JPS5926563A - Fiber substrate for molding fiber reinforced composite material - 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 provides a method for partially fixing a large number of aligned fibers aligned in a plane on one surface of a fiber base material for molding a fiber-reinforced composite material, particularly a glass fiber sheet, under tension. It relates to fiber base materials used for reinforcing synthetic resins, cement, metals, rubber, etc.

Conventionally, glass fibers consisting of a large number of planar strands or rovings have been used as a fiber base material for molding the fiberboard 4'A having high strength in one direction.

A large number of aligned fibers M1.
Although it is suitable for impregnating and molding impregnated materials such as synthetic resin liquid, cement slurry, and molten metal continuously while moving in the longitudinal direction, it is necessary to Since the aligned fibers do not adhere to adjacent strands or rovings at all, they cannot be used in so-called batch pressure molding. This is because a large number of aligned fibers aligned in a plane,
If it is cut to the desired length required for molding, it will fall apart, and it will flow with the flow of the impregnated material during molding, making it impossible to obtain a composite material with directionality. Partial variation in performance? This is because it occurs.

Therefore, a large number of fibers arranged in a flat shape are completely bonded to the surface of a glass fiber mat using an adhesive in a stretched state, and used for batch-type pressure molding. There is a fiber base material that is suitable for batch-type pressure molding because the aligned fibers do not fall off even when cut to the desired length required for the process, but the aligned fibers do not fall off from the glass fiber mat. In order to prevent this, adhesive is applied to the entire surface of the glass fiber M1 mat, which not only increases costs, but also prevents smooth impregnation of the impregnation material in the subsequent process, making it impossible to obtain a composite material with good performance. Ta.

Furthermore, in recent years, composite materials using glass fibers have developed a high degree of tensile strength, tensile modulus of elasticity of 2, bending strength of 9.
Composite materials with physical properties such as flexural modulus were required, and attempts were made to use carbon fiber, and silicon carbide fiber,
As the development of aramid fibers progresses, the use of these fibers is also being considered.

However, these fibers, including carbon fibers, are more expensive than glass fibers.Therefore, there are so-called dispersed hybrids, in which these fibers are mixed as uniformly as possible with glass fibers, and carbon fiber fabrics, for example. So-called laminated hybrids, such as laminated structures of glass fiber mats, have come into use.

On the other hand, impregnating materials for fiber base materials are not limited to various synthetic resins, but also include cement and metals.

As a result of the diversification of materials such as rubber, it has become desirable to provide a versatile fiber base material regardless of the type of these impregnated materials.

Therefore, the present invention solves the poor impregnation of the impregnating material found in conventionally known fiber base materials, in which the glass fiber strands or rovings are completely adhered to the surface of the glass fiber mat. By using carbon fiber, silicon carbide fiber, and aramid fiber, which have higher tensile strength and tensile modulus than glass fiber, or in combination with them, we can improve the excellent properties of these fibers. Obtaining composite materials with even better performance, as well as synthetic resins and cement.

This was done with the aim of obtaining a versatile fiber base material regardless of the type of impregnated material such as metal.
As a result, a large number of strands or rovings of each of the above-mentioned fibers with the glass fibers Kdl as the ends are arranged in a plane to form a glass fiber sheet, a glass fiber mat, a glass fiber fabric, or a glass fiber mat. This problem was solved by partially fixing particulate thermofusible synthetic resin to one surface of a layered glass fiber fabric by fusing, sewing with thread, or needle punching.

FIG. 1 is a perspective view showing a first embodiment of the fiber base material of the present invention, in which 1 indicates alignment m, t(I), and a glass fiber mat 2 as a glass fiber sheet-like material. A large number of them are arranged in a plane on one surface, and 1. Particulate heat-melting synthetic resin 3 is partially fixed by point adhesion.

FIG. 2 shows a second embodiment of the fiber base 4A of the present invention, in which glass m, t (f) as a glass fiber sheet-like material in FIG. Figure 3 shows the aligned fibers, 1
was replaced with a glass fiber mat in the form of a glass fiber sheet in FIG. 1, and a glass fiber mat 5 made of a glass fiber mat 3 and a glass fiber fabric 4 twisted together was partially bonded on the surface of the glass fiber mat 5 by dot adhesion. In addition to the fixed third embodiment, FIG. 4 shows that the aligned fibers 1 are point-bonded to the surface of the Nocolas fiber fabric 5, which is a combination of the glass fiber mat 3 and the glass fiber fabric 4 in FIG. 3. Partially fixed due to
A fourth example is shown.

