CN112694675A - Semi-dull master batch and preparation method thereof - Google Patents
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- 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
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Abstract
The invention discloses a semi-dull master batch which comprises the following components in parts by weight: 85-90 parts of ternary copolymer polypropylene, 24-28 parts of high-density polyethylene, 0.3-0.5 part of zinc stearate, 0.01-0.02 part of nano magnesium oxide and 0.2-0.5 part of solubilizer. The preparation method of the semi-dull master batch comprises the following steps: and (2) burdening, namely putting all the raw materials into a mixer to be mixed for 10-15min, melting and extruding the raw materials into strips through a double-screw extruder and a filter, quickly cooling in a water bath, drying, then carrying out grain cutting and impurity separation, sucking into a charging bucket, carrying out secondary drying in the charging bucket to prepare a finished particle product, and filling into an isolated plastic bag to obtain the semi-dull master batch. The semi-dull film prepared by the semi-dull master batch has good dispersibility and improves the production stability.
Description
Technical Field
The invention relates to the field of semi-dull master batches, in particular to a semi-dull master batch and a preparation method thereof.
Background
Since the development of biaxially oriented polypropylene films (BOPP films) in the last century, the biaxially oriented polypropylene films are widely applied to production and life of people due to the characteristics of high yield, good product performance and the like. The extinction film is used as a type of BOPP film, the yield and the performance of products are continuously improved, and the extinction material is used as the most important functional raw material of the extinction film and directly influences the appearance touch feeling of the film. Currently, the haze of the existing extinction film on the market is basically more than 70, which is called as a full extinction film, and the extinction film with the haze lower than 60 (generally called as a semi-extinction film) has less customer and demand, so that the development of the semi-extinction material is lagged, and the performance of the semi-extinction material is poor. However, with the increasing development of the future market, people's demand for semi-matte films is necessarily increased, and the prior semi-matte master batches mostly adopt binary random polypropylene copolymers or ternary random polypropylene copolymers. Compared with binary polypropylene copolymer, the performances of the ternary random copolymerization polypropylene such as heat sealing temperature, transparency and the like are better than those of binary random copolymerization, the requirements of film uniformity and the like can be better met, but the production stability is slightly poor, and the roll sticking phenomenon of the film in the longitudinal stretching process is easy to occur. Compared with ternary polypropylene copolymer, the semi-dull master batch prepared from the binary polypropylene copolymer has poor dispersibility and good stability. At present, no semi-dull master batch with good performance exists in the market, and the development of the plate dull film is greatly influenced.
Disclosure of Invention
The invention aims to provide a semi-dull master batch and a preparation method thereof, and a semi-dull film prepared from the semi-dull master batch has good dispersibility and improved production stability.
In order to achieve the purpose, the invention provides the following technical scheme:
a semi-dull master batch comprises the following components in parts by weight: 85-90 parts of ternary copolymer polypropylene, 24-28 parts of high-density polyethylene, 0.3-0.5 part of zinc stearate, 0.01-0.02 part of nano magnesium oxide and 0.2-0.5 part of solubilizer.
Preferably, the melt index of the terpolymer polypropylene is 6-10g/10 min.
Preferably, the high density polyethylene has a melt index of 0.15 to 0.40g/10 min.
Preferably, the compatibilizer is linear low density polyethylene having a melt index of 22.0 to 28.0g/10 min.
Preferably, the preparation method of the semi-dull master batch comprises the following steps: and (2) burdening, namely putting all the raw materials into a mixer to be mixed for 10-15min, melting and extruding the raw materials into strips through a double-screw extruder and a filter, quickly cooling in a water bath, drying, then carrying out grain cutting and impurity separation, sucking into a charging bucket, carrying out secondary drying in the charging bucket to prepare a finished particle product, and filling into an isolated plastic bag to obtain the semi-dull master batch.
Preferably, the burdening specifically comprises the following steps of stabilizing the temperature of a holding furnace at 40-50 ℃, then sequentially putting the ternary copolymer polypropylene, the zinc stearate and the nano magnesium oxide into the holding furnace, uniformly mixing the raw materials in the holding furnace by using a stirring device, taking out the mixed raw materials in the holding furnace after 30-45min, rapidly drying the mixed raw materials for later use, and simultaneously preparing the high-density polyethylene and the solubilizer for later use.
Preferably, the stirring speed of the stirring device is 200-230 r/min.
