JP5465901B2 - 3D structure knitted fabric - Google Patents

Description

  The present invention is excellent in cushioning and compression recovery properties, various chairs (office chairs, wheelchairs, folding chairs, nursing chairs, etc.), various beds (nursing beds, bedclothes beds, etc.), various vehicle seats (automobiles). The present invention relates to a three-dimensional knitted fabric used for a seat such as a seat for a train or a train.

Conventionally, urethane foam has been mainly used as a cushion material for various chairs and seats.
However, urethane foam has various problems such as difficulty in handling chemicals used during production, generation of toxic gas when disposed of, and difficulty in recycling.

Therefore, in recent years, cloth has come to be used as a cushioning material instead of urethane foam.
For example, Patent Document 1 discloses a mesh ground composed of warp yarns having high tension, and weft yarns in which a required number of elastic yarns and molding yarns are alternately arranged as mesh fabrics to be stretched on a chair frame. Has been.

The mesh ground disclosed in Patent Document 1 has a high tension in the vertical direction of the backrest portion when stretched on the backrest portion of the chair frame, and has a stretchability in the left-right direction perpendicular thereto. Therefore, it is said that a good sitting comfort can be obtained.
However, the mesh ground disclosed in Patent Document 1 is inferior in cushioning properties and compression recovery properties, and when seated, the mesh ground feels hard and gives a feeling of bottoming.
In general, increasing the amount of elastic yarn contained in the fabric improves stretchability, cushioning recovery, etc., but the fabric becomes harder and feels inferior to fabrics that do not use elastic yarn. There was a problem.
Further, if the amount of elastic yarn used is reduced in order to improve the texture, there is a problem that sufficient stretchability and cushioning recoverability cannot be obtained.

Japanese Patent No. 4061167

  The present invention has been made in view of such a current situation, and an object of the present invention is to obtain a good cushioning property and an excellent texture, and as various seat materials, particularly a chair frame. It is an object of the present invention to provide a three-dimensional structure knitted fabric that can give a good sitting comfort without a feeling of bottoming when installed and used.

  As a result of intensive studies, the inventors of the present invention have included a polyester monofilament elastic yarn in any one of the surface structure or the lining structure among the surface structure, the lining structure, and the connecting portion constituting the three-dimensional knitted fabric, and the thickness, By adjusting the total fineness, compression work (WC) and compression resilience (RC) of the connecting yarns, it has been found that a three-dimensional structure knitted fabric having good cushioning properties and no bottoming can be obtained. The present invention has been completed.

That is, the present invention is a three-dimensional structure knitted fabric composed of a surface structure, a lining structure and a connecting portion, and polyester monofilament elastic yarn is inserted and knitted into either the surface structure or the lining structure of the knitted fabric. The knitted fabric has (a) a thickness of 2.0 to 7.0 mm, (b) a total fineness of the connecting yarn of 7920 to 495,000 dtex / (2.54 cm) ² , and (c) the knitted fabric. The compression work (WC) when a load of 50 gf / cm ² is applied at a speed of 1 mm / sec in the thickness direction is 10.0 or more, and (d) a load of 50 gf / cm ² is applied at a speed of 1 mm in the thickness direction of the knitted fabric. It is a three-dimensional structure knitted fabric characterized by having a compression resilience (RC) of 40.0 or more when applied at / sec.

  The polyester monofilament elastic yarn preferably has a bulk density of 3000 to 15000 dtex / cm.

  Moreover, it is preferable that the polyester monofilament elastic yarn is under-wrapped between 3 to 12 needles and inserted and knitted into the ground structure.

  According to the present invention, desired cushioning properties can be obtained, and the texture is excellent, and when used as a variety of seat materials, particularly on a chair frame, there is no feeling of bottoming and a good sitting comfort. A three-dimensional structure knitted fabric that can be provided can be provided.

The organization chart of the three-dimensional structure knitted fabric of Example 1. FIG. The organization chart of the knitted fabric of the comparative example 2.

The three-dimensional knitted fabric of the present invention is required to have a compression work (WC) of 10.0 or more when a load of 50 gf / cm ² is applied in the thickness direction of the knitted fabric at a speed of 1 mm / sec, preferably 15.0 to 60.0.
Here, the work of compression (WC) is a value indicating the ease of compression in the thickness direction of the knitted fabric, and is obtained with a compression tester. It shows that it is excellent in cushioning properties, so that this value is large.
When the work of compression (WC) is less than 10.0, sufficient cushioning properties cannot be obtained. When used by stretching it on a chair frame, the knitted fabric feels stiff and provides good sitting comfort. May not be obtained.

Furthermore, the three-dimensional knitted fabric of the present invention is required to have a compression resilience (RC) of 40.0 or more when a load of 50 gf / cm ² is applied at a speed of 1 mm / sec in the thickness direction of the knitted fabric. Is 45.0-70.0.
Here, the compression resilience (RC) is a value indicating compression recovery in the thickness direction of the knitted fabric, and is obtained with a compression tester. It shows that the larger this value is, the better the compression recovery in the thickness direction is.
When the compression resilience (RC) is less than 40.0, the compression recovery property in the thickness direction is not sufficient, and there is a possibility of giving a feeling of bottoming when used by stretching the chair frame. Moreover, there is a possibility that the knitted fabric itself may be crushed or depressed due to repeated use.

  Further, the three-dimensional structure knitted fabric is required to have a knitted fabric thickness of 2.0 to 7.0 mm, preferably 2.0 to 5.0 mm. When the thickness is less than 2.0 mm, when the three-dimensional structure knitted fabric of the present invention is stretched on a chair frame, it gives a feeling of bottoming and it is difficult to obtain a good sitting comfort. . In addition, if the thickness exceeds 7.0 mm, the connecting part may not support the weight of the outer and lining tissues and may collapse, and the outer and lining tissues are easily displaced from front to back and from side to side and provide a stable sitting comfort. It becomes difficult to obtain.

Furthermore, the three-dimensional structure knitted fabric of the present invention, the total fineness of the connecting yarn, it is required a 7920~495000dtex / ^{(2.54cm) 2,} preferably 14168~277200dtex / ^{(2.54cm) 2.}
When the total fineness of the connecting yarn is less than 7920 dtex / (2.54 cm) ² , the compression resilience (RC) is lowered, which is favorable when the three-dimensional structure knitted fabric is stretched on a chair frame. Sitting comfort is not obtained. Further, when the total fineness of the connecting yarn is larger than 495,000 dtex / (2.54 cm) ² , the work of compression (WC) is lowered, and the three-dimensional structure knitted fabric is used by stretching it on the chair frame. In this case, a good sitting comfort cannot be obtained.
The total fineness (H) [dtex / (2.54 cm) ² ] of the connecting yarn is the number of loops in the course direction (C) [pieces / 2.54 cm] and the number of loops in the wale direction (W) [pieces / 2.54 cm]. And the fineness [dtex] of the connecting yarn.
Total fineness of connecting yarn (H) [dtex / (2.54 cm) ² ] =
Number of loops in the course direction (C) [piece / 2.54cm]
× Number of loops in the wale direction (W) [pieces / 2.54cm]
× Fineness of connecting yarn [dtex]

Furthermore, the three-dimensional structure knitted fabric of the present invention is required to contain a polyester monofilament elastic yarn in either the outer fabric or the lining fabric.
Polyester monofilament elastic yarn is very excellent in stretch recovery as compared with non-elastic yarn. Therefore, by including the elastic yarn in either the outer fabric or the lining fabric constituting the three-dimensional structure knitted fabric, even when the ground fabric is repeatedly stretched and recovered, the ground fabric is loosened and wrinkled or crushed. Can be suppressed.
Moreover, since the elastic yarn is contained only in either the outer fabric or the lining tissue, the amount of the elastic yarn used is less than when the elastic yarn is used for both the outer fabric and the lining fabric. Deterioration of the texture caused by containing the yarn can be suppressed.

The fineness of the polyester monofilament elastic yarn is preferably 110 to 1100 dtex, more preferably 220 to 900 dtex.
If the fineness is less than 110 dtex, there will be no tension or stiffness in the yarn, and sufficient stretch recovery may not be obtained when the ground texture is knitted. On the other hand, if the fineness exceeds 1100 dtex, the knitted ground structure becomes hard and the texture may deteriorate.

  Furthermore, it is preferable that the polyester monofilament elastic yarn contained in either the surface structure or the lining structure of the above-described three-dimensional knitted fabric is inserted and knitted. Thereby, it becomes possible to arrange | position an elastic thread | yarn easily in a surface fabric or a lining fabric.

Further, the elastic yarn preferably has a bulk density of 3000 to 15000 dtex / cm, more preferably 4000 to 13000 dtex / cm in the surface structure or the lining structure.
Here, in this specification, the bulk density represents the amount of elastic yarn contained in a unit interval (1 cm) in the wale direction or course direction in the ground structure containing elastic yarn, Affects cushioning and texture.
The bulk density is determined by the following formula. In addition, the arrangement density (G) of the elastic yarn in the formula is the number of elastic yarns within a unit interval (1 cm).

Bulk density (J) [dtex / cm] =
Elastic yarn arrangement density (G) [lines / cm] × elastic yarn fineness (T) [dtex / lines]

When the bulk density of the polyester monofilament elastic yarn is less than 3000 dtex / cm, the cushioning property and the stretchability of the knitted three-dimensional knitted fabric are not sufficient, and it is good when used by stretching on a chair frame. Sitting comfort may not be obtained. Further, if the bulk density exceeds 15000 dtex / cm, the three-dimensional structure knitted fabric becomes hard, and there is a possibility that good sitting comfort may not be obtained when it is used by being stretched on a chair frame.

Further, the proportion of the elastic yarn in the three-dimensional structure knitted fabric is preferably 15 to 50%, more preferably 20 to 45%.
If the elastic yarn occupies less than 15%, the knitted three-dimensional knitted fabric is not sufficiently cushioned and stretchable, and a good sitting comfort can be obtained when it is stretched on a chair frame. There is a risk of not. If the elastic yarn occupies more than 50%, the three-dimensional knitted fabric becomes stiff, and there is a possibility that good sitting comfort may not be obtained when used by being stretched on a chair frame.

Further, the elastic yarn preferably has an overlap of 1 to 10 wales in one course when inserted and knitted in a range of 2 to 10, more preferably 2 to 6.
When the elastic yarn overlap is less than two, the knitted three-dimensional knitted fabric is not sufficiently cushioned and stretchable, and when it is used by stretching it on a chair frame, a good sitting comfort cannot be obtained. There is a fear. Moreover, when there are more than 10 elastic yarns overlapped, the three-dimensional knitted fabric becomes stiff, and there is a possibility that good sitting comfort may not be obtained when used by being stretched on a chair frame.

Furthermore, in the overlap between one wales in one course of the elastic yarn, the total fineness is preferably in the range of 220 to 11000 dtex, more preferably 220 to 6600 dtex.
If the total fineness of the elastic yarn is less than 220 dtex, the three-dimensional structure knitted fabric is not sufficiently cushioned and stretchable, and it may not be possible to obtain a good seating comfort when used on a chair frame. There is. Further, if the total fineness of the elastic yarn is more than 11000 dtex, the three-dimensional structure knitted fabric becomes hard, and there is a possibility that good sitting comfort may not be obtained when it is used by being stretched on a chair frame.

  Further, specific examples of the three-dimensional structure knitted fabric in the present invention are not particularly limited, and examples thereof include a double raschel knitted fabric and a double jersey knitted fabric. Among them, a double raschel knitted fabric is preferably used in that the knot of the stitch is strong and the structure strength is excellent.

The three-dimensional structure knitted fabric thus obtained has a good texture. As one of the indexes showing it, the bending resistance defined by the JIS L1096 bending resistance A method (45 ° cantilever method) is preferably 50 mm to 150 mm.
If the bending resistance is less than 50 mm, the softness of the knitted fabric can be obtained, but the knitted fabric will be insufficiently firm and firm, and a good sitting comfort will be obtained when it is stretched on a chair. There is a risk of not being able to.
In addition, a knitted fabric having a bending resistance exceeding 150 mm is hard, and there is a possibility that good sitting comfort may not be obtained when used by being stretched on a chair.

Hereinafter, an example of the best embodiment of the present invention will be given and described in more detail.
The three-dimensional structure knitted fabric of the present invention only needs to contain a polyester monofilament elastic yarn in either the surface structure or the lining structure, and it is necessary to specify whether the containing structure is a surface structure or a lining structure. There is no. Therefore, in the present specification, in the following description showing an example of the best mode of the present invention, a polyester monofilament elastic yarn is included in the backing structure for easy understanding.
Further, in the following description, when the three-dimensional structure knitted fabric according to the present invention is used by being stretched on a chair frame, the ground tissue that is in contact with the skin is referred to as the surface tissue, and the opposite side is the lining texture. And
Furthermore, the three-dimensional structure knitted fabric in the following description is knitted using a double raschel knitting machine.
However, the three-dimensional structure knitted fabric according to the present invention is not limited to these.

  A three-dimensional structure knitted fabric, which is an example of the best embodiment of the present invention, is composed of a surface fabric, a lining fabric, and a connecting portion.

  The lining structure constituting the three-dimensional structure knitted fabric, which is an example of the best embodiment in the present invention, contains a polyester monofilament elastic yarn, and is used by stretching the three-dimensional structure knitted fabric on a chair frame. In some cases, it has a role of exhibiting cushioning properties and stretchability.

  A specific example of the backing structure is not particularly limited as long as the structure includes a polyester monofilament elastic yarn, but it is preferable that the polyester monofilament elastic yarn is inserted and knitted into the ground structure.

Further, the backing structure may be a structure such as denvi or cord. However, in order to obtain the performance of the present invention, it is preferable that a polyester monofilament elastic yarn is inserted and knitted into the chain stitch structure.
The chain knitted structure is preferable because it can suppress the elongation in the vertical direction more than necessary and suppress distortion of the knitted fabric due to repeated seating.

Furthermore, the polyester monofilament elastic yarn is preferably inserted and knitted in the ground structure by underwrapping between 3 and 12 stitches, and can be underlaid and knitted between 4 and 10 stitches in the ground tissue. More preferred.
If the amount is less than the above range, the knitted fabric tends to be stretched, and the knitted fabric is distorted. Therefore, there is a possibility that good sitting comfort may not be obtained when used by stretching the chair frame. . On the other hand, when the amount is larger than the above range, the knitted fabric is hard and has no cushioning property, and there is a possibility that good sitting comfort may not be obtained when used by being stretched on a chair frame.

As yarns used in the chain stitch structure, various chairs (office chairs, wheelchairs, folding chairs, nursing chairs, etc.), various beds (nursing beds, bedding beds, etc.), various vehicle seats ( The yarn is not particularly limited as long as the yarn is used in a seat such as an automobile seat or a train seat). Generally, polyester yarn (polyester spun yarn, polyester filament, polyester processed yarn, etc.) Widely used for knitted fabrics.
As the polyester yarn, polyester filaments and polyester processed yarns are particularly preferably used in terms of excellent yarn breaking strength and wear strength.
In addition, what is necessary is just to select suitably according to a use, a design, etc. about a polyester filament and polyester processed yarn.

Moreover, when a polyester yarn is used for the chain stitch structure, the fineness of the polyester yarn is preferably 84 to 550 dtex, more preferably 167 to 330 dtex.
If the fineness is less than 84 dtex, the wear strength of the yarn is lowered, and the strength of the ground structure may be lowered. On the other hand, if the fineness exceeds 550 dtex, the ground texture may become hard and the texture may deteriorate.

  The lining structure is preferably knitted by two to three ridges among the ridges equipped on the double raschel knitting machine.

  The surface structure constituting the three-dimensional structure knitted fabric which is an example of the best embodiment of the present invention is a ground structure having both strength and performance and having design properties.

  A specific example of the surface material structure is not particularly limited as long as it is a structure that can be knitted with a double raschel knitting machine. Among these, a mesh structure is preferably used in terms of light weight and anti-steaming properties. In addition, the mesh structure can absorb the shrinkage difference between the surface tissue and the lining tissue by the gap of the tissue, and thus has an effect of suppressing generation of wrinkles.

  Furthermore, since the surface material does not contain elastic yarn, it has a good feeling per skin and gives a good sitting comfort when used by being stretched on a chair frame.

  As the yarn used for the surface fabric, the same yarn as that used for the chain stitch structure can be used. Among them, the polyester yarn (polyester filament, polyester processed yarn) has the breaking strength of the yarn and It is preferably used in terms of excellent wear strength. Of these, polyester processed yarns are particularly preferably used because they are excellent in bulkiness and provide a good texture.

Moreover, when the polyester processed yarn is used for the surface texture, the fineness of the polyester processed yarn is preferably 84 to 550 dtex, more preferably 167 to 330 dtex.
If the fineness is less than 84 dtex, the wear strength of the yarn is lowered, and the strength of the ground structure may be lowered. On the other hand, if the fineness exceeds 550 dtex, the ground structure may become hard and the texture may be deteriorated, or the structure that can be knitted may be limited.

  It is preferable that the surface material is knitted with 2 to 3 ridges among the ridges equipped on the double raschel knitting machine.

  An example of the best embodiment of the present invention, the connecting portion constituting the three-dimensional structure knitted fabric is used by providing cushioning to the three-dimensional structure knitted fabric and stretching the three-dimensional structure knitted fabric on a chair frame. It has a role to eliminate the feeling of bottoming that is received in the case of.

The configuration of the connecting portion is not particularly limited as long as the total fineness of the connecting yarn described above is satisfied.
In addition, the said connection part is comprised by connecting a surface structure and a lining structure | tissue with a connection thread | yarn. The structure of the connecting yarn at this time is not particularly limited. The connecting yarn has an orthogonal connecting yarn that is connected to the upper and lower surfaces in a substantially orthogonal state, and the oblique connection that is connected obliquely to the upper and lower surfaces. It may also be a truss structure having a thread, or a truss structure having both orthogonal and oblique connecting threads at the same time.

  As the connecting yarn, the same yarn as that used in the chain stitch structure can be used, and in particular, polyester yarn (polyester spun yarn, polyester monofilament, polyester filament, polyester processed yarn) is used. It is preferably used in terms of excellent breaking strength and wear strength. Of these, polyester monofilaments and polyester processed yarns are preferably used in that the connecting portion formed is excellent in cushioning properties.

Further, when a polyester yarn is used as the connecting yarn, the fineness of the polyester yarn is preferably 22 to 330 dtex, more preferably 22 to 167 dtex.
If the fineness is less than 22 dtex, the yarn is too thin, so that when the connecting portion is formed, the necessary cushioning property may not be obtained. On the other hand, if the fineness exceeds 330 dtex, the connecting yarn is likely to be exposed on the surface of the outer fabric or lining fabric, and a good texture may not be obtained.
In addition, what is necessary is just to select suitably according to a use, a design, etc. about a polyester monofilament and polyester processed yarn.

  It is preferable that the connecting portion is knitted by one or two ridges among the ridges equipped on the double raschel knitting machine.

  In addition, the three-dimensional structure knitted fabric obtained as described above may be dyed according to the application or design, and the dyeing method and the like are not particularly limited. Further, in the stage of knitting the three-dimensional structure knitted fabric, yarn dyed and processed may be used.

EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated further in detail, this invention is not limited to these at all.
In addition, the measurement and each evaluation in an Example were performed as follows.

[Total fineness of connecting yarn (H)]
First, the number of loops in the course direction (C) [pieces / 2.54 cm] and the number of loops in the wale direction (W) [pieces / 2.54 cm] were obtained.
Next, the total fineness of the connecting yarn was calculated using the following equation from the obtained number of loops in the course direction and the number of loops in the wale direction and the fineness [dtex] of the connecting yarn used for the test cloth.

Total fineness of connecting yarn (H) [dtex / (2.54 cm) ² ] =
Number of loops in the course direction (C) [piece / 2.54cm]
× Number of loops in the wale direction (W) [pieces / 2.54cm]
× Fineness of connecting yarn [dtex]

[Measurement of compression work (WC)]
Compression tester (Kato Tech Co., Ltd., KES-FB3-AUTO-A automated compression tester) with respect to the pressure area 2 cm ^2, the load 50 gf / cm ^2, under the condition of speed 1 mm / sec, test cloth Compressive work (WC) when pressed in the thickness direction was measured.

[Measurement of compression resilience (RC)]
Compression tester (Kato Tech Co., Ltd., KES-FB3-AUTO-A automated compression tester) with respect to the pressure area 2 cm ^2, the load 50 gf / cm ^2, under the condition of speed 1 mm / sec, test cloth Compressive resilience (RC) when pressed in the thickness direction was measured.

[Bulk density of elastic yarn]
First, the number of elastic yarns arranged within a unit interval (1 cm) in the wale direction or the course direction of the test cloth, that is, the arrangement density (G) [lines / cm] of the elastic yarns was obtained.
Next, the bulk density of the elastic yarn was calculated using the following equation from the obtained arrangement density (G) of the elastic yarn and the fineness (T) [dtex / piece] of the elastic yarn used for the test cloth.

Bulk density (J) [dtex / cm] =
Elastic yarn arrangement density (G) [lines / cm] × elastic yarn fineness (T) [dtex / lines]

[Texture evaluation]
According to the following evaluation methods 1) and 2), the texture of each test cloth was evaluated.

1) Measurement of bending resistance Each test cloth was sampled in a size of 2 cm × 15 cm in the vertical direction and the horizontal direction. Next, based on JIS L1096 stiffness / softness A method (45 ° cantilever method), the stiffness of the collected test cloth was measured using a cantilever type tester. (Measurement limit: 150 mm)

2) Sensory evaluation Ten men and women in their 20s to 50s grabbed the test cloth lightly several times, and the texture of the test cloth was judged by sensory evaluation. From the results, evaluation was made based on the following criteria.

○: Eight or more out of 10 people judged that the texture was soft and good.
(Triangle | delta): Five to seven out of 10 judged that it was a soft and favorable texture.
X: 0 to 4 out of 10 people judged that the texture was soft and good.

[Evaluation of sitting comfort]
1) Evaluation of each item regarding sitting comfort A 60 cm square cube was formed with a stainless steel pipe, and then a test cloth was stretched on the upper frame of the cube to prepare a pseudo sheet.
10 men and women in their 20s to 50s continue to sit on the prepared pseudo-seats for 5 minutes, and “good”, “no problem”, and “problem” for the following items (I) to (V), respectively. Sensory evaluation was performed in three stages.
(I) Hardness: Whether or not the bearing surface feels hard.
(II) Cushioning property: Whether the seating surface has cushioning property.
(III) A feeling of bottoming: Whether the seat has a feeling of bottoming.
(IV) Pain: Whether to feel pain in the buttocks due to repulsion from the seating surface.
(V) Stability: Whether the body does not wobble while sitting.

Subsequently, it evaluated based on the following reference | standard from the result of sensory evaluation.

○: 8 or more out of 10 people judged to be “good”.
(Triangle | delta): 5-7 people out of 10 judged that it was "good."
X: 0 to 4 out of 10 people judged “good”.

2) Comprehensive evaluation of sitting comfort Based on the evaluation results of each item relating to the sitting comfort described above, a comprehensive evaluation of sitting comfort was performed based on the following criteria.

○: All item evaluations (I) to (V) are ○.
(Triangle | delta): One or more (triangle | delta) is included among item evaluation of (I)-(V), and all are (triangle | delta) or more.
X: 1 or more of x is included among the item evaluation of (I)-(V).

[Example 1]
A double raschel knitting machine (RD-6DPLM22E, manufactured by KARL MAYER) was used to knit a three-dimensional structure knitted fabric composed of a surface structure, a lining structure, and a connecting portion.

At this time, the knitted fabric was knitted with the heel L2, and the knitted fabric was knitted with the knitted fabric L1 to insert the knitted fabric.
A polyester monofilament elastic yarn having a fineness of 330 dtex was used for the heel L1, and a polyester filament having a fineness of 167 dtex was used for the heel L2.
Further, the heel L1 was subjected to insertion knitting by causing the elastic yarn to underlap between 6 stitches.

Further, at this time, a surface structure composed of a mesh structure was knitted at the heels L4 and L5.
A polyester processed yarn having a fineness of 167 dtex was used for the heels L4 and L5.

Further, at this time, the connecting portion was knitted by connecting the stitches on the same course of the outer fabric structure and the lining organization at the heel L3.
A polyester monofilament having a fineness of 33 dtex was used for the heel L3.

  Further, the heel L6 was not used in the three-dimensional knitted fabric knitting of Example 1.

  Subsequently, the obtained three-dimensional structure knitted fabric was preset at 190 ° C., dyed at 130 ° C., and then set at 150 ° C. to obtain the three-dimensional structured knitted fabric of Example 1.

The thickness of the obtained three-dimensional structure knitted fabric was 2.3 mm, and the total fineness of the connecting yarn was 28314 dtex / (2.54 cm) ² . Moreover, the compression work (WC) of the obtained three-dimensional structure knitted fabric is 20.0, the compression resilience (RC) is 53.5, and the bulk density of the polyester monofilament elastic yarn contained in the backing structure is 4287 dtex / cm. there were.
Table 1 summarizes the results of the three-dimensional structure knitted fabric of Example 1.

[Example 2]
The same double raschel knitting machine as in Example 1 was used to knit a three-dimensional structure knitted fabric composed of a surface structure, a lining structure, and a connecting portion.

At this time, the knitted fabric was knitted with the collar L3, and the knitted fabric was further knitted with the collars L1 and L2, thereby knitting the lining structure.
A polyester monofilament elastic yarn having a fineness of 850 dtex was used for the heel L1, and a polyester processed yarn having a fineness of 167 dtex was used for the heel L2 and L3.
Further, the heel L1 was subjected to insertion knitting by causing the elastic yarn to underlap between 10 stitches, and the heel L2 was subjected to insertion knitting by causing the processed yarn to be underwrapped between 4 stitches.

Further, at this time, a surface structure composed of a mesh structure was knitted at the heels L5 and L6.
In addition, polyester yarn with a fineness of 220 dtex was used for the heels L5 and L6.

At this time, the connecting portion was knitted by connecting the stitches on the same course of the outer fabric structure and the lining organization at the heel L4.
A polyester monofilament having a fineness of 33 dtex was used for the heel L4.

  Subsequently, the same process as Example 1 was performed with respect to the obtained three-dimensional structure knitted fabric, and the three-dimensional structure knitted fabric of Example 2 was obtained.

The thickness of the obtained three-dimensional structure knitted fabric was 2.6 mm, and the total fineness of the connecting yarn was 29700 dtex / (2.54 cm) ² . In addition, the compression work (WC) of the obtained three-dimensional structure knitted fabric is 24.6, the compression resilience (RC) is 55.2, and the bulk density of the polyester monofilament elastic yarn contained in the backing structure is 10913 dtex / cm. there were.
The results of the three-dimensional structure knitted fabric of Example 2 are summarized in Table 1.

[Example 3]
The same double raschel knitting machine as in Example 1 was used to knit a three-dimensional structure knitted fabric composed of a surface structure, a lining structure, and a connecting portion.

At this time, the knitted fabric was knitted with the heel L2, and the knitted fabric was knitted with the knitted fabric L1 to insert the knitted fabric.
A polyester monofilament elastic yarn having a fineness of 550 dtex was used for the heel L1, and a polyester processed yarn having a fineness of 167 dtex was used for the heel L2.
In addition, the heel L1 was subjected to insertion knitting by underwrapping the elastic yarn between 5 stitches.

Further, at this time, the chain structure was knitted with the collar L4, and the outer structure was knitted by performing insertion knitting into the chain structure with the collars L5 and L6.
A polyester processed yarn having a fineness of 167 dtex was used for the heels L5 and L6.
The heel L5 was subjected to insertion knitting by underwrapping the processed yarn between 5 stitches, and the heel L6 was subjected to insertion knitting by underwrapping the processed yarn between 7 stitches.

Further, at this time, the connecting portion was knitted by connecting the stitches on the same course of the outer fabric structure and the lining organization at the heel L3.
A polyester monofilament having a fineness of 22 dtex was used for the heel L3.

  Subsequently, the same process as Example 1 was performed with respect to the obtained three-dimensional structure knitted fabric, and the three-dimensional structure knitted fabric of Example 3 was obtained.

The thickness of the obtained three-dimensional structure knitted fabric was 2.1 mm, and the total fineness of the connecting yarn was 19800 dtex / (2.54 cm) ² . In addition, the compression work (WC) of the obtained three-dimensional structure knitted fabric is 16.6, the compression resilience (RC) is 52.9, and the bulk density of the polyester monofilament elastic yarn contained in the backing structure is 7795 dtex / cm. there were.
The results of the three-dimensional structure knitted fabric of Example 3 are summarized in Table 1.

[Comparative Example 1]
A knitted fabric was knitted using a Russell machine (RS7 MSU, manufactured by KARL MAYER).

At this time, the chain structure was knitted with the collar L3, and the ground structure was further knitted by inserting and knitting the chain structure with the collars L1 and L2.
A polyester monofilament elastic yarn having a fineness of 330 dtex was used for the heel L1, and a polyester processed yarn having a fineness of 330 dtex was used for the heels L2 and L3.
The heel L1 was subjected to insertion knitting with the elastic yarn underwrapped between two stitches, and the heel L2 was subjected to insertion knitting with the processed yarn underlapped between two stitches.

  Further, when knitting the ground structure, simultaneously using a weft insertion device mounted on the Russell machine, a polyester monofilament elastic yarn having a fineness of 3030 dtex (筬 W1) and a fineness of 2000 dtex are used as the insertion yarn for the knitted fabric. The Mole yarn (筬 W2) was inserted in a straight line with respect to the wale direction for each course.

  Next, the obtained knitted fabric was subjected to the same treatment as in Example 1, and a knitted fabric of Comparative Example 1 having no connecting portion was obtained.

The thickness of the obtained knitted fabric was 1.2 mm. The obtained knitted fabric had a compression work (WC) of 6.4, a compression resilience (RC) of 36.7, and a bulk density of the polyester monofilament elastic yarn contained in the backing structure was 17000 dtex / cm. . The knitted fabric of Comparative Example 1 had no connecting portion, that is, no connecting yarn.
The results of the knitted fabric of Comparative Example 1 are summarized in Table 1.

[Comparative Example 2]
The knitted fabric was knitted using a Russell machine (RM-6F, manufactured by KARL MAYER).

At this time, the mesh structure was knitted at the heels L1, L2, L3, and L6.
Note that polyester filaments having a fineness of 330 dtex were used for the collars L1, L2, L3, and L6.

At this time, insertion knitting was performed on the mesh structure at the heels L4 and L5.
A polyester monofilament elastic yarn having a fineness of 850 dtex was used for the heels L4 and L5.
In addition, the heels L4 and L5 were subjected to insertion knitting by causing the elastic yarn to underlap between four stitches.

  Next, the obtained knitted fabric was subjected to the same treatment as in Example 1 to obtain a knitted fabric of Comparative Example 2 having no connecting portion.

The thickness of the obtained knitted fabric was 1.0 mm. Moreover, the compression work (WC) of the obtained knitted fabric was 4.3, the compression resilience (RC) was 25.1, and the bulk density of the polyester monofilament elastic yarn contained in the backing structure was 2159 dtex / cm. . The knitted fabric of Comparative Example 1 had no connecting portion, that is, no connecting yarn.
The results of the knitted fabric of Comparative Example 2 are summarized in Table 1.

[Comparative Example 3]
A double raschel knitting machine (RD-6DPLM22E, manufactured by KARL MAYER) was used to knit a three-dimensional structure knitted fabric composed of a surface structure, a lining structure, and a connecting portion.

At this time, the knitted fabric was knitted with the heel L2, and the knitted fabric was knitted with the knitted fabric L1 to insert the knitted fabric.
A polyester monofilament elastic yarn having a fineness of 550 dtex was used for the heel L1, and a polyester processed yarn having a fineness of 167 dtex was used for the heel L2.
Further, the heel L1 was subjected to insertion knitting by underwrapping the elastic yarn between 5 stitches.

Further, at this time, a surface structure composed of a mesh structure was knitted at the heels L4 and L5.
A polyester processed yarn having a fineness of 167 dtex was used for the heels L4 and L5.

Further, at this time, the connecting portion was knitted by connecting the stitches on the same course of the outer fabric structure and the lining organization at the heel L3.
A polyester monofilament having a fineness of 22 dtex was used for the heel L3.

  Further, the heel L6 was not used in the three-dimensional structure knitted fabric knitting of Comparative Example 3.

  Subsequently, the obtained three-dimensional structure knitted fabric was preset at 190 ° C., dyed under conditions of 130 ° C., and then set at 150 ° C. to obtain a three-dimensional structure knitted fabric of Comparative Example 3.

The thickness of the obtained three-dimensional structure knitted fabric was 1.5 mm, and the total fineness of the connecting yarn was 7392 dtex / (2.54 cm) ² . In addition, the compression work (WC) of the obtained three-dimensional knitted fabric is 14.4, the compression resilience (RC) is 33.1, and the bulk density of the polyester monofilament elastic yarn contained in the backing structure is 6062 dtex / cm. there were.
The results of the three-dimensional structure knitted fabric of Comparative Example 3 are summarized in Table 1.

[Comparative Example 4]
A double raschel knitting machine (RD-6DPLM22E, manufactured by KARL MAYER) was used to knit a three-dimensional structure knitted fabric composed of a surface structure, a lining structure, and a connecting portion.

At this time, the knitted fabric was knitted with the heel L2, and the knitted fabric was knitted with the knitted fabric L1 to insert the knitted fabric.
A polyester monofilament elastic yarn having a fineness of 550 dtex was used for the heel L1, and a polyester filament having a fineness of 167 dtex was used for the heel L2.
Further, the heel L1 was subjected to insertion knitting by underwrapping the elastic yarn between 6 stitches.

Further, at this time, a surface structure composed of a mesh structure was knitted at the heels L5 and L6.
In addition, polyester yarn with a fineness of 220 dtex was used for the heels L5 and L6.

At this time, the connecting portion was knitted by connecting the stitches on the same course of the outer structure and the lining structure at the heels L3 and L4.
Note that polyester yarns having a fineness of 220 dtex were used for the ridges L3 and L4.

  Subsequently, the obtained three-dimensional structure knitted fabric was preset at 190 ° C., dyed at 130 ° C., and then set at 150 ° C. to obtain a three-dimensional structured knitted fabric of Comparative Example 4.

The thickness of the obtained three-dimensional structure knitted fabric was 4.0 mm, and the total fineness of the connecting yarn was 660000 dtex / (2.54 cm) ² . Moreover, the compression work (WC) of the obtained three-dimensional structure knitted fabric is 7.9, the compression resilience (RC) is 64.2, and the bulk density of the polyester monofilament elastic yarn contained in the backing structure is 10826 dtex / cm. there were.
The results of the three-dimensional structure knitted fabric of Comparative Example 4 are summarized in Table 1.

[Evaluation]
The three-dimensional structure knitted fabric of Example 1 did not feel hardness in the evaluation of sitting comfort and was excellent in cushioning properties. In addition, there was no pain in the buttocks due to repulsion from the seating surface, and no feeling of bottoming was given. In addition, the body did not wobble while sitting, and it was excellent in stability. Therefore, the three-dimensional structure knitted fabric of Example 1 gave good sitting comfort.
Further, the texture of the three-dimensional structure knitted fabric itself was also good.

The three-dimensional structure knitted fabric of Example 2 does not feel hardness in the evaluation of sitting comfort, like the three-dimensional structure knitted fabric of Example 1, has sufficient cushioning properties, and is painful to the buttocks due to repulsion from the seating surface. It was something that did not give. Also, there was no bottom feeling and the body did not wobble while sitting. Therefore, the three-dimensional structure knitted fabric of Example 2 gave good sitting comfort.
Further, the texture of the three-dimensional structure knitted fabric itself was also good.

The three-dimensional structure knitted fabric of Example 3 also did not feel hardness in the evaluation of sitting comfort, had sufficient cushioning properties, and did not give pain to the buttocks due to repulsion from the seating surface. Also, there was no bottom feeling and the body did not wobble while sitting. Therefore, the three-dimensional structure knitted fabric of Example 3 gave good sitting comfort.
Further, the texture of the three-dimensional structure knitted fabric itself was also good.

  In the knitted fabric of Comparative Example 1, in the evaluation of sitting comfort, the seat surface felt hard, the cushioning property was poor, and a feeling of bottoming was given. In addition, the rebound from the seat surface was strong, and pain was felt in the buttocks. Therefore, the knitted fabric of Comparative Example 1 did not give good sitting comfort. Further, the texture of the knitted fabric itself was hard and was not good.

  The knitted fabric of Comparative Example 2 was soft and good in texture, but in the evaluation of sitting comfort, the cushioning property was poor and gave a feeling of bottoming. Moreover, since the sinking was large, the body was wobbled and lacked a sense of stability. Therefore, the knitted fabric of Comparative Example 2 did not give good sitting comfort.

  Although the three-dimensional structure knitted fabric of Comparative Example 3 was soft and good in texture, in the evaluation of sitting comfort, the cushioning property was poor and gave a feeling of bottoming. Moreover, since the sinking was large, the body was wobbled and lacked a sense of stability. Therefore, the three-dimensional structure knitted fabric of Comparative Example 3 did not give good sitting comfort.

  In the three-dimensional structure knitted fabric of Comparative Example 4, the knitted fabric felt hard and the cushioning property was poor in the evaluation of sitting comfort. In addition, the rebound from the seat surface was strong, and pain was felt in the buttocks. Therefore, the three-dimensional structure knitted fabric of Comparative Example 4 did not give good sitting comfort.

Claims (3)

A three-dimensional structure knitted fabric composed of a surface fabric, a lining fabric and a connecting portion, wherein a polyester monofilament elastic yarn is inserted and knitted into either the surface fabric or the lining fabric of the knitted fabric, (A) The thickness is 2.0 to 7.0 mm, (b) the total fineness of the connecting yarn is 7920 to 495000 dtex / (2.54 cm) ² , and (c) a load of 50 gf in the thickness direction of the knitted fabric / compression work amount when the cm ² went speed 1 mm / sec (WC) is not less than 10.0, when the load 50 gf / cm ² went speed 1 mm / sec in the direction of thickness of (d) knitted fabric A three-dimensional structure knitted fabric characterized by having a compression resilience (RC) of 40.0 or more. The three-dimensional structure knitted fabric according to claim 1 , wherein the polyester monofilament elastic yarn contained in the three-dimensional structure knitted fabric has a bulk density of 3000 to 15000 dtex / cm. The three-dimensional knitted fabric according to claim 1 or 2 , wherein the polyester monofilament elastic yarn is under-wrapped between 3 to 12 needles and inserted and knitted into the ground texture.

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