KR101378613B1 - Aramid composite and protector made therefrom - Google Patents

Abstract

The present invention includes a protection member made of aramid air-textured yarn to excellent cutting resistance and puncture resistance and to include a shock absorbing member formed on the inside of the protective member to provide excellent impact resistance The present invention relates to an aramid composite and a guard prepared therefrom which can be used in a product which protects the human body from sharp substances. The aramid composite of the present invention, the protective member comprising aramid air-textured yarn (air-textured yarn); An impact absorbing member adhered to one surface of the protective member; And an adhesive member for adhering the protective member and the shock absorbing member.

Description

Aramid composite and protector made therefrom}

FIELD OF THE INVENTION The present invention relates to aramid composites and guards made therefrom, and more particularly to aramid composites comprising aramid fibers and guards made therefrom.

The human body is damaged from various external objects during dangerous work or sports. For example, sharp weapons such as knives, awls, etc. can cause great damage to the human body, fall from the fall of a motorcycle, injuries to the body, and even injury from bullets fired from guns. Can be. In particular, when a rotary blade is broken or hit a stone during felling and weeding work, the situation is frequently injured by the broken blade and stone.

In order to prevent damage to the human body that occurs during such dangerous work or sports activities, conventionally used protective equipment made from reinforced plastics.

However, the guards made of conventional reinforced plastics can cause large damage to the human body due to impact when the shock absorbing performance is reduced when they are impacted by sharp objects, and secondary damage to the human body due to broken debris. There is a problem with wearing. In addition, the protector made of a conventional reinforced plastic has a problem of lowering the activity due to the weight.

In order to solve this problem, a guard using aramid filament has been proposed. Generally, wholly aromatic polyamide filaments, collectively referred to as aramid filaments, include para-aramid filaments and meta-aramid filaments that do not have a structure in which the benzene rings are connected linearly through an amide group (-CONH). Para-aramid filaments have excellent properties such as high strength, high elasticity, low shrinkage, etc., and are used for various purposes because they have a strong strength enough to lift a 2 ton car with a thin thread of about 5 mm thick.

However, the guard produced from the aramid filament is good in cut resistance, but there is a problem that the puncture resistance is poor. That is, when used as a protector such as knees or elbows, there is a problem that the human body is greatly damaged by not properly defending an object such as a sharp awl, a knife, or glass.

Accordingly, there is a need for the development of a composite for guards that is not only light and sufficiently absorbs external impacts, but also does not cut and penetrate from sharp objects.

The present invention is derived to solve the above problems, by including a protective member made of aramid air-textured yarn (excellent cut resistance and puncture resistance and impact formed inside the protective member) It is an object of the present invention to provide an aramid composite and a guard prepared therefrom which can be used in a product which protects the human body from a blade or a sharp material by including an absorbent member and thus excellent impact resistance.

In order to achieve the above advantages, and in accordance with the object of the present invention, an aspect of the present invention, a protective member including an aramid air-textured yarn; An impact absorbing member adhered to one surface of the protective member; And it provides an aramid composite comprising an adhesive member for bonding the protective member and the shock absorbing member.

Another aspect of the invention, the aramid composite; And it provides a guard comprising a binding member.

The present invention has the following effects.

First, the aramid composite according to the present invention includes a protection member made of aramid air entangled yarn, excellent in cut resistance and puncture resistance, and has a good touch and appearance as there are a plurality of loops on the surface.

Second, the aramid composite according to the present invention has an effect that the shock absorbing ability is greatly improved by including a shock absorbing member made of a sponge.

Third, the protector according to the present invention includes an aramid composite and the binding member to protect the human body from the outside safely and easily removable.

1 is a cross-sectional view of an aramid composite according to an embodiment of the present invention.
Figure 2 is a schematic diagram of a guard including a Velcro as a binding member according to an embodiment of the present invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Therefore, the present invention encompasses all changes and modifications that come within the scope of the invention as defined in the appended claims and equivalents thereof.

As used herein, the term 'air entangled yarn' refers to a processed yarn in which each of the short fibers constituting the fibers is entangled with each other and a loop is formed on the surface.

As used herein, the term 'super filament' refers to a plurality of fibers formed on the outside of the air entangled yarn.

As used herein, the term 'screening' refers to a plurality of fibers formed inside the air entangled yarn.

Hereinafter, with reference to the accompanying drawings will be described in detail a specific embodiment of the aramid composite material 100 and the guard according to the present invention.

First, the aramid composite material 100 according to the present invention will be described.

1 is a cross-sectional view of an aramid composite 100 according to an embodiment of the present invention. As shown in FIG. 1, the aramid composite material 100 of the present invention includes a protective member 10, an impact absorbing member 30 bonded to one side of the protective member 10, and an adhesive member 20 for adhering them. It is made to include.

The protective member 10 is an aramid air interlaced yarn (air textured) manufactured by tangling the mono-filaments (mono-filaments) constituting the aramid filament using a high pressure air injected from an air nozzle (air nozzle) yarn).

As defined above, the aramid air entangled yarn of the present invention has a plurality of aramid monofilaments entangled with each other and loops are drawn on the surface. Such air entangled yarns can be manufactured using only a core yarn, and can also be produced using both a core yarn and an effect yarn. When the air entangled yarn is manufactured using only the core yarn, the aramid monofilaments constituting the yarn are entangled with each other by colliding air with a strong pressure against the yarn, so that a loop is formed on the surface. When the air entangled yarn is manufactured using both the screening and the super yarn, the central portion of the air entangled yarn is located a plurality of the screen, and serves as a support. On the other hand, the outer portion of the air entangled yarn is located in a plurality of yarns, and provides a similar appearance and feel to the yarn.

The aramid air entangled yarn may be formed in a number of 10 to 350 pieces / meter loop having a length of 1.0 mm or more. If the number of loops is less than 10, it is impossible to obtain a yarn-like appearance. On the other hand, if the number of loops exceeds 350, the appearance becomes poor due to excessive loops and the tensile strength is so low that it is difficult to use in protective clothing. Do.

The aramid air interlocking yarn may have a fineness of 300 to 3,000 denier. If the fineness of the aramid air entangled yarn is less than 300 denier, it is difficult to obtain aramid air entangled yarn with sufficient loops and economic efficiency may be lowered because a thick fabric cannot be obtained, while the fineness of the aramid air entangled yarn is 3,000 deiers. If exceeded, process control may not be easy, and thus processability may be degraded and fabrication of the fabric may be difficult.

The protective member 10 may be formed in a multilayer. That is, the protective member 10 may be manufactured by laminating an appropriate level of fabric according to the use or according to the required physical properties of the customer.

As such, by using the protective member 10 made of a multilayer, cutting resistance and puncture resistance can be greatly improved.

The fabric may be in various forms. That is, it may be a unidirectional sheet, a woven fabric, a knitted fabric, or a nonwoven fabric. In particular, in consideration of productivity, processability, physical properties, and the like, it may be preferable to use a fabric made of aramid air entangled yarn.

The fabric may have a cut resistance of at least 5.0 N, measured according to ISO 13997: 1999. If the cut resistance of the fabric is less than 5.0 N, since it is easily cut from an external object such as a knife, it may not protect the human body safely.

In addition, the fabric may have a puncture resistance of 53 N or more, measured according to KS K ISO 13996: 2008. If the piercing resistance of the fabric is less than 53 N, it may not be sufficiently stable to protect the human body because it is easily pierced from an external object such as an awl.

The shock absorbing member 30 may use a variety of products. For example, polyethylene sponge is not only inexpensive, but also has an excellent impact absorption performance. In addition, since the silicone sponge has excellent heat resistance, the shock absorbing ability does not deteriorate even at a high temperature, and excellent flexibility is excellent in workability, and excellent elasticity has the advantage of smoothly absorbing external impact.

The aramid composite material 100 adheres the protective member 10 and the shock absorbing member 30 by an adhesive member 20. In addition, the adhesive member 20 may also serve to bond the sheets forming the multilayer when the protective member 10 forms a multilayer.

The adhesive member 20 may use a variety of products. For example, adhesion may be achieved by stitching the yarn, or the surface may be melted and adhered by applying heat and pressure. Alternatively, the adhesive may be applied and adhered by pressure, or the film may be inserted and adhered under pressure. As the adhesive and the film, ordinary acrylic resins can be used. Through the adhesive member 20, the aramid composite 100 is improved in form stability, and the cut resistance and the puncture resistance is increased.

The aramid composite material 100 prepared as described above may have a shock absorbency of 35 kN or less at a shock of 50 J as a result of a shock absorption test according to EN 1621-1. The shock absorbency of 35 kN or less means that the force transmitted to the back of the sample is 35 kN or less when subjected to a shock of 50 J from the outside. The aramid composite material 100 having such excellent shock absorption has the advantage of minimizing bruises by protecting the human body from external shocks safely.

Next, the guard according to the present invention will be described.

Aramid composite 100 as described above may be used in the manufacture of a variety of guards. For example, it can be used for leg guards, knee guards, arm guards, chest guards, helmets and the like. That is, the aramid composite material 100 may be used in the manufacture of all the guards that require cut resistance and impact resistance.

Such a guard comprises the aramid composite 100 and the binding member 40 described above. The binding member 40 may be implemented by various methods. That is, the binding member 40 may be implemented by a ring, an elastic band, a button, or a zipper. In particular, the binding member 40 can be implemented using a velcro (velcro), the Velcro has the advantage that it is easy to detach.

