JPH085079B2 - Method for producing fiber-reinforced thermoplastics - Google Patents
Method for producing fiber-reinforced thermoplasticsInfo
- Publication number
- JPH085079B2 JPH085079B2 JP62079715A JP7971587A JPH085079B2 JP H085079 B2 JPH085079 B2 JP H085079B2 JP 62079715 A JP62079715 A JP 62079715A JP 7971587 A JP7971587 A JP 7971587A JP H085079 B2 JPH085079 B2 JP H085079B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- cut
- prepreg
- cuts
- 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.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 229920001169 thermoplastic Polymers 0.000 title claims description 7
- 239000004416 thermosoftening plastic Substances 0.000 title claims description 7
- 239000000835 fiber Substances 0.000 claims description 44
- 238000000465 moulding Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 18
- 239000012783 reinforcing fiber Substances 0.000 claims description 13
- 229920005992 thermoplastic resin Polymers 0.000 claims description 4
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 238000011156 evaluation Methods 0.000 description 8
- 238000004080 punching Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- -1 polypropylene Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000009969 flowable effect Effects 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 101100008047 Caenorhabditis elegans cut-3 gene Proteins 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001643 poly(ether ketone) Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 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
- 229920001721 polyimide Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reinforced Plastic Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、繊維強化熱可塑性プラスチック（以下FRTP
と略す）に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is directed to a fiber reinforced thermoplastic (hereinafter FRTP).
Abbreviated).
従来よりFRTPとしては、繊維長1mm以下の短繊維強化
のものと、コンティニアスストランドを使用したマット
状長繊維を強化材とするものが知られている。Conventionally, FRTP is known to be reinforced with a short fiber having a fiber length of 1 mm or less, and one having a mat-shaped long fiber using continuous strands as a reinforcing material.
前者は、繊維流動性が良好で、射出成形用材料として
広汎に使用されており、成形品の外観は良好であるが強
度は低い。The former has good fiber fluidity and is widely used as an injection molding material, and the appearance of the molded product is good, but the strength is low.
一方、後者は、繊維流動性が悪く、主として平面形状
に近い物品を成形する。いわゆるスタンピング成形材料
として使用されており、成形品の外観は悪いが、強度は
高い。On the other hand, the latter has a poor fiber fluidity and mainly forms an article having a substantially planar shape. It is used as a so-called stamping molding material, and the molded product has a poor appearance but high strength.
近年、上述した２種の材料の長所を合せ持った材料、
すなわち繊維流動性が良好で、外観も良く、成形品強度
が高い材料として、25mm前後に切断した繊維を強化材と
するチョップドヤーン系FRTPが開発されている。In recent years, materials that combine the advantages of the above two materials,
That is, a chopped yarn-based FRTP having a fiber cut to about 25 mm as a reinforcing material has been developed as a material having good fiber fluidity, good appearance, and high molded product strength.
このチョップドヤーン系FRTPの製造法としては、通常
一方向に配向した長繊維によるシート状プリプレグを繊
維長が25mm前後になるように短冊状に細かく切断し、そ
の切断片を所望の形状に積み重ね、後述するプレス形
成、オートクレーブ成形、スタンピング成形等を行なう
方法などが用いられている。As a method for producing this chopped yarn FRTP, usually, a sheet-like prepreg made of long fibers oriented in one direction is finely cut into strips so that the fiber length is around 25 mm, and the cut pieces are stacked in a desired shape, Methods such as press forming, autoclave forming, stamping forming, etc., which will be described later, are used.
しかしながら、このチョップドヤーン系FRTPは、成形
時において繊維の流れむらや繊維配向がかならず発生す
るので、強度のばらつきや成形品のソリ、ねじれが発生
し、構造材として使用する場合は信頼性の点で問題点が
多い。However, in this chopped yarn FRTP, uneven flow of fibers and fiber orientation always occur at the time of molding, so variations in strength, warpage and twisting of molded products occur, and reliability points when used as structural materials. There are many problems.
また、繊維含有率を高くすると成形時の流動性が極端
に悪くなり、金型に充填しなくなるという問題点もあ
る。Further, if the fiber content is increased, the fluidity at the time of molding becomes extremely poor, and there is a problem that the mold cannot be filled.
