JPH0813535B2 - Plate-shaped composite molded article and manufacturing method thereof - Google Patents
Plate-shaped composite molded article and manufacturing method thereofInfo
- Publication number
- JPH0813535B2 JPH0813535B2 JP2267308A JP26730890A JPH0813535B2 JP H0813535 B2 JPH0813535 B2 JP H0813535B2 JP 2267308 A JP2267308 A JP 2267308A JP 26730890 A JP26730890 A JP 26730890A JP H0813535 B2 JPH0813535 B2 JP H0813535B2
- Authority
- JP
- Japan
- Prior art keywords
- molded article
- molding
- plate
- molded product
- primary
- 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 - Fee Related
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は平面又は曲面状の板状物、又は板状部を含む
成形品で、２種のポリエステル系樹脂材料より成りそれ
自体は屈曲し難く、その表面は柔軟性を有し、しかも成
形時にそり変形等の少ない複合成形品を提供するもの
で、ソフトな感触の要求される物品、衝撃や振動吸収性
の要求される物品等、かかる特性の要求される各種物
品、機器部品、工具等に好適な複合成形品及びその製造
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a flat or curved plate-like object, or a molded article including a plate-like portion, which is made of two kinds of polyester resin materials and bends itself. It is difficult to provide a composite molded article having a flexible surface and less warp deformation during molding, such as articles requiring a soft feel, articles requiring shock and vibration absorption, etc. The present invention relates to a composite molded article suitable for various articles, equipment parts, tools, etc., which are required to have properties, and a method for producing the same.
成形品自体は撓み抵抗を有し、屈曲変形を生じ難く、
その表面が柔軟性を有する様な特性の要求される板状成
形品、又はかかる板状部を有する成形品の用途が数多く
存在するが、同一の樹脂材料より成形したものでは、例
えば剛性の高い材料を使用したのでは表面の柔軟性がな
く、又柔軟な材料を用いたものは成形品全体が柔軟で、
撓み抵抗が小さく容易に屈曲し、上記の要求を満足し得
ない。従って上記の如く成形品全体としては撓み抵抗を
有しあまり屈曲変形することなく、その表面のみ柔軟性
を有する成形品を得るには剛性の高い硬質材料と柔軟性
のある軟質材料との組合せにより構成せざるを得ないの
が現状である。The molded product itself has bending resistance, making it difficult to cause bending deformation.
There are many uses of a plate-shaped molded product that requires characteristics such that its surface has flexibility, or a molded product having such a plate-shaped portion, but when molded from the same resin material, for example, it has high rigidity. When using a material, the surface is not flexible, and when using a flexible material, the entire molded product is flexible,
The flexural resistance is small and it bends easily, and the above requirements cannot be satisfied. Therefore, in order to obtain a molded product that has flexural resistance as a whole and does not bend and deform so much as described above, and only its surface has flexibility, use a combination of a hard material with high rigidity and a soft material with flexibility. The current situation is that we have no choice but to configure it.
かかる２種材料より成る成形品を得るために従来より
一般に行われている方法は、主として金属材料を一次成
形品としその上に軟質の樹脂材料を成形した、いわゆる
インサート（又はアウトサート）成形法が広く知られて
いるが、かかる方法より得た成形品は金属を使用するた
め高重量となり、又両材料の界面の接着が不充分で剥離
しやすく、更に腐食性がある等の欠点を有し、その用途
が制限されている。また、軽量化のため両材料何れも樹
脂材料を使用し、一次成形品として硬質樹脂材料を用い
て基体の成形を行い、二次材料として軟質樹脂材料によ
り表層を形成する、いわゆる二重成形又は二色成形（以
後これらを総称して二重成形等という）が考えられる
が、この場合も一般に２種の異なる材料を使用するため
その接合部が剥離しやすく、強く融着させるためには一
次成形品上に接着剤を塗布して二次成形を行う等の煩雑
さを伴い、好ましくない。またそれらの機械的性質、耐
熱性、化学的性質にも問題がある。従って強固に融着し
た複合成形品を簡単な二重成形法等により得るために
は、２種の材料の組合せを充分選択検討する必要があ
り、本発明者らは先に一次成形材料として硬質の熱可塑
性ポリエステル樹脂を主体とする樹脂材料を使用して成
形した一次成形品上に、熱可塑性ポリエステルエラスト
マーを主とする樹脂材料を二次材料として、二重成形法
等により複合化した成形品は他の組合せに見られない強
固な融着強度を有し、両層が剥離し難く、他の諸物性も
良好であることを見出し、平成２年９月10日付けで特許
出願した。A conventional method generally used to obtain a molded article composed of such two kinds of materials is a so-called insert (or outsert) molding method in which a metal material is mainly used as a primary molded article and a soft resin material is molded thereon. However, since the molded product obtained by such a method uses a metal, the molded product has a high weight, and the interface between the two materials is insufficiently adhered and easily peeled off. However, its use is limited. Further, in order to reduce the weight, both materials are resin materials, the base is molded by using a hard resin material as a primary molded product, and the surface layer is formed by a soft resin material as a secondary material. Two-color molding (hereinafter collectively referred to as double molding, etc.) is conceivable. In this case as well, since two different materials are generally used, the joint part is easily peeled off, and in order to achieve strong fusion, the primary It is not preferable because it involves complications such as applying an adhesive onto a molded product and performing secondary molding. There are also problems with their mechanical properties, heat resistance, and chemical properties. Therefore, in order to obtain a strongly fused composite molded article by a simple double molding method or the like, it is necessary to sufficiently select and study a combination of two kinds of materials, and the present inventors have previously conducted a hard molding as a primary molding material. Molded product in which the resin material mainly composed of thermoplastic polyester elastomer is used as the secondary material on the primary molded product molded using the resin material composed mainly of the thermoplastic polyester resin of Has a strong fusion bond strength not seen in other combinations, is difficult to peel off both layers, and has other good physical properties, and applied for a patent on September 10, 1990.
