JP4340447B2 - Seat and vehicle - Google Patents

Description

【００３９】
比較例２
実施例４において、打ち込みを１０．２コース／インチとした以外は、実施例１と同様にして、表１の物性を有する立体編物を得た。
【００４０】
比較例３
１６７デシテックス３００フィラメントのポリエチレンテレフタレート仮撚加工糸（Ｚ仮撚糸、黒色先染め糸）を４本合せて１００回／ｍの撚数でＳ方向に合撚し、６６８デシテックス／１２００フィラメントのポリエチレンテレフタレート合撚糸（撚数１００回／ｍ）を得た。
実施例４において、表側の編地を形成する２枚の筬（Ｌ₁ 、Ｌ₂ ）から前記６６８デシテックス／５７６フィラメントのポリエチレンテレフタレートの合撚糸（撚数１００回／ｍ）を供給した以外は、実施例４と同様にして、表１の物性を有する立体編物を得た。
【００４１】
比較例４
１６７デシテックス１５フィラメントのポリエチレンテレフタレート仮撚加工糸（Ｚ仮撚糸、黒色先染め糸）を４本合せて１００回／ｍの撚数でＳ方向に合撚し、６６８デシテックス／６０フィラメントのポリエチレンテレフタレート合撚糸（撚数１００回／ｍ）を得た。
実施例４において、表側の編地を形成する２枚の筬（Ｌ₁ 、Ｌ₂ ）から前記６６８デシテックス／６０フィラメントのポリエチレンテレフタレート合撚糸（撚数１００回／ｍ）を供給し、連結糸を形成する筬（Ｌ₃ 、Ｌ₄ ）から参考例で製造した７７０デシテックスのポリトリメチレンテレフタレートモノフィラメントを供給した以外は、実施例４と同様にして、表１の物性を有する立体編物を得た。
【００４２】
【表１】

【００４３】
表１から、実施例１〜７で得られた立体編物は、その表側編地の単糸繊度が１〜１０デシテックス、開口率が３５％以下およびテーバー摩耗が２級以上であるため、優れた表面風合いとクッション感を有し、かつ長期間使用に対する外観変化の少ない座席が得られることが確認された。
これに対し、比較例１では開口率が高すぎるため、表面風合いに劣り、長期使用に対する外観変化が大であった。また比較例２では編目緻密度が４０００未満であるため、比較例３では表側編地の単糸繊度が小さすぎるため、長期使用に対する外観変化が大であった。さらに比較例４では表側編地の単糸繊度が大きすぎるため、表面風合いおよびクッション感に劣るものであった。
【００４４】
【発明の効果】
本発明の座席は、フレームに特定の特性を有する立体編物が張設されているため、ソフトな表面風合とソフトな弾力感を有し、かつ耐摩耗性に優れ、長期間使用しても外観変化が少なく、従って、家具用、事務用等に使用する座席のみならず、自動車、鉄道車両、航空機、チャイルドシート、ベビーカー、車椅子等の車両用の座席として好適に用いることができる。
【図面の簡単な説明】
【図１】本発明の一実施例を示す座席の模式図。
【図２】立体編物の荷重−変位曲線を示す図。
【符号の説明】
１…座席、２…立体編物、３…パイプフレーム、４…押さえ部材。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat and a vehicle, and more specifically, a seat portion and a back portion of a seat in which a three-dimensional knitted fabric is stretched on a frame have a soft surface texture and a soft feeling of elasticity, and have excellent wear resistance and a long period of time. The present invention relates to a seat suitable for automobiles, railcars, airplanes, child seats, strollers, wheelchairs, furniture, office work, etc., and vehicles using the same.
[0002]
[Prior art]
In recent years, two-layer knitted fabric and two-layer knitted fabric are used as seats with functions such as recyclability, breathability, and vibration absorption for seats with urethane sheets covered with foamed urethane. There has been proposed a seat in which a solid knitted fabric composed of connecting yarns to be connected is stretched around a frame to form a seat and / or a back.
For example, a seat has been proposed in which a three-dimensional knitted fabric in which an upper mesh layer and a lower mesh layer are joined with a pile (connecting yarn) is stretched on a seat frame (see, for example, Patent Document 1). However, although the three-dimensional knitted fabric used for this seat is made of a relatively thick connecting yarn of 380 denier or more, and the single filament fineness of the multifilament yarn used for the front side knitted fabric is thick, the wear resistance is good. The seat lacked a soft surface texture and soft elasticity. Also, the total thickness of the yarns constituting the stitch is 500 denier or more, the front stitch is composed of one or more ground knitting yarns and one or more fastening yarns, and the connecting yarns are fastened to the ground knitting yarns by this fastening yarn. Therefore, there has been proposed a three-dimensional knitted fabric having good tactile sensation, texture and good cushioning properties by suppressing the jumping of the connecting yarn (see, for example, Patent Document 2). However, this three-dimensional knitted fabric has improved texture and hair removal from the garment of the seated person, but the surface texture, soft elasticity, and wear resistance of the three-dimensional knitted fabric are insufficient. No consideration has been given to these characteristics of the seats that are stretched.
