JP7630219B2 - Woven fabric - Google Patents

Description

The present invention relates to a woven fabric made by interweaving fluid jet processed yarn and spun yarn.

Woven fabrics (gloves, arm covers, aprons, etc.) made from high-strength organic fibers such as fully aromatic polyamide fibers (aramid fibers) and fully aromatic polyester fibers are resistant to cutting by blades, and therefore have a remarkably high cut resistance compared to conventional gloves, arm covers, aprons, etc. made from cotton, etc. For this reason, they have been used as protective clothing to protect workers' hands and bodies from cuts in manufacturing sites that handle burred sheet metal products and fragile glass products, as well as in garbage collection sites that handle general garbage that may contain metal or glass fragments.

However, workers and the like are strongly demanding even safer and higher quality protective clothing. For example, when wearing protective gloves, workers generally work while wearing only one pair of gloves. Depending on the type of work, more cut resistance may be required, and gloves may need to be changed due to dirt, etc., so workers often wear gloves of the same type, sewn leather gloves, or rubber gloves, etc., over work gloves. For this reason, there is a demand for gloves that are lightweight, easy to put on (easy to put on in layers), and comfortable to wear (easy to work in).

Generally, knitted and woven fabrics made with spun yarns of high-strength fibers have excellent cut resistance, but because the fibers are highly rigid, they feel stiff, and the stiff fiber ends can irritate the wearer, causing discomfort such as a prickly feeling. In addition, fibril fibers can fall off while wearing the fabric, generating dust. For this reason, cut resistance is mutually exclusive with wearability and dust generation in knitted and woven fabrics made with spun yarns of high-strength fibers.

In other words, high-strength fibers are generally more difficult to cut as the single yarn fineness increases, so it is thought that increasing the single yarn fineness is an effective way to improve the cut resistance of knitted and woven fabrics, but using high-strength fibers with thick fineness dramatically increases the bending stiffness of the short fibers. Therefore, simply using thick spun yarn will only result in a knitted and woven fabric that is cut-resistant but has a strong itchy feel. Conversely, using fine spun yarn with a small single yarn fineness will somewhat eliminate the itchy feel of the knitted and woven fabric, but it will be difficult to take advantage of the cut resistance that is a characteristic of high-strength fibers.

Patent Document 1 discloses cut-resistant gloves knitted from a single or multiple strands of fiber yarn with a fineness of 440 to 1,800 dtex consisting only of fluid-jet-processed organic fibers (but not including elastic fibers), and which suppress the amount of dust generated from the yarn during yarn production and knitting. These cut-resistant gloves have high cut resistance, generate little dust, and have good fit, hardness, and prickly feeling. However, Patent Document 1 does not disclose or suggest interwoven or paralleled yarns that have been fluid-jet-processed with spun yarns, or the paralleled yarns are used to produce knitted or woven fabrics.

Patent Document 2 discloses that a 1,670 dtex/1,250 f (single yarn fineness 1.3 dtex) polyketone fiber multifilament yarn (tensile strength 18 cN/dtex) is cut to a fiber length of 51 mm to produce a spun yarn with a cotton count of 20s/1, which is then combined with a Z-twisted 280 dtex polyketone fiber multifilament yarn and S-twisted (500 T/m) to produce a ply yarn, and six of the ply yarns are combined to produce gloves. The gloves are soft and comfortable to wear, and have a cut resistance of 9 N according to JIS-T-8052 (see Example 1). In addition, the use of fluid-jet-processed yarn as a polyketone fiber multifilament yarn is also suggested, but the characteristics of the fluid-jet-processed yarn and evaluation results of the gloves are not shown, and the specifications of the loom and knitting machine must also be taken into consideration, so it is difficult to predict the characteristics of the knitted fabric (particularly dust generation) from the disclosure in Patent Document 2.

