JPS6037811B2 - reinforced prepreg - Google Patents

reinforced prepreg

Info

Publication number
JPS6037811B2
JPS6037811B2 JP8672379A JP8672379A JPS6037811B2 JP S6037811 B2 JPS6037811 B2 JP S6037811B2 JP 8672379 A JP8672379 A JP 8672379A JP 8672379 A JP8672379 A JP 8672379A JP S6037811 B2 JPS6037811 B2 JP S6037811B2
Authority
JP
Japan
Prior art keywords
prepreg
paper
resin
fibers
reinforcing
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
Application number
JP8672379A
Other languages
Japanese (ja)
Other versions
JPS5610532A (en
Inventor
誠 山田
午郎 角田
駿一郎 斉藤
史朗 浅田
明朗 三宅
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.)
Mitsubishi Rayon Co Ltd
Original Assignee
Mitsubishi Rayon Co Ltd
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 Mitsubishi Rayon Co Ltd filed Critical Mitsubishi Rayon Co Ltd
Priority to JP8672379A priority Critical patent/JPS6037811B2/en
Publication of JPS5610532A publication Critical patent/JPS5610532A/en
Publication of JPS6037811B2 publication Critical patent/JPS6037811B2/en
Expired legal-status Critical Current

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  • Reinforced Plastic Materials (AREA)
  • Laminated Bodies (AREA)

Description

【発明の詳細な説明】 本発明は、繊維強化プラスチックを作るに用いられる補
強した一方向引揃え繊維強化プリプレグに関するもので
ある。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to reinforced unidirectionally aligned fiber reinforced prepregs used in making fiber reinforced plastics.

一方向引揃え繊維強化プリブレグは、ゴルフシャフト、
釣竿、バトミントンシヤフトやテニスラケットのフレー
ムなどのスポーツ、レジャー用品、或いは車輪用リーフ
スプリング、自動車用ドライピングシャフト、板ばね、
その他積層板など工業用材料として広く利用されるよう
になって来ている。
Unidirectionally aligned fiber reinforced pre-legs are used for golf shafts,
Sports and leisure goods such as fishing rods, badminton shafts and tennis racket frames, leaf springs for wheels, driving shafts for automobiles, leaf springs,
It has also come to be widely used as an industrial material such as laminates.

しかし、一方向引揃えプリプレグは、円筒物に成形する
際などの如く芯体に巻き付けて成形する際に、一方向引
揃えプリプレグの裁断時の繊維のひきつれや乱れ、或い
は繊維間に割れ等が生じ易く細心の注意を要し、作業性
を低下させ、このような注意をおこたると成形作に得ら
れたものは所期の機械特性を有する繊維強化プラスチッ
クとすることが困難であることが指摘され、従来よりこ
のような欠点のない一方向引揃えプリプレグとして不織
布或いは織布の如き補強材を、前記プリプレグの少なく
とも一面に貼り合わせたプリプレグが開発され、その効
果をいかんなく発揮している。
However, when the unidirectionally aligned prepreg is wrapped around a core and formed into a cylindrical object, the fibers may become tangled or disordered, or cracks may occur between the fibers when the unidirectionally aligned prepreg is cut. It has been pointed out that this process tends to occur easily and requires careful attention, reducing workability, and that if such care is taken, it is difficult to obtain a fiber-reinforced plastic with the desired mechanical properties from the molding process. Therefore, a prepreg has been developed in which a reinforcing material such as a non-woven fabric or a woven fabric is bonded to at least one side of the prepreg as a unidirectionally aligned prepreg without such drawbacks, and the effect is fully exhibited.

