 hours, dried compound is put into dispersion machine and divided
Dissipate, taken out after 50 minutes, be placed in 100 DEG C of vacuum drying chamber and dry 2 hours, obtain modified polypropene hybrid particles；
(2) modified polypropene hybrid particles, phthalic acid two (2- ethyl hexyls) ester 3g, the polypropylene wax obtained step (1)
6g, ethylene-vinyl acetate copolymer 2g, antioxidant 1010 2g are added in mixer and mixed, and are mixed 4 minutes, are obtained at 70 DEG C
To compound；
(3) compound obtained step (2) adds double screw extruder extruding pelletization, and rotating speed is 200r/min, extruder from
The temperature for being fed to head is respectively 180 DEG C, 190 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 185 DEG C, obtains pellet；
(4) pellet for obtaining step (3) is placed in 110 DEG C of vacuum drying chamber and dried 4 hours, and pellet particle is placed in into extrusion
Machine, is cooled down after melting extrusion, then cuts into the plastic grain that particle diameter size is 10-20mm by comminutor；
(5) inputted after the plastic grain for obtaining step (4) is fully mixed by conveyer belt in injection machine die cavity, by packing material
In the shaping of injection machine die cavity integrated injection molding, product is obtained.Controlling reaction temperature is stable 150 ± 2 in injection machine die cavityoC, prevent because
Plastic grain thawing is caused to cause molding rate not high for temperature is too high.
Embodiment 3
(1) plain polypropylene particle 80g, high melt strength, propylene 12g, zeolite carrying silver antimicrobials 1g are sufficiently mixed uniform system
Compound is obtained, is placed in 90 DEG C of vacuum drying chamber and dries 3 hours, dried compound is put into dispersion machine and divided
Dissipate, taken out after 50 minutes, be placed in 100 DEG C of vacuum drying chamber and dry 2 hours, obtain modified polypropene hybrid particles；
(2) modified polypropene hybrid particles, phthalic acid two (2- ethyl hexyls) ester 2g, the polypropylene wax obtained step (1)
3g, ethylene-vinyl acetate copolymer 1g, antioxidant 1010 1g are added in mixer and mixed, and are mixed 4 minutes, are obtained at 70 DEG C
To compound；
(3) compound obtained step (2) adds double screw extruder extruding pelletization, and rotating speed is 200r/min, extruder from
The temperature for being fed to head is respectively 180 DEG C, 190 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 185 DEG C, obtains pellet；
(4) pellet for obtaining step (3) is placed in 110 DEG C of vacuum drying chamber and dried 4 hours, and pellet particle is placed in into extrusion
Machine, is cooled down after melting extrusion, then cuts into the plastic grain that particle diameter size is 10-20mm by comminutor；
(5) inputted after the plastic grain for obtaining step (4) is fully mixed by conveyer belt in injection machine die cavity, by packing material
In the shaping of injection machine die cavity integrated injection molding, product is obtained.Controlling reaction temperature is stable 150 ± 2 in injection machine die cavityoC, prevent because
Plastic grain thawing is caused to cause molding rate not high for temperature is too high.
Embodiment 4
(1) plain polypropylene particle 75g, high melt strength, propylene 15g, zeolite carrying silver antimicrobials 2g are sufficiently mixed uniform system
Compound is obtained, is placed in 100 DEG C of vacuum drying chamber and dries 3 hours, dried compound is put into dispersion machine and divided
Dissipate, taken out after 50 minutes, be placed in 110 DEG C of vacuum drying chamber and dry 4 hours, obtain modified polypropene hybrid particles；
(2) modified polypropene hybrid particles, phthalic acid two (2- ethyl hexyls) ester 2g, the polypropylene wax obtained step (1)
4g, ethylene-vinyl acetate copolymer 1g, antioxidant 1010 1g are added in mixer and mixed, and are mixed 4 minutes, are obtained at 70 DEG C
To compound；
(3) compound obtained step (2) adds double screw extruder extruding pelletization, and rotating speed is 200r/min, extruder from
The temperature for being fed to head is respectively 180 DEG C, 190 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 185 DEG C, obtains pellet；
(4) pellet for obtaining step (3) is placed in 110 DEG C of vacuum drying chamber and dried 4 hours, and pellet particle is placed in into extrusion
Machine, is cooled down after melting extrusion, then cuts into the plastic grain that particle diameter size is 10-20mm by comminutor；
(5) inputted after the plastic grain for obtaining step (4) is fully mixed by conveyer belt in injection machine die cavity, by packing material
In the shaping of injection machine die cavity integrated injection molding, product is obtained.Controlling reaction temperature is stable 150 ± 2 in injection machine die cavityoC, prevent because
Plastic grain thawing is caused to cause molding rate not high for temperature is too high.
Embodiment 5
(1) plain polypropylene particle 80g, high melt strength, propylene 10g, zeolite carrying silver antimicrobials 1g are sufficiently mixed uniform system
Compound is obtained, is placed in 110 DEG C of vacuum drying chamber and dries 4 hours, dried compound is put into dispersion machine and divided
Dissipate, taken out after 50 minutes, be placed in 100 DEG C of vacuum drying chamber and dry 2 hours, obtain modified polypropene hybrid particles；
(2) modified polypropene hybrid particles, phthalic acid two (2- ethyl hexyls) ester 3g, the polypropylene wax obtained step (1)
3g, ethylene-vinyl acetate copolymer 2g, antioxidant 1010 1g are added in mixer and mixed, and are mixed 4 minutes, are obtained at 70 DEG C
To compound；
(3) compound obtained step (2) adds double screw extruder extruding pelletization, and rotating speed is 200r/min, extruder from
The temperature for being fed to head is respectively 180 DEG C, 190 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 185 DEG C, obtains pellet；
(4) pellet for obtaining step (3) is placed in 110 DEG C of vacuum drying chamber and dried 4 hours, and pellet particle is placed in into extrusion
Machine, is cooled down after melting extrusion, then cuts into the plastic grain that particle diameter size is 10-20mm by comminutor；
(5) inputted after the plastic grain for obtaining step (4) is fully mixed by conveyer belt in injection machine die cavity, by packing material
In the shaping of injection machine die cavity integrated injection molding, product is obtained.Controlling reaction temperature is stable 150 ± 2 in injection machine die cavityoC, prevent because
Plastic grain thawing is caused to cause molding rate not high for temperature is too high.
