JPH09155862A - Fiber reinforced thermoplastic resin sheet - Google Patents
Fiber reinforced thermoplastic resin sheetInfo
- Publication number
- JPH09155862A JPH09155862A JP33817395A JP33817395A JPH09155862A JP H09155862 A JPH09155862 A JP H09155862A JP 33817395 A JP33817395 A JP 33817395A JP 33817395 A JP33817395 A JP 33817395A JP H09155862 A JPH09155862 A JP H09155862A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- thermoplastic resin
- resin sheet
- reinforced thermoplastic
- reinforcing fibers
- 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.)
- Granted
Links
Landscapes
- Reinforced Plastic Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は繊維強化熱可塑性樹
脂シ−トにおける強化繊維の重量含有率が高く、樹脂シ
−ト内の強化繊維の分散性が良好で、強化繊維同志が交
絡せず、シ−トの面内に強化繊維が均一に分散されてい
るため、すべての方向に対して強度、弾性率が均等であ
り、靭性に優れ、後加工時の強化繊維の流動性の良好な
繊維強化熱可塑性樹脂シ−トに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a high weight content of reinforcing fibers in a fiber reinforced thermoplastic resin sheet, has good dispersibility of the reinforcing fibers in the resin sheet, and does not entangle the reinforcing fibers with each other. Since the reinforcing fibers are evenly dispersed in the plane of the sheet, the strength and elastic modulus are uniform in all directions, the toughness is excellent, and the fluidity of the reinforcing fibers during post-processing is good. The present invention relates to a fiber-reinforced thermoplastic resin sheet.
【０００２】[0002]
【従来の技術】従来、熱可塑性樹脂をマトリックスとし
てガラス繊維を強化繊維とした繊維強化熱可塑性樹脂シ
−トには強化繊維の形態及びその配向性の面から次のよ
うなものが存在する。 (1) 強化繊維として連続繊維を使用し、繊維が任意の配
向性を持つものとして、一方向強化熱可塑性樹脂プリプ
レグシ−トを同一方向に又は強化繊維が直交又は斜交す
る方向に積層された繊維強化熱可塑性樹脂シ−トがあ
る。このような樹脂シ−トは繊維の体積含有率を高くす
ることができる利点があり、繊維軸方向では弾性率、強
度に優れた特性を有する。またシェル構造物への適用が
可能である。 (2) 強化繊維として連続繊維を使用し、これを織物など
の強化形態として使用したものも強化繊維の体積含有率
を高くすることが可能であり、(1) に記載した強化繊維
の直交積層品と同様に繊維軸方向では弾性率、強度にお
いて優れている。 (3) 強化繊維として連続繊維を使用する場合、一般にス
ワ−ルマットと称されている強化繊維を不織布状にした
ものがある。これは、上記(1),(2) の場合のように面内
異方性を有しない特徴を持っているが、この場合強化繊
維の繊維体積含有率がその製造方法に起因して高くする
ことができず、そのため弾性率や強度に限界がある。こ
のような不織布の強化形態を持つものはスタンピング成
形に供されることが主である。 (4) 強化繊維として非連続繊維を使用するものとしては
チョップドストランドマットを使用するものがある。こ
れは、例えば２５mmから５０mm程度の繊維長を持つスト
ランド（繊維束）が強化材として使用される。この場
合、成形時の流動性、例えばスタンピング成形時の流動
性が良好であり、シェル構造物のみならず複雑な形状へ
の適用も容易である。2. Description of the Related Art Heretofore, there have been the following fiber-reinforced thermoplastic resin sheets in which a thermoplastic resin is used as a matrix and glass fibers are used as reinforcing fibers, in view of the form and orientation of the reinforcing fibers. (1) A continuous fiber is used as the reinforcing fiber, and the fiber has an arbitrary orientation, and the unidirectionally reinforced thermoplastic resin prepreg sheet is laminated in the same direction or in a direction in which the reinforcing fibers are orthogonal or oblique to each other. There are fiber reinforced thermoplastic resin sheets. Such a resin sheet has an advantage that the volume content of the fiber can be increased, and has an excellent elastic modulus and strength in the fiber axis direction. Further, application to a shell structure is possible. (2) It is possible to use continuous fibers as the reinforcing fibers and use the continuous fibers as reinforcing forms such as woven fabrics to increase the volume content of the reinforcing fibers, and the orthogonal lamination of the reinforcing fibers described in (1). Like the product, it has excellent elastic modulus and strength in the fiber axis direction. (3) When continuous fibers are used as the reinforcing fibers, there is a non-woven fabric in which reinforcing fibers generally called swirl mats are used. This has the characteristic that it does not have in-plane anisotropy as in the cases of (1) and (2) above, but in this case the fiber volume content of the reinforcing fiber is increased due to its manufacturing method. Therefore, there is a limit in elastic modulus and strength. The nonwoven fabric having such a reinforced form is mainly subjected to stamping molding. (4) A chopped strand mat is used as a reinforcing fiber that uses a discontinuous fiber. For this, for example, a strand (fiber bundle) having a fiber length of about 25 mm to 50 mm is used as a reinforcing material. In this case, the fluidity at the time of molding, for example, the fluidity at the time of stamping molding is good, and it is easy to apply not only to the shell structure but also to a complicated shape.
【０００３】近年、従来の射出成形に代るものとして長
繊維ペレットを用いた成形品も開発されている。これに
は従来の射出成形品に使用される強化繊維の平均繊維長
が数百ミクロン程度であったのに対して数mmから十数mm
の平均繊維長を有するものも開発された。長繊維ペレッ
トを使用した場合、シェル構造物のみならず、複雑な形
状への適用も非常に容易であり、生産性に優れている利
点がある。また繊維の配向に関しても金型への樹脂の注
入の最適化などにより異方性を最小限にする努力が成さ
れている。しかしながら成形時に、強化繊維を樹脂によ
り流動化させる機構が必須であるため、強化繊維の体積
含有率を高くすることができない。強化繊維の体積含有
率が低いこと及び前記の他の繊維強化熱可塑性樹脂シ−
トと比較して、強化繊維の長さが短いために弾性率、強
度などの物性はスタンパブルシ−ト（スタンピング成形
に供する繊維強化樹脂シ−ト）と従来の射出成形品の中
間程度の大きさである。In recent years, molded products using long fiber pellets have been developed as an alternative to conventional injection molding. The average fiber length of the reinforcing fibers used in conventional injection-molded products was several hundreds of microns, whereas it is several mm to ten and several mm.
Those with an average fiber length of When long-fiber pellets are used, not only the shell structure but also a complex shape can be applied very easily, and there is an advantage that the productivity is excellent. With respect to fiber orientation, efforts have been made to minimize anisotropy by optimizing the injection of resin into the mold. However, since a mechanism for fluidizing the reinforcing fibers with the resin is essential at the time of molding, the volume content of the reinforcing fibers cannot be increased. Low volume content of reinforcing fiber and the other fiber-reinforced thermoplastic resin sheet described above.
Since the length of the reinforced fiber is shorter than that of the molded product, the physical properties such as elastic modulus and strength are intermediate between those of stampable sheet (fiber reinforced resin sheet used for stamping molding) and conventional injection molded products. Is.
【０００４】[0004]
【発明が解決しようとする課題】従来の繊維強化熱可塑
性樹脂シ−トとして、前記(1) の場合は、例えば曲面を
有する構造物の賦形性に関しては、繊維を拘束する要因
がないため繊維の配向に乱れを生じやすく、強度のバラ
ツキが生じやすい欠点がある。上記(2) の場合は、成形
を最適条件で行わないとよれやしわなどが生じたり、強
化繊維の配向が所望する角度をなさず、最弱断面を生ず
る恐れがある。また上記(3) の場合は、連続繊維が交絡
しているため、強化繊維の流動性が不足して成形品に体
積含有率の分布が生じやすい欠点がある。更に上記(4)
の場合、チョップドストランドマットを強化材として使
用したものは、面内異方性を有しないが、体積含有率を
高くできない欠点があり、弾性率、強度に限界がある。As the conventional fiber-reinforced thermoplastic resin sheet, in the case of the above (1), there is no factor for restraining the fibers in regard to the shapeability of a structure having a curved surface, for example. Disadvantages in the orientation of the fibers are likely to occur, and variations in strength are likely to occur. In the case of the above (2), if the molding is not performed under the optimum conditions, wrinkles, wrinkles, etc. may occur, or the orientation of the reinforcing fibers may not form the desired angle, and the weakest cross section may occur. Further, in the case of the above (3), since the continuous fibers are entangled with each other, the fluidity of the reinforcing fibers is insufficient, and there is a drawback that the distribution of the volume content is likely to occur in the molded product. Further above (4)
In the case of (1), the one using the chopped strand mat as the reinforcing material does not have in-plane anisotropy, but has the drawback that the volume content cannot be increased, and the elastic modulus and strength are limited.
