CN108329571A - A kind of biodegradable polyethylene ground film composition and preparation method thereof - Google Patents
A kind of biodegradable polyethylene ground film composition and preparation method thereof Download PDFInfo
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- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—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
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- 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
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- 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
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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Abstract
The invention belongs to technical field of macromolecules, a kind of with disclosing biodegradable polyethylene film composition and preparation method thereof.Including 40~50 parts of low density polyethylene (LDPE), 10~20 parts of 50~60 parts of linear low density polyethylene and functional master batch；The functional master batch includes 50~60 parts of PBAT, 40~50 parts of calcium carbonate, 5~10 parts of metallocene PE, 0.05~0.01 part of fluoroelastomer, 4~7 parts of coupling agent, 2~4 parts of dispersant, 8~10 parts of solvent.The composition has good elongation percentage, mechanical strength and degradability.The degradation masterbatch dosage that the present invention uses is few, and method is simple, easy to operate, and degradation effect is apparent.
Description
Technical field
The invention belongs to technical field of macromolecules, a kind of more particularly, to biodegradable polyethylene film composition
And preparation method thereof.
Background technology
Polyethylene has good resistance to cracking, flexibility and optical property etc., can be widely applied to film, tubing, electricity
The fields such as cable, but the annual waste plastic for being largely unable to natural degradation can lead to serious environmental pollution, and soil environment is made to deteriorate,
Seriously affect the growth of crops.
Polyadipate/butylene terephthalate (PBAT) is tetramethylene adipate and mutual-phenenyl two acid bromide two alcohol ester
Copolymer is thermoplastic biodegradable plastics, has both the characteristic of PBA and PBT.The material not only has preferable ductility and breaks
Elongation is split, and has both preferable heat resistance and impact property；It is current life in addition, also having excellent biological degradability
Very active and market is using one of best degradable material in the research of object degradative plastics.
PBAT is a kind of semicrystalline polymer, and usual crystallization temperature is near 110 DEG C, and density is in 1.18g/cm3~
1.3g/cm3Between, the excellent degradation property of aliphatic polyester and the excellent mechanical performances of aromatic polyester are combined, and process
Performance is close with low density polyethylene (LDPE), therefore can be widely applied to the fields such as polyethylene kind film, bottle cap.
103819794 B of CN provide a kind of preparation method of Biodegradable mulch, it is characterised in that：Polyethylene：55~
60 parts；Tapioca：17~20 parts；Cornstarch：18~22 parts；Multi-element biologic carries depressant prescription：5~10 parts；The polyethylene, is pressed
Weight ratio：7050：68~90 parts, 1F7B：10~32 parts；The multi-element biologic carries depressant prescription, by weight proportion：Crosslinking agent：40
~80 parts；Degradation of promoter：20~40 parts.It provides one kind and adapting to different geographical environment, for Different Crop growth cycle
Controllable degradation time can process bichromal member, effectively inhibit weed growth, reduce pest and disease damage, and membrane body thickness is frivolous,
Power is good, while to film trepanning, being conducive to cultivation work, and the preparation method of the degradable Biodegradable mulch of energy.
The current mode for mostly using PBAT blendings or being prepared into masterbatch is applied to play degradation in plastics, wherein will
It is a kind of mode of simple economy that PBAT is prepared into masterbatch with calcium carbonate, has good market prospects, but due to preparation method
Or component selection is unreasonable, can reduce masterbatch performance, increases difficulty of processing, limits product applications.
Invention content
In order to solve above-mentioned the shortcomings of the prior art, a kind of biodegradable polyethylene mulch combination is provided
Object, the composition have good elongation percentage, mechanical strength and degradability, are conducive to mulch and are laid with and environmental protection use.
Another object of the present invention is to provide above-mentioned biodegradable polyethylene the preparation method of film composition.The party
The degradation masterbatch dosage that method uses is few, and method is simple, easy to operate, and degradation effect is apparent.
The purpose of the present invention is realized by following technical proposals：
A kind of biodegradable polyethylene ground film composition, based on parts by weight of raw materials, including low density polyethylene (LDPE)
(LDPE) 40~50 parts, 10~20 parts of 50~60 parts of linear low density polyethylene (LLDPE) and functional master batch；The functional master batch
Including 50~60 parts of PBAT, 40~50 parts of calcium carbonate, 5~10 parts of metallocene PE, 0.05~0.01 part of fluoroelastomer, idol
Join 4~7 parts of agent, 2~4 parts of dispersant, 8~10 parts of solvent.
