JPS6338735A - Reinforcing member for high load transmission belt - Google Patents

Abstract

PURPOSE:To improve transmission efficiency and durability by making thick the density of a molded article and reinforcing the bonding between the sheet layers, in the press molding for a prepreg sheet wound into spiral form. CONSTITUTION:A reinforcing cloth is made of inorganic fiber or organic fiber, and said reinforcing cloth is impregnated with the matrix resin containing thermosetting resin. At least one prepreg sheet 3 is wound into spiral form, and heated and pressed for compression molding. At this time, compression molding is carried out under a pressure over 50kg/cm<2> in order to obtain the fine structure having a fiber volume content of 40-75% or so and a porosity of about 2% or less.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a reinforcing material for high-load power transmission belts with improved transmission efficiency and durability.

(b) Prior Art Conventionally, some high-load power transmission belts have a puffer-shaped reinforcing material attached to one side of the belt. Reinforcing materials for such high-load power transmission belts include ■metal rods, pipes, or plates, or synthetic ↑ {so-called rods, pipes, or plates formed by molding reinforced resin. Things (Machitomo 1959)
(Refer to Publication No. 117937), and ■ one or more,
The rubber 1F air cloth of the layer is made of vL layer (Japanese Patent Application Laid-Open No. 59-16
(Refer to GO51 publication), and further ■Thermosetting... A canvas impregnated with pilgrims is inserted in a spiral shape (Utility Model No. 59-
153749), etc.

(c) Problems to be solved by the invention However, the reinforcing material (2) above has the following problems.

That is, first of all, since the reinforcing material made of the metal rod, pipe, or plate does not have self-lubricating properties, it is necessary to supply lubricating oil to prevent three-tone noise and reduce wear. Yes, this lubricating oil reduces transmission efficiency, and
There are problems such as the lubricating oil scattering and contaminating the surrounding area, and especially when used in food-related applications, the lubricating oil scatters and gets mixed in, causing hygienic problems.

In addition, since metal has a high specific gravity, the weight of the entire belt increases, and the strength of peripheral parts must be increased to cope with the centrifugal force during busy rotation, and there are problems such as reduced durability at high rotation speeds. be.

On the other hand, reinforcing materials made of Imanari YoN or reinforced resin are lightweight and enable dry transmission without using lubricating oil, so they do not have the above-mentioned problems compared to metal reinforcing materials. can be resolved.

However, conventional synthesis + Jf resin or reinforced (kj
N reinforcing material has a relatively coarse structure and relatively low rigidity, so the belt deforms in the width direction, resulting in uneven contact area with transmission wheels such as pulleys, resulting in large transmission losses. There is a problem with this.

Furthermore, among the reinforcing materials in ■ and ■ above, those made of fiber-reinforced resin (FRP) that are laminated or laminated in a spiral shape have higher rigidity than the reinforcing materials made of reinforced resin. Although the highest transmission efficiency can be obtained among these materials, the adhesion between these layers is relatively weak, and
The laminate may break from the glabella due to high loads.
There is a problem with durability under high loads.

(, 1) 'I=Danmoto Original Invention for Solving the Problems The present invention was made in consideration of the above circumstances, and is a reinforcing material for high-load power transmission belts that improves transmission efficiency and durability. The purpose is to provide

The reinforcing material for high-load power transmission belts according to the first invention of the present application has the following advantages: Matrix I containing a thermosetting resin (at least one prepreg sheet impregnated with fat) is spirally wound around a reinforcing cloth made of a fiber or organic fiber, and this is heated and pressurized in a mold. It is characterized in that it is compression molded into a desired cross-sectional shape.

In addition to the object of the first invention, the second invention of the present application also provides for a reduction in the hardness of the reinforcing material due to frictional heat during high loads, and a severe reduction in transmission efficiency due to a reduction in the coefficient of friction accompanying this reduction in hardness. Furthermore, the reinforcing material for high-load power transmission belts is capable of preventing the belt from breaking due to excessive heat generation at high loads and high rotations, and also minimizes the increase in weight. The reinforcing material for high-load power transmission belts according to the second invention comprises: a reinforcing cloth made of inorganic fibers or organic fibers containing a thermosetting resin; l) at least one prepreg sheet impregnated with a resin; 2 and 4 foils are spirally wound, and this is heated and pressurized in a mold to compression mold it into a desired cross-sectional shape.

Furthermore, a third invention of the present application is a reinforcing material for a high-load power transmission belt, which further improves the if abrasion resistance of the reinforcing material in addition to the object of the first invention, the gist of which is as follows: 8!
Thermosetting reinforcement fabric made of LA fiber or organic fiber!
At least 61 prepreg sheets impregnated with matrix UtM containing 41117 and an aramid i-fiber reinforcing cloth superimposed on at least a portion of the inner surface of the winding of the prepreg sheets are spirally wound and molded. It is characterized by being compression-molded into a desired cross-sectional shape by heating and pressurizing it in a mold.

In addition, the fourth invention achieves all of the objectives of the first, second and third inventions above, namely, high transmission efficiency, high wear resistance and durability, with minimal increase in weight. Prevents the hardness of the reinforcing material from decreasing due to frictional heat during high loads, the decrease in transmission efficiency due to the decrease in the rI friction coefficient that comes with this decrease in hardness, and the breakage of the belt due to significant heat generation during high loads and high rotations. This article concerns a reinforcing material for high-grade load transmission belts.

The present invention will be explained in detail below.

The reinforcing fabric used in the present invention is made of inorganic fibers or organic fibers.

The above-mentioned inorganic MILm is not particularly limited, but for example, carbon fiber, glass fiber, quartz T&M
, ceramic fiber, Weiss force, borosilicate a fiber, metal (fiber, rock wool, mineral wool, silicon carbide fiber, asbestos, ceramic fiber, etc.).

Also, there are 8 above! Examples of the a-fiber include, but are not particularly limited to, recycled fibers such as viscose rayon,
Semi-synthetic AA such as acetylcellulose, polyester, polyamide, polyacrylonitrile, acrylonitrile-
Examples include synthetic fibers such as vinyl chloride copolymer, polyvinyl alcohol, polyvinyl chloride, and polyvinylidene chloride, vegetable fibers such as cotton and kapok, and animal fibers such as silk and wool.

The fibers of the reinforcing cloth are not particularly limited, and roving, cloth, mat, etc. can be used, but it is preferable to use cloth, which has the best mechanical strength.

In the case of cloth, the warp and weft should be aligned with the longitudinal direction perpendicular to the winding direction of the reinforcing cloth, and the warp and weft should each intersect with the direction of the reinforcing cloth at a predetermined angle. You can.

