JPH03202322A - Hybrid prepreg and its manufacture - Google Patents

Abstract

PURPOSE:To improve the ball-hitting feeling and the impact resistance, etc., of the shaft of a golf club when a prepreg is sued as said shaft, while the mechanical strength thereof is heightened by a method in which in the carbon fiber arranged in one direction, boron fiber and the fiber different from said two fibers are arranged in the same direction as that of the carbon fiber, thereby producing a hybrid prepreg. CONSTITUTION:The fibers 8 of different kinds may be also a plurality of kinds, and the metallic fiber such as titanium fiber or stainless steel fiber is preferably used, but the inorganic fiber such as glass fiber or the organic fiber of various kinds may be also used. The diameter of the fiber is set in 50-150mum, and then the diameter of the fiber is small, the fiber is used in the form of fiber bundle. In hybrid prepreg 1, boron fiber 6 and the fiber 8 of different kind are arranged at a prescribed distance in the same direction as that of carbon fiber 2 between two prepregs reinforced with the carbon fiber in one direction, and are integrally formed by pressing and/or heating, thereby producing the hybrid prepreg remarkably preferably. As matrix resin, epoxy resin or other thermosetting resin may be used, and curing agent and other addition agent are suitably added thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. The present invention provides carbon fibers, boron fibers, metal fibers different from these fibers, such as titanium fibers, amorphous fibers, stainless steel fibers, glass fibers, and other inorganic fibers. The present invention relates to a hybrid prepreg having one or more types of other different types of fibers selected from various organic fibers as reinforcing fibers, and a method for manufacturing the same.

[Bundling 1] In recent years, prepregs using carbon fibers as reinforcing fibers have been widely used in various technical fields.For example, prepregs that are lightweight and have high mechanical strength are used in the manufacture of golf shafts and fishing rods. For this reason, it is widely used and has achieved very good results.

However, in terms of strength and modulus of elasticity, it is desired to increase flight distance and improve stickiness, especially for golf shafts, and in order to meet these demands, carbon fiber reinforced prepregs are being used between carbon fiber reinforced prepregs. A method of using boron fibers as reinforcing fibers, which is different from reinforcing fibers, has been proposed.
A lot of research is being carried out for this purpose.

Currently, as a hybrid prepreg for this purpose, one having a configuration as shown in FIG. 12 has been proposed and is in use.

That is, the hybrid prepreg shown in FIG. 12 is formed by arranging boron fibers 6 different from the carbon fibers 2 at equal intervals on the prepreg 4 using the carbon fibers 2 as reinforcing fibers.

Although such a hybrid prepreg can be easily produced and can achieve improved mechanical strength and increase flight distance in golf shafts, etc., the bonding between the prepreg 4 and the boron fiber 6 is insufficient. However, in some cases, the desired mechanical strength may not be fully exhibited, which is a problem.

Furthermore, recently, especially when used in golf shafts, etc., good feel during use (hitting feeling) and impact resistance are required.

Further, the diameter of the boron fiber 6 is large, and therefore, the thickness of the hybrid prepreg must also be generally large, and there is also the problem that it is difficult to provide a thin hybrid prepreg.

As a result of many research experiments to solve these problems, the present inventors found that in addition to carbon fiber and boron fiber as reinforcing fibers in hybrid prepreg, fibers different from these fibers, such as titanium fiber, amorphous fiber, By incorporating one or more types of other different types of fibers selected from metal fibers such as stainless steel fibers, glass fibers, other inorganic fibers, various organic fibers, etc. as reinforcing fibers, the hybrid prepreg can be made into a golf shaft. It has been found that when used in applications such as golf balls, the feel during use (hitting feeling) and impact resistance are improved without reducing mechanical strength or flight distance.

The present invention has been made based on this new knowledge.

Therefore, an object of the present invention is to be able to improve physical properties such as tensile strength and elastic modulus compared to conventional hybrid prepregs, and in particular to improve mechanical strength and flight distance when used for golf shafts. without reducing
Improved feel during use (hitting feel) and impact resistance,
Another object of the present invention is to provide a hybrid prepreg that can provide a thin prepreg and a method for manufacturing the same.

Furthermore, as will be explained in detail later, another object of the present invention is to provide a hybrid prepreg in which various reinforcing fibers are arranged without any disturbance in the longitudinal direction, the prepreg has good mechanical properties, and is aesthetically pleasing. An object of the present invention is to provide a manufacturing method.

The above objects are achieved by the hybrid prepreg and method for producing the same according to the present invention. In summary, the present invention includes carbon fibers arranged in one direction as reinforcing fibers, and boron fibers and one or more types of different fibers different from the boron fibers and carbon fibers, arranged in the same direction as the carbon fibers. This is a hybrid prepreg characterized by being arranged in the following manner.

Such a hybrid prepreg according to the present invention has boron fibers arranged in the same direction as the carbon fibers, and boron fibers and carbon fibers arranged in the same direction as the carbon fibers, by two unidirectional carbon fiber reinforced prepregs using carbon fibers as reinforcing fibers. Suitably manufactured by a manufacturing method characterized by sandwiching and integrating one or more types of different fibers,
In particular, this can be achieved efficiently using a drum winder.

In other words, the hybrid prepreg according to the present invention has (a
) on the circumference of a drum with a given diameter.

Step (b) of winding a unidirectional carbon fiber reinforced prepreg using carbon fiber as a reinforcing fiber so that the arrangement direction of the carbon fibers is aligned in the circumferential direction of the drum. a step of winding boron fibers and one or more types of different fibers different from the boron fibers and carbon fibers at a constant pitch on the peripheral surface; (c) in a state of being wound around the drum or from the drum; In the removed state, further cover the surface of the unidirectional carbon fiber reinforced prepreg in which the boron fibers and different types of fibers are aligned, and add another unidirectional carbon fiber reinforced prepreg using carbon fibers as reinforcing fibers. It is suitably manufactured by a manufacturing method characterized by having a step of overlapping the drums so that the arrangement direction of the drums is aligned in the circumferential direction of the drum.

Furthermore, according to another manufacturing method of the present invention, a long hybrid prepreg having the configuration according to the present invention described above can be easily manufactured.

In other words, one manufacturing method according to the present invention includes boron fibers and one or more types of different fibers different from the boron fibers and carbon fibers in carbon fibers arranged in one direction as reinforcing fibers. A method for manufacturing a long hybrid prepreg arranged in the same direction as carbon fibers, the method comprising: (a)
Boron fibers and one or more types of different types of fibers different from the boron fibers and carbon fibers are arranged at predetermined intervals and continuously supplied; (b) the boron fibers and the different types of fibers are sandwiched; (c) continuously supplying first and second carbon fiber-reinforced prepregs each held on a release paper and made of carbon fibers as reinforcing fibers along with the boron fibers and the different types of fibers; The first carbon fiber-reinforced prepreg with release paper, the boron fiber and different fibers, and the second carbon fiber-reinforced prepreg with release paper have a thickness of 0.7 to 0 of the total thickness of the first and second carbon fiber-reinforced prepreg with release paper.
．． The viscosity of the matrix resin in the first and second carbon fiber reinforced prepregs is 100%.
This is a method for producing a long hybrid prepreg, which is characterized by heating until it reaches 0 to 50,000 cp.

According to another invention, boron fibers and one or more types of different fibers different from the boron fibers and carbon fibers are added to the carbon fibers arranged in one direction as reinforcing fibers. A method for manufacturing a long hybrid prepreg arranged in the same direction, the method comprising: (a) boron fibers and one or more types of different fibers different from the boron fibers and carbon fibers arranged at predetermined intervals so as to be continuous; (b) continuously supplying the carbon fibers opened by the opening means from both sides of the boron fibers and the different types of fibers together with the boron fibers and the different types of fibers; (c) the above-mentioned (d) continuously supplying the first and second resin-coated papers along with the boron fibers, the different types of fibers, and the carbon fibers in such a manner that the boron fibers, the different types of fibers, and the carbon fibers are sandwiched; Resin-coated paper, boron fibers, different types of fibers, carbon fibers, and second resin-coated paper are integrated by pressurizing and heating, and the boron fibers, different types of fibers, and carbon fibers are coated with the first and second resin-coated papers. A method for manufacturing a long hybrid prepreg is provided, which is characterized by impregnating a matrix resin therein.

X Yutaka 1 Next, the hybrid prepreg and the manufacturing method thereof according to the present invention will be explained in more detail with reference to the drawings.

FIG. 1 shows an embodiment of a hybrid prepreg 1 according to the present invention. According to this embodiment, in the hybrid prepreg 1, boron fibers 6 and different fibers 8 different from the boron fibers 6 and the carbon fibers 2 are arranged in the carbon fibers 2 arranged in one direction as reinforcing fibers. are arranged in the same direction. Although the boron fibers 6 and the different types of fibers 8 are arranged alternately in this embodiment, the arrangement method of the boron fibers 6 and the different types of fibers 8 is not limited to this, and can be arranged in any desired manner. It can be done.