[0003]
[Patent Document 1]
JP 2002-219985 A
[Patent Document 2]
JP 2001-234456 A
[0004]
[Problems to be solved by the invention]
An object of the present invention is to solve the above-mentioned technical problems, and in a seat in which a three-dimensional knitted fabric is stretched on a frame, a soft surface texture and soft elasticity can be obtained, and it has excellent wear resistance and is used for a long time. It is still another object of the present invention to provide a seat with little change in appearance and a vehicle using the seat.
[0005]
[Means for Solving the Problems]
The inventor of the present invention, as a result of earnestly examining the opening ratio of the front knitted fabric of the three-dimensional knitted fabric used for the seat, the stitch density, the surface elongation rate, the degree of convergence of the multi yarn used for the front knitted fabric, the compression characteristics of the three-dimensional knitted fabric, The present inventors have found that the above-mentioned problems can be achieved by using a knitted fabric having a specific opening ratio and a Taber abrasion using a multi-yarn having a specific single yarn fineness as the front knitted fabric of a three-dimensional knitted fabric.
That is, the invention claimed in the present application is as follows.
[0006]
(1) A seat in which a three-dimensional knitted fabric composed of two layers of front and back knitted fabrics and a connecting yarn that connects the two layers of knitted fabric is stretched on a frame to form a seat and / or a back portion, and the three-dimensional knitted fabric ofThe compression modulus is 20 to 150 N / mm,The front side knitted fabric was formed with multi yarns with a single yarn fineness of 1-10 dtex,0-35%Consisting of a dense organization ofThe stitch density of the front side knitted fabric is 4000 to 11000,In addition, the Taber abrasion of the front knitted fabric measured by the Taber rotary rear bracer method is2-5A seat characterized by being.
(2)The connecting yarn of the three-dimensional knitted fabric is a monofilament of 130 to 500 dtex, the front knitted fabric is a polyethylene terephthalate fiber multi-yarn having a thickness of 50 to 2000 dtex and a single yarn fineness of 1 to 10 dtex, and a warp knitting of 9 to 28 gauge A three-dimensional knitted fabricThe seat according to (1), characterized in that:
(3) The seat according to (1) or (2), wherein the surface stretch rate of the front knitted fabric of the three-dimensional knitted fabric is 1 to 20%.
(4) The multi yarn on the front side knitted fabric of the three-dimensional knitted fabric is a twisted yarn, an air mixed yarn or a fluid injection processed yarn.(1)-(3)A seat according to any of the above.
(5) A vehicle provided with the seat according to any one of (1) to (4).
[0007]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, the present invention will be described in detail.
  In the present invention, a three-dimensional knitted fabric is used for the seat and / or the back of the seat, and the three-dimensional knitted fabric includes a front and back two-layer knitted fabric (a front knitted fabric and a back knitted fabric) and the two-layer knitted fabric. Consists of connecting yarns to be connected.
  The front knitted fabric of the three-dimensional knitted fabric used in the present invention is formed of multi-yarns having a single yarn fineness of 1 to 10 dtex, preferably 1 to 6 dtex, and more preferably 3 to 6 dtex, and the open area ratio is0-35%,Preferably0-25%, More preferably0-10%It is necessary to have a dense organization.
[0008]
If the single yarn fineness of the multi yarn is less than 1 dtex, it will be extremely fuzzy when used for a long time, and the appearance will change drastically. Hard and uncomfortable. When the opening ratio of the front side knitted fabric exceeds 35%, it becomes a structure such as a mesh structure, and although the refreshing feeling and the anti-steaming property are improved, the surface is rough, the surface texture is lowered, and the load such as friction is applied to the mesh. Because it concentrates on the stitches, the fluff is severe after long-term use and the appearance changes greatly. By suppressing the hole area ratio of the front side knitted fabric to 35% or less, it is possible to reduce the load such as friction from being concentrated on the stitches and to suppress fuzz during long-term use.
[0009]
Here, the multi-yarn refers to a fiber in which a large number of single fibers such as filament yarns and spun yarns are converged and assembled in an untwisted, twisted state, entangled state, or unentangled state. In addition, the hole area ratio refers to the area ratio of the holed portion in the layer forming the knitted fabric surface.
In order to obtain a fine knitted structure with a surface area knitted fabric with a hole area ratio of 35% or less, a dense structure such as a half structure, a back half structure, a quinds cord structure, a double cord structure, a double atlas structure, a shark skin structure, etc. It is preferable to form with a structure with few parts or a mesh structure with small apertures. Fineness of multi-yarn used for the front side knitted fabric, knitting structure, knitting machine gauge, on-machine course, width-up at finishing Etc. must be set to appropriate conditions. In addition, it is more preferable that the front side knitted fabric is imparted with a colored yarn pattern, a concavo-convex pattern, a jacquard pattern, a small perforated pattern, etc., because the design is improved.
[0010]
Further, the front side knitted fabric of the above-mentioned three-dimensional knitted fabric needs to have a Taber abrasion measured by the Taber rotary rear bracer method of 2nd grade or more, preferably 3rd grade or more. If the Taber wear is less than 2nd grade, the appearance change such as fuzzing is severe, and long-term use becomes difficult.
In order to make the Taber abrasion level 2 or higher, it is preferable that the convergence of the multi-yarn used for the front knitted fabric is improved. Examples of methods for improving convergence include a method of imparting twist at the yarn stage, a method of entanglement of single fibers by air entanglement or fluid injection processing, a method of performing resin processing at the yarn or knitted fabric stage, and the like. . In the case of a twisted yarn, the twist coefficient K is preferably in the range of 2000 to 10,000. In the case of air entanglement, the number of entanglements is preferably 50 / m or more.
The twist coefficient K is calculated by the following formula.
K = T × D^0.5
(Where K is the twist coefficient, T is the number of twists (times / m), D is the fineness (decitex))
[0011]
Moreover, from the point which makes a Taber abrasion 2nd grade or more, it is preferable that the surface side knitted fabric is 4000-11000 of the stitch density M which shows the tightness of one stitch represented by the following Formula, More preferably, 5000- 10,000. When the density of the stitch is less than 4000, the single yarn of the multi-yarn forming the stitch is easily moved by an external force such as friction, and becomes fuzzy. On the other hand, if it exceeds 11,000, the single yarn becomes difficult to move, but the soft texture is hindered.
M = N × D^0.5
(However, N is 6.45cm.²Number of stitches per front side knitted fabric (pieces), D is the total fineness (decitex) of multi yarn forming one stitch of the front side knitted fabric)
[0012]
Furthermore, in order to improve the Taber abrasion property and to give a soft elasticity, it is preferable that the surface elongation rate of the front side knitted fabric is 1 to 20%. The surface elongation rate of the front side knitted fabric referred to here indicates the ease of tissue deformation of the front side knitted fabric, and can be measured by the method described later. When the surface stretch rate of the front knitted fabric exceeds 20%, a soft elasticity can be obtained, but the front knitted fabric is likely to undergo structural deformation. Therefore, external forces such as friction acting on the knitted fabric surface undergo structural deformation. It becomes easy to concentrate on the local area of the taper, and the Taber wear resistance decreases. On the other hand, when the surface elongation is less than 1%, the Taber wear resistance is improved, but the front side knitted fabric is difficult to undergo structural deformation, so that a soft elasticity cannot be obtained. The surface stretch rate of the front knitted fabric is adjusted by factors such as the fineness of the multi-yarn that forms the front knitted fabric, the knitting structure, the knitting density, and the tentering rate at the finish processing. Is preferred.
[0013]
The front knitted fabric and the back knitted fabric of the three-dimensional knitted fabric used in the present invention include polyester fibers such as polyethylene terephthalate fibers, polytrimethylene terephthalate fibers, polybutylene terephthalate fibers, polyamide fibers, polyacrylic fibers, and polypropylene fibers. Synthetic fibers such as fibers, natural fibers such as cotton, hemp, and wool, and fibers such as recycled fibers such as cupra rayon, viscose rayon, and lyocell can be used. The cross-sectional shape of the fiber is not particularly limited, and is round, triangular, L-shaped, T-shaped, Y-shaped, W-shaped, eight-leaf shaped, flat-shaped, flat-shaped, dog-bone shaped, etc. It may be irregular. There is no restriction | limiting in particular in the form of a fiber, You may use any of bulky processed yarns, such as an original yarn, a spun yarn, a twisted yarn, a false twisted yarn, an air entangled yarn, and a fluid injection processed yarn.
[0014]
As described above, it is necessary to use a multi-yarn having a specific single yarn fineness for the front side knitted fabric, but a multi-yarn or a yarn other than the multi-yarn can be used for the back side knitted fabric. In order to increase the coverage so that the monofilament yarn of the connecting yarn which will be described later is not exposed to the surface of the knitted fabric, it is preferable to use a bulky yarn such as false twisted yarn or spun yarn of multifilament yarn. Further, the front side knitted fabric needs to have a dense structure with an aperture ratio of 35% or less, but the back side knitted fabric can have any knitted structure, for example, a mesh knitted fabric such as quadrangular or hexagonal, or a marquette knitted fabric A knitted fabric having a plurality of apertures such as ground may be used to improve lightness and air permeability. The fineness of the multi-yarn used for the front and back knitted fabrics can usually be 50 to 2000 decitex, and the number of filaments can be arbitrarily set.
In order to improve the linearity of the compression-displacement characteristics of the stretched three-dimensional knitted fabric, reduce hysteresis loss, and make a seat with good vibration absorption without being influenced by human weight, at least the back knitted fabric Furthermore, it is preferable to knit monofilament yarns with a structure that forms stitches or a structure that does not form stitches. If the monofilament yarn is polytrimethylene terephthalate fiber, it is more preferable because it leads to a reduction in hysteresis loss and an improvement in settling of the stretched three-dimensional knitted fabric.
[0015]
The front and back knitting structures of the three-dimensional knitted fabric do not need to be the same, and may have different knitting structures and different elongation characteristics, but the surface elongation rate of the back side knitted fabric is smaller than the surface elongation rate of the front side knitted fabric. When a person sits down, a feeling of elasticity due to the monofilament yarn of the connecting yarn is added, and the fit to the human body is also improved. At this time, it is preferable to insert the insertion yarn linearly in the vertical direction or the horizontal direction into the knitted fabric on the back side of the three-dimensional knitted fabric because the surface elongation recovery property of the knitted fabric on the back side can be improved.
