JPH07292124A - Resin article and its production - Google Patents
Resin article and its productionInfo
- Publication number
- JPH07292124A JPH07292124A JP9101094A JP9101094A JPH07292124A JP H07292124 A JPH07292124 A JP H07292124A JP 9101094 A JP9101094 A JP 9101094A JP 9101094 A JP9101094 A JP 9101094A JP H07292124 A JPH07292124 A JP H07292124A
- Authority
- JP
- Japan
- Prior art keywords
- container
- polypropylene
- resin product
- acrylonitrile
- butadiene
- 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)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は部品の運搬等に用いられ
るコンテナーボックス等のヒンジ部を有する樹脂製品と
その製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin product having a hinge portion such as a container box used for transporting parts and the like and a method for producing the resin product.
【０００２】[0002]
【従来の技術】従来、部品の運搬等に用いられる折り畳
み式のコンテナーボックスの組成材料としては、ポリプ
ロピレンが用いられている。これは、ポリプロピレン
（以下「ＰＰ」とも称する。）が優れたヒンジ特性（３
０万回以上／at20℃）を有すること、耐油性、耐薬品性
に優れていること、汎用樹脂として比較的安価であるこ
となどの理由による。2. Description of the Related Art Conventionally, polypropylene has been used as a composition material of a foldable container box used for transportation of parts and the like. This is because polypropylene (hereinafter also referred to as “PP”) has excellent hinge characteristics (3
The reason is that it has more than 100,000 cycles / at 20 ° C.), has excellent oil resistance and chemical resistance, and is relatively inexpensive as a general-purpose resin.
【０００３】[0003]
【発明が解決しようとする課題】上述した従来のＰＰか
らなる折り畳み式コンテナーボックス等の容器にあって
は、ＰＰが高結晶樹脂であるため、成形時の収縮率が高
いので容器にヒケが発生したり、成形時の収縮の異方性
が高いので容器に反りが発生したり、溶融粘度が低く薄
肉容器の成形が困難であり、曲げモジュラス（曲げ弾性
率）が低いので剛性が低く、特にＰＰの容器を積み重ね
たときに底だれを生じる。そのため、軽量で、強度が要
求され、且つ積み重ね精度も要求される容器としては不
十分である。In the conventional container such as the foldable container box made of PP as described above, since PP is a high crystalline resin, the shrinkage rate at the time of molding is high, so that a sink mark occurs in the container. And the anisotropy of shrinkage during molding is high, warping occurs in the container, the melt viscosity is low and it is difficult to mold thin-walled containers, and the bending modulus (flexural elastic modulus) is low, so the rigidity is low, especially When the PP containers are stacked, bottom sagging occurs. Therefore, it is insufficient as a container that is lightweight, requires strength, and requires stacking accuracy.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決すべく本
発明による樹脂製品は、互いに相溶性のない曲げ弾性率
（曲げモジュラス）と流動性（ＭＩ）の異なる２種類の
樹脂を所定の割合で混合して成形した。ここで、２種類
の樹脂としては、例えばポリプロピレンとアクリロニト
リル・ブタジエン・スチレン共重合体（以下「ＡＢＳ」
とも称する。）、ポリプロピレンとアクリロニトリル・
エチレン・スチレン共重合体（以下「ＡＥＳ」とも称す
る。）、ポリプロピレンとナイロン（以下「ＰＡ」とも
称する。）などであり、所定の割合としては、例えば９
０：１０〜１０：９０（重量％）の割合である。In order to solve the above-mentioned problems, the resin product according to the present invention contains two kinds of resins having different bending elastic moduli (flexural modulus) and fluidity (MI) which are incompatible with each other at a predetermined ratio. Were mixed and molded. Here, as the two kinds of resins, for example, polypropylene and acrylonitrile-butadiene-styrene copolymer (hereinafter referred to as "ABS")
Also called. ), Polypropylene and acrylonitrile
An ethylene / styrene copolymer (hereinafter also referred to as “AES”), polypropylene and nylon (hereinafter also referred to as “PA”), and the like, and the predetermined ratio is, for example, 9
It is a ratio of 0:10 to 10:90 (% by weight).
