JPH08109295A - Molded article - Google Patents
Molded articleInfo
- Publication number
- JPH08109295A JPH08109295A JP24813394A JP24813394A JPH08109295A JP H08109295 A JPH08109295 A JP H08109295A JP 24813394 A JP24813394 A JP 24813394A JP 24813394 A JP24813394 A JP 24813394A JP H08109295 A JPH08109295 A JP H08109295A
- Authority
- JP
- Japan
- Prior art keywords
- propylene
- molding
- weight
- molded product
- composition
- 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
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、圧縮成形などによる成
形品に関する。更に詳しくは、成形時における金型内で
の流動性が良好な組成物による、剛性、耐衝撃性等の機
械的特性に優れ、なかでも表皮貼り成形において外観の
非常に良好な成形品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded product obtained by compression molding or the like. More specifically, the present invention relates to a molded product having excellent mechanical properties such as rigidity and impact resistance, which is obtained by a composition having good fluidity in a mold at the time of molding, and particularly has a very good appearance in skin-sticking molding.
【０００２】[0002]
【従来の技術】現在、ポリプロピレン樹脂は種々の機械
的特性に優れているのみならず、成形加工性も比較的良
好であるため、射出成形、圧縮成形を中心とする各種成
形法による成形品が、自動車分野、建材分野、家電分野
に広く採用されている。従来、自動車等の内装における
積層成形品は、ポリプロピレンの射出成形による基材や
木質系材料の圧縮成形による基材を成形した後、該基材
に接着剤を用いて表皮材を真空成形によって貼り合わせ
る方法により得られるものが主流である。しかしながら
この方法では、接着剤を使用することから作業環境が悪
化する問題や、成形工程が複雑となる欠点を有する。こ
れらの点を改良した成形法として、近年、表皮材を金型
内に設置し、基材としての樹脂を溶融供給後、圧縮成形
する方法が採用されつつある。しかしながらこの方法に
おいては、樹脂のチャージマークが表皮材表面に転写さ
れることや、供給される樹脂の熱や圧力により表皮材の
クッション層がダメージを受ける等の不具合が発生す
る。また加圧賦形する際には、冷却された金型の全面に
樹脂を均一に押し拡げなければならないため、高い温度
と大きな圧力が必要とされる。それらの点を解決するた
めには、基材として使用する樹脂の流動性を向上させる
ことが有効な手段ではあるが、流動性すなわちメルトフ
ローレート（以下ＭＦＲと略す）を向上させると、成形
品の機械的特性、特に耐衝撃性を大きく低下させること
となり、製品外観と機械的特性とを両立させた成形品を
得ることは非常に困難となっている。2. Description of the Related Art At present, polypropylene resins are not only excellent in various mechanical properties but also relatively good in moldability, so that molded products by various molding methods such as injection molding and compression molding are available. Widely used in the automotive field, building materials field, and home appliances field. BACKGROUND ART Conventionally, for a laminated molded article in the interior of an automobile or the like, after molding a base material by injection molding of polypropylene or a base material by compression molding of a wood-based material, a skin material is attached to the base material by vacuum molding using an adhesive. What is obtained by the method of combining is the mainstream. However, this method has a problem that the working environment is deteriorated due to the use of the adhesive and the molding process is complicated. As a molding method in which these points are improved, in recent years, a method in which a skin material is placed in a mold, a resin as a base material is melted and supplied, and then compression molding is being adopted. However, in this method, problems occur such that charge marks of the resin are transferred to the surface of the skin material, and the cushion layer of the skin material is damaged by the heat and pressure of the supplied resin. Further, when pressure shaping is performed, the resin has to be uniformly spread over the entire surface of the cooled mold, so that high temperature and large pressure are required. In order to solve these problems, it is an effective means to improve the fluidity of the resin used as the base material, but if the fluidity, that is, the melt flow rate (hereinafter abbreviated as MFR) is improved, the molded article is improved. The mechanical properties, especially the impact resistance, are greatly deteriorated, and it is very difficult to obtain a molded product having both the product appearance and the mechanical properties.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記の事情
に鑑みてなされたものであり、圧縮成形などの成形に好
適な易成形性を有する組成物による、機械的特性に優れ
た成形品に関し、なかでも製品外観の良好な表皮貼り成
形品に関する。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is a molded article having excellent mechanical properties, which is obtained from a composition having easy moldability suitable for molding such as compression molding. In particular, the present invention relates to a skin-attached molded product having a good product appearance.
