JPH08300529A - Metal plated glass fiber preformat, and manufacture thereof - Google Patents

Abstract

PURPOSE: To obtain a metal plated glass fiber preformat having neither air rubbles nor impregnation failure in FRM, good adhesiveness between the reinforcing fibers and the metal to be reinforced, and high reliability by welding each point of intersection of metal plated glass single fibers with the same metal as the metal to be plated. CONSTITUTION: A metal plated glass fiber layer-shaped belt 41 comprising of aluminum adhered to glass fibers is put on a spreading table 42 in such a manner that the fiber winding direction is allowed to lie in the vertical direction of the paper surface. The metal plated glass fiber layer-shaped belt 41 is pulled by a first shifting net 44 to be a spread sheet 45. At this time, a fiber holding plate 43 is provided in order that the metal plated glass fiber layer-shaped belt 41 is delivered after it is made uniform in its thickness from its right end in turn. As a result, a laminated sheet is formed with a thickness of the order of 0.25mm, wherein a multiplicity of the metal plated glass single fiber layers oriented in one direction and the metal plated glass single fiber oriented in the direction intersecting therewith at 70-110 degrees are laminated alternately. Following this, they are held between heating rollers 46 so as to make the glass fiber covering aluminum molten for joining each intersecting point of fibers.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a fiber reinforced metal (FRM).
And a metal-coated glass fiber preform mat for FRM.

[0002]

2. Description of the Related Art Fiber-reinforced metal (FRM) realizes physical properties that cannot be achieved by a metal alone by compounding a fiber with a metal. However, if (1) the wettability of the fiber material used in the FRM to the metal and the ease of impregnating the fiber material into the molten metal are not good, the fiber material will not be sufficiently impregnated with the metal to be reinforced, and When air bubbles are entrained between the fiber and the metal to be reinforced, which causes a decrease in the FRM characteristic value, and (2) there is uneven distribution of the reinforcing material in the metal, the same composite material Also, the characteristic value varies depending on the direction and position, and (3) the desired characteristic value does not appear if the adhesiveness between the fiber and the reinforced metal material is poor, which greatly reduces the reliability of the FRM. It is a factor.

In order to solve such a problem, as disclosed in Japanese Patent Publication No. 6-72029, a fiber having a composition with improved wettability with a metal is used as a reinforcing material, or as disclosed in European Patent Publication 40525. A method has been proposed in which a metal oxide is applied to a reinforcing fiber, the metal oxide is subjected to a reduction treatment in a reducing atmosphere, and a metal of the same kind as the metal to be reinforced is coated in advance.

As a method for producing a metal-coated fiber, various methods such as the method shown in European Patent Publication No. 40525 described above are used, and the fiber material is metal-coated by plasma spraying or ion plating. There is.

In addition, the non-uniform distribution of the fibers in the metal often occurs even if a highly wettable fiber material is used. FR molded in advance to solve this problem
A method has been proposed in which a preform of a reinforcing fiber material is prepared in the same shape as M and is impregnated with molten metal.

Among such preforms, a mat-shaped preform is a plate-shaped, disc-shaped, or cylindrical FRM.
Is useful because it can be manufactured. As a method of manufacturing a mat-like preform, there are a method of weaving a fiber material into a woven fabric and a method of forming a non-woven fabric into a non-woven fabric.

As a method for producing a non-woven mat,
(1) Cut glass fibers into lengths of several tens of millimeters, spread them on a net to form a preliminary mat, and then sprinkle an organic binder on the preliminary mat to bond the glass fibers together to form a non-woven mat. The chopped strand method for forming, (2) similarly, the cut fibers are dispersed in water, strained with a net, coated with an organic binder, and then dried to form a non-woven mat. (3) The fibers themselves are entangled. There are a method of forming a mat with fibers having properties, (4) a needle punching method in which fibers are mechanically entangled with each other, and (5) a so-called spreading method.

A method described in Japanese Patent Publication No. 5-41106 is known as a method for producing a metal-coated glass fiber mat by utilizing a cotton spreading method. Hereinafter, a method for producing a sheet of metal-coated fiber by the spreading method will be described with reference to FIGS. 4 and 5.

