CN107474351A - High-density polyethylene composition and preparation method thereof - Google Patents
High-density polyethylene composition and preparation method thereof Download PDFInfo
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- CN107474351A CN107474351A CN201610403554.5A CN201610403554A CN107474351A CN 107474351 A CN107474351 A CN 107474351A CN 201610403554 A CN201610403554 A CN 201610403554A CN 107474351 A CN107474351 A CN 107474351A
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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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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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
- 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
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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
- C08J2323/06—Polyethene
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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
- 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
- C08J2423/08—Copolymers of ethene
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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
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Abstract
The invention belongs to polythene material technical field, and in particular to a kind of high-density polyethylene composition and preparation method thereof.High-density polyethylene composition is made up of the raw material of following parts by weight：90 parts of HDPE resin, 10 parts of LLDPE resins, 0.15 1.25 parts of antioxidant, 0.25 1 parts of zinc stearate, 0.3 5 parts of inorganic opening agent, 0.01 0.5 parts of slipping agent, 0.1 3 parts of dissaving polymer.Dissaving polymer can replace a variety of auxiliary agents such as PPA, slipping agent, antistatic additive to use in the present invention, that is, simplify formula and technological process turn avoid some negative effects brought due to adding a variety of auxiliary agents to product；Preparation method technique is simple, and cost is cheap and material environment friendly, improves the smoothness and optical property of film.
Description
Technical field
The invention belongs to polythene material technical field, and in particular to a kind of high-density polyethylene composition and its preparation side
Method.
Background technology
Film prepared by high density polyethylene (HDPE) (HDPE) has the characteristics that toughness is high, printable, good airproof performance, is widely used in
Handbag, shopping bag, packaging bag etc. are made, for the benefit of use of density polyethylene film with high needs to improve its smoothness.
The influence factor of the smoothness of polyethylene film mostlys come from following two aspects：
First, in use, there is certain friction in film between film and film or between film and equipment,
Electrostatic is easily produced because of friction, can make film surface mill flower and tarnish, it is often more important that, packaging increasingly high speed, from
Dynamicization, big coefficient of friction cause the increase of film running resistance.At present, commonly use and add the method for antistatic additive and eliminate such shadow
It is loud, still, film surface can be caused to send out on the contrary if excessive velocities or mistake that antistatic additive migrates to film surface analyze
It is viscous, it can also influence film surface tinting strength, tinting power, optical property and sanitation performance.
Secondly, after Blown Film, film interlayer easily forms the closely sealed lower bonding of vacuum, it is difficult to separated；In addition, polyolefin
Film is during long-term storage, because the macromolecular chain between film interpenetrates and winds so that film firmly coheres
It is not readily separated together, has had a strong impact on the use of film.The method for solving this problem mainly has two kinds：First, in production film
When add a certain amount of inorganic opening agent and formed between film and raised prevent the generation of such adhesion phenomenon.It is but inorganic
Opening agent is typically opaque, and the increase of opening agent dosage can cause the optical property of polyethylene film to be deteriorated, and be unsuitable for
The production and processing of the film required to transparency and glossiness.Also, inorganic opening agent merges not in itself with polyvinyl resin
It is good, it is often necessary to which that adding coupling agent makes its good knitting；Second, a certain amount of slipping agent can also be added to reduce between film
Coefficient of friction, conventional slipping agent have organic derivatives such as erucyl amide, oleamide and ethylene bis stearamide etc., and it is acted on
Principle is that organic compound gradually moves to film surface from polyolefin internal, so as to form a tunic, improves the smooth of film
Property.But due to Film laminated is coiled and packaging production during, several slipping agents of above amount of precipitation inside and outside film roll
Uneven the widely different of coefficient of friction can be caused, so as to influence normal packaging production.
The Patent No. 200910116112.2 of China State Intellectual Property Office bulletin, a kind of entitled self-lubricating polyethylene
The patent of invention of film, its disclosed polyethylene film is using low density polyethylene (LDPE), LLDPE, metallocene linear
Low density polyethylene (LDPE), erucyl amide or its substituent, the shaping of auxiliary agent coextrusion film blowing.Although the invention can reduce the friction system of film
Number, but due to the organic matter that erucyl amide or its substituent are low molecule amount, its smooth effect is by smooth agent molecule to film
The migration on surface determines, due to Film laminated is coiled and packaging production during, this kind of slipping agent be inside and outside film roll
Amount of precipitation uneven can cause the widely different of coefficient of friction, so as to influence normal packaging production.
