JP3704076B2 - Car seat fabric - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a novel tricot knitted fabric suitable for a car seat.
[0002]
[Prior art]
Car seats are used by being expanded and contracted according to the sheet, and since it is necessary to finish the entire appearance evenly in a stretched state, it has been conventionally limited to those made of pile fabrics, and flat fabrics There were no toned products.
[0003]
For example, Japanese Patent Laid-Open No. Hei 4-202836 discloses a warp knitted fabric in which pile yarn is knitted into a ground structure portion of a multifilament false twisted yarn as a highly stretchable pile fabric used as a surface covering material for a vehicle seat. Is disclosed. In addition, JP-A-3-51343 and JP-A-7-243154 disclose that a composite yarn in which polyesters having different dyeability are bonded is used as an interior pile fabric such as a vehicle. Japanese Patent Laid-Open No. 10-259543 and Japanese Patent Laid-Open No. 10-259543 disclose a moquette fabric that is a pile fabric.
[0004]
Furthermore, there are some that have stretch properties using specially processed yarns including urethane elastic yarns, but this has problems with heat resistance and is expensive, making it difficult to use as a car seat. It was.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a fabric for a car seat that is a tricot knitted fabric and has an appearance of a woven fabric.
[0006]
[Means for Solving the Problems]
In the present invention, in a tricot knitted fabric manufactured using three or more rivets, a side-by-side composite yarn in which components having different heat shrinkage properties are bonded to a back yarn is used, and 5-30 in both longitudinal and lateral directions. %, And the above problem was solved by obtaining a tricot knitted fabric having an elongation recovery rate of 90% or more. The elongation value in the present invention is based on the constant load elongation measurement method described later.
[0007]
Even when the tricot knitted fabric are not substantially raised, appearance in a uniform state of the fabric tone, moderate stretch characteristics moldability, has a wrinkle resistance, it is possible to very effectively used in Kersey DOO is there.
[0008]
Normally, the non-brushed state, unlike the case of brushed, less entanglement of the fibers, the density is low, difficult to obtain physical properties necessary for Carthy bets, but the back yarn, bonding a heat-shrinkable different components By using the side-by-side yarn, it becomes easy to obtain the required strength while maintaining the stretch set property while being in the woven form.
[0009]
The knitted fabric in the present invention preferably has a tear strength of 60 N or more, a wale of 35 to 39 / 2.54 cm, a course of 56 to 64 / 2.54 cm, and a knitted fabric density of 1500 to 2600 loops. /(2.54 cm) ² is preferable.
[0010]
In the present invention, by using a yarn having a side-by-side type composite yarn that becomes elastic due to three-dimensional crimp or the like as a back yarn as a composite yarn of the ground texture, it has moderate elasticity, For the middle yarn and front yarn, it is recommended to use normal yarn and finish it in a fabric-like appearance. By using a stretchable yarn for the back yarn, the sagging prevention and moldability of the final product will be improved, but in order to give light resistance to the middle yarn, it is necessary to use semi-dal yarn, full dull yarn, regular yarn, etc. preferable. Note that any yarn may be used as the front yarn, but it is preferable to use a semi-dal yarn or a processed yarn.
[0011]
In addition, it is preferable that both the middle yarn and the front yarn are thinner than the composite yarn, and the knitted fabric is a tricot knitted fabric manufactured with 4 sheets of cocoon. Since it can be obtained, there are advantages such as easy design and easy handling, which is preferable.
[0012]
Since the product of the present invention is made of a non-pile tricot knitted fabric manufactured with three or more folds, the design and texture are the same as those of the multi-woven fabric, and the sheet has an appropriate stretch characteristic. excellent wrinkle resistance during molding and assembly, and which can be stably used while maintaining beautiful appearance Carthy and.
[0013]
In the present invention , a side-by-side composite yarn in which components having different heat-shrink properties are bonded is used. By using this as an interlaced yarn, a high-quality tricot knitting can be performed without worrying about yarn breakage and fluffing. In this case, even with raw silk, uniform stretchability can be obtained.
[0014]
Next, in the present invention, a side-by-side composite yarn is used for the back yarn . As this composite yarn, for example, a polyester (a) having a small heat shrinkage characteristic and a polyester (b) having a large heat shrinkage characteristic are formed into a side-by-side type. A polyester having a filament yield of less than 10% (preferably 5% or less) is used as polyester (a), and a filament having a yield of 10% or more (preferably polyester (b)). Is preferably 15% or more).
[0015]
Furthermore, in order to develop sufficient crimpability, it is necessary to use polyester (a) and polyester (b) having a viscosity difference, the former having a higher viscosity than the latter, and the difference in viscosity. Is preferably about 0.20 to 0.40.
[0016]
Such a product of the present invention can be formed into a moderately stretchable fabric by imparting three-dimensional crimps to the composite yarn by heat treatment after knitting, and has a fabric-like appearance and is prevented by stretching. it combines the wrinkle properties and molding properties, and can be applied better quality Carthy and.
[0017]
In the present invention, the stretch rate of the tricot knitted fabric is limited to 5 to 30% in both the vertical and horizontal directions. If the stretch rate is less than 5%, the knitted fabric is adapted to the chair of the car. sex may hardly molded and it exceeds 30%, it is slack when the elongation returns, to produce wrinkles, because use in commercial value as a Kersey bets becomes difficult.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Examples of the present invention will be described below.
Example 1
Tricots were manufactured with 4 pieces of thread using the following thread.