かかる複合成形品は外観もよく２樹脂間の融着強度も
充分なものが得られその他の物性も良好であるが、板状
の成形品の場合には二次成形において固化時に収縮等に
よりそり変形を生じ易く、正確な形状の複合成形品が得
難い等の問題が生じた。Such a composite molded article has a good appearance and a sufficient fusion bond strength between the two resins, and other physical properties are also good. However, in the case of a plate-shaped molded article, it is warped due to shrinkage during solidification in the secondary molding. There is a problem such that deformation is likely to occur and it is difficult to obtain a composite molded product having an accurate shape.
そこで本発明者らは、それ自体は屈曲等の変形を生じ
難く、その表面は柔軟性を有する板状又は板状部を有す
る複合成形品で、しかも前述の如き、問題点、即ち軽量
化、融着力（樹脂間の剥離強度）、成形品の外観、機械
的物性、耐熱性、化学的性質等の諸性質を均等に保持
し、特に成形時のそり変形を生じることのない正確な形
状の板状の複合成形品を得ることを目的として、その材
料の組合せの選択、及び形状構造等の面より鋭意研究を
重ね本発明を完成するに至った。Therefore, the present inventors themselves are unlikely to cause deformation such as bending, and the surface thereof is a composite molded article having a plate-shaped or plate-shaped portion having flexibility, and as described above, the problem, namely, weight reduction, Various properties such as fusion strength (peeling strength between resins), appearance of molded products, mechanical properties, heat resistance, chemical properties, etc. are maintained evenly, and in particular an accurate shape that does not cause warpage deformation during molding For the purpose of obtaining a plate-shaped composite molded article, the present invention has been completed through intensive studies in terms of selection of the combination of materials and shape and structure.
即ち、本発明は、板状、又は板状部を含む複合成形品
の成形において、一次成形品として硬質熱可塑性ポリエ
ステルを主とする樹脂材料よりなる基体成形品上に、二
次成形材料として軟質熱可塑性ポリエステルエラストマ
ーを主体とする樹脂材料を用いて二重成形又は二色成形
法により複合成形するにあたり、一次成形品の板状部の
表裏両面を、ほぼ対称的に二次材料にて融着被覆又は挟
着するよう二次成形して一体化することを特徴とする、
そり変形が少なく、成形品自体は屈曲抵抗を有し、その
表面は柔軟性を持つ板状部を有する複合成形品の製造法
及びかかる方法によって成形された複合成形品である。That is, the present invention, in the molding of a plate-shaped, or a composite molded product including a plate-shaped portion, on the base molded product made of a resin material mainly hard thermoplastic polyester as a primary molded product, a soft as a secondary molding material. When compounding by double molding or two-color molding using a resin material mainly composed of thermoplastic polyester elastomer, the front and back surfaces of the plate-shaped part of the primary molded product are fused almost symmetrically with the secondary material. Characterized by secondary molding and integration so as to cover or sandwich.
A method for producing a composite molded article having less warpage deformation, a molded article itself having a bending resistance, and a surface having a flexible plate-like portion, and a composite molded article molded by such a method.
本発明の複合成形品は形状的には板状物、或いは板状
部の組合せにより構成される成形品、例えば箱形、断面
Ｌ型、Ｈ型、円弧型等の成形品、或いは板状部を含む形
状例えばボビンのつば部、フランジ等を対象とするもの
であり、その板状部は平板状のみならず湾曲した板状の
ものであってもよい（以下、これらを総称して板状成形
品とする）。The composite molded product of the present invention is a plate-shaped product in terms of shape, or a molded product formed by a combination of plate-shaped parts, for example, a box-shaped, L-shaped, H-shaped, arc-shaped molded product or a plate-shaped part. Including shapes such as a bobbin collar and flange, the plate-shaped portion may be not only a flat plate-shaped but also a curved plate-shaped (hereinafter, these are collectively referred to as plate-shaped. Articles).
本発明の板状複合成形品は一次材料（基体成形品）と
して硬質の熱可塑性ポリエステルを主とする樹脂材料を
使用し、二次材料としてその表面部に軟質の熱可塑性ポ
リエステルエラストマーを主とする樹脂材料を使用し
て、二重成形法等により複合化したもので、かかる特定
の２種のポリエステル系樹脂材料を組合せ使用すること
に特徴がある。In the plate-shaped composite molded article of the present invention, a resin material mainly composed of hard thermoplastic polyester is used as a primary material (base molded article), and a soft thermoplastic polyester elastomer is mainly composed on the surface portion as a secondary material. The resin material is made into a composite by a double molding method or the like, and is characterized in that the two specific polyester resin materials are used in combination.
