JPH0225308A - Method for impregnating fiber mat with resin - Google Patents

Abstract

PURPOSE:To make it possible to continuously impregnate fiber mat-like sheet with resin having high viscosity without holding bubbles in the sheet by a method wherein fiber mat is fed in layer on viscous resin layer, which is fed in layer on a belt conveyer, and the resultant fiber mat is pressurized from above with a roll, on the surface of which a large number of circumferential grooves are provided and which is reciprocated in the direction nearly normal to the running direction of the fiber mat sheet. CONSTITUTION:Fiber mat 3 consisting of glass fiber or the like is fed in layer on resin layer 2', which is produced by feeding viscous resin 2 on a belt conveyer 1 through leveling said resin 2 with a doctor knife or the like. After that, the resultant fiber mat 3 is pressurized from above with a roll 4, on the surface 4A of which a large number of circumferential grooves 4B...4B for deaeration and which is reciprocated in the direction normal to the transferring direction (indicated with the arrow X) of the fiber mat 3 over the whole width of the fiber mat 3. Since the pressing force with the roll 4 is applied from above the fiber mat 3, the resin 2' penetrates from the under surface to the top surface of the fiber mat 3, the air containing in the interior of the fiber mat passes through gaps between fibers to the top surface and discharges in the open air.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a method of impregnating a fiber mat with resin, and more specifically, a method of impregnating a viscous uncured resin into a fiber mat continuously. Regarding the method.

[Traditional technique (hoi)]

Traditionally, to reinforce synthetic resin products, it has been widely used to impregnate fiber mats such as glass fiber non-woven fabric with resin and harden them. However, in the case of highly viscous resins, almost uniform impregnation is not possible without pressure, and some kind of pressure means is required.

In view of this, the applicant of the present application supplies a fiber mat-like sheet B onto a heel conveyor A as shown in FIG.
is dammed up with a doctor knife D, etc., and a pressure roller E is placed in the resin stagnation C', and this roller E is reciprocated in a direction perpendicular to the conveying direction (arrow X) of the conveyor A, thereby increasing the viscosity. It was previously proposed to impregnate resin C with a high content.

[Problems with conventional technology]

However, when using the above method, the air bubbles contained in the fiber mat sheet B may not be degassed properly, and resin impregnation may be performed with the air bubbles still contained, resulting in a disadvantage that uniform impregnation may not be achieved. It was.

[Problem to be solved by inventiveness]

In view of the above-mentioned drawbacks, this invention aims to provide a method for impregnating a fiber mat with a resin that can continuously impregnate a fiber mat-like sheet with a highly viscous resin without entrapping air bubbles. It was done for a purpose.

[Technology that led to solving problem C] That is, the method of impregnating a fiber mat with resin according to the present invention involves supplying a viscous resin in a layer on a heel conveyor, and supplying the fiber mat in a layer on the resin layer. Pressure is applied from above the fiber mat by reciprocating the fiber mat sheet over its entire width in a direction substantially perpendicular to the traveling direction of the fiber mat sheet using a roll having a large number of circumferential grooves arranged in parallel on its surface. .

〔Example〕

Next, the method of the present invention will be explained using an implementation device.

FIG. 1 is a side view of an apparatus for implementing the method of the invention.

The method of impregnating a fiber mat with resin according to the present invention involves supplying a viscous resin 2 onto a heald conveyor l, smoothing it into a layer of a constant thickness using a doctor knife, etc. A roll 4 is used to supply a fiber mat 3 consisting of layers in a layered manner, and a roll 4 has a large number of degassing circumferentially spaced li&4B...4B arranged side by side on the surface 4A from above the fiber mano 1-3.
The structure is such that pressure is applied while reciprocating the fiber mats 1 to 3 over the entire width thereof in a direction perpendicular to the transport direction (arrow X) of the fiber mat 3 (direction of the back of the paper in the figure).

In the above, resol-based phenolic resins and the like are suitable as the resin having tonality.

[Effect]

In this invention, since the pressing force by the roll 4 is applied from above the fiber mats 1 to 3, the resin 2° is
It permeates from the lower surface to the -L surface, and the air contained inside escapes through the gaps between the fibers to the -L surface and is released into the atmosphere.

In addition, since the roll 4 has the circumferential grooves 4B...4B, degassing can be performed smoothly.

〔effect〕

As explained above, this invention takes advantage of the viscosity of the viscous resin and presses the fiber mat onto the resin layer, allowing for very smooth degassing and trapping of air bubbles. A uniform, resin-impregnated mat without any lumps can be obtained.

[Brief explanation of the drawing]

Claims (1)

[Claims] (1) Supply viscous resin in layers on a belt conveyor,
A fiber mat is supplied in a layered manner onto the resin layer, and from above the fiber mat is reciprocated over the entire width in a direction substantially perpendicular to the traveling direction of the fiber mat sheet using a roll having a number of circumferential grooves arranged in parallel on its surface. A method for impregnating a fiber mat with a resin, the method comprising applying pressure while applying pressure.