JP2012017539A - Warp knitted fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a warp knitted fabric which has strong breaking strength and high tear strength, hardly causes a phenomenon (i.e. a run) that yarns cut at a scar due to a knife or the like and a hole formed by a burning cigarette end or the like continuously fray in the knitting starting direction due to external force such as compression, and has high safety, a soft cushioning property in the thickness direction, excellent fitness to a human body, stable and good seating feeling and a fray prevention effect.SOLUTION: A ground weave is composed of at least two reeds or more, and at least one reed (a first reed) is composed of a chain stitch or a tricot stitch of two needle swings or less and at least the other reed (a second reed) is composed of an inlay stitch of two or more and ten or less needles or a tricot stitch of one or more and eight or less needles. A low melting thermoplastic fiber is formed by the first reed, the second reed, or another reed. A warp knitted fabric is formed by integrating the low melting thermoplastic fiber placed in the ground weave with the ground weave by heat-sealing.

Description

  The present invention relates to a warp knitted fabric having cloth spring performance suitable as a cushion material for seat seats for automobiles, railway vehicles, airplanes, child seats, strollers, wheelchairs, furniture, offices and the like.

  Metal springs are made of woven or knitted fabric made of elastic fibers such as polyester-based elastomer fibers and polytrimethylene terephthalate fibers, and are stretched on the frame to exhibit cushioning properties based on the elastic fiber elongation recovery rate. Compared with urethane cushion materials, a seat having features such as thinness, light weight, and high air permeability can be configured. A woven or knitted fabric made of such elastic fibers is called a cloth spring and is being used in many seats such as office chairs and furniture. As such a woven or knitted fabric, Patent Document 1 discloses a specific configuration in which a ground structure is composed of chain knitting and multi-needle tricot knitting using fibers of a specific fineness, and insertion yarns are inserted in the vertical direction and / or the horizontal direction. By using a warp knitted fabric with a knitted density, a highly safe cloth spring material has been proposed that has high tear resistance and is less likely to cause scratches due to blades and the like. However, because the ground texture is chain knitted, the cut yarn runs (a phenomenon in which the cut yarn is continuously unwound in the knitting start direction by a load due to compression), and the strength against scratches by blades etc. is insufficient Met.

  A three-dimensional knitted fabric constituted by two layers of front and back knitted fabrics and connecting yarns connecting the two layers of knitted fabrics is excellent in cushioning properties and is suitably used as a cloth spring material. Patent Document 2 discloses a highly tearable and high-strength three-dimensional seat material that defines the vertical and horizontal elongation. In such a three-dimensional structure cloth spring material, it is preferable to use a monofilament for the connecting thread in order to improve the cushioning property in the thickness direction. There was a problem that it was likely to occur.

  Patent Document 3 discloses an elastic woven or knitted fabric excellent in cushioning properties, in which elastic yarns composed of two or more kinds of polyether ester elastomers having different melting points are arranged, and the woven or knitted fabric is heat-treated to produce a low melting point polyether ester An elastic woven or knitted fabric in which an elastomer resin is fused and solidified at an intersection of yarns of the woven or knitted fabric is disclosed. However, in this knitted or knitted fabric, although the intersection portion is reinforced by heat fusion, the resistance to tearing is not sufficient, and when a flaw is caused by a blade or the like, the flaw tends to spread, and there is a problem such as strength.

JP 2006-97170 A WO2005 / 034684 pamphlet JP 2001-159052 A

  The present invention solves the above-mentioned problems of the prior art, and has a strong breaking strength and a high tearing strength that makes it difficult to run the cut yarn. An object of the present invention is to provide a warp knitted fabric having a highly safe cloth spring performance in which the occurrence and spread of the fabric are suppressed.

  As a result of intensive studies on a combination of a specific geological structure and a specific low-melting point thermoplastic fiber, the present inventor has found that the above-mentioned problem can be achieved, and has completed the present invention.

That is, the present invention is as follows.
(1) The ground structure is composed of at least two folds, and at least one fold (first fold) is composed of a chain knitting or a tricot knitting up to two stitches, and at least one other fold (second fold). Is composed of an insertion knitting of 2 stitches or more and 10 stitches or less or a tricot knitting of 1 stitching or more and 8 stitches or less, and the low melting point thermoplastic fiber is knitted by the first heel, the second heel or another heel, A warp knitted fabric characterized in that the low-melting point thermoplastic fibers disposed on the fabric are integrated with the ground structure by heat fusion.
(2) The above-mentioned (1) is characterized in that the second kite is composed of a tricot knitting of 1 stitch or more and 8 stitches or less, and warps are inserted in the same direction or different directions with respect to the tricot knitting. Warp knitted fabric.
(3) The warp knitted fabric according to (1) or (2) above, wherein the smaller one of the warp direction and the transverse direction has a breaking strength of 600 N or more and a tearing strength of 100 N or more.
(4) A three-dimensional knitted fabric having a front and back two-layer knitted fabric and a connecting yarn that connects the two-layer knitted fabric, and the ground texture on either side of the front and back is any of the above (1) to (3) A three-dimensional warp knitted fabric characterized by being a warp knitted fabric according to any one of the above.
(5) A seat comprising the warp knitted fabric according to any one of (1) to (4) above.

