CN112745556A - High-haze PE blown film extinction composition and preparation method and application thereof - Google Patents
High-haze PE blown film extinction composition and preparation method and application thereof Download PDFInfo
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- CN112745556A CN112745556A CN202011435879.4A CN202011435879A CN112745556A CN 112745556 A CN112745556 A CN 112745556A CN 202011435879 A CN202011435879 A CN 202011435879A CN 112745556 A CN112745556 A CN 112745556A
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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
-
- 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
-
- 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
-
- 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
- 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
-
- 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
-
- 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
Abstract
The invention provides a high haze PE blown film extinction composition, a preparation method and application thereof. The high haze PE blown film extinction composition comprises the following components in parts by weight: 50-70 parts of linear PE resin; 30-50 parts of HDPE; 0-10 parts of white inorganic master batch; 0.1-0.3 part of other processing aids; the HDPE has a melt index of 0.01-0.2 g/10min at 190 ℃ under 2.16kg, a number average molecular weight of 25000-60000 and a molecular weight distribution of 3-6. The high-haze PE blown film extinction composition achieves good haze and extinction effects by utilizing common linear PE resin, specially-selected HDPE and white inorganic master batches, the haze is even superior to that of foreign products, the cost is lower, the requirement on preparation equipment is low, and the composition can replace products of foreign companies.
Description
Technical Field
The invention relates to the technical field of high polymer materials, and particularly relates to a high-haze PE blown film extinction composition, and a preparation method and application thereof.
Background
The blown film is a common means of PE, the PE extinction film is used in many fields, a high-grade feeling is brought to people, and in addition, the soft PE extinction films can be used for agricultural films and have a light scattering effect. For the extinction material for the blown film, the bimodal LLDPE in northern Europe chemical industry is basically adopted as a raw material in the current market, the raw material supply of the film in the similar blown film aspect is mastered in the northern Europe chemical industry, and the northern Europe chemical industry carries out strict protection in the relevant material aspect, so that the market is monopolized in the northern Europe chemical industry all the time. In addition, the price of soft PE extinction films in northern Europe chemical industry is always high due to the shortage of supplies, so how to break through the technical blockade and provide a PE extinction film with lower cost has great significance to the market.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-haze PE blown film extinction composition which has excellent performance and can replace products of foreign companies.
The invention also aims to provide a preparation method of the high-haze PE blown film extinction composition.
The invention also aims to provide application of the high-haze PE blown film extinction composition.
The above purpose of the invention is realized by the following technical scheme:
the high-haze PE blown film extinction composition is characterized by comprising the following components in parts by weight:
the HDPE has a melt index of 0.01-0.2 g/10min at 190 ℃ under 2.16kg, a number average molecular weight of 25000-60000 and a molecular weight distribution of 3-6.
The inventors have found that by selecting a specific HDPE in combination with a linear PE, the flow difference between the two is utilized to provide a high haze effect on the surface of the film made from the composition. The HDPE has the characteristics of narrow molecular weight distribution and high molecular weight, and can well form flow difference with linear PE resin.
Preferably, the HDPE has a melt index of 0.03-0.1 g/10min at 190 ℃ under 2.16 kg.
Preferably, the HDPE has a number average molecular weight of 35000-55000.
Preferably, the molecular weight distribution of the HDPE is 4-5.5.
The linear PE resin is more affordable and available than other special PE materials.
Preferably, the linear PE resin is a linear PE resin synthesized by taking C4-C8 as a matrix. More preferably, the linear PE resin has a melt index of 0.5-3 g/10min at 190 ℃ under 2.16 kg.
In order to make inorganic powder have better dispersibility in plastics, the prior art adopts a method of mixing inorganic powder and plastics to prepare master batches. In the present invention, commercially available products can be used as the white inorganic master batch.
For better dispersibility of the inorganic powder in the plastic, the inorganic powder and the plastic are preferably mixed by a twin-screw extruder, and the aspect ratio of the screw is preferably 48:1 or more. The processing temperature is preferably 200 ℃ or higher at the time of mixing.
Further, the addition of the white inorganic master batch improves the bulk haze of the film made of the composition on the one hand, and has little influence on the transparency of the film on the other hand, so that the extinction effect of the whole film can be further improved.
Preferably, the addition amount of the white inorganic master batch is preferably 1-8 parts; more preferably 3 to 5 parts.
