JPH06238659A - Stampable sheet expanded product excellent in bending yield strength - Google Patents

Stampable sheet expanded product excellent in bending yield strength

Info

Publication number
JPH06238659A
JPH06238659A JP2560193A JP2560193A JPH06238659A JP H06238659 A JPH06238659 A JP H06238659A JP 2560193 A JP2560193 A JP 2560193A JP 2560193 A JP2560193 A JP 2560193A JP H06238659 A JPH06238659 A JP H06238659A
Authority
JP
Japan
Prior art keywords
stampable sheet
fiber
expanded
sheet
expanded product
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
Application number
JP2560193A
Other languages
Japanese (ja)
Inventor
Seiji Hanatani
誠二 花谷
Yuichi Uchida
祐一 内田
Masabumi Komatsu
正文 小松
Masahiro Wakui
正浩 涌井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP2560193A priority Critical patent/JPH06238659A/en
Publication of JPH06238659A publication Critical patent/JPH06238659A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To more reduce a wt. and to enhance bending yield strength by constituting a reinforcing fiber of the braided fabrics layer arranged to the surface layer of a stampable sheet and the mat like fiber layer arranged to the intermediate part of the sheet and setting the pitch and density of the fiber bundles constituting the braided fabrics to specific ranges. CONSTITUTION:In a stampable sheet expanded product wherein a thermoplastic resin 30-80wt.% and a reinforcing fiber 20-70wt.% are integrated, the reinforcing fiber is constituted of the braided fabrics layer arranged to the surface layer of the stampable sheet and the mat like fiber layer arranged to the intermediate part of the sheet. The pitch of the fiber bundles constituting the braided fabrics is set to 3-30mm and the density thereof is set to 0.4-0.8. The stampable sheet expanded product is obtained by a method wherein a web consisting of a glass fiber and a granular thermoplastic resin is once produced and the braided fabrics are arranged on both sides of the web and heat and pressure are applied to the whole to impregnate the fibers with molten thermoplastic resin and the whole is cooled to be subsequently expanded.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、軽量でかつ強度が高い
という特徴を持つ繊維補強熱可塑性樹脂複合材料に関す
るものである。特に、軽量かつ曲げ特性に優れるという
特徴を持つスタンパブルシート膨張品に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber-reinforced thermoplastic resin composite material which is lightweight and has high strength. In particular, the present invention relates to an expanded product of a stampable sheet, which is lightweight and has excellent bending properties.

【0002】[0002]

【従来の技術】熱可塑性樹脂をマット状の補強繊維に含
浸させた繊維補強熱可塑性樹脂複合材料、いわゆるスタ
ンパブルシートが、近年急速に普及しつつある。その特
徴は、比重が 1.5以下と軽いこと、 200℃程度の温度を
与えてやれば数分のサイクル時間で容易に種々の成型体
にプレス加工できること、等である。
2. Description of the Related Art In recent years, a fiber-reinforced thermoplastic resin composite material in which a thermoplastic resin is impregnated in a mat-shaped reinforcing fiber, that is, a so-called stampable sheet has been rapidly spread. Its characteristics are that its specific gravity is as low as 1.5 or less, and that it can be easily pressed into various molded products within a cycle time of several minutes by applying a temperature of about 200 ° C.

【0003】ことに、特公平2−48423 号公報において
開示される抄紙法によりガラス繊維と粒状の熱可塑性樹
脂とからなるウェブを一度調製し、このウェブに熱と圧
力を加えた後、冷却して得られるスタンパブルシート
は、ガラス繊維がほとんど単繊維の状態にまで開繊され
ているので、これを再度、熱可塑性樹脂の融点以上に加
熱すると、樹脂に拘束されていたガラス繊維がスプリン
グバックを起こし、均一に膨張したスタンパブルシー
ト、即ちスタンパブルシート膨張品を得ることができ
る。
In particular, a web made of glass fiber and a granular thermoplastic resin is once prepared by the papermaking method disclosed in Japanese Patent Publication No. 2-48423, and the web is cooled by applying heat and pressure. In the stampable sheet obtained as a result, the glass fibers are opened to almost monofilament state, so if this is heated again above the melting point of the thermoplastic resin, the glass fibers that were bound by the resin will spring back. And a uniformly expandable stampable sheet, that is, a stampable sheet expanded product can be obtained.

【0004】[0004]

【発明が解決しようとする課題】このスタンパブルシー
ト膨張品の特徴は、軽いこと、比強度、比剛性が高いこ
とにある。ここで、比強度、比剛性は次式で定義され
る。 比強度=(曲げ強度)1/2 /スタンパブルシート膨張品
の密度 比剛性=(曲げ弾性率)1/3 /スタンパブルシート膨張
品の密度 通常、スタンパブルシートは膨張倍率と密度、曲げ強
度、曲げ弾性率が反比例の関係にある。例えば、膨張倍
率2のスタンパブルシート膨張品は膨張前のスタンパブ
ルシートに比して曲げ強度、密度とも1/2倍である
が、その比強度は1.4 倍となる。即ち、同一重量であれ
ば膨張倍率2のスタンパブルシート膨張品は膨張前のス
タンパブルシートよりも1.4 倍の曲げ荷重を支えること
ができる利点を持つ。ただし、当然ながらスタンパブル
シート膨張品の板厚は膨張前のスタンパブルシートの2
倍である。
The characteristics of the expanded product of the stampable sheet are that it is light and has high specific strength and specific rigidity. Here, the specific strength and the specific rigidity are defined by the following equations. Specific strength = (Bending strength) 1/2 / Density of expanded product of stampable sheet Specific rigidity = (Bending elastic modulus) 1/3 / Density of expanded product of stampable sheet Usually, stampable sheet has expansion ratio and density, bending strength , And the flexural modulus is inversely proportional. For example, an expanded product of a stampable sheet having an expansion ratio of 2 has a bending strength and a density of 1/2 times that of the stampable sheet before expansion, but the specific strength is 1.4 times. In other words, if the weight is the same, an expanded product of a stampable sheet with an expansion ratio of 2 has the advantage that it can support a bending load 1.4 times that of a stampable sheet before expansion. However, as a matter of course, the plate thickness of the expanded stampable sheet is 2 of that of the stampable sheet before expansion.
Double.

【0005】同様に、同じ曲げ荷重を受けた時、比剛性
の差により、膨張倍率2のスタンパブルシート膨張品は
膨張前のスタンパブルシートよりも 0.6倍のたわみしか
示さない。このように、スタンパブルシート膨張品は軽
くかつ曲げ耐力に優れている。軽いということは低コス
ト化に大きく寄与する。ただし、用途によっては、さら
なる軽量化と高曲げ特性等を要求される。例えば、自動
車内装部品であるシートバックやリアパッケージ、コン
クリート型枠用パネル等である。このような要求に対し
ては、従来の単繊維を補強繊維とするスタンパブルシー
ト膨張品では対応しきれない。なぜなら、単繊維を補強
繊維とするスタンパブルシートを2倍を越えて膨張させ
た場合、必然的に発生する空隙の割合が高くなり過ぎて
強度欠陥となるからである。特に、曲げ荷重が付与され
た場合には表層に最大応力が発生するため、表層の空隙
が強度欠陥となり、曲げ耐力の著しい低下をもたらす。
Similarly, when subjected to the same bending load, an expanded product of a stampable sheet having an expansion ratio of 2 shows only a flexure of 0.6 times that of the stampable sheet before expansion due to the difference in specific rigidity. In this way, the expanded stampable sheet is light and has excellent bending resistance. Being light contributes significantly to cost reduction. However, depending on the application, further weight reduction and high bending characteristics are required. For example, it is a seat back, a rear package, a panel for a concrete formwork, which are interior parts of an automobile. Conventional stamped sheet expanded products having monofilaments as reinforcing fibers cannot meet such demands. This is because when a stampable sheet having monofilament as a reinforcing fiber is expanded more than twice, the proportion of voids inevitably generated becomes too high, resulting in a strength defect. In particular, when a bending load is applied, the maximum stress is generated in the surface layer, and the voids in the surface layer become strength defects, resulting in a significant decrease in bending strength.

【0006】本発明の目的は、より軽く、より曲げ耐力
が向上されたスタンパブルシート膨張品を提供すること
にある。
An object of the present invention is to provide an expanded stampable sheet having a lighter weight and improved bending resistance.