【０００４】[0004]
【課題を解決するための手段】本発明者らは上記課題を
解決するために検討を重ねた結果、その目的に好適な充
填剤入りプロピレン系樹脂組成物を見出し、それを用い
た、製品外観及び機械的特性に優れた成形品または表皮
貼り成形品を得るに至ったものである。すなわち、本発
明に従えば、上記課題は、（Ａ）プロピレン−エチレン
ランダム共重合体を７〜４３重量％含むプロピレン系樹
脂７０〜９５重量％、及び（Ｂ）充填材３０〜５重量％
からなり、温度２３０℃、荷重２．１６ｋｇにおけるメ
ルトフローレートが３０〜８０ｇ／１０分である組成物
を用いた成形品により解決することができる。Means for Solving the Problems As a result of repeated studies to solve the above problems, the present inventors have found a propylene-based resin composition containing a filler suitable for the purpose, and using it, the product appearance And a molded product or a skin-bonded molded product having excellent mechanical properties. That is, according to the present invention, the above-mentioned problems are (A) 70 to 95% by weight of a propylene-based resin containing 7 to 43% by weight of a propylene-ethylene random copolymer, and (B) 30 to 5% by weight of a filler.
And the melt flow rate at a temperature of 230 ° C. and a load of 2.16 kg is 30 to 80 g / 10 minutes.
【０００５】以下本発明を具体的に説明する。 （Ａ）プロピレン−エチレンランダム共重合体を７〜４
３重量％含むプロピレン系樹脂 本発明において用いられるプロピレン−エチレンランダ
ム共重合体を７〜４３重量％含むプロピレン系樹脂と
は、プロピレン−エチレンランダム共重合体７〜４３重
量％と他のプロピレン系重合体９３〜５７重量％とを組
み合わせたものであり、プロピレン−エチレンランダム
共重合体は混合物または共重合物として該プロピレン系
樹脂中に含まれる。用いられるプロピレン−エチレンラ
ンダム共重合体のエチレン含量は１〜１０重量％のもの
が好ましい。１重量％未満では易流動性及び耐衝撃性の
改良に効果が見られず、１０重量％を超えると剛性と耐
熱性が低下する。該プロピレン系樹脂中に含まれるプロ
ピレン−エチレンランダム共重合体の量は７〜４３重量
％、好ましくは１４〜３７重量％、さらに好ましくは２
１〜３２重量％である。７重量％未満では成形品の伸び
が不充分であり、溶融樹脂の流動性が劣るとともに成形
品の耐衝撃性が悪くなる。一方、４３重量％を超えると
成形品の剛性が低下し、耐熱性も悪くなる。他のプロピ
レン系重合体とは、プロピレン単独重合体、プロピレン
−エチレンブロック共重合体、プロピレン−α−オレフ
ィン共重合体等をいう。また、プロピレン−エチレンラ
ンダム共重合体を７〜４３重量％含むプロピレン系樹脂
には、他の樹脂やエラストマー例えば、ポリエチレン、
エチレン−α−オレフィン共重合体エラストマー、スチ
レン−ブタジエン共重合体エラストマーまたはその誘導
体等を混合することができ、その際必要に応じ、各種相
溶化剤の使用も可能である。Hereinafter, the present invention will be described specifically. (A) Propylene-ethylene random copolymer 7 to 4
Propylene-based resin containing 3% by weight Propylene-based resin containing 7 to 43% by weight of propylene-ethylene random copolymer used in the present invention means 7-43% by weight of propylene-ethylene random copolymer and other propylene-based resin. The propylene-ethylene random copolymer is contained as a mixture or a copolymer in the propylene-based resin. The ethylene content of the propylene-ethylene random copolymer used is preferably 1 to 10% by weight. If it is less than 1% by weight, the effect of improving free-flowability and impact resistance is not seen, and if it exceeds 10% by weight, rigidity and heat resistance are deteriorated. The amount of the propylene-ethylene random copolymer contained in the propylene resin is 7 to 43% by weight, preferably 14 to 37% by weight, more preferably 2%.
