CN111909435A - Extinction material for BOPP film - Google Patents
Extinction material for BOPP film Download PDFInfo
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- CN111909435A CN111909435A CN202010831958.0A CN202010831958A CN111909435A CN 111909435 A CN111909435 A CN 111909435A CN 202010831958 A CN202010831958 A CN 202010831958A CN 111909435 A CN111909435 A CN 111909435A
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- bopp film
- resin
- processing aid
- atactic polypropylene
- bopp
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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
- C08J2323/06—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
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/14—Copolymers of propene
-
- 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
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/14—Copolymers of propene
-
- 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
- C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
-
- 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
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
- C08J2491/06—Waxes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a matting material for a BOPP film, which is characterized by being prepared from the following raw materials in parts by weight: 40-70%, PP resin: 20-50%, compatibilized flow modifier: 1-8%, processing aid: 1 to 5 percent; the compatibilized flow modifier is an atactic polypropylene comb-block polyolefin comprised of a polyolefin backbone and at least two atactic polypropylene combs pendant from the polyolefin backbone having a weight average molecular weight of at least 8000g/mol and a crystallinity of less than 20%; the processing aid is Fischer-Tropsch wax. The extinction material provided by the invention has the characteristic of higher fluidity, and after the BOPP film is prepared, the heat sealing temperature is low, and the weather resistance and durability are good.
Description
Technical Field
The invention relates to the technical field of polymer composite materials, in particular to a matting material for a BOPP film.
Background
The biaxially oriented polypropylene film is called BOPP film for short, wherein the BOPP extinction film is the most common high-grade packaging film. In the production process of the BOPP extinction film, 100% of extinction material needs to be added to the surface layer of the co-extruded film, and the surface of the film is coarsened after biaxial stretching, so that the film has a diffuse reflection effect on light and plays an extinction (matte) effect. When the BOPP matt film is used for packaging products, a soft, fashionable and elegant high-grade feeling can be brought to people, and meanwhile, eye fatigue can be eliminated, so that the BOPP matt film is more and more widely applied to the field of packaging, and more requirements on heat sealing temperature and weather resistance are provided.
At present, extinction materials used by extinction films at home and abroad are blends of polyolefin, and the extinction films produced by the extinction materials have good film surface quality and moderate haze. However, the design capability of the surface layer extrusion equipment of many BOPP manufacturers is limited at present, it is difficult to ensure the thickness of the surface layer of the matte layer at a high speed (generally, the thickness is required to be more than 2.3 micrometers, so that proper haze can be ensured), and the thickness of the matte layer can only be ensured by reducing the production speed, so that the production cost of the film is inevitably increased by reducing the production speed, and the market competitiveness of the matte film is reduced. In order to improve the production efficiency, in the prior art, the fluidity is generally improved by selecting a PP resin with a higher melt index or by adding peroxide, as described in the Chinese patent application with publication No. CN 107189168A. However, the effect of the existing improved technologies is still not ideal, and the MFR is only improved to 3.5-4.5g/10mm from 1.5-2.5g/10mm in the traditional technology.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a polishing material which has higher fluidity, low heat sealing temperature after film forming and good weather resistance and durability.
In order to achieve the purpose, the invention adopts the following technical scheme.
The extinction material for the BOPP film is characterized by being prepared from the following raw materials in parts by weight: 40-70%, PP resin: 20-50%, compatibilized flow modifier: 1-8%, processing aid: 1 to 5 percent; the compatibilized flow modifier is an atactic polypropylene comb-block polyolefin comprised of a polyolefin backbone and at least two atactic polypropylene combs pendant from the polyolefin backbone having a weight average molecular weight of at least 8000g/mol and a crystallinity of less than 20%; the processing aid is Fischer-Tropsch wax.
More preferably, the matting material for the BOPP film is prepared from the following raw materials in parts by weight: 50-60%, PP resin: 30-40%, compatibilized flow modifier: 5-8%, processing aid: 2 to 4 percent.
More preferably, the matting material for the BOPP film is prepared from the following raw materials in parts by weight: 53%, PP resin: 40%, compatibilized flow modifier: 5%, processing aid: 2 percent.
