JPH08134782A - Protective material and method for producing the same - Google Patents

Abstract

PURPOSE: To obtain a protective material capable of improving cut resistance or excellent in softness and fashionabilities while keeping the effects of cut resistance. CONSTITUTION: This protective material comprises flocking at least one kind of an organic fiber selected from the fibers of high strength and high modulus having >=20g/de cut resistance and >=5000Kg/mm<2> Young's modulus as pile yarns on the surface thereof. The characteristic of the production of this protective material is to static flock at least one or more organic fibers selected from the fibers of high strength and high modulus having >=20g/de cut resistance and >=5000Kg/mm<2> Young's modulus as pile yarns to form a piled product and then dye the flocked part of the product.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to clothes, gloves, arm covers, leg halves, shoes, hats, etc. that protect the body without breaking or piercing even if it comes into contact with blades or sharp metal. The present invention relates to a protective material used in whole or in part, a material used for the purpose of preventing slipping, a safety fence or a safety rope to be installed at a construction site, an electric flocked molded product used for a construction net, and a manufacturing method thereof.

[0002]

2. Description of the Related Art When handling cutlery, metal, etc. by hand, or when cutting or pruning in the forest, contact the sharp edge of the cutlery, metal, wood or stone, and cut a part of the body such as hand or arm. In order to protect the body from this, work clothes and gloves made of knitted fabric made of fibers having a high Young's modulus are used. Fibers with a high Young's modulus have a high resistance to cuts due to knives, etc. and are excellent in abrasion resistance, so they are very effective in protecting the body, but the fibers themselves are stiff and the feel to the hands and arms is poor. In addition, there are drawbacks such as large bulkiness and poor hygroscopicity compared to natural fibers such as cotton. There are also gloves and the like in which conventional fibers or fibers having a high Young's modulus and metal fibers such as stainless steel are interwoven with each other in order to improve cut resistance, but this has the drawback that the cut metal fibers are stuck during use. there were.
Furthermore, fibers having a high Young's modulus that are excellent in cut resistance are more expensive than conventional fibers, and there is a drawback in that post-processing such as knitting, spinning, and sewing is difficult.

[0003]

SUMMARY OF THE INVENTION In view of the drawbacks of the conventional protective materials, the present invention improves the cut resistance or maintains the effect of cut resistance while being flexible and having excellent fashionability. It is intended to provide materials for use.

[0004]

In order to achieve the above object, the present invention has the following constitution.

That is, in the protective material of the present invention, at least one organic fiber selected from high-strength and high-elasticity fibers having a tensile strength of 20 g / d or more and a Young's modulus of 5000 kg / mm ² or more is used as a pile yarn on the surface. It has a tensile strength of 20 g /
d or more, at least one or more kinds of organic fibers selected from high-strength and high-elasticity fibers having Young's modulus of 5000 kg / mm ² or more are electrically flocked on the surface as a pile yarn to form a flocked product. It is characterized by dyeing the flocked portion.

[0006]

The present invention was completed by discovering that various molded articles having high strength and high elasticity fibers flocked on the surface thereof, for example, flocked cloth, have surprisingly improved cut resistance and abrasion resistance. Is. That is, when a high-strength, high-elasticity fiber pile such as aramid fiber is electro-flocked on a cloth, the cut resistance of the cloth is increased by about 1.5 times and the abrasion resistance is 1
It is a study of the fact that it can be improved more than 0 times.

In the present invention, the item to be transplanted includes, for example, sheet-like products such as woven fabrics, knitted fabrics and non-woven fabrics, as well as natural or artificial leather, flat bodies such as films and natural fabrics, artificial rubber, plastic plates, etc. And various three-dimensional molded articles such as nets, ropes, shoes, hats and blocks.

