JPH0798868B2 - Method for producing fiber-reinforced polypropylene resin sheet - Google Patents
Method for producing fiber-reinforced polypropylene resin sheetInfo
- Publication number
- JPH0798868B2 JPH0798868B2 JP4068325A JP6832592A JPH0798868B2 JP H0798868 B2 JPH0798868 B2 JP H0798868B2 JP 4068325 A JP4068325 A JP 4068325A JP 6832592 A JP6832592 A JP 6832592A JP H0798868 B2 JPH0798868 B2 JP H0798868B2
- Authority
- JP
- Japan
- Prior art keywords
- polypropylene resin
- resin sheet
- glass fiber
- sheet
- reinforced polypropylene
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車部品、弱電部
品、その他の工業部品や、土木建築材料などに用いられ
るガラス繊維強化ポリプロピレン樹脂シートの製造方法
に関する。本発明方法により製造されたガラス繊維強化
ポリプロピレン樹脂シートは、特に強度、剛性が優れて
いるので、バンパービーム、フロントエンドパネル、イ
ンストルメントパネル、ドアトリムなどの自動車部品、
家電製品のハウジング、パネル状土木建築材料などとし
て有用なものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a glass fiber reinforced polypropylene resin sheet used for automobile parts, light electric parts, other industrial parts, civil engineering building materials and the like. The glass fiber reinforced polypropylene resin sheet produced by the method of the present invention is particularly excellent in strength and rigidity. Therefore, automobile parts such as bumper beams, front end panels, instrument panels, and door trims,
It is useful as a housing for home electric appliances and a panel-shaped civil engineering building material.
【０００２】[0002]
【従来の技術】従来、自動車部品、弱電部品、その他の
工業部品や、土木建築材料等の分野において、製品に強
度、剛性、耐久性、寸法安定性等が要求される用途で
は、その素材として、ガラス繊維強化熱可塑性樹脂シー
ト、特にガラス繊維強化ポリプロピレン樹脂シート、或
いは、同シートを曲げ加工などによって賦形させたも
の、又は、同シートを加熱圧縮成形したもの、等が用い
られている。このようなガラス繊維強化ポリプロピレン
樹脂シートの製造方法として、粉末状又は繊維状のポリ
プロピレン樹脂と、カップリング剤、集束剤等で表面処
理を行なった不連続のガラス繊維とを、空気中又は水中
で攪拌・混合させた後、マット状に賦形して多孔質マッ
トとする方法や、或いは、これらを加熱・加圧下でポリ
プロピレン樹脂を溶融させて無孔質又は多孔質シートと
する方法（以下、これらをまとめて繊維強化ポリプロピ
レン樹脂シートという）が、連続のガラス繊維を用いる
方法と、ポリプロピレン樹脂と不連続のガラス繊維とを
溶融・混練して組成物となす方法との両者の長所を生か
し欠点を解消した方法として、数多く提案されている
（例えば、特開昭５６−１１２２９号，同５６−１８６
２１号、同５７−２８１３５号、同５７−１１７６６１
号、同５８−５９２２４号、同５９−４９９２９号、同
６０−１５８２２７号、同６０−１５８２２８号、同６
２−２０８９０６号、同６２−２９７１１３号、同６３
−１５８２２８号、特開平１−３１８０４５号、同２−
５１５３６号等の各公報参照）。そして、これらに用い
られているポリプロピレン樹脂としては、強度、剛性、
耐久性、寸法安定性等が要求されていることから、比較
的高分子量の樹脂を用いなければならないとされ、メル
トフローレート（ＭＦＲ）が０．１〜３０ｇ／１０分程
度のものを用いるのが常識であった。2. Description of the Related Art Conventionally, in the fields of automobile parts, light electric parts, other industrial parts, civil engineering building materials, etc., as a material for applications where strength, rigidity, durability, dimensional stability, etc. are required for products. , A glass fiber reinforced thermoplastic resin sheet, particularly a glass fiber reinforced polypropylene resin sheet, a sheet obtained by shaping the sheet by bending or the like, or a sheet obtained by heat compression molding the sheet is used. As a method for producing such a glass fiber reinforced polypropylene resin sheet, a powdery or fibrous polypropylene resin and a discontinuous glass fiber which has been surface-treated with a coupling agent, a sizing agent, etc., in air or in water. After stirring and mixing, a method of shaping into a mat to form a porous mat, or a method of melting these polypropylene resins under heating and pressure to form a non-porous or porous sheet (hereinafter, These are collectively referred to as a fiber-reinforced polypropylene resin sheet), and the advantages of both the method of using continuous glass fibers and the method of melting and kneading polypropylene resin and discontinuous glass fibers to form a composition are disadvantageous. There have been many proposals as a method for solving the above problem (for example, JP-A-56-11229 and JP-A-56-186).
