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eva film stress relief device

A technology for stress relief and adhesive film, applied in the field of plastic molding, can solve the problems of inability to control the flatness of EVA film and poor quality control of EVA film, and achieve the effect of reducing thermal shrinkage rate, improving efficiency and simple overall structure

Active Publication Date: 2016-06-22
浙江兆泽实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing equipment performs tempering to relieve stress after the EVA film is shaped to reduce thermal shrinkage, but the overall quality control of the EVA film is not good, and EVA cannot be performed while controlling the thermal shrinkage rate of the EVA film. Control of film flatness and other indicators

Method used

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  • eva film stress relief device

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Experimental program
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Effect test

Embodiment

[0015] The EVA adhesive film stress relief device of the present embodiment, as figure 1 As shown, it includes an infrared heating tube 2 and a concave reflector 3 arranged below the die head 1 of the extruder. The concave reflector 3 extends axially along the infrared heating tube 2, and the concave reflector 3 is arranged on one side of the diaphragm below the exit of the extruder die 1, and the infrared heating tube 2 is arranged on the focal length of the concave reflector 3.

[0016] The infrared heating tube 2 of this embodiment is three infrared heating tubes arranged side by side up and down. The concave reflector 3 is three concave reflectors arranged side by side up and down. Each infrared heating tube 2 is arranged on the focal length of a concave reflector 3 .

[0017] The infrared heating tube 2 of this embodiment is a medium-wave twin-tube infrared radiator.

[0018] Both ends of the concave reflector 3 in this embodiment are provided with reflector plugs.

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PUM

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Abstract

The invention relates to an EVA film stress relief device, which belongs to the technical field of plastic molding. The EVA film stress relief device includes an infrared heating tube and a concave reflector arranged under the extruder die head, the concave reflector extends along the axial direction of the infrared heating tube, and the concave reflector is arranged under the outlet of the extruder die head On one side of the diaphragm, the infrared heating tube is arranged on the focal length of the concave reflector. The EVA adhesive film stress relief device has the advantages of simple structure and can uniformly and effectively reduce the heat shrinkage rate of the EVA adhesive film.

Description

technical field [0001] The invention relates to an adhesive film stress relief device, which belongs to the technical field of plastic molding. Background technique [0002] At present, the encapsulation of solar cells generally adopts ethylene-vinyl acetate copolymer (EVA) film to enclose the solar cells, and glues the upper and lower layers of protective materials together to form a solar cell module. EVA is a typical random polymer compound. It has good wettability when heated and melted, and good flexibility, stress crack resistance and bonding performance when cooled and solidified. It is an ideal energy-saving material. materials for solar cell packaging. [0003] The production process used in EVA film formation is: the EVA film extruded from the extruder die head needs to be conveyed for a long distance through multiple sets of conveying rollers. During the conveying process, the EVA film can be cooled and shaped, and finally collected. after roll. [0004] The ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/88B29C48/08B29C48/91
CPCB29C48/91B29L2007/008B29C48/08B29C48/914
Inventor 顾正忠陈忠斌
Owner 浙江兆泽实业有限公司