Preferably, the temperature of the extruder is gradually controlled from 210 ℃ to 170 ℃ for extruding, and the extrusion quality is controlled at 300 kilograms per hour according to the configuration of the extruder.
Compared with the prior art, the invention has the beneficial effects that:
1) the semi-dull master batch prepared by the invention is used for a dull layer of a BOPP film, and the prepared BOPP film has uniform surface roughness, uniform haze distribution and stable dull effect;
2) by compounding the ternary copolymer polypropylene, the zinc stearate and the nano magnesium oxide, the roll sticking phenomenon of the film in the longitudinal stretching process can not occur, the production stability is improved, and the performance of the film is not influenced.
Drawings
FIG. 1 is an electron microscopy scanning picture of a sample of a semi-matte film of the present invention prepared using example 2;
FIG. 2 is an electron microscopy scanning picture of a sample of a semi-matte film of the present invention prepared using comparative example 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A semi-dull master batch comprises the following components in parts by weight: 85 parts of ternary copolymer polypropylene, 24 parts of high-density polyethylene, 0.3 part of zinc stearate, 0.01 part of nano magnesium oxide and 0.2 part of solubilizer; the melt index of the ternary copolymer polypropylene is 6g/10 min; the high density polyethylene has a melt index of 0.15g/10 min; the compatibilizer is linear low density polyethylene, and the melt index of the linear low density polyethylene is 22.0g/10 min.
The preparation method of the semi-dull master batch comprises the following steps: stabilizing the temperature of a heat preservation furnace at 40 ℃, then sequentially placing the ternary copolymer polypropylene, zinc stearate and nano magnesium oxide into the heat preservation furnace, uniformly mixing the raw materials in the heat preservation furnace by using a stirring device, taking out the mixed raw materials in the heat preservation furnace after 30min, rapidly drying the mixed raw materials for later use, simultaneously preparing high-density polyethylene and a solubilizer for later use, placing the mixed raw materials, the high-density polyethylene and the solubilizer into a mixer for mixing for 10-15min, melting and extruding the raw materials into strips through a double-screw extruder and a filter, rapidly cooling in a water bath, drying, further carrying out granulation and impurity separation, sucking into a charging bucket, carrying out secondary drying in the charging bucket to prepare a granular finished product, and filling into an isolated plastic bag to obtain the semi-extinction master batch. The temperature of the extruder is gradually controlled from 210 ℃ to 170 ℃ for extruding, and the extrusion quality is controlled at 300 kg per hour according to the configuration of the extruder.
Example 2
A semi-dull master batch comprises the following components in parts by weight: 87 parts of ternary copolymer polypropylene, 26 parts of high-density polyethylene, 0.4 part of zinc stearate, 0.015 part of nano magnesium oxide and 0.3 part of solubilizer; the melt index of the ternary copolymer polypropylene is 8g/10 min; the high density polyethylene has a melt index of 0.30g/10 min; the compatibilizer is linear low density polyethylene, and the melt index of the linear low density polyethylene is 25.0g/10 min.
The preparation method of the semi-dull master batch comprises the following steps: stabilizing the temperature of a heat preservation furnace at 45 ℃, then sequentially placing the ternary copolymer polypropylene, zinc stearate and nano magnesium oxide into the heat preservation furnace, uniformly mixing the raw materials in the heat preservation furnace by using a stirring device, wherein the stirring speed of the stirring device is 215r/min, taking out the mixed raw materials in the heat preservation furnace after 38min, rapidly drying the mixed raw materials for later use, simultaneously preparing high-density polyethylene and a solubilizer for later use, placing the mixed raw materials, the high-density polyethylene and the solubilizer into a mixer for mixing for 13min, melting and extruding the raw materials into strips through a double-screw extruder and a filter, rapidly cooling in a water bath, drying, then carrying out grain cutting and impurity separation, sucking into a material tank, carrying out secondary drying in the material tank to prepare a granular finished product, and putting into an isolated plastic bag to obtain the semi-dull master batch. The temperature of the extruder is gradually controlled from 210 ℃ to 170 ℃ for extruding, and the extrusion quality is controlled at 300 kg per hour according to the configuration of the extruder.
