JPH07266375A - Composite plastic molded product - Google Patents
Composite plastic molded productInfo
- Publication number
- JPH07266375A JPH07266375A JP7090282A JP9028295A JPH07266375A JP H07266375 A JPH07266375 A JP H07266375A JP 7090282 A JP7090282 A JP 7090282A JP 9028295 A JP9028295 A JP 9028295A JP H07266375 A JPH07266375 A JP H07266375A
- Authority
- JP
- Japan
- Prior art keywords
- polymer
- plastic
- molded product
- block copolymer
- plastic molded
- 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.)
- Granted
Links
Classifications
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、硬質プラスチック成形
材料であるポリプロピレン樹脂と軟質プラスチック成形
材料であるスチレンポリマーとエチレンポリマーとブチ
レンポリマーとのブロックコポリマーとが一体的に融着
している複合プラスチック成形品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite plastic in which a polypropylene resin which is a hard plastic molding material and a block copolymer of styrene polymer, ethylene polymer and butylene polymer which are soft plastic molding materials are integrally fused. Regarding molded products.
【０００２】[0002]
【従来の技術】従来、自動車材料、建築材料、電気製
品、その他あらゆる分野においてプラスチック成形品は
広く使用されており、特に、アルミサッシの枠、自動車
の窓枠、電気製品の各種スイッチやツマミ等の如く、本
体に取り付ける部分は硬く強靭な硬質プラスチックで成
形し、その他の部分を軟質プラスチック或はゴム等のエ
ラストマーで成形し、雨水の浸入を防止したり、或は人
間の手で触れた場合の感触を良くしたり、更には人体が
当たっても怪我や材料の破損がない様にしている場合が
多い。2. Description of the Related Art Conventionally, plastic moldings have been widely used in various fields such as automobile materials, building materials, electric products, and particularly aluminum sash frames, automobile window frames, various switches and knobs for electric products, etc. As shown in the figure, the part to be attached to the main body is molded with hard and tough hard plastic, and the other part is molded with soft plastic or elastomer such as rubber to prevent rainwater from entering or to be touched by human hands. In many cases, they are made to have a good feel, and even if they are hit by the human body, there is no injury or damage to the material.
【０００３】この様な複合プラスチック成形品はあらゆ
る分野で使用されているが、従来はこれらの硬質プラス
チックと軟質プラスチック或はゴムとは異質の材料であ
る為、それらの一体化には接着剤を用いる方法や、両者
の結合部位をオス−メス型の凹凸形状として嵌合させる
方法が行われている。Although such composite plastic molded articles are used in all fields, conventionally, since these hard plastics and soft plastics or rubbers are different materials, an adhesive is used to integrate them. A method of using them and a method of fitting the connecting portions of both as a male-female type uneven shape are performed.
【０００４】[0004]
【発明が解決しようとしている問題点】しかしながら、
接着剤による一体化方法の場合には両部材が異質である
為に、時々接着不良を生じて不良品が発生することが多
い。又、接着剤の使用には殆どの場合に有機溶剤が使用
される為、衛生上も好ましくなく、又、製造上非常に煩
雑である。[Problems to be solved by the invention] However,
In the case of the integration method using an adhesive, since both members are different from each other, defective adhesion often occurs and defective products often occur. In addition, since an organic solvent is used in almost all cases when using an adhesive, it is not preferable in terms of hygiene, and it is very complicated in manufacturing.
【０００５】又、両部材を嵌合させる方法では、各々の
部材を成形する為の金型が複雑で高価であり、又、嵌合
させる作業が非常に煩雑である。従って、硬質プラスチ
ックと軟質プラスチックとからなるプラスチック成形品
を、上記の如き接着剤やオス−メス型の嵌合を用いずに
提供出来る方法が強く要望されている。In the method of fitting both members, the mold for molding each member is complicated and expensive, and the fitting work is very complicated. Therefore, there is a strong demand for a method capable of providing a plastic molded product made of a hard plastic and a soft plastic without using the above-mentioned adhesive or male-female fitting.
【０００６】[0006]
【問題点を解決する為の手段】即ち、本発明は、ポリプ
ロピレン樹脂部材と、スチレンポリマーとエチレンポリ
マーとブチレンポリマーとのブロックコポリマーからな
る立体形状を有する部材とが、その界面において少なく
とも一方が溶融して接着一体化していることを特徴とす
る射出成形複合プラスチック成形品である。That is, according to the present invention, at least one of a polypropylene resin member and a member having a three-dimensional shape composed of a block copolymer of styrene polymer, ethylene polymer and butylene polymer is melted at the interface. It is an injection-molded composite plastic molded product characterized by being bonded and integrated.