2 is a schematic view of a guard including Velcro, which is the binding member 40, according to an embodiment of the present invention. As shown in FIG. 2, the guard is provided with a claw derivation unit 42 and a claw derivation unit 42 having a plurality of claws at one end of the aramid composite material 100 so as to be detached from the claw derivation unit 42. Aramid composite material 100 on the opposite side of the) may include a binding member 40 provided with a hook engaging portion 41. Such guards can be used as leg guards, which can protect the legs from external objects such as blades or bullets during logging, bees, and combat operations.

Hereinafter, the present invention will be described in detail with reference to examples and comparative examples. It should be noted, however, that the following examples are intended to assist the understanding of the present invention, and the scope of the present invention should not be limited thereby.

Example  One

An aramid filament having a fineness of 300 denier having a tensile strength of 23 g / d is used as the superfine yarn, and the superfine yarn is supplied at an overfeed rate of 30% by adjusting the speed of the feed roller and the extraction roller. At the same time, the same aramid filament as the super yarn is used as the screening, and water is supplied to the screening using a water supply nozzle while supplying the screening at an oversupply rate of 15% by adjusting the speeds of the feeding roller and the drawing roller. Thereafter, the superfiber and the screening were fed to an air entanglement nozzle and entangled with each other at an air pressure of 15 kgf / cm 2, followed by heat treatment at a temperature of 160 ° C. using a heat tube, and then wound on a branch pipe. Through the process, 730 denier aramid air interlock yarn was prepared.

Thereafter, the aramid air entangled yarn was applied to warp and weft yarns and woven into plain weave having a warp density of 10 bones / cm and a weft density of 10 bones / cm to prepare aramid fabrics.

Thereafter, the prepared aramid fabric was laminated in five sheets, and the aramid fabrics were adhered to each other with a polyvinylacetate adhesive (Loctite 495) to prepare a protective member 10.

Thereafter, the shock absorbing member 30 was adhered to one surface of the manufactured protective member 10 by using the adhesive to prepare an aramid composite 100. At this time, the shock absorbing member 30 used a commercially available polyethylene sponge (Shinil Sports) having a thickness of 5 mm.

Comparative Example  One

In Example 1 described above, the aramid composite material 100 by the same method as in Example 1 except for manufacturing a fabric using an aramid yarn (Kolon Industries), a combination of 60 water instead of the aramid air entangled yarn Prepared.

Comparative Example  2

In Example 1 described above, the aramid composite material by the same method as in Example 1, except that the fabric is manufactured using aramid filaments (Heracron, Kolon Industries) having a fineness of 600 denier instead of the aramid air interlocking yarn (100) was prepared.

Comparative Example  3

In Example 1 described above, the aramid composite material 100 was prepared in the same manner as in Example 1 except for using an aramid nonwoven fabric (Kolon Industries) instead of the aramid fabric.

Physical properties of the aramid composite material 100 prepared by Examples and Comparative Examples were measured by the following method and the results are shown in Table 1.

Of aramid composite (100) Cutting resistance (N) measurement

It was measured according to ISO 13997: 1999. Specifically, the load g when the moving distance of the blade is 20 mm is referred to as cut protection performance (CPP), and the cut protection performance is defined as the average density (g / m 2) of the sample. Dividing resistance (N) was measured.

Measurement of Penetration Resistance (N) of Aramid Composite (100)

It was measured according to KS K ISO 13996: 2008.

Impact Absorption of Aramid Composite (100) kN ) Measure

Measurement was made according to the standard EN 1621-1. Specifically, the impact absorption (kN) of the composite was measured by sensing the force transmitted to the back of the sample after applying a shock of 50 J to the sample.

division Cut resistance (N) Penetration Resistance (N) Shock Absorption (kN) Example 1 5.1 57.5 33.9 Comparative Example 1 4.7 52.1 34.3 Comparative Example 2 4.8 0 35.4 Comparative Example 3 11.8 0 34.1

10: protective member 20: adhesive member
30: shock absorbing member 40: binding member
100: Aramid Composite

Claims (9)

Protective members including aramid air-textured yarns;
An impact absorbing member adhered to one surface of the protective member; And
Including an adhesive member for bonding the protective member and the shock absorbing member,
The protective member is made of a multilayer,
The multilayer is aramid composite, characterized in that the predetermined fabric is made of a stack. The method of claim 1,
The aramid air entangled yarn aramid composite, characterized in that 300 to 3,000 denier. delete delete The method of claim 1,
The fabric is an aramid composite, characterized in that the cut resistance measured in accordance with the ISO 13997: 1999 regulation of 5.0 N or more, and the puncture resistance measured in accordance with KS K ISO 13996: 2008 regulation of 53 N or more. The method of claim 1,
The aramid composite is an aramid composite, characterized in that it has a shock absorption of 35 kN or less at a shock of 50J, as a result of shock absorption test according to EN 1621-1. The method of claim 1,
The shock absorbing member is an aramid composite material comprising a polyethylene sponge. An aramid composite according to any one of claims 1, 2, and 5-7; And
A guard comprising a binding member. 9. The method of claim 8,
The binding member is a Velcro (velcro).

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