JP2011256497A - Cushioning double warp-knitted fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cushioning double warp-knitted fabric excellent for its cushioning property in spite of its light weight, which allows high concealment of the surface of a construction bed, in which irregularities due to small bumps on the construction bed surface are hard to be found on the surface of the obverse knitted fabric and connecting yarns are hard to be caught and pulled out by male hook-and-loop fasteners.SOLUTION: A double warp-knitted fabric is organized by connecting an obverse knitted fabric and a reverse knitted fabric with connecting yarns so that the connecting yarns form a connecting layer between the obverse knitted fabric and the reverse knitted fabric by use of at least 5 reeds. In the double warp-knitted fabric, total weight is set to 200-400 g/m, total thickness is set to 2.0-6.0 mm, stitch density is set to 900-1300/inchand dtex conversion density of the connecting yarns of the connecting layer is set to 35000-70000 dtex/inch. The single fiber fineness of the connecting yarns is set to 5-40 dtex and the total fineness is set to 10-60 dtex. At least two needle loops are continuously formed on the same wales of the obverse knitted fabric by front yarns and the connecting yarns in at least 2 sequential courses.

Description

  The present invention is laminated as an interior material on the lower ground such as a ceiling ground surface, wall ground surface, floor ground surface, etc., absorbs unevenness present in the ground surface, prepares the ground surface flat, covers the ground surface and softens it. The present invention relates to a cushioning double warp knitted fabric having a cushioning property and a decorative property, which is used for finishing a decorative surface that gives a unique feel.

As this type of interior material, the back surface of the interior fabric has a bulk density of 0.02 to 0.035 g / cm ³ , a thickness of 1 to 5 mm, and a hardness according to the JIS-K-6400-2D method (hereinafter simply referred to as JIS hardness). Also known is a laminate of 50 to 200 N polyurethane foam sheets and fabrics (see, for example, Patent Documents 1 and 2).

In general, in an interior material bonded with polyurethane foam sheet or fabric, it has a multi-layered laminated structure. Due to the difference from the inner diameter, the folded foam is absorbed by the polyurethane foam sheet or fabric, and the appearance of the finished surface on which the interior material is constructed is maintained.
However, in the interior material having a multi-layered structure, since the materials of the respective layers are different, it becomes difficult to separate and collect the materials of the respective layers, which is an obstacle to recycling at the time of disposal.

  Thus, it has been considered to raise a back surface of a warp knitted fabric used as an interior material to form a buffer layer in place of polyurethane foam or fabric (for example, see Patent Document 3).

In the back raised warp knitted fabric (for example, see Patent Document 3), the adhesive applied at the time of bonding to the base surface is likely to ooze out on the surface of the back raised warp knitted fabric, and the oozed adhesive As a result, the aesthetic appearance of the finished surface on which the back brushed warp knitted fabric is bonded is impaired.
In particular, in the ground surface with ups and downs such as entering corners and protruding corners, in order to avoid lifting of the back surface raised warp knitted fabric, it is to be applied while pressing the back surface raised warp knitted fabric against the ground surface for a long time. Therefore, it becomes easy for the adhesive to ooze out to the surface.
In addition, when peeling and removing the back raised warp knitted fabric that has been bonded to the ground surface, the raised fluff is transferred to the ground surface, and then the back brushed warp knitted fabric to be bonded is hindered. Take time to remove and clean.

Thus, it has been considered to use a double warp knitted fabric as an interior material (for example, see Patent Document 4).
However, the double warp knitted fabric constructed by connecting the conventional front knitted fabric and back knitted fabric with connecting yarns has a two-layer structure. In the case of the square ground surface, bending wrinkles are likely to occur due to the difference between the outer diameter and the inner diameter that occur at the bending location during bending, and it is constructed using double warp knitted fabric as the interior material. There was a problem that the aesthetics of the finished surface was damaged.

JP2000-095036 JP2003-245969 JP 2009-214589 A JP 2002-155454 A

  Therefore, the present invention makes the double warp knitted fabric lighter and easier to conform to the base surface to be bonded and has the disadvantage that it becomes lighter, for example, the surface of the surface knitted fabric is likely to generate streaks during knitting. Small unevenness of the lower ground is likely to appear on the surface of the surface knitted fabric, and after installation, it is easy to work on the ground surface, eliminating the inconvenience that the connecting thread is easily scraped to the male surface fastener that is sewn to the clothing. The object of the present invention is to obtain a cushioning double warp knitted fabric that has high concealability with respect to the base surface and is lightweight and has cushioning and male surface fastener properties.

The cushioning double warp knitted fabric according to the present invention is (a) knitted using at least five ridges, the front knitted fabric 21 and the back knitted fabric 26 are connected to the connecting yarn 22, and the front knitted fabric and the back A double warp knitted fabric in which a connecting layer of connecting yarns is formed between the knitted fabrics, (b) the total basis weight of the double warp knitted fabric is 200 to 400 g / m ² , and (c) No. 2 The total thickness of the double warp knitted fabric is 2.0 to 6.0 mm, and (d) the density of the stitch indicated by the product of the course density and the wale density of the front knitted fabric 21, the course density of the back knitted fabric 26 and the wale density. The stitch density indicated by the product is 900-1300 pieces / (25.4 mm) ² , (e) the single fiber fineness of the connecting yarn 22 is 5-40 dtex, and the total fineness of the connecting yarn 22 is 10-60 dtex. (F) The dtex conversion density of the connecting yarn 22 constituting the connecting layer is 35000 to 700. 00dtex / (25.4mm) is ^2, (g) connecting threads 22 forms a needle loop 23 is knitted into Omoteami land 21 forms a needle loop knitted into Urahen land 26, (H) The front knitted fabric 21 includes a first front ridge through which the first front yarn 24a is inserted, a second front heel through which the second front yarn 24b is inserted, and a third third through which the third front yarn 24c is inserted. It is knitted by at least three folds with a front fold, and (i) knitted on a first fold knitted on a first fold, a second knitted yarn knitted on a second fold, and a third fold Two or more needle loops 25a extending over two or more courses on the same wale following the knitting direction of the surface knitted fabric. , 25b, 25c are continuously formed in the knitting direction, and (j) The overlap direction of two or more needle loops 25a, 25b, 25c of the front yarn 24c formed continuously on the same wale of the front knitted fabric and the connection formed integrally with the front yarn 24c The overlap direction of the needle loop 23 of the yarn is the same direction, and (k) a front yarn 24c forming two or more needle loops 25a, 25b, 25c having the same overlap direction in the front knitted fabric The total fineness of the front yarn 24c is larger than the total fineness of the connecting yarn 22, and (l) the single yarn of the surface yarn 24c forming two or more needle loops 25a, 25b, 25c having the same overlap direction on the surface knitted fabric The first characteristic is that the fineness is smaller than the single fiber fineness of the connecting yarn 22.

  A second feature of the buffer double warp knitted fabric according to the present invention is that, in addition to the first feature, the connection layer 22 is formed between the front knitted fabric 21 and the back knitted fabric 26. The specific gravity is 0.005 to 0.03, the hardness according to JIS-K-6400-2D method in the thickness direction of the double warp knitted fabric is 50 to 130 N, and JIS- in the thickness direction of the double warp knitted fabric. The amount of compression deflection by the K-6400-2B method is 1.0-4.0 mm, and the difference between the thickness of the double warp knitted fabric and the amount of compression warp of the double warp knitted fabric in the thickness direction is 0.5- The circumferential surface of the short cylinder is successively 2.0 mm starting from the short cylinder 12g having a large diameter on each circumferential surface of the plurality of short cylinders 12a, 12b, 12c... Double warp knitting by aligning the knitting direction or knitting width direction of the double warp knitted fabric with the circumferential direction of When the fabric 11 is brought into intimate contact, the crease indicated by the radius of curvature of the short cylinder (12c) in which the double warp knitted fabric is in close contact immediately before the short cylinder (12b) in which the crease is first generated in the double warp knitted fabric The minimum generated radius of curvature is 10 mm or less.