【０００７】[0007]
【作用】本発明者は前記の如き従来技術の欠点を解決す
べく鋭意研究の結果、硬質プラスチックとして特定の材
料を選択し、且つ軟質プラスチックとして別の特定の材
料を選択し、両者を組み合わせて射出成形方法で複合プ
ラスチック成形品を得るときは、何らの接着剤も嵌合技
術をも使用しないで十分に一体化した複合プラスチック
成形品が得られることを知見して本発明を完成した。As a result of intensive research to solve the above-mentioned drawbacks of the prior art, the present inventor selects a specific material as the hard plastic and another specific material as the soft plastic, and combines them. The present invention has been completed by finding that, when a composite plastic molded product is obtained by an injection molding method, a fully integrated composite plastic molded product can be obtained without using any adhesive or fitting technology.
【０００８】[0008]
【好ましい実施態様】次に、好ましい実施態様を示す添
付図面に従って本発明を更に具体的に説明する。図１
は、本発明の複合プラスチック成形品１０を図解的に示
したものであり、図２は、従来技術のプラスチック成形
品２０を図解的に示したものであり、図３は、従来技術
の他のプラスチック成形品３０を図解的に示したもので
ある。図中の１，１’，１”は硬質プラスチック成形部
材を、２，２’，２”は軟質プラスチック成形部材を、
そして３，３’，３”は両部材の接合部分を示したもの
である。BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described more specifically with reference to the accompanying drawings showing preferred embodiments. Figure 1
1 schematically shows a composite plastic molded product 10 of the present invention, FIG. 2 schematically shows a conventional plastic molded product 20 , and FIG. 3 shows another conventional plastic molded product. 1 is a schematic view of a plastic molded product 30 . In the figure, 1, 1 ', 1 "are hard plastic molded members, 2, 2', 2" are soft plastic molded members,
And 3,3 ', 3 "shows the joint part of both members.
【０００９】添付図面から明らかな通り、本発明の複合
プラスチック成形品は、硬質プラスチック成形部材と軟
質プラスチック成形部材との一体化に、図２に示す如き
両部材のオス−メス型の凹凸嵌合手段及び図３に示す如
き接着剤をも必要とせず、両部材がその接合部で少なく
とも一方が溶融して密着して立体的且つ一体的に強固に
融着していることを特徴としている。As will be apparent from the accompanying drawings, the composite plastic molded article of the present invention has a hard plastic molding member and a soft plastic molding member integrated with each other as shown in FIG. A means and an adhesive as shown in FIG. 3 are not required, and both members are characterized in that at least one of them is melted and brought into close contact with each other so that they are solidly and integrally fused.
【００１０】以上の如き従来技術の接着剤や嵌合技術を
使用することなく、本発明においても両部材の一体化が
実現出来たのは、本発明において硬質プラスチックとし
てポリプロピレン樹脂を採用し、且つ軟質プラスチック
として熱可塑性エラストマーの１種であるスチレンポリ
マーとエチレンポリマーとブチレンポリマーとのブロッ
クコポリマーを採用し、且つ両部材を射出成形方法で融
着することによる。In the present invention, the integration of both members could be realized without using the above-mentioned conventional adhesives and fitting techniques, because polypropylene resin was adopted as the hard plastic in the present invention, and By adopting a block copolymer of styrene polymer, ethylene polymer and butylene polymer, which is one kind of thermoplastic elastomer, as the soft plastic, and fusing both members by an injection molding method.
【００１１】従来、硬質プラスチックとして非常に多数
のものが知られ、又、軟質プラスチックとしても非常に
多数のものが知られており、両者の単なる融着による接
合は不可能であると考えられており、特にポリプロピレ
ン樹脂の如き無極性材料の接着は、同種のもの以外は殆
ど接合が不可能とされていたが、本発明者の詳細な研究
によれば、この様な不活性なポリプロピレン樹脂に対し
ては、種々の軟質プラスチックのうち、熱可塑性エラス
トマーの１種であるスチレンポリマーとエチレンポリマ
ーとブチレンポリマーとのブロックコポリマーが容易に
融着するこを知見したものである。Conventionally, a very large number of hard plastics and a very large number of soft plastics are known, and it is considered that it is impossible to simply bond the two by fusion. In particular, the non-polar material such as polypropylene resin is almost impossible to be bonded except for the same kind, but according to the detailed study of the present inventor, such an inert polypropylene resin can be used. On the other hand, it was discovered that, among various soft plastics, a block copolymer of styrene polymer, ethylene polymer and butylene polymer, which is one kind of thermoplastic elastomer, is easily fused.
