JPH08269809A - Helmet - Google Patents
HelmetInfo
- Publication number
- JPH08269809A JPH08269809A JP7072907A JP7290795A JPH08269809A JP H08269809 A JPH08269809 A JP H08269809A JP 7072907 A JP7072907 A JP 7072907A JP 7290795 A JP7290795 A JP 7290795A JP H08269809 A JPH08269809 A JP H08269809A
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing
- helmet
- fibers
- fiber
- cap body
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、繊維強化樹脂製のヘル
メットに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a helmet made of fiber reinforced resin.
【０００２】[0002]
【従来の技術】工事現場で作業するときや自動二輪車等
に乗車するときに頭部保護のために着用するヘルメット
として、繊維強化樹脂（以下、ＦＲＰという）製のヘル
メットは軽量性に優れている点で多く使用されている。
このＦＲＰ製ヘルメットの補強繊維として、単に短繊維
を樹脂中に分散させただけでは補強効果が低いため、織
物にして配置することにより一層補強効果を高めるよう
にしたものが使用されている。2. Description of the Related Art A helmet made of fiber reinforced resin (hereinafter referred to as FRP) is excellent in lightness as a helmet worn for head protection when working on a construction site or riding a motorcycle or the like. Used in many ways.
As the reinforcing fiber of this FRP helmet, since the reinforcing effect is low if the short fibers are simply dispersed in the resin, a fiber which is arranged as a woven fabric to further enhance the reinforcing effect is used.
【０００３】しかるに、従来のＦＲＰ製ヘルメットは、
上記のように補強繊維織物を複数枚層状に重ねて使用す
る場合には、いわゆる疑似等方性の剛性にするのがよい
との考えから、実開昭６３−１４００２７号公報に開示
されるように、層間において補強繊維の配列方向を一致
させずに、互いに交差する関係にするのがよいとされて
いた。However, the conventional FRP helmet is
As described above, in the case of using a plurality of reinforcing fiber woven fabrics in a layered manner, it is preferable to have so-called pseudo-isotropic rigidity, and as disclosed in Japanese Utility Model Laid-Open No. 63-140027. It has been said that it is preferable that the reinforcing fibers should be arranged in such a manner that the reinforcing fibers are arranged in mutually intersecting directions, instead of being aligned in the same direction.
【０００４】しかし、本発明者が検討した結果による
と、上述のように層間において補強繊維の方向を交差さ
せた関係にすると、ヘルメットが衝撃により変形したと
き、補強繊維が配列している方向には変形しにくいが、
補強繊維が配列していない繊維間の方向は変形しやすい
ため、各層境目の層間に大きな応力差が発生して、層間
剥離を起こしやすくなるということがわかった。However, according to the result of the study by the present inventor, in the relationship in which the directions of the reinforcing fibers are crossed between the layers as described above, when the helmet is deformed by an impact, the reinforcing fibers are arranged in the direction in which they are arranged. Is hard to deform, but
It was found that the direction between the fibers in which the reinforcing fibers are not arranged is easily deformed, so that a large stress difference occurs between the layers at the boundary between the layers, which facilitates delamination.
【０００５】このような層間剥離は、例えば自動二輪車
が転倒したときのように、ヘルメットが道路面に続けて
２度以上打ちつけられる場合、最初の衝撃で層間剥離が
発生すると、２回目の衝撃で破壊してしまうことがある
という問題がある。Such delamination occurs when the helmet is struck twice or more in succession on the road surface, for example, when the motorcycle falls, and when delamination occurs in the first impact, it occurs in the second impact. There is a problem that it may be destroyed.
【０００６】[0006]
【発明が解決しようとする課題】本発明の目的は、ＦＲ
Ｐ本来の軽量性を阻害することなく、衝撃による補強繊
維織物の層間剥離を発生しにくくするＦＲＰ製のヘルメ
ットを提供することにある。DISCLOSURE OF INVENTION Problems to be Solved by the Invention
An object of the present invention is to provide a helmet made of FRP in which the delamination of the reinforcing fiber woven fabric due to impact is less likely to occur without impairing the original lightness of P.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成する本発
明は、補強繊維が無作為に分散した補強マットを最外層
に配置し、この補強マットの内側に、複数枚の補強繊維
織物を層間で補強繊維の配列方向が実質的に一致するよ
うに積層配置した繊維強化樹脂製帽体から構成したこと
を特徴とするものである。According to the present invention to achieve the above object, a reinforcing mat in which reinforcing fibers are randomly dispersed is arranged in the outermost layer, and a plurality of reinforcing fiber woven fabrics are placed inside the reinforcing mat. In addition, it is characterized in that it is composed of a fiber-reinforced resin cap body laminated and arranged so that the arrangement directions of the reinforcing fibers substantially coincide with each other.
