JP2022137447A - Carbon fiber tape material and reinforcing fiber laminate using the same, and molded body - Google Patents

Abstract

To provide a carbon fiber tape material which has good followability to a mold and good impregnability with a matrix resin, enables improvement of productivity when reinforcing fiber laminate is produced by a fiber placement method, and enables acquisition of a molded body having a high carbon fiber content and high mechanical strength when impregnated with the resin and molded.SOLUTION: A carbon fiber tape material 100 is provided which is formed by integrating: a carbon-fiber-bundle group 102 in which a plurality of carbon fiber bundles 101 oriented in one direction are arranged; and a cloth 103 having regularity. The carbon fiber tape material satisfies (a) that the cloth is composed of at least two kinds of different thermoplastic resins and (b) that the basis weight of the tape material is in the range of 100 g/m2 to 400 g/m2.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a reinforcing fiber tape material, and a reinforcing fiber laminate and molded article obtained by arranging and laminating the same.

Fiber reinforced plastic (FRP), which consists of reinforcing fibers and resin, is used for aviation, space, automobile applications, etc. due to its light weight and high strength. As a molding method that achieves both the productivity and high strength of FRP, a reinforcing fiber laminate such as a resin transfer molding method (RTM) or a VaRTM method (vacuum-assisted resin transfer molding) is used. There is a molding method in which the resin is impregnated and cured later. In the RTM molding method, a reinforcing fiber laminate composed of a reinforcing fiber base material composed of a group of dry reinforcing fiber bundles that are not pre-impregnated with a matrix resin is placed in a mold, and a liquid low-viscosity matrix resin is added. This is a molding method in which a matrix resin is impregnated and solidified after injection to mold an FRP. When particularly high productivity is required, the cavity inside the mold is made thicker than the thickness of the final molded product when injecting resin, and a technology that shortens the molding time of fiber-reinforced plastic by closing the mold for high-speed impregnation is used. be done. Further, in recent years, a wet press molding method has also been used in which a reinforcing fiber laminate is coated with a liquid resin, followed by mold clamping and impregnation with the resin.

A reinforcing fiber laminate that is impregnated and cured with a resin is conventionally composed of a dry reinforcing fiber bundle group in which the reinforcing fiber bundle is not impregnated with a resin, such as a woven fabric or a non-crimp fabric (Non Crimp Fabric: NCF). It is formed by cutting out a desired shape from a reinforcing fiber base material having a constant width (that is, a substantially rectangular shape) into a three-dimensional shape and fixing it. However, when a desired shape is cut out from a cloth of a certain width in this way, a large amount of leftover material is generated. That is, there is a problem that the amount of discarded reinforcing fibers increases, and the conventional method of manufacturing a reinforcing fiber base material in the form of a cloth having a certain width in advance increases the manufacturing cost.

In order to solve such problems, a fiber placement method is attracting attention, in which reinforcing fiber bundles are arranged only at necessary locations so as to have a desired shape in accordance with the shape of the product. According to the fiber placement method, in order to place the required amount of reinforcing fibers in the required locations, the reinforcing fibers are formed into a tape-like form, and the tape material is placed only in the required locations, thereby reducing the amount of reinforcement that is discarded. The amount of fibers can be significantly reduced. In addition, the reinforcing fiber base material manufactured by the fiber placement method has less crimping of the reinforcing fiber bundles than conventional fabrics and NCF, and has excellent straightness, so the FRP obtained by injecting and curing resin is high. It has mechanical strength.

However, in the fiber placement method, when the carbon fiber tape is directly attached to the mold, the carbon fiber tape needs to conform to the shape of the mold. Therefore, the wider the carbon fiber tape and the more complicated the shape of the mold, the higher the deformability of the carbon fiber tape. In addition, it is required to have high productivity in lamination of carbon fiber tapes and resin injection in RTM molding and VaRTM molding. Furthermore, molded FRP is required to have a high carbon fiber content. If the carbon fiber content of the molded FRP is low, the ratio of the carbon fiber to the volume of the member will be low, leading to a reduction in the strength of the member.

As a conventional technology related to the carbon fiber tape material used in the fiber placement method, for example, Patent Literature 1 proposes a carbon fiber tape material having a polymer adhesive bonded to both surfaces thereof, and a method for producing the carbon fiber tape material. According to this method, a carbon fiber tape having a desired width can be manufactured with high accuracy by melting the polymer adhesive and attaching it to the group of reinforcing fiber bundles.

Patent Document 2 proposes a carbon fiber tape material in which a nonwoven veil is adhered to at least one side of a carbon fiber bundle, a preform, and a method for manufacturing the same. According to this method, by using the carbon fiber tape material to which the non-woven veil is adhered, the effect of increasing the ease of diffusion of the resin in the in-plane direction during resin injection in RTM molding or VaRTM molding can be obtained. Also, the use of thermoplastic fibrous materials in the nonwoven veil can result in toughening of the resulting composite material.

Furthermore, Patent Document 3 proposes a reinforcing sheet material comprising a knitted fabric of a reinforcing fiber material having a basis weight of 80 g/m ² or less and a thermoplastic resin material. With such a configuration, by using a flexible knitted fabric, it is possible to obtain a thin and wide sheet material that maintains straightness and is free from deformation such as curling. In addition, since a thin knitted fabric with many voids is used, internal air can be removed, and a molded product with few voids can be obtained.

Further, Patent Document 4 proposes a laminate of multifilament reinforced yarns in which nonwoven fabrics having two polymer components with different melting temperatures are used between and/or on the layers. According to such a structure, when a preform is manufactured using this laminate under heating, part of the polymer is melted between the layers, making the yarns more slippery, and good drapeability can be obtained. In addition, some polymers do not melt and retain their shape, so that good impregnability can be maintained in the subsequent impregnation step.

Furthermore, in Patent Document 5, a composite material laminate impregnated with a thermosetting base resin, wherein an intermediate layer in the laminate includes a soluble thermoplastic component that dissolves in the base resin and the base resin Laminates containing an insoluble component that does not dissolve in the liquid have been proposed. According to this configuration, the thickness of the intermediate layer can be reduced by dissolving the soluble thermoplastic component that dissolves in the base material resin of the intermediate layer during curing, and an FRP molded product with a high carbon fiber content can be obtained. be able to.

Japanese translation of PCT publication No. 2012-510385 Japanese Patent Publication No. 2017-521291 JP 2015-116806 A Japanese Patent Publication No. 2013-522078 JP 2016-153213 A

Here, the invention of Patent Document 1 does not refer to the deformability of the polymer adhesive. For example, when a non-woven veil is used as the polymer adhesive, the non-woven veil is formed by orienting short fibers at random and generally does not have sufficient deformability in the plane direction. In addition, when the polymer adhesive melts, the nonwoven veil loses its shape, which reduces the inherent deformability of the fabric material.

The invention of Patent Document 2 uses a carbon fiber tape material in which a non-woven veil is adhered to at least one side of a carbon fiber bundle. Therefore, the non-woven veil is formed by randomly orienting the short fibers as in Cited Document 1, and thus does not have sufficient deformability.

In the invention of Patent Document 3, a fabric having deformability is used, but in order to obtain the desired product thickness due to the low basis weight of the reinforcing fiber material, it is necessary to laminate many sheet materials, which makes the work complicated and lowers productivity. descend. Further, the invention described in Patent Document 3 relates to a reinforcing sheet material, and does not suggest application of such a reinforcing sheet material to the fiber placement method.

In the invention of Patent Document 4, a nonwoven fabric having two polymer components with different melting temperatures is used between and/or on the layers as a laminate of multifilament reinforced yarns. This is intended to improve the drape property by melting the inter-layer non-woven fabric and acting as a lubricant during manufacture, but not to improve the reinforcing fiber content of the FRP panel after molding. In addition, as in Document 1, since the non-woven veil is formed by randomly orienting short fibers, it does not have sufficient deformability.

In the invention of Patent Document 5, the thickness of the intermediate layer can be reduced by dissolving the soluble thermoplastic component that dissolves in the base material resin of the intermediate layer during curing, and an FRP molded product with a high carbon fiber content can be produced. Obtainable. On the other hand, films, particles, discontinuous filaments, and veils have been proposed as material forms for the intermediate layer, but the intermediate layers in these forms cannot have sufficient deformation due to their structures. , the fiber placement tape or the composite laminate with its intermediate layer also does not have sufficient deformation.

The present invention is intended to solve the problems of the prior art, and more specifically, to produce a reinforced fiber laminate with good followability to a mold and impregnation with a matrix resin, and by a fiber placement method. The carbon fiber can increase productivity when impregnated with a resin, has a high carbon fiber content when molded with a resin, and can therefore provide a molded product having high mechanical strength. It provides a tape material. Further, the present invention provides a reinforcing fiber laminate and a molded article obtained from such carbon fiber tape material.

The present invention has been made to solve at least part of the above problems, and is characterized by any one of the following configurations.
(1) A carbon fiber tape material in which a group of carbon fiber bundles in which a plurality of carbon fiber bundles are aligned in one direction and a regular fabric are integrated, and the following (a), ( A carbon fiber tape material that satisfies b).
(a) the fabric is composed of at least two different thermoplastic resins; (b) the carbon fiber tape material has a basis weight between 100 g/m ² and 400 g/m ² ; It is composed of a first thermoplastic resin and a second thermoplastic resin having a softening point T2, and the softening point T1 (° C.) of the first thermoplastic resin and the softening point T2 (° C.) of the second thermoplastic resin are in the following relationship, the carbon fiber tape material according to (1).
10<T2-T1<120
(3) The carbon fiber tape material according to (1) or (2), wherein the basis weight of the fabric is between 2 g/m ² and 30 g/m ² .
(4) The carbon fiber tape material according to any one of (1) to (3), characterized by having a gap of 0.1 mm to 1 mm between the carbon fiber bundles.
(5) The carbon fiber tape material according to any one of (1) to (4), characterized in that the fabric is bonded to at least one side of the carbon fiber bundle via a binder, thereby integrating the carbon fiber bundle. .
(6) The carbon fiber tape material according to any one of (1) to (5), characterized in that the fabric and the binder are partially adhered.
(7) The structure of the fabric is a knitted fabric, and the first thermoplastic resin fibers are composed of a first thermoplastic resin and the second thermoplastic resin fibers are composed of a second thermoplastic resin. The carbon fiber tape material according to any one of (1) to (6), wherein the knitted fabric is formed by positioning each according to regularity.
(8) The fabric is a woven fabric, and the first thermoplastic resin fibers made of the first thermoplastic resin are used for the warp yarns, and the second thermoplastic resin made of the second thermoplastic resin. The fiber is used for the weft, or the first thermoplastic resin fiber is used for the weft and the second thermoplastic resin fiber is composed of the second thermoplastic resin. The carbon fiber tape material according to any one of (1) to (6), which is used for warp threads.
(9) A laminate using the carbon fiber tape material according to any one of (1) to (8).
(10) A molded article using the laminate according to (9).

The carbon fiber tape material of the present invention has good mold conformability and resin impregnation properties, and when manufacturing a reinforcing fiber laminate by the fiber placement method, its high deformability can improve productivity. In addition, when impregnated with a resin and molded, a molded article having a high fiber content and mechanical strength can be provided.

1 is a schematic diagram of a carbon fiber tape material according to the present invention; FIG. FIG. 4 is a schematic diagram of another carbon fiber tape material according to the present invention; FIG. 4 is a schematic diagram of another carbon fiber tape material according to the present invention; 1 is a schematic plan view of a fabric according to the invention; FIG. 1 is a schematic plan view of a carbon fiber tape material using a knitted fabric as a fabric according to the present invention; FIG. 1 is a schematic plan view of a carbon fiber tape material using a woven fabric as a fabric according to the present invention; FIG. 1 is a schematic diagram showing a method of measuring fabric elongation; FIG. FIG. 2 is a schematic diagram showing how to implement a picture frame method with a two-sided grasp method; It is a graph showing the relationship between the shear angle and the tensile load when the picture frame method is implemented by the two-sided gripping method.

A schematic diagram of the carbon fiber tape material according to the present invention is shown in FIG.

The carbon fiber tape material 100 shown in FIG. 1 includes a carbon fiber bundle group 102 in which a plurality of carbon fiber bundles 101 aligned in one direction are arranged in parallel (parallel) to each other in the width direction, and a fabric 103 having regularity. are integrated.

As the carbon fiber bundle used in the present invention, for example, a carbon fiber bundle that has undergone a sizing treatment in advance can also be used. By applying the sizing treatment, it is possible to improve the bundling property of the carbon fiber bundle and suppress the generation of fluff. Further, the carbon fiber bundle used in the present invention may be a mixture of carbon fibers and organic fibers.

