JPH041004A - Resin prepreg for glass fiber reinforcement - Google Patents

Abstract

PURPOSE:To easily obtain a composite resin formed body making use of the combination characteristics of two kinds of materials by making up a structure consisting of the glass fiber oriented in one direction, a sheet-like material and matrix resins. CONSTITUTION:A glass fiber reinforcing prepreg 1A containing glass fiber and a prepreg 1B containing sheet-like material are wound around unwinders 3A and 3B in a condition of being retained by release papers 2. The prepregs 1A and 1B with release papers are drawn off from the unwinders 3A and 3B, fed between press rolls 4A and 4B, joined together therebetween, advanced over a hot plate 5 and run between second press rolls 6A and 6B. In this way these prepregs 1A and 1B are formed into a single sheet, which is then cooled by a cooling means and thereafter wound around a winder 8 as a laminated prepreg 7 together with the release paper 2 on the one prepreg. The release paper 2 on the other prepreg is peeled off from the laminated prepreg 7 and wound around the other winder 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a glass fiber reinforced resin prepreg. More specifically, the present invention relates to a fiber-reinforced resin prepreg including a reinforcing layer made of glass fiber and a sheet-like material layer, a method for producing the same, and a molded article obtained using the same.

[Conventional technology]

BACKGROUND ART Fiber-reinforced resin prepregs, which are made by impregnating reinforcing fibers arranged in a thin layer in one direction with a matrix resin, are widely used in various technical fields. In particular, it is widely used in the manufacture of golf club shafts, fishing rods, tennis racket frames, etc. because it is lightweight and has high mechanical strength, and has achieved good results.

Conventionally, such fiber-reinforced resin prepregs have usually been formed using one type of reinforcing fiber, but when attempting to obtain a molded product that combines the characteristics of two or more types of reinforcing fibers, each A method has been used in which prepregs containing reinforcing fibers are combined and laminated, or such prepregs are laminated with other reinforcing fibers arranged between them. Further, apart from mechanical properties such as strength, no attempt has been made to impart desired fashionability to the obtained laminate.

[Problem to be solved by the invention]

The present invention aims to provide a fiber-reinforced resin prepreg that includes a reinforcing fiber layer made of glass-reinforced fibers and a layer made of a sheet-like material separate from the reinforcing fiber layer. Thereby, the present invention makes it possible to easily provide a composite resin molded article that utilizes the composite characteristics of these two types of materials. However,
According to the fiber-reinforced resin prepreg of the present invention, the resin molded article obtained using the prepreg has not only favorable physical properties corresponding to the intended use, but also surface transparency, desired coloring properties, and a combined sheet. It is possible to give desirable fashionability by utilizing the appearance of the article.

The present invention also provides a method for manufacturing such a fiber-reinforced resin prepreg, and a composite resin molded article containing such a fiber-reinforced resin prepreg.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides the following means.

1. Glass fibers arranged in one direction and a sheet-like material,
and matrix resin.Fiber reinforced resin prepreg.

2. A fiber-reinforced resin prepreg made of glass fibers arranged in one direction and a matrix resin, and a resin prepreg made of a sheet-like material and a matrix resin are overlaid and integrated by heat pressing. A method for producing fiber-reinforced resin prepreg.

3. A large number of rows of glass fibers arranged in one direction and a sheet-like material are superimposed, and then matrix resin coated paper is superimposed on both sides of the superimposed materials, and they are integrated by heat pressing. A method for producing a characteristic fiber-reinforced resin prepreg.

4. 1. A composite resin molded article comprising the fiber-reinforced resin prepreg described above.

Glass fibers useful in the present invention have a monofilament diameter of 1
It is preferable that it is 0-20 micrometers. Such glass fibers are generally obtained as glass rovings in which up to 2000 monofilaments, preferably up to 1600 monofilaments are bundled.

Further, the sheet-like material useful in the present invention may be made of any material and may be in any form. For example, sheet-like materials include fiber fabrics such as woven fabrics, knitted fabrics, and non-woven fabrics made of general natural fibers and synthetic fibers, PAN
Inorganic fibers such as carbon and pitch-based carbon fibers and graphite fibers, alumina fibers, silicon carbide fibers, silicon nitride fibers, and boron fibers; metal fibers such as titanium fibers, amorphous fibers, stainless steel fibers, high-strength steel fibers, and aluminum fibers. , and may be in the form of a fabric or mesh made of organic fibers such as polyarylate fibers, aramid fibers, and polyethylene fibers, ordinary paper, or synthetic resin films. Further, these may have any design, and those having various woven or printed patterns may be particularly preferable from a fashion point of view.

