CN108395615A - A kind of method of VOC content in reduction composite plastic of polypropylene - Google Patents
A kind of method of VOC content in reduction composite plastic of polypropylene Download PDFInfo
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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
- B29C48/267—Intermediate treatments, e.g. relaxation, annealing or decompression step for the melt
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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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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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
- C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
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- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to composite plastic fields, disclose a kind of method reducing VOC content in composite plastic of polypropylene.Including following preparation process：（1）Raw material is mixed to get mixture according to following parts by weight：63 ~ 76 parts of acrylic resin, 20 ~ 30 parts of inorganic filler, 3 ~ 5 parts of toughener, 0.5 ~ 1 part of antioxidant, 0.5 ~ 1 part of coupling agent；（2）Melting mixing in double screw extruder is fed the mixture into, vapor damping is passed through with certain flow rate in extruder end, and solid oxygen is added in exhaust ports；（3）Fused materials are extruded and vacuum volatilization is to get low VOC composite plastic of polypropylene.The present invention prepares the method for low VOC content composite plastic of polypropylene compared with conventional method, and simple for process, low energy consumption, at low cost, and the energy lower alkyl diradical of Detachment Activity, removing VOC is more efficient, more environmentally friendly, can large-scale promotion application.
Description
Technical field
The present invention relates to composite plastic fields, disclose a kind of method reducing VOC content in composite plastic of polypropylene.
Background technology
Polypropylene is a kind of common plastics, and nontoxic, tasteless, density is small, and intensity, rigidity, hardness heat resistance are superior to low
Pressure polyethylene has higher counter-bending fatigue strength, can be used at 100 DEG C or so.With good electrical property and high-frequency insulation
Property is not influenced by humidity, but becomes fragile when low temperature, is not wear-resisting, is easy to aging.Suitable for make common mechanical part, corrosion-resistant part and absolutely
Edge part.Common acid, alkali organic solvent almost do not work to it, can be used for tableware.Therefore the scope of application is more and more wider.
In recent years, more and more stronger with the environmental consciousness of people, polypropylene is proposed in automotive interior material etc.
Increasingly higher demands.Wherein, low VOC materials become one of the field paid close attention to the most.VOC is volatile organic compound
Object, when the VOC in environment reaches a certain concentration, people can feel headache, Nausea and vomiting, weak etc. in the short time, when serious
It will appear twitch, stupor, and the liver, kidney, brain and nervous system of people can be hurt, after causing failure of memory etc. serious
Fruit.Therefore, reduce polypropylene material in VOC content become there is an urgent need to.
Currently, preparing low VOC polypropene compositions mainly passes through two methods：First, being controlled at synthesis end, subtract
Remaining solvent, monomer and catalyst etc. in few acrylic resin.By optimizing polymerization technique, increases purification step, reduce by third
Remaining low molecular weight volatile object in alkene polymerization process.Second method be during blending and modifying, by optimization processing technology,
Processing aid and addition VOC removers, adsorbent etc. prepare low VOC polypropylene.But there is complex process, energy consumption
The problems such as height, processing conditions requires harshness, is unfavorable for large-scale production.Therefore research reduces the new side of VOC in polypropylene plastics
Method becomes research emphasis.
Chinese invention patent application number 201610590108.X discloses a kind of preparation method of the acrylic resin of low VOC
And its acrylic resin prepared.Method includes：Polypropylene powder is blended with processing aid before granulation, first by polypropylene powder
It extracts through solvent soaking, then dries until powder is without weightlessness；Solvent be C6-C8 alkane, impregnate extraction temperature be 30~
60℃；Processing time is 8~72h；Drying temperature is 70~80 DEG C, and drying time is 4~6h.The acrylic resin of the invention
Total volatile organism (TVOC) is less than 40 μ gC/g, can be widely applied to the higher superior automobile inside gadget of environmental requirement, doctor
With with the fields such as packaging material for food.And operating procedure is simple and reliable in preparation process, and input cost is relatively low, well solves
The deficiencies in the prior art.
