JPH0635522B2 - Molding resin composition - Google Patents
Molding resin compositionInfo
- Publication number
- JPH0635522B2 JPH0635522B2 JP17268885A JP17268885A JPH0635522B2 JP H0635522 B2 JPH0635522 B2 JP H0635522B2 JP 17268885 A JP17268885 A JP 17268885A JP 17268885 A JP17268885 A JP 17268885A JP H0635522 B2 JPH0635522 B2 JP H0635522B2
- Authority
- JP
- Japan
- Prior art keywords
- molding
- vinyl acetate
- parts
- molded product
- weight
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、ポリオレフィン系樹脂成形物の回収品を再使
用した成形用樹脂組成物に関するものである。TECHNICAL FIELD The present invention relates to a molding resin composition in which a recovered product of a polyolefin resin molding is reused.
従来の技術 ポリエチレン、ポリプロピレンなどのポリオレフィンを
使用して、ポリバケツ、コンテナ、パレット、容器など
の成形物が大量に製造されている。2. Description of the Related Art Polyolefins such as polyethylene and polypropylene are used in large quantities to manufacture molded articles such as poly buckets, containers, pallets, and containers.
省資源のためには、故紙再生、古金属再利用と同様に、
使用後の上記成形物を回収して再度成形に供することが
望ましい。In order to save resources, just like recycling waste paper and recycling old metals,
It is desirable that the above-mentioned molded product after use be recovered and subjected to molding again.
従来、射出成形時に副生するスプール、ランナー、ブロ
ー成形・真空成形時に発生するカットバリ、フィルム・
シート成形時の耳端部、そのほか成形始動時に発生する
規格外品などの未使用品については、これを成形工場に
おいて粉砕し、新しいポリオレフィン系樹脂に適当量配
合して再使用することが場合によりなされているが、需
要者が使用した後の成形物については焼却その他の手段
により廃棄するのが通常であった。Conventionally, spools, runners produced by injection molding, cut burrs generated during blow molding / vacuum molding, films, etc.
In case of unused parts such as edge parts at the time of sheet molding and other non-standard products generated at the time of molding start, it may be crushed at the molding plant, blended with a new polyolefin resin in an appropriate amount and reused. Although it has been done, it was usual to discard the molded product after it was used by the consumer by incineration or other means.
発明が解決しょうとする問題点 本発明者らは、需要者が使用した後の成形物について
も、これを回収して再利用することを試みたが、回収品
は成形時の熱履歴だけでなく、可視光線、赤外線、紫外
線に曝されたり雨水によって侵蝕されているため劣化が
著しく（分子構造的には分子の切断、二重結合の発生等
が生じている）、その結果、回収品を粉砕して再び溶融
成形に供しても機械的強度の不足が目立ち、到底実用に
耐えうる成形物を得ることはできなかった。また、これ
らの回収品を新しいポリオレフィン系樹脂に配合しよう
としても、その配合量を多くすることはできず、また溶
融時の流動性が悪いため成形性が劣り、たとえ成形はで
きても成形物の引張強度、衝撃強度などの機械的物性や
外観が劣り、耐久性や美観を要求されないごく限られた
用途にしか使用しえなかった。Problems to be Solved by the Invention The present inventors have tried to recover and reuse the molded product after being used by the consumer, but the recovered product is only the thermal history at the time of molding. However, deterioration due to exposure to visible light, infrared rays, ultraviolet rays, and corrosion by rainwater is significant (molecular breakage, double bond generation, etc. occur). Even when pulverized and subjected to melt molding again, insufficient mechanical strength was conspicuous, and it was impossible to obtain a molded article that could withstand practical use. Moreover, even if it is attempted to compound these recovered products with a new polyolefin resin, the compounding amount cannot be increased, and the moldability is poor due to poor fluidity during melting. It was inferior in mechanical properties such as tensile strength and impact strength, and in appearance, and could only be used in very limited applications where durability and aesthetics were not required.
本発明は、このような状況に鑑み、たとえ使用済の成形
物であっても、これから使用に耐えうる成形物を製造で
きる技術を見出すべくなされたものである。In view of such a situation, the present invention has been made to find a technique capable of producing a molded product that can be used even if it is a used molded product.
