JP5850655B2 - Warp knitted fabric for fabric spring material - Google Patents

Description

  The present invention relates to a warp knitted fabric for a cloth spring material used as a cushion material for seat seats of automobiles, railway vehicles, airplanes, child seats, strollers, wheelchairs, furniture, office chairs and the like.

  By tying a woven or knitted fabric with high strength and excellent stretch recovery on the frame, it is possible to express the cushioning property by utilizing the stretch recovery of the woven or knitted fabric, and it is thinner than metal springs and urethane cushion materials. A seat having features such as light weight and high air permeability can be obtained. Such a woven or knitted fabric is called a cloth spring and is being used for many seating applications such as office chairs and furniture.

  In the following Patent Document 1, the ground structure is composed of a chain knitting and a 3-8 needle swing tricot knitting, and an insertion yarn is inserted into a warp, has a high tear resistance, and fits with a human body. A fabric spring material that is excellent in elasticity and good in stretch recovery is disclosed. However, when the cloth spring material of Patent Document 1 is rubbed in a state in which it is in strong contact with the metal frame, there is a case where an abnormal noise is generated due to friction between the metal and the fiber. For example, the end of the cloth spring material is folded and stitched to form a cylindrical cavity, and after inserting the cylindrical support frame into the cavity, the support frame is joined to the seat frame and the cloth spring material is stretched In this case, when a load such as a person's weight is applied to the cloth spring material, there is a problem that friction is generated between the support frame and the cloth spring material, and a rubbing sound is generated by rubbing the support frame and the fiber. The rubbing sound that occurs every time a load due to weight is applied has been a major problem in quiet interior spaces.

JP 2006-97170 A

  An object of the present invention is for a cloth spring material that solves the above-mentioned problems, prevents a rubbing sound generated by rubbing a cloth spring material and a metal frame or the like, and improves wear resistance against rubbing with the frame or the like. It is to provide warp knitted fabric.

The present inventor pays attention to the surface state of the warp knitted fabric for the cloth spring material, and disposes a special hook-shaped convex portion on the surface, which is caused by friction between the cloth spring material and a frame material such as metal. It has been found that noise can be reduced and wear resistance can be improved, and the present invention has been completed.
That is, the present invention is as follows.

(1) A ridge-like convex part is formed on at least one of the front and back surfaces of the ground texture, and the width of the convex part is 0.5 to 30 mm in at least a part of the ridge-like convex part. The height is 0.1 to 1.0 mm, the interval between the protrusions is 0.3 to 8 mm, and the ratio A / B of the protrusion width A (mm) to the interval B (mm) is 0.5 to 15 A warp knitted fabric for a cloth spring material.
(2) The ridge-like convex part is formed by a series of knit loops, and the bottom part between adjacent convex parts is formed by a sinker loop or an insertion thread in the same ground structure forming the knit loop. The warp knitted fabric for cloth spring material according to (1) above.
(3) In the series of knit loops forming the convex portion, the width of the hole formed in the center of the knit loop is less than or equal to half the width of the knit loop. ) Warp knitted fabric for cloth spring material.

  According to the present invention, it is possible to prevent a rubbing sound that is generated when the cloth spring material and the frame or the like are rubbed in a seat sheet or the like in which the cloth spring material is stretched on a metal frame or the like. Further, even when a load such as a person's weight is applied to the cloth spring material, and the cloth spring material is deformed or bent, friction with the frame material is generated, so that an unpleasant rubbing sound is hardly generated. Furthermore, the wear resistance when the cloth spring material is rubbed by a frame or the like can be improved.

Hereinafter, the present invention will be described in detail.
The cloth spring material referred to in the present invention is a planar cushion formed by stretching a cloth spring material on a seat frame having various shapes such as a substantially rectangular shape and a polygon shape by various methods such as sewing, resin molding, and bolting. A material is formed, and the cushioning property when a person sits down is expressed by utilizing the elongation characteristic of the cloth spring material.