In addition, various weaving methods such as plain weaving and satin weaving can be freely adopted as the weaving strength of the cloth. However, in order to increase the rigidity against lateral pressure without increasing the thickness of the reinforcing material, the amount of fibers in the longitudinal direction perpendicular to the winding direction of the reinforcing fabric is set in the same direction as the winding direction of the reinforcing fabric. It is preferable to increase the amount by more than a certain mix in the Fukushima direction. In this case, in the reinforcing cloth, the fibers M1 in the longitudinal direction are
It is preferable that the weight ratio between the amount and the miscellaneous amount of lII in the width direction is from 3:1 to 721, and most preferably, the weight ratio is from 3:1 to 5:1. In the reinforcing fabric, if the ratio of the amount of fibers in the direction facing the parishioners to the amount of fibers in the width direction is less than 3:1, the effect of increasing the stiffness against lateral pressure is poor; : If it exceeds 1, the rg of the reinforcing fabric
If the prepreg sheet becomes too thick, it may be difficult to wind the prepreg sheet the required number of times within a predetermined size. In particular, it is more preferable for this ratio to be in the range of 3=1 to 5:1 since the decrease in compressive strength is relatively small.

In this way, in order to make the amount of fibers in the longitudinal direction of the reinforcing fabric larger than the amount of fibers in the width direction, for example, a woven fabric with a plain weave 9 with a different fiber ratio may be used, or the thickness of the warp may be the same as that of the cotton thread. 2~
It is sufficient to use a woven fabric of Turkish rug ar+ which is 6 times the size.

The reinforcing cloth is impregnated with a U-cross resin containing a thermosetting resin.

The thermosetting resin contained in the matrix resin is not particularly limited, and examples thereof include thermosetting polyester resin, epoxy resin, 7-El TSS m
, polyimide resin, etc.

In order to improve heat dissipation properties, metal powder can be contained in the matrix <H resin in a dispersed state. By increasing the heat dissipation properties of the matrix resin in this way, it is possible to prevent a decrease in the hardness of the belt or the reinforcement material due to frictional heat between the pulley and the belt or reinforcement material, thereby preventing a decrease in transmission efficiency due to the decrease in hardness. At the same time, it is possible to prevent belt breakage due to excessive frictional heat at high loads and high rotations.

The metal powder is not particularly limited, but aluminum, iron, etc., which have excellent thermal conductivity and are inexpensive, can be used, and among them, it is preferable to use aluminum, which has a low specific gravity.

In addition, the particle size of the metal powder is preferably 5 to 500 μI in consideration of dispersibility in the thermosetting resin, and this range includes both large and small particle sizes. More preferred.

The amount of metal powder incorporated into the thermosetting resin is preferably 15 to 100% by volume based on the thermosetting resin.

If it is less than 15% by volume, the heat dissipation effect will be poor, so it is not preferable (and if it exceeds 100% by volume, the heat dissipation effect will reach its limit value, the specific gravity of the thermosetting resin will increase, and the mechanical strength will deteriorate). This is not preferable because it lowers the temperature significantly.

It is also possible to improve wear resistance by incorporating an inorganic filler into the matrix resin in a dispersed manner.

The above-mentioned inorganic fillers may include, but are not limited to, potassium titanate whiskers, graphite carbon powder, high-purity magnesium oxide, etc., in order to avoid damage to pulleys etc. that come into contact with the reinforcing material. It is preferable to use the following.

Among these inorganic fillers, particularly when high purity magnesium oxide is added, high abrasion resistance can be maximized. The amount of this inorganic filler mixed into the thermosetting resin is preferably 10 to 100% by volume based on the thermosetting resin. If it is less than 10% by volume, the effect will be poor and it will not be a good material. On the other hand, if it exceeds 100% by volume, the effect will reach the limit value and the strength will decrease, so it is preferable to impregnate the reinforcing cloth with matrix resin. Methods 1 include a wet method such as coating, spraying, and dipping, and a dry method in which a matrix resin coated on a film or carrier paper is molten and impregnated into the reinforcing cloth. The number of prepreg sheets may be one or more. In the case of multiple prepreg sheets, the type of reinforcing fabric (structure, weaving force, fiber, W type, etc.) of each prepreg sheet may be different (or may be the same.Using multiple prepreg sheets) In some cases, a plurality of prepreg sheets are wound in a spiral shape so that at least a portion of them overlaps each other, so that peeling between the previously wound prepreg sheet and the subsequent prepreg sheet is less likely to occur. f
In order to prevent the formation of steps due to fi folding, there are cases in which multiple prepreg sheets are spirally wound so that the end of one sheet is continuous with the beginning end of another sheet. be. In addition, when winding the prepreg sheet, a
(a) A reinforced synthetic resin (FRP) or a metal core material may be used.

A wound prepreg sheet (first invention) and metal foil (second invention), or a prepreg sheet and a winding of aramid fiber reinforcing cloth overlaid on at least a portion of the inner surface of the winding. (Third invention), as well as a prepreg sheet and a wound product of aramid fiber reinforced cloth and metal foil (fourth invention), which are partially overlapped on the inside surface of this winding (fourth invention), and compressed by heating and pressurizing, respectively. The pressure during molding is such that the #a fiber volume content of the molded product is 40 to 75.
%, preferably about 50 to 60%, and compression molding is preferably performed at a pressure of 50 kg/cI112 or more in order to obtain a dense structure with a porosity of 2% or less. If the pressure is lower than this, the IM and fiber volume content of the molded article will decrease and the porosity will increase, making it impossible to obtain sufficient rigidity, which is not preferable. The heating time, heating temperature, etc. are appropriately selected depending on the type and properties of the thermosetting resin, and if necessary, it is also possible to perform a curing treatment after heating and pressure molding.

By the way, the gold 114m used in the $2 invention of the present application and the tJS4 invention of the present application is not particularly limited, but aluminum foil, body foil, iron foil, etc., which have excellent thermal conductivity and are inexpensive, can be used. Among these, aluminum foil having a small specific gravity is most preferable.

The FI of the metal foil is not limited to 1.Te, but is preferably about 30 to 150 μm. If it is less than 30 .mu.Ill, the effect of increasing heat dissipation will be poor, which is undesirable, and if it exceeds 150 .mu.m, it will be difficult to rotate and the weight will be increased, which is undesirable.

The metal foil is applied to the outer periphery of the wound prepreg sheet, i.e.
The reinforcing material may be configured to be wound around the entire circumference of at least the outermost layer. In this case, in order to more reliably prevent peeling from the prepreg sheet, it is preferable that the starting end of the metal foil is wound inside the ending end of the prepreg sheet.

Alternatively, the entire circumference of at least the outermost layer of the reinforcing material may be constituted by the prepreg sheet layer by winding the metal foil into a wound prepreg sheet.

In this case, in order to enhance the heat dissipation effect, it is preferable to wrap the metal foil between the outermost prepreg sheet layer and the prepreg sheet layer immediately inside it. At this time, in order to prevent the occurrence of peeling along this metal foil, a large number of holes are formed in the gold yC foil, and prepreg sheets on both sides of this gold m foil are formed when compression molding is performed by heating and pressurizing. It is preferable that the two are bonded or fused to each other.

This pore diameter is 0.2 to 3. Om+o is preferred. The pore diameter is
If it falls below this range, the bonding force between the prepreg sheets sandwiching the metal foil becomes small, which may result in a poor peeling prevention effect, which is undesirable.On the other hand, if it exceeds this range, the heat dissipation effect becomes poor, which is not preferable.