【０００８】このように補強マットを最外層に配置する
ことにより、ヘルメットに作用する衝撃エネルギーを最
外層で分散させるようにし、かつヘルメット表面の平滑
性を向上することができる。また、補強繊維織物の補強
繊維の配列方向を層間において実質的に一致させたこと
により、衝撃により繊維強化樹脂製帽体が変形したとき
各層をそれぞれ同じように変形させ、層間に大きな応力
差を発生させないため、層間剥離を起こしにくくするこ
とができる。By arranging the reinforcing mat in the outermost layer in this way, the impact energy acting on the helmet can be dispersed in the outermost layer, and the smoothness of the helmet surface can be improved. Also, by making the arranging directions of the reinforcing fibers of the reinforcing fiber woven fabric substantially the same between the layers, when the fiber reinforced resin cap body is deformed by impact, each layer is deformed in the same manner, and a large stress difference is generated between the layers. Since it does not occur, delamination can be made difficult to occur.
【０００９】以下、本発明を図に示す実施例に基づいて
説明する。図１は、本発明の実施例からなるヘルメット
を構成するＦＲＰ製帽体を示すものである。図におい
て、１はヘルメット用のＦＲＰ製帽体である。このＦＲ
Ｐ製帽体１は、最外層に短繊維にカットされた補強繊維
が無作為に分散した補強マット２を配置し、その内側に
２枚の補強繊維織物３，４が層状に積層されることによ
り構成されている。この２枚の補強繊維織物３，４は、
その補強繊維３ａ，４ａの方向が実質的に同一方向にな
るように配列されている。The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 shows a FRP cap body that constitutes a helmet according to an embodiment of the present invention. In the figure, 1 is a FRP cap body for a helmet. This FR
The P cap body 1 has a reinforcing mat 2 in which reinforcing fibers cut into short fibers are randomly dispersed in the outermost layer, and two reinforcing fiber woven fabrics 3 and 4 are laminated in layers inside the reinforcing mat 2. It is composed by. These two reinforcing fiber fabrics 3 and 4 are
The reinforcing fibers 3a and 4a are arranged so that the directions thereof are substantially the same.
【００１０】上述のようにＦＲＰ製帽体を構成する補強
マットと補強繊維織物の補強繊維としては、補強効果を
有する繊維であれば特に限定されないが、好ましくは炭
素繊維、ガラス繊維、アラミド繊維、ポリビニルアルコ
ール繊維などの高強度、高弾性率或いは高強度、高伸度
のものがよい。これらのなかでも、織物を構成する補強
繊維としては、高強度・高弾性率の炭素繊維または高強
度・高伸度のガラス繊維が好ましい。As described above, the reinforcing mat of the FRP cap body and the reinforcing fiber of the reinforcing fiber woven fabric are not particularly limited as long as they have a reinforcing effect, but preferably carbon fiber, glass fiber, aramid fiber, Polyvinyl alcohol fiber or the like having high strength, high elastic modulus or high strength and high elongation is preferable. Among these, as the reinforcing fibers constituting the woven fabric, carbon fibers having high strength and high elastic modulus or glass fibers having high strength and high elongation are preferable.