[0016]
A monofilament yarn or a multifilament yarn can be used as the connecting yarn fiber of the three-dimensional knitted fabric used in the present invention, but the monofilament yarn is used from the viewpoint of making the compression elastic modulus of the three-dimensional knitted fabric an appropriate hardness and improving the compression recovery property. It is preferable. As the fiber material used for the connecting yarn, it is possible to use fibers of any material such as polytrimethylene terephthalate fiber, polybutylene terephthalate fiber, polyethylene terephthalate fiber, polyamide fiber, polypropylene fiber, polyvinyl chloride fiber, and polyester elastomer fiber. it can. Among these, it is preferable to use polytrimethylene terephthalate fiber in at least 50% by weight or more of the connecting yarn because it has a cushioning property with elasticity and the durability of the cushioning property after repeated or long-time compression becomes good. The cross-sectional shape of the fiber may be round, triangular, L-shaped, T-shaped, Y-shaped, W-shaped, Yaba-shaped, flat-shaped, dog-bone-shaped, etc., multi-leafed, hollow, irregular However, a round cross section is preferable for improving the durability of the cushioning property of the three-dimensional knitted fabric. In order to prevent the harsh sound that occurs when the connecting yarns rub against each other when the three-dimensional knitted fabric is compressed, monofilament yarns and multifilament yarns are used together as the connecting yarns by cross knitting, yarn composite, etc. It is preferable to use the yarn as a cushioning material.
[0017]
The monofilament yarn used for the connecting yarn has an arbitrary fineness, but in order to obtain a soft elasticity, it is preferable to use a yarn having a thickness of 130 to 500 dtex, more preferably 200 to 400 dtex. If there is a relationship of T / d ≦ 0.9 between the fineness T (decitex) of the monofilament yarn applied to one needle of the knitting machine and the fineness d (decitex) of all multi-yarns, the monofilament yarn is converted into the multi-yarn. The monofilament yarn is prevented from being exposed to the surface of the three-dimensional knitted fabric, and the surface of the three-dimensional knitted fabric is prevented from being glittered by the gloss inherent to the monofilament yarn, and the surface texture can be improved.
[0018]
The monofilament yarn used for the three-dimensional knitted fabric is preferably colored. Coloring methods include dying uncolored yarn in the form of skein or cheese (dyeing), coloring by mixing pigments, dyes, etc. in the stock solution before spinning (dye solution coloring), dyeing in three-dimensional knitting A printing method or the like is used. When dyeing in a three-dimensional knitted form, it may be difficult to maintain the three-dimensional shape or the workability may be poor.
[0019]
The three-dimensional knitted fabric used in the present invention is knitted by a warp knitting machine, a circular knitting machine, a flat knitting machine or the like having two rows of opposing needle beds, and the gauge of the knitting machine is preferably 9 to 28 gauge.
The connecting yarn may form loop-like stitches in the front and back knitted fabrics, or may be a structure that is hooked on the front and back knitted fabrics in an inserted state or a tucked state, but at least two connecting yarns form the front and back knitted fabrics. Inclining obliquely in opposite directions and connecting them in a cross shape (X shape) or a truss shape is preferable for improving the form stability of the three-dimensional knitted fabric and obtaining a good cushion feeling as a seat. At this time, both the cross-like and truss-like connecting yarns may be composed of two connecting yarns, and one identical connecting yarn may be folded back on the front or back surface to be apparently two. May be.
[0020]
The thickness and basis weight of the three-dimensional knitted fabric can be arbitrarily set according to the purpose, but the thickness is preferably 3 to 20 mm. When the thickness is less than 3 mm, the cushioning property may be deteriorated. When the thickness exceeds 20 mm, knitting and finishing of the three-dimensional knitted fabric may be difficult. The basis weight is preferably 500 to 2000 g / m.², More preferably 600-1500 g / m²It is.
As for the finishing method of a three-dimensional knitted fabric, in the case of a three-dimensional knitted fabric using a pre-dyed yarn or a stock solution colored yarn, the raw machine can be finished through processes such as scouring and heat setting. In the case of a three-dimensional knitted fabric in which either the connecting yarn or the yarn used for the knitted fabric constituting the front and back is uncolored, the green machine can be finished through processes such as pre-setting, scouring, dyeing and heat setting.
[0021]
The finished three-dimensional knitted fabric is used for the seat and / or the back of the seat as a desired shape by processing the end by means of welding, sewing, resin processing, or by thermoforming.
In order for the seat of the present invention to have a soft elasticity, it is preferable that the compression elastic modulus of the three-dimensional knitted fabric is 20 to 150 N / mm. More preferably, it is 25-100 N / mm, More preferably, it is 25-80 N / mm. If the compression modulus exceeds 150, a soft elastic feeling cannot be obtained, and if it is less than 20, a feeling of bottoming is likely to occur when seated. The compression elastic modulus of a three-dimensional knitted fabric is adjusted by factors such as the fineness of the connecting yarns constituting the three-dimensional knitted fabric, the number of connecting yarns per unit area, the inclination angle of the connecting yarn, the thickness of the three-dimensional knitted fabric, and the heat set temperature during finishing. These are preferably set appropriately.