Further, although the interval between the holes is related to the hole diameter, it is preferably about 2 to 30 mm. When the hole spacing is less than 2ωm, the heat dissipation effect becomes poor, while when it exceeds 30n+a+, gold 11
．． This is not preferable because the bonding force between the prepreg sheets sandwiching M becomes small and the 2+1 separation prevention effect becomes poor.

Furthermore, the aramid t! used in the third and fourth inventions of the present application! & The fiber-reinforced fabric may be a woven fabric or a non-woven fabric, or may be a mixture of other fibers in order to reduce costs. However, it is most advantageous to use aramid fiber reinforced fabric, which is relatively inexpensive, has good abrasion resistance, and is advantageous in terms of weight reduction, as well as cost reduction.

Note that the thermosetting resin impregnated into the prepreg sheet permeates into the aramid fiber reinforced fabric when it is compressed by heating and pressurizing, so it is not necessarily the case that the thermosetting resin is
Although it is not necessary to impregnate the resin with fat, there is no problem in impregnating it with the thermosetting resin.

(e) Function According to the Pt512 structure of the present invention constructed as described above, the spirally wound prepreg sheet is heated and pressurized in the mold to form the pressure 1!2i. product ia
The R volume content can be increased, and a dense reinforcing material with few voids can be obtained. In this way, the fiber volume content is increased and the fiber is formed into a dense structure, which has the effect of increasing rigidity, durability, and transmission efficiency.

Further, according to the second invention of the present application, the rigidity, durability, and transmission efficiency are improved similarly to the first invention of the present application. Furthermore, the metal foil can effectively dissipate heat generated by friction between the pulley and the belt or the reinforcing material, reducing the hardness of the reinforcing material due to such frictional heat and reducing the coefficient of friction by 1 degree due to this reduction in hardness. This has the effect of preventing a severe drop in transmission efficiency due to this, as well as preventing belt breakage due to significant heat generation during high loads and high rotations.

Furthermore, in order to obtain such heat dissipation properties, it is sufficient to simply add a lightweight metal foil, so that the increase in weight of the reinforcing material can be minimized.

Furthermore, according to the third invention of the present application, the rigidity, durability, and transmission efficiency are improved similarly to the first invention. In addition, abrasion resistant and 17m long aramid fiber reinforced cloth or aramid fiber reinforced cloth is wrapped between the prepreg sheets, so the overall strength of the reinforcing material is excellent. It has the effect of significantly increasing purity.

In addition, according to the fourth invention of the present application, similar to the first invention of the present application, the rigidity, durability, and transmission efficiency are increased, and similarly to the second invention of the present application, heat dissipation is increased and the heat dissipation due to frictional heat is improved. It is possible to prevent a decrease in the hardness of the reinforcing material, a significant decrease in transmission efficiency due to a decrease in the friction coefficient accompanying this decrease in hardness, and furthermore, it is possible to prevent belt breakage due to excessive heat generation at high loads and high rotations. Similarly to the third invention, this has the effect of significantly increasing the wear resistance of the reinforcing material as a whole.

(r) Examples Hereinafter, the present invention will be explained in detail based on Examples, but the present invention is not limited thereto.

[f51 Embodiment (Example 1) of the Invention 1 Hereinafter, an embodiment (Example 1) of the first invention of the present application will be described in detail based on FIGS. 1 to 7.

FIG. 1 is a cross-sectional view of a reinforcing material for a high-load power transmission belt according to an embodiment of the first invention of the present application, FIG. 2 is a perspective view of a high-load power transmission belt using the reinforcing material, and FIG. 1) is a plan view showing the structure of the reinforcing cloth, and No. 31:J(2) is a sectional view showing llHm of the reinforcing cloth, and 'j'+4
FIG. 5 is a perspective view showing the desire to wind the prepreg sheet, and FIG. 5 is a longitudinal sectional view showing the desire to compression mold the wound prepreg sheet by heating and pressurizing it.

This reinforcing material C for high-load power transmission belts is made by winding a prepreg sheet 3 in which a reinforcing cloth 1 is impregnated with a matrix resin 2 containing a thermosetting resin, and inserting this into a pair of upper and lower molds 4a and 4b. Compression molding is carried out by applying pressure at a predetermined pressure and heating and pressing at a predetermined temperature for a predetermined time. After compression molding by heating and pressurizing, a post-curing treatment is performed by heating at a predetermined temperature for a predetermined time.

The reinforcing cloth 1 is not particularly limited, and may be made of, for example, glass fiber, carbon fiber, carbon fiber, silicon carbide (Kuroisoam such as carbon fiber), polyester fiber, synthetic fiber of aramid [!￥f], natural fiber such as brocade, etc. etc., but in this case glass fiber is used.

In addition, for the reinforcing fabric 1, a woven fabric (7Y Lascross) with the least variation in mechanical properties is used.6 The weaving method of the woven fabric is freely selected from known weaving methods such as Ar+, Turkey, Fi Q, etc. However, here, in order to confirm the characteristics of Isogo Kai, which is a real book fishing, we will use Fig. 3 [, 71 (1) and Fig.
A plain weave with a basis weight of 120 OK/In is used as shown in the figure.

The direction of #a fibers of such reinforcing fabric 1 may be determined by winding the warp 1a or weft 11J in the same direction as the winding direction (indicated by arrow A) of the prepreg sheet 3 (as shown in 71). Alternatively, as shown in the flO diagram, the warp 1d or the weft 1b may intersect with the winding direction at a predetermined angle, which is a so-called bias shape.

In addition, as will be described later, in the reinforcing cloth 1, the estimated In in the direction of force perpendicular to the winding direction of the reinforcing cloth 1 is 15.64t H in the width direction, which is the same direction as the winding direction of the reinforcing cloth 1. However, in order to confirm the most basic effect of the present invention, the warp yarns 1a or the weft yarns 1b are arranged in the winding direction of the prepreg sheet 3 (
The direction is the same as that shown by arrow A), and the ratio of weighting of the force direction (a) to the force direction (a) in the width direction is 1:1.

The thermosetting resin contained in the matrix resin 2 is not particularly limited;
resin, polyimide resin, etc. are used. Here, adhesive strength, low amount of shrinkage during curing, dimensional stability, 8! Acid-curing epoxy product with excellent mechanical properties (epoxy equivalent: 4
50) is used.

By the way, as will be described later, it is possible to disperse and mix metal powder and Kuroiso filler in the matrix replacement (fat 2), but here, in order to clarify the difference from a mixture of these , Acid-curing epoxy resin which does not mix these (matrix V (fat 2) is formed with fat.

Methods for impregnating the reinforcing cloth 1 with the matrix resin 2 include known methods such as coating, spraying, dipping, and the like.

Any of these can be employed, but here we are looking for a coating method that is relatively easy to implement.

That is, the matrix a5 is made of the acid-curable Evokin resin dissolved in the melt-resistant material. rf! 2 with mouth H200K/
A prepreg sheet 3 was obtained by coating Vn 2 glass on a flat lily double layer 1 made of fibers, impregnating it, and drying it.