Preferably, the grain size of the calcium carbonate is 800~1200 mesh.
Preferably, the coupling agent is silane coupling agent or aluminate coupling agent.
Preferably, the dispersant is polyethylene wax, stearic acid, stearic acid sodium, calcium stearate, stearmide or poly- second
One or more of glycol.
Preferably, the solvent is one or more of white oil, petroleum ether, machine oil or solvent naphtha.
Preferably, when it is 2.16kg to test counterbalance mass, the melt flow rate (MFR) of the low density polyethylene (LDPE) is 1.8
The density of~2.2g/10min, the low density polyethylene (LDPE) are 0.918~0.924g/cm3, the low density polyethylene (LDPE) exists
210 DEG C of oxidation induction time is 35~42min；When it is 2.16kg to test counterbalance mass, the metallocene PE
Melt flow rate (MFR) is 0.3~0.5g/10min, and the density of the metallocene PE is 0.918~0.921g/cm3。
Preferably, the preparation method of the functional master batch, includes the following steps：
S1. polyadipate/butylene terephthalate (PBAT) is ground：PBAT and mPE particles are ground, grinding temperature
Degree control is no more than 40 DEG C, and powder particles control is in 35~50 mesh after grinding；
S2. the processing of calcium carbonate：Coupling agent is added in solvent, it is stirred well to and is completely dissolved, by calcium carbonate plus
Enter to high-speed mixer, then coupling agent solution is added in calcium carbonate, it is straight to continue stirring by high-speed stirred again after stirring at low speed
Reach 110~120 DEG C to mixing machine；
S3. masterbatch is blended：PBAT after grinding is mixed with calcium carbonate in metallocene PE powder, dispersant and step S2
It closes；
S4. masterbatch is granulated：Uniformly mixed material is added in double screw extruder and melts, be plasticized, squeezing out, being granulated,
Obtain functional master batch.
Preferably, the rate of the stirring at low speed described in step S2 is 600~700 revs/min；The stirring at low speed when
Between be 2~3min；The rate of the high-speed stirred is 1800~2000 revs/min；The time of the high-speed stirred be 20~
23min；The time mixed described in step S3 is 3~4min；The screw slenderness ratio of double screw extruder described in step S4
It is 40~44：1, the prilling temperature in the double screw extruder is 155~160 DEG C.
Above-mentioned biodegradable polyethylene film composition preparation method, be by low density polyethylene (LDPE), linea low density
Polyethylene and functional master batch are blended, and after mixed on low speed again, mixed at high speed, mixing temperature is no more than 40 DEG C；By mixed composition
It is granulated to get biodegradable polyethylene film composition.
Preferably, the temperature of the granulation is 170~190 DEG C.
Each component cooperates in the present invention, enhances product performance jointly and operability.Wherein, since PBAT is easily viscous
It is attached to metal surface, is prepared in masterbatch and the later stage easily should be adhered to screw surface in the process, be present in product after degradable
Product properties is caused to decline.Metallocene PE is added in functional master batch can effectively reduce PBAT in the residual of metal surface and carry
High masterbatch performance；Calcium carbonate is precipitated calcium carbonate, and mesh number is then unfavorable for greatly product in 800-1200 mesh, calcium carbonate granule grain size
Can, it is too small, it should not disperse, performance can be caused unstable, calcium carbonate can preferably disperse, and improve product properties；Fluoroelastomer
(PPA) lubricity of PBAT and metal surface can be improved, reduce attachments of the PBAT in metal surface；Calcium carbonate can be improved in coupling agent
With the compatibility of PBAT；Dispersibility of the calcium carbonate in PBAT can be improved in dispersant；Solvent can dissolve coupling agent, improve
Treatment effect of the coupling agent to calcium carbonate.
Compared with prior art, the invention has the advantages that：
1. the biological degradation function masterbatch of the present invention has fine dispersion and self-cleaning, being added in polyethylene can ensure
Material effectively degrades, improves elongation at break, ensures the cleannes of production stability and product.
2. the biodegradable polyethylene of the present invention film composition there is good elongation percentage, mechanical strength and degradable
Property, while there is good self-cleaning in use, it is not easy to block mouth mold.
3. the preparation method that the present invention uses can be such that each component is sufficiently mixed uniformly, the effect of each component is effectively played, is protected
Demonstrate,proving composition has good degradation effect and comprehensive performance.
Specific implementation mode
The content further illustrated the present invention with reference to specific embodiment, but should not be construed as limiting the invention.