In a preferred embodiment, the number of filaments N (unit: K=1,000) of the carbon fiber bundle is 1K (1,000) or more and 60K (60,000) or less. If the number of single fibers in the carbon fiber bundle 101 is less than 1K, the yarn width of the carbon fiber bundle 101 is narrow, and defects such as twisting are likely to occur. When the number of single fibers of the carbon fiber bundle 101 is more than 60K, the carbon fiber basis weight of the carbon fiber bundle 101 becomes high, and when the carbon fiber bundle 101 is aligned and used as a base material by the fiber placement method, the per layer Since the carbon fiber basis weight becomes too high, there is a possibility that the permissible range of orientation design will be narrowed.

The carbon fiber tape material 100 has a configuration in which a carbon fiber bundle group in which a plurality of carbon fiber bundles 101 are aligned in one direction and a regular cloth 103 are integrated. The number and weight of carbon fiber filaments per unit length of can be increased. In addition, when manufacturing fiber reinforced plastic by arranging and laminating carbon fiber tape materials by the fiber placement method, the time required for arranging and laminating carbon fiber tape materials to achieve the desired fiber volume content can be shortened, and production can improve sexuality.

It is important that fabric 103 is composed of at least two thermoplastic resins. Here, thermoplastic resins include thermoplastic resins such as polyamide resins, polyester resins, polyethylene terephthalate resins, polyvinyl formal resins, polyethersulfone resins, phenoxy resins, and polycarbonate resins, as well as thermoplastic elastomers (polystyrene resins, polyolefin-based resins, polyurethane-based resins, polyester-based resins, polyamide-based resins, polybutadiene-based resins, polyisoprene-based resins, fluorine-based resins, acrylonitrile-based resins, etc.), their copolymers, modified products, and these resins Shows resins, etc. blended with more than one type. These resins can be fibrous to form a woven fabric (woven fabric, knitted fabric) or non-woven fabric, or can be made into a film to form the fabric 103 . By partially melting the cloth 103, the cloth 103 is integrated with the carbon fiber bundle group 102. As shown in FIG.

Importantly, the carbon fiber tape material of the present invention is between 100 g/m ² and 400 g/m ² . When the basis weight of the carbon fiber tape material is less than 100 g/m ² , when arranging the carbon fiber tape material by the fiber placement method, the number of carbon fiber tape materials to be laminated to obtain a laminate with the desired basis weight increases. , the time required for lamination increases, which is a constraint in further improving productivity. On the other hand, if the basis weight of the carbon fiber tape material is more than 400 g/m ² , the number of carbon fiber tape materials to be laminated to obtain a laminate with the desired basis weight is too small, and the degree of freedom in designing the fiber orientation may become narrower. Such basis weight is preferably 160 g/m ² to 300 g/m ² .

In one embodiment of the present invention, the fabric is composed of at least a first thermoplastic resin and a second thermoplastic resin, and the softening point T1 (° C.) of the first thermoplastic resin and the second thermoplastic resin The softening point T2 (° C.) of the resin preferably has the following relationship.
10<T2-T1<120

By maintaining such a relationship, during molding, for example, by curing at a temperature higher than T1 (° C.) and lower than T2 (° C.), the first thermoplastic resin is melted to reduce the thickness of the molded product. is reduced and a CFRP molded product with a high carbon fiber content can be obtained. Since the second thermoplastic resin does not melt, it acts as an interlaminar reinforcing material in the molded article, thereby contributing to the improvement of physical properties in compression after impact testing (CAI).

Further, in the placement step of the fiber placement method (also referred to as the AFP method), for example, by placing while heating at a temperature higher than T1 (° C.) and lower than T2 (° C.), the first thermoplastic resin is melted. By doing so, it is possible to reduce the thickness of the laminate, prevent the laminate from becoming bulky, and make it possible to manufacture a near-net shape preform in accordance with product dimensions. In addition, by performing heating and placement almost simultaneously, the first thermoplastic resin can be melted while the deformable tape conforms to the shape of the mold, so shaping into a complex shape is possible.

The heating temperature during molding is preferably higher than T1 (°C) and lower than T2 (°C). By heating in this temperature range, the thickness of the molded product can be reduced by curing the first thermoplastic resin in a molten state, and the second thermoplastic resin is not melted, so that the second thermoplastic resin can be cured. The thermoplastic resin is present in the molded product and can act as an interlaminar reinforcing material, contributing to the improvement of the physical properties of the compression after impact test (CAI).

In the present invention, it is preferable that the fabric 103 has deformability. That is, in at least one direction of the fabric, the elongation of the fabric when a load of 80 mN/50 mm is applied to the fabric is preferably 5% to 100%, more preferably 15% to 100%. By using a deformable fabric, the deformability of the tape can be improved, and when the carbon fiber tape is directly attached to the mold by the fiber placement method, the carbon fiber tape can follow the shape of the mold. . If the elongation of the fabric is less than 5%, the fabric does not have sufficient deformability and the carbon fiber tape cannot conform to the shape of the mold. If the elongation rate of the fabric is more than 100%, the fabric will be deformed by a slight external force, making it difficult to adhere the fabric to the carbon fibers with high precision and integrate them. Here, the elongation rate of the fabric is determined by the following formula according to JIS L 1096 (2011 version) 8.16.1.
E _p =[(L ₁ −L ₀ )/L ₀ ]×100
E _p : Fabric elongation rate (%)
L ₀ : Fabric length between original marks (mm)
L ₁ : Fabric length when load is applied (mm)

A method for measuring the elongation of the fabric is shown in FIG. FIG. 7(a) shows the state of the fabric 703 before a constant load is applied. A cloth is cut to a specified size, a specified mark 711 is marked on the cloth, a distance _L0 between the marks is measured, and then the cloth is chucked by a clamp 710 as shown in FIG. 7(a). After that, a load is applied. FIG. 7(b) shows the state of the fabric 703 after applying a constant load. As shown in FIG. 7(b), by measuring the distance L1 between the marks after applying _a constant load, it is possible to calculate the elongation rate from the specified formula. In addition, when measuring the elongation of the fabric from the tape material in which the carbon fiber bundle and the fabric are integrated, the measurement is performed by the above procedure after the fabric is peeled off from the tape material.

Also, it is important that the fabric 103 has regularity. In the present invention, "has regularity" means that a certain structure form is continuously repeated in the longitudinal direction of the fabric (that is, the longitudinal direction of the carbon fiber tape material). Examples of regular fabrics include knitted fabrics and woven fabrics. In knitted fabrics and woven fabrics, the structure is continuously repeated in the longitudinal direction, and the position of the fibers is determined by the structure. I can say. On the other hand, non-woven fabrics (non-woven veils) can be cited as examples of non-regular fabrics. Since the nonwoven fabric has a structure in which short fibers are randomly scattered and then bonded to each other, it is difficult to achieve the above-mentioned elongation rate of the fabric, and the structure is not continuously repeated in the longitudinal direction. , fiber orientation and weight per unit area are prone to variations and biases.