One prepreg sheet 3 obtained in this way has a fourth
As shown in the figure, the reinforcing fabric 1 is spirally wound inward at one winding start end with the warp 1a or the weft 1b facing in the same direction as the winding direction.

When winding the prepreg sheet 3, it is possible to use the core material 5 as shown in FIG. In order to confirm this effect, the prepreg sheet 3 was wound without using the core material 5.

It is advantageous for the core material 5 to be made of a metal with a relatively low specific gravity such as aluminum or a fiber-reinforced resin, in order to reduce the weight of the reinforcing material C.

Reinforcing material Ci: For 1' cases where the change in strength is large, a plurality of prepreg sheets 3 may be used.

In this case, it is advantageous to wrap the winding start end of the prepreg sheet 3 inside at least the last end of one prepreg sheet 3, since this makes it difficult for the prepreg sheets 3 to separate from each other.

As shown in FIG. 5, the wound prepreg sheet 3 is compression-molded by heating and pressurizing it in a pair of upper and lower molds 4a and 4b.

The pressure during heating and pressure molding is 50 kg in order to obtain a dense molded product with a fiber volume content of 40 to 75%, preferably about 50 to 60%, and a porosity of 2% or less. /
It is preferable to set it as cm2 or more.

If the pressure is lower than this, the fiber volume content of the molded article will decrease and the 2-porosity will increase, which is not preferable because the amphoteric property will not be sufficiently enhanced. In this case, 60kg
A pressure of /c1112 is applied.

The heating temperature and time during heating and pressurization may be any temperature and time sufficient to cure the thermosetting resin contained in the matrix resin 2, in this case, the acid-curing epoxy resin; , for 10 minutes at a temperature of 180°C.

After this molding, υI# is completely cured. In this curing process, the density of the molded product has already been achieved through heating and pressure molding, but heating is further performed at a temperature and time sufficient to completely harden the uncured porosity.

That is, in this case, the molded article is heated at a temperature of 200° C. for 20 hours to ensure reliable curing.

The reinforcing material C for high-load power transmission belts obtained as above is
For example, as shown in FIG. 2, they are placed on both sides of a flat bell (B) so as to face each other with the flat bell in between, and are connected to each other by fixing devices F such as through bolts, nuts, and rivet caps.

The bending strength, bending elastic modulus, and compressive strength of the reinforced village C for a high-load power transmission belt obtained in this manner are as shown in Table 1.

(Comparative example) A flat plate made of plus #yasha fiber with a basis weight of 200g/l112,
A plurality of prepreg sheets 3, which are coated with acid-curing type 2 resin dissolved in a solvent and dried in a reinforcing cloth 1 of Shikiwa, are laminated and sandwiched between flat plates (not shown). A comparative example was obtained by molding under the same conditions as in Example 1.

The bending strength, bending elastic modulus, and crushing strength of this comparative example are as shown in Table 1.

(Left below) As is clear from Table 1 in Table 1 and Table 2, when comparing the above example and the comparative example, the force of the above example has a strong bending elastic modulus and compressive strength. It can be seen that it has high rigidity and excellent lateral pressure resistance.

[Embodiment of the first invention (Example 2)] In another embodiment (Example 2) of the first invention of the present application, in the above-mentioned example, vJ of the force direction of the reinforcing cloth 1 is A reinforcing material C for a high-load transmission belt was obtained in the same manner as in Example 1, except that the amount of fiber was greater than the amount of fibers in the width direction.

In this case, in the reinforcing fabric 1, it is preferable that the weight ratio of the amount of N&41 in the force direction (warp direction) to the amount of fiber in the width direction (weft direction) is 3:1 to 7:1, especially It is more preferable that this weight ratio is 3=1 to 5:1.

In this way, in order to make the amount of fibers in the 1"r direction larger than the amount of fibers in the width direction in the reinforcing fabric 1, it is possible to use, for example, a straight woven fabric with a changed fiber ratio. , here, as shown in Figure 8 (1) and Figure 8 (2), the thickness of the warp 1a is 2 to 6 times the thickness of the weft 1b. A reinforcing fabric 1 was used, which is a woven fabric in which the weight ratio of the fiber weight in the weft direction (warp direction) to the 15ME amount in the width direction (weft direction) is 4:1.

The purchase of the pond in this embodiment is the same as in the embodiment described in Section 2, so common explanations will be omitted.

Table 2 shows a comparison of the bending strength, bending elastic modulus, and compressive strength of the thus obtained reinforcing material C for a high-load power transmission belt and the above-mentioned example (Example 1).

(The following is a margin) Table 2 According to Table 2, in the reinforcing cloth, the ratio of the amount of fiber in the direction of force to the amount of fiber in the width direction is 1:1 is used. Compared to the example (Example 1), this example, which uses Turkish satin weave reinforcing cloth, has a higher bending strength and 1 bending elastic modulus, so it has a higher resistance to the lateral pressure of the belt reinforcing material C. It can be seen that the rigidity is high and the pressure resistance is excellent.

[Embodiments of the first invention (Examples 3 to 5) 1 Reinforcing material C for high-load power transmission belts according to each embodiment of the above-mentioned first invention
In a power transmission system that uses a . In light of such high lateral pressure, high-load transmission belts or belt reinforcement C
It is preferable to further increase the durability of: and.

Further, in each of the above Examples, for example, the first herb of the above-mentioned
In another embodiment of the invention (Example 2), the abrasion resistance of the Jilt reinforcing material C (belt or bell) is improved by dispersing and mixing a non-porous filler into the thermosetting resin of the matrix resin 2. is possible.

The inorganic filler is preferably one that does not cause damage to the pulley or the like, and examples thereof include potassium titanate whiskers, graphite carbon powder, and high-purity magnesium oxide. Among these, high-purity magnesium oxide is preferred because it can improve wear resistance the most.

The amount of inorganic filler) is preferably 10 to 100% by volume based on the thermosetting tatmt in the matrix and in the filler. If it is less than 10% by volume, the effect is poor, which is not preferable, and if it exceeds 100% by volume, the effect will reach its limit (soon) and the mechanical strength will decrease, which is not preferable.

Basically, acid-curing epoxy u is used as the matrix fat 2.
(30% by volume of potassium titanate whiskers (Example 3), 30% by volume of graphite carbon (Example 4), or 50% by volume of high-purity magnesium oxide (Example 5) are mixed with the fat. NomaFs7cusQJIJ
Each prepreg sheet 3 is obtained by impregnating different reinforcing cloths 1 with ff2.

Example 2 above using these prepreg sheets 3
Three types of reinforcing materials C for high-load power transmission belts having different components of matrix C1 and fat 2 were obtained in the same manner as above.

The properties of each reinforcing material C for high-load power transmission belts thus obtained are shown in Table 3 in comparison with the reinforcing material C for high-load power transmission belts of Example 2 above. It is recognized from Table 3 that all of these reinforcing materials C for high-load power transmission belts of Examples 3 and 4 have less wear and are superior in abrasion resistance than the reinforcing materials C for high-load power transmission belts of Example 2. It will be done.