The boron fibers 6 and the different fibers 8 are preferably located at the center of the unidirectional carbon fiber prepreg 4 as shown in FIG. Even if they are arranged unevenly, the same effect can be achieved.

Further, according to the present invention, the different types of fibers 8 contained in the hybrid prepreg 1 do not need to be one type, but can be a plurality of types, for example, 2.3 types of different types of different types of fibers. For example, FIG. 3 shows an embodiment in which the different types of fibers 8 include two different types of different types of fibers 8a and 8b.

In this way, the different types of fibers 8 include a plurality of types of different types of fibers 8a,
8b, multiple types of different types of fibers 8a and 8b may be arranged between the boron fibers 6 as shown in FIG.
Furthermore, as shown in FIG. 4, a plurality of different types of fibers 8a and 8b may be alternately arranged with the boron fiber 6 as a reference. The arrangement relationship between the different types of fibers 8 (8a, 8b) and the boron fibers 6 may be arbitrarily selected as desired, as described above.

The boron fiber 6 used in the present invention usually has a fiber diameter of 5.
0 to 150 μm is used, preferably 70 to 1 μm.
It is assumed to be 20 μm.

The different types of fibers 8 include titanium fibers, amorphous fibers,
Metal fibers such as stainless steel fibers are preferably used, and the diameter of such fibers is usually between 50 and 150 LLm, preferably between 70 and 120 μm.

Furthermore, according to the present invention, the different types of fibers 8 include glass fibers, other inorganic fibers such as alumina fibers, silicon carbide fibers, and silicon nitride fibers, or various organic fibers such as aramid fibers, polyarylate fibers, and polyethylene fibers. Fibers can also be used.

However, these fibers f generally have a small fiber diameter, that is, a monofilament diameter (d) of 5 to 50 ILm. As shown in the figure, it is used in the form of a strand (fiber bundle) in which a large number of fibers f are bundled.

Therefore, metal fibers with small fiber diameters are used in the form of strands.

Different types of fibers in the form of such strands 8
In this specification, the converted diameter D0 shown by the following formula is used as the fiber diameter.

D0=rτ・d n: Number of convergent strands d: Fiber diameter Also, when such a strand is used as the dissimilar fiber 8, regardless of whether it is twisted or not, as shown in FIG.
In the hybrid prepreg 1, it does not exist in the form of a circular cross section with a reduced diameter D0, but is normally deformed into a flattened state. Therefore, as described above, the hybrid prepreg 1 has the same thickness (T) as when titanium fibers, amorphous fibers, stainless steel fibers, etc. with large fiber diameters are used as the different fibers 8.
In order to manufacture , the fiber diameter when the strand is used as the dissimilar fiber 8, that is, the converted diameter Do, is at most 5001.
Preferably, it is Lm.

For example, when 300 organic fibers such as polyarylate fibers have a fiber diameter d of 23 μm, the converted diameter D0 is 398 μm, and the fiber diameter d is 13 μm.
By converging 800 glass fibers, the converted diameter D0 is 368 μm, and both of these strands are also suitably used as the different fibers 8 to produce the hybrid prepreg 1 as shown in FIG. can do.

The hybrid prepreg I constructed according to the present invention can be produced by various methods, but in particular, boron fibers and different types of fibers are interposed between two unidirectional carbon fiber reinforced prepregs using carbon fibers as reinforcing fibers. It is very suitably manufactured by arranging carbon fibers in the same direction at predetermined intervals and integrating them by pressing and/or heating.

To explain further, as shown in FIG.
The carbon fibers 2 of the first carbon fiber reinforced prepreg 4A are placed on the first carbon fiber reinforced prepreg 4A having carbon fibers 2 having a fiber diameter of 5 to 30 Ij, m.
Boron fibers 6 and different fibers 8 having a fiber diameter of 50 to 500 μm, which is larger than that of carbon fibers, are arranged in the same direction as the arrangement direction of carbon fibers, and the boron fibers 6 and the different fibers are The second carbon fiber reinforced prepreg 8 is held in the same release paper 10 as the first carbon fiber reinforced prepreg 4A.
The first carbon fiber reinforced prepreg 4A, the boron fibers 6 and the dissimilar fibers 8 are obtained by overlapping the carbon fiber reinforced prepregs 4B and pressing and/or heating the segmented fiber reinforced prepregs 4A and 4B toward each other. The second carbon fiber-reinforced prepregs 4B are then joined together to form a hybrid prepreg l according to the present invention as shown in FIGS. 1 to 4, FIG. 6, and the like.