【００１１】また、マトリックス樹脂としては、補強マ
ットおよび補強繊維織物とも、エポキシ樹脂、不飽和ポ
リエステル樹脂、ビニルエステル樹脂、フェノール樹脂
等の熱硬化性樹脂が使用されるが、ポリアミド樹脂、ポ
リブチレンテレフタレート樹脂、ＡＢＳ樹脂、ポリエー
テルエーテルケトン樹脂、ポリフェニレンサルファイド
樹脂、ポリ−４−メチルペンテン−１樹脂、ポリプロピ
レン樹脂などの熱可塑性樹脂も使用することができる。As the matrix resin, thermosetting resins such as epoxy resin, unsaturated polyester resin, vinyl ester resin, and phenol resin are used for both the reinforcing mat and the reinforcing fiber woven fabric, and polyamide resin, polybutylene terephthalate are used. Thermoplastic resins such as resins, ABS resins, polyetheretherketone resins, polyphenylene sulfide resins, poly-4-methylpentene-1 resins and polypropylene resins can also be used.
【００１２】本発明において、補強マットの補強繊維
は、マトリックス樹脂中に無作為に分散していれば形態
は特に限定されず、所定長に切断した短繊維であっても
よく、またループ状に配列した連続繊維であってもよ
い。本発明において、補強繊維織物は上記補強マットの
内側に複数枚、好ましくは２枚が積層されて補強層を構
成するが、その複数枚の補強繊維織物は、隣接する層間
での補強繊維の配向方向を互いに一致するようにする。In the present invention, the reinforcing fibers of the reinforcing mat are not particularly limited in form as long as they are randomly dispersed in the matrix resin, and may be short fibers cut into a predetermined length, or in a loop shape. It may be an array of continuous fibers. In the present invention, a plurality of, preferably two, reinforcing fiber woven fabrics are laminated inside the above-mentioned reinforcing mat to form a reinforcing layer. The plurality of reinforcing fiber woven fabrics have orientation of reinforcing fibers between adjacent layers. Make the directions match each other.
【００１３】いわゆる疑似等方性の配置として、補強繊
維織物の補強繊維の配向角度を一層目を０°と９０°に
するのに対して、二層目を±４５°のようにずらした配
置にすると、衝撃によりヘルメット帽体が変形したと
き、補強繊維の配列した方向には変形しにくいが、繊維
が配列していない中間の方向は変形しやすいため、各層
境目の層間に大きな応力を発生して層間剥離を起こしや
すくなるが、上記のように層間の補強繊維の配列方向を
一致させることにより、各層をそれぞれ同じように変形
させ、層間に大きな応力差を発生しないため層間剥離を
起こしにくくするのである。As a so-called pseudo-isotropic arrangement, the orientation angles of the reinforcing fibers of the reinforcing fiber fabric are 0 ° and 90 ° for the first layer, while the second layer is displaced by ± 45 °. When it is set, when the helmet cap body is deformed by impact, it is difficult to deform in the direction in which the reinforcing fibers are arranged, but it is easy to deform in the middle direction where the fibers are not arranged, so large stress is generated between the layers of each layer boundary. Delamination is more likely to occur, but by aligning the reinforcing fiber arrangement directions between layers as described above, each layer is deformed in the same way and a large stress difference does not occur between layers, so delamination is less likely to occur. To do.
【００１４】補強繊維織物の織組織としては、平織、朱
子織、綾織、畝織などいずれも使用可能である。なかで
も平織は特に好ましく、経糸と緯糸との拘束力が大きい
ので、帽体の貫通衝撃性能を向上させることができる。
また平織は、経糸と緯糸とが交互に交錯する交錯部の数
が多いので、衝撃エネルギーの多くをその交錯部に集中
させてマトリックス樹脂の破壊に消費させることがで
き、補強繊維の切断を起こしにくくすることができる。As the woven structure of the reinforcing fiber woven fabric, any of plain weave, satin weave, twill weave, ridge weave and the like can be used. Among them, plain weave is particularly preferable, and since the binding force between the warp and the weft is large, the penetration impact performance of the cap body can be improved.
Further, since the plain weave has a large number of intersecting portions where warps and wefts are alternately intersected with each other, most of the impact energy can be concentrated in the intersecting portions and consumed for the destruction of the matrix resin, and the reinforcing fibers are cut. Can be hardened.