Furthermore, it can be seen from Table i3 that the one using 50% by volume of high-purity magnesium oxide has the best wear resistance.

[Another embodiment of the first invention (Example 6) 1 In each of the above embodiments of the first invention of the present application, between the pulley and the bell) B and the belt reinforcing material C during high load and high rotation. Dissipating the frictional heat to the surroundings prevents a decrease in the hardness of the belt or the belt reinforcing material C due to frictional heat, prevents a decrease in transmission efficiency due to a decrease in hardness, and also prevents excessive friction during high loads and high rotations. This is advantageous in preventing belt breakage due to Pl heat.

Therefore, in each embodiment of Honrin's first invention, for example, in Example 2, the matrix tj (m 2 is filled with metal powder as a fraction,
Preferably, they are mixed to increase the heat transfer coefficient and heat dissipation properties of the reinforcing material.

The metal powder is not particularly limited, but aluminum, copper, iron, etc., which have excellent thermal conductivity and are inexpensive, can be used. Here, aluminum powder, which has the lowest specific gravity among these powders, was used in order to be advantageous in terms of weight reduction.

The particle size of the metal powder is preferably 5 to 500 μm in consideration of dispersibility in thermosetting v1, and this range includes both large and small particle sizes. is more preferable. Here, for convenience, the particle size is 10
Aluminum powder in the range ˜50 μm was used.

The amount of metal powder mixed into the thermosetting resin is 15 to 100% for the thermosetting resin, which improves both heat dissipation effect and flash mechanical strength.
Volume % is good.

Here, in order to harmonically achieve the best heat dissipation effect and mechanical strength, a metal powder consisting of 10% by volume of aluminum powder is added to the acid-curing epoxy resin contained in the matrix resin 2. Consists of being dispersed and mixed.

In this way, a matrix (3 (WI
2 in the same reinforcing fabric 1 as in Example 2? 2': Prepreg sheet 3 is obtained.

Using one prepreg sheet 3 obtained in this way, it was heated, pressurized, and compression molded in the same manner as in Example 2 above, and then hardened to form a reinforcing material C for high-load service belts. Obtained.

The properties of the thus obtained reinforcing material C for a high-load power transmission belt are shown in Table 4 in comparison with the properties of Example 2.

As is clear from Table 4, the matrix of metals is used! If you lower it by 1 minute during MWt2, it will stand! It can be seen that the F island conductivity is t. In this way, the heat generated by the matrix 2 (the friction between the pulley and the belt or the belt reinforcing material C) can be effectively dissipated by increasing the heat by mixing two metal powders. This can lead to a decrease in the strength of the belt reinforcing material C due to frictional heat, a decrease in transmission efficiency due to this decrease in strength (2) and a decrease in the transmission efficiency due to the accompanying decrease in the coefficient of friction, and furthermore, a decrease in the belt strength due to significant heat generation at high loads and high rotations. Breakage can be prevented.Furthermore, since only the raw metal powder is added, the increase in weight can be kept relatively small.

[Embodiments of the second invention (Examples 7 to 9)] Figure 99 and Figure 1
An example of the second invention of the present application shown in Figure 0 (Example 7)
In order to improve the heat dissipation of the belt reinforcing material C, gold B = * 6 is wound around the outside of the wrapped prepreg sheet 3, and the outermost periphery of the belt reinforcing material C is The layer is composed of metal foil 6 over the entire circumference.

In this case, the metal foil 6 may be wrapped with its winding start end inside the winding end edge of the prepreg sheet 3 to prevent the metal foil 6 from being rolled from the prepreg sheet 3. In order to make the winding process easier, the metal m6 is started to be wound around the outside of the prepreg sheet 3 after the prepreg sheet 3 is finished 8 times.

The other configurations of the seventh embodiment are the same as those of the second embodiment, so common explanations will be omitted.

In addition, in another embodiment (Embodiment 8) of the second invention of the present application shown in FIGS. 11 and 12, the metal foil 6 is used as a winding of the prepreg sheet 3 in order to improve the heat dissipation property of the belt reinforcing material C. The reinforcing material C is made of a prepreg sheet layer over the entire circumference, and at least the outermost layer of the reinforcing material C is made of a prepreg sheet layer.

In this case, in order to enhance the heat dissipation effect, it is preferable that the three members 6 be located between the outermost prepreg sheet layer and the prepreg sheet layer immediately inside thereof.

The rest of the structure of this Embodiment 8 is the same as that of the above-mentioned Embodiment 2, so a common feature will be omitted.

Furthermore, in another embodiment (Example 9) of book 22 of the book Wff shown in FIGS. 13 and 14, the metal foil 6 is is overlapped and rolled up on the inner surface of the winding of the portion constituting the outermost layer of the prepreg sheet 3, and at least the outermost layer of the belt reinforcing material C is composed of the prepreg sheet a over the entire circumference i. , similar to Example 8 above, but
In order to prevent the prepreg sheet 3 bordering the metal foil 6 from peeling off, the metal foil 6 is formed with a large number of holes 7.

The other configurations of the ninth embodiment are t3 similar to those of the second embodiment, so common explanations will be omitted.

In Examples 7 to 9 above, gold R? FfG is not particularly limited, but metals with good thermal conductivity and inexpensive aluminum foil, copper foil, iron foil, etc. can be used. Here, aluminum foil with the lowest specific gravity is used to advantageously reduce weight.

Although the thickness of the metal foil 6 is not particularly limited, it is preferably set to about 30 to 150 μm from the viewpoint of heat dissipation effect, ease of winding, and avoidance of increased weight. Here, J17 Jz of the metal foil 6 is set to 80 μm, thereby sufficiently increasing heat dissipation performance and making winding work relatively easy.

Also, gold! The number of turns of the J4 foil 6 is not limited to one turn, but may be two or more turns.

In the above embodiment 9, when compression molding is performed by heating and pressurizing, the prepreg sheets 3 on both sides of the single metal foil 6 are welded or fused to each other through the holes 7, so that peeling along the metal foil 6 is prevented. This will definitely be prevented.

In the above Example 9, the hole diameter of the hole 7 formed in the gold a foil 6 is preferably 0.2 to 3.01 nm, and here 1.0 I
It is considered to be III11. If the diameter of the hole 7 is less than the second range 11, the combined force of the prepreg sheets 3 sandwiching the metal foil 6 becomes small, and the effect of preventing peeling becomes poor, which is not preferable.
Exceeding this range is not preferable because the effect of increasing heat dissipation becomes poor.

In addition, in Example 9, the interval between the holes 7 is related to its diameter, but approximately 2 to 30 mm is good, and here, 5T
It is designated as Q111.

Table 4 shows the characteristics of the high-load power transmission bell) Jll reinforcing material C of each Example of the second invention of the present τ obtained in this way, in comparison with the characteristics of Example 2 and Example 6.

