JPS62140843A - Manufacture of vinylidene fluoride resin composite board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for producing a vinylidene fluoride resin composite board reinforced with high tensile strength fibers such as glass fibers, carbon fibers, or boron fibers.

(Prior art) Generally, vinylidene fluoride resin is chemically extremely stable, and containers made of vinylidene fluoride resin do not elute metals into the liquid they contain. It is used when adding chemical solutions or ultrapure water during processing processes.

(Problems to be Solved by the Invention) However, vinylidene fluoride resin is very expensive compared to vinyl chloride resin or polycarbonate resin, and has only about half the bending strength, making it difficult to make containers as described above. In this case, the thickness must be increased, which increases the cost and the weight, making it inconvenient to handle.

On the other hand, in terms of processability, vinylidene fluoride resin is similar to vinyl chloride resin and has crystallinity, so when it is welded to make containers or heated and bent, it is difficult to weld. Strain at low and bending parts,
So-called "sink marks" may occur and the container may become deformed or damaged.

(Means for Solving the Problems) The present invention is intended to solve the problems as described in J. The gist is that the sheet-like material was impregnated with a solution, and then a vinylidene fluoride resin plate was superimposed and fused.

(Function) According to the above means, the interlayer peel strength between the sheet-like material of high-tensile fibers and the vinylidene fluoride resin plate becomes extremely high. The vinylidene fluoride resin precipitated on the surface of the sheet is fused to the overlapping vinylidene fluoride resin plate, and the vinylidene fluoride resin remaining within the sheet material exerts an anchoring effect, and furthermore, one of the high-tensile fibers in the sheet material The part penetrates into the vinylidene fluoride resin plate and strongly unites this sheet-like material and the vinylidene fluoride resin plate.

(Example) Examples of the present invention will be described in detail below with reference to the drawings.

In the figure, (1) is a plate made of vinylidene difluoride resin (hereinafter abbreviated as 2F resin), and (2) is a sheet-like product formed by gathering glass fibers (3) into a plate shape.
This sheet-like material (2) is impregnated with 2F resin.

In addition to the glass fibers (3) mentioned above, carbon fibers, boron fibers, etc. can also be used as high-tensile fibers, and these fibers can also be used as short fibers (chip strands).
, long fibers (swirl), or these fibers may be woven.

The sheet-like material (2) is impregnated with the above-mentioned 2F resin by dissolving the 2F resin in a solution obtained by dissolving the 2F resin using, for example, the following active solvent.
) and dry it at the boiling point of the solvent.

Alternatively, a gel solution obtained by swelling the 2F resin with a swelling agent as described below is applied to the sheet material (2), which is then heated to about 170° C. to 250° C. and then pressurized.

Alternatively, the sheet material (2) is immersed in an emulsion obtained by dispersing the 2F resin in an aqueous solution using an emulsifier such as F, and is heated to about 170 DEG C. to 250 DEG C. and then pressurized. In addition, if the sheet-like material (2) is simply immersed in the emulsion, the colloidal 2F resin may not permeate into the sheet-like material (2), and in this case, the emulsion may not be applied to the sheet-like material (2). While doing so, heat and pressurize with a roller.

As the solvent, for example, dimethylformamide, dimethylacetamide, trimethylphosphite, etc. are used.

As the swelling agent described in No. 111i, for example, methyl isobutyl ketone, butyl acetate, cyclohexanone, diisobutyl ketone, butyrolacetone, tetraethyl urea, infron, triethyl phosphite, propylene carbonate, dimethyl phthalic acid, etc. are used.

Examples of the emulsifier include nonionic surfactants such as perfluoroalkyl asion oxide and polyethylene glycol lauryl ether, fluorine surfactants, anionic surfactants such as perfluoroalkyl carboxylic acid, and amphoteric surfactants such as perfluoroalkyl betaine. Ionic surfactants and the like are used.

As mentioned above, the sheet-like material (2) impregnated with 2F resin is placed in the center, and the 2F resin plates (1) (1) are stacked on both sides of the sheet material (2), heated to about 190°C, and pressed. The resin plate (1) (1) is heat-sealed to the sheet-like material (2).