Protective gloves knitted from fluid-processed yarns of ultra-high molecular weight polyethylene fibers or polyketone fibers, which are relatively resistant to fuzzing, are also known (for example, Patent Document 3). However, in gloves knitted from high-strength fibers, cut resistance and low dust generation are in a contradictory relationship, and are also affected by the yarn material (yarn properties), processing method (yarn properties), glove knitting method, etc. For this reason, it is currently difficult to obtain gloves made from spun yarn that combine cut resistance and low dust generation and also provide a satisfactory fit (wearability) when worn.

JP 2020-158919 A JP 2008-308772 A JP 2009-079309 A

The present invention was made in light of the background of the conventional technology, and aims to provide a knitted fabric that has excellent tensile strength and abrasion resistance while taking advantage of the strength of conventional spun yarn knitted fabrics, namely, cut resistance, and improving the disadvantages of spun yarn knitted fabrics, namely, dust generation and wearability.

In order to solve the above problems, the present invention employs the following means.
That is, the present invention provides
A fiber yarn (A) having a fineness of 220 to 1,700 dtex and consisting only of organic fibers that have been fluid-jet processed at an overfeed rate of 3 to 12% ;
A yarn (B) consisting of only organic fibers in which short fiber bundles are spun,
A woven or knitted fabric comprising:
The organic fibers constituting the fiber yarns (A) and (B) are para-aramid fibers,
The fiber yarn (B) is a two-ply spun yarn having a single yarn twist coefficient (K ₁ ) of 2.0 to 4.0;
The woven or knitted fabric is characterized in that it is composed of 10 to 70 mass % of fiber yarn (A) and 90 to 30 mass % of fiber yarn (B) .

According to the present invention, by interweaving an organic fiber yarn having a specific fineness consisting only of fluid-jet-processed organic fibers and an organic fiber yarn consisting of organic fibers spun from short fiber bundles, it is possible to provide a knitted or woven fabric that is not prickly, has excellent cut resistance and low dust generation, as well as excellent tensile strength and abrasion resistance.

The woven fabric of the present invention reduces the number of dust particles with a particle size of 0.1 μm or more by 40% compared to a woven fabric made of spun yarn alone, demonstrating a significant improvement, while maintaining the cutting strength of the woven fabric, providing an interwoven fabric that does not impair the characteristics of conventional woven fabrics made of spun yarn.

FIG. 1 is a schematic diagram showing an example of fluid jet processing of an organic fiber yarn.

The present invention will be described in detail below.
The knitted or woven fabric of the present invention is characterized in that it is formed by interweaving a fiber yarn (A) having a fineness of 220 to 1,700 dtex and consisting only of fluid-jet-processed organic fibers, and a fiber yarn (B) consisting only of organic fibers spun from short fiber bundles.
However, the organic fibers constituting the fiber yarn (A) and the fiber yarn (B) do not contain elastic fibers. Gloves knitted with yarns containing elastic fibers have the advantage of excellent fit when worn, but have a problem in terms of quality control.

<Fiber yarn (A)>

[Organic fiber]
In the above-mentioned fiber yarn (A), the organic fiber can be appropriately selected from known fibers, but as a property of the raw yarn, a continuous fiber of high strength fiber having a tensile strength of 17.5 cN/dtex or more measured according to JIS L 1013 8.5 is preferable. If the tensile strength is less than 17.5 cN/dtex, it tends to be difficult to impart high abrasion resistance to the fiber yarn. The tensile strength of the organic fiber is preferably 17.5 to 35 cN/dtex, more preferably 20 to 35 cN/dtex.

The above organic fibers include para-aramid fibers, meta-aramid fibers, wholly aromatic polyester fibers, polyparaphenylene benzobisoxazole fibers, polyketone fibers, polyamideimide fibers, ultra-high molecular weight polyethylene fibers, high-strength vinylon fibers, etc., from the viewpoint of tensile strength and abrasion resistance. The organic fibers may be used alone or in combination of two or more types. Among these materials, para- and meta-aramid fibers and ultra-high molecular weight polyethylene fibers are preferred because of their excellent wearing comfort when wearing the gloves, and para-aramid fibers are particularly preferred because of their excellent cut resistance. The aramid fibers are preferably used in an amount of 50% by mass or more, more preferably 70 to 90% by mass, and particularly preferably 100% by mass, based on the total amount of organic fibers. As the aramid fibers, meta- and para-aramid fibers can also be used in combination.

