JP2010036389A - Vehicular fiber laminate and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure that a back base cloth is burned well in balance longitudinally and widthwise in order to pass the US automotive safety standard FMVSS302. <P>SOLUTION: A vehicular fiber laminate 2 is of such a structure that a skin material 4, a cushioning material 6 and a back base cloth 8 are stacked over each other. The back base cloth 8 is obtained by mutually stacking a plurality of short fibers in crisscross fashion and then confounding the short fibers three-dimensionally. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fiber laminate for a vehicle in which a skin material, a cushion material, and a back base fabric are laminated, and a method for manufacturing the same.

  Since this type of fiber laminate is exclusively used as a vehicle interior material, it is necessary to satisfy various flame retardant regulations. For example, in the general flame retardant regulation “US automobile safety standard FMVSS302”, the burning speed (burning distance per unit time) when the burner flame is applied to the fiber laminate under a certain condition is 100 mm / min or less. Desired.

Therefore, a technique for controlling the burning rate of the fiber laminate is known by paying attention to one of the burning behavior of the fiber laminate (behavior in which only the backing fabric burns) (Patent Document 1 and Patent Document 2). In these known techniques, by adopting a material (the material of the back base fabric) in which only the back base fabric burns stably and the burning rate is lower than the standard, the burning rate of the fiber laminate is set to a reference value or less. To do.
For example, in patent document 1, the burning rate of a fiber laminated body can be 50-60 mm / min by using the backing base fabric (weight per unit area of 60 g / m < ² > or more) of a cellulosic fiber.

Moreover, in patent document 2, the burning rate of a fiber laminated body can be 70-80 mm / min by using the back base fabric formed by physically entanglement of a cellulose short fiber (fiber length of 100 mm or less). . In this known technique, a plurality of short fibers are randomly accumulated on a belt conveyor, and then three-dimensionally entangled by a water punch (jet of high-pressure water) to form a backing fabric that is relatively excellent in stretch characteristics. Can be manufactured.
Japanese Patent No. 3419611 JP 2001-341220 A

However, in the above-described known fiber laminates, the clear cause is unknown, but sometimes the combustion speed is uneven (combustion behavior becomes unbalanced).
Therefore, referring to FIG. 4B, from the fiber laminate of the above-mentioned Patent Document 2, a “longitudinal sample” that is long in the conveying direction of the belt conveyor and a “horizontal sample” that is long in the direction orthogonal to this are obtained. Collected. And when the burning rate of each sample was measured in accordance with the US automobile safety standard, the result that the burning rate of the vertically long sample was obviously high was obtained (see the comparative example in [Table 2]). That is, according to the known technique, the combustion behavior of the backing fabric is unbalanced in the vertical and horizontal directions, and the combustion speed in the vertical direction (conveying direction of the belt conveyor) tends to increase.
For this reason, even in the case of using a cellulosic fiber backing fabric, there is a possibility that the known fiber laminate does not meet US automobile safety standards depending on the combination with other configurations (skin material and cushioning material). It was suggested that there is.

Therefore, as a result of intensive studies, the present inventors have found that the short fibers of the back base fabric are arranged in parallel (directly arranged) with respect to the conveying direction of the belt conveyor as a cause of unbalanced combustion behavior. It was found that the combustion of was promoted. In addition, although the clear factor which a short fiber arranges in a straight line is unknown, it is thought that a short fiber naturally orientates in the conveyance direction of a belt conveyor by the impact of a water punch etc., for example.
Thus, the present invention was devised in view of the above points, and the problem to be solved by the present invention is that the back base fabric is well balanced in the vertical and horizontal directions in order to more reliably clear the US automobile safety standard FMVSS302. There is to burn.

As means for solving the above-described problems, the vehicle fiber laminate according to the first invention is configured by laminating a skin material, a cushion material, and a back base fabric. And since this kind of fiber laminated body is exclusively used for a vehicle interior material, it is desired to satisfy US automobile safety standard FMVSS302.
Therefore, in the present invention, the above-mentioned backing base fabric is configured by laminating a plurality of short fibers (typically cellulosic short fibers) in an intersecting manner and then entwining the short fibers three-dimensionally. In this way, a plurality of short fibers are laminated in an intersecting manner (positively arranged in an intersecting manner) to prevent or reduce the orientation of the short fibers in either the vertical or horizontal direction, thereby balancing the backing fabric in the vertical and horizontal directions. Can burn well.