  The cloth spring material is joined directly to the seat frame, or joined to the seat frame via a metal spring or the like to form a cushion layer. If necessary, a cushion material obtained by laminating a fibrous cushioning material such as a three-dimensional knitted fabric, hard cotton, non-woven fabric, and a three-dimensional network on top of a cloth spring material, urethane, and a skin material.

  The warp knitted fabric for cloth spring material of the present invention is formed by warp knitting, but in order to reduce the noise generated by rubbing the surface of the cloth spring material and a frame member such as metal, A bowl-shaped convex part is formed on at least one surface. In the bowl-shaped convex part, the surface state of the surface of the convex part and the bottom surface between adjacent convex parts (hereinafter, the part between adjacent convex parts may be referred to as a concave part) needs to be a perfect plane. However, there may be a finer subsidence or bulge in each surface, or an opening or the like.

  The direction of the ridge may be formed in the length direction of the ground texture or in the width direction. The ridge may be formed by meandering, but is preferably substantially linear. In order to prevent the rubbing sound stably, it is preferable that the wrinkles are continuous over the entire length direction or width direction of the ground structure, but the wrinkles are partially cut or the width of the wrinkles is It may change partially. When the heel is partially cut, in order to reduce the rubbing sound, it is preferable that the heel is formed in an area of 50% or more of the knitted fabric length in the direction in which the heel is formed. % Or more is more preferable. The minimum length of the wrinkles is preferably 3 mm or more, more preferably 5 mm or more. The length of the region where the ridges are cut is preferably 5 mm or less, more preferably 3 mm or less.

  The shape of the convex portion is measured by observing the surface having the convex portion directly above, the length direction of the ground structure, or the cross section in the width direction with a magnifying glass or the like. From the viewpoint of preventing rubbing noise and improving the wear resistance of the surface, the width of the protrusions is 0.5 to 30 mm, the distance between the protrusions is 0.3 to 8 mm, the width A (mm) of the protrusions and the height of the protrusions It is necessary that the ratio A / B of the interval B (mm) is 0.5 to 15.

The width of the protrusions and the spacing here are obtained by measuring the widths of 10 locations as viewed from directly above the surface having the protrusions, and obtaining the average value thereof. If it is less than 0.5 mm, the wear resistance of the surface is extremely lowered. When the width of the convex portion exceeds 30 mm, in order to reduce the rubbing noise, the interval between the adjacent convex portions (the width of the concave portion) must be increased, and as a result, the width of the concave portion becomes too wide. Thus, the cloth spring material is easily pressed against the frame member, and the concave portion is also in contact with the frame material, and a rubbing sound is easily generated. A more preferable range of the width of the convex portion is 0.7 to 8 mm, and further preferably 0.8 to 4 mm.
In the present invention, the width of the convex portion refers to the width of the region where the knitting yarn constituting the convex portion is present.

  In addition, when a micro recessed part exists in the convex part of this invention, this recessed part is not regarded as the space | interval of a convex part, but a continuous convex part may be regarded, and in the case of a recessed part whose width is less than 0.3 mm, The width of the convex portion may be calculated by ignoring the concave portion. For example, when a 0.2 mm wide concave portion exists between a 1 mm wide convex portion and a 1 mm wide convex portion, these may be regarded as a single convex portion having a width of 2.2 mm.

  Further, if the interval between the convex portions (width of the concave portion) is less than 0.3 mm, the effect of preventing the rubbing sound is small. If the interval exceeds 8 mm, the concave portion also comes into contact with the frame material when the cloth spring material is pressed against the frame member. Rubbing noise is likely to occur. A more preferable range of the interval between the convex portions is 0.4 to 5 mm, and further preferably 0.4 to 3 mm.

  In the present invention, the ratio A / B between the width A of the convex portions and the interval B between the convex portions is in the range of 0.5 to 15. When A / B is less than 0.5, the wear resistance is lowered, or the concave portion is rubbed to cause a problem that the rubbing noise prevention effect is reduced. When A / B exceeds 15, the rubbing noise prevention effect is obtained. Disappear. The more preferable range of A / B is 1 to 10, and more preferably 1.5 to 7.