本発明は上記問題点に鑑み成されたものであり、その
目的は成形時の流動性が良好で充填不良が発生せず、か
つ成形時の繊維の流れむら等による成形後のソリ、ねじ
れおよび強度のばらつきの無い高品質のFRTPの製造法を
提供することにある。The present invention has been made in view of the above problems, and its object is good fluidity during molding without causing defective filling, and warpage after molding due to uneven flow of fibers during molding, twisting and the like. It is to provide a manufacturing method of high quality FRTP without variations in strength.
本発明者らは、上記目的を達成するため鋭意検討を行
なった結果、本発明を完成するに至った。The present inventors have completed the present invention as a result of intensive studies to achieve the above object.
すなわち本発明は、一方向に配列してなる補強用繊維
に熱可塑性樹脂を含浸してなるシート状プリプレグを複
数枚積み重ねて成形する繊維強化熱可塑性プラスチック
の製造法において、該プリプレグ上に、繊維を横切る方
向で、繊維を切断する深さの切れ目を有することを特徴
とする繊維強化熱可塑性プラスチックの製造法である。That is, the present invention is a method for producing a fiber reinforced thermoplastic in which a plurality of sheet-like prepregs obtained by impregnating a reinforcing fiber arranged in one direction with a thermoplastic resin are stacked and molded, in which the fiber is A method for producing a fiber-reinforced thermoplastic, characterized in that it has cuts in a direction that cuts the fibers in a direction crossing.
本発明に使用する熱可塑性樹脂としては、例えばポリ
スチレン、ポリプロピレン、ポリエチレン、AS樹脂、AB
S樹脂、ASA樹脂（ポリアクリロニトリル、ポリスチレ
ン、ポリアクリル酸エステル）、ポリメチルメタクリレ
ート、ナイロン、ポリアセタール、ポリカーボネート、
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、ポリフェニレンオキシド、ふっ素樹脂、ポリフェ
ニレンスルフィド、ポリスルフォン、ポリエーテルサル
フォン、ポリエーテルケトン、ポリエーテルエーテルケ
トン、ポリイミド、ポリアリレート等がある。As the thermoplastic resin used in the present invention, for example, polystyrene, polypropylene, polyethylene, AS resin, AB
S resin, ASA resin (polyacrylonitrile, polystyrene, polyacrylic acid ester), polymethylmethacrylate, nylon, polyacetal, polycarbonate,
There are polyethylene terephthalate, polybutylene terephthalate, polyphenylene oxide, fluororesin, polyphenylene sulfide, polysulfone, polyether sulfone, polyether ketone, polyether ether ketone, polyimide, polyarylate and the like.
本発明に使用する補強用繊維としては、例えばガラス
繊維、カーボン繊維、アラミド繊維、炭化ケイ素繊維等
が代表的なものである。またその繊維は通常太さ３〜13
μｍのモノフィラメントを3000〜12000本収束したロー
ビングを100〜200本一方向に並べたものを用いる。Typical reinforcing fibers used in the present invention are, for example, glass fibers, carbon fibers, aramid fibers, silicon carbide fibers and the like. Moreover, the fiber is usually 3 to 13 in thickness.
100 to 200 rovings obtained by converging 3000 to 12000 monofilaments of μm are arranged in one direction.
なお、従来のコンティニアスストンドまたはチョップ
ドヤーン系を用いたプリプレグは、流動性の面から、そ
の補強用繊維の体積含有率が30〜40vol％以下のものし
か使用できなかった。しかし、本発明によれば繊維の流
動性が改善されるので、補強用繊維の体積含有率が55〜
65vol％のものも使用可能であり、FRTPの強度の向上が
期待できる。From the viewpoint of fluidity, the conventional prepreg using the continuous-stained or chopped yarn system can only use reinforcing fibers having a volume content of 30 to 40 vol% or less. However, according to the present invention, since the fluidity of the fiber is improved, the volume content of the reinforcing fiber is 55 to
65 vol% can also be used, and FRTP strength can be expected to improve.
熱可塑性樹脂を補強用繊維に含浸させる方法としては
種々の手段があるが、最も一般的な方法は以下の二つで
ある。There are various methods for impregnating the reinforcing fibers with the thermoplastic resin, but the two most general methods are as follows.
ひとつは、溶媒に可溶な樹脂であれば、その樹脂を溶
液化して補強用繊維に含浸し、脱泡しながら溶媒を除去
し、プリプレグを作成する方法である。One is a method of preparing a prepreg by dissolving the resin in a solvent, impregnating the reinforcing fiber with the resin, and removing the solvent while defoaming.
もうひとつは、樹脂を加熱溶融して補強用繊維に含浸
し、脱泡し冷却してプリプレグを作成する方法である。The other is a method in which a resin is heated and melted to impregnate a reinforcing fiber, defoamed, and cooled to prepare a prepreg.
次に、切れ目の長さおよび位置の具体例を図面を用い
て説明する。Next, a specific example of the length and position of the break will be described with reference to the drawings.
第１図（Ａ）〜（Ｃ）は、本発明におけるプリプレグ
上の切れ目の具体例を示す平面図である。1 (A) to 1 (C) are plan views showing specific examples of cuts on a prepreg in the present invention.
一方向強化のシート状プリプレグ２の補強用繊維の方
向１が矢印で示され、また切れ目３が多数設けられてい
る。例えば第１図（Ａ）および（Ｂ）においては、切れ
目３は破線状および階段状に規則的に形成されており、
各々の切断される補強繊維の長さが均一な一定寸法の短
冊形状のプリプレグ段片４になるように形成されてい
る。The direction 1 of the reinforcing fiber of the unidirectionally strengthened sheet-like prepreg 2 is indicated by an arrow, and a large number of cuts 3 are provided. For example, in FIGS. 1A and 1B, the cuts 3 are regularly formed in a broken line shape and a step shape,
The reinforcing fibers to be cut are formed into strip-shaped prepreg step pieces 4 having a uniform length and a uniform length.
また、第１図（Ｃ）に示すように不規則に切れ目３を
入れた場合でも本発明の効果は生じるが、以下に述べる
条件を満たすものであれば、その効果はより顕著とな
る。Further, although the effect of the present invention is obtained even when the cuts 3 are irregularly formed as shown in FIG. 1 (C), the effect is more remarkable as long as the conditions described below are satisfied.
その条件とは、切れ目の長さが２〜10mmであり、切れ
目と切れ目の間隙が切れ目方向において２〜30mmになる
ように列を成し、かつその列同士の間隙を５〜100mmに
することである。このような切れ目の長さおよび配置
は、プリプレグ３の充填性、繊維の流動性等の面から、
最も効果的になるように上述の範囲を考慮して適宜選定
すればよい。The condition is that the length of the cut is 2 to 10 mm, the rows are formed so that the gap between the cuts is 2 to 30 mm in the cut direction, and the gap between the rows is 5 to 100 mm. Is. The length and arrangement of such cuts are, in terms of the filling property of the prepreg 3 and the fluidity of the fibers,
It may be appropriately selected in consideration of the above range so as to be most effective.
なお、切れ目の深さは、補強繊維が完全に切断される
深さであればよい。In addition, the depth of the cut may be a depth at which the reinforcing fiber is completely cut.
第２図（Ａ）および（Ｂ）は切れ目を有するプリプレ
グの断面図である。第２図（Ａ）に示されるように切れ
目３がプリプレグ２を突抜けていれば、また第２図
（Ｂ）に示されるように切れ目３が下側の樹脂部分５に
は達していなくとも、繊維部分６を完全に切断していれ
ば本発明の効果を生じさせることができる。2A and 2B are cross-sectional views of a prepreg having a cut. Even if the cut 3 penetrates the prepreg 2 as shown in FIG. 2 (A), or even if the cut 3 does not reach the lower resin portion 5 as shown in FIG. 2 (B). As long as the fiber portion 6 is completely cut, the effect of the present invention can be produced.
次に、プリプレグに切れ目を入れる手段の具体例を説
明する。Next, a specific example of means for making a break in the prepreg will be described.
通常のプリプレグは、鋭利な刃物により切れ目を入れ
ることができる。さらに大量に処理を行なう場合は、刃
を切れ目形状通りに木板に埋め込んだ、いわゆる抜き刃
を、液圧プレスあるいはクランクプレスに装着し、プリ
プレグをプレスに装着した抜き刃の下に置き打ち抜く方
法を用いる。あるいは、刃を回転ローラーに埋め込み、
このローラーとゴムロールを一対とし、回転ローラーを
回転させて、ゴムロールと刃付ローラーの間にプリプレ
グを通して、連続的に切れ目を入れる方法を用いる。A normal prepreg can be cut with a sharp blade. When processing a larger amount, a so-called punching blade, which is a blade embedded in a wooden board according to the cut shape, is attached to a hydraulic press or a crank press, and the prepreg is placed under the punching blade attached to the press and punched. To use. Alternatively, embed the blade in a rotating roller,
A method is used in which this roller and a rubber roll are paired, a rotary roller is rotated, and a prepreg is passed between the rubber roll and the bladed roller to continuously make cuts.