It is 1 to 32% by weight. If it is less than 7% by weight, the elongation of the molded product is insufficient, the fluidity of the molten resin is poor, and the impact resistance of the molded product is poor. On the other hand, when it exceeds 43% by weight, the rigidity of the molded product is lowered and the heat resistance is also deteriorated. Other propylene-based polymers refer to propylene homopolymers, propylene-ethylene block copolymers, propylene-α-olefin copolymers and the like. Further, the propylene-based resin containing 7 to 43% by weight of the propylene-ethylene random copolymer includes other resins and elastomers such as polyethylene,
An ethylene-α-olefin copolymer elastomer, a styrene-butadiene copolymer elastomer, a derivative thereof, or the like can be mixed, and various compatibilizers can be used, if necessary.
【０００６】（Ｂ）充填材 本発明において充填材とは、有機または無機の粉状、繊
維状等の固体をいい、例えば、シリカ、マイカ、タル
ク、石粉、クレー、グラファイト、カーボンブラック、
炭酸カルシウム、酸化チタン、アルミナ、水酸化アルミ
ニウム、ワラストナイト、アルミニウム、フェライト、
二硫化モリブデン、木粉、カーボン繊維、アラミド繊
維、アルミナ繊維、チタン酸カリウムウイスカ、ガラス
繊維、合成繊維、天然繊維、金属繊維等が挙げられ、中
でも好ましくは平均粒子径が２０μｍ以下である固体、
さらに好ましくは平均粒子径が２０μｍ以下であるタル
クが成形性及び成形品の機械的特性が良好となることか
ら好ましい。(B) Filler In the present invention, the filler means an organic or inorganic solid in the form of powder or fiber, such as silica, mica, talc, stone powder, clay, graphite, carbon black,
Calcium carbonate, titanium oxide, alumina, aluminum hydroxide, wollastonite, aluminum, ferrite,
Examples thereof include molybdenum disulfide, wood powder, carbon fiber, aramid fiber, alumina fiber, potassium titanate whiskers, glass fiber, synthetic fiber, natural fiber, and metal fiber. Among them, solids having an average particle diameter of 20 μm or less are preferable.
It is more preferable to use talc having an average particle diameter of 20 μm or less because the moldability and the mechanical properties of the molded product will be good.
【０００７】（Ｃ）組成割合 本発明の組成物において、全組成物中に占める、プロピ
レン−エチレンランダム共重合体を７〜４３重量％含む
プロピレン系樹脂の組成割合は、７０〜９５重量％であ
り、８０〜９３重量％が好ましく、特に８５〜９０重量
％が好適である。該プロピレン系樹脂の組成割合が、９
５重量％を超える場合は、得られる成形品の剛性が低下
し、また耐熱性も良くない。一方、７０重量％未満で
は、得られる組成物の伸びが不充分であり、成形性が劣
るとともに成形品の耐衝撃性が悪くなり、表皮端末をタ
ッカー止めする場合に破損が起こり易い。タッカーとは
折り返した表皮の端末をホチキスと同様の針で止めるた
めの工具である。本発明の組成物において、全組成物中
に占める充填材の組成割合は、３０〜５重量％であり、
２０〜７重量％が好ましく、特に１５〜１０重量％が好
適である。全組成物中に占める充填材の組成割合が、５
重量％未満では、得られる成形品の剛性が低い。一方、
３０重量％を超えると、剛性は向上するが、成形性が悪
くなるとともに組成物の密度が高くなり、成形品重量が
重くなってしまう。(C) Composition Ratio In the composition of the present invention, the composition ratio of the propylene resin containing 7 to 43% by weight of the propylene-ethylene random copolymer in the total composition is 70 to 95% by weight. 80 to 93% by weight is preferable, and 85 to 90% by weight is particularly preferable. The composition ratio of the propylene resin is 9
When it exceeds 5% by weight, the rigidity of the obtained molded article decreases and the heat resistance is also poor. On the other hand, if it is less than 70% by weight, the elongation of the obtained composition is insufficient, the moldability is deteriorated and the impact resistance of the molded product is deteriorated, and the damage is likely to occur when the skin terminal is tackered. A tucker is a tool for stopping the folded back end of the epidermis with a needle similar to a stapler. In the composition of the present invention, the composition ratio of the filler in the entire composition is 30 to 5% by weight,
20 to 7% by weight is preferable, and 15 to 10% by weight is particularly preferable. The composition ratio of the filler in the whole composition is 5
If it is less than wt%, the rigidity of the obtained molded article is low. on the other hand,
If it exceeds 30% by weight, the rigidity is improved, but the moldability is deteriorated, the density of the composition is increased, and the weight of the molded product is increased.