The Patent No. 201210593901.7 of China State Intellectual Property Office bulletin, entitled polyethylene are antistatic smooth
The patent of invention of color masterbatch and preparation method thereof, its disclosed polyethylene film are by hp-ldpe 15-25 parts, linearly
Low density polyethylene (LDPE) 20-35 parts, octene-ethylene polymer 30-70 parts, slipping agent 1-4 parts, defoamer 0.01-0.05 parts, wherein
Slipping agent is that all easily precipitation has undesirable effect the double oleamides of oleamide, erucyl amide or hexamethylene, and is added in this invention
Enter coupling agent to promote resin different with the present invention from the fusion of inorganic opening agent.
The Patent No. 200710021015.6 of China State Intellectual Property Office bulletin, it is entitled to be helped as PE Processing
The dissaving polymer of agent and the patent of invention of synthetic method, dissaving polymer therein are used merely as processing aid and this hair
Bright difference.
The content of the invention
It is an object of the invention to provide a kind of high-density polyethylene composition, the smooth performance and optics of film can be improved
Performance；It is scientific and reasonable, simple and easy invention also provides the preparation method of high-density polyethylene composition.
High-density polyethylene composition of the present invention, it is made up of the raw material of following parts by weight：
Described HDPE resin is ethene and the copolymer or ethene of 1- butylene and the copolymer of 1- hexenes, density are
0.948-0.960g/cm3, melt mass flow rate MFR (21.6Kg) is 10.5-11.5g/10min, weight average molecular weight 19-
210000, molecular weight distribution 21-25.
Described LLDPE resins are ethene and the copolymer or ethene of 1- butylene and the copolymer of 1- hexenes, density are
0.918-0.922g/cm3, melt mass flow rate MFR is 1.5-2.5g/10min.
Described antioxidant is the mixture of Hinered phenols antioxidant and phosphite ester kind antioxidant.
Described inorganic opening agent be calcium carbonate, magnesium carbonate, barium carbonate, calcium sulfate, magnesium sulfate, barium sulfate, aluminium hydroxide,
Magnesium hydroxide, calcium oxide, magnesia, titanium oxide, aluminum oxide, zinc oxide, talcum, clay, kaolin, silica, hydrotalcite, silicon
One or more in diatomaceous earth, bentonite, mica, zeolite, glass powder, sepiolite, flyash, rectorite or float stone.
Described slipping agent is the one or more in erucyl amide, oleamide or ethylene bis stearamide.
Described dissaving polymer is white arm polymer, and the polymer contains a polyethylene alkyl main chain portion
Point, the infrared spectrum of the polymer is in 3300cm-1—3400cm-1、1600cm-1—1680cm-1、1720cm-1—1760cm-1Have
Absworption peak.
The preparation method of high-density polyethylene composition of the present invention, step are as follows：
(1) inorganic opening agent and dissaving polymer are added in round-bottomed flask, are subsequently poured into n-hexane, water-bath or oil
Bath is heated to reflux and magnetic agitation, and solvent is removed with Rotary Evaporators, and remaining solid particle is placed on vacuum drying chamber drying, every
Take out stirring once within 10 minutes, obtained powder has a small amount of caking, and it is standby to obtain powder after ground crushing；
(2) powder added in LLDPE resin powders after slipping agent, antioxidant, zinc stearate and step (1) processing,
It is stirred in homogenizer, well mixed material is added in double screw extruder, melts, plastify, extrude, make
Grain, obtains LLDPE polyethylene master batches；
(3) LLDPE polyethylene master batches are added in HDPE resin, extruding pelletization, are produced.
The magnetic agitation time described in step (1) is 30-36 minutes.
Speed of agitator described in step (2) is 1600 revs/min, mixing time 15min, and whipping temp is 41 DEG C.
The screw slenderness ratio of double screw extruder described in step (2) is 35,220 DEG C of processing temperature.
Resin is when being processed into product, it is necessary to which process by high-temperature fusion, polyethylene is in high-temperature fusion by heat, oxygen etc.
