JPH04208405A - Making method of unidirectionally fiber reinforced thermoplastic resin stampable sheet in paper making manner - Google Patents
Making method of unidirectionally fiber reinforced thermoplastic resin stampable sheet in paper making mannerInfo
- Publication number
- JPH04208405A JPH04208405A JP33926390A JP33926390A JPH04208405A JP H04208405 A JPH04208405 A JP H04208405A JP 33926390 A JP33926390 A JP 33926390A JP 33926390 A JP33926390 A JP 33926390A JP H04208405 A JPH04208405 A JP H04208405A
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- foaming liquid
- fibers
- dispersion
- mesh belt
- 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
- 239000000835 fiber Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 29
- 229920005992 thermoplastic resin Polymers 0.000 title claims abstract description 24
- 239000006185 dispersion Substances 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000005187 foaming Methods 0.000 abstract description 12
- 239000004094 surface-active agent Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- -1 polypropylene Polymers 0.000 description 16
- 239000003365 glass fiber Substances 0.000 description 14
- 239000004743 Polypropylene Substances 0.000 description 12
- 229920001155 polypropylene Polymers 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 7
- 230000000704 physical effect Effects 0.000 description 7
- 239000000843 powder Substances 0.000 description 5
- 239000012783 reinforcing fiber Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 241000723347 Cinnamomum Species 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 235000017803 cinnamon Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 229920006038 crystalline resin Polymers 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Reinforced Plastic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、一方向繊維強化熱可塑性樹脂スタンパブルシ
ートの抄造方法に関するものであり、本発明の抄造方法
より得られたスタンパブルシートは、自動車のバンパー
ビームやドアインパクトビーム等の補強用芯材や一方向
に機械的強度を要求される構造部品として好適に用いら
れる。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for making a unidirectional fiber-reinforced thermoplastic resin stampable sheet, and the stampable sheet obtained by the paper-making method of the present invention includes: It is suitably used as a reinforcing core material for automobile bumper beams, door impact beams, etc., and as structural parts that require mechanical strength in one direction.
［従来の技術］
スタンパブルシートは、その優れた機械的強度、加工性
、量産性から自動車用構造部品を中心に需要が増加して
いる。従来のスタンパブルシートの製造方法は、連続長
繊維からなるマットに熱可塑性樹脂をラミネート含浸さ
せてシート状にするラミネート法と、不連続繊維と熱可
塑性樹脂の繊維または粒子とを分散させマット状にする
方法、あるいはこのマット状物を加熱、加圧、冷却して
シート状にする分散法がよく知られている。[Prior Art] Stampable sheets are in increasing demand mainly for automotive structural parts because of their excellent mechanical strength, workability, and mass productivity. Conventional methods for manufacturing stampable sheets include the lamination method, in which a mat made of continuous fibers is laminated and impregnated with thermoplastic resin to form a sheet, and the other method is to form a mat by dispersing discontinuous fibers and thermoplastic resin fibers or particles. A dispersion method in which this mat-like material is heated, pressurized, and cooled to form a sheet is well known.
前者の例としては、ガラス織布に熱可塑性樹脂を積層す
る特開昭４８−６１７６８号公報、樹脂シートとガラス
繊維マットとをエンドレスベルトで積層する特開昭５５
−７７５２５号公報さらにはガラス繊維マットを樹脂で
サンドイッチして一対の加熱加圧盤で積層する特開昭５
６−１４２０３６号公報の方法などが挙げられ、また後
者の例としては、ポリプロピレンにガラス繊維とバルブ
状のポリプロピレン繊維を混合する特公昭５１−４７７
５２号公報、樹脂粉末と不連続ガラス繊維よりなるマッ
トを加熱加圧する特開昭５６−１１２２９号公報、樹脂
粉末、ガラス繊維、ポリオレフィンパルプ、ラテックス
及び凝集剤を含むことを特徴とする特開昭５７−２８１
３５号公報及び樹脂粉末、ガラス繊維、ラテックスバイ
ンダー及び凝集剤を含むことを特徴とする特開昭５８−
５９２２４号公報の方法などが知られている。これらの
方法にて製造されたスタンパブルシートは、強化繊維が
成形品中に均一に分散し、成形品各部の強度及び寸法精
度が安定している。しかし、製品の要求性能として更に
高強度、高剛性のものやバンパービームのように長手方
向に高い機械的強度を必要とする場合もある。これらの
要求に対し、強化繊維の含有量を増加させる方法や、強
化繊維を均一に分散させた層に一方向に引き揃えた連続
繊維を加える特開昭６２−２４０５１４号公報なとの方
法力ｊ用し１られている。Examples of the former include JP-A No. 48-61768, in which a thermoplastic resin is laminated on a glass woven fabric, and JP-A-55, in which a resin sheet and a glass fiber mat are laminated with an endless belt.
-77525 Publication Furthermore, Japanese Patent Application Laid-Open No. 5-77525 discloses sandwiching glass fiber mats with resin and laminating them using a pair of heating and pressing plates.
Examples of the latter include the method disclosed in Japanese Patent Publication No. 51-477, in which glass fibers and bulb-shaped polypropylene fibers are mixed with polypropylene.
No. 52, JP-A-56-11229, in which a mat made of resin powder and discontinuous glass fibers is heated and pressed; 57-281
No. 35 and JP-A-58-1, which is characterized in that it contains resin powder, glass fiber, latex binder, and flocculant.
A method such as that disclosed in Japanese Patent No. 59224 is known. In the stampable sheets produced by these methods, the reinforcing fibers are uniformly dispersed in the molded product, and the strength and dimensional accuracy of each part of the molded product are stable. However, the required performance of the product may require even higher strength and rigidity, or higher mechanical strength in the longitudinal direction, such as a bumper beam. In response to these demands, methods such as increasing the content of reinforcing fibers and adding continuous fibers aligned in one direction to a layer in which reinforcing fibers are uniformly dispersed have been proposed, as disclosed in Japanese Patent Application Laid-Open No. 62-240514. It is used for j.
しかしなから、強化繊維の含有量を増加させる方法では
、含有効果の発現率か小さしｓ上に成升ニ性の低下を生
しるという問題かある。また、強イし繊維を均一に分散
させた層に一方向に引き揃えた連続繊維を加える方法で
は、強化させた方向への成形流動性の低下や層間剥離に
よる曲Ｇず、圧縮特性の低下のため要求性能を満足し得
なＬＴＮとし１う問題がある。However, in the method of increasing the reinforcing fiber content, there is a problem in that the expression rate of the effect of the inclusion is small and the growth property is reduced. In addition, in the method of adding continuous fibers aligned in one direction to a layer in which reinforcing fibers are uniformly dispersed, there is a decrease in molding fluidity in the reinforced direction, deterioration of bending due to delamination, and a decrease in compressive properties. Therefore, there is a problem in creating an LTN that cannot satisfy the required performance.
［発明が解決しようとする課題］
本発明の目的は、不連続繊維を一方向に配向させること
により、配向方向に対し高５ｓ機械的強度を有するスタ
ンパブルシートを製造する方法を提供することである。[Problems to be Solved by the Invention] An object of the present invention is to provide a method for producing a stampable sheet having high 5s mechanical strength in the orientation direction by orienting discontinuous fibers in one direction. be.
［課題を解決するための手段］
本発明は、不連続繊維と熱可塑性樹脂のｔ混合層を抄造
する方法において、不連続繊維と熱可塑性樹脂の発泡分
散液を形成後、発泡分散液を、ヘッドボックスを通して
移動するメツシュベルト上に供給し、発泡分散液の供給
される反対側から負圧を付加し、発泡分散液の液体をメ
ツシュヘルド及び排水口を介して排水し、メツシュヘル
ド上に不連続繊維と熱可塑性樹脂の混合層を抄造する工
程にて、ヘッドボックス内を高さ方向に多段とし、一段
の高さが不連続繊維長の０．２〜１．０倍としたヘッド
ボックスを用いて発泡性分散液の流路を分割して、移動
するメツシュベルト上に供給することによる一方向繊維
強化熱可塑性樹脂スタンンバブルシートの抄造方法であ
る。[Means for Solving the Problems] The present invention provides a method for paper-making a t-mixed layer of discontinuous fibers and thermoplastic resin, in which after forming a foamed dispersion of discontinuous fibers and thermoplastic resin, the foamed dispersion is The foamed dispersion is fed onto the mesh belt moving through the head box, negative pressure is applied from the opposite side to which the foamed dispersion is fed, the foamed dispersion liquid is drained through the meshheld and the drain port, and the discontinuous fibers and the foamed dispersion are discharged onto the meshheld. In the process of paper-making a mixed layer of thermoplastic resin, foaming is performed using a headbox with multiple stages in the height direction, with each stage having a height of 0.2 to 1.0 times the length of the discontinuous fibers. This is a method for making a unidirectional fiber-reinforced thermoplastic resin stamped bubble sheet by dividing the flow path of a thermoplastic dispersion liquid and feeding it onto a moving mesh belt.