問題点を解決するための手段 本発明の成形用樹脂組成物は、ポリオレフィン系樹脂成
形物回収品の粉砕物（Ａ）100重量部に、酢酸ビニル含
有量50〜80重量％、メルトインデックス0.5g/10min以上
のエチレン−酢酸ビニル共重合体（Ｂ）0.5〜50重量部
を配合してなるものである。MEANS FOR SOLVING THE PROBLEMS The molding resin composition of the present invention has a vinyl acetate content of 50 to 80% by weight and a melt index of 0.5 g per 100 parts by weight of a pulverized product (A) of a recovered polyolefin resin molded product. / 10 min or more of 0.5 to 50 parts by weight of the ethylene-vinyl acetate copolymer (B).
以下、本発明を詳細に説明する。Hereinafter, the present invention will be described in detail.
ポリオレフィン系樹脂成形物回収品の粉砕物（Ａ）とし
ては、低・中・高密度ポリエチレン、リニアー低密度ポ
リエチレン、エチレン−不飽和カルボン酸（またはその
エステル、無水物）共重合体（グラフト共重合体を含
む）、アイオノマー、エチレン含量の高いエチレン−酢
酸ビニル共重合体またはそのケン化物、エチレン−プロ
ピレン共重合体、エチレン−プロピレン−ジエン共重合
体、エチレンと炭素数４以上のα−オレフィンとの共重
合体、ポリプロピレン、ポリブテン、ポリペンテンなど
のポリオレフィン系樹脂から成形された成形物の回収品
を粉砕したものが用いられる。As the pulverized product (A) of the recovered polyolefin resin molded product, low / medium / high density polyethylene, linear low density polyethylene, ethylene-unsaturated carboxylic acid (or its ester, anhydride) copolymer (graft copolymer (Including a polymer), an ionomer, an ethylene-vinyl acetate copolymer having a high ethylene content or a saponified product thereof, an ethylene-propylene copolymer, an ethylene-propylene-diene copolymer, ethylene and an α-olefin having 4 or more carbon atoms. A crushed product of a recovered product of a molded product molded from a polyolefin resin such as the copolymer, polypropylene, polybutene, or polypentene.
この場合、ポリオレフィン系樹脂を主体とするものであ
れば、他の樹脂、たとえば、ポリアミド系樹脂、ポリエ
ステル系樹脂、スチレン系樹脂（アクリロニトリル−ス
チレン共重合体、スチレン−ブタジエン共重合体、ＡＢ
Ｓ樹脂、ＭＢＳ樹脂を含む）、塩化ビニル系樹脂、酢酸
ビニル系樹脂、ポリアセタール、ポリカーボネート、ポ
リメタクリル酸メチル、ビニルアルコール系樹脂などを
少量（たとえばポリオレフィン系樹脂に対し20重量％程
度以下）含んでいても差支えはない。また、フィラー、
補強繊維類、安定剤、可塑剤、発泡剤、着色剤、滑剤な
どの添加物を含んでいても差支えない。In this case, other resins such as polyamide resins, polyester resins, styrene resins (acrylonitrile-styrene copolymers, styrene-butadiene copolymers, AB, etc.) can be used as long as they are mainly composed of polyolefin resins.
S resin, including MBS resin), vinyl chloride resin, vinyl acetate resin, polyacetal, polycarbonate, polymethylmethacrylate, vinyl alcohol resin, etc. in a small amount (for example, about 20% by weight or less relative to the polyolefin resin) It doesn't matter. Also, a filler,
Additives such as reinforcing fibers, stabilizers, plasticizers, foaming agents, colorants and lubricants may be included.
成形物とは、射出成形物、押出成形物、圧縮成形物、回
転成形物など任意である。The molded product may be an injection molded product, an extrusion molded product, a compression molded product, a rotational molded product, or the like.
成形物の回収品とは、成形物製造工程で発生するスプー
ル、ランナー、バリ、耳端部、規格外品など未使用の成
形物も用いられるが、需要者において使用した後の使用
済品であっても使用できるところが、本発明のすぐれた
点である。Unused molded products such as spools, runners, burrs, ears, and nonstandard products generated in the molded product manufacturing process are used as recovered products of molded products, but they are used products after being used by consumers. The advantage of the present invention is that it can be used even if it exists.
また、上記のようにポリオレフィン系樹脂は他の樹脂を
含んでいても差支えないので、ポリフィン系樹脂を他の
樹脂と混合して成形したり、他の樹脂の層との積層物の
形態で成形したものであっても、本発明においてはその
回収品を粉砕して使用することができる。Further, as mentioned above, the polyolefin-based resin may include other resins, so that the resin may be molded by mixing the polyfin-based resin with the other resin or in the form of a laminate with a layer of the other resin. In the present invention, the recovered product can be crushed and used.