More preferably, the preparation method of the atactic polypropylene comb-block polyolefin comprises the following steps: 1) contacting propylene with a first metallocene precursor and an activator at a temperature of 20-70 ℃ to form a vinyl terminated atactic polypropylene having a weight average molecular weight of at least 8000g/mol and a crystallinity of less than 20%; 2) contacting the vinyl terminated atactic polypropylene with ethylene, propylene, or both, a second metallocene precursor, and an activator at a temperature of 40 to 150 ℃ to form an atactic polypropylene comb-block polyolefin.
More preferably, the HDPE is a high density polyethylene having a molecular weight distribution curve that is unimodal or bimodal and a melt index in the range of 0.03 to 1.5g/10 min.
More preferably, the PP resin is a binary or ternary polypropylene copolymer with a melt index of 6-12g/10 min.
More preferably, the preparation steps of the extinction material for the BOPP film are as follows: 1) fully mixing HDPE, PP resin, a compatibilization flow modifier and a processing aid, and extruding a melt by a double-screw extruder; 2) and extruding the melt, drying, cooling and granulating to obtain the finished product of the extinction material.
More preferably, the mixing is carried out in a high speed mixer for a mixing time of at least 20 min.
More preferably, the production temperature of the double-screw extruder is 220-240 ℃, the rotating speed is controlled at 500-550r/min, the head pressure is controlled at 20-25MPa, and the melt temperature is controlled at 195-220 ℃.
The invention has the beneficial effects that:
firstly, by adding a specific amount of a compatibilization flow modifier and a processing aid into the raw material components of the matt compound, the fluidity of the matt compound can be effectively improved, the melt index of the matt compound reaches 8-10g/10min, the matt compound is far superior to the prior art, and the production efficiency is greatly improved; and after the BOPP film is prepared, the heat sealing temperature of the BOPP film can be effectively reduced. Experiments prove that the heat sealing temperature of the BOPP film prepared by the extinction material provided by the invention is as low as 105-110 ℃; is lower than the temperature of 140-150 ℃ in the prior art by more than 30 ℃.
Secondly, the specific compatibilization flow modifier is combined with the Fischer-Tropsch wax, so that other auxiliary agents such as an antioxidant and a lubricant are not added like the traditional extinction material, the melt viscosity of the polyolefin resin is effectively reduced, and the fluidity is improved; experiments prove that the viscosity of the polyolefin resin melt can be reduced by 20-30%. When the melt is extruded, the raw material components have good dispersibility, so that the film surface fracture, bright spots and crystal spots caused by uneven dispersion during film stretching are avoided, and the yield is high.
The BOPP film prepared by the extinction material provided by the invention has excellent weather resistance, especially small thermal weight loss at high temperature and good durability; can maintain enough tensile strength at low temperature; effectively broadens the application field of BOPP.
Detailed Description
The following further describes the embodiments of the present invention, so that the technical solutions and the advantages thereof of the present invention are more clear and definite. The following description of the embodiments is exemplary in nature and is in no way intended to limit the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Example 1
The extinction material for the BOPP film is characterized by being prepared from the following raw materials in parts by weight: 53%, PP resin: 40%, compatibilized flow modifier: 5%, processing aid: 2 percent.
Wherein the HDPE is High Density Polyethylene, and is short for low pressure Polyethylene. In this example, the preferred HDPE is a high density polyethylene having a molecular weight distribution curve that is unimodal or bimodal and a melt index in the range of 1.0g/10 min.
The PP resin is polypropylene resin. Preferably, the PP resin is a binary or ternary polypropylene copolymer, and the melt index is 10g/10 min.
The compatibilized flow modifier is an atactic polypropylene comb-block polyolefin comprised of a polyolefin backbone and at least two atactic polypropylene combs pendant from the polyolefin backbone having a weight average molecular weight of at least 8000g/mol and a crystallinity of less than 20%; the processing aid is Fischer-Tropsch wax. The preparation method of the atactic polypropylene comb-block polyolefin comprises the following steps: 1) contacting propylene with a first metallocene precursor and an activator at a temperature of 20-70 ℃ to form a vinyl terminated atactic polypropylene having a weight average molecular weight of at least 8000g/mol and a crystallinity of less than 20%; 2) contacting the vinyl terminated atactic polypropylene with ethylene, propylene, or both, a second metallocene precursor, and an activator at a temperature of 40 to 150 ℃ to form an atactic polypropylene comb-block polyolefin.