本発明の一方向繊維強化熱可塑性樹脂スタンパブルシー
トの抄造方法を第１．２図に従い、詳細に説明する。The method for making a unidirectional fiber-reinforced thermoplastic resin stampable sheet of the present invention will be explained in detail with reference to FIG. 1.2.
不連続繊維と熱可塑性樹脂等をディスバージョンタンク
１にて界面活性剤を含む水等の発泡液中に分散混合し、
その発泡分散液はヘッドボックス２を通過させる。本発
明のヘッドボックス２内は高さ方向に多段とし、一段の
高さが不連続繊維長の０．２〜１．０倍の高さを有する
流路に分割されている。分割された発泡分散液は、メツ
シュヘルド３上に抄き出される。このメツシュベルト３
の下部に排水口４が設置されており、発泡シナ散液の液
体はメツシュヘルド３及び排水口４より負圧により排水
される。発泡液を排水した不連続繊維と熱可塑性樹脂の
混合層は乾燥機５により乾燥され、必要に応じて加熱プ
レス６し緻密なシートに成形される。ここで、ヘッドホ
ックス２内の一段の高さは、全て同一である必要はなく
、不連続繊維長の０．２〜１．０倍の範囲であればどの
様な組み合わせを用いても良い。また、ヘッドボックス
２内の一段の高さは、発泡性分散液の入り側から出側ま
で均一である必要はなく、不連続繊維長の０．２〜１．
０倍の範囲であれば良い。Discontinuous fibers, thermoplastic resin, etc. are dispersed and mixed in a foaming liquid such as water containing a surfactant in a dispersion tank 1.
The foamed dispersion is passed through a head box 2. The inside of the head box 2 of the present invention is divided into multiple stages in the height direction, and each stage has a height of 0.2 to 1.0 times the length of the discontinuous fibers. The divided foamed dispersion is poured onto a meshheld 3. This mesh belt 3
A drain port 4 is installed at the lower part of the drain port 4, and the liquid of the foamed cinnamon dispersion is drained from the meshheld 3 and the drain port 4 by negative pressure. The mixed layer of discontinuous fibers and thermoplastic resin from which the foaming liquid has been drained is dried by a drier 5, and if necessary, heated by a hot press 6 to be formed into a dense sheet. Here, the heights of the steps in the head hox 2 do not have to be all the same, and any combination may be used as long as it is within the range of 0.2 to 1.0 times the length of the discontinuous fibers. Further, the height of each step in the head box 2 does not need to be uniform from the inlet side to the outlet side of the foamable dispersion liquid, and is 0.2 to 1 height of the discontinuous fiber length.
It is sufficient if it is within the range of 0 times.