Example 3
A semi-dull master batch comprises the following components in parts by weight: 90 parts of ternary copolymer polypropylene, 28 parts of high-density polyethylene, 0.5 part of zinc stearate, 0.02 part of nano magnesium oxide and 0.5 part of solubilizer; the melt index of the ternary copolymer polypropylene is 10g/10 min; the high density polyethylene has a melt index of 0.40g/10 min; the compatibilizer is linear low density polyethylene, and the melt index of the linear low density polyethylene is 28.0g/10 min.
The preparation method of the semi-dull master batch comprises the following steps: stabilizing the temperature of a heat preservation furnace at 50 ℃, then sequentially placing the ternary copolymer polypropylene, zinc stearate and nano magnesium oxide into the heat preservation furnace, uniformly mixing the raw materials in the heat preservation furnace by using a stirring device, taking out the mixed raw materials in the heat preservation furnace after 45min, rapidly drying the mixed raw materials for later use, simultaneously preparing high-density polyethylene and a solubilizer for later use, placing the mixed raw materials, the high-density polyethylene and the solubilizer into a mixer for mixing for 15min, melting and extruding the raw materials into strips through a double-screw extruder and a filter, rapidly cooling in a water bath, drying, then carrying out grain cutting and impurity separation, sucking into a material tank, carrying out secondary drying in the material tank to prepare a granular finished product, and putting into an isolated plastic bag to obtain the semi-dull master batch. The temperature of the extruder is gradually controlled from 210 ℃ to 170 ℃ for extruding, and the extrusion quality is controlled at 300 kg per hour according to the configuration of the extruder.
Comparative example 1
This comparative example differs from example 2 in that: a semi-dull master batch comprises the following components in parts by weight: 87.415 parts of ternary copolymer polypropylene, 26 parts of high-density polyethylene and 0.3 part of solubilizer.
Comparative example 2
This comparative example differs from example 2 in that: a semi-dull master batch comprises the following components in parts by weight: 87 parts of ternary copolymer polypropylene, 26 parts of high-density polyethylene, 0.415 part of zinc stearate and 0.3 part of solubilizer;
comparative example 3
This comparative example differs from example 2 in that: a semi-dull master batch comprises the following components in parts by weight: 87 parts of ternary copolymer polypropylene, 26 parts of high-density polyethylene, 0.415 part of nano magnesium oxide and 0.3 part of solubilizer;
comparative example 4
This comparative example differs from example 2 in that: a semi-dull master batch comprises the following components in parts by weight: 87.415 parts of binary copolymer polypropylene, 26 parts of high-density polyethylene and 0.3 part of solubilizer.
The four semi-dull master batches prepared in the above examples 1 to 3 and comparative examples 1 to 4 were used in a 100% ratio in the dull layer of the BOPP film, using polypropylene as the main raw material for the core layer and the lower surface layer, and the rotating speed and temperature of the three extruders were adjusted to control the thickness and speed of the film production. The upper surface layer material, the core layer material and the lower surface layer material are extruded together through a die head, then sheet casting, longitudinal stretching, transverse stretching, traction and rolling are carried out, and finally, a product with a certain specification is cut by a splitting machine. A semi-matte film having a film thickness of 22 μm and a semi-matte layer thickness of 2.0 μm was produced.
And (3) thickness detection: the thickness gauge used was Millimar1240(MahrGmbH Mark) with reference to the test standard GB/T10003-2008;
haze detection: the HaZe meter adopts German BYK-Gardner, model HaZe-gar, and the detection standard is GB/T2410-2008.
And (3) roughness detection: the method adopts a MarSurf M300C coarseness tester of German Mark company, and the reference test standard is GB/T13542.2-2009/8.
Secondly, whether the film is stuck to a roll or not during the longitudinal stretching process is observed.
And (3) carrying out performance detection on the prepared semi-matt film, wherein the detection result is as follows:
table 1 semi-matt film performance test results table for performance test
As can be seen from table 1, the semi-matte master batch prepared by the method is used as a matte layer of a semi-matte film for production, and the prepared semi-matte film has smaller standard deviation of thickness, roughness and haze, which indicates that the prepared semi-matte film has more uniform surface roughness, more uniform haze distribution and more stable matte effect.
Scanning with an electron microscope was performed on the semi-matte films prepared in example 2 and comparative example 4 to obtain the scanning pictures of fig. 1-2, from which it is apparent that the overall distribution of example 2 is more uniform than comparative example 4.