  In the present invention, from the viewpoint of preventing rubbing noise and improving the handleability of the cloth spring material, the height of the convex portion is preferably in the range of 0.1 to 1.0 mm. Here, the height of the convex portion is indicated by an average value obtained by arbitrarily measuring ten convex portions by observing a cross-sectional photograph with reference to the bottom portion between adjacent convex portions. When the thickness is less than 0.1 mm, when pressed against the frame member, the concave portion comes into contact with the frame member at the same time as the convex portion, and it is difficult to prevent a rubbing sound. When the height of the convex part exceeds 1.0 mm, the handleability and the bonding strength when the cloth spring materials are combined with each other or other members by sewing or the like are lowered. A more preferable height of the convex portion is 0.2 to 0.8 mm.

  Here, in the case where things having different widths, heights and intervals of the convex portions in the knitted fabric are mixed, it is preferable that 80% or more of the total convex portions are in the above range, and more preferably 90% or more, Most preferably, 100% is within the above range. Similarly, regarding A / B, 80% or more of the width A and the A / B in the interval B of all adjacent protrusions is preferably within the above range, more preferably 90% or more, and 100%. Is most preferably within the above range.

  In the warp knitted fabric for cloth spring material, the method of forming the ridge-shaped convex part is a method of forming a knit loop on one surface of the ground structure and forming it on the surface of the ground structure in the length direction, and a sinker loop of the ground structure. There are a method of projecting it on one side and connecting it in the length direction and the width direction, a method of partially thickening the fibers forming the knit loop and sinker loop, and the like. Among these, a method of forming a ridge-like convex portion by connecting the knit loop in the length direction of the ground structure is preferable in terms of further stabilizing the shape of the ridge and improving the wear resistance.

  In order to form a ridge-shaped convex part by a series of knit loops, adjust the thickness of the yarn forming the series of knit loops to the gauge of the knitting machine, and further optimize the width setting when finishing set Therefore, it is preferable to form a clear convex portion between the knit loop and the sinker loop visible from the knit loop side, and to optimize the width and interval of the convex portions. In particular, the vertical and horizontal dimension fixing method during heat setting of the raw machine is important in forming the bowl-shaped convex part shape, and the width-developing rate and underfeed rate are appropriately set according to the stitch state of the raw machine. It can be adjusted to form a clear bowl-shaped convex part.

  When the convex part is formed by a series of knit loops, the bottom part between the adjacent convex parts (the bottom part of the concave part) is a sinker loop of yarn forming the knit loop, or an insertion thread or convex part knitted into the series of knit loops Is formed by a series of knit loops different from the knit loops forming the knit loop. The series of knit loops that form the convex portion may be composed of one wale or a plurality of wales. When forming a convex part with a some wale, from a viewpoint of rubbing sound prevention, 5 or less wales are preferable, More preferably, it is 2 or less wales, More preferably, it is 1 wale.

  Furthermore, when forming a ridge-like convex part by a series of knit loops, the width of the hole formed in the center of the knit loop is one half of the width of the knit loop (the width of the widest part). The following is preferable. Here, the width of the hole and the width of the knit loop indicate the length in the width direction of the ground texture. The width of the hole formed at the center of the knit loop refers to the distance inside the two column parts of the knit loop at the widest part of the knit loop. The width of the hole formed in the center of the knit loop (the average value obtained by arbitrarily measuring the width of 10 holes) is the width of the knit loop (the average value obtained by arbitrarily measuring the width of the 10 knit loops). If it is larger than one half of the above, the wear resistance of the surface of the convex portion is lowered, and the stretch recovery property of the cloth spring material becomes insufficient, more preferably one third or less, still more preferably 4 minutes. 1 or less. The width of the hole formed at the center of the knit loop is preferably 0 to 0.5 mm, more preferably 0 to 0.3 mm from the viewpoint of improving wear resistance and elongation recovery.

  When the convex portion is formed by a series of knit loops, the knit loop is preferably formed by multifilaments supplied from at least one ridge. In this case, the knit loops are connected while being meandered slightly, but the knit loop is composed of multifilaments supplied from at least two ridges in order to further reduce the meandering and improve the stretch recovery in the length direction of the ground texture. More preferably. In addition, it is preferable that the swing of the two ridges is in the opposite direction in order to suppress the meandering of the knit loop. Furthermore, in a knit loop formed of multifilaments supplied from at least two folds, if the multifilament supplied from at least one fold is a chain knitting, the elastic modulus in the length direction of the ground texture is increased. More preferred.