Unless otherwise specified, the conventional means that technological means used in embodiment is well known to those skilled in the art.Except non-specifically
Illustrate, reagent that the present invention uses, method and apparatus is the art conventional reagent, methods and apparatus.
The LDPE used in the embodiment of the present invention, the MFR when testing counterbalance mass and being 2.16kg is 1.8~2.2g/
10min, 0.918~0.924g/cm of density3, 1.9~2.3 (infrared spectrum S1378cm of the opposite degree of branching-1/S2019cm-1It calculates
It obtains)；MFR1.8~the 2.2g/10min, 0.918~0.924g/ of density of LLDPE when testing counterbalance mass and being 2.16kg
cm3.The fluoroelastomer (PPA) used is the 5920 of 3M companies or 5911.
The preparation of 1 functional master batch of embodiment
The grinding of 1.PBAT：50 parts of PBAT are ground together with 7 parts of metallocene PE (mPE) particles using grinder
Mill, grinding temperature control is no more than 40 DEG C, and powder particles control is in 35 mesh after grinding.Wherein the fusing point of PBAT is 128 DEG C,
MFR 5.1g/10min；The MFR 0.38g/10min of mPE, density 0.920g/cm3。
2. the processing of calcium carbonate：Coupling agent KH602 is added in white oil, it is stirred well to and is completely dissolved.First, will
45 part of 1000 mesh calcium carbonate is added to high-speed mixer, 700 revs/min of stirrings 3min, 1800 revs/min of stirring 20min；Secondly, by 5
Part silane coupling agent KH602 solution is added in calcium carbonate, continues stirring until mixing machine reaches 110 DEG C.
3. masterbatch is blended：PBAT after grinding is added to high speed with mPE powder, 2 parts of polyethylene waxes, 0.08 part of PPA5920
It in mixing machine, is mixed together with calcium carbonate, 1800 revs/min of mixing 3min.
4. masterbatch is granulated：Uniformly mixed material is added in 65 double screw extruders of ф and melts, be plasticized, squeezing out, making
Grain.Wherein, the draw ratio of screw rod is 44 in double screw extruder：1, there are 3 sections of cutouts, prilling temperature 155 in screw combinations
℃。
Functional master batch is added to by a certain percentage in the pellet of polyethylene drip irrigation zone, through high-speed mixer, (speed of agitator is
1800 revs/min, mixing time 3min) production is directly applied to after mixing.
The preparation of 2 functional master batch of embodiment
The grinding of 1.PBAT：55 parts of PBAT are ground together with 5 parts of mPE particles using grinder, grinding temperature control
System is no more than 40 DEG C, and powder particles control is in 40 mesh after grinding.
Wherein, the fusing point of PBAT is 129 DEG C, MFR 5.5g/10min；The MFR 0.5g/10min of mPE, density are
0.920g/cm3。
2. the processing of calcium carbonate：Coupling agent KH902 is added in white oil, it is stirred well to and is completely dissolved.
First, 40 part of 1000 mesh calcium carbonate is added to high-speed mixer, 600 revs/min of stirring 3min, 2000 revs/min are stirred
Mix 23min；Secondly, 4 parts of silane coupling agent solution are added in calcium carbonate, continue stirring until mixing machine reaches 110 DEG C.
3. masterbatch is blended：PBAT after grinding is added to high speed with mPE powder, 3 parts of polyethylene waxes, 0.01 part of PPA5920
It in mixing machine, is mixed together with calcium carbonate, 2000 revs/min of mixing 3min.
4. masterbatch is granulated：Uniformly mixed material is added in 65 double screw extruders of ф and melts, be plasticized, squeezing out, making
Grain.Wherein, the draw ratio of screw rod is 40 in double screw extruder：1, there are 2 sections of cutouts, prilling temperature 160 in screw combinations
℃。
Functional master batch is added to by a certain percentage in the pellet of polyethylene drip irrigation zone, through high-speed mixer, (speed of agitator is
1800 revs/min, mixing time 3min) production is directly applied to after mixing.
The preparation of 3 functional master batch of embodiment
The grinding of 1.PBAT：60 parts of PBAT are ground together with 10 parts of mPE particles using grinder, grinding temperature control
System is no more than 40 DEG C, and powder particles control is in 40 mesh after grinding.
Wherein, the fusing point of PBAT is 129 DEG C, MFR 5.5g/10min；The MFR 0.5g/10min of mPE, density are
0.920g/cm3。
2. the processing of calcium carbonate：Coupling agent KH902 is added in white oil, it is stirred well to and is completely dissolved.