ところが、このような補強材を少なくとも一面に貼り合
わせた前記プリプレグは、引揃えた補強繊維の一方向保
持、貯蔵、或いは運搬のため、その片面に紙製離型紙を
あて、ロール状或いはシート状とするのが通例であるが
、従釆プリプレグの巻取りに用いられて来た紙製離型紙
は、その絶乾状態の寸法に対して、通常の大気湿度(相
対湿度約60%)下で、吸湿によって縦横方向に約1〜
1.5%助長する。
However, in order to hold the reinforcing fibers in one direction, store them, or transport them, the prepreg, which has such a reinforcing material attached to at least one side, is placed in the form of a roll or sheet with paper release paper applied to one side of the prepreg. However, the paper release paper that has been used for winding the pre-preg prepreg has a size of , about 1~ in the vertical and horizontal directions due to moisture absorption
Promote 1.5%.

それ故、織布の如き補強層を有する一方向引揃えプリプ
レグに湿度により約1〜1.5%の伸びを生ずる紙製離
型紙を介在せしめ乾燥状態にて巻取ったものは、大気中
放置による吸湿で紙製離型紙の伸びが生じ、一方向引揃
え繊維層はその中方向へ紙製織型紙と一体となって伸長
するが、補強材はその構造上伸びることが出来ず、一方
向引揃え繊維層と補強材面との間に第1図中の4及び5
並びに第2図中の5に示した如き剥離が起りプレプリグ
の平面性が失われると共に、一方向引揃え繊維シート層
中に縦割れを生じたり、蛇行を生じたりする。このよう
な補強プリプレグ裁断したものを形成するときは「補強
繊維の縦割れや蛇行及びプリプレグの凹凸部の平面化へ
の修正のためには、プリプレグにシワを与えて修正する
他その修正方法はないため、このようなプリブレグより
作られた成形物は層間密着性が劣り、成形物内にボィド
を生じたり、繊維の蛇行、乱れにより機械的特性の良好
な成形物を作ることが困難であった。そこで、本発明者
等は上述の如き不都合のない補強プリプレグを製造する
ことを目的に検討中のところ特定の吸湿特性を有する紙
製離型紙を用いることによりその目的を達成し得ること
を見出し本発明に到達した。
Therefore, if a unidirectionally aligned prepreg with a reinforcing layer such as a woven fabric is interposed with a paper release paper that elongates by about 1 to 1.5% depending on humidity and is wound up in a dry state, it should be left in the atmosphere. The paper release paper elongates due to moisture absorption, and the unidirectionally aligned fiber layer elongates in the middle direction together with the paper weaving pattern, but the reinforcing material cannot elongate due to its structure and cannot be stretched in one direction. 4 and 5 in Figure 1 between the aligned fiber layer and the reinforcing material surface.
In addition, peeling as shown at 5 in FIG. 2 occurs, causing loss of flatness of the prepreg, and also causing vertical cracks or meandering in the unidirectionally aligned fiber sheet layer. When forming such cut pieces of reinforced prepreg, ``In order to correct vertical cracks and meandering of the reinforcing fibers and flatten the uneven portions of the prepreg, it is necessary to wrinkle the prepreg and use other correction methods. Therefore, molded products made from such pre-regs have poor interlayer adhesion, and it is difficult to create molded products with good mechanical properties due to voids occurring within the molded product and meandering and disordered fibers. Therefore, the present inventors are currently investigating the purpose of producing a reinforced prepreg that does not have the above-mentioned disadvantages, and have found that the purpose can be achieved by using a paper release paper having specific moisture absorption characteristics. Heading The present invention has been arrived at.

本発明の要旨とするところは、樹脂合浸した一方向引揃
え繊維強化プリプレグの片面に、相対湿度60%下で、
絶乾状態の寸法に対し、0.5%以下の伸びを有する紙
製雛型紙を貼り合わせ、他面に補強材或いは上記樹脂と
同系続の樹脂を含浸した補強材を貼り合わせた補強プリ
プレグに関するものである。
The gist of the present invention is to coat one side of a unidirectionally aligned fiber-reinforced prepreg coated with resin at a relative humidity of 60%.
Reinforced prepreg in which a paper template having an elongation of 0.5% or less with respect to the dimensions in an absolutely dry state is pasted together, and a reinforcing material impregnated with a reinforcing material or a resin of the same type as the above resin is pasted on the other side. It is something.