The above organic fibers may be commercially available products. Examples of para-aramid fibers include polyparaphenylene terephthalamide fiber (manufactured by DuPont-Toray Co., Ltd., product name "Kevlar" (registered trademark)) and copolyparaphenylene-3,4'-oxydiphenylene terephthalamide fiber (manufactured by Teijin Limited, product name "Technora" (registered trademark)). Among these, polyparaphenylene terephthalamide fiber is preferred because of its high strength, high elastic modulus, cut resistance, and excellent heat resistance.

In addition, examples of fully aromatic polyester fibers include "Vectran" manufactured by Kuraray Co., Ltd., examples of polyparaphenylene benzobisoxazole fibers include "Zylon" manufactured by Toyobo Co., Ltd., and examples of ultra-high molecular weight polyethylene fibers include "IZANAS" and "TUNOOGA" manufactured by Toyobo Co., Ltd., "DYNEEMA" manufactured by DSM, and "SPECTRA" manufactured by Honeywell Incorporated.

[Fiber yarn (A)]
The fiber yarn (A) made of organic fiber has a fineness of 220 to 1,700 dtex. When the fiber yarn has a fineness of less than 220, if the number of paralleled yarns is extremely small, the cut resistance of the knitted fabric is deteriorated, and conversely, if the number of paralleled yarns is large, the productivity of the knitted fabric is deteriorated. On the other hand, if the fiber yarn has a fineness of more than 1,700 dex, the knitting property is deteriorated (it becomes difficult to cut with the knitting machine cutter). The fiber yarn has a fineness of more preferably 440 to 1,700 dtex, and further preferably 600 to 1,700 dtex.

The single fiber fineness of the organic fiber is preferably 0.1 to 10 dtex, more preferably 0.3 to 6 dtex, and particularly preferably 1.0 to 2.5 dtex. If the fiber fineness is less than 0.1 dtex, the strength of the fiber is too weak and it is difficult to form gloves, while if the fiber fineness is more than 10 dtex, the gloves become too stiff.

The number of multifilaments is preferably 1,400 or less, more preferably 100 to 1,200, and even more preferably 200 to 1,100. If the number of multifilaments is 1,400 or less, the glove will not become too stiff and cut resistance can be maintained.

[Fluid jet processing]
The fiber yarn (A) is knitted from a single or multiple aligned fiber yarns that are fluid-processed yarns obtained by subjecting organic fibers to fluid injection processing. The number of aligned yarns is not particularly limited, but is usually 2 to 5, and preferably 2 to 3.

Fluid jet processing is a technique in which fluids such as water, water vapor, and air are forcibly sprayed onto fibers, disrupting the orientation of the fibers with the flow, thereby imparting bulkiness. Organic fibers with a tensile strength of 17.5 cN/dtex or more, such as para-aramid fibers, also have a high tensile modulus, so knitted gloves tend to become stiff, but fluid jet processing can impart bulkiness without damaging the fiber surface.

An example of the fluid jet processing method for organic fibers used in the present invention is shown in Figure 1. Organic fiber thread 1 is supplied from feed roller 2 to fluid processing nozzle 3, where it merges with a fluid supplied to the fluid processing nozzle 3 from another inlet 4 and is sprayed out of the fluid processing nozzle 3, passes through delivery roller 5, and is wound onto a take-up bobbin 7. Organic fiber thread 1 may be supplied from one raw yarn bobbin or from multiple raw yarn bobbins. The organic fiber thread may be of one type, or two or more different types of materials may be supplied to the fluid processing nozzle to be combined.