次に、切れ目を入れたプリプレグを積層する時のその
繊維方向については、成形後のFRTPに求められる物性に
よって適宜選択できる。例えば、水平方向の強度につい
て等方性を有するFRTPを作製する場合は、プリプレグの
繊維方向を例えば45°ずつずらし、繊維方向が偏らない
ように積層する。また、一方向のみ強度が必要な場合
は、繊維方向をひとつの方向にそろえて積層する。上述
のようにして積層したプリプレグの積層体をFRTP成形品
にする成形法としては、従来のチョップドヤーン系FRTP
に使用する成形法を用いることができる。Next, the fiber direction when the cut prepregs are laminated can be appropriately selected depending on the physical properties required for FRTP after molding. For example, when producing FRTP having isotropic strength in the horizontal direction, the fiber directions of the prepreg are shifted by 45 °, for example, and the prepregs are laminated so that the fiber directions are not biased. When the strength is required only in one direction, the fiber directions are aligned in one direction and laminated. A conventional chopped yarn-based FRTP is used as a molding method for forming the prepreg laminated body laminated as described above into a FRTP molded product.
The molding method used for can be used.
例えば、プレスに装着した金型中で前記積層体をその
流動可能温度以上に加熱しながら、１〜300kg/cm2の圧
力で、10秒〜60分加圧し、少なくともそのガラス転移温
度以下に冷却してから脱型する、いわゆるプレス成形法
や、真空下で脱泡し、その流動可能温度以上に加熱した
後、20kg/cm2以下の圧力で賦形し、その後少なくともガ
ラス転移温度以下に冷却してから脱型する、いわゆるオ
ートクレーブ成形法などが一般的である。For example, while heating the laminate above its flowable temperature in a mold attached to a press, it is pressed at a pressure of 1 to 300 kg / cm 2 for 10 seconds to 60 minutes and cooled to at least its glass transition temperature or less. Then, demolding, so-called press molding method, degassing under vacuum, heating above its flowable temperature, shaping at a pressure of 20 kg / cm 2 or less, and then cooling to at least the glass transition temperature or less. The so-called autoclave molding method, in which the mold is then removed, is generally used.
また、前記積層体をオーブン中でその流動可能温度以
上に加熱した後、その積層体あるいは上述した成形法に
より成形された板状FRTPを少なくともそのガラス転移温
度以下に加熱したプレス金型中に投入し、金型を短時間
で圧締し、賦形、脱泡および冷却を同時に行なう高速成
形法、いわゆるスタンピング成形法を用いることもでき
る。In addition, after heating the laminate above the flowable temperature in an oven, the laminate or the plate-like FRTP formed by the above-mentioned molding method is put into a press mold heated to at least the glass transition temperature or less. However, it is also possible to use a so-called stamping molding method, which is a high-speed molding method in which the mold is clamped in a short time, and shaping, defoaming and cooling are simultaneously performed.
さらに、本発明の成形法にはインジェクション成形品
の補強用として前記積層体または上述した成形法により
成形されたFRTPをあらかじめ金型内に挿入しておき、イ
ンジェクション成形用樹脂と一体化する方法も含まれ
る。Further, in the molding method of the present invention, as a reinforcement of the injection molded article, the laminate or FRTP molded by the above-described molding method is previously inserted into a mold, and a method of integrating with an injection molding resin is also available. included.
以上説明してきたように、長繊維プリプレグを切断し
た小さなプリプレグ切断片を多数積み重ねて成形する従
来のチョップドヤーン系FRTPと比較して、本発明によれ
ば、長繊維プリプレグにその繊維を切断するような切れ
目を設けることにより、成形時における繊維の不規則な
流れが抑制される。その結果、成形後のソリ、ねじれお
よび強度のばらつきが無くなり、高品質のFRTPが製造で
きる。As described above, in comparison with the conventional chopped yarn FRTP in which a large number of small prepreg cut pieces obtained by cutting long fiber prepregs are stacked and formed, according to the present invention, it is possible to cut the fibers into long fiber prepregs. By providing such a cut, the irregular flow of fibers during molding is suppressed. As a result, warpage after molding, twist and variations in strength are eliminated, and high quality FRTP can be manufactured.