Regular fabric textures include woven structures such as plain weave, twill weave, and satin weave, warp knit structures such as denim, cord, atlas, chain stitch, inlay, satin, half, and tulle, weft knit structures, or combinations thereof. can be used.

These regular fabrics maintain their shape by interweaving or interweaving the fibers. That is, compared to non-woven fabrics in which the relative positions of the fibers are fixed by bonding to each other, the positions of the woven or woven fibers are not completely fixed and have a high degree of freedom. Excellent deformability when force is applied inward (surface direction).

The fabric 103 preferably has a basis weight of more than 2 g/m ² and less than or equal to 30 g/m ² , more preferably more than 4 g/m ² and less than or equal to 20 g/m ² . If the basis weight of the fabric 103 is 2 g/m ² or less, the fabric of the fabric is easily torn, making it difficult to obtain desired deformability. In addition, as the thickness of the cloth becomes thinner, it becomes difficult to sufficiently secure the matrix resin flow path during impregnation. Furthermore, since the fabric is thin, the thickness of the interlaminar reinforcing material in the molded article is thin, making it difficult to reinforce the interlaminar layers of the laminated fiber bundles. On the other hand, when the basis weight of the fabric 103 is greater than 30 g/m ² , the thickness of the fabric increases, so the thickness of the carbon fiber tape material increases, and the thickness of the reinforcing fiber laminate using the carbon fiber tape material is the desired product. It tends to be larger than the thickness, that is, it becomes difficult to obtain the desired near-net shape of the molded body for reinforcing fiber lamination using the carbon fiber tape material. In addition, a molded article molded using this reinforcing fiber laminate tends to have a large thickness of the interlayer reinforcing material, making it difficult to increase the fiber content (Vf:%) in the molded article.

In addition, the fabric 103 is used not only for the purpose of improving the deformability of the tape, but also for the purpose of securing a matrix resin flow path during resin impregnation, and strengthening the interlayer by using a resin material that exhibits high toughness. It can also be used for any purpose.

A gap 106 is preferably provided between the plurality of carbon fiber bundles 101 forming the carbon fiber tape material 100 . Since there is a gap 106 between the plurality of carbon fiber bundles 101 that constitute the carbon fiber tape material 100, when it is arranged in one direction by the fiber placement method and used as a base material, the flow path of the matrix resin is secured. It's easy to do. In addition, even when a plurality of carbon fiber tape materials 100 are arranged in one direction without gaps (gap) by the fiber placement method and used as a base material, they are fixed within one carbon fiber tape material 100. When gaps are provided between the plurality of carbon fiber bundles 101, it becomes easier to secure the fluidity of the matrix resin during molding.

A gap 106 between the carbon fiber bundles is preferably 0.1 mm to 1 mm, more preferably 0.2 mm to 0.8 mm. If the clearance (gap) 106 is smaller than 0.1 mm, the channel of the matrix resin becomes small, which increases the time required for molding, which may lead to a decrease in productivity. When the gap 106 is larger than 1 mm, the carbon fiber tape material is laminated by the fiber placement method to form a reinforcing fiber laminate, and when molding, part of the upper layer tape is between the lower layer carbon fiber bundles. There is a risk that the straightness of the carbon fiber bundle will be reduced by dropping into the gap. As a result, there is a possibility that the compression properties of the resulting molded body may deteriorate.

The tape width of the carbon fiber tape material 100 is preferably 2 mm to 2000 mm, more preferably 5 mm to 100 mm. If the tape width of the carbon fiber tape material 100 is smaller than 2 mm, it will be necessary to arrange more carbon fiber tape materials in the fiber placement process, which tends to reduce productivity. If the tape width of the carbon fiber tape material 100 is larger than 2000 mm, the apparatus for manufacturing the tape becomes large, which tends to lead to an increase in tape cost, which is not preferable.

A carbon fiber tape material 200 shown in FIG. 2 is a schematic perspective view of another carbon fiber tape material according to the present invention. In this carbon fiber tape material 200, the cloth 203 having regularity is positioned on at least one side of the carbon fiber bundle group 202 in the same manner as the carbon fiber tape material shown in FIG. It is integrated with the carbon fiber bundle group 202 via a resin binder 204 attached to at least one side of the carbon fiber bundle group 202 for the purpose of retaining the shape of the bundle 201 . Otherwise, the configuration is the same as that of the carbon fiber tape material 100 shown in FIG. 1. The resin binder 204 may be in the form of particles or non-woven fabric. Also, the shape is not limited to these, and may be a film, mesh, emulsion, coating, or an auxiliary thread wound around a carbon fiber bundle.

Materials for the resin binder include thermoplastic resins such as polyamide resins, polyester resins, polyethylene terephthalate resins, polyvinyl formal resins, polyethersulfone resins, phenoxy resins, polycarbonate resins, phenolic resins, phenoxy resins, epoxy resins, and more. , polystyrene-based resins, polyolefin-based resins, polyurethane-based resins, polyester-based resins, polyamide-based resins, polybutadiene-based resins, polyisoprene-based resins, fluorine-based resins, acrylonitrile-based thermoplastic elastomers, and copolymers thereof , modified products, and resins obtained by blending two or more of these resins.

These resin binders are used for the purpose of securing the flow path of the matrix resin during resin impregnation, as well as for the purpose of securing the flow path of the matrix resin when impregnating with the reinforcing fiber laminate. It can also be used for the purpose of strengthening the interlayer.

As a form of fixing the carbon fiber bundle 201 with the resin binder 204, the surface of the carbon fiber bundle 201 may be adhered and partially impregnated with the resin binder 204 in a visible state to constrain the plurality of filaments contained in the carbon fiber bundle. Alternatively, the carbon fiber bundle 201 may be impregnated with a resin binder 204 so that the resin binder 204 is not visible from the surface, and the plurality of filaments contained in the carbon fiber bundle may be bound to each other. Alternatively, a resin binder may be wound around the carbon fiber bundles 201, or the carbon fiber bundles 201 may be coated with a resin binder.

The amount of the resin binder required to fix the carbon fiber bundles 201 is preferably 25 wt% or less, more preferably 20 wt% or less, and 15 wt% or less with respect to the weight of the carbon fiber bundles 201. is more preferred. If the amount of the resin binder is more than 25 wt %, the viscosity of the matrix resin increases and the fluidity tends to decrease when the tape material is arranged and laminated by the fiber placement method to form a reinforcing fiber laminate and molded. Therefore, productivity tends to decrease. In addition, since it takes a long time for the matrix resin to flow, the viscosity of the matrix resin is further increased, and the resin-unimpregnated portion tends to occur in the molded article, leading to deterioration of the mechanical properties of the molded article.