【0007】[0007]

【課題を解決するための手段】本発明は、表面層の空隙
欠陥をなるべく除去するとともに、併せて表層部分の強
度を向上させれば、曲げ耐力に優れたスタンパブルシー
ト膨張品が得られることに着眼してなされたものであ
る。表面層の空隙欠陥の除去と強度の向上を達成するに
は、表層に繊維束のピッチが3〜30mm好ましくは5〜15
mmの範囲にある組布を配置すればよい。
According to the present invention, if a void defect in the surface layer is removed as much as possible and the strength of the surface layer portion is also improved, an expanded stampable sheet having excellent bending resistance can be obtained. It was made with a focus on. In order to remove void defects in the surface layer and improve the strength, the pitch of the fiber bundle in the surface layer is 3 to 30 mm, preferably 5 to 15 mm.
A braid within the range of mm may be arranged.

【0008】即ち、熱可塑性樹脂30〜80重量%と補強繊
維20〜70重量%が一体化して成るスタンパブルシート膨
張品であって、補強繊維が該スタンパブルシートの表層
に配置された組布層とそれらの中間に配置されたマット
状の繊維層で構成され、かつ組布を構成する繊維束のピ
ッチが3〜30mmの範囲内であり、密度が 0.4〜1.0 、好
ましくは 0.4〜 0.8の範囲にあることを特徴とするスタ
ンパブルシート膨張品である。
[0008] That is, a stampable sheet expanded product comprising 30-80% by weight of a thermoplastic resin and 20-70% by weight of reinforcing fibers, which is a braided fabric in which the reinforcing fibers are arranged on the surface layer of the stampable sheet. The fiber bundle is composed of a layer and a mat-like fiber layer arranged in the middle of the layers, and the pitch of the fiber bundle constituting the braid is in the range of 3 to 30 mm, and the density is 0.4 to 1.0, preferably 0.4 to 0.8. It is a stampable sheet expanded product characterized by being in the range.

【0009】[0009]

【作用】以下、本発明を詳細に説明する。本発明でいう
組布とは、例えば図1に示すように、複数本の連続繊維
束が交差し、その交点において繊維束同士が好ましくは
接着された構造を持つ基材である。図1は繊維束の交差
角が60度の、いわゆる3軸組布であるが、本発明に用い
られる組布としては、2軸組布(格子状組布)、3軸組
布、あるいはそれ以上の多次元組布、いずれを用いても
良い。
The present invention will be described in detail below. As used herein, the term “braided fabric” refers to a base material having a structure in which a plurality of continuous fiber bundles intersect with each other, and the fiber bundles are preferably bonded at the intersections, as shown in FIG. FIG. 1 shows a so-called triaxial braid having a fiber bundle crossing angle of 60 degrees. As the braid used in the present invention, a biaxial braid (lattice braid), a triaxial braid, or that Any of the above multidimensional braids may be used.

【0010】このような組布を、単繊維が絡み合ったマ
ット状補強繊維を主体とするスタンパブルシートの表層
に配置することで高い曲げ耐力を保有するスタンパブル
シート膨張品が得られる。図2は本発明のスタンパブル
シート膨張品を説明したものである。本発明のスタンパ
ブルシート膨張品は特公平2−48423 号公報において開
示される抄紙法を利用し容易に製造することができる。
即ち、ガラス繊維と粒状の熱可塑性樹脂とからなるウェ
ブを一度調整し、このウェブを挟んだ両側に組布を配
し、これに熱と圧力を加えて繊維間に熱可塑性樹脂を溶
融含浸せしめ、その後冷却してスタンパブルシートを得
る。このスタンパブルシートを任意の倍率で膨張させて
本発明のスタンパブルシート膨張品を得ることができ
る。
By arranging such a braid on the surface layer of a stampable sheet mainly composed of mat-like reinforcing fibers in which single fibers are intertwined with each other, an expanded stampable sheet having a high bending resistance can be obtained. FIG. 2 illustrates an expanded product of the stampable sheet of the present invention. The expanded stampable sheet of the present invention can be easily manufactured by utilizing the papermaking method disclosed in Japanese Patent Publication No. 2-48423.
That is, once a web consisting of glass fibers and granular thermoplastic resin is prepared, a braid is placed on both sides of the web, and heat and pressure are applied to the web to melt and impregnate the thermoplastic resin between the fibers. Then, cool to obtain a stampable sheet. The stampable sheet inflatable product of the present invention can be obtained by inflating this stampable sheet at an arbitrary ratio.