本発明によれば、発泡分散液が高さ方向に分割されたヘ
ッドボックス２を通過する際に、発泡分散液の流動は層
流となるために不連続繊維は流動方向に配向する。この
混合層を加熱プレスし、−方向強化熱可塑性樹脂スタン
パブルシートが得られる。ヘットボックス２内の一段の
高さが不連続繊維長の１．０倍を越える場合、発泡分散
液の流動は層流とはならず、中央部分は流動方向に直角
に配向する作用が働き、不連続繊維を一方向に配向させ
る効果は失われる。また、ヘッドボックス２内の一段の
高さが不連続繊維長の０．２倍未満の場合、不連続繊維
間の干渉が大きくなり、分散の均一性が損なわれたり、
流路に詰まりを生じ、発泡分散液の流動か困難となる。According to the present invention, when the foamed dispersion passes through the head box 2 divided in the height direction, the flow of the foamed dispersion becomes a laminar flow, so that the discontinuous fibers are oriented in the flow direction. This mixed layer is heated and pressed to obtain a -direction reinforced thermoplastic resin stampable sheet. If the height of one step in the head box 2 exceeds 1.0 times the length of the discontinuous fibers, the flow of the foamed dispersion will not be laminar, and the central portion will be oriented perpendicular to the flow direction. The effect of orienting discontinuous fibers in one direction is lost. Furthermore, if the height of one step in the head box 2 is less than 0.2 times the length of the discontinuous fibers, interference between the discontinuous fibers will increase, and the uniformity of dispersion may be impaired.
The flow path becomes clogged, making it difficult for the foamed dispersion to flow.
本発明における不連続繊維としては、ガラス、金属、炭
素繊維等の無機繊維または有機繊維等が挙げられ、これ
らを単独にて用いても、２種類以上の組み合わせにて用
いてもよい。これらの不連続繊維の長さは３〜５０Ｉｉ
Ｉ１１であることが好ましく、より好ましくは６〜２５
ＩＤＩ１１である。不連続繊維の長さか５０ｍｍを越え
ると不連続繊維間の干渉により、繊維の直線性が得られ
にくく、機械的強度の補強効果が低下する。また、不連
続繊維の長さが３ＩｎＩ１１より短い場合、充分な機械
的強度は得られない。Examples of the discontinuous fibers in the present invention include inorganic fibers or organic fibers such as glass, metal, and carbon fibers, and these may be used alone or in combination of two or more types. The length of these discontinuous fibers is 3-50Ii
I11 is preferable, more preferably 6-25
It is IDI11. When the length of the discontinuous fibers exceeds 50 mm, it is difficult to obtain straightness of the fibers due to interference between the discontinuous fibers, and the effect of reinforcing mechanical strength is reduced. Furthermore, if the length of the discontinuous fibers is shorter than 3InI11, sufficient mechanical strength cannot be obtained.
これらの不連続繊維は、同一の長さのものを単独にて用
いても、長さの異なるものを併用してもよい。また、こ
れらの不連続繊維は単繊維状、繊維束状の何れでもよく
、それらの組み合わせにて用いてもよい。These discontinuous fibers may have the same length alone or may have different lengths in combination. Further, these discontinuous fibers may be in the form of a single fiber or a bundle of fibers, or a combination thereof may be used.
本発明における熱可塑性樹脂としては、ポリプロピレン
、ポリアミド、ポリエチレンテレフタレート、ポリブチ
レンテレフタレート、ポリスチレン、ポリエチレン、ポ
リカーボネート及びこれらの変性体やポリマーブレンド
、ポリマーアロイ等が挙げられる。また、これらの２種
類以上の組み合わせにて用いてもよい。特に繊維強化に
よる補強効果の著しい結晶性樹脂が好ましい。熱可塑性
樹脂の形態はパウダー、フレーク、繊維等が用いられる
。Examples of the thermoplastic resin in the present invention include polypropylene, polyamide, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, polycarbonate, modified products thereof, polymer blends, polymer alloys, and the like. Furthermore, a combination of two or more of these may be used. In particular, crystalline resins that have a remarkable reinforcing effect due to fiber reinforcement are preferred. The thermoplastic resin may be in the form of powder, flakes, fibers, etc.
本発明における不連続繊維と熱可塑性樹脂の混合層にお
ける不連続繊維の割合は２０〜７０重量％であることが
好ましい。更に好ましくは、３０〜５０重量％である。In the present invention, the proportion of discontinuous fibers in the mixed layer of discontinuous fibers and thermoplastic resin is preferably 20 to 70% by weight. More preferably, it is 30 to 50% by weight.
不連続繊維の割合が７０重量％を越える場合、成形流動
性の低下が著しく、２０重量％より小さい場合、成形時
に樹脂の流動のため、繊維の配向性や直線性が損なわれ
る。When the proportion of discontinuous fibers exceeds 70% by weight, the molding fluidity is significantly reduced, and when it is less than 20% by weight, the orientation and linearity of the fibers are impaired due to flow of the resin during molding.