The 2F resin plates (1) and the sheet-like material (2) may be laminated alternately as shown in FIG. 2, and the 2F resin plates (IHI) may be placed on the outermost sides of both sides and fused together.

The 2F resin board plywood manufactured by the above manufacturing method is
The interlayer peel strength between the sheet material (2) made of glass fiber (3) and the 2F resin plate (1) is extremely high, and this 2F
The resin plate (1) and the sheet-like material (2) are strongly integrated, and in the case of the structure shown in Fig. 1, the sheet-like material (2) that supports rigidity is located in the center. It is suitable for cases where bending and welding processes are frequently used, and the structure shown in FIG. 2 is particularly suitable for those requiring rigidity.

Next, a peel test conducted using a test piece as shown in FIG. 3.4 will be explained.

First, as the 2F resin, KREM KF-1000 (commercial product) was used, and 150 g of acetone was added to 100 g of the 2F resin.
Add cc to swell, then dimethylacetamide 2
00 cc is added to prepare a solution, and this solution is applied to a sheet (2) made of No. 450 (450 g#) glass fiber (3), and impregnated by heating and pressing with a roller.

At this time, the sheet-like material (2) is formed to a thickness of about 211 mm.

2mm thick 2F resin plates (1) (1) are stacked on both sides of the sheet-like material (2) as described above, and pressed while heated to about 190°C. At this time, 2F resin board (+) (1)
is made wider than the sheet-like material (2), and an aluminum plate (4) is sandwiched between the wide part to create a non-fused part, which is used as a grip part (5) (5) in a peel tester.

25. The thus formed 2F resin composite board. , the sheet-like material (2) was cut to a length of 601 mm in width, and the sheet-like material (2) was cut into a length as shown in Fig. 4, and then subjected to a testing machine. 3) In the case of chip strands, it was 5 to 10 kg, and in the case of one swirl, it was 15 kg or more. In addition, 15 kg or more means 2F resin board (1) (1)
This was because the 2nd floor resin plate (
1) It can be seen that (1) and the sheet-like material (2) are completely integrated.

On the other hand, 2F resin plates are heat-sealed together through a sheet-like material made of untreated glass fiber (chip strand),
This was tested by forming a test piece similar to that of the present invention.
The peel strength was 1 to 2 kgL, which was poor.

(Effects of the Invention) As explained above, the vinylidene fluoride resin composite board produced by the production method of the present invention has a vinylidene fluoride resin board containing a sheet-like material made of high tensile strength fibers such as glass fiber, and the resin board and the vinylidene fluoride resin composite board. Sheet-like materials are reliably integrated and have extremely high bending and tensile strength, making them strong against distortion during welding and heating bending, and preventing deformation and breakage during the formation of containers, etc. We have now been able to eliminate this.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a resin composite plate manufactured by the manufacturing method of the present invention, Fig. 2 is a longitudinal cross-sectional view of a resin composite plate with a different structure, and Fig. 3.4 is an explanatory diagram of a peel test. Figure 3 is a perspective view;
FIG. 4 is a front view. (2F resin board (vinylidene fluoride resin board), (2
)...sheet-like material, (3)...glass fiber (high tensile strength fiber). Figure 1 Figure 2 Figure 3

Claims (3)

[Claims] (1) A sheet-like material made by gathering high-tensile fibers and molded into a sheet-like material is impregnated with a solution of vinylidene fluoride resin, and a vinylidene fluoride resin plate is superimposed on this sheet-like material and fused. A method for manufacturing a vinylidene fluoride resin composite plate. (2) The method for producing a vinylidene fluoride resin composite plate according to claim 1, characterized in that a sheet-like material is placed in the center and vinylidene fluoride resin plates are placed on both sides and fused together. (3) The invention is characterized in that sheet-like materials or vinylidene fluoride resin plates are laminated alternately, and the vinylidene fluoride resin plates are placed on the outermost sides of both sides and fused together. A method for producing vinylidene fluoride resin composite plates.