上記ポリオレフィン系樹脂成形物回収品を適当な粒度に
まで粉砕して粉砕物（Ａ）を得、これに次に述べるエチ
レン−酢酸ビニル共重合体（Ｂ）を配合する。The recovered polyolefin resin molded product is pulverized to an appropriate particle size to obtain a pulverized product (A), and the ethylene-vinyl acetate copolymer (B) described below is added to the pulverized product (A).
エチレン−酢酸ビニル共重合体（Ｂ）としては、酢酸ビ
ニル含有量50〜80重量％、メルトインデックス0.5g/10m
in以上のエチレン−酢酸ビニル共重合体が用いられる。The ethylene-vinyl acetate copolymer (B) has a vinyl acetate content of 50 to 80% by weight and a melt index of 0.5 g / 10 m.
An ethylene-vinyl acetate copolymer having a molecular weight of in or more is used.
酢酸ビニル含有量が50重量％未満では上記ポリオレフィ
ン系樹脂成形物回収品の粉砕物（Ａ）との相溶性が劣
り、その結果成形性が低下するのみならず、得られる成
形品の機械的強度が劣り、一方、酢酸ビニル含有量が80
重量％を越えると、ブロッキングしやすく成形性も悪
い。If the vinyl acetate content is less than 50% by weight, the compatibility with the pulverized product (A) of the above-mentioned polyolefin resin molded product recovered is poor, and as a result not only the moldability decreases, but also the mechanical strength of the obtained molded product. Is inferior, while the vinyl acetate content is 80
If the content exceeds 10% by weight, blocking tends to occur and moldability is poor.
また、メルトインデックスが0.5g/10min未満では、溶融
時の流動性が低下するので、やはり本発明の目的には不
適である。なお、メルトインデックスとは、190℃にお
ける荷重2160ｇでの溶融指数(g/10min)を言うものとす
る。Further, when the melt index is less than 0.5 g / 10 min, the fluidity at the time of melting is lowered, and thus it is also unsuitable for the purpose of the present invention. The melt index means the melt index (g / 10 min) at a load of 2160 g at 190 ° C.
エチレン−酢酸ビニル共重合体（Ｂ）は、無水のものを
用いてもよいが、含水率が最高15重量％程度以下の水湿
潤したエチレン−酢酸ビニル共重合体を用いることもで
きる。As the ethylene-vinyl acetate copolymer (B), an anhydrous one may be used, but a water-moistened ethylene-vinyl acetate copolymer having a maximum water content of about 15% by weight or less can also be used.
ポリオレフィン系樹脂成形物回収品の粉砕物（Ａ）に対
する上記エチレン−酢酸ビニル共重合体（Ｂ）の配合割
合は、回収品粉砕物（Ａ）100重量部に対し0.5〜50重量
部の範囲から選択する。（Ｂ）の配合割合が0.5重量部
未満では溶融時の流動性改善効果が不足し、一方（Ｂ）
の配合割合が50重量部を越えると相溶性が低下し、円滑
な成形ができなくなる。特に好ましい（Ｂ）の配合割合
は、１〜30重量部である。The mixing ratio of the above ethylene-vinyl acetate copolymer (B) to the pulverized product (A) of the recovered polyolefin resin molded product is from 0.5 to 50 parts by weight based on 100 parts by weight of the pulverized product (A) of the recovered product. select. If the blending ratio of (B) is less than 0.5 part by weight, the effect of improving the fluidity during melting is insufficient, while (B)
If the blending ratio exceeds 50 parts by weight, the compatibility decreases and smooth molding cannot be performed. A particularly preferable mixing ratio of (B) is 1 to 30 parts by weight.