In FIG. 4, reference numeral 10 denotes a glass melting tank for melting the glass 12, and a plurality of spinning nozzles 14 for discharging the molten glass are arranged in a straight line (in a direction perpendicular to the drawing paper) at predetermined intervals at the bottom thereof. It is provided to do.

Below the melting tank 10, a driving device (both not shown) for reciprocating a rotary drum 18 for winding glass fibers 16 hanging down from a nozzle 14 in the axial direction (direction perpendicular to the plane of the drawing). .) Is installed. A molten metal holding furnace 20 for applying a metal coating to the glass fiber 16 is installed at an intermediate position between the winding device and the melting tank 10. This molten metal holding furnace 20 is provided with an opening 22 on its side surface, a coating nozzle 24 is attached to this opening 22, and a glass fiber 16 is introduced into the bulging portion of the molten metal bulging from the tip of this nozzle 24. The glass fiber 16 is configured to pass through, and a part or all of the surface of the glass fiber 16 is coated with a metal. (This metal-coated glass fiber manufacturing method is hereinafter referred to as a melt coating method.)

In the manufacturing apparatus configured as described above,
The molten glass 12 in the melting tank 10 flows down from a nozzle 14, is pulled by a winding drum 18, and is stretched,
A large number of fine fibers are wound on the winding drum 18 while keeping parallel to each other. At this time, the drum 18 is reciprocated in the axial direction (the direction perpendicular to the paper surface in the figure), and the glass fibers 16 meander in a wave shape and are wound up.

When the layered bundle 26 of glass fibers wound on the rotary drum 18 reaches a predetermined thickness, the drum 1
The rotation of 8 is stopped, and the layered bundle 26 of glass fibers is cut in the axial direction of the drum 18 and removed from the drum 18.
As shown in FIG. 5, the removed rectangular bundle 26 is expanded while being stretched in a direction (or the above-mentioned cutting direction) orthogonal to or substantially orthogonal to the glass fiber (hereinafter, this stretching and unfolding operation is referred to as "spreading". The method for producing a glass nonwoven fabric by spreading the glass fiber with or without the metal coating is referred to as "the spreading method".) The spreading sheet 28 of the glass fiber is obtained.

That is, in FIG. 5, the glass fiber layered bundle 26 removed from the drum 18 is wound around another rotary drum 30 while spreading the glass fiber bundle 26 from one end thereof. The spread cotton sheet 28 thus formed includes a glass fiber layer extending in one direction, which corresponds to the glass fiber layer wound during the forward movement of the reciprocating movement of the winding drum, for example. A large number of fiber layers, which correspond to the glass fiber layers wound during the backward movement of the take-up drum and extend in the direction intersecting with the glass fiber layers by 60 to 150 degrees, are alternately laminated.
The speed of the spreading cotton is adjusted so that the crossing angle has a predetermined value.

To keep the fiber material as a reinforcing material in the FRM while keeping the fiber state of a length as long as possible,
It is important for improving the strength of M. Therefore, a woven fabric or a non-woven fabric is suitable for the sheet used as the preform. However, it is not appropriate to use a metal-coated fiber as a woven fabric because the fibers are very slippery. Therefore, a non-woven fabric is suitable for forming such a sheet of metal-coated fiber, and the above-mentioned spreading sheet is suitable as a material for a metal-coated glass fiber preform mat for FRM.

However, the expanded cotton sheet thus formed is difficult to handle because the glass fibers constituting the expanded cotton sheet are not adhered to each other and the strength of the sheet itself is low. Therefore, a method of applying an organic binder to a spreading sheet to bond fibers at fiber crossing points and increasing the strength of the sheet is adopted. That is, a binder coating device (not shown) and a binder drying device (not shown) are provided between the glass fiber layered bundle 26 and the rotary drum 30 of FIG.
While binding the fibers with a binder to form a sheet with good handleability, or while rewinding the spreading sheet of the rotary drum 30 in a separate step, the same binder coating device (not shown) and binder drying device (FIG. 3) as described above are used. It is possible to obtain a sheet having a similar handleability by passing it through a winding drum (not shown) and passing it through another winding drum (not shown).