前述の如く一般に硬質の熱可塑性樹脂を一次成形品と
し、軟質の熱可塑性樹脂を二次材料として二重成形法等
により成形した複合成形品は一般に両者の融着強度が不
充分であるばかりでなく、外観、その他機械的、熱的、
化学的性質等を均等に満足するものが得難いが、本発明
の特定樹脂材料の組合せ、即ち一次成形品として硬質の
熱可塑性ポリエステルを主とする樹脂材料を使用し、そ
の上に二次材料として軟質の熱可塑性ポリエステルエラ
ストマーを主とする樹脂材料を使用することによって上
記各物性を満足する複合成形品が得られる（両樹脂材料
については後述する）。As described above, generally, a composite molded article obtained by molding a hard thermoplastic resin as a primary molded article and a soft thermoplastic resin as a secondary material by a double molding method or the like generally has insufficient fusion strength between the two. No appearance, other mechanical, thermal,
Although it is difficult to obtain one that satisfies the chemical properties evenly, it is difficult to obtain a combination of the specific resin materials of the present invention, that is, a resin material mainly composed of a hard thermoplastic polyester is used as a primary molded product, and as a secondary material on it. By using a resin material mainly composed of a soft thermoplastic polyester elastomer, a composite molded article satisfying the above physical properties can be obtained (both resin materials will be described later).
しかし、前述の如く、板状成形品に於ては、かかる特
定樹脂の組合せを採用しても単に成形品の柔軟性を要す
る表面部分にのみ二次材料を複合化したのでは、二次成
形の際、そり変形を生じやすく、例えば平板状の成形品
では真平面が得られない等、最終成形品の形状の精度に
難点があり、この点を解決するため更に板状複合成形品
の形成において、二次材料の形状構造の面で検討を加
え、基体となる硬質の一次成形板状物の表裏両面を、二
次成形材料である軟質の熱可塑性ポリエステルエラスト
マーを主体とする樹脂材料にて融着被覆又はサンドイッ
チ状に挟着するように複合成形することによって二次成
形時のそり変形の発生を著しく防止することに成功し、
この点に本発明の第２の特徴を有する。即ち本発明の複
合成形品は、柔軟性を要する面のみでなく、その反対の
面にも、柔軟性のあるポリエステルエラストマー系の樹
脂材料でほぼ対称的に複合化することにある。具体的に
は二重成形等において、一次成形品の適当な位置に予め
貫通孔を設けるか、或はその一部に切欠き部を設け、こ
れを二次成形用金型で支持して、二次成形を行い、二次
材料の樹脂流が同時に一次成形板の表裏両面に達するよ
うにすることによって達成される。この場合二次材料は
必ずしも一次成形品である板状物の両面全面にわたって
被覆する必要はなく、設計上特に柔軟な部分を要する面
の特定部分を対象として、この部分にほぼ対応する反対
側の面も二次材料で被覆又は挟着するようにすればよ
い。この場合必ずしも二次材料は表裏両面を全く同様に
複合被覆する必要はないが、そり変形防止の見地から出
来るだけ両面の対称的な位置に略同様の厚さで二次材料
が複合化されることが望ましく、表裏の二次材料が位
置、面積、厚さ等において著しくアンバランスである場
合にはそり変形の防止効果も削減される。However, as mentioned above, in the plate-shaped molded product, even if such a combination of specific resins is adopted, if the secondary material is compounded only on the surface portion that requires flexibility of the molded product, In this case, there is a problem in the accuracy of the shape of the final molded product, such as warpage deformation that tends to occur, and a flat surface cannot be obtained with a flat molded product, for example. In addition, in consideration of the shape and structure of the secondary material, both front and back surfaces of the hard primary molding plate-like material as the base are made of a resin material mainly composed of the soft thermoplastic polyester elastomer which is the secondary molding material. Succeeded in significantly preventing warpage deformation during secondary molding by composite molding so as to be fused and sandwiched or sandwiched,
This point has the 2nd characteristic of this invention. That is, the composite molded article of the present invention is to be composited substantially symmetrically not only on the surface requiring flexibility but also on the opposite surface thereof with a flexible polyester elastomer resin material. Specifically, in double molding, etc., a through hole is provided in advance at an appropriate position of the primary molded product, or a notch part is provided in a part thereof, and this is supported by a secondary molding die, This is achieved by performing secondary molding so that the resin flow of the secondary material reaches both the front and back surfaces of the primary molding plate at the same time. In this case, the secondary material does not necessarily need to cover the entire surfaces of both sides of the plate-shaped product that is the primary molded product. The surface may be covered or sandwiched with the secondary material. In this case, the secondary material does not necessarily need to be compositely coated on the front and back sides in exactly the same way, but from the viewpoint of warpage deformation prevention, the secondary material is composited at symmetrical positions on both sides with approximately the same thickness as possible. Desirably, when the secondary materials on the front and back sides are significantly unbalanced in terms of position, area, thickness, etc., the effect of preventing warpage deformation is also reduced.