ポリオレフィン系樹脂成形物回収品の粉砕物（Ａ）に対
するエチレン−酢酸ビニル共重合体（Ｂ）の配合は、
（Ａ）に直接（Ｂ）を配合してもよいが、（Ｂ）を一旦
新しいポリオレフィン系樹脂（Ｃ）に配合して溶融混合
することによりペレット状または粒子状のマスターバッ
チを得、このマスターバッチを（Ａ）と配合してから溶
融成形に供する方が、成形が円滑にできるので好まし
い。マスターバッチを製造する場合、（Ｃ）と（Ｂ）の
配合割合は、（Ｃ）100重量部に対し（Ｂ）を２〜100重
量部、特に５〜60重量部とすることが望ましい。Blending of the ethylene-vinyl acetate copolymer (B) with the pulverized product (A) of the recovered polyolefin resin molded product is
Although (B) may be directly blended with (A), pelletized or particulate master batch is obtained by blending (B) with a new polyolefin-based resin (C) and melt-mixing. It is preferable to blend the batch with (A) and then subject it to melt molding, since molding can be carried out smoothly. When producing a masterbatch, the blending ratio of (C) and (B) is preferably 2 to 100 parts by weight, and particularly 5 to 60 parts by weight with respect to 100 parts by weight of (C).
本発明の成形用樹脂組成物は、射出成形、押出成形、圧
縮成形、回転成形などの溶融成形に供され、種々の成形
物を製造することができる。The molding resin composition of the present invention is subjected to melt molding such as injection molding, extrusion molding, compression molding, rotational molding and the like to produce various molded products.
作用 本発明においてエチレン−酢酸ビニル共重合体（Ｂ）
は、これをポリオレフィン系樹脂成形物回収品の粉砕物
（Ａ）に配合することにより、溶融成形を円滑にすると
共に、得られる成形物の機械的強度や外観を保持させる
作用を示す。Action In the present invention, ethylene-vinyl acetate copolymer (B)
By blending this with the pulverized product (A) of the recovered polyolefin resin molded product, it has the effect of facilitating melt molding and maintaining the mechanical strength and appearance of the resulting molded product.
実施例 次に実施例をあげて、本発明をさらに説明する。以下
「部」、「％」とあるのは重量基準で表わしたものであ
る。なお、ポリプロピレンのメルトインデックスとは、
230℃における荷重2160ｇでの溶融指数(g/10min)を言
う。EXAMPLES Next, the present invention will be further described with reference to Examples. Hereinafter, "part" and "%" are expressed on a weight basis. In addition, with the melt index of polypropylene,
The melting index (g / 10min) at 230 ° C under a load of 2160g.
実施例１ 使用済のポリプロピレン製パレットおよびコンテナを粉
砕して、粒径５mm以下の回収品粉砕物（Ａ）を得た。Example 1 Used polypropylene pallets and containers were crushed to obtain a crushed product (A) having a particle size of 5 mm or less.
一方、メルトインデックス（230℃、2160ｇ）13g/10mi
n、粒径300μ以下の新しいポリプロピレン（Ｃ）粉末70
部と、酢酸ビニル含有量68.3％、メルトインデックス35
g/10min、含水率10％、粒径600μ以下のエチレン−酢酸
ビニル共重合体（Ｂ）粉末30部とを、ヘンシェルミキサ
ーにて予備混合した後ベント付き押出機に供給して、バ
レル最高温度240℃にて溶融混合し、含水率0.1％以下の
マスターバッチペレットを得た。On the other hand, melt index (230 ℃, 2160g) 13g / 10mi
n, a new polypropylene (C) powder 70 with a particle size of 300μ or less
Parts, vinyl acetate content 68.3%, melt index 35
g / 10 min, water content 10%, 30 parts of ethylene-vinyl acetate copolymer (B) powder having a particle size of 600μ or less are premixed with a Henschel mixer and then fed to a vented extruder to obtain the maximum barrel temperature. The mixture was melt-mixed at 240 ° C. to obtain a masterbatch pellet having a water content of 0.1% or less.
次に、上記回収品粉砕物（Ａ）70部と上記で得たマスタ
ーバッチペレット30部とを予備混合した後、30mm径の押
出成形機に供給し、下記条件で押出して、ペレット化し
た。Next, 70 parts of the recovered pulverized product (A) and 30 parts of the masterbatch pellets obtained above were premixed, then fed to an extruder having a diameter of 30 mm and extruded under the following conditions to be pelletized.
シリンダー温度 Ｃ１ 160℃ Ｃ２ 240℃ ダイ温度 Ｄ 230℃ 次にこのペレットを射出成形機に供給して、下記条件で
試験片を成形した。成形は円滑であり、得られた試験片
の外観も良好であった。Cylinder temperature C 1 160 ° C. C 2 240 ° C. Die temperature D 230 ° C. Next, the pellets were supplied to an injection molding machine, and test pieces were molded under the following conditions. The molding was smooth, and the appearance of the obtained test piece was good.