  In the present invention, the outermost surface of the convex portion of the ridge is composed of multifilaments, and when the length direction of the ridge-shaped convex portion is set to a reference line of 0 degrees, the multifilament single fiber of the outermost surface of the convex portion is The inclination is preferably in the range of 0 to 60 degrees. By making the inclination of the single filament of the multifilament within the range of 0 to 60 degrees, it is possible to further reduce the sound when rubbing in the reference line direction, and also wear resistance when rubbing in the reference line direction Can be improved.

  The inclination of the multifilament monofilament on the outermost surface of the convex portion is obtained by taking an enlarged photograph (about 100 to 200 times) when the convex portion is viewed from directly above, and being single relative to the reference line in the length direction of the hook-shaped convex portion. It is a value obtained by measuring the angle on the acute angle side where the fiber is tilted to the maximum, and all values are displayed as positive values. In the enlarged photograph, the outermost surface of 10 convex portions is arbitrarily photographed, and the angle at which the single fiber is inclined to the maximum is taken as the inclination of the single fiber.

  It should be noted that the convex outermost surface is observed by focusing on the outermost surface side (about 0 to 50 μm) when focusing on an enlarged photograph with a microscope or an optical microscope. In FIG. 2, the portion sinking 50 μm or more is not defined as the outermost surface. In addition, the case where the single fiber is raised in a single shot is ignored.

  The inclination of the multifilament single fiber on the outermost surface of the convex portion is preferably 0 to 45 degrees, more preferably 0 to 40 degrees, and still more preferably 0 to 30 in order to further reduce rubbing noise and improve wear resistance. Degree.

  The warp knitted fabric for cloth spring material according to the present invention has an insertion yarn made of monofilaments in the vertical direction and / or the horizontal direction in order to improve the recovery after stretching and at the same time increase the surface rigidity and improve the posture support of the human body. It is preferable to mix. When the insertion yarn is knitted in the warp direction, it is inserted between the needle loop and the sinker loop of the ground yarn knitted with a structure such as chain knitting or tricot knitting with a swing width of 3 stitches or less per course, or warp It is preferable that the insertion yarn is inserted in a straight line shape or a zigzag shape over the entire length of the knitted fabric while being inserted between the sinker loops of the ground yarn continuous in the length direction of the knitted fabric. When the insertion yarn is knitted in the horizontal direction, the shape of the insertion yarn is close to a straight line across the entire width of the warp knitted fabric between the needle loop and the sinker loop of the ground yarn knitted with a structure such as chain stitch or tricot knitting. Is preferably inserted.

  The warp knitted fabric for the cloth spring material of the present invention is preferably produced using a single raschel knitting machine or a double raschel knitting machine. The warp knitted fabric for the fabric spring material may be a single warp knitted fabric, and the ground structure of the warp knitted fabric for the fabric spring material of the present invention is formed in at least one layer, and two or more warp knitted fabrics are integrated. A double warp knitted fabric or a three-dimensional knitted fabric in which front and back ground structures are connected by connecting yarns may be used. In the case of a double warp knitted fabric or a three-dimensional knitted fabric, a cushion in the thickness direction can be imparted to the warp knitted fabric for cloth spring material, which is preferable.

  Arbitrary fibers can be used as the fibers constituting the texture of the warp knitted fabric for the cloth spring material of the present invention, but in order to increase the strength of the cloth spring material, polyester fibers, polyamide fibers, etc. It is preferable to use synthetic fibers. Further, in order to further improve the stretch recovery property of the cloth spring material, a fiber excellent in elastic recovery property such as polytrimethylene terephthalate fiber or polyester elastomer fiber may be used.

  Although the thing of arbitrary fineness can be used for the multifilament used for the ground organization of the warp knitted fabric for cloth spring materials of this invention, it is preferable to use the fineness of 150-1500 decitex. More preferably, it is 160-1000 dtex, More preferably, it is 250-700 dtex. The single yarn fineness is preferably 2 to 10 dtex.