The softening point Ts (° C.) of the fabric 203 is preferably higher than the softening point of the resin binder 204 . Here, when the fabric 203 is composed of a plurality of types of thermoplastic resins, the softening point of the thermoplastic resin having the lowest softening point among the plurality of types of thermoplastic resins is the softening point Ts (° C.) of the fabric 203. I reckon. For example, when only two types of the first thermoplastic resin and the second thermoplastic resin are used, the softening point Ts (° C.) of the fabric 203 is the softening point T1 (° C.) of the first thermoplastic resin. match. At this time, by heating and pressing at a temperature higher than the softening point of the resin binder 204 and lower than the softening point of the cloth 203, the cloth 203 and the carbon fiber bundle group 202 are bonded together using the melted resin binder 204 as an adhesive. can be integrated. In this case, since the fabric 203 does not melt and retains its structure, the carbon fiber tape material 200 with excellent deformability can be obtained without impairing the deformability of the fabric 203 .

Also, the softening point (° C.) of the resin binder 204 is preferably higher than 40° C. and lower than the softening point Ts (° C.) of the fabric 203 . By using such a resin binder, the plurality of filaments constituting the carbon fiber bundle are fixed to each other when the viscosity is lowered by heating and then returned to normal temperature by cooling or the like, and the carbon fiber bundle is fixed to each other. As a result, a certain form can be held more reliably. When the shape of the carbon fiber bundle is kept constant, the carbon fiber tape material 200 is arranged on the mold by the fiber placement method, and when pressure or tension is applied to the carbon fiber tape material 200, the shape of the carbon fiber bundle can be prevented from collapsing. As a result, the gap 206 provided between the carbon fiber bundles 201 can be held without crushing, and the flow path of the matrix resin can be secured more reliably during molding.

In this specification, the term "softening point" refers to the temperature at which a resin material such as a fabric or a resin binder softens/melts when the temperature exceeds that temperature. Specifically, it refers to the melting point when the resin material is a crystalline polymer, and refers to the glass transition point when the resin material is an amorphous polymer.

Further, in the carbon fiber tape material according to the present invention, it is preferable that the fabric is bonded to at least one side of the carbon fiber bundle via a binder, thereby integrating the carbon fiber bundle. The schematic perspective view of the carbon fiber tape material 300 shown in FIG. ), a cloth 303 having regularity is arranged. The fabric 303 is integrated with the carbon fiber bundles 302 via a resin binder 304 adhered to the surface of the carbon fiber bundles 302 for the purpose of retaining the shape of each carbon fiber bundle 301 .

Furthermore, in the carbon fiber tape material according to the present invention, it is preferable that the ground and the binder are partially adhered. As an example of partial bonding, in the embodiment shown in FIG. 3, of the resin binder 304 provided on the surface of the carbon fiber bundle group 302, only the resin binder 304 in the region surrounded by the bonding region 305 is melted. , contributes to adhesion between the fabric 303 and the carbon fiber bundle group 302 . The bonding regions 305 are not continuously formed in the fiber orientation direction of the carbon fiber bundles 301 but discretely (intermittently) in at least a portion of the carbon fiber tape material 300 . Here, the “bonded region” refers to a region where the cloth 303 and the carbon fiber bundle group 302 are bonded together via the resin binder 304 . The cloth 303 and the carbon fiber bundle group 302 are bonded together in at least a part of the bonding region, thereby being integrated with each other, and the shape of the carbon fiber tape material can be maintained. The carbon fiber tape material 300 shown in FIG. 3 has the same configuration as the carbon fiber tape material 200 shown in FIG. 2 except for the above points.

In the present invention, it is preferable that the bonding regions 305 are discretely formed in the fiber orientation direction of the carbon fiber bundle 301 as described above. When the bonding area 305 extends over the entire tape and the carbon fiber bundle group 302 and the fabric 303 are bonded over the entire tape, the position of the thermoplastic fibers constituting the fabric is completely fixed by bonding with the carbon fiber bundle. As a result, the original deformability of the fabric is reduced. In FIG. 3, the bonding regions 305 are dispersed discretely in the fiber orientation direction, leaving room for the fabric to locally move freely, so that the deterioration of the deformability of the fabric due to bonding can be suppressed. can be done.

FIG. 4 shows a schematic plan view of a fabric according to the invention. In this embodiment, the fabric 403 is a warp-knitted fabric with a chain stitch and an inlay (insertion). It is important in the present invention that the fabric is composed of at least two different thermoplastic resins. In one example of this embodiment, the chain portion 406 is made of a first thermoplastic resin 408 and the insertion portion 407 is made of a second thermoplastic resin 409 .

FIG. 5 is a schematic plan view of a carbon fiber tape material using the knitted fabric shown in FIG. 4 as the fabric. In order to explain the concept of the present invention, FIG. 5(a) schematically shows a carbon fiber tape material before molding, and FIG. 5(b) schematically shows a carbon fiber tape molded product after being impregnated with resin and molded. ing. In FIG. 5( a ), a knitted fabric configured by using a first thermoplastic resin 508 for the chain portion and a second thermoplastic resin 509 for the insertion portion is attached to the carbon fiber group 502 and integrated. , the carbon fiber tape material 500 is constructed. Here, by curing and molding at a curing temperature higher than the softening point T1 of the first thermoplastic resin 508 and lower than the softening point T2 of the second thermoplastic resin 509, as shown in FIG. , the first thermoplastic resin 508 is melted. As a result, the volume occupied by the first thermoplastic resin 508 before melting is reduced, and a molded product having a reduced thickness, that is, a molded product having a high carbon fiber occupation ratio can be obtained.

Here, the first thermoplastic resin fibers composed of the first thermoplastic resin 508 and the second thermoplastic resin fibers composed of the second thermoplastic resin 509 are positioned according to regularity. preferably. Only the second thermoplastic resin fibers remain in the fabric after molding. Since the second thermoplastic resin fibers are regularly arranged on the tape of the fabric after molding, it is possible to obtain a uniform molded product with little variation in interlayer toughness depending on the part of the molded product.