As the matrix resin, thermosetting resins such as epoxy resins, unsaturated polyester resins, polyurethane resins, diallyl phthalate resins, and phenol resins can be used. If desired, a curing agent may be added to the matrix resin so that the curing temperature is 50 to 200°C, and various functional agents such as a flexibility imparting agent may also be added.

Among the above resins, epoxy resins are preferred, and specific examples include glycidyl ether-based epoxy resins, such as bisphenol A, bisphenol F, or bisphenol S-based epoxy resins, novolanc-based epoxy resins, and brominated bisphenol A-based epoxy resins; cycloaliphatic Group epoxy resins; glycidyl ester-based epoxy resins; glycidylamine-based epoxy resins, such as tetraglycidyldiaminodiphenylmethane, triglycidyl-P-
Aminophenols; and heterocyclic epoxy resins may be mentioned, with bisphenol A-based, bisphenol F-based and bisphenol S-based glycidylamine epoxy resins being particularly preferred. These can be used alone or in combination of two or more. These epoxy resins also contain amine curing agents such as dicyandiamide (DICY) and diaminodiphenylsulfone (DOS).
) and diaminodiphenylmethane (DDM); and acid anhydride systems, such as hexahydrophthalic anhydride (IIH);
P^), methylhexahydrophthalic anhydride (MHHPA)
) can be used, and it is particularly preferable to use an amine type curing agent.

Next, a specific example of the method for producing a fiber-reinforced resin prepreg of the present invention will be described with reference to the accompanying drawings.

In the first example, pre-prepared prepregs containing glass fibers and prepregs containing a sheet-like material are stacked on top of each other and are heat-pressed to be integrated. Specifically, as shown in FIG. 1, for example, a glass fiber-reinforced prepreg IA containing glass fibers and a prepreg IB containing a sheet-like material are held in a release paper 2, and each is placed in an unwinder (unwinding section). 3A and 3B. The prepregs IA and IB with release paper pulled out from the unwinders 3A and 3B are fed between the press rolls 4A and 4B, where they are overlapped with each other, and then fed from the hot plate 5 to between the second press loaves 176A and 6B. It will be done. In this way, these prepregs IA and IB are integrated, and then, after being cooled by a cooling means (not shown), they are wound up on a winder 8 together with the release paper 2 on one side as the prepreg 7 of the present invention. Further, the other release paper 2 is peeled off from the prepreg 7 and wound onto another winder 9,
On the other hand, a cover film 11 supplied from an unwinder 10 is attached to the side of the prepreg 7 from which the release paper 2 has been peeled off before winding.

In such a method, press rolls 4A, 4B and/or
Alternatively, the interval between 6A and 6B is set to 0.7 to 0.8 times the total thickness of the glass fiber reinforced prepreg 1 with release paper and the sheet prepreg 2 with release paper, and the hot plate 5 is made of prepreg IA , IB matrix resin is 10
Preferably, the temperature is such that the viscosity is between 0.0 and 50,000 cp.

According to the above method, a long fiber-reinforced resin prepreg can be continuously and efficiently manufactured.

Naturally, the above-described operation can also be performed using other heat pressing means.

The glass fiber-reinforced prepreg and sheet-like prepreg used in the above method can be manufactured using a normal prepreg machine comprising a hot roll press device having the same configuration as above. Thus, the construction and operation of such prepreg machines will be well understood by those skilled in the art.

In a second example of the manufacturing method of the present invention, a thin layer consisting of a large number of glass fiber rows and a sheet-like material are superimposed, and matrix resin coated paper is further superimposed on both sides of this superimposed material, Heat press to integrate. Specifically, for example, as shown in FIG.
is fed between the press rolls 4A and 4B while being spread by a spreader consisting of a series of spreader bars 20, while the sheet-like material 19 is fed between the press rolls 4A and 4B via a guide 20.
It is sent between 4B. On the other hand, first and second resin-coated papers 1 are formed by coating a matrix resin 13 on a release paper 2.
4 are wound around unwinders 3A and 3B, respectively.
The press rolls 4 are sandwiched between the fibers 18 and the sheet-like material 19, and the layers of these materials are sandwiched from both sides thereof.
It is sent between A and 4B.

Here, they are superimposed and then sent from the hot plate 5 to between the second press rolls 6A, 6B.

