CN107474367A - A kind of feature master batch and its preparation technology - Google Patents
A kind of feature master batch and its preparation technology Download PDFInfo
- Publication number
- CN107474367A CN107474367A CN201710904980.1A CN201710904980A CN107474367A CN 107474367 A CN107474367 A CN 107474367A CN 201710904980 A CN201710904980 A CN 201710904980A CN 107474367 A CN107474367 A CN 107474367A
- Authority
- CN
- China
- Prior art keywords
- parts
- master batch
- feature master
- sulphur
- antistatic additive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
-
- 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a kind of feature master batch, the formula of its raw material by weight are as follows：35 55 parts of high-density polyethylene resin, modified 20 35 parts of easy hydrolysis degradable polyester, 20 35 parts of glycerin monostearate, 12 15 parts of carbon black, 12 15 parts of acrylic acid, 25 parts of sulphur, 25 parts of antioxidant, 14 parts of fire retardant, 14 parts of antistatic additive, 14 parts of dispersant.Present invention also offers a kind of preparation technology of feature master batch.The present invention has excellent anti-oxidant, fire-retardant and antistatic effect, and processability is good, easy to use, cost is low, wide adaptability, preparation technology is simple, and the deep percolation of irrigation water and fertilizer can also be effectively reduced, water and fertilizer utilization is improved, strengthens the water-retaining property of soil, the evaporation of soil moisture control, to meet the growth needs of plant.
Description
Technical field
The present invention relates to film material preparing technical field, more particularly to a kind of feature master batch and its preparation technology.
Background technology
China is traditional large agricultural country, in recent years, as high-efficiency water-saving agricultural, industrialized agriculture, drought-resistant agriculture etc. develop
Rapidly, therefore, market is increasing for the agricultural mulching demand for being capable of water conservation in recent years.
During mulch film is prepared, master batch is most important, and the full name plastic master batch of master batch, alias masterbatch is 80 years 20th century
A kind of plastic processing additives that generation development is stood up, it is made up of chemical assistant, vector resin and dispersant of excess etc..
Master batch is aggregation obtained from the pigment (dyestuff) of super quantity is uniformly attached in resin.Master batch refer to plastic processing into
During type, for operational convenience, required various auxiliary agents, filler are first carried out mixing with a small amount of vector resin
Refining, by particulate materials, referred to as master batch made from process such as the metering of the equipment such as extruder, mixing, melting, extrusion, pelletizings.It is female
What grain was made up of vector resin, various fillers and various auxiliary agents.The limit of auxiliary agent or the content of filler are than actual plastics in master batch
Requirement in product wants high several times to more than ten times.In molding process, it is necessary to according to the content about component in master batch
With the amount for needing to add in actual product, the proportioning of regulation master batch and matrix resin.Therefore, we have proposed a kind of function sexupara
Grain and its preparation technology.
The content of the invention
The present invention proposes a kind of feature master batch and its preparation technology, is asked with solve to propose in above-mentioned background technology
Topic.
The present invention proposes a kind of feature master batch, and the formula of its raw material by weight is as follows：High-density polyethylene resin 35-
55 parts, modified easy hydrolysis degradable polyester 20-35 parts, glycerin monostearate 20-35 parts, carbon black 12-15 parts, acrylic acid 12-15 parts, sulphur
Sulphur 2-5 parts, antioxidant 2-5 parts, fire retardant 1-4 parts, antistatic additive 1-4 parts, dispersant 1-4 parts.
Preferably, high-density polyethylene resin, modified easy hydrolysis degradable polyester, the weight ratio of glycerin monostearate are 40-50：
25-30：25-30.
Preferably, carbon black, the weight ratio of acrylic acid are 13-14：13-14.
Preferably, sulphur, the weight ratio of antioxidant are 3-4：3-4.
Preferably, fire retardant, antistatic additive, the weight ratio of dispersant are 2-3：2-3：2-3.
Preferably, the formula of its raw material by weight is as follows：
High-density polyethylene resin 40-50 parts, modified easy hydrolysis degradable polyester 25-30 parts, glycerin monostearate 25-30 parts,
Carbon black 13-14 parts, acrylic acid 13-14 parts, sulphur 3-4 parts, antioxidant 3-4 parts, fire retardant 2-3 parts, antistatic additive 2-3 parts, point
Powder 2-3 parts.
Present invention also offers a kind of preparation technology of feature master batch, comprise the following steps：
S1, high-density polyethylene resin in the formula, modified easy hydrolysis degradable polyester, glycerol monostearate are weighed by proportioning
Ester, carbon black, acrylic acid and sulphur, and be added in the reaction vessel equipped with sodium hydrate aqueous solution and be well mixed, and
The lower stirring reaction 15-25min under conditions of 40-55 degrees Celsius；
S2 and then mix 5-10min again in homogenizer, by carrying out melt blending in agitator, treat that its is complete
After full thawing, add antioxidant, fire retardant, antistatic additive and dispersant successively thereto, mix 10-20min, Ran Houtian again
Be added in plastic granulator successively by plastifying, filter, extrude, wire drawing, cooling, i.e. finished product, as feature after drying
Master batch.
