阅读说明：本技术 一种环保长效高润湿张力透明bopp母料 (Environment-friendly long-acting high-wetting-tension transparent BOPP master batch ) 是由 邢宝刚 段景宽 吕洪香 于 2021-08-06 设计创作，主要内容包括：本发明属于塑料薄膜材料,具体涉及一种用于透明BOPP薄膜的环保长效高润湿张力透明BOPP母料,由如下成分组成：聚丙烯树脂60-80％、有机改性纳米蒙脱土1-10％、聚丙烯接枝甲基丙烯酸羟乙酯3-10％、聚酰胺-6 2-10％、乙烯-乙烯醇共聚物5-15％、聚乙烯甲基丙烯酸共聚物5-20％、热稳定剂0.2-1％。本发明解决了溶剂残留问题,利用有机改性纳米蒙脱土改善聚丙烯细化结构,并作为阻隔剂降低聚丙烯与溶剂的结合能力。(The invention belongs to plastic film materials, and particularly relates to an environment-friendly long-acting high-wetting-tension transparent BOPP master batch for a transparent BOPP film, which comprises the following components: 60-80% of polypropylene resin, 1-10% of organic modified nano montmorillonite, 3-10% of polypropylene grafted hydroxyethyl methacrylate, 62-10% of polyamide, 5-15% of ethylene-vinyl alcohol copolymer, 5-20% of polyethylene methacrylic acid copolymer and 0.2-1% of heat stabilizer. The invention solves the problem of solvent residue, improves the polypropylene refined structure by utilizing the organic modified nano-montmorillonite, and reduces the binding capacity of the polypropylene and the solvent by being used as a blocking agent.)

1. An environment-friendly, long-acting and high-wetting-tension transparent BOPP master batch is characterized in that: the composition comprises the following components:

60-80% of polypropylene resin, 1-10% of organic modified nano montmorillonite, 3-10% of polypropylene grafted hydroxyethyl methacrylate, 62-10% of polyamide, 5-15% of ethylene-vinyl alcohol copolymer, 5-20% of polyethylene methacrylic acid copolymer and 0.2-1% of heat stabilizer.

2. The transparent BOPP masterbatch according to claim 1, characterized in that: the polypropylene resin has a melt index of 2-7g/10min (230 ℃, 2.16 kg).

3. The transparent BOPP masterbatch according to claim 1, characterized in that: the content of effective substances of the organic modified nano montmorillonite is 40-50%.

4. The transparent BOPP masterbatch according to claim 1, characterized in that: the grafting rate of the polypropylene grafted hydroxyethyl methacrylate is more than 2 percent, and the melt index is 20-40g/10 min.

5. The transparent BOPP masterbatch according to claim 1, characterized in that: the polyamide-6 is a medium viscosity polyamide with a density of 1.12g/cm²。

6. The transparent BOPP masterbatch according to claim 1, characterized in that: in the ethylene-vinyl alcohol copolymer, the ethylene molar content is 20-40%, and the melt index is 2-7g/10min (230 ℃ C. 2.16 kg).

7. The transparent BOPP masterbatch according to claim 1, characterized in that: in the polyethylene methacrylic acid copolymer, the MMA molar content is 2-30%, and the melt index is 2-30g/10min (230 ℃, 2.16 kg).

8. The transparent BOPP masterbatch according to claim 1, characterized in that: the heat stabilizer is a compound heat stabilizer.

Technical Field

The invention belongs to a plastic film material, and particularly relates to an environment-friendly long-acting high-wetting-tension transparent BOPP master batch for a transparent BOPP film.

Background

The BOPP film is an important flexible packaging material, and because the surface of the BOPP film has good printability after corona treatment, the BOPP film is often used as a surface layer material of a composite film, and statistically, the BOPP accounts for about 50% of the whole film. The BOPP film treated by the power supply has surface tension of 40-43mN/m generally, and can be attenuated to 36-38mN/m generally after aging for about 2 months, and the problem of overproof solvent residue is more likely to occur after compounding and printing.