【０００８】（Ｄ）組成物のＭＦＲ 本発明における組成物の温度２３０℃、荷重２．１６ｋ
ｇにおけるＭＦＲは、３０〜８０ｇ／１０分であり、中
でも３５〜７０ｇ／１０分が好ましく、とりわけ４０〜
６０ｇ／１０分のものが好適である。ＭＦＲが３０ｇ／
１０分未満の場合、樹脂の流動長さが小さくなり成形品
厚みが厚くなってしまうだけでなく、樹脂を圧縮流動さ
せるために高い温度と大きな圧力を要することから、表
皮材に与えるダメージが大きくなり、好ましくない。逆
に８０ｇ／１０分を超える場合は、得られる製品の耐衝
撃性が著しく劣り、機械的特性を満足しない。(D) Composition MFR The composition of the present invention has a temperature of 230 ° C. and a load of 2.16 k.
The MFR in g is 30 to 80 g / 10 minutes, preferably 35 to 70 g / 10 minutes, and particularly 40 to
It is preferably 60 g / 10 minutes. MFR is 30g /
If it is less than 10 minutes, not only the flow length of the resin becomes small and the thickness of the molded product becomes thick, but also high temperature and large pressure are required to compress and flow the resin, so that the damage to the skin material is large. It is not preferable. On the other hand, when it exceeds 80 g / 10 minutes, the impact resistance of the obtained product is remarkably poor and the mechanical properties are not satisfied.
【０００９】（Ｅ）組成物の製造 該組成物を得るにはタンブラー、ブレンダー、ヘンシェ
ルミキサーのような混合機を使ってドライブレンドした
り、またバンバリーミキサー等のバッチ式混練機や押出
機のような連続式混練機を用いて溶融混練することがで
きる。またこれらの方法を併用することも可能である。
また充填材等は所望の組成割合よりも大きいものを予め
樹脂と混練しておき、マスターバッチとして使用するこ
ともできる。また、必要に応じて、一般に使われている
安定剤、難燃化剤、加工性改良剤、滑剤、帯電防止剤、
酸化防止剤、紫外線吸収剤、着色剤、顔料、発泡剤のご
とき添加剤を添加してもよいことはもちろんのことであ
る。(E) Production of Composition To obtain the composition, dry blending is carried out using a mixer such as a tumbler, blender or Henschel mixer, or a batch type kneader such as a Banbury mixer or an extruder is used. Can be melt-kneaded using a continuous kneader. It is also possible to use these methods together.
Further, a filler or the like having a composition ratio higher than a desired composition may be kneaded with the resin in advance and used as a masterbatch. In addition, if necessary, commonly used stabilizers, flame retardants, processability improvers, lubricants, antistatic agents,
It goes without saying that additives such as antioxidants, ultraviolet absorbers, colorants, pigments and foaming agents may be added.
【００１０】（Ｆ）表皮材 本発明において表皮材とは上記組成物の表面に貼り合わ
せて成形品とする材料であり、表皮層のみからなるも
の、表皮層とクッション層とからなるものを含む。表皮
層としては、ポリ塩化ビニル、ポリエステル、ポリオレ
フィン、ポリオレフィン系熱可塑性エラストマー等のシ
ート、フィルム、ネット、レザー、または織布、不織布
等が挙げられる。クッション層としては、ポリウレタン
発泡体、ポリ塩化ビニル発泡体、ポリオレフィン発泡
体、ポリオレフィン系熱可塑性エラストマー発泡体等が
挙げられる。これらの表皮材の表面には凹凸のしぼ模様
を設けたものでもよい。(F) Skin material In the present invention, the skin material is a material which is bonded to the surface of the above composition to form a molded article, and includes a material having only a skin layer and a material having a skin layer and a cushion layer. . Examples of the skin layer include sheets, films, nets, leathers, woven fabrics, and non-woven fabrics of polyvinyl chloride, polyester, polyolefin, thermoplastic polyolefin-based elastomer, and the like. Examples of the cushion layer include polyurethane foam, polyvinyl chloride foam, polyolefin foam, and polyolefin-based thermoplastic elastomer foam. The surface of these skin materials may be provided with an uneven grain pattern.