【０００５】本発明は上記従来の繊維強化熱可塑性樹脂
シ−トの種々な欠点に鑑み、強化繊維の重量含有率が高
く、強化繊維の分散性が良好で、シ−トの面内に繊維が
ランダムに分散されているため、強度、弾性率が面内疑
似等方性であり、靭性に優れ、かつ後加工時の強化繊維
の流動性も良好な繊維強化熱可塑性樹脂シ−トを提供す
ることを目的とするものである。In view of various drawbacks of the above conventional fiber-reinforced thermoplastic resin sheet, the present invention has a high weight content of the reinforcing fiber, a good dispersibility of the reinforcing fiber, and a fiber in the plane of the sheet. Provides a fiber-reinforced thermoplastic resin sheet with in-plane pseudo-isotropic strength and elastic modulus, excellent toughness, and good flowability of reinforcing fibers during post-processing, since they are randomly dispersed. The purpose is to do.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに本発明の第１は、熱可塑性樹脂と強化繊維とを主成
分とし、強化繊維の重量含有率、５０％から８５％、熱
可塑性樹脂の重量含有率、１５％から５０％、強化繊維
の平均繊維長、５mmから５０mmであり、強化繊維が実質
的に無方向に分散されたランダム強化タイプであること
を特徴とする繊維強化熱可塑性樹脂シ−トである。その
第２は、ＪＩＳ Ｋ ７０５２に準じて得られた強化繊
維の重量含有率（Ｗｆ）に対して、任意の場所から切り
出した１０／（１００−Ｗｆ）ｇの繊維強化熱可塑性樹
脂シ−トの小片中に含まれる強化繊維の重量含有率（Ｚ
ｆ）が次式で表される範囲にあることを特徴とする、上
記第１発明記載の繊維強化熱可塑性樹脂シ−トである。 （Ｗｆ−２）＜Ｚｆ＜（Ｗｆ＋２） 但し、Ｗｆ：２ｇ以上のサンプルから得られた強化繊維
の重量含有率（％） Ｚｆ：１０／（１００−Ｗｆ）ｇのサンプルから得られ
た強化繊維の重量含有率（％） その第３は、繊維強化熱可塑性樹脂シ−トをＪＩＳ Ｋ
７０５２に示される温度条件（６２５℃）で炭素質が
実質的に無くなるまで加熱した後の残渣が次式を満足す
ることを特徴とする、第１又は第２発明の繊維強化熱可
塑性樹脂シ−トである。 ０．９５＜（ｔ２／ｔ１）＜１．１０ 但し、ｔ１：長繊維強化熱可塑性樹脂シ−トの厚み（m
m) ｔ２：残渣の厚み（mm) その第４は、繊維強化熱可塑性樹脂シ−トをＪＩＳ Ｋ
７０５２に示される温度条件（６２５℃）で炭素質が
実質的に無くなるまで加熱した後の残渣中に含まれる強
化繊維が実質的に交絡していないことを特徴とする上記
第１、第２又は第３発明記載の繊維強化熱可塑性樹脂シ
−トである。更にその第５は、強化繊維がガラス繊維で
あり、熱可塑性樹脂がポリエステル系樹脂、ポリオィフ
イン系樹脂及び／又はポリアミド系樹脂である上記第
１、第２、第３又は第４発明記載の繊維強化熱可塑性樹
脂シ−トである。In order to achieve the above-mentioned object, the first object of the present invention is to use a thermoplastic resin and a reinforcing fiber as main components, and the weight content of the reinforcing fiber is from 50% to 85%. Fiber reinforcement characterized by having a plastic resin weight content of 15% to 50%, an average fiber length of reinforcing fibers of 5 mm to 50 mm, and being a random reinforcing type in which reinforcing fibers are dispersed substantially non-directionally. It is a thermoplastic resin sheet. Secondly, with respect to the weight content (Wf) of the reinforcing fiber obtained according to JIS K 7052, 10 / (100-Wf) g of the fiber-reinforced thermoplastic resin sheet cut out from any place. Weight content of reinforcing fiber contained in the small pieces (Z
f) is in the range represented by the following formula, which is the fiber-reinforced thermoplastic resin sheet according to the above-mentioned first invention. (Wf-2) <Zf <(Wf + 2) However, Wf: Reinforcement fiber obtained from the sample of 2g or more, and the weight content rate (%) of Zf: 10 / (100-Wf) g. The weight content (%) of the third is the fiber reinforced thermoplastic resin sheet according to JIS K
The fiber-reinforced thermoplastic resin sheet of the first or second invention, characterized in that the residue after heating under the temperature condition (625 ° C.) shown in 7052 until the carbonaceous substance is substantially eliminated satisfies the following formula. It is 0.95 <(t2 / t1) <1.10 However, t1: Thickness of long fiber reinforced thermoplastic resin sheet (m
m) t2: Thickness of residue (mm) The fourth is the fiber reinforced thermoplastic resin sheet according to JIS K.
7052, wherein the reinforcing fibers contained in the residue after heating until the carbonaceous substance is substantially eliminated under the temperature condition (625 ° C.) shown in 7052 are not substantially entangled. It is a fiber-reinforced thermoplastic resin sheet according to the third invention. Further, the fifth is the fiber reinforced according to the first, second, third or fourth invention, wherein the reinforcing fiber is glass fiber and the thermoplastic resin is polyester resin, polyolefin resin and / or polyamide resin. It is a thermoplastic resin sheet.
【０００７】本発明者等が種々研究した結果、平均繊維
長が５mmから５０mmの強化繊維を使用して強化繊維の重
量含有率が５０％から８５％、熱可塑性樹脂の重量含有
率が１５％から５０％で、かつ強化繊維が実質的に無方
向に分散されたランダム強化タイプの強化繊維を使用し
た場合のみが本発明の目的に合致した弾性率と強度に優
れ、シ−ト面内の異方性が無く、疑似等方性の繊維強化
熱可塑性樹脂シ−トが得られることが判明した。それ以
外の条件ではシ−ト面内の異方性に問題があり、疑似等
方性の繊維強化熱可塑性樹脂シ−トが得られず、弾性率
と強度において劣るものであった。例えば平均繊維長５
mmから５０mmの強化繊維としてガラス繊維を使用して、
強化繊維の重量含有率が８５％を超過し、従って熱可塑
性樹脂の重量含有率が１５％未満の場合は製造された樹
脂シ−トの表面に強化繊維が出現して樹脂シ−トとして
は使用することができない。また同様に強化繊維の重量
含有率が５０％未満であり、樹脂の含有率が５０％を超
過した場合は得られた樹脂シ−トの強度、弾性率が低
く、本発明の目的とするランダム強化タイプの樹脂シ−
トが得られない。As a result of various studies conducted by the present inventors, the reinforcing fiber having an average fiber length of 5 mm to 50 mm was used, and the weight content of the reinforcing fiber was 50% to 85% and the weight content of the thermoplastic resin was 15%. To 50%, and only when the reinforcing fibers of the random reinforcing type in which the reinforcing fibers are dispersed substantially non-directionally are used, the elastic modulus and strength which meet the object of the present invention are excellent, and It has been found that a pseudo-isotropic fiber-reinforced thermoplastic resin sheet having no anisotropy can be obtained. Under other conditions, there was a problem with the in-plane anisotropy of the sheet, a pseudo-isotropic fiber-reinforced thermoplastic resin sheet could not be obtained, and the elastic modulus and strength were poor. For example, average fiber length 5
Using glass fiber as the reinforcing fiber from mm to 50 mm,
When the weight content of the reinforcing fibers exceeds 85%, and therefore the weight content of the thermoplastic resin is less than 15%, the reinforcing fibers appear on the surface of the produced resin sheet and the resin sheet is Cannot be used. Similarly, when the weight content of the reinforcing fibers is less than 50% and the content of the resin exceeds 50%, the strength and elastic modulus of the obtained resin sheet are low, which is the random object of the present invention. Reinforced type resin sheet
I can't get it.
【０００８】本発明に使用の強化繊維としては、炭化珪
素繊維、ガラス繊維などの無機繊維、ボロン繊維などの
金属繊維などがあるが、コストの面、組み合わせる熱可
塑性樹脂との弾性率、強度のバランスの点から、従来Ｆ
ＲＰに使用されているガラス繊維が好適に使用される。The reinforcing fibers used in the present invention include inorganic fibers such as silicon carbide fibers and glass fibers, metal fibers such as boron fibers, and the like. Conventional F from the point of balance
The glass fiber used for RP is preferably used.
