JP2009174085A - Interior fabric for ceiling of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an interior fabric for the ceiling of an automobile, having light weight and high air permeability, free from oppressive feeling, keeping excellent soft-touch feeling and cushioning property even after bonding, free from generation of stretch crease in the bonding operation to enable neat bonding, and having a base design on the surface to give excellent design effect. <P>SOLUTION: The interior fabric for the ceiling of an automobile having a fabric weight of 200-450 g/m<SP>2</SP>, a total thickness of 2-4 mm and an air permeability of 10-120 cc/cm<SP>2</SP>×sec is knitted as a double warp knitted fabric obtained by connecting a front warp knitted fabric and a back warp knitted fabric with a linking yarn. The back warp knitted fabric has a non-mesh knitted texture. The back warp knitted fabric constituting the back face is knitted with several kinds of knitting yarns passed through two or more reeds. The knitting yarn passed through at least one reed among the multiple reeds is composed of crimped fibers and the knitting yarn passed through at least one reed is composed of uncrimped fibers. The double warp knitted fabric has longitudinal and lateral elongations of 10-100% each and elongation recovery rates after longitudinal and lateral elongation of ≤15% each. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an interior fabric that is bonded to a vehicle ceiling base material.

As for the vehicle ceiling interior fabric, it is required to reduce the weight because it is for vehicles that require fuel economy savings, and also to reduce the weight in order to prevent drooping due to its own weight when bonding to the ceiling base material. The basis weight is generally 450 g / m ²
It is as follows (for example, refer to Patent Document 1).

The vehicle ceiling interior fabric is required to have sound absorption because it is an interior material in a narrow vehicle where noise such as an engine is trapped, and the air permeability is set to 5 to 150 cc / cm ² · sec (for example, Patent Document 1).

  A vehicle ceiling interior fabric is required to have soft touch and cushioning because it is easy to touch and is used for a low ceiling in the vehicle that is close to the eyes. In order to relieve the feeling of pressure, the thickness is generally set to 1 to 8 mm (see, for example, Patent Document 1).

  The vehicle ceiling interior fabric may be finished by raising the back surface, which is an adhesive surface, in order to enhance the adhesion to the ceiling base material (see, for example, Patent Document 1).

Conventional vehicle ceiling interior materials are foam sheets (mainly polyurethane) in order to satisfy the above required quality characteristics, that is, quality characteristics such as light weight, sound absorption (breathability), soft touch, cushioning, thickness, and bondability. The interior fabric is adhered and laminated on the surface of the foam sheet), and the back fabric is adhered and laminated on the back surface of the foam sheet as necessary.
However, to make it easier to separate and recover the ceiling material waste generated from scrap cars, it is made of polyester fiber or other single fiber material without using foam sheets (polyurethane foam sheets), and raised on the back It is desired that the treated tricot knitted fabric is used as a vehicle ceiling interior fabric as it is (see, for example, Patent Document 1).

JP 2005-68777 A

In the vehicle ceiling interior fabric composed of a tricot knitted fabric with the back surface raised as described in Patent Document 1, the back surface is a sinker loop surface of a 3-12 needle swinging structure that is easily brushed (see Patent Document 1, paragraph [0018]). ) Since the surface becomes a needle loop surface with uniform stitches, it is difficult to obtain a vehicle ceiling interior fabric excellent in design.
In the tricot knitted fabric, fiber turbulence occurs on the needle loop surface (front surface) due to the raised treatment on the sinker loop surface (back surface), and shearing treatment on the raised surface is unavoidable (Patent Document 1, Paragraph [ 0020]).

In a vehicle ceiling interior fabric formed by raising the back side of a tricot knitted fabric, when an adhesive for bonding is applied to the raised back side, the raised fluff forms a coating film integrated with the adhesive. It will be.
Therefore, even if the soft touch and volume feeling of the vehicle ceiling interior fabric immediately after cutting into a shape corresponding to the ceiling base material, that is, the vehicle ceiling interior fabric before bonding is highly evaluated, the adhesive is applied on the back surface. In the vehicle ceiling interior fabric after construction, the raised fluff on the back surface becomes a coating film integrated with the adhesive. Will not be enhanced.

Therefore, the present invention is lightweight, rich in breathability, does not give a feeling of pressure, retains an excellent soft touch texture and cushioning even after bonding work, and cleanly adheres without causing expansion and contraction during bonding work An object of the present invention is to obtain a vehicular ceiling interior fabric that has an uneven pattern, has a three-dimensional surface, and is excellent in design.
Another object of the present invention is to prevent the surface fiber from being disturbed by the raising treatment even if the raising treatment is applied to the back surface, and thus to eliminate the shearing treatment after the raising treatment.

The vehicle ceiling interior fabric according to the present invention is directly bonded to a vehicle ceiling base material, and (a) the fabric weight of the entire fabric is 200 to 450 g / m ² as in the conventional product.
(B) in a knitted fabric having a total fabric thickness of 2 to 4 mm, and (c) an air permeability of the entire fabric of 10 to 120 cc / cm ² · sec. (D) surface warp knitted fabric and back warp (E) the outer surface of the back warp knitted fabric is constituted by a needle loop made of a non-mesh knitted structure, and (f) the back warp knitted fabric constituting the back surface is at least 2 sheets A plurality of types of knitting yarns passed through a plurality of folds, and a knitting yarn passed through at least one of the folds is formed of crimped fibers; The degree is 120cc / cm ² less than the air permeability of the surface warp knitted fabric
-It is the 1st characteristic that it is below sec.

  The second feature of the vehicle ceiling interior fabric according to the present invention is that, in addition to the first feature, (h) at least one knitting yarn among several types of knitting yarns of the back warp knitted fabric is made of non-crimped fibers. It is comprised and the raising process is made | formed on the outer surface of the back warp knitted fabric which is the back surface of a vehicle ceiling interior fabric.

  The third feature of the vehicle ceiling interior fabric according to the present invention is that, in addition to any of the first and second features, (i) the vertical / horizontal elongation is 10% to 100%, respectively (j ) The rate of growth recovery after vertical and horizontal elongation is 15% or less, respectively.

  According to a fourth feature of the vehicle ceiling interior fabric according to the present invention, in addition to any of the first, second, and third features, (k) the air permeability of the back warp knitted fabric is the air permeability of the surface warp knitted fabric. 70% or less, (l) 50% or more of the other elongation rate, whichever is smaller, either the vertical growth rate or the horizontal elongation rate, and (m) the recovery of the elongation after the vertical elongation One of the rate of recovery and the rate of elongation recovery after elongation of the width is small.

  According to a fifth feature of the vehicle ceiling interior fabric according to the present invention, in addition to any of the first, second, third, and fourth features, (n) a knitting yarn of a surface warp knitted fabric and a back warp knitted fabric The single fiber fineness is 6 dtex or less, and the total fineness of the connecting yarns constituting the void layer by connecting the surface warp knitted fabric and the back warp knitted fabric is passed through a plurality of wrinkles of two or more wrinkles. It is at a point thinner than the total fineness of the knitting yarn passed through at least any one of the several types of knitting yarns constituting the warp knitted fabric.

  A sixth feature of the vehicle ceiling interior fabric according to the present invention is that in addition to any of the first, second, third, fourth, and fifth features, (o) two or more warp knitted fabrics The knitting yarns A and B passed through at least two of the plurality of cocoons are swung in the course direction in opposite directions and knitted. It is in the point.

  According to a seventh feature of the vehicle ceiling interior fabric according to the present invention, in addition to any of the first, second, third, fourth, fifth, and sixth features, (p) 3 warp knitted fabrics are provided. (Q) The knitting yarn passed through at least one of the plurality of folds is composed of crimped fibers. It is in.