The method for manufacturing a fiber laminate for a vehicle according to the second invention is a method for manufacturing the fiber laminate of the first invention, and includes the following four steps (arrangement step, multi-layer step, entanglement step, joining step). .
That is, in the arrangement step of the present invention, a first belt-like web composed of a plurality of carded short fibers (a first belt-like web in which short fibers are arranged substantially in parallel in the length direction of the web) is zigzag-shaped on a belt conveyor. While being folded, the crossing is arranged along the conveying direction of the belt conveyor.
Next, in the multi-layer process, the second belt-shaped web composed of a plurality of short fibers carded is folded in a zigzag shape on the belt conveyor, and crossed along the conveying direction of the belt conveyor, A laminated web formed by laminating the second belt-like web is formed. By carrying out like this, the lamination | stacking web formed by laminating | stacking the short fiber of both webs in the cross shape can be formed comparatively easily.
Next, in the entanglement step, the short fibers of the laminated web described above are entangled physically or mechanically three-dimensionally (in order not to deteriorate the elongation characteristics as much as possible) to obtain a backing base fabric.
And a fiber laminated body of 1st invention can be manufactured comparatively easily by laminating | stacking a skin material, a cushioning material, and a back base fabric in this order, and joining them by a joining process.

The manufacturing method of the fiber laminated body for vehicles which concerns on 3rd invention is a method of manufacturing the fiber laminated body of 1st invention, Comprising: The following 3 processes (an arrangement | positioning process, a confounding process, a joining process) are provided.
That is, in the arrangement process of the present invention, the first belt-like web composed of a plurality of short fibers carded is folded in a zigzag manner on the belt conveyor while being folded in four layers, and crossed along the conveying direction of the belt conveyor. To do. Then, in the entanglement step, the short fibers of each layer of the first belt-like web are entangled physically or mechanically three-dimensionally to produce a backing base fabric (while omitting the above-described multi-layer step). In the joining step, the skin material, the cushion material, and the back base fabric are laminated in this order and then joined to obtain the fiber laminate of the first invention.

  According to the fiber laminate of the first invention of the present invention, the back base fabric can be burned in a well-balanced manner in the vertical and horizontal directions in order to more reliably clear the US automobile safety standard FMVSS302. According to the second invention, the fiber laminate according to the first invention can be manufactured relatively easily. And according to 3rd invention, the fiber laminated body which concerns on 1st invention can be manufactured still more easily.

The best mode for carrying out the present invention will be described below with reference to FIGS.
<Embodiment 1>
The vehicle fiber laminate 2 according to the present embodiment is configured by laminating a skin material 4, a cushion material 6, and a back base fabric 8 with reference to FIG. 1 (details of each configuration will be described later). . And since this kind of fiber laminated body 2 is exclusively used for a vehicle interior material, it is desired to satisfy US automobile safety standard FMVSS302.
Therefore, in the present embodiment, the back base fabric 8 described later is burned in a well-balanced manner in the vertical and horizontal directions in order to more reliably clear the above-mentioned standard. And the fiber laminated body 2 of this embodiment can be manufactured comparatively easily by the manufacturing method mentioned later.

[Production method of fiber laminate]
The manufacturing method of the fiber laminated body 2 of this embodiment has four processes (an arrangement | positioning process, a multilayer process, an entanglement process, a joining process) (refer FIGS. 1-3). And after manufacturing the back base fabric 8 in an arrangement | positioning process, an overlaying process, and a confounding process, the skin material 4, the cushion material 6, and the back base fabric 8 are laminated | stacked in this order at the joining process, and it is set as the fiber laminated body 2. .
Accordingly, each of these manufacturing steps will be described in detail together with each configuration of the fiber laminate 2.