However, as described above, when the strength of the nonwoven fabric is improved with an organic binder such as acrylic, vinyl acetate, starch paste, etc., when a high-temperature molten metal is poured during the production of FRM, the organic binder burns and gas is generated. When it is carbonized or carbonized, defects such as bubbles and foreign matters are generated in the FRM. Therefore, a method has been adopted in which the molded preform is heated immediately before the production of FRM to remove the hardening of the organic binder.

As a binder, JP-A-4-35484
1, an inorganic binder that does not react with the metal to be composited and the molten metal, or a binder of a metal similar to the metal to be composited, is mixed with the reinforcing material to form a preform, which is heated. Therefore, when it is used in a curing method, it is important that these binders are fixed only at the contact points between the reinforcing material and the reinforcing material,
Most of the added binders are fixed on the surface of the reinforcing material or in the gaps between the reinforcing materials and in the gaps between the reinforcing materials rather than the amount of fixing on the contact points, and when the FRM is formed, the flow of the molten metal is impeded to strengthen the reinforcing material. May cause poor impregnation of molten metal into the
It may interfere with the adhesion between the reinforcing material and the metal to be strengthened.

[0018]

DISCLOSURE OF THE INVENTION According to the present invention, the reinforcing fibers are uniformly dispersed in the FRM, there are no bubbles or impregnation defects in the FRM, and the adhesion between the reinforcing fibers and the metal to be reinforced is good and highly reliable. It is an object to provide a metal-coated glass fiber preform mat for molding an FRM and a method for producing the same.

[0019]

DISCLOSURE OF THE INVENTION The present invention provides a laminated sheet in which a layer of metal-coated glass single fibers extending in one direction and a layer of metal-coated glass single fibers extending in a direction intersecting with the layer are alternately laminated. In addition, the metal-coated glass fiber preform mat for FRM is characterized in that the contact points of the metal-coated glass single fibers are fused with the same metal as the coating metal.

The metal-coated glass fiber preform mat for FRM of the present invention has at least 20 of the surface of each single glass fiber (monofilament) constituting the mat.
%, More preferably the entire circumference is covered with a metal. And it is a laminated sheet in which a layer of metal-coated glass single fibers extending in one direction and a layer of metal-coated single fibers extending in a direction intersecting at an angle of 60 to 150 degrees are alternately laminated. Are uniformly dispersed in the plane direction in the laminated sheet. Further, an organic binder that is usually used for the purpose of improving the strength of the mat is not used, and the cross-contact between the fiber of a certain layer and the fiber of the layer adjacent thereto is formed by bonding with the same metal as the coating metal. Further, the metal-coated glass fiber preform mat of the present invention does not contain any foreign matter in the gap formed between the fibers.

The glass of glass fiber used for the metal-coated glass fiber mat can be made into long fibers, including glass used as a general glass fiber composition such as C composition, E composition and S composition. If it is a composition, it may be appropriately selected in combination with the desired FRM characteristics, and it has a high melting point typified by oxynitride glass,
Glass having the property of not being eroded by the molten metal can also be preferably used.

In principle, the coating metal used in the metal-coated glass fiber mat of the present invention is the same as the metal to be reinforced constituting the FRM, or if the metal to be reinforced is an alloy, the metal which is the main component of the alloy or its Although the same kind of alloy containing a metal as a main component is selected, a metal having a melting point at a temperature as low as possible is desirable based on the softening temperature of the glass of the glass fibers to be combined. In addition, there is no problem when coating with the same metal as the strengthening metal, but when coating with a different metal, the wettability between the coating metal and the strengthening metal, or when the coating metal dissolves during FRM production, the coating metal It is necessary to take into consideration the mutual mixing property and the strengthening metal, and the alloy forming property. The coating metal need not be a single element, but may be an alloy. From the viewpoint of the ease of manufacturing the metal-coated glass fiber, the glass suitable for manufacturing the long fiber generally has a softening point of about 700 to 1000 ° C., and a melt coating method is used for this.
When applying a metal coating, metals having relatively low melting points such as lead, tin, aluminum and zinc and alloys containing them as a main component are suitable. Further, as the metal to be strengthened, the above-mentioned metals such as lead, tin, aluminum, and zinc having relatively low melting points, which are the same as or similar to the coating metal, and alloys containing these as the main components are suitable. Further, if it is desired to select a coating metal having a high melting point due to the necessity of FRM production, it is necessary to select a glass having a softening temperature higher than or about the same as the melting point.