  When using a monofilament for the ground tissue, it is preferable to use a fineness of the monofilament of 200 to 3000 dtex. In the case of using a monofilament, the monofilament may be bonded to the ground tissue in order to prevent the monofilament from slipping and deforming the ground tissue. Adhesion methods include a sheath core monofilament with a monofilament surface covered with a low-melting polymer, heat-bonded by heat setting after forming the ground structure, or a low-melting fiber braided into the ground structure. A method of thermally fusing the monofilament with the monofilament or a method of resin coating at least one side of the ground structure is preferable.

Although the basis weight of the cloth spring material for warp knitted fabric can be arbitrarily set depending on the purpose, preferably 200 to 1000 g / m ^2, more preferably a 250~800g / m ^2.
In addition, the warp knitted fabric for cloth spring material of the present invention has a tensile strength (A method cut strip method) according to the JASO M 403-88 method in order to ensure safety when used as a vehicle seat. Both the length direction and the width direction of the ground are preferably 1000 N or more, and more preferably 1500 N or more. Furthermore, the tear strength (A method single-tung method) is preferably 120 N or more in both the length direction and the width direction of the knitted fabric, and more preferably 150 N or more.
The warp knitted fabric for the fabric spring material is subjected to processing such as sewing for joining to a frame such as a seat seat as necessary, and is used as a stretch-type seat seat or the like as a fabric spring material.
The state in which the cloth spring material is stretched on the seat frame is not limited, and the cloth spring material is stretched by tensioning or slackening the outer periphery or at least two sides of the cloth spring material on the back or the seat frame. A seat in which the material forms a seat and a back is obtained.

Any method can be used for fixing the cloth spring material to the frame. For example, a resin plate member having a groove portion having a substantially U-shaped cross section at the end portion of the cloth spring material, a method of engaging the groove portion of the plate member with an appropriate frame material, and welding the end portion of the cloth spring material , After processing by sewing, resin processing, etc., pressing the end with a pressing member etc. and fixing it to the frame with bolting etc., passing the metal rod through the end folded back and sewing the metal rod into the frame Any method can be used, such as a method of fixing to a resin frame or molding with a resin frame. In addition, by using a method of fixing the cloth spring material to the frame via a metal spring such as a coil spring or a torsion bar, cushioning with a more stroke feeling can be imparted.
In addition, in order to suppress the rubbing sound by the warp knitted fabric for cloth spring material of the present invention, the length direction of the ridge-like convex portion of the knitted fabric is arranged in a direction substantially perpendicular to the direction shifted from the seat frame. good.

  The warp knitted fabric for the fabric spring material of the present invention is prepared by finishing the raw machine through processes such as scouring, dyeing, heat setting, etc., and then cutting it into a desired shape and size, and then sewing a sewing thread around the cut portion to prevent fraying. It is formed into a cloth spring material by performing or joining to warp knitted fabrics for the cloth spring material or other members by sewing or bonding. As long as the object of the present invention is not impaired during the finishing process, finishing processes such as resin processing, antistatic processing, antibacterial processing, water repellent processing, and flame retardant processing, which are usually used for fiber processing, may be applied. In particular, it is preferable to perform resin processing such as polyurethane, vinyl chloride, acrylic, silicone, fluorine, chloroprene, etc. in order to further improve the fraying prevention property of the ground structure.

EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited only to these examples. In addition, evaluation and measurement of each characteristic in an Example were performed with the following method.
(1) Convex shape measurement Surface photographs and cross-sectional photographs of warp knitted fabrics for fabric spring materials were taken at an appropriate magnification that allows easy viewing of convex shapes in the range of 10 to 50 times, and the height, width and convexity of the convex portions. Measure the spacing dimension. Dimensional measurement is arbitrarily performed at 10 points to obtain an average value.