Preferably, the white inorganic master batch is formed by filling white inorganic powder with PE as a base material; the particle size D50 of the inorganic powder is 0.5-5 μm. Preferably, in the white inorganic master batch, the inorganic powder accounts for 40-90% of the mass of the white inorganic master batch.
Preferably, the melt index of the PE base material of the white inorganic master batch is preferably 2-10 g/10min at 190 ℃ under 2.16 kg.
Preferably, the PE base material of the white inorganic masterbatch is selected from LLDPE or HDPE.
The inorganic powder can be selected from common inorganic powder, as long as the color of the master batch formed by adding the inorganic powder into the master batch is white, and the inorganic powder can be selected from common inorganic powder such as barium sulfate, calcium carbonate and the like.
Most preferably, the inorganic powder is calcium carbonate.
Other processing aids may be those commonly used in the art. Preferably, the other processing aids are one or more of antioxidants and anti-aging agents.
The preparation method of the high-haze PE blown film extinction composition comprises the following steps: the components are subjected to melt blending extrusion by a double-screw extruder and are granulated to obtain the composite material.
The temperature of the melt blending extrusion is preferably 160-190 ℃.
Preferably, the twin-screw extruder has a screw length to diameter ratio of 36: 1-48: 1.
the application of the high-haze PE blown film extinction composition in preparing packaging materials.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a high-haze PE blown film extinction composition, which utilizes common linear PE resin, specially-selected HDPE and white inorganic master batches to achieve good haze and extinction effects, the haze is even superior to foreign products, the cost is lower, the requirement on preparation equipment is low, and the composition can replace products of foreign companies.
Detailed Description
The present invention will be described in further detail with reference to specific examples and comparative examples, but the present invention is not limited to the examples.
In the examples, the starting materials not specifically mentioned are all conventional commercial products.
Linear polyethylene resin LLDPE, available from Exxon Mobil (melt index at 190 ℃ C., 2.16kg at 2g/10 min);
HDPE1, available from the petrochemical group of China (HDPE 6097 melt index at 190 ℃, 2.16kg of 0.04g/10min, number average molecular weight 53820, molecular weight distribution 5.5);
HDPE2, available from the China petrochemical group (HDPE 5121B melt index at 190 deg.C, 2.16kg of 0.18g/10min, number average molecular weight 50132, molecular weight distribution 4.8);
HDPE3, available from the petrochemical group of China (HDPE 5502 melt index at 190 ℃, 2.16kg of 0.25g/10min, number average molecular weight 46820, molecular weight distribution 6.5);
HDPE4, available from the petrochemical group of China (HDPE 5000S melt index at 190 ℃, 2.16kg of 1g/10min, number average molecular weight 42180, molecular weight distribution 4.5);
white calcium carbonate masterbatch A, available from Chinfo technologies GmbH (PMB-PF701, melt index at 190 ℃, 8g/10min for 2.16 kg);
white calcium carbonate master batch B, self-made: taking LLDPE 7042 as a base material, filling 70% of calcium carbonate to form white inorganic master batch, and dispersing by using a twin screw with the length-diameter ratio of more than 48:1, wherein the processing temperature is more than 200 ℃. The particle size D50 of the selected calcium carbonate is 2 μm.
White barium sulfate master batch C, self-made: HDPE 8008 is used as a base material, and white inorganic master batches formed by filling 90% of barium sulfate are dispersed by using a double screw with the length-diameter ratio of more than 48:1, and the processing temperature is more than 200 ℃. The particle size D50 of the selected barium sulfate is 4 μm.
Antioxidants and anti-aging agents are commercially available.
Examples and comparative examples
The components are put into a high-speed mixer according to the formula shown in the table 1 and mixed, and are subjected to melt blending extrusion through a double-screw extruder with the length-diameter ratio of 40:1, wherein the temperature of a melting section is 160-190 ℃, and the high-haze blown film PE extinction composition is obtained.
In addition, as comparative example 4, the LLDPE and HDPE of example 2 were replaced with the same amount of northern european chemical LLDPE 2230.
Test example 1: melt flow Rate Performance and haze test
The melt flow rate properties of the materials were tested according to the method specified in GB/T3682-2018 determination of melt Mass Flow Rate (MFR) and melt volume flow rate (MVR) of thermoplastics.