Effect, it may occur that degraded or crosslinking so that structure changes so as to influence product properties, product is using process in addition
In by extraneous heat, oxygen effect also can recurring structure change influence to use, during avoiding resin processing and product use
The influence that the unfavorable factors such as heat, oxygen are brought in polymeric system, it is necessary to add antioxidant, and holding resin is to heat, the stabilization of oxygen
Property.Antioxidant is Hinered phenols antioxidant and phosphite ester kind antioxidant system, and both are with mass ratio 1:1 adds, common 0.15-
1.25 parts, preferably 0.2-0.5 parts.
Zinc stearate is commonly used for acid-acceptor, but can also play lubrication.When zinc stearate is uniformly assigned in polyethylene, add
Polymer starts to soften when work is heated, and zinc stearate molecule penetrates into the molecule interchain of polymer, weakens the phase between strand
Mutual attraction, and polymer is easier to slide and is rotated between strand in deformation.Zinc stearate dosage is 0.25-1 parts,
It is preferred that 0.3-0.5 parts.
Inorganic opening agent is calcium carbonate, magnesium carbonate, barium carbonate, calcium sulfate, magnesium sulfate, barium sulfate, aluminium hydroxide, hydroxide
Magnesium, calcium oxide, magnesia, titanium oxide, aluminum oxide, zinc oxide, talcum, clay, kaolin, silica, hydrotalcite, diatomite,
One or more in bentonite, mica, zeolite, glass powder, sepiolite, flyash, rectorite or float stone, dosage 0.3-
5 parts, preferably 1-1.5 parts.
Dissaving polymer is white arm polymer.It is characterized in that：(1) polymer must contain a long poly- second
Allylic alkylation backbone portion, there can be relatively good amalgamation with polyethylene.(2) infrared spectrum of the polymer is in 3300cm-1—
3400cm-1、1600cm-1—1680cm-1、1720cm-1—1760cm-1Have more obvious absworption peak, i.e., comprising amino and
Two important groups of ester group.Dosage is 0.1-3 parts, preferably 0.5-2 parts.Its typical IR collection of illustrative plates is shown in Fig. 1.
Slipping agent is the one or more in erucyl amide, oleamide or ethylene bis stearamide, and the present invention subtracts as far as possible
The dosage of few slipping agent, works as slipping agent：Dissaving polymer is 1:During 6-10, the smooth performance of the two collaboration increase film.It is refreshing
Lubrication prescription dosage is 0.01-0.5 parts, preferably 0.05-0.3 parts.
The present invention compared with prior art, has the advantages that：
(1) preparation method technique is simple, and cost is cheap and material environment friendly；
(2) smoothness and optical property of film are improved；
(3) dissaving polymer can replace a variety of auxiliary agents such as PPA, slipping agent, antistatic additive to use in the present invention, i.e., simple
Formula is changed and technological process turn avoid some negative effects brought due to adding a variety of auxiliary agents to product.
Brief description of the drawings
Fig. 1 is dissaving polymer typical IR collection of illustrative plates.
Embodiment
The present invention is described further with reference to embodiments.
Embodiment 1
Raw material composition is as follows：
Preparation method is as follows：
(1) talcum powder and dissaving polymer are added in round-bottomed flask, are subsequently poured into n-hexane, water-bath or oil bath add
Hot simultaneously magnetic agitation 30 minutes of flowing back, solvent is removed with Rotary Evaporators, remaining solid particle is placed on vacuum drying chamber drying, often
Stirring was taken out every 10 minutes once, and obtained powder has a small amount of caking, standby after ground crushing.
(2) in LLDPE powder resins, the powder after antioxidant, oleamide, zinc stearate and step (1) are handled is added
End.Mixed in homogenizer, 1600 revs/min, mixing time 15min of speed of agitator, 41 DEG C of whipping temp；Will be well mixed
Material be added in double screw extruder, melting, plasticizing, extrusion, be granulated, obtain LLDPE polyethylene master batches.Screw slenderness ratio
For 35,220 DEG C of processing temperature.
(3) LLDPE polyethylene master batches are added in HDPE resin, the composition of embodiment 1 is made after granulation.
Embodiment 2
Raw material composition is as follows：
Preparation method is the same as embodiment 1, the composition of obtained embodiment 2.
