JP2853205B2 - Thermoplastic composite molding sheet - Google Patents
Thermoplastic composite molding sheetInfo
- Publication number
- JP2853205B2 JP2853205B2 JP25618889A JP25618889A JP2853205B2 JP 2853205 B2 JP2853205 B2 JP 2853205B2 JP 25618889 A JP25618889 A JP 25618889A JP 25618889 A JP25618889 A JP 25618889A JP 2853205 B2 JP2853205 B2 JP 2853205B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- sheet
- thermoplastic composite
- present
- composite molding
- 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.)
- Expired - Fee Related
Links
Landscapes
- Reinforced Plastic Materials (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は補強繊維に熱可塑性樹脂マトリックスが均一
に含浸した複雑形状の成形体を簡易に作りうる熱可塑性
コンポジット成形用シートに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sheet for thermoplastic composite molding capable of easily producing a complex-shaped molded article in which a thermoplastic resin matrix is uniformly impregnated into reinforcing fibers.
従来本分野の商品としてはバルクでルーズな状態の連
続したガラス繊維マットに溶融ポリマーを含浸させて作
られたいわゆるスタンパブルシートがある。Conventionally, as a product in this field, there is a so-called stampable sheet made by impregnating a molten glass with a continuous glass fiber mat in a loose state.
スタンパブルシートの溶融含浸工程においては、マト
リックスとなるポリマーを溶融した状態で、ある一定時
間加圧してやる必要がある。このため、工程が複雑にな
り設備費が非常に高くなってしまう。また、成形時、連
続ガラス繊維はポリマーと共に流動することが困難で、
たとえば、リブ部分などにはガラス繊維が十分には流れ
込まない傾向が強い。In the step of melt-impregnating a stampable sheet, it is necessary to pressurize the polymer serving as a matrix in a molten state for a certain period of time. For this reason, the process becomes complicated and the equipment cost becomes extremely high. Also, at the time of molding, continuous glass fiber is difficult to flow with the polymer,
For example, there is a strong tendency that the glass fibers do not sufficiently flow into the ribs and the like.
本発明では極めて簡易な工程で成形用シートが作れる
こと、ならびに成形時に補強用繊維がポリマーと共に容
易に流動し、成形品中の補強繊維の偏在が極めて少い熱
可塑性コンポジット成形用シートを提供しようとするも
のである。In the present invention, it is possible to provide a sheet for forming a thermoplastic composite, in which a sheet for forming can be produced by an extremely simple process, and reinforcing fibers easily flow together with a polymer during forming, and uneven distribution of reinforcing fibers in a molded article is extremely small. It is assumed that.
本発明は、補強繊維と熱可塑性繊維とからなる混繊糸
の切断物を集合一体化して得られた熱可塑性コンポジッ
ト成形用シートである。The present invention is a sheet for forming a thermoplastic composite, which is obtained by assembling and integrating cuts of a mixed fiber consisting of reinforcing fibers and thermoplastic fibers.
本発明における補強繊維とは、カーボン繊維、ガラス
繊維、パラ型アラミド繊維等の連続フイラメントを指す
がこれらに限定されるわけではない。熱可塑性樹脂繊維
とは、これを溶融含浸後には成形品コンポジットのマト
リックス成分になるもので、ナイロン６、ナイロン66、
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、ポリプロピレン、ポリフュニレンサルファイド、
ポリカーボネート、ポリエーテルエーテルケトン、ポリ
エーテルイミド等の連続フイラメントを指すが、これら
に限定されるわけでない。混繊糸とは、単糸レベルで２
種以上の連続フイラメントが糸断面からみて互いに混じ
り合っている糸であり、本発明では補強繊維と熱可塑性
樹脂繊維とから構成されている。その製法としては種々
の方法が挙げられるが、例えばガラス繊維（補強繊維）
とナイロン繊維（熱可塑性樹脂繊維）の場合、空気噴出
流を用いたいわゆるタスラン法等によって混繊すること
ができる。本発明では。上記の混繊糸を所定の長さに切
断し、これを集合一体化して成形用シートを作る。The reinforcing fiber in the present invention refers to a continuous filament such as a carbon fiber, a glass fiber, and a para-aramid fiber, but is not limited thereto. The thermoplastic resin fiber is a matrix component of a molded product composite after being melt-impregnated, and nylon 6, nylon 66,
Polyethylene terephthalate, polybutylene terephthalate, polypropylene, polyfunylene sulfide,
Refers to continuous filaments such as, but not limited to, polycarbonate, polyetheretherketone, and polyetherimide. Mixed yarn is 2 at the single yarn level.