【０００９】繊維強化熱可塑性樹脂シ−トが上記のよう
な構成であり、かつＪＩＳ Ｋ ７０５２に準じて得ら
れた強化繊維の重量含有率（Ｗｆ）に対して任意の場所
から切り出した１０／（１００−Ｗｆ）ｇの小片中に含
まれる強化繊維の重量含有率（Ｚｆ）が次式で表される
範囲にあることが好ましい。 （Ｗｆ−２）＜Ｚｆ＜（Ｗｆ＋２） 但し、Ｗｆ：２ｇ以上のサンプルから得られた強化繊維
の重量含有率（％） Ｚｆ：１０／（１００−Ｗｆ）ｇのサンプルから得られ
た強化繊維の重量含有率（％） である。ＪＩＳ Ｋ ７０５２では強化繊維の重量含有
率測定の際には２ｇ以上の試料を用いることが規定され
ている。その理由に関してはＪＩＳ本文もしくは解説中
にも何等記載はないが、２ｇ未満の試料では繊維の重量
含有率にばらつきを生じ、正確な重量含有率が算出でき
ないことを前提としていると考えられる。この点よりし
て本発明においては１０／（１００−Ｗｆ）ｇの上記Ｊ
ＩＳ Ｋ７０５２に規定する量よりもわずかな試料を使
用することによって、この小片中の繊維重量含有率が上
記の式で表される範囲内にあることより、始めて強化繊
維の分布が良好であり、特性値のばらつきが小さい繊維
強化熱可塑性樹脂シ−トを得ることができるのである。
この強化繊維の分散性の良さは過剰な樹脂の溜りや、繊
維が熱可塑性樹脂シ−ト内で繊維束状に遍在することに
よる最弱断面、即ち破壊の起点の存在確率が小さいので
ある。即ち本発明者等の研究結果によって、繊維強化熱
可塑性樹脂シ−トの２ｇ未満の極小範囲における任意の
個所からサンプルを採取して、 Ｗｆ−２＜Ｚｆ＜Ｗｆ＋２ の式を満足することによって、該樹脂シ−ト内における
すべての領域において強化繊維の分散性及び過剰な樹脂
の溜り、強化繊維の偏在が無く、本発明の樹脂シ−トの
破壊を惹き起す起点が無いか又は著しく小さいことが判
明して、本発明の樹脂シ−トの要件の一つとしたのであ
る。なお、この条件を満たすには試料から小片を切り出
す、もしくは削り出す際に強化繊維が熱可塑性樹脂と一
体化していることが必須であり、繊維と樹脂との間の接
着性や濡れ性及び含浸が良好であることが必要なことは
いうまでもない。The fiber reinforced thermoplastic resin sheet has the above-mentioned constitution, and the weight content (Wf) of the reinforcing fiber obtained in accordance with JIS K 7052 is cut out from an arbitrary position 10 /. It is preferable that the weight content (Zf) of the reinforcing fibers contained in the (100-Wf) g piece be in the range represented by the following formula. (Wf-2) <Zf <(Wf + 2) However, Wf: Reinforcement fiber obtained from the sample of 2g or more, and the weight content rate (%) of Zf: 10 / (100-Wf) g. Is the weight content rate (%). JIS K 7052 stipulates that a sample of 2 g or more is used when measuring the weight content of reinforcing fibers. Although there is no description about the reason in the JIS text or commentary, it is considered that it is premised that the weight content of the fiber varies with the sample less than 2 g, and the accurate weight content cannot be calculated. From this point, in the present invention, the above J of 10 / (100-Wf) g
By using less sample than the amount specified in IS K7052, the distribution of reinforcing fibers is good for the first time because the fiber weight content in this piece is within the range represented by the above formula, It is possible to obtain a fiber-reinforced thermoplastic resin sheet with a small variation in characteristic values.
The good dispersibility of this reinforcing fiber is that the existence of excess resin pools and the weakest cross section due to fibers ubiquitously forming a fiber bundle in the thermoplastic resin sheet, that is, the probability of the starting point of breakage being small. . That is, according to the research results of the present inventors, a sample is taken from an arbitrary point in the minimum range of less than 2 g of the fiber-reinforced thermoplastic resin sheet, and by satisfying the formula of Wf-2 <Zf <Wf + 2, Dispersion of reinforcing fibers, excess resin accumulation, uneven distribution of reinforcing fibers in all regions within the resin sheet, and no or extremely small starting point that causes destruction of the resin sheet of the present invention. Was found, which was one of the requirements for the resin sheet of the present invention. In order to meet this condition, it is essential that the reinforcing fiber be integrated with the thermoplastic resin when cutting out or cutting out a small piece from the sample, and the adhesiveness, wettability and impregnation between the fiber and resin are impregnated. Needless to say, it is necessary to be good.
【００１０】更に繊維強化熱可塑性樹脂シ−トがＪＩＳ
Ｋ ７０５２に示される温度条件（６２５℃）で炭素
質が実質的に無くなるまで加熱した残渣が次式を満たす
ことが望ましい。 ０．９５＜（ｔ２／ｔ１）＜１．１０ 但し、ｔ１：加熱前の厚み（mm） ｔ２：残渣の厚み（mm） 加熱前の厚みと残渣の厚みとの比（ｔ２／ｔ１）が大き
い場合、強化繊維の弾性回復によるスプリングバック
（Spring back ）がその原因として上げられる。このよ
うな現象は熱可塑性樹脂に埋め込まれている強化繊維
が、大きな弾性変形によるエネルギ−を蓄積している証
拠であり、このエネルギ−は残留応力として蓄積されて
いる。残留応力は長期使用には徐々に開放されるか、も
しくは熱可塑性樹脂の熱変形温度近辺における使用中に
シ−トの寸法安定性に悪影響を与えることがあり、問題
である。しかしながら繊維強化熱可塑性樹脂シ−トが
０．９５＜（ｔ２／ｔ１）＜１．１０の条件を満足する
強化繊維に大きな弾性エネルギ−が蓄積されていないの
である。（ｔ２／ｔ１）の値が上記以外の場合は強化繊
維に大きな弾性エネルギ−が蓄積されており、熱可塑性
樹脂シ−トの寸法安定性に悪影響があり採用することが
できない。Furthermore, the fiber reinforced thermoplastic resin sheet is JIS
It is desirable that the residue heated under the temperature condition (625 ° C.) indicated by K 7052 until the carbonaceous substance substantially disappears satisfies the following formula. 0.95 <(t2 / t1) <1.10 However, t1: thickness before heating (mm) t2: thickness of residue (mm) Ratio of thickness before heating and thickness of residue (t2 / t1) is large. In this case, spring back caused by elastic recovery of the reinforcing fibers is raised as the cause. Such a phenomenon is evidence that the reinforcing fibers embedded in the thermoplastic resin accumulate energy due to large elastic deformation, and this energy is accumulated as residual stress. Residual stress is a problem because it may be gradually released for long-term use or may adversely affect the dimensional stability of the sheet during use near the heat distortion temperature of the thermoplastic resin. However, a large amount of elastic energy is not accumulated in the reinforced fiber satisfying the condition of 0.95 <(t2 / t1) <1.10 in the fiber-reinforced thermoplastic resin sheet. When the value of (t2 / t1) is other than the above value, a large amount of elastic energy is accumulated in the reinforcing fiber, and the dimensional stability of the thermoplastic resin sheet is adversely affected, so that it cannot be employed.
【００１１】即ち、ｔ２／ｔ１≦０．９５の場合は６２
５℃で樹脂可塑性樹脂成型品シ−ト中の樹脂成分を燃え
つくした場合には残渣の形態がもとの樹脂シ−トの形態
よりも収縮、所謂へこみ（極端にはもとの形態をとどめ
ない）を生ずるし、また、ｔ２／ｔ１≧１．１０の場合
は、同様な処理によって残渣の形態が拡張されて、成型
品シ−トの寸法安定性を害し、本発明の目的を達成する
ことができないのである。しかもｔ２／ｔ１を測定する
ことによって始めて上記の現象が明らかになった。例え
ばガラス繊維が不均一に樹脂シ−トの面内に分散されて
いる場合は、上記のへこみや拡張が生じ、ｔ２／ｔ１≦
０．９５か又はｔ２／ｔ１≧１．１０となることが本発
明者等によって始めて見出されたのである。That is, when t2 / t1 ≦ 0.95, 62
When the resin component in the resin-plastic molded product sheet is burned out at 5 ° C, the form of the residue shrinks more than the original form of the resin sheet, a so-called dent (extremely the original form. In the case of t2 / t1 ≧ 1.10, the morphology of the residue is expanded by the same treatment, impairing the dimensional stability of the molded product sheet, and achieving the object of the present invention. You cannot do it. Moreover, the above phenomenon became apparent only by measuring t2 / t1. For example, when the glass fibers are unevenly dispersed in the surface of the resin sheet, the above-mentioned dents and expansions occur, and t2 / t1≤
It was first discovered by the present inventors that 0.95 or t2 / t1 ≧ 1.10.
【００１２】また、繊維強化熱可塑性樹脂シ−トが上記
の式を満たすもう一つの物理的な意味は、強化繊維がシ
−トの面内に良く分散しているということである。強化
繊維が面内に良く分散されており、面外へ配向する成分
が少ないことは、面内の応力伝達に寄与する強化繊維が
多いことを意味する。このことは繊維強化熱可塑性樹脂
シ−トがシェル構造を有する構造物に用いられる場合に
有利である。シェル構造において、面内、面外の変形を
問わず、面内に分散、配向している繊維が多いことは、
構造体に掛かる外力を速やかに面内に伝達、分散するこ
とが可能であることを示す。Another physical meaning of the fiber-reinforced thermoplastic resin sheet satisfying the above formula is that the reinforcing fibers are well dispersed in the plane of the sheet. The fact that the reinforcing fibers are well dispersed in the plane and there are few components oriented out of the plane means that there are many reinforcing fibers that contribute to the in-plane stress transmission. This is advantageous when the fiber-reinforced thermoplastic resin sheet is used in a structure having a shell structure. In the shell structure, there are many fibers dispersed and oriented in the plane regardless of in-plane and out-of-plane deformation.
It is shown that the external force applied to the structure can be quickly transmitted and dispersed in the plane.