The processing aid is Fischer-Tropsch wax, preferably EnHance type Fischer-Tropsch wax produced by Sasol of south Africa.
When the extinction material is actually prepared, the steps are as follows:
1) fully mixing HDPE, PP resin, a compatibilization flow modifier and a processing aid, and extruding a melt by a double-screw extruder; the full mixing is carried out in a high-speed mixer, and the mixing time is not less than 20 min. The production temperature of the double-screw extruder is 220-240 ℃, the rotating speed is controlled at 500-550r/min, the head pressure is controlled at 20-25MPa, and the melt temperature is controlled at 195-220 ℃.
2) And extruding the melt, drying, cooling and granulating to obtain the finished product of the extinction material.
In practical application, the finished extinction material prepared by the embodiment is used as a co-extruded film surface layer to prepare the BOPP extinction film.
Example 2
The extinction material for the BOPP film is characterized by being prepared from the following raw materials in parts by weight: 60%, PP resin: 30%, compatibilized flow modifier: 8%, processing aid: 2 percent. Wherein the HDPE has a melt index in the range of 0.5g/10 min. The melt index of the PP resin is 6g/10 min.
The preparation process and the application method of the matting material for the BOPP film provided in this embodiment are the same as those in embodiment 1, and are not described herein again.
Example 3
The extinction material for the BOPP film is characterized by being prepared from the following raw materials in parts by weight: 50%, PP resin: 43%, compatibilized flow modifier: 5%, processing aid: 2 percent. Wherein the HDPE has a melt index in the range of 0.03g/10 min. The PP resin has a melt index of 12g/10 min.
The preparation process and the application method of the matting material for the BOPP film provided in this embodiment are the same as those in embodiment 1, and are not described herein again.
Example 4
The extinction material for the BOPP film is characterized by being prepared from the following raw materials in parts by weight: 40%, PP resin: 50%, compatibilized flow modifier: 5%, processing aid: 5 percent. Wherein the HDPE has a melt index in the range of 1.5g/10 min. The melt index of the PP resin is 8g/10 min.
The preparation process and the application method of the matting material for the BOPP film provided in this embodiment are the same as those in embodiment 1, and are not described herein again.
Example 5
The extinction material for the BOPP film is characterized by being prepared from the following raw materials in parts by weight: 70%, PP resin: 23%, compatibilized flow modifier: 2%, processing aid: 5 percent. Wherein the HDPE has a melt index in the range of 0.8g/10 min. The melt index of the PP resin is 8g/10 min.
The preparation process and the application method of the matting material for the BOPP film provided in this embodiment are the same as those in embodiment 1, and are not described herein again.
Performance testing
The matting agents obtained in examples 1 to 5 were measured for gloss, MFR (melt index), heat-sealing temperature after film formation, and weather resistance, and the results are shown in tables 1 and 2.
Table 1, examples 1 to 5 show the results of testing the properties of matting agents
Table 2, examples 1-5 results of performance test of BOPP films
As can be seen from Table 1, the extinction material for the BOPP film provided by the invention has the advantages that the glossiness is between 7 and 8, and the extinction performance is excellent; meanwhile, the melt index reaches 8-10g/10min, which is far superior to the prior art. The heat sealing temperature of the BOPP film prepared by the extinction material provided by the invention is as low as 105-110 ℃; is lower than the temperature of 140-150 ℃ in the prior art by more than 30 ℃.
As can be seen from Table 2, the BOPP film prepared by using the extinction material provided by the invention has very excellent weather resistance, especially small thermal weight loss at high temperature and good durability; can maintain enough tensile strength at low temperature; effectively broadens the application field of BOPP.
It will be understood by those skilled in the art from the foregoing description that the present invention is not limited to the specific embodiments described above, and that modifications and substitutions based on the known art are intended to be included within the scope of the present invention as defined by the appended claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.
Claims (9)
1. The extinction material for the BOPP film is characterized by being prepared from the following raw materials in parts by weight: 40-70%, PP resin: 20-50%, compatibilized flow modifier: 1-8%, processing aid: 1 to 5 percent; the compatibilized flow modifier is an atactic polypropylene comb-block polyolefin comprised of a polyolefin backbone and at least two atactic polypropylene combs pendant from the polyolefin backbone having a weight average molecular weight of at least 8000g/mol and a crystallinity of less than 20%; the processing aid is Fischer-Tropsch wax.