【０００５】また、本発明によるヒンジ部を有する樹脂
製品の製造方法は、ポリプロピレンのパージ材とアクリ
ロニトリル・ブタジエン・スチレン共重合体のパージ材
等廃棄物を粉砕し、これら粉砕したパージ材等廃棄物を
少なくとも所定量混入して前記ポリプロピレンとアクリ
ロニトリル・ブタジエン・スチレン共重合体とが９０：
１０〜１０：９０（重量％）の割合になるように混合し
た後射出成形する。Further, the method for producing a resin product having a hinge portion according to the present invention is carried out by pulverizing waste materials such as polypropylene purge material and acrylonitrile-butadiene-styrene copolymer purge material, and pulverizing the pulverized waste materials such as purge material. Of polypropylene and acrylonitrile / butadiene / styrene copolymer in an amount of 90:
After mixing so as to have a ratio of 10 to 10:90 (% by weight), injection molding is performed.
【０００６】[0006]
【作用】互いに相溶性のない曲げ弾性率と流動性の異な
る２種類の樹脂を所定の割合で混合して成形することに
より、２種類の樹脂の特性を兼ね備えた樹脂製品が得ら
れ、例えばポリプロピレンとアクリロニトリル・ブタジ
エン・スチレン共重合体とを用いると、ポリプロピレン
の優れたヒンジ特性を有し、且つアクリロニトリル・ブ
タジエン・スチレン共重合体の剛性を有する樹脂製品が
得られる。また、ポリプロピレンのパージ材等廃棄物と
アクリロニトリル・ブタジエン・スチレン共重合体のパ
ージ材等廃棄物を用いてこれらを所定の割合で混入混合
して射出成形して樹脂製品を成形することにより、上記
のような優れたヒンジ特性を有し、且つ剛性を有する樹
脂製品を成形することができ、パージ材等廃棄物の再利
用が可能になって省資源化を図れる。By mixing and molding two kinds of resins which are incompatible with each other and different in flexural modulus and fluidity at a predetermined ratio, a resin product having the characteristics of the two kinds of resins can be obtained. And acrylonitrile-butadiene-styrene copolymer, a resin product having the excellent hinge properties of polypropylene and the rigidity of acrylonitrile-butadiene-styrene copolymer can be obtained. Further, by using a waste material such as a polypropylene purging material and a waste material such as an acrylonitrile-butadiene-styrene copolymer purging material, and mixing them in a predetermined ratio and injection-molding the resin product, It is possible to mold a resin product having excellent hinge characteristics and rigidity as described above, and it is possible to reuse waste such as a purge material and save resources.
【０００７】[0007]
【実施例】以下に本発明の実施例を添付図面に基づいて
説明する。ここで、図１は本発明を適用した容器の組み
立て前の状態の斜視図、図２は同容器の組み立て後の状
態の斜視図、図３は同容器の模式的要部拡大断面図であ
る。Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a perspective view of a container to which the present invention is applied before being assembled, FIG. 2 is a perspective view of the container after assembling, and FIG. 3 is a schematic enlarged cross-sectional view of essential parts of the container. .
【０００８】容器１は、四角形の底板部２の四辺にそれ
ぞれ折曲げ可能な４枚の枠板部３が一体成形され、各枠
板部３の両端部にはそれぞれ相手方となる枠板部３と嵌
合するための係合凹部３ａと係合凸部３ｂとが設けら
れ、各枠板部３を図１の矢印方向に折曲げて、係合凹部
３ａと係合凸部３ｂとを係合させることにより図２に示
すような箱状容器１が形成される。底板部２と各枠板部
３との折曲部がヒンジ部２ａとなる。In the container 1, four foldable frame plate portions 3 are integrally formed on the four sides of a quadrangular bottom plate portion 2, and opposite frame plate portions 3 are formed at both ends of each frame plate portion 3. An engaging concave portion 3a and an engaging convex portion 3b for fitting are provided, and each frame plate portion 3 is bent in the direction of the arrow in FIG. 1 to engage the engaging concave portion 3a and the engaging convex portion 3b. By combining them, the box-shaped container 1 as shown in FIG. 2 is formed. A bent portion between the bottom plate portion 2 and each frame plate portion 3 serves as a hinge portion 2a.
