JPS6011351A - Thermoplastic resin impregnated fiber laminate - 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 relates to a thermoplastic resin-impregnated fiber laminate, and more specifically, a thermoplastic resin-impregnated fiber laminate that has excellent electrical conductivity, electromagnetic shielding properties, etc., is lightweight, and has excellent mechanical strength. Regarding the body.

A thermoplastic resin-impregnated glass mantle is useful as a stamping molding material because it has high strength and rigidity, and is also lightweight and has excellent chemical resistance. however,
Due to its poor electrical conductivity (hereinafter referred to as "conductivity") and electromagnetic shielding properties, it has been difficult to use it in fields such as electric/electronic digits.

Therefore, methods such as applying metal plating to the surface of the molded product or applying conductive material paste to improve conductivity have been proposed, but the metal plating peels off after long-term use, causing electric shock. This is not desirable as it may cause an accident or fire. Also, a method of mixing conductive short fibers has been proposed, but it has the drawback that sufficient performance can be achieved unless it is mixed in a large amount, and as a result, the coloring property etc. are reduced.

The present invention solves the above-mentioned conventional drawbacks by laminating a thin layer of thermoplastic resin-impregnated carbon fiber on a thermoplastic resin-impregnated glass layer.1. The present invention provides a laminate made of laminate.

That is, the present invention provides a laminate comprising a thermoplastic resin-impregnated carbon fiber layer and a thermoplastic resin-impregnated glass fiber layer, wherein the thickness ratio of the carbon fiber layer to the glass fiber layer is the former; the latter. 1:10~50, and the blending amount is 20~89.9% by weight of thermoplastic resin, 1:1 of carbonaceous fiber.
A thermoplastic resin-impregnated fiber laminate having 0 to 0.1% by weight and 70 to 10% by weight of glass fibers is provided.

In the present invention, the carbonaceous fibers used in the thermoplastic resin-impregnated carbonaceous fiber layer are not particularly limited, and either carbon fibers or graphite fibers can be used. From the viewpoint of electrical conductivity, it is preferable to use graphite fibers. The carbonaceous fibers used have an average fiber length of 5° to 1QO1t+l+, preferably 10 to 6Qw++. Average fiber length is 5
If it is less than 100m, the conductivity decreases, which is not preferable. Moreover, if it exceeds 100 square meters, it is not preferable because the flow becomes poor when manufacturing products by compression molding. Furthermore, this carbonaceous fiber has a fiber diameter of 1 to 50μ, preferably 5 to 30μ.
are used. If the fiber diameter exceeds 50 μm, the dispersion will be poor and the conductivity will be reduced, which is not preferable. The form of the carbonaceous fiber is not particularly limited, and examples include open fiber, cloth, paper, etc., and needle-punched one is particularly preferred.

Next, there are no particular limitations on the thermoplastic resin with which the carbonaceous fibers are impregnated, and various thermoplastic resins may be used. For example, polyethylene, polypropylene, polyvinyl chloride,
Polystyrene, acrylonitrile butadiene styrene resin (AB8 resin).

Polycarbonate, polyamide, polyacetal.

Examples include polyethylene terephthalate, polyphenylene oxide, and mixtures thereof.

Toshiwake propylene homopolymer is preferred. In addition, in the present invention, it is necessary to appropriately add inorganic fillers such as calcium carbonate, Merck, and precipitated Noronurium sulfate; organic fillers such as melamine resin powder; pigments; and various additives to the above thermoplastic resin. You can also do it.

Further, as the glass fiber used for the thermoplastic resin-impregnated glass fiber layer, non-alkali glass fiber, low alkali glass fiber, borosilicate glass fiber, etc. are used. In addition,
In order to improve the adhesion between fibers and resin, alkali-free glass fibers in particular can be subjected to chemical treatments such as silane treatment and homone treatment, and can also be subjected to treatments such as metal coating treatment. This glass fiber has an average fiber length of 5 to 10
04, preferably 10 to 60, is used.

It is not preferable that the average fiber length is less than 5W because impact strength decreases. Moreover, if it exceeds 100W11, flow becomes poor when manufacturing products by compression molding, which is not preferable. Furthermore, this glass fiber has a fiber diameter of 1 to 50μ,
Preferably, those having a diameter of 5 to 60 μm are used. If the fiber diameter of the glass fiber exceeds 50μ, the tensile strength decreases, which is not preferable.

The form of the glass fiber is not particularly limited, and various forms can be used. Examples include mat, cloth, chopped strand pine F, and needle-punched mat ζ, with continuous glass fiber mats needle-punched being particularly preferred.

In addition, 1. The thermoplastic resin impregnated into the glass fibers includes those mentioned above, and is the same as that used for the thermoplastic resin-impregnated carbonaceous fiber layer.

There may be one or different ones.

Note that there is no particular restriction on the method of impregnating the above-mentioned carbonaceous fibers and glass fibers with the thermoplastic resin.

For example, the thermoplastic resin can be impregnated by heating and pressing with a laminator, continuous roller, press, etc., or by immersing it in molten resin.

