Patent Application
20190104790
The present invention relates to a reinforcement fiber for protection products.
Since objects are often damaged due to an external force either in use or during transport, and athletes are often injured due to an external force in training or competitions, the prior arts provide a variety of protection products, such as luggage and protective gears, for people to choose according to demand.
In the preparation of the protection products in the prior arts, a single material (e.g., polypropylene) is first made into a sheet. Multiple sheets are woven into a woven fabric, and then multiple woven fabrics are laminated and molded to obtain the protection products. However, the protection products made of a single material only have quite limited impact resistance. When the protection products in the prior arts are subjected to a large external force, they will be broken and lose their protective function, thereby causing the damage to the objects and the injury of the athletes.
In order to improve the impact resistance of the conventional protection products, a conventional solution places a reinforcing film between two adjacent woven fabrics, and then processes molding to obtain another conventional protection product. However, the use of the reinforcing film increases the process complexity and production cost.
An objective of the present invention is to provide a reinforcement fiber for protection products. A reinforcement fabric woven from the reinforcement fiber can be simply molded into a protection product with good impact resistance, thereby reducing the process complexity and production cost of the protection products.
To achieve the foresaid objective, the present invention provides a reinforcement fiber for protection products. The reinforcement fiber comprises multiple filaments, each filament composed of a core and a shell formed around the core. A melting temperature of the shell is lower than a melting temperature of the core. The shell of each filament is attached to the shell of the adjacent filament.
The core is made of polypropylene copolymers or polypropylene homopolymers, and the shell is made of polyethylene copolymers, polyethylene homopolymers, polypropylene copolymers or polypropylene homopolymers.
The melting temperature of the core is between 160° C. and 180° C. and the melting temperature of the shell is between 120° C. and 150° C.
Based on the above technical means, the reinforcement fabrics woven from the foresaid reinforcement fiber can be manufactured into protection products with good impact resistance simply through heating and molding without using any reinforcing film. Therefore, the reinforcement fiber has the advantages of both manufacturing protection products with good impact resistance and reducing the process complexity and production cost.
The invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings and embodiment, rather than limiting the scope of the invention.
In order to illustrate the technical means adopted by the present invention to achieve the objective, the preferred embodiments of the present invention will be further described in detail below with reference to the drawings.
As illustrated in
In a preferred embodiment, the core 111 is made of polypropylene copolymers or polypropylene homopolymers, while the shell 112 is made of polyethylene copolymers, polyethylene homopolymers, polypropylene copolymers or polypropylene homopolymers. More specifically, the melting temperature of the polyethylene copolymer, polyethylene homopolymer, polypropylene copolymer, and polypropylene homopolymer for the shell 112 is lower than the melting temperature of the polypropylene copolymer and polypropylene homopolymer for the core 111. In other words, the polyethylene copolymer, polyethylene homopolymer, polypropylene copolymer and polypropylene homopolymer for the shell 112 are low-melting point polyethylene copolymer, low-melting point polyethylene homopolymer, low-melting point polypropylene copolymer and low-melting point polypropylene homopolymer respectively, while the polypropylene copolymer and polypropylene homopolymer for the core 111 are high-melting point polypropylene copolymer and high-melting point polypropylene homopolymer respectively. In a preferred embodiment, the melting temperature of the core 111 is between 160° C. and 180° C. and the melting temperature of the shell 112 is between 120° C. and 140° C.
As illustrated in
As illustrated in
As illustrated in
Multiple reinforcement fibers 10 were woven to obtain a reinforcement fabric 20. Multiple reinforcement fabrics 20 were laminated to obtain a raw fabric. Thereafter, the raw fabric was heated by infrared rays at a heating temperature of 155° C. for 3 minutes, in order to melt the shell 112 of the filament 11 of the reinforcement fiber 10 to obtain a melted raw fabric. Subsequently, the melted raw fabric was put into a mold at room temperature and pressed under a pressure of 6 MPa for 1 minute by a press machine, and then released from the mold to obtain the protection product 30.
In the present preparation example, the melting temperature of the shell 112 of the filament 11 in each reinforcement fiber 10 was 150° C., the melting temperature of the core 111 of the filament 11 in each reinforcement fiber 10 was 170° C., and the thickness of the protection product 30 was 1 mm.
The preparation of the protection product in the present preparation example was similar to the preparation of the protection product 30 in Preparation Example 1, except that the raw fabric was heated by a halogen lamp to obtain a melted raw fabric in the present preparation example.
Multiple reinforcement fibers 10 were woven to obtain a reinforcement fabric 20. Multiple reinforcement fabrics 20 are laminated to obtain a raw fabric. Thereafter, the raw fabric was placed in a mold at a heating temperature of 155° C. for 1 minute, in order to melt the shell 112 of the filament 11 of the reinforcement fiber 10 to obtain a melted raw fabric. Subsequently, the melted raw fabric was put into a mold at room temperature and pressed at a pressure of 6 MPa for 30 seconds to 40 seconds by a press machine, and then released from the mold to obtain the protection product 30.
In the present preparation example, the melting temperature of the shell 112 of the filament 11 in each reinforcement fiber 10 was 150° C., the melting temperature of the core 111 of the filament 11 in each reinforcement fiber 10 was 170° C., and the thickness of the protection product 30 was 0.6 mm.
As can been seen from above, the reinforcement fiber 10 is composed of multiple filaments 11 and the melting temperature of the shell 112 of each filament 11 is lower than the melting temperature of the core 111 of each filament 11, so the reinforcement fiber 10 can be directly heated to melt the shell 112 of each filament 11 while the core 111 of each filament 11 is not melted, and then molded to be the protection product 30, wherein the shell 112 of the filaments 11 in the reinforcement fiber 10 is melted and bonded to a base 31 solidified into the protection product 30, and the base 31 of the protection product 30 tightly coats the core 111 of the filaments 11 in the reinforcement fiber 10. Because the core 111 of each filament 11 is not melted during the process of manufacturing the protection product 30, the strength of the core 111 of each filament 11 is not weakened, so as to enhance the overall structural strength of the protection product 30.
Therefore, the reinforcement fabric 20 woven from the reinforcement fiber 10 can be manufactured into a protection product 30 with good impact resistance simply through heating and molding without a reinforcing film, thereby reducing the process complexity and cost of the protection product 30.
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
