JP6955345B2 - Stab vest and stab vest - Google Patents

Description

The present invention relates to a blade-proof plate and a blade-proof clothing using the blade-proof plate.

In agricultural work applications, manufacturing sites such as machining, it is necessary to protect the worker's body from cutlery or similar sharp metal parts, and moreover, the body directly from the cutlery like police officers and guards. There are occupations that need to be protected. For this reason, various blade-proof materials and blade-proof products have been conventionally proposed.

Patent Document 1 describes an invention of a protective fiber material having excellent wearing comfort and a method for producing the same. According to claim 1, a core wire obtained by arranging a stranded wire obtained by twisting a plurality of high-strength fibers of a metal wire or a plastic wire and coating a thermoplastic resin in parallel at intervals is arranged in parallel to form a warp core material layer. A core wire whose angle is different from the alignment direction of the warp core material layer is aligned on this in parallel at intervals to form a weft core material layer, and the warp core material layer and the weft core material layer are heat-sealed. The invention of the protective fiber material integrally formed by the above is described.

Patent Document 2 describes an invention relating to a blade-proof material having excellent blade-proof properties, weight reduction, and flexibility.
Claim 1 has a flat surface layer portion in which short fibers of high-performance fibers and ultrafine fibers derived from the short fibers are entangled and further adhered to each other, and an inner layer portion in which the short fibers are entangled with each other. Described is an invention of a blade-proof material in which a plurality of non-woven fabrics having a sandwich structure in which both sides of the inner layer portion are sandwiched are laminated.
It is described that aramid fibers can be used as high-performance fibers of the non-woven fabric constituting the blade-proof material (0027), and that a glass fiber sheet can also be used in combination (0029).

In addition, Patent Document 3 describes the invention of a blade-proof glove, and Patent Document 4 describes an invention of a blade-proof / protective neck guard.

Japanese Unexamined Patent Publication No. 2014-189912 Japanese Unexamined Patent Publication No. 2010-156094 Japanese Unexamined Patent Publication No. 2009-209474 Japanese Unexamined Patent Publication No. 2008-196084

An object of the present invention is to provide a blade-proof plate that is difficult for a sharp metal object such as a blade to penetrate, and if it penetrates, it is difficult to pull out the blade-proof plate, and a blade-proof clothing using the blade-proof plate.

The present invention is a blade-proof plate formed by compression molding a resin-impregnated fiber bundle.
The resin-impregnated fiber bundle is integrated by impregnating 100 parts by mass of (A) a bundle of fiber materials with (B) 25 to 300 parts by mass of a thermoplastic resin, and has a length (L) of 10. It is a flat shape with a cross-sectional shape of ~ 50 mm and a cross-sectional shape in the width direction having a major axis and a minor axis (major axis length> minor axis length).
The average length (D1) of the major axis is 0.5 to 4.0 mm.
The average flatness ratio (D1 / D2) obtained from the average length (D1) of the major axis and the average length (D2) of the minor axis is 1.0 to 8.0.
Provided are a blade-proof plate having a ratio of L to D1 (L / D1) of 10 to 50, and a blade-proof clothing using the blade-proof plate.

Since the blade-proof plate of the present invention has high impact resistance, it has a high protective effect against sharp metal objects such as blades.

(A) is a conceptual diagram showing the dispersed state of the fiber material in the blade-proof plate (compression molded product) of the example, and (b) is the dispersed state of the fiber material in the blade-proof plate (injection molded product) of the comparative example. Conceptual diagram to show. The front view for demonstrating the test method of the impact resistance test using the deformation DuPont impact tester. However, the modified DuPont impact tester is shown in a simplified form. It is sectional drawing for demonstrating the impact resistance test of an Example, (a) is the figure which shows the state which the conical tip part of the hitting heart has not penetrated, (b) is the state which the cone tip part of a hitting heart has completely penetrated The figure which shows. (A) is a diagram (photograph) of a state corresponding to FIG. 3 (b) of Example 1, and (b) is a diagram (photograph) corresponding to FIG. 3 (b) of Example 2. It is sectional drawing for demonstrating the impact resistance test of the comparative example, and is the figure which shows the state which the conical tip portion of the center of gravity has completely penetrated. (A) is a diagram (photograph) of a state corresponding to FIG. 5 of Comparative Example 1, and (b) is a diagram (photograph) corresponding to FIG. 5 of Comparative Example 2.

<Resin-impregnated fiber bundle>
The resin-impregnated fiber bundle used in the blade-proof plate of the present invention is integrated by impregnating 100 parts by mass of the bundle of the fiber material of the component (A) with 25 to 300 parts by mass of the thermoplastic resin of the component (B). It is a thing.

Known inorganic fibers and organic fibers can be used as the bundle of the fiber material of the component (A), but those selected from carbon fibers, glass fibers, and aramid fibers are preferable from the viewpoint of impact resistance and weight reduction. ..
The number of fiber materials constituting the bundle of fiber materials is adjusted in consideration of the outer diameter (major axis length and minor axis length) of the resin-impregnated fiber bundle, and is, for example, from the range of 100 to 30,000. You can choose.

Examples of the thermoplastic resin of the component (B) include polyamide resin (polyamide 6, polyamide 66, polyamide 12, etc.), olefin resin (polypropylene, high-density polyethylene, acid-modified polypropylene, etc.), polyphenylene sulfide resin, polyester (polyethylene terephthalate, poly). Butylene terephthalate, etc.), thermoplastic urethane resin (TPU), polyoxymethylene resin (POM), ABS resin, polycarbonate resin, alloy of polycarbonate resin and ABS resin, and the like can be used.
As the thermoplastic resin of the component (B), an alloy composed of two or more kinds can also be used, and in that case, an appropriate compatibilizer can also be contained.
As the component (B), an olefin resin is preferable, and polypropylene is more preferable.

The content ratio of the component (A) and the component (B) is 25 to 300 parts by mass, preferably 35 to 200 parts by mass of the component (B) with respect to 100 parts by mass of the component (A). Yes, more preferably the component (B) is 40 to 150 parts by mass, and even more preferably the component (B) is 40 to 100 parts by mass.

The resin-impregnated fiber bundle can contain a known resin additive, depending on the intended use. Examples of the resin additive include flame retardants, heat stabilizers, light stabilizers, colorants, antioxidants, antistatic agents, lubricants and the like.

The resin-impregnated fiber bundle has a flat shape having a major axis and a minor axis (major axis length> minor axis length) in the cross-sectional shape in the width direction.
The average length (D1) of the major axis of the resin-impregnated fiber bundle is 0.5 to 4.0 mm, preferably 0.5 to 2.0 mm, and more preferably 0.5 to 1.5 mm.
The average flatness ratio (D1 / D2) obtained from the average length (D1) of the major axis and the average length (D2) of the minor axis of the resin-impregnated fiber bundle is 1.0 to 8.0, and 1.5 to 8.0. 5.0 is preferable.
The length (L) of the resin-impregnated fiber bundle is 10 to 50 mm, preferably 15 to 40 mm.
The ratio of L to D1 (L / D1) is 10 to 50, preferably 20 to 50.
Resin-impregnated fiber bundle, the bulk density is preferably 0.1 to 0.4 g / cm ^3, more preferably 0.1 to 0.3 g / cm ^3, more preferably 0.1 to 0.2 g / cm ^3.
As long as the problem of the present invention can be solved, a small amount of a resin-impregnated fiber bundle having a circular cross-sectional shape in the width direction can be contained. The ratio of the circular resin-impregnated fiber bundle to the total amount of the resin-impregnated fiber bundle is preferably 10% by mass or less, more preferably 5% by mass or less, still more preferably 3% by mass or less.

As a method for producing a resin-impregnated fiber bundle, a method using a crosshead die is known. Japanese Patent Application Laid-Open No. 2012-52093 (Examples 1 to 9), Japanese Patent Application Laid-Open No. 2012-131104 (Production of resin-impregnated glass long fiber bundle of Production Example 1) Production, Production of Resin Impregnated Carbon Fiber Long Fiber Bundle of Production Example 2), Japanese Patent Application Laid-Open No. 2012-131918 (Production of Resin Impregnated Carbon Fiber Bundle of Production Example 1, Production of Resin Impregnated Glass Fiber Bundle of Production Example 2), It can be produced according to the methods described in JP-A-2011-162905 (Example 1) and JP-A-2004-14990 (Examples 1 to 7).
In order to obtain the above-mentioned flatness ratio of the resin-impregnated fiber bundle, the method of adjusting the outlet shape of the crosshead die, the step after exiting from the outlet of the crosshead die and before cooling, the resin-impregnated fiber bundles are arranged one above the other. A method of passing between more than one roller (shaping roll) can be applied.

