JP3076598U - Unidirectional fiber sheet - Google Patents

Abstract

(57) [Problem] To provide a monofilament fiber sheet which can be cut arbitrarily without any limitation in storage period, which is quick to produce, easy to change the standard, and the like. SOLUTION: The single-fiber fiber sheet has a base material of 10, 20, 50, 60.
The fiber bundle 30 is gathered and adhered by the prepreg method, and the thermoplastic adhesive 45 previously contained in the base material 10, 20, 50, 60 is permeated and adhered between the fiber bundles 30 through hot melting, and pressed by rolling. The fiber bundle 30 and the base materials 10, 20, 50, and 60 are integrally formed by caulking.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a unidirectional fiber sheet, and more particularly to a unidirectional fiber sheet that is convenient for storage and cutting.

[0002]

[Prior art]

 By the way, the unidirectional fiber sheet has a very wide range of applications because the fiber bundle itself is light in material, has no fear of corrosion, has high rigidity, has high tensile strength, etc. For example, there are excellent effects in the use of lightweight and high-strength products such as bicycle frames, notebook-type computer cases, etc., and the use of repair surfaces for structures. Generally, there are two types of unidirectional fiber sheets, such as a resin prepreg method and a woven knitting method.

In the prepreg method, after arranging the fiber bundles tightly in a certain direction (unidirectional), a small amount of resin is used to adhere the fiber bundles to each other so that the fiber bundles are shaped so as not to be bulky. There is a problem in that the manufacturing process is complicated and it is not easy to control the uniformity of the resin distribution because the arrangement order, density, etc. must be considered. Also, if ordinary cold-setting resin is used as a prepreg resin solution, the stickiness of the fiber bundle will be relatively shortened from the age-hardening of the cold-setting resin, and the shelf life will be shortened, resulting in quality defects. It is easy to use and causes confusion in preservation, and does not meet actual demand in use. When a thermoplastic resin is used for the adhesion of the fiber bundle, the thermoplastic resin has poor flexibility at room temperature, and therefore usually needs to be subjected to a preheat treatment, which is extremely inconvenient in use and lacks practicality.

[0004] The weaving method is formed by knitting and weaving a fiber bundle by the conventional weaving method, and has a serious disadvantage that the production speed is clearly slow in production, the production cost is high, and mass production is difficult. Since the vertically oriented fiber bundles are in a bundled shape, stress cannot be distributed and transmitted uniformly, and the properties of the material cannot be sufficiently exhibited.In addition, since the knitted and woven hole gaps are small, the penetration of resin can be prevented. If it is difficult and sticks to other articles, it may lose its robustness.

[0005]

[Problems to be solved by the invention]

 In view of the above-mentioned problems of the conventional unidirectional fiber sheet, the present invention provides a unidirectional fiber sheet that can be cut arbitrarily without any limitation on the shelf life, which can be produced quickly, the standard can be easily changed. The purpose is to:

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the present invention collects and adheres fiber bundles by a base material, and causes a thermoplastic adhesive contained in the base material to be permeated and adhered between the fiber bundles through hot melting by a prepreg method. In addition, the fiber bundle and the base material are integrally bonded by pressing rolling.

[0007] The base material is a woven fabric having a mesh, and the mesh formed in the woven fabric has a rectangular shape, or the base material is a thermoplastic non-woven fabric. The fiber bundle is fixed to the surface of one substrate by adhesive, or is fixed between both substrates by adhesive, or is fixed to the upper and lower surfaces of one substrate by adhesive. A fiber bundle, a polyurethane fiber bundle, or the like, or a mixture of any two or more of them, or the base material and the fiber bundle are coated with a room temperature effect type adhesive so that they can be directly bonded to a material, Then, it is more preferable.

In the present invention formed as described above, the fiber bundles are gathered and adhered by the base material, and the thermoplastic adhesive contained in the base material in advance is immersed between the fiber bundles by the prepreg method through hot melting. Since the fiber bundle and the base material are integrally bonded by squeezing and rolling, they can be used as various product cases and materials, and are cut into appropriate sizes or deformed shapes by custom-made methods at room temperature. A curable adhesive is applied to either the upper or lower surface layer of the base material, and the adhesive is impregnated into the mesh of the fabric in a sufficiently uniform distribution, adheres tightly to the structure, and solidifies after drying and curing. It can also be tied.

[0009]

[Embodiment of the invention]

 Hereinafter, the present invention will be specifically described based on embodiments, but the present invention is not limited to only this example. First, as shown in FIGS. 1 and 2, the present invention mainly comprises upper and lower substrates 10, 20 and a fiber bundle 30, of which:

The upper and lower base materials 10 and 20 are a kind of woven fabric in the present embodiment, and are formed by weaving long raw silks or strips, and a large number of rectangular meshes are woven along the weave. 11 and 21, and thermoplastic adhesive layers 12 and 22 are formed on the surfaces by prepreg treatment in a thermoplastic resin solution or spot injection.

The fiber bundle 30 is formed by gathering carbon fiber bundles, glass fiber bundles, polyurethane fiber bundles, or the like according to the properties of use, or by mixing two or more arbitrary fiber bundles 30 to form a parallel fiber bundle. It is laid between the upper and lower base materials 10 and 20 in the same arrangement and the same width as the upper and lower base materials 10 and 20.