[0022]
In the seat of the present invention, the three-dimensional knitted fabric is stretched on a frame to form a seat portion and / or a back portion. FIG. 1 is a schematic view of a seat showing an embodiment of the present invention. In FIG. 1, a seat 1 includes a pipe frame 3 molded into a predetermined seat shape, a three-dimensional knitted fabric 2 cut into a predetermined shape of a seat portion and a back portion, and the three-dimensional knitted fabric 2 stretched between the seat portion and the back portion. And holding member 4 to be fixed.
The state in which the three-dimensional knitted fabric is stretched on the frame is not particularly limited, and the seat of the seat is fixed with the periphery or at least two sides of the three-dimensional knitted fabric fixed to the back or the frame of the seat in a tensioned state or a relaxed state. What is necessary is just to form a part and a back part. Any method can be used for fixing the three-dimensional knitted fabric to the frame. For example, as described in JP-A-2002-219985, a plate member having a groove portion with a substantially U-shaped cross section at the end of the three-dimensional knitted fabric is used. A method of engaging the groove portion of the plate member with an appropriate frame material, or connecting a trim cloth to the end of the three-dimensional knitted fabric, and fixing the plate member to the trim cloth to form an appropriate frame material A method of engaging, a method of fixing the end portion of the three-dimensional knitted fabric by welding, sewing, resin processing, etc., and then pressing the end portion with a pressing member and fixing to the frame by bolting or the like can be used. In addition, a two-dimensional elastic knitted fabric may be further provided under the three-dimensional knitted fabric to improve the spring feeling.
[0023]
The seat of the present invention has a soft surface texture and soft elasticity at its seat and back, is excellent in wear resistance, and has little change in appearance even after long-term use. It can be suitably used for a vehicle seat such as a vehicle, an aircraft, a child seat, a stroller, and a wheelchair.
[0024]
【Example】
Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited thereto. Various physical properties of the three-dimensional knitted fabric were measured by the following methods.
1) Opening ratio H (%): A 2cm square enlarged photograph (5x) of the front side knitted fabric of a three-dimensional knitted fabric was taken from a right angle direction, and the photograph was read into a computer with an image scanner, and a high-definition image analysis system IP1000PC Using the image analysis software (trade name, manufactured by Asahi Kasei Co., Ltd.), specify the area of the opening where the front knitted fabric (including the front yarn and the connecting yarn) is not formed, and open the area that covers the entire area (2 cm square) The ratio of the area of the hole is calculated by the ratio of the number of pixels shown in the following equation.
H (%) = G × 100 / A
Where G is the number of pixels in the aperture, and A is the number of pixels of 2 cm square
[0025]
2) Taber wear: According to JASOM403 A method (Taber rotor rear bracer method), wear with a CS-10 wear wheel 1000 times at a load of 4.9 N and a speed of 70 rpm using a Taber type wear tester. After the test, the surface of the test piece is observed for wear and the following grade is determined.
Grade 5: No change in surface condition
Grade 4: Slightly fuzzy
3rd class: Lots of fluff
2nd grade: There is a lot of fluff and the thread is thin
Level 1: There is a thread break
[0026]
3) Surface elongation rate S (%): Cut the connecting yarn of the solid knitted fabric (41 cm square) and separate the front knitted fabric. A square plate-shaped metal frame with legs 15cm high at the four corners and an inner diameter of 30cm and an outer diameter of 41cm per side (No. 40 sandpaper is attached to the upper surface to provide anti-slip properties) And the front knitted fabric of the three-dimensional knitted fabric is loosened between a rectangular plate-shaped metal frame with an inner diameter of 30 cm and an outer diameter of 41 cm (adding sandpaper No. 40 on the lower surface to provide slip resistance) Clamp the surrounding area with a vise.
Using a Shimadzu Autograph AG-B type (manufactured by Shimadzu Corp.), the center part of the stretched front side knitted fabric is compressed at a speed of 100 mm / min with a disk-shaped compression jig with a diameter of 100 mm, and the displacement when a load of 245 N is applied Is measured as the compression deflection amount B (mm). Furthermore, the surface elongation rate of the front knitted fabric is obtained by the following formula.
S (%) = {(150²+ B²)^0.5−150} × 100/150
[0027]
4) Compression elastic modulus E (N / mm): 15 cm square, thickness T0 (mm) placed on a rigid surface using a Shimadzu autograph AG-B type (manufactured by Shimadzu Corporation) with a disk-shaped compression jig having a diameter of 100 mm ) Is compressed to a load of 250 N at a speed of 10 mm / min, and immediately released at a speed of 10 mm / min. In the load-displacement curve shown in FIG. 2 obtained at this time, the inclination of the substantially linear region of the rising portion of the going (compression) curve is expressed by the expression {load P (N)} / {displacement ε (mm)}. Calculated and set as the compression elastic modulus E (N / mm).
5) Surface texture: A solid knitted fabric 2 with four corners cut is stretched on a pipe frame 3 having a seat portion shown in FIG. 1 having a width of 50 cm, a depth of 50 cm, and a back portion of 40 cm so as not to loosen. A seat is prepared by holding four sides of the knitted fabric and fixing it with bolts. The fingertip is slid lightly on the surface of the three-dimensional knitted fabric stretched on the seat 1, and the surface texture is evaluated by sensory evaluation.