さらには、繊維の不規則な流れが抑制されるので、繊
維同士のからまりが少なくなり、その結果流動性が良く
なり充填不良が無くなる。Furthermore, since the irregular flow of the fibers is suppressed, the entanglement between the fibers is reduced, and as a result, the fluidity is improved and the filling failure is eliminated.
以下、本発明を実施例および比較例により更に詳細に
説明する。Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.
なお、以下の実施例および比較例に使用するプリプレ
グは特開昭61−229535に記載されている、一方向にシー
ト状に引張られながら搬送される複数の繊維を樹脂塗膜
付与ロールに接触させる方法により作製したシート状プ
リプレグを用いた。また、そのプリプレグに使用したマ
トリックス樹脂、強化繊維および強化繊維の体積含有率
（Vf）を第１表に示す。The prepreg used in the following Examples and Comparative Examples is described in JP-A-61-229535, in which a plurality of fibers conveyed while being pulled in a sheet shape in one direction is brought into contact with a resin coating film-applying roll. A sheet-like prepreg manufactured by the method was used. In addition, Table 1 shows the matrix resin used for the prepreg, the reinforcing fibers, and the volume content (Vf) of the reinforcing fibers.
実施例１ プリプレグａを用いて、第１図（Ａ）に示すようなパ
ターンで切れ目を設けた。Example 1 Using prepreg a, cuts were made in a pattern as shown in FIG.
なお、その切れ目は先に述べたように切れ目の長さが
5mmで、切れ目と切れ目の間隔も5mmで、切れ目と切れ目
の列の間隔は12.5mmで、切れ目の深さはプリプレグの繊
維を完全に切断する深さとした。In addition, the length of the break is as described above.
The distance was 5 mm, the distance between the cuts was 5 mm, the distance between the rows of the cuts was 12.5 mm, and the depth of the cut was the depth at which the fibers of the prepreg were completely cut.
なお、この切れ目は上記のような（Ａ）のパターンに
刃を配置した抜き刃を油圧プレスに装着して打ち抜くこ
とにより設けた。The cuts were made by mounting a punching blade having the blades arranged in the pattern (A) as described above on a hydraulic press and punching.
次に、切れ目を設けたプリプレグを８枚積み重ね積層
体を形成した。積層時のプリプレグの繊維方向は、１枚
目のプリプレグの繊維方向を０°とし、その上に順次45
°,90°,135°,135°,90°,45°,0°と45°ずつずらし
た。なお、この積層体の厚さは1.6mmである。Next, eight prepregs having cuts were stacked to form a laminated body. The fiber direction of the prepreg at the time of lamination shall be 0 ° for the fiber direction of the first prepreg, and then 45
They were shifted by °, 90 °, 135 °, 135 °, 90 °, 45 °, 0 ° and 45 °. The thickness of this laminate is 1.6 mm.
次に、この積層体を上記０°方向が長辺方向になるよ
うに、200mm×100mmの長方形状に切断した。Next, this laminate was cut into a rectangle of 200 mm × 100 mm so that the 0 ° direction was the long side direction.
次いで、この積層体を250mm×150mm×1mmの平板を成
形するための金型内の中央に投入し、第２表に示す成形
条件で平板状FRTPを作製した。Next, this laminated body was put into the center of a mold for molding a flat plate of 250 mm × 150 mm × 1 mm, and a flat FRTP was prepared under the molding conditions shown in Table 2.
この平板状FRTPの長辺方向を０°方向として、その０
°,45°,90°方向についての曲げ物性を測定した。なお
その測定条件は、試験片サイズの長さ80mm、巾15mm、ス
パン間距離50mm、載荷スピード1mm/分とした。The long side direction of this flat FRTP is defined as 0 °, and its 0
The bending properties in the directions of °, 45 ° and 90 ° were measured. The measurement conditions were a test piece size of length 80 mm, width 15 mm, span distance 50 mm, and loading speed 1 mm / min.
また成形時のプリプレグの流動性の評価は、成形後、
金型内にプリプレグが完全に充填しているか否かにより
行なった。Also, the evaluation of the fluidity of the prepreg during molding is
It was carried out depending on whether or not the prepreg was completely filled in the mold.
上記の曲げ物性および流動性評価の結果について、第
２表に示す。Table 2 shows the results of the above-mentioned evaluation of bending properties and fluidity.
