KR100225295B1 - Thermo-setting phenolic resin's glass fiber fabric for bulletproof panel - Google Patents

Abstract

To provide a low-cost thermosetting phenolic resin impregnated glass fiber fabric for bulletproof board material.

Weaving fabrics of 625 ± 31g / m ² and 1067 ± 12.7mm width per unit area with a density of 20 ± 1 counts / inch for weft and warp, respectively, with 4 × 4 baskets of glass fiber. (F420 and PVB mixture) A resin mixture, impregnated in the glass fiber fabric with a resin impregnation amount of 26 ± 2% and a viscosity of 5 ± 2%, to 846 ± 42 g / m ² using a high temperature compression molding machine and a press machine. It is cold molded at ℉.

Description

Thermosetting Phenolic Resin Impregnated Glass Fiber Fabric for Bulletproof Board

TECHNICAL FIELD The present invention relates to a glass fiber reinforced thermosetting phenolic prepreg made of a bulletproof plate, and in particular, for producing a bulletproof plate that is applied to a vehicle and a ground structure, a composite material made of extremely excellent anti-ballistic performance but easy to manufacture and inexpensive to produce. It relates to a glass fiber fabric for composite (Composite Raw Material).

In general, anti-ballistic materials have been developed around armor materials that protect equipment and life for military purposes, and there is a steady demand even without considering the economic feasibility according to their special purpose of use.

Recently, however, due to the characteristics of mobile equipment that requires agile mobility, lightweight and fiber-reinforced composites with excellent protection performance have been used for light weight, and are representative of aramid-based Kevlar fibers and polyethylene-based Spectra. Fiber and glass fiber S2-glass.

The antiballistic performance of these products is due to the strong tensile strength of the functional fibers and the rapid dispersing speed of the energy, and how the fibers are arranged even in the same fiber is found to be a major factor to increase the protective performance.

The principle of fiber reinforced bulletproof boards can be explained by the energy conversion process. As a bullet with a constant mass flies at high speed, its velocity energy is concentrated on the bulletproof board at the point of impact. At this time, the velocity energy transmitted inside the plate is transformed into a shock wave, the impact energy is dispersed in all directions through the reinforcing fiber, wherein the stretch deformation of the fiber is wider the more the absorption of energy, the better ballistic performance.

Therefore, the functional fiber used as the bulletproof plate must have sufficient tensile strength to withstand the impact in order to disperse the shock wave farther, and a fast energy propagation speed is required so that energy can be transferred before breaking into shear deformation.

The antiballistic material that has been produced so far has been made by using a high tensile fiber (a) as a woven fabric in the form of dense fabrics or unidirectional tapes. Due to the wave phenomenon, the tensile strength of the fiber may be lowered. In particular, the fabric has a low ballistic efficiency because it does not disperse the impact caused by the velocity energy of the bullet that has been flying at high speed. However, it is difficult to form and handle in a desired shape because it is not in the form of a fabric, and the protective performance is deteriorated due to the disturbance of the arrangement of the fiber during operation.

Conventional antiballistic sheet material also obtains antiballistic effect only by relying only on the excellent tensile strength of expensive functional fibers, and the application of the fiber array method by the fabric structure which is most suitable for energy dispersing which has a great influence on the improvement of protection performance, lamination and molding It is not properly exhibited the excellent protective properties of the functional fiber as it is produced without sufficient consideration for the deterioration of the protective performance due to the disturbance of the fiber arrangement generated during the handling and processing of the back. In addition, despite the properties of bulletproof boards that require extreme reliability, there were also disadvantages in bringing about changes in the protection performance according to the skill of the operator.

An object of the present invention is to replace the conventional expensive raw materials for high-performance fiber-reinforced bulletproof plate material, using an inexpensive and easy-to-use E-glass glass fiber, but weaving the arrangement of the fibers into a specific fabric tissue to achieve the optimal protection performance It can be widely distributed inexpensive bulletproof board material by providing a breakthrough new bulletproof material that is easy to handle and maximizes productivity by manufacturing the form in a prepreg impregnated with a thermosetting phenolic resin having excellent heat resistance characteristics. It is to secure the way.

The present invention is not the expensive special fibers listed above, but weaving low-cost and generalized E-glass into a specific structure to dramatically increase the impact energy transmission rate of bullet bulletproof thermosetting phenolic resin impregnated glass for bulletproof plate material always exerts the best ballistic performance Provides textile fabrics.

The present invention is also possible to mass production by reducing the cost and ease of manufacture by pre-impregnating semi-prepreg by thermosetting phenolic resin on the fabric in order to minimize the cutting and lamination convenience and fiber arrangement disturbance when manufacturing the plate material The present invention provides a thermosetting phenolic resin impregnated glass fiber fabric for a bulletproof plate material which can be widely applied to light bulletproof vehicles and protective structures.