If the fiber diameter of the glass fiber constituting the fiber mat of the present invention is too small, it becomes difficult to form the mat and the surface area of the fiber increases, so that it is difficult for the molten metal to be impregnated during FRM formation. Become. On the other hand, if the fiber diameter is too thick, the fiber loses its flexibility, and when it becomes matte or FR
When it becomes M, it breaks, and when it becomes FRM, a fiber pattern appears on the surface of FRM. Therefore, the diameter of the glass fiber is preferably 5 μm to 50 μm, more preferably 10 μm to 20 μm.

If the amount of the coated metal adhered to the glass fibers is too small, the metal does not penetrate well between the fibers during FRM conversion. Also, if the adhesion amount is too large, the flexibility of the fiber is lost,
Matting becomes impossible. Therefore, the amount of the coating metal adhered to the glass fibers is usually 5 to 60% by volume, and more preferably 20 to 60%.

The weight (unit weight) per unit area of the metal-coated glass fiber mat of the present invention is the kind of the coating metal selected,
Deposition amount to the metal of the glass fibers, glass fiber diameter, and may be selected as appropriate by the production conditions in the preparation of FRM, usually, 10 g / m ² mat to 100 g / m ² is wound into a roll Since it can be taken, it is preferable because it is convenient to handle later. Similarly, the thickness of the mat can be appropriately selected, but in consideration of the case of winding into a roll, 50 μm to 1000 μm is suitable. Even in the case of the metal-coated glass fiber mat produced in these ranges, it is possible to stack a plurality of sheets for use in producing the FRM, and it is possible to substantially increase the basis weight and the thickness.

In the metal-coated fiber glass mat of the present invention, the contact points of the metal-coated glass single fibers and the metal-coated glass single fibers are joined with the same metal as the coating metal. The fibers and the fiber contact points are joined by the method described later, but when the coating metal does not cover the entire circumference of the fiber (the state of adhesion of such metal to the fiber may be referred to as a half coat hereinafter). Although some contact points are not joined by metal, some of these contact points may be joined in order to maintain the strength of the fiber mat. If the metal-coated glass fiber is not half-coated, but the coating metal covers the entire circumference of the glass fiber (the state of adhesion of the coating metal covering the entire circumference of the glass fiber with the coating metal is sometimes referred to as full-coat). , There is always a coating metal at the fiber-fiber contact point, the contact point is frequently bonded with the coating metal, the strength of the metal-coated glass fiber mat is improved, and when the FRM is manufactured,
The metal-coated glass fiber mat is easy to handle.

As a method for producing a metal-coated glass fiber mat having such a structure, the above-mentioned melt coating method is used to produce metal-coated glass fiber, and the fiber is formed into a sheet by the spreading method. The most suitable method is to heat the fiber sheet at a temperature at which the coating metal is melted and then cool it. When a sheet is formed using the spreading cotton method, the fibers in the sheet are regularly crossed and laminated, so even if a mechanical force is applied, due to the friction between the fibers, Since the sheet state can be maintained, the sheet state can be maintained even if the sheet-like material passes through the step of heating and cooling the fiber sheet at a temperature at which the coating metal melts.

As means for heating and cooling the fiber sheet,
A heating roll heated to a temperature at which the coating metal is held at a constant interval and is melted, a laminated sheet formed by the spreading method is sandwiched, and tension for heating the laminated sheet and pressurization for joining the cross contacts are performed, The metal-coated glass fiber mat of the present invention can be obtained by winding it or cutting it to a certain size. Cooling of the heated mat is naturally performed by exiting the heating roll, but providing a forced cooling device such as an air cooling fan or water cooling roll behind the heating roll reduces the weight and thickness of the metal-coated glass fiber mat. It is effective in stabilizing. Further, the thickness of the metal-coated glass fiber mat can be adjusted by providing a press roll for adjusting the thickness before or after the heating roll or the forced cooling device. It is effective to reduce the cost of the device that the cooling roll as the forced cooling device also has the function of the press roll for adjusting the thickness.

Further, instead of the heating roll, a zone for heating is separately provided, and the coating metal is melted by passing through this zone, and then adhesion of the fibers to each other by the coating metal and the thickness of the sheet are performed by a cooling press roll. The metal-coated glass fiber mat of the present invention can also be obtained by preparing the mat.