本発明に使用される紙製雛型紙は、片面もしくは両面を
シリコン系樹脂をコートし、焼付けて適度の離型性を有
し、厚み、秤量、中、長さ等に特に制限されるものでは
ないが、厚さ50〜150ミクロン、秤量70〜150
タ′あのものが好ましい。
The paper template used in the present invention has one or both sides coated with silicone resin and baked to have appropriate mold release properties, and is not particularly limited in terms of thickness, weight, medium, length, etc. No, but thickness 50-150 microns, weight 70-150
That one is preferable.

吸湿による寸法安定性は重要で相対湿度60%下での寸
法が絶乾状態の寸法に対し、0.5%以下の伸びを有す
る特定の紙製離型紙を使用することが必要となる。繊維
補強ブリプレグをシート状に成形し、或いは巻取りに際
してこれまで用いられてきた離型紙は通常の大気中の湿
度(約60〜70%)下での寸法が乾乾状態の寸法に対
し、吸湿により0.9〜1.1%中方向に伸びるもので
あるため、このような紙製離型紙を用いてプリプレグを
作る際には、離型紙を論湿して0.9〜1.1%伸長さ
せた後、一方向引揃えのプリプレグに貼り付け、裏打紙
とし、補強織布を貼り合わせという煩雑な方法を採用し
ているのであるが、このような処理によって作成したも
のでも大気中に放置すると離型紙の再度の伸長及び収縮
により補強織布はプリプレグより剥離し、一方向引揃え
繊維も蛇行を生ずるのである。
Dimensional stability due to moisture absorption is important, and it is necessary to use a specific paper release paper whose dimensions under 60% relative humidity have an elongation of 0.5% or less compared to the dimensions in an absolutely dry state. The release paper that has been used to date when forming or winding fiber-reinforced Buri Preg into a sheet has a moisture-absorbing dimension that is different from that under normal atmospheric humidity (approximately 60 to 70%). Therefore, when making a prepreg using such paper release paper, the release paper should be weighed to a concentration of 0.9 to 1.1%. After being stretched, it is pasted onto prepreg that is aligned in one direction, used as a backing paper, and then a reinforcing woven fabric is pasted on, which is a complicated method. If left as is, the reinforcing fabric will peel off from the prepreg due to the release paper's elongation and contraction again, and the unidirectionally aligned fibers will also meander.

雛型紙を調湿後使用したにもかかわらず、補強織布貼付
け後、上述の不都合が生じた理由は、通常一方向引揃え
繊維ブリプレグを作るためには補強繊維に樹脂を含浸す
ることが必要であるが、この樹脂含浸は樹脂を溶媒に溶
解した溶液に補強繊維を浸潰した後適当に乾燥する方法
、又は樹脂を加熱溶解し、熱ニップロール上で含浸させ
適当に冷却する等して作られるが、樹脂の繊維中への含
浸量及びプリプレグ厚みを均一にするには離型紙をプリ
ブレグに貼り合せた状態で、この加熱工程を経るのが好
都合であるため「調湿機型紙が再び乾燥されることによ
り収縮し、ほぼ調湿前の寸法にもどる。この補強織布の
貼り付いたプリプレグを大気中に放置すると、離型紙が
吸湿し、再び助長するため、補強織布の剥離にはじまる
という上述の不都合が発生することになる。また「吸湿
性のない離型紙としてフッ素樹脂フイルム、ポリエチレ
ンテレフタレートフイルム、或いはポリプロピレンフィ
ルムなどを用いる方法は、プリプレグと離型紙との貼り
合せ工程で加えられる熱によって、伸びが生じたり、そ
の取扱い性が悪化するなどのため、良好な形態を保持せ
しめることが難しく紙製離型紙を用いた以上の不都合が
生ずるのである。
The reason why the above-mentioned inconvenience occurred after applying the reinforcing fabric even though the template paper was used after conditioning the humidity is that it is usually necessary to impregnate the reinforcing fibers with resin in order to make unidirectionally aligned fiber buripreg. However, this resin impregnation can be done by immersing the reinforcing fibers in a solution of the resin dissolved in a solvent and then drying them appropriately, or by melting the resin by heating, impregnating it on hot nip rolls, and cooling it appropriately. However, in order to make the amount of resin impregnated into the fibers and the thickness of the prepreg uniform, it is convenient to go through this heating process with the release paper attached to the prepreg. When the prepreg with the reinforcing fabric attached is left in the air, the release paper absorbs moisture and promotes moisture again, causing the reinforcing fabric to peel off. In addition, the method of using fluororesin film, polyethylene terephthalate film, polypropylene film, etc. as a non-hygroscopic release paper causes the heat applied in the process of bonding the prepreg and release paper. This causes elongation and poor handling, making it difficult to maintain a good shape, resulting in more inconveniences than using paper release paper.