First, 50 part of 1000 mesh calcium carbonate is added to high-speed mixer, 600 revs/min of stirring 3min, 2000 revs/min are stirred
Mix 23min；Secondly, 7 parts of silane coupling agent solution are added in calcium carbonate, continue stirring until mixing machine reaches 110 DEG C.
3. masterbatch is blended：PBAT after grinding is added to high speed with mPE powder, 4 parts of polyethylene waxes, 0.05 part of PPA5920
It in mixing machine, is mixed together with calcium carbonate, 2000 revs/min of mixing 3min.
4. masterbatch is granulated：Uniformly mixed material is added in 65 double screw extruders of ф and melts, be plasticized, squeezing out, making
Grain.Wherein, the draw ratio of screw rod is 40 in double screw extruder:1, there are 2 sections of cutouts, prilling temperature 160 in screw combinations
℃。
Functional master batch is added to by a certain percentage in the pellet of polyethylene drip irrigation zone, through high-speed mixer, (speed of agitator is
1800 revs/min, mixing time 3min) production is directly applied to after mixing.
Embodiment 4
A kind of biodegradable polyethylene film composition 1 include 40 parts of LDPE, 50 parts of LLDPE, made from embodiment 1
10 parts of functional master batch, wherein the MFR2.0g/10min of LDPE, density 0.920g/cm3, the opposite degree of branching 2.1；The MFR of LLDPE
For 1.9g/10min, density 0.919g/cm3, using 1- hexenes as comonomer.
Above-mentioned biodegradable polyethylene the preparation method of film composition be：By LLDPE, LDPE and functional master batch through height
Fast mixing machine is blended, and 600 revs/min mix 1 minute, and 1800 revs/min mix 2 minutes, and mixing temperature is no more than 40 DEG C；It will mix
Composition be granulated using twin-screw, the screw diameter of screw rod is 72mm in double screw extruder, screw rod in double screw extruder
Draw ratio be 44：1,170~190 DEG C of prilling temperature.
Embodiment 5
A kind of biodegradable polyethylene film composition 2 include 45 parts of LDPE, 50 parts of LLDPE, made from embodiment 2
12 parts of functional master batch, the wherein MFR of LDPE are 2.2g/10min, density 0.919g/cm3, the opposite degree of branching is 2.2；LLDPE
MFR1.9g/10min, density 0.921g/cm3, using 1- hexenes as comonomer.
Above-mentioned biodegradable polyethylene the preparation method of film composition be：By LLDPE, LDPE and functional master batch through height
Fast mixing machine is blended, and 700 revs/min mix 1 minute, and 2000 revs/min mix 2 minutes, and mixing temperature is no more than 40 DEG C；It will mix
Composition be granulated using twin-screw, the screw diameter of screw rod is 72mm in double screw extruder, screw rod in double screw extruder
Draw ratio be 44：1,170~190 DEG C of prilling temperature.
The performance of 1 present composition of table and its blown film
Table 1 be the biodegradable polyethylene of the present invention film composition and its blown film performance.It can from table 1
Know, preparing film, vertically and horizontally tearing strength, tensile strength and exercise elongation are still higher, and it is good to illustrate that the composition has
Mechanical strength.
Embodiment 6
A kind of biodegradable polyethylene film composition 3 include 50 parts of LDPE, 60 parts of LLDPE, made from embodiment 3
20 parts of functional master batch, the wherein MFR of LDPE are 2.2g/10min, density 0.919g/cm3, the opposite degree of branching is 2.2；LLDPE
MFR1.9g/10min, density 0.921g/cm3, using 1- hexenes as comonomer.
Above-mentioned biodegradable polyethylene the preparation method of film composition be：By LLDPE, LDPE and functional master batch through height
Fast mixing machine is blended, and 650 revs/min mix 1 minute, and 1800 revs/min mix 2 minutes, and mixing temperature is no more than 40 DEG C；It will mix
Composition be granulated using twin-screw, the screw diameter of screw rod is 72mm in double screw extruder, screw rod in double screw extruder
Draw ratio be 40：1,170~190 DEG C of prilling temperature.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by change, modification, substitute, combination and simplify,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (10)
1. a kind of biodegradable polyethylene ground film composition, which is characterized in that based on parts by weight of raw materials, including low-density is poly-
10~20 parts of 40~50 parts of ethylene, 50~60 parts of linear low density polyethylene and functional master batch；The functional master batch includes PBAT
50~60 parts, 40~50 parts of calcium carbonate, 5~10 parts of metallocene PE, 0.05~0.01 part of fluoroelastomer, coupling agent 4~7
Part, 2~4 parts of dispersant, 8~10 parts of solvent.