A: Very soft and soft to the touch
○: Soft and slightly soft to the touch
△: Hard and slightly unsatisfactory
X: very hard and unpleasant to the touch
[0028]
6) Elasticity: Lightly press the three-dimensional knitted fabric stretched on the seat produced in 5) with a fingertip (index finger, middle finger, ring finger), and evaluate the elasticity by sensory evaluation.
A: Very soft elasticity and good cushioning
○: Slightly good cushioning due to soft elasticity
△: Hard elasticity and slightly cushioning
×: Very hard elasticity and poor cushioning
7) Change in appearance after use: A man with a weight of 60 to 65 kg wearing jeans sits on the seat prepared in 5) and performs desk work for a total of 50 hours to evaluate the appearance after use.
A: The appearance does not change at all
○: Slight fuzz is recognized, but there is little change in appearance.
Δ: Slightly fuzzy and a slight change in appearance
X: The fuzz is intense and the appearance changes drastically
[0029]
The polytrimethylene terephthalate monofilament yarn in the examples was produced by the following method.
Polytrimethylene terephthalate having an intrinsic viscosity [η] = 0.9 was discharged from the spinning nozzle at a spinning temperature of 265 ° C. This was led into a cooling bath at 40 ° C., and while being cooled, it was pulled by a first roll group at a speed of 16.0 m / min to obtain a thinned unstretched monofilament yarn. Next, the film was pulled by a second roll group of 80.0 m / min while being stretched 5 times in a stretching bath at a temperature of 55 ° C., and then subjected to a relaxation heat treatment in a steam bath at 120 ° C., and 72.0 m / min. After passing through the third roll group, it was wound with a winder having the same speed as that of the third roll group to produce a drawn monofilament yarn of 390 dtex. Similarly, a 770 dtex drawn monofilament yarn was produced. The intrinsic viscosity [η] (dl / g) is a value obtained based on the definition of the following formula.
[Η] = lim (ηr−1) / C
C → 0
Ηr in the definition is obtained by dividing the viscosity of a diluted solution of polytrimethylene terephthalate yarn or polyethylene terephthalate yarn dissolved in an o-chlorophenol solvent with a purity of 98% or more at 35 ° C. by the viscosity of the solvent measured at the same temperature. Which is defined as relative viscosity. C is the polymer concentration expressed in g / 100 ml.
[0030]
Example 1
Three 167 decitex 48 filament polyethylene terephthalate false twisted yarns (Z false twist yarn, black dyed yarn) are twisted in the S direction at a twist rate of 100 turns / m, and 500 decitex 144 filament polyethylene terephthalate twisted yarn. (Twist number 100 times / m) was obtained.
Using a 14 gauge, 6 mm double raschel machine equipped with a 6-sheet reed, a reed (L₁, L₂) From the above-mentioned 500 dtex 144 filament polyethylene terephthalate twisted yarn (twisted 100 times / m) in an all-in arrangement to form a connecting yarn (L_Three390) polytrimethylene terephthalate monofilament yarn of 390 decitex produced in the reference example is supplied in an all-in arrangement, and the knitted fabric (L_Five, L₆) From 500 decitex 144 filament polyethylene terephthalate false twisted yarn (167 decitex 48 filament polyethylene terephthalate false twisted yarn, black pre-dyed yarn, 3 lines aligned) and fed in 13.5 course /2.54 cm, and a three-dimensional knitted fabric in which the connecting yarn partially forms a cross structure (× structure) with a knitting structure shown below and the front and back are dense and flat. The obtained three-dimensional knitted fabric was heat-dried at 170 ° C. for 2 minutes to obtain a three-dimensional knitted fabric having the physical properties shown in Table 1.
(Knitting organization)
L₁: 2322/1011 /
L₂: 1011/2322 /
L_Three: 3410/4367 /
L_Five: 1110/0001 /
L₆: 2210/2234 /
[0031]
Example 2
Three 167 dtex 48 filament polyethylene terephthalate false twisted yarns (Z false twisted yarn, black dyed yarn) are combined and twisted in the S direction at a twist rate of 200 times / m, and 500 dtex 144 filament polyethylene terephthalate twisted yarn. (Twist number 200 times / m) was obtained.
In Example 1, the ridge (L₁, L₂), The three-dimensional knitted fabric having the physical properties shown in Table 1 was obtained in the same manner as in Example 1 except that the 500 dtex 144 filament polyethylene terephthalate twisted yarn (twisted number 200 times / m) was supplied.
[0032]
Example 3
Three 167 dtex 144 filament polyethylene terephthalate false twisted yarn (Z false twisted yarn, black dyed yarn) are aligned and air entangled, and 500 dtex 432 filament polyethylene terephthalate air entangled yarn (180 entangled / m) Got.
In Example 1, the ridge (L₁, L₂) To supply the air entangled yarn to form a connecting yarn (L_Three) To 390 decitex polyethylene terephthalate monofilament yarns were used in the same manner as in Example 1 to obtain a three-dimensional knitted fabric having the physical properties shown in Table 1.