Further, whether or not the semi-matte films prepared in examples 1 to 3 and comparative examples 1 to 4 exhibited the roll-sticking phenomenon during the film stretching in the machine direction was observed, and the results are shown in the following table:
TABLE 2 roll sticking phenomenon of semi-matte films during longitudinal stretching
| Contrast item | Whether roll sticking phenomenon occurs in the longitudinal stretching process |
| Example 1 | The roller sticking phenomenon does not occur |
| Example 2 | The roller sticking phenomenon does not occur |
| Example 3 | The roller sticking phenomenon does not occur |
| Comparative example 1 | The roller sticking phenomenon occurs |
| Comparative example 2 | Slight roller sticking phenomenon appears |
| Comparative example 3 | Slight roller sticking phenomenon appears |
| Comparative example 4 | The roller sticking phenomenon does not occur |
As can be seen from Table 2, the roller sticking phenomenon in the longitudinal stretching process can be avoided by adding zinc stearate and nano magnesium oxide, and the production stability is improved.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.
Claims (8)
1. The semi-dull master batch is characterized by comprising the following components in parts by weight: 85-90 parts of ternary copolymer polypropylene, 24-28 parts of high-density polyethylene, 0.3-0.5 part of zinc stearate, 0.01-0.02 part of nano magnesium oxide and 0.2-0.5 part of solubilizer.
2. A semi-matt master batch according to claim 1, wherein: the melt index of the ternary copolymerized polypropylene is 6-10g/10 min.
3. A semi-matt master batch according to claim 1, wherein: the high density polyethylene has a melt index of 0.15 to 0.40g/10 min.
4. A semi-matt master batch according to claim 1, wherein: the compatibilizer is linear low density polyethylene, and the melt index of the linear low density polyethylene is 22.0-28.0g/10 min.
5. A process for the preparation of a semi-matt masterbatch according to any one of claims 1 to 4 comprising the steps of: and (2) burdening, namely putting all the raw materials into a mixer to be mixed for 10-15min, melting and extruding the raw materials into strips through a double-screw extruder and a filter, quickly cooling in a water bath, drying, then carrying out grain cutting and impurity separation, sucking into a charging bucket, carrying out secondary drying in the charging bucket to prepare a finished particle product, and filling into an isolated plastic bag to obtain the semi-dull master batch.
6. A process for preparing a semi-matt masterbatch according to claim 5 wherein: stabilizing the temperature of a heat preservation furnace at 40-50 ℃, then sequentially putting the ternary polymerization polypropylene, the zinc stearate and the nano magnesium oxide into the heat preservation furnace, uniformly mixing the raw materials in the heat preservation furnace by using a stirring device, taking out the mixed raw materials in the heat preservation furnace after 30-45min, rapidly drying the mixed raw materials for later use, and simultaneously preparing the high-density polyethylene and the solubilizer for later use.
7. The method for preparing a semi-matte master batch according to claim 6, wherein: the stirring speed of the stirring device is 200-230 r/min.
8. A process for preparing a semi-matt masterbatch according to claim 5 wherein: the temperature of the extruder is gradually controlled from 210 ℃ to 170 ℃ for extruding, and the extrusion quality is controlled at 300 kg per hour according to the configuration of the extruder.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103497422A (en) * | 2013-09-16 | 2014-01-08 | 苏州康斯坦普工程塑料有限公司 | Matting master batch for biaxially oriented polypropylene film and production process of matting master batch |
| CN105128472A (en) * | 2015-08-31 | 2015-12-09 | 山东泗水康得新复合材料有限公司 | Matte BOPP film and preparation method thereof |
| CN107603008A (en) * | 2017-08-25 | 2018-01-19 | 江苏精良高分子材料有限公司 | A kind of semi-dull material for BOPP semi-dull transfer basement membranes and its preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103497422A (en) * | 2013-09-16 | 2014-01-08 | 苏州康斯坦普工程塑料有限公司 | Matting master batch for biaxially oriented polypropylene film and production process of matting master batch |
| CN105128472A (en) * | 2015-08-31 | 2015-12-09 | 山东泗水康得新复合材料有限公司 | Matte BOPP film and preparation method thereof |
| CN107603008A (en) * | 2017-08-25 | 2018-01-19 | 江苏精良高分子材料有限公司 | A kind of semi-dull material for BOPP semi-dull transfer basement membranes and its preparation method and application |
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Application publication date: 20210423 |