<Stab vest>
The blade-proof plate of the present invention is formed by compression-molding the above-mentioned resin-impregnated fiber bundle.
The size, thickness, density, etc. of the blade-proof plate of the present invention can be determined according to a specific application.
The blade-proof plate of the present invention has not only a planar shape but also a three-dimensional shape composed of a combination of a plurality of flat surfaces, a hemispherical shape, a cylindrical shape, a semi-cylindrical shape (a shape obtained by dividing a cylinder in the length direction), and the like. It also includes those that have and those that combine a flat surface and a curved surface.
The shape of the blade-proof plate of the present invention can be appropriately adjusted according to the intended use, but unevenness can also be formed if necessary.
The blade-proof plate of the present invention preferably has a thickness of 1.5 to 10 mm and a density of 1.10 to 1.80 g / cm ^3.

The blade-proof plate of the present invention
(I) The required amount of resin-impregnated fiber bundles was randomly arranged only in the plane direction (two-dimensionally arranged state), and the resin-impregnated fiber bundles in contact with each other were fused and compressed. Form,
(II) The resin in contact with the resin in a state where the required amount of the resin-impregnated fiber bundle is randomly arranged (arranged three-dimensionally) in the plane direction and diagonally with respect to the plane direction. The impregnated fiber bundles can be fused to each other to form a compressed form.
The required amount of the resin-impregnated fiber bundle is the total number of resin-impregnated fiber bundles used according to the target blade size and thickness as well as the density.
The required amount of the resin-impregnated fiber bundle is calculated by determining the size, thickness, and density of the reference blade-proof plate, and obtaining the total number of resin-impregnated fiber bundles required for the trial production in advance. be able to.

Since the resin-impregnated fiber bundle used in the blade-proof plate of the present invention has a flatness ratio in the range of 1.0 to 8.0, it is compared with an ellipse having a circular cross section or a cross section close to that of the above (I). In both the form and the form (II), the adjacent resin-impregnated fiber bundles are likely to come into contact with each other, and the contact area becomes large. Therefore, when the resin-impregnated fiber bundle is placed in a heated atmosphere, the resin-impregnated fiber bundles are easily fused to each other.
Further, since the resin-impregnated fiber bundle used in the blade-proof plate of the present invention has a flatness ratio in the range of 1.0 to 8.0, it is compared with an ellipse having a circular cross section or a cross section close to that of (II). It is preferable because it tends to be in the form. For example, when there is a gap between the resin-impregnated fiber bundles, it is difficult for the circular one to enter the gap, but for the flat shape, it is easy to enter the gap, so that the three-dimensional arrangement can be easily performed. ..

<Manufacturing method of blade-proof plate>
The method for manufacturing the blade-proof plate of the present invention will be described.
In the first step, a required amount of resin-impregnated fiber bundle is randomly charged into the heating container. When the bulk density of the resin-impregnated fiber bundle is small (for example, 0.1 to 0.4 g / cm ³ ), the thickness of the resin-impregnated fiber bundle put into the heating container has a small bias and can be made substantially uniform. preferable.
By applying vibration to the heating container as needed, the thickness of the resin-impregnated fiber bundle after charging can be smoothed.
When the vibration is applied, three methods of vertical direction, horizontal direction, vertical direction and horizontal direction can be applied to the heating container, but since the thickness of the resin-impregnated fiber bundle can be adjusted in a shorter time, the vertical direction, Alternatively, a method of applying vibration in the vertical and horizontal directions is preferable.

In the next step, the resin-impregnated fiber bundle in the heating container is preheated by a non-contact heater.
As the non-contact type heater, a heater selected from infrared rays, near infrared rays, induction heating (IH) and hot air as a heat source is preferable.
Preheating is carried out until the resin-impregnated fiber bundles put into the heating container are fused to each other and integrated to the extent that the whole does not move.
The resin-impregnated fiber bundle used in the previous step has a ^{small bulk density of 0.1 to 0.4 g / cm 3,} and there are many gaps between the resin-impregnated fiber bundles. Even if there is, heat is quickly distributed to the entire resin-impregnated fiber bundle in the heating container, so that the heat can be integrated in a short time.