From Table 4, it can be seen that the reinforcing materials C for high-load power transmission belts of each Example of the second invention have higher thermal conductivity than the reinforcing materials C for high-load power transmission belts of Implementation Side 2 of the first invention and Example 6. In particular, it is recognized that the heat dissipation effect is the greatest in the above-mentioned Example 7 in which the outermost layer is made of metal foil 6 (5).By winding the metal foil 6 together with the prepreg sheet 3 in this way, the belt As a result, the heat generated by friction between the pulley and the belt reinforcing material C or the belt reinforcing material C can be effectively dissipated. What)? , a decrease in the strength of the belt reinforcing material C due to frictional heat, and a significant decrease in transmission effectiveness due to a decrease in the coefficient of friction that accompanies this decrease in strength;
Furthermore, it is possible to prevent breakage of the bell (B) due to excessive heat generation at high loads and high rotations.

In addition, in order to obtain such heat dissipation properties, it is sufficient to simply add the heavy gold Y4 foil 6, so that the increase in the weight of the reinforcing material C can be minimized.

[Example 10 of the third invention 1 The reinforcing material C for a high-load power transmission belt according to an example (actual example 10) of the third invention of the present application shown in FIGS. 15 and 16 is
In order to improve the abrasion resistance of the reinforcing material C, an aramid 41 at reinforcing cloth 8 is used as shown in FIG. was wound around at least a portion of the inner surface of the prepreg sheet 3, heated and pressurized and compression molded in the same manner as in each of the above embodiments.

The position at which the aramid fiber reinforcing cloth 8 is wound is not particularly limited, and for example, the aramid fiber reinforcing cloth 8 can be wound around the entire circumference of at least the outermost layer of the prepreg sheet 3. As the 57 lamid fiber reinforced cloth 8, it is possible to use aramid sensibility!t!!li strong cloth, a blended reinforced cloth of aramid fibers and other fibers, aramid fiber reinforced cloth, etc. Aramid fiber 7.1 strong fabric is used, which has sufficient a117 abrasion resistance, has a small specific gravity of 1.1, and is inexpensive.

Aramid 15. ML reinforcing cloth 8 (this may be impregnated with the same matrix resin 2 as the prepreg sheet 3, but the matrix resin 2 of the prepreg sheet 3 may be impregnated with the aramid fiber reinforcing cloth 8 during compression molding by heating and pressurizing. ,
It is not necessary to include the matrix t7 ('M2?2) in advance.Of course, the aramid fiber reinforced cloth 8
It goes without saying that the matrix υIN2 may be impregnated in advance.

The configuration of the pond is the same as that of the second embodiment, so common explanations will be omitted.

The characteristics of the reinforcing material C for a high-load power transmission belt according to Example 10 obtained in this way were determined by the implementation side 2 of the first invention of the present application.
-5 compared to fPI3 table.

From the third friend, it can be seen that the high-load power transmission belt reinforcing material C according to Example 10 has a wear resistance of "2" because the amount of wear is smaller than that of Example 2. .

(The following is a blank space) [The high-load power transmission bell according to an embodiment of the invention (Example 11) 1 is shown in FIGS. 17 and 13. ; j2 Village C is a prepreg sheet 3 similar to the above Example 2, an aramid fiber reinforcing cloth 8 similar to the J Binary Example 10, and a metal foil 6 similar to the above Examples 7 to 1 wound. As in Example 1,
It can be obtained by preforming, heating and pressing, and then completely curing.

The prepreg sheet 3, which is the valley component, is explained in Examples 1-6 above, the metal foil 6 is explained in Examples 7-9, and the aramid fiber reinforced fabric 8 is explained in Example 10 above. As explained in Example 1 above, the complete hardness after heating, pressurizing and shrink molding is as explained in Example 1 above.
These explanations will be omitted here to avoid duplication.

In this Embodiment 11, the metal foil 6 is rolled up so as to be superimposed on the inner surface of the aramid fiber reinforcing cloth 8, which is superimposed on the inner surface of the outermost layer of the prepreg sheet 3. However, it is also possible to wrap the metal foil 6 on the outside after the prepreg sheet 3 and the aramid fiber reinforcing cloth 8 have been wound.

Table 5 shows the characteristics of the reinforcing material C for a high-load power transmission belt according to Example 11 obtained in this manner in comparison with that of Example 2.

(Leaving space below) Table 5 From Table 5, it can be seen that the reinforcing material C for high-load transmission belts according to Example 11 is the reinforcing material C for high-load power transmission belts according to Example 2.
It can be seen that the abrasion resistance and thermal conductivity are superior to that of the above.

B) Effects of the Invention As described above, according to the reinforcing material for high-load power transmission belts of the first invention of the present application, the density of the molded product is made dense by the pressure applied during molding, and the density of the molded product is made dense (2. The bond between the layers of the prepreg sheet wound around the sheet is strong, so the rigidity is high.
Lateral pressure resistance is increased. As a result, the durability and transmission efficiency of the reinforcing material or the belt to which it is coupled are enhanced.

Further, according to the reinforcing material for a high-load power transmission belt of the :52 invention of the present application, in addition to the effect of the first invention, heat dissipation is enhanced by the metal foil, so that the hardness of the reinforcing material is reduced by frictional heat during high AM. It is possible to prevent a decrease in transmission efficiency due to a decrease in hardness and a decrease in hardness, and also to prevent belt breakage due to excessive frictional heat in high load/high rotation (2) and (7).

Furthermore, according to the agent and material for high-load service belts according to the 32nd aspect of the present application, in addition to the effects of the first invention, the aramid fiber reinforcing fabric improves the abrasion resistance of the belt reinforcing material. This has the effect of further increasing the durability of the belt, the reinforcing material, or the belt to which it is tied.

Furthermore, according to the reinforcing material for a high-load transmission F4H belt according to the fourth invention of the present application, in addition to the effects of the first invention, the aramid; It is possible to further increase the durability of the belt reinforcement material or the belt to which it is bonded.The heat dissipation is increased by the metal foil, so the belt reinforcement due to frictional heat during high loads is reduced. In addition to preventing a decrease in the hardness of the material and a decrease in transmission efficiency due to this decrease in hardness, it is also effective in preventing belt breakage due to excessive frictional heat during high loads and high rotations.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a reinforcing material for a high-load power transmission belt according to an embodiment (Example 1) of the first invention of the present application, FIG. 2 is a perspective view of the high-load power transmission belt, and FIG. 1) is a plan view showing the reinforcing fabric group n, and FIG. 3(2) is a plan view showing the reinforcing fabric set 11.
1 is a perspective view showing the desire to wind the prepreg sheet, and FIG. 5 is a RwIr side view showing the procedure for heating and pressurizing the wound prepreg sheet.
Fig. 6 is a perspective view showing the procedure for winding the prepreg sheet of the pond, Fig. 7 is a vertical cross-sectional view of a modification of the above-mentioned embodiment, Pt
Figure 58 (1) is a plan view showing the structure of the reinforcing cloth of the embodiment of the first invention of the present application, Figure 8 (2) is a sectional view showing the set n of the reinforcing cloth, and Figure 9 is the 10 is a cross-sectional view of a reinforcing material for a high-load power transmission belt according to an embodiment (Example 7) of the invention; FIG. 10 is a perspective view showing a request for winding the prepreg sheet and fl; 4 foil; FIG. The figure is the second edition of Honnigen n.
A sectional view of the reinforcing material for high load (transmission bell) according to the embodiment (Example 8) of the pond of the invention, FIG. 14 is a cross-sectional view of a reinforcing material for a high-load power transmission belt according to another embodiment (Example 9) of the second invention of the present application, and FIG. 14 is a perspective view showing the procedure for winding the prepreg sheet and metal foil. FIG. 15 is an embodiment of the 32nd light of the present application (Embodiment 10)
Cross-sectional view of 7171 reinforced material (high-load transmission bell), No. 16
The figure is a perspective view showing the procedure for winding the prepreg sheet and the aramid fiber reinforcing cloth, and Figure 17 is a diagram showing the reinforcing material for high-load power transmission belts according to the -'X 1m example (Example 10) of the fjS4 invention of the present application. The sectional view and FIG. 18 are perspective views showing the desire to wind the prepreg sheet, aramid fiber reinforced cloth, and metal foil. 1... Reinforcement cloth, 1a... Warp, 1b... Weft, 2
...Matrix resin, 3...Prepreg sheet,
・! a, 4b... Z type, 6... Metal foil, 7... Hole, 3... Aramid fiber reinforced cloth. Patent issue MA, Nitto Electric Industry Co., Ltd.]... Soft j Shikigai 1';! L... - Tsumeko, 1b... 4 boats, 2... Mad "], Kusuno Tsukihiro 3 --- F1 riff, Shiri° foot 4a, 4b... All jigs Figure 5, 1 piece 6 figure