Chinese invention patent application number 201710347689.9 discloses a kind of low VOC polypropylene composite materials material of automotive trim
Material and preparation method thereof, preparation method includes the following steps：（1）By acrylic resin, glass fibre, VOC adsorbents, talcum
Powder, antioxidant, toughener are put into homogenizer and are uniformly mixed, and obtain mixture；（2）Mixture is put into twin-screw extrusion
It is melted in machine, extruding pelletization obtains pellet；（3）By step（2）Middle pellet drying, obtains automotive trim with low VOC polypropylene composite materials
Material.The low VOC PP composite materials of the invention automotive trim, preparation process are shone using supercritical fluid technique and ultraviolet lamp
It penetrates, and has used PERFORMANCE OF MODIFIED VERMICULITE as VOC adsorbents, greatly reduce the smell and VOC content of material itself.The automobile of preparation
Interior trim is reasonable with low VOC PP composite materials cost, and mechanical property is good, excellent combination property, can be by Shooting Technique easily
It is processed into variously-shaped part, particularly suitable for injection molding and the various automotive upholsteries of compression molding.
According to method that is above-mentioned, reducing polypropylene VOC contents at synthesis end in existing scheme, it is difficult to control following process
The generation of VOC in the process, and prepare low VOC polypropene compositions in processing link and mainly removed using various means
VOC through generation is not related to the generation process of VOC, can not tackle the problem at its root；Utilize free radical capture
The concentration that agent reduces alkyl diradical in process can prepare low VOC polypropene compositions, however, can only often capture
The higher peroxide of activity or alkoxy free group, it is very low with the reactivity of alkyl diradical, it can not effectively reduce in polypropylene
VOC, and process is complicated, and high energy consumption, the feature of environmental protection is poor, and the present invention proposes VOC in a kind of reduction composite plastic of polypropylene and contains
The method of amount can effectively solve above-mentioned technical problem.
Invention content
At present the VOC generated, nothing can only be removed using the method for VOC in wider reduction composite plastic of polypropylene
Method solves fundamental issue, and there are complex technical process, and high energy consumption can not effective lower alkyl freedom of Detachment Activity
Base, removing VOC efficiency is low, and the feature of environmental protection is poor.
To solve the above problems, the present invention uses following technical scheme：
The method of VOC content, the detailed process of preparation are in a kind of reduction composite plastic of polypropylene：
（1）Acrylic resin, inorganic filler, toughener, antioxidant and coupling agent are added in high-speed mixer, are blended uniformly,
Obtain mixture；
（2）By step（1）The mixture of gained adds twin-screw extrude melting mixing, in extruder end with certain flow rate
It is passed through vapor damping, and solid oxygen is added in exhaust ports；
（3）Fused materials are extruded and vacuum volatilization, and low VOC composite plastic of polypropylene is made.
Preferably, step（1）The inorganic filler be zinc oxide, titanium dioxide, barium sulfate, calcium carbonate, in talcum powder extremely
Few one kind.
Preferably, step（1）The toughener is liquid polysulfide rubber, liquid propene acid esters rubber, liquid polybutadiene
At least one of rubber, nitrile rubber, EP rubbers, butadiene-styrene rubber.
Preferably, step（1）The antioxidant be antioxidant 1010, irgasfos 168, antioxidant 626, antioxidant 1098,
At least one of antioxidant t501.
Preferably, step（1）The coupling agent is at least one of kh550, kh560, kh570, kh602, kh792.
Preferably, step（1）In the mixture, by weight, wherein：63 ~ 76 parts of acrylic resin, inorganic filler
20 ~ 30 parts, 3 ~ 5 parts of toughener, 0.5 ~ 1 part of antioxidant, 0.5 ~ 1 part of coupling agent.
Preferably, step（1）The rotating speed of the mixed at high speed is 120 ~ 150r/min, and heating temperature is 130 ~ 140 DEG C, is mixed
The conjunction time is 25 ~ 40min.
Preferably, step（2）The double screw extruder is in parallel double-screw extruder, conical double screw extruder
One kind, direction of rotation are in the same direction.
Preferably, step（2）The flow rates are 4 ~ 6mL/s.
Preferably, step（3）The vacuum degree of the vacuum volatilization is 20 ~ 30mbar.
By a kind of above-mentioned method reducing VOC content in composite plastic of polypropylene, by adding solid-state in extruder back segment
Oxygen and vapor, solid oxygen meet water after moment generate a large amount nascent oxygen, have very high activity, can efficiently with because of heat
The alkyl diradical reaction that degradation generates, the antioxidant for generating peroxy radical and being added are captured and are lost activity, significantly
Reduce VOC；Different from the method using physics desorption, low energy consumption, and step is simple, the energy lower alkyl diradical of Detachment Activity,
It is more efficient to remove VOC, it is more environmentally friendly.