The above is a description of the structure, features and positioning of a relatively preferred embodiment of the present invention. In the case of molding, as shown in FIGS. The upper and lower layers 10, 20 and the fiber bundle 30 are first preheated by the preheating roller 42 and the heating plate 43, and the release papers 13 and 23, Since the compression rolling temperature at this time is equal to or higher than the melting point of the thermoplastic adhesive layers 12 and 22 and equal to or lower than the melting point of the woven fabric (upper and lower substrates 10 and 20), the adhesive layers 12 and 22 are dissolved in a molten state, and the meshes 11, 21 and The fiber bundle 30 is impregnated into the gap between the fiber bundles 30 and the fiber bundle 30 is laid between the upper and lower base materials 10 and 20 by melt adhesion. Thereafter, the fiber bundle 30 and the upper and lower base materials 10 and 20 are opposingly heat-pressed and adhered to each other by the pressing roller 44, and at the same time, the release layers 13 and 23 are separated to form an adhesive layer between the upper and lower base materials 10 and 20. After the release of the release papers 13 and 23, the unidirectional fiber sheet is completed after the release of the release papers 13 and 23.

[0013] In addition to being usable as various product cases and materials, it is cut into various sizes or bumps in almost custom-made manner, and as shown in FIG. (Resin) is applied to either one of the upper and lower base materials 10 and 20 to improve the adhesive force of the surface area to be adhered using the meshes 11 and 21 of the woven fabric, and the adhesive is sufficiently distributed evenly. After the present invention is dried and hardened, it tightly adheres to the structure 46.

As shown in FIG. 4, the single-layer base material 50 and the fiber bundle 30 can be used by being consolidated. A pre-heat treatment is performed by a pre-heating roller 42 and a heating plate 43 to form a thermoplastic adhesive layer 51 for the prepreg 50 in a molten state. Further, the fiber bundle 30 and the substrate 50 are pressed against each other by a pressing roller 44. After cooling, the unidirectional fiber sheet is assembled and completed.

Next, as shown in FIG. 5, in the present invention, the two-layered fiber bundle 30 can be consolidated and used on the single-layered base material 60, and the release paper 40 and the base material can be similarly formed on molding. First, the fiber bundle 30 is preheat-treated by the preheating roller 42 and the heating plate 43 to melt the thermoplastic adhesive layer 61 for prepreg of the base material 60 in a molten state. The material 50 is subjected to opposing heat-pressing to bond it, and after cooling, a unidirectional fiber sheet is assembled and completed.

The substrate used in the above embodiments may be replaced with a thermoplastic non-woven fabric, and after the thermoplastic non-woven fabric is similarly pre-heated, the surface of the non-woven fabric is melted. The adhesive layer is formed, and the fiber bundles 30 are regularly laid between the base materials to be melt-bonded.

[0017]

[Effect of the invention]

 Therefore, as can be seen from the above description, the present invention has the following advantages and effects. That is, the fiber bundles 30 are gathered and adhered by the base materials 10, 20, 50, 60, and the thermoplastic adhesive contained in the base materials 10, 20, 50, 60 is heated and melted by the prepreg method. Since the fiber bundle 30 and the base material 10, 20, 50, 60 were integrally bonded by squeezing rolling, the fiber sheet of the present invention belongs to the dry bonding method, and the production is quick and standardized. It is easy to change, and there is no limitation on the storage period, and it can be cut and used arbitrarily, and the convenience and practicality in molding and use can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a molding mode of a first preferred embodiment of the present invention.

FIG. 2 is an exploded view of the embodiment.

FIG. 3 is a side view showing the completion of the assembly of the embodiment.

FIG. 4 is a side view of the second preferred embodiment of the present invention when the assembly is completed.

FIG. 5 is a side view of the third preferred embodiment of the present invention, showing the completion of assembly.

[Explanation of symbols]

 10 Upper substrate 11 Mesh 20 Lower layer substrate 21 Mesh 30 Fiber bundle 44 Press roller 45 Adhesive 50 Substrate 60 Substrate

Claims (8)

[Utility model registration claims] 1. A fiber bundle is gathered and adhered by a base material, a thermoplastic adhesive contained in the base material by a prepreg method is permeated and adhered between the fiber bundles through hot melting, and the fiber bundle is pressed by rolling. A unidirectional fiber sheet obtained by integrally bonding a substrate and a base material. 2. The unidirectional fiber sheet according to claim 1, wherein the substrate is a woven fabric having a mesh, and the mesh formed in the woven fabric has a rectangular shape. 3. The unidirectional fiber sheet according to claim 1, wherein said base material is a thermoplastic non-woven fabric. 4. The unidirectional fiber sheet according to claim 1, wherein said fiber bundle is adhesively fixed to a surface of one base material. 5. The unidirectional fiber sheet according to claim 1, wherein the fiber bundle is adhesively fixed between both substrates. 6. The unidirectional fiber sheet according to claim 1, wherein said fiber bundle is adhesively fixed to upper and lower surfaces of one base material. 7. The unidirectional fiber sheet according to claim 1, wherein said fiber bundle is formed by mixing a carbon fiber bundle, a glass fiber bundle, a polyurethane fiber bundle, or any two or more kinds. 8. The unidirectional fiber sheet according to claim 1, wherein the base material and the fiber bundle are coated with a room temperature effect type adhesive so that they can be directly bonded to a material.