また、本発明の一方向繊維強化熱可塑性樹脂スタンパブ
ルシートに対し、タルク等の強化材、充填剤、核剤、難
燃剤、顔料、安定剤、可塑剤、滑剤等の添加剤を配合す
ることができる。Additionally, additives such as reinforcing materials such as talc, fillers, nucleating agents, flame retardants, pigments, stabilizers, plasticizers, and lubricants may be added to the unidirectional fiber-reinforced thermoplastic resin stampable sheet of the present invention. I can do it.
［実施例コ
以下、実施例及び比較例により、本発明を具体的に説明
する。[Example] Hereinafter, the present invention will be specifically explained with reference to Examples and Comparative Examples.
実施例１
第１図に示した工程に基づき、一段の高さを３ｍｍとし
、４分割したヘッドボックスを用いて抄造を行った。デ
ィスバージョンタンク１にて、界面活性剤を含む水を攪
拌し、３倍の体積に発泡させた。この発泡液中に長さ１
３＋＊＋＊のガラス繊維３０重量％とポリプロピレンパ
ウダー７０重量％を加え分散混合した。その発泡分散液
をヘッドボックス２を通してメツシュベルト３上に抄き
出し、発泡液はメツシュベルト３及び排水口４より負圧
により排水させた。発泡液を排水したガラス繊維とポリ
プロピレンパウダーの混合層を乾燥機５により乾燥後、
加熱プレス６にてプレスしスタンパブルシートを得た。Example 1 Based on the process shown in FIG. 1, papermaking was carried out using a head box divided into four parts, each with a height of 3 mm. In the dispersion tank 1, water containing a surfactant was stirred and foamed to three times its volume. In this foaming liquid, a length of 1
30% by weight of glass fiber of 3+**+* and 70% by weight of polypropylene powder were added and dispersed and mixed. The foamed dispersion liquid was extracted onto the mesh belt 3 through the head box 2, and the foamed liquid was drained from the mesh belt 3 and the drain port 4 under negative pressure. After drying the mixed layer of glass fiber and polypropylene powder from which the foaming liquid has been drained using the dryer 5,
It was pressed using a heating press 6 to obtain a stampable sheet.
得られたスタンパブルシートを発泡分散液の流動方向（
Ｌ方向）及びその直角方向（Ｃ方向）に試験片を切り出
し、ＪＩＳ Ｋ７１１３ 、 ＪＩＳ Ｋ７１１０ 、
ＪＩＳ Ｋ７２０３に準拠して引張強度、アイゾツト
衝撃強度、曲げ弾性率を各々測定した。その結果を表１
に示す。表１の結果から、本発明の抄造方法によるスタ
ンパブルシートは、Ｌ方向に高い機械的強度を有するこ
とが明らかである。The obtained stampable sheet was placed in the flow direction of the foamed dispersion (
A test piece was cut out in the L direction) and in the direction perpendicular to it (C direction), and JIS K7113, JIS K7110,
Tensile strength, Izot impact strength, and flexural modulus were each measured in accordance with JIS K7203. Table 1 shows the results.
Shown below. From the results in Table 1, it is clear that the stampable sheet produced by the papermaking method of the present invention has high mechanical strength in the L direction.
比較例１
第１図に示した工程に基づき、高さ２０ａ＋ｍのヘッド
ボックスを用いて、長さ１３ｍｍのガラス繊＠３０重量
％とポリプロピレン７０重量％のスタンパブルシートを
得た。得られたスタンパブルシートの物性を評価した結
果を表１に示す。Comparative Example 1 Based on the process shown in FIG. 1, a stampable sheet having a length of 13 mm and containing 30% by weight of glass fiber and 70% by weight of polypropylene was obtained using a head box having a height of 20 a+m. Table 1 shows the results of evaluating the physical properties of the obtained stampable sheet.
