KR20210117224A - Cut resistant glove and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a safety glove using a metal conjugate yarn and a manufacturing method thereof, in which a core yarn is formed of at least one metal thread of tungsten thread, stainless thread, and nitinol thread is prepared, any one or two or more polyester yarn, nylon yarn, or polyethylene yarn is selected and used as a first auxiliary yarn, and the first auxiliary yarn is divided into two strands and then twisted and covered in different directions by means of an outer periphery of the core yarn so as to form a primary covering yarn. A metal conjugate yarn is formed by secondarily covering an outer periphery of the primary covering yarn with a second auxiliary yarn including a high molecular weight and ultra-high molecular weight polyethylene yarn. A safety glove is knitted by using the metal conjugate yarn, and in a knitting process, the metal conjugate yarn is used as an auxiliary yarn so as to knit the glove using a double yarn knitting machine. Accordingly, the safety glove knitted with the metal conjugate exhibits excellent cutting resistance and wearability. A joining part of the core yarn can be easily bent and cut such that a user can freely move his or her hand while wearing the glove, and thus, excellent workability can be secured.

Description

Safety gloves using metal composite yarn and manufacturing method thereof {CUT RESISTANT GLOVE AND MANUFACTURING METHOD THEREOF}

The present invention relates to a safety glove using a metal composite yarn and a method for manufacturing the same, and more specifically, a metal yarn is used as the screening, and the screening is performed using a first auxiliary yarn selected from polyester yarn, nylon yarn, or polyethylene yarn. The primary covering yarn is covered by dividing the first auxiliary yarn into 2 strands and twisting in opposite directions to prepare a first covering yarn, and then the primary covering yarn with a second auxiliary yarn containing a high molecular weight/ultra-high molecular weight polyethylene (HMWPE, UHMWPE) yarn The metal composite yarn is manufactured by covering the The present invention relates to a safety glove using a metal composite yarn, and a method for manufacturing the same, so that the knitted safety glove can secure excellent wearability and workability while having excellent cut resistance.

In general, in industrial sites, various types of safety gloves are used to protect the hands of workers and to prevent slipping of products or tools. As safety gloves for preventing cuts with reinforced characteristics are used, the use of such safety gloves for cut protection is mandatory in Europe and other countries by law.

Specifically, safety gloves for preventing cuts are mainly used in workplaces that use cutting tools such as knives or saws, such as meat processing and seafood processing, or in workplaces that handle sharp metal materials and metal products, such as automobile factories, steel mills, and shipyards. It is usually knitted using aramid or high molecular weight/ultra high molecular weight polyethylene (HMWPE, UHMWPE) fibers.

However, the safety gloves using the above aramid and high molecular weight/ultra-high molecular weight polyethylene fibers have superior cutting strength compared to normal gloves, but most of them did not secure sufficient cutting strength with a cutting strength of 4 or less grades, but also meet European standards. It did not reach 'F' grade.

Accordingly, safety gloves using high denier thick aramid or high molecular weight/ultra-high molecular weight polyethylene fibers were manufactured to secure sufficient cutting resistance to prevent cuts. A problem occurred.

In addition, in the case of Dyneema yarn among ultra-high molecular weight polyethylene (UHMWPE) fibers, it is expensive and economically limited to use at work sites.

On the other hand, there are cases where wire or glass yarn is used instead of expensive dynemasa, but compared to the improved cutting resistance, it has no elasticity and it is not easy to bend and unfold, so it is not comfortable to wear and the workability is remarkably poor. Not only could it not be used as a delicate work glove such as handling, but if a wire or glass wire is short-circuited, the end of the wire or glass wire protrudes to the surface of the glove, impairing the fit and injuring the hand of the glove wearer. There were also problems.

Patent Publication 10-2016-0139479

In order to solve the above problems, the present invention uses a metal yarn as a core and covers the outer periphery of the core with a first auxiliary yarn selected from polyester, nylon, or polyethylene, and then, high molecular weight/ultra-high molecular weight An object of the present invention is to provide a safety glove and a method for manufacturing the same that have excellent cutting strength at a low price by secondary covering with a second auxiliary yarn containing polyethylene (HMWPE, UHMWPE) yarn and do not reduce the wearing comfort.

