CN1721577A - Method for preparing ultrathin and ultrapure noble metal foil - Google Patents

Abstract

The present invention relates to metal foil making process and belongs to the field of noble metal processing technology. The process includes pre-coating separating layer onto film substrate; vacuum electroplating target metal onto the separately layer until reaching the required thickness; painting filming solution to the metal layer and stoving to form film; stripping off the film layer and adhered metal layer from the substrate mechanically; dissolving the film inside solution and washing to obtain thin metal layer, and drying to obtain the metal foil product. The said process can form thin metal foil with high purity in high production efficiency.

Description

Reach the new method of production as thin as a wafer to pure precious metal paillon foil

Technical field

The present invention relates to a kind of processing method of tinsel, belong to the metal manufacture field.

Background technology

The preparation tinsel is mainly continued to use the hammering method at present, gold plaque with folder and beat repeatedly, but spread is to 100nm.The common shortcoming of the tinsel of current methods production is: purity is not high, mostly is 96～98% most, causes color uneven; Limit by the cold draw performance, thinner tinsel is often broken easily; A large amount of operations are by manual operation, and labour productivity is lower.

Purpose of the present invention just provide a kind of can make purity up to 999 ‰, thickness can be less than a kind of processing method of the tinsel of 60nm.

Implementation method

The object of the present invention is achieved like this: a) on plastic film substrate such as PET, BOPP etc., with the method for vacuum plating, carry out the deposition of metal target, metal target is generally precious metal such as gold and silver, platinum etc.; B) on the good metal film layer of plating, coat film-formable solution again, and the baking and curing film forming.C) the solidified glue-line simultaneously,, peel off from plastic film substrate by mechanical force together with the metal foil layer of its adhesion.D) complex body of metal level of peeling off out and glued membrane is put into solvent simultaneously, glue-line is dissolved, cleans; E) remaining pure metal paper tinsel layer is picked up from solvent dry at last, become the tinsel finished product.

Difference in appearance:

Fluoroscopic observation is even---at the magnifying glass more than 30 times or microscopically perspective tinsel, and the thickness state that is evenly distributed, the light and shade spot that does not have the hammering process to form forms obvious difference with traditional product.

Embodiment

Embodiment 1:1) on film substrate PET, plates gold in the mode of vacuum plating; 2) on the good thin film metal layer of plating, coat water miscible viscose, and the oven dry film forming; 3), film forming glue-line simultaneously, peel off from film substrate together with the metal level of its adhesion by pull of vacuum.4) complex body of metal level of peeling off out and glued membrane is put into water simultaneously, make the glue-line dissolving, rinse well; 5), remaining at last tinsel picks up and dries, and becomes finished product.

Embodiment 2:1) at precoating separating layer and finish paint or one on the film substrate BOPP: 2) coating on the base material of auxiliary enamelled coating,, plating platinum with CVD (Chemical Vapor Deposition) method; 3) on the good platinum layer of plating, spray lacquer; 4), film forming enamelled coating simultaneously, peel off from film substrate together with the metal level of its adhesion by mechanical force.5) complex body of metal level of peeling off out and paint film is put into the solution that can dissolve this paint film simultaneously, as toluene, acetone, Tianna solution etc., paint film is dissolved, cleans, remaining at last thin metal layer picks up and dries, and becomes finished product.

Claims (3)

1, a kind of producing and manufacturing technique of tinsel is characterized in that:, from being as thin as thick formation metal foil layer, replace from thick and thin traditional hammering production technique on plastic film substrate with the vacuum plating method;

2, utilize the solution that is coated in the curable film-forming on the metal foil layer as claimed in claim 1, can become the characteristics of high-strength thin-film after doing, the thin metal layer that adheres to high-strength thin-film can be torn off from film substrate by mechanical force.

3, remove glue-line on metal as claimed in claim 2 and the glued membrane complex body with dissolution method, thereby obtain the method for purified thin metal layer.