JPS6168206A - Manufacture of prepreg for manufacturing tubular product such as fishing rod and the like - Google Patents

Abstract

PURPOSE:To prevent a whisker layer from breaking and twisting in a manufacturing process by a method wherein the whisker layer is laid on a thin fabric before it is impregnated with thermoplastic synthetic resin. CONSTITUTION:When prepregs of high strength fiber are manufactured and these prepregs are polymerized to manufacture a tubular substance such as a fishing rod, etc., long whisker fibers of 3-8m/m are scattered uniformly in the solution of low viscosity, the whisker layer is made on the thin fabric and impregnated with thermosetting synthetic resin to obtain a prepreg sheet. A fabric of glass fibers, etc. is about 0.02m/m in thickness and epoxy resin liquid or phenol resin liquid with 20-40wt% is used as thermosetting synthetic resin to be impregnated. A prepreg sheet composed of a prepreg and a sheet impregnated with resin is wound around a core bar to obtain a tubular product.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention The object of the present invention is to manufacture a prepreg using whisker long fibers, which is used in conjunction with a prepreg for manufacturing tubular bodies such as fishing rods.

Conventional Technology High strength and high elasticity whiskers are mixed into prepreg as a reinforcing material to improve the strength and elasticity of tubular bodies such as fishing rods. : is known from Japanese Patent No. 9fJna58-211442.

However, in the conventional method, the number of whiskers is 50 to 200.
Since it has a short Jam of μ, even if it is directly mixed into the thermosetting synthetic resin that forms the prepreg, it can be dispersed relatively evenly into the prepreg, but the whisker
When the fibers are as long as ~8m/m, it is extremely difficult to evenly disperse and mix them in a thermosetting synthetic resin with high viscosity, and the whiskers also break during mixing and agitation, resulting in the high strength and high elasticity characteristics of the whiskers themselves. There is a defect in the tubular body that cannot be fully utilized.

Structure of the Invention In order to improve these defects, we developed a method of manufacturing whisker long fiber prepregs separately from high-strength fiber prepregs and polymerizing these prepregs to manufacture tubular bodies such as fishing rods. In this case, the present invention is designed to produce a prepreg of high quality whisker long fibers, by uniformly dispersing whisker long fibers of 3 to 8 y After forming a whisker layer on a thin woven fabric, this is impregnated with a thermosetting synthetic resin to form prepreg sheet 1-.
The main purpose of this document is to do 34 things.

To explain the present invention in detail, silicon carbide, silicon nitride, etc. After mixing and stirring the whisker long fibers of 3 to 8 m/m to uniformly disperse them, a thin woven cloth (scrim sheet) such as glass fiber with a thickness of about 0.02yXn is placed in the tank while being stretched. Strain out the long whisker fibers, and add 0.02 to 0.0% of the long whisker fibers to the minus side.
Form a thin layer of 0.03%.

Next, this is impregnated with 20 to 40% by weight of a thermosetting synthetic resin such as an epoxy resin or a phenol resin to produce a prepreg of whisker long fibers.

The length of the long whisker fibers is preferably about 5%, and it is preferable to use a dispersion solution in which 5 to 6% of the impregnating synthetic resin is dissolved in a solvent because the whiskers are temporarily fixed on the woven fabric.

However, in order to manufacture tubular bodies such as fishing rods using whisker long fiber prepreg, this prepreg and glass fiber, carbon fiber woven fabric, or pulling sheet are impregnated with a thermosetting synthetic resin. After polymerizing the formed prepreg sheet and wrapping it around the core metal, it is bound with tape as usual.
A tubular body is manufactured by performing heat curing treatment, core bar removal, tape peeling, polishing, etc.

Effects of the Invention In the present invention, long whisker fibers are intertwined on a thin woven fabric, skived to form a uniform thin layer, and integrally bonded to the thin woven fabric with a thermosetting synthetic resin. Due to its high elasticity, the entire surface of the prepreg is uniformly reinforced, and the strength and elasticity of the tubular body produced can be improved by using it in combination with a prepreg sheet made of high-strength fibers.

Furthermore, since the whisker long fibers of the present invention are lined with a thin woven fabric, the whisker layer will not be torn or twisted during the resin impregnation process, cutting process, polymerization with high-strength fiber prepreg sheet, winding process, etc. A stable prepreg of whisker long fibers can be produced without any problems.

Claims (1)

[Claims] After whisker long fibers of 3 to 8 m/m are almost uniformly dispersed in a low viscosity solution and strained onto a thin woven fabric to form a whisker layer on the thin woven fabric, this is impregnated with a thermosetting synthetic resin. A method for manufacturing prepreg for manufacturing tubular bodies such as fishing rods, which comprises at least manufacturing a prepreg sheet.