According to the present invention (first feature), (a) the vehicle ceiling interior fabric is a double warp knitted fabric that is knitted by connecting a surface warp knitted fabric and a back warp knitted fabric with connecting yarns. Even if the adhesive penetrates into the back warp knitted fabric, it does not ooze out into the surface warp knitted fabric, and the surface warp knitted fabric is not affected by the adhesive for adhesive construction and maintains the soft touch feel and texture of the fabric. (B) Since the void layer formed by the connecting yarn is interposed between the surface warp knitted fabric and the back warp knitted fabric, the cushioning property of the surface of the vehicle ceiling interior fabric is good and the soft touch is achieved. Since the knitted fabric is composed of a non-mesh knitted structure, and the total thickness of the entire fabric is 2 mm or more, even if the adhesive for adhesive construction soaks into the back warp knitted fabric, it is concealed by the surface warp knitted fabric and exposed on the surface There is nothing.
And (d) the back warp knitted fabric constituting the back surface is constituted by several types of knitting yarns passed through a plurality of two or more rivets, and passes through at least one of the plural types of knitting yarns. Since the knitted yarn is composed of crimped fibers, the back warp knitted fabric becomes bulky, the adhesive for bonding construction is absorbed by the back warp knitted fabric, and the seepage to the surface of the vehicle ceiling interior fabric is suppressed. It is done.
Further, (f) Adhesive for adhesive construction hardly oozes out from the back warp knitted fabric in that the air permeability of the back warp knitted fabric is less than the air permeability of the surface warp knitted fabric and is 120 cc / cm ² · sec or less. If the air permeability of the warp knitted fabric is higher than the air permeability of the back warp knitted fabric, it is easy to make the vehicle ceiling interior fabric soft-touch, and the sound absorption of the vehicle ceiling interior fabric increases.

According to the present invention (second feature), (g) When performing a raising treatment on the outer surface of the back warp knitted fabric, penetration of the adhesive for adhesive construction into the back warp knitted fabric is suppressed by the raised fluff, The vehicle ceiling interior fabric can be bonded without damaging the texture.
And (h) since there is a void layer separated via a connecting yarn between the surface warp knitted fabric and the back warp knitted fabric, the sinker loop Sa of the surface warp knitted fabric is obtained by raising the outer surface of the back warp knitted fabric. -The fibers of Sb / Sc and needle loop N are not disturbed, and the post-shearing treatment after the raising treatment on the outer surface of the back warp knitted fabric becomes unnecessary.
In addition, (ri) The crimped fiber that is bulky and easily raised on the back warp knitted fabric is easy to be raised. On the other hand, the back warp knitted fabric is low in volume and is not easily caught on the raised warp. Since fibers are used, there is no abnormal fluffing, and problems such as breaking the warp knitted fabric due to excessive raising are avoided.

  According to the present invention (third feature), (N) vertical and horizontal elongation rates are 10% to 100%, respectively, so that it is easy to follow the undulations of the ceiling base material, and after the adhesive construction, , (Le) Since the vertical and horizontal elongation recovery rate is 15% or less, the vehicle ceiling interior fabric can be used as a ceiling base material without being warped or peeled off due to the contraction stress generated during the bonding process. It can be glued and constructed neatly.

According to the present invention (fourth feature), (v) the air permeability of the back warp knitted fabric is 70% or less of the air permeability of the surface warp knitted fabric, and the knitted fabric combining the back warp knitted fabric and the surface warp knitted fabric Overall air permeability is 120cc / cm ²
-Since it is sec or less, the adhesive for adhesive construction hardly bleeds into the back warp knitted fabric.
Also, (i) the elongation rate of the vertical and the horizontal elongation rate, whichever is smaller, the elongation rate of one of them is 50% or more of the other elongation rate, the elongation recovery rate after the vertical elongation and the elongation after the horizontal elongation Since the elongation recovery rate of one of the smaller recovery rates is 30% or more of the other elongation recovery rate, it can be stretched evenly in the vertical and horizontal directions and can be adhered and cleaned.

  According to the present invention (fifth feature), (f) the single fiber fineness of the knitting yarn of the surface warp knitted fabric and the back warp knitted fabric is 6 dtex or less, and the surface warp knitted fabric and the back warp knitted fabric are connected. If the total fineness of the connecting yarns constituting the void layer is made thinner than the total fineness of the knitting yarns constituting the back warp knitted fabric, the total fineness of the connected yarns can be increased even if the outer surface of the back warp knitted fabric is subjected to raising treatment. The needle loop of the thin connecting yarn is hidden under the needle loop of the knitting yarn with a large total fineness, and the fibers of the needle loop of the connecting yarn are not scratched to the raised needle (needle cloth), and the surface warp knitted fabric is passed through the connecting yarn. Is not pulled into the back warp knitted fabric side (gap layer) by the raised needles (needle cloth), the fibers are not disturbed in the surface warp knitted fabric, and the connecting yarn is also connected to the warp knitted fabric and the back warp. Since the air gap layer between the knitted fabrics keeps an upright state, the surface of the vehicle ceiling interior fabric has a clean surface with the needle loops of the surface knitted fabric aligned. It is obtained.

  According to the present invention (sixth feature), (iv) the surface warp knitted fabric is constituted by knitting yarns A and B that are passed through a plurality of reeds of two or more reeds, and at least two of the plurality of reeds The knitting yarns A and B passed through the reeds are knitted while being swung in opposite directions in the course direction, and a honeycomb pattern is formed by crossing the sinker loops Sa and Sb of the knitting yarns A and B. , Since there is a gap layer separated by a connecting yarn between the front warp knitted fabric and the back warp knitted fabric, the sinker loops Sa and Sb of the knitting yarns A and B sink into the gap layer, The needle loop N of the surface warp knitted fabric is raised, a remarkable uneven step is generated between the needle loop N and the sinker loops Sa and Sb, the honeycomb pattern on the surface has a three-dimensional effect, and the vehicle ceiling interior fabric is It will look good.

  According to the present invention (seventh feature), (i) the surface warp knitted fabric is constituted by a plurality of types of knitting yarns passed through a plurality of ridges of three or more ridges, and at least of the plurality of types of knitting yarns Since the knitting yarn passed through one sheet of wrinkle is composed of crimped fibers, the surface warp knitted fabric becomes bulky and the surface warp knitted fabric even if the adhesive for adhesive construction oozes out into the back warp knitted fabric. And (v) the surface warp knitted fabric is composed of knitting yarns A, B, and C that are passed through a plurality of ridges of 3 sheets or more. A honeycomb ground pattern in which the sinker loops A, B, and C of A, B, and C cross between the adjacent needle loops N and N becomes clear.

The vehicle ceiling interior fabric according to the present invention is knitted using a double raschel warp knitting machine, and its wale density is finer than 20 wale / 25.4 mm, generally 25 ± 5 wale / 25.4 mm, and the course density is 40. Finer than the course / 25.4 mm, generally 50 ± 5 course / 25.4 mm.
The air permeability of the back warp knitted fabric may be 60% or less of the air permeability of the surface warp knitted fabric, and preferably the air permeability of the entire knitted fabric including the back warp knitted fabric and the surface warp knitted fabric is 60 cc / cm ^2.
・ Set it to sec or less.

Polyester fibers such as polyethylene terephthalate and polytrimethylene terephthalate are preferably used for the knitting yarn and the connecting yarn of the surface warp knitted fabric and the back warp knitted fabric.
The single fiber fineness of the knitting yarn of the surface warp knitted fabric and the back warp knitted fabric is 6 dtex or less, preferably 4 dtex or less.