Claims (70)

[Claims] (1) At least one prepreg sheet impregnated with a matrix resin containing a thermosetting resin is spirally wound around a reinforcing cloth made of inorganic or organic fibers, and this is heated and processed in a mold. A reinforcing material for high-load power transmission belts that is compressed and molded into the desired cross-sectional shape. (2) The reinforcing material for a high-load power transmission belt according to claim 1, which is formed by compression molding by heating and pressurizing at a pressure of 50 kg/cm^2 or more. (3) In the reinforcing cloth, the amount of fibers in the longitudinal direction perpendicular to the winding direction is greater than the amount of fibers in the width direction, which is the same direction as the winding direction of the reinforcing cloth. 2
Reinforcing material for high-load power transmission belts as described in . (4) The reinforcing material for a high-load power transmission belt according to claim 3, wherein the weight ratio of the amount of fibers in the longitudinal direction to the amount of fibers in the width direction of the reinforcing cloth is 3:1 to 7:1. (5) High load transmission according to claim 3 or 4, wherein the reinforcing cloth has a weight ratio of fiber content in the longitudinal direction to fiber content in the width direction of 3:1 to 5:1. Reinforcement material for belts. (6) The reinforcing material for a high-load power transmission belt according to any one of claims 1 to 5, wherein the reinforcing fabric is made of a woven fabric of Turkish satin weave. (7) The reinforcing material for a high-load power transmission belt according to any one of claims 1 to 6, wherein the matrix resin contains a thermosetting resin and metal powder dispersed therein. (8) Matrix resin is 15 to 15% relative to thermosetting resin
The reinforcing material for a high-load power transmission belt according to claim 7, which contains 100% by volume of metal powder. (9) The reinforcing material for a high-load power transmission belt according to claim 7 or 8, wherein the metal powder is aluminum powder. (10) The reinforcing material for a high-load power transmission belt according to any one of claims 7 to 9, wherein the metal powder has a particle size of 5 to 500 μm. (11) The reinforcing material for a high-load power transmission belt according to any one of claims 1 to 10, wherein the matrix resin contains a thermosetting resin and an inorganic filler dispersed therein. (12) The reinforcing material for a high-load power transmission belt according to claim 11, wherein the inorganic filler is high-purity magnesium oxide. (13) Matrix resin is 10% relative to thermosetting resin
The reinforcing material for a high-load power transmission belt according to claim 11 or 12, which contains ~100% by volume of an inorganic filler. (14) Reinforced cloth made of inorganic or organic fibers,
At least one prepreg sheet impregnated with a matrix resin containing a thermosetting resin and metal foil are spirally wound, and this is heated and pressurized in a mold to compression mold it into a desired cross-sectional shape. A reinforcing material for high-load power transmission belts. (15) The reinforcing material for a high-load power transmission belt according to claim 14, wherein the metal foil is made of aluminum foil. (16) The reinforcing material for a high-load power transmission belt according to claim 14 or 15, wherein the metal foil has a thickness of 30 to 150 μm. (17) The reinforcing material for a high-load power transmission belt according to any one of claims 14 to 16, wherein at least the outermost layer is made of metal foil over the entire circumference. (18) Claim 17, in which the winding start end of the metal foil is wound inside the winding end end of the prepreg sheet.
Reinforcing material for high-load power transmission belts as described in . (19) The reinforcing material for a high-load power transmission belt according to any one of claims 14 to 16, wherein at least the outermost peripheral layer is composed of a prepreg sheet layer over the entire circumference. (20) The reinforcing material for a high-load power transmission belt according to any one of claims 14 to 19, wherein a large number of holes are formed in the metal foil. (21) The diameter of each hole formed in the metal foil is 0.2 to 3.
The reinforcing material for a high-load power transmission belt according to claim 20, which has a thickness of 0 mm. (22) The distance between each hole formed in the metal foil is 2 to 30 mm.
A reinforcing material for a high-load power transmission belt according to claim 21. (23) The reinforcing material for a high-load power transmission belt according to any one of claims 14 to 22, which is formed by compression molding by heating and pressurizing at a pressure of 50 kg/cm^2 or more. (24) In the reinforcing cloth, the amount of fibers in the longitudinal direction perpendicular to the winding direction is greater than the amount of fibers in the width direction, which is the same direction as the winding direction of the reinforcing cloth. The reinforcing material for a high-load power transmission belt according to any one of Item 23. (25) The reinforcing material for a high-load power transmission belt according to claim 24, wherein the weight ratio of the amount of fibers in the longitudinal direction to the amount of fibers in the width direction of the reinforcing cloth is 3:1 to 7:1. (26) The reinforcing material for a high-load power transmission belt according to claim 25, wherein in the reinforcing cloth, the weight ratio of the amount of fibers in the longitudinal direction to the amount of fibers in the width direction is 3:1 to 5:1. (27) The reinforcing material for a high-load power transmission belt according to any one of claims 14 to 26, wherein the reinforcing cloth is made of a woven fabric of Turkish satin weave. (28) The reinforcing material for a high-load power transmission belt according to any one of claims 14 to 27, wherein the matrix resin contains a thermosetting resin and metal powder dispersed therein. (29) Matrix resin is 15% compared to thermosetting resin
The reinforcing material for a high-load power transmission belt according to claim 28, which contains metal powder in an amount of 100% by volume. (30) The reinforcing material for a high-load power transmission belt according to claim 28 or 29, wherein the metal powder is aluminum powder. (31) The reinforcing material for a high-load power transmission belt according to any one of claims 28 to 30, wherein the metal powder has a particle size of 5 to 500 μm. (32) The reinforcing material for a high-load power transmission belt according to any one of claims 14 to 31, wherein the matrix resin contains a thermosetting resin and an inorganic filler dispersed therein. (33) The reinforcing material for a high-load power transmission belt according to claim 32, wherein the inorganic filler is high-purity magnesium oxide. (34) Matrix resin is 10% relative to thermosetting resin
The reinforcing material for a high-load power transmission belt according to claim 32 or 33, which contains ~100% by volume of an inorganic filler. (35) Reinforcing cloth made of inorganic or organic fibers,