本発明に於て用いる紙製離型紙は前述した如く、厚さが
50〜150ミクロンで、秤量70〜150多′めで、
吸湿による伸長率0.5%以下のものがよく、樹脂によ
る耐湿加工を施さないもの、或し、は耐湿加工を施した
ものなど種々のものを用い得るが、この耐湿加工に用い
る樹脂がポリエチレンの如き耐熱性の不良なものを用い
るときは、プリプレグ中にこれらの樹脂が混入し、一方
向引揃え繊維シート中に繊維割れを生じたり、乾燥機や
各種ローラへの当該樹脂の付着等種々の不都合が生ずる
場合も生ずるので出来るだけこの処理を施さないものを
用いるのが好ましい。
As mentioned above, the paper release paper used in the present invention has a thickness of 50 to 150 microns, a basis weight of 70 to 150 microns,
The elongation rate due to moisture absorption is preferably 0.5% or less, and various materials can be used, such as those without moisture-resistant processing with resin, or those with moisture-resistant processing, but the resin used for this moisture-resistant processing is polyethylene. When using materials with poor heat resistance such as, these resins may be mixed into the prepreg, causing fiber cracks in the unidirectionally aligned fiber sheet, or adhesion of the resin to the dryer or various rollers, etc. However, it is preferable to use a material that is not subjected to this treatment as much as possible.

本発明に於て一方向引揃え補強繊維として用いるものと
しては例えば炭素繊維、ガラス繊維、金属繊維、ボロ繊
維などの無機繊維類、芳香族ポリアミド、ポリアミドィ
ミド繊維などの有機繊維類或いはこれらの組合せなどで
ある。
In the present invention, the unidirectionally aligned reinforcing fibers include, for example, inorganic fibers such as carbon fibers, glass fibers, metal fibers, and rag fibers; organic fibers such as aromatic polyamide fibers and polyamideimide fibers; combination etc.

そして繊維の厚みは0.05〜0.5柳(繊維容積60
%に換算)が適当で連続フィラメントの長さ、本数等に
何ら制限するものでない。又、本発明に用いられる一方
向引揃え繊維に含浸される繊維は、熱硬化性樹脂例えば
ェポキシ系樹脂、フェノール系樹脂、或いは不飽和ポリ
エステル系樹脂等の熱硬化性樹脂がその主であるが、こ
の他熱可塑性樹脂をも十分に用い得る。
And the thickness of the fiber is 0.05 to 0.5 willow (fiber volume 60
%) is appropriate, and there are no restrictions on the length, number, etc. of the continuous filaments. Furthermore, the fibers impregnated into the unidirectionally aligned fibers used in the present invention are mainly thermosetting resins such as epoxy resins, phenolic resins, or unsaturated polyester resins. , other thermoplastic resins may also be used.