In this process, the fibers 18 and the sheet-like material 19 are embedded and impregnated into the matrix 13 of the first and second resin-coated papers 14 and are then cooled by a cooling means (not shown). Thereafter, as in the case of FIG. 1, the prepreg 7 of the present invention is wound up on a winder 8 together with the release paper 2 on one side and the supplied cover film 11 on the other side before being wound up.

In this case as well, press rolls 4A, 4B and/or
Alternatively, the interval between 6A and 6B is set to 0.7 to 0.8 times the total thickness of the resin-coated paper and the fiber layer, and the hot plate 5 has a matrix resin of 1000
Preferably, it is heated to a temperature that results in a viscosity of ˜50,000 cp.

The fiber-reinforced resin prepreg of the present invention obtained as described above is molded into a laminated composite resin molded article according to a conventional method. For example, a molded article can be obtained by winding a plurality of layers on a mandrel so as to overlap or by stacking a plurality of layers in a desired shape, and heat-treating the matrix resin to completely cure the matrix resin. Such a molded article has favorable characteristics that are a combination of the characteristics of each material. Alternatively, the prepreg of the present invention may be used as a surface layer of a resin laminate, thus providing a transparent surface appearance by having a glass fiber layer as the outermost layer.
If desired, colored glass fibers can also be used to provide a desirable colored appearance. Alternatively, the appearance and design of the sheet-like article can be expressed through this transparent glass layer, making it highly fashionable. Further, the prepreg of the present invention can also be used as a decorative surface material in various fields such as architecture, furniture, interior decoration, etc. by utilizing such characteristics.

[Example] The present invention will be further explained below with reference to Examples.

Example 1 A glass fiber having a monofilament diameter of 13μ is used as a reinforcing fiber, and an epoxy resin is used as a matrix resin.
100μ thick glass fiber reinforced prepreg and 70μ thick
A prepreg was obtained by overlapping and integrating a μ silk fabric and a resin prepreg made of epoxy resin by the method shown in FIG.

This prepreg is cut to a predetermined size, and when manufacturing a golf shaft by laminating ordinary fiber-reinforced prepreg, one layer is placed on the outermost layer of the lamination, with the glass fiber prepreg side facing outward.
Only the layers were wrapped. Next, according to a conventional method, it was taped, cured in an oven, the surface was polished, and a transparent coating was applied.

As a result, it was possible to obtain a shaft that does not damage the fabric layer even when the surface is polished, has a beautiful finished appearance, and allows the pattern of the silk fabric to be seen beautifully through the glass fiber layer.

Example 2 A fabric with an outer diameter of 1 was produced in the same manner as above, except that a fine mesh copper wire mesh having a thickness of 100 μm was used instead of the silk fabric.
Manufactured 9 pipes.

The obtained vibrator had good surface characteristics, the surface of which could be polished, and the copper mesh could be seen through from the outside.

[Effects of the Invention] As explained above, the fiber-reinforced prepreg of the present invention can provide a composite resin molded product having not only favorable physical properties corresponding to the intended use but also a surface appearance with excellent fashionability. It can provide a preferred surface decorative material in the field.

Furthermore, in the fiber-reinforced prepreg of the present invention, since the glass fiber layer is present, the surface can be polished, and the moldability is significantly improved.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram illustrating an embodiment of the prepreg manufacturing method of the present invention. FIG. 2 is a schematic diagram illustrating another example of the prepreg manufacturing method of the present invention. IA, IB...Prepreg, 4A, 4B, 6A, 6B...Press roller, 5...
hot plate, 13...matrix resin, 14
...Resin coated paper, 18...Glass fiber, 19
...sheet-like material.

Claims (1)

[Claims] 1. Glass fibers arranged in one direction, a sheet-like material,
and matrix resin.Fiber reinforced resin prepreg. 2. A fiber-reinforced resin prepreg made of glass fibers arranged in one direction and a matrix resin, and a resin prepreg made of a sheet-like material and a matrix resin are overlaid and integrated by heat pressing. A method for producing fiber-reinforced resin prepreg. 3. A large number of rows of glass fibers arranged in one direction and a sheet-like material are superimposed, and then matrix resin coated paper is superimposed on both sides of the superimposed materials, and they are integrated by heat pressing. A method for producing a characteristic fiber-reinforced resin prepreg. 4. A composite resin molded article comprising the fiber-reinforced resin prepreg according to claim 1.