21, No. 57-28135, No. 57-117661.
No. 58, No. 58-59224, No. 59-49929, No. 60-158227, No. 60-158228, No. 6
2-208906, 62-297113, 63
No. 158228, JP-A Nos. 1-318045 and 2-
See each publication such as No. 51536). And, as the polypropylene resin used for these, strength, rigidity,
Since it is required to have durability and dimensional stability, it is necessary to use a resin having a relatively high molecular weight, and a resin having a melt flow rate (MFR) of about 0.1 to 30 g / 10 minutes is used. Was common sense.
【０００３】[0003]
【発明が解決しようとする課題】一方、ガラス繊維強化
ポリプロピレン樹脂シートは、常温における強度、剛
性、低温における耐衝撃性、実用温度における寸法安定
性等が優れ、工業部品素材としての基本的な性能をある
程度備えているが、同シートのガラス繊維含有量がある
程度以上大きくなると強度や剛性の向上度合が低下し、
ついには強度、剛性が飽和したり、或いは、低下して、
ガラス繊維による補強効果が十分発揮されない状態とな
り、また、高温度下での強度、剛性の低下が著しく、高
温度下で使用される工業用材料としては、今一歩改良の
余地があった。本発明は、かかるガラス繊維強化ポリプ
ロピレン樹脂シートにおいて、シート中のガラス繊維含
有量が大きくても強度や剛性の向上度合の低下が小さ
く、また、高温度下での強度、剛性の低下の少ないガラ
ス繊維強化ポリプロピレン樹脂シートを提供するもので
ある。On the other hand, the glass fiber reinforced polypropylene resin sheet is excellent in strength at room temperature, rigidity, impact resistance at low temperature, dimensional stability at practical temperature, etc., and has a basic performance as a material for industrial parts. However, if the glass fiber content of the sheet increases above a certain level, the degree of improvement in strength and rigidity decreases,
Eventually, strength and rigidity will be saturated or decreased,
The reinforcing effect of the glass fiber is not sufficiently exerted, and the strength and rigidity at high temperatures are remarkably reduced, and there is room for further improvement as an industrial material used at high temperatures. The present invention, in such a glass fiber reinforced polypropylene resin sheet, even if the glass fiber content in the sheet is large, the decrease in the degree of improvement in strength and rigidity is small, and the strength and rigidity at high temperature is less glass. A fiber reinforced polypropylene resin sheet is provided.
【０００４】[0004]
【課題を解決するための手段】［発明の概要］ 本発明者らは、上記問題点に鑑みて鋭意研究を重ねた結
果、メルトフローレート（ＭＦＲ）１００〜６００ｇ／
１０分のポリプロピレン樹脂を用いることにより、シー
ト中のガラス繊維含有量が大きくても強度や剛性の向上
度合の低下が小さく、また、高温度下での強度、剛性の
低下の少ないガラス繊維強化ポリプロピレン樹脂シート
とすることができるとの知見を得て、本発明を完成する
に至ったものである。すなわち、本発明の繊維強化ポリ
プロピレン樹脂シートの製造方法は、成分（Ａ）：ポリ
プロピレン樹脂２５〜９０重量％と、成分（Ｂ）：長さ
３〜５０ｍｍのガラス繊維７５〜１０重量％とを湿式抄
造法に従い、水中にて混合・分散させた後、脱水混抄し
乾燥させてウエブを得、このウエブを加熱、加圧、冷却
して、繊維強化ポリプロピレン樹脂シートを製造する方
法において、前記成分（Ａ）がメルトフローレート（Ｍ
ＦＲ）１００〜６００ｇ／１０分の粉粒体状のポリプロ
ピレン樹脂であることを特徴とするものである。Means for Solving the Problems [Outline of the Invention] As a result of intensive studies conducted by the present inventors in view of the above problems, a melt flow rate (MFR) of 100 to 600 g /
By using a polypropylene resin for 10 minutes, even if the glass fiber content in the sheet is large, the decrease in the degree of improvement in strength and rigidity is small, and the decrease in the strength and rigidity at high temperature is small and the glass fiber reinforced polypropylene is small. The present invention has been completed based on the knowledge that it can be used as a resin sheet. That is, in the method for producing a fiber-reinforced polypropylene resin sheet of the present invention, the component (A): 25 to 90% by weight of the polypropylene resin and the component (B): 75 to 10% by weight of the glass fiber having a length of 3 to 50 mm are wet. According to the papermaking method, after mixing and dispersing in water, dehydration mixing papermaking and drying to obtain a web, the web is heated, pressurized and cooled to produce a fiber-reinforced polypropylene resin sheet, wherein the components ( A) is the melt flow rate (M
FR) 100 to 600 g / 10 minutes of a granular polypropylene resin.