次に一次材料及び二次材料について説明すると、一次
材料として使用する樹脂材料としては硬質の熱可塑性ポ
リエステルを主体とする樹脂材料であれば何れにてもよ
いが、本来本発明の複合成形品はそれ自体としては撓み
抵抗性を有し、屈曲し難いことを目的とするものである
から曲げ弾性率が少なくとも15000kgf/cm2以上のポリエ
ステル系樹脂であることが必要であり、好ましくは2000
0kgf/cm2以上である。Next, the primary material and the secondary material will be described. As the resin material used as the primary material, any resin material having a hard thermoplastic polyester as a main component may be used, but the composite molded article of the present invention is originally As such, it has a bending resistance, and since it is intended to be difficult to bend, it is necessary that the flexural modulus is at least 15000 kgf / cm 2 or more polyester resin, and preferably 2000.
It is 0 kgf / cm 2 or more.
具体的にはポリブチレンテレフタレート、ポリエチレ
ンテレフタレートで代表されるポリアルキレンテレフタ
レート（アルキレン基の炭素数２〜４）又はこれらを主
成分とする公知の共重合体、或いは補助的に他の熱可塑
性樹脂を少量配合したものであってもよい。Specifically, polybutylene terephthalate, polyalkylene terephthalate represented by polyethylene terephthalate (the number of carbon atoms of the alkylene group is 2 to 4) or a known copolymer containing them as a main component, or other thermoplastic resin supplementarily is added. It may be blended in a small amount.
かかる一次樹脂材料は二次成形において二次材料によ
って融着する必要があるため、著しく高融点のものは二
次成形における二次材料の樹脂温度をそれ以上に高くす
る必要が生じるため熱分解を生じ易く、又異常な粘度低
下を生じて成形上問題が生ずる場合もあるので、一次材
料の融点が230℃以下の材料を選定することが好まし
い。特に好ましくは220℃以下である。Since such a primary resin material needs to be fused by the secondary material in the secondary molding, a resin having a remarkably high melting point needs to raise the resin temperature of the secondary material in the secondary molding to be higher than that, thereby causing thermal decomposition. It is apt to occur, and an abnormal decrease in viscosity may occur to cause problems in molding. Therefore, it is preferable to select a material having a melting point of 230 ° C. or less as the primary material. It is particularly preferably 220 ° C or lower.
かかる観点から一次材料として好ましいものはポリブ
チレンテレフタレート又はこれを主成分とする共重合体
又は混合体が好ましい。共重合成分の種類は特に限定す
るものではなく公知の共重合成分が用いられるが、その
導入量は剛性の見地から40％以下であることが望まし
い。From this viewpoint, polybutylene terephthalate or a copolymer or mixture containing it as a main component is preferable as the primary material. The type of the copolymerization component is not particularly limited, and a known copolymerization component is used, but the amount introduced is preferably 40% or less from the viewpoint of rigidity.
又、一次材料としてはその機械的物性を補強し、耐熱
性（熱変形温度）、寸法精度等の見地から、又特に最終
成形品の撓み抵抗を増大させる面で、無機充填剤を配合
したものが好ましい場合が多い。無機充填剤としてはガ
ラス繊維、炭素繊維の如き繊維状強化剤、ガラスフレー
ク、ガラス粉、ガラスビーズ、マイカ、炭酸カルシウ
ム、その他の粒状又は板状の充填剤が挙げられるが、こ
れに限定したものではなく、公知の何れの無機充填剤も
その目的とする物性を付与するため選択使用することが
出来る。無機充填剤は二種以上を併用してもよい。In addition, as a primary material, an inorganic filler is blended to reinforce its mechanical properties, from the viewpoint of heat resistance (heat deformation temperature), dimensional accuracy, etc., and especially to increase the bending resistance of the final molded product. Is often preferred. Examples of the inorganic filler include glass fibers, fibrous reinforcing agents such as carbon fibers, glass flakes, glass powder, glass beads, mica, calcium carbonate, and other granular or plate-like fillers, but are not limited thereto. Instead, any known inorganic filler can be selected and used to impart the desired physical properties. Two or more inorganic fillers may be used in combination.
又、一次材料としては他の熱可塑性樹脂を少量補助的
に配合してもよい。一次材料の融点、剛性その他の物性
は使用する熱可塑性ポリエステルの種類、共重合成分に
種類と量、他の補助的熱可塑性樹脂の種類と配合量、無
機充填剤の種類と配合量等によって目的に応じ調節する
ことが可能である。Further, as the primary material, a small amount of other thermoplastic resin may be supplementarily added. The melting point, rigidity and other physical properties of the primary material are determined by the type of thermoplastic polyester used, the type and amount of the copolymerization component, the type and amount of other auxiliary thermoplastic resin, the type and amount of inorganic filler, etc. It is possible to adjust according to.
次に本発明の板状複合成形品の柔軟な表面部分を形成
するための樹脂材料は熱可塑性ポリエステルエラストマ
ーを主体とするものであり、柔軟性を付与する目的か
ら、一般的には曲げ弾性率が10000kg/cm2以下のものが
好ましい。更に好ましくは7000kg/cm2以下のものであ
る。Next, the resin material for forming the flexible surface portion of the plate-shaped composite molded article of the present invention is mainly composed of a thermoplastic polyester elastomer, and generally has a flexural modulus for the purpose of imparting flexibility. Is preferably 10,000 kg / cm 2 or less. More preferably, it is 7,000 kg / cm 2 or less.