When it is desired to change the characteristics of the metal-coated glass fiber mat by the method for producing a metal-coated glass fiber mat of the present invention, the following method may be adopted. That is, when it is desired to change the glass fiber diameter, the rotary drum 18 shown in FIG.
The number of rotations of the molten glass 12 may be changed, or the amount of the molten glass 12 flowing from the nozzle 14 shown in FIG. 4 may be changed.

If it is desired to change the amount of coating metal deposited, it is sufficient to change the amount of metal bulging from the tip of the nozzle 24 attached to the molten metal holding furnace 20 shown in FIG. If the amount is reduced, a half-coated fiber is obtained, and if the amount of bulged metal is increased, a full-coated fiber is obtained.

To change the basis weight of the metal-coated glass fiber mat, the thickness of the layered bundle band 26 wound around the drum 18 shown in FIG. 4 may be changed. Therefore, the drum 18 is covered with the metal-coated glass fiber mat. You can change the winding time.

In order to change the thickness of the metal-coated glass fiber mat, a press roll for adjusting the thickness as described above is placed either in the process of changing the basis weight or in the process of heating and cooling after spreading. This can be done by changing the roll clearance.

[0034]

The metal coated glass fiber mat of the present invention comprises
In a spreading sheet in which a metal-coated glass single fiber layer extending in one direction and a metal-coated single fiber layer extending in a direction intersecting with the layer are alternately laminated, a contact point between the metal-coated glass single fibers is coated. Since it is connected with the same metal as the existing metal, when the molten metal is poured into the mat to manufacture FRM, the glass fiber is already wet with the same metal as the molten metal, so the molten metal is impregnated into the mat. Is good.

Further, since the metal-coated glass fiber mat of the present invention is previously formed into a sheet by the spreading method, the fibers are uniformly dispersed one by one, and the molten metal is formed into the mat. When the FRM is manufactured by pouring, the glass fibers are uniformly dispersed in the metal, and the composite action for strengthening can be maximized.

Furthermore, the metal-coated glass fiber mat of the present invention does not use an organic binder for maintaining the shape of the mat, but bonds the cross-contacts of the fibers with the same composition metal as the metal to be strengthened to form the shape of the mat. Therefore, the bubbles due to the combustion gas of the organic binder generated when the organic binder is used are not generated in the FRM.

Further, since the metal-coated glass fiber mat of the present invention has no residual foreign matter due to the metal or the inorganic substance added for the purpose of joining the cross-contact between the fibers in the gap formed between the fibers, It does not impede the flow of molten metal when it is made into FRM, and it does not contain the inorganic substance that coats the glass fiber surface due to the inorganic substance added for the purpose of joining the fiber to the fiber contact point. Since there is nothing that hinders the adhesion of the metal to be reinforced, bubbles and defective adhesion between the fiber and the metal do not occur in the FRM.

Since the method for producing a metal-coated glass fiber mat of the present invention uses a melt coating method, it does not require a complicated process such as a reduction treatment after coating a metal oxide,
Further, it is possible to apply the metal to each of the glass fiber monofilaments without requiring a large-scale device such as plasma spraying.

Further, since the method for producing a metal-coated glass fiber mat of the present invention uses a method of matting by a spreading method, a metal-coated glass fiber mat which does not use an organic binder continuously and / or efficiently. Can be manufactured.

In the metal-coated glass fiber mat of the present invention, if attention is paid only to the metal portion, the metal has a large surface area per unit weight because it is three-dimensionally stretched in a fiber shape. Moreover, since the contact points are firmly joined, the conductivity is high. On the other hand, since the glass fiber forms the skeleton, compared with the case where only the coated metal material is made into a mat to form a mat. As a side effect, the mat has high rigidity. Taking this property into consideration, when considering application to a current collecting material of a battery, a collector that holds an active material, exchanges electrons with the active material, and efficiently transfers electrons to the positive electrode or the negative electrode terminal. It can be a suitable material as an electric material. For example, in a lead-acid battery, the active material of the battery may be mixed with an electrolytic solution to form a paste, which may be applied to a current collecting material.
In the case of a mat containing only lead fibers, the gap between the fibers is crushed by the pressure applied, and it becomes impossible to apply much active material. In the metal-coated glass fiber mat of the present invention, if lead is selected as the coating metal, the structure is such that the lead fibers are reinforced by the glass fibers, so the gaps between the fibers are unlikely to collapse. Further, since the cross-contact points of the lead fiber portions are connected by lead, electrons can flow more smoothly than simple contact, and the internal loss of battery energy can be reduced.

