JP2545234B2 - Method for manufacturing resin-impregnated mat - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for producing a resin-impregnated mat, and more particularly to a method for producing a resin-impregnated mat useful for impregnating a highly viscous resin into a mat-like sheet. .

[Prior Art] Conventionally, as a building plate material excellent in lightweight, heat resistance, and fire resistance, a plate-shaped molded product obtained by impregnating a mat-like sheet made of a glass fiber non-woven fabric or the like with a resin such as phenol resin and curing the same is used. It is known.

By the way, in these building materials, when a resin is impregnated into a mat-like sheet made of glass fiber or the like, particularly in a highly viscous resin such as a phenol resin, it is difficult to obtain a uniformly impregnated state, In order to improve the impregnating property, it is absolutely necessary to perform a process for forcibly escaping the air bubbles contained in the mat-shaped sheet.

As the deaerating means, a mat-like sheet to which a resin is attached in advance is passed between a large number of compression rolls arranged in a zigzag pattern, and degassing is performed by bending and compression at this time, and high-frequency vibration is applied to the resin-impregnated mat-like sheet. Various means such as applying a pressure, or sandwiching between upper and lower mesh belts and compressing are adopted.

[Problems of conventional technology]

However, the first means of passing between the zigzag rolls is to arrange a large number of rolls, which requires a large amount of equipment, and the rolls have some dislocation adhesion of the resin. There is a problem that it is difficult to perform, the second means by vibration is difficult to completely deaerate, there is a problem that it may be almost invalid depending on the size of the bubbles contained inside, the mesh belt The third means for sandwiching from above and below has a problem that a device for removing the resin adhering to the mesh belt and sandwiching it from above and below becomes large.

Therefore, in the related art, there is a problem that only a thin plate material from which the internal air is relatively easily discharged can be manufactured.

[Problems to be Solved by the Invention]

In view of the above problems, the present invention enables continuous and extremely efficient degassing of a resin-impregnated mat even when a highly viscous resin is used. The purpose of the present invention is to provide a method for producing a resin-impregnated mat that can be performed.

[Technology to solve problems]

That is, the method for producing a resin-impregnated mat of the present invention is a method for producing a resin-impregnated mat in which a mat-like sheet such as a non-woven fabric that is continuously supplied is impregnated with a viscous fluid such as a resin. The surface of the supplied mat-like sheet, the rotation axis is substantially parallel to the direction of continuous supply of the mat-like sheet, and the surface of the mat-like sheet is directly provided by a roll provided with a number of circumferential grooves. It is characterized by moving and pressing substantially the entire width in the width direction.

〔Example〕

 Next, the present invention will be described with reference to examples.

1 is a plan view of an apparatus for carrying out the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a side sectional view of a more preferred embodiment of the present invention.

The method for producing a resin-impregnated mat according to the present invention is a continuous processing apparatus in which a viscous liquid 3 (FIG. 3) such as a resin is impregnated into a mat-like sheet 2 such as a woven phenol resin cloth continuously supplied by a belt conveyor 1. , The surface of the mat-like sheet 2 to which the viscous liquid 3 such as resin is supplied is made substantially parallel to the direction of continuous supply of the mat-like sheet, and circumferential grooves 4A ... 4A are formed on the surface. A large number of rolls 4 arranged side by side directly move and press the mat-like sheet 2 in the width direction over substantially the entire width B.

In this embodiment, the widthwise movement force of the roll 4 is given by the cylinder 5 that reciprocates in a direction (arrow Y) substantially perpendicular to the traveling direction (arrow X) of the mat-like sheet 2.

The reciprocating movement of the roll 4 in the arrow Y direction is
Not only the reciprocating drive cylinder 5 but also other reciprocating drive devices such as a crank mechanism can be used.

Reference numeral 6 denotes a pressure spring that presses the roll 4 onto the mat-shaped sheet 2.

In the above example, the mat-like sheet 2 to which the viscous liquid 3 is supplied is used.
Although the case where the resin 4 is pressed by the roll 4 is shown, as shown in FIG. 3, when the resin 3 is supplied by the doctor knife 7 onto the mat-shaped sheet 2 which is continuously supplied, the roll 4 is set in the resin reservoir 3 '. You may reciprocate in the paper spine direction of the figure.

[Action]

In the present invention, the mat-like sheet 2 to which the resin is supplied has its surface directly and its rotation axis is substantially parallel to the direction of continuous feeding of the mat-like sheet, and is adapted to rotate in the width direction of the mat-like sheet. Since the roll 4 is pressed by the roll 4 over almost the entire width, the internal air is pushed by the roll 4 and is discharged from the widthwise end face and the surface of the mat-like sheet 2, and at the same time, the surrounding resin flows into the deaeration marks and the air is evenly distributed. It can be a resin-impregnated mat.

Since the roll surface is provided with a large number of groove grooves 4A ... 4A, the resin which has already been impregnated is not undesirably squeezed out.

Further, as shown in FIG. 3, the roll 4 is placed in the resin reservoir 3 '.
When reciprocating, the surrounding resin is sucked during expansion and expansion after compression of the mat-shaped sheet, so more uniform impregnation can be achieved, and even thick mat-shaped sheets can be efficiently degassed and impregnated with resin. Becomes

〔effect〕

As described above, in the present invention, the air contained in the mat-like sheet is degassed from the end face and the surface in the width direction by pressing the roll, so that the impregnating property is extremely improved.

In addition, it was difficult to completely degas 300 g / m ^{2 to} 450 in the past.
Even a g / m ² glass fiber mat can be impregnated with a resin, and various effects can be obtained such that a thick plate material can be molded at one time.

[Brief description of drawings]

1 is a plan view of an apparatus for carrying out the present invention, and FIG. 2 is a plan view of FIG.
II-II sectional view, FIG. 3 is a side sectional view of a more preferred embodiment of the present invention. 1 ... Belt conveyor, 2 ... Matte sheet, 3 ...
Viscous liquid such as resin, 4 Roll 4A, circumferential groove, 5 Reciprocating cylinder.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-185608 (JP, A) JP-A-62-73914 (JP, A) JP-A-59-202818 (JP, A) JP-A-47- 12592 (JP, A) JP 59-10295 (JP, B2) JP 62-27400 (JP, Y2)

Claims (1)

(57) [Claims] 1. A method for producing a resin-impregnated mat in which a continuously supplied mat-like sheet such as a non-woven fabric is impregnated with a viscous liquid such as a resin, wherein the viscous liquid such as the resin is supplied. The surface of the mat-like sheet is directly moved by a roll having a rotation axis parallel to the direction of continuous feeding of the mat-like sheet and a large number of circumferential grooves on the surface, and is moved over substantially the entire width of the mat-like sheet. A method for producing a resin-impregnated mat, comprising: