JPS58107325A - Reinforced plastic product - 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 The present invention was produced by spinning a glass roving (hereinafter referred to as bulky i-ping) consisting mostly of filamentized continuous fiber bundles.

This invention relates to a reinforced plastic product that uses glass roving cloth (hereinafter referred to as roving cloth) with extremely good resin impregnation properties and has little delamination. Roving cloth obtained by spinning roving is widely used as a reinforcing material for glass fiber reinforced plastic products such as small reinforced plastic boats, flotation tanks, and bathtubs.

However, roving cloth is a reinforcing material obtained by weaving roving, which is a substantially parallel bundle of many long glass fiber strands, in the warp and weft directions. For this reason, the reinforcing effect of the roving cloth is large in the plane direction of the roving.

It has the major drawbacks that it deteriorates in other directions, and that it tends to peel off from between the roving cloth layers when a load is applied to the molded product.

In order to solve this problem, we developed a roving cloth made using glass fiber entwined string-like material (hereinafter referred to as spun roving) that can be strengthened in other than the roving axis direction, in which a looped glass strand is entangled with a roving strand bundle. Although it has attracted attention, the impregnation properties of glass strand bundles are poor, resulting in whitening of the molded product and the tendency for the loops to shift during molding, making it difficult to achieve sufficient reinforcing effect and causing unevenness on the surface of the molded product. It had drawbacks.

As a result of examining various roving base materials in order to solve the drawbacks of the above-mentioned conventional techniques, the present invention has been developed by introducing a roving made of continuous fiber bundles, most of which are made into filaments, into a nozzle made by spinning. As a result, the single filaments were separated from each other, and a roving cloth was produced using the bulky rovings which were intertwined with each other.

It has been found that a laminate formed using this roving cloth has no irregularities in appearance and exhibits extremely little whitening.

The thicker the bulky roving used in the roving cloth of the present invention, the worse its impregnating properties.

Thin groove impregnation is better, but roving is made from 300~
A range of 30,000 tex is particularly preferred.The roving cloth of the present invention can be easily manufactured on conventional manufacturing and processing machines.

As a method for manufacturing HQ products using the roving cloth of the present invention, it can be easily manufactured using forming methods such as the hand-laying method, pressing method, filament winding method, and drawing method, which are conventionally known as manufacturing methods for FRP products. can do. EXAMPLES The present invention will be specifically explained below using Examples and Comparative Examples.

Example 1 As shown in Figure 1, a 1,150 tex aligned roving (1) was placed into the turbulence of a high pressure air fluid nozzle (z) supplying air at a pressure of 3.0111/d. , filamentized, then roving guide roll (
4) and a roving winder guide roll (5) to prepare 254 volumes of bulky roving of about 5 scents. Using these bulky rovings, the Aiwa loom produces 11 degree vertical 6/25cm and horizontal 5.5/25cm.
A plain weave roving cloth with a mass per unit of 580 f/m' was produced by performing the driving process (2). Using ordinary roving or spun roving of the same thickness (1,150 tex) as the roving cloth manufactured in this way, a roving cloth having the same number of threads and the same mass as the roving cloth manufactured in this manner is processed using an unsaturated polyester resin solution. Laminated with.

The molded plates were tabulated. Table 1 shows the lamination workability and mechanical properties of the laminate at this time.

Table 1 Characteristics of Roving Cloth and Laminated Board From the results in Table 81, the roving cloth produced using the bulky roving according to the embodiment of the present invention has very good impregnation properties during lamination work, but the impregnation into the mold is very good. It can be seen that lamination workability is also very good. It can also be seen that the shear strength of the laminate is much better than that of the laminate using a normal roving cloth or a roving cloth having loop yarns as shown in the comparative example. This is because the glass fibers were intertwined and entered between the laminated roving cloths, increasing the single-layer peel strength.

[Brief explanation of drawings]

FIG. 1 schematically shows a method for manufacturing bulky rovings.嘗

Claims (1)

[Claims] A reinforced plastic product molded using glass roving cloth, which is made by spinning glass roving that is mostly made up of continuous filament fiber bundles.