Antibacterial barrier BOPET film and preparation method thereof

A barrier and film technology, applied in the field of antibacterial barrier BOPET film and its preparation, can solve the problems of poor optical performance, large film haze, low production efficiency, etc., and achieve excellent antibacterial effect, reduce haze, and improve barrier performance. Effect

Pending Publication Date: 2020-09-25
ANHUI GUOFENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main production method of BOPET antibacterial or barrier films in China is the coating type, that is, coating the functional coating liquid on the surface of the film. This method has problems such as environmental pollution and low producti

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  • Antibacterial barrier BOPET film and preparation method thereof

Examples

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Example Embodiment

[0025] Example 1

[0026] An antibacterial barrier BOPET film is composed of an upper surface layer, a core layer and a lower layer; its thickness is 15 μm, and the thickness of the upper and lower layers each account for 12% of the total thickness of the film.

[0027] The upper and lower layers are antibacterial layers, which are made of the following weight percentages of raw materials: 1.0% silver-loaded carbon nanotubes, 0.3% glass beads, and the balance is polyester chips; the average particle size of the glass beads is 1.5μm .

[0028] The core layer is a barrier layer, made of the following raw materials in parts by weight: EVOH 10%, nano-montmorillonite 0.8%, and the balance is polyester chips.

[0029] The present invention also provides a method for preparing the above-mentioned antibacterial barrier BOPET film, which includes the following steps:

[0030] S1. Mix EVOH, nano-montmorillonite, and polyester chips evenly, extrude them through a twin-screw extruder, dry them in ...

Example Embodiment

[0034] Example 2

[0035] An antibacterial barrier BOPET film is composed of an upper surface layer, a core layer and a lower layer; its thickness is 18 μm, and the thickness of the upper and lower layers each account for 13% of the total thickness of the film.

[0036] The upper and lower layers are antibacterial layers, which are made of the following weight percentages of raw materials: 1.1% silver-loaded carbon nanotubes, 0.35% glass beads, and the balance is polyester chips; the average particle size of the glass beads is 1.8μm .

[0037] The core layer is a barrier layer, which is made of the following raw materials in parts by weight: 12% EVOH, 0.6% nano-montmorillonite, and the balance is polyester chips.

[0038] The present invention also provides a method for preparing the above-mentioned antibacterial barrier BOPET film, which includes the following steps:

[0039] S1. Mix EVOH, nano-montmorillonite, and polyester chips uniformly, extrude them through a twin-screw extruder,...

Example Embodiment

[0043] Example 3

[0044] An antibacterial barrier BOPET film is composed of an upper surface layer, a core layer and a lower layer; its thickness is 20 μm, and the thickness of the upper and lower layers each account for 14% of the total thickness of the film.

[0045] The upper and lower layers are antibacterial layers, which are made of the following weight percentages of raw materials: 1.2% silver-loaded carbon nanotubes, 0.4% glass beads, and the balance is polyester chips; the average particle size of the glass beads is 2 μm.

[0046] The core layer is a barrier layer made of the following raw materials in parts by weight: 15% EVOH, 0.5% nano-montmorillonite, and the balance is polyester chips.

[0047] The present invention also provides a method for preparing the above-mentioned antibacterial barrier BOPET film, which includes the following steps:

[0048] S1. Mix EVOH, nano-montmorillonite, and polyester chips evenly, extrude them through a twin-screw extruder, and dry them in ...

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Abstract

The invention discloses an antibacterial barrier BOPET film and a preparation method thereof, and relates to the technical field of BOPET films, wherein the BOPET film is composed of an upper surfacelayer, a core layer and a lower surface layer; the upper surface layer and the lower surface layer are antibacterial layers and are prepared from the following raw materials: silver-loaded carbon nanotubes, glass beads and polyester chips; and the core layer is a barrier layer and is prepared from the following raw materials: EVOH, nano montmorillonite and polyester chips. According to the invention, the formula is optimized and the process parameters are adjusted; on the basis of ensuring good physical and mechanical properties and optical properties, the prepared BOPET film is excellent in antibacterial and barrier properties, the antibacterial rate reaches 99%, the oxygen diffusion coefficient is only 1/3 of that of a common BOPET film, and the BOPET film can be widely applied to the fields of food packaging and other industrial packaging.

Description

technical field [0001] The invention relates to the technical field of BOPET films, in particular to an antibacterial and barrier BOPET film and a preparation method thereof. Background technique [0002] BOPET film is widely used in the packaging field due to its good performance. It has the characteristics of high strength, good rigidity, transparency, high gloss, and good toughness. At present, the main production method of BOPET antibacterial or barrier films in China is the coating type, that is, coating a functional coating liquid on the surface of the film. This method has problems such as environmental pollution and low production efficiency. There are also a few manufacturers that produce PET antibacterial films or barrier films by internal mixing, but due to raw material formula and production process problems, the film haze is relatively large and the optical properties are poor. Contents of the invention [0003] Based on the technical problems existing in the...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/30B32B27/36B32B38/00C08L67/02C08L23/08C08K13/06C08K7/20C08K9/12C08K3/08C08K3/04C08K3/34C08J5/18B29C48/08B29C48/21B29C48/49B29C55/14
CPCB32B27/30B32B27/36B32B27/08B32B38/0004C08J5/18B29C48/0018B29C48/08B29C48/21B29C48/49B29C55/143C08J2367/02C08J2423/08C08K13/06C08K7/20C08K9/12C08K2003/0806C08K3/041C08K3/346C08K2201/011
Inventor 张少伟王红兵张涛黄剑
Owner ANHUI GUOFENG PLASTIC
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