[0033]
Example 4
Four 167 decitex 48 filament polyethylene terephthalate false twisted yarns (Z false twist yarn, black dyed yarn) are combined and twisted in the S direction at a twist rate of 100 turns / m, and 668 decitex / 192 filament polyethylene terephthalate blend. A twisted yarn (twisting number 100 times / m) was obtained.
Using a 14 gauge, 6 mm double raschel machine equipped with a 6-sheet reed, a reed (L₁, L₂) To 668 decitex / 192 filament polyethylene terephthalate twisted yarn (twisted number of times 100 m)₁A 3 in 3 out array on the guide, L₂Supplied in a 3-out 3-in array to the guide, forming a connecting thread (L_Three, L_Four) To 390 decitex polytrimethylene terephthalate monofilament yarn L_ThreeA 3 in 3 out array on the guide, L_FourSupplied in a 3-out 3-in arrangement to the guide, and the heel (L_Five, L₆) From 500 decitex 144 filament polyethylene terephthalate false twisted yarn (167 decitex 48 filament polyethylene terephthalate false twisted yarn, black pre-dyed yarn, 3 lines aligned) and fed in 13.5 course At /2.54 cm, the connecting yarn partially formed a cross structure (× structure) in the knitting structure shown below, and a three-dimensional knitted fabric having a slight opening in the table was knitted. The obtained three-dimensional knitted fabric was heat-dried at 170 ° C. for 2 minutes to obtain a three-dimensional knitted fabric having the physical properties shown in Table 1.
(Knitting organization)
L₁: 1022/4355/6755/3422 /
L₂: 6755/3422/1022/4355 /
L_Three: 1010/4343/6767/3434 /
L_Four: 6767/3434/1010/4343 /
L_Five: 1110/0001 /
L₆: 2210/2234 /
[0034]
Example 5
Four 167 dtex 30 filament polyethylene terephthalate false twisted yarn (Z false twisted yarn, black dyed yarn) are combined and twisted in the S direction at a twist rate of 100 turns / m, and 668 dtex / 120 filament polyethylene terephthalate blend A twisted yarn (twisting number 100 times / m) was obtained.
In Example 4, two ridges (L₁, L₂), The solid knitted fabric having the physical properties shown in Table 1 was obtained in the same manner as in Example 4 except that the 668 decitex / 120-filament polyethylene terephthalate twisted yarn (twisted number 100 times / m) was supplied.
[0035]
Example 6
In Example 4, L₁, L_Three2 in 2 out to the guide, L₂, L_FourA three-dimensional knitted fabric having the physical properties shown in Table 1 was obtained in the same manner as in Example 4 except that the following knitting structure was supplied to the guide in a 2-out 2-in arrangement.
(Knitting organization)
L₁: 1011/3233/4544/2322 /
L₂: 4544/2322/1011/3233 /
L_Three: 1010/3232/4545/2323 /
L_Four: 4545/2323/1010/3232 /
L_Five: 1110/0001 /
L₆: 2210/2234 /
[0036]
Example 7
A 167 dtex 48 filament polyethylene terephthalate false twisted yarn (black dyed yarn) is twisted in the S direction at a twist rate of 100 turns / m to obtain a 167 dtex 48 filament polyethylene terephthalate twisted yarn (twist number 100 turns / m). It was. Also, two 167 decitex 48 filament polyethylene terephthalate false twisted yarns (Z false twist yarn, black dyed yarn) were combined and twisted in the S direction at a twist rate of 100 turns / m, and 334 decitex 96 filament polyethylene terephthalate. A twisted yarn (twisting number 100 times / m) was obtained.
Using a 14 gauge, 6 mm double raschel machine equipped with a 6-sheet reed, a reed (L₁) To 167 dtex 48 filament polyethylene terephthalate twisted yarn (twisting number of 100 times / m)₂, L_Three) To 334 decitex 96-filament polyethylene terephthalate twisted yarn (twisted 100 times / m) in an all-in arrangement to form a connecting yarn (L_Four) To supply 390 decitex polytrimethylene terephthalate monofilament yarns in an all-in arrangement, and to form a knitted fabric on the back side (L_Five, L₆) From 500 decitex 144 filament polyethylene terephthalate false twisted yarn (167 decitex 48 filament polyethylene terephthalate false twisted yarn, black pre-dyed yarn, 3 lines aligned) and fed in 13.5 course A three-dimensional knitted fabric with flat front and back, in which the connecting yarn partially forms a cross structure (× structure) with the following knitting structure at /2.54 cm. The obtained three-dimensional knitted fabric was heat-dried at 170 ° C. for 2 minutes to obtain a three-dimensional knitted fabric having the physical properties shown in Table 1.
(Knitting organization)
L₁: 2322/1011 /
L₂: 1011/2322 /
L_Three: 1000/0111 /
L_Four: 1043/6734 /
L_Five: 1110/0001 /
L₆: 2210/2234 /
[0037]
Comparative Example 1
Using a double raschel machine with a 14 gauge, 6mm hook between 6 hooks, two ridges (L₁, L₂) And two ridges (L_Five, L₆) Of 668 decitex / 192 filament polyethylene terephthalate twisted yarn (twisted number of turns 100 / m) obtained in Example 4 from two ridges (L_Three, L_Four) To 390 decitex polytrimethylene terephthalate monofilament yarn,₁, L_Three, L_Five1 in 1 out array for guide, L₂, L_Four, L₆A 1-out, 1-in array is supplied to the guide, and a 3D knitted fabric with front and back meshes, in which the connecting yarn partially forms a cross structure (× structure) in the knitting structure shown below at a driving 13.5 course / 2.54 cm. Organized. The obtained three-dimensional knitted fabric was widened at 170 ° C. × 2 minutes and heat-set by heat to obtain a three-dimensional knitted fabric having the physical properties shown in Table 1.