The present invention provides a kind of methods of VOC content in reduction composite plastic of polypropylene to dash forward compared with prior art
The characteristics of going out and excellent effect are：
1, the side for reducing VOC content in composite plastic of polypropylene that solid oxygen and vapor are added using extruder back segment is proposed
Method.
2, pass through the high activity a large amount nascent oxygen generated in extruder back segment, the alkyl diradical for the generation that can effectively degrade
Reaction, while the antioxidant for generating peroxy radical and being added is captured and is lost activity, removing VOC is more efficient, obtained
Composite plastic of polypropylene VOC content is extremely low.
3, whole preparation process is different from the method using physics desorption, and simple for process, low energy consumption, at low cost, the feature of environmental protection
It is good, it can large-scale promotion application.
Specific implementation mode
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
（1）Acrylic resin, inorganic filler, toughener, antioxidant and coupling agent are added in high-speed mixer, are blended uniformly,
Obtain mixture；Inorganic filler is zinc oxide；Toughener is liquid polysulfide rubber；Antioxidant is antioxidant 1010；Coupling agent is
kh550；The rotating speed of mixed at high speed is 130r/min, and heating temperature is 136 DEG C, incorporation time 30min；
In mixture, by weight, wherein：67.5 parts of acrylic resin, 26 parts of inorganic filler, 5 parts of toughener, antioxidant
0.8 part, 0.7 part of coupling agent；
（2）By step（1）The mixture of gained adds twin-screw extrude melting mixing, in extruder end with certain flow rate
It is passed through vapor damping, and solid oxygen is added in exhaust ports；Double screw extruder is parallel double-screw extruder, direction of rotation
It is in the same direction；Flow rates are 5mL/s；
（3）Fused materials are extruded and vacuum volatilization, and low VOC composite plastic of polypropylene is made；The vacuum degree of vacuum volatilization is
26mbar。
Composite plastic of polypropylene made from the method for embodiment 1, VOC content are as shown in table 1.
Embodiment 2
（1）Acrylic resin, inorganic filler, toughener, antioxidant and coupling agent are added in high-speed mixer, are blended uniformly,
Obtain mixture；Inorganic filler is titanium dioxide；Toughener is liquid propene acid esters rubber；Antioxidant is irgasfos 168；Coupling agent
For kh560；The rotating speed of mixed at high speed is 120r/min, and heating temperature is 130 DEG C, incorporation time 40min；
In mixture, by weight, wherein：76 parts of acrylic resin, 20 parts of inorganic filler, 3 parts of toughener, antioxidant 0.5
Part, 0.5 part of coupling agent；
（2）By step（1）The mixture of gained adds twin-screw extrude melting mixing, in extruder end with certain flow rate
It is passed through vapor damping, and solid oxygen is added in exhaust ports；Double screw extruder is conical double screw extruder, direction of rotation
It is in the same direction；Flow rates are 4mL/s；
（3）Fused materials are extruded and vacuum volatilization, and low VOC composite plastic of polypropylene is made；The vacuum degree of vacuum volatilization is
20mbar。
Composite plastic of polypropylene made from the method for embodiment 2, VOC content are as shown in table 1.
Embodiment 3
（1）Acrylic resin, inorganic filler, toughener, antioxidant and coupling agent are added in high-speed mixer, are blended uniformly,
Obtain mixture；Inorganic filler is barium sulfate；Toughener is liquid polybutadiene rubber；Antioxidant is antioxidant 626；Coupling agent
For kh570；The rotating speed of mixed at high speed is 150r/min, and heating temperature is 140 DEG C, incorporation time 25min；
In mixture, by weight, wherein：63 parts of acrylic resin, it is inorganic fill out 0 part, it is 5 parts of toughener, 1 part of antioxidant, even
Join 1 part of agent；
（2）By step（1）The mixture of gained adds twin-screw extrude melting mixing, in extruder end with certain flow rate
It is passed through vapor damping, and solid oxygen is added in exhaust ports；Double screw extruder is parallel double-screw extruder, direction of rotation
It is in the same direction；Flow rates are 6mL/s；
（3）Fused materials are extruded and vacuum volatilization, and low VOC composite plastic of polypropylene is made；The vacuum degree of vacuum volatilization is
30mbar。
Composite plastic of polypropylene made from the method for embodiment 3, VOC content are as shown in table 1.