【００１５】補強繊維織物の目付としては、１００〜４
００ｇ／ｍ2 の範囲が好ましい。目付が１００ｇ／ｍ2
よりも小さいと、所定の衝撃特性を満足するヘルメット
にするには織物の積層数を多くしなければならず、成形
作業性を低下させることになる。また、４００ｇ／ｍ2
を越えると、織物の厚みが増大するので樹脂含浸性が悪
くなり、ひいては良好な衝撃吸収能や耐貫通性が得られ
なくなる。The basis weight of the reinforcing fiber fabric is 100 to 4
A range of 00 g / m 2 is preferred. Basis weight is 100 g / m 2
If it is smaller than this, the number of layers of the woven fabrics must be increased in order to obtain a helmet satisfying the predetermined impact characteristics, and the workability of molding is deteriorated. Also, 400 g / m 2
If it exceeds the range, the thickness of the woven fabric increases, so that the resin impregnation property deteriorates, and thus good impact absorbing ability and penetration resistance cannot be obtained.
【００１６】上述した構成からなるＦＲＰ帽体を成形す
るには、例えば帽体の母型に一定長に切断した短繊維を
バインダー樹脂と共に吹き付けて帽体形状をした補強マ
ットを作製し、次いでこの補強マットを加熱した分割可
能な雌金型内にセットし、さらにその内側に複数枚の補
強繊維織物を配置し、かつそれに熱硬化性樹脂を浸漬さ
せ、これを加熱された雄金型で加圧硬化するようにすれ
ばよい。In order to mold the FRP cap body having the above-mentioned structure, for example, short fibers cut into a certain length are blown together with a binder resin on a mother die of the cap body to prepare a cap body-shaped reinforcing mat, and then the reinforcing mat is formed. The reinforcing mat is set in a heated dividable female mold, a plurality of reinforcing fiber fabrics are placed inside the dipping mat, and a thermosetting resin is dipped in it, which is then heated by a heated male mold. It may be pressure-hardened.
【００１７】このように成形されたＦＲＰ帽体に、ハン
モック、ヘッドバンド、環ひも等の着装体を取り付ける
と作業用のヘルメットになり、さらに内部に硬質発泡プ
ラスチック等の衝撃吸収ライナーを配置すれば自動二輪
車用等の乗物用のヘルメットにすることができる。By attaching a wearing body such as a hammock, a head band, and a string to the FRP cap body thus formed, a working helmet can be obtained. Further, by arranging a shock absorbing liner such as hard foamed plastic inside the helmet. It can be used as a helmet for vehicles such as motorcycles.
【００１８】[0018]
【実施例】ガラスロービングをカッターで２５mmの長さ
に裁断しながら、帽体賦形型の内側にバインダー（熱可
塑樹脂）とともに吹き付けて、帽体基材を作製した。こ
の時の帽体基材の重量は７０ｇであった。次に、この帽
体基材を１２０℃に加熱した成形用雌型に移し、その内
側に、目付２００ｇ／ｍ2 の炭素繊維織物２枚をその炭
素繊維の配列方向が一致するように積層配置した。さら
に、この織物構造体の内側にガラス繊維に熱可塑バイン
ダーを付着させた補強マットを接着させ、炭素繊維織物
とガラスチョップドストランドマットとが積層した成形
用プリフォームを作製した。Example A glass roving was cut with a cutter to a length of 25 mm and sprayed together with a binder (thermoplastic resin) on the inside of a cap shaping mold to prepare a cap body base material. At this time, the weight of the cap body base material was 70 g. Next, the cap body base material was transferred to a molding die heated to 120 ° C., and two carbon fiber woven fabrics having a basis weight of 200 g / m 2 were laminated inside so that the carbon fiber arrangement directions were the same. did. Further, a reinforcing mat having glass fibers and a thermoplastic binder attached thereto was adhered to the inside of this woven structure to produce a molding preform in which a carbon fiber woven fabric and a glass chopped strand mat were laminated.
【００１９】この成形用プリフォームにビニルエステル
樹脂を２００ｇ入れ、１２０℃に加熱した雄型で加圧し
てプリフォームに樹脂を含浸させ、そのまま５分間保持
して樹脂を硬化させた。その後、金型を分割しＦＲＰ帽
体を取り出し、不要部分を切除してヘルメット用帽体を
得た。この帽体の重量は２０５ｇであった。さらに、こ
のＦＲＰ帽体の内側に内装材を取り付けて作業用ヘルメ
ットを作製した（以下、帽体Ａという）。200 g of a vinyl ester resin was put in this molding preform, and the preform was impregnated with the resin by pressurizing with a male mold heated to 120 ° C., and then held for 5 minutes to cure the resin. Then, the mold was divided, the FRP cap body was taken out, and unnecessary portions were cut off to obtain a helmet cap body. The weight of this cap body was 205 g. Further, an interior material was attached to the inside of the FRP cap body to manufacture a work helmet (hereinafter referred to as a cap body A).