Preferably, wherein the temperature control of the plastic granulator described in extrusion is at 200-300 degrees Celsius.
Preferably, the antistatic additive in S2 is specially derivative, quaternary ammonium salt, sulfuric ester, phosphate and the poly- second of amine
The mixture of glycol, and the derivative of amine, quaternary ammonium salt, the weight ratio of sulfuric ester, phosphate and polyethylene glycol is 1：0.2：
0.2：0.5.
The beneficial effects of the invention are as follows：The present invention when being produced applied to mulch film, by with excellent anti-oxidant, fire-retardant and
Antistatic effect, and processability is good, and easy to use, cost is low, and wide adaptability, preparation technology is simple, and can also effectively drop
The deep percolation of low irrigation water and fertilizer, water and fertilizer utilization is improved, strengthen the water-retaining property of soil, the evaporation of soil moisture control,
To meet the growth needs of plant.
Embodiment
With reference to specific embodiment, the present invention will be further described.
Embodiment 1
The present invention proposes a kind of feature master batch, and the formula of its raw material by weight is as follows：High-density polyethylene resin 35
Part, modified 20 parts of easy hydrolysis degradable polyester, 20 parts of glycerin monostearate, 12 parts of carbon black, 12 parts of acrylic acid, 2 parts of sulphur, antioxidant 2
Part, 1 part of fire retardant, 1 part of antistatic additive, 1 part of dispersant.
Present invention also offers a kind of preparation technology of feature master batch, comprise the following steps：
S1, high-density polyethylene resin in the formula, modified easy hydrolysis degradable polyester, glycerol monostearate are weighed by proportioning
Ester, carbon black, acrylic acid and sulphur, and be added in the reaction vessel equipped with sodium hydrate aqueous solution and be well mixed, and
The lower stirring reaction 15min under conditions of 40 degrees Celsius；
S2 and then mix 5min again in homogenizer, by carrying out melt blending in agitator, treat that it melts completely
After change, add antioxidant, fire retardant, antistatic additive and dispersant successively thereto, mix 10min again, be then added to modeling
Expect in comminutor successively by plastifying, filter, extrude, wire drawing, cooling, i.e. finished product, as feature master batch after drying.
The temperature control of plastic granulator is at 200 degrees Celsius wherein described in extrusion.
Antistatic additive in S2 is specially the mixed of the derivative of amine, quaternary ammonium salt, sulfuric ester, phosphate and polyethylene glycol
Compound, and the derivative of amine, quaternary ammonium salt, the weight ratio of sulfuric ester, phosphate and polyethylene glycol is 1：0.2：0.2：0.5.
Embodiment 2
The present invention proposes a kind of feature master batch, and the formula of its raw material by weight is as follows：High-density polyethylene resin 40
Part, modified 25 parts of easy hydrolysis degradable polyester, 25 parts of glycerin monostearate, 13 parts of carbon black, 13 parts of acrylic acid, 3 parts of sulphur, antioxidant 3
Part, 2 parts of fire retardant, 2 parts of antistatic additive, 2 parts of dispersant.
Present invention also offers a kind of preparation technology of feature master batch, comprise the following steps：
S1, high-density polyethylene resin in the formula, modified easy hydrolysis degradable polyester, glycerol monostearate are weighed by proportioning
Ester, carbon black, acrylic acid and sulphur, and be added in the reaction vessel equipped with sodium hydrate aqueous solution and be well mixed, and
The lower stirring reaction 18min under conditions of 45 degrees Celsius；
S2 and then mix 6min again in homogenizer, by carrying out melt blending in agitator, treat that it melts completely
After change, add antioxidant, fire retardant, antistatic additive and dispersant successively thereto, mix 14min again, be then added to modeling
Expect in comminutor successively by plastifying, filter, extrude, wire drawing, cooling, i.e. finished product, as feature master batch after drying.
The temperature control of plastic granulator is at 240 degrees Celsius wherein described in extrusion.
Antistatic additive in S2 is specially the mixed of the derivative of amine, quaternary ammonium salt, sulfuric ester, phosphate and polyethylene glycol
Compound, and the derivative of amine, quaternary ammonium salt, the weight ratio of sulfuric ester, phosphate and polyethylene glycol is 1：0.2：0.2：0.5.