【００１３】次いで、繊維強化熱可塑性樹脂シ−トをＪ
ＩＳ Ｋ ７０５２に示される温度条件（６２５℃）で
炭素質が実質的に無くなるまで加熱した後の残渣中に含
まれる強化繊維が実質的に交絡していないことが本発明
の望ましい要件の一つである。このような特徴を持つ繊
維強化熱可塑性樹脂シ−トは、連続した平面を持つシェ
ル構造において非常に有効である。シェル構造の変形に
よるひずみは、熱可塑性樹脂と熱可塑性樹脂−強化繊維
界面及び強化繊維への伝達を繰り返す。強化繊維が実質
的に交絡していない繊維強化熱可塑性樹脂シ−トは、強
化繊維の高い弾性率及び強度を活かし、しかも熱可塑性
樹脂の持つ延性を十分に発揮することができる。つまり
本発明の強化繊維と熱可塑性樹脂との組み合わされた繊
維強化熱可塑性樹脂シ−トは、その弾性率、強度が発現
されるのみならず、靭性も十分に発揮することができ
る。繊維強化熱可塑性樹脂シ−トにおいて、強化繊維が
実質的に交絡していないことにより、この繊維強化熱可
塑性樹脂シ−トを複雑形状を有する構造物に後成形加工
（例えばスタンピング成形やホットブレス成形）する
際、強化繊維の流動性が良好であり、構造物中での繊維
重量含有率のばらつきを最小限に押さえることができ
る。Next, the fiber-reinforced thermoplastic resin sheet is
It is one of the desirable requirements of the present invention that the reinforcing fibers contained in the residue after being heated under the temperature condition (625 ° C.) shown in IS K 7052 until substantially free of carbonaceous matter are not substantially entangled. Is. The fiber-reinforced thermoplastic resin sheet having such characteristics is very effective in a shell structure having a continuous flat surface. The strain due to the deformation of the shell structure is repeatedly transmitted to the thermoplastic resin and the thermoplastic resin-reinforced fiber interface and the reinforcing fiber. The fiber-reinforced thermoplastic resin sheet in which the reinforcing fibers are not substantially entangled can take advantage of the high elastic modulus and strength of the reinforcing fibers and can sufficiently exhibit the ductility of the thermoplastic resin. That is, the fiber-reinforced thermoplastic resin sheet of the present invention, which is a combination of the reinforcing fiber and the thermoplastic resin, not only exhibits its elastic modulus and strength, but also can sufficiently exhibit its toughness. In the fiber-reinforced thermoplastic resin sheet, since the reinforcing fibers are not substantially entangled with each other, the fiber-reinforced thermoplastic resin sheet is post-formed into a structure having a complicated shape (for example, stamping molding or hot press molding). At the time of molding, the fluidity of the reinforcing fibers is good, and it is possible to minimize variations in the fiber weight content in the structure.
【００１４】本発明の繊維強化熱可塑性樹脂シ−トに用
いられる熱可塑性樹脂としては、ナイロン６、ナイロン
１２、ナイロン６６、ナイロン４６に代表されるポリア
ミド系樹脂、ポリエチレンテレフタレ−トやポリブチレ
ンテレフタレ−トなどのポリエステル系樹脂、ポリエチ
レンやポリプロピレンなどのポリオレフィン系樹脂、ポ
リエ−テルケトン樹脂、ポリフェニレンサルファイド樹
脂、ポリエ−テルイミド樹脂、ポリカ−ボネ−ト樹脂な
どが挙げられるが、特にこれらに限定されるものではな
い。しかしながら耐熱性が要求される分野においては、
熱可塑性樹脂がポリエステル系樹脂であることが好まし
い。特に耐熱性や機械的強度、クリ−プ特性、耐薬品
性、耐油性が要求される分野では、ポリエチレンテレフ
タレ−トがより好ましい。また加水分解防止剤、熱劣化
防止剤等の添加剤を目的に応じて添加することができ
る。The thermoplastic resin used in the fiber-reinforced thermoplastic resin sheet of the present invention includes polyamide resins represented by nylon 6, nylon 12, nylon 66 and nylon 46, polyethylene terephthalate and polybutylene. Specific examples include polyester resins such as terephthalate, polyolefin resins such as polyethylene and polypropylene, polyetheretherketone resins, polyphenylene sulfide resins, polyetherimide resins, polycarbonate resins, and the like, but are not limited to these. Not something. However, in the field where heat resistance is required,
It is preferable that the thermoplastic resin is a polyester resin. In particular, polyethylene terephthalate is more preferable in the fields where heat resistance, mechanical strength, creep characteristics, chemical resistance and oil resistance are required. Further, additives such as a hydrolysis inhibitor and a heat deterioration inhibitor can be added according to the purpose.
【００１５】更にコストや賦形時の流動性、耐水性、耐
熱水性、耐化学薬品性が要求される分野には、熱可塑性
樹脂がポリオレフィン系樹脂であることが好ましい。更
に好ましくは経済的に優れることから、ポリプロピレン
であることが望ましい。ポリプロピレンは、その本来持
つ特性から強化繊維との接着性に乏しいことが欠点とし
て挙げられていたが、近年、酸変性することにより接着
性が改良された。そのため本発明の繊維強化熱可塑性樹
脂シ−トにポリプロピレンを用いる場合は、このような
変性が成されていることが好ましい。Further, it is preferable that the thermoplastic resin is a polyolefin resin in the fields where cost, fluidity at the time of shaping, water resistance, hot water resistance and chemical resistance are required. More preferably, polypropylene is desirable because it is economically superior. Polypropylene has been cited as a drawback due to its inherent property of poor adhesiveness to reinforcing fibers, but in recent years, the adhesiveness has been improved by acid modification. Therefore, when polypropylene is used for the fiber-reinforced thermoplastic resin sheet of the present invention, it is preferable that such modification is performed.
【００１６】そして摩耗性、耐油性、長期耐熱特性が必
要な場合には、熱可塑性樹脂がポリアミド系樹脂である
ことが好ましい。更に好ましくはナイロン６であること
が望ましい。この場合、例えば酸素雰囲気下で、加熱さ
れると酸化劣化を起こすことがあるが、これを防止する
ために酸化劣化防止剤等を目的に応じて添加することが
できる。When abrasion resistance, oil resistance and long-term heat resistance are required, the thermoplastic resin is preferably a polyamide resin. More preferably, nylon 6 is desirable. In this case, for example, when heated under an oxygen atmosphere, oxidative deterioration may occur. To prevent this, an oxidative deterioration inhibitor or the like can be added depending on the purpose.
【００１７】[0017]
【発明の実施の形態】本発明の特徴を有する繊維強化熱
可塑性樹脂シ−トを製造するには、 １．連続ガラス繊維束を引き揃え、これを良く開繊させ
る工程 ２．引き揃え、開繊された連続ガラス繊維束に熱可塑性
樹脂を付与する工程 ３．一体化されたガラス連続繊維強化熱可塑性樹脂を長
手方向に対し、所望の幅及び長さに裁断する工程 ４．裁断された薄片を無配向に、均一に堆積させる工程 ５．堆積した薄片を加熱溶融し、ガラス繊維強化熱可塑
性樹脂シ−トに成形する工程 が必須である。以下にこれらの工程について詳細に説明
する。BEST MODE FOR CARRYING OUT THE INVENTION To produce a fiber-reinforced thermoplastic resin sheet having the features of the present invention, 1. 1. A process of aligning continuous glass fiber bundles and opening them well. 2. A process of applying a thermoplastic resin to the aligned and opened continuous glass fiber bundles. 3. A step of cutting the integrated glass continuous fiber-reinforced thermoplastic resin into a desired width and length in the longitudinal direction. 4. A step of uniformly depositing the cut thin pieces in a non-oriented manner. It is essential to heat and melt the deposited flakes to form a glass fiber reinforced thermoplastic resin sheet. Hereinafter, these steps will be described in detail.
【００１８】第１には、多数本の連続ガラス繊維束を引
き揃え、これらを十分に開繊させる。この場合、引き揃
える連続ガラス繊維の本数は特に限定されるものではな
い。この第１工程において重要なことは、連続ガラスの
繊維が十分に開繊されていることである。これらの開繊
が不十分であると、繊維束と繊維束の間隙が広くなり、
最終的には熱可塑性樹脂の余剰な部分が生じたりするこ
とがある。First, a large number of continuous glass fiber bundles are aligned and sufficiently opened. In this case, the number of continuous glass fibers to be aligned is not particularly limited. What is important in this first step is that the fibers of the continuous glass are sufficiently opened. If these opening are insufficient, the gap between the fiber bundles becomes wide,
Eventually, an excessive portion of the thermoplastic resin may occur.
【００１９】第２には、開繊された繊維に熱可塑性樹脂
を付与する工程である。熱可塑性樹脂の付与方法は直接
溶融した熱可塑性樹脂を含浸する方法、フィルム状の熱
可塑性樹脂を溶融して含浸させる方法、粉体状の熱可塑
性樹脂を溶融して含浸させる方法などがあるが、特にこ
れらに限定されるものではない。連続ガラス繊維に熱可
塑性樹脂を付与する工程において重要なことは、連続ガ
ラス繊維と熱可塑性樹脂とが十分に一体化されているこ
とである。例えば前工程で、繊維の開繊性が不良である
と熱可塑性樹脂の含浸が困難になり、連続ガラス繊維と
熱可塑性樹脂の濡れ性が得られず、界面の接着性が不良
になったり、空洞が残るなどの不具合が生じる。この工
程で生じた不具合は、最終の繊維強化熱可塑性樹脂シ−
トの物性に大きな影響を及ぼすため、最も注意が必要で
ある。The second is a step of applying a thermoplastic resin to the opened fibers. Examples of the method of applying the thermoplastic resin include a method of directly impregnating a molten thermoplastic resin, a method of melting and impregnating a film-like thermoplastic resin, and a method of melting and impregnating a powdery thermoplastic resin. However, the present invention is not particularly limited to these. What is important in the step of applying the thermoplastic resin to the continuous glass fiber is that the continuous glass fiber and the thermoplastic resin are sufficiently integrated. For example, in the previous step, if the fiber openability is poor, impregnation of the thermoplastic resin becomes difficult, the wettability of the continuous glass fiber and the thermoplastic resin cannot be obtained, and the adhesiveness at the interface becomes poor, Problems such as leaving voids occur. The defect that occurred in this process is the final fiber reinforced thermoplastic resin seal.
