Super-transparent EVA film and production method thereof

A transparent and smooth technology, applied in the field of film materials, can solve the problems of high haze of LLDPE film, light transmittance of PVC transparent film, poor heat preservation and weather resistance, and easy aging, so as to improve processing performance and production efficiency, reduce melting The effect of improving the bulk apparent viscosity and improving the moisture-proof performance

Active Publication Date: 2015-09-09
FUJIAN HUIYIMEI ENVIRONMENTAL PROTECTION MATERIALTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the process of blown film processing, when the resin changes from the molten state to the glass state, it is easy to generate large-sized crystal grains and the distribution of the crystal regions is uneven, which will cause irregular light refraction and light scattering on the film surface, resulting in LLDPE film High haze, poor transparency, etc.
This will not only affect the photosynthesis of crops, prolong the g

Method used

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  • Super-transparent EVA film and production method thereof
  • Super-transparent EVA film and production method thereof
  • Super-transparent EVA film and production method thereof

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preparation example Construction

[0037] A preparation method of super transparent EVA film, which comprises the following steps:

[0038] 1) Preparation of EVA open slip masterbatch: Weigh the raw materials according to the weight ratio of each component of the EVA open slip masterbatch, and combine the EVA particles, erucamide, slip agent, nano silica and fluoropolymer processing aid The agent is poured into a high-speed mixer and mixed evenly, and then heated, melted, extruded, cooled, and pelletized by a stepped twin-screw granulator to obtain EVA open slip masterbatch; among them, each section of the twin-screw extruder The temperature settings are: the first stage temperature is 170-175℃, the second stage temperature is 175-185℃, the third stage temperature is 185-195℃, and the fourth stage temperature is 195-205℃;

[0039] 2) Extrusion casting: Weigh the raw materials according to the weight ratio of each component of the super transparent EVA film, pour the EVA particles and the EVA open slip masterbatch in...

Embodiment 1

[0043] A preparation method of super transparent EVA film, which comprises the following steps:

[0044] 1) Preparation of EVA open slip masterbatch: Weigh the raw materials according to the weight ratio of the components of the EVA open slip masterbatch, and mix 100 parts of EVA particles, 5 parts of erucamide, 3 parts of slip agent, and 3 parts of nano dioxide Silicon and 1 part of fluoropolymer processing aid are sequentially poured into a high-speed mixer and mixed evenly, and then heated, melted, extruded, cooled, and pelletized by a stepped twin-screw pelletizer to obtain EVA open-sliding masterbatch ; Among them, the temperature of each section of the twin-screw extruder is set as follows: the first stage temperature is 170-175℃, the second stage temperature is 175-185℃, the third stage temperature is 185-195℃, and the fourth stage temperature is 195 -205°C;

[0045] 2) Extrusion casting: Weigh the raw materials according to the weight ratio of each component of the super t...

Embodiment 2

[0048] A preparation method of super transparent EVA film, which comprises the following steps:

[0049] 1) Preparation of EVA open slip masterbatch: Weigh the raw materials according to the weight ratio of each component of EVA open slip masterbatch, and mix 100 parts of EVA particles, 7 parts of erucamide, 5 parts of slip agent, and 4 parts of nano dioxide Silicon and 2 parts of fluoropolymer processing aid are sequentially poured into a high-speed mixer and mixed evenly, and then heated, melted, extruded, cooled, and pelletized by a stepped twin-screw pelletizer to obtain EVA open-smooth masterbatch ; Among them, the temperature of each section of the twin-screw extruder is set as follows: the first stage temperature is 170-175℃, the second stage temperature is 175-185℃, the third stage temperature is 185-195℃, and the fourth stage temperature is 195 -205°C;

[0050] 2) Extrusion casting: Weigh the raw materials according to the weight of each component of the super transparent...

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Abstract

The invention relates to the technical field of film materials, in particular to a super-transparent EVA film and a production method thereof. The super-transparent EVA film comprises, by weight, 100 parts of EVA particles and 2-5 parts of EVA opening smooth master batch. The EVA opening smooth master batch comprises, by weight, 100 parts of EVA particles, 5-10 parts of erucyl amide, 3-10 parts of smoothing agent, 3-5 parts of nano-silica, and 1-3 parts of fluoropolymer processing agent. The production method includes the steps of firstly, preparing the EVA opening smooth master batch; secondly, extrusion casting forming; thirdly, cooling and shaping. The super-transparent EVA film has the advantages that the EVA particles, the high-purity erucyl amide, the organic silicone smoothing agent, the nano-silica and the fluoropolymer processing agent of the super-transparent EVA film are complementary and have combined action, one-step extrusion forming is used, later surface processing is not needed, and when the produced super-transparent EVA film is 0.10-0.50 in thickness, the light transmittance of the EVA film can reach above 97%, the haze of the EVA film can reach below 7%, and the service life of the EVA film can reach more than 24 months.

Description

Technical field [0001] The invention relates to the technical field of film materials, in particular to a super transparent EVA film and a preparation method thereof. technical background [0002] As we all know, my country's agricultural greenhouse film production and coverage area rank first in the world. However, there is still a big gap between the current development level of agricultural shed film in my country and the advanced level in the world. These gaps are not only manifested in quantity and variety, but also in high haze (>20%) and low light transmittance ( <90%) and other performance indicators. This is because domestic greenhouse film covering materials generally use high-pressure low-density polyethylene / linear low-density polyethylene (LDPE / LLDPE) blended resins, in which LLDPE resin is catalyzed by Ziegler-Natta catalyst and follows the coordination polymerization mechanism. It is composed of copolymerization of ethylene and 1-butene. Its molecular struct...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08K13/02C08K5/20C08K3/36C08J3/22B29D7/01
CPCB29D7/01C08J3/226C08J5/18C08J2323/08C08J2423/08C08K2201/011C08L23/0853C08L2201/04C08L2201/10C08L2203/16C08L2205/025C08K13/02C08K5/20C08K3/36
Inventor 原志斌吴成旺陈兆烈陈庆荣林大添
Owner FUJIAN HUIYIMEI ENVIRONMENTAL PROTECTION MATERIALTECH CO LTD
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