【０００９】この容器１は、互いに相溶性のない曲げ弾
性率と流動性の異なる２種類の樹脂を所定の割合で混合
して成形されている。その成形過程は、例えばＰＰ（Ｍ
Ｉ＝６〜１０）とＡＢＳ（ＭＩ＝１６〜２０）とを用
い、ＰＰとＡＢＳとを９０：１０〜１０：９０（重量
％）の割合で計量して、タンブラーでＰＰとＡＢＳとを
混合した後、インジェクション成形機によって射出成形
する。尚、ＭＩは、ＡＳＴＭ１２３８で定められた試験
法であって、樹脂の流れを代表する数値であり、単位は
「g/10min」である。The container 1 is formed by mixing two kinds of resins, which are incompatible with each other and have different flexural modulus and fluidity, at a predetermined ratio. The molding process is, for example, PP (M
I = 6 to 10) and ABS (MI = 16 to 20), PP and ABS are weighed at a ratio of 90:10 to 10:90 (% by weight), and PP and ABS are mixed with a tumbler. After that, injection molding is performed by an injection molding machine. Incidentally, MI is a test method defined by ASTM1238, is a numerical value representing the flow of resin, and the unit is "g / 10 min".
【００１０】ここで、ＰＰの割合が１０重量％未満にな
るとＰＰの有する優れたヒンジ特性が低下し、９０重量
％を越えるとＡＢＳの剛性が得られなくなるなるので、
これらの範囲内で混合することが好ましい。また、ＰＰ
としては、例えば「ＥＰＡ２」（三井東圧社製、曲げ弾
性率１２９００kg／cm2）、ＡＢＳとしては、例えば
「１０ＪＫ２」（日本ＪＳＲ社製、 曲げ弾性率２１０
００kg／cm2）を用いることができる。Here, if the proportion of PP is less than 10% by weight, the excellent hinge characteristics of PP deteriorate, and if it exceeds 90% by weight, the ABS rigidity cannot be obtained.
Mixing within these ranges is preferred. Also, PP
For example, "EPA2" (manufactured by Mitsui Toatsu Co., Ltd., flexural modulus 12900 kg / cm 2 ) and ABS, for example, "10JK2" (manufactured by Japan JSR, flexural modulus 210)
00 kg / cm 2 ) can be used.
【００１１】このようにＰＰとＡＢＳとを所定の割合で
混合して射出成形した場合、互いに相溶性がなく、また
流動性の違いによって、完全に混合することがなく、図
３に示すようにＰＰ４がＡＢＳ５に層状に分布する。
尚、同図は、流動性が６〜１０のＰＰと１７〜２０のＡ
ＢＳとを混合した場合の模式的断面である。Thus, when PP and ABS are mixed at a predetermined ratio and injection-molded, they are incompatible with each other, and due to the difference in fluidity, they are not completely mixed, and as shown in FIG. PP4 is distributed in layers on ABS5.
In the figure, the flowability is 6-10 PP and 17-20 A.
It is a schematic cross section at the time of mixing with BS.
【００１２】これにより、ＰＰの優れたヒンジ特性を有
し、且つＡＢＳの剛性を併せ持った容器１が得られ、特
に容器１のようなヒンジ部を有する容器に剛性を持たせ
ることができ、大型で薄肉の容器を得ることができる。As a result, the container 1 having the excellent hinge characteristic of PP and the rigidity of ABS can be obtained. In particular, a container having a hinge portion such as the container 1 can be made to have rigidity, and it is large in size. It is possible to obtain a thin container.
【００１３】この場合、上記のようにＰＰとＡＢＳとを
予め購入して用いることもできるが、生産工程では、種
々のパージ材、例えば色替えによるパージ材、材料替え
よるパージ材、成形立上げ時のパージ材や成形不良品ま
たは成形時のランナー、スプルーなどの廃棄物が発生す
る。例えばＰＰからＡＢＳに材料を替えた場合、ＰＰと
ＡＢＳとが混合した団子状のパージ材が発生する。In this case, although PP and ABS can be purchased and used in advance as described above, in the production process, various purging materials such as purging materials by color change, purging materials by material change, and molding start-up. Waste materials such as purging material, defective products or runners and sprues during molding are generated. For example, when the material is changed from PP to ABS, dumpling-like purge material in which PP and ABS are mixed is generated.