With the increasing awareness of environmental protection, alcohol-soluble, water-soluble or solvent-free composite adhesives are more likely to be used in the compounding, and non-aromatic hydrocarbon solvent inks (such as alcohol, ester-soluble inks), water-based inks, UV inks, and the like are more likely to be used in the printing. The novel environment-friendly composite adhesive and the novel environment-friendly composite ink both require that the wetting tension of a base material is more than 40mN/m, the method for improving the surface tension of a manufacturer at present mainly improves the electrode power of a corona treatment device, the method has poor effect, causes energy waste and is not environment-friendly, the application requirement of a film subjected to electrode treatment cannot be guaranteed, the film with the wetting tension improved by maleic acid glycoside grafted polypropylene has obvious peculiar smell and cannot meet the requirement of a client at present, the wetting tension is improved by adopting other polar additives, the transparency of the film is obviously reduced, the haze is increased, and the client cannot accept the film. Therefore, a need exists in the market for a BOPP masterbatch that improves solvent residue and meets the printing requirements of environmentally friendly new adhesives and environmentally friendly inks.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides an environment-friendly long-acting high-wetting-tension transparent BOPP master batch, which solves the problem of solvent residue, improves the polypropylene refined structure by utilizing organic modified nano montmorillonite, and reduces the binding capacity of polypropylene and solvent by using the organic modified nano montmorillonite as a blocking agent.

In order to achieve the technical purpose, the technical scheme of the invention is as follows:

an environment-friendly, long-acting and high-wetting-tension transparent BOPP master batch comprises the following components:

60-80% of polypropylene resin, 1-10% of organic modified nano montmorillonite, 3-10% of polypropylene grafted hydroxyethyl methacrylate, 62-10% of polyamide, 5-15% of ethylene-vinyl alcohol copolymer, 5-20% of polyethylene methacrylic acid copolymer and 0.2-1% of heat stabilizer.

The polypropylene resin is carrier resin, and the melt index is 2-7g/10min (230 ℃, 2.16 kg).

The organic modified nano montmorillonite is a modifier, and the content of effective substances is 40-50%.

The grafting rate of the polypropylene grafted hydroxyethyl methacrylate is more than 2 percent, and the melt index is 20-40g/10 min.

The polyamide-6 is a medium viscosity polyamide with a density of 1.12g/cm²。

In the ethylene-vinyl alcohol copolymer, the ethylene molar content is 20-40%, and the melt index is 2-7g/10min (230 ℃, 2.16 kg).

In the polyethylene methacrylic acid copolymer, the MMA molar content is 2-30%, and the melt index is 2-30g/10min (230 ℃, 2.16 kg).

The heat stabilizer is a compound heat stabilizer and comprises a heat stabilizer 1010 and a heat stabilizer 168.

The master batch is obtained by extruding and granulating through a parallel double-screw extruder.

The organic modified nano-montmorillonite has the function of heterogeneous nucleation, can refine the crystallization of polypropylene, improve the crystallization rate of polypropylene, reduce subsequent crystallization, and reduce the reduction of surface wetting tension in subsequent storage, and further, the adoption of the layered nano-montmorillonite can improve the barrier property of polypropylene, reduce the binding capacity of a BOPP film, toluene, ethyl acetate and the like, prevent small molecular substances in the BOPP film from being separated out to the surface, and maintain high surface wetting tension.

The polypropylene grafted hydroxyethyl methacrylate takes polypropylene resin as a substrate, has the same molecular chain main body as the polypropylene resin, can form stable compatibility with the polypropylene resin, and simultaneously, the material is grafted with hydroxyethyl and acrylic polar branched chain groups to form good compatibility with other polar materials in proportion. Therefore, the polypropylene grafted hydroxyethyl methacrylate is used as a compatilizer, a bridge structure can be formed between the polar material and the polypropylene resin, and the compatibility structure between the polypropylene resin and the polar material is improved.

