JP7592041B2 - Warp knitted fabric for clothing - Google Patents

Description

The present invention relates to a cellulose-blended warp knit fabric that has excellent moisture absorption, is lightweight, has moderate stretchability, and is opaque and shape stable.

For work clothes and sportswear, highly elastic knit fabrics are used so that they can move with the wearer. For dress shirts, work clothes, lab coats, etc., it is preferred to mix in cellulose fibers such as cotton for comfort.

However, woven and knitted fabrics containing cellulose fibers have low stretchability, and in order to obtain high stretchability and stretch-back properties, core spun yarns or covering yarns with spandex in the core or spandex interknitted are often used. For example, Patent Document 1 proposes a knitted fabric in which yarns made of cellulose long fibers are used as ground yarns, yarns made of hydrophobic fibers are used as surface yarns, and yarns made of elastic yarns, hydrophobic fibers, plant fibers, or functional fibers are used as inlay yarns, and these surface yarns and ground yarns are plated together.

However, when polyurethane-based elastic fibers with high stretchability are mixed in, there is a problem in that the knitted fabric is easily deteriorated due to deterioration over time, such as photoyellowing and hydrolysis of the polyurethane, making it difficult to use in applications such as dress blouses, work clothes, and lab coats, which are often used while being washed repeatedly. In addition, woven and knitted fabrics containing cellulose fibers are difficult to remove wrinkles when washed, making ironing necessary.

To solve the above problems, Patent Document 2 proposes a warp knitted fabric using a side-by-side or eccentric sheath-core type composite polyester fiber, one of which is mainly composed of polyethylene terephthalate and the other of which is mainly composed of polytrimethylene terephthalate. Patent Document 3 also proposes a warp knitted fabric in which the back and front yarns are polyester fibers, and the middle yarns are made of polyester fibers composed of two or more types of polymers and conductive fibers to form an insertion knit.

The knitted fabrics in Patent Documents 2 and 3 do not use polyurethane elastic fibers, so they are cost-effective warp knitted fabrics with stretchability and excellent washing durability. However, because they are made only of polyester fibers, they have poor moisture absorption properties, tend to become stuffy during work, and are less comfortable to wear as work clothes.

JP 2019-199678 A JP 2004-44069 A JP 2022-11744 A

The present invention was devised to overcome the problems of the conventional technology described above, and the technical objective of the present invention is to provide a warp knitted fabric for clothing that has the appropriate moisture absorption and stretchability required for uniform applications, while also having excellent shape retention, washing durability, and a good appearance quality.

After extensive research to solve the above problems, the inventors discovered that the above problems could be solved by selecting the appropriate type of yarn and knitting structure for warp knitted fabrics woven with three or more reeds, and producing warp knitted fabrics that satisfy the conditions for the characteristic values of basis weight, moisture content, weft stretch rate, and anti-see-through properties, and thus completed the present invention.

That is, the present invention relates to the following (1) to (7).
(1) A warp knitted fabric for clothing knitted with three or more reeds including a front reed, a middle reed, and a back reed, the front reed and the back reed using yarn made of polyester fiber containing 0.8 to 3.5% by mass of white metal oxide, the middle reed using a twisted yarn of a spun yarn containing cellulose fiber and a polyester highly crimped yarn having a stretching elongation rate of 20% to 80% after hot water treatment at 90°C, the middle reed knitting an insertion weave, and the warp knitted fabric for clothing characterized in that it satisfies all of the following conditions (i) to (iv):
(i) The basis weight is 90 to 230 g/ ^m2 ;
(ii) In an environment of 20°C and 85% RH, the moisture regain of the knitted fabric is 1.0 to 7.0% according to JIS-L1096:2010 8.10;
(iii) The elongation rate in the weft direction measured by the elongation rate method B (load 14.7 N) of JIS-L1096 is 25 to 65%;
(iv) The anti-see-through property according to JIS-L1923:2017B method is 85 to 98%.
(2) The warp knitted fabric for clothing according to (1), characterized in that a yarn obtained by twisting together a spun yarn containing cotton and having a British cotton count of 40 to 120 and the polyester highly crimped yarn having no interlace entanglement and a total fineness of 33 to 90 decitex with a twist number of 10 to 300 T/m is used for a middle reed.
(3) The warp knitted fabric for clothing according to (1) or (2), characterized in that the front and back reeds are of a single-needle or double-needle structure, and the underlap directions of the front and back reeds are opposite to each other.
(4) A warp knitted fabric for clothing according to any one of (1) to (3), characterized in that the middle reed has an insertion structure with one or two needles.
(5) A warp knitted fabric for clothing according to any one of (1) to (4), characterized in that the wash and wear property after 10 washings and tumble drying according to the JIS-L1096-C4M method is 3.0 or higher.
(6) The warp knitted fabric for clothing according to any one of (1) to (5), characterized in that the frictional charging voltage on the back surface measured according to JIS-L1094:2014 7.2B method is 0 to 2500 V after 10 washes according to JIS-L1096-C4M method.
(7) A garment made of the warp knitted fabric for clothing according to any one of (1) to (6), the garment being selected from the group consisting of a blouse, a dress shirt, a uniform shirt, a white coat, uniform pants, and a uniform jacket.

The warp knitted fabric for clothing of the present invention has excellent stretchability and moisture absorption properties, making it comfortable to wear, while also having a beautiful appearance and excellent shape retention and washing durability, making it suitable for use in clothing that is washed frequently, such as uniforms.

FIG. 1 is an example of a knitting structure diagram showing one embodiment of the knitting structure of a back reed, a front reed and a middle reed of the warp knitted fabric of the present invention. FIG. 2 is a knitting structure diagram showing one embodiment of the knitting structure of the back reed, front reed and middle reed of the warp knitted fabric of the embodiment. FIG. 3 is a woven fabric diagram showing the plain weave of Comparative Example 3.

The warp knitted fabric for clothing of the present invention will be described in detail below.
The warp knitted fabric for clothing of the present invention is a warp knitted fabric knitted with three or more reeds including a front reed, a middle reed, and a back reed, in which yarn made of polyester fiber is used for the front reed and the back reed, and a twisted yarn of a spun yarn containing cellulose fiber and a polyester highly crimped yarn is used for the middle reed, and the middle reed is a warp knitted fabric formed by knitting an insertion weave.

First, we will explain the twisted yarn of spun yarn containing cellulose fiber and highly crimped polyester yarn used in the middle reed constituting the warp knitted fabric for clothing of the present invention. Spun yarn containing cellulose fiber has the effect of improving comfort when worn by preventing stuffiness due to the moisture absorption of cellulose, and the presence of cellulose fiber on the back side improves the feel against the skin. Cellulose fiber is a fiber with a polymer structure of a cellulose skeleton, and examples of such fibers include natural cellulose fibers such as cotton and hemp, regenerated cellulose (including solvent-spun cellulose) such as lyocell, viscose rayon, polynosic, and high wet modulus, and semi-synthetic fibers such as cuprammonium rayon, diacetate, and triacetate. Of these, cotton is particularly preferred.

The spun yarn is made of cellulose fibers alone or is a spun yarn mainly made of cellulose fibers. Other fibers can be used in combination as long as the moisture absorption of the knitted fabric is not impaired. Here, the range in which the moisture absorption of the knitted fabric is not impaired is a range in which the moisture content of the knitted fabric does not fall below 1% in an environment of 20°C and 85% RH (relative humidity), and fibers other than cellulose fibers can be mixed in this range. Specifically, the blending ratio of cellulose fibers in the spun yarn is preferably 50 to 100% by mass, more preferably 60 to 100% by mass, and even more preferably 80 to 100% by mass. If the blending ratio of cellulose fibers is less than the above range, the moisture absorption of the entire knitted fabric decreases, making it difficult to obtain comfortable wear. In addition, from the viewpoint of moisture absorption and texture, the blending ratio of cellulose fibers in the entire knitted fabric is preferably 3 to 30% by mass, more preferably 5 to 25% by mass.

The total fineness of the spun yarn is preferably 40 to 120 English count, more preferably 50 to 100 English count, and even more preferably 55 to 85 English count. If the count is less than this range, the yarn will be too thick, and the knitted fabric made from this spun yarn will be heavy, making it difficult to obtain a thin and light knitted fabric. If the count exceeds this range, the blend ratio of cellulose fibers in the knitted fabric will decrease, and wearing comfort will tend to decrease.

When the cellulose fiber is cotton, the effective fiber length of the spun yarn is preferably 30 to 45 mm. More preferably, it is 37 to 43 mm. The effective fiber length of the spun yarn can be adjusted by using extra-long staple cotton such as Supima cotton, GIZA45, GIZA92, GIZA96, Supima cotton, Xinjiang cotton, and Sea Island cotton, which have a fiber length of 35 mm or more, or by blending extra-long staple cotton with medium-strength cotton such as Upland cotton and Australian cotton. If the effective fiber length is less than the above range, the surface fuzz of the spun yarn increases, and the fiber fuzz is likely to appear on the surface of the knitted fabric after repeated washing. Furthermore, when the cellulose is regenerated cellulose, the cut length of the fiber is preferably 30 to 55 mm. More preferably, the cut length is 35 to 48 mm. If it is within this range, it is easy to produce the spun yarn using general cotton spinning equipment.

Methods for spinning spun yarn include various methods such as ring spinning, open-end spinning, and knot spinning (e.g., Murata Vortex Spinner). Among these, ring spinning is preferred because it is easy to produce fine spun yarn and it has a good texture. Combed yarn is more preferred. In addition, before spinning the spun yarn by the various methods mentioned above, various treatments such as blending, carding, combing, drawing, and roving can be performed by general methods. When using the above cellulose fibers, the process first involves opening up the fiber mass of the raw cellulose fiber cotton and removing large impurities from the raw cotton in the carding process, separating the fibers into individual strands, removing impurities and short fibers contained therein, and gathering the remaining long fibers as parallel as possible to form a string (carded sliver), then the carding process, in which the short fibers are thoroughly removed and the remaining long fibers are gathered and gathered into a string (combed sliver), and the drawing process, in which the combed sliver is stretched to straighten the fibers and eliminate unevenness in thickness in the length direction to form a string (drawn sliver), and the resulting drawn sliver is twisted to prevent the fibers from slipping off each other and wound onto a bobbin to form a roving yarn. When using fibers other than cellulose fibers, it is desirable to add them in the carding process, drawing process, etc. The resulting roving yarn is spun in a spinning machine to finally produce spun yarn (combed yarn).

The twist coefficient of the spun yarn is preferably 2.8 to 5.0. More preferably, it is 3.0 to 4.5. When the twist coefficient is in the above range, it is possible to produce a yarn that has a soft texture, relatively little fuzz, and high strength. When the twist coefficient is below the above range, the strength of the yarn is low, which may reduce the productivity of the knitted or woven fabric, or the knitted or woven fabric strength may not be suitable for the intended use. When the twist coefficient exceeds the above range, the knitted or woven fabric may tend to have a hard texture, and there is a concern that the knitting properties of the knitted fabric may be reduced. The twist coefficient K is calculated from the number of twists obtained according to JIS-L1095-9.15.1 Method A based on the following formula.
Twist coefficient K = [T] / [NE] ^1/2
In the above formula, [T] is the number of twists (twists/2.54 cm), and [NE] is the English cotton count.

In the present invention, the polyester highly crimped yarn to be twisted with the cellulose spun yarn is a polyester-based long fiber, and is a highly crimped yarn having a stretching extension rate of 20 to 80% after hot water treatment at 90°C. If the stretching extension rate is less than the lower limit of the above range, it is not possible to impart sufficient elasticity to the twisted yarn with the cellulose spun yarn, which has low elongation. The lower limit of the stretching extension rate is preferably 25% or more, more preferably 30% or more. On the other hand, if the stretching extension rate exceeds the upper limit of the above range, poor quality and reduced productivity will occur. The upper limit of the stretching extension rate is preferably 75% or less, more preferably 70% or less. The stretching extension rate can be measured based on JIS-L1013:2010 8.11 Elasticity A method. The stretching extension rate of the polyester highly crimped yarn is preferably 10% or more greater than the stretching extension rate of the polyester fiber used in the front yarn and the back yarn, and more preferably 15% or more greater. The stretch recovery rate of the highly crimped polyester yarn is 30 to 65%, and more preferably 35 to 60%. If the stretch recovery rate is below the above range, the kickback property of the yarn ply and twisted with cellulose spun yarn is likely to deteriorate. If it exceeds the above range, the yarn quality, such as fluff, is likely to deteriorate. The stretch extension rate of the highly crimped polyester yarn in the warp knitted fabric for clothing of the present invention is preferably 15 to 55%, and more preferably 20 to 50%.

Highly crimped polyester yarn is made by subjecting polyester filaments to high crimping. The preferred crimping method is false twisting. Examples of false twisting methods include spindle false twisting, friction disk false twisting, and belt false twisting. To achieve high crimping, it is preferable to use spindle false twisting, which can be processed at low speed, or low-speed friction disk false twisting.

For example, when high shrink processing is performed by the spindle false twist method, polyester highly crimped yarn is produced as follows. A polyester highly oriented stretched yarn or intermediately oriented yarn is set in a one-stage or two-stage false twist processing machine equipped with a twisting heater and an untwisting heater, and a predetermined draw ratio determined by the spinning speed is set. A one-stage false twist yarn is obtained by false twist processing at a heater temperature of 180°C to 220°C, a false twist number of 2800 to 10,000 T/M, and a yarn speed of 80 to 250 m/min. To obtain a highly crimped yarn, the false twist number, heater temperature, and yarn speed must be high enough to avoid problems such as undissolved flame, fluff, and yarn breakage during production. The preferred false twist number is 3000 to 5500 T/m, and more preferably 3500 to 4500 T/m. The heater temperature is 180°C to 230°C, and more preferably 190 to 210°C. If the number of false twists and the heater temperature are lower than these, a highly crimped false twisted yarn cannot be obtained, and if the conditions are higher, yarn breakage and incomplete deflagration occur, resulting in extremely poor operability. Also, while a deflagration heater can be used to improve knitting performance, it is better not to use a deflagration heater or to limit the treatment to a low temperature of 170°C or less in order to maintain high crimp.

In the case of friction disk false twisting, it is preferable to process the yarn under similar conditions by slowing the yarn speed to the same as spindle false twisting. The number of false twists in the case of friction disk false twisting can be adjusted by selecting the disk configuration of the twisting body, adjusting the ratio of the disk peripheral speed to the yarn speed (so-called D/Y), and adjusting the draw ratio. Depending on the type and amount of oil applied to the highly oriented undrawn yarn, it is sufficient to adjust appropriately while checking the crimp state of the finished yarn at a yarn speed of 250 to 700 m/min and D/Y: 1.5 to 2.3 times. The twist tension is 0.15 to 0.5 g/processed yarn fineness dtex, and when using intermediate oriented yarn, it is good to appropriately take a draw ratio of 1.3 to 1.8 times. If the twist tension and untwist tension are almost equal, a nearly desirable number of false twists can be obtained. The number of false twists can be checked by grabbing the running yarn in the twisting zone, untwisting it with a twist detector, and calculating the number of false twists per meter based on the untwisted length. The direction of the false twist can be either the S direction or the Z direction, but it is preferable to match the direction of the false twist yarn with the direction of the cellulose spun yarn.

It is preferable that polyester highly crimped yarn does not include any interlacing. If it does include interlacing, it is best to keep the degree of interlacing to 50 pieces/m or less. If there is no interlacing, the highly crimped yarn can maintain a high stretch and elongation rate. It also provides better coverage for the spun yarn, and has the effect of suppressing the cotton yarn from protruding from the back side and fuzzing.

The polyester highly crimped yarn is preferably made of homopolymers or blend polymers such as polyethylene terephthalate, polybutylene terephthalate, and polytetramethylene terephthalate, or copolymers mainly made of these. For example, polybutylene terephthalate fibers have a larger bending of the molecular chain than polyethylene terephthalate fibers, which results in excellent elastic properties and flexibility. Therefore, false-twisted yarns made of polybutylene terephthalate fibers are preferred because they have high crimpability. In addition to polybutylene terephthalate fibers, false-twisted yarns made of conjugate fibers of polybutylene terephthalate and polyethylene terephthalate are also preferred. In this conjugate fiber, latent crimping occurs due to the uneven distribution of polybutylene terephthalate in the cross section of the fiber, and the conjugate fiber has crimping properties equal to or higher than that of false-twisted yarns made of polybutylene terephthalate fibers alone. Here, the conjugate fiber of polybutylene terephthalate and polyethylene terephthalate is a composite fiber having a cross section such as a side-by-side structure using both components or an eccentric core-sheath structure. In this case, the cross section may be a known cross section such as a round cross section, a triangular cross section, a hollow cross section, etc. In addition, the filament crimped yarn may contain, as necessary, a matting agent such as titanium oxide, a stabilizer such as phosphoric acid, an ultraviolet absorber such as a hydroxybenzophenone derivative, a crystallization nucleating agent such as talc, a lubricant such as aerosil, an antioxidant such as a hindered phenol derivative, and other flame retardants, antistatic agents, pigments, fluorescent whitening agents, infrared absorbing agents, defoamers, etc.

The total fineness of the highly crimped polyester yarn is not particularly limited, but is preferably 15 to 120 dtex. If the fineness of the elastic fiber is within this range, the effect of preventing the cotton yarn from protruding and the effect of increasing stretchability are improved. On the other hand, if it is lower than 15 dtex, it is difficult to obtain sufficient stretchability. Also, if it is higher than 120 dtex, the cellulose blend ratio decreases and wearing comfort is likely to decrease. Also, the single fiber fineness of the highly crimped polyester yarn is preferably 0.5 to 3.5 dtex.

When highly crimped polyester yarn and spun cellulose yarn are twisted together, the twisting direction is preferably opposite to the false twisting direction of the highly crimped yarn. More preferably, the twisting direction of the spun cellulose yarn and the false twisting direction of the highly crimped false twisted yarn are the same, and the twisting direction is opposite to that of the false twisting direction of the spun cellulose yarn and the highly crimped false twisted yarn. False twisted yarn has a crimped form that is fixed in a false twist state in an almost untwisted state, but by twisting, a twist in the opposite direction to the false twisted crimped form of the filament crimped yarn is added, so that a repulsive action of the crimp occurs between the filament single yarns, making it easier for the filament to cover the spun yarn. This has the effect of making it difficult for the spun yarn to protrude to the back side when the knitted fabric is shrunk during dyeing processing. It also improves stretchability and abrasion resistance. The number of twists in the twisting is preferably 20 to 600 T/m, more preferably 25 to 300 T/m. If the number of twists is less than the above range, there is a concern that the cotton yarn may easily protrude into the backing cotton. If it is more than the above range, the binding force of the highly crimped yarn becomes too strong, and the stretchability of the knitted fabric is likely to decrease.

The warp knitted fabric for clothing of the present invention uses cellulose fibers in the middle reed that knits the insertion structure, which makes it difficult for the cellulose fibers to be exposed on the surface of the knitted fabric, resulting in a good appearance and improved wear resistance. As the insertion method, 00/11//, 00/22//, 00/33//, or their reversed structures are preferred. More preferably, 00/11//, 11/00//, or their reversed structures are used, and further, the yarn used in the middle reed is reversed to the yarn used in the front reed. This can prevent the cotton yarn from protruding to the back surface. In addition, the yarn used in the middle reed may be arranged in a full set in the middle reed, but since the purpose is to achieve a thin and lightweight fabric, it is easier to keep the basis weight within the range specified in the present invention by using 1 in 1 out or 1 in 2 out, etc.

The warp knitted fabric of the present invention has excellent antistatic properties because it contains cellulose fibers with a high moisture content, but antistatic yarns may be used to further enhance the antistatic function. When using antistatic yarns, it is preferable to twist the antistatic yarn with the yarn used for the middle reed. In the present invention, a composite yarn made by twisting a spun yarn containing cellulose fibers and a polyester highly crimped yarn is used for the middle reed, so this composite yarn may be further twisted with an antistatic yarn, but it is preferable from a cost perspective to twist the antistatic yarn at the same time as twisting the spun yarn containing cellulose fibers and the polyester highly crimped yarn. In addition, in order to impart sufficient antistatic performance to the warp knitted fabric of the present invention, it is preferable to arrange the yarn containing the antistatic yarn at a rate of 1 thread/inch or more in the wale direction. The antistatic yarn is preferably one in which conductive fine particles are kneaded into the fiber, but specifically, it may be either a conductive fiber (single component system) formed of a conductive material kneaded into a fiber-forming resin such as polyester resin or polyamide resin (conductive resin), or a conductive fiber (composite component system) formed of a conductive resin and a non-conductive resin. Examples of conductive materials include conductive carbon black; simple metals such as silver, nickel, copper, iron, and tin; and metal compounds such as copper sulfide, zinc sulfide, and copper iodide. In order to achieve excellent antistatic performance both initially and after washing, the electrical resistance value of the conductive yarn is preferably 100 to 1000 Ω/cm. Examples of conductive yarns that can be used include "Cracarbo" manufactured by Kuraray Trading Co., Ltd., "Belltron" manufactured by KB Seiren Co., Ltd., "Luana" manufactured by Toray Industries, Inc., and "Emina White" manufactured by Toyobo Co., Ltd.

Next, we will explain the yarn made of polyester fiber used in the front and back reeds constituting the warp knitted fabric for clothing of the present invention. As the yarn made of polyester fiber, yarn made of polyester fiber such as polyethylene terephthalate fiber, polybutylene terephthalate fiber, polytrimethylene terephthalate fiber, polylactic acid fiber, etc. can be used. The form of the yarn may be either filament yarn or spun yarn, but filament yarn is preferred. By using filament yarn, the flexibility and shape stability of the knitted fabric can be further improved. For the filament yarn, flat yarn (raw silk), false twisted yarn, air intertwined yarn, etc. can be used. In terms of abrasion resistance, moderate stretchability, and washing durability, false twisted yarn is preferred. This false twisted yarn may be the same high crimp yarn as the yarn used in the middle reed, but it may also be a false twisted yarn with a normal stretching and elongation rate. The stretching and elongation rate of this false twisted yarn is preferably 5% to 40%, and more preferably 8% to 30%. If the stretching extension rate is below the lower limit of the above range, the effect of covering the stitches by the false twist yarn is not fully exerted and it is difficult to obtain anti-see-through properties, and if it exceeds the upper limit, not only is it difficult to prevent the cellulose fibers from protruding, but the entire knitted fabric is likely to shrink significantly during dyeing and become heavy. The stretching extension rate can be measured based on JIS-L1013:2010 8.11 Elasticity Method A. Methods of false twisting include spindle false twisting, friction disk false twisting, and belt false twisting.

The fineness of the false twisted yarn is preferably 30 to 180 dtex, more preferably 50 to 110 dtex. Yarns of different fineness within the above range may be interwoven. If the fiber fineness of the yarn used is finer than the above range, the knitted fabric tends to have a strong sense of transparency. If it is thicker than the above range, the knitted fabric tends to be thick and bulky. In particular, it is preferable to use false twisted yarn with a single fiber fineness of 0.8 to 3.5 dtex and a total fineness of 30 to 110 dtex.

White metal oxides such as titanium oxide are added to the polyester fibers used for the front and back reeds to prevent see-through. The amount added is in the range of 0.8 to 3.5% by mass. Preferably, it is 1.0 to 3.0% by mass, and more preferably, it is 1.3 to 2.8% by mass. For lab coats, office blouses, dress shirts, gym clothes, etc., which are often made of white or light colors, if the amount added is less than the above range, the see-through feeling is likely to be strong, and if the amount added is more than the above range, the spinning properties will be extremely poor and the yarn quality, such as fluff, will also be likely to deteriorate. In addition, the polyester fibers may contain, as necessary, matting agents, stabilizers such as phosphoric acid, ultraviolet absorbers such as hydroxybenzophenone derivatives, crystallization nucleating agents such as talc, lubricants such as aerosil, antioxidants such as hindered phenol derivatives, and other flame retardants, antistatic agents, pigments, fluorescent whitening agents, infrared absorbers, defoamers, etc.

The warp knitted fabric for clothing of the present invention must have a basis weight of 90 to 230 g/ ^m2 . It is preferably 100 to 200 g/ ^m2 , and more preferably 100 to 180 g/ ^m2 . If the basis weight is less than the above range, it tends to be too see-through and difficult to use for applications such as white coats and office shirts. If it exceeds the above range, it becomes too heavy and comfort is likely to decrease. The warp knitted fabric for clothing of the present invention preferably has a thickness of 0.3 to 1.2 mm, and more preferably 0.5 to 1.0 mm. If the thickness exceeds the above range, it becomes too thick and its suitability for applications such as uniform shirts and white coats is likely to decrease. If it is less than the above range, it is difficult to obtain anti-see-through properties.

Next, the warp knitted fabric for clothing of the present invention having the above-mentioned configuration and characteristic values is preferably configured as described below. The warp knitted fabric for clothing of the present invention is knitted by a warp knitting machine such as a tricot machine. The needle density of the machine is preferably 22 to 32 gauge/inch, more preferably 28 to 32 gauge/inch. If the needle density does not satisfy the above range, the fabric will be highly see-through or too thick, making it difficult to use for thin uniforms.

The warp knitted fabric for clothing of the present invention is knitted with at least three reeds, a front reed, a middle reed, and a back reed. The front reed and the back reed are preferably made of a single-needle or double-needle structure. From the viewpoint of the strength and durability of the knitted fabric, it is preferable to use the knit loops mainly as closed loops. It is particularly preferable that all the knit loops are closed loops. For example, it is preferable that either the front reed or the back reed is a closed loop denby, and the other is a closed loop plain cord. It is also preferable that the underlap directions of the front reed and the back reed are reversed. By reversing the directions, the knit loops on the surface face the wale direction, so that the loop shape is regular and stable, and the surface is clean and the fluff of the spun yarn can be prevented from coming to the surface. In addition, the transparency is reduced and durability against abrasion is improved.

In the present invention, the middle reed is used to combine an insertion structure as an intermediate layer with the warp knitted fabric of the front reed and back reed as described above. An insertion structure is a structure that does not have loops. Since it does not have loops, the cellulose fibers do not appear on the surface, and the fabric surface on the front side looks beautiful. It is preferable that the middle reed is an insertion structure with one needle or two needles.

Figure 1 shows an example of a knitting structure diagram showing one embodiment of the knitting structure of the back reed, front reed, and middle reed of the warp knitted fabric of the present invention. In Figure 1, the front reed shows a knitted structure of 1-2/1-0//. The middle reed shows a knitted structure of 0-0/1-1//. The back reed shows a knitted structure of 1-0/2-3. Although not shown in the figure, the yarn arrangement in the middle reed is 1 in 1 out.

In other words, in FIG. 1, the middle reed knits the insertion structure, and the front and back reeds knit the knit structure. The insertion structure formed by the middle reed forms a loop structure in which the yarn used for the front reed and the yarn used for the back reed overlap each other in the knit loop, and the structure is maintained by knitting so that the yarn used for the front reed and the yarn used for the back reed sandwich the yarn used for the middle reed. In this way, by forming loops in which the yarn used for the front reed and the yarn used for the back reed overlap each other in all knit loops that make up the knitted fabric, the yarn used for the front reed and the yarn used for the back reed firmly sandwich the yarn used for the middle reed, so the elasticity of the yarn used for the middle reed contributes greatly to the elasticity of the knitted fabric.

When obtaining the warp knitted fabric for clothing of the present invention, it is preferable to refine and dry the grey fabric knitted in the above-mentioned structure to remove excess oil and impurities, and to pre-set it at 170 to 190°C to stabilize the shape. Furthermore, depending on the application, fluorescent bleaching and dyeing are performed using a conventional polyester dyeing method, and the knitted fabric is shrunk and exhibits elasticity by being dyed at high temperature while being softened. Thereafter, in the finishing and final setting, it is preferable to perform finishing under conditions in which the course and wale density after finishing does not decrease by 3% or more from the wale density after dyeing. In the warp knitted fabric produced as described above, the stretching and elongation rate of the highly crimped yarn in the middle yarn is preferably 20 to 80%. If the stretching and elongation rate of the highly crimped yarn is within this range, the weft direction elongation rate of the knitted fabric (elongation rate method B of JIS-L1096 (load 14.7N)) can be set to 25 to 65%.

The warp knitted fabric of the present invention has a moisture content of 1.0 to 7.0% in an environment of 20°C and 85% RH, and is hygroscopic, so that it can regulate the humidity inside the garment to a comfortable range even during high activity work when the humidity inside the garment is likely to become high due to insensible perspiration. If the moisture content is less than 1.0%, the hygroscopicity is low and the humidity regulation function inside the garment is likely to decrease, and if it exceeds 7.0%, fuzz will appear on the surface appearance and the appearance of the dyed item will be prone to flickering.

The warp knitted fabric of the present invention has a suitable stretchability, while using spun yarns of cellulose fibers with low extensibility, without causing the spun cellulose yarns to protrude or cellulose fluff to appear on the surface. Specifically, the extensibility in the weft direction of the warp knitted fabric of the present invention can be achieved as measured by JIS-L1096B method (load 14.7N) of 25 to 65%, preferably 30 to 65%, and more preferably 35 to 65%. It is preferable that the extensibility in the warp direction is smaller than that in the weft direction, and if it is kept to about half of the weft direction, tailoring becomes easier. If the elongation rate exceeds the above range, the spun cellulose yarns will tend to protrude on the back surface and cellulose fluff will tend to appear on the surface.

The warp knitted fabric of the present invention has almost no cellulose fibers on the surface and has the beautiful appearance of polyester long fibers, making it suitable for clothing such as blouses, dress shirts, uniform shirts, lab coats, uniform pants, and uniform jackets. In addition, because there is no fluff from short cellulose fibers on the surface of the fabric, it can be used suitably in applications where dust is undesirable, such as in clean rooms and food industry uniforms.

The warp knitted fabric of the present invention contains cellulose fibers, but is resistant to wrinkling due to washing, and even after 10 washes according to the JIS-L1096-C4M method and tumble drying, the fabric has a wash-and-wear (W&W) property of 3.0 or higher, preferably 3.5 or higher, and more preferably 4.0 or higher. This is thought to be because the cellulose fibers do not form knitting loops in the knitted structure, so the wrinkle fixation of the cellulose fibers is less likely to appear in the knitted fabric.

The warp knitted fabric of the present invention can achieve a frictional charging voltage on the back surface measured according to JIS-L1094:2014 7.2B method of 2500 V or less, preferably 2000 V or less after 10 washes according to JIS-L1096-C4M method. As a result, when the warp knitted fabric of the present invention is made into clothing, static electricity generation while wearing the garment is suppressed, making it comfortable to wear.

The warp knitted fabric of the present invention has an optimized white metal oxide content in the polyester fibers used in the front and back reeds and an optimized basis weight of the knitted fabric, and therefore can achieve an anti-see-through rate of 87 to 98% according to JIS-L1923:2017B method.

The present invention will now be described in detail using examples and comparative examples, but the present invention is not limited to these examples. Modifications in these examples are within the technical scope of the present invention as long as they do not deviate from the spirit of the present invention. The measurement methods for the characteristic values used in the present invention are as follows.

<Stretchability>
The elasticity was measured according to JIS-L1013:2010 8.11 Elasticity Method A. The samples were pretreated in hot water at 90°C for 20 minutes.

<Stretch recovery rate>
The measurement was performed according to the method of JIS-L1013:2010 8.12. The sample was pretreated in hot water at 90°C for 20 minutes.

<Stretching and elongation rate of highly crimped yarn in knitted fabric>
The warp knitted fabric was carefully disassembled along the wale, 50 cm of the ply-twisted yarn was pulled out, and 10 highly crimped yarns were taken out by untwisting them. These were measured according to JIS-L1013:2010 8.11 Elasticity Method A. The arithmetic average of the measured values of the 10 yarns was taken as the elasticity extension rate of the highly crimped yarn in the knitted fabric.

<Effective fiber length of cotton fibers>
The fiber length was measured in accordance with JIS-L-1019:2006 7.2.1, Method A (double sorter method).

<Total fineness>
The apparent cotton count (English count) was measured according to the method of JIS-L1095:2010 9.4.2.

<Twist modulus>
The number of twists was measured according to JIS-L1095:2010 9.15.1 A method, and the twist coefficient (K) was calculated using the following formula.
Twist factor (K) = twists per inch (T) / √ count ('s)

<Intertwining Degree>
Measurement was performed according to JIS-L1013:2010 8.15.

<Thickness of knitted fabric>
Measurement was performed according to the test method of JIS-L 1096:2010 8.4 A method.

<Weight of knitted fabric>
Measurement was performed according to the test method of JIS-L 1096:2010 8.3.

<Elongation rate>
The weft elongation of the knitted fabric and woven fabric was measured by JIS-L 1096:2010 8.16.1 B method (constant load method) with a load of 14.7N.

<Moisture content>
The moisture regain of the knitted or woven fabric was measured according to JIS-L 1096:2010 8.10. The moisture regain was measured under environmental conditions of 20°C and 85% RH.

<Stuffiness>
Uniform shirts were made using the knitted or woven fabrics of the Examples and Comparative Examples on the front and back bodies, and worn by a male in his 20s. The sweatiness inside the garment was evaluated immediately after walking for 20 minutes at a speed of 800 m/min in an indoor environment of 30°C and 85% RH. If sweatiness was felt, it was rated as "X", if only a little sweatiness was felt, it was rated as "△", and if no sweatiness was felt and it was comfortable, it was rated as "O".

<Frictional charging voltage>
The knitted or woven fabric was washed 10 times according to the JIS-L1096-C4M method and then dried, and the measurement was performed according to JIS-L1094:2014 7.2B method (friction charging voltage measurement method). However, the friction surface was the technical back (front reed side).

<Anti-see-through property>
Evaluated according to JIS-L1923:2017 B method (instrument method).

<Surface appearance>
In the JIS-L1096-C4M method, in the central part of a knitted or woven fabric after 10 washes, if 20 or more cellulose fluff particles were visible on the surface of the fabric in any 2.54 cm x 2.54 cm area, it was rated as "X", if one or more fluff particles were observed, it was rated as "△", and if no fluff was observed, it was rated as "O".

<Shape retention>
The fabric was washed 10 times using the JIS-L1096-C4M method, and then tumble dried. The smoothness of the knitted or woven fabric's appearance after washing was evaluated according to JIS-L1924:2017 8.2 a). A replica of AATCC TM124 was used to rank the fabric from 1 to 5. Three test samples were graded, and the average value was used.

<Backside protrusion>
The back surface (sinker loop surface) of the finished knitted fabric was checked to see whether the yarn used for the middle reed was protruding in a loop shape on the back surface within an arbitrary 2.54 cm x 2.54 cm area, and if it was protruding, the state of protrusion was checked. If it was not protruding at all, it was rated as ◎; if it was slightly floating on the back surface but not protruding, it was rated as 〇; if it was protruding on the back surface but the protruding part was not felt to be uncomfortable on the skin, it was rated as △; if it was protruding on the back surface and felt uncomfortable against the skin, it was rated as ×, and the evaluation was made on a four-level scale of ◎, 〇, △, and ×. ◎ and 〇 were considered to be acceptable.

(Production of polyester highly crimped yarns a, b, c, and d)
Manufacture of polyester highly crimped yarn a
Polyethylene terephthalate polymer (intrinsic viscosity 0.63 m ³ /kg) containing 0.5% by weight of titanium oxide (white metal oxide) was melted at 295 ° C., polyester fiber was melt extruded from a spinneret device (36 holes) with a round cross section, and after cooling and solidifying, a spinning oil was applied and wound up to obtain a highly oriented undrawn yarn of 90 dtex and 36 filaments. Thereafter, a low-speed friction disk type friction false twisting machine was used with a 5 mm thick urethane disk with the number of disks set to 1-7-1, and false twisting was performed on the highly oriented undrawn yarn under the conditions of a draw ratio of 1.58, a yarn speed of 300 m / min, a D / Y ratio = 1.8, a heater surface temperature of 200 ° C., and a twisting direction Z, and the yarn was wound up without air entanglement treatment to obtain a highly crimped yarn a of 56 dtex and 36 filaments. The stretch extension rate of this highly crimped yarn a was 62.8%, and the stretch recovery rate was 51.3%. This highly crimped yarn a had a false twist number of 4150 T/m as measured on the machine, and had no problems with handling.

Manufacture of polyester highly crimped yarn b A drawn yarn of 84 decitex 36 filament polyethylene terephthalate filament with a round cross section and titanium oxide (white metal oxide) content of 0.5% by weight was prepared. The finished yarn was fed from a feed roller using a spindle false twisting machine (manufactured by Mitsubishi Heavy Industries), and false twisted at a processing speed of 100 m/min, a heater temperature of 200°C, a twisting direction Z, and a false twist number of 3900. The highly crimped yarn b was then wound up without interlacing. The stretching extension rate of this highly crimped yarn b was 46.9%, and the stretching recovery rate was 38.5%.

Preparation of polyester highly crimped yarn c A side-by-side type composite fiber of polybutylene terephthalate and polyethylene terephthalate (weight ratio 50/50) was prepared as a drawn yarn of 56 dtex 36 filament (elongation 30.5%). This drawn yarn was fed from a feed roller using a spindle false twisting machine (Mitsubishi Heavy Industries LS6) and false twisted in the twisting direction Z at a processing speed of 100 m/min, heater temperature of 190°C, and false twist number of 3800, and then wound up without interlacing to obtain highly crimped yarn c. The stretching elongation rate of this highly crimped yarn c was 65.4%, and the stretching recovery rate was 49.1%.

Manufacture of polyester highly crimped yarn d Polyethylene terephthalate polymer (intrinsic viscosity 0.63 m ³ /kg) containing 0.5% by weight of titanium oxide (white metal oxide) was melted at 295°C, and polyester fiber was melt-extruded from a spinneret device (36 holes) with a round cross section, and after cooling and solidifying, a spinning oil was applied and wound up to obtain a highly oriented undrawn yarn of 90 dtex and 36 filaments. Thereafter, a low-speed friction disk type friction false twisting machine was used with 5 mm thick urethane disks with the number of disks set to 1-7-1, and false twisting was performed on the highly oriented undrawn yarn under the conditions of a draw ratio of 1.58, a yarn speed of 300 m/min, a D/Y ratio of 1.8, a heater surface temperature of 200°C, and a twisting direction Z, and air entanglement was performed and wound up to obtain a highly crimped yarn d of 56 dtex and 36 filaments. The highly crimped yarn d had a stretch extension rate of 33.9% and a stretch recovery rate of 38.5%. The interlace number (degree of entanglement) of the highly crimped yarn d was 55 pieces/m, and the false twist number measured on the machine was 4150 T/m.

(Production of cellulose spun yarns a, b, c, and d)
Manufacturing of cellulose spun yarn a
American Supima cotton and GIZA92 cotton were mixed in a weight ratio of 50:50 and mixed using an OHARA cotton mixer, and then carded slivers were made using an Ishikawa Seisakusho carding machine. After being combed, the mixture was passed through a loom-made draw frame twice to make a 210 grain/6 yd sliver. It was then passed through a Toyota Automatic Looming Co., Ltd. roving frame to make a 80 grain/15 yd roving. The roving was then subjected to a draft of about 40 times using a ring spinning frame to make a 100% cotton spun yarn a (twist factor 3.5, Z twist, effective fiber length 38 mm) with a British cotton count of 60 (60/1).

Manufacturing of cellulose spun yarn b A roving yarn of 50 grains/15 yds was produced at the roving frame, and 80/1 spun yarn b (twist factor 3.8, Z twist, effective fiber length 38 mm) was produced in the same manner as spun yarn a, except that the draft was 32 times during fine spinning.

Production of cellulose spun yarn c: Ring spinning was carried out in the same manner as for spun yarn a, except that "Modal (registered trademark)" manufactured by Lenzing (1.0 dtex, cut length 39 mm) was used instead of Supima cotton and GIZA92 cotton, to produce spun yarn c (60/1 100% rayon) (twist coefficient 3.5, Z twist).

Preparation of cellulose spun yarn d: A combed sliver was prepared in the same manner as for spun yarn a, except that Australian cotton was used instead of Supima cotton and GIZA92 cotton, and a 300 grain/6 yd sliver was made by passing it through a drawing frame twice. A 125 grain/15 yd roving was produced at the roving frame, and a draft of 40 times was used for fine spinning to produce spun yarn d of English count 40/1 (twist factor 3.5, Z twist, effective fiber length 29 mm).

(Production of twisted yarns A, B, C, D, E, and F)
Manufacturing of twisted yarn A
The cellulose spun yarn a and the highly crimped yarn a were put into a plying and twisting machine and plyed at 100 T/m using an S twist to produce ply-twisted yarn A.

Manufacture of Paired Yarn B Paired yarn B was manufactured by plying highly crimped yarn b in place of highly crimped yarn a with cellulose spun yarn a using an S twist at 30 T/m.

Manufacture of Ply-Twisted Yarn C Cellulose spun yarn b was used in place of cellulose spun yarn a, and combined with highly crimped yarn a and ply-twisted with an S twist at 30 T/m to manufacture ply-twisted yarn C.

Production of Paired and Twisted Yarn D Cellulose spun yarn c and highly crimped yarn c were put on a twisting machine and twisted at 100 T/m with an S twist to produce a paired and twisted yarn D.

Manufacture of Paired Yarn E: Paired yarn E was manufactured by plying highly crimped yarn d in place of highly crimped yarn a with cellulose spun yarn a using an S twist at 100 T/m.

Manufacturing of Paired Yarn F When manufacturing the paired yarn A, the cellulose spun yarn a, the highly crimped yarn a, and an antistatic yarn (Beltron 22T6-B31 manufactured by Kuraray) were further twisted together in an S-twist at 100 T/m to manufacture the paired yarn F.

Example 1
Using a 28-gauge tricot knitting machine (KE type manufactured by Karl MAYER) with three reeds, knitting was carried out with the following yarns and the knitting structure shown in Figure 2 to obtain a warp-knitted fabric.
Front reed: Commercially available full-dull false twist yarn (friction disc 2 heater, titanium oxide (white metal oxide) content 1.5% by weight, round cross section, 84 dtex, 72 filaments, stretch elongation rate 10.1%, stretch recovery rate 28.5%) Structure: 1-2/1-0//
Middle reed: Double-twisted yarn A Structure: 0-0/1-1// (1 in 1 out)
Back reed: Commercially available full-dull false twist yarn (friction disk 2 heater, titanium oxide (white metal oxide) content 1.5% by weight, round cross section, 56 dtex, 36 filaments, stretch elongation rate 11.1%, stretch recovery rate 29.5%) Structure: 1-0/2-3//

Then, the obtained warp knitted fabric was passed through a pre-wetter as a normal tricot dyeing process, and then refined and dried to remove excess oil and impurities, and pre-set at 180°C in width in a tenter. Furthermore, using a high-pressure dyeing machine (Circular NS manufactured by Hisaka Senshokuki), it was high-pressure dyed at 130°C with fluorescent dye Hakkol STR (manufactured by Showa Chemical Industry Co., Ltd.) 1% owf), and then dehydrated and spread out, softener was added, and a final set was performed at 170°C in a tenter to finish. The density of the completed warp knitted fabric was 39 wales/inch and 62 courses/inch. Details of the knitted fabric configuration of the warp knitted fabric of Example 1 and the evaluation results of the knitted fabric physical properties are shown in Table 1.

Example 2
A warp knitted fabric was obtained in the same manner as in Example 1, except that the yarn usage was changed as follows. The density of the finished warp knitted fabric was 37 wales/inch and 61 courses/inch. Details of the knitted fabric configuration of the warp knitted fabric in Example 2 and the evaluation results of the knitted fabric properties are shown in Table 1.
Front reed: Commercially available full-dull false twist yarn (friction disc 2 heater, titanium oxide (white metal oxide) content 1.5% by weight, round cross section, 84 dtex, 72 filaments, stretch elongation rate 10.1%, stretch recovery rate 28.5%) Structure: 1-2/1-0//
Middle reed: Double-twisted yarn B Structure: 0-0/1-1// (1 in 1 out)
Back reed: Commercially available full-dull false twist yarn (friction disk 2 heater, titanium oxide (white metal oxide) content 1.5% by weight, round cross section, 84 dtex, 72 filaments, stretch elongation rate 10.1%, stretch recovery rate 28.5%) Structure: 1-0/2-3//

Example 3
A white warp knitted fabric was obtained in the same manner as in Example 1, except that the yarn usage was changed as follows. The density of the finished warp knitted fabric was 36 wales/inch and 60 courses/inch. Details of the knitted fabric configuration of the warp knitted fabric of Example 3 and the evaluation results of the knitted fabric properties are shown in Table 1.
Front reed: Commercially available full-dull false twist yarn (friction disc 2 heater, titanium oxide (white metal oxide) content 1.5% by weight, round cross section, 56 dtex, 36 filaments, stretch elongation rate 11.1%, stretch recovery rate 29.5%). Structure: 1-2/1-0//
Middle reed: Double-twisted yarn C Structure: 0-0/1-1// (1 in 1 out)
Back reed: Commercially available full-dull false twist yarn (friction disk 2 heater, titanium oxide (white metal oxide) content 1.5% by weight, round cross section, 56 dtex, 36 filaments, stretch elongation rate 11.1%, stretch recovery rate 29.5%) Structure: 1-0/2-3//

Example 4
A warp knitted fabric was obtained in the same manner as in Example 1, except that the yarn usage was changed as follows. The density of the finished warp knitted fabric was 42 wales/inch and 62 courses/inch. Details of the knitted fabric configuration of the warp knitted fabric of Example 4 and the evaluation results of the knitted fabric properties are shown in Table 1.
Front reed: Commercially available full-dull false twist yarn (friction disc 2 heater, titanium oxide (white metal oxide) content 1.5% by weight, round cross section, 56 dtex, 36 filaments, stretch elongation rate 11.1%, stretch recovery rate 29.5%) Structure: 1-0/2-3//
Middle reed: Double-twisted yarn A Structure: 0-0/1-1// (1 in 1 out)
Back reed: Commercially available full-dull false twist yarn (friction disk 2 heater, titanium oxide (white metal oxide) content 1.5% by weight, round cross section, 56 dtex, 36 filaments, stretch elongation rate 11.1%, stretch recovery rate 29.5%) Structure: 1-2/1-0//

Example 5
A warp knitted fabric was obtained in the same manner as in Example 1, except that the middle reed was changed from double-twisted yarn A to double-twisted yarn D. The density of the finished warp knitted fabric was 41 wales/inch and 61 courses/inch. Details of the knitted fabric configuration of the warp knitted fabric of Example 5 and the evaluation results of the knitted fabric properties are shown in Table 1.

Example 6
A warp knitted fabric was obtained in the same manner as in Example 1, except that the middle reed was changed from double-twisted yarn A to double-twisted yarn E. The density of the finished warp knitted fabric was 36 wales/inch and 60 courses/inch. Details of the knitted fabric configuration of the warp knitted fabric of Example 6 and the evaluation results of the knitted fabric properties are shown in Table 1.

Example 7
A warp knitted fabric was obtained in the same manner as in Example 1, except that the yarn usage for the middle reed was changed as follows. The density of the finished warp knitted fabric was 39 wales/inch and 62 courses/inch. Details of the knitted fabric configuration of the warp knitted fabric of Example 7 and the evaluation results of the knitted fabric physical properties are shown in Table 1.
Middle reed: Yarn usage: Ply-twisted yarn A: Ply-twisted yarn F = 11:1 Structure: 0-0/1-1// (1 in 1 out)

(Comparative Example 1)
A warp knitted fabric was obtained in the same manner as in Example 2, except that the middle reed was changed from doubled-twisted yarn a to cellulose spun yarn d. The density of the finished warp knitted fabric was 29/inch in wales and 58/inch in courses. Details of the knitted fabric configuration of the warp knitted fabric of Comparative Example 1 and the evaluation results of the knitted fabric properties are shown in Table 1.

(Comparative Example 2)
A warp knitted fabric was obtained in the same manner as in Example 2, except that the middle reed was changed from the double-twisted yarn a to the same commercially available full-dull false twist yarn (friction disc 2 heater, titanium oxide (white metal oxide) content 1.5% by weight, round cross section, 84 dtex, 72 filaments, stretch elongation rate 10.1%, stretch recovery rate 28.5%) as the front and back reeds. The density of the finished warp knitted fabric was 31 wales/inch and 60 courses/inch. Details of the knitted fabric configuration of the warp knitted fabric of Comparative Example 2 and the evaluation results of the knitted fabric properties are shown in Table 1.

(Comparative Example 3)
A commercially available full-dull false twisted yarn (friction disc 2 heater, titanium oxide (white metal oxide) 1.5% by weight content, round cross section, 84 dtex, 72 filaments, stretch elongation rate 10.1%, stretch recovery rate 28.5%) was used for the warp yarn, and a double-twisted yarn B was used for the weft yarn, and a plain weave with a warp density of 100/2.54 cm and a weft density of 68/2.54 cm was woven by a water jet loom manufactured by Tsudakoma Kogyo Co., Ltd. The fabric was scoured by a conventional method using a continuous scourer, cylinder dried, and then pre-set to the width using a tenter (190°C x 30 seconds), and dyed at high pressure at 130°C with a disperse dye (DIANIX Blue UN-SE 3% owf) using a high-pressure dyeing machine (Circular NS manufactured by Hisaka Senshoki Co., Ltd.), and then dehydrated and spread, and a softener was added and the final set was performed at 170°C using a tenter to finish. The finished density was 123 warp threads/2.54 cm and 74 weft threads/2.54 cm. Table 1 shows the details of the fabric construction of the woven fabric of Comparative Example 3 and the evaluation results of the fabric properties.

As can be seen from Table 1, all of Examples 1 to 7, which satisfy the requirements of the present invention, are excellent in moisture absorption (steaminess), stretchability (weft direction elongation), shape retention (W&W properties), and appearance quality (surface appearance, back surface protrusion). Furthermore, Example 6 shows that when the degree of entanglement of the highly crimped polyester yarn is high, the stretch elongation rate of the highly crimped polyester yarn decreases. Furthermore, Example 7 shows that the use of an antistatic yarn (ply-twisted yarn F) in the middle reed improves antistatic properties (frictional charging voltage).

In contrast, in Comparative Example 1, the yarn used for the middle reed is made of only cellulose fiber and does not contain highly crimped polyester yarn, so it is inferior in stretchability (weft elongation rate), shape retention (W&W property), and appearance quality (surface appearance, back surface protrusion). In Comparative Example 2, the yarn used for the middle reed is made of the same polyester fiber as the front and back reeds, so it is inferior in moisture absorption (stuffiness) and stretchability (weft elongation rate). Comparative Example 3 is a woven fabric rather than a knitted fabric, so it is inferior in stretchability (weft elongation rate), shape retention (W&W property), and appearance quality (surface appearance).

The warp knitted fabric for clothing of the present invention has excellent stretchability and moisture absorption properties, making it comfortable to wear, while also having a beautiful appearance and excellent shape retention and washing durability, making it useful for clothing that is washed frequently, such as uniforms.

Claims (7)

A warp knitted fabric for clothing is knitted with three or more reeds including a front reed, a middle reed, and a back reed, the front reed and the back reed using yarn made of polyester fiber containing 0.8 to 3.5% by mass of white metal oxide, the middle reed using a combined and twisted yarn of a spun yarn containing cellulose fiber and a polyester highly crimped yarn having a stretching elongation rate of 20% to 80% after hot water treatment at 90°C, the middle reed knitting an insertion weave, and the warp knitted fabric for clothing is characterized in that it satisfies all of the following conditions (i) to (iv):
(i) The basis weight is 90 to 230 g/ ^m2 ;
(ii) In an environment of 20°C and 85% RH, the moisture regain of the knitted fabric is 1.0 to 7.0% according to JIS-L1096:2010 8.10;
(iii) The elongation rate in the weft direction measured by the elongation rate method B (load 14.7 N) of JIS-L1096 is 25 to 65%;
(iv) The anti-see-through property according to JIS-L1923:2017B method is 87 to 98%. The warp knitted fabric for clothing according to claim 1, characterized in that the yarn used for the middle reed is a combination of a spun yarn containing cotton with a British cotton count of 40 to 120 and the polyester highly crimped yarn with no interlacing and a total fineness of 33 to 90 decitex, twisted together at a twist number of 10 to 300 T/m. The warp knitted fabric for clothing according to claim 1 or 2, characterized in that the front reed and the back reed are of a single-needle or double-needle construction, and the underlap directions of the front reed and the back reed are opposite to each other. The warp knitted fabric for clothing according to any one of claims 1 to 3, characterized in that the middle reed has a single-needle or double-needle insertion structure. A warp knitted fabric for clothing according to any one of claims 1 to 4, characterized in that the wash and wear property after 10 washes and tumble drying according to the JIS-L1096-C4M method is 3.0 or higher. The warp knitted fabric for clothing according to any one of claims 1 to 5, characterized in that the frictional charging voltage on the back surface measured according to JIS-L1094:2014 7.2B method is 0 to 2500 V after 10 washes according to JIS-L1096-C4M method. A garment made of the warp knitted fabric for clothing according to any one of claims 1 to 6, the garment being selected from the group consisting of a blouse, a dress shirt, a uniform shirt, a white coat, uniform pants, and a uniform jacket.

Images