シリンダー温度 Ｃ１ 220℃ Ｃ２ 250℃ ダイ温度 Ｄ 240℃ 金型温度 30℃ 成形サイクル 80秒 このようにして得られた試験片の物性を、伸びについて
はASTM D 638（20℃）に従い、アイゾット衝撃強度につ
いてはASTM D 256（ノッチ付き、20℃）に従って測定し
た。結果は次の通りであった。Cylinder temperature C 1 220 ℃ C 2 250 ℃ Die temperature D 240 ℃ Mold temperature 30 ℃ Molding cycle 80 seconds The physical properties of the test piece thus obtained are measured according to ASTM D 638 (20 ℃) The impact strength was measured according to ASTM D 256 (notched, 20 ° C). The results were as follows.
伸び 400％以上 アイゾット衝撃強度 6.5 kg・cm/cm2 なお、上記ペレットを用いてメルトインデックスを230
℃、2160ｇの荷重条件下で測定したときの結果は、0.4g
/10minであった。Elongation 400% or more Izod impact strength 6.5 kg ・ cm / cm 2 In addition, the melt index is 230
When measured under load conditions of ℃ and 2160g, 0.4g
It was / 10 min.
比較例１ 実施例１における粉砕物（Ａ）を射出成形機に供給し、
実施例１の場合と同様の条件で成形しようとしたが、樹
脂の流動性が不良で、満足な成形物が得られなかった。
なお、メルトインデックス（230℃、2160ｇ）は0.1g/10
min以下であった。Comparative Example 1 The pulverized product (A) of Example 1 was supplied to an injection molding machine,
An attempt was made to mold under the same conditions as in Example 1, but the fluidity of the resin was poor, and a satisfactory molded product could not be obtained.
The melt index (230 ℃, 2160g) is 0.1g / 10
It was less than min.
比較例２ 実施例１における粉砕物（Ａ）を、メルトインデックス
（230℃、2160ｇ）13g/10min、粒径300μ以下の新しい
ポリプロピレン（Ｃ）粉末に混合して実施例１と同様の
条件でペレット化および射出成形することを試みたが、
（Ａ）：（Ｃ）の配合割合が60：40、40：60、30：70で
はいずれの場合も、射出成形自体は可能であるものの、
成形品にはショートショット、極度のフローマーク、シ
ルバーマークの発生があり、満足な成形品が得難かっ
た。Comparative Example 2 The pulverized product (A) in Example 1 was mixed with a new polypropylene (C) powder having a melt index (230 ° C., 2160 g) of 13 g / 10 min and a particle size of 300 μ or less, and pelletized under the same conditions as in Example 1. I tried to mold and injection molding,
In any of the cases where the mixing ratio of (A) :( C) is 60:40, 40:60, 30:70, injection molding itself is possible,
It was difficult to obtain a satisfactory molded product because the molded product had short shots, excessive flow marks and silver marks.
また、（Ａ）：（Ｃ）の配合割合が20：80では、ショー
トショット、フローマークは少なかったが、試験片の伸
びは80％、アイゾット衝撃強度は2.5kg・cm/cm2と劣って
いた。また、メルトインデックス（230℃、2160ｇ）は
４g/10minであった。When the blending ratio of (A) :( C) was 20:80, short shots and flow marks were small, but the elongation of the test piece was 80% and the Izod impact strength was inferior at 2.5 kg · cm / cm 2. It was The melt index (230 ° C, 2160g) was 4g / 10min.
比較例３ メルトインデックス（230℃、2160ｇ）５g/10minの新し
いポリプロピレン（Ｃ）ペレット70部と、酢酸ビニル含
有量40.0％、メルトインデックス55g/10minのエチレン
−酢酸ビニル共重合体（Ｂ）ペレット30部とをタンブラ
ーブレンダーにて予備混合した後、押出機に供給して、
バレル最高温度240℃にて溶融混合してマスターバッチ
ペレットを得た。Comparative Example 3 70 parts of new polypropylene (C) pellets having a melt index (230 ° C., 2160 g) of 5 g / 10 min and ethylene-vinyl acetate copolymer (B) pellets having a vinyl acetate content of 40.0% and a melt index of 55 g / 10 min 30 Parts were pre-mixed with a tumbler blender and then fed to the extruder,
Master batch pellets were obtained by melt mixing at a barrel maximum temperature of 240 ° C.