The performance indications of polypropylene anti-bacterial plastic obtained by the embodiment of the present invention of table 1
One embodiment of the present of invention is described in detail above, but the content is only the preferred embodiments of the present invention, no
The practical range for limiting the present invention can be considered as.Any changes and modifications in accordance with the scope of the present application,
Within the patent covering scope that the present invention should be belonged to.
Claims (6)
1. a kind of preparation method of polypropylene anti-bacterial plastic, it is characterised in that comprise the following steps：
(1) plain polypropylene particle 70-85% is weighed according to percent mass ratio, high melt strength, propylene 10-15%, zeolite is carried
Silver antibacterial agent 0.5-2%, is sufficiently mixed uniformly obtained compound, is placed in 80-100 DEG C of vacuum drying chamber and dries 1-2 hours,
Dried compound is put into dispersion machine and disperseed, is taken out after 50-70 minutes, 100-140 DEG C of vacuum drying is placed in
Dried 1.5-3 hours in case, obtain modified polypropene hybrid particles；
(2) the modified polypropene hybrid particles for obtaining step (1), plasticizer 1-3%, dispersant 2-6%, antioxidant 0.5-2%,
Toughener 1-2% is added in mixer and mixed, and is mixed 4-10 minutes at 70-80 DEG C, is obtained compound；
(3) compound obtained step (2) adds double screw extruder extruding pelletization, and rotating speed is 200r/min, extruder from
The temperature for being fed to head is respectively 180 DEG C, 190 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 185 DEG C, so as to obtain pellet；
(4) pellet for obtaining step (3) is placed in 110 DEG C of vacuum drying chamber and dried 4 hours, and pellet particle is placed in into extrusion
Machine, is cooled down after melting extrusion, then cuts into the plastic grain that particle diameter size is 10-20mm by comminutor；
(5) inputted after the plastic grain for obtaining step (4) is fully mixed by conveyer belt in injection machine die cavity, by packing material
In the shaping of injection machine die cavity integrated injection molding, the polypropylene anti-bacterial plastic is obtained；Wherein, controlling reaction temperature in injection machine die cavity
Stabilization is 150 ± 2oC, prevents from causing plastic grain to melt and cause molding rate not high because temperature is too high.
2. a kind of preparation method of polypropylene anti-bacterial plastic according to claim 1, it is characterised in that described plasticizer
Selected from least one of dibutyl phthalate and phthalic acid two (2- ethyl hexyls) ester.
3. a kind of preparation method of polypropylene anti-bacterial plastic according to claim 1, it is characterised in that described dispersant
Selected from least one of Tissuemat E and polypropylene wax.
4. a kind of preparation method of polypropylene anti-bacterial plastic according to claim 1, it is characterised in that described antioxidant
Selected from least one of 3114 and 1010.
5. a kind of preparation method of polypropylene anti-bacterial plastic according to claim 1, it is characterised in that described toughener
Selected from least one of haloflex and ethylene-vinyl acetate copolymer.
6. a kind of polypropylene anti-bacterial plastic, as prepared by the preparation method of any one in the claims 1-5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710616671.4A CN107189228A (en) | 2017-07-20 | 2017-07-20 | A kind of polypropylene anti-bacterial plastic and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710616671.4A CN107189228A (en) | 2017-07-20 | 2017-07-20 | A kind of polypropylene anti-bacterial plastic and preparation method thereof |
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| CN107189228A true CN107189228A (en) | 2017-09-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114350077A (en) * | 2022-01-18 | 2022-04-15 | 镇江市元润电子有限公司 | Preparation method of flame-retardant environment-friendly polypropylene plastic particles |
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|---|---|---|---|---|
| CN101870787A (en) * | 2010-07-20 | 2010-10-27 | 贵州盛峰药用包装有限公司 | Heat-resistance antibacterial polypropylene oral liquid medicament bottle and preparation method thereof |
| CN104119603A (en) * | 2013-04-29 | 2014-10-29 | 贵州千叶塑胶有限公司 | Polypropylene antibacterial plastic container and preparation method thereof |
| CN104118642A (en) * | 2013-04-25 | 2014-10-29 | 贵州千叶塑胶有限公司 | Antibacterial plastic container |
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2017
- 2017-07-20 CN CN201710616671.4A patent/CN107189228A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870787A (en) * | 2010-07-20 | 2010-10-27 | 贵州盛峰药用包装有限公司 | Heat-resistance antibacterial polypropylene oral liquid medicament bottle and preparation method thereof |
| CN104118642A (en) * | 2013-04-25 | 2014-10-29 | 贵州千叶塑胶有限公司 | Antibacterial plastic container |
| CN104119603A (en) * | 2013-04-29 | 2014-10-29 | 贵州千叶塑胶有限公司 | Polypropylene antibacterial plastic container and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114350077A (en) * | 2022-01-18 | 2022-04-15 | 镇江市元润电子有限公司 | Preparation method of flame-retardant environment-friendly polypropylene plastic particles |
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Application publication date: 20170922 |