The carbon fibers 2 as the reinforcing fibers of the first and second carbon fiber reinforced prepregs 4A and 4B may be the same carbon fiber, or may be carbon fibers with different strengths. The carbon fiber 2 usually has a fiber diameter of 5 to 30 tons as described above.
Lm, preferably 6 to 12 μm.

As the matrix resin, thermosetting matrix resins such as epoxy resin, unsaturated polyester resin, polyurethane resin, diallyl phthalate resin, and phenol resin can be used. Further, a curing agent and other imparting agents, such as a flexibility imparting agent, are appropriately added so that the curing temperature is 50 to 500°C.

To give a preferred example, epoxy resin is preferred as the matrix resin, and usable epoxy resins include (1) glycidyl ether epoxy resin (
Bisphenol A%F.

S-based epoxy resin, novolac-based epoxy resin, brominated bisphenol A-based epoxy resin); (2) Cycloaliphatic epoxy resin; (3) glycidyl ester-based epoxy resin; (4) glycidylamine-based epoxy resin;
5) Heterocyclic epoxy resin: One or more types selected from various other epoxy resins are used, and bisphenol A, F, and S glycidylamine-based epoxy resins are particularly preferably used. Further, as the curing agent, diaminophenyl sulfone (DDS), diaminodiphenylmethane (DDM), etc. are preferably used.

Further, the blending ratio of carbon fiber, boron fiber, different type of fiber, and matrix resin in the hybrid of the present invention can be adjusted arbitrarily, but in general, carbon fiber: boron fiber:
Different types of fibers: matrix resin = (30-75):
(2-15) : (2-15)= (25-4
0). Further, according to the present invention, the thickness (T) of the prepreg can be made to be about the same as the fiber diameter of the boron fibers and different fibers used, but it is usually 80 to 200 mm.
It will probably be on the order of μm.

Furthermore, the hybrid prepreg according to the present invention
It can also be manufactured by the method illustrated in the figure.

That is, carbon fibers 2, boron fibers 6, and different types of fibers 8 are arranged at predetermined intervals and in a predetermined arrangement on the first coated paper 14A coated with matrix resin 12, and then the various reinforcing fibers 2.6. The hybrid prepreg 1 according to the present invention is produced by covering the second coated paper 14B coated with the matrix resin 12 and then heating and pressurizing both coated papers.

Furthermore, the hybrid prepreg 1 according to the present invention can be manufactured very suitably in a drum winery.

That is, in FIG. 9, a drum 2 having a predetermined diameter
A unidirectional carbon fiber reinforced prepreg 4A using carbon fibers 2 as reinforcing fibers and held on a release paper 10 as shown in FIG. At this time, the arrangement direction of the carbon fibers 2 is arranged in the circumferential direction of the drum 20. Next, the boron fibers 6 and the different types of fibers 8 are supplied to the drum 20 from the bobbin 24 via the traverse device 26, and are placed on the drum 20, that is,
Carbon fiber reinforced prepreg 4A wrapped around the drum
It is wrapped at a certain pitch on top of the

Next, the surface of the unidirectional carbon fiber reinforced prepreg 4A in which the boron fibers 6 and the different types of fibers 8 are aligned is covered with a second unidirectional carbon fiber held on the release paper 10, as shown in FIG. The fiber-reinforced prepreg 4B is stacked on the surface of the drum 20 so that the fiber direction is aligned in the circumferential direction, and is joined to the first carbon fiber-reinforced prepreg 4A with boron fibers 6 and different fibers 8 sandwiched therebetween. , a hybrid prepreg 1 having a configuration according to the present invention is formed.

Note that as an alternative method, the second carbon fiber reinforced prepreg 4
B is a method in which boron fibers 6 and different types of fibers 8 are arranged on the first carbon fiber reinforced prepreg 4A, which is removed from the drum and then superimposed, and if necessary, passed through a hot roller or the like. You can also do it.

First and second carbon fiber reinforced prepregs 4A, 4 used
B has the same configuration, with a thickness of 65 mm on the release paper 10.
It was formed in μm. The carbon fibers 2 as reinforcing fibers were PAN-based carbon fibers (manufactured by Toshi Co., Ltd., trade name: rM40J) with a fiber diameter of 6.5 μm, and the matrix resin was an epoxy resin. Further, the content of matrix resin was 33% by weight.

As the boron fiber 6, a fiber diameter of 11001 L is used, and as the dissimilar fiber 8, a strand of 300 polyarylate fibers (pectran) with a fiber diameter of 23 μm is used. They were arranged at intervals of 2 mm.