Embodiment 4
（1）Acrylic resin, inorganic filler, toughener, antioxidant and coupling agent are added in high-speed mixer, are blended uniformly,
Obtain mixture；Inorganic filler is calcium carbonate；Toughener is nitrile rubber；Antioxidant is antioxidant 1098；Coupling agent is
kh602；The rotating speed of mixed at high speed is 130r/min, and heating temperature is 130 DEG C, incorporation time 38min；
In mixture, by weight, wherein：73.7 parts of acrylic resin, 22 parts of inorganic filler, 3 parts of toughener, antioxidant
0.6 part, 0.7 part of coupling agent；
（2）By step（1）The mixture of gained adds twin-screw extrude melting mixing, in extruder end with certain flow rate
It is passed through vapor damping, and solid oxygen is added in exhaust ports；Double screw extruder is conical double screw extruder, direction of rotation
It is in the same direction；Flow rates are 4mL/s；
（3）Fused materials are extruded and vacuum volatilization, and low VOC composite plastic of polypropylene is made；The vacuum degree of vacuum volatilization is
22mbar。
Composite plastic of polypropylene made from the method for embodiment 4, TOC contents are as shown in table 1.
Embodiment 5
（1）Acrylic resin, inorganic filler, toughener, antioxidant and coupling agent are added in high-speed mixer, are blended uniformly,
Obtain mixture；Inorganic filler is talcum powder；Toughener is EP rubbers；Antioxidant is antioxidant t501；Coupling agent is
kh792；The rotating speed of mixed at high speed is 140r/min, and heating temperature is 140 DEG C, incorporation time 29min；
In mixture, by weight, wherein：66 parts of acrylic resin, 28 parts of inorganic filler, 4.3 parts of toughener, antioxidant
0.8 part, 0.9 part of coupling agent；
（2）By step（1）The mixture of gained adds twin-screw extrude melting mixing, in extruder end with certain flow rate
It is passed through vapor damping, and solid oxygen is added in exhaust ports；Double screw extruder is parallel double-screw extruder, direction of rotation
It is in the same direction；Flow rates are 6mL/s；
（3）Fused materials are extruded and vacuum volatilization, and low VOC composite plastic of polypropylene is made；The vacuum degree of vacuum volatilization is
27mbar。
Composite plastic of polypropylene made from the method for embodiment 5, VOC content are as shown in table 1.
Embodiment 6
（1）Acrylic resin, inorganic filler, toughener, antioxidant and coupling agent are added in high-speed mixer, are blended uniformly,
Obtain mixture；Inorganic filler is zinc oxide；Toughener is butadiene-styrene rubber；Antioxidant is antioxidant 1010；Coupling agent is
kh550；The rotating speed of mixed at high speed is 135r/min, and heating temperature is 135 DEG C, incorporation time 35min；
In mixture, by weight, wherein：69 parts of acrylic resin, 25 parts of inorganic filler, 4 parts of toughener, 1 part of antioxidant,
1 part of coupling agent；
（2）By step（1）The mixture of gained adds twin-screw extrude melting mixing, in extruder end with certain flow rate
It is passed through vapor damping, and solid oxygen is added in exhaust ports；Double screw extruder is conical double screw extruder, direction of rotation
It is in the same direction；Flow rates are 5mL/s；
（3）Fused materials are extruded and vacuum volatilization, and low VOC composite plastic of polypropylene is made；The vacuum degree of vacuum volatilization is
25mbar。
Composite plastic of polypropylene made from the method for embodiment 6, VOC content are as shown in table 1.
Comparative example 1
（1）Acrylic resin, inorganic filler, toughener, antioxidant and coupling agent are added in high-speed mixer, are blended uniformly,
Obtain mixture；Inorganic filler is zinc oxide；Toughener is butadiene-styrene rubber；Antioxidant is antioxidant 1010；Coupling agent is
kh550；The rotating speed of mixed at high speed is 135r/min, and heating temperature is 135 DEG C, incorporation time 35min；
In mixture, by weight, wherein：69 parts of acrylic resin, 25 parts of inorganic filler, 4 parts of toughener, 1 part of antioxidant,
1 part of coupling agent；
（2）By step（1）The mixture of gained adds twin-screw extrude melting mixing, and fused materials are extruded and vacuum is de-
It waves, composite plastic of polypropylene is made；Double screw extruder is conical double screw extruder, and direction of rotation is in the same direction；Vacuum volatilization
Vacuum degree be 25mbar.