In fluid jet processing, by selecting processing conditions such as the overfeed rate, yarn thickness, nozzle shape, fluid pressure, and processing speed, various processed yarns can be obtained depending on the application, from highly bulky processed yarns with loop-like fuzz to slightly bulky yarns without loop fuzz. Generally, thin yarns (150 dtex or less) are strongly disturbed by fluid jet processing, so there is a risk of the fiber surface becoming fibrillated in high-strength fibers such as para-aramid fibers. The fineness of the organic fiber yarn of the present invention is 220 to 1,700 dtex, and is not easily disturbed by fluid jet processing, so loops are not easily formed, the fiber surface is not easily damaged, and each yarn becomes a bulky processed yarn with a bulging wave-like sagging shape.

By processing the organic fiber yarn at an overfeed rate of 3 to 12%, more preferably 3 to 8%, and at a fluid injection pressure of 1 MPa or less, a fiber yarn suitable for the cut-resistant glove of the present invention can be obtained. In addition, fibrillation of the organic fiber and scraping of the fiber surface are suppressed, and adhesion of fibril fragments and shavings to the glove is suppressed. Note that "fibrillation" refers to the phenomenon in which a crack occurs in a single fiber and it splits into finer fibers.

The fiber yarn (A) may contain, in addition to the fiber yarn made of the high-strength organic fiber described above, known fiber yarns such as polyamide, polyester, polyacrylonitrile, polyurethane, regenerated fibers such as rayon, semi-synthetic fibers such as acetate, and synthetic fibers such as polyolefin, polyvinyl chloride, polyvinylidene chloride, or phenol. It is preferable that known fibers such as nylon and polyester are contained in the yarn at a ratio of less than about 50% by mass, and more preferably 10 to 30% by mass, within a range that does not impair the effects of the present invention (low dust generation, cut resistance).

The number of fiber yarns (A) constituting the knitted or woven fabric may be one or more. When knitting with multiple yarns, the composition of the organic fiber yarns may be the same or different, and only some of the yarns may contain fibers such as nylon or polyester.

<Fiber yarn (B)>

The fiber yarn (B) is a fiber yarn consisting only of organic fibers spun from short fiber bundles. A single-ply yarn of one fiber yarn or a double-ply yarn of multiple fiber yarns is used.

As the organic fiber, one or more mixed fibers selected from the organic fibers listed in fiber thread (A), regenerated fibers such as rayon, and natural fibers such as cotton and hemp are used. Among them, the high-strength organic fibers listed in fiber thread (A) are preferred because they can improve the tensile strength, tear strength, burst strength, abrasion resistance, and cut resistance of the fabric.

The average fiber length of the short fibers is preferably 35 to 160 mm, and more preferably 45 to 130 mm. Within this range, processing is easy when optimizing the twist coefficient of the spun yarn, and at the same time, the itchy feeling of the knitted or woven fabric can be eliminated, improving workability and wearability. In order to obtain good spinnability, the number of crimps of the short fibers is preferably about 3 to about 12 crimps/inch.

The single fiber fineness of the short fibers is preferably 0.8 to 10.0 dtex, more preferably 1.0 to 6.5 dtex, and particularly preferably 1.2 to 4.5 dtex. If the single fiber fineness is less than 0.8 dtex, the cut resistance measured based on the test method specified in JIS T 8052:2005 "Protective clothing - Mechanical properties - Test method for cut resistance against sharp objects" will be insufficient.

The spun yarn used in the present invention may be organic fiber produced by conventional methods using cotton spinning, staple spinning or worsted spinning equipment. In this case, the fineness (count) of the spun yarn is British cotton count 30 to 70. Here, the finer the spun yarn, the larger the count number.

The spun yarn may be in the form of a single spun yarn or a two-ply spun yarn made by twisting two single spun yarns together in the opposite direction to the single spun yarn. Alternatively, a triple-ply yarn made by twisting three single spun yarns together may be used. Among these spun yarns, two-ply yarns are preferred from the viewpoints of tensile strength that can withstand tension during knitting and excellent cut resistance of the fabric. The count of the two-ply spun yarn is preferably cotton count 10/2s to 60/2s, and within the above range, processability is not significantly impaired. More preferably, it is 15/2s to 50/2s, and even more preferably 20/2s to 40/2s.