【０００５】［発明の具体的説明］ ［Ｉ］ 繊維強化ポリプロピレン樹脂シートの製造 （１） 原材料成分 （ａ）ポリプロピレン樹脂（成分（Ａ）） 本発明の繊維強化ポリプロピレン樹脂シートの製造方法
において原材料として用いられる成分（Ａ）のポリプロ
ピレン樹脂としては、ポリプロピレンホモポリマー、プ
ロピレンとエチレンなどの共重合性モノマーとの共重合
体、プロピレンと酸無水物などの極性基を有するモノマ
ー（例えば、無水マレイン酸、マレイン酸、アクリル酸
等）との共重合体或いはグラフト共重合体、ポリプロピ
レン樹脂を主成分とするポリマーブレンド物やポリマー
アロイなど、或いは、これらポリプロピレン樹脂に一般
的に用いられる可塑剤、熱安定剤、光安定剤、充填剤、
染料、顔料、耐衝撃性改良材、核剤などの各種添加剤や
配合剤を添加したもの等を挙げることができ、これらは
粉粒体状の形態で使用される。[Detailed Description of the Invention] [I] Production of Fiber Reinforced Polypropylene Resin Sheet (1) Raw Material Component (a) Polypropylene Resin (Component (A)) As a raw material in the method for producing a fiber reinforced polypropylene resin sheet of the present invention. Examples of the polypropylene resin of the component (A) used include polypropylene homopolymers, copolymers of propylene and a copolymerizable monomer such as ethylene, and monomers having a polar group such as propylene and an acid anhydride (for example, maleic anhydride, Copolymers or graft copolymers with maleic acid, acrylic acid, etc.), polymer blends and polymer alloys containing polypropylene resin as a main component, or plasticizers and heat stabilizers commonly used for these polypropylene resins. , Light stabilizer, filler,
Examples thereof include dyes, pigments, impact resistance improvers, and additives to which various additives such as nucleating agents have been added and the like, and these are used in the form of powder or granules.
【０００６】メルトフローレート（ＭＦＲ） このようなポリプロピレン樹脂としては、ＪＩＳ−Ｋ７
２１０による荷重２．１６ｋｇｆ／ｃｍ2 、温度２３０
℃（条件１４）でのメルトフローレート（ＭＦＲ）の測
定で、１００〜６００ｇ／１０分、好ましくは１２０〜
５００ｇ／１０分、特に好ましくは１２０〜２５０ｇ／
１０分のものを用いることが重要である。上記ＭＦＲが
上記範囲未満のものでは、ポリプロピレン樹脂とガラス
繊維の界面の濡れが十分でないために、強度・剛性が低
くなるし、ガラス繊維含有量が４０重量％以上における
強度・剛性の向上度合いが低下したり、８０℃以上の高
温度の使用における強度・剛性の低下が顕著となる。ま
た、ＭＦＲが上記範囲を超えるものでは、強度・剛性が
低下するし、かかる繊維強化ポリプロピレン樹脂シート
の製造工程や同シートの加熱・加圧成形工程でポリプロ
ピレン樹脂の溶融状態での流動性が高すぎて、ポリプロ
ピレン樹脂とガラス繊維との分離が生じてしまう。 Melt Flow Rate (MFR) As such polypropylene resin, JIS-K7
210 load 2.16 kgf / cm 2 , temperature 230
The melt flow rate (MFR) at 100 ° C (condition 14) is 100 to 600 g / 10 min, preferably 120 to 600 g / 10 min.
500 g / 10 minutes, particularly preferably 120-250 g /
It is important to use the one for 10 minutes. When the MFR is less than the above range, the wetting of the interface between the polypropylene resin and the glass fiber is not sufficient, so the strength / rigidity becomes low, and the degree of improvement in the strength / rigidity when the glass fiber content is 40% by weight or more. The decrease in strength or rigidity becomes remarkable when used at a high temperature of 80 ° C. or higher. If the MFR exceeds the above range, the strength and rigidity will be reduced, and the fluidity of the polypropylene resin in the molten state will be high in the manufacturing process of such a fiber-reinforced polypropylene resin sheet and the heating / pressurizing step of the sheet. As a result, the polypropylene resin and the glass fiber are separated from each other.
【０００７】形 態 使用の際のポリプロピレン樹脂の形態としては、ペレッ
ト状、パウダー状、フレーク状などの紛粒体状のもので
あるが、本発明の繊維強化ポリプロピレン樹脂シートの
製造方法におけるポリプロピレン樹脂の形態としてはパ
ウダー状態であることが好ましく、特に粒径が１ｍｍ以
下、好ましくは０．１〜０．５ｍｍのパウダー状態であ
ることが好ましい。The form of the polypropylene resin in the form of use is in the form of powder such as pellets, powder, flakes, etc. The polypropylene resin in the method for producing the fiber-reinforced polypropylene resin sheet of the present invention The form is preferably in a powder state, and particularly preferably in a powder state having a particle size of 1 mm or less, preferably 0.1 to 0.5 mm.