Embodiment 3
Raw material composition is as follows：
Preparation method is the same as embodiment 1, the composition of obtained embodiment 3.
Embodiment 4
Raw material composition is as follows：
Preparation method is the same as embodiment 1, the composition of obtained embodiment 4.
Comparative example 1
Raw material composition is as follows：
Preparation method is as follows：
(1) talcum powder is added in round-bottomed flask, is subsequently poured into n-hexane, water-bath or oil bath heating backflow and magnetic force stirs
Mix 30 minutes, remove solvent with Rotary Evaporators, remaining solid particle is placed on vacuum drying chamber drying, took out and stirs every 10 minutes
Mix the powder once, obtained and have a small amount of caking, it is standby after ground crushing.
(2) in LLDPE powder resins, the powder after antioxidant, oleamide, zinc stearate and step (1) are handled is added
End.Mixed in homogenizer, 1600 revs/min, mixing time 15min of speed of agitator, 41 DEG C of whipping temp；Will be well mixed
Material be added in double screw extruder, melting, plasticizing, extrusion, be granulated, obtain LLDPE polyethylene master batches.Screw slenderness ratio
For 35,220 DEG C of processing temperature.
(3) LLDPE polyethylene master batches are added in HDPE resin, the composition of comparative example 1 is made after granulation.
Comparative example 2
Raw material composition is as follows：
Preparation method is with comparative example 1, the composition of obtained comparative example 2 after granulation.
Comparative example 3
Raw material composition is as follows：
Preparation method is with embodiment 1, the composition of obtained comparative example 3 after granulation.
Comparative example 4
Raw material composition is as follows：
Preparation method is with embodiment 1, the composition of obtained comparative example 4 after granulation.
Comparative example 5
Raw material composition is as follows：
Preparation method is with embodiment 1, the composition of obtained comparative example 5 after granulation.
Comparative example 6
Raw material composition is as follows：
Preparation method is as follows：
(1) in LLDPE powder resins, antioxidant, zinc stearate, talcum powder and dissaving polymer are added in high-speed stirring
Mix and 5-10min is mixed in machine, well mixed material is added in double screw extruder, melting, plasticizing, extrusion, granulation, i.e.,
LLDPE polyethylene master batches are made.
(2) LLDPE polyethylene master batches are added in HDPE resin, the composition of comparative example 6 is made after granulation.
Comparative example 7
Raw material composition is as follows：
Preparation method is with embodiment 1, the composition of obtained comparative example 7 after granulation.
Comparative example 8
Raw material composition is as follows：
Preparation method is with embodiment 1, the composition of obtained comparative example 8 after granulation.
The composition of embodiment and comparative example is blow molded into 30 μm of film, and optical performance test is shown in Table 1, and film smoothness is shown in
Table 2, film tensile strength are shown in Table 3.
Table 1 prepares Film Optics performance
| Sample | Mist degree, % |
| Embodiment 1 | 83.1 |
| Embodiment 2 | 81.9 |
| Embodiment 3 | 82.6 |
| Embodiment 4 | 83.6 |
| Comparative example 1 | 86.6 |
| Comparative example 2 | 86.4 |
| Comparative example 3 | 86.5 |
| Comparative example 4 | 84.6 |
| Comparative example 5 | 86.7 |
| Comparative example 6 | 86.3 |
| Comparative example 7 | 89.0 |
| Comparative example 8 | 82.1 |
The film smoothness of table 2
Table 3 prepares film tensile strength
It can be seen that from embodiment and comparative example：
1st, by embodiment and comparative example can be seen that slipping agent and dissaving polymer synergy can greatly improve it is thin
The smooth performance of film.
2nd, in comparative example 3 dissaving polymer without amino 3300cm-1—3400cm-1、1600cm-1—1680cm-1Absorb
Peak, without 1720cm in comparative example 4-1—1760cm-1Dissaving polymer used is without long aliphatic chain in absworption peak, comparative example 5,
Have a significant impact to the optical property of obtained film.
3rd, when dissaving polymer adds within the scope of the present invention, as the increase tensile strength of addition changes less,
It can cause film tensile strength and Film Haze degradation during excessive addition.