【００１４】そこで、インジェクション成形工程で発生
するパージ材等廃棄物を用いて、予め使用したＰＰ、Ａ
ＢＳの使用量を計測しておき、ＰＰのパージ材等廃棄
物、ＡＢＳのパージ材等廃棄物或いはＰＰ及びＡＢＳを
含むパージ材等廃棄物を粗粉砕し、ＰＰとＡＢＳとの割
合が所定の割合になるように混入して、タンブラーで混
合した後インジェクション成形機で成形する。Therefore, by using waste materials such as a purge material generated in the injection molding process, PP and A used in advance are used.
The amount of BS used is measured, and waste such as PP purge material and the like, ABS purge material and other waste or purge material and the like containing PP and ABS are roughly crushed, and the ratio of PP and ABS is set to a predetermined value. It is mixed in a ratio so that it is mixed with a tumbler and then molded by an injection molding machine.
【００１５】このようにパージ材等廃棄物を利用して容
器を成形することによって、パージ材等廃棄物の再利用
が可能になる。特に、部品等のワーク運搬搬送用の折り
畳み式コンテナーボックス等の外観が要求されない容器
を製造するにはこのような方法で充分である。By thus forming the container using the waste material such as the purge material, the waste material such as the purge material can be reused. In particular, such a method is sufficient for producing a container such as a foldable container box for transporting and transporting works such as parts which does not require an external appearance.
【００１６】尚、上記実施例では容器の製造について説
明したが、これに限定されるものではなく、例えば書類
綴じ用のファイル等ヒンジ部を有し、且つ所定の剛性が
要求される樹脂製品に対して同様に適用できる。また、
上記実施例では、互いに相溶性のない曲げ弾性率と流動
性の異なる２種類の樹脂として、ＰＰとＡＢＳとを用い
た例について説明したが、この他、ＰＰとＡＥＳ、ＰＰ
とＰＡとの組合わせなどでも同様の作用効果を得ること
ができる。In the above embodiments, the manufacturing of the container has been described, but the present invention is not limited to this. For example, a resin product having a hinge portion such as a file for binding documents and requiring a predetermined rigidity is used. The same applies to the same. Also,
In the above-described embodiment, an example in which PP and ABS are used as two types of resins having incompatible flexural modulus and fluidity different from each other has been described, but PP, AES and PP are also used.
Similar effects can also be obtained by combining and PA.
【００１７】[0017]
【発明の効果】以上に説明したように本発明に係る樹脂
製品は、互いに相溶性のない曲げ弾性率と流動性の異な
る２種類の樹脂を所定の割合で混合して成形したので、
２種類の樹脂の特性を兼ね備えたものが得られ、例えば
ポリプロピレンとアクリロニトリル・ブタジエン・スチ
レン共重合体とを用いることによってポリプロピレンの
優れたヒンジ特性を有し、且つアクリロニトリル・ブタ
ジエン・スチレン共重合体の剛性を有する樹脂製品が得
られる。これにより、例えば軽量で強度が要求され、且
つ積み重ね精度も要求される容器、例えば折り畳み式容
器を大型サイズにしても底だれ等を生じることがなくな
る。As described above, the resin product according to the present invention is formed by mixing two kinds of resins which are incompatible with each other and have different flexural modulus and fluidity at a predetermined ratio.
A resin having the properties of two kinds of resins is obtained. For example, by using polypropylene and acrylonitrile-butadiene-styrene copolymer, the excellent hinge properties of polypropylene and the acrylonitrile-butadiene-styrene copolymer can be obtained. A resin product having rigidity can be obtained. As a result, even if a container that is lightweight and requires strength and stacking accuracy, such as a foldable container, has a large size, bottom sagging does not occur.
【００１８】また、本発明に係る樹脂製品の製造方法に
よれば、ポリプロピレンのパージ材等廃棄物とアクリロ
ニトリル・ブタジエン・スチレン共重合体のパージ材等
廃棄物を用いてこれらを所定の割合で混入混合して射出
成形して樹脂製品を成形するようにしたので、生産工程
で発生するパージ材等廃棄物を利用して優れたヒンジ特
性を有し、且つ剛性を有する樹脂製品を成形することが
でき、パージ材等廃棄物の再利用が可能になって省資源
化を図ることができ、廃棄物の処理コストも低減でき
る。Further, according to the method for producing a resin product of the present invention, wastes such as polypropylene purging material and wastes such as acrylonitrile-butadiene-styrene copolymer purging material are used and mixed at a predetermined ratio. Since the resin product is molded by mixing and injection molding, it is possible to mold a resin product having excellent hinge characteristics and rigidity by using waste such as purge material generated in the production process. As a result, waste such as purge material can be reused, resource saving can be achieved, and waste disposal cost can be reduced.