【０００８】(b) ガラス繊維（成分(B) ） 本発明の繊維強化ポリプロピレン樹脂シートの製造方法
において原料として用いられる成分(B) のガラス繊維と
しては、単繊維状、ストランド状等で、特に長さが３〜
５０ｍｍ、好ましくは３〜２５ｍｍの不連続状のものを
用いることが重要である。このようなガラス繊維の直径
は、好ましくは３〜２５μｍ、特に好ましくは６〜２５
μｍのものである。これらのガラス繊維は、用途に応じ
てアミノシランカップリング剤、エポキシシランカップ
リング剤などのカップリング剤や、ポリビニルアルコー
ル、ポリ酢酸ビニル、ポリウレタン等の集束剤などによ
って表面処理を施したものを用いることができる。本発
明方法においては、上記ガラス繊維の他に、カーボン繊
維、アラミッド繊維、金属繊維、セラミック繊維などの
強化繊維を本発明の主旨を逸脱しない範囲で併用するこ
とができる。(B) Glass Fiber (Component (B)) The glass fiber of component (B) used as a raw material in the method for producing the fiber-reinforced polypropylene resin sheet of the present invention may be a single fiber, a strand or the like, Length is 3 ~
It is important to use a discontinuous shape of 50 mm, preferably 3 to 25 mm. The diameter of such glass fibers is preferably 3 to 25 μm, particularly preferably 6 to 25 μm.
μm. These glass fibers should be surface-treated with a coupling agent such as an aminosilane coupling agent or an epoxysilane coupling agent, or a sizing agent such as polyvinyl alcohol, polyvinyl acetate, or polyurethane, depending on the application. You can In the method of the present invention, in addition to the above glass fibers, reinforcing fibers such as carbon fibers, aramid fibers, metal fibers and ceramic fibers can be used together within the scope of the present invention.
【０００９】(c) 配合割合 成分(A) の高ＭＦＲポリプロピレン樹脂と、成分(B) の
ガラス繊維との配合割合は、成分(A) ：成分(B) ＝２５
〜９０重量％：７５〜１０重量％、好ましくは３０〜８
０重量％：７０〜２０重量％、特に好ましくは４０〜７
０重量％：６０〜３０重量％である。成分(A) の配合割
合が上記範囲未満では同シートの耐衝撃性、表面平滑性
及び同シートの成形加工性が悪化する。また、成分(A)
の配合割合が上記範囲を超えるとガラス繊維による同シ
ート及び成形品の強度・剛性の向上効果が不十分とな
る。(C) Mixing ratio The mixing ratio of the high MFR polypropylene resin of the component (A) and the glass fiber of the component (B) is as follows: component (A): component (B) = 25
~ 90 wt%: 75-10 wt%, preferably 30-8
0% by weight: 70 to 20% by weight, particularly preferably 40 to 7
0% by weight: 60 to 30% by weight. If the mixing ratio of the component (A) is less than the above range, the impact resistance, surface smoothness and molding processability of the sheet deteriorate. Also, the component (A)
If the compounding ratio of the above exceeds the above range, the effect of improving the strength and rigidity of the sheet and the molded product by the glass fiber becomes insufficient.
【００１０】（２） 混合・分散（不織布状ウェブの製
造） 本発明の繊維強化ポリプロピレン樹脂シートの製造方法
においては、前記原材料の成分（Ａ）：粉粒体状のポリ
プロピレン樹脂、例えばその粒子と、成分（Ｂ）：長さ
３〜５０ｍｍのガラス繊維、例えばそのチョップドスト
ランドとを、湿式抄造法に従い、水中にて均一に混合・
分散させた後、脱水混抄し乾燥させて不織布状のウェブ
を形成する。このような均一に混合・分散された不織布
状のウェブを形成するためには、以下に示す湿式抄造法
が採用される。湿式抄造法 前記成分（Ａ）：ポリプロピレン樹脂の粒子と成分
（Ｂ）：ガラス繊維のチョップドストランドを、界面活
性剤の存在下に水中にて攪拌し、均一に混合・分散させ
た後、脱水混抄し乾燥させてウェブを抄造する。この様
な湿式抄造法は、ガラス繊維の分散が極めて均一で、強
度・剛性・寸法特性などの諸物性のバランスに優れた繊
維強化シートが得られる。(2) Mixing / Dispersion (Production of Nonwoven Fabric Web) In the method for producing the fiber-reinforced polypropylene resin sheet of the present invention, the component (A) of the raw material is a polypropylene resin in the form of powder or granules, for example, particles thereof. Component (B): Glass fiber having a length of 3 to 50 mm, for example, chopped strand thereof is uniformly mixed in water according to a wet papermaking method.