[Arrangement process]
In the arranging step, referring to FIGS. 2 and 3, the first belt-like web 10 composed of a plurality of short fibers (details will be described later) is folded in a zigzag manner on the first belt conveyor 38, and the conveying direction of the belt conveyor. Cross along F. The first belt conveyor 38 is configured by linearly arranging a first belt conveyor 38a for web conveyance and a first belt conveyor 38b (mesh shape) for web entanglement.
Then, referring to FIG. 2 (a), after the raw fibers, which are short fibers, are input to the cotton opening machine 30, the fibers are opened and supplied onto the second belt conveyor 32 (disposed orthogonally to the first belt conveyor 38a). To do. Then, the thin belt-like first web 10 (width W1) is obtained by rolling the short fibers stacked on the second belt conveyor 32 with the card roller 34 (by performing carding). By this carding operation, it is possible to manufacture the first belt-like web 10 in which short fibers are arranged substantially parallel to the length direction of the web.
Then, the first web 10 is guided by the second belt conveyor 32 into the cross wrapper 36 disposed above the first belt conveyor 38a.

  Next, referring to FIG. 3A, the first belt web 10 is moved to the first belt conveyor while the cross wrapper 36 is sequentially reciprocated in the width direction of the first belt conveyor 38a (direction perpendicular to the conveying direction F). 38a is supplied while folded in a zigzag shape. At this time, the reciprocating speed of the cross wrapper 36 with respect to the conveying speed of the first belt conveyor 38a is adjusted, and the first web 10 is folded along the conveying direction F while being folded on the first belt conveyor 38a at an angle θ1. (Cross layer) The folded state of the first belt-like web 10 will be described in detail in a second embodiment described later (see FIG. 6).

(Short fiber)
Here, the short fiber is typically a fiber (natural fiber or synthetic fiber) having a fiber length of 100 mm or less, preferably a short fiber of 30 mm to 70 mm, and more preferably a short fiber of 38 mm to 64 mm. In this embodiment, cellulosic short fibers (for example, vegetable fibers such as viscose rayon fibers, cupra rayon fibers, or cotton fibers) are used. This cellulose short fiber generally burns stably and burns while carbonizing itself, so that it can suppress the combustion of the skin material 4 and the cushion material 6 described later (has a combustion suppressing effect).
Moreover, in this embodiment, the short fiber which consists of synthetic fibers (For example, a polyethylene terephthalate, an acryl, a polyamide, or an acetate) can also be mixed with the above-mentioned cellulose short fiber. Among these, polyethylene terephthalate (PET) is excellent in durability as compared with other synthetic fibers, and can be suitably used as a synthetic fiber because it is relatively difficult to burn.
At this time, when the total weight is 100, the typical material mixing ratio is cellulose short fiber: synthetic fiber = 50: 50 to 80:20 by weight ratio, preferably cellulose short fiber: synthetic fiber = 55: 45-75: 25. By setting this mixture ratio range, the combustion suppressing action of the backing base fabric 8 derived from the cellulose short fibers can be suitably achieved.

[Multilayer process]
In the multi-layer process, the second web 12 is arranged in an intersecting manner while being folded zigzag on the first belt conveyor 38a to form a laminated web 14 described later. The second belt-like web 12 (width dimension W1) is composed of a plurality of carded short fibers, and the short fibers are arranged substantially in parallel in the length direction of the web.
Then, the second web 12 is introduced into the cross wrapper 36 by the third belt conveyor 33 arranged in parallel with the second belt conveyor 32 with reference to FIG.

  Then, by the reciprocating motion of the cross wrapper 36 (in synchronization with the supply of the first belt-like web 10), the second belt-like web 12 is angled on the first belt conveyor 38a by the angle θ2 (the same angle as the angle θ1 in this embodiment). While being folded in a zigzag shape, they are arranged so as to cross along the conveying direction F of the belt conveyor. Thus, the laminated web 14 formed by laminating the first belt-like web 10 and the second belt-like web 12 is formed (see FIG. 3C). And on the laminated web 14, the short fiber of the 1st strip | belt-shaped web 10 and the short fiber of the 2nd strip | belt-shaped web 12 will be laminated | stacked.