The pile yarn to be electroflocked has higher strength and higher Young's modulus, and thus has higher cut resistance and abrasion resistance, and is made of aramid fibers such as Kevlar manufactured by DuPont and Technora manufactured by Teijin, and Vectran manufactured by Kuraray. Polyarylate fiber is preferable, and polyvinyl alcohol fiber and polyethylene fiber have tensile strength of 20 g / d and Young's modulus of 5
000 Kg / mm ² or higher is preferable, and Kevlar 49, which is a highly elastic yarn, has a tensile strength of 22 g / d and a Young's modulus of 130.
Most preferred is 00 kg / mm ² . The tensile strength and Young's modulus of the fiber used as the pile yarn are in accordance with JIS-L1013. The higher the single yarn fineness of the pile yarn is, the better the cut resistance and abrasion resistance are. However, if it is too large, the pile yarn becomes stiff, and if it is directly touched by the hands or the skin, the feeling is unpleasant and it hurts. Most preferred is 1 to 6 denier.
Further, it is preferable that the pile yarn for electric flocking is flocked substantially perpendicularly to the base material for flocking. The term "substantially vertical" may mean that some of the pile yarns are not vertical, but more than half of the pile yarns are napped almost vertically to the substrate. This is because when the pile yarns are not substantially vertical but substantially parallel, cut resistance and abrasion resistance tend to be low. When the pile threads are almost parallel, the cut resistance and abrasion resistance are low. When pile threads come into contact with blades, stones, etc., the cut and abrasion forces act from the side of the fiber, so the cross section of the pile threads It is estimated to be weaker than the direction. From this point of view, it is preferable that the pile length of the pile yarn is also short. This is because when the pile length becomes long, when the pile comes into contact with a blade or a stone, the pile falls and a force such as a cut or abrasion acts from the side surface of the pile. However, the pile length is related to the diameter of a single yarn, and since a large diameter has a high bending rigidity, it is less likely to fall than a small diameter even when it comes into contact with a blade or a stone.
As a result of an experiment in which the diameter and pile length of the pile yarn to be flocked were changed, the aspect ratio L / D obtained by dividing the pile length L (mm) by the pile single yarn diameter D (mm) was 20 or more and 300 or less. It was found that it is the most preferable in terms of cuttability and wear resistance.
Pile yarn is made by aligning the fibers to be flocked and cutting it to a certain length with a cutter, but usually fibers with a higher Young's modulus are harder to cut, and it is particularly difficult to cut the pile length to a length of 0.3 mm or less. And powdery things are mixed together.
When the pile length is longer, the fibers are easy to cut in the process of making the pile yarn and the pile length is easily aligned.However, if the pile length is long, it is necessary to increase the single yarn fineness of the fiber used for the pile yarn due to the aspect ratio. As the yarn fineness increases, the yarn becomes stiff and has a poor hand feel. Therefore, it is preferably 5 mm or less, and most preferably 0.5 to 2.0 mm. These pile yarns may be used in one kind, but in a field where acid resistance and alkali resistance are required especially in chemical resistance, for example, two or more kinds such as mixing aramid fiber and polyarylate fiber are used. Pile yarns consisting of high-strength and high-elasticity yarns may be mixed and used, and synthetic fibers such as nylon, polyester and acrylic having a Young's modulus of 5000 kg / mm ² or less, recycled fibers such as rayon, cotton and hemp. You may mix the pile thread which consists of natural fibers, such as. In particular, when cotton, nylon, vinylon, or hygroscopic acrylic is mixed as a pile thread with a pile thread made of high-strength and high-elasticity, the pile itself has hygroscopicity, so it can also be used on the part that comes into direct contact with the skin. It is possible and preferable.

The flocking density of pile yarn is 50,000 / cm ²
When the density is less than 50,000 lines / cm ² , a large effect on cut resistance and abrasion resistance cannot be seen. The reason is considered to be that the gap between the flocked piles is so large that the blades may come into direct contact with the base material, or the pile yarns may easily fall even when they contact the blades, stones, or the like. A higher flocking density is desirable, but 100,000 fibers / cm ² or less is preferable for applications requiring flexibility such as clothing and gloves. When the flocking density exceeds 200,000 / cm ² , the flocking density per unit tends to be too high, so that the rigidity of the base fabric after processing tends to be noticeable, but there is no problem if the rigidity is not taken into consideration.