The hybrid prepreg 1 manufactured in this way is
Width 300mm, length 1.7m, thickness (T) 160ILm
A hybrid prepreg was obtained. The blending ratio of carbon fibers, boron fibers, different types of fibers, and matrix resins in the hybrid prepreg of this example is 54% by weight: carbon fibers: boron fibers; different types of fibers: matrix resins
:2:17:27.

In addition, the mechanical strength and other properties of such hybrid prepreg were measured, and although the hybrid prepreg 1 according to the present invention is thin, both compressive strength and elastic modulus are low.
It is superior to the conventional hybrid prepreg shown in Figure 12, and has improved feel (hitting feel) and impact resistance, especially when used in golf shafts, etc., without reducing mechanical strength or flight distance. It was improved and aesthetically pleasing.

Table 1 shows hybrid prepregs produced according to the above method using different types of different fibers 8 and their evaluation results.

Next, a method for manufacturing a long hybrid prepreg 1 according to the present invention will be described with reference to the drawings.

FIG. 10 shows an embodiment of a manufacturing apparatus for carrying out the method for manufacturing a long hybrid prepreg 1 according to the present invention.

In this example, first and second carbon fiber reinforced prepregs 4A and 4B using carbon fibers 2 as reinforcing fibers are held in a release paper 10 and are placed in an unwinder (unwinding section) in the form of a winding roll. ) 32A, 32B. The carbon fiber reinforced prepregs 4A and 4B with release paper pulled out from the unwinding parts 32A and 32B are attached to the press roll 34.
It is sent between A and 34B.

On the other hand, the boron fibers 6 and the different types of fibers 8 are placed on the press roll 3 while being arranged parallel to each other at a predetermined interval within the - plane.
4A, 34B, and therefore, the release paper-coated carbon fiber reinforced prepregs 4A, 4B drawn out from the unwinding portions 32A, 32B contain boron fibers 6 and dissimilar fibers 8.
The boron fibers 6 and the different types of fibers 8 pass between the press rolls 34A and 34B in such a manner that they are sandwiched between them.

The first and second carbon fiber-reinforced prepregs 4A and 4B pass through press rolls 34A and 34B with boron fibers 6 and different fibers 8 sandwiched between them, and then pass through a hot plate 36 and a second stage press roll. 38A, 38
Passed to B.

In this process, the boron fiber 6 and the different fibers 8 are
The first and second carbon fiber reinforced prepregs 4A, 4B are embedded and impregnated into the carbon fiber reinforced prepregs 4A, 4B.
In addition, a hybrid fiber-reinforced composite resin layer 4 in which the boron fibers 6 and different types of fibers 8 are integrated is formed.

Next, both front paper patterns with the hybrid fiber-reinforced composite resin layer 4 sandwiched therebetween are cooled by a cooling means (not shown) such as a cold plate, and then, in this example, only the upper release paper 10 is fiber-reinforced by a winder 50. It is peeled off from the composite resin layer 4. A cover film 54 supplied from an unwinder 52 is attached to the surface of the fiber-reinforced composite resin layer 4 adhering to the lower release paper 10, and then wound up in a winder 56 as a hybrid prepreg product.

According to the manufacturing method of this example, in the manufacturing apparatus with the above configuration,
Press rolls 34A, 34B and/or 38A, 38B
The interval is set to a thickness of 0.7 to 0.8 times the total thickness of the first and second carbon fiber reinforced prepregs 4A and 4B with release paper, and the hot plate 36
The first carbon fiber reinforced prepreg 4A, 4B was heated so that the viscosity of the matrix resin in the carbon fiber reinforced prepregs 4A and 4B was 1,000 to 50,000 cp.
And the second carbon fiber reinforced prepregs 4A and 4B are heated. As a result, the boron fibers 6 and the different types of fibers 8 are very suitably buried and impregnated into the matrix resin layers of the first and second carbon fiber reinforced prepregs 4A and 4B, and the first and second carbon fiber reinforced prepregs 4A and 4B are impregnated with each other. 4B, the boron fibers 6 and the different fibers 8 were found to be integrated. If the setting conditions are not met, the boron fibers 6 and the different fibers 8 will be replaced by the first and second carbon fiber reinforced prepregs 4A, 4B.
In addition, the carbon fibers 2, boron fibers 6, and different fibers 8 may not be properly aligned in the longitudinal direction. The bonding interface between 4A and 4B was not sufficiently fused, and peeling was sometimes observed at this bonding interface later.