(2) Rubbing sound A seat frame (without a backrest) made of a mouth-shaped metal pipe material having a seat part of 52 cm in width, 47 cm in depth, and 32 cm in height is produced. From the finished warp knitted fabric for fabric spring material, a 57 cm × 50 cm rectangle having a length of 57 cm is cut in the length direction of the hook-shaped convex portion, and the entire circumference is cut at a distance of 4 mm from the cut end, and # 8 polyester yarn The fabric spring material was obtained by sewing with a sewing thread of 3 mm with a stitch pitch of 3 mm. Further, a substantially U-shaped plate made of polybutylene terephthalate resin is attached by sewing to the entire width of two sides (two places) of 50 cm. The seat in a state where one substantially U-shaped plate of the cloth spring material is engaged with a metal substantially U-shaped plate attached below the front edge of the seat frame, and a tension of 10 kg is applied to the entire 50 cm width of the cloth spring material. Fabric springs are stretched on the front and back of the frame, and the seats are stretched by engaging the substantially U-shaped metal plate below the rear edge of the seat frame and the approximately U-shaped plate of the fabric spring material. . If the positions of the metal substantially U-shaped plate and the resin substantially U-shaped plate are shifted when a tension of 10 kg is applied, adjust the position of the metal resin approximately U-shaped plate by bolting. The cloth spring material is in contact with the upper and outer side surfaces of the front and rear edge frames of the seat frame, and when the person sits on the seat with the 57cm side of the cloth spring material aligned with the knee. The cloth spring material and the front and rear edge frames are rubbed.
The following four levels are evaluated by listening to the rubbing sound that is generated when a man with a weight of 65 kg sits deeply on the seat five times.
A: There is almost no rubbing sound.
○: A slight rubbing sound is generated.
Δ: A considerable rubbing sound is generated.
X: A very loud rubbing sound is generated.

(3) Abrasion resistance According to JASO M403-88 flat wear test method, wear test of No. 6 cotton canvas friction cloth, pressing load of 9.81N, test number of 10,000 times, and the surface wear state was visually evaluated as follows. Give a grade.
Grade 5: No change is observed.
Grade 4: Slight change is observed.
Grade 3: A change is clearly recognized.
Grade 2: The change is slightly remarkable.
Grade 1: The change is remarkable.

[Examples 1 to 5 and Comparative Examples 1 to 4]
Using a 14-gauge Russell knitting machine equipped with four ridges, 560 decitex / 96 filaments of polyethylene terephthalate fibers are fed in an all-in arrangement from the ridge (L2) forming the ground structure, and the ridge for insertion A monofilament of polytrimethylene terephthalate fibers of 880 dtex from (L3) was supplied in an all-in arrangement. In addition, the yarn of 560 dtex / 96 filaments is removed from the ridge (L1) forming the ground structure by 1-in-1 out, 2-in-1 out, 5-in-1 out, 10-in-1 out, 10-in-3 out, 1 in 2 out, 10 in 5 out, 20 in 1 out, all-in sequences were supplied.

In the following knitting structure, the raw machine was knitted at a density of on-machine course 14.0 course / 2.54 cm. The obtained green machine was dry-heat set at 150 ° C. × 3 minutes with a width (width-developing rate 0%, underfeed rate 0%) to obtain a warp knitted fabric for cloth spring material.
(Knitting organization)
L1: 20/02 /
L2: 20/1012 /
L3: 44/00 /

The obtained warp knitted fabric for cloth spring material measures the convex shape of the knit loop surface and evaluates the wear resistance, cuts out a 57 cm × 50 cm rectangle of 57 cm in the length direction and 50 cm in the width direction from the cloth, The tension spring seat was made as a fabric spring material that was sewn at a stitch pitch of 3 mm with a # 8 polyester sewing machine thread at a distance of 4 mm from the cut end, and the knit loop surface was in contact with the frame. The rubbing sound was evaluated. The obtained results are shown in Table 1.
The obtained knitted fabric for fabric spring material was formed in a cocoon shape in which convex portions due to continuous knit loops and concave portions due to thread removal were continuous in the warp direction of the knitted fabric. In the case where the width of the concave portion formed by thread removal was appropriately formed relative to the width of the convex portion, there was almost no generation of rubbing noise and good wear resistance. In Example 1 in which the ratio A / B of the convex portion width to the convex portion interval (concave portion width) is relatively small, a slight change was observed in the wear resistance. However, as A / B increased, the friction resistance also increased. There was a tendency to improve.