【００２０】一方、比較のために、織物の繊維配列方向
が交差するように配置した他は帽体Ａと同様にして作業
用ヘルメットを作製した（以下、帽体Ｂという）。次
に、これら２個の帽体Ａ，Ｂの衝撃吸収性と耐貫通性の
試験を、それぞれＪＩＳ Ｔ−８１３１の規定に準じて
行った。衝撃吸収性の試験は、前処理として５０℃で２
時間放置した帽体に、５kgの平面形ストライカを１００
０mmの高さからヘルメットの頂部に自由落下させたと
き、人頭模型に伝わる衝撃力を測定して評価した。ま
た、耐貫通性の試験は、１．８kgの鋼製ストライカを６
００mmの高さから落下させときの貫通の有無を判定し
た。On the other hand, for comparison, a working helmet was produced in the same manner as the cap body A (hereinafter referred to as the cap body B), except that the fabrics were arranged so that the fiber arrangement directions intersect each other. Next, the tests of the impact absorption and the penetration resistance of these two cap bodies A and B were carried out in accordance with the regulations of JIS T-8131. The shock absorption test was conducted at 50 ° C as a pretreatment.
100 kg of a 5 kg flat striker on the cap body that was left for a while
The impact force transmitted to the human head model was measured and evaluated when it freely dropped from the height of 0 mm to the top of the helmet. In addition, the penetration resistance test was conducted using a 1.8 kg steel striker.
The presence or absence of penetration when dropped from a height of 00 mm was determined.
【００２１】試験の結果を表１に示す。衝撃試験の後、
二つの帽体Ａ，Ｂを分解して、２枚の炭素繊維織物間の
層間剥離の状況を観察したところ、帽体Ａには全く認め
られなかったが、帽体Ｂには認められた。The test results are shown in Table 1. After the impact test,
When the two cap bodies A and B were disassembled and the state of delamination between the two carbon fiber woven fabrics was observed, nothing was found in the cap body A, but it was found in the cap body B.
【００２２】[0022]
【表１】 [Table 1]
【００２３】[0023]
【発明の効果】上述したように、本発明のＦＲＰ製ヘル
メットは、補強マットを最外層に配置したことにより、
ヘルメットに作用する衝撃エネルギーを最外層で分散さ
せ、かつヘルメット表面の平滑性を向上させることがで
きる。そのうえ補強繊維織物の補強繊維の配列方向を層
間において実質的に一致させたことにより、衝撃により
ヘルメットが変形したとき各層をそれぞれ同じように変
形させて層間に大きな応力差を発生させないため、層間
剥離を起こしにくくすることができる。As described above, in the FRP helmet of the present invention, the reinforcing mat is arranged in the outermost layer,
The impact energy acting on the helmet can be dispersed at the outermost layer, and the smoothness of the helmet surface can be improved. Moreover, by making the arranging directions of the reinforcing fibers of the reinforcing fiber fabric substantially the same between the layers, when the helmet is deformed by impact, each layer is not deformed in the same way and a large stress difference is not generated between the layers. Can be hard to cause.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の実施例からなるヘルメットを構成する
ＦＲＰ帽体を、一部破断して示す斜視図である。FIG. 1 is a partially cutaway perspective view showing an FRP cap body that constitutes a helmet according to an embodiment of the present invention.
１ 繊維強化樹脂製帽体 ２ 補強マット ３，４ 補強繊維織物 1 Fiber-reinforced resin cap 2 Reinforcing mat 3,4 Reinforcing fiber fabric
Claims (3)
を最外層に配置し、この補強マットの内側に、複数枚の
補強繊維織物を層間で補強繊維の配列方向が実質的に一
致するように積層配置した繊維強化樹脂製帽体から構成
したヘルメット。1. A reinforcing mat in which reinforcing fibers are randomly dispersed is arranged in the outermost layer, and a plurality of reinforcing fiber woven fabrics are arranged inside the reinforcing mat so that the arrangement directions of the reinforcing fibers are substantially the same. A helmet composed of fiber-reinforced resin caps stacked on top of each other.