However, these many strands or rovings made of carbon fibers, silicon carbide fibers, and aramid fibers arranged in a planar manner, as shown in FIGS. 1 to 4, Even if it is composed of one type of fiber aligned in a plane, as shown in FIG. However, as shown in FIG. 6 ABCD, 42 arbitrarily selected types of aligned fibers are
They may be arranged in a plane alternately with wood, glass fiber,
Even if a large number of strands or rovings of any one type of fibers are arranged in a plane from among strands or rovings of carbon fibers, silicon carbide fibers, and aramid fibers,
Alternatively, strands or rovings of two or more types of fibers may be selected, arranged in a desired order, and aligned in a plane. Furthermore, when aligning in a plane, adjacent strands or rovings may be aligned. It is optional whether they are arranged closely together or arranged with a slight interval between them.

However, in the examples described above, partial fixation using fine particulate thermofusible synthetic resin is described and is shown in the drawings, but instead of using fine particulate thermofusible synthetic resin, a glass fiber sheet was used. It is also possible to stack a large number of zigzag fibers arranged in a sitting shape and sew them in the width direction with a sewing machine, etc., at an arbitrary interval, or to partially fix them with thread. The object of the present invention can also be achieved by overlapping a fibrous material with a large number of drawn fibers aligned in a plane and applying needle punching to partially fix them. The fiber base material is
It has versatility and can be used regardless of the type of impregnating material, making it extremely suitable. However, when selecting according to the impregnation 4'A rate, if the impregnation monthly rate is, for example, polyester resin,
Depending on the type of synthetic resin used as the impregnating material, fine particulate synthetic resin that is compatible with each synthetic resin may be used, such as spraying fine particulate heat-melting polyester resin and adhering and fixing it by heat melting. In the case of a cement slurry made of hydraulic cement such as Portland cement or blast furnace cement, it is sewn and fixed using synthetic fiber threads such as polypropylene or nylon, glass fiber threads, or carbon fiber threads. In this case, it is preferable to fix it by sewing with glass fiber thread, carbon marrow, or thread.

Note that when needle punching is used, there is no need for auxiliary materials such as particulate heat-melting synthetic resin or thread for sewing.

Further, for partial fixing, it is optional to use any two or more of fixing methods such as fixing using fine particulate heat-melting synthetic resin, fixing by sewing, and fixing by needle punching.

The glass fibers used in the fiber base material of the present invention are treated with a silane-based or aminosilane-based coupling agent in order to improve their bonding with synthetic resins, and are treated with cement slurries, especially hydraulic cements, such as portland cement slurry. When impregnating the glass fiber with so-called alkali-resistant glass fiber, the surface of the glass fiber should be subjected to a surface treatment to impart alkali resistance, and in order to improve the bonding with the molten metal, It is necessary to apply metal plating. Similarly, carbon fibers are treated with aminosilane-based coupling agents and other processing agents to determine the direction of bonding with synthetic resins, and coated with epoxy resin to strengthen hydraulic cement. Or, to strengthen the metal, it is necessary to plate it with a metal such as nickel. Furthermore, when silicon carbide fibers or aramid fibers are used as the fiber base material, the same treatment is applied.

Furthermore, the glass fiber mat used as the glass fiber sheet may be either a long fiber mat or a short fiber mat.

Since the fiber base material of the present invention has the above-mentioned configuration, the large number of aligned fibers aligned in a plane is bonded to the surface of the glass fiber sheet by fine particles of heat-melting synthetic resin. By sewing with thread or needle punching, each fixing point is kept aligned and partially fixed, so this fiber base material is cut into the required size for use in so-called batch-type pressure molding. Even if the fibers are aligned,
There is no risk of it falling off, and unlike conventional methods where the entire surface is fixed, it is only partially fixed at important points, so impregnation with synthetic resin and molten metal from Ten-ment Slurry 2 is smooth. A composite phase with a performance of t<"i" can be obtained by applying the Butzge pressure molding method.

In addition, in the present invention, when using particulate thermofusible synthetic resin 11 for fixing the glass fiber sheet and the roving sheet, it is necessary to select the resin depending on the type of impregnation A0') as described above. It can be widely used regardless of whether it is needle punching or impregnation.

Next, as an example, carbon fiber alone or carbon fiber and glass fiber may be added to a glass fiber sheet.
Table 1 shows the performance of the obtained composite phase when using Ester fiber and using Bo1] ester resin as the impregnated layer.
and shown in FIGS. 7 and 8. The fiber profiteers used in each trial in the table are as shown in Table 2.

Margin below 1 Table notes) 1 Composite 4 = J medium fiber base content; 40% by weight2
Polyester resin Dainippon Ink] Polylite FI1132N manufactured by Nigyo Co., Ltd.

3. Fiber content ratio The numbers in curly brackets indicate the ratio.

4. The numbers in parentheses indicate the lowest and highest values for each performance, and the number in the upper row indicates the average value.