かかる二次材料を構成する主成分のポリエステルエラ
ストマーはポリオキシアルキレングリコールエステルの
如きソフトセグメントを構成単位とするランダム又はブ
ロック共重合ポリエステルであれば何れにてもよく任意
の市販品又は調製品を使用することが出来る。The main component polyester elastomer constituting the secondary material may be any random or block copolymerized polyester having a soft segment as a constitutional unit such as polyoxyalkylene glycol ester, and any commercially available product or preparation may be used. You can do it.
代表的なものはポリオキシエチレングリコール又はポ
リオキシブチレングリコールのフタル酸エステルをセグ
メントとし、ブチレンテレフタレート又はエチレンテレ
フタレートを他の構成単位とするポリエステル共重合体
である。A typical example is a polyester copolymer having phthalate ester of polyoxyethylene glycol or polyoxybutylene glycol as a segment and butylene terephthalate or ethylene terephthalate as another constituent unit.
又、少量の他の熱可塑性樹脂が補助的に配合されたも
のであってもよい。複合成形品の表面部の柔軟性の程度
はかかる二次材料を構成するポリエステルエラストマー
中のソフトセグメント、例えばポリオキシアルキレング
リコールエステルセグメントの含有量、そのセグメント
の分子量、その他の共重合成分又は他の補助的添加樹脂
等を適宜選択することによって目的とする値に調整され
る。Further, a small amount of other thermoplastic resin may be supplemented. The degree of flexibility of the surface portion of the composite molded article depends on the content of the soft segment in the polyester elastomer constituting the secondary material, for example, the content of the polyoxyalkylene glycol ester segment, the molecular weight of the segment, other copolymerization components or other It is adjusted to a target value by appropriately selecting an auxiliary addition resin and the like.
本発明の板状複合成形品は前記の硬質一次材料を用い
て一次成形した板状基体成形品上の柔軟性を要する部分
を対象にその表裏両面を略対称的に二重成形法等により
二次材料にて被覆するよう成形し融着するもので、二次
成形における二次材料の樹脂温度は少なくとも一次材料
の融点以上とする必要があり、好ましくは一次材料の融
点より10〜70℃高い樹脂温度とすることが融着を強固に
する上で望ましい。The plate-shaped composite molded product of the present invention is a plate-shaped substrate molded product that is primarily molded using the above-mentioned hard primary material. It is molded and fused so as to cover with the next material, and the resin temperature of the second material in the second molding must be at least the melting point of the first material or higher, preferably 10 to 70 ° C higher than the melting point of the first material. The resin temperature is desirable for strengthening the fusion.
本発明の板状複合成形品は前述の如き特定の２種のポ
リエステル系樹脂材料を選択使用することにより、 （１）成形品一体としては高い撓み抵抗を有し、多少の
外力では屈曲し難く、 （２）しかも表面は柔軟性を保ち （３）基体と表面柔軟部分とが強固に融着して、剥離し
難く （４）機械的物性、耐熱性、耐化学薬品性にも優れ （５）しかも軽量である。The plate-shaped composite molded article of the present invention is selected by using the above-mentioned two specific polyester resin materials. (1) The molded article integrally has a high bending resistance and is difficult to bend with some external force. (2) Moreover, the surface keeps flexibility (3) The base and the surface soft portion are firmly fused and hardly peeled off. (4) Excellent in mechanical properties, heat resistance and chemical resistance (5) ) Moreover, it is lightweight.
又、二次成形において二次材料が板状基体成形品の表
裏両面を被覆又は挟持しているため （６）成形時のそり変形を防止し精確な寸法、形状の板
状成形品が得られ、 かかる特性の要求される多くの用途に好適である。Further, in the secondary molding, since the secondary material covers or sandwiches both the front and back surfaces of the plate-shaped substrate molded product, (6) warpage deformation at the time of molding is prevented, and a plate-shaped molded product of accurate size and shape can be obtained. It is suitable for many applications where such characteristics are required.
以下実施例により本発明を更に具体的に説明するが、
本発明はこれらに限定されるものではない。Hereinafter, the present invention will be described more specifically with reference to Examples.
The present invention is not limited to these.