  The third feature of the cushioning double warp knitted fabric according to the present invention is that, in addition to any of the first and second features described above, the first knitted fabric in which the first knitted yarn is inserted into the back knitted fabric And a second back hook through which the second back thread is inserted, and the connecting layer is inserted through the first connecting thread through which the first connecting thread is inserted and the second connecting thread. Formed by either one of the two hooks with the second connecting hook or the first connecting hook through which the first connecting thread is inserted and the second connecting hook through which the second connecting thread is inserted. And all the needle loops formed by the back fold are open.

  The fourth feature of the cushioning double warp knitted fabric according to the present invention is that, in addition to any of the first and second features described above, the first knitted fabric in which the back knitted fabric is inserted with the first back yarn And a second back thread through which the second back thread is inserted, and the connection layer is a first connection thread through which the first connection thread is inserted, and a second connection thread. The two connecting rods with the inserted second connecting rod, or the first connecting rod through which the first connecting yarn is inserted and the second connecting rod through which the second connecting yarn is inserted The needle loop formed by any one of the first and second linings, through which any one of the first and second lining yarns knitting the back knitted fabric is formed, becomes an opening In the point.

  The fifth feature of the shock-absorbing double warp knitted fabric according to the present invention is that, in addition to any of the first, second, third and fourth features described above, the swinging of all the ridges knitting the back knitted fabric Is less than one stitch swing.

The double warp knitted fabric of the present invention has a total basis weight of 200 to 400 g / m ² , a total thickness of 2.0 to 6.0 mm, and a stitch density of 900 to 1300 pieces / (25.4 mm) ² . One of the front yarns 24c in which the connecting yarn 22 continuously forms two or more needle loops 25a, 25b, 25c over two or more courses on the same wale following the knitting direction. The needle loop 23 is formed integrally with the needle loop 25 b, and the overlapping direction of the needle loop 25 b of the surface yarn 24 c and the needle loop 23 of the connecting yarn 22 that are integrated with each other is the same in the surface knitted fabric 21. Yes, the single fiber fineness of the connecting yarn 22 that forms a needle loop integrally with the surface yarn 24c is thicker than the single fiber fineness of the surface yarn 24c.
This connecting yarn 22 is in a double warp knitted fabric, and is not a cut pile whose tip is easily pushed down, but a connecting layer in which both ends are locked to the front knitted fabric 21 and the back knitted fabric 26 in the form of both ends supporting beams. And exhibits buffering properties without being pushed down by the pressing force acting on the double warp knitted fabric.

The connecting yarn 22 has a total fineness smaller than that of the front yarn 24 and is knitted into a double warp knitted fabric to form a needle loop. Over the course, two or more needle loops 25a, 25b, 25c are formed as a needle loop integrated with the front yarn 24c, which is continuously formed in the knitting direction, and the two or more needle loops are formed. The needle loops 25a, 25b, and 25c are formed continuously, and the overlap direction of the needle loop 23 of the front yarn 24c and the connecting yarn 22 is the same direction.
As such, since the connecting yarn forms the needle loop 23 a plurality of times and is engaged with the surface knitted fabric 21, the needle loop 23 of the connecting yarn is exposed on the surface of the surface knitted fabric 21. However, it is not easily scraped by being hooked on the male hook of the male hook-and-loop fastener and exhibits male-type hook-and-loop fastener resistance.

On the other hand, the front yarn 24 has a total fineness larger than that of the connecting yarn 22 and a single fiber fineness smaller than that of the connecting yarn 22. Two or more needle loops 25a, 25b, and 25c are formed over two or more courses on the same wale following the knitting direction, and the overlapping direction of the needle loops 23 of the connecting yarns. The direction is the same as the overlap direction.
For this reason, the needle loop 25b of the surface yarn 24c having a thin single fiber fineness is protected by the needle loop 23 of the connecting yarn 22 having a single fiber fineness integrated with the front yarn 24c, and is difficult to be pulled out by the male surface fastener.

In the double warp knitted fabric of the present invention, the specific gravity of the connecting layer is 0.005 to 0.03, the hardness in the thickness direction according to the JIS-K-6400-2D method is 50 to 130 N, and JIS-K -6400-2B method has a compression deflection in the thickness direction of 1.0 to 4.0 mm, and the difference between the thickness and the compression deflection is 0.5 to 2.0 mm. It is hard to be crushed.
On the other hand, in the present invention, the hardness in the thickness direction according to the JIS-K-6400-2D method is 130 N or less, and two or more needle loops of the front yarn formed continuously in the front and back on the same wale of the surface knitted fabric The overlap direction of the needle loops 23 of the connecting yarns 25a, 25b and 25c is made the same direction. Since the knitted fabric 26 is softened and the needle loop of the back knitted fabric is opened instead of closed, the needle loop of the back knitted fabric can be easily opened and closed at the intertwined portion with the connecting layer. It becomes difficult for creases to occur, and the minimum curvature radius of crease occurrence is 10 mm or less, making it easy to obtain a double warp knitted fabric that can be applied in close contact with the undulations of the underlying surface.

It is a perspective view of the knitting structure of the surface yarn of the double warp knitted fabric of the present invention. FIG. 6 is a perspective view of a minimum curvature radius measuring device for warp occurrence of warp knitted fabric.

[Measurement of total fabric weight of double warp knitted fabric]
The total basis weight of the double warp knitted fabric is measured by the JIS-L-1018-8.4.1 method,
The total thickness of the double warp knitted fabric is measured by the JIS-L-1018-8.5.1 method.

[Connected yarn decitex equivalent density of connecting layer]
The bulk density of the connecting layer is a factor that is a clue to know the density of the connecting layer, and is calculated by the mass of the connecting yarn fibers cut from the unit area of the double warp knitted fabric and the thickness of the connecting layer. However, in a double warp knitted fabric having a total thickness of 2 to 6 mm, it is extremely difficult to cut the connecting yarn fibers of the connecting layer. Therefore, in the present invention, the double stitch density (2M) and the total fineness of the connecting yarn ( D) The connected layer decitex density (ρ) represented by the product (M × D) of (dtex) is substituted for the bulk density of the connected layer. Here, the connected yarn decitex equivalent density (ρ) means that all the connected yarn fibers contained in the connected layer of the unit area ([25.4 mm] ² ) of the double warp knitted fabric are aggregated into one thick fiber. The assumed fineness of the single virtual fiber, that is, the fineness of a single virtual connected yarn fiber that can be assumed to be virtual within the unit area ([25.4 mm] ² ) of the connected layer. Means. However, in the present invention, as described above, in a double warp knitted fabric having a total thickness of 2 to 6 mm, it is difficult to say that the connecting yarn fibers of the connecting layer can be cut, but on the other hand, how many fibers are in the total fibers of the connecting yarn. It is almost impossible to know whether or not it remains without being cut.
Therefore, in the present invention, it is assumed that all the fibers of the connecting yarn included in the connecting layer are cut, and all the fibers of the connecting yarn calculated from the total number of fibers of the connecting yarn are one thick virtual. The fineness of the single virtual fiber when aggregated into the fiber, that is, a thick one that can be assumed to be included within the unit area ([25.4 mm] ² ) of the connecting layer of the double warp knitted fabric. The connected yarn decitex equivalent density (ρ) of the connecting layer is calculated based on the fineness of the virtual connecting yarn fiber.
In the calculation of the connected yarn decitex density (ρ), which is a clue to know the density of the connecting layer, the stitch density is doubled (2M) because the connecting yarn is U-shaped and the surface knitted fabric The connecting yarn that is locked to the back knitted fabric and locked to the front knitted fabric and the back knitted fabric to form a U-shape becomes a sinker loop or needle loop. This is because one protrusion (two in total) is projected from both ends of the sunk portion to protrude into the connecting layer.

[Measurement of compression warp of double warp knitted fabric]
The amount of compression deflection in the thickness direction of the double warp knitted fabric is measured by the JIS-K6400-2-B method.

[Measurement of compression hardness of double warp knitted fabric]
The compression hardness in the thickness direction of the double warp knitted fabric is measured by the JIS-K6400-2-D method.

[Measurement of minimum curvature radius of crease generation]
Folding folds having a size of 100 mm in the knitting direction (length direction) and 350 mm in the knitting width direction (width direction) for measuring the minimum curvature radius in the knitting direction (length direction) of the double warp knitted fabric Five test specimens and 350 mm in the knitting direction (length direction) for measuring the minimum curvature radius of crease generation in the knitting width direction (width direction) of the double warp knitted fabric, and 100 mm in the knitting width direction (width direction) Five test pieces for measuring the horizontal crease in the size are collected from the double warp knitted fabric.
In order to measure the minimum radius of curvature r at which creases occur in the double warp knitted fabric, as shown in FIG. 2, a plurality of short cylinders 12a, 12b, 12c, 12d, 12e, 12f, 12g,... Are prepared, and the minimum curvature radius measuring device 14 is prepared by stacking the short cylinders in order of diameter so that the peripheral surfaces of the plurality of short cylinders are in contact with the common contact plane 13, respectively. Observe whether or not creases occur when the test piece 11 of the double warp knitted fabric is in close contact with the peripheral surface of any of the short cylinders 12a, 12b, 12c, 12d, 12e, 12f, 12g, ... The curvature radius of a short cylinder having a curvature radius smaller by one rank than that of the short cylinder in which the crease has occurred is used as the measurement data for the occurrence of crease generation, and is represented by the curvature radius of the short cylinder.
The minimum curvature radius r of the crease generation is determined by the average value of the crease generation measurement data of the five test pieces.

[Male type surface fastener test method]
One specimen having a width of 70 mm and a length of 300 mm is taken from the double warp knitted fabric in the vertical (knitting direction) and horizontal (knitting width direction) directions. A gripping allowance of 40 mm is provided at both ends in the length direction of a 300 mm test piece and held by a clamp, a test space of 220 mm length is secured between the clamps, and the test piece is flat and level with the clamp. Secure on the test table.
A slider that is reciprocated in the length direction of the test piece by the reciprocating crank mechanism is placed on the test space (220 mm in length) of the test piece. A male surface fastener (Quicklon R, standard type, hook A surface, normal type male surface fastener manufactured by YKK) is attached to the contact surface of the slider with the test piece. The load applied from the slider toward the test piece is 9.8 N, the slider stroke (reciprocation distance) is 140 mm, the reciprocation speed of the slider is 60 ± 10 mm / min, and the male surface on the test space of the test piece The fastener is reciprocated five times, and the degree of wear in the test space of the test piece by the male surface fastener is visually evaluated to evaluate the male surface resistance to five levels.
[Evaluation of male type surface fastener]
The male type surface fastener property is evaluated as grade 5 when no trace of rubbing against the male type surface fastener is observed in the test space of the test piece.
Although the trace of rubbing against the male hook-and-loop fastener is recognized in the test space of the test piece, the male-type hook-and-loop fastener resistance is evaluated as grade 4 when no trace of fiber is scraped into the male hook-and-loop fastener. To do.
The male type surface fastener resistance when a raised fuzz having a length of 5 mm or less scraped out by the male type fastener in the test space of the test piece is recognized is evaluated as a third grade.
The male type surface fastener resistance is evaluated as a second grade when a raised fluff having a length of 5 mm or more scraped out by the male type surface fastener is recognized in the test space of the test piece.
In the test space of the test piece, the raised fuzz having a length of 5 mm or more scraped to the male surface fastener is observed, and when the surface knitting structure is broken in the test space of the test piece, the male surface fastener resistance is Evaluate as 1st grade.

When the total thickness of the double warp knitted fabric is 2.0 mm or less, it becomes difficult for the double warp knitted fabric to absorb fine irregularities on the base surface when the double warp knitted fabric is applied to the base surface. When the total thickness is 6.0 mm or more, the uneven curve applied to the base surface is difficult to appear on the surface of the double warp knitted fabric. When the total basis weight of the double warp knitted fabric is less than 200 g / m ^2, it becomes difficult to absorb the fine irregularities on the construction base surface into the double warp knitted fabric, and the total basis weight exceeds 400 g / m ^2. As a result, the result is contrary to the object of the present invention, which is to reduce the weight of the double warp knitted fabric. In consideration of these points, in the present invention, the total basis weight of the double warp knitted fabric is 200 to 400 g / m ² and the total thickness is 2.0 to 6.0 mm.

When the total fineness of the connecting yarn is 60 dtex or more, the double warp knitted fabric is felt to be hard when pressed, and the double warp knitted fabric has a feeling of sinking. On the other hand, when the total fineness of the connecting yarn is less than 10 dtex, the double warp knitted fabric is easily crushed and it is difficult to maintain its thickness. When the single fiber fineness of the connecting yarn is 40 dtex or more, the double warp knitted fabric feels too strong and hard when pressed, and when the single fiber fineness is less than 5 dtex, the amount of compressive deflection (JIS-K-6400- 2B method) is small, and the rebound resilience from the double warp knitted fabric felt when pressing is reduced. Considering these points, in the present invention, the single fiber fineness of the connecting yarn is 5 to 40 dtex, and the total fineness of the connecting yarn is 10 to 60 dtex.
As long as the single fiber fineness of the connecting yarn is 5 to 40 dtex and the total fineness of the connecting yarn is 10 to 60 dtex, the connecting yarn is a monofilament yarn having one single fiber, but the number of single fibers is 2 to 12 The multifilament yarn may be used.

In the present invention, the reason why the connecting yarn is knitted into both the front knitted fabric and the back knitted fabric and the needle loop of the connecting yarn is formed in both the knitted fabric and the back knitted fabric is that the connecting layer formed by the connecting yarn is formed on both the front knitted fabric and the back knitted fabric. This is because when the double warp knitted fabric is firmly bonded and the double warp knitted fabric is pressed, the knitting structure does not collapse between the connecting layer and the front knitted fabric and between the connecting layer and the back knitted fabric, and the cushion function by the connecting layer is enhanced.
In this invention, in order to ensure the cushion function by a connection layer, the dtex conversion density of a connection thread | yarn shall be 35000-70000 dtex / (25.4mm) ² .
That is, in relation to the cushion function by the connecting layer, when the dtex conversion density of the connecting yarn is less than 35000 dtex / (25.4 mm) ² , the connecting layer is too soft and cushioning is not felt, which is 70000 dtex / (25. 4 mm) When ² is exceeded, the connecting layer becomes too hard.

[Example 1]
Six guide bars _{L 1, L 2, L 3} , L 4, L 5, first the guide bar L ₁ single fiber fineness of a double raschel warp knitting machine having a L ₆ 0.6 dtex · total fineness 84dtex polyester crimped multi through the interlaced composite yarn of a polyester non-crimped multifilament yarn of filament yarn and single fiber fineness 2.8dtex · total fineness 33dtex as the first yarn for Omoteami land, the first reed L ₁ knitted pattern / 4-3 / 3-3 / 2-3 / 2-2 / 2-1 / 1-1-1 / 0-1 / 1-1 / 2-1 / 2-2 / 2-3 / 3-3-3 ... The interlaced composite yarn of polyester crimped multifilament yarn having a single fiber fineness of 0.6 dtex / total fineness of 84 dtex and polyester non-crimped multifilament yarn having a single fiber fineness of 2.8 dtex / total fineness of 33 dtex in the _second cocoon L ₂ Table 2 for knitted fabric Through a second reed L ₂ a knitting pattern / 1-0 / 1-1 / 1-2 / 2-2 / 3-2 / 3-3 / 3-4 / 3-3 / 3-2 / 2- 2 / 1-2 / 1-1 / ......... of the operation in the order, the third yarn for Omoteami place the polyester crimped multifilament yarn of the third to the reed L ₃ single fiber fineness 2.3dtex · total fineness 110dtex as through the third reed L ₃ the knitting pattern / 2-1 / 1-1 / 1-2 / 1-1 / 1-0 / 0-0 / 0-1 / 1-1 / 1-0 / 1 1 / 1-2 / 2-2 / ......... manipulated in order, through a fourth reed L ₄ polyester monofilament yarns of a single fiber fineness 22 dtex · total fineness 22 dtex as the connecting yarn, the fourth reed L ₄ knitting pattern / 2-1 / 1-0 / 0-1 / 1-2 / ......... operate in the order of, polyester of single fiber fineness 2.3dtex · total fineness 56dtex to the fifth reed L ₅ Pass the crimped multifilament yarn as the first back yarn for the back knitted fabric, and operate the 5 th heel L _{5 in the order} of the knitting pattern / 1-1 / 2-1 / 1-1 / 0-1 / the sixth reed L ₆ through the polyester crimped multifilament yarn of a single fiber fineness 2.3dtex · total fineness 56dtex as the second back yarn for Urahen place, sixth reed L ₆ a knitting pattern / 1-1 / 0 The wale density is 24 W / 25.4 mm, the course density is 46 C / 25.4 mm, and the stitch density is 1104 pieces / (25.4 mm). ² ), a total thickness according to JIS-L-1018-8.5.1 method is 3.4 mm, and a total basis weight according to JIS-L-1018-8.4.1 method is 325 g / m ² A warp knitted fabric was knitted.

The dtex conversion density of the connecting yarn of the connecting layer of the double warp knitted fabric of Example 1 is 48576 dtex / (25.4 mm) ² , the specific gravity of the connecting layer is 0.008, and JIS-K-6400-2D. The hardness in the thickness direction by the method is 70.2 N, the amount of compressive deflection in the thickness direction by the JIS-K-6400-2B method is 2.3 mm, and the difference between the thickness and the amount of compressive deflection is 1. A double warp knitted fabric having a stiffness of 1 mm and being hard to be crushed was obtained.

  This double warp knitted fabric has a hardness in the thickness direction according to JIS-K-6400-2D of 70.2 N, and both ends are connected to the front knitted fabric and the back knitted fabric in a support beam shape at both ends. Exhibits buffering properties without being pushed down by the pressing force acting on the double warp knitted fabric.

Further, the courses C ₅ , C _7, and C ₉ , and the courses C ₁₁ , C _1, and C ₃ that move back and forth on the same wale in which the third face yarn follows three needle loops in the knitting direction of the surface knitted fabric. In Table 3, the connecting yarn forms a needle loop integrated with the needle loop of the third surface yarn, and the overlap direction forms a needle loop in the same direction. The total fineness of the yarn is 110 dtex, the total fineness of the third surface yarn is thicker than the total fineness of the connecting yarn whose total fineness is 22 dtex, the single fiber fineness of the third surface yarn is 2.3 dtex, and the single fiber fineness The single fiber fineness of the third front yarn is smaller than the single fiber fineness of the connecting yarn of 22 dtex, and the overlapping direction of the needle loop of the third front yarn and the overlapping of the needle loop of the connecting yarn Direction is the same direction Therefore, the needle loop of the third surface yarn is covered with the needle loop of the connection yarn, and the needle loop of the connecting yarn is not easily exposed on the surface of the surface knitted fabric, and is easily scraped by being hooked on the male hook of the male surface fastener. In other words, a double warp knitted fabric having a male-type surface fastener property of grade 4 or higher is obtained.

  The total fineness of the third front yarn forming a needle loop having the same overlap direction is 110 dtex, and the total fineness of the third front yarn is thicker than the total fineness of the connecting yarn having a total fineness of 22 dtex, The single fiber fineness of the third surface yarn is 2.3 dtex, and the single fiber fineness of the third table yarn is smaller than the single fiber fineness of the connecting yarn having the single fiber fineness of 22 dtex. 3. Since the overlap direction of the needle loop of the front yarn and the overlap direction of the needle loop of the connecting yarn are the same direction, the needle loop of the back knitted fabric is opened and closed at the entanglement point with the connecting layer. It is easy and folds do not easily occur on the front knitted fabric, and in particular, all the needle loops formed by the first back yarn and the second back yarn are open, and the first back yarn and the second back yarn Because the swing of the cocoon swings one stitch Te, creases occurred minimum curvature radius of 10mm following 5mm, and the double warp knitting fabric of Example 1 is easily adhered construction to match the relief of the underlying surface.

The following [Table 1] shows the knitting structure of the double warp knitted fabric of Example 1, and the knitting specifications of the double warp knitted fabric of Example 1 are collectively shown in [Table 7]. The physical property quality of the warp knitted fabric is summarized in [Table 8].
In [Table 1], the overlap direction of the needle loop of the third front yarn and the overlap direction of the needle loop of the connecting yarn in the course C ₇ and the course C ₁ are indicated by symbols L and R and arrows. ing.
1 is a partially enlarged perspective view of the double knitted fabric of Example 1 as seen from the surface of the front knitted fabric.

[Example 2]
Five reed _{L 1, L 2, L 3} , L 4, L 5 to the first reed L ₁ double raschel warp knitting machine having a polyester crimped multifilament yarn of single fiber fineness 1.2 dtex · total fineness 84dtex through a first yarn for fabric Omoteami, the first reed L ₁ knitting pattern / 1-0 / 1-1 / 1-2 / 2-2 / 2-3 / 2-2 / 2-1 / 1 1 / ......... operate in the order of, through to the second reed L ₂ a polyester crimped multifilament yarn of a single fiber fineness 1.2dtex · total fineness 84dtex as the second yarn for Omoteami land, the second reed L ₂ to the knitting pattern / 4-5 / 3-3 / 2-1 / 1-1 / 1-0 / 2-2 / 3-4 / 4-4 / ......... operated in this order, the third reed L ₃ through the polyester crimped multifilament yarn of a single fiber fineness 1.2dtex · total fineness 84dtex as a third yarn for Omoteami land, the third reed L ₃ ed. Turn / 0-1 / 1-1 / 1-0 / 0-0 / ......... of manipulating sequentially, through a fourth reed L ₄ polyester monofilament yarns of a single fiber fineness 22 dtex · total fineness 22 dtex as the connecting yarn, The fourth rod L ₄ is operated in the order of the knitting pattern / 1-2 / 1-0 / 1-0 / 1-2 /..., And the fifth rod L ₅ has a single fiber fineness of 2.3 dtex and a total fineness of 110 dtex. the polyester crimped multifilament yarn through as a back yarn for Urahen land, operate the fifth reed L ₅ in the order of the knitting pattern / 3-3 / 4-3 / 1-1 / 0-1 / ........., wale The density is 25 W / 25.4 mm, the course density is 45 C / 25.4 mm, the stitch density is 1125 pieces / (25.4 mm) ² , and the total according to JIS-L-1018-8.5.1 method Thickness is 2.4 mm, JIS-L-1018-8.4.1 The total weight per unit area due to have organized a double warp knitted fabric of 240g / m ^2.

The dtex conversion density of the connecting yarn of the connecting layer of the double warp knitted fabric of Example 2 is 49500 dtex / (25.4 mm) ² , the specific gravity of the connecting layer is 0.008, and JIS-K-6400-2D. The hardness in the thickness direction according to the method is 69.5 N, the amount of compressive deflection in the thickness direction according to the JIS-K-6400-2B method is 1.6 mm, and the difference between the thickness and the amount of compressive deflection is 0. A double warp knitted fabric having a stiffness of 8 mm and not easily crushed was obtained.

  This double warp knitted fabric has a hardness of 69.5N in the thickness direction according to the JIS-K-6400-2D method, and both ends are connected to the front knitted fabric and the back knitted fabric in the form of both-end support beams. Exhibits buffering properties without being pushed down by the pressing force acting on the double warp knitted fabric.

Further, the third surface yarn is formed continuously in the courses C ₁ , C ₃ , C ₅ , and C ₇ of the whole cycle that goes back and forth on the same wale following the knitting direction of the surface knitted fabric, and the connecting yarn Forms a needle loop integrated with the needle loop of the third surface yarn, and the total fineness of the third surface yarn forming the needle loop whose overlap direction is the same direction is 84 dtex, The total fineness of the third surface yarn is larger than the total fineness of the connecting yarn of 22 dtex, the single fiber fineness of the third surface yarn is 1.2 dtex, and the single fiber fineness of the connecting yarn of 22 dtex is larger than the single fiber fineness of the connecting yarn The single fiber fineness of the 3rd table yarn is thin, so the overlap direction of all needle loops of the 3rd table yarn and the overlap direction of all needle loops of the connecting yarn are the same direction. So that 3 Covered by the needle loop of the front yarn, the needle loop of the connecting yarn is hard to be exposed on the surface of the surface knitted fabric, and is not easily scraped out by being hooked on the male hook of the male hook and loop fastener. A double warp knitted fabric having a surface fastener property of grade 4 or higher is obtained.

  And the total fineness of the 3rd table yarn in which the overlap direction forms the needle loop of the same direction is 84 dtex, and the total fineness of the 3rd table yarn is thicker than the total fineness of the connecting yarn whose total fineness is 22 dtex, The single fiber fineness of the third surface yarn is 1.2 dtex, and the single fiber fineness of the third surface yarn is smaller than the single fiber fineness of the connecting yarn having the single fiber fineness of 22 dtex. 3. Since the overlap direction of all needle loops of the front yarn and the overlap direction of all needle loops of the connecting yarn are the same direction, the needle loop of the back knitted fabric at the entanglement point with the connecting layer The front knitted fabric is easy to open and close, and it is difficult for creases to occur on the front knitted fabric. In particular, all the needle loops formed by the back yarn are open and the back knitted fabric is inserted through the first back yarn. It is organized by a single cocoon And since, creases occurred minimum curvature radius of 10mm following 5mm, and the undulating double warp knitted fabric easy close contact construction to match the underlying surface is obtained.

The following [Table 2] shows the knitting structure of the double warp knitted fabric of Example 2, and the knitting specifications of the double warp knitted fabric of Example 2 are collectively shown in [Table 7]. The physical property quality of the warp knitted fabric is summarized in [Table 8].
[Table 2] includes the overlap direction of the needle loop of the third face yarn and the overlap direction of the needle loop of the connecting thread in the courses C ₁ , C ₃ , C ₅ and C ₇ of the entire knitting period of the front knitted fabric. Are indicated by symbols L and R and arrows.

[Example 3]
Five reed _{L 1, L 2, L 3} , L 4, L 5 to the first reed L ₁ double raschel warp knitting machine having a polyester crimped multifilament yarn of single fiber fineness 1.2 dtex · total fineness 84dtex through a first yarn for fabric Omoteami, the first reed L ₁ knitting pattern / 1-0 / 2-2 / 3-4 / 4-4 / 4-5 / 3-3 / 2-1 / 1 1 / ......... operate in the order of, through to the second reed L ₂ a polyester crimped multifilament yarn of a single fiber fineness 1.2dtex · total fineness 84dtex as the second yarn for Omoteami land, the second reed L ₂ to the knitting pattern / 4-5 / 3-3 / 2-1 / 1-1 / 1-0 / 2-2 / 3-4 / 4-4 / ......... operated in this order, the third reed L ₃ through the polyester crimped multifilament yarn of a single fiber fineness 1.2dtex · total fineness 84dtex as a third yarn for Omoteami land, the third reed L ₃ ed. Turn / 0-1 / 1-1 / 1-0 / 0-0 / ......... of manipulating sequentially, through a fourth reed L ₄ polyester monofilament yarns of a single fiber fineness 22 dtex · total fineness 22 dtex as the connecting yarn, The fourth rod L ₄ is operated in the order of the knitting pattern / 1-2 / 1-0 / 1-0 / 1-2 /..., And the fifth rod L ₅ has a single fiber fineness of 3.5 dtex and a total fineness of 167 dtex. the polyester crimped multifilament yarn through as a back yarn for Urahen land, operate the fifth reed L ₅ in the order of the knitting pattern / 2-2 / 3-2 / 1-1 / 0-1 / ........., wale The density is 25 W / 25.4 mm, the course density is 50 C / 25.4 mm, the stitch density is 1250 pieces / (25.4 mm) ² , and the total according to JIS-L-1018-8.5.1 method Thickness is 3.0mm, JIS-L-1018-8.4.1 The total weight per unit area due to have organized a double warp knitted fabric of 310g / m ^2.

The dtex conversion density of the connecting yarn of the connecting layer of the double warp knitted fabric of Example 3 is 55000 dtex / (25.4 mm) ² , the specific gravity of the connecting layer is 0.009, and JIS-K-6400-2D. The hardness in the thickness direction by the method is 127.4 N, the amount of compressive deflection in the thickness direction by the JIS-K-6400-2B method is 1.9 mm, and the difference between the thickness and the amount of compressive deflection is 1. A double warp knitted fabric having a stiffness of 1 mm and being hard to be crushed was obtained.

  This double warp knitted fabric has a hardness in the thickness direction of 127.4N according to the JIS-K-6400-2D method, and both ends are connected to the front knitted fabric and the back knitted fabric in a support beam shape at both ends. Exhibits buffering properties without being pushed down by the pressing force acting on the double warp knitted fabric.

Further, the third surface yarn is formed continuously in the courses C ₁ , C ₃ , C ₅ , and C ₇ of the whole cycle that goes back and forth on the same wale following the knitting direction of the surface knitted fabric, and the connecting yarn Forms a needle loop integrated with the needle loop of the third surface yarn, and the total fineness of the third surface yarn forming the needle loop whose overlap direction is the same direction is 84 dtex, The total fineness of the third surface yarn is larger than the total fineness of the connecting yarn of 22 dtex, the single fiber fineness of the third surface yarn is 1.2 dtex, and the single fiber fineness of the connecting yarn of 22 dtex is larger than the single fiber fineness of the connecting yarn The single fiber fineness of the 3rd table yarn is thin, and the overlap direction of the needle loop of the 3rd table yarn and the overlap direction of the needle loop of the connecting yarn are the same direction. Table 3 D The needle loop of the connecting yarn is not easily exposed on the surface of the surface knitted fabric because it is covered with the dollar loop, and it is not easily scraped by being hooked on the male hook of the male hook and loop fastener. A double warp knitted fabric of grade or higher is obtained.

  And the total fineness of the 3rd table yarn in which the overlap direction forms the needle loop of the same direction is 84 dtex, and the total fineness of the 3rd table yarn is thicker than the total fineness of the connecting yarn whose total fineness is 22 dtex, The single fiber fineness of the third surface yarn is 1.2 dtex, and the single fiber fineness of the third surface yarn is smaller than the single fiber fineness of the connecting yarn having the single fiber fineness of 22 dtex. 3. Since the overlap direction of the needle loop of the front yarn and the overlap direction of the needle loop of the connecting yarn are the same direction, the needle loop of the back knitted fabric is opened and closed at the entanglement point with the connecting layer. It is easy and folds do not easily occur on the front knitted fabric. In particular, all needle loops formed by the back yarn are open, and the back knitted fabric is one of the first back knitted yarns through which the first back yarn is inserted. Because it is organized by a piece of firewood , Creases occurred minimum curvature radius of 10mm following 5mm, and the undulating double warp knitted fabric easy close contact construction to match the underlying surface is obtained.

The following [Table 3] shows the knitting structure of the double warp knitted fabric of Example 3, and the knitting specifications of the double warp knitted fabric of Example 3 are collectively shown in [Table 7]. The physical property quality of the warp knitted fabric is summarized in [Table 8].
In [Table 3], the needle loop overlap direction of the third face yarn and the overlap direction of the needle loop of the connecting yarn in the courses C ₁ , C ₃ , C ₅ , C ₇ of the entire knitting period of the surface knitted fabric , L and R are indicated by arrows.

[Comparative Example 1]
Six guide bars _{L 1, L 2, L 3} , L 4, L 5, first the guide bar L ₁ single fiber fineness of a double raschel warp knitting machine having a L ₆ 3.5 dtex · total fineness 167dtex polyester crimped multi through filament yarn as the first yarn for Omoteami locations, first guide bar L ₁ a knitting pattern / 4-5 / 4-4 / 3-2 / 3-3 / 4-5 / 3-3 / 2-3 / 1-1 / 1-0 / 1-1 / 2-3 / 2-2 / 1-0 / 2-2 / 3-2 / 4-4 / ......... operated in this order, the second reed L ₂ in through the polyester crimped multifilament yarn of a single fiber fineness 3.5dtex · total fineness 167dtex as the second yarn for Omoteami place, the second reed L ₂ knitted pattern / 1-0 / 1-1 / 2-3 / 2-2 / 1-0 / 2-2 / 3-2 / 4-4 / 4-5 / 4-4 / 3-2 / 3-3-3 / 4-5 / 3-3-3 / 2-3 / 1 Operate in the order of -1 / ... Third reed L ₃ through the polyester crimped multifilament yarn of single fiber fineness 2.3Dtex · total fineness 110dtex as a first connecting yarns, the third reed L ₃ knitting pattern / 0-0 / 0-1 / 1 operated in the order of 1 / 1-0 / ........., fourth reed L ₄ through a polyester crimped multifilament yarn of single fiber fineness 0.8 dtex · total fineness 110dtex as a second connecting thread, the fourth reed L ₄ Are manipulated in the order of knitting pattern / 0-1 / 1 / 1-1-0 / 0-0 / ..., and the fifth crimped L ₅ has a single-filament fineness of 3.1 dtex and a total fineness of 110 dtex, a polyester crimped multifilament yarn threading a first plating yarn for Urahen locations, operating the fifth reed L ₅ in the order of the knitting pattern / 0-0 / 0-1 / 1-1 / 1-0 / ........., sixth reed L ₆ for a single-fiber fineness 3.5dtex · total fineness 167dtex polyester crimped Through multifilament yarns as a second plating yarn for Urahen locations, by operating the sixth reed L ₆ in the order of knitting patterns / 3-3 / 4-3 / 1-1 / 0-1 / ........., wale density Is 24 W / 25.4 mm, the course density is 35 C / 25.4 mm, the stitch density is 840 pieces / (25.4 mm) ² , and the total thickness according to JIS-L-1018-8.5.1 method Was 1.9 mm, and a double warp knitted fabric having a total basis weight of 481 g / m ² according to JIS-L-1018-8.4.1 was knitted.

The dtex conversion density of the connecting yarn of the connecting layer of the double warp knitted fabric of Comparative Example 1 is 92400 dtex / (25.4 mm) ² , the specific gravity of the connecting layer is 0.013, and JIS-K-6400-2D. The hardness in the thickness direction by the method is 206.3 N, the amount of compressive deflection in the thickness direction by the JIS-K-6400-2B method is 0.8 mm, and the difference between the thickness and the amount of compressive deflection is 1. A double warp knitted fabric having a thickness of 1 mm and feeling firm and firm.

  However, in this double warp knitted fabric, the first connecting yarn forms a needle loop integrated with the first back yarn and the second back yarn in the back knitted fabric, but in the front knitted fabric the first front yarn The needle loop integrated with any of the yarn and the second front yarn is not formed. Therefore, the first connecting yarn is not exposed on the surface of the front knitted fabric, and the second connecting yarn is formed on the front knitted fabric. In the back knitted fabric, a needle loop integrated with both the first back yarn and the second back yarn is formed. Therefore, the second connecting yarn is not exposed on the surface of the back knitted fabric, but only the sinker loop of the first connecting yarn forming the needle loop in the back knitted fabric and the needle loop in the front knitted fabric. The sinker loop of the second connecting yarn forming the front knitted fabric and the back knitted fabric Entangled engagement between the connecting layer is formed between the Omoteami locations and Urahen locations by first connecting thread and the second connecting yarn sinker loops that confounding-engagement.

  As such, neither the first connecting yarn nor the second connecting yarn directly connects the front knitted fabric and the back knitted fabric, and the second connecting yarn forming the needle loop in the front knitted fabric is the back knitted fabric. Since the double warp knitted fabric of Comparative Example 1 is in a state of being lifted from the ground, the total thickness is 1.9 mm, which is 2.0 mm or less, and the lower ground when the double warp knitted fabric is applied to the ground surface is fine. Absorption by the uneven double warp knitted fabric becomes difficult.

  The following [Table 4] shows the knitting structure of the double warp knitted fabric of Comparative Example 1, and the knitting specifications of the double warp knitted fabric of Comparative Example 1 are collectively shown in [Table 7]. The physical property quality of the warp knitted fabric is summarized in [Table 8].

[Comparative Example 2]
Six guide bars _{L 1, L 2, L 3} , L 4, L 5, first the guide bar L ₁ single fiber fineness of a double raschel warp knitting machine having a L ₆ 0.6 dtex · total fineness 84dtex polyester crimped multi through the interlaced composite yarn of a polyester non-crimped multifilament yarn of filament yarn and single fiber fineness 2.8dtex · total fineness 33dtex as the first yarn for Omoteami land, the first reed L ₁ knitted pattern / 4-3 / 3-3 / 2-3 / 2-2 / 2-1 / 1-1-1 / 0-1 / 1-1 / 2-1 / 2-2 / 2-3 / 3-3-3 ... The interlaced composite yarn of polyester crimped multifilament yarn having a single fiber fineness of 0.6 dtex / total fineness of 84 dtex and polyester non-crimped multifilament yarn having a single fiber fineness of 2.8 dtex / total fineness of 33 dtex in the _second cocoon L ₂ Table 2 for knitted fabric Through a second reed L ₂ a knitting pattern / 1-0 / 1-1 / 1-2 / 2-2 / 3-2 / 3-3 / 3-4 / 3-3 / 3-2 / 2- 2 / 1-2 / 1-1 / ......... of the operation in the order, the third yarn for Omoteami place the polyester crimped multifilament yarn of the third to the reed L ₃ single fiber fineness 2.3dtex · total fineness 110dtex The third heel L ₃ is operated in the order of the knitting pattern / 1-0 / 1-1-1 / 1-2 / 1..., And the fourth heel L ₄ has a single fiber fineness 22 dtex and a total fineness 22 dtex. through a polyester monofilament as a connecting yarn, the fourth reed L ₄ operates in the order of knitting patterns / 2-1 / 1-0 / 0-1 / 1-2 / ........., single fifth reed L ₅ the polyester crimped multifilament yarns of fiber fineness 2.3dtex · total fineness 56dtex through as the first back yarn for Urahen land, fifth reed L ₅ Operated in the order of knitting patterns / 1-1 / 2-1 / 1-1 / 0-1 / ........., polyester crimped multifilament yarn of single fiber fineness 2.3Dtex · total fineness 56dtex Sixth reed L ₆ Is operated as the second back yarn for the back knitted fabric, and the sixth heel L ₆ is operated in the order of the knitting pattern / 1-1 / 0-1 / 1-1 / 2-1 /..., And the wale density is 24 W / It is 25.4 mm, the course density is 47 C / 25.4 mm, the stitch density is 1128 pieces / (25.4 mm) ² , and the total thickness according to the JIS-L-1018-8.5.1 method is 2. A double warp knitted fabric having a total weight of 318 g / m ² according to the JIS-L-1018-8.4.1 method was knitted.

The dtex conversion density of the connecting yarn of the connecting layer of the double warp knitted fabric of Comparative Example 2 is 49632 dtex / (25.4 mm) ² , the specific gravity of the connecting layer is 0.009, and JIS-K-6400-2D. The hardness in the thickness direction by the method is 67N, the amount of compressive deflection in the thickness direction by the JIS-K-6400-2B method is 2.1 mm, and the difference between the thickness and the amount of compressive deflection is 0.8 mm. Yes, a double warp knitted fabric that was firm and difficult to be crushed was obtained.

In this double warp knitted fabric, any of the courses C ₁ , C ₁ of the knitting cycle in which all the front yarns of the first front yarn, the second front yarn and the third front yarn pass through the needle loop in the knitting direction of the front knitted fabric. ₃ , C ₅ , C ₇ , C ₉ , C ₁₁ are also formed by moving in the course direction, and their needle loops are not continuous between courses on the same wale before and after, When the surface is rubbed against the male hook of the male hook-and-loop fastener, the fibers are scraped by the concentrated stress from the male hook on the individual needle loops of the surface yarn that are not continuous but individual. It is difficult to obtain a double warp knitted fabric excellent in male-type surface fastener properties.

And the 1st table yarn and 2nd table which comprise the table knitted fabric so that it may display with the code | symbol L * R and the arrow in [Table 5] which shows the knitting structure of the double warp knitted fabric of the comparative example 2 Since the overlap directions in all the courses C ₁ , C ₃ , C ₅ , C ₇ , C ₉ , C ₁₁ of the yarn, the third table yarn and the connecting yarn are the same for each course, the wale direction And the bendability in the course direction are different, and the minimum curvature radius of crease generation is 10 mm or less in both the wale direction and the course direction, and it is difficult to obtain a double warp knitted fabric that can be easily applied in close contact with the undulations of the base surface.

  The following [Table 5] shows the knitting structure of the double warp knitted fabric of Comparative Example 2, and the knitting specifications of the double warp knitted fabric of Comparative Example 2 are collectively shown in [Table 7]. The physical property quality of the warp knitted fabric is summarized in [Table 8].

[Comparative Example 3]
Six guide bars _{L 1, L 2, L 3} , L 4, L 5, first the guide bar L ₁ single fiber fineness of a double raschel warp knitting machine having a L ₆ 0.8 dtex · total fineness 110dtex polyester crimped multi The filament yarn is passed as the first surface yarn for the surface knitted fabric, and the first heel L ₁ is knitted pattern / 1-0 / 1-1 / 1-2 / 2-2 / 2-3 / 2-2 / 2-1. / 1-1 / ......... operate in the order of, through to the second reed L ₂ a polyester crimped multifilament yarn of a single fiber fineness 0.8dtex · total fineness 110dtex as the second yarn for Omoteami land, the second the reed L ₂ operates in the order of knitting patterns / 4-5 / 3-3 / 2-1 / 1-1 / 1-0 / 2-2 / 3-4 / 4-4 / ........., third reed to L ₃ through the polyester crimped multifilament yarn of a single fiber fineness 0.8dtex · total fineness 110dtex as a third yarn for Omoteami land, the Operating the reed L ₃ in the order of the knitting pattern / 0-1 / 1-1 / 1-0 / 0-0 / ........., a polyester monofilament yarn of the fourth to the reed L ₄ single fiber fineness 33dtex · total fineness 33dtex As a connecting thread, the 4th rod L ₄ is operated in the order of the knitting pattern / 1-2 / 1-0 / 1-0 / 1-2 /..., And the 5th rod L ₅ has a single fiber fineness of 2.3 dtex. -A polyester crimped multifilament yarn having a total fineness of 84 dtex is passed as the first back yarn for the back knitted fabric, and the fifth heel L ₅ is passed through the knitting pattern / 1-1 / 1-0 / 0-0 / 0-1 / ... and operation ... in the order of, the sixth reed L ₆ through the polyester crimped multifilament yarn of a single fiber fineness 2.3dtex · total fineness 84dtex as the second back yarn for Urahen place, the sixth reed L ₆ knitted pattern / Operate in the order of 1-1 / 1-0 / 2-2 / 2-3 / ... and the wale density is 2. 3W / 25.4mm, the course density is 51C / 25.4mm, the stitch density is 1173 / (25.4mm) ² , and the total thickness according to JIS-L-1018-8.5.1 method is A double warp knitted fabric with a total basis weight of 349 g / m ² according to JIS-L-1018-8.4.1 method was knitted.

The dtex conversion density of the connecting yarn of the connecting layer of the double warp knitted fabric of Comparative Example 3 is 77418 dtex / (25.4 mm) ² , the specific gravity of the connecting layer is 0.013, and JIS-K-6400-2D. The hardness in the thickness direction by the method is 135 N, the amount of compressive deflection in the thickness direction by the JIS-K-6400-2B method is 2.3 mm, and the difference between the thickness and the amount of compressive deflection is 1.3 mm. Yes, a double warp knitted fabric that was firm and difficult to be crushed was obtained.

In this double warp knitted fabric, the first face yarn and the second face yarn move in the course direction in all the courses C ₁ , C ₃ , C ₅ , and C ₇ to form a needle loop on the face knitted fabric. These needle loops are not continuous between courses that run back and forth on the same wale.
The third table yarn does not move in the course direction in any of the courses C ₁ , C ₃ , C ₅ , C ₇ in the whole period, and the same wale in all the periods from the course C ₁ to the course C _7. A continuous needle loop is formed on the upper side, and the overlap direction of the needle loop formed by the third surface yarn and the needle loop formed by the connecting yarn is determined by the courses C ₁ , C ₃ , C ₅ , C _In both cases, the direction is the same, and the male warp surface fastener property of the double warp knitted fabric of Comparative Example 3 is superior to the double warp knitted fabric of Comparative Example 2.

However, the first back yarn forming the back knitted fabric forms an open needle loop in all the courses C ₂ , C ₄ , C ₆ , and C ₈ of the back knitted fabric. Since the yarn forms closed needle loops in all the courses C ₂ , C ₄ , C ₆ , and C ₈ of the back knitted fabric, the double warp knitted fabric of Comparative Example 3 generates creases. The minimum curvature radius is 10 mm or more, and lacks flexibility as compared with the double warp knitted fabrics of Examples 1 to 3 of the present invention as well as the double warp knitted fabrics of Comparative Examples 1 and 2. It becomes difficult to make close contact with the undulations.

  The following [Table 6] shows the knitting structure of the double warp knitted fabric of Comparative Example 3, and the knitting specifications of the double warp knitted fabric of Comparative Example 3 are collectively shown in [Table 7]. The physical property quality of the warp knitted fabric is summarized in [Table 8].

[Evaluation]
As apparent from the comparison between Examples 1 to 3 and Comparative Examples 1 to 3, in the present invention, in particular, (1) the first front hook through which the first front yarn is inserted and the insertion of the second front yarn And knitting a surface knitted fabric with at least three heels of the second heel that has been inserted and the third heel that has been inserted through the third face yarn, (2)
Two or more needle loops in the knitting direction over two or more courses on the same wale following the knitting direction of the surface knitted fabric, with the surface yarn knitted into at least one of the three heels (3) Overlapping directions of two or more needle loops of the front yarn formed continuously on the same wale of the front knitted fabric and the front yarn are integrated. The overlapping direction of needle loops of the connecting yarns to be formed is the same direction. (4) The total fineness of the surface yarns forming two or more needle loops with the same overlapping direction on the surface knitted fabric is connected. It is thicker than the total fineness of the yarn. (5) The single fiber fineness of the surface yarn forming two or more needle loops having the same overlap direction on the surface knitted fabric is set to be larger than the single fiber fineness of the connecting yarn. Narrow, (6 Since the needle loops of all the back yarns forming the knitted fabric are opened, the male hooks of the male hook and loop fasteners do not scrape the fibers easily and have excellent male hook and loop fastener resistance. In addition, a double warp knitted fabric that has a minimum curvature radius of crease generation of 10 mm or less and can be easily applied in close contact with the undulations of the base surface is obtained.

  The shock-absorbing double warp knitted fabric of the present invention can be used as a chair upholstery, a flooring material, a wall upholstery, a building material cover, and a mount cover.

11: Buffer raised warp knitted fabric test piece 12: Short cylinder 13: Common contact plane 14: Fold wrinkle generation minimum curvature radius measuring instrument 21: Front knitted fabric 22: Connecting yarn 23: Needle loop 24 of connecting yarn: Front yarn 25 : Needle loop 26 of the front yarn: Back knitted fabric

Claims (5)

(A) Knitted using at least five ridges, the front knitted fabric and the back knitted fabric are connected to the connecting yarn, and a connecting layer is formed between the front knitted fabric and the back knitted fabric by the connecting yarn. A heavy warp knitted fabric,
(B) The total basis weight of the double warp knitted fabric is 200 to 400 g / m ² ;
(C) The total thickness of the double warp knitted fabric is 2.0 to 6.0 mm,
(D) The stitch density indicated by the product of the course density and the wale density of the front knitted fabric and the stitch density indicated by the product of the course density and the wale density of the back knitted fabric is 900 to 1300 pieces / (25.4 mm) ² . ,
(E) The single fiber fineness of the connecting yarn is 5 to 40 dtex, the total fineness of the connecting yarn is 10 to 60 dtex,
(F) The dtex equivalent density of the connecting yarn constituting the connecting layer is 35000-70000 dtex / (25.4 mm) ² ,
(G) The connecting yarns are knitted into the front knitted fabric and the back knitted fabric to form needle loops, respectively.
(H) The front knitted fabric is composed of a first front hook through which the first front yarn is inserted, a second front hook through which the second front yarn is inserted, and a third front hook through which the third front yarn is inserted. It is organized by at least three kites,
(I) At least one of the first face yarn knitted on the first face heel, the second face yarn knitted on the second face heel, and the third face yarn knitted on the third face heel The front yarn to be knitted continuously forms two or more needle loops back and forth in the knitting direction over two or more courses on the same wale following the knitting direction of the front knitted fabric,
(J) Overlap direction of two or more needle loops of the front yarn formed continuously in the front and back on the same wale of the front knitted fabric, and the needle loop of the connecting yarn formed integrally with the front yarn The overlap direction is the same direction,
(K) In the knitted fabric, the total fineness of the surface yarn forming two or more needle loops having the same overlap direction is thicker than the total fineness of the connecting yarn,
(L) A cushioning double warp knitted fabric in which the single fiber fineness of the surface yarn forming two or more needle loops having the same overlap direction in the surface knitted fabric is smaller than the single fiber fineness of the connecting yarn. (M) The specific gravity of the connecting layer formed by the connecting yarn between the front knitted fabric and the back knitted fabric is 0.005 to 0.03,
(N) The hardness according to the JIS-K-6400-2D method in the thickness direction of the double warp knitted fabric is 50 to 130 N,
(O) The amount of compressive deflection by the JIS-K-6400-2B method in the thickness direction of the double warp knitted fabric is 1.0 to 4.0 mm,
(P) The difference between the thickness of the double warp knitted fabric and the amount of compressive deflection of the double warp knitted fabric in the thickness direction is 0.5 to 2.0 mm,
(Q) The knitting direction or knitting of the double warp knitted fabric is sequentially performed in the circumferential direction of the circumferential surface of the short cylinder, starting from the short cylinder having a large diameter, on each circumferential surface of a plurality of short cylinders having different diameters in stages. When the double warp knitted fabrics are brought into close contact with each other in the width direction, the crease is first indicated by the radius of curvature of the short cylinders brought into close contact with the double warp knitted fabrics immediately before the short cylinders generated in the double warp knitted fabrics. The shock-absorbing double warp knitted fabric according to claim 1, which has a minimum curvature radius of 10 mm or less. (R) The knitted fabric is knitted by two folds of a first lining with the first lining thread inserted and a second lining with the second lining thread inserted;
(S) The connecting layer has two hooks of the first connecting rod through which the first connecting yarn is inserted and the second connecting rod through which the second connecting yarn is inserted, or the first connecting yarn is inserted Formed by any one of the first connecting rod and the second connecting rod inserted with the second connecting thread,
(T) The shock-absorbing double warp knitted fabric according to any one of claims 1 and 2, wherein all needle loops formed by the back heel are open. (U) the back knitted fabric is knitted by any one of the first heels through which the first back thread is inserted and the second linings through which the second back thread is inserted;
(V) The connecting layer has two hooks, a first connecting rod through which the first connecting yarn is inserted and a second connecting rod through which the second connecting yarn is inserted, or the first connecting yarn is inserted. Formed by any one of the first connecting rod and the second connecting rod inserted with the second connecting thread,
(W) The needle loop formed by any one of the first and second back hooks through which any one of the first and second back yarns knitting the back knitted fabric is formed as an opening. The shock-absorbing double warp knitted fabric according to any one of claims 1 and 2. (X) The shock-absorbing double warp knitting according to any one of claims 1, 2, 3, and 4, wherein swings of all the reeds knitting the knitted fabric are less than one stitch. Fabric.

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