Table 2 Carbon fiber - Torayka T300 manufactured by Toshi Co., Ltd. Glass fiber roving: Chopped strand mat Niglass fiber woven fabric: Based on these results, carbon fiber 6, which has a higher tensile strength and bending elasticity/jl-modulus than glass fiber, was used. It is clear that by doing this, it is possible to obtain a composite material that could not be obtained with a fiber base consisting only of glass fibers. The use of fibers allows composite phases with significantly better performance to be obtained.

In addition, in the fiber base material of the present invention, the directions of the aligned fibers aligned in a plane may be superimposed on each other at right angles to each other as shown in FIG. By stacking them on top of each other and using them to mold a composite phase, it is possible to obtain composite iodine with high tensile strength and tensile modulus in various directions.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a first embodiment of the fiber-based material of the present invention, in which a glass fiber mat is used as the glass fiber sheet. FIG. 2 is a perspective view of a second embodiment of the fiber base material of the present invention, in which a glass fiber fabric is used as the glass fiber sheet. FIG. 3 is a perspective view of a third embodiment of the fiber base 4A of the present invention, in which a glass fiber sheet made of a glass fiber mat and a glass fiber woven fabric is used. Fourth
This figure is a perspective view of a fourth embodiment showing another embodiment of FIG. 3. FIGS. 5A, B, C, and D are cross sections showing the case where the aligned fibers aligned in a plane used in the embodiments shown in FIGS. 1 to 4 are alternately different types of fibers. figure. Figure 6 A, B, C, and D are used in the embodiment shown in Figure 1 and Figure 4. 2 fibers and the other puller l7)
iii A cross-sectional view showing a case where one fiber M1' is sequentially arranged in a planar shape. Figure 7. FIG. 8 is a graph showing changes in performance due to differences in the mixing ratio of side fibers when glass fibers and carbon fibers are used as aligned fibers. FIG. 9 is a perspective view showing a case where two fiber base materials of the present invention are placed together in a direction in which the aligned fibers intersect at right angles. 1... Aligned glass fibers 2... Glass fiber mat 3... Particulate thermofusible synthetic resin 4... Glass fiber textile patent applicant Metobo Co., Ltd. Representative Patent Attorney Masaru Inuno Iryu No Reiko〃 Daino Ryūnosuke Kabuto 1 Zukan 3 Diagram 5 A Kabuto 5 Diagram B Almost 5 Diagram C Sho 5 Tsuri Jing 6 Diagram A Almost 6 In B Momo 6 Diagram pC August 27, 1982 [1 '11': i'l' Director-General Kazuo Wakasugi], °1 display Show f115 file"1.) °1.'1 Application No. 1.3671
No. 3 No. 2, Invention Masterpiece Fiber-Reinforced Composite Phase Molding Fiber Base Material 3, Amendments (Relationship with '1) Patent Applicant 11 Location: Gonome Aza Higashite Address, Fukushima City, Fukushima Prefecture Name
(397) Nitto Boseki Co., Ltd.■ Statement 12
Page, the top column of Table 1 "Fiber M1: Impregnation rate" is replaced with "Fiber content rate"
I corrected Zuro. 2. Same page, same table, sample 41 bending strength Il i r (c;
Correct "6-74)" to "1 (66-84)". 3. On page 16, line 11 of the specification, ``1... Aligned glass braid °'' is corrected to ``11... Aligned fiber''. 4. Correct Figure 8 as shown in the attached sheet. Procedural amendment (voluntary) September 1980, 311, Name of the invention [Indication of fiber base material for fiber-reinforced composite phase molding 3.1 Relationship with city 1'1-1'', 1 license 1 person 11 places
Name (39), Higashi Ichibanchi, Gonome, Fukushima City, Fukushima Prefecture
7) Nitto Boseki Co., Ltd. 4, Agent 5, Sode 11 Target ■ August 27, 1981 (Hori) Procedure hli official book page 2:
3rd line 11 “Saibetsu 4” is changed to “Saibetsu 3” and the 4th line “(60
~84)” to “(61~84)J+each 3TiE
do.

Claims (1)

[Claims] 1. A fiber base material for molding a fiber-reinforced composite material, in which a large number of flatly aligned fibers are partially fixed under tension to one surface of a glass fiber sheet. 2. The fiber base material according to claim 1, wherein the glass fiber sheet-like material is a glass fiber mat, a glass fiber fabric, or a combination of a glass fiber mat and a glass fiber fabric. 3. The fiber base material according to claim 1, wherein the aligned fibers are strands or rovings. 4. The fiber base material according to claim 1, wherein the aligned fibers are one or more types of glass fibers, carbon fibers, silicon carbide fibers, and aramid fibers. 5. The fiber base material according to claim 1, wherein the aligned fibers are closely aligned. 6. The fiber base material according to claim 1, wherein the aligned fibers are aligned at slight intervals.