  The warp knitted fabric of the present invention has a cloth spring performance, especially when used for a vehicle seat, the cut yarn is difficult to run, exhibits a strong breaking strength and a high tearing strength, and is damaged by a blade or tobacco fire. Therefore, it is possible to provide a stable sitting comfort.

Hereinafter, the present invention will be specifically described.
The warp knitted fabric of the present invention can form a planar cushion material by stretching it to variously shaped frames such as a quadrangle and a polygon by various methods such as sewing, resin molding, and bolting. The cushioning property when a person sits is expressed by the stretch characteristics of the warp knitted fabric of the present invention. The cushion material may be formed only of the frame and the warp knitted fabric of the present invention, but if necessary, other fibrous cushion materials such as three-dimensional knitted fabric, hard cotton, non-woven fabric and urethane may be formed on the warp knitted fabric of the present invention. Alternatively, a composite cushion material in which a skin material or the like is laminated may be used.

  The warp knitted fabric of the present invention is composed of a structure composed of at least two sheets. Of these, at least one sheet of paper is made up of a ground structure composed of a knit loop structure. The knit loop structure here refers to a knitting structure that always forms a knit loop, such as a tricot knitting. In order to improve the breaking strength and tearing strength, at least one hook (hereinafter, simply referred to as the first hook) constitutes a knit loop with chain knitting or tricot knitting with two stitches or less, and at least one other hook (Hereinafter simply referred to as the second rod) is preferably composed of an insertion knitting with 2 stitches or more and 10 stitches or less or a tricot knitting with 1 stitch or more and 8 stitches or less. In the present invention, the 1 × 1 denbi structure is expressed as a 1-needle tricot knitting, and the 1 × 2 code structure is expressed as a 2-needle tricot knitting, and the 1 × n structure is expressed as an n-needle swing tricot knitting.

  In addition to the resistance to breaking strength and tearing strength, in order to further suppress the deformation (structure deformation) of the stitches and to make the knitted fabric with good stretch recovery, the first ridge should be configured with a knit loop within 2 stitches. Is preferred. If the first heel is a three or more stitch swing, or the second heel is an insertion knitting of 11 stitches or less or an knitting tricot knitting of 9 stitches or more, the knitting property is inferior and the manufacture becomes difficult. In addition, it is preferable to entangle the insertion thread described later with at least two sheets of the ground structure because sufficient breaking strength, tearing strength and elongation recovery property can be obtained.

  The warp knitted fabric of the present invention is a run in which the cut yarn can be continuously unwound in the knitting start direction by knitting with the low-melting point thermoplastic fibers arranged in the ground structure composed of the two folds. Generation can be prevented. The low-melting point thermoplastic fiber only needs to have a lower melting point than other fibers disposed in the ground structure, and the melting point is preferably 130 ° C. or lower. The knitting structure of the low-melting point thermoplastic fiber is not particularly limited, and may be knitted with the first or second ridge or may be knitted with another ridge. It is preferable to have the same structure as the first knitted chain knitting or the tricot knitting with two stitches or less, more preferably the tricot knitting with two stitches or less, and further preferably the tricot knitting with one stitch. The yarn for knitting the ground texture and the low melting thermoplastic fibers may be knitted together or may be knitted separately, but the first knitted chain or tricot knitted and the second knitted insert or tricot knitted During this period, it is preferable to knitting in a separate cage. This is preferable because it is possible to effectively prevent the generation of runs in which the cut yarn is continuously unwound in the knitting start direction, and it is difficult for the low-melting point thermoplastic fibers to appear on the surface of the warp knitted fabric. By knitting the third low-melting thermoplastic fiber between the first knitted loop and the second knitted loop or the knitted loop, the low-melting thermoplastic fiber is By knitting so as to be positioned in the middle of the knit loop and covering the second heel sinker loop, the yarn of the first heel and the second heel can be firmly joined. Runs can be effectively suppressed.