Arrangements of the first thermoplastic resin fibers and the second thermoplastic resin fibers are not limited to specific locations. For example, in this embodiment, the first thermoplastic resin 508 may be used for the insert portion and the second thermoplastic resin 509 for the chain portion. In addition to the knitted fabric of warp knitted structure by chain stitch and inlay (insertion), for example, warp knitted structure of chain stitch and half structure, tulle structure, warp knitted structure, weft knitted structure, woven structure and other fabric forms You can use it for

FIG. 6 is a schematic plan view of a carbon fiber tape material using a plain weave fabric as the fabric. As in FIG. 5, FIG. 6(a) schematically shows the carbon fiber tape material before molding, and FIG. 6(b) schematically shows the carbon fiber tape molded product after being impregnated with resin and molded. In FIG. 6( a ), a plain weave fabric composed of a first thermoplastic resin 608 as warp and a second thermoplastic resin 609 as weft is attached to and integrated with carbon fiber group 602 , A carbon fiber tape material 600 is constructed. Here, by curing and molding at a curing temperature higher than the softening point T1 of the first thermoplastic resin 608 and lower than the softening point T2 of the second thermoplastic resin 609, as shown in FIG. , the first thermoplastic resin 608 is melted. As a result, the volume occupied by the first thermoplastic resin 608 before melting is reduced, and a molded product having a reduced thickness, that is, a molded product having a high carbon fiber occupation ratio can be obtained.

The carbon fiber tape material according to the present invention configured as described above can exhibit the following shear deformation performance. That is, the tensile load F [N] measured at the shear angle θ [°] in the range of 0° to 45° using the picture frame method by the two-sided gripping method is applied when the shear angle θ [°] is 0° to 1.5°. There is no maximum value of tensile load F [N] between 0 °, and the maximum value of tensile load F [N] measured in the range of shear angle θ [°] from 0 ° to 45 ° is 0.5 [N ] and ΔF/Δθ is greater than 0.1 and less than 1.0 when θ [°] is between 0.1° and 1.0°.

A picture frame method using a two-sided gripping method, which is a method for evaluating shear deformation performance, will be described. FIG. 8 shows a schematic diagram of the picture frame method with two-sided grasping method. One or a plurality of carbon fiber tape materials 800 having a length of 220 mm are arranged in parallel without gaps, and prepared so that the total width is 150 mm. After marking the gripping portion 813 so that the gripping interval is 200 mm, the carbon fiber tape material 800 is placed so that the gripping portion 813 is 200 mm, the measurement angle α [°] is 90°, and the longitudinal direction of the carbon fiber tape is the picture plane. The two sides of the carbon fiber tape are attached to the picture frame jig 815 so as to be parallel to the two sides 814 that do not grip the carbon fiber tape material of the frame. After the picture frame jig was attached to a universal testing machine (not shown) so that the measurement angle α [°] was 90°, the picture frame jig was pulled vertically at a speed of 50 mm / min, and the tensile force F [ N] and the measurement angle α. After that, the shear angle θ [°] calculated from the following equation and ΔF/Δθ when θ [°] is between 0.1° and 1.0° are calculated.
θ [°] = 90° - α [°]

FIG. 9 shows an example of a shear angle-tensile load graph when the picture frame method by the two-sided gripping method is applied to the carbon fiber tape material according to the present invention. FIG. 9(a) is a shear angle-tensile load graph when the shear angle θ [°] is tested from 0 to 45, and FIG. It is the graph which expanded the neighborhood.

In the carbon fiber tape material according to the present invention, when the test is performed with the shear angle θ [°] from 0° to 45°, the tensile load F preferably does not have a maximum value. When the maximum tensile load F [N] has a shear angle θ [°] between 0° and 1.0°, the carbon fiber tape material reaches a shear angle θ [°] of 1.0° It means that it cannot maintain its shape and has collapsed. In this case, the value of ΔF/Δθ cannot be evaluated as the shear deformation performance of the carbon fiber tape material.

In the carbon fiber tape material according to the present invention, when the shear angle θ [°] is between 0° and 1.0° and the tensile load F does not have a maximum value, the shear angle θ [°] is from 0.1° ΔF/Δθ between 1.0° is preferably less than 1.0, more preferably less than 0.4, and even more preferably less than 0.2. When ΔF/Δθ is 1.0 or more, a large force is required to shear deform the carbon fiber tape material, and good conformability to the mold is achieved when the fiber placement method is used to align and arrange the carbon fiber tape material in the mold. is not obtained. On the other hand, ΔF/Δθ is preferably greater than 0.1. When ΔF/Δθ is 0.1 or less, the carbon fiber tape material undergoes a large shear deformation by application of a slight force, and the stability of the carbon fiber tape material is impaired.

When the carbon fiber tape material according to the present invention is tested with a shear angle θ [°] from 0 ° to 45 °, the maximum value of the tensile load F is preferably greater than 0.5 N, and greater than 1.0 N is more preferred. When the test is performed with the shear angle θ [°] from 0° to 45°, if the maximum value of the tensile load F is 0.5 N or less, the carbon fiber tape material may cause the carbon fiber bundle and the cloth material to peel off. Unable to maintain shape.

The carbon fiber tape material of the present invention is used for reinforcing fiber laminates. The reinforcing fiber laminate is obtained by arranging and laminating the carbon fiber tape material of the present invention and fixing at least a part of the layers to maintain its shape. By adopting such a configuration, the gap between the carbon fiber bundles forming the reinforcing fiber laminate can be set to an arbitrary distance and arranged. As a result, the fluidity of the matrix resin during molding can be secured, and the types of resin to be injected and the width of the process window can be widened, and productivity can be improved.

Moreover, it is preferable to impregnate a matrix resin into the reinforcing fiber laminate using the carbon fiber tape material to obtain a fiber-reinforced resin molding. By adopting the above configuration, the obtained fiber-reinforced resin molded article can be completely impregnated with the resin to the inside thereof, and can have high mechanical properties.

EXAMPLES The carbon fiber tape material according to the present invention will be described based on examples. Table 1 shows the conditions and results of Examples and Comparative Examples.

(Example 1)
<Reinforcing fiber bundle>
As the reinforcing fiber bundle, carbon fiber "Torayca" (registered trademark) T800SC manufactured by Toray Industries, Inc., which had undergone sizing treatment in advance, and had a carbon fiber filament count of 24,000 (N=24K) was used.

<Fabric>
As the fabric, a regular knitted fabric (material: polyamide, basis weight: 6 g/m ² ) warp-knitted in a structure using chain stitch and inlay (insertion) using a tricot machine was used.