実施例２ プリプレグｂを使用する以外は、実施例１と全く同様
にして成形板を得た。Example 2 A molded plate was obtained in exactly the same manner as in Example 1 except that prepreg b was used.
この成形板の強度、流動性の評価結果を第２表に示
す。Table 2 shows the evaluation results of the strength and fluidity of this molded plate.
実施例３ プリプレグｃを用いて、第１図（Ｂ）に示すようなパ
ターンで切れ目を設けた。Example 3 Using prepreg c, cuts were made in a pattern as shown in FIG. 1 (B).
なお、その切れ目は先に述べたように、切れ目の長さ
が5mmで、切れ目と切れ目の間隔は、切れ目の長さの３
倍の15mmで、切れ目の列と切れ目の列との間隔は8mm
で、切れ目の深さはプリプレグの繊維を完全に切断する
深さとした。As described above, the cut has a length of 5 mm, and the distance between the cuts is 3 mm of the length of the cut.
Doubled at 15mm, and the gap between the rows of breaks is 8mm
The depth of the cut is the depth at which the fibers of the prepreg are completely cut.
なお、この切れ目は上記のような（Ｂ）のパターンに
刃を配置した抜き刃を、油圧プレスに装着して打ち抜く
ことにより設けた。In addition, this cut was provided by mounting a punching blade having the blades arranged in the pattern (B) as described above on a hydraulic press and punching.
この切れ目の入ったプリプレグを、実施例１と全く同
様な方法で積層体とした。この積層体を第２表に示す成
形条件で、実施例１と同様な方法で250mm×150mm×1mm
の平板を成形した。この成形板の曲げ物性、流動性を実
施例１と同様な方法で評価した。The cut prepreg was formed into a laminated body in the same manner as in Example 1. This laminate was molded under the molding conditions shown in Table 2 in the same manner as in Example 1 with a size of 250 mm × 150 mm × 1 mm.
A flat plate was molded. The bending properties and fluidity of this molded plate were evaluated in the same manner as in Example 1.
その評価結果を第２表に示す。 The evaluation results are shown in Table 2.
実施例４ プリプレグｄを用いる以外は、実施例３と全く同様に
して、成形板を得た。Example 4 A molded plate was obtained in exactly the same manner as in Example 3 except that prepreg d was used.
この成形板の強度、流動性の評価結果を第２表に示
す。Table 2 shows the evaluation results of the strength and fluidity of this molded plate.
実施例５ プリプレグｅを用いて、第１図（Ｃ）に示すようなパ
ターンで切れ目を入れた。Example 5 Using prepreg e, cuts were made in a pattern as shown in FIG. 1 (C).
なお、その切れ目は先に述べたように、切れ目の長さ
が5mmで、切れ目と切れ目の間隔も５×nmm（ｎ＝1,2,
3）の範囲で任意とし、切れ目の列と切れ目の列の間隔
は５〜8mmの範囲で任意とし、切れ目の深さはプリプレ
グの繊維を完全に切断する深さとした。As described above, the cut has a length of 5 mm and the distance between the cuts is 5 × nmm (n = 1,2,
The range of 3) was arbitrary, the interval between the rows of cuts was 5 to 8 mm, and the depth of the cuts was the depth at which the fibers of the prepreg were completely cut.
なお、この切れ目は上記のような（Ｃ）のパターンに
刃を配置した抜き刃を、油圧プレスに装置して打ち抜く
ことにより設けた。In addition, this break was provided by punching out a punching blade in which the blades are arranged in the pattern (C) as described above by using a hydraulic press.
この切れ目の入ったプリプレグを実施例１と同様な方
法で積層体とし、第２表に示す成形条件で、実施例１と
同様にして、250mm×150mm×1mmの平板を成形した。This cut prepreg was formed into a laminate by the same method as in Example 1, and a flat plate of 250 mm × 150 mm × 1 mm was formed in the same manner as in Example 1 under the forming conditions shown in Table 2.
この成形板の曲げ物性、流動性を実施例１と同様な方
法で評価した。評価結果を第２表に示す。The bending properties and fluidity of this molded plate were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 2.
実施例６ プリプレグｆを使用することと、成形条件を第２表に
示す条件とする以外は実施例５と同様にして、成形板を
得、曲げ物性、流動性を評価した。評価結果を第２表に
示す。Example 6 A molded plate was obtained in the same manner as in Example 5 except that the prepreg f was used and the molding conditions were those shown in Table 2, and the bending properties and fluidity were evaluated. The evaluation results are shown in Table 2.
