Modification method for using low-temperature plasma to initiate gas-phase grafting on surface of polyethylene film

A technology of low-temperature plasma and polyethylene film, which is applied in the field of modification of new high-resolution materials, can solve problems such as inability to adapt and lack of large-scale continuous production, improve production efficiency, solve low and unstable peel strength, The effect of high grafting efficiency

Active Publication Date: 2012-05-02
浙江粤海包装新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method must make the plasma treatment and grafting reaction be carried out in stages, and the grafting time is as long as 15 minutes, which does not have the possibility of large-scale continuous production
[0005] At present, the speed of the polyethylene blown film production line in the flexible packaging industry is generally 0.2~1m/s. In order to meet the surface modification of polyethylene film and the efficiency of industrial production, continuous modifi

Method used

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  • Modification method for using low-temperature plasma to initiate gas-phase grafting on surface of polyethylene film
  • Modification method for using low-temperature plasma to initiate gas-phase grafting on surface of polyethylene film

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Experimental program
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Effect test

Embodiment 1

[0021] The steps of the method for modifying the surface gas phase grafting of polyethylene film induced by low-temperature plasma are as follows:

[0022] 1) Use the CW3008 low-temperature plasma processor produced by Nantong Sanxin Electronics Co., Ltd. to perform corona treatment on polyethylene film, with a processing power of 7KW and a voltage of 380V.

[0023] 2) After mixing liquid acrylic acid and ammonium persulfate at a weight ratio of 100:10, it is vaporized through a vaporization chamber at a temperature of 180°C, and sprayed uniformly in gaseous form on the surface of a corona-treated polyethylene film through a nozzle. The uniform spray flow rate of the nozzle in gaseous form is 8L / s;

[0024] 3) After irradiating with ultraviolet light with a wavelength of 365nm and a power of 5000W produced by a high-pressure mercury lamp, the activator is sensitized by ultraviolet light, triggering the gas-phase grafting of acrylic monomers on the surface of the polyethylene f...

Embodiment 2

[0029] The modification method of low-temperature plasma-induced gas-phase grafting on the surface of polyethylene film, its steps are as follows:

[0030] 1) Use the CW3008 low-temperature plasma processor produced by Nantong Sanxin Electronics Co., Ltd. to perform corona treatment on the polyethylene film. The processing power is 5KW and the voltage is 380V. The composition of the polyethylene film is linear with a weight ratio of 1:1. Low-density polyethylene (LLDPE) and low-density polyethylene (LDPE);

[0031] 2) After mixing liquid acrylonitrile and ammonium persulfate at a weight ratio of 100:5, it is vaporized through a vaporization chamber at a temperature of 140°C, and sprayed uniformly in gaseous form on the surface of the corona-treated polyethylene film through a nozzle. The uniform spray flow rate in gaseous form through the nozzle is 5L / s;

[0032] 3) After irradiating with ultraviolet light with a wavelength of 365nm and a power of 5000W produced by a high-pre...

Embodiment 3

[0035] 1) Use a low-temperature plasma processor with a power of 1KW and a voltage of 380V to perform corona treatment on the polyethylene film. The composition of the polyethylene film is linear low-density polyethylene (LLDPE) with a weight ratio of 5:1 and low Density polyethylene (LDPE);

[0036] 2) Liquid acrylic acid with a weight ratio of 100:1 is mixed with ammonium persulfate, vaporized in a vaporization chamber with a temperature of 180°C, and sprayed evenly in gaseous form on the surface of the corona-treated polyethylene film through a nozzle;

[0037] 3) After irradiating with ultraviolet light produced by a high-pressure mercury lamp with a wavelength of 365nm and a power of 500W, ammonium persulfate is sensitized by ultraviolet light, causing acrylic acid to graft in the gas phase on the surface of the polyethylene film. The flow rate of purging is 5 L / s to remove residual monomers to obtain a surface gas-phase grafted polyethylene film.

[0038] After testing, t...

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Abstract

The invention discloses a modification method for using low-temperature plasma to initiate gas-phase grafting on the surface of a polyethylene film. The modification method comprises the following steps of: 1) adopting a low-temperature plasma treatment machine with the power being 1KW-20KW and the voltage being 380V to carry out corona treatment on the polyethylene film; 2) after mixing liquid acrylic-acid monomer and an activating agent at the weight ratio being 100: (1-20), vaporizing by a vaporizing chamber with the temperature being 120-200 DEG C, and uniformly spraying on the surface ofthe polyethylene film after corona treatment by a spraying nozzle in a gaseous form; and 3) generating ultraviolet light for irradiation by a high-voltage mercury lamp with the wavelength being 365nmand the power being 500W-5000W, sensitizing the activating agent by the ultraviolet light, initiating the grafting of the acrylic-acid monomer on the surface of the polyethylene film, blowing by hot air with the temperature being 50-80 DEG C, removing the residual monomer and obtaining the polyethylene film with the gas-phase grafted surface. The modification method is high in reaction rate of gas-phase grafting on the surface, is suitable for large-scale continuous production, is lower in cost, the surface tension permanency is improved, and the problem of quality stability of the composite packaging film can be solved.

Description

technical field [0001] The invention relates to a method for modifying novel high-resolution materials, and more particularly relates to a method for modifying the surface of a polyethylene film by gas-phase grafting induced by low-temperature plasma. Background technique [0002] Non-polar polyolefin materials such as polyethylene film and polypropylene film are widely used in the packaging field, but compared with nylon film and polyester film, they have disadvantages such as low polarity, difficulty in bonding, poor composite fastness, and static electricity. . In the flexible packaging industry, in order to give full play to the advantages of various materials, adhesives are often used to compound polyethylene films with other materials. However, due to the weak surface tension of polyethylene films, the problem of low peel strength often occurs and the product quality is not good. Stablize. [0003] In order to improve the composite fastness, these materials need...

Claims

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Application Information

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IPC IPC(8): C08J7/18C08L23/06C08L23/08C08F255/02C08F120/06C08F120/44
Inventor 叶建明王猛章永明叶鹏
Owner 浙江粤海包装新材料有限公司
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