The dyeing referred to in the present invention includes dyeing of fibers by various methods, for example, coloring with pigments such as primary coating and paint, and coloring with dyes. Young's modulus of 5000 kg / mm ² or more is used. Fibers having a high strength and a high elastic modulus are difficult to be colored by an ordinary dyeing method, and even if they are colored, the dyeing fastness such as light resistance and abrasion resistance is extremely poor. Therefore, by mixing the high-strength, high-elasticity fiber pile yarn with a colored pile yarn having a Young's modulus of 5000 kg / mm ² or less, such as ordinary colored nylon, colored polyester, colored acrylic, etc. A pattern can be drawn, and such a method can provide a colored product having excellent dyeing fastness. As a method of coloring the pile yarn, a dyed yarn or a pigment may be mixed with a polymer before spinning and spun into a spun yarn, or a pre-dyed pile yarn may be used. Of course, it may be colored with a pigment paint after flocking. Further, a pile yarn having a high strength and a high elastic modulus and a pile yarn made of a fiber having a Young's modulus of 5000 kg / mm ² or less may be electrically flocked and then colored by a usual dyeing method using a dye such as cloth. The cloth-like material dyeing machine may be freely selected according to the shape of the cloth or the base material, such as circular, over-meier, or zicker type. Pile yarn with high strength and high elastic modulus and Young's modulus of 5000
Kg / mm ² or less of mixing ratio of pile yarns of fiber varies depending required properties, high strength, Young's modulus to offset the drawbacks of color fastness of the fiber of high modulus is 5000 kg / mm ²
It is desirable that the pile yarn composed of the following fibers is 30% or more, and it is better that the mixing ratio is 50% or more.

The method of implanting pile yarn is to apply a sizing material such as a resin or an adhesive to the surface of the base material in advance, and then electrically or negatively charge the pile thread to be adhered to the base material. Ordinary up and down methods for flocking pile yarns, a combination of up and down methods, and other methods may be used, and resins and adhesives that are commonly used such as acrylic, urethane, and epoxy may be used. In the case of flocking cloth or leather, it is preferable to use a soft resin because the base cloth after flocking becomes soft. If necessary, the flocking may be performed on one side or both sides, and it is also possible to use different pile yarn materials and different colors for flocking the front surface and the back surface of the base material.

The protective material of the present invention may be put into practical use as a molded product, but it may be further processed, for example, cut, cut, crushed or otherwise processed into a band shape or a tape shape, and then put into practical use. , It may be convenient to use.

[0013]

EXAMPLES The present invention will be described in more detail with reference to examples.

Example 1 A plain weave base material made of 420 denier nylon, 630 filament yarn and having a length x width density of 54 x 54 threads / inch was coated with a sizing material made of acrylic resin at 80 g / m ² , and Tensile strength 23 g / d, Young's modulus 6300 Kg / mm
^2. Pile yarn consisting of Kevlar yarn with single yarn fineness of 1.5 denier, fiber length of 0.5 mm and aspect ratio of about 1100
Electric flocking was performed at a density of 00 fibers / cm ^{2 by} a usual up method on one surface of the base material substantially perpendicularly. The flocking density is calculated by subtracting the weight of the base material and the weight of the sizing material from the weight of the base cloth and calculating from the weight of the remaining pile yarn. The characteristics of the base cloth are shown in Table 1.

Example 2 The same base material as in Example 1 was processed with the same amount of the same sizing material as in Example 1, and the same Kevlar yarn as in Example 1 and a tensile strength of 6.0 g /
d, Young's modulus of 450 kg / mm ² , single yarn fineness of 2.1 denier, fiber length of 0.5 mm, and a pile ratio of orange-dyed nylon yarn with an aspect ratio of 31 and the weight ratio of Kevlar pile yarn to 50:50. The mixture was mixed as described above, and electric flocking was performed at a density of about 110000 fibers / cm ^{2 by} a normal up method so as to be substantially perpendicular to one surface of the substrate. The characteristics of this base fabric are shown in Table 1.