At least one prepreg sheet impregnated with a matrix resin containing a thermosetting resin and an aramid fiber reinforcing cloth overlaid on at least a portion of the inner surface of the prepreg sheet are spirally wound. A reinforcing material for high-load power transmission belts that is compression-molded into the desired cross-sectional shape by heating and pressurizing it in a mold. (36) The reinforcing material for a high-load power transmission belt according to claim 35, wherein the aramid fiber reinforcing fabric is a nonwoven fabric. (37) The reinforcing material for a high-load power transmission belt according to claim 35 or 36, which is formed by compression molding by heating and pressurizing at a pressure of 50 kg/cm^2 or more. (38) In the reinforcing cloth, the amount of fibers in the longitudinal direction perpendicular to the winding direction is greater than the amount of fibers in the width direction, which is the same direction as the winding direction of the reinforcing cloth. The reinforcing material for a high-load power transmission belt according to any one of Item 37. (39) The reinforcing material for a high-load power transmission belt according to claim 38, wherein the weight ratio of the amount of fibers in the longitudinal direction to the amount of fibers in the width direction of the reinforcing cloth is 3:1 to 7:1. (40) High load transmission according to claim 38 or 39, wherein the reinforcing cloth has a weight ratio of fiber content in the longitudinal direction to fiber content in the width direction of 3:1 to 5:1. Reinforcement material for belts. (41) The reinforcing material for a high-load power transmission belt according to any one of claims 35 to 40, wherein the reinforcing fabric is made of a woven fabric of Turkish satin weave. (42) The reinforcing material for a high-load power transmission belt according to any one of claims 35 to 41, wherein the matrix resin contains a thermosetting resin and metal powder dispersed therein. (43) Matrix resin is 15% compared to thermosetting resin
The reinforcing material for a high-load power transmission belt according to claim 42, which contains metal powder in an amount of 100% by volume. (44) The reinforcing material for a high-load power transmission belt according to claim 42 or 43, wherein the metal powder is aluminum powder. (45) The reinforcing material for a high-load power transmission belt according to any one of claims 42 to 44, wherein the metal powder has a particle size of 5 to 500 μm. (46) The reinforcing material for a high-load power transmission belt according to any one of claims 35 to 45, wherein the matrix resin contains a thermosetting resin and an inorganic filler dispersed therein. (47) The reinforcing material for a high-load power transmission belt according to claim 46, wherein the inorganic filler is high-purity magnesium oxide. (48) Matrix resin is 10% relative to thermosetting resin
The reinforcing material for a high-load power transmission belt according to claim 46 or 47, which contains ~100% by volume of an inorganic filler. (49) Reinforcing cloth made of inorganic or organic fibers,
At least one prepreg sheet impregnated with a matrix resin containing a thermosetting resin, an aramid fiber reinforcing cloth superimposed on at least a portion of the inner surface of the winding of the prepreg sheet, and metal foil are spirally wound. This reinforcing material for high-load power transmission belts is made by compression-molding it into the desired cross-sectional shape by heating and pressurizing it in a mold. (50) The reinforcing material for a high-load power transmission belt according to claim 49, wherein the metal foil is an aluminum foil. (51) The reinforcing material for a high-load power transmission belt according to claim 49 or 50, wherein the metal foil has a thickness of 30 to 150 μm. (52) The reinforcing material for a high-load power transmission belt according to any one of claims 49 to 51, wherein at least the outermost layer is made of metal foil over the entire circumference. (53) Claim 52, in which the winding start end of the metal foil is wound inside the winding end end of the prepreg sheet.
Reinforcing material for high-load power transmission belts as described in . (54) The reinforcing material for a high-load power transmission belt according to any one of claims 49 to 51, wherein at least the outermost layer is made of a prepreg sheet layer over the entire circumference. (55) The reinforcing material for a high-load power transmission belt according to any one of claims 52 to 54, wherein a large number of holes are formed in the metal foil. (56) The diameter of each hole formed in the metal foil is 0.2 to 3.
The reinforcing material for a high-load power transmission belt according to claim 55, which has a thickness of 0 mm. (57) The distance between each hole formed in the metal foil is 2 to 30 mm.
A reinforcing material for a high-load power transmission belt according to claim 55 or 56. (58) The reinforcing material for a high-load power transmission belt according to any one of claims 49 to 57, wherein the aramid fiber reinforcing fabric is a nonwoven fabric. (59) The reinforcing material for a high-load power transmission belt according to any one of claims 49 to 58, which is formed by compression molding by heating and pressurizing at a pressure of 50 kg/cm^2 or more. (60) In the reinforcing cloth, the amount of fibers in the longitudinal direction perpendicular to the winding direction is greater than the amount of fibers in the width direction, which is the same direction as the winding direction of the reinforcing cloth. 59. The reinforcing material for a high-load power transmission belt according to any one of Item 59. (61) The reinforcing material for a high-load power transmission belt according to claim 60, wherein in the reinforcing cloth, the weight ratio of the amount of fibers in the longitudinal direction to the amount of fibers in the width direction is 3:1 to 7:1. (62) The high-load power transmission belt according to claim 59 or 60, wherein the reinforcing fabric has a weight ratio of fiber content in the longitudinal direction to fiber content in the width direction of 3:1 to 5:1. reinforcement material. (63) The reinforcing material for a high-load power transmission belt according to any one of claims 49 to 62, wherein the reinforcing cloth is made of a woven fabric of Turkish satin weave. (64) The reinforcing material for a high-load power transmission belt according to any one of claims 49 to 63, wherein the matrix resin contains a thermosetting resin and metal powder dispersed therein. (65) The matrix resin is 15% compared to the thermosetting resin.
65. The reinforcing material for a high-load power transmission belt according to claim 64, which contains metal powder in an amount of 100% by volume. (66) The reinforcing material for a high-load power transmission belt according to claim 64 or 65, wherein the metal powder is aluminum powder. (67) The reinforcing material for a high-load power transmission belt according to any one of claims 64 to 66, wherein the metal powder has a particle size of 5 to 500 μm. (68) Claim 49, wherein the matrix resin contains a thermosetting resin and an inorganic filler dispersed therein.
The reinforcing material for a high-load power transmission belt according to any one of Items 67 to 67. (69) The reinforcing material for a high-load power transmission belt according to claim 68, wherein the inorganic filler is high-purity magnesium oxide. (70) Matrix resin is 10% relative to thermosetting resin
The reinforcing material for a high-load power transmission belt according to claim 68 or 69, which contains ~100% by volume of an inorganic filler.