In the manufacturing apparatus of the above embodiment, a long hybrid prepreg according to the present invention is continuously and efficiently manufactured.

The manufacturing method of the above embodiment will be described in more detail with numerical values as follows.

The first and second carbon fiber reinforced prepregs 4A and 4B using carbon fiber 2 as reinforcing fibers had the same configuration, and were formed to a thickness of 65 μm on a release paper 10 of 120 μm thick. .

The carbon fiber 2 used was a PAN-based carbon fiber (manufactured by Toshi Co., Ltd., trade name: rM40J) with a fiber diameter of 6.5 μm, and the matrix resin used was an epoxy resin. Further, the content of matrix resin in the prepreg was 35% by weight.

The boron fibers 6 used had a fiber diameter of 100 μm, and the different types of fibers 8 used titanium fibers with a fiber diameter of 1100 IL, and the boron fibers 6 and the different types of fibers 8 were arranged at an interval of 2 mm.

Press rolls 34A, 34B and 38A.

38B is 300 μm, which is 0.00 μm of the total thickness of the first and second carbon fiber reinforced prepregs 4A and 4B with release paper.
It was set to be 8 times thicker. Also, the hot plate 36 has 1
The viscosity of the matrix resin in the first and second carbon fiber reinforced prepregs 4A and 4B is 200°C.
It was 0 cp.

In this way, a long hybrid prepreg l having a width of 300 mm could be continuously manufactured at a manufacturing speed of 3 m/min.

Carbon fiber in the hybrid prepreg of this example,
The blending ratio of boron fibers, different types of fibers, and matrix resin is
In terms of weight percent, carbon fiber: boron fiber: different type of fiber: matrix resin = 62:2.7:4.3:31.

In addition, the mechanical strength and other properties of such hybrid prepreg were measured, and the hybrid prepreg according to the present invention was superior to the conventional hybrid prepreg shown in FIG. 12 in both compressive strength and elastic modulus despite being thinner. In particular, when used in golf shafts, etc., the feel (hitting feeling) and impact resistance during use are improved without reducing mechanical strength or flight distance, and it is aesthetically pleasing. Ta.

FIG. 11 shows another embodiment for manufacturing a long hybrid prepreg 1.

In this embodiment, the boron fibers 6 and the different types of fibers 8 are supplied between the press rolls 34A and 34B while being arranged parallel to each other at a predetermined interval within the plane. The carbon fibers 2 used as reinforcing fibers are opened by a spreading means 60 such as a series of spreading bars, and then
The opened carbon fibers 2 are continuously supplied from both sides of the boron fibers 6 and the different types of fibers 8 to between the press rolls 34A and 34B together with the boron fibers 6 and the different types of fibers 8.

Further, first and second resin-coated papers 14, which are formed by applying matrix resin 12 to release paper 10, are attached to unwinders (unwinding portions) 32A and 32B in the form of winding rolls. The resin-coated paper 14 pulled out from the unwinding sections 32A and 32B is rolled onto press rolls 34A and 34 in such a manner that the boron fibers 6, different types of fibers 8, and carbon fibers 2 are sandwiched therebetween.
It is sent to between B.

Therefore, the resin-coated paper 14 pulled out from the unwinding sections 32A and 32B is arranged in such a manner that the boron fibers 6, the different types of fibers 8, and the carbon fibers 2 are sandwiched between them. 2, press rolls 34A, 34B
It will pass between.

The first and second resin-coated papers 14 pass through press rolls 34A and 34B with boron fibers 6, different types of fibers 8, and carbon fibers 2 sandwiched between them, and then are rolled and then passed through a hot plate 36 and a second stage. It is then passed through two press rolls 38A, 38B. In this process, the boron fibers 6, different types of fibers 8, and carbon fibers 2 are embedded and impregnated into the matrix resin 12 of the first and second resin-coated papers 14.
, a hybrid fiber-reinforced composite resin layer 4 in which carbon fibers 2, boron fibers 6, and different types of fibers 8 are integrated is formed.

Next, the double-ridge pattern paper with the hybrid fiber-reinforced composite resin layer 4 sandwiched therebetween is cooled by a cooling means (not shown) such as a cold plate, and then, in this example, only the upper release paper 10 is fiber-reinforced by a winder 50. It is peeled off from the composite resin layer 4. A cover film 54 supplied from an unwinder 52 is attached to the surface of the fiber-reinforced composite resin layer 4 adhering to the lower release paper 10, and then wound up in a winder 56 as a hybrid prepreg product.