<Measurement of elongation rate of fabric>
The elongation rate of the fabric was measured as follows with reference to JIS L 1096 8.16.1. That is, the fabric was cut into a width of 50 mm and a length of 300 mm so that the wale direction of the fabric was aligned with the longitudinal direction, and a grip portion was marked so that the grip interval was 200 mm. After fixing one end of the test piece with a clamp, a load of 80 mN/50 mm was gently applied and the length between marks was measured after holding for 1 minute. As a result of calculating the elongation rate of the fabric from the following formula, the elongation rate was 48%.
E _p =[(L ₁ −L ₀ )/L ₀ ]×100
E _p : Fabric elongation rate (%)
L ₀ : Fabric length between original marks (mm)
L ₁ : Fabric length when load is applied (mm)

<Carbon fiber tape material>
Using a carbon fiber bundle manufacturing apparatus (not shown), one carbon fiber bundle is pulled out from the bobbin, and the width is narrowed without slitting while adjusting the thickness, and then heat-meltable binder particles having a softening point temperature of 80 ° C. ( average particle size: 0.2 mm) was sprinkled on the surface of the carbon fiber bundle. The weight ratio of the binder particles is 5% (the weight of the obtained carbon fiber bundle is taken as 100%), and then melted and cooled to fix the shape of the yarn width 4.8 mm. of carbon fiber bundles were obtained.

After arranging 10 carbon fiber bundles in parallel in the longitudinal direction, a first thermoplastic resin (material: polyamide) having a softening point temperature T1 (° C.) of 110° C. and a second A knitted fabric (fabric) having a thermoplastic resin (material: polyamide) softening point temperature T2 (° C.) of 200° C. is placed and heated at 90° C. to melt the binder particles, thereby forming a knitted fabric and a carbon fiber bundle. were partially bonded and integrated through binder particles as shown in FIG. In this way, a carbon fiber tape material having a width of 50 mm, a tape material basis weight of 212 g/m ² and each gap between carbon fiber bundles of 0.2 mm was obtained.

<Deformability of carbon fiber tape material>
As a deformability evaluation of the carbon fiber tape material, a picture frame method using a two-sided gripping method was performed. Three pieces of carbon fiber tape material having a length of 220 mm and a width of 50 mm were arranged in parallel, and a grip portion was marked so that the grip interval was 200 mm. Then, the three carbon fiber tape materials arranged in parallel are attached to the picture frame jig shown in FIG. measurement was carried out. As a result, the tensile load F [N] in the range of the shear angle θ [°] from 0° to 45° has a maximum value larger than 0.5 [N], and the maximum value is the shear angle θ [° ] was not present between 0° and 1.0°. Then, ΔF/Δθ=0.22, and it was confirmed that the carbon fiber tape material exhibits good deformability against in-plane shear force.

<Reinforcing fiber laminate>
Using a fiber placement device (not shown), the carbon fiber tape materials obtained as described above were placed on the frame so that a gap of 0.7 mm was provided between each carbon fiber tape material. A sheet base material was produced by arranging the carbon fiber tape material in the same direction and repeating the arrangement while cutting the carbon fiber tape material so as to form a square shape of 300 mm×300 mm. Adjacent carbon fiber tape materials were bonded together by wrapping adjacent knitted fabrics by 1 mm and heating the wrapped portion at 100° C. to produce a sheet base material.

The obtained sheet base material is placed in a pyramid (tetrahedral) mold (bottom: equilateral triangle with 14 cm sides, height: 7 cm), and the upper mold is lowered while tension is applied to the sheet base material to press. After shaping, the lower mold was heated at 100° C. for 10 minutes. As a result, the sheet substrate exhibited good shapeability without large wrinkles. After forming the sheet base material layer by layer in a pyramid-shaped mold in the same manner, the upper mold was closed and the lower mold was heated at 100° C. for 10 minutes. As a result, a good reinforcing fiber laminate was obtained without large wrinkles.

<Molded body>
The resulting reinforcing fiber laminate was placed in the pyramid-shaped lower mold described above, vacuum bagged using a bag film, and then the mold was placed in an oven at an ambient temperature of 100°C. After that, a matrix resin (epoxy resin) was injected and cured in an atmosphere of 170°C. As a result, the carbon fiber content of the molded article was 59%, and a favorable molded article having a high carbon fiber content without resin-unimpregnated portions was obtained. As a result of carrying out CAI (compression after impact test) using this molded product, good results with excellent impact resistance were obtained. Table 1 shows the CAI ratio of each example and comparative example when the value of this test result is 100.

(Example 2)
A carbon fiber tape was obtained in the same manner as in Example 1 except for the following points.
- As the fabric, a regular knitted fabric (material: polyamide, basis weight: 6 g/m ² ) warp-knitted in a chain + half structure using a tricot machine was used.
A knitted fabric in which the softening point temperature T1 (°C) of the first thermoplastic resin is 160°C and the softening point temperature T2 (°C) of the second thermoplastic resin is 180°C was used as the fabric.

<Measurement of elongation rate of fabric>
As a result of measuring the elongation rate in the same manner as in Example 1, the elongation rate in the wale direction was 35%.

<Deformability of carbon fiber tape material>
As a result of carrying out the picture frame method by the two-sided gripping method in the same manner as in Example 1, the maximum value of the tensile load F [N] in the range of the shear angle θ [°] from 0° to 45° was 0.5. [N], and the maximum value did not exist when the shear angle θ [°] was between 0° and 1.0°. Then, ΔF/Δθ=0.36, and it was confirmed that the carbon fiber tape material exhibits good deformability against in-plane shear force.

<Reinforcing fiber laminate>
As a result of carrying out in the same manner as in Example 1, a good reinforcing fiber laminate was obtained with no kinks or wrinkles in the sheet base material.

<Molded body>
As a result of carrying out in the same manner as in Example 1, the carbon fiber content of the molded product was 57%, and a favorable molded product with a high carbon fiber content without resin-unimpregnated portions was obtained. CAI (compression after impact test) was performed using this molded product, and as a result of nominal conversion to the carbon fiber content of Example 1, the CAI ratio was 105, and good results with excellent impact resistance were obtained. .

(Example 3)
A carbon fiber tape was obtained in the same manner as in Example 1 except for the following points.
- A plain weave fabric (warp and weft material: polyamide, weight per unit area: 6 g/m ² , fiber orientation: ±45°) was used as the fabric.
- As the fabric, a fabric having a softening point temperature T1 (°C) of the first thermoplastic resin of 130°C and a softening point temperature T2 (°C) of the second thermoplastic resin of 200°C was used.

<Measurement of elongation rate of fabric>
As a result of measuring the elongation percentage in the same manner as in Example 1, the elongation percentage in the wale direction was 55%.