In the connecting yarn that forms the void layer by connecting the surface warp knitted fabric and the back warp knitted fabric, the total fineness is narrower than the total fineness of any of several types of knitting yarns constituting the back warp knitted fabric, Generally, fiber yarns having a total fineness of 20 to 60 dtex, preferably filament yarns having a single fiber fineness larger than the single fiber fineness of any of several types of knitting yarns constituting the back warp knitted fabric, preferably monofilament yarns are used. It is recommended.
Because, as described above, if the total fineness of the connecting yarn is smaller than the total fineness of the knitting yarn of the back warp knitted fabric, the needle loop of the connecting yarn is hidden under the needle loop of the knitting yarn having a large total fineness, When raising the back warp knitted fabric, the connecting yarn is not scraped, and if the connecting yarn is a non-crimped fiber, the raising needle is difficult to catch, and if the connecting yarn is a monofilament yarn, the raising needle is more difficult to catch. is there.
Unlike the cushions and rugs that are used on the limbs, the vehicle ceiling interior fabric is used on the vehicle ceiling that never places the limbs, and does not require strong cushioning to the left. Since soft touch with good touch is strongly required, even if the total fineness of the connecting yarn is made smaller than the total fineness of the surface warp knitted fabric or the back warp knitted fabric, there is no particular problem. .
When the total fineness is 60 dtex or less, there is little elastic force acting on the surface of the warp knitted fabric from the connected yarn in an upright state in the void layer between the warp knitted fabric and the back warp knitted fabric. The surface becomes soft touch.
In consideration of these points, in order to improve the design of the vehicle ceiling interior fabric and to increase the sound absorption by the void layer, the connecting yarn has an uncrimped fiber yarn (filament yarn) having a total fineness of 20 to 60 dtex, preferably It is desirable to use a monofilament yarn having a single fiber fineness of 20 to 40 dtex.

To the basis weight of the vehicle ceiling interior fabric and 200~450g / m ^2, as conventional products bonded to polyurethane foam sheet or non-woven fabric backing to tricot warp knitted fabric is the case, it is 450g / m ²
This is because the vehicle ceiling interior fabric is liable to sag during adhesion construction and the adhesion construction becomes difficult, and if it is less than 200 g / m ² , it is difficult to ensure the concealability of the ceiling material by the vehicle ceiling interior fabric. Because.

The reason why the thickness of the vehicle ceiling interior fabric is 2 to 4 mm is that when the thickness exceeds 4 mm, the basis weight is 450 g / m ² or less, so that the bulk specific gravity of the vehicle ceiling interior fabric is too small. This is because the surface warp knitted fabric is greatly dented only by touching, giving a poor impression as an interior material, and a feeling of pressure can be felt on the ceiling of the vehicle.
On the contrary, when the thickness is less than 2 mm, there are few void layers between the surface warp knitted fabric and the back warp knitted fabric, and the vehicle ceiling interior fabric has a two-layer structure of the surface warp knitted fabric and the back warp knitted fabric. Meaning disappears.
The surface (surface warp knitted fabric) of the vehicle ceiling interior fabric is appropriately subjected to antifouling treatment with a fluorine resin-based or silicone resin-based water / oil repellent.
The back surface (raised layer) of the vehicle ceiling interior fabric is appropriately subjected to deodorization processing using activated carbon or an inorganic deodorant.

[Air permeability measurement method]
The air permeability of the vehicle ceiling interior fabric in the present invention is measured by the JIS-L-1018 (8.33.1) method.

[Elongation measurement method]
The elongation percentage of the vehicle ceiling interior fabric in the present invention is measured and calculated by the following procedure.
(1) Measured from the warp knitted fabric in the horizontal direction (course direction) X of 300 mm and in the vertical direction (Wale direction) Y in size of 80 mm, and in the horizontal direction X, the test piece for measuring the elongation rate in the horizontal direction X of 80 mm in the vertical direction Five test pieces for measuring the longitudinal elongation rate with a Y dimension of 300 mm are collected.
(2) A mark is entered at a distance of 50 mm from the center point in the length direction of each longitudinally long test piece.
(3) A jig with a grip width of 80 mm is attached to both ends in the longitudinal direction of each longitudinally long test piece, each test piece is hung vertically with a load of 10 kgf including the weight of the jig, and 10 minutes have passed. Measure the distance between the top and bottom marks.
(4) The distance between the upper and lower gauge points before suspending the difference between the distance (unit: mm) between the upper and lower gauge points after 10 minutes and the distance between the upper and lower gauge points (100 mm) before hanging. By multiplying the value divided by (100 mm) by 100, the elongation in the vertical direction Y and the elongation in the horizontal direction X are calculated.
(5) With the average value of the elongation calculation values of the three specimens excluding the maximum and minimum values of the elongation calculation values for each of the five sheets for the horizontal direction elongation measurement and for the vertical direction elongation measurement. The elongation in the horizontal direction and the elongation in the vertical direction.

[Method for measuring elongation recovery rate]
The elongation recovery rate of the vehicle ceiling interior fabric in the present invention is measured and calculated by the following procedure.
(1) From the warp knitted fabric, a test piece for measuring a horizontal elongation recovery rate having a size of 300 mm in the horizontal direction X and a size of 80 mm in the vertical direction Y, and a size of 80 mm in the horizontal direction X and a size of 300 mm in the vertical direction Y Five test pieces for measuring the longitudinal elongation recovery rate are collected.
(2) A mark is entered at a distance of 50 mm from the center point in the length direction of each longitudinally long test piece.
(3) A jig with a grip width of 80 mm is attached to both ends in the longitudinal direction of each longitudinally long test piece, each test piece is hung vertically by applying a load of 10 kgf including the weight of the jig, and when 10 minutes have elapsed. Deweigh and leave on a horizontal table to measure the distance between the upper and lower gauge points after 10 minutes.
(4) The difference between the distance between the upper and lower gauge points (unit: mm) and the distance between the upper and lower gauge points (100 mm) before hanging after the 10-minute period of standing on the table, By multiplying the value divided by the distance between the gauge points (100 mm) by 100, the elongation recovery rate in the vertical direction Y and the elongation recovery rate in the horizontal direction X are calculated.
(5) Calculation of elongation recovery rate of 3 test pieces excluding maximum and minimum values of 5 elongation recovery rate calculation values for horizontal direction elongation recovery rate measurement and vertical direction elongation recovery rate measurement The average value of the values is defined as the horizontal direction elongation recovery rate and the vertical direction elongation recovery rate.
The air permeability, elongation rate, and elongation recovery rate of the front warp knitted fabric and the back warp knitted fabric of the double warp knitted fabric (vehicle ceiling interior fabric) are determined by the connecting yarn connecting the front warp knitted fabric and the back warp knitted fabric. Cut and measure the double warp knitted fabric separated into a front warp knitted fabric and a back warp knitted fabric.

Example 1
Six guide bars _{L 1, L 2, L 3} , L 4, L 5, L 6
The double raschel warp knitting machine having a 1 reed L ₁ and the second reed L ₂ polyester crimped fiber multifilament yarn A · B · C of the third to the reed L ₃ single fiber fineness 2.4 dtex · total fineness 84dtex Is the knitting yarn for the surface warp knitted fabric and the first heel L ₁
And the second rod L ₂ are passed by one-in-one-out (1in, 1out) of one rod needle, and the third rod L ₃ is passed through all the rod needles, and the fourth rod L ₄
A polyester non-crimped monofilament yarn having a single fiber fineness of 22 dtex and a total fineness of 22 dtex is passed as a connecting yarn through all the wrinkle needles of No. 5 and a single fiber fineness of 2.4 dtex and a total fineness of 56 dtex is passed through all the wrinkle needles of the _fifth heel L5. Polyester uncrimped multifilament yarn, 6th L ₆
Through all of the reed needle in single fiber fineness 2.4dtex · of the total fineness 84dtex polyester crimped fiber multifilament yarns as Urakei knitted fabric knitting yarn each of the first reed L ₁
The manipulated in the order of knitting patterns / 1-0 / 1-1 / 1-2 / 2-2 / 2-3 / 2-2 / 2-1 / 1-1 / ........., the second reed L ₂ knitting patterns / 2-3 / 2-2 / 2-1 / 1-1 / 1-0 / 1-1 / 1-2 / 2-2 / ......... operated in this order, the third reed L ₃
Are operated in the order of the knitting pattern / 3-2 / 1-1 / 0-1 / 2-2 /..., And the fourth rod L ₄ is operated in the knitting pattern / 2-1-1-1-0 / 0-1 / 1. -2 / ......... operated in this order, the fifth reed L ₅
The manipulated in the order of knitting patterns / 1-1 / 2-1 / 1-1 / 0-1 / ........., a sixth reed L ₆ knitting pattern / 1-1 / 0-1 / 2-2 / 3 -// ... in order, the surface warp knitted fabric and the back warp knitted fabric become a non-mesh knitted structure, the wale density is 25 W / 25.4 mm, the course density is 53 C / 25.4 mm, and the basis weight is 279 g / m ^2.
Then, a double raschel double warp knitted fabric having a total thickness of 3.4 mm is knitted to form a vehicle ceiling interior fabric.

The vehicle ceiling interior fabric has an air permeability of 110 cc / cm ² · sec, the surface warp knitted fabric has an air permeability of 230 cc / cm ² · sec, and the back warp knitted fabric has an air permeability of 112 cc / cm ^2.
・ It was sec.
The vehicle ceiling interior fabric has a vertical elongation rate of 25%, a horizontal elongation rate of 26%, and a vertical elongation rate of 96.1% of the horizontal elongation rate. The vertical elongation was 47%, the horizontal elongation was 38%, the warp knitted fabric vertical elongation was 47%, and the horizontal elongation was 47%.
This vehicle ceiling interior fabric has an elongation recovery rate of 3% after the vertical extension, and a horizontal recovery rate of 5% after the horizontal extension, and the recovery rate after the vertical extension is the recovery of the elongation after the horizontal extension. 60% of the rate, the recovery rate of the warp knitted fabric of the vehicle ceiling interior fabric after the warp elongation is 7%, the stretch recovery rate after the stretch of 8% is 8%, The elongation recovery rate after the vertical elongation was 12%, and the elongation recovery rate after the horizontal elongation was 15%.

(Example 2)
Six guide bars _{L 1, L 2, L 3} , L 4, L 5, L 6
A double raschel warp knitting machine having a first lash L ₁ and a second heel L ₂ , polyester uncrimped multifilament yarns A and B having a single fiber fineness of 2.4 dtex and a total fineness of 84 dtex are knitted for surface warp knitted fabric As a thread, pass one needle in one-in-one-out (1in, 1out), and the 3rd needle L ₃
A polyester crimped fiber multifilament yarn having a single fiber fineness of 2.4 dtex and a total fineness of 84 dtex is passed as a knitting yarn C for surface warp knitted fabric through all the heel needles, and the fourth heel L ₄
Polyester uncrimped monofilament yarn having a single fiber fineness of 22 dtex / total fineness of 22 dtex is passed as a connecting yarn through all the wrinkle needles of No. 5 and a single fiber fineness of 2.4 dtex / total fineness of 84 dtex is passed through all the wrinkle needles of the _fifth heel L5. along with the passage of polyester non-crimped fiber multi-filament yarn as Urakei knitted fabric knitting yarn, sixth reed L ₆
Through all of the reed needle polyester crimped fiber multi-filament yarn of a single fiber fineness 3.5dtex · total fineness 167dtex as Urakei knitted fabric knitting yarn, the first reed L ₁
The manipulated in the order of knitting patterns / 1-0 / 1-1 / 1-2 / 2-2 / 2-3 / 2-2 / 2-1 / 1-1 / ........., the second reed L ₂ knitting patterns / 2-3 / 2-2 / 2-1 / 1-1 / 1-0 / 1-1 / 1-2 / 2-2 / ......... operated in this order, the third reed L ₃
Are operated in the order of the knitting pattern / 3-2 / 1-1 / 0-1 / 2-2 /..., And the fourth rod L ₄ is operated in the knitting pattern / 2-1-1-1-0 / 0-1 / 1. -2 / ......... operated in this order, the fifth reed L ₅
Are operated in the order of the knitting pattern / 1-1 / 2-1 / 1-1 / 0-1 /..., And the sixth rod L ₆ is knitted pattern / 1-1 / 0-1 / 2-2 / 3. -// ... in order, the surface warp knitted fabric and the back warp knitted fabric become a non-mesh knitted structure, the wale density is 25 W / 25.4 mm, the course density is 50 C / 25.4 mm, and the basis weight is 410 g / m ^2.
Then, a double raschel double warp knitted fabric having a total thickness of 3.7 mm is knitted to form a vehicle ceiling interior fabric.

The air permeability of the ceiling of the vehicle interior fabric 48cc / cm ² · sec, air permeability of the table warp knitted fabric is 222cc / cm ² · sec, Urakei knitted fabric of the air permeability is 48cc / cm ²
・ It was sec.
The vertical elongation rate of this vehicle ceiling interior fabric is 12%, the horizontal elongation rate is 18%, and the vertical elongation rate is 66.7% of the horizontal elongation rate. The vertical elongation was 45%, the horizontal elongation was 26%, the warp knitted fabric vertical elongation was 40%, and the horizontal elongation was 38%.
This vehicle ceiling interior fabric has an elongation recovery rate of 3% after the vertical extension, and a horizontal recovery rate of 5% after the horizontal extension, and the recovery rate after the vertical extension is the recovery of the elongation after the horizontal extension. Of the warp knitted fabric of the warp knitted fabric after the warp elongation is 10%, the stretch recovery rate of the warp knitted fabric after stretching is 7%, The elongation recovery rate was 7%, and the elongation recovery rate after the horizontal elongation was 9%.

(Comparative Example 1)
Five reed _{L 1, L 2, L 4} , L 5, first guide bar double raschel warp knitting machine having a L ₆ L ₁
And in the second reed L ₂ as a single fiber fineness 2.3dtex of skipping a single reed needle the polyester non-crimped fiber multi-filament yarn of a total fineness 110dtex as Omotekei knitted fabric knitting yarn Tsuin-two outs (2in · 2out) Through, 4th L ₄
All the reed needle polyester non crimped fibers monofilament yarns of a single fiber fineness 33 dtex · total fineness 33 dtex through a connecting yarn, the fifth reed L ₅ 6 reed L ₆
A polyester uncrimped multifilament yarn having a single fiber fineness of 3.1 dtex and a total fineness of 110 dtex is passed as a knitting yarn for the back warp knitted fabric through all the cocoon needles of the first heel L ₁
Knitting pattern / 4-5 / 4-4 / 3-2 / 3-3-3 / 4-5 / 4-4 / 3-2 / 3-3-3 / 4-5 / 4-4 / 3-2 / 2- 2 / 1-0 / 1-1 / 2-3 / 2-2 / 1-0 / 1-1 / 2-3 / 2-2 / 1-0 / 1-1 / 2-3 / 3-3 / ......... the operation in the order of, the second reed L ₂
Knitting pattern / 1-0 / 1-1 / 2-3 / 2-2 / 1-0 / 1-1 / 2-3 / 2-2 / 1-0 / 1-1 / 2-3 / 3 3 / 4-5 / 4-4 / 3-2 / 3-3-3 / 4-5 / 4-4 / 3-2 / 3-3-3 / 4-5 / 4-4 / 3-3-2-2 / Operate in the order of ……… 4th L ₄
Are operated in the order of the knitting pattern / 0-1 / 1-2 / 2-1 / 1-0 /..., And the fifth rod L ₅ is operated in the knitting pattern / 0-0 / 0-1 / 1-1 / 1. -0 / ......... operate in the order of, sixth reed L ₆
Are operated in the order of the knitting pattern / 0-0 / 4-4 / 4-4 / 0-0 /..., And the surface warp knitted fabric becomes a mesh knitted fabric and the back warp knitted fabric becomes a non-mesh knitted fabric. Density 25W / 25.4mm, course density 46C / 25.4mm, basis weight 298g / m ²
Then, a double raschel double warp knitted fabric having a total thickness of 2.4 mm is knitted to form a vehicle ceiling interior fabric.