１に記載のヘルメット。2. The helmet according to claim 1, wherein the reinforcing fiber fabric is a plain fabric.
はガラス繊維である請求項１または２に記載のヘルメッ
ト。3. The helmet according to claim 1, wherein the fibers of the reinforcing fiber fabric are carbon fibers or glass fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7072907A JPH08269809A (en) | 1995-03-30 | 1995-03-30 | Helmet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7072907A JPH08269809A (en) | 1995-03-30 | 1995-03-30 | Helmet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08269809A true JPH08269809A (en) | 1996-10-15 |
Family
ID=13502902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7072907A Pending JPH08269809A (en) | 1995-03-30 | 1995-03-30 | Helmet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08269809A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6649181B1 (en) | 2002-05-29 | 2003-11-18 | Unilever Home & Personal Care Usa, Division Of Conopco, Inc. | Cosmetic adhesive strip |
| JP2005256186A (en) * | 2004-03-09 | 2005-09-22 | Toray Ind Inc | Impact-resistant helmet |
| JP2006289651A (en) * | 2005-04-06 | 2006-10-26 | Victor Kogyo Kk | High strength and high function resin molded product and its manufacturing method |
| JP2010189820A (en) * | 2009-02-20 | 2010-09-02 | Zett Corp | Body protector |
| WO2013110839A1 (en) * | 2012-01-24 | 2013-08-01 | Mat Global Solutions, S.L. | Method and apparatus for manufacturing a body made of composite material provided with an inner cavity with an outward opening |
| CN108274858A (en) * | 2018-03-27 | 2018-07-13 | 山东中恒景新碳纤维科技发展有限公司 | A kind of multilayer function prepreg fabric and its preparation method and application |
-
1995
- 1995-03-30 JP JP7072907A patent/JPH08269809A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6649181B1 (en) | 2002-05-29 | 2003-11-18 | Unilever Home & Personal Care Usa, Division Of Conopco, Inc. | Cosmetic adhesive strip |
| JP2005256186A (en) * | 2004-03-09 | 2005-09-22 | Toray Ind Inc | Impact-resistant helmet |
| JP2006289651A (en) * | 2005-04-06 | 2006-10-26 | Victor Kogyo Kk | High strength and high function resin molded product and its manufacturing method |
| JP2010189820A (en) * | 2009-02-20 | 2010-09-02 | Zett Corp | Body protector |
| WO2013110839A1 (en) * | 2012-01-24 | 2013-08-01 | Mat Global Solutions, S.L. | Method and apparatus for manufacturing a body made of composite material provided with an inner cavity with an outward opening |
| ES2415739R1 (en) * | 2012-01-24 | 2014-02-12 | Mat Global Solutions, S.L. | PROCEDURE AND APPLIANCE FOR THE MANUFACTURE OF A COMPOSITE MATERIAL BODY PROVIDED WITH AN INTERIOR CAVITY WITH AN OPENING TO THE OUTSIDE |
| KR20140127828A (en) * | 2012-01-24 | 2014-11-04 | 매트 글로벌 솔루션즈, 에스.엘. | Method and apparatus for manufacturing a body made of composite material provided with an inner cavity with an outward opening |
| CN104136202A (en) * | 2012-01-24 | 2014-11-05 | 马特全球解决有限公司 | Method and apparatus for manufacturing a body made of composite material provided with an inner cavity with an outward opening |
| AU2013213498B2 (en) * | 2012-01-24 | 2017-04-20 | Mat Product & Technology, S.L.U. | Method and apparatus for manufacturing a body made of composite material provided with an inner cavity with an outward opening |
| US9833933B2 (en) | 2012-01-24 | 2017-12-05 | Mat Global Solutions, S.L. | Method and apparatus for manufacturing a body made of composite material provided with an inner cavity with an outward opening |
| CN108274858A (en) * | 2018-03-27 | 2018-07-13 | 山东中恒景新碳纤维科技发展有限公司 | A kind of multilayer function prepreg fabric and its preparation method and application |
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