[Entanglement process]
In the entanglement step, referring to FIG. 2 (b), the short fibers of the laminated web 14 are entangled three-dimensionally to form the back base fabric 8.
More specifically, the laminated web 14 is conveyed from the first belt conveyor 38a (for conveyance) onto the first belt conveyor 38b (for entanglement). Then, the laminated web 14 is entangled three-dimensionally by a physical entanglement method such as a water punch 40 or a mechanical entanglement method such as a needle punch to form a back base fabric 8. By doing so, the short fibers are closely intertwined with each other, and a stable base fabric 8 (non-woven fabric) can be obtained simply by intertwining the fibers without using an adhesive or heat fusion. In particular, as in this embodiment, the short fibers of the laminated web 14 are entangled three-dimensionally by the water punch 40 (jet of high-pressure water), thereby mixing impurities such as machine oil (impurities that promote combustion). Can be eliminated as much as possible.
The back base fabric 8 is passed between heating rollers (42 a, 42 b, 42 c) to remove excess moisture, and then taken up by a take-up roller 44.

[Joint process]
In the joining step, referring to FIG. 1, the skin material 4, the cushion material 6, and the back base fabric 8 are arranged in this order, and then joined by a technique such as sewing, adhesion, or welding (laminating).
(Skin material)
Here, the skin material 4 is a member that constitutes the design surface of the fiber laminate 2, and is composed of, for example, a jersey, a fabric, a moquette, a tricot, natural leather, artificial leather, or a synthetic resin sheet.
Material and basis weight of the skin material 4 is not particularly limited but, for example, the typical skin material 4 made of PET, basis weight is ^{250g / m 2 ~650g / m 2} . In addition, although the skin material 4 may be subjected to a flame retardant treatment separately, it is preferable not to perform the flame retardant treatment from the viewpoint of cost.

(Cushion material)
Moreover, the cushion material 6 should just be provided with the cushioning property which ensures a passenger | crew's seating property, for example, is comprised with a polyurethane foam, a polyethylene foam, or a polyester foam. As the cushion material 6, it is desirable to use a polyurethane foam (density: 10 kg / m ^{3 to} 30 kg / m ³ ) having excellent sag resistance. The polyurethane foam may be subjected to a flame retardant treatment separately, but it is preferable not to perform the flame retardant treatment from the viewpoint of cost.

(Back fabric)
As described above, the back base fabric 8 is configured by three-dimensionally interlacing the short fibers after laminating a plurality of cellulose short fibers in a cross shape. And this back base fabric 8 can be burned with good balance in length and breadth because a plurality of short fibers are actively crossed and the short fibers are prevented or reduced from being oriented in either length or width. .
Moreover, since the back base fabric 8 of this embodiment is intertwined with short fibers but is not restrained from movement, the back base fabric 8 is flexible and lightweight and has suitable elongation characteristics.
And the back base fabric 8 of this embodiment has a flame-retardant effect by the arrangement state of a cellulose short fiber, and it is not necessary to mix | blend a flame-retardant processing agent separately. In addition, it is desirable not to use a general flame retardant treatment material (chlorinated organic phosphorus compound or the like) for the back base fabric 8 in order to induce a fogging phenomenon (so-called fogging phenomenon) of an automobile window.

The basis weight of the back base fabric 8 is typically ^{20g / m 2 ~60g / m 2} , preferably ^{30g / m 2 ~60g / m 2} . Here, when the basis weight of the back base fabric 8 is less than 20 g / m ^2, it becomes difficult to exert a combustion suppressing action on other materials (skin material 4 and cushion material 6). In addition, although the fabric weight of the back base fabric 8 may be larger than 60 g / m < ² >, while it becomes high cost, the weight of the fiber laminated body 2 increases more than necessary. And the backing fabric 8 can be burned stably by setting the basis weight of the backing fabric 8 to a range setting of 40 g / m ² or more and 60 g / m ² or less.

[Fiber laminate]
The vehicle fiber laminate 2 manufactured by the above-described manufacturing method includes a back base fabric 8 (cross-layer-shaped back base fabric 8) in which a plurality of short fibers are positively arranged in an intersecting manner. And the fiber laminated body 2 can clear a US automobile safety standard more reliably by burning this back base fabric 8 in the vertical and horizontal balance (refer to [Table 2]).
Moreover, the fiber laminated body 2 of this embodiment is equipped with the elongation characteristic suitable as a vehicle interior material by having physically entangled the short fiber of the back base fabric 8. FIG. In particular, since the fiber laminate 2 is formed by crossing the short fibers of the back base fabric 8 in an intersecting manner, the fiber laminate 2 has a well-balanced stretch characteristic in the vertical and horizontal directions, and is a skin cover material that covers a three-dimensional structure such as a vehicle seat. It can be preferably used (see [Table 2]).

<Embodiment 2>
Since the manufacturing method of the fiber laminated body of this embodiment is provided with the fundamental structure substantially the same as the above-mentioned Embodiment 1, a common structure etc. attaches | subjects a corresponding code | symbol and abbreviate | omits detailed description.
And the manufacturing method of the fiber laminated body which concerns on this embodiment is equipped with the following three processes (an arrangement | positioning process, a confounding process, and a joining process).
That is, in the arrangement process of this embodiment, referring to FIG. 6, the first belt-like web 10 is folded in four layers while being folded in a zigzag manner on the first belt conveyor 38a, and in the conveying direction F of the belt conveyor F. Intersect along. At this time, by appropriately considering the width dimension W1 of the first strip web 10 and the folding width dimension (cross layer swing width) W2, the folding angle θ1 of the first strip web 10 is set to 16 ° to 22 °. The first web 10 can be folded into four layers. And also in this embodiment, the short fiber of each layer of the 1st strip | belt-shaped web 10 will be laminated | stacked in cross shape.

And the short fiber of each layer of the 1st strip | belt-shaped web 10 is entangled physically or mechanically three-dimensionally in the entanglement process, and it is set as the back base fabric 8. FIG. In the joining step, the skin material 4, the cushion material 6, and the back base fabric 8 are laminated in this order and then joined to obtain a fiber laminate.
According to this embodiment, the fiber laminated body which concerns on this embodiment can be manufactured by the comparatively simple structure which abbreviate | omitted the said multilayer process and its structure (2nd strip | belt-shaped web 12, the 3rd belt conveyor 33). .

[Test example]
Hereinafter, although this Embodiment is demonstrated based on a test example, this invention is not limited to a test example.
In this test, it was decided to use the back base fabric 8 of Example 1 and the back base fabric 9 of Comparative Example 1 according to the configuration and manufacturing method of [Table 1] below (see FIG. 4).

(Fiber laminate of Example 1)
And the fiber laminated body 2 of Example 1 was manufactured by laminating and joining the skin material 4, the cushion material 6, and the back base fabric 8 in this order (see FIGS. 4 and 5).
In this example, a PET jersey (weight per unit area: 400 g / m ² ) was used as the skin material 4. Further, polyurethane foam (density: 20 Kg / m ³ , plate thickness: 1.3 mm) was used as the cushion material 6. In addition, the skin material 4, the cushion material 6, and the back base fabric 8 used what was not mixed with the flame-retardant processing material.

(Fiber laminate of Comparative Example 1)
Moreover, the fiber laminated body 20 of the comparative example 1 was manufactured by laminating | stacking and joining the skin material 4, the cushion material 6, and the back base fabric 9 in this order (refer FIG.4 and FIG.5). The detailed configuration of the skin material 4 and the cushion material 6 is the same as that of the first embodiment.

(Test method)
And from the fiber laminated body 2 of Example 1, "vertically long sample Sh1" (350 mm long x 100 mm wide) long in the conveyance direction F of the belt conveyor was collected. Further, a “horizontal sample Sw1” (length 100 mm × width 350 mm) that was long in a direction orthogonal to the same direction F was collected (see FIG. 4A).
Then, the maximum burning rates of these “longitudinal sample Sh1” and “laterally long sample Sw1” were measured in accordance with US automobile safety standard FMVSS302 (see FIG. 5).
Further, the breaking elongation and tensile strength of the “back base fabric of the vertically long sample Sh1” and the “back base fabric of the horizontally long sample Sw1” were measured in accordance with “JIS L1018 8.13 tensile strength and elongation”.

Similarly, “longitudinal sample Sh2” and “horizontal sample Sw2” were collected from the fiber laminate 20 of Comparative Example 1 as in Example 1 (see FIG. 4B). Then, the maximum burning rate of each of these “longitudinal sample Sh2” and “laterally long sample Sw2” was measured in accordance with US automobile safety standard FMVSS302.
Further, the breaking elongation and tensile strength of the “back base fabric of the vertically long sample Sh2” and the “back base fabric of the horizontally long sample Sw2” were measured according to “JIS L1018 8.13 tensile strength and elongation”.

The measurement results of each test are shown in [Table 2] below.

(Maximum burning rate test results)
In the fiber laminate 2 of Example 1, the difference between the maximum burning rate of the “longitudinal sample Sh1” and the maximum burning rate of the “horizontal sample Sw1” was extremely small. Both samples had combustion rates (30 mm / min to 40 mm / min) that cleared the standard of the US automobile safety standard FMVSS302.
From this, it has been found that according to the fiber laminate 2 of Example 1, the U.S. automobile safety standards can be cleared more reliably by the back base fabric 8 burning in a good balance between length and width.

On the other hand, in the fiber laminate 20 of Comparative Example 1, the difference between the maximum combustion rate of the “longitudinal sample Sh2” and the maximum combustion rate of the “laterally long sample Sw2” was extremely large (the vertical and horizontal combustion behavior was undefined). It was a balance). In particular, the maximum burning rate of the vertically long sample Sh2 was the upper limit (100 mm / min) of the US automobile safety standard.
The unbalanced combustion speed in Comparative Example 1 is presumed to be because combustion in the same direction was promoted by arranging the short fibers of the back base fabric 9 perpendicularly to the conveying direction F of the belt conveyor. From this, the fiber laminate 20 (back base fabric 9) of Comparative Example 1 may not meet US automobile safety standards depending on the combination with other configurations (skin material 4 and cushion material 6). It was strongly suggested.

(Test results of elongation at break and tensile strength)
In the fiber laminate 2 of Example 1, the difference between the breaking elongation of the “back base fabric of the vertically long sample Sh1” and the breaking elongation of the “back base fabric of the horizontally long sample Sw1” is small. % To 70%). Similarly, the difference between the tensile strength of the “back base fabric of the vertically long sample Sh1” and the tensile strength of the “back base fabric of the horizontally long sample Sw1” was small, and both were suitable values (about 40 N / 25 mm).
From this, it was found that the fiber laminate 2 (back base fabric 8) of Example 1 had a good balance of longitudinal and lateral elongation characteristics and had elongation characteristics that could be suitably used as a vehicle interior material.

That is, in the fiber laminate 2 of Example 1, the breaking elongation of the back base fabric 8 is relatively high and is easy to stretch. For this reason, when the fiber laminate 2 is used, for example, as a skin cover material for a vehicle seat, the fiber laminate 2 can be neatly stretched corresponding to the outer shape of the seat without generating wrinkles and twists as much as possible (appearance and seating feeling). It will be a good finish).
Moreover, since the tensile strength of the back base fabric 8 is moderately low, the fiber laminate 2 can be stably pulled. For example, sewing work is involved in the production of the skin cover material. At this time, if the skin cover material (fiber laminate 2) can be stably pulled, the sewing work is facilitated and a clean sewing line is formed. (It will be a nice looking finish).
For this reason, it turned out that the fiber laminated body 2 (back base fabric 8) of a present Example can be used conveniently for the skin cover material etc. which coat | cover three-dimensional structures, such as a vehicle seat.

On the other hand, in the fiber laminate 20 of Comparative Example 1, the difference between the breaking elongation of the “back base fabric of the vertically long sample Sh2” and the breaking elongation of the “back base fabric of the horizontally long sample Sw2” was extremely large. It was. Similarly, the difference between the tensile strength of the “back base fabric of the vertically long sample Sh2” and the tensile strength of the “back base fabric of the laterally long sample Sw2” was extremely large.
In particular, the breaking elongation of the “back base fabric of the vertically long sample Sh2” was as extremely low as 35.01% (difficult to stretch). Furthermore, the tensile strength of the “back base fabric of the vertically long sample Sh2” was as extremely high as 65.9 N / 25 mm (it was difficult to pull). For this reason, it turned out that the fiber laminated body 20 (back base fabric 9) is a little unsuitable for using as a vehicle interior material.
Therefore, in the fiber laminate 2 (back base fabric 9) of this comparative example, when used as a vehicle interior material (particularly, a skin cover material), there is a concern that the finish may be adversely affected.

The vehicle fiber laminate and the manufacturing method thereof according to the present embodiment are not limited to the above-described examples, and may take other various embodiments.
(1) In the arrangement step of the present embodiment, a dry method in which raw fibers (short fibers) are loosened through a cotton opening machine 30 and then fed onto a belt conveyor (configuration capable of aligning the short fibers more reliably) Explained. On the other hand, if the raw fibers (short fibers) are dispersed in the liquid and then made into a sheet using a paper machine (wet method), the orientation of the short fibers can be aligned. Can be adopted.

(2) Further, in the multi-layer process of the present embodiment, a configuration in which the first belt web 10 and the second belt web 12 are housed and arranged in the same cross wrapper 36 (a rational configuration for supplying both webs in synchronization). Although described, it is not intended to limit the arrangement relationship between these two webs. For example, the first belt-shaped web and the second belt-shaped web may be housed and disposed in separate cross wrappers, and by doing so, both webs can be disposed in an opposing manner across the first belt conveyor.
In the present embodiment, the first belt conveyor 38 is composed of two units, a first belt conveyor 38a for web conveyance and a first belt conveyor 38b (mesh shape) for web entanglement. Unlike this, the entire first belt conveyor 38 (one unit) may be meshed.

(3) Further, the folding angle θ1 and the folding angle θ2 of the belt-like web in the present embodiment are arbitrarily set within a range of more than 0 ° and less than 45 °, as long as the short fibers of each belt-like web can be arranged in an intersecting manner. Can be set to The folding angle θ1 and the folding angle θ2 may be set at the same angle or may be set at different angles.
In addition, in the present Example, although the dimension (W1, W2) of the 1st strip | belt-shaped web 10 and the dimension (W1, W2) of the 2nd strip | belt-shaped web 12 were set identically, the dimension of each strip | belt-shaped web may differ.

(4) In the entanglement process of the present embodiment, the configuration in which the laminated web 14 is entangled physically or mechanically (configuration that gives suitable elongation characteristics to the back base fabric 8) has been described. The purpose is not to use. That is, an amount of adhesive or the like that does not adversely affect the flame retardancy and elongation characteristics of the back base fabric 8 can be used.
(5) In the present embodiment, the fiber laminate 2 composed only of the skin material 4, the cushion material 6, and the back base fabric 8 has been described. However, each of these configurations is a main configuration, and other configurations (resin) A plate or a coating layer).

(6) Moreover, in the present Example, the back base fabric 8 which consists only of a cellulose short fiber was illustrated. In this example, since the flame retardant effect is exhibited depending on the arrangement state of the short fibers, the possibility that other types of short fibers different from the cellulose short fibers can be used is suggested. Examples of other types of short fibers include polyester short fibers, polyamide short fibers, polyacrylonitrile short fibers, polyolefin short fibers, protein short fibers such as polylactic acid, and polyfluoroethylene short fibers such as PTFE. be able to.
In addition, it is desirable for the back base fabric of this example to have the short fibers laminated in a crossing manner on the entire surface, but the short fibers are not partially laminated in a crossing manner unless the stretch properties of the back base fabric are adversely affected. You may have a part.

(7) Moreover, in the present Example, the structure which forms the laminated web 14 in the 1st strip | belt-shaped web 10 or the 2nd strip | belt-shaped web 12 was demonstrated. Unlike this, another belt-like web that is long in the conveying direction F of the first belt conveyor may be layered on at least one of the upper and lower sides of the laminated web 14 (an example of a cross cloth method). The other web is configured by arranging short fibers substantially parallel to the length direction (conveying direction F). With such a configuration, the short fibers of the back base fabric can be more reliably laminated in a crossed state.
Moreover, it is good also as a structure which inserts said other strip | belt-shaped web between the 1st strip | belt-shaped web 10 and the 2nd strip | belt-shaped web 12. FIG.
(8) Moreover, in Example 2, it is good also as a structure (other example of a Chris cross system) which laminates | stacks the said other strip | belt-shaped web at least on either the upper or lower side of a 1st strip | belt-shaped web. With such a configuration, it is possible to stack the short fibers of each strip web in an intersecting state while omitting the second strip web (third belt conveyor).
It should be noted that the layering or insertion work of other belt-like webs can be performed at or before each step before the entanglement step.

(9) In the present embodiment, the configuration in which the first belt-like web 10 and the second belt-like web 12 are each folded into four layers has been described. The first belt-like web 10 and the second belt-like web 12 are each folded into 2n layers (n is a positive integer) by adjusting the reciprocating speed of the cross wrapper 36 with respect to the conveying speed of the first belt conveyor 38a. Can be configured. And typically, the 1st strip | belt-shaped web 10 (2nd strip | belt-shaped web 12) is folded in about 2-12 layers, and it is set as the desired amount of fabric weights. The number of folds of the first belt-like web 10 and the second belt-like web 12 may be the same or different.

It is a longitudinal cross-sectional view of the fiber laminated body for vehicles. (A) And (b) is a figure which shows the manufacturing process of the fiber laminated body for vehicles. (A)-(c) is an upper front view which shows the manufacturing process of a laminated web (back base fabric) sequentially. (A) is a perspective view of the fiber laminated body for vehicles which concerns on a present Example, (b) is a perspective view of the fiber laminated body for vehicles which concerns on a prior art example. It is a longitudinal cross-sectional view of the fiber laminated body which shows the measuring method of a burning rate. (A) is an upper front view of a 1st strip | belt-shaped web, (b) is a partial longitudinal cross-sectional view of (a).

Explanation of symbols

2 Fiber laminate 4 Skin material 6 Cushion material 8 Back base fabric 10 First belt web 12 Second belt web 14 Laminated web 30 Cotton spreader 32 Second belt conveyor 33 Third belt conveyor 34 Card roller 36 Cross wrapper 38 First Belt conveyor 40 Water punch 44 Roller

Claims (3)

In a fiber laminate for a vehicle in which a skin material, a cushion material and a back base fabric are laminated,
A vehicular fiber laminate, wherein the back base fabric is obtained by laminating a plurality of short fibers in a cross shape, and then tangling the short fibers three-dimensionally. It is a manufacturing method of the textiles layered product for vehicles according to claim 1,
An arrangement step of cross-arranging the first belt-shaped web composed of a plurality of carded short fibers in a zigzag manner on the belt conveyor along the conveying direction of the belt conveyor;
A second belt-like web composed of a plurality of short fibers carded is folded in a zigzag shape on a belt conveyor, and is arranged so as to cross along the conveying direction of the belt conveyor, so that the first belt-like web and the second belt-like web A lamination step of forming a laminated web formed by laminating webs;
The entanglement process in which the short fibers of the laminated web are physically or mechanically entangled three-dimensionally to form the backing base fabric,
The manufacturing method of a fiber laminated body provided with the joining process which laminates | stacks the said skin material, the said cushion material, and the said back base fabric in this order, and is made into a fiber laminated body. It is a manufacturing method of the textiles layered product for vehicles according to claim 1,
An arrangement step of cross-arranging along the conveying direction of the belt conveyor while folding the first belt-shaped web composed of a plurality of short fibers carded on the belt conveyor in a zigzag manner while folding in four layers;
Entanglement process in which the short fibers of each layer of the first belt-like web are entangled physically or mechanically in three dimensions to form the backing base fabric,
The manufacturing method of a fiber laminated body provided with the joining process which laminates | stacks the said skin material, the said cushion material, and the said back base fabric in this order, and is made into a fiber laminated body.

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