The air permeability of the vehicle ceiling interior fabric is 440 cc / cm ² · sec or more, and the air permeability of the surface warp knitted fabric and the back warp knitted fabric is also 440 cc / cm ^2.
・ It was more than sec.
The vehicle ceiling interior fabric has a vertical and horizontal elongation rate of 9%, the vertical elongation rate is 100% of the horizontal elongation rate, and the warp knitting fabric vertical elongation rate is 30%. The horizontal elongation was 55%, the warp knitted fabric vertical elongation was 11%, and the horizontal elongation was 8%.
This vehicle ceiling interior fabric has an elongation recovery rate of 1% after the vertical extension, and a horizontal recovery rate of 2% after the horizontal extension. The recovery rate after the vertical extension is the recovery of the elongation after the horizontal extension. Of the warp knitted fabric of the warp knitted fabric after the warp elongation is 5%, the stretch recovery rate of the warp knitted fabric after stretching is 12%, The elongation recovery rate and the elongation recovery rate after the horizontal elongation were both 4%.

(Comparative Example 2)
Five reed _{L 1, L 2, L 4} , L 5, first guide bar double raschel warp knitting machine having a L ₆ L ₁
Three-in-one-out for every three heel needles using polyester crimped multifilament yarn with a single fiber fineness of 2.4 dtex and a total fineness of 84 dtex for the _second heel L ₂ 3in, 1out), 4th 筬 L ₄
All the reed needle polyester non crimped fibers monofilament yarns of a single fiber fineness 33 dtex · total fineness 33 dtex through a connecting yarn, the fifth reed L ₅ 6 reed L ₆
Through all of the reed needle in single fiber fineness 2.4dtex · of the total fineness 84dtex polyester crimped fiber multifilament yarns as Urakei knitted fabric knitting yarn each of the first reed L ₁
The manipulated in the order of knitting patterns / 2-1 / 1-1 / 1-0 / 1-1 / 2-3 / 3-3 / 3-4 / 3-3 / ........., the second reed L ₂ knitting patterns / 2-3 / 3-3 / 3-4 / 3-3 / 2-1 / 1-1 / 1-0 / 1-1 / ......... order to operate the fourth reed L ₄
The knitting pattern / 2-1 / 1-0 / 0-1 / 1-2 / ......... operated in this order, the fifth reed L ₅ knitting pattern / 1-1 / 2-1 / 1-1 / 0 -1 / ......... operate in the order of, sixth reed L ₆
Are operated in the order of the knitting pattern / 1-1 / 0-1 / 1-1 / 2-1 /..., The surface warp knitted fabric becomes the mesh knitted fabric and the back warp knitted fabric becomes the non-mesh knitted fabric, and the wale Density 25W / 25.4mm, course density 40C / 25.4mm, basis weight 255g / m ²
Then, a double raschel double warp knitted fabric having a total thickness of 3.1 mm is knitted to form a vehicle ceiling interior fabric.

The air permeability of the vehicle ceiling interior fabric 244cc / cm ² · sec, the Omotekei knitted fabric of the air permeability is 316cc / cm ² · sec, Urakei knitted fabric of the air permeability is 400cc / cm ²
・ It was more than sec.
This vehicle ceiling interior fabric has a vertical elongation of 33%, a horizontal elongation of 69%, and a vertical elongation of 47.8% of the horizontal elongation. The vertical elongation was 66%, the horizontal elongation was 70%, the warp knitted fabric vertical elongation was 40%, and the horizontal elongation was 98%.
This vehicle ceiling interior fabric has an elongation recovery rate of 1% after the warp extension, and an elongation recovery rate of 8% after the warp extension. 12.5% of the rate, and the recovery rate after the warp knitting of the surface warp knitted fabric is 16%, and the recovery rate of the warp knitted fabric after the warp elongation is 16%. The recovery rate was 3%, and the recovery rate after the horizontal elongation was 26%.

(Conventional example 1)
Three reeds L _1, L _2, knitting a polyester crimped fibers multifilament yarn of single fiber fineness 2.4 dtex · total fineness 84dtex the first all reed needle reed L ₁ tricot warp knitting machine having a L ₃ Thread it as a second thread L ₂
And the third cocoon L ₃ through a one-in-one-out (1 in, 1 out) yarn of one cocoon needle as a knitting yarn, a polyester non-crimped multifilament yarn having a single fiber fineness of 2.4 dtex and a total fineness of 56 dtex.筬 L ₁
Are operated in the order of the knitting pattern / 1-0 / 2-3 /..., And the second rod L ₂ is operated in the order of the knitting pattern / 1-2 / 2-1 / 1-0 / 0-1 /. operation, and the third reed L ₃
Are operated in the order of the knitting pattern / 1-0 / 0-1 / 1-2 / 2-1 /... To form a non-mesh knitting structure, with a wale density of 36 W / 25.4 mm and a course density of 53 C / 25.4 mm. , Basis weight 133 g / m ²
A tricot warp knitted fabric having a total thickness of 0.6 mm was knitted.
A polyurethane foam sheet having a basis weight of 140 g / m ² × thickness of 3.0 mm and a nonwoven fabric backing material having a basis weight of 60 g / m ² × thickness of 0.2 mm are sequentially bonded to this tricot warp knitted fabric, and the total basis weight is 333 g / m ^2.
The vehicle ceiling interior fabric has a total thickness of 3.8 mm.

The vehicle ceiling interior fabric has an air permeability of 43.2 cc / cm ² · sec, and the tricot warp knitted fabric alone has an air permeability of 171.5 cc / cm ^2.
・ It was sec.
This vehicle ceiling interior fabric has a vertical elongation of 41%, a horizontal elongation of 70%, a vertical elongation of 58.6% of the horizontal elongation, and the tricot warp knitted fabric itself. The vertical growth rate was 44%, and the horizontal growth rate was 76%.
This vehicle ceiling interior fabric has an elongation recovery rate of 4% after the vertical extension, and a horizontal recovery rate of 9% after the horizontal extension, and the recovery rate after the vertical extension is the recovery of the elongation after the horizontal extension. The elongation recovery rate after the warp of the tricot warp knitted fabric was 11%, and the elongation recovery rate after the horizontal extension was 40%.

(Conventional example 2)
Three reeds L _1, L _2, polyester non-crimped fiber multifilament yarn of single fiber fineness 2.4 dtex · total fineness 56dtex to all reed needles of the first reed L ₁ tricot warp knitting machine having a L ₃ a Thread as a knitting thread, 2nd heel L ₂
When passed through the third reed L ₃ in Wan'in One out of skipping reed needle one of the polyester crimped fiber multi-filament yarn of a single fiber fineness 1.2dtex · total fineness 84dtex as knitting yarn (1in · 1out), the first reed L ₁
Are operated in the order of the knitting pattern / 4-5 / 1-0 /..., And the second rod L ₂ is operated in the order of the knitting pattern / 2-3 / 2-1-1-0 / 1-2 /. operation, and the third reed L ₃
Are operated in the order of the knitting pattern / 1-0 / 1-2 / 2-3 / 2/1... To form a non-mesh knitting structure, with a wale density of 34 W / 25.4 mm and a course density of 46 C / 25.4 mm. , Basis weight 141 g / m ²
A tricot warp knitted fabric having a total thickness of 0.6 mm was knitted.
A polyurethane foam sheet having a basis weight of 140 g / m ² × thickness of 2.7 mm and a nonwoven fabric backing material having a basis weight of 30 g / m ² × thickness of 0.1 mm are sequentially bonded to this tricot warp knitted fabric to obtain a total basis weight of 311 g / m ^2.
The vehicle ceiling interior fabric has a total thickness of 3.4 mm.