2. biodegradable polyethylene according to claim 1 ground film composition, which is characterized in that the calcium carbonate
Grain size is 800~1200 mesh.
3. biodegradable polyethylene according to claim 1 ground film composition, which is characterized in that the coupling agent is
Silane coupling agent or aluminate coupling agent.
4. biodegradable polyethylene according to claim 1 ground film composition, which is characterized in that the dispersant is
One or more of polyethylene wax, stearic acid, stearic acid sodium, calcium stearate, stearmide or polyethylene glycol.
5. biodegradable polyethylene according to claim 1 ground film composition, which is characterized in that the solvent is white
One or more of oil, petroleum ether, machine oil or solvent naphtha.
6. biodegradable polyethylene according to claim 1 ground film composition, which is characterized in that when test counterbalance mass
For 2.16kg when, the melt flow rate (MFR) of the low density polyethylene (LDPE) is 1.8~2.2g/10min, the low density polyethylene
The density of alkene is 0.918~0.924g/cm3, the low density polyethylene (LDPE) 210 DEG C of oxidation induction time be 35~
42min；When it is 2.16kg to test counterbalance mass, the melt flow rate (MFR) of the metallocene PE is 0.3~0.5g/
The density of 10min, the metallocene PE are 0.918~0.921g/cm3。
7. biodegradable polyethylene according to claim 1 ground film composition, which is characterized in that the functional master batch
Preparation method includes the following steps：
S1.PBAT is ground：PBAT and metallocene PE particle are ground, grinding temperature is controlled no more than 40 DEG C, is ground
Powder particles control is in 35~50 mesh after mill；
S2. the processing of calcium carbonate：Coupling agent is added in solvent, it is stirred well to and is completely dissolved, add calcium carbonate to
Coupling agent solution, is then added in calcium carbonate, continues stirring until mixed by high-speed mixer, high-speed stirred again after stirring at low speed
Conjunction machine reaches 110~120 DEG C；
S3. masterbatch is blended：PBAT after grinding is mixed with calcium carbonate in metallocene PE powder, dispersant and step S2；
S4. masterbatch is granulated：Uniformly mixed material is added in double screw extruder and melts, be plasticized, squeezing out, being granulated, is obtained
Functional master batch.
8. biodegradable polyethylene ground film composition according to claim 7, which is characterized in that low described in step S2
The rate of speed stirring is 600~700 revs/min；The time of the stirring at low speed is 2~3min；The speed of the high-speed stirred
Rate is 1800~2000 revs/min；The time of the high-speed stirred is 20~23min；The time mixed described in step S3 is 3
~4min；The screw slenderness ratio of double screw extruder described in step S4 is 40~44：1, in the double screw extruder
Prilling temperature be 155~160 DEG C.
9. according to any one of the claim 1-8 biodegradable polyethylenes the preparation method of film composition, feature exist
In, it is that low density polyethylene (LDPE), linear low density polyethylene and functional master batch are blended, after mixed on low speed again, mixed at high speed, mixing
Temperature is no more than 40 DEG C；Mixed composition is granulated to get biodegradable polyethylene film composition.
10. according to claim 9 biodegradable polyethylene film composition preparation method, which is characterized in that it is described
Granulation temperature be 170~190 DEG C.
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| CN112457550A (en) * | 2020-11-12 | 2021-03-09 | 仲恺农业工程学院 | Anti-condensation air-conditioning casting LDPE (Low-Density polyethylene)/POE (polyolefin elastomer)/PBAT (Poly Butt acrylate) composite film |
| CN113105726A (en) * | 2021-04-06 | 2021-07-13 | 贵州省材料产业技术研究院 | Preparation method of biodegradable biochar repair membrane material |
| CN114656714A (en) * | 2022-03-01 | 2022-06-24 | 山东清田塑工有限公司 | High-strength easily-recycled mulching film and preparation method thereof |
| CN115449146A (en) * | 2021-06-09 | 2022-12-09 | 中国石油化工股份有限公司 | Metallocene polyethylene film composition |
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| CN115449146A (en) * | 2021-06-09 | 2022-12-09 | 中国石油化工股份有限公司 | Metallocene polyethylene film composition |
| CN115449146B (en) * | 2021-06-09 | 2023-10-20 | 中国石油化工股份有限公司 | Metallocene polyethylene film composition |
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