【0011】ここで重要なのは、組布のピッチである。
ピッチとは組布を構成する繊維束の交差間隔のことであ
る。ウェブを熱ロールないしは熱プレスで圧下し、熱可
塑性樹脂を含浸一体化させてスタンパブルシートを得る
際、その圧下力により、マット状補強繊維を構成する単
繊維が組布の繊維束間に入り込んで組布と絡み合い、両
層の密着性を大幅に向上させる。この為、膨張処理を施
しても、表層の組布の繊維束間には強度欠陥となる空隙
が発生しにくくなる。かつ、組布自体は補強効果の高い
連続繊維の束で構成されているため、表層部分の強度は
非常に高い状態を維持されていることになる。しかし、
組布のピッチが3mm未満となるとマット状補強繊維層と
組布層の絡み合いが低下するため両層の剥離が生じ易く
なり、組布層の補強効果を発揮させることができなくな
る。従って、組布のピッチは3mm以上でなければならな
い。
What is important here is the pitch of the braid.
The pitch is an interval between the fiber bundles constituting the braid. When a web is pressed with a hot roll or a hot press to obtain a stampable sheet by impregnating and integrating a thermoplastic resin, the pressing force causes the single fibers constituting the mat-like reinforcing fibers to enter between the fiber bundles of the braid. Entangles with the braid and greatly improves the adhesion of both layers. Therefore, even if the expansion treatment is performed, voids that are strength defects are less likely to occur between the fiber bundles of the surface layer of the braid. Moreover, since the braid itself is composed of a bundle of continuous fibers having a high reinforcing effect, the strength of the surface layer portion is kept extremely high. But,
If the pitch of the braid is less than 3 mm, the entanglement between the mat-like reinforcing fiber layer and the braid layer is reduced, so that both layers are easily peeled off and the reinforcing effect of the braid layer cannot be exerted. Therefore, the pitch of the braid should be 3 mm or more.

【0012】一方、組布のピッチが30mmを超えても、組
布の補強効果が失われる。ピッチが3〜30mmの範囲にあ
れば、たとえマット状繊維補強部に空隙が存在していて
も、曲げ荷重が付与されて空隙で発生する亀裂の進展を
組布がくい止めるからである。ピッチが30mmを越えると
この機能が発揮されなくなる。従って、本発明を構成す
る組布のピッチは3〜30mmの範囲になければならない。
好ましくは5〜15mmの範囲である。
On the other hand, even if the pitch of the braid exceeds 30 mm, the reinforcing effect of the braid is lost. This is because if the pitch is in the range of 3 to 30 mm, even if there are voids in the mat-shaped fiber reinforced portion, the bending load is applied and the braiding blocks the development of cracks generated in the voids. If the pitch exceeds 30 mm, this function will not be exhibited. Therefore, the pitch of the braid constituting the present invention must be in the range of 3 to 30 mm.
It is preferably in the range of 5 to 15 mm.

【0013】補強繊維の含有率は、スタンパブルシート
膨張品の強度を保証するために20〜70重量%必要であ
る。ここでいう補強繊維は、マット状繊維と組布の両者
を含む。特に、マット状繊維層の繊維含有率が20重量%
より大幅に少ない場合、いくら組布層を配置しても補強
効果は発現しない。本発明のスタンパブルシート膨張品
の密度は 0.4〜1.0 の範囲でなければならない。 0.4未
満であれば、いくら表層を組布で補強しても、内部空隙
の強度欠陥としての影響がより強く現われて、補強効果
が発現しない。 1.0超であれば通常のスタンパブルシー
トと何ら差がなくなり、比強度、比剛性の改善につなが
らない。好ましい密度範囲は 0.4〜 0.8である。
The reinforcing fiber content is required to be 20 to 70% by weight in order to guarantee the strength of the expanded stampable sheet. The reinforcing fibers referred to here include both mat-like fibers and braids. Especially, the fiber content of the mat-like fiber layer is 20% by weight.
If it is significantly smaller, no reinforcing effect will be exhibited no matter how many braid layers are arranged. The density of the expandable stampable sheet of the present invention should be in the range of 0.4 to 1.0. If it is less than 0.4, no matter how much the surface layer is reinforced with braid, the effect of the internal voids as a strength defect is more strongly manifested and the reinforcing effect is not exhibited. If it exceeds 1.0, there will be no difference from ordinary stampable sheets, and it will not lead to improvement in specific strength and specific rigidity. The preferred density range is 0.4 to 0.8.