It requires the most attention because it has a great influence on the physical properties of the gem.
【００２０】第３には、連続ガラス繊維強化熱可塑性樹
脂複合材料を所望の寸法に裁断する工程が必要である。
この際、繊維軸に垂直な方向の幅や繊維軸方向の長さ
は、慎重に選択することが必要である。裁断の方法は特
に限定されないが、ペレタイザ−、ギロチン方式、コダ
ック方式等のカッタ−が利用できる。Thirdly, a step of cutting the continuous glass fiber reinforced thermoplastic resin composite material into a desired size is required.
At this time, it is necessary to carefully select the width in the direction perpendicular to the fiber axis and the length in the fiber axis direction. The cutting method is not particularly limited, but a cutter such as a pelletizer, a guillotine method, or a Kodak method can be used.
【００２１】第４には、裁断された薄片を無配向に、均
一に堆積させる工程である。この工程で重要なことは薄
片を面内に良く分散させることである。薄片などを分
散、堆積させる方法としては、チョップドストランドマ
ットの製造に用いられるような方法が利用できる。例え
ば連続的に生産する場合は前記工程の長手方向の裁断し
た薄片を直接高い位置から自然落下させ、ベルトコンベ
ア−上に堆積させる方法や、落下経路にエア−を吹き込
むか、もしくは邪魔板を取り付ける方法などが考えられ
る。バッチ式の製造の場合は、予め裁断した薄片を容器
に蓄積しておき、この容器の下面に搬送装置を取り付け
金型へ分散させる方法などが考えられる。The fourth step is to uniformly deposit the cut thin pieces in a non-oriented manner. What is important in this step is to disperse the flakes well in the plane. As a method for dispersing and depositing thin pieces and the like, a method used for manufacturing a chopped strand mat can be used. For example, in the case of continuous production, a method in which the thin slices cut in the longitudinal direction of the above process are naturally dropped directly from a high position and accumulated on a belt conveyor, or air is blown into the fall path or a baffle plate is attached. Methods etc. are considered. In the case of batch-type production, a method is conceivable in which thin pieces that have been cut are accumulated in a container in advance, and a carrier is attached to the lower surface of the container to disperse them in a mold.
【００２２】最後に堆積した薄片を溶融する第５工程で
は、ベルトプレスにより加熱冷却を連続して行う方法
や、加熱冷却プレスを用いるバッチ方式などが考えられ
る。分散された薄片は上記の工程において既に樹脂がガ
ラス繊維間へ含浸しているため、シ−トへの成形は比較
的低圧で行うことができる。即ち、堆積させた薄片と薄
片との間にある空気を押し出すだけの圧力があれば、優
れた含浸状態のシ−トを得ることができる。In the fifth step of melting the finally deposited thin pieces, a method of continuously heating and cooling by a belt press, a batch method of using a heating and cooling press, and the like can be considered. Since the dispersed flakes are already impregnated with the resin between the glass fibers in the above step, the sheet can be molded at a relatively low pressure. That is, a sheet in an excellent impregnated state can be obtained if the pressure is sufficient to push the air between the deposited thin pieces.
【００２３】[0023]
【実施例】以下に実施例を挙げて、本発明を具体的に説
明するが、本発明はこれらに限定されるものではない。
なお各評価については以下の通りに行った。強化繊維の
重量含有率（Ｗｆ）は、ＪＩＳ Ｋ ７０５２に準じ、
厚さ２mm、２５０mm角の熱可塑性樹脂シ−トの任意の位
置から切り出した２ｇ以上を電子天秤を使用して、１mg
まで正確に測定し、これを電気炉中で雰囲気温度６２５
℃で、４時間加熱した。炭素質が完全になくなってから
デシケ−タに移して室温になるまで冷し、焼成後の質量
を１mgまで測定した。焼成前後の質量からガラス繊維の
重量含有率を算出した。EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto.
In addition, each evaluation was performed as follows. The weight content (Wf) of the reinforcing fiber is based on JIS K 7052,
2 mg or more of a 2 mm-thick 250 mm square thermoplastic resin sheet cut out from an arbitrary position is 1 mg using an electronic balance.
Accurately measure up to 625 atmosphere temperature in an electric furnace
Heat at 4 ° C. for 4 hours. After the carbonaceous material was completely removed, it was transferred to a desiccator, cooled to room temperature, and the mass after firing was measured to 1 mg. The weight content of glass fiber was calculated from the mass before and after firing.
【００２４】次いで重量含有率を求めた同一の平板よ
り、１０／（１００−Ｗｆ）ｇの試料をニッパ−を用い
て削り出し、これを予乾燥したルツボ（乾燥後の重量を
Ｍ１ｇとする）に入れ、電子天秤で０．１mgの単位まで
秤量し（これをＭ２ｇとする）、ＪＩＳ Ｋ ７０５２
に準じる温度（６２５℃）で４時間焼成して樹脂分を取
り除いた後、デシケ−タ中で十分に放冷し、サンプルを
含むルツボを電子天秤で０．１mgの単位まで秤量した
（これをＭ３ｇとする）。これらの値を用いて、次式に
より繊維重量含有率（Ｚｆ）を算出した。 Ｚｆ＝（Ｍ３−Ｍ１）／（Ｍ２−Ｍ１）×１００ 但し、Ｚｆ：繊維の重量含有率（％） Ｍ１：ルツボの乾燥質量 Ｍ２：焼成前のルツボとサンプルの質量 Ｍ３：焼成後のルツボとサンプルの質量 である。Then, a sample of 10 / (100-Wf) g was cut out from the same flat plate whose weight content was obtained by using a nipper, and this was pre-dried crucible (weight after drying is M1g). And weigh it to the unit of 0.1 mg with an electronic balance (M2g), JIS K 7052
After removing the resin component by baking at a temperature (625 ° C.) according to the above, the crucible containing the sample was weighed to a unit of 0.1 mg by an electronic balance (this was measured). M3g). Using these values, the fiber weight content (Zf) was calculated by the following formula. Zf = (M3-M1) / (M2-M1) × 100 where Zf: fiber weight content (%) M1: dry mass of crucible M2: mass of crucible and sample before firing M3: crucible after firing The mass of the sample.
【００２５】繊維の平均繊維長は、厚さ２mm、１００mm
角の試料をＪＩＳ Ｋ ７０５２に準じる温度（６２５
℃）で４時間焼成して樹脂分を取り除いた後、この残渣
中に含まれる任意の強化繊維１００本を取り出し、これ
らの長さを０．５mmの精度を持つ金尺で測定し、これら
の平均値を求めた。繊維の交絡の度合いは、上述の平均
繊維長を求めるために任意の１本の繊維を引き抜く際の
引き抜き易さで求め、引き抜きが容易な場合は○、引き
抜きが困難な場合は×で表した。更に、焼成前の繊維強
化熱可塑性樹脂シ−トの厚みと、焼成後の残渣の厚みを
ノギスで測定し、この厚みの比を計算し、この比が０．
９５から１．１０の範囲に入るものを○、これを越える
ものを×として示した。The average fiber length of the fibers is 2 mm and 100 mm in thickness.
The corner sample is subjected to the temperature (625
After removing the resin component by baking at (° C) for 4 hours, 100 arbitrary reinforcing fibers contained in this residue are taken out, and their lengths are measured with a metal gauge having an accuracy of 0.5 mm. The average value was calculated. The degree of entanglement of fibers was determined by the ease of pulling out any one fiber in order to determine the above-mentioned average fiber length. When the pulling out was easy, it was represented by ○, and when it was difficult, it was represented by X. . Furthermore, the thickness of the fiber-reinforced thermoplastic resin sheet before firing and the thickness of the residue after firing are measured with a caliper, and the ratio of this thickness is calculated.
Those that fall within the range of 95 to 1.10 are shown as ◯, and those that exceed this range are shown as x.
【００２６】これらの同一の熱可塑性樹脂シ−トから、
ＪＩＳ Ｋ ７０５２に規定される曲げ試験方法のＡ法
により、曲げ弾性率、曲げ強度を測定し、〔表１〕に示
した。（測定値は５個のサンプルの平均値である）。こ
の場合、比較例１及び２については面内の異方性を持つ
ため、繊維軸方向（０°）と、繊維軸と４５°の角度を
成す方向についても検討を行った。賦形性の評価に関し
ては、溝加工を施した金型に材料を投入し、この溝部分
への材料の流れ込みを断面観察により評価を行った。強
化繊維の流動性が良好なものについては○、殆ど強化繊
維が流れ込んでいないものについては×で示した。From these same thermoplastic resin sheets,
The flexural modulus and flexural strength were measured according to the bending test method A specified in JIS K 7052, and the results are shown in [Table 1]. (The measured value is an average value of 5 samples). In this case, since Comparative Examples 1 and 2 have in-plane anisotropy, the fiber axis direction (0 °) and the direction forming an angle of 45 ° with the fiber axis were also examined. Regarding the evaluation of the shapeability, the material was put into a grooved mold, and the inflow of the material into the groove portion was evaluated by observing the cross section. O indicates that the reinforcing fibers have good fluidity, and X indicates that the reinforcing fibers hardly flow in.