In the next step, the resin-impregnated fiber bundle after preheating is compressed while being heated to obtain a blade-proof plate.
In this compression step, the integrated product of the resin-impregnated fiber bundle obtained in the previous step is placed in a pressing die and then compressed while being heated.
The heating temperature during compression is a temperature lower than the softening point of the thermoplastic resin contained in the resin-impregnated fiber bundle, and is preferably lower than the preheating temperature.
In the compression step, a heat and cool molding method can also be applied in order to shorten the molding cycle time and enhance the surface appearance.
The heat-and-cool molding method is a method in which molding is performed in a state where the mold temperature is rapidly increased before compression molding, and then the mold is rapidly cooled.
Further, by performing the above-mentioned preheating treatment on the molded product after compression molding again and then compression molding again, the dispersibility of the fibers in the molded product is improved and the uniformity of the molded product is enhanced. Therefore, a more stable blade-proof plate (because the dispersibility of fibers in the molded product is good, the mechanical properties of the molded product are stable) can also be obtained.
It is preferable to adjust the thickness of the compression molded product (blade-proof plate) to be 1.5 to 10 mm and the density to be 1.10 to 1.80 g / cm ^3.

<Blade-proof clothing>
The blade-proof clothing of the present invention means that it includes something that a person wears, and a blade-proof plate is arranged inside the clothing. The inside of the garment is preferably between the front and back fabrics of the garment, but it is fixed by sticking it to the back fabric or sewing it using a hole made in the blade-proof plate in advance. It may have been done.
Stab-proof clothing is for protecting a part of the body by arranging a blade-proof plate on a part or all of the clothing, for example, a blade-proof vest, a blade-proof apron, a blade-proof gloves, and a blade-proof clothing. Examples include shoes, stab-proof neck guards, stab-proof face guards, stab-proof helmets, stab-proof shin pads, stab-proof knee pads, stab-proof elbow pads, and stab-proof shoulder pads.

Production Example 1 (Manufacture of resin-impregnated glass fiber bundle)
A fiber bundle (aminosilane coupling-treated fiber bundle of E-GLASS [diameter 13 μm-1600]) bundled with a sizing agent composed of long glass fibers of the component (A) was passed through a crosshead die.
At that time, another twin-screw extruder (cylinder temperature 290 ° C.) supplies a melt of polypropylene (PMB02A, manufactured by SunAllomer Ltd.) as a component (B) to the crosshead die to impregnate the long glass fiber bundle. I let you.
Then, it was shaped with a shaping nozzle at the outlet of the crosshead die, shaped with a shaping roll, and then cut to a predetermined length with a pelletizer to obtain a resin-impregnated fiber bundle shown in Table 1.
When the resin-impregnated fiber bundle thus obtained was cut and confirmed, the long glass fibers were substantially parallel in the length direction, and the resin was impregnated up to the center. The length of the resin-impregnated fiber bundle and the length of the glass length fiber are the same.

The average length of the major axis (D1) and the average length of the minor axis (D2) were measured by the following methods.
Ten resin-impregnated glass fiber bundles were taken out, and the major axis length and the minor axis length of the cross section (end face) were measured using a scanning electron microscope to obtain an average value. Specifically, the long axis is the straight line that intersects the cross section and the length of the two intersections of the outer peripheral part of the cross section and the straight line is the longest, and the straight line that intersects the long axis perpendicularly is the straight line and the outer peripheral part of the cross section. The longest of the lengths of the two intersections is defined as the minor axis.

(Measurement method of bulk density)
Approximately 200 g of resin-impregnated glass fiber bundle (mass M) weighed with an accuracy of 0.1% is gently placed in a dry 1000 ml graduated cylinder (minimum scale unit: 2 ml) without consolidation, and is not tapped (loose). The looseness volume (v ₀ ) of was read up to the smallest scale unit. Then, the bulk density (g / cm ³ ) was determined _{from M / v 0.}

Example 1
About 120 g of the above-mentioned resin-impregnated glass fiber bundle was prepared and put into a stainless steel flat-bottomed container so as to have a substantially uniform thickness from a height of 15 to 20 cm.
Then, heating (non-contact heating) at 200 ° C. for 100 seconds was carried out a total of three times in a furnace (Implastine furnace N7GS manufactured by NGK Insulators, Ltd .; equipped with an infrared heater as a heat source). By this heat treatment, polypropylenes were fused and integrated into the impregnated glass fiber bundle in the flat bottom container.
Then, the integrated resin-impregnated glass fiber bundle was pressed by a press machine (STI-1.6-220VF manufactured by Sanyu Co., Ltd.) for 10 seconds (press temperature 170 ° C., press pressure 2t).
Then, it cooled to room temperature to obtain a blade-proof plate (length 200 mm, width 200 mm, thickness 2 mm, density 1.50 g / cm ³ ).
As shown in FIG. 1A, the blade-proof plates 1 of Examples 1 and 2 are present in a state in which a large number of glass fibers 2 having a length of 30 mm are intricately interlaced.