【００１２】本発明において使用するポリプロピレン樹
脂とは、プロピレンモノマーを主体とし、その他共重合
性のオレフィンを少量共重合成分として含有してもよい
重合体であって、従来、各種の繊維、各種の成形用の原
料として広く使用されているものであり、これら従来公
知のポリプロピレン樹脂は、いずれも本発明においてそ
のまま使用することが出来る。The polypropylene resin used in the present invention is a polymer mainly composed of a propylene monomer and may contain a small amount of other copolymerizable olefin as a copolymerization component. It is widely used as a raw material for molding, and any of these conventionally known polypropylene resins can be directly used in the present invention.
【００１３】又、本発明において熱可塑性エラストマー
とは、常温ではゴムと同様な弾性を有するが、加熱によ
って軟化して流動性、即ち、熱可塑性を示す材料であ
り、例えば、スチレンポリマーとブタジエンポリマーと
のブロックコポリマー、ポリエステル系のブロックコポ
リマー、スチレンポリマーとエチレンポリマーとブチレ
ンポリマーとのブロックコポリマー、エチレンポリマー
とプロピレンポリマーとのブロックコポリマー等の各種
の熱可塑性エラストマーが知られており、本発明ではこ
れらのうちのスチレンポリマーとエチレンポリマーとブ
チレンポリマーとのブロックコポリマーを使用すること
を特徴とする。該ブロックコポリマーは、例えば、商品
名、住友ＴＰＥ−ＳＢシリーズとして市場から入手し得
る材料である。In the present invention, the thermoplastic elastomer is a material having elasticity similar to that of rubber at room temperature, but softened by heating to exhibit fluidity, that is, thermoplasticity. For example, styrene polymer and butadiene polymer. Various thermoplastic elastomers such as block copolymers with and block copolymers of polyesters, block copolymers with styrene polymers, ethylene polymers and butylene polymers, block copolymers with ethylene polymers and propylene polymers are known. Of the block copolymers of styrene polymer, ethylene polymer and butylene polymer. The block copolymer is, for example, a material available on the market under the trade name of Sumitomo TPE-SB series.
【００１４】この様なスチレンポリマーとエチレンポリ
マーとブチレンポリマーとのブロックコポリマーは、本
発明者の詳細な研究によれば、特定の成形温度（例え
ば、２００℃以上）において剪断速度１０3 〜１０4 の
範囲においてポリプロピレン樹脂と同様な流動性や粘度
を有する様になるものであり、この様な両者の性質の故
に、従来は不可能とされていたポリプロピレン樹脂との
十分な融着が可能となったものと考えられる。According to the detailed study by the present inventor, such a block copolymer of styrene polymer, ethylene polymer and butylene polymer has a shear rate of 10 3 to 10 4 at a specific molding temperature (for example, 200 ° C. or higher). In the range of, the same flowability and viscosity as the polypropylene resin will be obtained, and due to the properties of both of them, sufficient fusion with the polypropylene resin, which was conventionally impossible, becomes possible. It is believed that
【００１５】以上の如きポリプロピレン樹脂と、スチレ
ンポリマーとエチレンポリマーとブチレンポリマーとの
ブロックコポリマーからなる本発明の複合プラスチック
成形品は、両部材が立体的且つ一体的に融着している限
りいずれの形状でもよいが、最も有用な形状は、ポリプ
ロピレン成形部材が固定部材であって、スチレンポリマ
ーとエチレンポリマーとブチレンポリマーとのブロック
コポリマー成形部材が可動或は接触部材である形状、例
えば、建築材料、特にアルミサッシの枠や自動車等の開
閉部材に設ける密封部材用としての形状である。The composite plastic molded article of the present invention comprising the polypropylene resin and the block copolymer of the styrene polymer, the ethylene polymer and the butylene polymer may be of any type as long as both members are fused three-dimensionally and integrally. Although it may be a shape, the most useful shape is a shape in which a polypropylene molded member is a fixed member and a block copolymer molded member of a styrene polymer, an ethylene polymer and a butylene polymer is a movable or contact member, for example, a building material, In particular, the shape is for a sealing member provided on a frame of an aluminum sash or an opening / closing member of an automobile or the like.