2. The matting material for BOPP films according to claim 1, which is prepared from the following raw materials in parts by weight: 50-60%, PP resin: 30-40%, compatibilized flow modifier: 5-8%, processing aid: 2 to 4 percent.
3. The matting material for BOPP films according to claim 1, which is prepared from the following raw materials in parts by weight: 53%, PP resin: 40%, compatibilized flow modifier: 5%, processing aid: 2 percent.
4. The matting material for BOPP film according to claim 1, wherein the preparation method of the atactic polypropylene comb-block polyolefin comprises: 1) contacting propylene with a first metallocene precursor and an activator at a temperature of 20-70 ℃ to form a vinyl terminated atactic polypropylene having a weight average molecular weight of at least 8000g/mol and a crystallinity of less than 20%; 2) contacting the vinyl terminated atactic polypropylene with ethylene, propylene, or both, a second metallocene precursor, and an activator at a temperature of 40 to 150 ℃ to form an atactic polypropylene comb-block polyolefin.
5. The matting material for BOPP films according to claim 1 wherein the HDPE is a high density polyethylene having a unimodal or bimodal molecular weight distribution curve and a melt index in the range of 0.03 to 1.5g/10 min.
6. The matting material for BOPP film according to claim 1, wherein the PP resin is a binary or ternary polypropylene copolymer and has a melt index of 6-12g/10 min.
7. The matting material for the BOPP film according to claim 1, which is prepared by the following steps:
1) fully mixing HDPE, PP resin, a compatibilization flow modifier and a processing aid, and extruding a melt by a double-screw extruder;
2) and extruding the melt, drying, cooling and granulating to obtain the finished product of the extinction material.
8. A matting material for BOPP film according to claim 7 characterized in that said mixing is carried out in a high-speed mixer for a mixing time of at least 20 min.
9. The matting material for BOPP film as claimed in claim 7, wherein the production temperature of the twin-screw extruder is 220-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010831958.0A CN111909435A (en) | 2020-08-18 | 2020-08-18 | Extinction material for BOPP film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010831958.0A CN111909435A (en) | 2020-08-18 | 2020-08-18 | Extinction material for BOPP film |
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| CN111909435A true CN111909435A (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010831958.0A Pending CN111909435A (en) | 2020-08-18 | 2020-08-18 | Extinction material for BOPP film |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072764A (en) * | 2021-05-14 | 2021-07-06 | 广东帝通新材料股份有限公司 | High-dispersion high-fluidity low-heat-sealing-temperature polyolefin extinction material |
| CN115536929A (en) * | 2022-10-27 | 2022-12-30 | 广东美联新材料股份有限公司 | High-haze HDPE (high-density polyethylene) extinction master batch and preparation method thereof |
Citations (2)
| 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 |
| CN107949589A (en) * | 2015-09-14 | 2018-04-20 | 埃克森美孚化学专利公司 | It can be used as the atactic polypropylene comb block polyolefin of the modifying agent in polyolefin and hydrocarbon |
-
2020
- 2020-08-18 CN CN202010831958.0A patent/CN111909435A/en active Pending
Patent Citations (2)
| 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 |
| CN107949589A (en) * | 2015-09-14 | 2018-04-20 | 埃克森美孚化学专利公司 | It can be used as the atactic polypropylene comb block polyolefin of the modifying agent in polyolefin and hydrocarbon |
Non-Patent Citations (1)
| Title |
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| 岳德茂: "《印刷科技实用手册 第3分册 印刷器材篇》", 30 April 2010, 印刷工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072764A (en) * | 2021-05-14 | 2021-07-06 | 广东帝通新材料股份有限公司 | High-dispersion high-fluidity low-heat-sealing-temperature polyolefin extinction material |
| CN115536929A (en) * | 2022-10-27 | 2022-12-30 | 广东美联新材料股份有限公司 | High-haze HDPE (high-density polyethylene) extinction master batch and preparation method thereof |
| CN115536929B (en) * | 2022-10-27 | 2023-12-08 | 广东美联新材料股份有限公司 | High-haze HDPE extinction master batch and preparation method thereof |
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