【００１１】（Ｇ）成形品または表皮貼り成形品の成形 本発明における成形品は、上記組成物を用いて各種成形
法によって得られ、表皮貼り成形品は上記組成物と表皮
材の組合せによって得ることができる。成形方法として
は、好ましくは圧縮成形、さらに好ましくは射出圧縮成
形またはホットフロースタンピング成形によって成形す
るのが好適である。これらの成形法においては、必要に
応じて表皮材を金型内に設置し、溶融した樹脂を、金型
内に供給し、型締めを行い、その際の加圧力により賦形
し、所望の成形品を製造することができる。射出圧縮成
形の場合は、金型を開いた状態で、溶融した樹脂を金型
内のホットランナーを通して金型内に射出供給し加圧賦
形する。ホットフロースタンピング成形では、溶融した
樹脂をダイスよりシート状、ロッド状等の形で、金型上
に走査させながら供給し、加圧賦形する。本発明の組成
物のＭＦＲは比較的大きいので、金型内に溶融樹脂を供
給する際に樹脂の流動性が良好であり、樹脂が金型内に
拡がりやすく、表皮材を用いた場合表皮材にダメージを
与えることなく、外観が非常に良好な成形品を製造する
ことができる。また、本発明の組成物は、易成形性、及
び機械的特性を生かし、別の成形法である射出成形や低
圧射出成形にも応用することができる。(G) Molding of molded article or skin-attached molded article The molded article of the present invention is obtained by various molding methods using the above composition, and the skin-attached molded article is obtained by a combination of the above composition and a skin material. be able to. The molding method is preferably compression molding, more preferably injection compression molding or hot flow stamping molding. In these molding methods, if necessary, a skin material is placed in a mold, the molten resin is supplied into the mold, the mold is clamped, and the desired pressure is applied to shape the resin. Molded articles can be manufactured. In the case of injection compression molding, in a state where the mold is opened, the molten resin is injected and supplied into the mold through a hot runner in the mold to perform pressure shaping. In hot flow stamping molding, the molten resin is supplied from a die in a sheet shape, a rod shape, or the like while being scanned onto a mold, and pressure molding is performed. Since the MFR of the composition of the present invention is relatively large, the fluidity of the resin is good when the molten resin is supplied into the mold, the resin easily spreads in the mold, and when the skin material is used, the skin material It is possible to manufacture a molded product having a very good appearance without damaging the resin. Further, the composition of the present invention can be applied to other molding methods such as injection molding and low-pressure injection molding by making the best use of moldability and mechanical properties.
【００１２】（Ｈ）成形品または表皮貼り成形品 本発明による成形品は上述の記載に従って得られる。該
成形品の形状は目的に応じて適宜設定することができ、
特に、そり、変形、ひけ等の小さなことと成形性の良好
なことから大型の成形品に好ましく適用される。本発明
の成形品の厚みは適宜設定可能であり、目的に応じた厚
みに設定することができる。本発明の成形品には樹脂の
チャージマークや表皮材のダメージ等が無く外観が非常
に優れている。また、該成形品は剛性及び耐衝撃強度が
高く、機械的特性のバランスが優れている。(H) Molded product or skin-covered molded product The molded product according to the present invention is obtained according to the above description. The shape of the molded product can be appropriately set according to the purpose,
In particular, it is preferably applied to a large-sized molded product because of its small warpage, deformation, sink mark and the like and good moldability. The thickness of the molded article of the present invention can be appropriately set, and can be set to a thickness according to the purpose. The molded article of the present invention has a very good appearance without charge marks of the resin or damage to the skin material. Further, the molded product has high rigidity and high impact strength, and has an excellent balance of mechanical properties.
【００１３】[0013]
【作用】本発明の組成物は、特定のＭＦＲを有し、特定
量のプロピレン−エチレンランダム共重合体及び充填材
を含むことから、溶融樹脂供給時の流動性が良好となる
とともに、組成物の伸びが大きくなり、成形品の耐衝撃
性を著しく改善できるとともに優れた剛性を有すると推
定され、成形性と機械的特性とのバランスが良好とな
る。The composition of the present invention has a specific MFR and contains a specific amount of a propylene-ethylene random copolymer and a filler, so that the fluidity at the time of supplying the molten resin is good and the composition is It is presumed that the elongation becomes large, the impact resistance of the molded product can be remarkably improved and the rigidity is excellent, and the balance between the moldability and the mechanical properties becomes good.