[Example 6]
Using a 14-gauge Russell knitting machine equipped with four ridges, 560 decitex / 96 filaments of polyethylene terephthalate fibers are fed in an all-in array from the ridge (L1) forming the chain stitch of the ground structure. 280 decitex / 48 filament polyethylene terephthalate fiber yarns are fed in an all-in arrangement from the heels (L2, L3) forming the multi-needle swing tricot knitting of the tissue, and 660 dtex from the heel for insertion yarn (L4) Polyethylene terephthalate fiber monofilaments were fed in an all-in arrangement.

In the knitting structure shown below, among the yarns supplied from L1, L2, and L3 that form convex portions by a series of knit loops, L1 is a chain knitting, and L2 and L3 are used to reduce the inclination of the column part of the knit loop. The machine was organized in the reverse direction. The obtained green machine was dry-heat heat set at 180 ° C. for 3 minutes with a tentering rate of 3% and an underfeed rate of 2% to obtain a warp knitted fabric for cloth spring material.
(Knitting organization)
L1: 20/02 / (all-in)
L2: 20/810 / (all-in)
L3: 810/20 (all-in)
L4: 44/00 / (all in)

The cloth spring material warp knitted fabric was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
The resulting knitted fabric for cloth spring material has a convex portion formed by a series of knit loops formed in a substantially straight line, and there is almost no generation of rubbing noise. there were.

[Example 7]
Using a 14-gauge Russell knitting machine equipped with four ridges, 560 decitex / 96 filaments of polyethylene terephthalate fibers are fed in an all-in array from the ridge (L1) forming the chain stitch of the ground structure. The raw yarn of 280 dtex / 96 filaments of polyethylene terephthalate fiber is supplied in an all-in arrangement from the heel (L2) forming the multi-needle swing tricot knitting of the tissue, and 660 dtex polyethylene terephthalate is supplied from the heel (L3) for the insertion yarn. Fiber monofilaments were fed in an all-in arrangement with a swing in the same direction as the L2 swing direction.

The knitting machine was knitted with the following knitting structure, and the obtained knitting machine was dry-heat set at 180 ° C. for 3 minutes with a width ratio of 3% and an underfeed rate of 3% to obtain a knitted fabric for cloth spring material.
(Knitting organization)
L1: 20/02 / (all-in)
L2: 20/1012 / (all-in)
L3: 00/66 (all-in)

The fabric spring material knitted fabric was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
The obtained knitted fabric for a fabric spring material was slightly worried but did not bother. Further, the convex portions due to the series of knit loops were meandering slightly, and the inclination of the single fibers on the outermost surface of the convex portions was slightly large, so that the wear resistance was slightly changed, but the level was good.

[Comparative Example 5]
In the green machine obtained in Example 7, the knitting fabric for the cloth spring material was obtained by changing the tentering rate and the underfeed rate at the time of dry heat setting and setting the tentering rate -3% and the underfeed rate 0%. The fabric spring material knitted fabric was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
The resulting knitted fabric for cloth spring material had a considerable amount of rubbing noise because the spacing between the convex portions was small. Moreover, since the width of the hole in the knit loop is relatively large with respect to the width of the knit loop, a change in wear resistance was clearly recognized.

[Example 8]
In the green machine obtained in Example 7, the knitting fabric for the fabric spring material was obtained by changing the tentering rate and the underfeed rate at the time of dry heat setting and setting the tentering rate to 5% and the overfeed rate to 3%. The fabric spring material knitted fabric was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
The obtained fabric spring material knitted fabric has a high effect of preventing rubbing noise, but the wear resistance changes due to the inclination of the single fiber on the outermost surface of the convex portion exceeding 60 degrees. It was clearly recognized.