実施例２
実施例１と同様な方法にて、長さ１３ＩＩＩＩｌのガラ
ス繊維４０重量％とポリプロピレン６０重量％のスタン
パブルシートを得た。得られたスタンパブルシートの物
性を評価した結果を表１に示す。表１の結果から、本発
明の抄造方法によるスタンパブルシ−トは、Ｌ方向に高
い機械的強度を有することが明らかである。Example 2 A stampable sheet of 40% by weight glass fiber and 60% by weight polypropylene and having a length of 13IIII was obtained in the same manner as in Example 1. Table 1 shows the results of evaluating the physical properties of the obtained stampable sheet. From the results in Table 1, it is clear that the stampable sheet produced by the papermaking method of the present invention has high mechanical strength in the L direction.
比較例２
比較例１と同様な方法にて、長さ１３ｍｌ１のガラス繊
維４０重量％とポリプロピレン６０重量％のスタンパブ
ルシートを得た。得られたスタンパブルシートの物性を
評価した結果を表１に示す。Comparative Example 2 A stampable sheet having a length of 13 ml and containing 40% by weight of glass fiber and 60% by weight of polypropylene was obtained in the same manner as in Comparative Example 1. Table 1 shows the results of evaluating the physical properties of the obtained stampable sheet.
実施例３
第１図に示した工程に基づき、一段の高さを１５ｍｌ１
とし、２分割したヘッドボックスを用いて抄造を行い、
長さ２５ｍ朧のガラス繊維３０重量％とポリプロピレン
７０重量％のスタンパブルシートを得た。Example 3 Based on the process shown in Figure 1, the height of one step was 15ml1.
Then, papermaking was carried out using a head box divided into two parts.
A stampable sheet having a length of 25 m and containing 30% by weight of glass fiber and 70% by weight of polypropylene was obtained.
得られたスタンパブルシートの物性を評価した結果を表
１に示す。表１の結果から、本発明の抄造方法によるス
タンパブルシートは、Ｌ方向に高い機械的強度を有する
ことが明らかである。Table 1 shows the results of evaluating the physical properties of the obtained stampable sheet. From the results in Table 1, it is clear that the stampable sheet produced by the papermaking method of the present invention has high mechanical strength in the L direction.
比較例３
第１図に示した工程に基づき、高さ３０ａ＋＋ａのヘッ
ドボックスを用いて、長さ２５＋ｕ＋のガラス繊維３０
重量％とポリプロピレン７０重量％のスタンパブルシー
トを得た。得られたスタンパブルシートの物性を評価し
た結果を表１に示す。Comparative Example 3 Based on the process shown in FIG. 1, using a head box with a height of 30a++a, glass fiber 30 with a length of 25
A stampable sheet containing 70% by weight of polypropylene was obtained. Table 1 shows the results of evaluating the physical properties of the obtained stampable sheet.
実施例４
実施例３と同様な方法にて、長さ２５ｍ５のガラス繊維
４０重量％とポリプロピレン６０重量％のスタンパブル
シートを得た。得られたスタンパブルシートの物性を評
価した結果を表１に示す。表１の結果から、本発明の抄
造方法によるスタンパブルシートは、Ｌ方向に高い機械
的強度を有することか明らかである。Example 4 A stampable sheet having a length of 25 m5 and containing 40% by weight of glass fiber and 60% by weight of polypropylene was obtained in the same manner as in Example 3. Table 1 shows the results of evaluating the physical properties of the obtained stampable sheet. From the results in Table 1, it is clear that the stampable sheet produced by the papermaking method of the present invention has high mechanical strength in the L direction.
比較例４
比較例３と同様な方法にて、長さ２５＋ｍのガラス繊維
４０重量％とポリプロピレン６０重量％のスタンパブル
シートを得た。得られたスタンパブルシートの物性を評
価した結果を表１に示す。Comparative Example 4 In the same manner as in Comparative Example 3, a stampable sheet having a length of 25+ m and containing 40% by weight of glass fiber and 60% by weight of polypropylene was obtained. Table 1 shows the results of evaluating the physical properties of the obtained stampable sheet.
［発明の効果コ
本発明により、不連続繊維が流動方向に配向した混合層
の抄造が可能となり、そのスタンパブルシートは配向方
向に対し高い機械的強度を有し、自動車のバンパービー
ムやドアインパクトビーム等の長尺部材等、特定方向に
高い強度を要求される部材のスタンピング成形用材料と
して極めて有用である。[Effects of the invention] The present invention makes it possible to fabricate a mixed layer in which discontinuous fibers are oriented in the flow direction, and the stampable sheet has high mechanical strength in the orientation direction, making it suitable for automobile bumper beams and door impacts. It is extremely useful as a stamping material for long members such as beams that require high strength in a specific direction.
