JP2013204202A - Composite yarn and woven or knitted fabric including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite yarn that can impart a fit feeling, a texture, flexibility and cut resistance to a woven or knitted fabric, and to provide a woven or knitted fabric to which the aforementioned characteristics are imparted by including the composite yarn.SOLUTION: The composite yarn includes at least an aramid multifilament yarn A composition, an aramid multifilament yarn B composition and an elastic yarn, is free from a loop and/or a slack on a yarn surface under a load of 0.08826 cN/dtex, has a slack on the yarn surface under a load of 0.0008826 cN/dtex, and a stretch recovery percentage E(A) of the aramid multifilament yarn A composition and a stretch recovery percentage E(B) of the aramid multifilament yarn B composition satisfy 5%≤E(A)≤20% and 5%≤E(B)≤20%. The woven or knitted fabric includes the composite yarn.

Description

  The present invention relates to a composite yarn and a woven or knitted fabric thereof, and more particularly to a composite yarn and a woven or knitted fabric thereof that can be suitably used for protective clothing.

  Covering yarn with elastic yarn as core yarn and aramid crimped yarn as sheath yarn (hereinafter referred to as “coated yarn”) is excellent in stretchability, heat resistance, mechanical strength and appearance, and can be applied to the body such as hands. It is known that it is a well-balanced and highly functional yarn in that it fits well, has good workability, and hardly generates fluff and dust (see Patent Documents 1 and 2).

  However, in the above-described coated yarn, when the aramid crimped yarn serving as the sheath yarn is spirally wound around the elastic yarn serving as the core yarn in the covering step, the covering yarn is substantially entered and the sheath yarn is focused. It is in a state. Therefore, the twisting property of the crimped yarn (shrinking power) is inhibited by this twist, and at the same time, the elastic yarn has the property of shrinking (shrinking power). Therefore, with the above-mentioned coated yarn, the fabric weight tends to be small and has excellent cut resistance (cutting force in JIS T 8052: 8.5 N or more, or cutting result level of EN388: stable equivalent to 3 or more) It was difficult to get.

  Furthermore, since the fibers are aligned in one direction when the sheath yarn is twisted, the texture of the knitted knitted fabric becomes like a raw yarn. For example, when a glove is knitted, a feeling of fit (tightness, stretch), texture, There was a problem in terms of flexibility.

JP 2003-193345 A JP 2003-193314 A

  In view of the background of such prior art, the present invention provides a composite yarn capable of imparting a feeling of fit, texture, flexibility and cut resistance to a woven or knitted fabric, and a woven or knitted fabric having the above-mentioned characteristics by including the composite yarn. It is an issue to provide.

  As a result of intensive studies in order to solve such problems, the present inventors have found that the above problems can be solved by using the following composite yarn, and have reached the present invention.

  That is, the present invention is as follows.

(1) It is composed of at least an aramid multifilament yarn A component, an aramid multifilament yarn B component, and an elastic yarn, and has no loops and / or no tarmi on the yarn surface under a load of 0.08826 cN / dtex, and 0.0008826 cN / Under the load of dtex, the yarn surface has talmi, and the expansion / contraction recovery rate E (A) of the aramid multifilament yarn A component and the expansion / contraction recovery rate E (B) of the aramid multifilament yarn B component satisfy the following expressions: Composite yarn characterized by
5% ≦ E (A) ≦ 20%, 5% ≦ E (B) ≦ 20%
(2) The composite yarn according to (1) above, wherein the stretch rate of the composite yarn is 50% or more and 200% or less.
(3) The composite yarn according to (1) or (2), wherein the aramid multifilament yarn A component and the aramid multifilament yarn B component are torque yarns, and the torques are in opposite directions.
(4) The composite yarn according to any one of (1) to (3), wherein the aramid multifilament yarn A component and the aramid multifilament yarn B component are non-twisted.
(5) The composite yarn according to any one of (1) to (4) above, wherein the composite yarn is a non-torque yarn.
(6) The composite yarn according to any one of (1) to (5), wherein the elastic yarn is a polyurethane elastic yarn.
(7) A woven or knitted fabric comprising the composite yarn according to any one of (1) to (6) above.
(8) A protective garment comprising the woven or knitted fabric according to (7) above.
(9) The protective clothing according to (8) above, wherein the protective clothing is a glove.

  According to the present invention, it is possible to impart a high level of cut resistance, soft texture, softness and fit that have not been obtained in the past to a woven or knitted fabric. The woven or knitted fabric is suitable for protective clothing that requires cut resistance, such as gloves, clothes, inner materials, and hats.

It is an enlarged side view which shows an example of the composite yarn of this invention. It is the schematic which shows an example of the manufacturing method of the composite yarn of this invention.

  Hereinafter, the present invention will be described in detail.

  The composite yarn of the present invention is composed of at least an aramid multifilament yarn A component, an aramid multifilament yarn B component, and an elastic yarn, and does not have loops and / or talmi on the yarn surface under a load of 0.08826 cN / dtex, Under a load of 0.0008826 cN / dtex, it is necessary to have a tarmi on the yarn surface.

  If loops and / or talmi are present on the surface of the yarn under a load of 0.08826 cN / dtex, the talmi and loops of adjacent yarns may be caught during weaving, which is not preferable. Or, when the knitting machine is threaded, a tarmi or a loop is caught in the yarn feeder and the tarmi or the loop is displaced, which deteriorates the quality of the knitted fabric.

  Under the load of 0.0008826 cN / dtex, the presence of tarmi on the yarn surface relaxes the tension applied to the composite yarn after weaving or knitting, so that the woven fabric or knitted fabric swells, When used as a garment, the fabric has a feeling of swelling, so it feels good when worn.

  Such composite yarns must contain elastic elastic yarns. The elastic yarn preferably has a breaking elongation of 300% or more, and if it is less than 300%, there is a possibility that sufficient elasticity cannot be obtained when it is made into a woven or knitted fabric. In addition, by including elastic elastic yarns, the stretch elongation rate of the composite yarn of the present invention can be 50% or more and 200% or less. If the stretch / extension ratio is less than 50%, sufficient stretchability cannot be obtained when a woven or knitted fabric is formed. On the other hand, when the stretch / stretch rate exceeds 200%, the stretchability is too strong when the woven or knitted fabric is used, and when the garment is used, the tightening is too strong and the wearing comfort is poor.

  A known elastic yarn can be used as the elastic yarn, but a polyurethane elastic yarn having high stretchability is preferably used.

  The fineness of the elastic yarn is preferably in the range of 11 to 940 dtex, and more preferably in the range of 22 to 350 dtex. If it is 11 dtex or more, it is difficult to cause yarn breakage during the production of the composite yarn and the knitted or knitted fabric production process, and a satisfactory fit when wearing protective clothing can be obtained. On the other hand, if it is 940 dtex or less, the fit and flexibility at the time of wearing are less likely to deteriorate when the protective yarn is used without the power of stretching and shrinking the composite yarn being too strong.

  The cross-sectional shape of the elastic yarn is not particularly limited, and may be circular or flat. The yarn may be a monofilament or a welded multifilament.

  The composite yarn of the present invention may contain an aramid multifilament yarn A component and an aramid multifilament yarn B component from the viewpoint of excellent tensile strength, wear resistance, heat resistance, flame retardancy and cut resistance. is necessary.

It is necessary that the expansion / contraction recovery rate E (A) of the aramid multifilament yarn A component and the expansion / contraction recovery rate E (B) of the aramid multifilament yarn B component satisfy the following expressions.
5% ≦ E (A) ≦ 20%, 5% ≦ E (B) ≦ 20%

  When E (A) and E (B) are less than 5%, the stretchability of the aramid multifilament yarn A component and the stretchability of the aramid multifilament yarn B component are small, so that in the composite yarn of the present invention, 0.0008826 cN The surface tension of the yarn surface under the load of / dtex tends to be too large, and the surface quality tends to deteriorate when a woven or knitted fabric is formed. In addition, the texture of the woven or knitted fabric is like raw silk, and the soft feeling and flexibility are deteriorated. When E (A) and E (B) exceed 20%, the stretchability of the aramid multifilament yarn A component and the stretchability of the aramid multifilament yarn B component are large. Therefore, in the composite yarn of the present invention, 0.08826 cN / Under the load of dtex, loops and / or talmi tend to be generated on the surface of the yarn, which is not preferable from the above point.

  The state having the tarmi is as shown in FIG. 1, and the elastic yarn, the aramid multifilament yarn A component, and the aramid multifilament yarn B component form the basic line (AZ), but a part thereof In the situation where the A component and / or the B component leaves the basic line (A-Z) and has a bypass line (for example, B-C-D, D-E-F, G-H-I) Yes, these bypass lines are called Talmi. Tarmi may form a loop. It is preferable that any one of the lengths (for example, the BD distance, the DF distance, and the GI distance) between the intersections of the basic line and the bypass line is 1.0 mm or more. More preferably, it is 2.0 mm or more and 10 mm or less. The distance between the basic line (AZ) and the bypass line is preferably 0.5 mm or more and 10 mm or less. Tarmi is preferably an aramid multifilament yarn A component and an aramid multifilament yarn B component. By having the talmi, the talmi, that is, the aramid multifilament yarn A component and the aramid multifilament yarn B component appear on the surface of the woven or knitted fabric. When you touch the knitted or knitted fabric with your hand, the soft feeling is mainly transmitted to your hand.

  The aramid multifilament yarn A component and the aramid multifilament yarn B component are preferably torque yarns. When woven or knitted, the torque yarn is restrained and cannot be kinked freely. However, the torque yarn becomes bulky because it tries to shrink the thread structure into a helical shape so as to relieve the torque. That is, the woven or knitted fabric becomes bulky. Torque yarn is defined as a stretch yarn that is twisted in either direction when suspended in a free state in JIS L0205-1972 fiber term (yarn section). Examples of the torque yarn include an aramid crimped yarn manufactured by a manufacturing method described later.

  Moreover, it is preferable that the torques of the aramid multifilament yarn A component and the aramid multifilament yarn B component are opposite to each other. When the torques are opposite to each other, in the composite yarn of the present invention, the surface tension of the yarn existing under a load of 0.0008826 cN / dtex can exist with the filaments scattered. This is because when the A component filament is kinked, the B component filament is kinked in the opposite direction to the A component filament, so the A component filament cannot be kinked and the multifilament converges. It is because it cannot be done.

  In addition, the presence of the filaments in a loose state increases the feeling of swelling when woven or knitted, and is excellent in wearing comfort. When the blade hits the knitted or knitted fabric, if the filament is converged, the filament is immediately tensioned and easily cut, but if the filament is scattered, the filament converges and tension is applied. Takes a long time (that is, the kinetic energy of the blade is consumed), making the filament difficult to cut.

  On the other hand, when the torques of the aramid multifilament yarn A component and the aramid multifilament yarn B component are in the same direction, in the composite yarn of the present invention, the yarn surface tarmi present under a load of 0.0008826 cN / dtex Since the filaments try to move in the same direction, the multifilaments converge. When the multifilament converges, the cut resistance of the woven or knitted fabric is deteriorated for the reason described above.

  Further, when the torques of the aramid multifilament yarn A component and the aramid multifilament yarn B component are in the opposite directions and approximately equal, the composite yarn becomes a non-torque yarn. In the case of a non-torque yarn, when the knitted fabric is used, the knitted fabric is not skewed.

  The aramid multifilament yarn A component and the aramid multifilament yarn B component are preferably untwisted. By being non-twisted, the multifilaments do not converge due to the effect of the torque described above, and can maintain a loose state. On the contrary, if the twist is included, the multifilament has already converged due to the twist, and therefore the texture of the woven or knitted fabric tends to become hard, which is not preferable. Further, the cut resistance of the woven or knitted fabric is deteriorated.

  Aramid crimped yarns produced by various production methods can be used. However, a twisting step of adding a twist to the aramid multifilament yarn, followed by heat treatment without using high-temperature high-pressure steam or high-temperature high-pressure water, that is, drying. It is preferably manufactured by performing a heat treatment step and further a untwisting step for untwisting the twist. By adopting the dry heat treatment, there is an advantage that the stretch elongation rate of the crimped yarn can be increased.

  Examples of the method for producing a crimped yarn include a continuous false twisting method and a batch (non-continuous) production method. Among them, a crimped yarn having a high stretch elongation rate can be obtained, and a crimped yarn. The continuous false-twisting method is preferable in that the fibers are separated and the untwisted state is good, and the crimped yarn can be shaped so as to wrap the elastic yarn when processed into a composite yarn.

  Examples of the aramid fiber include polyparaphenylene terephthalamide fiber (manufactured by Toray DuPont, trade name “Kevlar”), copolyparaphenylene-3,4′-diphenyl ether terephthalamide fiber (manufactured by Teijin Techno Products, trade name “Technola”). ") Etc. Among these, polyparaphenylene terephthalamide fiber is preferable because it has high strength and high elastic modulus and is excellent in heat resistance and cut resistance.

  The fineness of the aramid multifilament yarn and the number of filaments may be appropriately selected according to the purpose of use in consideration of the texture, flexibility, fit, etc. of the woven or knitted fabric, and the fineness (total fineness) is 20 to 1,600 dtex. A range is preferred. The single fiber fineness is preferably in the range of 0.1 to 10 dtex, more preferably in the range of 0.4 to 5 dtex.

  In the false twisting method using the above-mentioned continuous false twisting method, the yarn drawn from the supply yarn cheese by the feeding roller passes through the heater, false twisting device, and delivery roller, and is taken up by the take-up roller. Rolled up. In the false twisting device, for example, a false twist spindle can be equipped with a spinner, and when the yarn is wound around the spinner pin and the spindle is rotated, the yarn between the feed roller and false twist spindle is, for example, S twisted. Added (twisting step). The twisted yarn is heat set (dry heat treatment) with a heater, and untwisted (untwisted) by applying a Z twist, for example, opposite to the above, between the false twist spindle and the delivery roller. Process), and becomes a crimped yarn. It is a cooling zone between the heater outlet and the false twisting device, and it is preferable to leave it to air cooling. In addition to the above-mentioned false twist spindle, the false twisting method is a method in which the yarn is brought into contact with the inner wall of a cylinder that rotates at high speed, the outer periphery of a disk, or the surface of a belt that runs at high speed, and the false twist is applied by friction, that is, a nip belt, A friction disk or the like is used.

The number of false twists by the false twist spindle is such that the value of the twist coefficient (K ₁ ) represented by the following formula is about 4,500 to 9 in order to appropriately crimp the yarn and prevent cutting of the fiber due to excessive twisting. It is preferable that it is about 1,000. When twisting with a false twist spindle, a spinner of 1 pin, 2 pins, 4 pins can be used.

K ₁ = t × D ^1/2 [where t represents the number of false twists (times / m), and D represents the fineness (tex). ]

  As the temperature condition of the heat setting in the dry heat treatment, it is desirable that the atmospheric temperature inside the heater through which the yarn passes, that is, the heater temperature is 300 to 650 ° C, more preferably 350 to 600 ° C. The heater in the dry heat treatment may be a contact heater or a non-contact heater, and may be performed by a known means. The heating time varies depending on the type of fiber, the thickness of the yarn, the heating temperature, and the like, and thus cannot be generally stated, but usually about 0.1 to 2 seconds is desirable. The range is preferably about 0.3 to 1.5 seconds. The dry heat treatment may be performed under pressure, under reduced pressure, or normal pressure, but in normal continuous false twisting, it is preferably performed under normal pressure.

  In the above production method, it is desirable to use an aramid fiber before false twisting having a moisture content of preferably 20% or less, more preferably 15% or less, and particularly preferably 1 to 10%. In this case, D in the above formula represents the fineness (tex) containing moisture. If the moisture content before twisting exceeds 20%, heat is not efficiently transferred to the yarn in the dry heat treatment and the heat setting effect cannot be obtained, so that it is difficult to obtain a good crimped yarn. If the moisture content is less than 1%, the yarn may fibrillate due to rubbing of the yarn path guide or the like.

The aramid crimped yarn preferably has a strength retention of 25% or more, more preferably 30% or more, and still more preferably 40%, as a guideline that there is no decrease in strength of the aramid fiber by false twisting. That's it. The strength retention rate can be calculated from the following formula.
Strength retention ratio (%) = {Strength of crimped yarn (N / tex) / Strength of raw yarn (N / tex)} × 100

  In the composite yarn of the present invention, the method of combining the aramid multifilament yarn A component, the aramid multifilament yarn B component and the elastic yarn is as follows. FIG. 2 is a schematic view showing an example of a method for producing a composite yarn of the present invention.

  For example, the aramid multifilament yarn A component YA and the aramid multifilament B component YB are drafted between the feed roller 1 and the elastic yarn YC is drafted between the elastic yarn feed roller 7 and the feed roller 2, and these are mixed through the feed roller 2. What is necessary is just to supply to the fine nozzle 3 and to send out the thread | yarn which came out of the mixed fiber nozzle 3 with the deli berry roller 4, and to wind up to the package 6 with the winding roller 5. FIG.

  The draft magnification of the elastic yarn YC is preferably in the range of 1.5 to 5.0 times, more preferably 2.0 to 4.0 times. When the draft magnification is too high, the power of stretching and shrinking the composite yarn is too strong, so that the fit and flexibility when wearing clothing are deteriorated.

  In order to obtain a composite yarn having no loop or tarmi on the surface of the thread under a load of 0.08826 cN / dtex, and having a thread on the surface of the thread under a load of 0.0008826 cN / dtex, the speed of the delivery roller 4 is increased. On the other hand, the speed of the feed roller 1 and the speed of the feed roller 2 may be increased. The rate of speeding up is called overfeed. As a result, when leaving the blend nozzle, the aramid multifilament yarn A component and the aramid multifilament yarn B component are intertwined to hold the elastic yarn, and the aramid multifilament yarn A component and the aramid multifilament yarn B The portions where the component and the elastic yarn are not entangled are alternately formed.

  The overfeed is preferably in the range of 0.5 to 2%. The overfeed of the feed roller 1 and the overfeed of the feed roller 2 may be the same or different. The overfeed is appropriately adjusted according to the condition of the sagging of the composite yarn.

  Here, the fiber mixing nozzle 3 may be a rectifying entanglement nozzle, a turbulent entanglement nozzle, or the like. Among them, it is more preferable to use a rectifying / entanglement nozzle that does not generate tarmi.

  The pressure of the compressed air supplied to the blended nozzle 3 is not particularly limited, but according to the knowledge of the present inventors, 0.1 to 1.0 MPa is preferable, and more preferably 0.3 to 0. .6 MPa. The pressure may be appropriately adjusted in consideration of processing stability.

  The composite yarn of the present invention preferably contains an elastic yarn in an amount of about 30% or less, preferably about 3 to 10%. The composite yarn may contain known fibers such as nylon and polyester as long as the effects of the present invention are not impaired.

The woven or knitted fabric containing the composite yarn of the present invention can be a woven or knitted fabric with a high basis weight, and is particularly useful for protective clothing requiring cut resistance. Of woven or knitted fabric basis weight but is not particularly limited, in order to sufficiently exhibit the switching-creation, preferably 380 g / m ² or more, more preferably 400 g / m ² or more.

  The yarn constituting the knitted or knitted fabric may be composed only of the composite yarn of the present invention, or may be knitted or woven with other fibers as long as the cut resistance is not impaired. Further, the yarn constituting the woven or knitted fabric may be one composite yarn of the present invention or a plurality of yarns as long as the knitting property is not hindered. When knitting with a plurality of yarns, the other yarn may be a yarn containing a known fiber such as nylon, polyester, or elastic yarn.

  The woven or knitted fabric of the present invention is useful for the following protective clothing. For example, it is suitable as heat-resistant work clothes used in scenes exposed to high temperatures such as flames, sparks, molten metal, work clothing that protects the human body from protrusions and sharp debris, and clothing materials for various sports and outdoor activities And can be used as the outer and / or lining, middle or underwear of these garments. Specifically, there are fire clothes, garment work clothes, welding work clothes, automobile racer clothes, various gloves and socks, aprons, arm covers, spats, balaclava and the like.

  In addition, because the knitted or knitted fabric of the present invention is composed of a composite yarn composed of filament yarns, it is different from a spun yarn product that generates fluff and dust, and clean room and precision equipment assembly work where fluff and dust are a problem It is also useful for protective clothing such as work clothes and gloves and arm covers.

  Furthermore, the prepared glove is attached to a hand mold, and the glove is impregnated with a coating material, and then dried, or the rubber is bonded to the glove and bonded to the glove, whereby the rubber is adhered to the surface of the glove. Alternatively, by providing a resin coating layer, it is possible to produce a glove that has not only characteristics such as heat resistance and cut resistance, but also wear resistance, water resistance, and the like, and is difficult to slip when grasping an object.

  Examples of the coating layer include polyurethane resin, vinyl chloride resin, latex, synthetic rubber, and natural rubber. In particular, a polyurethane resin when used as a coating material is preferable from the viewpoints of good adhesion to polyurethane elastic yarns, excellent flexibility and waterproofness of gloves after coating, and excellent wear resistance of the coating layer. Examples of the polyurethane resin coating material include water-based dispersions and solvent-based polyurethane resins, but solvent-based polyurethane resins are preferred from the viewpoint that a tougher film can be formed.

  The coating material is a conventionally known method. For example, a wet film-forming polyurethane resin dissolved in a DMF (N, N-dimethylformamide) solvent, a dry processing polyurethane resin dissolved in a xylene / IPA mixed solvent, or the like is used. Can do.

  The covering layer may be applied to at least a part of the glove surface. It can be applied to almost the entire palm side and fingertips, or to the entire surface including the upper side, or only to the specified fingertips. It may be possible to use other forms.

  In addition, the woven or knitted fabric of the present invention is also useful as a resin reinforcing material. By impregnating the woven or knitted fabric with an elastomer or by adhering it to the elastomer, a membrane material having heat resistance or heat resistance and high strength can be obtained. It is done. For example, it is useful as a reinforcing material for a film material using an elastomer such as a vehicle requiring flame retardancy, that is, a train or an automobile. Specific examples include train vehicles, vehicle-connected hoods, and removable hoods.

  In addition, the woven or knitted fabric of the present invention has elasticity and is easy to follow the uneven surface, and therefore, a reinforcing cloth (covering cloth) disposed on the tooth surface to prevent wear on the tooth surface of the timing belt, It is also useful as a reinforcing material for industrial rubber products. It is also useful as a reinforcing material for buildings and structures. For example, train viaduct pillars, building pillars, road floors and the like are reinforced with resin and high-strength fibers. When the reinforcing surface has irregularities, high-performance filament woven fabric without elasticity has been used in the past, but since it did not adhere to the irregular surface, an air layer or a resin pool was formed, which caused the reinforcing effect to be reduced . When the woven or knitted fabric of the present invention is used as a fiber reinforcing material in such reinforcement, it adheres well to the uneven surface of a reinforcing part such as a building or a structure, so that no air layer or resin accumulation occurs.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples. Moreover, the evaluation method of each physical property depended on the following method.

[Thread loops, tarmi]
The upper end of the thread (about 30 cm) is fixed with a clamp, suspended with a load of 0.08826 cN / dtex, and after 30 seconds, the presence or absence of loops and tarmi is visually determined.
Next, the load of 0.08826 cN / dtex is removed, the load of 0.0008826 cN / dtex is applied, it is suspended, and after 30 seconds, the presence or absence of loops and tarmi is visually determined.

[Expansion / extension rate]
JIS L 1013: 2010 Chemical fiber filament yarn test method 8.11. The stretch / elongation rate was measured by A method. As a pretreatment before the measurement, the measurement sample was skeined and wrapped in gauze, followed by a hot water treatment at 90 ° C. for 20 minutes, followed by natural drying at room temperature.

[Expansion and restoration rate]
JIS L 1013: 2010 Chemical fiber filament yarn test method 8.12 The stretch recovery rate was measured by the method. As a pretreatment before the measurement, the measurement sample was skeined and wrapped in gauze, followed by a hot water treatment at 90 ° C. for 20 minutes, followed by natural drying at room temperature.

[torque]
A constant load (0.08826 cN / dtex) is hung at one end of the yarn, and the yarn length is 1 m. The both ends are put together, and a load (0.00176 cN / dtex) is hung on the other side (central part of both ends) to make it free. One yarn end is tied, and the load is suspended and left in the leaving box until the yarn stops rotating. When the rotation of the yarn stops, remove the load while holding both ends of the yarn and set it on the clamp of the inspection machine to check the rotation speed and twist direction of the yarn. The number of rotations of the yarn is the number of torques (times / 0.5 m).

[Cut resistance (cut resistance)]
JIS T 8052: 2005 Protective clothing-Mechanical properties-Measured by a cutting resistance test method for sharp objects. The knife used was a feather safety razor.

[Evaluation of wearing gloves]
A wearing test with five subjects was performed. The evaluation items are the fit feeling when wearing gloves, the texture relating to the touch, the flexibility relating to the grip, the surface quality relating to the appearance of the product, and the evaluation level is very good (◎), good (○ ), Sensory evaluation was carried out in 4 stages of slightly bad (Δ) and bad (×), and an average evaluation of 5 persons was made.

Example 1
Polyparaphenylene terephthalamide fiber (hereinafter referred to as “PPTA”) having a total fineness of 444 dtex, a single fiber fineness of 1.66 dtex, a filament number of 267, a tensile strength of 2.03 N / tex, and a moisture content of 7% (Toray Dupont ( Para false aramid crimped yarn (twisting coefficient) with 40% strength retention using continuous false twisting under the following processing conditions using multifilament yarns manufactured by Kogyo Co., Ltd. and trade name “Kevlar” (registered trademark) (K ₁ ) = 7,663) was obtained.

False twisting speed: 60 m / min
False twisting temperature (dry heat): 500 ° C
Number of false twists t: 1,150 times / m
False twist direction: S twist or Z twist Spindle rotation speed: 69,000 rpm

Polyurethane elastic yarn having a fineness of 117 dtex and a breaking elongation of 530% (manufactured by Toray Operontex Co., Ltd., trade name “Lycra” (registered trademark)), and two para-aramid crimped yarns obtained above (S, A composite yarn was obtained by the above-described production method using one Z twisted yarn). Prior to the supply to the rectifying / entanglement nozzle, the polyurethane elastic yarn was drafted three times. The overfeed of the feed roller 1 was 1.2%. The overfeed of the feed roller 2 was 1.2%. The air jet pressure was 0.4 MPa.
In the obtained composite yarn, the aramid crimped yarn was present with the filaments scattered in an untwisted state.

One piece of the obtained composite yarn was supplied to a 10 gauge type glove knitting machine (Shimane Seiki Seisakusho Co., Ltd.), and a glove having a weight of 13.8 g / sheet and a palm weight of 453 g / m ² was knitted.

(Example 2)
Polyparaphenylene terephthalamide fiber (hereinafter referred to as “PPTA”) having a total fineness of 222 dtex, a single fiber fineness of 1.66 dtex, 134 filaments, a tensile strength of 2.03 N / tex, and a moisture content of 7% (Toray DuPont) Para false aramid crimped yarn (twisting coefficient) with 45% strength retention using continuous false twisting under the following processing conditions using multi-filament yarns manufactured by Kogyo Co., Ltd. and trade name “Kevlar” (registered trademark) (K ₁ ) = 6,832) was obtained.

False twisting speed: 80m / min
False twisting temperature (dry heat): 480 ° C
Number of false twists t: 1,450 times / m
False twist direction: S twist or Z twist Spindle rotation speed: 116,000 rpm

Polyurethane elastic yarn having a fineness of 78 dtex and a breaking elongation of 530% (manufactured by Toray Operontex Co., Ltd., trade name “Lycra” (registered trademark)), and two para-aramid crimped yarns obtained above (S, A composite yarn was obtained by the above-described production method using one Z twisted yarn). Prior to the supply to the rectifying / entanglement nozzle, the polyurethane elastic yarn was drafted three times. The overfeed of the feed roller 1 was 1.3%. The overfeed of the feed roller 2 was 1.3%. The air jet pressure was 0.4 MPa.
In the obtained composite yarn, the aramid crimped yarn was present with the filaments scattered in an untwisted state.

One obtained composite yarn was supplied to a 10 gauge type glove knitting machine (Shimane Seiki Seisakusho Co., Ltd.), and a glove having a weight of 13.2 g / sheet and a palm weight of 490 g / m ² was knitted.

(Example 3)
In Example 1, the polyurethane elastic yarn was drafted twice.

Example 4
In Example 1, the polyurethane elastic yarn was drafted 4 times.

(Example 5)
In Example 1, the number of false twists t was 700 times / m, and the number of spindle rotations was 42,000 rpm. A para-aramid crimped yarn (twisting coefficient (K ₁ ) = 4,664) having a strength retention of 45% was obtained.

(Example 6)
In Example 1, the number of false twists t was 1,350 times / m and the spindle rotation speed was 81,000 rpm. A para-aramid crimped yarn having a strength retention of 40% (twist coefficient (K ₁ ) = 8,995) was obtained.

(Example 7)
In Example 1, the polyurethane elastic yarn was drafted 1.9 times.

(Example 8)
In Example 1, the polyurethane elastic yarn was drafted 4.2 times.

Example 9
Using the composite yarn of Example 1, a circular knitted fabric with a tengu structure was knitted using a 10 gauge circular knitting machine. The basis weight was 460 g / m ² and the cutting force was 10.5 N.
The obtained circular knitted fabric was cut and sewn to produce trousers. Good fit and flexibility at the time of wearing were obtained, and a valuable cut-resistant dressing was obtained.

(Example 10)
Using the composite yarn of Example 1 for warp and weft yarns, weave knitted fabric. The warp yarn density was 64 yarns / inch, the weft yarn density was 50 yarns / inch, the basis weight was 450 g / m ² , and the cutting force was 9.5 N.
The obtained fabric was cut and sewn to produce a working jumper. Good fit and flexibility at the time of wearing were obtained, and a valuable cut-resistant dressing was obtained.

(Comparative Example 1)
In Example 1, as a core yarn made of polyurethane elastic yarn having a fineness of 117 dtex and a breaking elongation of 530% (manufactured by Toray Operontex Co., Ltd., trade name “Lycra” (registered trademark)) The obtained para-type aramid crimped yarn (twisting direction: S twist) was wound in a spiral shape, and the para-type aramid crimped yarn (twisting direction: Z) obtained in Example 1 was further used as the upper twisted yarn of the sheath yarn. Twist) was spirally wound in the opposite direction to the lower twisted yarn to obtain a double covering yarn (DCY) under the following processing conditions.

Spindle speed: 5,000 rpm
Draft of core yarn: Covering twist number T of twisted yarn under 3.0 times sheath yarn and twist direction thereof: 400 times / m, Covering twist number T of twisted yarn over S direction sheath yarn and twist direction thereof: 400 times / m , Z direction

One of the obtained coated yarns was supplied to a 10 gauge type glove knitting machine (Shimane Seiki Seisakusho Co., Ltd.), and a glove having a weight of 13.9 g / sheet and a palm weight of 360 g / m ² was knitted.

(Comparative Example 2)
Two para-aramid crimped yarns obtained in Example 1 (one each of S and Z twisted yarns) were not used as elastic yarns in the above-described manufacturing method, and only two aramid crimped yarns were rectified and entangled. To obtain a composite yarn. The overfeed of the feed roller 1 was 1.2%. The air jet pressure was 0.4 MPa.
In the obtained composite yarn, the aramid crimped yarn was present with the filaments scattered in an untwisted state.

One of the obtained composite yarns was supplied to a 10 gauge type glove knitting machine (Shimae Seiki Seisakusho Co., Ltd.), and a glove having a weight of 13.1 g / sheet and a palm weight of 282 g / m ² was knitted.

(Comparative Example 3)
In Example 1, the number of false twists t was 650 times / m, and the spindle rotation speed was 39,000 rpm. A para-aramid crimped yarn having a strength retention of 45% (twist coefficient (K ₁ ) = 4,331) was obtained.

(Comparative Example 4)
In Example 1, the number of false twists t was 1,400 times / m and the spindle rotation speed was 84,000 rpm. Para-aramid crimped yarn having a strength retention of 38% (twist coefficient (K ₁ ) = 9,329) was obtained.
The obtained composite yarn had talmi on the yarn surface under a load of 0.08826 cN / dtex. The surface quality of the knitted fabric was slightly poor due to the trapping of the tarmi at the yarn feeder of the knitting machine when the gloves were knitted and the sagging of the tarmi.

(Comparative Example 5)
In Example 1, in the process of producing a composite yarn, two Z twisted yarns were used as para-aramid crimped yarns instead of one S and Z twisted yarn.
In the obtained composite yarn, the aramid crimped yarn was untwisted but converged.
The obtained gloves were skewed and were not evaluated because they had no commercial value.

(Comparative Example 6)
In Example 1, a composite yarn was produced without performing continuous false twisting.
The obtained composite yarn was not evaluated because the surface of the yarn under the load of 0.0008826 cN / dtex was too large and the surface quality of the gloves was very poor.

  Tables 1 and 2 show the results obtained by evaluating the gloves obtained in Examples and Comparative Examples by the above-described methods.

  From Table 1, the glove (Example 1) composed of the composite yarn of the present invention has a significantly improved cutting force as compared with the glove (Comparative Example 1) made of the coated yarn, and thus obtained conventionally. I was able to obtain a glove with high cutting power that was not there. In addition, the hand tightening condition (stretching condition) was good, it was excellent in flexibility and easy to grip, and the texture (feel) and surface quality were good. The composite yarn not entangled with the elastic yarn (Comparative Example 2) had good flexibility, texture, and surface quality, but had a poor glove fit.

  Constructed from composite yarns using aramid crimped yarns with a filament yarn expansion / contraction restoration rate in the range of 5% ≦ E (A) ≦ 20%, 5% ≦ E (B) ≦ 20% (expansion and expansion rate is 100%) The gloves to be used (Examples 1, 5, and 6) have good fit and texture. On the other hand, a composite yarn (stretch elongation rate) using an aramid crimped yarn whose expansion / contraction restoration rate of the filament yarn is outside the range of 5% ≦ E (A) ≦ 20%, 5% ≦ E (B) ≦ 20% Is 100%), gloves (Comparative Examples 3 and 4) have poor texture and surface quality.

  In addition, gloves (Examples 1, 3, and 4) composed of composite yarns (E (A) = 15.6%, E (B) = 15.1%) with a stretch elongation rate in the range of 50% to 200% are fit. A glove (Examples 7 and 8) composed of a composite yarn having a good feeling and a stretch / elongation rate out of the above range has a poor fit.

  The woven or knitted fabric of the present invention is useful as protective clothing, reinforcing materials, reinforcing fabrics, and the like.

YA Aramid multifilament yarn A component
YB Aramid multifilament yarn B component
YC Elastic yarn 1 Feed roller 2 Feed roller 3 Blend nozzle 4 Delivery roller 5 Winding roller 6 Package 7 Feeding roller

Claims (9)

It is composed of at least an aramid multifilament yarn A component, an aramid multifilament yarn B component, and an elastic yarn, and has no loop and / or talmi on the yarn surface under a load of 0.08826 cN / dtex, and a load of 0.0008826 cN / dtex Below, the yarn surface has tarmi, and the expansion / contraction recovery rate E (A) of the aramid multifilament yarn A component and the expansion / contraction recovery rate E (B) of the aramid multifilament yarn B component satisfy the following expressions: Composite yarn to do.
5% ≦ E (A) ≦ 20%, 5% ≦ E (B) ≦ 20% 2. The composite yarn according to claim 1, wherein the stretch rate of the composite yarn is 50% or more and 200% or less. The composite yarn according to claim 1 or 2, wherein the aramid multifilament yarn A component and the aramid multifilament yarn B component are torque yarns, and the torques are opposite to each other. The composite yarn according to any one of claims 1 to 3, wherein the aramid multifilament yarn A component and the aramid multifilament yarn B component are non-twisted. The composite yarn according to claim 1, wherein the composite yarn is a non-torque yarn. The composite yarn according to claim 1, wherein the elastic yarn is a polyurethane elastic yarn. A woven or knitted fabric comprising the composite yarn according to any one of claims 1 to 6. A protective garment comprising the woven or knitted fabric according to claim 7. The protective clothing according to claim 8, wherein the protective clothing is a glove.

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