JPH0736745Y2 - Protective material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a laminate formed by further stacking a composite material in which a synthetic fiber cloth is embedded in a matrix resin. More specifically, it relates to a protective material having a colored layer provided on the surface of the laminate.

(Prior art) In recent years, a protective plate for protecting the human body or important equipment from the impact of explosive debris, sharp projections, etc. is made of high-strength synthetic fiber such as aromatic polyamide, polyvinyl alcohol or polyethylene. A composite sheet obtained by laminating a composite material sheet in which a cloth is embedded as a reinforcing material in a matrix resin is used.

A coating technique is generally adopted for coloring such molded articles.

On the other hand, there is also known a method in which a pigment is added to a matrix resin that embeds a fiber cloth in the process of producing a laminate, and the laminate is surface-coated.

(Problems to be solved by the present invention) However, such a high-strength synthetic fiber usually has a very high degree of molecular orientation and is difficult to be dyed or colored by adding a pigment to a polymer. Therefore, a method using a coating technique is generally adopted. ing. However, these coated objects have the drawback that they are easily peeled off not only by collision but also by impact or scratching during normal use, and the ground color of the reinforcing material of the laminate is exposed, and the surface quality is significantly impaired. Was there.

On the other hand, the method of coating the surface by adding a pigment to the matrix resin has a drawback that the resin is easily peeled off together with the peeling of the surface coating, and the color of the reinforcing material is easily exposed.

The object of the present invention is to improve the above-mentioned defects of the prior art, and in a protective material having a colored surface, the colored surface can be easily formed and can be applied to a three-dimensional curved surface. It is intended to provide a protective material having a surface-colored coating excellent in durability such as property.

(Means for Solving Problems) The present invention adopts the following configuration in order to achieve such an object.

That is, in the protective material of the present invention, the colored layer composed of the colored cloth and the matrix resin is formed integrally with at least the outermost layer of the laminated layer composed of the reinforcing fiber cloth and the matrix resin, and The weight ratio of the matrix resin in the coloring layer is 20 to 80%, the weight ratio of the matrix resin in the laminate layer is 5 to 20%, and the weight ratio of the matrix resin in the coloring layer is It is characterized by being richer than that in the laminate layer.

(Operation) The present invention will be described with reference to the drawings.

FIG. 1 is a partial sectional view showing an example of the protective material according to the present invention, and FIG. 2 is a partial sectional view showing another embodiment of the protective material of the present invention.

FIG. 1 has a structure in which a colored layer 1 composed of a colored cloth 2 and a matrix resin 3 is integrally formed on the surface of a laminate layer 4 composed of a reinforcing fiber cloth 5 and a matrix resin 3. Indicates protective material.

The colored fabric 2 is a fabric that has been colored according to the purpose of use by dyeing, dyeing or the like, and may be a single color or a multicolor such as a mottled pattern. The material of the cloth can be freely selected as long as it can be colored with a pigment or a dye, such as synthetic fiber or natural fiber, but a material having good adhesiveness to the matrix resin 3 is preferable.

As such a fabric structure, a woven fabric, a knitted fabric, a non-woven fabric, or the like can be applied and is selected according to the shape of the molded product or the purpose of use. Of these fabric structures, a woven fabric is preferable because it has a large hiding effect and is excellent in process workability such as resin impregnation.
When the molded product has a complicated curved surface, a uniform colored surface may be obtained by applying the knitted fabric.

In the present invention, at least one such colored fabric 2 is laminated on the outermost side of the laminate layer 4 to be integrated.

As the matrix resin 3 used in the protective material of the present invention, either a thermosetting resin or a thermoplastic resin can be used, but a thermosetting resin having high toughness and excellent moldability and morphological stability is used. It is preferably applied. Among such thermosetting resins, epoxy resins, unsaturated polyester resins, vinyl ester resins, and polyvinyl butyral / phenolic resins having particularly high toughness are most preferably adopted. That is, a resin having low toughness such as melamine resin is not suitable for the protective material of the present invention.

Further, it is more preferable to use the same resin for the colored layer 1 and the laminated body layer 4 from the viewpoint of moldability and adhesiveness with the laminated body layer 4. When the resins used in the two layers are different, the molded product may be distorted due to a difference in shrinkability, or the colored layer 1 and the laminated body layer 4 may be separated from each other.

