JPH0820291A - Interior base material for automobile - Google Patents
Interior base material for automobileInfo
- Publication number
- JPH0820291A JPH0820291A JP6179515A JP17951594A JPH0820291A JP H0820291 A JPH0820291 A JP H0820291A JP 6179515 A JP6179515 A JP 6179515A JP 17951594 A JP17951594 A JP 17951594A JP H0820291 A JPH0820291 A JP H0820291A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- base material
- thermoplastic resin
- melting point
- mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Laminated Bodies (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は自動車の室内内装基材
に関し、特に加熱してプレス成形するのに適したものに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle interior / interior substrate, and more particularly to a substrate suitable for heating and press molding.
【０００２】[0002]
【従来の技術】従来、自動車にはヘッドライナー、ドア
トリム等各種の内装材を敷設して装飾している。これら
内装材の多くは、敷設場所に合った形状に基材を成形し
た上で加飾のため室内に面する側に表皮材を貼着してな
るものである。基材の成形は基材を加熱してのプレス成
形によるものが多い。このような加熱成形のためこの種
の内装用基材は熱可塑性樹脂を主体として構成し、基材
を加熱することによって熱可塑性樹脂を軟化させ可塑性
を発現させた上で冷型でプレス成形して形状を固定する
ものである。上記のような熱可塑性樹脂を主体とした基
材はタクトが短く生産性が高いため、従来より多く用い
られてきた。一方、熱可塑性樹脂を主体とした基材では
寸法安定性を確保する方法が技術的課題となってきた。
自動車室内の温度は真夏の炎天下では８０℃以上にもな
るので、たいがいの熱可塑性樹脂のガラス転移点をこえ
て基材が加熱され、成形時に基材内に凍結されたひずみ
が開放されて形状がだれたり、寸法が変化する不都合が
あった。これを解決しようとして、熱の影響の少ないガ
ラス繊維を補強材として組合せ、ガラス繊維強化熱可塑
性樹脂シートの形態で提供されるものもある。たとえば
特開平５−２７１４３３号に示されるようなポリプロピ
レン樹脂と不連続のガラス短繊維を分散混合させ、湿式
抄造してなるガラス繊維強化熱可塑性樹脂シートを用い
たものである。しかしながら、従来の基材は、ガラス繊
維を最も効率良く配したものではなかったため、不必要
に重量が増加する傾向があり、ガラスの分散バラツキも
大きいものであった。またガラス繊維を基材に組み合わ
せるのに別工程を要し、非効率的なものでもあった。2. Description of the Related Art Conventionally, various interior materials such as headliners and door trims have been laid and decorated in automobiles. Many of these interior materials are formed by molding a base material into a shape suitable for the installation site and then attaching a skin material to the side facing the room for decoration. The molding of the base material is often performed by press molding by heating the base material. For such heat molding, this type of interior base material is mainly composed of a thermoplastic resin, and the base material is heated to soften the thermoplastic resin to develop plasticity and then press-molded in a cold mold. To fix the shape. Since the base material mainly composed of the thermoplastic resin as described above has a short tact and high productivity, it has been used more frequently than before. On the other hand, in a base material mainly composed of a thermoplastic resin, a method for ensuring dimensional stability has become a technical issue.