【0014】本発明で使用できる補強繊維としては、ガ
ラス繊維、炭素繊維、アラミド繊維、等が挙げられる
が、コストの面からはガラス繊維が好適である。本発明
に使用できる熱可塑性樹脂としては、例えば、ポリエチ
レン、ポリプロピレン、ポリエチレンテレフタレート、
ポリカーボネート、ポリアミド、ポリアセタール、ポリ
塩化ビニル等、ならびにこれらの樹脂を主成分とする共
重合体やグラフト化合物およびブレンド物、例えばエチ
レン−塩化ビニル共重合体、エチレン−酢酸ビニル共重
合体、スチレン−ブタジエン−アクリロニトリル共重合
体等が挙げられる。
Examples of the reinforcing fiber that can be used in the present invention include glass fiber, carbon fiber, aramid fiber, and the like. From the viewpoint of cost, glass fiber is preferable. Examples of the thermoplastic resin that can be used in the present invention include polyethylene, polypropylene, polyethylene terephthalate,
Polycarbonates, polyamides, polyacetals, polyvinyl chlorides, etc., and copolymers or graft compounds and blends containing these resins as main components, such as ethylene-vinyl chloride copolymers, ethylene-vinyl acetate copolymers, styrene-butadiene. -Acrylonitrile copolymer etc. are mentioned.

【0015】以下、本発明を実施例に基づいて説明す
る。
The present invention will be described below based on examples.

【0016】[0016]

【実施例】【Example】

実施例1 長さ13mm、繊維径10μmのガラス繊維(単繊維分散状
態)44重量%とポリプロピレン樹脂56重量%からなる目
付3000g/m2 のウェブを抄紙法で作製した。次に、ガ
ラス繊維組布(3軸組布、ピッチ: 5.2mm、ガラス繊維
目付:90g/m2 、商品名:KT−111C、日東紡績
製)片面2枚づつでこのウェブを挟み込み、 210℃で予
熱した。その後、25℃の冷却基盤に配置し、20 Kgf/cm2
の圧力でプレスしてガラス繊維にポリプロピレン樹脂を
含浸させ、厚み 2.2mmのスタンパブルシートを得た。こ
のスタンパブルシートのガラス繊維含有率は50重量%、
密度は1.30であった。
Example 1 A web having a basis weight of 3000 g / m 2 made up of 44% by weight of glass fibers (single fiber dispersed state) having a length of 13 mm and a fiber diameter of 10 μm and 56% by weight of polypropylene resin was prepared by a papermaking method. Next, a glass fiber braided fabric (3-axis braided fabric, pitch: 5.2 mm, glass fiber basis weight: 90 g / m 2 , trade name: KT-111C, Nitto Boseki Co., Ltd.) sandwiches the web with two sheets on each side and 210 ° C. Preheated in. Then, it is placed on a cooling base at 25 ° C and 20 Kgf / cm 2
The glass fiber was impregnated with polypropylene resin by pressing under pressure to obtain a stampable sheet with a thickness of 2.2 mm. The glass fiber content of this stampable sheet is 50% by weight,
The density was 1.30.

【0017】このスタンパブルシートを 210℃で再加熱
し、成形後の厚みが5mmとなるように膨張させてスタン
パブルシート膨張品Aを得た。このスタンパブルシート
膨張品Aの密度は0.57である。スタンパブルシート膨張
品Aの中央部から、JIS K7055 に従って曲げ試験片を切
り出し、3点曲げ試験に供した。
This stampable sheet was reheated at 210 ° C. and expanded so that the thickness after molding was 5 mm to obtain a stampable sheet expanded product A. The density of the expanded stampable sheet A is 0.57. A bending test piece was cut out from the center of the expanded stampable sheet A according to JIS K7055 and subjected to a three-point bending test.