The vehicle ceiling interior fabric has an air permeability of 38.5 cc / cm ² · sec, and the tricot warp knitted fabric alone has an air permeability of 41.5 cc / cm ^2.
・ It was sec.
The vertical growth rate of the tricot warp knitted fabric is 18%, the horizontal growth rate is 35%, and the elongation recovery rate of the tricot warp knitted fabric single body is 1.5%. The elongation recovery rate after stretching was 9.5%.

[Appearance evaluation of stitch pattern]
[Vehicle ceiling interior fabric of Example 1]
In the vehicle ceiling interior fabric according to the first embodiment, the surface warp knitted fabric is a one-in-one-out (1 in, one out) in which the knitting yarn A and the knitting yarn B are blown by one heel needle on the first heel L ₁ and the second heel L ₂ . ), Even if passed 3rd L ₃
All reed needle knitting yarn C is non-mesh knitted tissue through the knitting yarn knitting yarn passed through the first guide bar L ₁ A and was passed to the second reed L ₂ B and the third reed L of _Three
Between the needle loop row N and the needle loop row N that follow the wale direction formed by the knitting yarn C passed through the sinker loop Sa and the sinker loop Sb that the knitting yarn B forms and the knitting The sinker loops Sc formed by the yarn C appear to cross each other, and a fine honeycomb stitch pattern by the crossing sinker loops Sa, Sb, Sc and needle loops N is drawn on the surface of the vehicle ceiling interior fabric.
In the vehicle ceiling interior fabric of Example 1, there is a void layer separated via a connecting yarn between the surface warp knitted fabric and the back warp knitted fabric, and sinker loops Sa and Sb of the surface warp knitted fabric are formed in the void layer.・ Sc sinks, and the uneven step between the needle loop N of the surface knitted fabric and the sinker loop Sa, Sb, Sc becomes remarkable, and the honeycomb step on the surface of the surface knitted fabric has the uneven step It will be three-dimensional enough to be perceived.
[Vehicle ceiling interior fabric of Example 2]
Similarly to the first embodiment, the vehicular ceiling interior fabric of the second embodiment is a one-in-one fabric in which the warp knitted fabric has the first heel L ₁ and the second heel L ₂ with the knitting yarn A and the knitting yarn B flying one heel needle. one out even if passed by (1in · 1out), the third reed L ₃
This is a non-mesh knitted structure in which the knitting yarn C is passed through all the heel needles, and a honeycomb-like stitch pattern is drawn on the surface of the surface warp knitted fabric, and a void layer is formed between the surface warp knitted fabric and the back warp knitted fabric Therefore, the honeycomb stitch pattern has a three-dimensional effect to such an extent that the uneven step between the needle loop N and the sinker loop Sa, Sb, Sc can be observed.
[Vehicle ceiling interior fabric of Comparative Example 1]
In the vehicle ceiling interior fabric of Comparative Example 1, the surface warp knitted fabric is blown with the warp knitting yarn for the surface warp knitted fabric at a rate of one for every two heel needles of the first heel L ₁ and the second heel L ₂ . The mesh knitted structure is passed through, and a perforated mesh pattern having large mesh holes with the sinker loop and the needle loop on the front and back is drawn on the surface of the surface warp knitted fabric.
The mesh pattern is three-dimensional so that the back warp knitted fabric is exposed at the bottom of the large mesh hole, and a deep uneven step corresponding to the thickness of the void layer is observed between the surface warp knitted fabric and the back warp knitted fabric. It becomes a feeling.
[Vehicle ceiling interior fabric of Comparative Example 2]
In the vehicle ceiling interior fabric of Comparative Example 2, the surface warp knitted fabric is three-in-one-out (3 in. 1 out) in which every three heel needles are skipped on the first heel L ₁ and the second heel L ₂ , that is, This is a mesh knitting structure in which knitting yarns are blown at a rate of 4 per 4 needles, and a fine perforated mesh pattern with the sinker loop and needle loop on the front and back is drawn on the surface of the surface warp knitted fabric .
[Vehicle ceiling interior fabric of Conventional Example 1]
The vehicle interior ceiling fabric of Conventional Example 1 has no void layer on the back side (sinker loop surface) of the warp knitted fabric, and is an adhesive layer in which polyurethane and the sinker loop are integrated, so that the sinker loop on the back side is polyurethane. As a result, there is almost no step between the needle loop and the stitch pattern of the warp knitted fabric is flat and lacks a three-dimensional effect.
[Vehicle ceiling interior fabric of Conventional Example 2]
There is no void layer on the back side (sinker loop surface) of the warp knitted fabric, and the sinker loop on the back side is pushed up by the polyurethane so that the stitch pattern on the surface of the vehicle ceiling interior fabric of Conventional Example 2 is between the needle loop and the needle loop. There are almost no steps, and it is flat and lacks a three-dimensional effect.

[Evaluation of adhesive exudation degree for construction]
[Vehicle ceiling interior fabric of Example 1]
In the vehicle ceiling interior fabric of Example 1, there is a void layer separated by a connecting yarn between the surface warp knitted fabric and the back warp knitted fabric, and the air permeability of the surface warp knitted fabric is 230 cc / cm ² · sec. The air permeability of the back warp knitted fabric is 112cc / cm ²
-Sec, the back warp knitted fabric is composed of crimped fibers and the adhesive for adhesive construction is difficult to soak into the back warp knitted fabric, even if the adhesive for adhesive construction soaks into the back warp knitted fabric, The soaked adhesive for adhesive construction does not permeate through the void layer and ooze into the surface warp knitted fabric, and the surface of the vehicle ceiling interior fabric is not soiled by the adhesive for adhesive construction.
[Vehicle ceiling interior fabric of Example 2]
Vehicle ceiling interior fabric of Example 2 also, Urakei knitted fabric of the air permeability even in the table warp knitted fabric of the air permeability is 222cc / cm ² · sec is 48cc / cm ²
-It is sec and the adhesive for adhesive construction hardly permeates into the back warp knitted fabric, and similarly to Example 1, the back warp knitted fabric is composed of crimped fibers and the adhesive for adhesive construction is easily absorbed, In addition, since the void layer separated via the connecting yarn is interposed between the front warp knitted fabric and the back warp knitted fabric, the surface of the vehicle ceiling interior fabric is not soiled by the adhesive for adhesive construction.
[Vehicle ceiling interior fabric of Comparative Example 1]
In the vehicle ceiling interior fabric of Comparative Example 1, the air permeability is 400 cc even if there is a gap layer separated via the connecting yarn between the surface warp knitted fabric and the back warp knitted fabric as in Examples 1 and 2. / Cm ²
・ It is more than sec, and the air permeability of the back warp knitted fabric is 400 cc / cm ² · sec or more, and the back warp knitted fabric is composed of non-crimped fibers, so that the adhesive for adhesive construction can easily ooze out. Even if the surface of the vehicle ceiling interior fabric is not directly soiled by the oozing adhesive for adhesive construction, the adhesive for oozing into the back warp knitted fabric is the mesh of the surface warp knitted fabric. The appearance of the vehicle ceiling interior fabric is impaired by the adhesive for adhesive construction which is exposed to the bottom of the hole and permeates into the back warp knitted fabric.
[Vehicle ceiling interior fabric of Comparative Example 2]
In the vehicle ceiling interior fabric of Comparative Example 2, the air permeability is 244 cc even if there is a gap layer separated by a connecting yarn between the surface warp knitted fabric and the back warp knitted fabric, as in Examples 1 and 2. / Cm ²
・ Sec, and the air permeability of the back warp knitted fabric is 400 cc / cm ² · sec or more, and the adhesive for adhesive construction easily oozes out, and the adhesive for adhesive construction oozes out and the vehicle ceiling interior fabric Stain is likely to occur on the surface.
[Vehicle ceiling interior fabric of Conventional Example 1]
In the vehicle ceiling interior fabric of Conventional Example 1, the polyurethane layer is separated from the backing material to which the adhesive for adhesive application is applied and the warp knitted fabric. As a result, the surface of the vehicle interior ceiling fabric is less likely to be stained.
[Vehicle ceiling interior fabric of Conventional Example 2]
Similarly to Comparative Example 1, the vehicle interior interior fabric of Conventional Example 2 has a polyurethane layer between the backing material to which the adhesive for adhesive construction is applied and the warp knitted fabric. Even if the adhesive soaks, it is absorbed by the polyurethane layer, and a stain on the surface of the vehicle ceiling interior fabric hardly occurs.