Polyamide-6 is used as a wetting tension modifier, and the amide group thereof is added in a small amount to increase the surface tension of polypropylene. The ethylene vinyl alcohol copolymer has polarity, the surface tension can be improved after the ethylene vinyl alcohol copolymer is added, the material has good compatibility with polyamide-6 and also has good compatibility with polyethylene methacrylic acid copolymer, and therefore the material is used as a main compatilizer. The polyethylene methacrylic acid copolymer has the function of slightly improving the surface tension, and the material has better compatibility with ethylene vinyl alcohol and polypropylene resin, so the material is also used as a compatilizer. The synergistic effect of polyamide-6, ethylene vinyl alcohol copolymer and polyethylene methacrylic acid copolymer can effectively improve wetting tension and improve the retention capacity of wetting tension.

Detailed Description

The present invention is described in detail with reference to examples, but the present invention is not limited to the claims.

Example 1

An environment-friendly long-acting high-wetting-force transparent BOPP master batch is composed of 60% of polypropylene resin, 7% of organic modified nano montmorillonite, 6.2% of polypropylene grafted hydroxyethyl methacrylate, 6% of polyamide, 10% of ethylene vinyl alcohol copolymer, 10.5% of polyethylene methacrylic acid copolymer and 0.3% of heat stabilizer in mass ratio.

The polypropylene resin had a melt index of 3.0g/10min (230 ℃, 2.16kg) and a designation of H03 BPM.

The content of active substances of the organic modified nano montmorillonite is 45 percent, and the trademark is DK 4.

The grafting rate of the polypropylene grafted hydroxyethyl methacrylate is more than 2 percent, and the melt index is 25g/10min (230 ℃, 2.16 kg). The manufacturing method comprises the following steps: firstly, 100 parts of polypropylene powder with the trade name of 045, 2-12 parts of commercially available hydroxyethyl methacrylate and 0.1-1.0 part of commercially available bis 2, 5 vulcanizing agent are mixed in a high-speed mixer, kept warm and kept still for 2 hours, and then the mixture is processed by the following steps of: extruding by a 75 type parallel double-screw extruder of the type 1, cooling, drying and granulating. The feed speed of the twin-screw extruder was 15rpm, the main machine speed was 250rpm, and the temperature from zone one to the die was set as: 50. 215, 215.

The polyamide 6 has a designation YH800, is a medium-viscosity polyamide and has a density of 1.12g/cm²。

The ethylene-vinyl alcohol copolymer was designated as T102, had an ethylene molar content of 32% and a melt index of 2.8g/10min (230 ℃ C., 2.16 kg).

The polyethylene methacrylic acid copolymer has the brand number WH303, the MMA molar content of 18 percent and the melt index of 7.0g/10min (230 ℃, 2.16 kg).

The heat stabilizer is a common compound heat stabilizer, the main components of the heat stabilizer are 1010 and 168, and the manufacturer is Shandong Linyi Sanfeng chemical Co.

Example 2

An environment-friendly long-acting high-wetting-force transparent BOPP master batch is composed of 60% of polypropylene resin, 5% of organic modified nano montmorillonite, 6.2% of polypropylene grafted hydroxyethyl methacrylate, 6% of polyamide, 10% of ethylene vinyl alcohol copolymer, 12.5% of polyethylene methacrylic acid copolymer and 0.3% of heat stabilizer in mass ratio.

The polypropylene resin had a melt index of 3.0g/10min (230 ℃, 2.16kg) and a designation of H03 BPM.

The content of active substances of the organic modified nano montmorillonite is 45 percent, and the trademark is DK 4.