実施例１〜３ 一次材料として Ａ−1: ポリブチレンテレフタレート樹脂（融点225℃、曲げ弾
性率約26000kg/cm2） Ａ−2: ポリブチレンイソフタレートを少量含有するポリブチレ
ンテレフタレート共重合樹脂（融点205℃、曲げ弾性率
約26000kg/cm2） Ａ−3: Ａ−２のポリブチレンテレフタレート共重合樹脂にガラ
ス繊維20％、ガラスフレーク20％を配合した組成物（曲
げ弾性率約90000kg/cm2） の夫々を一次成形して、図−１に示す如き底板部中央に
貫通孔を有する箱を成形した。次にこの箱形一次成形品
を二次成形用金型キャビティーに装着し、二次材料とし
て Ｂ−1:ポリエステルエラストマー（融点182℃、曲げ弾
性率720kg/cm2）を用いて、樹脂温度250℃にて、二次成
形を行い、図−２に示す如く箱型一次成形品の底板部の
表裏両面をほぼ均等な厚さで溶融挾着した複合成形品を
作成し、二次成形後のそり変形量、外観、屈曲抵抗、表
面硬度等の特性を評価した。Examples 1 to 3 as primary materials A-1: polybutylene terephthalate resin (melting point 225 ° C., flexural modulus about 26000 kg / cm 2 ) A-2: polybutylene terephthalate copolymer resin containing a small amount of polybutylene terephthalate (melting point 205 ° C., flexural modulus of about 26000 kg / cm 2 ) A-3: A composition in which 20% of glass fibers and 20% of glass flakes are mixed with the polybutylene terephthalate copolymer resin of A-2 (flexural modulus of about 90,000 kg / cm 2 1) was primary-molded to form a box having a through hole at the center of the bottom plate as shown in FIG. Next, this box-shaped primary molded product was mounted in the secondary molding die cavity, and the resin temperature was adjusted by using B-1: polyester elastomer (melting point 182 ° C, bending elastic modulus 720 kg / cm 2 ) as the secondary material. Secondary molding was performed at 250 ° C, and as shown in Fig. 2, a composite molded product was created by melting and sandwiching the front and back surfaces of the bottom plate of the box-shaped primary molded product with almost equal thickness, and after the secondary molding. Characteristics such as warp deformation amount, appearance, bending resistance, and surface hardness were evaluated.
比較例１〜４ 実施例１〜３と同様の一次材料Ａ−１、Ａ−２、Ａ−
３を用いて図−１に示す箱型一次成形品（但し中央部に
貫通孔なし）を成形し、これを二次側成形用金型に装着
して、二次材料として前記Ｂ−１と同じ熱可塑性ポリエ
ステルエラストマーを用いて、図−３に示す如く、その
片側表面のみに二次材料を複合した成形品を作成し同様
の評価を行った（比較例１、２、３）。Comparative Examples 1 to 4 Primary Materials A-1, A-2, A-Similar to Examples 1 to 3
3 was used to mold a box-shaped primary molded product (with no through hole in the central part) shown in FIG. 1, and this was mounted on a secondary-side molding die, and the above-mentioned B-1 and B-1 were used as secondary materials. As shown in FIG. 3, the same thermoplastic polyester elastomer was used to prepare a molded article in which the secondary material was compounded only on one surface thereof, and the same evaluation was performed (Comparative Examples 1, 2, 3).
又、更に比較のため図−２に示す複合成型品と同形の
箱を一次材料を使用することなく二次材料（Ｂ−１）の
みで一回で成形したものも作成し（比較例４）評価し
た。Further, for comparison, a box of the same shape as the composite molded product shown in FIG. 2 was molded at once with only the secondary material (B-1) without using the primary material (Comparative Example 4). evaluated.
尚、評価方法として、外観は目視により二次成形面の
艶、変色等を目視により判定した。As an evaluation method, the appearance was visually evaluated for gloss, discoloration, and the like on the secondary molding surface.
又、最終成形品の屈曲抵抗は箱形成形品を伏せた状態
で定盤上におき、指圧を加えて底板部の屈曲抵抗を感触
によって判定した。The bending resistance of the final molded product was determined by touching the bending resistance of the bottom plate portion by placing finger pressure on the platen with the box-formed product lying down.
又、そり変形量は、成形品の底板部を三次元寸法測定
器を用いて、両端に対する中央部のへこみ量（mm）を測
定し、そり変形量とした。又、表面（二次側）硬度はシ
ョア硬度Ｄで示した。The amount of warp deformation was determined by measuring the amount of dents (mm) in the center of the bottom plate of the molded product using a three-dimensional dimension measuring device and measuring the amount of warp deformation. The surface (secondary side) hardness is indicated by Shore hardness D.
結果を併せて表−１に示す。 The results are also shown in Table-1.
実施例４、５ 一次材料として Ａ−4: ポリブチレンテレフタレート共重合体（融点185℃）に
ガラス繊維を５％配合した組成物（曲げ弾性率約32000k
g/cm2） Ａ−5: Ａ−４と同じポリブチレンテレフタレート共重合体にガ
ラス繊維20％及び、ガラスフレーク20％を配合した組成
物（曲げ弾性率約80000kg/cm2） を用いて図−４に示す如き、切欠きのある平板を成形し
た。この成形品を二次側成形用金型に装着して、 二次材料として Ｂ−2: ポリエステルエラストマー（融点198℃、曲げ弾性率110
0kg/cm2） を用いて二次側樹脂温度240℃にて図−５に示す如く、
表裏両面をほぼ対称的に融着した複合成形品を作成し、
前述とほぼ同様の評価を行った。 Examples 4 and 5 A-4: Polybutylene terephthalate copolymer (melting point 185 [deg.] C.) as a primary material A composition containing 5% of glass fiber (flexural modulus of about 32000 k)
g / cm 2 ) A-5: Using the same polybutylene terephthalate copolymer as A-4 with 20% glass fiber and 20% glass flake (bending elastic modulus about 80,000 kg / cm 2 ) -4, a flat plate having a notch was formed. This molded product was attached to a secondary side molding die, and as a secondary material, B-2: polyester elastomer (melting point 198 ° C, flexural modulus 110
0kg / cm 2 ) at the secondary side resin temperature of 240 ° C, as shown in Fig. 5,
Create a composite molded product that fuses the front and back sides almost symmetrically,
The evaluation similar to the above was performed.