[0041]

EXAMPLES The present invention will be described in more detail with reference to the following examples. Example 1 Using the apparatus shown in FIG. 4, about 100 glass single fibers having an S glass composition having a diameter of 15 μm and 37% by volume of 37% by volume of aluminum adhered to the continuous metal-coated glass single fibers were rotated for a predetermined time. Then, the drum 18 is stopped from rotating, and the layered bundle of glass fibers is cut in the axial direction of the drum and removed from the drum. The glass fiber layered bundle obtained had a width of about 50 cm, a length of about 240 cm, and a thickness of about 0.7 cm, and the weight thereof was about 5 kg. Some metal-coated glass fibers were taken out from the removed rectangular metal-coated glass fiber layered band and the cross-section was observed to find half-coated fibers as shown in FIG. 1. The amount of aluminum adhering to the glass fibers was About 40% in volume
Met. A metal-coated glass fiber mat was produced from the metal-coated glass fiber layered band using the apparatus shown in FIG.
That is, in FIG. 2, the metal-coated glass fiber layered bundle band 41
Is placed on the spreading table 42 so that the winding direction of the fibers coincides with the direction perpendicular to the paper surface. The metal-coated glass fiber layered bundle band 41 is pulled from the one end thereof by the first moving net 44 to become a spreading sheet 45. At this time, the fiber pressing plate 43 is provided so that the metal-coated glass fiber layered bundle band 41 is fed from the right end in order to have a uniform thickness. The spreading sheet 45 is stretched about 150 times in length as compared with the original metal-coated glass fiber layered bundle band 4, and a layer of the metal-coated glass monofilament extending in one direction and 70- 1
It is a laminated sheet (foamed sheet) having a thickness of about 0.25 mm in which a large number of metal-coated glass monofilament layers extending in the direction intersecting with each other by 10 degrees are alternately laminated.

Subsequently, the expanded cotton sheet 45 is sandwiched by a pair of upper and lower heating rolls 46. The surface temperature of the heating roll 46 is set to 800 ° C., and at the moment when the heating roll 46 is sandwiched between the heating rolls, the aluminum covering the glass fiber is heated to a melting point of 660 ° C. or higher, and the aluminum is in a molten state. 46, the spreading sheet 45 receives a compressive force in its thickness direction, the fibers come into contact with each other at their cross-contacts, and the aluminum covering the glass fibers joins the fibers at the cross-contacts. In addition, before passing through the heating roll, the spread cotton sheet is about 1.
Although it had a thickness of 5 mm, the spread of the expanded cotton sheet was about 0.25 mm due to the pressure applied by the heating roll. The expanded cotton sheet 45 thus heated and pressed is sent out from the heating roll 46, cooled by the cooling air blown out from the cooling nozzle 47, the molten aluminum is solidified, and the fibers are separated from each other. A metal-coated glass fiber mat 48 having a structure in which the contact points are connected with aluminum and having a thickness of about 0.25 mm is completed. The metal-coated glass fiber mat is placed on the second moving net 49 and then wound on the winding drum 50 to be formed into a roll state in order to facilitate the subsequent handling.

When the metal-coated glass fiber mat thus obtained is observed under a microscope, as shown in FIG.
Aluminum (53) connects the cross-contacts (constituting a layer of metal-coated glass monofilament extending in one direction) and the fibers 52 (constituting a layer of metal-coating glass monofilament extending in the direction intersecting by about 70 to 110 degrees). It was observed that it was a spread sheet of metal-coated glass fiber. What appears black in the figure represents the fiber surface not coated with aluminum,
The white appearance represents the surface of the fiber coated with aluminum. Table 1 shows the properties of the obtained metal-coated glass fiber mat.