<Deformability of carbon fiber tape material>
As a result of carrying out the picture frame method by the two-sided gripping method in the same manner as in Example 1, the maximum value of the tensile load F [N] in the range of the shear angle θ [°] from 0° to 45° was 0.5. [N], and the maximum value did not exist when the shear angle θ [°] was between 0° and 1.0°. Then, ΔF/Δθ=0.19, and it was confirmed that the carbon fiber tape material exhibited good deformability against in-plane shear force.

<Reinforcing fiber laminate>
As a result of carrying out in the same manner as in Example 1, a good reinforcing fiber laminate was obtained with no kinks or wrinkles in the sheet base material.

<Molded body>
As a result of carrying out in the same manner as in Example 1, the carbon fiber content of the molded product was 60%, and a good molded product with a high carbon fiber content without resin impregnated portions was obtained. CAI (compression after impact test) was performed using this molded product, and as a result of nominal conversion to the carbon fiber content of Example 1, the CAI ratio was 97, and good results with excellent impact resistance were obtained. .

(Comparative example 1)
A carbon fiber tape was obtained in the same manner as in Example 1 except for the following points.
- A knitted fabric with a chain + inlay (insertion) structure composed of one type of thermoplastic fiber (material: polyamide, basis weight: 6 g/m ² ) and having a softening point temperature of 200°C was used.

<Measurement of elongation rate of fabric>
As a result of measuring the elongation percentage in the same manner as in Example 1, the elongation percentage in the wale direction was 51%.

<Deformability of carbon fiber tape material>
As a result of carrying out the picture frame method by the two-sided gripping method in the same manner as in Example 1, the maximum value of the tensile load F [N] in the range of the shear angle θ [°] from 0° to 45° was 0.5. [N], and the maximum value did not exist when the shear angle θ [°] was between 0° and 1.0°. Then, ΔF/Δθ=0.24, and it was confirmed that the carbon fiber tape material exhibited good deformability against in-plane shear force.

<Reinforcing fiber laminate>
As a result of carrying out in the same manner as in Example 1, a good reinforcing fiber laminate was obtained with no kinks or wrinkles in the sheet base material.

<Molded body>
As a result of carrying out in the same manner as in Example 1, the carbon fiber content of the molded article was 47%, and the molded article had a low carbon fiber content although there were no portions not impregnated with resin.

(Comparative example 2)
A carbon fiber tape was obtained in the same manner as in Example 1 except for the following points.
- A nonwoven fabric composed of one type of thermoplastic fiber (material: polyamide, basis weight: 6 g/m ² ) and having a softening point temperature of 130°C was used.

<Measurement of elongation rate of fabric>
As a result of measuring the elongation rate in the same manner as in Example 1, the elongation rate in the wale direction was 8%.

<Deformability of carbon fiber tape material>
As a result of carrying out the picture frame method by the two-sided gripping method in the same manner as in Example 1, the maximum value of the tensile load F [N] in the range of the shear angle θ [°] from 0° to 45° was 0.5. [N], and the maximum value did not exist when the shear angle θ [°] was between 0° and 1.0°. Then, ΔF/Δθ=1.16, confirming that the carbon fiber tape material has poor deformability against in-plane shear force.

<Reinforcing fiber laminate>
As a result of carrying out in the same manner as in Example 1, it was confirmed that the sheet base material was twisted at a plurality of locations in the reinforcing fiber laminate.

<Molded body>
As a result of carrying out in the same manner as in Example 1, the carbon fiber content of the molded product was 58%, and a molded product with a high carbon fiber content was obtained. CAI (compression after impact test) was carried out using this molded product, and as a result of nominal conversion to the carbon fiber content of Example 1, the CAI ratio was 78, resulting in poor impact resistance.

Since the carbon fiber tape material of the present invention and the reinforcing fiber laminate using the same are excellent in the impregnating property of the matrix resin, the molded article obtained using such a reinforcing fiber laminate is particularly suitable for aircraft, automobiles, ships, etc. It is also suitably used for large members such as windmill blades and members for general industrial use.

100, 200, 300, 500, 600, 800 carbon fiber tape materials 101, 201, 301, 501, 601 carbon fiber bundles 102, 202, 302, 502, 602 carbon fiber bundle groups 103, 203, 303, 403, 503, 603, 703 Fabrics 106, 206, 306 Gap
204, 304 resin binder 305 bonding region 406 chain portion 407 insertion portion 408, 508, 608 first thermoplastic resin 409, 509, 609 second thermoplastic resin 710 clamp 711 mark 813 grip portion 814 grips the carbon fiber tape material 2 sides that are not open 815 Picture frame jig

Claims (10)

A carbon fiber tape material in which a carbon fiber bundle group in which a plurality of carbon fiber bundles are aligned in one direction and a regular cloth are integrated, and which satisfies the following (a) and (b). A carbon fiber tape material characterized by:
(a) the fabric is composed of at least two different thermoplastic resins (b) the carbon fiber tape material has a basis weight between 100 g/m ² and 400 g/m ² The fabric is composed of at least a first thermoplastic resin and a second thermoplastic resin, and the softening point T1 (° C.) of the first thermoplastic resin and the softening point T2 (° C.) of the second thermoplastic resin The carbon fiber tape material according to claim 1, wherein and have the following relationship.
10<T2-T1<120 The carbon fiber tape material according to claim 1 or 2, characterized in that the basis weight of said fabric is between 2 g/m ² and 30 g/m ² . The carbon fiber tape material according to any one of claims 1 to 3, characterized by having a gap of 0.1 mm to 1 mm between the carbon fiber bundles. 5. The carbon fiber tape material according to any one of claims 1 to 4, characterized in that the fabric is bonded to at least one side of the carbon fiber bundle via a binder so that the carbon fiber bundle is integrated. The carbon fiber tape material according to any one of claims 1 to 5, characterized in that the fabric and the binder are partially adhered. The structure of the fabric is a knitted fabric, and the first thermoplastic resin fibers composed of the first thermoplastic resin and the second thermoplastic resin fibers composed of the second thermoplastic resin are respectively The carbon fiber tape material according to any one of claims 1 to 6, wherein the knitted fabric is formed by positioning according to regularity. The structure of the fabric is a woven fabric, and the first thermoplastic resin fibers composed of the first thermoplastic resin are used for the warp yarns, and the second thermoplastic resin fibers composed of the second thermoplastic resin are used for the weft yarns. or a first thermoplastic resin fiber composed of a first thermoplastic resin is used for the weft and a second thermoplastic resin fiber composed of a second thermoplastic resin is used for the warp The carbon fiber tape material according to any one of claims 1 to 6. A laminate using the carbon fiber tape material according to any one of claims 1 to 8. A molded article using the laminate according to claim 9 .

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