JPH0371982B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a laminate in which a polyamide resin layer and a reinforcing fiber layer are bonded together via an adhesive, such as a polyamide resin hose with reinforcing fibers bonded to the outer periphery; The present invention relates to diaphragms made of reinforcing fibers with polyamide resin bonded to one or both surfaces, and particularly to the bonding structure thereof.

[Prior art]

When reinforcing fibers such as rayon are wound around the outer circumferential surface of a polyamide resin hose, it is extremely difficult to firmly bond them together since the polyamide resin and the fibers do not have self-adhesion properties. Conventionally, as a means of bonding a polyamide resin layer and reinforcing fibers,
The surface of the polyamide resin layer is dissolved with resorcinol, etc., and the fibers are bonded when solidified, but the fibers are simply embedded in the surface of the resin layer and no chemical bond occurs and the resin layer When bent, the fibers may peel off, and the surface of the resin layer is melted, so a decrease in strength is unavoidable.

[Purpose of the invention]

Therefore, an object of the present invention is to provide a laminate in which a polyamide resin layer and a fiber layer are firmly bonded with an adhesive interposed therebetween.

[Structure of the invention]

Therefore, in the present invention, an isocyanate adhesive layer and a chloroprene rubber layer are sequentially laminated on the surface of a polyamide resin layer to form a two-layer adhesive layer, and a fiber layer impregnated with a chloroprene rubber-based resorcinol formaldehyde latex adhesive is added on top of the two-layer adhesive layer. The above objective is achieved by laminating the layers.

〔Example〕

Isocyanate adhesive (product name: ``Chemrock 402'') is applied to the outer circumferential surface of the hose 1 made of nylon 11.
(manufactured by Road Far East Co., Ltd.) was applied to a thickness of approximately 20 μm. Furthermore, chloroprene rubber dissolved in an organic solvent was applied to a thickness of about 40 μm, and this was dried.

On the other hand, rayon fibers are impregnated with resorcin formaldehyde latex (adhesive consisting of a condensate of resorcin and formalin mixed with chloroprene rubber latex, hereinafter referred to as RFL), and the rayon fibers are wound in a braided manner on the chloroprene rubber. did. Then, by heating in a vulcanization tank, as shown in the figure, a polyamide resin (nylon 11) layer 1, an isocyanate adhesive layer 2, a chloroprene rubber layer 3, and a rayon fiber layer 5 impregnated with RFL 4 are laminated and heat treated. , got a hose.

About the hose obtained in this way JIS K6301
A peel test was conducted based on the following.

On the other hand, as a comparison material, "Chemlock 402" was applied to the outer circumference of a nylon 11 hose in the same manner as above.
On top of that, the same peeling test as above was conducted using a laminated hose with RFL-impregnated rayon fibers wrapped directly around it, omitting the application of chloroprene rubber.

As a result, the peeling load of the fiber layer in the hose of the present invention was 2.5 to 4.5 kg per cm;
The weight of the comparison material was 1 to 2 kg.

[Function and effect]

It is known that isocyanate adhesives have the effect of strongly adhering polyamide resins and chloroprene rubber. Therefore, in the present invention, an isocyanate-based adhesive layer is formed on the surface of the polyamide resin layer, while the fiber layer is impregnated with RFL containing chloroprene rubber, and this fiber layer is bonded to the above-mentioned isocyanate-based adhesive with the chloroprene rubber layer interposed. This is what I did. Therefore, the polyamide resin layer and chloroprene rubber layer are strongly bonded via the isocyanate adhesive layer, and the chloroprene rubber layer and
The RFL-impregnated fiber layer is strongly bonded to the chloroprene rubber it contains.

Although the above embodiments relate to fiber-reinforced polyamide resin hoses, the present invention is not limited to hoses, but can be widely applied to laminates including a polyamide resin layer and a reinforcing fiber layer.

[Brief explanation of drawings]

The figure is a sectional view of a fiber-reinforced resin hose according to the present invention. DESCRIPTION OF SYMBOLS 1... Polyamide resin layer, 2... Isocyanate adhesive layer, 3... Chloroprene rubber layer, 4...
...Resorcin formaldehyde latex, 5...
...Fiber layer.

Claims (1)

[Claims] 1 In a laminate in which a polyamide resin layer and a reinforcing fiber layer are bonded via an adhesive layer, an isocyanate adhesive layer is placed between the polyamide resin layer and the fiber layer on the polyamide resin layer side, and an isocyanate adhesive layer is placed on the fiber layer side. is a laminate including a synthetic resin layer and a fiber layer, in which a chloroprene rubber layer is interposed, and the fibers of the fiber layer are impregnated with a chloroprene rubber-based resorcinol formaldehyde latex adhesive.