According to this embodiment, in the manufacturing apparatus having the above configuration, the distance between the press rolls 34A, 34B and/or 38A, 38B is 0.7 to 0.0 of the total thickness of the first and second resin coated paper 14.
．． The hot plate 36 is set to be 8 times thicker, and the hot plate 36 is
Matrix resin 1 in the first and second resin coated paper 14
It is preferable to heat the first and second resin-coated papers 14 so that the viscosity of the first and second resin-coated papers 14 becomes i ooo to 50,000 cp.

As a result, the boron fibers 6, different types of fibers 8, and carbon fibers 2 are added to the matrix resin 12 of the first and second resin-coated papers 14.
The matrix resin 12, the carbon fibers 2, the boron fibers 6, and the different fibers 8 of the first and second resin-coated papers 14 are integrated. By selecting such setting conditions, the alignment in the longitudinal direction of the carbon fibers 2, boron fibers 6, and different types of fibers 8 is not disturbed, and in particular, the boron fibers 6 and different types of fibers 8 are aligned in the center of the matrix resin layer. can be suitably entered into. Furthermore, the bonding interfaces of the matrix resins 12 of the first and second resin-coated papers 14 can be sufficiently fused, and no peeling will occur from this bonding interface later.

With the manufacturing apparatus of the above embodiment, hybrid prepreg can be manufactured continuously and efficiently.

The manufacturing method of the above embodiment will be described in more detail with numerical values as follows.

The first and second coated papers 14 used had the same structure, and were coated with epoxy resin to a thickness of 35 μm on a release paper 10 having a thickness of 120 μm. The carbon fiber 2 as a reinforcing fiber is PA with a fiber diameter of 6.5 μm.
N-based carbon fiber (manufactured by Toshi Co., Ltd.: product name rM40J)
were used, and 53 fibers were arranged in parallel on each side of the boron fiber and the foreign fiber. The carbon fibers were uniformly opened in the width direction by the opening means 60 and arranged at a uniform density over a width of 300 mm.

The opening means 60 is composed of a normal opening bar, and in this embodiment, three stainless steel bars 62 each having a diameter of 30 mm are arranged in parallel at an interval of 60 mm, and the cutting bars are arranged in a wavy manner. The fibers were opened by passing a strand under a tension of 500 g/l.

As the boron fiber 6, a fiber diameter of 100 μm was used, and as the different type of fiber 8, a stainless steel fiber with a fiber diameter of 100 μm was used, and the boron fiber 6 and the different type of fiber 8 were arranged with an interval of 1 mm. .

The distance between the press rolls 34A, 34B and 38A, 38B was 3.0 mm, and the thickness was set to be 0.8 times the total thickness of the first and second coated paper 14. Further, the hot plate 36 was heated to 100° C., and the viscosity of the matrix resin in the first and second coated papers 14 was 2000 cp.

In this way, a long hybrid prepreg 1 having a width of 300 mm could be continuously manufactured at a manufacturing speed of 3 m/min.

Carbon fiber in the hybrid prepreg of this example,
The blending ratio of boron fibers, different types of fibers, and matrix resin is
In weight percent, carbon fiber: boron fiber: different fiber: matrix resin = 55:5:13:27.

In addition, the mechanical strength and other properties of such hybrid prepreg were measured, and although the hybrid prepreg manufactured in this example was thinner, both the compressive strength and elastic modulus were higher than that of the conventional hybrid shown in Fig. 12. Superior to prepreg, especially when used in golf shafts, etc., without reducing mechanical strength or flight distance.
Improved feel during use (hitting feel) and impact resistance,
It was also aesthetically pleasing.

Since the hybrid prepreg according to the present invention is configured as described above, it can improve physical properties such as mechanical strength, and is thinner than conventional hybrid prepregs. Despite this, it has excellent compressive strength and elastic modulus, and especially when used in golf shafts, it improves the feel (hitting feeling) and impact resistance without reducing mechanical strength or flight distance. It has the feature of being aesthetically pleasing. Furthermore, according to the manufacturing method of the present invention, carbon fibers, boron fibers, and different types of fibers are arranged without disturbance in the fiber length direction, and a hybrid prepreg with good mechanical properties and aesthetically pleasing properties can be obtained. It has the advantage of being able to provide

[Brief explanation of drawings]