【0018】一方、スタンパブルシート膨張品Aの曲げ
耐力改善効果を確認するため、組布層の無いスタンパブ
ルシート膨張品A′を製造した。スタンパブルシート膨
張品A′を構成するガラス繊維は単繊維分散状態で、そ
の長さは13mm、繊維径10μmである。また、ガラス繊維
の含有率はAと同じく50重量%、厚みは5mmで密度も0.
57であった。また曲げ強さは 4.5Kgf/mm2 、曲げ弾性率
は 195 Kgf/mm2であった。
On the other hand, in order to confirm the bending strength improving effect of the stampable sheet expanded product A, a stampable sheet expanded product A'having no assembly layer was manufactured. The glass fiber constituting the expanded stampable sheet A'is a single fiber dispersed state, its length is 13 mm, and fiber diameter is 10 μm. Also, the glass fiber content is 50% by weight, the thickness is 5 mm, and the density is 0.
It was 57. The flexural strength was 4.5 Kgf / mm 2 , and the flexural modulus was 195 Kgf / mm 2 .

【0019】スタンパブルシート膨張品Aの3点曲げ試
験結果を表1に示す。曲げ強さ、ならびに曲げ剛性の値
は、それぞれスタンパブルシート膨張品A′(ブランク
材)に対する曲げ強度、曲げ弾性率の比の値である。 実施例2 長さ13mm、繊維径10μmのガラス繊維(単繊維分散状
態)40重量%とポリプロピレン樹脂60重量%からなる目
付4000g/m2 のウェブを抄紙法で作製した。
Table 1 shows the results of the three-point bending test of the expanded stampable sheet A. The flexural strength and flexural rigidity are the ratio of flexural strength and flexural modulus to the stampable sheet expanded product A '(blank material), respectively. Example 2 A web having a basis weight of 4000 g / m 2 made up of 40% by weight of glass fiber (in a single fiber dispersed state) having a length of 13 mm and a fiber diameter of 10 μm and 60% by weight of polypropylene resin was prepared by a papermaking method.

【0020】次に、ガラス繊維組布(3軸組布、ピッ
チ:10mm、ガラス繊維目付:50g/m 2 )片面2枚づつ
でこのウェブを挟み込み、 210℃で予熱した。その後、
25℃の冷却基盤に配置し、20 Kgf/cm2の圧力でプレスし
てガラス繊維にポリプロピレン樹脂を含浸させ、厚み
2.8mmのスタンパブルシートを得た。このスタンパブル
シートのガラス繊維含有率は43重量%、密度は1.22であ
った。
Next, a glass fiber braid (a triaxial braid, a pick
J: 10 mm, glass fiber basis weight: 50 g / m 2 ) Two on each side
The web was sandwiched between and preheated at 210 ° C. afterwards,
Placed on a cooling base at 25 ℃, 20 Kgf / cm2Press with the pressure of
Glass fiber impregnated with polypropylene resin
A 2.8 mm stampable sheet was obtained. This stampable
Sheet glass fiber content 43% by weight, density 1.22
It was.

【0021】このスタンパブルシートを 210℃で再加熱
し、成形後の厚みが4mmとなるように膨張させてスタン
パブルシート膨張品Bを得た。このスタンパブルシート
膨張品Bの密度は0.85である。スタンパブルシート膨張
品Bの中央部から、JIS K7055 に従って曲げ試験片を切
り出し、3点曲げ試験に供した。
This stampable sheet was reheated at 210 ° C. and expanded so that the thickness after molding was 4 mm to obtain a stampable sheet expanded product B. The density of the expanded stampable sheet B is 0.85. Bending test pieces were cut out from the center of the expanded stampable sheet B according to JIS K7055 and subjected to a three-point bending test.

【0022】一方、実施例1と同じく、スタンパブルシ
ート膨張品Bの曲げ耐力改善効果を確認するため、組布
層の無いスタンパブルシート膨張品B′を製造した。ガ
ラス繊維の含有率はBと同じく43重量%、厚みは5mmで
密度も0.85であった。また曲げ強さは6.2Kgf/mm2、曲げ
弾性率は 295 Kgf/mm2であった。スタンパブルシート膨
張品Bの3点曲げ試験結果を表1に示す。曲げ強さ、な
らびに曲げ剛性の値は、それぞれスタンパブルシート膨
張品B′(ブランク材)に対する曲げ強度、曲げ弾性率
の比の値である。
On the other hand, as in Example 1, in order to confirm the bending strength improving effect of the stampable sheet expanded product B, a stampable sheet expanded product B'having no assembly layer was manufactured. The glass fiber content was 43% by weight as in B, the thickness was 5 mm, and the density was 0.85. The flexural strength was 6.2 Kgf / mm 2 and the flexural modulus was 295 Kgf / mm 2 . Table 1 shows the results of the three-point bending test of the stampable sheet expanded product B. The flexural strength and flexural rigidity are the ratio of flexural strength and flexural modulus to the expanded stampable sheet B '(blank material), respectively.