【図１】本発明を適用した容器の組み立て前の状態の斜
視図FIG. 1 is a perspective view of a container to which the present invention is applied before being assembled.
【図２】同容器の組み立て後の状態の斜視図FIG. 2 is a perspective view of the container after assembly.
【図３】同容器の模式的要部拡大断面図FIG. 3 is a schematic enlarged cross-sectional view of the main part of the container.
１…容器、２…底板部、２ａ…ヒンジ部、３…枠板部、
３ａ…係合凹部、３ｂ…係合凸部、４…ポリプロピレン
（ＰＰ）、５…アクリロニトリル・ブタジエン・スチレ
ン共重合体（ＡＢＳ）。1 ... Container, 2 ... Bottom plate part, 2a ... Hinge part, 3 ... Frame plate part,
3a ... Engagement concave portion, 3b ... Engagement convex portion, 4 ... Polypropylene (PP), 5 ... Acrylonitrile-butadiene-styrene copolymer (ABS).
───────────────────────────────────────────────────── 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 31:00 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location B29L 31:00
Claims (3)
の製品は互いに相溶性がなく且つ曲げ弾性率と流動性が
異なる２種類の樹脂を所定の割合で混合して成形したこ
とを特徴とする樹脂製品。1. A resin product having a hinge portion, characterized in that the product is formed by mixing two kinds of resins which are incompatible with each other and have different flexural modulus and fluidity at a predetermined ratio. Product.
リプロピレンとアクリロニトリル・ブタジエン・スチレ
ン共重合体とを９０：１０〜１０：９０（重量％）の割
合で混合したことを特徴とする樹脂製品。2. The resin product according to claim 1, wherein polypropylene and acrylonitrile / butadiene / styrene copolymer are mixed in a ratio of 90:10 to 10:90 (% by weight). .
リル・ブタジエン・スチレン共重合体のパージ材等廃棄
物を粉砕し、少なくともこれら粉砕したパージ材等廃棄
物を混入して前記ポリプロピレンとアクリロニトリル・
ブタジエン・スチレン共重合体とが９０：１０〜１０：
９０（重量％）の割合になるように混合した後にヒンジ
部を有する樹脂製品を射出成形することを特徴とする樹
脂製品の製造方法。3. A polypropylene or / and an acrylonitrile / butadiene / styrene copolymer waste such as a purge material is crushed, and at least these crushed wastes such as a purge material are mixed and the polypropylene and acrylonitrile /
90:10 to 10: 9 with butadiene-styrene copolymer.
A method for producing a resin product, which comprises mixing the resin product at a ratio of 90 (% by weight) and then injection-molding the resin product having a hinge portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9101094A JPH07292124A (en) | 1994-04-28 | 1994-04-28 | Resin article and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9101094A JPH07292124A (en) | 1994-04-28 | 1994-04-28 | Resin article and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07292124A true JPH07292124A (en) | 1995-11-07 |
Family
ID=14014563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9101094A Pending JPH07292124A (en) | 1994-04-28 | 1994-04-28 | Resin article and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07292124A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787573A (en) * | 2012-08-23 | 2012-11-21 | 浙江浙牌科技有限公司 | High-strength anti-collision reflective guardrail |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0356238A (en) * | 1989-07-25 | 1991-03-11 | Showa Denko Kk | Synthetic resin product with hinge |
-
1994
- 1994-04-28 JP JP9101094A patent/JPH07292124A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0356238A (en) * | 1989-07-25 | 1991-03-11 | Showa Denko Kk | Synthetic resin product with hinge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787573A (en) * | 2012-08-23 | 2012-11-21 | 浙江浙牌科技有限公司 | High-strength anti-collision reflective guardrail |
| CN102787573B (en) * | 2012-08-23 | 2014-12-31 | 浙江浙牌科技有限公司 | High-strength anti-collision reflective guardrail |
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