JPS6387205A - Preparation of electrically conductive film - Google Patents

Abstract

PURPOSE:To prepare efficiently an electrically conductive film of very thin thickness of 15mum or less, by coating a plastic film having a high releasing effect with a conductive composition, and peeling the coated layer from the plastic film. CONSTITUTION:An electrically conductive film of a very high thickness whose thickness is 15mum or less can be easily prepared by coating a film having a high releasing effect such as, polyethylene film, a polypropylene film or a fluoro resin film with a conductive composition and peeling the coated layer from these plastic films, even when a conventional coating apparatus is used. The conductive film thus obtained can be used for a packaging bag for electronic parts as an anti-electrostatic material, and also used for a base material for electro-conductive heat-transfer-printing-type ribbons.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for producing a conductive film useful as an antistatic material, an electromagnetic shielding material, a base material for an electrically conductive thermal transfer type ink ribbon, etc.

(Prior art and its problems) In recent years, conductive films have been widely used as antistatic materials and electromagnetic shielding materials.
Things that used to be more than m are becoming more and more like f) with the desire to be lighter. In addition, recently, an electric heat transfer type ribbon has been introduced as an alternative to the thermal type ribbon for printers, and it is particularly required that the ribbon be extremely thin, with a thickness of 15 #Lm or less.

Generally, conductive materials are filled with a large amount of conductive material, so if the material is thick, it may be calendered or processed to increase tensile strength.
Conventional molding methods such as T-die extrusion and inflation processing can also be used.

When it comes to extremely thin materials of 15 pm or less, it is impossible to apply these processing methods in terms of tensile strength.
A casting method is generally adopted. but,
This casting method has a limited film forming speed, which not only results in an expensive film, but also requires the installation of new equipment.

(Means for Solving the Problems) Therefore, as a result of various studies, the present inventors applied a conductive composition to polyethylene film, polypropylene film, or fluorocarbon resin film, etc., which have a high mold release effect. The inventors have discovered that by coating and then peeling off the coating layer from these plastic films, it is possible to easily produce ultra-thin conductive films with a thickness of 15 μm or less even when using general-purpose coating equipment. Unreleased I
This is what led to the completion of J.J.

Next, specific aspects of the present invention will be explained with reference to Examples.

Example: Saturated polyester resin Vylon 200 (manufactured by Toyobo Co., Ltd.)
Product name): 100 tons, carbon blur, Ri: 3
Using a conductive paint consisting of 300 parts of a mixed solution of methyl ethyl ketone and toluene as a solvent (l = 1 part), coat it on a polypropylene film with a thickness of 20 JLm using a coating device so that the thickness after drying is 15 μm. 'IJl series coating], 100°C, 20 seconds of drying speed, and rolled up while drying. Next, while peeling the coating layer from the polypropylene film, both were wound up to obtain a conductive film with a thickness of 15 pm consisting only of the coating layer.

1') The conductive film can be used as an anti-static material to make bags for storing heavy duty parts, and can also be used as a nozzle material for conventional thermal transfer ribbons. there were.

(Effects of the Invention) According to the present invention, it is possible to manufacture an ultra-thin conductive film of 15 gm or less with extremely high efficiency using a general-purpose coating device, which was previously difficult, and no new equipment investment is required. , its economic effects are extremely large.

Patent applicant Shin-Etsu Polymer Co., Ltd., -7-,:,,... Agent/patent attorney Hikaru Yamamoto 7-i, 1:...-2, 1

Claims (1)

[Claims] 1. A method for producing a conductive film, which comprises coating a conductive composition on a plastic film with a high mold release effect, and then peeling off the coating layer from the plastic film.