1 is a cross-sectional view of a conventional dense structured glass fiber fabric.

2 is a cross-sectional view of a thermosetting phenol resin-impregnated glass fiber fabric for a bulletproof board material according to the present invention.

* Explanation of symbols for main parts of the drawings

1: ER 390 tex roving yarn 2: weft yarn

3: slope

In Fig. 2, after weaving into a 4 × 4 basket tissue having a weight of 626 ± 31 g / m ² per unit area using a glass fiber roving yarn 1 having a weight of 390 tex, the weight of the weft yarn 2 and the warp yarn 3 respectively. Modified phenol-based [F420-Faiba Co., Ltd.-plasticizer mixture] The resin mixture is impregnated and then semi-prepreg.

At this time, in order to maintain the fiber binding and the optimum mechanical properties in the molded sheet material, the content of the resin solid required for the roving plate material is 30 ± 10%, and the viscosity of the phenolic resin solution required for impregnation and the preliminary material of the molded plate material In order to optimize the prepreg, the thermosetting phenolic resin-impregnated glass fiber fabric for a bulletproof plate material of the present invention is prepared by adjusting the volatile content of the prepreg to 7 ± 4% so that the total weight of the prepreg is 850 ± 100 g / m ² .

As for the protection mechanism of the bulletproof board, how much energy is absorbed and converted as described above is the core of the old technology. The anti-ballistic sheet material of the present invention is the generation of twisting and wave generated in the fabric of dense plain weave structure (see Fig. 1) in the arrangement of the fibers in order to achieve the perfect protection performance from personal mobile phones using small diameter ordinary bullet. In order to suppress the ER 390 texture, the 4 × 4 basket structure (see Fig. 2) that weaves four strands of ice sand at once can be used to obtain a material with excellent formability and handling while exhibiting similar protective performance as one-way tape. It was. In the present invention, the selection of roving yarn of ER 390tex is the result of countless experiments, and when a larger amount of fiber is used, the impregnability of the resin becomes worse and a good plate cannot be obtained. Can not be suppressed, the protection performance tends to be poor.

On the other hand, in the present invention, in order to improve the handling and productivity of the basket structure and to satisfy the basic performance of the cold plate material, pre-impregnated and semi-cured thermosetting phenol resin having a self-extinguishing, the impregnation amount of glass fiber and synthetic resin Many ballistic tests have been derived from the results to maintain the proper mix ratio that satisfies both the maintenance of the structure and the dispersion of fire energy.

The thermosetting phenolic resin impregnated glass fiber fabric for the bulletproof plate material is manufactured by forming a bulletproof plate material by laminating a plurality of layers as necessary in thickness according to the ballistic performance required by the user, inserting them into a mold, and molding them with heat and pressure.

The hot press molding is carried out at low temperature of 250 ± 10 ° F using a high temperature compression molding machine (autoclave) or a press such as a press at a pressure of 5-30 g / m ² depending on the molding method.

The bulletproof plate material of the present invention is cut and laminated unlike the conventional method for manufacturing a bulletproof plate material in order to overcome the problems of tensile strength defects and impact dispersibility appearing on the fabric, and difficulty in manufacturing the shape of the one-way tape yarn and difficulties in working. Due to the characteristics of the 4 × 4 basket structure, while being easily woven, the fiber has almost a straight line with a shape similar to that of a one-way tape by minimizing the bending of the fiber. It is the theoretical basis of the present invention to increase the ballistic effect by rapidly dispersing the penetration energy of the bullet which is transmitted to the surroundings through the tissue at a high speed and concentrated at the impact point in a large area.

As described above, the bulletproof plate material of the present invention is a thermosetting phenolic resin impregnated glass fiber fabric, which is a fabric that is easy to cut and laminate, and is a 4 × 4 basket structure, and has almost no bends, so it is a flat fabric close to a straight line. Impact energy is transmitted to the surroundings at high speed through the fiber tissue.

Since the penetration energy of bullets concentrated at the impact point is rapidly dispersed in a large area, it is natural that the protection effect is significantly increased.

Claims (1)

A 4 × 4 basket woven from fiberglass, weaving ER 390 roving yarns with 626 ± 31 g / m ² fabric per unit area at a density of 20 ± 1 counts / inch on weft and warp yarns, respectively. was impregnated with a plasticizing material mixture) a resin mixture content of the cured resin solid content as a prepreg is 30 ± 10% and the content of the resin-volatile content was 7 ± 4% and the total weight is 850 ± 100g / m ² by the hot compression molding machine such that the A thermosetting phenolic resin impregnated glass fiber fabric for bulletproof boards, characterized in that it is molded at 250 ± 10 ° F. under a pressure condition of 5-30 g / m ² according to the molding method using a molding facility such as an autoclave or a press.