Embodiment 3
The present invention proposes a kind of feature master batch, and the formula of its raw material by weight is as follows：High-density polyethylene resin 50
Part, modified 30 parts of easy hydrolysis degradable polyester, 30 parts of glycerin monostearate, 14 parts of carbon black, 14 parts of acrylic acid, 4 parts of sulphur, antioxidant 4
Part, 3 parts of fire retardant, 3 parts of antistatic additive, 3 parts of dispersant.
Present invention also offers a kind of preparation technology of feature master batch, comprise the following steps：
S1, high-density polyethylene resin in the formula, modified easy hydrolysis degradable polyester, glycerol monostearate are weighed by proportioning
Ester, carbon black, acrylic acid and sulphur, and be added in the reaction vessel equipped with sodium hydrate aqueous solution and be well mixed, and
The lower stirring reaction 22min under conditions of 50 degrees Celsius；
S2 and then mix 8min again in homogenizer, by carrying out melt blending in agitator, treat that it melts completely
After change, add antioxidant, fire retardant, antistatic additive and dispersant successively thereto, mix 18min again, be then added to modeling
Expect in comminutor successively by plastifying, filter, extrude, wire drawing, cooling, i.e. finished product, as feature master batch after drying.
The temperature control of plastic granulator is at 280 degrees Celsius wherein described in extrusion.
Antistatic additive in S2 is specially the mixed of the derivative of amine, quaternary ammonium salt, sulfuric ester, phosphate and polyethylene glycol
Compound, and the derivative of amine, quaternary ammonium salt, the weight ratio of sulfuric ester, phosphate and polyethylene glycol is 1：0.2：0.2：0.5.
Embodiment 4
The present invention proposes a kind of feature master batch, and the formula of its raw material by weight is as follows：High-density polyethylene resin 55
Part, modified 35 parts of easy hydrolysis degradable polyester, 35 parts of glycerin monostearate, 15 parts of carbon black, 15 parts of acrylic acid, 5 parts of sulphur, antioxidant 5
Part, 4 parts of fire retardant, 4 parts of antistatic additive, 4 parts of dispersant.
Present invention also offers a kind of preparation technology of feature master batch, comprise the following steps：
S1, high-density polyethylene resin in the formula, modified easy hydrolysis degradable polyester, glycerol monostearate are weighed by proportioning
Ester, carbon black, acrylic acid and sulphur, and be added in the reaction vessel equipped with sodium hydrate aqueous solution and be well mixed, and
The lower stirring reaction 25min under conditions of 55 degrees Celsius；
S2 and then mix 10min again in homogenizer, by carrying out melt blending in agitator, treat that its is complete
After thawing, add antioxidant, fire retardant, antistatic additive and dispersant successively thereto, mix 20min again, be then added to
In plastic granulator successively by plastifying, filter, extrude, wire drawing, cooling, i.e. finished product, as feature master batch after drying.
The temperature control of plastic granulator is at 300 degrees Celsius wherein described in extrusion.
Antistatic additive in S2 is specially the mixed of the derivative of amine, quaternary ammonium salt, sulfuric ester, phosphate and polyethylene glycol
Compound, and the derivative of amine, quaternary ammonium salt, the weight ratio of sulfuric ester, phosphate and polyethylene glycol is 1：0.2：0.2：0.5.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (9)
1. a kind of feature master batch, it is characterised in that the formula of its raw material by weight is as follows：High-density polyethylene resin 35-55
Part, modified easy hydrolysis degradable polyester 20-35 parts, glycerin monostearate 20-35 parts, carbon black 12-15 parts, acrylic acid 12-15 parts, sulphur
2-5 parts, antioxidant 2-5 parts, fire retardant 1-4 parts, antistatic additive 1-4 parts, dispersant 1-4 parts.
2. feature master batch according to claim 1, it is characterised in that high-density polyethylene resin, modified Yishui River depolymerization
Ester, the weight ratio of glycerin monostearate are 40-50：25-30：25-30.
3. feature master batch according to claim 1, it is characterised in that carbon black, the weight ratio of acrylic acid are 13-14：13-
14。
4. feature master batch according to claim 1, it is characterised in that sulphur, the weight ratio of antioxidant are 3-4：3-4.
5. feature master batch according to claim 1, it is characterised in that fire retardant, antistatic additive, the weight ratio of dispersant
For 2-3：2-3：2-3.
6. the feature master batch according to claim 2-5, it is characterised in that the formula of its raw material by weight is as follows：
High-density polyethylene resin 40-50 parts, modified easy hydrolysis degradable polyester 25-30 parts, glycerin monostearate 25-30 parts, carbon black
13-14 parts, acrylic acid 13-14 parts, sulphur 3-4 parts, antioxidant 3-4 parts, fire retardant 2-3 parts, antistatic additive 2-3 parts, dispersant
2-3 parts.