Example 3, Comparative Example 1 The same amount of the same sizing material as in Example 1 was applied to the same base material as in Example 1, the same Kevlar yarn as in Example 1 and tensile strength of 6.3 g /
d, Young's modulus of 450 kg / mm ² , single yarn fineness of 2.1 denier, fiber length of 0.5 mm, and aspect ratio of 31 nylon yarns are mixed so that the weight ratio with Kevlar pile yarns is 50:50. Then, electric flocking was carried out at a density of about 110000 pieces / cm ^{2 in} a direction substantially perpendicular to one surface of the substrate by a usual up method. Thereafter, 1.0% of the Irgalan-Orange-RL dye manufactured by CIBA-GEIGY was sampled from the base cloth and 1.0% of ammonium sulfate was collected from the base cloth to obtain a bath ratio. Dyeing at 1:20 using a circular dyeing machine at 95 ° C for 45 minutes, washing with water and drying, 140 ° C x 1 with a pin tenter.
Fixed length set for minutes. The characteristics of this base fabric are shown in Table 1.

As a comparative example, 80 g of a sizing agent made of the same acrylic resin as in Example 1 was applied to the nylon plain weave substrate of Example 1.
/ Cm ² applied, but without flocking, the characteristics are shown in Comparative Example 1 of Table 1, and the nylon plain weave substrate of Example 1 has a tensile strength of 6.3 g / d, a Young's modulus of 450 kg / mm ² , and a single yarn fineness. Table 1 shows the characteristics of a pile yarn composed of nylon yarn having 2.1 denier, a fiber length of 0.5 mm, and an aspect ratio of 31 alone.

Example 4 A nylon yarn 210 denier 24 filament raw yarn was used, and the same sizing material as in Example 1 was processed by using Russell netting, which was knitted into a mesh of 40 mm with a Russell knitting machine, as a base material. ,
The same Kevlar yarn as in Example 1 was electro-flocked at a density of 100,000 yarns / cm ² on almost the entire surface of the substrate by a combination of the usual up method and down method. The flocked density is calculated by calculating the surface area from the diameter of the net yarn assuming that there is no surface irregularity of the net yarn. The characteristics of this net are shown in Table 2.
The same sizing agent treatment as in Example 4 was applied to the same net material, but the characteristics of the non-flocked ones are shown in Table 2.

In the table, the cut resistance is determined by using a tensile tester manufactured by Shimadzu Corporation, sandwiching the sample in an iron sample holder having a slit width of 5 mm, and tightening the sample with a thumbscrew to detect a stress in a tensile test. Attach two single-edged razors of Feather Co., Ltd. to the tip of the jig attached to the load cell so that the angle of the razor tip is 60 degrees, and press the sample with the razor at a speed of 50 cm / min to cut. The resistance value at that time is read. The higher the value in the table, the higher the resistance and the more difficult it is to cut.

As for abrasion resistance, according to JIS-L1096 according to JIS-L1096, a custom-made abrasion tester manufactured by Daiei Kagaku Seiki Co., Ltd., a load of 1 pound was used and abrasion was caused until a hole was opened in the base cloth using emery paper cc400. It is shown by the number of wears.

The flexibility is tested by the 45 ° cantilever method of JIS-L1096, and the smaller the value is, the more flexible it is. The light fastness is based on JIS-L 0842, and is obtained by taking out a sample irradiated with a fade meter and comparing the degree of discoloration with non-irradiation with a gray scale.The larger the judgment grade, the longer the irradiation time and the discoloration. It is difficult to do.

In Table 2, the basis weights of the nets of Example 4 and Comparative Example 3 show the weight per 1 m ^{2 when} the nets are spread at right angles.