Claims (10)
1. a kind of high-density polyethylene composition, it is characterised in that be made up of the raw material of following parts by weight：
2. high-density polyethylene composition according to claim 1, it is characterised in that described HDPE resin be ethene and
The copolymer or ethene of 1- butylene and the copolymer of 1- hexenes, density 0.948-0.960g/cm3, melt mass flow rate
MFR is 10.5-11.5g/10min, weight average molecular weight 19-21 ten thousand, molecular weight distribution 21-25.
3. high-density polyethylene composition according to claim 1, it is characterised in that described LLDPE resins be ethene and
The copolymer or ethene of 1- butylene and the copolymer of 1- hexenes, density 0.918-0.922g/cm3, melt mass flow rate
MFR is 1.5-2.5g/10min.
4. high-density polyethylene composition according to claim 1, it is characterised in that described antioxidant is Hinered phenols
The mixture of antioxidant and phosphite ester kind antioxidant.
5. high-density polyethylene composition according to claim 1, it is characterised in that described inorganic opening agent is carbonic acid
Calcium, magnesium carbonate, barium carbonate, calcium sulfate, magnesium sulfate, barium sulfate, aluminium hydroxide, magnesium hydroxide, calcium oxide, magnesia, titanium oxide,
Aluminum oxide, zinc oxide, talcum, clay, kaolin, silica, hydrotalcite, diatomite, bentonite, mica, zeolite, glass dust
One or more in end, sepiolite, flyash, rectorite or float stone.
6. high-density polyethylene composition according to claim 1, it is characterised in that described slipping agent be erucyl amide,
One or more in oleamide or ethylene bis stearamide.
7. high-density polyethylene composition according to claim 1, it is characterised in that described dissaving polymer is white
Color arm polymer, the polymer contain a polyethylene alkyl backbone portion, and the infrared spectrum of the polymer is in 3300cm-1—
3400cm-1、1600cm-1—1680cm-1、1720cm-1—1760cm-1There is absworption peak.
8. the preparation method of any described high-density polyethylene compositions of a kind of claim 1-7, it is characterised in that step is such as
Under：
(1) inorganic opening agent and dissaving polymer are added in round-bottomed flask, are subsequently poured into n-hexane, water-bath or oil bath add
Heat backflow and magnetic agitation, solvent is removed with Rotary Evaporators, remaining solid particle is placed on vacuum drying chamber drying, every 10 points
Clock takes out stirring once, and obtained powder has a small amount of caking, and it is standby to obtain powder after ground crushing；
(2) powder added in LLDPE resin powders after slipping agent, antioxidant, zinc stearate and step (1) processing, in height
It is stirred in fast mixer, well mixed material is added in double screw extruder, melting, plasticizing, extrusion, granulation,
Obtain LLDPE polyethylene master batches；
(3) LLDPE polyethylene master batches are added in HDPE resin, extruding pelletization, are produced.
9. the preparation method of high-density polyethylene composition according to claim 8, it is characterised in that described in step (1)
The magnetic agitation time be 30-36 minutes.
10. the preparation method of high-density polyethylene composition according to claim 8, it is characterised in that institute in step (2)
The speed of agitator stated is 1600 revs/min, mixing time 15min, and whipping temp is 41 DEG C.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109836667A (en) * | 2019-02-21 | 2019-06-04 | 锦州英诺威科技服务有限公司 | A kind of manufacture craft of polyethylene opening agent masterbatch composition |
| CN110724333A (en) * | 2018-07-16 | 2020-01-24 | 中国石油化工股份有限公司 | Linear low-density polyethylene additive master batch, preparation method and application thereof |
| CN110982152A (en) * | 2019-12-22 | 2020-04-10 | 昆山禾振瑞新复合材料有限公司 | High-performance extinction master batch and extinction film prepared from same |
| CN111572139A (en) * | 2020-05-27 | 2020-08-25 | 浙江和顺新材料有限公司 | Colorful high-brightness high-transmittance antibacterial polyester film for packaging printing and preparation method thereof |
| CN112080042A (en) * | 2019-06-12 | 2020-12-15 | 中国石油化工股份有限公司 | Auxiliary agent composition and preparation method thereof, linear low-density polyethylene composition and preparation method thereof, and polyethylene casting packaging film |
| CN112442228A (en) * | 2019-08-28 | 2021-03-05 | 中国石油化工股份有限公司 | Polyethylene composition with good shrinkage and preparation method thereof |
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