【００１４】[0014]
【実施例】以下、実施例によって本発明をさらに詳しく
説明する。実施例及び比較例において使用したものを以
下に示す。 （Ａ）プロピレン系樹脂 （Ａ−１）温度２３０℃、荷重２．１６ｋｇにおけるＭ
ＦＲ（ＪＩＳ Ｋ６７５８に従って測定。以下同じ）が
８０ｇ／１０分であるプロピレン単独重合体。 （Ａ−２）プロピレン含量が５３重量％であるエチレン
−プロピレン共重合物２０重量％と、プロピレン８０重
量％とのブロック共重合体であり、温度２３０℃、荷重
２．１６ｋｇにおけるＭＦＲが５０ｇ／１０分であるプ
ロピレン系共重合体。 （Ａ−３）プロピレン含量が５５重量％であるエチレン
−プロピレン共重合物１５重量％と、プロピレン８５重
量％とのブロック共重合体であり、温度２３０℃、荷重
２．１６ｋｇにおけるＭＦＲが７０ｇ／１０分であるプ
ロピレン系共重合体。 （Ａ−４）プロピレン含量が５０重量％であるエチレン
−プロピレン共重合物１５重量％と、プロピレン８５重
量％とのブロック共重合体であり、温度２３０℃、荷重
２．１６ｋｇにおけるＭＦＲが２０ｇ／１０分であるプ
ロピレン系共重合体。 （Ａ−５）エチレンの共重合割合が３重量％であり、温
度２３０℃、荷重２．１６ｋｇにおけるＭＦＲが３０ｇ
／１０分であるプロピレン−エチレンランダム共重合
体。 （Ａ−６）エチレンの共重合割合が５重量％であり、温
度２３０℃、荷重２．１６ｋｇにおけるＭＦＲが５０ｇ
／１０分であるプロピレン−エチレンランダム共重合
体。 （Ａ−７）プロピレン含量が４０重量％であり、温度２
３０℃、荷重２．１６ｋｇにおけるＭＦＲが１．０ｇ／
１０分であるエチレン−プロピレン共重合体エラストマ
ー。 （Ａ−８）温度１９０℃、荷重２．１６ｋｇにおけるＭ
ＦＲ（ＪＩＳ Ｋ６７６０に従って測定）が２．０ｇ／
１０分であり、密度が０．９５３ｇ／ｃｍ3 である高密
度ポリエチレン。The present invention will be described in more detail with reference to the following examples. Those used in Examples and Comparative Examples are shown below. (A) Propylene resin (A-1) M at a temperature of 230 ° C. and a load of 2.16 kg
Propylene homopolymer having an FR (measured according to JIS K6758; the same applies hereinafter) of 80 g / 10 minutes. (A-2) A block copolymer of 20% by weight of an ethylene-propylene copolymer having a propylene content of 53% by weight and 80% by weight of propylene, having a MFR of 50 g / in a temperature of 230 ° C. and a load of 2.16 kg. A propylene-based copolymer that is 10 minutes. (A-3) A block copolymer of 15% by weight of an ethylene-propylene copolymer having a propylene content of 55% by weight and 85% by weight of propylene, having a MFR of 70 g / in a temperature of 230 ° C. and a load of 2.16 kg. A propylene-based copolymer that is 10 minutes. (A-4) A block copolymer of 15% by weight of an ethylene-propylene copolymer having a propylene content of 50% by weight and 85% by weight of propylene, having a MFR of 20 g / 230 ° C. and a load of 2.16 kg. A propylene-based copolymer that is 10 minutes. (A-5) The copolymerization ratio of ethylene is 3% by weight, and the MFR at a temperature of 230 ° C. and a load of 2.16 kg is 30 g.
/ 10 min propylene-ethylene random copolymer. (A-6) The copolymerization ratio of ethylene is 5% by weight, and the MFR at a temperature of 230 ° C. and a load of 2.16 kg is 50 g.
/ 10 min propylene-ethylene random copolymer. (A-7) The propylene content is 40% by weight and the temperature is 2
MFR at 30 ° C and a load of 2.16 kg is 1.0 g /
An ethylene-propylene copolymer elastomer that is 10 minutes. (A-8) M at a temperature of 190 ° C. and a load of 2.16 kg
FR (measured according to JIS K6760) is 2.0 g /
High density polyethylene having a density of 0.953 g / cm 3 for 10 minutes.
【００１５】（Ｂ）充填材 （Ｂ−１）平均粒径が２μｍのタルク。 （Ｂ−２）平均粒径が５μｍのタルク。(B) Filler (B-1) Talc having an average particle size of 2 μm. (B-2) Talc having an average particle size of 5 μm.