【００１６】この様な本発明の複合プラスチック成形品
は射出成形方法で製造し、先ず硬質プラスチック成形材
料であるポリプロピレン樹脂を金型内に射出注入成形
し、次いでスチレンポリマーとエチレンポリマーとブチ
レンポリマーとのブロックコポリマーを射出注入して、
成形と同時に両者を融着させる射出成形方法である。成
形条件自体は従来の一般的成形条件と同様でよく、公知
の２色成形機が硬質部分と軟質部分を同時に成形するこ
とが出来、量産に最適であるが、ポリプロピレン樹脂を
一旦成形し、型から取り出した硬質プラスチック部分
に、インサート方式を利用してスチレンポリマーとエチ
レンポリマーとブチレンポリマーとのブロックコポリマ
ーを一体成形させてもよい。The composite plastic molded article of the present invention as described above is manufactured by an injection molding method. First, a polypropylene resin, which is a hard plastic molding material, is injection-molded in a mold, and then a styrene polymer, an ethylene polymer and a butylene polymer. Injection injection of block copolymer of
This is an injection molding method in which both are fused at the same time as molding. The molding condition itself may be the same as the conventional general molding condition, and the known two-color molding machine can mold the hard part and the soft part at the same time, which is ideal for mass production. A block copolymer of a styrene polymer, an ethylene polymer and a butylene polymer may be integrally formed on the hard plastic part taken out from the mold using an insert method.
【００１７】[0017]
【実施例】次に実施例を挙げて本発明を更に具体的に説
明する。射出成形機としてＤＣ１００−２００型２色成
形機（日精樹脂工業株式会社製造）を使用し、ポリプロ
ピレン樹脂を２００℃〜２３０℃の温度で溶融し、図１
の如きキャビティ形状を有する５０℃の温度の金型内に
射出注入した。これによって図１の１の形状のポリプロ
ピレン成形体が成形される。次に上記ポリプロピレン樹
脂成形体が固化したら、スチレンポリマーとエチレンポ
リマーとブチレンポリマーとのブロックコポリマー（住
友ＴＰＥ）を１８０℃〜２４０℃の温度で溶融して同一
の金型に射出注入させた。これによって図１の２の形状
のＴＰＥ成形体が形成される。金型を冷却後金型を開
き、図１の如き複合プラスチック成形品を得た。EXAMPLES Next, the present invention will be described more specifically with reference to examples. A DC100-200 two-color molding machine (manufactured by Nissei Plastic Industry Co., Ltd.) is used as an injection molding machine, and polypropylene resin is melted at a temperature of 200 ° C. to 230 ° C.
It was injection-injected into a mold having a cavity shape as described above at a temperature of 50 ° C. As a result, a polypropylene molded body having the shape of FIG. 1 is molded. Next, when the polypropylene resin molded body was solidified, a block copolymer of styrene polymer, ethylene polymer and butylene polymer (Sumitomo TPE) was melted at a temperature of 180 ° C. to 240 ° C. and injected into the same mold. As a result, a TPE molded product having the shape 2 in FIG. 1 is formed. After cooling the mold, the mold was opened to obtain a composite plastic molded product as shown in FIG.
【００１８】この成形品はポリプロピレン樹脂部分とス
チレンポリマーとエチレンポリマーとブチレンポリマー
とのブロックコポリマー部分との境界部において両者が
共に溶融接着して完全に一体化しており剥離不能であっ
た。尚、ポリプロピレン樹脂を着色する場合、例えば、
黒く着色するときはポリプロピレン樹脂１００部に対
し、カーボンブラック１部（重量比）を混入する。This molded product was melt-bonded together at the boundary between the polypropylene resin portion and the block copolymer portion of the styrene polymer, the ethylene polymer and the butylene polymer, and they were completely integrated, and could not be peeled off. When the polypropylene resin is colored, for example,
When coloring black, 1 part (weight ratio) of carbon black is mixed with 100 parts of polypropylene resin.
【００１９】[0019]
【効果】以上の如き本発明方法によれば、硬質プラスチ
ック成形材料であるポリプロピレン樹脂と軟質プラスチ
ック成形材料であるスチレンポリマーとエチレンポリマ
ーとブチレンポリマーとのブロックコポリマーとの複合
プラスチック成形品が単なる両者の射出成形で得ること
が出来る。従って、従来の嵌合法の如き複雑で高価な金
型の使用は不要となり、又、接着剤も全く使用する必要
がないので極めて経済的に、一体化した優れた複合プラ
スチック成形品を提供することが可能となった。[Effect] According to the method of the present invention as described above, a composite plastic molded product of a polypropylene resin, which is a hard plastic molding material, and a block copolymer of styrene polymer, ethylene polymer, and butylene polymer, which is a soft plastic molding material, can be obtained by simply combining both. It can be obtained by injection molding. Therefore, it is not necessary to use a complicated and expensive mold like the conventional fitting method, and it is not necessary to use an adhesive at all. Therefore, it is possible to provide an excellent integrated composite plastic molded product extremely economically. Became possible.