The compositions of examples 1-10 and comparative examples 1-3 are added into a film blowing machine, the processing temperature is 170-220 ℃, the blowing ratio is 1: 1-1: 5, the thickness of a single-layer film is adjusted to be about 50um, the film sample is used for testing the performances including light transmittance, haze, surface gloss and the like, and the performance test is carried out according to the following standards. The light transmittance and haze were measured according to the methods specified in GB/T2410-. The surface gloss was measured from an angle of 60 ℃ according to the method specified in GB/T8807-1988, test methods for specular gloss in plastics. The test results are shown in table 2. Wherein the melt flow rate was measured at 190 ℃ under 2.16 kg.
From examples 1 to 8, the film material prepared from the high haze PE blown film extinction composition has the effects of high haze, light transmission and extinction. Examples 1 to 3 show that, even if the white inorganic master batch is not added, the performance of the high-haze PE blown film extinction composition is close to that of an LLDPE 2230 product, and the extinction performance is even better under the condition of large HDPE dosage, and after the white inorganic master batch is added, the extinction performance of the composition is easily adjusted to be consistent with that of the LLDPE 2230 product, and even part of the performance is better.
Compared with example 4 and example 3 and example 5, the haze and the extinction effect of the film material are further improved after the white inorganic master batch is added. As can be seen by comparing example 1 with comparative example 2, when the melt index of HDPE is too high, the haze of the material is reduced, the gloss is improved, the extinction effect of the film is reduced, and the practical application requirements cannot be met.
Claims (10)
1. The high-haze PE blown film extinction composition is characterized by comprising the following components in parts by weight:
the HDPE has a melt index of 0.01-0.2 g/10min at 190 ℃ under 2.16kg, a number average molecular weight of 25000-60000 and a molecular weight distribution of 3-6.
2. The high haze PE blown film matting composition according to claim 1 wherein the HDPE has a melt index of 0.03 to 0.1g/10min at 190 ℃ at 2.16 kg.
3. The high haze PE blown film extinction composition according to claim 1, wherein the HDPE has a number average molecular weight of 35000-50000.
4. The high haze PE blown film extinction composition according to claim 1, wherein the HDPE has a molecular weight distribution of 4 to 5.
5. The high haze PE blown film extinction composition according to claim 1, wherein the linear PE resin has a melt index of 0.5-3 g/10min at 190 ℃ under 2.16 kg.
6. The high haze PE blown film extinction composition according to claim 1, wherein the white inorganic master batch is formed by filling inorganic powder with LLDPE or HDPE as a base material; the particle size D50 of the inorganic powder is 0.5-5 μm.
7. The high haze PE blown film extinction composition of claim 6, wherein the inorganic powder is calcium carbonate or barium sulfate.
8. The preparation method of the high haze PE blown film extinction composition according to any one of claims 1 to 7, is characterized by comprising the following steps: the components are subjected to melt blending extrusion by a double-screw extruder and are granulated to obtain the composite material.
9. The method of claim 8, wherein the twin-screw extruder has a screw length to diameter ratio of 36: 1-48: 1.
10. use of the high haze PE blown film matting composition according to any one of claims 1 to 8 for the preparation of packaging materials.
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Citations (9)
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|---|---|---|---|---|
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| JP2016052784A (en) * | 2015-09-24 | 2016-04-14 | 大日本印刷株式会社 | Laminate of polyester resin composition |
| CN108263058A (en) * | 2016-12-30 | 2018-07-10 | 中国石油天然气股份有限公司 | A kind of BOPP matt films and preparation method thereof |
| CN108314818A (en) * | 2018-01-19 | 2018-07-24 | 四川厚诚新材料有限公司 | A kind of delustring curtain coating PE films and preparation method thereof |
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2020
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| JP2016052784A (en) * | 2015-09-24 | 2016-04-14 | 大日本印刷株式会社 | Laminate of polyester resin composition |
| CN108263058A (en) * | 2016-12-30 | 2018-07-10 | 中国石油天然气股份有限公司 | A kind of BOPP matt films and preparation method thereof |
| CN108314818A (en) * | 2018-01-19 | 2018-07-24 | 四川厚诚新材料有限公司 | A kind of delustring curtain coating PE films and preparation method thereof |
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| CN111361248A (en) * | 2020-02-24 | 2020-07-03 | 金发科技股份有限公司 | Extinction PE material and preparation method and application thereof |
| CN111923537A (en) * | 2020-10-14 | 2020-11-13 | 佛山新长盛塑料薄膜有限公司 | Matte forming film, preparation method thereof and matte packaging material |
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