第１図は本発明の一方向繊維強化熱可塑性スタンパブル
シートの抄造方法の概略図である。
第２図は本発明の一方向繊維強化熱可塑性スタンパプル
シートの抄造方法におけるヘッドボックスの概略図であ
る。一部分、内部構造を示した。
１・・・ディスバージョンタンク、２・−ヘッドボック
ス、３・・・メツシュベルト、４・・・排水口、５・−
・乾燥機、６・・・加熱プレス、ａ−・ヘッドボックス
の幅、ｂ・・・ヘッドボックスの分割した一段の高さ、
Ｃ・・・ヘットボックスの高さ、ｄ・・・ヘッドボック
スの長さ。FIG. 1 is a schematic diagram of a method for producing a unidirectional fiber-reinforced thermoplastic stampable sheet of the present invention. FIG. 2 is a schematic diagram of a head box in the method for making a unidirectional fiber-reinforced thermoplastic stamped sample sheet of the present invention. Part of the internal structure is shown. 1...Disversion tank, 2...Head box, 3...Mesh belt, 4...Drain port, 5...-
・Dryer, 6...Heating press, a--Width of the head box, b...Height of each divided head box,
C: Height of the head box, d: Length of the head box.
Claims (1)
において、不連続繊維と熱可塑性樹脂の発泡分散液を形
成後、発泡分散液を、ヘッドボックスを通して移動する
メッシュベルト上に供給し、発泡分散液の供給される反
対側から負圧を付加し、発泡分散液の液体をメッシュベ
ルト及び排水口を介して排水し、メッシュベルト上に不
連続繊維と熱可塑性樹脂の混合層を抄造する工程にて、
ヘッドボックス内を高さ方向に多段とし、一段の高さが
不連続繊維長の０．２〜１．０倍としたヘッドボックス
を用いて発泡分散液の流路を分割して、移動するメッシ
ュベルト上に供給することを特徴とする一方向繊維強化
熱可塑性樹脂スタンパブルシートの抄造方法。1. In a method for papermaking a mixed layer of discontinuous fibers and thermoplastic resin, after forming a foamed dispersion of discontinuous fibers and thermoplastic resin, the foamed dispersion is supplied onto a mesh belt moving through a head box, Negative pressure is applied from the side opposite to where the foamed dispersion is supplied, and the foamed dispersion liquid is drained through the mesh belt and the drain port to form a mixed layer of discontinuous fibers and thermoplastic resin on the mesh belt. In the process,
The inside of the headbox is multi-staged in the height direction, and the height of each stage is 0.2 to 1.0 times the length of the discontinuous fiber.The headbox is used to divide the flow path of the foamed dispersion liquid and create a moving mesh. A method for making a stampable sheet of a unidirectional fiber-reinforced thermoplastic resin, characterized in that it is supplied on a belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33926390A JPH04208405A (en) | 1990-11-30 | 1990-11-30 | Making method of unidirectionally fiber reinforced thermoplastic resin stampable sheet in paper making manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33926390A JPH04208405A (en) | 1990-11-30 | 1990-11-30 | Making method of unidirectionally fiber reinforced thermoplastic resin stampable sheet in paper making manner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04208405A true JPH04208405A (en) | 1992-07-30 |
Family
ID=18325797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33926390A Pending JPH04208405A (en) | 1990-11-30 | 1990-11-30 | Making method of unidirectionally fiber reinforced thermoplastic resin stampable sheet in paper making manner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04208405A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016121136A1 (en) * | 2015-01-29 | 2016-08-04 | 王子ホールディングス株式会社 | Sheet for fiber-reinforced plastic molded body |
-
1990
- 1990-11-30 JP JP33926390A patent/JPH04208405A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016121136A1 (en) * | 2015-01-29 | 2016-08-04 | 王子ホールディングス株式会社 | Sheet for fiber-reinforced plastic molded body |
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