After the dispersion, the mixed web is dehydrated and dried to form a nonwoven web. In order to form such a uniformly mixed and dispersed non-woven web, the following wet papermaking method is adopted. Wet papermaking method The component (A): polypropylene resin particles and the component (B): glass fiber chopped strands are stirred in water in the presence of a surfactant, uniformly mixed and dispersed, and then dehydrated and mixed. Then, it is dried to form a web. Such a wet papermaking method can obtain a fiber reinforced sheet in which the dispersion of glass fibers is extremely uniform and the physical properties such as strength, rigidity and dimensional characteristics are well balanced.
【００１１】(3) ガラス繊維強化熱可塑性樹脂シート
の製造 以下に湿式抄造法によるガラス繊維強化ポリプロピレン
樹脂シートの製造の一例を具体的に説明する。湿式抄造法によるガラス繊維強化ポリプロピレン樹脂シ
ートの製造 長さ３〜５０ｍｍのガラス繊維のチョップドストランド
と平均粒径０．１〜１ｍｍのポリプロピレン樹脂粉粒体
とを、予め界面活性剤を加えて攪拌し十分に泡立てた分
散槽内の液体中に投入する。該分散槽内では、強化用ガ
ラス繊維とポリプロピレン樹脂粉粒体を均一に分散させ
るための攪拌を行なう。この攪拌によりチョップドスト
ランドを開繊すると共に両者を分散させる。次いで、こ
の十分に攪拌された分散液をポンプによりメッシュ状コ
ンベアーベルトの上側に設置されたヘッドボックス内に
供給する。このヘッドボックスの下側のメッシュ状コン
ベアーベルトの下にはウェットボックスが設置されてお
り、該ウェットボックス内の圧力は負圧に保たれて、該
ヘッドボックス内の分散液をメッシュ状コンベアーベル
トを介して吸引脱水することにより、メッシュ状コンベ
アーベルト上にガラス繊維とポリプロピレン樹脂粉粒体
とが均一に分散された混抄物（ウェブ）を得る。この混
抄物（ウェブ）を熱風乾燥炉で乾燥し、更に、ダブルベ
ルトプレスを用いて該乾燥混抄物（ウェブ）をマトリッ
クスであるポリプロピレン樹脂の融点以上に加熱・溶融
した後、加圧・冷却することによってガラス繊維をポリ
プロピレン樹脂により固着させたガラス繊維強化ポリプ
ロピレン樹脂シートを得る。このときに加圧力を制御す
ることによって、ほとんど空隙を含まない無孔質のシー
ト又は多孔質の通気性シートとする。これらのガラス繊
維強化ポリプロピレン樹脂シートをリールなどに巻き取
るか、カッターにより所定の幅・長さに裁断して実用に
供する。(3) Production of Glass Fiber Reinforced Thermoplastic Resin Sheet An example of the production of the glass fiber reinforced polypropylene resin sheet by the wet papermaking method will be specifically described below. Glass fiber reinforced polypropylene resin sheet produced by wet papermaking
In a dispersion tank, a chopped strand of glass fiber having a length of 3 to 50 mm and a polypropylene resin powder having an average particle diameter of 0.1 to 1 mm were added in advance with a surfactant and agitated to sufficiently foam. Pour into liquid. In the dispersion tank, stirring for uniformly dispersing the reinforcing glass fiber and the polypropylene resin powder particles is performed. By this stirring, the chopped strands are opened and both are dispersed. Next, the sufficiently stirred dispersion liquid is supplied by a pump into the head box installed above the mesh conveyor belt. A wet box is installed below the mesh conveyor belt on the lower side of the head box, and the pressure in the wet box is maintained at a negative pressure, so that the dispersion liquid in the head box is transferred to the mesh conveyor belt. By suction-dewatering through the mixture, a mixed paper (web) in which glass fibers and polypropylene resin powder are uniformly dispersed is obtained on a mesh-shaped conveyor belt. This mixed paper (web) is dried in a hot-air drying oven, and the dried mixed paper (web) is heated and melted at a temperature not lower than the melting point of the polypropylene resin as a matrix by using a double belt press, and then pressurized and cooled. Thus, a glass fiber reinforced polypropylene resin sheet having glass fibers fixed by a polypropylene resin is obtained. At this time, by controlling the applied pressure, a non-porous sheet or a porous breathable sheet containing almost no voids is obtained. These glass fiber reinforced polypropylene resin sheets are wound up on a reel or the like, or cut into a predetermined width and length by a cutter for practical use.