The weight ratio of the resin in the colored layer 1 is preferably in the range of 20-80%. If the amount is out of this range, the adhesiveness to the laminate layer 4 is lowered if the amount is too small, and if the amount is too large, the resin layer formed on the surface becomes thick and is liable to be chipped by impact. The weight ratio of the resin in the colored layer 1 may be richer than the resin weight ratio in the laminate, as is clear from the weight ratio of the resin in the laminate 4 described later, and the most preferable range is 30 to 60%. That is, in the present invention, the weight ratio of the fabric of the colored layer to the matrix resin is richer than the weight ratio of the reinforcing fiber fabric of the laminate layer to the matrix resin, that is, the resin content is high. It is important that there is adhesion and lack of impact. As described above, the protective material of the present invention is designed so that the content of the matrix resin (weight ratio to the reinforcing material) is smaller than that of the ordinary composite material,
The easiness of breakage of the laminated body constituting the protective material due to this is utilized. In other words, the energy absorption due to the destruction of the laminate is used for the protective function. However, since the colored layer constitutes the aesthetic appearance of the protective material rather than the protective function, the adhesiveness with the protective material and the durability against damage due to impact are required. In the present invention, based on the function of the colored layer, the matrix resin weight ratio of the colored layer is set to be richer than at least the weight ratio of the laminated body according to the weight ratio of the laminated body. It is characterized by

The laminated body layer 4 is composed of the reinforcing fiber cloth 5, the foregoing and the matrix resin 3. As the fiber material constituting the reinforcing fiber cloth 5, nylon, polyester, polyethylene, polyvinyl alcohol, aromatic polyamide fiber, carbon fiber or the like can be applied, but in order to obtain excellent protection performance, tensile strength is 15 g / d or more, Polyethylene fibers, polyvinyl alcohol fibers, and aromatic polyamide fibers having a tensile elastic modulus of 300 g / d or more are preferably adopted. It is more preferable to use filament yarns in order to sufficiently exhibit the tenacity properties of the fibers.

A knitted fabric, a woven fabric, a non-woven fabric or the like can be applied as a fabric structure constituting the reinforcing fiber fabric 5, but a woven fabric is most preferably adopted from the viewpoint of protection.

The resin weight ratio in the laminate layer 4 is preferably 5 to 20.
It is characterized by being kept to a very small percentage. That is, by reducing the amount of the matrix resin, when a large impact energy is received, the laminated body is slightly more easily broken than an ordinary composite material,
This destructive property has succeeded in effectively absorbing the energy. If it is out of this range, that is, if it is too small, the moldability is not sufficient, and if it is too large, the reinforcing fiber bundle is constrained by the resin, so that the stress is not dispersed at the time of impact and the protective property is deteriorated. The most preferred range is 8
In this way, the colored layer 1 and the laminated body layer 4 are integrally molded to form the surface colored laminated body 6. This laminated body 6 is located on the outermost side of the protective material, and the laminated body 6 may be laminated with any number of laminated body layers 4 as required.

That is, specifically, the colored cloth 2 and the reinforcing fiber cloth 5
Is applied with a matrix resin 3 by a known method such as impregnation or (and) coating to form a prepreg sheet, and the required number of prepregs made of the reinforcing fiber cloth 5 are stacked on the outermost surface according to the purpose of protection. It can be generally formed by a method in which prepregs made of the colored cloth 2 are stacked and then integrally molded.

In addition, the shape of the molded product can be a desired shape such as a flat plate or a three-dimensional curved body.

2 shows a coating film 7 on the colored layer 1 of the protective material shown in FIG.
Is formed. A usual coating technique can be applied to the formation of the coating film 7. The properties and color tone of the coating film 7 are selected according to the purpose of use. This coating film can further improve the weather resistance, durability or surface quality of the protective material. That is, as the colored fabric 2, a nylon-based, polyester-based, polyacrylic-based fiber fabric or the like having excellent dyeability and adhesiveness is adopted, so that the coating film has high adhesiveness and high durability. It is what is done.

Further, by making the colors of the coating film 7 and the colored fabric 2 similar to each other, there is an advantage that even if the coating film 7 is peeled off, it can be made inconspicuous.

(Effect of the present invention) The protective material of the present invention can obtain an excellent surface coloring strength by integrally forming a colored cloth on the protective material and prevent the background color of the reinforcing fiber from being exposed.

Further, in the case of a coated product having a coating film on the surface, the durability of the colored layer can be remarkably improved, and even if the coating film is peeled off due to impact during use, it is possible to prevent deterioration of quality. Have the effect.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an example of a protective material according to the present invention. FIG. 2 is a partial sectional view showing another embodiment of the protective material according to the present invention. 1: Colored layer 2: Colored fabric 3: Matrix resin 4: Laminate layer 5: Reinforcing fiber fabric 6: Surface-colored laminate 7: Coating

Claims (3)

[Scope of utility model registration request] 1. A colored layer composed of a colored fabric and a matrix resin is disposed integrally with at least the outermost layer of a laminated layer composed of a reinforcing fiber fabric and a matrix resin, and is formed integrally with the colored layer. The weight ratio of the matrix resin is
20 to 80%, the weight ratio of the matrix resin in the laminate layer is 5 to 20%, and the weight ratio of the matrix resin in the colored layer is richer than that in the laminate layer. Protective material characterized by. 2. The protective material according to claim 1, wherein the matrix resins of the colored layer and the laminate layer are the same thermosetting resin. 3. At least fibers forming the reinforcing fiber fabric
The protective material according to claim 1, which is a filament yarn having a tensile strength of 15 g / d and a tensile elastic modulus of at least 300 g / d.