Example 2
About 120 g of two resin-impregnated glass fiber bundles described above were prepared and put into a stainless steel flat-bottomed container from a height of 15 to 20 cm so as to have a substantially uniform thickness.
Then, heating (non-contact heating) at 200 ° C. for 100 seconds was carried out a total of three times in a furnace (Implastine furnace N7GS manufactured by NGK Insulators, Ltd .; equipped with an infrared heater as a heat source). By this heat treatment, polypropylenes were fused and integrated into the impregnated glass fiber bundle in the flat bottom container.
Then, the integrated resin-impregnated glass fiber bundle was pressed by a press machine (STI-1.6-220VF manufactured by Sanyu Co., Ltd.) for 10 seconds (press temperature 170 ° C., press pressure 2t).
Then, it cooled to room temperature to obtain a blade-proof plate (length 200 mm, width 200 mm, thickness 4 mm, density 1.50 g / cm ³ ).
As shown in FIG. 1A, the blade-proof plates 1 of Examples 1 and 2 are present in a state in which a large number of glass fibers 2 having a length of 30 mm are intricately interlaced.

Comparative Examples 1 and 2
Using the above resin-impregnated fiber bundle, injection molding was performed under the following conditions to obtain a blade-proof plate (length 200 mm, width 200 mm, thickness 2 mm, density 1.50 g / cm ³ ) having a rectangular planar shape.
(injection molding)
Equipment: J-150EII manufactured by Japan Steel Works, Ltd.
Molding temperature (cylinder temperature): 235 ° C
Molded product: (Comparative Example 1) 2 mmt flat plate, (Comparative Example 2) 4 mmt flat plate In the blade-proof plates 11 of Comparative Examples 1 and 2, glass fibers 12 having a length of about 3 mm are dispersed as shown in FIG. 1 (b). It exists in a state of being.

(Impact resistance test)
The blade-proof plates of Examples and Comparative Examples were cut into 100 mm squares (thickness is shown in Table 1) and used as test plates.
Performed at the center of the sample support 31 of the modified DuPont impact tester shown in FIG. 2 (a) (the sample support of the DuPont impact tester shown in JIS K5400 6.13 is a cylinder with a diameter of 48 mm and a wall thickness of 2 mm) 30. The blade-proof plate 1 of the example or the blade-proof plate 11 of the comparative example was placed.
Next, the weight was dropped on the stab vest 20 with the conical tip 20a (FIG. 2B) of the stab vest 20 in contact with the stab vest 1 (stab vest 11). The weight was changed in 3 steps. In FIG. 1 (a), the weight is omitted, and the white arrow indicates the fall of the weight.
Using five blade-proof plates 1 (blade-proof plates 11) in each example, the impact energy (load g × height cm) when no cracks were observed in three or more plates was determined. As the impact energy, the impact energy when not penetrating and the impact energy when completely penetrating were obtained.
As for the impact energy when not penetrating, when the total luminous flux (85 [lm] penlight) is applied from the hole (dent) side of the blade-proof plate 1 (blade-proof plate 11), the hole cannot be visually confirmed from the opposite side. The impact energy obtained from the maximum height and load at the time was defined as the impact energy (J) when not penetrating. If there is a through hole, light leaks, so it can be easily confirmed.
For the impact energy at the time of complete penetration, the impact energy obtained from the height and load at which the conical tip portion 20a of the striking center 20 completely penetrates is defined as the impact energy (J) at the time of complete penetration.
In addition, using weights of 2 kg and 3 kg, the maximum height when not penetrating was also determined in the same manner.

Test equipment: DuPont impact tester (manufactured by Toyo Seiki Co., Ltd.) (Fig. 2 (a))
Impact tip: Diameter 6 mm, tip angle 30- (Fig. 2 (b))
Falling weight: Maximum 5000g by combining 500g, 1000g and 2000g
Test temperature: 23 ° C, 50% RH

(Pull-out test)
The difficulty of pulling out the conical tip portion 20a of the striking core 20 completely penetrated in the above test from the test plate 1 (test plate 11) was evaluated by the pulling time.
In the pull-out test, the examiner holds the end of the striking center 20 (the end opposite to the tip of the cone) by hand with the circumference of the test plate 1 (test plate 11) fixed, and the test plate 1 (test). The time required for pulling out was measured while rotating in one direction perpendicular to the surface of the plate 11). It was difficult to pull it out without rotating it. Each case was performed by the same examiner.