It is preferable to optimize the single yarn twist factor (K ₁ ) and the number of twists (T ₁ , T ₂ ) of the single yarn and the two-ply yarn obtained by arranging the single yarn. When twisting the single spun yarn, it is preferable to set the single yarn twist factor (K ₁ ) calculated by the following formula in the range of 2.0 to 4.0. If the single yarn twist factor (K ₁ ) is smaller than 2.0, the entanglement between the short fibers becomes too weak, and the ends of the short fibers protrude from the spun yarn, resulting in a fabric (glove) with a strong scratchy feeling. On the other hand, if the single yarn twist factor (K ₁ ) is larger than 4.0, the twist becomes too strong, and double twist occurs more frequently, resulting in poor processability, a decrease in the tensile strength of the spun yarn, and a poor texture. A more preferable single yarn twist factor (K ₁ ) is in the range of 2.5 to 3.8. The number of twists (T ₁ ) of a single yarn is preferably 13 to 30 t/inch, more preferably 13 to 25 t/inch. The twist direction of a single spun yarn may be either S or Z.

Twist coefficient K ₁ =T/s ^1/2
T: number of twists (t/inch)
s: cotton count

Two single spun yarns having the above-mentioned predetermined twist (twist number _T1 ) are aligned and then processed into a two-ply spun yarn by applying a predetermined reverse twist (twist number _T2 ) to the two-ply yarn using a double twister. The number of twists ( _T2 ) of the two-ply yarn is preferably 100 to 900 t/m, more preferably 150 to 800 t/m.
The two-ply yarn twist factor (K ₂ ) calculated by the above formula is preferably in the range of 2.0 to 6.0. If the two-ply yarn twist factor (K ₂ ) is less than 2.0, the ends of the staple fibers will protrude from the spun yarn, resulting in gloves with a strong itchy feel. If the two-ply yarn twist factor (K ₂ ) is more than 6.0, the twist will be too strong, resulting in increased double twisting, which will deteriorate processability, reduce the tensile strength of the spun yarn, and also result in poor texture. A more preferable two-ply yarn twist factor (K ₂ ) is in the range of 2.0 to 5.0. In this case, it is desirable to twist the spun yarn so that the ratio (T ₂ /T ₁ ) (%) of the number of single yarn first twists (T ₁ ) to the number of two-ply yarn first twists (T ₂ ) is in the range of 30 to 95%, more preferably 50 to 90%.

The spun yarn of the present invention can be produced by cutting organic fiber filaments having a single yarn fineness of 0.8 to 10.0 dtex, forming them into staples, and using conventionally known spinning methods. The staples are made into slivers, which are twisted to a specified twist coefficient using a ring twisting machine or the like, and then further twisted to a specified twist ratio using a double twister or the like.

When producing the spun yarn of the present invention, other staple fibers (e.g., cotton, rayon, polyester, nylon, etc.) may be mixed in at about 30% by mass or less, as long as the effects of the present invention are not hindered. It is preferable that aramid fibers account for 40 to 100% of the total mass of the spun yarn, and it is particularly preferable to use para-aramid fibers at 50 to 100%.

[Woven fabric]
The knitted or woven fabric of the present invention can be obtained by interweaving the fiber yarn (A) and the fiber yarn (B), or by aligning a single or multiple yarns of each of the fibers and feeding the aligned yarns to a knitting machine or a weaving machine.
The ratio (mass ratio) of the fiber threads (A) and (B) to be aligned is preferably fiber threads (A):fiber threads (B)=10-70:90-30. If the ratio of fiber threads (A) is 10 or more, not only the amount of dust generated can be suppressed but also an improvement in abrasion resistance can be expected, and if it is 70 or less, the fabric has an appropriate thickness and is not too thin. The ratio of fiber threads (A) and fiber threads (B) is more preferably 20-60:80-40, and even more preferably 20-50:80-50.