  That is, it is preferable that the first kite is the front kite, the second kite is the back kite, and the third kite is an intermediate kite, and the first kite or tricot knitting and the second kite tricot knitting suppress excessive stretching, It is preferable to swing in a different direction in order to improve elongation recovery. Further, in order to improve the performance for preventing the occurrence of run, it is preferable that the insertion yarn is knitted with still another kite (hereinafter simply referred to as a fourth kite). At this time, it is preferable that the second tricot knitting and the fourth knitting yarn are swung in the same direction because the effect of restraining the run is improved. On the other hand, in order to suppress excessive stretching in the vertical direction, swinging in the opposite direction is preferable. .

  By stretching the warp knitted fabric of the present invention in a tensioned state or a slackened state on the seat frame, the warp knitted fabric fits to the human body when seated when the seat portion or the back portion of the seat is formed and is stable. In order to obtain sitting comfort, it is necessary to make a knitted structure with less deformation (texture deformation) of the stitches. For this reason, it is preferable to knit the insertion yarn in the vertical direction and / or the horizontal direction.

  When the insertion yarn is knitted in the warp direction, it is inserted between the needle loop and sinker loop of the ground yarn knitted with a structure such as tricot knitting with a swing width of 3 stitches or less per course, or the warp knitted fabric It is preferable to insert the insertion yarn in a straight line shape or a zigzag state over the entire length of the warp knitted fabric while being inserted between the sinker loops of the ground yarn continuous in the length direction. When weaving the insertion yarn in the horizontal direction, insert the insertion yarn in a state close to a straight line across the entire width of the warp knitted fabric between the needle loop and sinker loop of the ground yarn knitted with a structure such as tricot knitting. It is preferable.

  If the insertion yarn is knitted in the warp direction, the insertion yarn should be inserted in a different direction with respect to the underlap direction of the multi-needle swing tricot knitting of the ground structure in order to suppress the deformation (structure deformation) of the stitch. Is preferred. The swing width is preferably 3 stitches or less per course, more preferably 2 stitch swings or 1 swing swing than 3 swings. In the case of insertion in the horizontal direction, weft insertion can be performed using a Russell knitting machine equipped with a weft insertion device.

  It is preferable that the warp knitted fabric of the present invention has a strength that can sufficiently resist an action of supporting a person's weight in a stretched state and stroking a knee vigorously or when an impact force such as a collision is applied. For this purpose, it is preferable that the breaking strength and the tearing strength of the warp knitted fabric in both the warp direction and the transverse direction are not less than a certain value. Specifically, it is preferable that the smaller one of the warp direction and the transverse direction of the knitted fabric has a breaking strength of 600 N or more and a tear strength of 100 N or more. The breaking strength is more preferably 800 N or more, and still more preferably 1000 N or more. The tear strength is more preferably 120 N or more, and further preferably 150 N or more.

  The fineness of the fibers constituting the ground structure is preferably 200 to 1000 dtex, more preferably 250 to 700 dtex, from the viewpoint of improving the breaking strength and the tearing strength. When the fineness of the fibers constituting the ground texture is less than 200 dtex, the breaking strength and tearing strength tend to decrease, and the deformation (texture deformation) of the stitches is large, and the recovery may be reduced due to excessive elongation. In addition, when the ground structure is not composed of one or more knit loop structures, the breaking strength and the tearing strength are lowered. On the contrary, if the fineness of the fibers constituting the ground structure exceeds 2000 dtex, the knitting property is inferior and the production becomes difficult.

  In order to set the breaking strength of the warp knitted fabric of the present invention to 600 N or more and the tear strength to 100 N or more, a fiber having a strength of preferably 4 cN / dtex or more, more preferably 5 cN / dtex, and further preferably 6 cN / dtex or more. It is preferable to construct a warp knitted fabric using at least a part of the ground structure.

  Examples of the fibers used in the base structure of the warp knitted fabric or the insertion yarn include polyethylene terephthalate fiber, polytrimethylene terephthalate fiber, polybutylene terephthalate fiber, polyester elastomer fiber, polyamide fiber, polyacrylic fiber, and polypropylene fiber. Examples thereof include synthetic fibers, natural fibers such as cotton, hemp, and wool, recycled fibers such as cupra rayon, viscose rayon, and lyocell, and other arbitrary fibers. The cross-sectional shape of the fiber can be round, triangular, L-shaped, T-shaped, Y-shaped, W-shaped, Yaba-shaped, flattened, flat-shaped, dog-bone shaped, etc., multi-leafed, hollow or irregular Good. As the form of the fiber, any of unprocessed yarn, spun yarn, twisted yarn, false twisted yarn, fluid injection processed yarn and the like may be adopted. However, it is preferable to use the raw yarn (unprocessed yarn) from the viewpoint of suppressing the deformation of the stitch as much as possible with respect to the yarn used in the ground structure. The dry heat shrinkage at 5 ° C is preferably 5 to 20%, and more preferably 7 to 16%. As described above, since the strength is preferably 4 cN / dtex or more, polyethylene terephthalate fibers and polyamide fibers are particularly preferable.