7. a kind of preparation technology of feature master batch according to claim 1, it is characterised in that comprise the following steps：
S1, weigh by proportioning high-density polyethylene resin in the formula, modified easy hydrolysis degradable polyester, glycerin monostearate,
Carbon black, acrylic acid and sulphur, and be added in the reaction vessel equipped with sodium hydrate aqueous solution and be well mixed, and
Lower stirring reaction 15-25min under conditions of 40-55 degrees Celsius；
S2 and then mix 5-10min again in homogenizer, by carrying out melt blending in agitator, treat that it melts completely
After change, add antioxidant, fire retardant, antistatic additive and dispersant successively thereto, mix 10-20min again, be then added to
In plastic granulator successively by plastifying, filter, extrude, wire drawing, cooling, i.e. finished product, as feature master batch after drying.
8. the preparation technology of feature master batch according to claim 7, it is characterised in that wherein described in extrusion
The temperature control of plastic granulator is at 200-300 degrees Celsius.
9. the preparation technology of feature master batch according to claim 7, it is characterised in that the antistatic additive in S2 is specific
For the mixture of the derivative of amine, quaternary ammonium salt, sulfuric ester, phosphate and polyethylene glycol, and the derivative of amine, quaternary ammonium salt, sulphur
The weight ratio of acid esters, phosphate and polyethylene glycol is 1：0.2：0.2：0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710904980.1A CN107474367A (en) | 2017-09-29 | 2017-09-29 | A kind of feature master batch and its preparation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710904980.1A CN107474367A (en) | 2017-09-29 | 2017-09-29 | A kind of feature master batch and its preparation technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107474367A true CN107474367A (en) | 2017-12-15 |
Family
ID=60604862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710904980.1A Pending CN107474367A (en) | 2017-09-29 | 2017-09-29 | A kind of feature master batch and its preparation technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107474367A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116355300A (en) * | 2019-04-29 | 2023-06-30 | 切弗朗菲利浦化学公司 | Additive system containing antioxidants and glyceryl stearate for improving the color of polyethylene resins |
-
2017
- 2017-09-29 CN CN201710904980.1A patent/CN107474367A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116355300A (en) * | 2019-04-29 | 2023-06-30 | 切弗朗菲利浦化学公司 | Additive system containing antioxidants and glyceryl stearate for improving the color of polyethylene resins |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102167647B (en) | Degradable composite coating material and preparation method and application thereof in controlled release fertilizer | |
| CN105860459A (en) | Preparation method of high-thermal-insulation/soil-moisture-preservation degradable agricultural mulching film material | |
| CN101973808A (en) | Starch coating material and application thereof in coated sustained/controlled release fertilizers | |
| CN103936501B (en) | A kind of biomass synthetic epoxy resin film-coated controlled release fertilizer and production method thereof | |
| CN102321284A (en) | Ratproof plastic drip irrigation tube/belt and preparation method thereof | |
| CN106752011A (en) | Wood plastic composite of high temperature process and preparation method thereof | |
| CN102154016A (en) | Liquid mulching film and producing and film forming methods | |
| CN103897112A (en) | Preparation method of super absorbent polymer (nitrogen) aquasorb-fertilizer | |
| CN101987898A (en) | Special modified superfine coal powder masterbatch for drip irrigation tape | |
| CN109206793A (en) | A kind of PVC synthetic resin watt and preparation method thereof | |
| CN107474367A (en) | A kind of feature master batch and its preparation technology | |
| CN106747771A (en) | A kind of high-efficient granule ammonium sulfate and preparation method thereof | |
| CN105272602A (en) | Starch and lotus leaf powder blended coating material as well as preparation method and application thereof | |
| CN102295934B (en) | Liquid agricultural mulching film and production method thereof | |
| CN103058762B (en) | Slow-release compound fertilizer suitable for fruit tree planting | |
| CN1309688C (en) | Controlled release combination of coating film for fertilizer and preparation method thereof | |
| CN113150747A (en) | Preparation method of temperature-control cell coat composite material containing polyethylene glycol | |
| CN104725647A (en) | Method for preparing urea formaldehyde foam powder for plant culture medium through one-step method | |
| CN104945682A (en) | Thermoplastic starch based mulching film composite material and method for preparing the same | |
| CN102408894A (en) | Liquid agricultural mulching film and production method thereof | |
| CN114591119A (en) | Degradable resin coated slow-release fertilizer and preparation method thereof | |
| CN108250700A (en) | A kind of environmentally-friendly plastic and preparation method and application | |
| CN109265280A (en) | A kind of agrochemical | |
| CN103849030A (en) | Polyethylene antistatic masterbatch and preparation method thereof | |
| CN117964926A (en) | Preparation and degradation method of controllable degradation mulch film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171215 |
|
| WD01 | Invention patent application deemed withdrawn after publication |