The basis weight of the knitted or woven fabric is not particularly limited, but is preferably 300 to 800 g/m ^2. By keeping it within this range, it is possible to achieve a balance between appropriate fabric thickness and cut resistance. It is more preferably 400 to 700 g/m ² , and even more preferably 500 to 600 g/m ² .

When making knitted fabrics such as gloves in the present invention, it is preferable to feed the aligned yarns of the above-mentioned fiber yarns (A) and (B) to a computerized glove knitting machine SFG or STJ (manufactured by Shima Seiki Mfg. Co., Ltd.) through a tension adjuster whose contact surface with the yarn is matte-finished, and knit the yarn. After the yarn to be knitted is unwound from the package, the main devices present in the yarn path of the knitting machine are a yarn guide plate, a first tension adjuster, an oiling felt, a yarn breakage detection spring, and a second tension adjuster, and then the yarn is guided to a yarn feeder via a top spring, and finally knitted by needles. These two tension adjusters are yarn path guides for applying stable tension to the yarn, and include a washer tensor and a spring tensor, etc.

As a surface finishing method for yarn guides, in addition to matte finish, mirror finish is commonly used. When the contact surface of the yarn guide with the yarn is matte, friction with the yarn is reduced, which mainly suppresses fibrillation of organic fibers in the yarn guide near the package, and in subsequent yarn guides, it is possible to suppress the phenomenon of fragmentation of organic fiber fibrils or scraping of the fiber surface.

Examples of materials for the surface of the tension adjuster that comes into contact with the thread include metal with matte chrome plating; metal coated with ceramics such as titanium, alumina, titanium carbide, Teflon (registered trademark), silicon, etc.; and ceramics such as titanium, alumina, zirconia, etc.

In the present invention, it is effective to use a tension adjuster, which is a yarn path guide for applying tension to the yarn, that has a matte surface on which it comes into contact with the yarn. Examples of such tension adjusters include components that have been treated with a matte finish, or a combination of components whose materials are matte-finished (for example, a tension washer with a matte surface and a tensor shaft made of alumina ceramic). This has the effect of preventing the yarn from rubbing against the yarn and generating a large amount of fibrils and shavings when tension is applied to the yarn to ensure a stable supply of the yarn. Furthermore, it is preferable to use ceramics for the other yarn path guides, which will produce even better effects.

In the present invention, by using the above yarn and further adjusting the knitting method, a glove is obtained in which the number of particles having a particle size of 0.1 μm or more per unit area of the woven or knitted fabric is 12,000 particles/m3 or ^less when dust is generated by the tumbling method of JIS B 9923 and measured with a particle counter. The number of particles generated per two gloves is more preferably 11,000 particles/m3 ^{or less} , and further preferably 10,000 particles/m3 or ^less . The smaller the number of particles, the more desirable it is.

The cutting load measured in the JIS T 8502 Protective clothing - Mechanical properties - Cut resistance test against sharp objects is in the range of 5 to 15 N. The cutting load is more preferably 6 N or more, even more preferably 7 N or more, and particularly preferably 10 N or more. If the cutting load is less than 5 N, the gloves will not function as cut-resistant work gloves, and if it exceeds 15 N, the higher the cut resistance, the better the resistance to blades and burrs, but the gloves will become stiff and uncomfortable to wear.

The present invention will be explained in more detail below using examples and comparative examples, but the present invention is not limited to the following examples. The methods for measuring the physical properties in the following examples and comparative examples are as follows.

[Weight]
The mass per m ² (g/m ² ) was determined in accordance with JIS L 1096:2010 “Testing methods for woven and knitted fabrics”, 8.3 “Mass per unit area”.

[Cutting strength and cut resistance (difficulty in cutting)]
The cutting force (N) of the palm of the glove was measured in accordance with JIS T 8052:2005 "Protective clothing - Mechanical properties - Test method for cut resistance against sharp objects." The higher the cutting force value, the more difficult it was to cut. The measuring machine used was the TDM-100 manufactured by RGI.