As for abrasion resistance, emery paper cc400 was wound around a metal roll having a diameter of 5 cm, and two mesh legs of the nets of Example 4 and Comparative Example 3 were sampled. Suspended so that they touch at an angle of
It shows the number of times until the net leg portion is cut by rotating the emery paper wound around the metal roll at a speed of 120 times / min with the initial load of 400 g applied.

[0024]

[Table 1]

[Table 2] As can be seen from Table 1, the weight of Example 1 is higher than that of Comparative Example 1.
It can be seen that although the thickness is large, it has high cut resistance and wear resistance, and is difficult to cut and tear. Example 2
Is a nylon yarn in which the pile yarn B is dyed in orange in advance, and the mixing ratio with the Kevlar pile yarn is 50:50, so that the cut resistance and abrasion resistance are lower than those in Example 1, but the non-flocked comparative example is used. 1 and the comparative example 2 in which flocking with the conventional pile yarn of only nylon yarn is superior, and the light fastness is superior to that of the example 1 having 100% Kevlar pile yarn, and it is understood that discoloration is less likely to occur. In Example 3, the whole base fabric is post-dyed after dyeing and the nylon of the pile yarn B is dyed, and the Kevlar of the pile yarn A is not dyed with the dye for nylon. This base cloth also exhibits almost the same characteristics as in Example 2, is superior in cut resistance and abrasion resistance to Comparative Examples 1 and 2, and is superior in light fastness to Example 1. Further, Example 4 also has much higher cut resistance and abrasion resistance than the net material of Comparative Example 3 in which hair is not transplanted, and is excellent as a safety net or flameproof mesh sheet to be spread on a construction site or the like. I understand.

[0025]

Industrial Applicability According to the present invention, a fashionable protective material which is excellent in abrasion resistance and cut resistance, has little discoloration with light, and is colored in a desired color depending on the application can be obtained. Furthermore, a pattern or a pattern can be attached to the base material by collectively using the partially colored pile yarns. Further, even when the piled yarn that has been electro-flocked is used in a portion where it directly comes into contact with the skin, the use of a highly hygroscopic material for the pile yarn B provides a comfortable protective material. Further, by attaching the base fabric of the present invention only to a necessary portion of a bag or clothes, for example, slip resistance and durability can be improved and cost can be reduced. Also, since Kevlar does not burn, it is also an excellent protective material when working at high temperatures.

Claims (9)

[Claims] 1. A tensile strength of 20 g / d or more and a Young's modulus of 50.
A protective material characterized in that at least one kind of organic fiber selected from high-strength and high-elasticity fibers having a weight of 00 kg / mm ² or more is flocked on the surface as pile yarn. 2. The protective material according to claim 1, wherein the high-strength and high-elasticity fiber is at least one fiber selected from aramid fiber, polyarylate fiber, polyvinyl alcohol fiber, and polyethylene fiber. 3. The protective material according to claim 1, wherein the pile yarn has a single yarn diameter D (mm) and a pile length L (mm) that satisfy the following equation. Aspect ratio: 20 <L / D <300 Pile length (mm): 0.3 <L <5 4. The protective material according to claim 1, wherein the pile yarn has a density of 50,000 yarns / cm ² or more and is flocked substantially perpendicularly to the surface of the molded product. 5. A pile yarn having a Young's modulus of 5000 kg / mm ²
The protective material according to claim 1, which is a mixture of one or more kinds of organic fibers that can be dyed by a conventional dyeing method of less than 1. 6. The protective material according to claim 5, wherein at least one kind of pile yarn is colored by dyeing or dyeing. 7. The protective material according to claim 1, wherein the item to be transplanted is a sheet or plate. 8. The protective material according to claim 1, which is cut into a tape shape or a belt shape. 9. A tensile strength of 20 g / d or more and a Young's modulus of 50.
Electro-flocking at least one organic fiber selected from high-strength and high-elasticity fibers having a strength of 00 kg / mm ² or more as a pile thread to form a flocked product on the surface, and then dyeing a flocked part of the flocked product. A method for manufacturing a protective material, characterized by: