JP2022184411A - Seat surface material and seat including the same - Google Patents

Abstract

To provide a seat surface material including a cubic knitted fabric, which is excellent in preventing a connection yarn from laterally toppling, in cushioning property, designability and slip resistance of the cubic knitted fabric.SOLUTION: A seat surface material includes a cubic knitted fabric formed of a knitted fabric having a surface layer and a back layer and a connection yarn for connecting the surface and back layers to each other. Embroidery or sewing is provided on at least one layer of the cubic knitted fabric. The seat surface material has at least one junction portion at which the surface knitted fabric and the back surface knitted fabric are joined by the embroidery or the sewing. A seat includes the seat surface material.SELECTED DRAWING: Figure 1

Description

The present invention relates to a seat covering material and a seat including the same.

Conventionally, urethane foam was mainly used as a cushioning material for various chairs and seats. However, urethane foam has various problems, such as the difficulty of handling the chemicals used during manufacturing, the generation of toxic gas when disposed of, and the difficulty of recycling. In addition, the foamed urethane cushion material is poor in breathability and heat dissipation, and when seated, it is easy to feel stuffy and sticky with sweat, and comfortable sitting is not obtained. Therefore, in recent years, three-dimensional knitted fabrics and the like have come to be used as cushioning materials in place of urethane foam.

BACKGROUND ART A three-dimensional knitted fabric composed of two layers of knitted fabric on the front and back and connecting yarns for connecting the two layers of knitted fabric is used for various purposes such as a cushioning material due to its excellent air permeability and compressive elasticity recovery. When used for such purposes,
It may be sewn for the purpose of a) giving a three-dimensional shape, b) layering three-dimensional knitted fabrics to improve cushioning properties, and c) laminating materials other than three-dimensional knitted fabrics. The following Patent Documents 1 and 2 propose a sewn product that is excellent in pressure dispersion and gives a sense of unity of the laminated portion by sewing a laminated product.

JP 2006-257622 A JP 2006-219785 A

However, although the sewn products described in Patent Documents 1 and 2 are excellent in pressure dispersion, the shear deformation of the connecting yarns, which is a problem of the three-dimensional knitted fabric, causes the front knitted fabric and the back knitted fabric to extend the length of the three-dimensional knitted fabric. No consideration was given to the ability to prevent the "horizontal collapse" phenomenon that shifts in the direction (direction along the row of wales). not

In view of the above technical level, the problem to be solved by the present invention is to provide a seat covering material including a three-dimensional knitted fabric, which is excellent in preventing sideways collapse of the connecting thread of the three-dimensional knitted fabric, cushioning properties, design properties, and slip resistance. It is to be.

As a result of intensive research and repeated experiments in order to solve the above problems, the present inventors have found that one layer of a seat covering material including a three-dimensional knitted fabric is embroidered or sewn, and the front knitted fabric and the back knitted fabric are made by the embroidery or sewing. The present inventors have unexpectedly found that the above-described problems can be solved by providing a jointed portion, and have completed the present invention.

That is, the present invention is as follows.
[1] A seat covering material including a three-dimensional knitted fabric composed of a two-layered knitted fabric consisting of a surface layer and a back layer, and a connecting yarn connecting the two-layered knitted fabric, wherein at least the three-dimensional knitted fabric is A seat upholstery material having at least one joint portion in which one layer is embroidered or sewn, and a front knitted fabric and a back knitted fabric are joined by the embroidery or sewing.
[2] The seat upholstery material according to [1], wherein the three-dimensional knitted fabric has an average peak height of 1300 μm or more and 5000 μm or less starting from the joint portion.
[3] The area ratio of the joint portion is 10 to 70% in the range of 18 mm × 24 mm centering on the portion where the thread density is the highest among the joint portions, according to [1] or [2]. Seat cover material.
[4] The seat covering material according to any one of [1] to [3], wherein the knitted fabric of the surface layer contains multifilaments, and the stitch density of the knitted fabric of the surface layer is 11,000 to 21,000.
[5] A seat comprising the seat covering material according to any one of [1] to [4].

The seat covering material according to the present invention is a seat that is excellent in cushioning properties, prevention of sideways collapse of connecting threads, design properties, and anti-slip properties.

It is an example of a handle in this embodiment. It is an example of a handle in this embodiment. It is an example of a handle in this embodiment. It is an example of a handle in this embodiment. It is an example of a handle in this embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail.
A first embodiment of the present invention is a seat skin material comprising a three-dimensional knitted fabric composed of a two-layered knitted fabric consisting of a front layer and a back layer, and a connecting yarn that connects the two-layered knitted fabric. , at least one layer of the three-dimensional knitted fabric is embroidered or sewn, and has at least one portion where the front knitted fabric and the back knitted fabric are joined by the embroidery or sewing. is.

The seat upholstery material of the present embodiment is a seat upholstery material including a three-dimensional knitted fabric composed of two layers of knitted fabrics on the front and back and connecting yarns connecting the two layers of knitted fabrics. Such a three-dimensional knitted fabric can be knitted by a warp knitting machine, a circular knitting machine, a flat knitting machine, or the like having two rows of needle beds facing each other. The gauge of the knitting machine is preferably 9 to 28 gauge.

The seat upholstery material of this embodiment is characterized in that at least one layer of three-dimensional knitted fabric is embroidered or sewn. Any thread and method can be used for embroidery or sewing, and an embroidery sewing machine, a lockstitch sewing machine, a zigzag sewing machine, or the like can also be used depending on the shape of the pattern and stitches.

The seat upholstery material of this embodiment is characterized by having at least one portion where the front knitted fabric and the back knitted fabric are joined by embroidery or sewing. If there is at least one portion where the surface knitted fabric and the back knitted fabric are joined by embroidery or sewing, a three-dimensional shape will be formed, which will provide excellent cushioning and slip resistance, and furthermore, the connecting thread. Since the range of motion of is limited, it is also excellent in preventing sideways collapse. If there is no joining portion, the range of motion of the connecting yarn is not restricted, and the ability to prevent sideways collapse cannot be obtained, and the anti-slip property is also inferior.

In the seat covering material of the present embodiment, the average peak height of the three-dimensional knitted fabric starting from the portion where the front knitted fabric and the back knitted fabric are joined by embroidery or sewing is preferably 1300 μm or more and 5000 μm or less, more preferably. It is 1800 μm or more and 4500 μm or less. A specific measuring method will be described later. When the thickness is 1300 μm or more, the three-dimensional knitted fabric has sufficient cushioning properties and is excellent in anti-slip properties. If the thickness is 5000 μm or less, the range of motion of the connecting yarn is restricted, thereby providing excellent prevention of sideways collapse.

In the seat upholstery material of the present embodiment, the area ratio of the joint portion is 10 in the range of 18 mm × 24 mm centering on the portion where the front knitted fabric and the back knitted fabric are joined by embroidery or sewing, where the thread density is the highest. ~70% is preferred. A specific measuring method will be described later. When the area ratio of the joint portion is 10% or more, the range of motion of the connecting yarn is not limited, so that lateral fall prevention is obtained, and design and slip resistance are also excellent. On the other hand, when the area ratio of the joint portion is 70% or less, the three-dimensional knitted fabric has excellent cushioning properties, which is preferable. It is preferable because it is excellent in abrasion resistance and the change in appearance during long-term use is reduced.

In the seat covering material of the present embodiment, when the knitted fabric of the surface layer is composed of multifilament yarn, the following formula:
M=N×√D
{In the formula, N is the number of stitches (pieces) of the knitted fabric of the surface layer per 2.54 cm square (6.45 cm ² ), and D is the multifilament forming one stitch of the knitted fabric of the surface layer The stitch tightness M, which indicates the tightness of one stitch, is preferably 11,000 to 21,000, more preferably 12,000 to 19,000. If the stitch tightness is 11000 or more, the single yarn of the multifilament yarn forming the stitches is less likely to move due to external force such as friction and less likely to become fuzzy. On the other hand, if it is 21,000 or less, it has a soft feel, good knitting properties, and sufficient air permeability. The "total fineness of the multifilament yarn forming one stitch of the surface knitted fabric" is the total fineness of only the multifilament yarn forming the stitch, excluding fibers that do not form stitches such as insertion knitting. Point.

A monofilament yarn or a multifilament yarn can be used as the connecting yarn of the three-dimensional knitted fabric that constitutes the seat covering material of the present embodiment. It is preferred to use a monofilament yarn made from As the fiber material used for the connecting thread, any fiber such as polytrimethylene terephthalate fiber, polybutylene terephthalate fiber, polyethylene terephthalate fiber, polyamide fiber, polypropylene fiber, polyvinyl chloride fiber, polyester elastomer fiber, etc. can be used. can. Among these, the use of polyethylene terephthalate fiber is preferable because it improves the recyclability of the seat upholstery material. The cross-sectional shape of the fiber may be round, triangular, L-shaped, T-shaped, Y-shaped, W-shaped, eight-lobed, flat, polygonal such as dogbone, multi-lobed, hollow or irregular. Although it is good, a round cross section is preferable in terms of improving the durability of the cushioning properties of the seat upholstery material. In addition, in order to prevent the harsh sound generated when the connecting yarns rub against each other when the seat covering material is compressed, a monofilament yarn and a multifilament yarn are used as the connecting yarns by knitting, yarn combination, etc. It is preferred to utilize multifilament yarns as cushioning material.

When a monofilament yarn is used as the connecting yarn, any fineness can be used, but a fineness of 50 to 600 decitex is preferable, and a fineness of 80 to 500 decitex is more preferable in order to obtain a soft feeling of elasticity. The connecting yarn may form looped stitches in the knitted fabric of the surface layer and / or the knitted fabric of the back layer, and may be inserted into the knitted fabric of the surface layer and / or the knitted fabric of the back layer and tucked. Although it may be a structure in which it is hooked in a state, at least two connecting threads connect the knitted fabric of the surface layer and the knitted fabric of the back layer diagonally in opposite directions to each other in a cross shape (X shape) or a truss shape. is preferable for improving the shape stability of the three-dimensional knitted fabric. In this case, both the cross-shaped and truss-shaped connecting yarns may be composed of two connecting yarns. may

The fibers used for the knitted fabric of the surface layer and the knitted fabric of the back layer of the three-dimensional knitted fabric constituting the seat covering material of the present embodiment are polyester-based fibers such as polyethylene terephthalate fiber, polytrimethylene terephthalate fiber, polybutylene terephthalate fiber, and polyamide-based fibers. Fibers, synthetic fibers such as polyacrylic fibers and polypropylene fibers, natural fibers such as cotton, hemp, and wool, and regenerated fibers such as cupra rayon, viscose rayon, and lyocell. The cross-sectional shape of the fiber may be round, triangular, L-shaped, T-shaped, Y-shaped, W-shaped, eight-lobed, flat, polygonal such as dogbone, multi-lobed, hollow or irregular. good. The fibers may be in the form of raw yarns, spun yarns, twisted yarns, false twisted yarns, air-entangled yarns, or bulky textured yarns such as fluid jet textured yarns. When the connecting yarn is a monofilament yarn, in order to increase the coverage so that the connecting yarn is not exposed to the surface of the knitted fabric, it is preferable to use a bulky yarn such as a false-twisted textured yarn of a multifilament yarn or a spun yarn. The fineness of the multifilament yarn in this case is usually 150 to 1000 decitex, and the number of filaments can be set arbitrarily. When the fiber used for the knitted fabric of the surface layer and the back layer is multifilament, the single yarn fineness is preferably 0.5 to 6 decitex, but 1 to 5 decitex is more preferable because the strength of the single yarn is higher. .

The surface layer knitted fabric, the back layer knitted fabric, and/or the connecting yarns of the three-dimensional knitted fabric constituting the seat covering material of the present embodiment are preferably colored. Coloring methods include a method of dyeing uncolored yarn in a skein or cheese form (yarn dyeing), a method of coloring by mixing pigments, dyes, etc. in the undiluted solution before spinning (diluted dyeing), and dyeing in a three-dimensional knitted fabric. A method such as printing is used.

The knitted structures of the front layer knitted fabric and the back layer knitted fabric constituting the seat covering material of the present embodiment do not need to be the same, and may have different knitted structures and different elongation properties. It is preferable that the standard deviation of the coefficient of dynamic friction of the outer surface of the knitted fabric of the back layer is smaller than the standard deviation of the coefficient of dynamic friction of the outer surface of the knitted fabric of the surface layer because it facilitates application as a surface material.

The number of courses/wells of the knitted fabric of the surface layer and the knitted fabric of the back layer of the three-dimensional knitted fabric constituting the seat covering material of the present embodiment is preferably 18/18 to 43/28/2.54 cm, more preferably 25/ 20 to 40/24 pieces/2.54 cm. A predetermined number of courses/wells can be achieved by appropriately selecting the knitting machine gauge, on-machine courses, heat setting conditions, and the like.

The thickness of the seat covering material of the present embodiment can be arbitrarily set according to the purpose, but is preferably 2 to 15 mm, more preferably 3 to 10 mm. If the thickness is 2 mm or more, the cushioning properties are sufficient, and if the thickness is 15 mm or less, knitting and finishing of the three-dimensional knitted fabric are likely to be facilitated. Further, the basis weight of the seat covering material of the present embodiment is preferably 400-1000 g/m ² , more preferably 500-800 g/m ² .

In the method of finishing the three-dimensional knitted fabric constituting the seat covering material of the present embodiment, in the case of three-dimensional knitted fabrics using yarn-dyed yarns or undiluted colored yarns, it is possible to finish the fabric through processes such as scouring and heat setting. When any of the knitted fabric of the surface layer, the knitted fabric of the back layer, and the yarn constituting the connecting yarn is uncolored, the green fabric of the three-dimensional knit can be finished through processes such as presetting, scouring, dyeing, and heat setting. . The final heat setting, which is important for controlling the hardness of the three-dimensional knitted fabric, is preferably carried out while adjusting the angles of the connecting yarns by means of tentering using a pin tenter. Moreover, in order to improve flame retardancy, it is preferable to apply a flame retardant. The three-dimensional knitted fabric after finishing is treated with welding, sewing, resin processing, etc., and is made into a desired shape by thermoforming, etc., and is used as a seat upholstery material. It can be used for various purposes. Although urethane may be laminated on the back surface of the seating surface like conventional seat covering materials, it is preferable to use the seat without lamination from the viewpoint of recyclability.

EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples and comparative examples, but the present invention is not limited only to these examples.
The methods for measuring various physical properties used in the following examples and the like were as follows.

(1) Mountain height (μm) of three-dimensional knitted fabric starting from the joint
Using a one-shot microscope (VR-3200 manufactured by Keyence Co., Ltd.), the seat covering material sampled in a size of 90 mm in length × 140 mm in width was observed, and the front knitted fabric and the back knitted fabric were joined by embroidery or sewing. Take a picture of the part and the mountain part other than that. The depth of the joint and the height of the peak are measured from an arbitrary reference point, and the height of the peak is calculated with the joint as the starting point. The depth of the joint is the deepest part in the range where the front knitted fabric and the back knitted fabric are joined with embroidery thread or sewing thread, and the height of the crest is adjacent to the joint and the embroidery thread or sewing thread is The highest non-existent range. Measurements were performed 10 times by changing the measurement portion in the sampled seat covering material, and the average value was used as the result.

(2) Area ratio of the joint of the joint in the range of 18 mm × 24 mm centered on the point where the thread density is the highest in the joint Using a one-shot microscope (VR-3200 manufactured by Keyence Co., Ltd.), Observing the seat cover material sampled in a size of 90 mm in length × 140 mm in width, the three-dimensional knitted fabric is made high, centering on the part where the front knitted fabric and the back knitted fabric are joined by embroidery or sewing, where the thread density is the highest. The image is taken in the field of view mode with a magnification of 12 times (field of view: 18 mm x 24 mm). In the "volume area" measurement mode of the analysis screen, the "threshold height" is set to 0, the cross-sectional area of the mountain portion other than the joint is obtained, and the value obtained by subtracting 100 is the area ratio of the joint. Measurements were performed 10 times by changing the measurement portion in the sampled seat covering material, and the average value was used as the result.

(3) Stitch denseness M
The number of stitches N (pieces) of the knitted fabric of the surface layer per 2.54 cm square (6.45 cm ² ) is measured with a microscope at an arbitrary point of the seat covering material. Also, the total fineness D (decitex) of the multifilament yarn forming one stitch of the knitted fabric of the surface layer is measured. Using the number of stitches N (pieces) and the total fineness D (decitex) measured as described above, the following formula:
Stitch denseness M = N × √D
The stitch denseness M is calculated by

(4) Cushioning properties An SUV-type seat with a prototype seat upholstery material attached was installed, and 10 wearing monitors (males with a height of 170 cm ± 10 cm, ages 22-32) were selected, and details were given to each monitor. was seated face down and a sensory test was performed. All the subjects wore the same long-sleeved T-shirt and polyester jersey pants as experimental clothes. The cushioning property after sitting for 20 minutes was sensory evaluated according to the following five-grade evaluation criteria, and the mode value was used as the evaluation result.
<Evaluation Criteria for Cushioning Properties>
5: Very good cushioning 4: Slightly good cushioning 3: Neither 2: Slightly poor cushioning 1: Very poor cushioning

(5) Anti-slip property Install the seat prepared in (3) above, select 10 wearing monitors (male with a height of 170 cm ± 10 cm, age 22-32), and sit down with the details to each of the monitors. A sensory test was conducted. All the subjects wore the same long-sleeved T-shirt and jeans as experimental clothes. In the state of being seated on the seat, sensory evaluation was made of the anti-slip property when the body was lightly moved, and the mode value was taken as the evaluation result.
<Evaluation criteria for anti-slip property>
5: Very slippery 4: Somewhat slippery 3: Neither 2: Somewhat slippery 1: Very slippery

(6) Horizontal fall prevention property Ten monitors (male, age 22-32) were selected for the trial seat upholstery material. A sensory test was conducted on the degree of sideways collapse. Sensory evaluation was performed according to the following five-level evaluation criteria, and the most frequent value was used as the evaluation result.
<Evaluation Criteria for Prevention of Horizontal Falling>
◎: Hardly falls sideways ○: Slightly does not fall sideways △: Can't say either way ×: Falls sideways

(7) Designability Ten monitors (female, age 22-32) were selected for the trial seat upholstery material, and a questionnaire was given to each of the monitors about the designability by hiding the details. Sensory evaluation was performed according to the following five-level evaluation criteria, and the most frequent value was used as the evaluation result.
<Evaluation criteria for designability>
◎: Excellent designability 〇: Excellent designability △: Neither can be said ×: No designability

(8) Change in Appearance A man wearing jeans and weighing 60 to 65 kg sat on the seat prepared in (4) above and performed desk work for a total of 50 hours, and the change in appearance after use was evaluated according to the following evaluation criteria. .
<Evaluation Criteria for Changes in Appearance>
⊚: No change in appearance at all. ◯: Slight fluffing observed, but little change in appearance.

[Example 1]
Using a double raschel knitting machine equipped with 6 reeds, 22 gauge, with a hook distance of 6 mm, false twisted textured yarn of polyethylene terephthalate fiber of 167 decitex 48 filaments from 2 reeds (L2, L3) forming the knitted fabric of the surface layer. are aligned and supplied in a 1-out 1-in (L2) and 1-in 1-out (L3) arrangement, and 1 monofilament of 110 decitex polyethylene terephthalate fiber is supplied from one reed (L4) that forms the connecting part. In addition, the two reeds (L5, L6) forming the knitted fabric of the back layer are supplied in an arrangement of 167 decitex 48 filaments of polyethylene terephthalate fiber false twisted yarn, both in an all-in arrangement. supplied.
A three-dimensional knitted greige fabric was knitted with a knitting structure shown below at a density of 35 courses/2.54 cm. The obtained greige fabric was stretched by 1% and dry heat set at 175° C. for 1 minute at an overfeed rate of 0% to obtain a three-dimensional knitted fabric. On the other hand, using a sewing machine (HZL-EX7) manufactured by JUKI Corporation, sewing machine needle No. 14 (manufactured by Organ Co., Ltd.), and polyester No. 50 as embroidery thread, a vertical 8.0 cm × horizontal 4.0 cm as shown in FIG. A 5 cm diamond pattern was embroidered to make a seat upholstery material. Various physical properties of this seat covering material are shown in Table 1 below.
(knitted structure)
L1:-
L2: 1011/2322/
L3: 2322/1011/
L4: 3410/4367/
L5: 0001/1110/
L6: 2234/2210/

[Example 2]
A three-dimensional knitted fabric was obtained in the same manner as in Example 1, using a sewing machine (HZL-EX7) manufactured by JUKI Corporation, sewing machine needle No. 16 (manufactured by Organ Co., Ltd.), and polyester No. 30 as embroidery thread. A stripe pattern with a width of 4.7 cm was embroidered as shown in Fig. 2 to obtain a seat upholstery material. Various physical properties of this seat covering material are shown in Table 1 below.

[Example 3]
Using a double raschel knitting machine equipped with 6 reeds, 22 gauge, with a hook distance of 6 mm, false twisted textured yarn of polyethylene terephthalate fiber of 167 decitex and 144 filaments from the two reeds (L2, L3) forming the knitted fabric of the surface layer. are aligned and supplied in a 1-out 1-in (L2) and 1-in 1-out (L3) arrangement, and 1 monofilament of 110 decitex polyethylene terephthalate fiber is supplied from one reed (L4) that forms the connecting part. In addition, the two reeds (L5, L6) forming the knitted fabric of the back layer are supplied in an arrangement of 167 decitex 48 filaments of polyethylene terephthalate fiber false twisted yarn, both in an all-in arrangement. supplied.
A three-dimensional knitted greige fabric was knitted with a knitting structure shown below at a density of 35 courses/2.54 cm. The obtained greige fabric was stretched by 1% and dry heat set at 175° C. for 1 minute at an overfeed rate of 0% to obtain a three-dimensional knitted fabric. On the other hand, using a sewing machine (HZL-EX7) manufactured by JUKI Corporation, sewing machine needle No. 14 (manufactured by Organ Co., Ltd.), and polyester No. 50 as embroidery thread, a length 4.3 cm x width 2.0 cm as shown in FIG. A 5 cm checkered pattern was embroidered and used as a seat upholstery material. Various physical properties of this seat covering material are shown in Table 1 below.
(knitted structure)
L1:-
L2: 2133/4533/
L3: 3422/1022/
L4: 4521/4367/
L5: 0001/1110/
L6: 2234/2210/

[Example 4]
Using a double raschel knitting machine equipped with 6 reeds, 22 gauge, with a hook distance of 6 mm, false twisted textured yarn of polyethylene terephthalate fiber of 167 decitex 48 filaments from 2 reeds (L2, L3) forming the knitted fabric of the surface layer. are aligned and supplied in a 1-out 1-in (L2) and 1-in 1-out (L3) arrangement, and 1 monofilament of 110 decitex polyethylene terephthalate fiber is supplied from one reed (L4) that forms the connecting part. In addition, the two reeds (L5, L6) forming the knitted fabric of the back layer are supplied in an arrangement of 167 decitex 48 filaments of polyethylene terephthalate fiber false twisted yarn, both in an all-in arrangement. supplied.
A three-dimensional knitted greige fabric was knitted with a knitting structure shown below at a density of 35 courses/2.54 cm. The obtained greige fabric was stretched by 1% and dry heat set at 175° C. for 1 minute at an overfeed rate of 0% to obtain a three-dimensional knitted fabric. On the other hand, using a sewing machine (HZL-EX7) manufactured by JUKI Corporation, a sewing machine needle No. 18 (manufactured by Organ Co., Ltd.), and polyester No. 8 as a sewing thread, a length 5.0 cm x width as shown in Fig. 4 is sewn by lockstitching. A 4.0 cm diamond pattern was applied to obtain a seat covering material. Various physical properties of this seat covering material are shown in Table 1 below.
(knitted structure)
L1:-
L2: 1011/1233/4544/4322/
L3: 4544/4322/1011/1233/
L4: 3410/3245/2145/2310/
L5: 0001/1110/
L6: 2234/2210/

[Example 5]
A three-dimensional knitted fabric was obtained in the same manner as in Example 4 except that the obtained gray fabric was stretched by 15% and dry heat set at 175 ° C. for 1 minute at an overfeed rate of 0%. Using a sewing machine (HZL-EX7), a sewing machine needle No. 14 (manufactured by Organ Co., Ltd.), and polyester No. 50 as a sewing thread, a rectangular embroidery as shown in FIG. 5 was performed to obtain a seat covering material. Various physical properties of this seat covering material are shown in Table 1 below.

[Example 6]
A three-dimensional knitted fabric was obtained in the same manner as in Example 1 except that the density was 39 courses / 2.54 cm, and a sewing machine (HZL-EX7) manufactured by JUKI Corporation and a sewing machine needle No. 14 (manufactured by Organ Co., Ltd.). Using polyester No. 50 as embroidery thread, a lattice pattern of 4.3 cm length×2.5 cm width as shown in FIG. 3 was embroidered to obtain a seat covering material. Various physical properties of this seat covering material are shown in Table 1 below. Various physical properties of this seat covering material are shown in Table 1 below.

[Example 7]
A three-dimensional knitted fabric was obtained in the same manner as in Example 1, using a sewing machine (HZL-EX7) manufactured by JUKI Corporation, a sewing machine needle No. 14 (manufactured by Organ Co., Ltd.), and polyester No. 50 as a sewing thread, with a length of 10 cm. A seat upholstery material was obtained by performing straight stitching in only one place. Various physical properties of this seat covering material are shown in Table 1 below.

[Example 8]
A three-dimensional knitted fabric was obtained in the same manner as in Example 1, and a sewing machine (HZL-EX7) manufactured by JUKI Corporation, a sewing machine needle No. 18 (manufactured by Organ Co., Ltd.), and polyester No. 8 as a sewing thread were sewn. A diamond pattern of 2.0 cm in length×1.0 cm in width as shown in FIG. 4 was applied to obtain a seat covering material. Various physical properties of this seat covering material are shown in Table 1 below.

[Example 9]
A three-dimensional knitted fabric was obtained in the same manner as in Example 4 except that the obtained gray fabric was stretched by 10% and dry heat set at 175 ° C. for 1 minute at an overfeed rate of 0%. Using a sewing machine (HZL-EX7), sewing needle No. 14 (manufactured by Organ Co., Ltd.), and polyester No. 50 as sewing thread, a diamond pattern of vertical 8.0 cm × horizontal 4.5 cm as shown in Figure 1 is embroidered. Used as a seat cover material. Various physical properties of this seat covering material are shown in Table 1 below.

[Example 10]
A three-dimensional knitted fabric was obtained in the same manner as in Example 1 except that the density was 39 courses / 2.54 cm, and a sewing machine (HZL-EX7) manufactured by JUKI Corporation and a sewing machine needle No. 14 (manufactured by Organ Co., Ltd.) were used. ), using polyester No. 50 as a sewing thread, a 4.3×2.5 cm lattice pattern as shown in FIG. 3 was embroidered to obtain a seat covering material. Various physical properties of this seat covering material are shown in Table 1 below.

[Comparative Example 1]
A three-dimensional knitted fabric was obtained in the same manner as in Example 1 and used as a seat upholstery material without performing embroidery or sewing. Various physical properties of this seat covering material are shown in Table 2 below.

[Comparative Example 2]
A three-dimensional knitted fabric was obtained in the same manner as in Example 3 and used as a seat covering material without performing embroidery or sewing. Various physical properties of this seat covering material are shown in Table 2 below.

[Comparative Example 3]
A three-dimensional knitted fabric was obtained in the same manner as in Example 4 and used as a seat cover material without performing embroidery or sewing. Various physical properties of this seat covering material are shown in Table 2 below.

The seat upholstery material of the present invention, while maintaining cushioning properties, prevents the connecting yarns from falling sideways, which is a problem of conventional three-dimensional knitted fabrics, and is also excellent in design and slip resistance. It can be suitably used for seats, headrests, and armrests for vehicles such as automobiles, railway vehicles, aircraft, child seats, strollers, and wheelchairs.

Claims (5)

A seat skin material comprising a three-dimensional knitted fabric composed of a two-layered knitted fabric consisting of a surface layer and a back layer, and a connecting yarn that connects the two-layered knitted fabric, wherein at least one layer of the three-dimensional knitted fabric is provided. A seat upholstery material that is embroidered or sewn on the opposite side, and has at least one joint where a front knitted fabric and a back knitted fabric are joined by the embroidery or sewing. The seat upholstery material according to claim 1, wherein an average peak height of the three-dimensional knitted fabric starting from the joint portion is 1300 µm or more and 5000 µm or less. 3. The seat upholstery material according to claim 1, wherein the joint portion has an area ratio of 10 to 70% in a range of 18 mm×24 mm centering on a portion of the joint portion where the thread density is the highest. The seat covering material according to any one of claims 1 to 3, wherein the knitted fabric of the surface layer contains multifilaments, and the stitch density of the knitted fabric of the surface layer is 11,000 to 21,000. A seat comprising the seat covering material according to any one of claims 1 to 4.

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