Comparative example 1 does not add solid oxygen in extruder back segment and vapor, composite plastic of polypropylene obtained, VOC contain
Amount is as shown in table 1.
Above-described embodiment and comparative example are used with batch acrylic resin, and it is 560 that 120 DEG C, which measure VOC content,（μg·C/
g）, composite plastic of polypropylene is made in embodiment 1-6, comparative example 1 and is put into head space vial, is sealed after nitrogen displacement, merging top
In empty autosampler, direct injected product after heating 5h, detector is tested using gas chromatograph-hydrogen flameionization at 120 DEG C
Corresponding analysis is carried out to meteorology with gas chromatograph-mass spectrometer (GC-MS), measures VOC content, characterization reduces the effect of VOC content.
Table 1：
Claims (9)
1. a kind of method reducing VOC content in composite plastic of polypropylene, which is characterized in that the detailed process of preparation is：
（1）Acrylic resin, inorganic filler, toughener, antioxidant and coupling agent are added in high-speed mixer, are blended uniformly,
Obtain mixture；
（2）By step（1）The mixture of gained adds twin-screw extrude melting mixing, in extruder end with certain flow rate
It is passed through vapor damping, and solid oxygen is added in exhaust ports；
（3）Fused materials are extruded and vacuum volatilization, and low VOC composite plastic of polypropylene is made.
2. a kind of method reducing VOC content in composite plastic of polypropylene according to claim 1, it is characterised in that：Step
（1）The inorganic filler is at least one of zinc oxide, titanium dioxide, barium sulfate, calcium carbonate, talcum powder.
3. a kind of method reducing VOC content in composite plastic of polypropylene according to claim 1, it is characterised in that：Step
（1）The toughener is liquid polysulfide rubber, liquid propene acid esters rubber, liquid polybutadiene rubber, nitrile rubber, the third rubber of second
At least one of glue, butadiene-styrene rubber.
4. a kind of method reducing VOC content in composite plastic of polypropylene according to claim 1, it is characterised in that：Step
（1）The antioxidant is at least one in antioxidant 1010, irgasfos 168, antioxidant 626, antioxidant 1098, antioxidant t501
Kind.
5. a kind of method reducing VOC content in composite plastic of polypropylene according to claim 1, it is characterised in that：Step
（1）The coupling agent is at least one of kh550, kh560, kh570, kh602, kh792.
6. a kind of method reducing VOC content in composite plastic of polypropylene according to claim 1, it is characterised in that：Step
（1）In the mixture, by weight, wherein：63 ~ 76 parts of acrylic resin, 20 ~ 30 parts of inorganic filler, toughener 3 ~ 5
Part, 0.5 ~ 1 part of antioxidant, 0.5 ~ 1 part of coupling agent.
7. a kind of method reducing VOC content in composite plastic of polypropylene according to claim 1, it is characterised in that：Step
（1）The rotating speed of the mixed at high speed is 120 ~ 150r/min, and heating temperature is 130 ~ 140 DEG C, and incorporation time is 25 ~ 40min.
8. a kind of method reducing VOC content in composite plastic of polypropylene according to claim 1, it is characterised in that：Step
（2）The double screw extruder is one kind in parallel double-screw extruder, conical double screw extruder, and direction of rotation is same
To.
9. a kind of method reducing VOC content in composite plastic of polypropylene according to claim 1, it is characterised in that：Step
（2）The flow rates are 4 ~ 6mL/s.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109535568A (en) * | 2018-12-19 | 2019-03-29 | 上海睿聚环保科技有限公司 | A kind of low VOC regenerating polypropylene material and its preparation process |
| CN109705472A (en) * | 2019-01-24 | 2019-05-03 | 中山市绿浪助剂有限公司 | Plastic without pungent smell |
-
2018
- 2018-03-09 CN CN201810192407.7A patent/CN108395615A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109535568A (en) * | 2018-12-19 | 2019-03-29 | 上海睿聚环保科技有限公司 | A kind of low VOC regenerating polypropylene material and its preparation process |
| CN109535568B (en) * | 2018-12-19 | 2021-06-25 | 上海睿聚环保科技有限公司 | Low-VOC (volatile organic compound) regenerated polypropylene material and preparation process thereof |
| CN109705472A (en) * | 2019-01-24 | 2019-05-03 | 中山市绿浪助剂有限公司 | Plastic without pungent smell |
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Application publication date: 20180814 |
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