JPH03261587A - Method for applying display printing to laminated sheet - Google Patents

Abstract

PURPOSE:To enhance manufacturing efficiency by reducing the number of processes by superposing a release film to which display printing is applied using a printing material having good adhesiveness to the thermosetting resin infiltrated in a prepreg on a plurality of prepregs to press the same under heating. CONSTITUTION:A plurality of prepregs each obtained by impregnating a fiber base material with a thermosetting resin to dry the impregnated one are superposed one upon another. Printing is applied to the single surface of a release sheet using a printing material having good adhesiveness to the thermosetting resin infiltrated in the prepregs. The printed surface of the release sheet is superposed on the prepregs to be pressed thereto under heating and subsequently released to transfer printing to the surface of the prepregs. As the sheet like release material, a plastic film having good releasability such as a polypropylene film, a triacetate film or a tetrafluoroethylene film, release paper coated with a release agent, a metal foil or a metal foil coated with a release agent are used.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for printing a display on a laminate board that is useful for improving the production efficiency of laminate boards. , Layering multiple sheets of prepreg obtained by kf & drying such as phenol resin, epoxy pattern resin, unsaturated polyester resin, etc. on paper base or glass cloth base material,
The paper base material used to produce the bottom shape by heating and pressing is generally paper made from wood bulbs or linter bulbs, and a glass cloth base is woven with glass fiber gold.

These substrates have a directionality that occurs during manufacturing, but this directionality has a large effect on the dimensions, warpage, runout, strength, etc. of the laminate, so it is important to specify the directionality of the substrate material used. The conventional directional display means prints some kind of directional display on the base 411 along with the manufacturer's salt, and ultimately leaves a lumpy print on the surface of the laminate.[Problems to be Solved by the Invention] ] The above-mentioned σ display printing method will now be described.Apart from the fiber-based roll roll to be impregnated with a thermosetting resin, a m-fiber-based a-roll roll with homogeneous display printing is prepared. A prepreg is made by impregnating each roll with gold resin and drying it. Furthermore, several sheets of prepreg obtained from the former substrate and one sheet of prepreg obtained from the latter printed substrate were heated and pressed to form a laminate. However, the conventional method requires many steps and is inefficient.

In addition, in each manufacturing process of laminated board, the printed base@
There are constraints such as an increase in the number of impregnated substrates (σ), an increase in the number of man-hours required for switching during the impregnation process, and a predetermined selection of varieties, which are the causes of a decline in production efficiency. To provide a production efficiency 4c and more useful ftm layered display printing method. A plurality of sheets of prepreg t obtained by impregnating and drying a thermosetting oil t into a base material, one side of the prepreg t, and JI! Shape material sheet 0) This is a laminate Q display printing method in which the prepreg and display printing by printing with good IUI properties are superimposed, heated and pressed, and the release material sheet is peeled off to transfer the printing.

As a sheet release shaver, apply a plastic film such as polypropylene film, triacetate film, tetrafluoroethylene film, etc. with good I type property Q, or a release agent. For the manufacture of laminated boards using pattern paper or metal foil coated with gold release agent, #I fiber base material is coated with thermosetting resin K.

Layer multiple sheets of prepreg obtained by impregnating and drying, and then #4
When using one piece of foil, use a # type piece with a display printed on the opposite side of the copper foil, and when using it on copper foil, use a display stamp on one side.
After the structure obtained by stacking the mold release pieces in a manner of 0 x σ is molded under heat and pressure, the mold release material is peeled off to obtain a laminate with a display print transferred to one side.

[Effect]

'l11m The first sheet was coated with P on one side of the prepreg.
Print using a J-curing resin and a contact printing machine.

By overlapping the printed surface of this w1un sheet and the prepreg and applying heat and pressure, the release material sheet can be peeled off and the printing can be transferred to the prepreg surface. Impregnated with linter paper and semi-cured by heating at 160℃ to make resin content 60%
Coated paper A was obtained. Layer 8 sheets of coated paper A, and add Tedra film (altr film) with a pre-printed indication on one piece f.
Layered VC, applied adhesive on the other side, and crossed a 35 μm thick σ copper recess.
/at was heated and pressed for 60 minutes, and the @m film was peeled off to obtain a single-sided copper-clad laminate.

[Comparative example]

A label was printed in advance on linter paper opposite to coated paper A obtained in Example, and the same varnish as A was impregnated and dried to obtain a resin content of 60.
% coated paper B was obtained. Layer 7 sheets of coated paper Ax, then layer one sheet of coated paper B, and on top of that, apply Tedra film (#Il type film) kNh0 and the opposite side III with adhesive 65μ.
A steel foil with a thickness of 0) was soaked under the same conditions as in the example to obtain a single-sided copper dovetail plate with a thickness of 1.6 mm.

〔Effect of the invention〕

In a comparative example using the conventional method, one prepreg with an indication print that was separated into multiple sheets of prepreg and subjected to shelf fat-containing F9 flow.
Layering the sheets is inefficient work, but it is even more so when the release film is electrolyzed as in the example.

Claims (1)

[Claims] 1. A plurality of prepregs obtained by impregnating and drying a thermosetting resin into a fiber base material are stacked, and one side of the prepreg is overlapped with the display printed surface of a release material sheet made of a printing material with good adhesion to the prepreg, and heated. 1. A method for display printing on a laminate, which comprises the steps of: after pressing, the release material sheet is peeled off to transfer the display print onto the surface of the laminate.