At least one kind of continuous filament is a yarn mixed with each other as viewed from the yarn cross section. In the present invention, the yarn is composed of a reinforcing fiber and a thermoplastic resin fiber. Various methods can be cited as its production method.
And nylon fibers (thermoplastic resin fibers), the fibers can be mixed by the so-called Taslan method using an air jet. In the present invention. The mixed fiber is cut into a predetermined length, and the cut yarn is collected and integrated to form a forming sheet.
切断された混繊糸の長さは10〜200mmが好ましく、さ
らに好ましくは20〜100mmである。集合一体化してシー
トを作成する方法は種々挙げられるが、たとえば切断し
た混繊糸が、面的に一様に分布するよう振り落した後、
これを熱可塑性樹脂の融点以上の温度にもで予熱した後
コールドローラーでプレスすることによって得られる。
本発明では補強繊維と熱可塑性樹脂繊維との混繊糸を使
っているので、単繊維の単位のレベルで両者の混合が行
われている。したがって、本シートを用いて成形する場
合、本シートをマトリックスとなる熱可塑性樹脂の溶融
状態で圧縮成形を行う（以下、この成形をフロースタン
ピングと称する）間にマトリックスの補強繊維間の含浸
が完遂される。したがって、従来のいわゆるスタンパブ
ルシートの製造に要する高価な溶融含浸設備が不要にな
る。The length of the cut mixed fiber is preferably from 10 to 200 mm, more preferably from 20 to 100 mm. There are various methods for preparing a sheet by assembling and integrating, for example, after the cut mixed fiber is shaken down so as to be uniformly distributed in a plane,
This can be obtained by preheating this at a temperature higher than the melting point of the thermoplastic resin and then pressing it with a cold roller.
In the present invention, since the mixed fiber of the reinforcing fiber and the thermoplastic resin fiber is used, the both are mixed at the unit level of the single fiber. Therefore, when molding using the present sheet, the impregnation between the reinforcing fibers of the matrix is completed during compression molding of the present sheet in a molten state of the thermoplastic resin serving as the matrix (hereinafter, this molding is referred to as flow stamping). Is done. Therefore, expensive melt impregnation equipment required for manufacturing a conventional so-called stampable sheet is not required.
また混繊糸においては補強繊維とマトリックス樹脂と
の割合は高い精度で一定に保たれているので、成形シー
トにおける補強繊維とマトリックス樹脂の比率の場所的
な変動は極めて少ない。さらに補強繊維は適当な長さに
切断されているので、フロースタンピング過程での補強
繊維とマトリックス樹脂間の解離はほとんど生じない。
したがって、成形品中への補強繊維の偏在は極めて少な
く保たれる。In the mixed fiber, the ratio between the reinforcing fiber and the matrix resin is kept constant with high accuracy, and therefore, the spatial variation in the ratio between the reinforcing fiber and the matrix resin in the molded sheet is extremely small. Furthermore, since the reinforcing fibers are cut to an appropriate length, there is almost no dissociation between the reinforcing fibers and the matrix resin during the flow stamping process.
Therefore, the uneven distribution of the reinforcing fibers in the molded article is kept extremely small.
以下、実施例により本発明を説明する。 Hereinafter, the present invention will be described with reference to examples.
補強用繊維としてＥ−ガラス繊維、熱可塑性樹脂繊維
として160℃熱収縮率２％のポリプロピレン繊維を39対6
1重量％の割合で組み合わされた1180texの混繊糸を45mm
づつの長さに切断しつつ、面的に均一に分布するよう振
り落とした。これを240℃の温度になるまで赤外線ヒー
ターで２分間加熱した後、常温に保たれたロール間でプ
レス処理し、厚み5.1mm、目付け3.10kg/m2の成形用シー
トが得られた。E-glass fiber as a reinforcing fiber and polypropylene fiber having a heat shrinkage of 2% at 160 ° C. as a thermoplastic resin fiber are 39: 6.