1 to 4 are cross-sectional configuration diagrams of a hybrid prepreg according to the present invention. FIG. 5 is a cross-sectional view of a strand showing one form of dissimilar fibers used in the present invention. FIG. 6 is a cross-sectional configuration diagram of another embodiment of the hybrid prepreg according to the present invention. FIGS. 7 and 8 are cross-sectional views illustrating a method for manufacturing a hybrid prepreg according to the present invention. FIG. 9 is a perspective view illustrating a preferred method of manufacturing a hybrid prepreg according to the present invention. FIGS. 10 and 11 are cross-sectional configuration diagrams illustrating a method of manufacturing another embodiment of the hybrid prepreg according to the present invention. FIG. 12 is a cross-sectional configuration diagram of a conventional hybrid prepreg. 1: Hybrid prepreg 2: Carbon fiber 4.4A, 4B = Carbon fiber reinforced prepreg 6: Boron fiber 8: Different type of fiber 14: First and second resin coated paper 34A%B, 38A, B Nibbles roller 36: Hot plate 60 : Clean the drawing of the opening means! (No change in content) Figure 1 Figure 2 Figure 4 Figure 3 Figure 5 Figure f Figure 8 Figure 9 Figure 7] O Procedural amendment (voluntary) February 28, 1990

Claims (1)

[Claims] 1) In carbon fibers arranged in one direction as reinforcing fibers,
A hybrid prepreg characterized in that boron fibers and one or more kinds of different fibers different from the boron fibers and carbon fibers are arranged in the same direction as the carbon fibers. 2) Two unidirectional carbon fiber reinforced prepregs using carbon fibers as reinforcing fibers, boron fibers arranged in the same direction as the carbon fibers, and one or more types different from the boron fibers and carbon fibers. A method for producing a hybrid prepreg characterized by sandwiching and integrating different types of fibers. 3) (a) Wrap a unidirectional carbon fiber-reinforced prepreg using carbon fibers as reinforcing fibers around the circumferential surface of a drum having a predetermined diameter so that the arrangement direction of the carbon fibers is aligned in the circumferential direction of the drum. Step (b) Wrapping boron fibers and one or more types of different fibers different from the boron fibers and carbon fibers at a constant pitch on the circumferential surface of the unidirectional carbon fiber reinforced prepreg wound around the drum. step, (c) in the state of being wound around the drum or in the state of being removed from the drum, further covering the surface of the unidirectional carbon fiber reinforced prepreg in which the boron fibers and different types of fibers are aligned; A method for producing a hybrid prepreg, comprising the step of superimposing another unidirectional carbon fiber reinforced prepreg using as reinforcing fibers such that the arrangement direction of the carbon fibers is aligned in the circumferential direction of a drum. 4) Carbon fibers arranged in one direction as reinforcing fibers,
A method for producing a long hybrid prepreg in which boron fibers and one or more types of different fibers different from the boron fibers and carbon fibers are arranged in the same direction as the carbon fibers, the method comprising: (a) boron fibers and , arranging and continuously supplying one or more types of different fibers different from the boron fibers and carbon fibers at predetermined intervals; (b) sandwiching the boron fibers and the different types of fibers;
(c) continuously supplying first and second carbon fiber-reinforced prepregs each held by a release paper and made of carbon fibers as reinforcing fibers along with the boron fibers and different types of fibers; (c) the release paper; The first carbon fiber-reinforced prepreg, boron fibers and different fibers, and the second carbon fiber-reinforced prepreg with release paper have a thickness of 0.7 to 0.8 of the total thickness of the first and second carbon fiber-reinforced prepreg with release paper. Pressed to double the thickness, and the viscosity of the matrix resin in the first and second carbon fiber reinforced prepregs is 1000 to 50000 cp.
A method for producing a long hybrid prepreg, characterized by heating until it becomes . 5) Carbon fibers arranged in one direction as reinforcing fibers,
A method for producing a long hybrid prepreg in which boron fibers and one or more types of different fibers different from the boron fibers and carbon fibers are arranged in the same direction as the carbon fibers, the method comprising: (a) boron fibers and , arranging and continuously supplying the boron fiber and one or more different types of fibers different from the carbon fibers at a predetermined interval; (b) the carbon fibers opened by the opening means to the boron fibers; and (c) supplying the first and second resin-coated papers together with the boron fibers and the different types of fibers from both sides of the different types of fibers, (c) in such a manner that the boron fibers, the different types of fibers, and the carbon fibers are sandwiched. The boron fiber,
(d) The first resin-coated paper, the boron fibers, the different fibers, the carbon fibers, and the second resin-coated paper are heated under pressure to be integrated. and the boron fiber, the dissimilar fiber, and the carbon fiber are
and impregnating a second resin-coated paper with a matrix resin.