[Amount of dust generated]
Four gloves were tested without being washed in a clean room (cleanliness: ISO class 5) using a tumbling dust generation tester to generate dust by the tumbling method of JIS B 9923-1997 (method of measuring contaminant particles in clean room clothing), and the number of particles of each particle size or larger was measured using a particle counter. Measurements were performed five times, and the maximum and minimum values were excluded, and the remaining measured values were averaged to convert the amount of dust generated per two gloves. The drum rotation speed was 30 rpm, and the exhaust air flow rate was 0.0102 m ³ /sec.

[Tensile strength]
In accordance with JIS L 1095:2010 General spun yarn test method, the tensile strength of the constituent yarns (paralleled) was measured using a Tensilon universal testing machine with a gripping distance of 20 cm and a pulling speed of 20 cm/min.

[Wear resistance]
It was based on JIS L 1096:2010 “Testing methods for woven and knitted fabrics”, 8.19 “Abrasion resistance” F-2 method (abrasive paper method).

[Glove wearing evaluation (fit, hardness, prickiness)]
A wearing test was conducted by five subjects. According to 5.2 of EN 420:2003 Protective gloves -General requirements and test methods, all subjects gave a performance rating of level 5 for Dexterity, and in the sensory evaluation, five out of five subjects rated "good wearing comfort" as pass (◎), three out of five subjects rated "good wearing comfort" as pass (○), and the rest were rated "failed" (×). In addition, three out of five subjects rated "no prickly feeling" as "none", and those rated "prickly feeling" as "present" in the sensory evaluation.

[Production Example 1 (Fluid-processed yarn)]
A filament yarn of polyparaphenylene terephthalamide (hereinafter, PPTA) fiber (manufactured by DuPont-Toray Co., Ltd., product name "Kevlar" (registered trademark)) with a single fiber fineness of 1.67 dtex and a total fineness of 1,670 dtex was used. A fluid-processed yarn of PPTA filaments was obtained by fluid-processing using the Taslan method with the fluid-processing device shown in Figure 1, with an overfeed rate set to 3-12%, and steam as the fluid. The fluid-processed yarn was a non-twisted yarn.

[Production Example 2 (Spun Yarn)]
As the aramid staple fiber yarn, 100% para-aramid staple fiber having a fiber length of 51 mm and a crimp number of about 8 crimps/inch, which was obtained by stapling a para-aramid fiber having a fineness of 1.67 dtex ("Kevlar(R) 29" manufactured by Toray DuPont Co., Ltd., tensile strength 20.3 cN/dtex), was used.
This was passed through a cotton opener, carding, and drawing to obtain a sliver. Next, this was set in a ring spinning machine and twisted with a twist number ( _T1 ) of 13 t/inch, a twist coefficient of 2.9, and a Z-twist direction to obtain a single spun yarn with a yarn count of 20 (cotton count) and a tensile strength of 2,415 g. Two of these spun yarns were aligned and reverse (S) twisted with a twist number ( _T2 ) of 340 t/m in a double twister to obtain a two-ply yarn with a yarn count of 20/2s (cotton count) and a tensile strength of 5,259 g.

[Production Example 3 (Fluid-processed yarn)]
A fluid-processed yarn was obtained in the same manner as in Production Example 1, except that a filament yarn of PPTA fiber (manufactured by DuPont-Toray Co., Ltd., product name "Kevlar" (registered trademark)) having a single fiber fineness of 1.67 dtex and a total fineness of 220 dtex was used.

Example 1
One fluid-processed yarn produced in Production Example 1 and two two-ply spun yarns produced in Production Example 2 were aligned and fed into a 7-gauge glove knitting machine (manufactured by Shima Seiki Mfg. Co., Ltd.), and seamless gloves were knitted in the usual manner, except that two washer tensors with matte surfaces were used among the yarn guides. The weight of the two gloves was 30.6 g.
That is, the yarn guide section of the tensor shaft of the washer tensor was an alumina ceramic guide (YM99C manufactured by Yuasa Shido Co., Ltd., density 3.8, hardness 1,800, Rmax 1.5 μm), the two tension washers on the top and bottom were made of matte chrome plating, and the other yarn guides were not changed from the knitting machine specifications, and a mixture of alumina ceramic, matte chrome plating and non-plated guides was used.