[0038]
(Knitting organization)

[0039]
Comparative Example 2
In Example 4, a three-dimensional knitted fabric having the physical properties shown in Table 1 was obtained in the same manner as in Example 1 except that the driving was performed at 10.2 course / inch.
[0040]
Comparative Example 3
Four 167 dtex 300 filament polyethylene terephthalate false twisted yarns (Z false twisted yarn, black dyed yarn) are twisted in the S direction at a twist rate of 100 turns / m, and 668 dtex / 1200 filament polyethylene terephthalate blend A twisted yarn (twisting number 100 times / m) was obtained.
In Example 4, two ridges (L₁, L₂), A solid knitted fabric having physical properties shown in Table 1 was obtained in the same manner as in Example 4 except that the 668 decitex / 576 filament polyethylene terephthalate synthetic twisted yarn (twisted number 100 times / m) was supplied.
[0041]
Comparative Example 4
Four 167 dtex 15 filament polyethylene terephthalate false twisted yarns (Z false twisted yarn, black dyed yarn) are combined and twisted in the S direction at a twist rate of 100 turns / m, and 668 dtex / 60 filament polyethylene terephthalate blend A twisted yarn (twisting number 100 times / m) was obtained.
In Example 4, two ridges (L₁, L₂) To supply the 668 decitex / 60 filament polyethylene terephthalate twisted yarn (twisted 100 times / m) to form a connecting yarn (L_Three, L_FourThe solid knitted fabric having the physical properties shown in Table 1 was obtained in the same manner as in Example 4 except that the 770 decitex polytrimethylene terephthalate monofilament manufactured in Reference Example was supplied.
[0042]
[Table 1]

[0043]
From Table 1, the three-dimensional knitted fabrics obtained in Examples 1 to 7 were excellent because the single yarn fineness of the front side knitted fabric was 1 to 10 dtex, the opening ratio was 35% or less, and the Taber abrasion was 2nd grade or more. It was confirmed that a seat having a surface texture and a cushion feeling and having little appearance change with respect to long-term use can be obtained.
On the other hand, in Comparative Example 1, since the aperture ratio was too high, the surface texture was inferior, and the appearance change with respect to long-term use was large. In Comparative Example 2, the stitch density was less than 4000, and in Comparative Example 3, the single yarn fineness of the front side knitted fabric was too small. Furthermore, in Comparative Example 4, since the single yarn fineness of the front side knitted fabric was too large, the surface texture and the cushion feeling were inferior.
[0044]
【The invention's effect】
The seat of the present invention has a three-dimensional knitted fabric having specific characteristics stretched on the frame, so that it has a soft surface texture and soft elasticity, has excellent wear resistance, and can be used for a long time. There is little change in appearance, and therefore it can be suitably used not only for seats used for furniture, office work, etc., but also for vehicles such as automobiles, railway vehicles, aircraft, child seats, strollers and wheelchairs.
[Brief description of the drawings]
FIG. 1 is a schematic view of a seat showing an embodiment of the present invention.
FIG. 2 is a diagram showing a load-displacement curve of a three-dimensional knitted fabric.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Seat, 2 ... Solid knit, 3 ... Pipe frame, 4 ... Holding member.

Claims (5)

A three-dimensional knitted fabric composed of two layers of front and back knitted fabrics and a connecting yarn that connects the two knitted fabrics is stretched on a frame to form a seat and / or a back portion, and the compression elasticity of the three-dimensional knitted fabric The surface knitted fabric is composed of a dense structure having a porosity of 0 to 35% , the surface knitted fabric being formed of multi-yarns having a single yarn fineness of 1 to 10 dtex, and the surface knitted fabric is densely stitched . A seat having a degree of 4000 to 11000 and a Taber abrasion of the front knitted fabric measured by the Taber rotor rear bracer method is 2 to 5 grade . The connecting yarn of the three-dimensional knitted fabric is a monofilament of 130 to 500 dtex, the front knitted fabric is a polyethylene terephthalate fiber multi-yarn having a thickness of 50 to 2000 dtex and a single yarn fineness of 1 to 10 dtex, and a warp knitting of 9 to 28 gauge The seat according to claim 1, wherein the seat is a three-dimensional knitted fabric knitted by a machine . The seat according to claim 1 or 2, wherein a surface stretch ratio of the front knitted fabric of the three-dimensional knitted fabric is 1 to 20%. The seat according to any one of claims 1 to 3, wherein the multi-yarn of the front side knitted fabric of the three-dimensional knitted fabric is a twisted yarn, an air mixed yarn or a fluid injection processed yarn. A vehicle comprising the seat according to any one of claims 1 to 4.

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