【００１２】[II] 繊維強化ポリプロピレン樹脂シート 本発明の繊維強化ポリプロピレン樹脂シートの製造方法
によって製造されたガラス繊維強化熱可塑性樹脂シート
は、シート中のガラス繊維含有量を増加させて、４０〜
７５重量％程度の高ガラス繊維含量としても、強度や剛
性の向上度合の低下が小さく、また、８０〜１２０℃程
度の高温度下での強度、剛性の低下が少ないガラス繊維
強化ポリプロピレン樹脂シートとすることができる。従
って、得られる繊維強化ポリプロピレン樹脂シートは、
強度、剛性が極めて優れているので、バンパービーム、
フロントエンドパネル、インストルメントパネル、ドア
トリムなどの自動車部品や、家電製品のハウジング、或
いは、パネル状土木建築材料などとして極めて有用な材
料である。[II] Fiber Reinforced Polypropylene Resin Sheet The glass fiber reinforced thermoplastic resin sheet produced by the method for producing a fiber reinforced polypropylene resin sheet of the present invention has a glass fiber content of 40 to 40% by increasing the glass fiber content in the sheet.
A glass fiber reinforced polypropylene resin sheet with a small decrease in the degree of improvement in strength and rigidity and a small decrease in strength and rigidity even at a high temperature of about 80 to 120 ° C. even with a high glass fiber content of about 75% by weight. can do. Therefore, the obtained fiber-reinforced polypropylene resin sheet,
As the strength and rigidity are extremely excellent, the bumper beam,
It is an extremely useful material for automobile parts such as front-end panels, instrument panels, door trims, housings for home electric appliances, and panel-shaped civil engineering building materials.
【００１３】[0013]
【実施例】本発明の繊維強化ポリプロピレン樹脂シート
の製造方法をより一層具体的に説明するため、以下に実
施例及び比較例を示すが、本発明はこれら実験例の方法
に限定されるものではない。 実施例１〜４ ＪＩＳ−Ｋ７２１０（条件１４）によって測定したＭＦ
Ｒが、１０７ｇ／１０分（実施例１）、１７０ｇ／１０
分（実施例２）、２７０ｇ／１０分（実施例３）、５０
０ｇ／１０分（実施例４）の４種類のポリプロピレンホ
モポリマーのペレット（三菱油化（株）製試作品）を、
機械的に粉砕して得た平均粒径が約３５０μｍの粉体６
０重量％と、ガラスチョップドストランド（日本電気硝
子社製、ＥＣＳ−１３−ＩＰ−１６９Ｇ）４０重量％と
を用い、湿式抄造法に従い、これらを水中にて混合・分
散させた後、脱水混抄し乾燥して得た不織布状のウェブ
を２１０℃の温度及び２５ｋｇｆ／ｃｍ２の圧力で熱プ
レスして、３１ｃｍ×３４ｃｍ、厚さ３．８ｍｍのシー
トを得た。このシートから試験片を切り出し、ＪＩＳ−
Ｋ７２０３による曲げ強度及び曲げ弾性率を２３℃及び
９０℃で測定した結果、及び、ＪＩＳ−Ｋ７１１０によ
るアイゾット衝撃強度を２３℃で測定した結果を表１に
示す。また、同シートから１０ｃｍ×１０ｃｍの試験片
を作成し、遠赤外線ヒーターで２２０℃に予熱してか
ら、油圧プレス機と雌雄型を用いて２００ｋｇｆ／ｃｍ
２の圧力でプレス成形して得られた１５ｃｍ×１５ｃｍ
の平板の四角から３ｃｍ角の試験片４枚を切り出し、灰
化法によりガラス繊維含有量を測定した結果を表１に示
す。EXAMPLES In order to more specifically describe the method for producing the fiber-reinforced polypropylene resin sheet of the present invention, examples and comparative examples will be shown below, but the present invention is not limited to the methods of these experimental examples. Absent. Examples 1 to 4 MF measured by JIS-K7210 (condition 14)
R is 107 g / 10 minutes (Example 1), 170 g / 10
Min (Example 2), 270 g / 10 min (Example 3), 50
0 g / 10 min (Example 4) of four types of polypropylene homopolymer pellets (prototype manufactured by Mitsubishi Petrochemical Co., Ltd.)
Powder 6 with an average particle size of about 350 μm obtained by mechanical crushing
Using 0% by weight and 40% by weight of glass chopped strand (manufactured by Nippon Electric Glass Co., Ltd., ECS-13-IP-169G), these were mixed and dispersed in water according to a wet papermaking method, and then dehydrated and mixed. The non-woven web obtained by drying was hot pressed at a temperature of 210 ° C. and a pressure of 25 kgf / cm 2 to obtain a sheet having a size of 31 cm × 34 cm and a thickness of 3.8 mm. A test piece is cut out from this sheet and JIS-
Table 1 shows the results of measuring the bending strength and the bending elastic modulus according to K7203 at 23 ° C. and 90 ° C., and the results of measuring the Izod impact strength according to JIS-K7110 at 23 ° C. Further, a test piece of 10 cm × 10 cm was prepared from the sheet, preheated to 220 ° C. with a far infrared heater, and then 200 kgf / cm using a hydraulic press machine and male and female dies.