【００１６】（Ｃ）表皮材 （Ｃ−１）ポリ塩化ビニルレザーとポリプロピレンフォ
ームとの積層体(C) Skin material (C-1) Laminate of polyvinyl chloride leather and polypropylene foam
【００１７】実施例１〜１６、比較例１〜９ 表１及び表２に示される成分の混合物をあらかじめ５分
間ヘンシェルミキサーを使ってブレンドを行った。得ら
れた各混合物を同方向の二軸スクリュー押出機を用い
て、２１０℃で溶融混練を行った。得られた各組成物の
ＭＦＲを測定した後、曲げ弾性率およびデュポン衝撃強
度を測定する試片を１９０℃の樹脂温度において射出成
形し、これらの物性を測定した。実施例および比較例に
おいて、曲げ弾性率はＡＳＴＭ−Ｄ７９０に従って測定
した。また、デュポン衝撃強度は、直径５０ｍｍ、高さ
４０ｍｍの受皿上に、２ｍｍ厚みの平板試片を置き、先
端Ｒが１／４インチの落錐を落下させ、重量と高さの積
算により、エネルギーを求め、デュポン衝撃強度の値と
した。結果を表１及び表２に示す。Examples 1 to 16 and Comparative Examples 1 to 9 A mixture of the components shown in Tables 1 and 2 was blended in advance for 5 minutes using a Henschel mixer. Each of the obtained mixtures was melt-kneaded at 210 ° C. using a twin-screw extruder in the same direction. After measuring the MFR of each of the obtained compositions, test pieces for measuring flexural modulus and DuPont impact strength were injection-molded at a resin temperature of 190 ° C. and their physical properties were measured. In Examples and Comparative Examples, the flexural modulus was measured according to ASTM-D790. The DuPont impact strength was determined by placing a 2 mm thick flat plate sample on a pan with a diameter of 50 mm and a height of 40 mm, dropping a falling cone with a tip R of 1/4 inch, and adding the weight and height to obtain energy. Was calculated as the DuPont impact strength value. The results are shown in Tables 1 and 2.
【００１８】さらに、各組成物を１８０℃にてホットフ
ロースタンピング成形（実施例１〜１１、比較例１〜
７）及び１９０℃にて射出圧縮成形（実施例１２〜１
６、比較例８〜９）を行い、ドアトリムを成形した。そ
の際の表皮材には、ポリ塩化ビニルレザーとポリプロピ
レンフォームの積層体を使用した。その成形性、製品外
観、及び耐タッカー止め試験の結果を表１及び表２に示
す。なお、耐タッカー止め試験の数値は、成形品の１０
０箇所をタッカー止めしたうちの基材の破損が起きた数
である。Further, each composition was hot flow stamped at 180 ° C. (Examples 1 to 11 and Comparative Examples 1 to 1).
7) and injection compression molding at 190 ° C. (Examples 12 to 1)
6 and Comparative Examples 8 to 9) were performed to form a door trim. At that time, a laminate of polyvinyl chloride leather and polypropylene foam was used as the skin material. The moldability, the product appearance, and the result of the anti-tacker test are shown in Tables 1 and 2. The value of the anti-tacker test is 10 for the molded product.