比較例５〜７ 実施例４、５と同様の一次材料Ａ−４、Ａ−５を用い
て、図４に示す板状一次成形品（但し切欠きなし）を成
形し、これを二次成形用金型に装着して二次材料として
前記と同じ熱可塑性ポリエステルエラストマー（Ｂ−
２）を用いて図−６に示す如くその片側表面にのみ二次
材料を複合した成形品を作成し同様の評価を行った（比
較例５、６）。Comparative Examples 5 to 7 Using the same primary materials A-4 and A-5 as in Examples 4 and 5, a plate-shaped primary molded product (without cutout) shown in FIG. 4 was molded, and this was subjected to secondary molding. The same thermoplastic polyester elastomer (B-
As shown in FIG. 6 using 2), a molded article in which the secondary material was compounded only on one surface thereof was prepared and the same evaluation was performed (Comparative Examples 5 and 6).
又、更に比較のため、図−５に示す複合成形品と同形
の板状物を、一次材料を使用することなく、二次材料
（Ｂ−２）のみで一回で成形したものも作成し（比較例
７）評価した。Further, for comparison, a plate-shaped product having the same shape as the composite molded product shown in FIG. 5 was molded at once by using only the secondary material (B-2) without using the primary material. (Comparative example 7) It evaluated.
結果を併せて表−２に示す。 The results are also shown in Table-2.
尚、屈曲抵抗は手で湾曲し、その感触により評価し
た。The bending resistance was evaluated by the feeling of bending by hand.
図−１は本発明の実施例１、２、３に用いた一次成形品
の形状を示し、 図−２は本発明の複合成形品の形状構造を示し（実施例
１、２、３）、 図−３は本発明に属さない複合成形品の例を示し（比較
例１、２、３）、 図−４は本発明の実施例４、５に用いて一次成形品の形
状を示し、 図−５は本発明の複合成形品の形状構造を示し（実施例
４、５）、 図−６は本発明に属さない複合成形品の例を示し（比較
例５、６）、 夫々（ａ）は平面図、（ｂ）は（ａ）のＸ−Ｘ線断面
図、（ｃ）は底面図である。 1:一次成形品 2:二次成形部 3:一次成形品の貫通孔 4:二次成形品の切欠き部FIG. 1 shows the shape of the primary molded product used in Examples 1, 2 and 3 of the present invention, and FIG. 2 shows the shape structure of the composite molded product of the present invention (Examples 1, 2, 3), FIG. 3 shows an example of a composite molded article that does not belong to the present invention (Comparative Examples 1, 2, 3), and FIG. 4 shows the shape of a primary molded article used in Examples 4 and 5 of the present invention. -5 shows the shape structure of the composite molded article of the present invention (Examples 4 and 5), and FIG. 6 shows an example of the composite molded article not belonging to the present invention (Comparative Examples 5 and 6), respectively (a). Is a plan view, (b) is a sectional view taken along line XX of (a), and (c) is a bottom view. 1: Primary molded product 2: Secondary molded part 3: Through hole of primary molded product 4: Notched part of secondary molded product
Claims (7)
において、一次成形品として硬質熱可塑性ポリエステル
を主とする樹脂材料よりなる射出成形した基体成形品上
に、二次成形材料として軟質熱可塑性ポリエステルエラ
ストマーを主体とする樹脂材料を用いて二重成形又は二
色成形法により射出成形して複合成形するにあたり、一
次成形品の板状部の表裏両面を、ほぼ対称的に二次材料
にて融着被覆又は挟着するよう二次成形して一体化する
ことを特徴とする、そり変形が少なく、成形品自体は屈
曲抵抗を有し、その表面は柔軟性を持つ板状部を有する
複合成形品の製造法。1. In molding a plate-shaped or composite molded product including a plate-shaped portion, a secondary molding material is formed on a base molded product that is injection molded from a resin material mainly containing hard thermoplastic polyester as a primary molded product. As a composite molding by injection molding by a double molding or a two-color molding method using a resin material mainly composed of a soft thermoplastic polyester elastomer, the front and back surfaces of the plate-shaped part of the primary molded product are symmetrically divided into two parts. Secondary molding is performed so that it is fusion-coated or sandwiched with the next material and integrated, there is little warpage deformation, the molded product itself has bending resistance, and its surface is a flexible plate For manufacturing a composite molded article having parts.
ステルを主とする樹脂材料が、曲げ弾性率15000kg/cm2
以上である請求項１記載の複合成形品の製造法。2. A resin material mainly composed of hard thermoplastic polyester, which constitutes a primary molded article, has a flexural modulus of 15000 kg / cm 2.
The method for producing a composite molded article according to claim 1, which is the above.