45mm 1180tex mixed fiber yarn combined at 1% by weight
While being cut into individual lengths, they were shaken down so as to be uniformly distributed over the surface. This was heated with an infrared heater for 2 minutes to a temperature of 240 ° C., and then pressed between rolls kept at room temperature to obtain a molding sheet having a thickness of 5.1 mm and a basis weight of 3.10 kg / m 2 .
本シートを用いて第１図に示す形状のリブ付成形品
（300×200×50）をフロースタンピングによって得た。
同じ金型で市販のポリプロピレン（実測重量比59.6％）
とＥ−ガラス繊維の連続マットからなるスタンパブルシ
ートを同一条件でフロースタンピング成形した。第１図
のリブの中心で、かつ上部より15mmの距離のＡ〜Ｄ点で
のＥ−ガラス繊維の含有率を実測したところ、本発明品
による成形物では、37.5±３重量％であった。これに対
して市販スタンパブルシートからの成形品では、125.2
±8.8重量％であった。これは本発明品による成形物で
は補強繊維の偏在が極めて少いことを示している。Using this sheet, a molded product with ribs (300 × 200 × 50) having the shape shown in FIG. 1 was obtained by flow stamping.
Commercially available polypropylene in the same mold (59.6% of actual weight ratio)
And a stampable sheet comprising a continuous mat of E-glass fiber were flow stamped under the same conditions. The E-glass fiber content at points A to D at the center of the rib in FIG. 1 and at a distance of 15 mm from the top was measured, and it was 37.5 ± 3% by weight in the molded product of the present invention. . On the other hand, for molded products from commercially available stampable sheets, 125.2
It was ± 8.8% by weight. This indicates that the uneven distribution of the reinforcing fibers is extremely small in the molded article of the present invention.
本発明の熱可塑性コンポジット成形用シートは、切断
した混繊糸を使用するため、従来のスタンパブルシート
の製造に要するような高価な溶融含浸設備が不要で、極
めて簡単に製造することができるのみならず、補強繊維
とマトリックス繊維との割合が高い精度で一定で、かつ
均一にすることができるという優れた特徴を有するもの
である。Since the thermoplastic composite molding sheet of the present invention uses the cut mixed fiber yarn, it does not require expensive melt impregnation equipment required for the production of the conventional stampable sheet, and can be produced only extremely easily. Rather, it has an excellent feature that the ratio between the reinforcing fibers and the matrix fibers can be made constant and uniform with high accuracy.
第１図は本発明の熱可塑性コンポジット成形用シートを
使用して得られた成形品の１例の概略図である。 Ａ、Ｂ、ＣおよびD:各リブの中央で、かつ上端から15mm
の位置FIG. 1 is a schematic view of one example of a molded article obtained by using the thermoplastic composite molding sheet of the present invention. A, B, C and D: at the center of each rib and 15 mm from the top
Position of
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C08J 5/04 - 5/10 C08J 5/24 B29B 11/16Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) C08J 5/04-5/10 C08J 5/24 B29B 11/16
Claims (1)
繊糸の切断物を集合一体化して得られた熱可塑性コンポ
ジット成形用シート。1. A thermoplastic composite molding sheet obtained by assembling and integrating cut pieces of a mixed fiber consisting of reinforcing fibers and thermoplastic resin fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25618889A JP2853205B2 (en) | 1989-09-29 | 1989-09-29 | Thermoplastic composite molding sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25618889A JP2853205B2 (en) | 1989-09-29 | 1989-09-29 | Thermoplastic composite molding sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03115436A JPH03115436A (en) | 1991-05-16 |
| JP2853205B2 true JP2853205B2 (en) | 1999-02-03 |
Family
ID=17289131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25618889A Expired - Fee Related JP2853205B2 (en) | 1989-09-29 | 1989-09-29 | Thermoplastic composite molding sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2853205B2 (en) |
-
1989
- 1989-09-29 JP JP25618889A patent/JP2853205B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03115436A (en) | 1991-05-16 |
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