A safety glove using a metal composite yarn and a method for manufacturing the same according to the present invention for achieving the above object is an outer periphery made of at least one metal yarn of tungsten yarn/stainless yarn/nitinol yarn, polyester yarn or nylon yarn Alternatively, select any one of polyethylene yarns or select two or more and use them as the first auxiliary yarn, but divide the first auxiliary yarn into 2 strands and twist them in different directions around the core to form a primary covering yarn, and a high molecular weight / Second auxiliary yarn including ultra-high molecular weight polyethylene yarn is covered secondly on the outer periphery of the first covering yarn to form a metal composite yarn, and a safety glove is knitted using the metal composite yarn, but the metal composite yarn in the knitting process It is characterized in that the gloves are knitted with a double superior knitting machine by using it as an auxiliary superior.

And the present invention further includes an attachment forming process for forming an attachment (a highly brittle part) on the core made of metal thread by pressing the core at regular intervals, so that when a tensile force is applied over a certain level, such as bending a finger while using gloves, There is another feature in the configuration in which the installation is short-circuited to enable precise work in the worn state.

According to the present invention of the configuration as described above, the outside of the metal yarn is first covered with a first auxiliary yarn composed of polyester yarn, nylon yarn or polyethylene yarn, and then covered with a second auxiliary yarn containing a high molecular weight/ultra-high molecular weight polyethylene yarn. By constructing safety gloves using metal composite yarn, the price is low compared to safety gloves made of only expensive yarns such as Dyneema yarn in the related art, and it is of sufficient grade (eg, 'F' grade of European standards). It has the effect of satisfying the cutting strength.

In addition, when a certain amount of tensile force is applied to the metal composite yarn by forming an attachment in the examination, the safety gloves knitted with the metal composite yarn can be increased because the attachment is short-circuited, so that actions such as bending fingers or clenching a fist are free, as a result This has the effect of providing a safety glove with excellent workability that can be used even for sophisticated work.

In addition, even if the examination made of metal thread is short-circuited, the end is not exposed to the surface of the glove by the double-covered second auxiliary yarn, and the metal composite yarn is used as auxiliary excellent material so that it is located on the outer surface of the glove. Since the inner surface of the glove has a thread without a metal thread such as nylon thread, the hand is not injured, so that it is more comfortable to wear than a conventional safety glove.

1 is a view showing an examination and a first auxiliary yarn constituting the primary covering yarn of the present invention;
2 is a view showing the metal composite yarn of the present invention;
3 is a view showing an embodiment of the metal composite yarn that has been subjected to the mounting and forming process in the present invention;
4 to 5 are views showing the mounting and forming process of the present invention;
6 is a view showing the working state of the safety glove according to the present invention;

A preferred embodiment of the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 1 and 2, the safety glove using the metal composite yarn according to the present invention is a core 10 made of at least one metal yarn of tungsten yarn/stainless steel yarn/nitinol yarn, and a polyester yarn or nylon yarn. Alternatively, the primary covering yarn 30 is formed by dividing the first auxiliary yarns 22 and 24 composed of any one selected from among polyethylene yarns or a mixture thereof into two and twisting them around the outer periphery of the core 10 in different directions to cover them, , a metal composite yarn 50 is formed by covering the second auxiliary yarns 42 and 44 including a high molecular weight/ultra high molecular weight polyethylene yarn on the outer periphery of the first covering yarn 30, and the metal composite yarn 50 ) is used to knit safety gloves, but in the knitting process, the metal composite yarn 50 is used as an auxiliary superior to knit gloves with a double superior knitting machine.

In the above, the core 10 may be composed of at least one metal thread from among tungsten yarn/stainless yarn/nitinol yarn alone or in duplicate. As described above, safety gloves are finally produced by composing the screening with inexpensive metal yarns. production cost can be reduced.

At this time, the metal yarn used as the screening 10 should satisfy the low-cost and sufficient cut resistance. To satisfy this, the tungsten yarn has a diameter of 20 to 30 μm, the stainless yarn has a diameter of 20 to 60 μm, and the nitinol yarn has a diameter of 20. It is preferable to configure the core 10 with a metal thread having a thickness of ~90 μm.

And the first auxiliary yarn 20 covered on the outer circumferential surface of the examination 10 uses only one of 70-400 denier nylon yarn, polyester yarn, or polyethylene yarn, or a mixture of two or more, and the first auxiliary yarn is 2 Divide into strands, so that the core 10 is not exposed to the outside, the 2 strands of the first auxiliary yarn are tightly twisted in different directions (S and Z twist) under the conditions of 1000~1500T/M (Twist per Meter) to cover do.