  For the fibers used for the insertion yarn, polyethylene terephthalate fiber, polytrimethylene terephthalate fiber, or polyether ester-based elastic yarn is used for improving the stretch recovery and suppressing the plasticity after sitting for a long time. It is preferable to use the elastic fiber. Furthermore, the insertion yarn is preferably a monofilament of 300 to 3000 dtex in order to provide surface rigidity for preventing a local drop when a person is sitting and obtaining a stable seating feeling. When the monofilament is used as an insertion thread, the monofilament may be bonded to the ground tissue in order to prevent the monofilament from slipping and causing tissue deformation or plastic deformation after sitting. The method of bonding is preferably a method in which a sheath core monofilament whose monofilament surface is covered with a low melting point polymer is used, and the knitted fabric is knitted and then heat-sealed by heat setting or the like.

  The low melting point thermoplastic fiber knitted in the warp knitted fabric of the present invention can be used if the melting point is lower than other fibers constituting the ground structure, but from the viewpoint of maintenance of fabric flexibility and process control, Since low heat treatment temperature is better, the low melting point thermoplastic fiber is a low melting point polyester fiber having a melting point of 130 ° C. or less, a polyolefin fiber, a nylon fiber, a split type or core sheath using a low melting point component as a part of the fiber. A type composite fiber or the like is preferably used. The mixing ratio of these low melting point thermoplastic fibers can be appropriately selected in consideration of the intended product performance, the heat treatment temperature to be used, etc., but when using the finishing dry heat set treatment without using a special additional step, It is effective to prevent the occurrence of run by knitting a low melting point thermoplastic fiber having a melting point of 130 ° C. or less, more preferably 120 ° C. or less within a range of 5 to 30%.

  The fineness of the low melting point thermoplastic fiber disposed in the ground structure is preferably 50 to 500 dtex, more preferably 100 to 250 dtex from the viewpoint of run prevention. When the fineness of the low melting point thermoplastic fiber is less than 50 dtex, the force for fusing and fixing the knit loop of the yarn constituting the ground structure is weakened and easily unraveled. If it exceeds 500 dtex, the texture change due to fusion fixing is large, and the stretch recovery property is lowered. Fineness ratio of the fibers constituting the knit loop of the ground texture and the fineness ratio of the low melting thermoplastic fibers (fineness of the low melting thermoplastic fibers / fibers supplied to the ridges forming the knit loop of the ground texture (low melting thermoplastic fibers (Excluding) the total fineness) is preferably 0.10 to 0.50, and more preferably 0.20 to 0.40.

  Since the warp knitted fabric of the present invention is excellent in cloth spring performance, the seat on which the warp knitted fabric of the present invention is arranged can provide a fit to the human body and a stable sitting comfort when seated. Specifically, the warp knitted fabric of the present invention can be suitably used as a portion that forms a seat portion and / or a back portion of a seat by stretching the frame. The state in which the warp knitted fabric is stretched on the frame is not limited, and the warp knitted fabric is stretched by stretching around the warp knitted fabric or at least two sides of the warp knitted fabric in a tensioned state or a loosened state. May form a seat and a back. Any method can be used as a method of fixing the warp knitted fabric to the frame. For example, as described in JP-A-2002-219985, a method of fixing a plate member having a groove portion with a substantially U-shaped cross section to a knitted fabric end portion and engaging the groove portion of the plate member with an appropriate frame material , After the end of the warp knitted fabric is processed by welding, sewing, resin processing, etc., then pressing the end with a pressing member, etc., and fixing it to the frame with bolts, etc. Any method such as a method of passing a metal rod and fixing the metal rod to the frame can be used. In addition, by using a method of fixing the warp knitted fabric of the present invention to a frame via a metal spring such as a coil spring or a torsion bar, cushioning with a more stroke feeling can be imparted.

The warp knitted fabric of the present invention is preferably knitted using a Raschel knitting machine, and the gauge of the knitting machine is preferably 9 gauge to 28 gauge.
The basis weight of the warp knitted fabric can be arbitrarily set according to the purpose, but is preferably 200 to 1200 g / m ² , more preferably 250 to 800 g / m ² .