It is the number of breakages of the base material when tacking 0 places with a tacker.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】[0021]
【発明の効果】本発明において、圧縮成形により、製品
外観が良好でかつ耐衝撃性等の機械的特性に優れた成形
品が得られ、下記のごとき効果を発揮する。 （１）圧縮成形における溶融樹脂供給の際、低温での樹
脂供給ができ、ホットフロースタンピング成形の場合１
７０℃での供給が可能である。また、成形品の局部的に
薄い部分やリブ先端、成形品先端部分への樹脂充填性が
極めて良好であり、易成形性であることから、外観の良
好な成形品が得られる。 （２）圧縮成形によって、表皮材を貼り合あわせる際、
基材となる樹脂組成物を低温で供給でき、表皮材へ熱的
なダメージを与えないので、外観の良好な成形品が得ら
れる。 （３）表皮貼り成形品に対するタッカー止めにおいて、
割れも抜けもなく加工できる。例えば自動車内装材等に
おいて、表皮端末をタッカー止めする場合、樹脂基材を
破壊することなく、且つ抜けが無くしっかり固定でき
る。 （４）成形品の剛性が優れている上に、耐衝撃性、特に
面衝撃に対する耐衝撃強度が大きい。 （５）本発明の成形品は、多方面に利用することができ
る。例えば代表的な用途として、ドアトリム、パーセル
シェルフ、ピラー、コンソールボックス、シートバック
パネルなどの自動車の内装部品が挙げられる。EFFECTS OF THE INVENTION In the present invention, by compression molding, a molded product having a good product appearance and excellent mechanical properties such as impact resistance can be obtained, and the following effects are exhibited. (1) When the molten resin is supplied in compression molding, the resin can be supplied at a low temperature, and in the case of hot flow stamping molding 1
It is possible to supply at 70 ° C. In addition, the locally thin portion of the molded product, the rib tip, and the resin filling property to the molded product front end are extremely good, and the moldability is high, so that a molded product having a good appearance can be obtained. (2) When laminating the skin materials by compression molding,
Since the resin composition as the base material can be supplied at a low temperature and the skin material is not thermally damaged, a molded product having a good appearance can be obtained. (3) When tacking against the skin-attached molded product,
It can be processed without cracks or omissions. For example, in a car interior material or the like, when the skin terminal is tackered, the resin base material can be firmly fixed without breaking and without coming off. (4) The molded product is excellent in rigidity and has a large impact resistance, particularly a large impact resistance against surface impact. (5) The molded product of the present invention can be used in various fields. For example, typical applications include interior parts of automobiles such as door trims, parcel shelves, pillars, console boxes, and seat back panels.
───────────────────────────────────────────────────── 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 Ｃ０８Ｋ 3/00 // Ｂ２９Ｋ 23:00 105:16 Ｂ２９Ｌ 9:00 31:58 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location C08K 3/00 // B29K 23:00 105: 16 B29L 9:00 31:58
Claims (3)
重合体を７〜４３重量％含むプロピレン系樹脂７０〜９
５重量％、及び（Ｂ）充填材３０〜５重量％からなり、
温度２３０℃、荷重２．１６ｋｇにおけるメルトフロー
レートが３０〜８０ｇ／１０分である組成物を用いた成
形品。1. A propylene-based resin 70-9 containing (A) 7-43% by weight of a propylene-ethylene random copolymer.
5 wt% and (B) 30 to 5 wt% filler,
A molded article using a composition having a melt flow rate of 30 to 80 g / 10 minutes at a temperature of 230 ° C. and a load of 2.16 kg.
する請求項１記載の成形品。2. The molded product according to claim 1, wherein the molded product is a compression molded product.
る請求項１または２記載の成形品。3. The molded product according to claim 1 or 2, wherein the molded product is a skin-coated product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24813394A JPH08109295A (en) | 1994-10-13 | 1994-10-13 | Molded article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24813394A JPH08109295A (en) | 1994-10-13 | 1994-10-13 | Molded article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08109295A true JPH08109295A (en) | 1996-04-30 |
Family
ID=17173724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24813394A Pending JPH08109295A (en) | 1994-10-13 | 1994-10-13 | Molded article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08109295A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997043338A1 (en) * | 1996-05-13 | 1997-11-20 | Matsushita Electric Industrial Co., Ltd. | Conductive propylene resin composition and parts container |
| JP2001182215A (en) * | 1999-10-15 | 2001-07-03 | Bridgestone Corp | Ceiling panel for unit room |
| JP2001193218A (en) * | 1999-10-15 | 2001-07-17 | Bridgestone Corp | Storage panel for unit room |
| US6863177B2 (en) | 1996-05-13 | 2005-03-08 | Matsushita Electric Industrial Co., Ltd. | Electrically conductive propylene resin composition and part-housing container |
-
1994
- 1994-10-13 JP JP24813394A patent/JPH08109295A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997043338A1 (en) * | 1996-05-13 | 1997-11-20 | Matsushita Electric Industrial Co., Ltd. | Conductive propylene resin composition and parts container |
| US6863177B2 (en) | 1996-05-13 | 2005-03-08 | Matsushita Electric Industrial Co., Ltd. | Electrically conductive propylene resin composition and part-housing container |
| JP2001182215A (en) * | 1999-10-15 | 2001-07-03 | Bridgestone Corp | Ceiling panel for unit room |
| JP2001193218A (en) * | 1999-10-15 | 2001-07-17 | Bridgestone Corp | Storage panel for unit room |
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