From the comparison between Example 1 and Comparative Example 1 and the comparison between Example 2 and Comparative Example 2, there was a difference of about 10 times in the residual fiber length in the molded product between the compression molded product and the injection molded product. Therefore, as shown in FIG. 3A, the blade-proof plate (test plate 1) of Examples 1 and 2 having a long residual growth penetrates even when a load is applied to the conical tip portion 20a of the striking center 20. It was confirmed that it was difficult to do.
Further, when the conical tip portion 20a of the hammer 20 completely penetrates the blade-proof plate (test plate 1) of Examples 1 and 2, the blade-proof plate (test plate 1) is as shown in FIG. 3 (b). The raised portion 5 around the through hole was long, cracks did not occur, the opening area was small (due to the long residual fiber length), and it acted to tighten the circumference of the weight 20, making it difficult to pull out [Fig. 4]. (A), (b)].
On the other hand, as shown in FIG. 5, when the conical tip portion 20a of the striking center 20 penetrates the blade-proof plate (test plate 11) of Comparative Examples 1 and 2, FIG. 3 (b) [FIG. 4 (a), Compared with [(b)], the raised portion 15 is shorter, cracks are formed, and the opening area is larger (due to the shorter residual fiber length), so that it was easier to pull out than in the examples [(FIG. 6 (a) ()). b)].
Therefore, when the blade-proof plate of the present invention is used for the blade-proof vest, it has a high protective effect against sharp metal objects such as blades, so that the blade may be stabbed from above the blade-proof vest. However, it is difficult for the blade to penetrate, and it can be kept injured or slightly injured. Furthermore, even if the blade is attacked by a thug with a blade and the blade penetrates the stab vest, it is difficult to pull out the blade, so it is difficult to be stabbed again and again, and injuries can be minimized and the thug. It becomes easier to hold down.

The blade-proof plate of the present invention can be used for blade-proof clothing such as a blade-proof vest.

1 Blade-proof plate (test plate) of the example
2 Glass fiber 11 Blade-proof plate (test plate) of the comparative example
12 Glass fiber 20 Strike center 20a Conical tip

Claims (4)

This is a method for manufacturing a blade-proof plate made by compression molding a resin-impregnated fiber bundle.
The resin-impregnated fiber bundle is integrated by impregnating 100 parts by mass of (A) a bundle of fiber materials with (B) 25 to 300 parts by mass of a thermoplastic resin, and has a length (L) of 10. It is a flat shape with a cross-sectional shape of ~ 50 mm and a cross-sectional shape in the width direction having a major axis and a minor axis (major axis length> minor axis length).
The average length (D1) of the major axis is 0.5 to 4.0 mm.
The average flatness ratio (D1 / D2) obtained from the average length (D1) of the major axis and the average length (D2) of the minor axis is 1.0 to 8.0.
The ratio of L to D1 (L / D1) is 10 to 50, and
The method for manufacturing a blade-proof plate obtained by compression-molding the resin-impregnated fiber bundle is
In the first step, a resin-impregnated fiber bundle having a bulk density of 0.1 to 0.4 g / cm ^{3 is randomly charged into the heating container.}
In the next step, the resin-impregnated fiber bundle in the heating container is preheated by a non-contact heater, and the resin-impregnated fiber bundles put into the heating container are fused and integrated.
In the next step, a method for manufacturing a blade-proof plate, in which an integrated product of resin-impregnated fiber bundles obtained in the previous step is placed in a press die and then compressed while heating to obtain a blade-proof plate. The blade-proof plate is in a form in which the resin-impregnated fiber bundles in contact with each other are fused and compressed with the required amount of the resin-impregnated fiber bundles randomly arranged.
Thickness 1.5 to 10 mm, density of 1.10~1.80g / cm ^3, the manufacturing method of the vibration cutter plate according to claim 1, wherein. The resin impregnation in which the blade-proof plate is in contact with the resin-impregnated fiber bundle in a state where the required amount of the resin-impregnated fiber bundle is randomly arranged in three dimensions so as to be oblique to the surface direction and the surface direction. The fiber bundles are fused to each other and compressed.
Thickness 1.5 to 10 mm, density of 1.10~1.80g / cm ^3, the manufacturing method of the vibration cutter plate according to claim 1, wherein. The blade-proof plate according to any one of claims 1 to 3 , wherein the fiber of the component (A) is selected from carbon fiber, glass fiber, and aramid fiber, and the thermoplastic resin of the component (B) is polypropylene. Manufacturing method.

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