[Comparative Example 6]
Using an 18-gauge Russell knitting machine equipped with four rivets, 280 decitex / 48-filament polyethylene terephthalate fibers are fed in an all-in arrangement from the reed (L1) forming the chain knitting of the ground structure. 280 decitex / 96 filament polyethylene terephthalate fiber yarns are fed in an all-in arrangement from the heels (L2, L3) forming the multi-needle swing tricot knitting of the tissue, and 330 dtex from the heel for insertion yarn (L4) Polyethylene terephthalate fiber monofilaments were fed in an all-in arrangement.
A fabric spring material was knitted with the same knitting structure as in Example 1, and a fabric spring material knitting machine in which a hook-shaped convex portion was formed on the sinker loop side was knitted. The obtained green machine was dry-heat set at 180 ° C. for 3 minutes at a tentering rate of 0% and an underfeed rate of 0% to obtain a fabric spring material knitted fabric.

The fabric spring material knitted fabric was evaluated with the sinker loop surface as the surface in contact with the frame, and the results are shown in Table 1.
The obtained fabric spring material knitted fabric has convex portions formed by sinker loops formed intermittently in the length direction, but the width of the convex portions is too small, so there is little effect to prevent rubbing noise and wear resistance. The surface change was remarkable.

[Example 9]
Using a 14 gauge, 6 mm double raschel knitting machine equipped with 6 cocoons, 560 decitex / 96 filament polyethylene terephthalate fibers are fed in an all-in array from the cocoon (L2) forming the ground structure. 880 decitex polytrimethylene terephthalate monofilaments were fed in an all-in array from the insertion cage (L1). In addition, 560 decitex / 96 filament raw yarn was supplied from the ridge (L3) forming the ground texture in a 2-in-1-out arrangement by thread removal. In addition, 200 dtex polytrimethylene terephthalate fibers are supplied in an all-in arrangement from the ridge (L4) forming the connecting yarn, and 330 dtex / 96 filaments are formed from the ridge (L5, L6) forming the ground structure on the opposite side. Polyethylene terephthalate false twisted yarn was supplied in an all-in arrangement.
In the following knitting structure, the raw machine was knitted at a density of on-machine course 14.0 course / 2.54 cm. The obtained green machine was dry-heat set at 150 ° C. × 3 minutes with a width (width-developing rate 0%, underfeed rate 0%) to obtain a warp knitted fabric for cloth spring material.
(Knitting organization)
L1: 4400/0044 /
L2: 2044/101266 /
L3: 2022/2422 /
L4: 2046 /
L5: 2220/2224
L6: 2224/2220
The warp knitted fabric for cloth spring material obtained was measured for the convex shape of the knit loop surface formed by the ground structure of L1, L2, and L3 and evaluated for wear resistance, and evaluated in the same manner as in Example 1. The results are shown in Table 1.
The obtained fabric for fabric spring material has an appropriate spacing between the projections by thread removal with respect to the width of the projections, and there is almost no rubbing noise and good wear resistance. It was. Further, the cushioning property in the thickness direction was good.

  The warp knitted fabric for a cloth spring material according to the present invention can prevent abrasion noise generated by rubbing a cloth spring material and a metal frame or the like, and can improve wear resistance against rubbing with the frame or the like. Therefore, it can be used as a cushion material for seat seats for automobiles, railway vehicles, airplanes, child seats, strollers, wheelchairs, furniture, offices, etc., and it can be suitably used without a sense of incongruity especially in quiet interior spaces.

Claims (2)

A ridge-like convex part is formed on at least one of the front and back surfaces of the ground texture, and the width of the convex part is 0.5 to 30 mm and the height of the convex part is at least part of the ridge-like convex part. 0.1 to 1.0 mm, interval between the convex portions 0.3～8Mm, Ri ratio a / B is 0.5 to 15 der width a of the convex portion (mm) and spacing of the protrusions B (mm) The ridge-like convex part is formed by a series of knit loops, and the bottom part between adjacent convex parts is formed by a sinker loop or an insertion thread in the same ground structure forming the knit loop. Warp knitted fabric for fabric spring material. In a series of knitted loops forming the convex portion, the width of the hole formed in the center of the knitted loop, Ru der less than half of the horizontal width of the knit loops, for fiber spring material according to claim 1 Warp knitted fabric.