The grafting rate of the polypropylene grafted hydroxyethyl methacrylate is more than 2 percent, and the melt index is 25g/10min (230 ℃, 2.16 kg). The manufacturing method comprises the following steps: firstly, 100 parts of polypropylene powder with the trade name of 045, 2-12 parts of commercially available hydroxyethyl methacrylate and 0.1-1.0 part of commercially available bis 2, 5 vulcanizing agent are mixed in a high-speed mixer, and the mixture is stood for 2 hours and then processed by the following steps of length-diameter ratio 56: extruding by a 75 type parallel double-screw extruder of the type 1, cooling, drying and granulating. The feed speed of the twin-screw extruder was 15rpm, the main machine speed was 250rpm, and the temperature from zone one to the die was set as: 50. 215, 215.

The polyamide 6 has a designation YH800, is a medium-viscosity polyamide and has a density of 1.12g/cm²。

The ethylene-vinyl alcohol copolymer was designated as T102, had an ethylene molar content of 32% and a melt index of 2.8g/10min (230 ℃ C., 2.16 kg).

The polyethylene methacrylic acid copolymer has the brand number WH303, the MMA molar content of 18 percent and the melt index of 7.0g/10min (230 ℃, 2.16 kg).

The heat stabilizer is a common compound heat stabilizer, the main components of the heat stabilizer are 1010 and 168, and the manufacturer is Shandong Linyi Sanfeng chemical Co.

Example 3

An environment-friendly long-acting high-wetting-force transparent BOPP master batch is composed of 60% of polypropylene resin, 9% of organic modified nano montmorillonite, 6.2% of polypropylene grafted hydroxyethyl methacrylate, 6.0% of polyamide, 10% of ethylene vinyl alcohol copolymer, 8.5% of polyethylene methacrylic acid copolymer and 0.3% of heat stabilizer in mass ratio.

The polypropylene resin had a melt index of 3.0g/10min (230 ℃, 2.16kg) and a designation of H03 BPM.

The content of active substances of the organic modified nano montmorillonite is 45 percent, and the trademark is DK 4.

The grafting rate of the polypropylene grafted hydroxyethyl methacrylate is more than 2 percent, and the melt index is 25g/10min (230 ℃, 2.16 kg).

The polyamide 6 has a designation YH800, is a medium-viscosity polyamide and has a density of 1.12g/cm²。

The ethylene-vinyl alcohol copolymer was designated as T102, had an ethylene molar content of 32% and a melt index of 2.8g/10min (230 ℃ C., 2.16 kg).

The polyethylene methacrylic acid copolymer has the brand number WH303, the MMA molar content of 18 percent and the melt index of 7.0g/10min (230 ℃, 2.16 kg). The manufacturing method comprises the following steps: firstly, 100 parts of polypropylene powder with the trade name of 045, 2-12 parts of commercially available hydroxyethyl methacrylate and 0.1-1.0 part of commercially available bis 2, 5 vulcanizing agent are mixed in a high-speed mixer, and the mixture is stood for 2 hours and then processed by the following steps of length-diameter ratio 56: extruding by a 75 type parallel double-screw extruder of the type 1, cooling, drying and granulating. The feed speed of the twin-screw extruder was 15rpm, the main machine speed was 250rpm, and the temperature from zone one to the die was set as: 50. 215, 215.

The heat stabilizer is a common compound heat stabilizer, the main components of the heat stabilizer are 1010 and 168, and the manufacturer is Shandong Linyi Sanfeng chemical Co.

And (3) performance detection:

after the master batches of the embodiments 1 to 3 are respectively added to the three-layer co-extruded BOPP film corona thin layers, the materials are stored for 2 months, and the detected surface wetting tension values are all more than or equal to 42 mN/m.

Wetting tension and light Screen printing Effect of the concentrates of examples 1-3 are given in the following Table

It should be understood that the detailed description of the invention is merely illustrative of the invention and is not intended to limit the invention to the specific embodiments described. It will be appreciated by those skilled in the art that the present invention may be modified or substituted equally as well to achieve the same technical result; as long as the use requirements are met, the method is within the protection scope of the invention.