〔back〕
A multifilament (110 dtex / 24f) comprising a composite fiber in which high-shrinkage polyethylene terephthalate (viscosity: 0.46) and low-shrinkage polyethylene terephthalate (viscosity: 0.69) are bonded side by side at a ratio of 1: 1. Tensile elongation of the multifilament (in accordance with JIS-L-1013, measured with AGS-1KNG autograph tensile tester manufactured by Shimadzu Corporation under the condition of a sample yarn length of 20 cm and a constant speed tensile rate of 20 cm / min. The strength and elongation at the time of elongation fracture were strength 2.63 cN / dT and elongation 28.1%.
〔Middle〕
A multifilament (84 dtex / 36f) made of fuller fiber of polyethylene terephthalate (titanium oxide content 1.4%).
〔front〕
Regular processed yarn (84 dtex / 36f), 2 sheets.
[0019]
The conditions for knitting, dyeing and finishing were as follows.
[Knitting]
Tricot wales: 28 / 2.54cm, Course: 54 / 2.54cm
Number of loops: 1512 pieces / (2.54 cm) ²
Knitted fabric size: Warp 58.7m, Width 211.5cm
〔staining〕
Normal dyeing wet heat temperature: 130 ° C, 45 minutes [finish]
Use final tenter (finished knitted fabric)
Wale: 37 / 2.54cm, Course: 60 / 2.54cm
Number of loops: 2220 / (2.54 cm) ²
Knitted fabric size: Warp 52.8m, Width 155cm
[0020]
The product thus obtained was a plain fabric-like fabric with no lines of warp or weft, and was excellent in light resistance.
The tear strength of this product is 191.1 N in length and 245.0 N in width, both greatly exceeding the standard value of 68.6 N for fabric for car seats, and the constant load elongation is 25 in both length and width. 0.0%, the set rate is 7.5% in length and 7.0% in width, satisfying the standard values (elongation rate 30% or less, set rate 8% or less). It became 92.5% and horizontal 93.0%.
[0021]
The tear strength was measured by the following method.
(1) Preparation of test pieces Five test pieces each having a width of 50 mm and a length of 250 mm are prepared from a total of two directions in the vertical and horizontal directions. Each test piece has a long side of 150 mm and a short side. An isosceles trapezoidal mark having a height of 100 mm and a height of the test side is attached, and a 10 mm cut is made in the center of the short side of the mark perpendicular to the side.
(2) Measurement of tear strength The test piece is attached to a constant-speed extension type tensile tester with a grip interval of 100 mm (however, the short side is stretched and the long side is loosened) and is torn at a pulling rate of 200 mm / min. , Measure the strength. In addition, tear strength is represented by an average value (N), and the minimum value among the five test pieces is shown as a test result.
[0022]
The constant load elongation rate and the set rate are values measured by the following methods.
(1) Preparation of test pieces Prepare test pieces each having a width of 80 mm and a length of 250 mm, 5 pieces each from a total of 2 directions in the vertical and horizontal directions, and 100 mm intervals at the center in the length direction. Mark the point.
(2) Measurement of constant load elongation rate The upper part of the test piece is fastened to the testing machine, and a weight with a total mass of 10 kg including the fasteners is attached to the lower part, and after standing for 10 minutes, the weight is suspended. Measure the gauge interval of the test piece.
Based on this measured value (L ₁ ), the constant load elongation rate is calculated by the following formula, and the maximum value of each of the five test pieces is shown as the test result.
. Constant load elongation = [(L ₁ −100) / 100] × 100
(3) Measurement of set rate After measuring the constant load elongation rate, the test piece removed from the fastener is left on the horizontal table for 10 minutes, and then the gauge interval is measured as it is.
Based on this measured value (L ₂ ), the set rate is calculated by the following formula, and the maximum value of each of the five test pieces is shown as the test result.
. Set rate = [(L ₂ −100) / 100] × 100
The elongation recovery rate (%) is (100-set rate).
[0023]
Example 2
A tricot was manufactured in four pieces with the same yarn usage as in Example 1 except that a flat yarn of 84 dtex / 12f was used at the front. A product having an appearance with excellent gloss and excellent physical properties similar to the product of Example 1 was obtained.
[0024]
Example 3
Using the same thread as in Example 1, a vertical stripe type tricot was manufactured with a three-piece kite with one front.
[0025]
The tricot knitted fabrics obtained in Examples 1 to 3 have a brushed fabric-like appearance, and can be stretched by 5 to 30% in both the longitudinal and lateral directions, and have a recovery rate of elongation. It was 90% or more.
[0026]
【The invention's effect】
The product of the present invention can be used with good moldability because it has a fabric-like appearance and an appropriate stretchability. Moreover, although it can be manufactured at a relatively low cost, it also has an appropriate volume feeling and has physical properties required for a car seat such as light resistance and strength.

Claims (6)

A tricot knitted fabric manufactured using 3 or more rivets, using a side-by-side composite yarn in which components having different heat shrinkability are bonded to the back yarn, and 5 in both the longitudinal and lateral directions. A fabric for a car seat, which can be extended by -30% and has a recovery rate of elongation of 90% or more.   The fabric according to claim 1, wherein the tricot knitted fabric is substantially not brushed, and has a wale of 35 to 39 / 2.54 cm and a course of 56 to 64 / 2.54 cm.  The fabric according to claim 1 or 2, wherein the composite yarn has a three-dimensional crimp.  The fabric according to any one of claims 1 to 3, wherein the middle yarn has light resistance.  The fabric according to any one of claims 1 to 4, wherein the middle yarn and the front yarn are both thinner than the composite yarn.  The fabric according to any one of claims 1 to 5, wherein the knitted fabric is a tricot knitted fabric made of four sheets.