一方向引揃えプリプレグの樹脂含有量は10〜6肌t%
でとくに30〜45M%なる範囲が好ましい。本発明に
用いる補強織布は炭素繊維、ガラス繊維などの無機繊維
類或いは芳香族ポリアミド、ポリアミドィミドを初めと
する有機繊維等から作られた織布、不織布、又はこれら
の交織物等からなり、これらの補強織布は一方向引揃え
プリプレグに使用される樹脂を含浸した、或し、は含浸
しないものいずれも用いることができ、これら補強織布
の厚みは0.02〜0.5肋で、好ましくは0.03〜
0.18肌を用いるのがつい。樹脂を含浸した補強織布
の樹脂含有率は10〜6肌t%で、好ましくは20〜4
肌t%なる範囲である。更に樹脂には、適量の硬化剤も
しくは触媒を混合して含浸することも出来る。本発明の
補強プリプレグの一製造例を示すと、スプールより繰り
出された連続フィラメントをシート状になる様、一方向
に引揃え、熱硬化性樹脂格で樹脂を含浸させた後、相対
湿度60%下での寸法が絶乾状態の寸法に対し、0.5
%以下の伸びを有する紙製離型紙を下側から導入して貼
り合わせ、次いで溶媒を樽散させるため乾燥部を通過さ
せ、樹脂を含浸させた補強織布を一方向引揃えプリプレ
グの表面に導入し、加熱ニップロールで貼り合わせなが
ら連続的に巻き上げる。当該本発明の補強プリプレグの
製法に於て一方向引揃え補強繊維への樹脂の含浸は、上
記浸債法に変え、縦型紙上へ含浸用樹脂フィルムを形成
せしめたものを、補強繊維シートと級■製雛型紙との貼
り合せの工程で含浸せしめる方法も用いうる。また、上
記方法では補強用織布と、一方向引揃え樹脂含浸シート
との貼り合せを−工程中にて行ったが、この貼り合せは
補強用織布を後の別工程で行なうこともでき、このよう
な工程をとるときは、従来法にては均一性の良好な補強
プリプレグを作ることは難しかったのであるが、本発明
に於ては、特定の性質を有する紙製雛型紙を用いている
ため、このような不都合が起ることはない。本発明の補
強プリプレグは、通常の大気中に放置しても、紙製離型
紙の吸湿による伸びが極めて小さいため、プリプレグと
補強用織布との間で剥離は起らず、その平滑性が良好に
保たれており、一方向引揃え繊維の蛇行、縦割れ、乱れ
などの不都合が起らず、これを裁断し、雛型紙をはがし
て積層、或いは芯体に捲きつける作業性は良好で、成形
物も欠陥がなく、機械的特性も良好である。
The resin content of the unidirectionally aligned prepreg is 10 to 6 t%
A range of 30 to 45 M% is particularly preferred. The reinforcing woven fabric used in the present invention is a woven fabric made of inorganic fibers such as carbon fibers and glass fibers, or organic fibers such as aromatic polyamide and polyamideimide, a nonwoven fabric, or a mixed fabric thereof. These reinforcing woven fabrics can be impregnated with or not impregnated with the resin used for unidirectionally aligned prepregs, and the thickness of these reinforcing woven fabrics is 0.02 to 0.5 ribs. and preferably 0.03~
It is best to use 0.18 skin. The resin content of the reinforced woven fabric impregnated with resin is 10 to 6 t%, preferably 20 to 4 t%.
The range is t% of the skin. Furthermore, the resin can be impregnated with a suitable amount of a curing agent or catalyst. To show an example of manufacturing the reinforced prepreg of the present invention, continuous filaments are drawn out from a spool, aligned in one direction to form a sheet, impregnated with thermosetting resin, and then dried at a relative humidity of 60%. The dimension at the bottom is 0.5 compared to the dimension in an absolutely dry state.
A paper release paper with an elongation of less than 30% is introduced from the bottom and bonded together, and then passed through a drying section to disperse the solvent, and a reinforcing woven fabric impregnated with resin is unidirectionally aligned on the surface of the prepreg. It is then rolled up continuously while being bonded together using heated nip rolls. In the manufacturing method of the reinforced prepreg of the present invention, the impregnation of the unidirectionally aligned reinforcing fibers with resin is changed to the bonding method described above, and a resin film for impregnation is formed on a vertical paper, and then a reinforcing fiber sheet is formed. It is also possible to use a method in which the material is impregnated in the process of pasting with the grade 2 pattern paper. In addition, in the above method, the reinforcing fabric and the unidirectionally aligned resin-impregnated sheet were bonded during the process, but this bonding can also be done in a separate process after the reinforcing fabric. When using such a process, it was difficult to make reinforced prepreg with good uniformity using conventional methods, but in the present invention, paper templates with specific properties are used. Therefore, such inconvenience will not occur. Even if the reinforcing prepreg of the present invention is left in normal air, the elongation due to moisture absorption of the paper release paper is extremely small, so no peeling occurs between the prepreg and the reinforcing woven fabric, and its smoothness is maintained. It is kept in good condition, and there are no problems such as meandering, vertical cracking, or disorder of the unidirectionally aligned fibers, and the workability of cutting it, peeling off the pattern paper, and laminating it or winding it around the core is good. The molded product also has no defects and has good mechanical properties.