On the other hand, the polyester yarn is inexpensive and can reduce the cost of safety gloves, and the fiber itself has no moisture content and low hygroscopicity, so it dries quickly because it hardly absorbs water. It is suitable for use as a first auxiliary agent that is primarily covered.

In addition, since the polyester yarn is strong in frictional strength and heat, it protects the user's hand safely when used in safety gloves and improves the durability of the safety gloves.

In addition, the second auxiliary yarn may be composed of only high molecular weight or ultra high molecular weight polyethylene yarn, and in addition to using nylon yarn, etc., the second auxiliary yarn is divided into 2 strands and covered with the second auxiliary yarn, but the second auxiliary yarn is the outside of the first auxiliary yarn and the twist direction Make sure that this is the opposite, and when using 2 strands of the second auxiliary yarn, make sure that the twist direction is also opposite between the second auxiliary yarns.

In the above, the second auxiliary yarn 42 composed of high molecular weight or ultra-high molecular weight polyethylene yarn uses 300-500 denier, and the second auxiliary yarn 44 composed of nylon yarn uses 50-100 denier, and in the embodiment of the present invention, the The second auxiliary yarn 44 made of nylon yarn is configured on the outermost side, and the second auxiliary yarn 42 made of high molecular weight or ultra-high molecular weight polyethylene yarn is configured inside it.

On the other hand, the nylon yarn has excellent elasticity, has a soft touch, contamination is easily removed and dries quickly, has excellent strength, elongation and toughness, and has high frictional strength, so that when applied to gloves, gripping objects etc. It makes the life of the product longer, and it has excellent elasticity and does not wrinkle.

In addition, the high molecular weight or ultra high molecular weight polyethylene yarn is a material that has both the rigidity of a metal material and the flexibility of a plastic, and is strong in impact and compression and has excellent restoring force, so it can be applied to products that are thin and light and can withstand external impact.

On the other hand, UHMWPE fiber (ultra high-molecular-weight polyethylene), which has a higher molecular weight than HMWPE, is a polyethylene fiber that greatly increases strength by highly orienting ultra-high molecular weight polyethylene. It has a density of 0.97 g/cm ³ compared to other fiber materials. Lightweight, does not absorb water, strength. Abrasion and elastic modulus are very high, so it is easy to work in post processes such as weaving or knitting, and it is chemically safe, has wide chemical resistance, and has excellent light resistance to ultraviolet rays, so physical properties do not deteriorate even when used underwater or outdoors.

In the above, 300-1500 T/M (TWIST PER METER) of the first auxiliary yarn of the two strands used for the first covering is applied, and 300-500 T/M is applied for the second covering.

In an embodiment of the present invention having such a configuration, using a tungsten yarn with a diameter of 20 μm as the core, and twisting two nylon yarns of 70de as the first auxiliary yarn at 400 t/m in the S/Z/ direction, respectively, for the primary covering After composing the yarn, it was confirmed that the tensile strength of the metal composite yarn produced by twisting 400 de high molecular weight polyethylene yarn with an S twist of 400 t/m on the outside was 13.53 gF/d, the density was 647.5 de, and the breaking load was 8760 g.

As another example, using tungsten yarn with a diameter of 20 μm as the core, and 2 strands of 70de nylon yarn as the first auxiliary yarn, twist at 1300 t/m in each S/Z/ direction to form a primary covering yarn, and then In the case of a metal composite yarn prepared by twisting 400de high molecular weight polyethylene yarn with S twist at 330t/m and twisting 70de nylon yarn at 330t/m in the Z direction on the outside, the tensile strength is 9.36 gF/d, and the density is 837de. , it was confirmed that the cutting load was 7834g.

On the other hand, the screening 10 is an attachment forming process, that is, it is compressed at regular intervals so that attachments 12 with weak strength are formed at predetermined intervals as shown in FIG. 3 .

For this, the examination 10 passes through a plurality of rollers 62 and 64 for compression as shown in FIG. The other roller 62 is flat or has a groove (not shown) in which the protrusion 66 is accommodated. Mounting 12 is formed with a reduced diameter of 30-60%.

In addition, the other roller 64 on which the protrusion 66 is formed is compressed while heat is transferred and the part of the core 10 in contact with the projection 66 is heated to form the mounting part 12 more easily, at this time the core 10 is heated. Since the heat is moved along the other side roller 62 to which no heat is transmitted, heat is not transmitted to the core 10 except for the portion in contact with the protrusion 66 , so that the attachment 12 is formed only in a part of the core 10 .