【００２７】[0027]
【実施例１】まず繊維軸に垂直な方向に幅１５mm以上に
開繊したガラス繊維束に、溶融したポリエチレンテレフ
タレ−トをダイ内にて含浸して幅１０mmの連続ガラス繊
維強化ポリエチレンテレフタレ−トを作製した。これを
ギロチン方式の裁断機を用いて、長さ２０mmに裁断し、
高さ１．５ｍの位置より金型に自然落下させ、無方向的
に堆積させた。このガラス繊維とポリエチレンテレフタ
レ−ト樹脂からなる繊維強化熱可塑性樹脂薄片の堆積物
を、加熱冷却プレスを用いて、成形温度２８５℃、成形
圧力１０kgｆ／cm2 、成形時間１０分の条件で加熱溶融
し、厚み２mmのシ−ト状成形物を得た。評価結果を〔表
１〕に示す。Example 1 First, a glass fiber bundle opened to a width of 15 mm or more in a direction perpendicular to the fiber axis was impregnated with molten polyethylene terephthalate in a die to form a continuous glass fiber reinforced polyethylene terephthalate having a width of 10 mm. -G. Using a guillotine type cutting machine, cut this to a length of 20 mm,
It was naturally dropped into the mold from a position of 1.5 m in height and deposited non-directionally. The deposit of the fiber-reinforced thermoplastic resin flakes composed of this glass fiber and polyethylene terephthalate resin is heated using a heating and cooling press at a molding temperature of 285 ° C., a molding pressure of 10 kgf / cm 2 , and a molding time of 10 minutes. It was melted to obtain a sheet-shaped molded product having a thickness of 2 mm. The evaluation results are shown in [Table 1].
【００２８】[0028]
【表１】 [Table 1]
【００２９】[0029]
【実施例２】熱可塑性樹脂がポリプロピレン樹脂からな
ることが、実施例１と異なる繊維強化熱可塑性樹脂薄片
の堆積物を、成形温度２２０℃、成形圧力１０kgｆ／cm
2 、成形時間１０分の条件で加熱冷却プレス成形し、厚
さ２mmのシ−ト状成形物を作製した。評価結果を〔表
１〕に示す。[Example 2] A deposit of fiber-reinforced thermoplastic resin flakes, which is different from Example 1 in that the thermoplastic resin is a polypropylene resin, is formed at a molding temperature of 220 ° C and a molding pressure of 10 kgf / cm.
2. Heat-cooling press molding was performed under the condition of molding time of 10 minutes to produce a sheet-shaped molded product having a thickness of 2 mm. The evaluation results are shown in [Table 1].
【００３０】[0030]
【実施例３】裁断した繊維強化熱可塑性樹脂薄片の長さ
が５０mmであることのみが実施例２と異なる堆積物を、
成形温度２２０℃、成形圧力１０kgｆ／cm2 、成形時間
１０分の条件でプレス成形し、厚さ２mmのシ−ト状成形
物を作製した。評価結果を〔表１〕に示す。Example 3 A deposit different from that of Example 2 only in that the cut fiber-reinforced thermoplastic resin flakes had a length of 50 mm was prepared.
Press molding was carried out under the conditions of molding temperature of 220 ° C., molding pressure of 10 kgf / cm 2 and molding time of 10 minutes to produce a sheet-shaped molded product having a thickness of 2 mm. The evaluation results are shown in [Table 1].
【００３１】[0031]
【実施例４】実施例２とはガラス繊維とポリプロピレン
樹脂の配合比が異なる繊維強化熱可塑性樹脂を、成形温
度２２０℃、成形圧力１０kgｆ／cm2 、成形時間１０分
の条件でプレス成形し、厚さ２mmのシ−ト状成形物を作
製した。評価結果を〔表１〕に示す。Example 4 A fiber reinforced thermoplastic resin having a different compounding ratio of glass fiber and polypropylene resin from Example 2 was press-molded under the conditions of a molding temperature of 220 ° C., a molding pressure of 10 kgf / cm 2 and a molding time of 10 minutes, A sheet-shaped molded product having a thickness of 2 mm was produced. The evaluation results are shown in [Table 1].
【００３２】[0032]
【実施例５】実施例２とはガラス繊維とポリプロピレン
樹脂の配合比が異なる繊維強化熱可塑性樹脂を、成形温
度２２０℃、成形圧力１０kgｆ／cm2 、成形時間１０分
の条件でプレス成形し、厚さ２mmのシ−ト状成形物を作
製した。評価結果を〔表１〕に示す。Example 5 A fiber reinforced thermoplastic resin having a different compounding ratio of glass fiber and polypropylene resin from Example 2 was press-molded under the conditions of a molding temperature of 220 ° C., a molding pressure of 10 kgf / cm 2 and a molding time of 10 minutes, A sheet-shaped molded product having a thickness of 2 mm was produced. The evaluation results are shown in [Table 1].
【００３３】[0033]
【実施例６】ガラス繊維とナイロン６樹脂からなる繊維
強化熱可塑性樹脂を、成形温度２５０℃、成形圧力１０
kgｆ／cm2 、成形時間１０分の条件でプレス成形し、厚
さ２mmのシ−ト状成形物を作製した。評価結果を〔表
１〕に示す。Example 6 A fiber-reinforced thermoplastic resin composed of glass fiber and nylon 6 resin was molded at a molding temperature of 250 ° C. and a molding pressure of 10
Press molding was performed under the conditions of kgf / cm 2 and molding time of 10 minutes to prepare a sheet-shaped molded product having a thickness of 2 mm. The evaluation results are shown in [Table 1].
【００３４】[0034]
【比較例１】ガラス繊維とポリプロピレン樹脂からなる
一方向連続繊維強化プリプレグシ−トを積層し、これを
成形温度２２０℃、成形圧力１０kgｆ／cm2 、成形時間
１０分の条件でプレス成形し、厚さ２mmのシ−ト状成形
物を作製した。評価結果を〔表１〕に示す。[Comparative Example 1] A unidirectional continuous fiber reinforced prepreg sheet made of glass fiber and polypropylene resin was laminated, and this was press-molded under conditions of a molding temperature of 220 ° C, a molding pressure of 10 kgf / cm 2 and a molding time of 10 minutes, and a thickness A sheet-shaped molded product having a length of 2 mm was produced. The evaluation results are shown in [Table 1].
【００３５】[0035]
【比較例２】ガラス繊維織物とポリプロピレン樹脂から
なる連続繊維強化プリプレグシ−トを積層し、これを成
形温度２２０℃、成形圧力１０kgｆ／cm2 、成形時間１
０分の条件でプレス成形し、厚さ２mmのシ−ト状成形物
を作製した。評価結果を〔表１〕に示す。[Comparative Example 2] A continuous fiber-reinforced prepreg sheet made of a glass fiber woven fabric and polypropylene resin was laminated, and this was molded at a molding temperature of 220 ° C, a molding pressure of 10 kgf / cm 2 , and a molding time of 1.
Press molding was carried out under the condition of 0 minutes to prepare a sheet-shaped molded product having a thickness of 2 mm. The evaluation results are shown in [Table 1].
【００３６】[0036]
【比較例３】連続ガラス繊維スワ−ルマットとポリプロ
ピレン樹脂からなる繊維強化熱可塑性樹脂を、成形温度
２２０℃、成形圧力１０kgｆ／cm2 、成形時間１０分の
条件でプレス成形し、厚さ２mmのシ−ト状成形物を作製
した。評価結果を〔表１〕に示す。[Comparative Example 3] A fiber-reinforced thermoplastic resin comprising a continuous glass fiber swirl mat and a polypropylene resin was press-molded under the conditions of a molding temperature of 220 ° C, a molding pressure of 10 kgf / cm 2 and a molding time of 10 minutes. A sheet-shaped molded product was produced. The evaluation results are shown in [Table 1].
【００３７】[0037]
【比較例４】ガラスのチョップドストランドとポリエチ
レンテレフタレ−ト樹脂からなる繊維強化熱可塑性樹脂
を、成形温度２８５℃、成形圧力１０kgｆ／cm2 、成形
時間１０分の条件でプレス成形し、厚さ２mmのシ−ト状
成形物を作製した。評価結果を〔表１〕に示す。[Comparative Example 4] A fiber-reinforced thermoplastic resin composed of glass chopped strands and polyethylene terephthalate resin was press-molded under the conditions of a molding temperature of 285 ° C, a molding pressure of 10 kgf / cm 2 and a molding time of 10 minutes to obtain a thickness. A 2 mm sheet-shaped molded product was produced. The evaluation results are shown in [Table 1].
【００３８】[0038]
【発明の効果】本発明の繊維強化熱可塑性樹脂シ−ト
は、従来の繊維強化熱可塑性樹脂シ−トと比較して、強
化繊維の重量含有率が高く、分散性が良好で、面内に強
化繊維がランダムに分散されているため、強度、弾性率
等の物性に優れ、ほぼ面内等方性であり、かつ後加工時
の強化繊維の流動性も良好な優れた成形材料である。EFFECT OF THE INVENTION The fiber-reinforced thermoplastic resin sheet of the present invention has a high weight content of reinforcing fibers, good dispersibility, and in-plane comparison with conventional fiber-reinforced thermoplastic resin sheets. Since the reinforcing fibers are randomly dispersed in the above, it is an excellent molding material that has excellent physical properties such as strength and elastic modulus, is approximately in-plane isotropic, and has good fluidity of the reinforcing fibers during post-processing. .