以下に本発明の実施例を記載する。実施例 平行に、均一な張力で縦方向に引揃えられた連続炭素繊
維トウに、ェポキシ樹脂組成物128部およびメチルエ
チルケトン85部からなる混合物の60%溶液を含浸さ
せ、ロールで樹脂含有量を調整したのち、下部より絶乾
状態での中が520.5帆であり、相対湿度60%下で
0.38%である紙製離型紙を導入し、貼り合せ温度1
00℃の乾燥機内を通過させ、溶媒を輝散させると同時
に、Bステージ化し、中505肌の一方向引揃え炭素繊
維プリプレグとし、補強織布を貼りつけずにそのまま連
続的に巻き上げサンプル1とした。
Examples of the present invention will be described below. Example: Continuous carbon fiber tows drawn vertically in parallel with uniform tension were impregnated with a 60% solution of a mixture consisting of 128 parts of an epoxy resin composition and 85 parts of methyl ethyl ketone, and the resin content was adjusted using a roll. After that, a paper release paper with an absolute humidity of 520.5 sails and a relative humidity of 0.38% at a relative humidity of 60% was introduced from the bottom, and the lamination temperature was 1.
At the same time, it was passed through a dryer at 00°C to disperse the solvent, and at the same time it was made into a B-stage, and the carbon fiber prepreg with unidirectional alignment of the middle 505 skin was made into a carbon fiber prepreg. did.

乾燥機の出口まで、サンプル1と同様の方法を繰返し、
この出口で上記と同じ組成のェポキシ樹脂を2仇れ%含
浸させた厚み0.03脚中、520脚中の平織ガラス織
物をプリプレグの上面に5000のニツプロール上で貼
り合せ、連続的に巻き上げサンプル2とした。一方、比
較例として、絶乾状態で520側の相対湿度60%下で
0.77%伸長する紙製離型を用いる他はサンプル1と
全く同様の方法にてプリプレグを作りサンプル3とした
Repeat the same method as sample 1 until the exit of the dryer.
At this outlet, a plain weave glass fabric impregnated with 2% epoxy resin having the same composition as above and having a thickness of 0.03 mm and 520 mm is laminated onto the top surface of the prepreg on a 5000 mm Nitz roll, and the sample is continuously rolled up. It was set as 2. On the other hand, as a comparative example, a prepreg was prepared as Sample 3 in exactly the same manner as Sample 1, except that a paper release mold that elongated by 0.77% at a relative humidity of 60% on the 520 side in an absolutely dry state was used.