[Evaluation of ups and downs of ceiling substrate]
[Vehicle ceiling interior fabric of Example 1]
In the vehicle ceiling interior fabric of Example 1, the vertical elongation rate is 25%, the horizontal elongation rate is 26%, and the vertical elongation rate is 96.1% of the horizontal elongation rate. It is easy to follow the ups and downs of the ceiling board and stretch evenly and work closely.
[Vehicle ceiling interior fabric of Example 2]
The vehicle ceiling interior fabric of Example 2 also has a vertical elongation of 12%, a horizontal elongation of 18%, and a vertical elongation of 66.7% of the horizontal elongation. It is easy to follow the ups and downs of the ceiling board and stretch evenly and work closely.
[Vehicle ceiling interior fabric of Comparative Example 1]
In the vehicle ceiling interior fabric of Comparative Example 1, the vertical elongation rate is equal to 100% of the horizontal elongation rate, but the vertical and horizontal elongation rates are each 9%, which is low, and the ceiling substrate is uneven. It is difficult to follow.
[Vehicle ceiling interior fabric of Comparative Example 2]
In the vehicle ceiling interior fabric of Comparative Example 2, the vertical elongation rate is 33%, the horizontal elongation rate is 69%, and the difference between the vertical elongation rate and the horizontal elongation rate is large. It is difficult to work by extending evenly, and the pattern of the stitch pattern tends to occur on the bonded construction surface.
[Vehicle ceiling interior fabric of Conventional Example 1]
In the vehicle ceiling interior fabric of Conventional Example 1, the vertical elongation is 41%, the horizontal elongation is 70%, and the vertical elongation is slightly different from the horizontal elongation, If care is taken so that pattern distortion does not occur in the stitch pattern, it is possible to follow the undulation of the ceiling substrate and perform close contact construction.
[Vehicle ceiling interior fabric of Conventional Example 2]
In the vehicle ceiling interior fabric of Conventional Example 2, the vertical / horizontal elongation rate was not measured, but it stretched evenly following the undulations of the ceiling substrate, and it was in close contact without any pattern distortion of the stitch pattern I can do it.

[Evaluation of stretchability]
[Vehicle ceiling interior fabric of Example 1]
In the vehicle interior ceiling fabric of Example 1, the elongation recovery rate after the vertical extension is 3%, the elongation recovery rate after the horizontal extension is 5%, and the elongation recovery rate after the vertical extension is the horizontal extension. Since it is 60% of the subsequent elongation recovery rate, it does not shrink and warp during extension construction, and it is easy to construct without stretching and generating wrinkles.
[Vehicle ceiling interior fabric of Example 2]
In the vehicle ceiling interior fabric of Example 2, as in Example 1, the elongation recovery rate after the vertical elongation is 3%, the elongation recovery rate after the horizontal elongation is 5%, and the elongation after the vertical elongation is Since the recovery rate is 60% of the elongation recovery rate after the horizontal extension, it does not shrink and warp during the extension work, and it can be easily extended without causing wrinkles.
[Vehicle ceiling interior fabric of Comparative Example 1]
In the vehicle ceiling interior fabric of Comparative Example 1, the elongation recovery rate after the vertical extension is 1%, and even when the horizontal elongation recovery rate is 2%, the elongation recovery rate after the vertical extension is horizontal. It is 50% of the elongation recovery rate after stretching, so it does not shrink and warp during stretching construction, but the elongation rate of the vertical and horizontal is 9% each, and it stretches sufficiently so that wrinkles do not occur It seems to be difficult to construct it.
[Vehicle ceiling interior fabric of Comparative Example 2]
In the vehicle ceiling interior fabric of Comparative Example 2, the elongation recovery rate after the vertical extension is 1%, and the elongation recovery rate after the horizontal extension is 8%, which is caused by the difference in the vertical recovery rate of the vertical and horizontal As a result, the pattern of the knitted fabric pattern is likely to be distorted, and the elongation recovery rate after the warp knitting of the back warp knitted fabric (3%) and the elongation recovery rate after the warp knitting of the warp knitted fabric (16%) are increased. A warp caused by the difference is felt.
[Vehicle ceiling interior fabric of Conventional Example 1]
In the vehicle ceiling interior fabric of Conventional Example 1, the rate of recovery of elongation after vertical extension is 4%, the rate of recovery of elongation after horizontal extension is 9%, and the rate of recovery of elongation after vertical extension is horizontal Since it is 44.4% of the subsequent elongation recovery rate, it is easy to construct without contracting and warping during stretching construction and without generating wrinkles.
[Vehicle ceiling interior fabric of Conventional Example 2]
In the vehicle ceiling interior fabric of Conventional Example 2, neither the vertical or horizontal elongation rate nor the elongation recovery rate was measured, but the fabric stretched evenly following the undulation of the ceiling substrate, accompanied by a pattern distortion of the knitted fabric pattern It is possible to work closely without any problems.

[Evaluation of touch and texture]
[Vehicle ceiling interior fabric of Example 1]
In the vehicle ceiling interior fabric of Example 1, since there is a void layer between the back warp knitted fabric, the surface warp knitted fabric has a soft cushioning property.
[Vehicle ceiling interior fabric of Example 2]
Since the vehicle ceiling interior fabric of Example 2 also has a void layer between the back warp knitted fabric and the back warp knitted fabric, as in Example 1, a soft cushioning property is felt on the surface warp knitted fabric.
[Vehicle ceiling interior fabric of Comparative Example 1]
In the vehicle ceiling interior fabric of Comparative Example 1, as with Examples 1 and 2, the surface warp knitted fabric has a mesh knitting structure with a large unevenness difference, although there is a void layer between the back warp knitted fabric and the mesh. Because the perforations are large, there is little contact area to touch the surface warp knitted fabric, and cushioning is not felt as much as the left
[Vehicle ceiling interior fabric of Comparative Example 2]
Since the vehicle ceiling interior fabric of Comparative Example 2 has a void layer between the back warp knitted fabric and the back warp knitted fabric as in Examples 1 and 2, a soft cushioning property is felt on the surface warp knitted fabric.
[Vehicle ceiling interior fabric of Conventional Example 1]
In the vehicular ceiling interior fabric of Conventional Example 1, the adhesive layer between the warp knitted fabric and polyurethane is felt hard, the rebound resilience from polyurethane is felt strong and hard, and lacks cushioning with hard touch compared to Examples 1 and 2. .
[Vehicle ceiling interior fabric of Conventional Example 2]
Similarly to Conventional Example 1, the vehicle interior interior fabric of Conventional Example 2 also feels that the warp knitted fabric and the adhesive layer of polyurethane are hard, and the resilience from polyurethane is felt strong and hard, compared to Examples 1 and 2. Hard touch and lack cushioning.

[Back brushed aptitude]
[Vehicle ceiling interior fabric of Examples 1 and 2]
The vehicle ceiling interior fabrics of Example 1 and 2, the knitting yarn that has been passed through the sixth reed L ₆ constituting the Urakei knitted fabric consists crimped fibers back surface (Urakei knitted fabric) is liable brushed , in which case, the fifth reed L ₅
Since the knitting yarn passed through is made into non-crimped fibers, the back surface does not become abnormally fluffed, and is suppressed by the raised fluff on the back surface, making it difficult for the adhesive for adhesive construction to ooze out from the back warp knitted fabric.
[Vehicle ceiling interior fabric of Comparative Example 1]
In the vehicle ceiling interior fabric of Comparative Example 1, all of the knitting yarns passed through the fifth heel L ₅ and the sixth heel L ₆ constituting the back warp knitted fabric are non-crimped fibers. The back warp knitted fabric is difficult to be raised, and the effect of suppressing the seepage of the adhesive for bonding by the raised fluff cannot be obtained.
[Vehicle ceiling interior fabric of Comparative Example 2]
In the vehicle ceiling interior fabric of Comparative Example 2, since all of the knitting yarns passed through the fifth heel L ₅ and the sixth heel L ₆ constituting the back warp knitted fabric are crimped fibers, the back surface (back When the raising treatment is applied to the warp knitted fabric, the fluffing is abnormally caused and the back warp knitted fabric is torn, and the effect of suppressing the exudation of the adhesive for bonding by the raising treatment cannot be obtained.
[Vehicle ceiling interior fabric of conventional example 1 and 2]
In the conventional tricot knitted fabric of Examples 1 and 2, since there is no void layer between the front and back surfaces, the surface fibers are disturbed when raising the back surface, so the back material (nonwoven fabric) is not subjected to the raising treatment on the back surface. Must be bonded together to form a vehicle ceiling interior fabric.

[Comprehensive evaluation]
As described above, in the vehicle ceiling interior fabric of Comparative Example 1, even if there are large mesh holes and rich in undulations, the appearance is easily damaged by the adhesive for construction, and it is difficult to follow the undulations of the ceiling base material. It is difficult to perform adhesive work by stretching it sufficiently without pattern distortion, and even if there is a void layer between the back warp knitted fabric, it lacks cushioning with a hard touch, and it prevents the adhesive from spreading for adhesive work by raising the back surface Cannot be obtained.
In the vehicle ceiling interior fabric of Comparative Example 2, the appearance of the knitted fabric pattern is rich in undulations, and even if there is a void layer between the back warp knitted fabric and soft cushioning, the adhesive construction by raising the back surface The effect of preventing the adhesive from leaching is not obtained, the adhesive for construction tends to ooze out on the surface, and it is difficult to perform the adhesive construction by following the undulations of the ceiling base material and evenly extending without wrinkles or pattern distortion.
In the vehicle ceiling interior fabric of Conventional Examples 1 and 2, a backing material has to be bonded to the raw warp knitted fabric, and the back side of the warp knitted fabric is an adhesive layer with polyurethane, and feels rough, There is almost no step between the sinker loop and needle loop of the warp knitted fabric, and the stitch pattern is flat and lacks a three-dimensional effect, and lacks cushioning properties with a hard touch.
On the other hand, the vehicle ceiling interior fabrics of Examples 1 and 2 of the present invention have rich undulations in the appearance of the knitted fabric pattern, and the effect of suppressing the exudation of the adhesive for adhesive construction by the back raising is obtained. The surface is not polluted by the agent, and it can be stretched and bonded without causing wrinkles or pattern distortion by following ups and downs of the ceiling base material. In addition, there is a void layer between the back warp knitted fabric, the touch and texture are soft touch, and cushioning is rich.

[Data table]
[Table 1] summarizes the specifications, air permeability, elongation rate, and elongation recovery rate of the warp knitted fabrics of Examples 1 and 2, Comparative Examples 1 and 2, and Conventional Examples 1 and 2.
[Table 2] summarizes the evaluation of the vehicle ceiling interior fabrics of Examples 1 and 2, Comparative Examples 1 and 2, and Conventional Examples 1 and 2.

It is the surface warp knitted fabric surface enlarged view of the vehicle ceiling interior fabric of Example 1-2 of this invention. It is the knitting | organization organization chart of the vehicle ceiling interior fabric of the Example of this invention, a comparative example, and a prior art example.

Explanation of symbols

A, B, C: Knitting yarn N: Needle loop Sa, Sb, Sc: Sinker loop

Claims (7)

(A) The fabric weight of the entire fabric is 200 to 450 g / m ² ;
(B) The total thickness of the entire fabric is 2 to 4 mm,
(C) the air permeability of the whole fabric is vehicle roof interior fabric 10~120cc / cm ² · sec,
(D) a double warp knitted fabric knitted by connecting the front warp knitted fabric and the back warp knitted fabric with connecting yarns;
(E) The outer surface of the back warp knitted fabric is constituted by a needle loop with a non-mesh knitted structure,
(F) The back warp knitted fabric constituting the back surface is constituted by several kinds of knitting yarns passed through a plurality of rivets of two or more rivets, and the knitting yarn passed through at least one of the creases is Composed of crimped fibers,
(G) A vehicle ceiling interior fabric characterized in that the air permeability of the back warp knitted fabric is less than the air permeability of the surface warp knitted fabric and is 120 cc / cm ² · sec or less. (H) The knitting yarn passed through at least one of the several types of knitting yarns constituting the back warp knitted fabric is made of non-crimped fibers, and the outer surface of the back warp knitted fabric is raised. The vehicle interior ceiling fabric according to claim 1, wherein: (I) Vertical and horizontal growth rates are 10% to 100%,
(J) The vehicle ceiling interior fabric according to any one of claims 1 to 2, wherein an elongation recovery rate after the vertical and horizontal elongation is 15% or less, respectively. (K) The air permeability of the back warp knitted fabric is 70% or less of the air permeability of the surface warp knitted fabric,
(L) Either of the vertical growth rate and the horizontal growth rate, whichever is less, is greater than 50% of the other growth rate.
(M) Either of the elongation recovery rate after the elongation of the vertical and the elongation recovery rate after the elongation of the horizontal, whichever is smaller, which is greater than 30% of the other elongation recovery rate. The vehicle ceiling interior fabric according to claim 1. (N) The single fiber fineness of the knitting yarn of the surface warp knitted fabric and the back warp knitted fabric is 6 dtex or less, and the total fineness of the connecting yarn constituting the void layer by connecting the surface warp knitted fabric and the back warp knitted fabric. Is smaller than the total fineness of the knitting yarn passed through at least any one of several types of knitting yarns that pass through a plurality of ridges of two or more cocoons to form a back warp knitted fabric The vehicle ceiling interior fabric according to any one of claims 1 to 4. (O) The surface warp knitted fabric is composed of several types of knitting yarns (A, B, C) passed through a plurality of ridges (L ₁ , L ₂ , L ₃ ) of _two or more ridges. either in at least two guide bars (L ₁ · L ₂₎ to the threaded knitting yarn (a · B) is supra claims 1 to 5 are knitted are swung in opposite directions to each other in the course direction The vehicle ceiling interior fabric described in 1. (P) The surface warp knitted fabric is composed of several kinds of knitting yarns (A, B, C) passed through a plurality of ridges (L ₁ , L ₂ , L ₃ ) of 3 sheets or more,
(Q) The vehicle ceiling interior fabric according to any one of claims 1 to 6, wherein the knitting yarn passed through at least one of the plurality of ridges is formed of crimped fibers.

Images