ステルを主とする樹脂材料が、融点230℃以下である請
求項１又は２記載の複合成形品の製造法。3. The method for producing a composite molded article according to claim 1, wherein the resin material mainly composed of the hard thermoplastic polyester constituting the primary molded article has a melting point of 230 ° C. or lower.
ステルがポリアルキレンテレフタレート（アルキレン基
の炭素数２〜４）又はこれを主体とする共重合体又は混
合体である請求項１〜３の何れか１項記載の複合成形品
の製造法。4. The rigid thermoplastic polyester constituting the primary molded article is polyalkylene terephthalate (alkylene group having 2 to 4 carbon atoms) or a copolymer or mixture mainly containing it. A method for producing a composite molded article according to item 1.
料が無機充填剤を含有するポリエステル樹脂である請求
項１〜４の何れか１項記載の複合成形品の製造法。5. The method for producing a composite molded article according to claim 1, wherein the hard thermoplastic resin material constituting the primary molded article is a polyester resin containing an inorganic filler.
ーを主とする樹脂材料が、曲げ弾性率10000kg/cm2以下
である請求項１〜５の何れか１項記載の複合成形品の製
造法。6. The method for producing a composite molded article according to claim 1, wherein the resin material mainly composed of polyester elastomer used for the secondary molding has a flexural modulus of 10000 kg / cm 2 or less.
り成形した板状部を含む複合成形品。7. A composite molded article including a plate-shaped portion molded by the method according to claim 1.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2267308A JPH0813535B2 (en) | 1990-10-03 | 1990-10-03 | Plate-shaped composite molded article and manufacturing method thereof |
| PCT/JP1991/001339 WO1992005938A1 (en) | 1990-10-03 | 1991-10-03 | Plate-like composite molded product and method of molding |
| CA 2070290 CA2070290A1 (en) | 1990-10-03 | 1991-10-03 | Sheetlike composite molded article and process for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2267308A JPH0813535B2 (en) | 1990-10-03 | 1990-10-03 | Plate-shaped composite molded article and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04142935A JPH04142935A (en) | 1992-05-15 |
| JPH0813535B2 true JPH0813535B2 (en) | 1996-02-14 |
Family
ID=17443023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2267308A Expired - Fee Related JPH0813535B2 (en) | 1990-10-03 | 1990-10-03 | Plate-shaped composite molded article and manufacturing method thereof |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0813535B2 (en) |
| CA (1) | CA2070290A1 (en) |
| WO (1) | WO1992005938A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010103557A1 (en) | 2009-03-10 | 2010-09-16 | Meccanica Breganzese S.P.A. In Breve Mb S.P.A. | Device for rapid connection between the arm of an operating machine having an arm, in particular the arm of an excavator, and an item of equipment removably associated therewith, in particular a bucket and the like |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3325102B2 (en) * | 1993-12-17 | 2002-09-17 | ポリプラスチックス株式会社 | Polyester-based composite molded article and method for producing the same |
| JP3315570B2 (en) * | 1995-11-27 | 2002-08-19 | ポリプラスチックス株式会社 | Manufacturing method of polyester-based composite molded products |
| JPH10318268A (en) * | 1997-03-18 | 1998-12-02 | Nippon Seiko Kk | Seal for rolling bearing |
| GB2355116B (en) * | 1999-10-08 | 2003-10-08 | Nokia Mobile Phones Ltd | An antenna assembly and method of construction |
| JP5006672B2 (en) * | 2007-03-06 | 2012-08-22 | 株式会社ニコン | Outer shell part of electronic device, manufacturing method thereof, and electronic device provided with outer shell part |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5525057B2 (en) * | 1972-08-07 | 1980-07-03 | ||
| JPS5716317U (en) * | 1980-07-01 | 1982-01-27 | ||
| JPS6050127B2 (en) * | 1981-07-22 | 1985-11-07 | 宮川化成工業株式会社 | Method for manufacturing storage battery containers |
| FR2529507A1 (en) * | 1982-07-05 | 1984-01-06 | Cibie Projecteurs | METHOD FOR MANUFACTURING INJECTION-MOLDING SHAPED ARTICLE AND ARTICLE OBTAINED |
| JPS6471716A (en) * | 1987-09-11 | 1989-03-16 | Tokyo Electric Co Ltd | Two-material molding |
| JPH02184427A (en) * | 1989-01-11 | 1990-07-18 | Fuji Photo Film Co Ltd | Laminate |
-
1990
- 1990-10-03 JP JP2267308A patent/JPH0813535B2/en not_active Expired - Fee Related
-
1991
- 1991-10-03 CA CA 2070290 patent/CA2070290A1/en not_active Abandoned
- 1991-10-03 WO PCT/JP1991/001339 patent/WO1992005938A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010103557A1 (en) | 2009-03-10 | 2010-09-16 | Meccanica Breganzese S.P.A. In Breve Mb S.P.A. | Device for rapid connection between the arm of an operating machine having an arm, in particular the arm of an excavator, and an item of equipment removably associated therewith, in particular a bucket and the like |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1992005938A1 (en) | 1992-04-16 |
| JPH04142935A (en) | 1992-05-15 |
| CA2070290A1 (en) | 1992-04-04 |
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| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| LAPS | Cancellation because of no payment of annual fees |