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Mold releasing laminated film

A technology of laminating film and demoulding, applied in the direction of layered products, synthetic resin layered products, chemical instruments and methods, etc., can solve the problems of loss of film stiffness, thermal adhesion of stainless steel plates, poor operability, etc. Interlayer peeling, excellent mold release, and economical effects

Inactive Publication Date: 2009-09-16
MITSUBISHI PLASTICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if a thin fluororesin film is used in order to eliminate the cost problem, the following problems occur: the stiffness of the film is lost, the handleability is poor, thermal adhesion to the stainless steel plate occurs when the printed circuit board is manufactured, etc.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0065] figure 1 The layer constitution of the laminated film for mold release of this invention is shown. Such as figure 1 As shown in (a), the release laminate film 100A of the present invention has a layer 10 made of a modified polyolefin resin and a layer 20 made of an adhesive fluororesin laminated on at least one side of the layer.

[0066] The so-called "adhesive fluororesin" in the present invention refers to the following fluororesin: Lexpal R A3150 (Nippon Polyethylene Co., Ltd. system) and fluororesin in 4×10 5 ~5×10 5 Under the sample pressure of Pa, pressurize at 240°C for 10 minutes to produce a laminated sheet, cut the sample obtained by cutting it into a width of 2.5cm and a length of 25cm, and adopt a method based on JIS Z0237 at a peeling speed of 5mm / min and a temperature of The 180 degree peel strength at the time of measurement of 180 degree peel strength at 23 degreeC is 4 N / cm or more.

[0067] In addition, the IR spectrum of the "adhesive fluororesi...

no. 2 approach

[0089] The mold release laminated film 100 of the present invention can have a structure including a layer made of a heat-resistant resin and a layer made of a fluororesin laminated on at least one side of the layer. The invention according to the second embodiment is particularly a release laminate film that can be used very suitably even in a high-temperature environment.

[0090] Further, several layers may be further laminated as necessary on the surface opposite to the surface on which the layer made of fluororesin is laminated among the layers made of heat-resistant resin. Among them, it is preferable to laminate a layer made of a fluororesin on both sides of a layer made of a heat-resistant resin in view of exhibiting releasability on both sides and being excellent in economical efficiency.

[0091] Here, the thickness of the layer made of fluororesin is preferably 1 to 15 μm, and the thickness of the layer made of heat-resistant resin is preferably 10 to 150 μm. With ...

no. 3 approach

[0099] image 3 (a) is a cross-sectional view in the thickness direction showing the layer constitution of the release laminate film 100J according to the third embodiment of the present invention. The illustrated laminated film 100J has a three-layer structure, and layers 20a and 20b made of adhesive fluororesin are arranged on both sides of a core layer 50a. In this embodiment, the resin constituting the core layer 50a must be a resin having a melting point lower than that of the adhesive fluororesin. With such a configuration, only the resin constituting the core layer 50a can be melted by heating during press molding, and it is possible to easily follow the stepped shape of the multilayer substrate during press molding. At the end of the laminated film 100J, such as image 3 (a) As shown on the left, it is preferable to adopt a structure in which two layers of adhesive fluororesin layers 20a and 20b are directly bonded to seal the core layer 50a, but since the laminated ...

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Abstract

The invention provides a mold releasing laminated film, including a layer composed of a modified polyolefin resin does not easily generate interlayer peeling, has excellent workability and cost performance, while having surface characteristics of fluorine resin, and further, can easily follow a step-like shape of a multilayer board at the time of press formation. A mold releasing laminated film is provided with such layer and a layer composed of an adhesive fluorine resin laminated at least on one surface of such layer.

Description

[0001] This application is a divisional application with an invention title of "laminated film for mold release", its filing date is May 27, 2005, and its application number is 200580017179.0. technical field [0002] The present invention relates to a mold release laminate film having a layer made of a fluororesin on its surface, and more particularly to a mold release laminate film which is very suitable for press molding of a multilayer substrate. Background technique [0003] The release film refers to a film used for the following purposes: coating various adhesive materials, paints, etc. use. [0004] Conventionally, as these release films, fluororesin films such as Teflon (registered trademark) (PTFE), poly(4-methylpentene-1) films, and biaxially stretched polyterephthalic acid films have been used. A film of silicon-based material is coated on the surface layer of polyethylene glycol ester (PET). In particular, it is known that a film using a fluororesin for the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08
Inventor 西尾欣彦西冈润西村茂树垣下修
Owner MITSUBISHI PLASTICS INC
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