The temperature inside a car can reach 80 ° C or higher in hot summer in midsummer, so the base material is heated above the glass transition point of most thermoplastic resins, and the frozen strain in the base material is released during molding. There was the inconvenience of the sagging and the change in size. In order to solve this, there is also a glass fiber reinforced thermoplastic resin sheet provided by combining glass fibers, which are less affected by heat, as a reinforcing material. For example, a glass fiber-reinforced thermoplastic resin sheet obtained by wet mixing a polypropylene resin and discontinuous short glass fibers as shown in JP-A-5-271433 is dispersed and mixed. However, since the conventional base material is not the one in which the glass fibers are arranged most efficiently, the weight tends to increase unnecessarily, and the dispersion variation of the glass is large. Moreover, another step is required to combine the glass fiber with the base material, which is inefficient.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上記課題を解
決しようとするものであって、熱可塑性樹脂をガラス繊
維で補強した自動車用内装基材において、ガラス繊維を
効率的かつ均一に配することによって、重量の低減をは
かり、またガラス繊維の基材への付与が容易になされる
構成を提供する。DISCLOSURE OF THE INVENTION The present invention is intended to solve the above problems, and in an automobile interior base material in which a thermoplastic resin is reinforced with glass fibers, the glass fibers are efficiently and uniformly arranged. As a result, it is possible to reduce the weight and provide a structure in which the glass fiber can be easily applied to the substrate.
【課題を解決するための手段】課題を解決するための本
発明の手段は、高い融点をもつ第１繊維と第１繊維より
十分低い融点をもつ第２繊維を混合してなる混繊ウェブ
の少なくとも一側に一定方向に配列した多数の細いガラ
ス長繊維を少なくとも第２繊維より高い融点をもつ熱可
塑性樹脂で結合してなる配向シートを積層した自動車用
内装基材による。Means for Solving the Problems The means of the present invention for solving the problems is a mixed fiber web formed by mixing a first fiber having a high melting point and a second fiber having a melting point sufficiently lower than the first fiber. An automotive interior base material in which an oriented sheet is formed by laminating a large number of long glass filaments arranged in a certain direction on at least one side with a thermoplastic resin having a melting point higher than that of at least a second fiber.
【０００４】[0004]
【作用】本発明では自動車用内装基材において、耐熱性
を確保するための補強材として、あらかじめ一定方向に
配列した多数の細いガラス長繊維を熱可塑性樹脂で結合
してなる配向シートをもちいるから、ガラス繊維の分散
バラツキがおこることがない。しかもガラス繊維の配列
方向を基材の最も寸法安定性の必要な方向に合わせて配
することにより、最高の効率で付与することができる。
逆に基材の成形時に基材が大きな延伸を受ける方向には
ガラス繊維の配列方向が重ならないようにすれば、成形
性に支障をきたすこともない。配向シートを混繊ウェブ
に重ねて配向シートの熱可塑性樹脂が軟化して可塑性を
発現する温度まで加熱すると、このとき混繊ウェブ中の
配向シートの熱可塑性樹脂より融点の低い第２繊維は溶
融状態になる。これらを一体的にプレス成形すると、配
向シートは熱可塑性樹脂によって混繊ウェブと一体化さ
れ、同時に混繊ウェブ中の第１繊維が第２繊維で結合さ
れる形で混繊ウェブが成形される。In the present invention, in the automobile interior base material, as a reinforcing material for ensuring heat resistance, an oriented sheet formed by bonding a large number of long glass filaments arranged in a predetermined direction in advance with a thermoplastic resin is used. Therefore, dispersion of glass fiber does not occur. In addition, by arranging the glass fibers so that they are aligned in the direction in which the most dimensional stability of the substrate is required, the glass fibers can be provided with the highest efficiency.
On the contrary, if the glass fibers are arranged so that the glass fibers do not overlap in the direction in which the base material undergoes a large stretching during the molding of the base material, the moldability will not be affected. When the oriented sheet is superposed on the mixed fiber web and heated to a temperature at which the thermoplastic resin of the oriented sheet softens and develops plasticity, the second fiber having a lower melting point than the thermoplastic resin of the oriented sheet in the mixed fiber melts at this time. It becomes a state. When these are integrally press-molded, the oriented sheet is integrated with the mixed fiber web by the thermoplastic resin, and at the same time, the first fiber in the mixed fiber web is bonded with the second fiber to form the mixed fiber web. .
【０００５】[0005]
【実施例】以下、図面をもとに本発明の好適な実施例を
説明する。図１は本発明の基材１２に表皮材１１を重ね
成形してなる内装材１０の一部切り欠いた外観斜視図で
あり、図２は図１のＡ−Ａ’線断面図である。本発明の
基材１２は２種以上の繊維を混合してなる混繊ウェブ１
２ａの少なくとも一側に一定方向に配列したガラス長繊
維を熱可塑性樹脂で結合した配向シートを積層してなる
が、図では混繊ウェブの両側に相互にガラス繊維の配列
方向が異なる形態で２枚の配向シート１２ｂ、１２ｂ’
を配した例を示している。混繊ウェブ１２ａは少なくと
も第１、第２の２種の繊維を混合してなり、第１繊維と
第２繊維では第１繊維の融点が十分に高いものである。
ここで十分に高いという意味は好ましくは３０℃以上と
いう意味であり、より好ましくは５０℃以上の融点差を
有することにある。このような組み合わせのため、第１
繊維と第２繊維としては以下のようなものが好ましい。
第１繊維は融点２００℃以上の熱可塑性繊維あるいは天
然繊維が好ましく、綿、ポリエステル、レーヨン、ジュ
ート、ナイロンなどが好ましい。第２繊維としては、配
向シートの熱可塑性樹脂と接着相性の良いものが好まし
いが、特にポリプロピレン系のものが好ましい。好まし
い組合せの１例は、第１繊維がポリエステル繊維（融点
２６４℃）と綿の再生繊維であり、第２繊維がポリプロ
ピレン繊維であって、目付量は、３５０ｇ／ｍ2 であ
る。第１繊維と第２繊維の混合比率としては、９０：１
０〜１０：９０が可能であるが、８０：２０〜２５：７
５が特に好ましい。配向シート１２ｂ、１２ｂ’は直径
１０〜２０マイクロメーターのガラス繊維を一方向にな
らべ、ポリプロピレン樹脂などで結合したものである。
この配向シートの厚さは１２０マイクロメーター程度、
目付量は８０〜３５０ｇ／ｍ2 程度のものが好ましい。
この基材を用いて、自動車内装材を得るには、混繊ウェ
ブの両側（もしくは一側）に配向シートを重ね付与す
る。このとき、配向シートの基材に対する付与方向は、
内装材として寸法安定性の必要な方向（主に長手方向）
には少なくともガラス繊維の長手方向がくるように１枚
配して、これとは異なる方向に他の配向シートを配する
ことが好ましい。特に最大の絞り成形を受ける部位１３
でガラス繊維が破断しないように配する必要がある。次
にこれらを混繊ウェブ中の第２繊維が十分に軟化する温
度まで加熱する。たとえば、第２繊維としてポリプロピ
レン繊維を用いる場合は、１４０〜１９０℃程度であ
る。このとき、配向シートの熱可塑性樹脂、たとえばポ
リプロピレン樹脂も軟化して可塑状態にあり、一方、第
１繊維たとえばポリエステル繊維はもとの状態を保って
いるので、これらを雌雄型間に配してプレス成形、冷却
することで形状を基材に形状を付与しつつ、同時に配向
シートと混繊ウェブの一体化もおこなわれる。さらに好
ましくは、この基材の成形時に表皮材１１を同時に型間
に配して、貼着することができる。この場合、表皮材の
貼着は、配向シートの熱可塑性樹脂の可塑性を利用し
て、なんら接着剤も用いずにできる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway external perspective view of an interior material 10 formed by superposing a skin material 11 on a base material 12 of the present invention, and FIG. 2 is a sectional view taken along the line AA ′ of FIG. The base material 12 of the present invention is a mixed fiber web 1 formed by mixing two or more kinds of fibers.
2a is formed by laminating oriented sheets in which long glass fibers arranged in a fixed direction are bonded with a thermoplastic resin on at least one side of 2a, but in the figure, the arrangement directions of the glass fibers are different from each other on both sides of the mixed fiber web. Oriented sheets 12b, 12b '
An example of arranging is shown. The mixed fiber web 12a is formed by mixing at least two types of fibers, first and second, and the melting point of the first fiber is sufficiently high between the first fiber and the second fiber.
Here, the meaning of being sufficiently high means preferably 30 ° C. or higher, and more preferably having a melting point difference of 50 ° C. or higher. Because of this combination,
The following are preferable as the fibers and the second fibers.
The first fiber is preferably a thermoplastic fiber having a melting point of 200 ° C. or higher or a natural fiber, and preferably cotton, polyester, rayon, jute, nylon or the like. As the second fiber, those having a good adhesive compatibility with the thermoplastic resin of the oriented sheet are preferable, and polypropylene type is particularly preferable. One example of a preferable combination is that the first fiber is a recycled fiber of polyester fiber (melting point 264 ° C.) and cotton, the second fiber is a polypropylene fiber, and the basis weight is 350 g / m 2 . The mixing ratio of the first fiber and the second fiber is 90: 1.
0 to 10:90 is possible, but 80:20 to 25: 7
5 is particularly preferred. The orientation sheets 12b and 12b 'are formed by arranging glass fibers having a diameter of 10 to 20 micrometers in one direction and bonding them with a polypropylene resin or the like.
The thickness of this orientation sheet is about 120 micrometers,
The basis weight is preferably about 80 to 350 g / m 2 .
In order to obtain an automobile interior material using this substrate, an orientation sheet is superposed on both sides (or one side) of the mixed fiber web. At this time, the direction of application of the orientation sheet to the substrate is
Direction that requires dimensional stability as an interior material (mainly in the longitudinal direction)
It is preferable to arrange at least one glass fiber so that the longitudinal direction of the glass fiber is in the other direction, and arrange another orientation sheet in a direction different from this. Part 13 that receives the largest drawing
It is necessary to arrange so that the glass fibers do not break. Next, they are heated to a temperature at which the second fibers in the mixed fiber web are sufficiently softened. For example, when polypropylene fiber is used as the second fiber, the temperature is about 140 to 190 ° C. At this time, the thermoplastic resin of the oriented sheet, for example, polypropylene resin, is also in a softened and plastic state, while the first fiber, for example, polyester fiber, maintains its original state, so that these are placed between the male and female molds. The orientation sheet and the mixed fiber web are simultaneously integrated while imparting a shape to the substrate by press molding and cooling. More preferably, at the time of molding this base material, the skin material 11 can be simultaneously placed between the molds and adhered. In this case, the skin material can be attached by utilizing the plasticity of the thermoplastic resin of the orientation sheet without using any adhesive.
【０００６】[0006]
【発明の効果】本発明によれば、最高の効率で均一にガ
ラス繊維補強された熱可塑性のプレス成形用基材が得ら
れる。ガラス繊維の配向方向を基材の寸法安定性の必要
な方向に合わせて最適の効率で配することができ、重量
の低減がはかれる。特に寸法安定性の必要な方向が複数
あるときは、対応する各方向にガラス繊維が配列するよ
うに複数の配向シートの形態で付与できる。基材にガラ
ス繊維を積層するのと同時に成形することができ、さら
に同時に表皮材をも貼着することができて、工程数を低
減できる。EFFECTS OF THE INVENTION According to the present invention, it is possible to obtain a thermoplastic press-forming substrate uniformly reinforced with glass fibers at the highest efficiency. The orientation direction of the glass fibers can be aligned with the direction required for the dimensional stability of the substrate so as to be arranged with optimum efficiency, and the weight can be reduced. In particular, when there are a plurality of directions in which dimensional stability is required, the glass fibers can be provided in the form of a plurality of oriented sheets so that the glass fibers are arranged in each corresponding direction. The glass fiber can be laminated at the same time as the glass fiber is laminated on the base material, and at the same time, the skin material can be attached, so that the number of steps can be reduced.
【図１】 自動車用内装材[Figure 1] Interior materials for automobiles
【図２】 図１の断面図FIG. 2 is a sectional view of FIG.
１０・・・内装材 １１・・・表皮材 １２・・・基材 １２a ・・混繊ウェブ １２b,１２b'・・配向シート １３・・・絞り成形部 10 ... Interior material 11 ... Skin material 12 ... Base material 12a ... Mixed fiber web 12b, 12b '... Oriented sheet 13 ... Drawing part
Claims (1)
十分低い融点をもつ第２繊維を混合してなる混繊ウェブ
の少なくとも一側に一定方向に配列した多数の細いガラ
ス長繊維を少なくとも第２繊維より高い融点をもつ熱可
塑性樹脂で結合してなる配向シートを積層したことを特
徴とする自動車用内装基材。1. A large number of long glass filaments arranged in a certain direction on at least one side of a mixed fiber web formed by mixing a first fiber having a high melting point and a second fiber having a melting point sufficiently lower than the first fiber. An automobile interior base material, characterized in that an oriented sheet formed by bonding a thermoplastic resin having a melting point higher than that of at least a second fiber is laminated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6179515A JPH0820291A (en) | 1994-07-08 | 1994-07-08 | Interior base material for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6179515A JPH0820291A (en) | 1994-07-08 | 1994-07-08 | Interior base material for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0820291A true JPH0820291A (en) | 1996-01-23 |
Family
ID=16067144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6179515A Pending JPH0820291A (en) | 1994-07-08 | 1994-07-08 | Interior base material for automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0820291A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998042904A1 (en) * | 1997-03-21 | 1998-10-01 | Ppg Industries Ohio, Inc. | Glass fiber strand mats, thermoplastic composites reinforced with the same and methods for making the same |
| KR100361262B1 (en) * | 2000-06-22 | 2002-11-18 | 삼우기업 주식회사 | Pad for automobile engine hood |
| KR100367350B1 (en) * | 1999-11-16 | 2003-01-08 | 동광기연 주식회사 | fabricating method for interior sheet for car |
| WO2003057453A1 (en) * | 2002-01-11 | 2003-07-17 | Quadrant Plastic Composites Ag | Fiber-reinforced thermoplastic composite material |
| KR100450531B1 (en) * | 2002-06-03 | 2004-09-30 | 에스케이케미칼주식회사 | Matrix of Engine Hood for automobile and preparation thereof |
| JP2016104920A (en) * | 2014-09-30 | 2016-06-09 | ザ・ボーイング・カンパニーＴｈｅ Ｂｏｅｉｎｇ Ｃｏｍｐａｎｙ | Filament network for composite structure |
-
1994
- 1994-07-08 JP JP6179515A patent/JPH0820291A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998042904A1 (en) * | 1997-03-21 | 1998-10-01 | Ppg Industries Ohio, Inc. | Glass fiber strand mats, thermoplastic composites reinforced with the same and methods for making the same |
| US5872067A (en) * | 1997-03-21 | 1999-02-16 | Ppg Industries, Inc. | Glass fiber strand mats, thermoplastic composites reinforced with the same and methods for making the same |
| KR100367350B1 (en) * | 1999-11-16 | 2003-01-08 | 동광기연 주식회사 | fabricating method for interior sheet for car |
| KR100361262B1 (en) * | 2000-06-22 | 2002-11-18 | 삼우기업 주식회사 | Pad for automobile engine hood |
| WO2003057453A1 (en) * | 2002-01-11 | 2003-07-17 | Quadrant Plastic Composites Ag | Fiber-reinforced thermoplastic composite material |
| KR100450531B1 (en) * | 2002-06-03 | 2004-09-30 | 에스케이케미칼주식회사 | Matrix of Engine Hood for automobile and preparation thereof |
| JP2016104920A (en) * | 2014-09-30 | 2016-06-09 | ザ・ボーイング・カンパニーＴｈｅ Ｂｏｅｉｎｇ Ｃｏｍｐａｎｙ | Filament network for composite structure |
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