なお、実施例１〜６における曲げ物性はほとんどばら
つきがなく、また流動性も良好であった。The bending properties in Examples 1 to 6 were almost uniform and the fluidity was good.
比較例１〜６ 実施例１〜６で用いたと同じプリプレグａ〜ｆを、そ
の繊維方向が長辺となるような長さ25mm、巾5mmの短冊
形状に切断した。Comparative Examples 1 to 6 The same prepregs a to f used in Examples 1 to 6 were cut into a strip shape having a length of 25 mm and a width of 5 mm such that the fiber direction was the long side.
次に、実施例１〜６で用いた金型内の中央に、実施例
１〜６の積層体と同重量の短冊状プリプレグを、実施例
１〜６と同面積になるように積み重ね、第３表に示す条
件で250mm×150mm×1mmの平板を形成した。Next, in the center of the mold used in Examples 1 to 6, strip-shaped prepregs having the same weight as the laminates of Examples 1 to 6 were stacked to have the same area as Examples 1 to 6, A flat plate of 250 mm × 150 mm × 1 mm was formed under the conditions shown in Table 3.
次に、実施例１〜６と同様にして、この成形板の曲げ
物性、流動性を実施例１と同様な方法で評価した。その
評価結果を第３表に示す。Next, in the same manner as in Examples 1 to 6, the bending properties and fluidity of this molded plate were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 3.
この比較例１〜６は実施例１〜６と比較して０°,45
°,90°方向の強度のばらつきが大きい。また、比較例
５において充填不良が発生した。These Comparative Examples 1 to 6 are 0 °, 45 compared to Examples 1 to 6.
There are large variations in strength in the ° and 90 ° directions. Also, in Comparative Example 5, defective filling occurred.
第１図（Ａ）〜（Ｃ）は本発明の切れ目のパターンの種
々の具体例を示す図、第２図（Ａ）、（Ｂ）は本発明の
切れ目の深さの具体例を示す断面図である。 １……プリプレグの繊維方向、２……プリプレグ、３…
…切れ目、４……短冊形状のプリプレグ断片、５……樹
脂部分、６……繊維部分。1 (A) to 1 (C) are views showing various specific examples of the cut pattern of the present invention, and FIGS. 2 (A) and 2 (B) are cross sections showing specific examples of the depth of the cut of the present invention. It is a figure. 1 ... Prepreg fiber direction, 2 ... prepreg, 3 ...
… Slits, 4 …… Strip-shaped prepreg fragments, 5 …… Resin part, 6 …… Fiber part.
Claims (2)
性樹脂を含浸してなるシート状プリプレグを複数枚積み
重ねて成形する繊維強化熱可塑性プラスチックの製造法
において、該プリプレグ上に、繊維を横切る方向で、繊
維を切断する深さの切れ目を有することを特徴とする繊
維強化熱可塑性プラスチックの製造法。1. A method for producing a fiber-reinforced thermoplastic, comprising stacking a plurality of sheet-like prepregs obtained by impregnating a reinforcing fiber arranged in one direction with a thermoplastic resin, and molding the prepregs. A process for producing a fiber-reinforced thermoplastic, characterized in that it has a cut in the direction across the fiber and at a depth at which the fiber is cut.