As another example, as shown in FIG. 5 , the examination 70 is formed narrowly at the lower end and passes through the press 72 that reciprocates up and down at regular intervals. A guide 76 having a guide groove 75 formed thereon is provided on the upper portion of the die 74 through which the examination 10 is passed in order to prevent this from happening.

When knitting with the metal composite yarn to which the core 10 configured as described above is applied, the core may be cut by bending the fingers, etc., as shown in FIG. Since it still exists, when applied to safety gloves, the cut resistance of the gloves is maintained while maximizing elasticity and flexibility.

On the other hand, in the safety glove knitting process using the metal composite yarn, the main superiority is a nylon yarn having a diameter of 40 to 150D, and a covering yarn such as a span yarn having a diameter of 40 to 150D is applied, and the auxiliary superiority is of the present invention By applying the metal composite yarn, the structure is designed so that the nylon span covering yarn on the inside of the knitted fabric and the metal composite yarn come on the outside, and it is knitted with a 13 gauge double superior knitting machine.

The safety glove of the present invention manufactured in this way has very good cutting resistance and is thin in diameter, has self-elasticity, and is soft to the touch. , in the metal composite yarn, the examination composed of the metal yarn is not directly exposed to the working environment, but is covered and protected by the primary and secondary covering yarns of the outer surface, and as a result, the primary and secondary covering yarns of the outer surface are worn or damaged. Safety and service life are greatly improved, such as preventing the loss of the original function of the knitted fabric even if it is lost.

On the other hand, the safety gloves manufactured as described above may be used by coating the silicone according to the intended use.

10: Examination 12: Installation
22, 24: 1st auxiliary yarn 30: 1st covering yarn
42, 44: second auxiliary element 50: metal composite yarn

Claims (5)

The outer periphery of the core 10 made of any one selected from tungsten yarn having a diameter of 20 to 30 μm, stainless yarn having a diameter of 20 to 60 μm, or nitinol yarn having a diameter of 20 to 90 μm, or a mixture thereof,
The primary covering yarn by dividing the first auxiliary yarns 22 and 24 composed of any one selected from polyester yarn, nylon yarn, or polyethylene yarn or a mixture thereof into two strands and twisting them around the outer periphery of the core 10 in different directions to cover them. form (30),
The metal composite yarn 50 is formed by second covering the second auxiliary yarns 42 and 44 including the high molecular weight/ultra-high molecular weight polyethylene yarn on the outer periphery of the first covering yarn 30,
Safety gloves using a metal composite yarn, characterized in that knitted using the metal composite yarn (50).
The safety glove using a metal composite yarn according to claim 1, wherein a double superior knitting machine is used when knitting the glove, and a metal composite yarn is used as an auxiliary superior yarn to form the outer surface of the knitted glove with the metal composite yarn. .
The method according to claim 1 or 2, wherein the second auxiliary yarn is composed of a high molecular weight or ultra high molecular weight polyethylene yarn and a nylon yarn, and a second auxiliary yarn 42 composed of a high molecular weight or ultra high molecular weight polyethylene yarn is formed on the outside of the primary covering yarn, A safety glove using a metal composite yarn, characterized in that the second auxiliary yarn 44 composed of , nylon yarn is formed on the outside, and the twist direction of each auxiliary yarn is reversed.
According to claim 1 or 2, when a tensile force acts on the metal composite yarn (50) by applying an external force to the core (10) to form a high brittle attachment (12) Safety gloves using metal composite yarn, characterized in that the gloves can be easily stretched as the short circuit occurs.
As the outer periphery of the core 10 made of any one selected from tungsten yarn having a diameter of 20 to 30 μm, stainless yarn having a diameter of 20 to 60 μm, or nitinol yarn having a diameter of 20 to 90 μm, or a mixture thereof, polyester yarn or nylon yarn Alternatively, the primary covering yarn 30 is formed by dividing the first auxiliary yarns 22 and 24 composed of any one selected from polyethylene yarns or a mixture thereof into two and twisting them around the core 10 in different directions to cover them, ,
The metal composite yarn 50 is formed by second covering the second auxiliary yarns 42 and 44 including the high molecular weight/ultra-high molecular weight polyethylene yarn on the outer periphery of the first covering yarn 30,
A method of manufacturing a safety glove using a metal composite yarn, characterized in that knitting the glove using the metal composite yarn (50).

Images