15 cm x 15 cm obtained by press molding at a pressure of 2
Table 1 shows the results of measuring the glass fiber content by cutting out four 3 cm square test pieces from the square of the plate.
【００１４】実施例５〜７ ガラスチョップドストランドの含量を、５０重量％（実
施例５）、６０重量％（実施例６）、７０重量％（実施
例７）とした以外は実施例２と全く同様の方法でシート
と試験片を作成し、同様の測定をした。その結果を表１
に示す。 比較例１〜４ ＭＦＲが５ｇ／１０分（三菱油化（株）製、グレイド
名：ＭＡ４、比較例１），３０ｇ／１０分（三菱油化
（株）製試作品、比較例２）、７０ｇ／１０分（三菱油
化（株）製試作品、比較例３）及び８００ｇ／１０分
（三菱油化（株）製試作品、比較例４）の４種類のポリ
プロピレンホモポリマーを用いる以外は実施例１〜４と
全く同様の方法でシートと試験片を作成し、同様の測定
をした。その結果を表１に示す。Examples 5 to 7 Except that the content of the glass chopped strands was 50% by weight (Example 5), 60% by weight (Example 6), and 70% by weight (Example 7), completely different from Example 2. A sheet and a test piece were prepared by the same method, and the same measurement was performed. The results are shown in Table 1.
Shown in. Comparative Examples 1 to 4 MFR is 5 g / 10 minutes (Mitsubishi Yuka Co., Ltd., grade name: MA4, Comparative Example 1), 30 g / 10 minutes (Mitsubishi Yuka Co., Ltd. prototype, Comparative Example 2), 70 g / 10 min (Mitsubishi Yuka Co., Ltd. prototype, Comparative Example 3) and 800 g / 10 min (Mitsubishi Yuka Co., Ltd. prototype, Comparative Example 4) except for using four types of polypropylene homopolymers. A sheet and a test piece were prepared by the same method as in Examples 1 to 4, and the same measurement was performed. The results are shown in Table 1.
【００１５】比較例５〜６ ＭＦＲが３０ｇ／１０分のポリプロピレンホモポリマー
（三菱油化（株）製試作品）に対してガラスチョップド
ストランド５０重量％（比較例５）及び６０重量％（比
較例６）を加える以外は実施例１〜４と全く同様の方法
でシートと試験片を作成し、同様の測定をした。その結
果を表１に示す。Comparative Examples 5 to 6 50% by weight of glass chopped strands (Comparative Example 5) and 60% by weight (Comparative Example) with respect to polypropylene homopolymer having a MFR of 30 g / 10 min (prototype manufactured by Mitsubishi Petrochemical Co., Ltd.) A sheet and a test piece were prepared by the same method as in Examples 1 to 4 except that 6) was added, and the same measurement was performed. The results are shown in Table 1.
【００１６】比較例７〜１２ 上記実施例及び比較例で用いたＭＦＲが３０ｇ／１０
分、７０ｇ／１０分、１０７ｇ／１０分、１７０ｇ／１
０分、２７０ｇ／１０分及び５００ｇ／１０分のポリプ
ロピレンホモポリマーペレットを用い、ガラス繊維を加
えずに２１０℃の温度で２５ｋｇｆ／ｃｍ2 の圧力で熱
プレスして成形した３１ｃｍ×３４ｃｍ、厚さ３．８ｍ
ｍの平板から試験片を切り出し、曲げ強度、曲げ弾性率
及びアイゾット衝撃強度を測定した。その結果を表１に
示す。Comparative Examples 7 to 12 MFR used in the above Examples and Comparative Examples was 30 g / 10.