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成８年１１月５日[Submission date] November 5, 1996
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００６[Correction target item name] 0006
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに本発明の第１は、熱可塑性樹脂と強化繊維とを主成
分とし、強化繊維の重量含有率、５０％から８５％、熱
可塑性樹脂の重量含有率、１５％から５０％、強化繊維
の平均繊維長、５ｍｍから５０ｍｍであり、強化繊維が
実質的に無方向に分散されたランダム強化タイプである
ことを特徴とする繊維強化熱可塑性樹脂シートである。
その第２は、ＪＩＳ Ｋ ７０５２に準じて得られた強
化繊維の重量含有率（Ｗｆ）に対して、任意の場所から
切り出した１０／（１００−Ｗｆ）ｇの繊維強化熱可塑
性樹脂シートの小片中に含まれる強化繊維の重量含有率
（Ｚｆ）が次式で表される範囲にあることを特徴とす
る、上記第１発明記載の繊維強化熱可塑性樹脂シートで
ある。 （Ｗｆ−２）＜Ｚｆ＜（Ｗｆ＋２） 但し、Ｗｆ：２ｇ以上のサンプルから得られた強化繊維
の重量含有率（％） Ｚｆ：１０／（１００−Ｗｆ）ｇのサンプルから得られ
た強化繊維の重量含有率（％） その第３は、繊維強化熱可塑性樹脂シートをＪＩＳ Ｋ
７０５２に示される温度条件（６２５℃）で炭素質が
実質的に無くなるまで加熱した後の残渣が次式を満足す
ることを特徴とする、第１又は第２発明の繊維強化熱可
塑性樹脂シートである。 ０．９５＜（ｔ２／ｔ１）＜１．１０ 但し、ｔ１：長繊維強化熱可塑性樹脂シートの厚み（ｍ
ｍ） ｔ２：残渣の厚み（ｍｍ） その第４は、繊維強化熱可塑性樹脂シートをＪＩＳ Ｋ
７０５２に示される温度条件（６２５℃）で炭素質が
実質的に無くなるまで加熱した後の残渣中に含まれる強
化繊維が実質的に交絡していないことを特徴とする上記
第１、第２又は第３発明記載の繊維強化熱可塑性樹脂シ
ートである。更にその第５は、強化繊維がガラス繊維で
あり、熱可塑性樹脂がポリエステル系樹脂、ポリオレフ
ィン系樹脂及び／又はポリアミド系樹脂である上記第
１、第２、第３又は第４発明記載の繊維強化熱可塑性樹
脂シートである。In order to achieve the above-mentioned object, the first object of the present invention is to use a thermoplastic resin and a reinforcing fiber as main components, and the weight content of the reinforcing fiber is from 50% to 85%. Fiber reinforcement characterized by having a weight content of a plastic resin of 15% to 50%, an average fiber length of reinforcing fibers of 5 mm to 50 mm, and being a random reinforcing type in which reinforcing fibers are dispersed substantially non-directionally. It is a thermoplastic resin sheet.
The second is a small piece of the fiber-reinforced thermoplastic resin sheet of 10 / (100-Wf) g cut out from an arbitrary position with respect to the weight content (Wf) of the reinforcing fiber obtained according to JIS K 7052. It is the fiber reinforced thermoplastic resin sheet according to the first invention, characterized in that the weight content (Zf) of the reinforcing fibers contained therein is in the range represented by the following formula. (Wf-2) <Zf <(Wf + 2) However, Wf: Reinforcement fiber obtained from the sample of 2g or more, and the weight content rate (%) of Zf: 10 / (100-Wf) g. The weight content (%) of the third is the fiber reinforced thermoplastic resin sheet according to JIS K
A fiber-reinforced thermoplastic resin sheet of the first or second invention, characterized in that the residue after heating under the temperature condition (625 ° C.) shown in 7052 until the carbonaceous substance is substantially eliminated satisfies the following formula: is there. 0.95 <(t2 / t1) <1.10 where t1: thickness of long fiber reinforced thermoplastic resin sheet (m
m) t2: Thickness of residue (mm) The fourth is a fiber reinforced thermoplastic resin sheet according to JIS K
7052, wherein the reinforcing fibers contained in the residue after heating until the carbonaceous substance is substantially eliminated under the temperature condition (625 ° C.) shown in 7052 are not substantially entangled. It is a fiber-reinforced thermoplastic resin sheet according to the third invention. Fifth, the reinforcing fiber is glass fiber, and the thermoplastic resin is polyester resin or polyolefin.
Fin system the first is a resin and / or polyamide-based resin, a second, a third or fiber-reinforced thermoplastic resin sheet of the fourth invention described.
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１０[Correction target item name] 0010
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１０】更に繊維強化熱可塑性樹脂シートがＪＩＳ
Ｋ ７０５２に示される温度条件（６２５℃）で炭素
質が実質的に無くなるまで加熱した残渣が次式を満たす
ことが望ましい。 ０．９５＜（ｔ２／ｔ１）＜１．１０ 但し、ｔ１：加熱前の厚み（ｍｍ） ｔ２：残渣の厚み（ｍｍ） 加熱前の厚みと残渣の厚みとの比（ｔ２／ｔ１）が大き
い場合、強化繊維の弾性回復によるスプリングバック
（Ｓｐｒｉｎｇ ｂａｃｋ）がその原因として上げられ
る。このような現象は熱可塑性樹脂に埋め込まれている
強化繊維が、大きな弾性変形によるエネルギーを蓄積し
ている証拠であり、このエネルギーは残留応力として蓄
積されている。残留応力は長期使用には徐々に開放され
るか、もしくは熱可塑性樹脂の熱変形温度近辺における
使用中にシートの寸法安定性に悪影響を与えることがあ
り、問題である。しかしながら繊維強化熱可塑性樹脂シ
ートが０．９５＜（ｔ２／ｔ１）＜１．１０の条件を満
足する場合には、強化繊維に大きな弾性エネルギーが蓄
積されていないのである。（ｔ２／ｔ１）の値が上記以
外の場合は強化繊維に大きな弾性エネルギーが蓄積され
ており、熱可塑性樹脂シートの寸法安定性に悪影響があ
り採用することができない。Further, the fiber reinforced thermoplastic resin sheet is JIS
It is desirable that the residue heated under the temperature condition (625 ° C.) indicated by K 7052 until the carbonaceous substance substantially disappears satisfies the following formula. 0.95 <(t2 / t1) <1.10 However, t1: Thickness before heating (mm) t2: Thickness of residue (mm) Ratio of thickness before heating and thickness of residue (t2 / t1) is large. In this case, a spring back due to elastic recovery of the reinforcing fiber is raised as the cause. Such a phenomenon is evidence that the reinforcing fibers embedded in the thermoplastic resin accumulate energy due to large elastic deformation, and this energy is accumulated as residual stress. Residual stress is a problem because it may be gradually released for long-term use or may adversely affect the dimensional stability of the sheet during use near the heat distortion temperature of the thermoplastic resin. However, if the fiber-reinforced thermoplastic resin sheet satisfies 0.95 <(t2 / t1) < 1.10 condition is the large elastic energy reinforcing fibers not accumulated. When the value of (t2 / t1) is other than the above value, a large amount of elastic energy is accumulated in the reinforcing fiber, which adversely affects the dimensional stability of the thermoplastic resin sheet and cannot be adopted.
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１１[Correction target item name] 0011
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１１】即ち、ｔ２／ｔ１≦０．９５の場合は６２
５℃で繊維強化熱可塑性樹脂成形品シート中の樹脂成分
を燃えつくした場合には残渣の形態がもとの樹脂シート
の形態よりも収縮、所謂へこみ（極端にはもとの形態を
とどめない）を生ずるし、また、ｔ２／ｔ１≧１．１０
の場合は、同様な処理によって残渣の形態が拡張され
て、成形品の寸法安定性を害し、本発明の目的を達成す
ることができないのである。しかもｔ２／ｔ１を測定す
ることによって始めて上記の現象が明らかになった。例
えばガラス繊維が不均一に樹脂シートの面内に分散され
ている場合は、上記のへこみや拡張が生じ、ｔ２／ｔ１
≦０．９５か又はｔ２／ｔ１≧１．１０となることが本
発明者等によって始めて見出されたのである。That is, when t2 / t1 ≦ 0.95, 62
5 ° C. In the fiber-reinforced thermoplastic resin formed molded article when the exhausted burning resin component in the sheet residue forms shrinkage than the form of the original resin sheet, kept the original form in so-called indentation (extremes No), and t2 / t1 ≧ 1.10.
In such a case, the morphology of the residue is expanded by the same treatment, impairing the dimensional stability of the molded product, and the object of the present invention cannot be achieved. Moreover, the above phenomenon became apparent only by measuring t2 / t1. For example, when the glass fibers are unevenly dispersed in the surface of the resin sheet, the above-mentioned dents and expansions occur and t2 / t1
It was first discovered by the present inventors that ≦ 0.95 or t2 / t1 ≧ 1.10.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１３[Correction target item name] 0013
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１３】次いで、繊維強化熱可塑性樹脂シートをＪ
ＩＳ Ｋ ７０５２に示される温度条件（６２５℃）で
炭素質が実質的に無くなるまで加熱した後の残渣中に含
まれる強化繊維が実質的に交絡していないことが本発明
の望ましい要件の一つである。このような特徴を持つ繊
維強化熱可塑性樹脂シートは、連続した平面を持つシェ
ル構造において非常に有効である。シェル構造の変形に
よるひずみは、熱可塑性樹脂と熱可塑性樹脂−強化繊維
界面及び強化繊維への伝達を繰り返す。強化繊維が実質
的に交絡していない繊維強化熱可塑性樹脂シートは、強
化繊維の高い弾性率及び強度を活かし、しかも熱可塑性
樹脂の持つ延性を十分に発揮することができる。つまり
本発明の強化繊維と熱可塑性樹脂との組み合わされた繊
維強化熱可塑性樹脂シートは、その弾性率、強度が発現
されるのみならず、靭性も十分に発揮することができ
る。繊維強化熱可塑性樹脂シートにおいて、強化繊維が
実質的に交絡していないことにより、この繊維強化熱可
塑性樹脂シートを複雑形状を有する構造物に後成形加工
（例えばスタンピング成形やホットプレス成形）する
際、強化繊維の流動性が良好であり、構造物中での繊維
重量含有率のばらつきを最小限に押さえることができ
る。Then, a fiber-reinforced thermoplastic resin sheet is attached to J
It is one of the desirable requirements of the present invention that the reinforcing fibers contained in the residue after being heated under the temperature condition (625 ° C.) shown in IS K 7052 until substantially free of carbonaceous matter are not substantially entangled. Is. The fiber reinforced thermoplastic resin sheet having such characteristics is very effective in a shell structure having a continuous flat surface. The strain due to the deformation of the shell structure is repeatedly transmitted to the thermoplastic resin and the thermoplastic resin-reinforced fiber interface and the reinforcing fiber. The fiber-reinforced thermoplastic resin sheet in which the reinforcing fibers are not substantially entangled can take advantage of the high elastic modulus and strength of the reinforcing fibers and can sufficiently exhibit the ductility of the thermoplastic resin. That is, the fiber-reinforced thermoplastic resin sheet of the present invention in which the reinforcing fiber and the thermoplastic resin are combined can exhibit not only its elastic modulus and strength but also its toughness. In fiber-reinforced thermoplastic resin sheet, by the reinforcing fibers are not substantially entangled, post molding the fiber-reinforced thermoplastic resin sheet structure having a complicated shape (e.g., stamping or hot-flop press forming) At this time, the fluidity of the reinforcing fibers is good, and it is possible to minimize the variation in the fiber weight content in the structure.
【手続補正５】[Procedure Amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２６[Correction target item name] 0026
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２６】これらの同一の熱可塑性樹脂シートから、
ＪＩＳ Ｋ ７０５５に指定される曲げ試験方法のＡ法
により、曲げ弾性率、曲げ強度を測定し、〔表１〕に示
した。（測定値は５個のサンプルの平均値である）。こ
の場合、比較例１及び２については面内の異方性を持つ
ため、繊維軸方向（０゜）と、繊維軸と４５゜の角度を
成す方向についても検討を行った。賦形性の評価に関し
ては、溝加工を施した金型に材料を投入し、この溝部分
への材料の流れ込みを断面観察により評価を行った。強
化繊維の流動性が良好なものについては○、殆ど強化繊
維が流れ込んでいないものについては×で示した。From these same thermoplastic resin sheets,
The A method of bending test method specified in JIS K 705 5, and flexural modulus, flexural strength measurements are shown in Table 1. (The measured value is an average value of 5 samples). In this case, since Comparative Examples 1 and 2 have in-plane anisotropy, the fiber axis direction (0 °) and the direction forming an angle of 45 ° with the fiber axis were also examined. Regarding the evaluation of the shapeability, the material was put into a grooved mold, and the inflow of the material into the groove portion was evaluated by observing the cross section. O indicates that the reinforcing fibers have good fluidity, and X indicates that the reinforcing fibers hardly flow in.
【手続補正６】[Procedure correction 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３７[Correction target item name] 0037
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００３７】[0037]
【比較例４】ガラスのチョップドストランドマットとポ
リエチレンテレフタレート樹脂からなる繊維強化熱可塑
性樹脂を、成形温度２８５℃、成形圧力１０ｋｇｆ／ｃ
ｍ２、成形時間１０分の条件でプレス成形し、厚さ２ｍ
ｍのシート状成形物を作製した。評価結果を〔表１〕に
示す。Comparative Example 4 A glass reinforced chopped strand mat and a fiber reinforced thermoplastic resin made of polyethylene terephthalate resin were molded at a molding temperature of 285 ° C. and a molding pressure of 10 kgf / c.
m 2 and press molding under the condition of molding time 10 minutes, thickness 2m
A sheet-shaped molded product of m was produced. The evaluation results are shown in [Table 1].
【手続補正７】[Procedure amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】表１[Name of items to be corrected] Table 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【表１】 [Table 1]
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｋ 309:08 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location B29K 309: 08
Claims (5)
し、ランダム強化タイプである下記３条件を満足する構
成よりなることを特徴とする繊維強化熱可塑性樹脂シ−
ト。 (1) 強化繊維の重量含有率が５０％から８５％であり、
熱可塑性樹脂の重量含有率が１５％から５０％であるこ
と。 (2) 強化繊維の平均繊維長が５mm〜５０ mm であるこ
と。 (3) 強化繊維が無方向に分散されていること。1. A fiber-reinforced thermoplastic resin sheet which comprises a thermoplastic resin and a reinforcing fiber as main components and which is a random reinforcing type and which satisfies the following three conditions.
G. (1) The weight content of the reinforcing fibers is 50% to 85%,
The weight content of the thermoplastic resin is 15% to 50%. (2) The average fiber length of the reinforcing fibers is 5 mm to 50 mm. (3) Reinforcing fibers are dispersed in a non-directional manner.
強化繊維の重量含有率（Ｗｆ）に対して、任意の場所か
ら切り出した１０／（１００−Ｗｆ）ｇの繊維強化熱可
塑性樹脂シ−トの小片中に含まれる強化繊維の重量含有
率（Ｚｆ）が次式で表される範囲にあることを特徴とす
る請求項１記載の繊維強化熱可塑性樹脂シ−ト。 （Ｗｆ−２）＜Ｚｆ＜（Ｗｆ＋２） 但し、Ｗｆ：２ｇ以上のサンプルから得られた強化繊維
の重量含有率（％） Ｚｆ：１０／（１００−Ｗｆ）ｇのサンプルから得られ
た強化繊維の重量含有率（％）2. A fiber-reinforced thermoplastic resin sheet of 10 / (100-Wf) g cut out from an arbitrary place with respect to the weight content (Wf) of the reinforcing fiber obtained according to JIS K 7052. 2. The fiber reinforced thermoplastic resin sheet according to claim 1, wherein the weight content (Zf) of the reinforcing fibers contained in the small pieces is in the range represented by the following formula. (Wf-2) <Zf <(Wf + 2) However, Wf: Reinforcement fiber obtained from the sample of 2g or more, and the weight content rate (%) of Zf: 10 / (100-Wf) g. Weight content of (%)
Ｋ ７０５２に示される温度条件（６２５℃）で炭素質
が実質的に無くなるまで加熱した後の残渣が、次式を満
足することを特徴とする請求項１又は２記載の繊維強化
熱可塑性樹脂シ−ト。 ０．９５＜（ｔ２／ｔ１）＜１．１０ ここに、ｔ１：繊維強化熱可塑性樹脂シ−トの厚み（m
m） ｔ２：残渣の厚み（mm）3. A fiber reinforced thermoplastic resin sheet according to JIS
The fiber-reinforced thermoplastic resin sheet according to claim 1 or 2, wherein the residue after heating under the temperature condition (625 ° C) shown in K 7052 until the carbonaceous substance is substantially eliminated satisfies the following formula. -G. 0.95 <(t2 / t1) <1.10, where t1: thickness of fiber reinforced thermoplastic resin sheet (m
m) t2: Thickness of residue (mm)
Ｋ ７０５２に示される温度条件（６２５℃）で炭素質
が実質的に無くなるまで加熱した後の残渣中に含まれる
強化繊維が交絡していないことを特徴とする請求項１又
は２又は３記載の繊維強化熱可塑性樹脂シ−ト。4. A fiber reinforced thermoplastic resin sheet according to JIS
The reinforcing fibers contained in the residue after heating until the carbonaceous substance is substantially eliminated under the temperature condition (625 ° C.) shown in K 7052 are not entangled with each other. Fiber reinforced thermoplastic resin sheet.
塑性樹脂がポリエステル系樹脂、ポリオレフィン系樹脂
及び／又はポリアミド系樹脂であることを特徴とする請
求項１又は２又は３又は４記載の繊維強化熱可塑性樹脂
シ−ト。5. The fiber according to claim 1, wherein the reinforcing fiber is a glass fiber, and the thermoplastic resin is a polyester resin, a polyolefin resin and / or a polyamide resin. Reinforced thermoplastic resin sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33817395A JP2877052B2 (en) | 1995-12-01 | 1995-12-01 | Fiber reinforced thermoplastic resin sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33817395A JP2877052B2 (en) | 1995-12-01 | 1995-12-01 | Fiber reinforced thermoplastic resin sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09155862A true JPH09155862A (en) | 1997-06-17 |
| JP2877052B2 JP2877052B2 (en) | 1999-03-31 |
Family
ID=18315612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33817395A Expired - Fee Related JP2877052B2 (en) | 1995-12-01 | 1995-12-01 | Fiber reinforced thermoplastic resin sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2877052B2 (en) |
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1995
- 1995-12-01 JP JP33817395A patent/JP2877052B2/en not_active Expired - Fee Related
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|---|---|
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