  The warp knitted fabric of the present invention may be a three-dimensional knitted fabric. Specifically, the warp knitted fabric configuration of the present invention can be applied to at least one of the front and back fabrics, which can be connected to each other with a connecting yarn. A three-dimensional knitted fabric by double raschel knitting is preferable, and the cushioning property in the thickness direction is improved and the vibration absorption is excellent.

  As the finishing processing method of the warp knitted fabric of the present invention, the raw machine can be finished through processes such as scouring, dyeing and heat setting, but the scouring and dyeing process can be omitted and the raw machine can be finished only by heat setting. At the time of this heat setting, the low melting point thermoplastic fibers are integrated with the ground structure by heat fusion. In addition, finishing processing such as resin processing, water absorption processing, antistatic processing, antibacterial processing, and flame retardant processing, which are used in normal fiber processing, can be applied as long as the object of the present invention is not impaired at the time of finishing set. As the heat treatment machine used in the finishing set, a pin tenter, a clip tenter, a short loop dryer, a shrink surfer dryer, a drum dryer, a continuous and batch tumbler, and the like can be used. The finished warp knitted fabric can be used for a tension type seat or the like by processing the end by means of fusion, sewing, resin processing, or processing into a desired shape by thermoforming or the like. .

Hereinafter, the present invention will be specifically described with reference to examples. However, the present invention is not limited to these examples. In addition, the measurement and evaluation of each characteristic in an example were performed by the following method.
(1) Stretch compression tear amount 5 mm thick, 40 cm square metal plate base is welded with 15 cm height equilateral angle steel legs, and 5 mm thick, 40 cm long, 5 width wide on the legs. 2. Two metal plates of 5 cm are welded in parallel with the two opposite sides of the foundation to create a tension frame having two warp knitted fabric fixing portions. A sandpaper of No. 40 is attached to the upper surface of the warp knitted fabric fixing portion on the two sides with a double-sided tape to provide anti-slip. On the other hand, a warp knitted fabric presser material in which a 40th sandpaper is attached to each lower surface of two metal plates having a thickness of 5 mm, a length of 40 cm, and a width of 5.5 cm with a double-sided tape to provide a slip stopper is produced.

Three knitted fabrics are cut into a 40 cm square, and three samples are prepared with a 25.4 mm length wound in the bias (45 degrees) direction at the center.
The knitted fabric sample is sandwiched between the warp knitted fabric fixing portions on the two sides and the presser material so as not to loosen, and a total of six locations are fixed with a vise.

  Using a Shimadzu autograph AG-B type (manufactured by Shimadzu Corporation), the central part (25.4 mm scratched part) of the knitted fabric sample stretched by a metal hemispherical compression jig with a diameter of 100 mm was 50 mm / min. Compress at a speed, measure by applying a load of 900 N first, then deweight, then remove the knitted fabric sample from the metal frame and measure the change in the size of the wound (maximum tear length or increase in size) To do. The measurement was performed 3 times and the average value was obtained. Thereafter, the same measurement is performed with a load of 2225N.

(2) Length of Run Generation After the measurement of (1) above, it was observed whether or not the run ran in the stitch direction (vertical, horizontal, slanting direction) from the scratched part. If the run runs, measure the length in the longest direction.
(3) Measurement of breaking strength Using a Shimadzu autograph tensile tester, a sample having a length of 200 mm and a width of 40 mm was measured at a pulling speed of 50 mm / min at a gripping interval of 100 mm, and the highest fracture obtained at that time. Use strength as a measurement.

(4) Measurement of tear strength Measured according to JIS L1096 8.15.1 A-1 method (single tongue method).
Using a Shimadzu autograph tensile tester, prepare a test piece with a length of 250 mm and a width of 50 mm, make a 100 mm cut at the center of the short side at right angles to the side, and then attach each tongue piece to the upper and lower clamps. Hold at a right angle. The distance between the grips of the test piece is 100 mm. The test piece is torn at a pulling speed of 200 mm / min, and the highest tear strength obtained at that time is taken as the measured value.

(5) Performance evaluation of seat A seat frame (no backrest) made of a mouth-shaped metal pipe material having a seat portion with a width of 520 mm, a depth of 470 mm, and a height of 320 mm is produced. A substantially U-shaped plate made of polybutylene terephthalate resin is sewn and attached to the entire width of both ends in the longitudinal direction of the knitted fabric of width 500 mm (weft direction) × length 570 mm (warp direction). One substantially U-shaped plate attached to the knitted fabric is engaged with a metal substantially U-shaped plate attached under the front edge of the seat frame, and a tension of 10 kg is applied to the entire width of the knitted fabric to apply tension. Then, the knitted fabric is stretched before and after the seat frame, and the knitted fabric is stretched by engaging the metal substantially U-shaped plate below the rear edge of the seat frame and the resin substantially U-shaped plate of the knitted fabric. When the positions of the metal substantially U-shaped plate and the resin substantially U-shaped plate are shifted due to a load of 10 kg, the positions where the metal substantially U-shaped plate and the resin substantially U-shaped plate are bolted are shifted and adjusted.

On the seat on which the knitted fabric is stretched, a man with a weight of 65 kg sits for 10 minutes with the knee facing the length of the knitted fabric and then leaves.
As an evaluation of sitting comfort at the time of sitting, the knitted fabric is subjected to a sensory evaluation on the flexibility and fit of the knitted fabric in the following four stages.
A: Moderate flexibility and excellent fit.
○: Flexibility is slightly higher or slightly harder and has better fit.
(Triangle | delta); A softness | flexibility is quite high, or it is quite hard and is inferior to fitting property.
X: It is too flexible or too hard to be inferior in fit.

The sense of discomfort during seating (sensation that the knitted fabric swells at the bottom of the buttocks and sits on a foreign object) is sensorially evaluated in the following four stages.
A: There is no sense of incongruity.
○: There is almost no sense of incongruity.
Δ: Somewhat uncomfortable.
×: Uncomfortable feeling is intense.

The sense of stability at the time of sitting is sensory evaluated in the following four stages.
A: Excellent stability with moderate surface rigidity.
○: The surface rigidity is slightly higher and there is a sense of stability.
Δ: Surface rigidity is slightly low and stability is inferior.
X: Low surface rigidity and inferior stability.

Furthermore, the recovery state of the knitted fabric after leaving the seat is visually evaluated, and sensory evaluation is performed in the following four stages.
◎; Recovered completely.
○: Almost recovered.
Δ: Slight indentation (deformation) remains.
X: A large hollow remains.

[Example 1]
Using a 14 gauge single raschel knitting machine equipped with four rivets, all the raw yarns of polyethylene terephthalate fibers with 560 dtex / 96 filaments and dry heat shrinkage of 12.9% from the creases (L1, L3) forming the ground texture Supplied in a yarn array of IN, and supplied with a 190 dtex / 20 filament polypropylene fiber (melting point 130 ° C.) in an all-in yarn array from the heel (L2) between the heels (L1 and L3) forming the ground texture Then, monofilaments of polyethylene terephthalate fibers of 660 dtex were supplied in an all-in yarn array from the insertion yarn ridge (L4).
The raw machine was knitted with the density of the on-machine course 13.98c / 2.54 cm with the knitting structure shown below. The obtained green machine was dry heat set at 180 ° C. for 3 minutes with a width to obtain a warp knitted fabric. Table 1 shows various physical properties of the obtained warp knitted fabric.
(Knitting organization)
L1: 10/01 // (all-in)
L2: 10/12 // (all-in)
L3: 10/56 // (all in)
L4: 22/00 // (all in)
L1 is a chain knitting with a first collar of the present invention, L3 is a 5-needle tricot knitting with a second collar (1 × 5 satin knitting), and L2 is a knitting with a low melting thermoplastic fiber with a third collar (first and second). One-hook swing tricot knitting in the same direction as the heel (1 × 1 denvi knitting)), L4 corresponds to the insertion knitting by the fourth heel (different swinging with the first, second, and third heels).
In this example, the fineness ratio of the fibers constituting the knit loop of the ground texture and the fineness ratio of the low melting thermoplastic fibers (fineness of the low melting thermoplastic fibers / fibers supplied to the ridges forming the knit loop of the ground texture (low melting point) The total fineness) (excluding thermoplastic fibers) is 190 / (560 × 2) = 0.17.
The resulting warp knitted fabric has strong breaking strength and high tearing strength that makes it difficult for the cut yarn to run, moderate flexibility, excellent fit, no discomfort in the buttocks, and excellent sitting comfort It was obtained. In addition, it showed the resilience to recover completely after leaving.

[Example 2]
In Example 1, a warp knitted fabric was obtained in the same manner as in Example 1 except that the L3 knitting structure for knitting the ground structure was changed as follows. Table 1 shows various physical properties of the obtained warp knitted fabric.
The resulting warp knitted fabric has strong breaking strength and high tear strength that makes it difficult for the cut yarn to run, moderate flexibility, excellent fit, no discomfort in the buttocks, and stable seating comfort. It was In addition, it showed resiliency to recover almost the same after leaving.
(Knitting organization)
L3: 77/00 // (all-in)

[Example 3]
Using the same single raschel knitting machine as in Example 1, all the yarns of polyethylene terephthalate fiber having 280 dtex / 48 filaments and dry heat shrinkage of 10.9% from the ridges (L1, L3) for knitting the ground texture are used. Supplied in an array, a 190 dtex / 20 filament polypropylene fiber yarn (melting point 130 ° C.) is fed in an all-in thread array from the cocoon (L2) between the cocoons (L1 and L3) forming the ground structure, and inserted. Monofilaments of polyethylene terephthalate fibers of 330 dtex were supplied in an all-in yarn array from a yarn ridge (L4).
With the knitting structure shown below, the green machine was knitted at a density of 14.98c / 2.54cm on-machine course. The obtained green machine was dry heat set at 180 ° C. for 3 minutes with a width to obtain a warp knitted fabric. Table 1 shows various physical properties of the obtained warp knitted fabric.
(Knitting organization)
L1: 10/23 // (all-in)
L2: 10/12 // (all-in)
L3: 10/56 // (all in)
L4: 22/00 // (all in)
The resulting warp knitted fabric has strong breaking strength and high tearing strength that makes it difficult for the cut yarn to run, moderate flexibility, excellent fit, no discomfort in the buttocks, and stable sitting comfort. It was In addition, it showed resiliency to recover almost the same after leaving.

[Example 4]
Using a 14 gauge single raschel knitting machine equipped with a weft insertion machine, all the raw yarns of polyethylene terephthalate fiber with 560 dtex / 96 filaments and dry heat shrinkage of 10.6% from the ridges (L1, L3) forming the ground texture Supplied in an in-line yarn array, a 190 dtex / 20 filament polypropylene fiber (melting point 130 ° C.) is supplied in an all-in thread array from the ridges (L2) between the ridges forming the ground structure, and is polyether-based A heat-fusible core-sheath composite polyether-based ester elastic yarn having an ester as a core component polymer and a heat-fusible polymer having a melting point lower than that of the core component polymer (fineness 1060 dtex, product of Toyobo Co., Ltd.) Name: Diaflora) is inserted into each course, and the following knitting structure is used to form a machine course of 13.2c / 2.54cm dense. In was organized greige. The obtained raw machine was dry heat set at 170 ° C. × 3 minutes with a width to obtain a warp knitted fabric. Table 1 shows various physical properties of the obtained warp knitted fabric.

(Knitting organization)
L1: 10/01 // (all-in)
L2: 10/12 // (all-in)
L3: 10/56 // (all in)
The resulting warp knitted fabric has strong breaking strength and high tearing strength that makes it difficult for the cut yarn to run, moderate flexibility, excellent fit, almost no discomfort in the buttocks, and excellent sitting comfort It was obtained. In addition, it showed resiliency to recover almost the same after leaving. Table 1 shows various physical properties of the obtained warp knitted fabric.
The obtained warp knitted fabric had a strong breaking strength and a high tearing strength, was moderately flexible and excellent in fit, had no discomfort in the buttocks, and was able to obtain a sitting comfort with excellent stability. . In addition, the recovery was shown to recover completely.

[Example 5]
Using a double raschel knitting machine, supply 167 dtex / 48 filament polyethylene terephthalate false twisted yarn to the ridges (L1, L2) and the linking yarn ridges (L3) constituting the surface knitted fabric, and the back knitted fabric The ridges (L4 to L7) constituting the ground obtained a three-dimensional knitted fabric by the same knitting method as in Example 1. Table 1 shows various physical properties of the warp knitted fabric.
(Knitting organization)
L1: 01111/2111 // (all in)
L2: 1211/1011 // (all in)
L3: 3410/4367 // (all-in)
L4: 1110/0001 // (all-in)
L5: 2210/0012 // (all-in)
L6: 6610/0056 // (all-in)
L7: 2222/0000 // (all in)
Regarding the back surface texture, L4 is a chain knitting by the first collar of the present invention, L6 is a five-needle tricot knitting (1 × 5 satin knitting) by the second collar, and L5 is a low melting thermoplastic fiber by the third collar. Knitting (one stitch swing tricot knitting in the same direction as the first and second rods (1 x 1 denvi knitting)), L7 is the insertion knitting by the fourth rod (swing away from the first, second, and third rods) It corresponds to.
The resulting warp knitted fabric has strong breaking strength and high tearing strength that makes it difficult for the cut yarn to run, moderate flexibility, excellent fit, no discomfort in the buttocks, and excellent sitting comfort It was obtained. In addition, it showed the resilience to recover completely after leaving.

[Example 6]
Using the same single raschel knitting machine as in Example 1, all the yarns of polyethylene terephthalate fiber having 280 dtex / 48 filaments and dry heat shrinkage of 10.9% from the ridges (L1, L3) for knitting the ground texture are used. 340 dtex / 45 filaments of polypropylene fiber (melting point 130 ° C.) is fed in an all-in thread arrangement from the cocoon (L2) between the cocoons (L1 and L3) forming the ground structure. Monofilaments of polyethylene terephthalate fibers of 330 dtex were supplied in an all-in yarn array from a yarn ridge (L4).
With the knitting structure shown below, the green machine was knitted at a density of 14.98c / 2.54cm on-machine course. The obtained green machine was dry heat set at 180 ° C. for 3 minutes with a width to obtain a warp knitted fabric. Table 1 shows various physical properties of the obtained warp knitted fabric.
(Knitting organization)
L1: 10/01 // (all-in)
L2: 10/12 // (all-in)
L3: 10/56 // (all in)
L4: 22/00 // (all in)
The resulting warp knitted fabric has strong breaking strength and high tearing strength that makes it difficult for the cut yarn to run, moderate flexibility, excellent fit, no discomfort in the buttocks, and excellent sitting comfort It was obtained. Although recovery after leaving is slightly inferior, there is no practical problem.

[Example 7]
In Example 1, except that a 60 dtex / 6 filament polypropylene fiber yarn (melting point 130 ° C.) was supplied in an all-in yarn arrangement from the cocoon (L2) between the cocoons (L1 and L3) forming the ground structure. A warp knitted fabric similar to Example 1 was obtained. Table 1 shows various physical properties of the obtained warp knitted fabric.
The obtained warp knitted fabric slightly increased in tension tension and run, but there was no problem in practical use, it had strong breaking strength and high tear strength, moderate flexibility and excellent fit, There was no sense of incongruity in the buttocks, and a comfortable sitting comfort was obtained. In addition, it showed the resilience to recover completely after leaving.

[Comparative Example 1]
In Example 1, an attempt was made to obtain a warp knitted fabric similar to Example 1 except that the knitting structure of the ridges (L1, L3) forming the ground structure was changed as follows, but the knitting property was poor. Thread breakage occurred frequently, and no fabric was obtained.
(Knitting organization)
L1: 10/34 // (all in)
L3: 10/56 // (all in)

[Comparative Example 2]
In Example 1, an attempt was made to obtain a warp knitted fabric in the same manner as in Example 1 except that the L3 knitting structure for knitting the ground structure was changed as follows, but the knitting property was poor and the yarn breakage occurred frequently. And dough was not obtained.
(Knitting organization)
L1: 11 11/00 // (all in)

[Comparative Example 3]
In Example 1, a base yarn of polyethylene terephthalate fiber having a 280 dtex / 48 filament and a dry heat shrinkage rate of 10.9% is supplied in an all-in yarn arrangement from the ridges (L1, L3) knitting the ground structure. A warp knitted fabric was obtained in the same manner as in Example 1 except that polypropylene fibers were not used for the folds (L2) between the folds to be formed (L1 and L3). Table 1 shows various physical properties of the obtained warp knitted fabric.
The obtained warp knitted fabric had no surface rigidity, was inferior in stability, and had poor recoverability after sitting. A run from the end of knitting occurred.

  The warp knitted fabric of the present invention has a cloth spring performance, and particularly when used for a vehicle seat, it has a strong breaking strength and a high tearing strength that makes it difficult to run the cut yarn, and is damaged by a blade or a cigarette fire. There is little and can provide a comfortable sitting comfort.

Claims (5)

  The ground structure is composed of at least two folds, at least one fold (first fold) is composed of chain knitting or tricot knitting or less, and the other at least one fold (second fold) is two stitches. It is composed of an insertion knitting of 10 stitches or less or a tricot knitting of 1 stitch or more and 8 stitches or less, and the low melting point thermoplastic fiber is knitted by the first heel, the second heel or another heel, and arranged in the ground structure A warp knitted fabric, wherein the low-melting point thermoplastic fiber is integrated with the ground structure by heat fusion.   The warp knitted fabric according to claim 1, wherein the second kite is composed of a tricot knitting of 1 to 8 stitches, and warps are inserted in the same direction or different directions with respect to the tricot knitting. .   The warp knitted fabric according to claim 1 or 2, wherein the breaking strength in the smaller one of the vertical direction and the horizontal direction is 600 N or more, and the tearing strength is 100 N or more.   The warp knitting according to any one of claims 1 to 3, wherein the fabric is a three-dimensional knitted fabric having a knitted fabric with two layers on the front and back sides and a connecting yarn that connects the knitted fabrics with the two layers. A three-dimensional warp knitted fabric characterized by being ground.   A seat comprising the warp knitted fabric according to any one of claims 1 to 4.