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Ultra-thin EVA vacuum casting film

A vacuum casting, ultra-thin technology, used in layered products, synthetic resin layered products, chemical instruments and methods, etc., can solve the problem of inability to achieve thin film thickness, achieve excellent thermal elongation and thermal strength properties, contain Low carbon content, avoidance of porosity problems and effect of carbon increase

Pending Publication Date: 2021-02-19
永生运佳(宣城)薄膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the existing technology, the present invention provides an ultra-thin EVA vacuum casting film, which solves the problem that the domestic EVA casting film cannot realize the thinning of the film thickness while maintaining various mechanical properties to meet the use requirements and the technology of balancing various properties question

Method used

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Examples

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Effect test

Embodiment 1

[0048] Such as figure 1 As shown, the embodiment of the invention provides a kind of ultra-thin EVA vacuum casting film, comprising:

[0049] Inner layer 1: thickness 6μm, 39kg raw material A, 9kg raw material C, 1kg anti-adhesive masterbatch A, 1kg anti-adhesive masterbatch B.

[0050] Middle layer 2: Thickness ratio 48μm, 192kg raw material C, 48kg raw material D.

[0051] Outer layer 3: Thickness ratio 6μm, 39kg of raw material A, 9kg of raw material B, 1kg of anti-adhesive masterbatch A, 1kg of anti-adhesive masterbatch B.

Embodiment 2

[0053] Such as figure 1 As shown, the embodiment of the invention provides a kind of ultra-thin EVA vacuum casting film, comprising:

[0054] Inner layer 1: thickness 6μm, 39kg raw material A, 9kg raw material C, 1kg anti-adhesive masterbatch A, 1kg anti-adhesive masterbatch B.

[0055] Middle layer 2: Thickness ratio 42μm, 168kg raw material C, 72kg raw material D.

[0056] Outer layer 3: thickness ratio 12μm, 48kg of raw material A, 48kg of raw material B, 2kg of anti-adhesive masterbatch A, 2kg of anti-adhesive masterbatch B.

Embodiment 3

[0058] Such as figure 1 As shown, the embodiment of the invention provides a kind of ultra-thin EVA vacuum casting film, comprising:

[0059] Inner layer 1: thickness 12μm, 48kg raw material A, 48kg raw material C, 2kg anti-adhesive masterbatch A, 2kg anti-adhesive masterbatch B.

[0060] Middle layer 2: Thickness ratio 36μm, 108kg raw material C, 72kg raw material D.

[0061] Outer layer 3: thickness ratio 12μm, 48kg of raw material A, 48kg of raw material B, 2kg of anti-adhesive masterbatch A, 2kg of anti-adhesive masterbatch B.

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Abstract

The invention provides an ultra-thin EVA vacuum casting film, and relates to the technical field of films. The ultra-thin EVA vacuum casting film comprises an inner layer, a middle layer and an outerlayer, the middle layer is formed by matching a plurality of ethylene-vinyl acetate copolymers EVA according to a certain ratio, and the inner layer and the outer layer are formed by matching the ethylene-vinyl acetate copolymers EVA and anti-sticking master batch. The ultra-thin EVA vacuum casting film has excellent thermal extension and thermal strength properties and low carbon content. For cast steel and non-ferrous metal, the carbon content of the casting film is low, and the problems of air holes and recarburization generated in the pouring process can be avoided.

Description

technical field [0001] The invention relates to the technical field of thin films, in particular to an ultra-thin EVA vacuum casting film. Background technique [0002] V-method modeling is called the third-generation modeling method, and it is one of the most advanced modeling methods in the world. The principle is to fill a single dry sand in a sand box with an air pumping chamber as molding sand, heat and soften the plastic film, then carry out film-covering molding and seal the sand box, and rely on a vacuum pump to form a pressure difference between the inside and outside, so that the dry sand is compacted and obtained. desired cavity. The EVA (ethylene vinyl acetate) casting film used in the V method casting process usually has a thickness of 0.06-0.20mm. The film thickness below 0.1mm is called ultra-thin film, and the film between 0.1-0.2mm is called thin film. It is called a thick film between 0.2 and 0.3mm, and it is called an ultra-thick film greater than 0.3mm....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/30B32B27/20B32B7/02B32B33/00C08L23/08C08L23/06C08K3/36C08J5/18C08J3/22
CPCB32B27/08B32B27/306B32B27/20B32B7/02B32B33/00C08J5/18C08J3/226B32B2307/30C08J2323/08C08J2423/06C08J2423/08C08K3/36
Inventor 张萌朱海良侯新亮刘杰解晓霞张彤张国俊张卓
Owner 永生运佳(宣城)薄膜科技有限公司
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