Min, 70g / 10min, 107g / 10min, 170g / 1
Using polypropylene homopolymer pellets of 0 minutes, 270 g / 10 minutes and 500 g / 10 minutes, heat-pressed at a temperature of 210 ° C. and a pressure of 25 kgf / cm 2 without adding glass fibers to form 31 cm × 34 cm, thickness. 3.8m
A test piece was cut out from a flat plate of m and the bending strength, the bending elastic modulus and the Izod impact strength were measured. The results are shown in Table 1.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【発明の効果】このような本発明の繊維強化ポリプロピ
レン樹脂シートの製造方法は、成分（Ａ）：メルトフロ
ーレート（ＭＦＲ）１００〜６００ｇ／１０分の粉粒体
状のポリプロピレン樹脂２５〜９０重量％と、成分
（Ｂ）：長さ３〜５０ｍｍのガラス繊維７５〜１０重量
％とを湿式抄造法に従い、混合・分散させた後、脱水混
抄し乾燥させてウエブを得、このウエブを加熱、加圧、
冷却して、繊維強化ポリプロピレン樹脂シートを製造す
ることにより、常温はもちろん、高温度における強度、
剛性が優れ、また、ガラス繊維の含有量を高くしても郷
土、剛性の低下が少ないため、特に高温度での使用によ
る高強度、高剛性が要求される工業部品用材料として好
適である。The method for producing a fiber-reinforced polypropylene resin sheet according to the present invention is as follows: Component (A): Melt flow rate (MFR) 100 to 600 g / 10 min. %, And component (B): 75 to 10% by weight of glass fibers having a length of 3 to 50 mm are mixed and dispersed according to a wet papermaking method, then dehydrated and mixed and dried to obtain a web, which is heated, Pressurization,
By cooling and manufacturing a fiber reinforced polypropylene resin sheet, strength at high temperature as well as at room temperature,
It is excellent in rigidity, and even if the content of glass fiber is increased, there is little decrease in the locality and the rigidity. Therefore, it is suitable as a material for industrial parts which requires high strength and high rigidity especially when used at high temperature.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２９Ｋ 23:00 105:06 Ｃ０８Ｌ 23:12 (56)参考文献 特開 平１−318045（ＪＰ，Ａ) 特開 平２−51536（ＪＰ，Ａ) 特開 平１−92231（ＪＰ，Ａ)─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location // B29K 23:00 105: 06 C08L 23:12 (56) References Japanese Patent Laid-Open No. 1-318045 ( JP, A) JP-A-2-51536 (JP, A) JP-A-1-92231 (JP, A)
Claims (1)
０重量％と、成分（Ｂ）：長さ３〜５０ｍｍのガラス繊
維７５〜１０重量％とを湿式抄造法に従い、水中にて混
合・分散させた後、脱水混抄し乾燥させてウエブを得、
このウエブを加熱、加圧、冷却して、繊維強化ポリプロ
ピレン樹脂シートを製造する方法において、前記成分
（Ａ）がメルトフローレート（ＭＦＲ）１００〜６００
ｇ／１０分の粉粒体状のポリプロピレン樹脂であること
を特徴とする繊維強化ポリプロピレン樹脂シートの製造
方法。1. Component (A): polypropylene resin 25-9
0% by weight and component (B): 75 to 10% by weight of glass fibers having a length of 3 to 50 mm are mixed and dispersed in water according to a wet papermaking method, then dehydrated and mixed and dried to obtain a web.
In the method for producing a fiber-reinforced polypropylene resin sheet by heating, pressurizing and cooling this web, the component (A) has a melt flow rate (MFR) of 100 to 600.
A method for producing a fiber-reinforced polypropylene resin sheet, which is a polypropylene resin in the form of powder / granule for g / 10 minutes.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4068325A JPH0798868B2 (en) | 1992-03-26 | 1992-03-26 | Method for producing fiber-reinforced polypropylene resin sheet |
| DE1992628662 DE69228662T2 (en) | 1991-12-10 | 1992-12-10 | Process for the production of fiber-reinforced plastic sheets made of polypropylene |
| EP19920121088 EP0548696B1 (en) | 1991-12-10 | 1992-12-10 | Process for the production of fiber-reinforced polypropylene resin sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4068325A JPH0798868B2 (en) | 1992-03-26 | 1992-03-26 | Method for producing fiber-reinforced polypropylene resin sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05271433A JPH05271433A (en) | 1993-10-19 |
| JPH0798868B2 true JPH0798868B2 (en) | 1995-10-25 |
Family
ID=13370564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4068325A Expired - Lifetime JPH0798868B2 (en) | 1991-12-10 | 1992-03-26 | Method for producing fiber-reinforced polypropylene resin sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0798868B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3879000A1 (en) | 2015-03-10 | 2021-09-15 | Bobst Manchester Limited | Coated web, vacuum coater and methods |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69426017T2 (en) * | 1993-12-20 | 2001-05-17 | Nippon Catalytic Chem Ind | Process for the preparation of aryl esters |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3724155A1 (en) * | 1987-07-21 | 1989-02-02 | Lentia Gmbh | COMPOSITE MADE OF POLYPROPYLENE REINFORCED WITH FIBER MATS |
| JPH01318045A (en) * | 1988-05-10 | 1989-12-22 | E I Du Pont De Nemours & Co | Composite material composed of wet molding mixture of glass fiber and thermoplastic fiber |
| JPH0251536A (en) * | 1988-08-16 | 1990-02-21 | Asahi Chem Ind Co Ltd | Fiber-reinforced thermoplastic resin sheet |
-
1992
- 1992-03-26 JP JP4068325A patent/JPH0798868B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3879000A1 (en) | 2015-03-10 | 2021-09-15 | Bobst Manchester Limited | Coated web, vacuum coater and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05271433A (en) | 1993-10-19 |
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