サンプル2の製法に於て紙製離型紙として伸び率0.7
7%の上記離型紙を用いる他は全く同様にして補強プリ
プレグを作りサンプル4とした。これら4つのサンプル
の巻き上げ時の紙製離型紙の巻き上げ時の中はサンプル
1及び2で520.5肌、サンプル3及び4で520.
5脚であった。
In the manufacturing method of Sample 2, the elongation rate was 0.7 as paper release paper.
A reinforced prepreg was made in the same manner as Sample 4, except that 7% of the release paper was used. When these four samples were rolled up, the inside of the paper release paper when rolled up was 520.5 skin for Samples 1 and 2, and 520.5 skin for Samples 3 and 4.
It had five legs.

サンプル1及び3を冷凍室に1日放置後、再び取り出し
、連続的に引き出して、サンプル2又は4を作る際して
用いたものと同じ平織ガラス織物プリプレグを6000
に加熱したニツプローラーで貼り合せ巻き上げた夫々の
プリプレグをサンプル5及びサンプル6とした。巻き上
げ時の紙製離型紙の中はサンプル5,6で、共に522
脚であった。これらサンプルのうち、サンプル1及び3
を相対湿度62%下に放置したところ、紙製雛型紙の中
はサンプル1で522.5脚、サンプル3で524側と
なった。すなわち吸湿による紙製離型紙の中の伸長率は
サンプル1で0.38%、サンプル3で0.77%であ
った。サンプル2,4及び5,6を同機相対湿度62%
下に放置したところ、サンプル4及び6は約30分後紙
製離型紙は吸湿し、伸長が始まり、補強プリプレグの各
所に第1図に示す如く凹凸が発生すると同時に、第2図
に示す如くその部分の補強ガラス織物の剥離が起こり始
め、繊維の蛇行及び縦割れが生じた。
After leaving Samples 1 and 3 in the freezer for one day, they were taken out again and continuously pulled out to produce 6,000 pieces of the same plain-woven glass fabric prepreg used in making Samples 2 or 4.
Sample 5 and Sample 6 were prepared by bonding and rolling up the prepregs using a heated nip roller. Samples 5 and 6 are both 522 in the paper release paper when rolled up.
It was a leg. Among these samples, samples 1 and 3
When the sample was left at a relative humidity of 62%, the inside of the paper pattern paper became 522.5 sides for sample 1 and 524 sides for sample 3. That is, the elongation rate in the paper release paper due to moisture absorption was 0.38% for Sample 1 and 0.77% for Sample 3. Samples 2, 4, 5, and 6 were kept at the aircraft relative humidity of 62%.
When samples 4 and 6 were left for about 30 minutes, the paper release paper absorbed moisture and began to elongate, causing unevenness to appear in various parts of the reinforced prepreg as shown in Figure 1, and at the same time as shown in Figure 2. The reinforcing glass fabric in that area began to peel, causing meandering and vertical cracking of the fibers.

第1図及び第2図中、1は補強織布、2は一方向引揃え
炭素繊維、3は紙製離型紙、4及び5は剥離部を示す。
一方サンプル2及び5は全く変化が起こらず、平面性を
保持し補強ガラス織物の剥離も発生しなかった。このサ
ンプル4及び6を更に一週間、同じ大気中に放置したが
、全く変化が起こらなかった。これら相対湿度62%下
に放置したサンプル2,4及び5,6を梯形片に切り出
し、離型紙をはぎ取り、テーパー率2.1/1000、
中心部直径10.93肋のステンレススチール製の芯金
にローリングマシンにてガラス織物面を内側にして3ブ
ラィ巻き付けた。
In FIGS. 1 and 2, 1 is a reinforcing woven fabric, 2 is a unidirectionally aligned carbon fiber, 3 is a paper release paper, and 4 and 5 are peeling parts.
On the other hand, Samples 2 and 5 showed no change at all, maintained flatness, and did not peel off the reinforced glass fabric. Samples 4 and 6 were left in the same atmosphere for another week, but no changes occurred. Samples 2, 4, 5, and 6 left under a relative humidity of 62% were cut into trapezoidal pieces, the release paper was removed, and the taper ratio was 2.1/1000.
It was wound with three braids using a rolling machine around a stainless steel core metal with a center diameter of 10.93 ribs, with the glass fabric side facing inside.