The thermoplastic resin-impregnated mM: laminate of the present invention is a laminate consisting of the thermoplastic resin-impregnated carbonaceous wire # layer and the thermoplastic resin-impregnated glass fiber layer, wherein the carbonaceous fiber layer and the glass fiber layer The thickness ratio of the former: latter is 1:10 to 50, preferably former: latter is 1:15 to 45. If the J-warp ratio between the former and the latter is less than 1:10, mechanical strength such as t% impact strength decreases, which is not preferable. However, if the thickness ratio between the former and the latter exceeds 1:50, it is conductive.

This is not preferable because it reduces electromagnetic shielding properties.

In addition, the entire 1v of the laminate of the present invention is especially fl+lI
There is no limit, and it may be determined as appropriate depending on various uses.

Usually the thickness of the laminate is 0.5~10a+, especially 1
~6 fights is suitable.

Further, the blending amount of each of the above components used in the present invention is 20 to 89.9% by weight of the thermoplastic resin, preferably 47 to 89.9% by weight.
79.8% by weight, and the carbonaceous fiber is 10 to 0.1% by weight.
j1%, preferably 3-0.2% by weight, and glass fibers 70-10%, preferably 50-20% by weight. Here, the total amount of thermoplastic resin blended is 20%
If it is less than 8.9, stamping formability deteriorates.
If it exceeds 9% by weight, mechanical strength such as rigidity, tensile strength, and impact strength decreases, which is not preferable. Furthermore, even if the blending amount of carbonaceous fiber exceeds 10% by weight, the conductivity cannot be improved to an extent corresponding to the blending amount, and the moldability deteriorates. This is not preferable because it reduces performance. Further, if the amount of glass fiber blended exceeds 70% by weight, stamping formability deteriorates, and if it is less than 10% by weight, mechanical strength decreases, which is not preferable.

The thermoplastic resin-impregnated fiber laminate of the present invention having the above structure can be produced by various methods. An example of the manufacturing method is shown below.

As shown in FIG. 1, a carbon fiber mat 1. Glass fiber mat 2 with a thickness of 1 to 30 ta, preferably 5 to 15111111 and a thickness of 0.1 to 10 ta, preferably 0.2 to 5
The thermoplastic resin-impregnated fiber laminate of the present invention is produced by stacking the thermoplastic resin sheets 6 of the present invention and impregnating the fibers with the thermoplastic resin by heating and pressing them using a laminator, continuous roll, press machine, etc., and then cooling the fibers. can be manufactured.

Alternatively, the glass fiber mat impregnated with a thermoplastic resin may be produced in advance, and a carbon fiber mat may be superimposed thereon and bonded under heat and pressure.

Furthermore, when manufacturing a molded product, the thermoplastic resin gold of a predetermined size obtained by K as described above may be molded into a product of a desired shape using a stamping press after heating the fiber laminate; A carbon fiber mat may be stacked on a previously produced thermoplastic resin-impregnated glass fiber mat, and then stamping press molded.

Note that it is also possible to further laminate a glass fiber layer and/or a carbonaceous fiber layer on the thermoplastic resin-impregnated fiber laminate of the present invention.

The thermoplastic resin-impregnated fiber laminate of the present invention as described above has excellent electrical conductivity and electromagnetic shielding properties. Furthermore, the laminate of the present invention is lightweight and has excellent mechanical strength such as impact strength and tensile strength and 1 bending strength. Furthermore, the laminate of the present invention can be easily molded by stamping press molding, etc., as described above, and has excellent moldability.

Therefore, the thermoplastic resin-impregnated fiber laminate of the present invention can be effectively used as a molding material for use in parabolic antennas, various bearings, and the like, especially in the electric/electronic distribution 1 communications field.

Next, the present invention will be explained using examples.

Examples 1-2. Comparative examples 1 to 4 Needle-bunched carbon fiber mat (soy/m”.

Average fiber length 50fl, fiber diameter 20μ), needle punched low alkali glass #i fiber mat (900y/ly
/ fiber diameter 25μ) and propylene homopolymer sheet (melt index 9.0? / 101),
Using a laminator, the mixture was heated at 220° C. and 3 kg/d for 5 minutes and then cooled to produce a laminate with a thickness of 4.0111I11 [7]. Table 1 shows the manufacturing conditions and the measurement results of physical properties.

FIG. 1 is a sectional view showing one embodiment of lamination when manufacturing a thermoplastic resin-impregnated fiber laminate according to the present invention.

1...Carbon fiber mat 2...Glass fiber mat 3.Thermoplastic resin sheet Patent applicant: Idemitsu Petrochemical Co., Ltd. Nippon Sheet Glass Co., Ltd.

Claims (1)

[Claims] 1. A laminate consisting of a thermoplastic resin-impregnated carbon fiber layer and a thermoplastic resin-impregnated glass fiber layer, wherein the thickness ratio of the carbon fiber layer and the glass fiber layer is the former:the latter=
i,: 1Q~50, and the blending amount is 20~89.9% thermoplastic resin, 10~0.1% carbonaceous fiber@
% and glass fiber 70-10%.