【００２０】[0020]
【図１】本発明の複合プラスチック成形品の断面を図解
的に示す図。FIG. 1 is a diagram schematically showing a cross section of a composite plastic molded product of the present invention.
【図２】従来技術のプラスチック成形品の断面を図解的
に示す図。FIG. 2 is a diagram schematically showing a cross section of a conventional plastic molded product.
【図３】従来技術のプラスチック成形品の断面を図解的
に示す図。FIG. 3 is a diagram schematically showing a cross section of a conventional plastic molded product.
１，１’，１”‥‥‥硬質プラスチック成形部材 ２，２’，２”‥‥‥軟質プラスチック成形部材 ３，３’，３”‥‥‥接合部分 1,1 ', 1 "... Hard plastic molded member 2, 2', 2" ... Soft plastic molded member 3, 3 ', 3 "
───────────────────────────────────────────────────── 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 Ｂ２９Ｌ 9:00 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location B29L 9:00
Claims (2)
リマーとエチレンポリマーとブチレンポリマーとのブロ
ックコポリマーからなる立体形状を有する部材とが、そ
の界面において少なくとも一方が溶融して接着一体化し
ていることを特徴とする射出成形複合プラスチック成形
品。1. A polypropylene resin member and a member having a three-dimensional shape made of a block copolymer of a styrene polymer, an ethylene polymer and a butylene polymer, at least one of which is melted and bonded and integrated at an interface thereof. Injection molded composite plastic molded product.
て、スチレンポリマーとエチレンポリマーとブチレンポ
リマーとのブロックコポリマー部材が可動或は接触部材
である請求項１に記載の複合プラスチック成形品。2. The composite plastic molded article according to claim 1, wherein the polypropylene member is a fixed member and the block copolymer member of styrene polymer, ethylene polymer and butylene polymer is a movable or contact member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7090282A JP2527157B2 (en) | 1995-03-23 | 1995-03-23 | Composite plastic molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7090282A JP2527157B2 (en) | 1995-03-23 | 1995-03-23 | Composite plastic molding |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1208783A Division JPH0825225B2 (en) | 1989-08-11 | 1989-08-11 | Method for manufacturing composite plastic molded product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07266375A true JPH07266375A (en) | 1995-10-17 |
| JP2527157B2 JP2527157B2 (en) | 1996-08-21 |
Family
ID=13994169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7090282A Expired - Lifetime JP2527157B2 (en) | 1995-03-23 | 1995-03-23 | Composite plastic molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2527157B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52121663A (en) * | 1976-04-07 | 1977-10-13 | Nippon Petrochemicals Co Ltd | Method of producing antiskid thermoplastic resin molded article |
| JPS5840488A (en) * | 1981-09-03 | 1983-03-09 | 神鋼電機株式会社 | Electromagnetic agitator for molten metal |
| US4385025A (en) * | 1979-10-22 | 1983-05-24 | Barry Wright Corporation | Method of coinjection molding of thermoplastic and thermoplastic elastomer |
| JPS6124050U (en) * | 1984-07-16 | 1986-02-13 | アロン化成株式会社 | Medicine stopper for infusion container |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5527008A (en) * | 1978-08-14 | 1980-02-26 | Babcock Hitachi Kk | Ball for grinding mill |
-
1995
- 1995-03-23 JP JP7090282A patent/JP2527157B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52121663A (en) * | 1976-04-07 | 1977-10-13 | Nippon Petrochemicals Co Ltd | Method of producing antiskid thermoplastic resin molded article |
| US4385025A (en) * | 1979-10-22 | 1983-05-24 | Barry Wright Corporation | Method of coinjection molding of thermoplastic and thermoplastic elastomer |
| JPS5840488A (en) * | 1981-09-03 | 1983-03-09 | 神鋼電機株式会社 | Electromagnetic agitator for molten metal |
| JPS6124050U (en) * | 1984-07-16 | 1986-02-13 | アロン化成株式会社 | Medicine stopper for infusion container |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2527157B2 (en) | 1996-08-21 |
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