巻き付け後表面を観察すると、サンプル4,6において
は紙製離型紙の吸湿による凹凸から生じた部分は巻き付
けによってその部分に無理がかかりしわが入り、明らか
に繊維の蛇行がみられ、サンプル2,5プリプレグが平
面性を有していたため巻き付け後も全く繊維の乱れは見
られず極めてきれいな表面となった。次いで170PO
で90分間加熱し樹脂を完全硬化させた後、芯金を抜き
取り中空藤を得た。硬化後もサンプル4,6では繊維の
乱れがそのまま残りサンプル2,5では全く乱れは起こ
らずきれいな表面を保持していた。
Observing the surface after wrapping, in Samples 4 and 6, the areas caused by unevenness due to moisture absorption of the paper release paper were strained and wrinkled by wrapping, and meandering of the fibers was clearly observed; Since the prepreg No. 5 had flatness, no disturbance of the fibers was observed even after winding, resulting in an extremely clean surface. Then 170PO
After heating for 90 minutes to completely cure the resin, the core metal was extracted to obtain a hollow wisteria. Even after curing, the disordered fibers remained in Samples 4 and 6, while in Samples 2 and 5, no disorder occurred at all and a clean surface was maintained.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来法によって作られた補強プリプレグの大気
中放置後の一部展開部を含む平面図を、第2図はその断
面図である。 才ナ図 三ャ 2 図
FIG. 1 is a plan view including a partially expanded portion of a reinforcing prepreg made by a conventional method after being left in the atmosphere, and FIG. 2 is a cross-sectional view thereof. Figure 2

Claims (1)

【特許請求の範囲】[Claims] 1 樹脂含浸した一方向引揃え繊維強化プリプレグの片
面に、相対湿度60%下で、絶乾状態の寸法に対し、0
.5%以下の伸びを有する紙製離型紙を貼り合わせ、他
面に補強織布或いは上記樹脂と同系統の樹脂を含浸した
補強織布を貼り合わせた補強プリプレグ。
1 One side of the resin-impregnated unidirectionally aligned fiber-reinforced prepreg was coated with 0
.. A reinforced prepreg made by laminating a paper release paper with an elongation of 5% or less and laminating a reinforcing woven fabric or a reinforcing woven fabric impregnated with the same type of resin as the above resin on the other side.
JP8672379A 1979-07-09 1979-07-09 reinforced prepreg Expired JPS6037811B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8672379A JPS6037811B2 (en) 1979-07-09 1979-07-09 reinforced prepreg

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8672379A JPS6037811B2 (en) 1979-07-09 1979-07-09 reinforced prepreg

Publications (2)

Publication Number Publication Date
JPS5610532A JPS5610532A (en) 1981-02-03
JPS6037811B2 true JPS6037811B2 (en) 1985-08-28

Family

ID=13894782

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8672379A Expired JPS6037811B2 (en) 1979-07-09 1979-07-09 reinforced prepreg

Country Status (1)

Country Link
JP (1) JPS6037811B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59164133A (en) * 1983-03-09 1984-09-17 東レ株式会社 Prepreg material
JP2592811B2 (en) * 1986-10-23 1997-03-19 尾池工業株式会社 Thermal transfer media that changes color with temperature

Also Published As

Publication number Publication date
JPS5610532A (en) 1981-02-03

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