[0044]

Table 1 ================================ Example 1 Comparative Example --------------- −−−−−−−−−−−−−−−−−−−−− Glass fiber diameter (μm) 15 15 Aluminum attached amount (volume%) 37 37 Unit weight (g / m ² ) 68 70 Organic attached amount (% By weight) 0 4 Binder used Not used Acrylic resin ================================

20 pieces of each of the mats were cut into a size of 50 mm × 50 mm to prepare test samples. 20 pieces of this sample were stacked in a mold of 50 mm × 50 mm × 5 mm heated to 800 ° C., the molten aluminum of 800 ° C. was pressed into the mold at a pressure of 50 MPa, and cooled as it was. A glass fiber reinforced aluminum piece was produced.

When this glass fiber reinforced aluminum test piece was cut into an appropriate size and its cross section was observed, glass single fibers were uniformly distributed in the test piece, and bubbles and poor impregnation of aluminum were observed. There wasn't.

Comparative Example For comparison, a metal-coated glass fiber layered band was prepared under the same conditions as those prepared in Example 1, and an acrylic resin as an organic binder was applied to the metal-coated glass fiber layered band to form fibers and fibers. With a conventional spreading method to bond
A 25 mm cotton mat was produced. Table 1 shows the properties of the mat.

50 mm × 5 as in the case of this mat 1
20 pieces each were cut into a size of 0 mm to obtain test samples. 50mm x 50 which heated this sample to 800 degreeC
20 pieces are piled up in a metal mold of 5 mm x 5 mm and loaded into the metal mold.
A glass melt reinforced aluminum was produced by press-fitting an aluminum melt at 00 ° C. into the mold at a pressure of 50 MPa and cooling it.

When this glass fiber reinforced aluminum test piece was cut into an appropriate size and its cross section was observed, bubbles and impregnation defects, which are considered to be caused by the combustion of the organic binder, were observed in the test piece, and the binder was A black foreign substance that was considered to be carbonized was observed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a metal-coated glass single fiber constituting a mat of the present invention.

FIG. 2 is a side view showing an embodiment of a method for producing a mat according to the present invention.

FIG. 3 is a plan view of a metal-coated glass fiber mat of the present invention, observed under a microscope.

FIG. 4 is a side view showing an apparatus for producing a layered bundle of metal-coated glass fibers.

FIG. 5 is a perspective view showing a method for producing a spread sheet of metal-coated glass fiber.

[Explanation of symbols]

 10 Glass Melting Tank 12 Glass 14 Nozzle 16 Glass Fiber 18 Rotating Drum 20 Molten Metal Retaining Furnace 22 Opening 24 Coating Nozzle 26 Layered Bundle of Glass Fiber 28 Rolled Cotton Sheet 30 Rotating Drum 41 Metal Coated Glass Fiber Layered Band 42 42 Rolling Stand 43 Fiber Pressing Plate 44 First Moving Net 45 Expanded Cotton Sheet 46 Heating Roll 47 Cooling Nozzle 48 Metal Coated Glass Fiber Mat 49 Second Moving Net 50 Winding Drum 51 Fiber 52 Fiber 53 Aluminum

Claims (3)

[Claims] 1. A laminated sheet in which a layer of a metal-coated glass single fiber extending in one direction and a layer of a metal-coated glass single fiber extending in a direction intersecting with the layer are alternately laminated.
A metal-coated glass fiber preform mat for FRM, characterized in that the contact points of the metal-coated glass single fibers are fused with the same metal as the coating metal. 2. The FRM according to claim 1, wherein the coating metal of the metal-coated glass single fiber covers the entire circumference of the glass single fiber.
Metal-coated glass fiber preform mat for use. 3. A plurality of metal-coated glass fibers fed in parallel at a distance from each other are wound around a rotary drum that reciprocates in an axial direction to form a layered bundle band of the metal-coated glass fibers having a predetermined thickness, The layered band is cut in the axial direction of the rotating drum, and the metal-coated glass fiber band is expanded in a direction orthogonal or almost orthogonal to the metal-coated glass fibers to form a long sheet, and the expanded sheet is made of the coated metal. A method for producing a metal-coated glass fiber preform mat for FRM, characterized in that the metal-coated glass fiber preform mat is heated at a temperature equal to or higher than the melting point to fuse the contact points of the metal-coated glass fibers with the coating metal.