【0023】[0023]

【表1】 [Table 1]

【0024】[0024]

【発明の効果】本発明によるスタンパブルシート膨張品
は、従来の膨張品より軽量化効果、曲げ耐力に優れる。
よって自動車の内装材やコンクリート型枠等に十分、適
用することができる。
The expanded product of the stampable sheet according to the present invention is superior in weight reduction effect and bending strength to the conventional expanded product.
Therefore, it can be sufficiently applied to interior materials of automobiles, concrete formwork and the like.

【図面の簡単な説明】[Brief description of drawings]

【図1】3軸組布の構造を示す平面図。FIG. 1 is a plan view showing a structure of a triaxial braid.

【図2】本発明の最外層に組布繊維層を配したスタンパ
ブルシート膨張品の断面概略図。
FIG. 2 is a schematic cross-sectional view of an expanded product of a stampable sheet in which a braided fiber layer is arranged as the outermost layer of the present invention.

フロントページの続き (72)発明者 小松 正文 千葉県千葉市中央区川崎町1番地 川崎製 鉄株式会社技術研究本部内 (72)発明者 涌井 正浩 千葉県千葉市中央区川崎町1番地 川崎製 鉄株式会社技術研究本部内Front page continuation (72) Inventor Masafumi Komatsu 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture Kawasaki Steel Co., Ltd. Technical Research Division (72) Inventor Masahiro Wakui 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Kawasaki Steel Technology Research Division, Inc.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 熱可塑性樹脂30〜80重量%と補強繊維20
〜70重量%が一体化して成るスタンパブルシート膨張品
であって、補強繊維が該スタンパブルシートの表層に配
置された組布層とそれらの中間に配置されたマット状の
繊維層で構成され、かつ組布を構成する繊維束のピッチ
が3〜30mmの範囲内であり、密度が 0.4〜 1.0の範囲に
あることを特徴とする曲げ耐力に優れるスタンパブルシ
ート膨張品。
1. A thermoplastic resin 30 to 80% by weight and a reinforcing fiber 20.
An expanded product of a stampable sheet in which about 70% by weight is integrated, and the reinforcing fiber is composed of a braiding layer arranged on the surface layer of the stampable sheet and a mat-like fiber layer arranged in the middle thereof. An expanded stampable sheet having excellent bending resistance, characterized in that the pitch of the fiber bundles constituting the braid is in the range of 3 to 30 mm and the density is in the range of 0.4 to 1.0.
JP2560193A 1993-02-15 1993-02-15 Stampable sheet expanded product excellent in bending yield strength Pending JPH06238659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2560193A JPH06238659A (en) 1993-02-15 1993-02-15 Stampable sheet expanded product excellent in bending yield strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2560193A JPH06238659A (en) 1993-02-15 1993-02-15 Stampable sheet expanded product excellent in bending yield strength

Publications (1)

Publication Number Publication Date
JPH06238659A true JPH06238659A (en) 1994-08-30

Family

ID=12170434

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2560193A Pending JPH06238659A (en) 1993-02-15 1993-02-15 Stampable sheet expanded product excellent in bending yield strength

Country Status (1)

Country Link
JP (1) JPH06238659A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0697275A3 (en) * 1994-08-20 1996-04-17 Basf Ag Fiber reinforced material having high bending stiffness
JP2006247985A (en) * 2005-03-10 2006-09-21 Murata Mach Ltd Thermoplastic frp and its manufacturing method
WO2018199091A1 (en) * 2017-04-28 2018-11-01 株式会社クラレ Laminate composite and method for producing same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0697275A3 (en) * 1994-08-20 1996-04-17 Basf Ag Fiber reinforced material having high bending stiffness
JP2006247985A (en) * 2005-03-10 2006-09-21 Murata Mach Ltd Thermoplastic frp and its manufacturing method
WO2018199091A1 (en) * 2017-04-28 2018-11-01 株式会社クラレ Laminate composite and method for producing same
US11370195B2 (en) 2017-04-28 2022-06-28 Kuraray Co., Ltd. Multilayer composite and method for producing same

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