目と切れ目の間隙が切れ目方向において２〜30mmである
切れ目の列を成し、かつ該列同士の間隙が５〜100mmで
ある特許請求の範囲第１項記載の繊維強化熱可塑性プラ
スチックの製造法。2. The cut has a length of 2 to 10 mm, and the cut forms a row of cuts having a gap of 2 to 30 mm in the cut direction, and the gap between the rows is 5 to 100 mm. A method for producing a fiber reinforced thermoplastic according to claim 1.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62079715A JPH085079B2 (en) | 1987-04-02 | 1987-04-02 | Method for producing fiber-reinforced thermoplastics |
| US07/351,533 US4990207A (en) | 1987-04-02 | 1989-05-15 | Process for preparing fiber-reinforced thermoplastic molded articles |
| CA000599749A CA1334160C (en) | 1987-04-02 | 1989-05-16 | Process for preparing fiber-reinforced thermoplastic molded articles |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62079715A JPH085079B2 (en) | 1987-04-02 | 1987-04-02 | Method for producing fiber-reinforced thermoplastics |
| CA000599749A CA1334160C (en) | 1987-04-02 | 1989-05-16 | Process for preparing fiber-reinforced thermoplastic molded articles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63247012A JPS63247012A (en) | 1988-10-13 |
| JPH085079B2 true JPH085079B2 (en) | 1996-01-24 |
Family
ID=25672727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62079715A Expired - Lifetime JPH085079B2 (en) | 1987-04-02 | 1987-04-02 | Method for producing fiber-reinforced thermoplastics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH085079B2 (en) |
Cited By (1)
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|---|---|---|---|---|
| JP2014210932A (en) * | 2006-05-22 | 2014-11-13 | ウメコ・ストラクチュアル・マテリアルズ（ダービー）・リミテッドＵｍｅｃｏ Ｓｔｒｕｃｔｕａｌ Ｍａｔｅｒｉａｌｓ（Ｄｅｒｂｙ）Ｌｉｍｉｔｅｄ | Moulding materials |
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|---|---|---|---|---|
| CN101516589B (en) | 2006-09-28 | 2012-06-27 | 东丽株式会社 | Process for producing composite prepreg base, layered base, and fiber-reinforced plastic |
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| JP5167953B2 (en) * | 2008-05-27 | 2013-03-21 | 東レ株式会社 | Laminated substrate, fiber reinforced plastic, and production method thereof |
| JP5292972B2 (en) * | 2008-07-30 | 2013-09-18 | 東レ株式会社 | Manufacturing method of fiber reinforced plastic |
| US8696965B2 (en) * | 2008-10-20 | 2014-04-15 | Cytec Technology Corp. | Prepregs with improved processing |
| JP5653683B2 (en) * | 2010-08-19 | 2015-01-14 | 大王製紙株式会社 | Reinforcing sheet and sheet-like structural material using the same |
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| JP6066174B2 (en) * | 2012-11-07 | 2017-01-25 | 三菱レイヨン株式会社 | Laminated substrate of fiber reinforced plastic and method for producing the same |
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| CN105793030B (en) | 2013-12-03 | 2017-09-22 | 三菱化学株式会社 | Fiber Reinforced Resin Laminates |
| US20170190123A1 (en) | 2014-02-14 | 2017-07-06 | Mitsubishi Rayon Co., Ltd. | Fiber-reinforced plastic and production method therefor |
| JP2016087907A (en) * | 2014-11-04 | 2016-05-23 | 三菱レイヨン株式会社 | Method for producing fiber-reinforced plastic |
| US10596778B2 (en) * | 2015-04-13 | 2020-03-24 | Howard E. Crawford, III | Fiber-reinforced composite material |
| CN112277226B (en) | 2015-08-04 | 2023-02-21 | 三菱化学株式会社 | fiber reinforced plastic |
| JP2017043672A (en) * | 2015-08-25 | 2017-03-02 | 三菱レイヨン株式会社 | Composite material for thermoforming |
| CN108350201B (en) | 2015-10-27 | 2021-07-20 | 东丽株式会社 | Notched prepreg, orthogonally laid laminate, and method of manufacturing notched prepreg |
| JP2017144567A (en) * | 2016-02-15 | 2017-08-24 | 東レ株式会社 | Thermoplastic resin molded body |
| AU2017330685A1 (en) | 2016-09-26 | 2018-12-06 | Toray Industries, Inc. | Notched prepreg and method for producing notched prepreg |
| EP4230398A1 (en) | 2017-01-20 | 2023-08-23 | Mitsui Chemicals, Inc. | Laminate and tape winding pipe |
| JP7507890B2 (en) * | 2020-12-28 | 2024-06-28 | 三菱重工業株式会社 | Fiber-reinforced sheet laminate, method for producing fiber-reinforced sheet laminate, and method for producing structure |
| JP7748185B2 (en) * | 2021-02-19 | 2025-10-02 | 倉敷紡績株式会社 | Method for manufacturing fiber-reinforced hollow molding |
-
1987
- 1987-04-02 JP JP62079715A patent/JPH085079B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014210932A (en) * | 2006-05-22 | 2014-11-13 | ウメコ・ストラクチュアル・マテリアルズ（ダービー）・リミテッドＵｍｅｃｏ Ｓｔｒｕｃｔｕａｌ Ｍａｔｅｒｉａｌｓ（Ｄｅｒｂｙ）Ｌｉｍｉｔｅｄ | Moulding materials |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63247012A (en) | 1988-10-13 |
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