The glove produced in Example 1 had a dust particle count of 0.1 μm or more per unit area of the glove of 12,000 particles/ ^m3 or less (low dust generation), and a cut strength of 11.6 N. There was no prickly feeling, and the wear evaluation was also good. As a result, a low dust generation glove was obtained that had improved tensile strength and abrasion resistance compared to a glove knitted with a single spun yarn.

(Comparative Example 1)
A seamless glove was knitted in the same manner as in Example 1, except that five strands of the spun yarn produced in Production Example 2 were used. The obtained glove had excellent cut resistance, but generated a large amount of dust, had a prickly feeling, and had a poor wearing evaluation.

Example 2
A seamless glove was knitted in the same manner as in Example 1, except that two fluid-processed yarns produced in Production Example 3 and two two-ply spun yarns produced in Production Example 2 were used.

(Comparative Example 2)
A seamless glove was knitted in the same manner as in Example 1, except that three strands of the spun yarn prepared in Production Example 2 were used.

The glove composition and evaluation results are summarized in Table 1.

From Table 1, it can be seen that by knitting and weaving a fabric using organic fiber yarn having a fineness of 220 to 1,700 dtex that has been fluid-jet processed at an overfeed rate of 3 to 12% and paralleled spun yarn (two-ply yarn), a knitted or woven fabric can be obtained that has a cut resistance of 5N to 15N and a dust generation rate of 12,000 particles/m3 or ^less with a particle size of 0.1 μm or more per unit area of the knitted or woven fabric, and thus has low dust generation compared to gloves made from conventional spun yarn, and is excellent in cut resistance, abrasion resistance and tensile strength.

Although the knitted fabric of the present invention is made of spun yarn, it is useful as work gloves and work clothes that are relatively sensitive to dust contamination. Therefore, it is useful as work gloves and clothes in the fishing, agriculture, food industry, medical and high-tech industries, etc., or as sports gloves and clothes.

1 Organic fiber yarn 2 Feed roller 3 Fluid processing nozzle 4 Fluid inlet 5 Delivery roller 6 Winding roller 7 Winding bobbin

Claims (4)

A fiber yarn (A) having a fineness of 220 to 1,700 dtex and consisting only of organic fibers that have been fluid-jet processed at an overfeed rate of 3 to 12% ;
A yarn (B) consisting of only organic fibers in which short fiber bundles are spun,
A woven or knitted fabric comprising:
The organic fibers constituting the fiber yarns (A) and (B) are para-aramid fibers,
The fiber yarn (B) is a two-ply spun yarn having a single yarn twist coefficient (K ₁ ) of 2.0 to 4.0;
The woven or knitted fabric is characterized in that it is composed of 10 to 70 mass % of fiber yarn (A) and 90 to 30 mass % of fiber yarn (B) . 2. The knitted or woven fabric according to claim 1 , wherein the number of multifilaments in the fiber yarn (A) is 1,400 or less, and the single fiber fineness of the fiber yarn (B) is 5 dtex or less. 2. The knitted fabric according to claim 1 , wherein the para-aramid fiber is a polyparaphenylene terephthalamide fiber . The knitted or woven fabric according to any one of claims 1 to 3 , which simultaneously satisfies the following (1) and (2).
(1) In accordance with JIS B 9923, dust is generated by a tumbling method and the number of particles having a particle size of 0.1 μm or more, as measured with a particle counter, is 12,000 particles/m3 or ^less per unit area of the woven or knitted fabric.
(2) The cutting load value measured in the JIS T 8502 Protective clothing - Mechanical properties - Cut resistance test against sharp objects is in the range of 5 to 15 N.