実施例１における粉砕物（Ａ）70部と上記で得たマスタ
ーバッチペレット30部とを予備混合した後、30mm径の押
出成形機に供給し、下記成形条件で押出成形して、ペレ
ット化した。After 70 parts of the pulverized product (A) in Example 1 and 30 parts of the masterbatch pellets obtained above were premixed, they were fed to an extruder having a diameter of 30 mm and extruded under the following molding conditions to form pellets. .
シリンダー温度 Ｃ１ 110℃ Ｃ２ 250℃ ダイ温度 Ｄ 220℃ 次にこのペレットを射出成形機に供給して、実施例１と
同様の条件で射出成形を行なったが、金型キャビティー
内への充填量が安定せず、充填不足のショートショット
の現象と、充填過剰によるバリの発生現象が不規則に起
り、射出成形自体が円滑にできなかった。なお、このペ
ッレットのメルトインデックス（230℃、2160ｇ）は0.2
g/10minであった。Cylinder temperature C 1 110 ° C. C 2 250 ° C. Die temperature D 220 ° C. Next, the pellets were supplied to an injection molding machine and injection molding was carried out under the same conditions as in Example 1, but the injection into the mold cavity was performed. The filling amount was not stable, the phenomenon of short shot of insufficient filling and the phenomenon of burrs due to excessive filling occurred irregularly, and injection molding itself could not be performed smoothly. The melt index of this pellet (230 ℃, 2160g) is 0.2.
It was g / 10min.
実施例２ 使用済のポリプロピレン／低密度ポリエチレン複層容器
を粉砕して粒径５mm以下の粉砕物（Ａ）を得た。ポリプ
ロピレンと低密度ポリエチレンの重量比は、およそ８：
２である。Example 2 A used polypropylene / low-density polyethylene multilayer container was crushed to obtain a crushed product (A) having a particle size of 5 mm or less. The weight ratio of polypropylene to low density polyethylene is approximately 8:
It is 2.
一方、メルトインデックス（230℃、2160ｇ）0.5g/10mi
n、粒径300μ以下の新しいポリプロピレン（Ｃ）粉末65
部と、酢酸ビニル含有量59.8％、メルトインデックス1.
2g/10min、粒径600μ以下のエチレン−酢酸ビニル共重
合体（Ｂ）粉末35部とをヘンシェルミキサーにて予備混
合した後、押出機に供給して、バレル最高温度240℃に
て溶融混合してマスターバッチペレットを得た。On the other hand, melt index (230 ℃, 2160g) 0.5g / 10mi
n, a new polypropylene (C) powder with a particle size of 300μ or less 65
Parts, vinyl acetate content 59.8%, melt index 1.
2 g / 10 min, 35 parts of ethylene-vinyl acetate copolymer (B) powder having a particle size of 600 μ or less was premixed with a Henschel mixer, then fed to an extruder and melt-mixed at a barrel maximum temperature of 240 ° C. To obtain a masterbatch pellet.
次に、上記粉砕物（Ａ）65部と上記で得たマスターバッ
チペレット35部とを予備混合した後、30mm径の押出成形
機に供給し、下記成形条件で押出成形して、ペレット化
した。Next, after 65 parts of the pulverized product (A) and 35 parts of the masterbatch pellets obtained above were premixed, they were fed to an extruder having a diameter of 30 mm and extruded under the following molding conditions to form pellets. .
シリンダー温度 Ｃ１ 180℃ Ｃ２ 240℃ ダイ温度 Ｄ 230℃ 次にこのペレットを射出成形機に供給して、下記条件で
試験片を成形した。成形は円滑であり、得られた試験片
の外観も良好であった。Cylinder temperature C 1 180 ° C. C 2 240 ° C. Die temperature D 230 ° C. Next, the pellets were supplied to an injection molding machine to mold a test piece under the following conditions. The molding was smooth, and the appearance of the obtained test piece was good.
シリンダー温度 Ｃ１ 190℃ Ｃ２ 250℃ ダイ温度 Ｄ 240℃ 金型温度 30℃ 成形サイクル 80秒 このようにして得られた試験片の物性を、実施例１の場
合と同様にして測定した。結果は次の通りであった。Cylinder temperature C 1 190 ° C. C 2 250 ° C. Die temperature D 240 ° C. Mold temperature 30 ° C. Molding cycle 80 seconds The physical properties of the test piece thus obtained were measured in the same manner as in Example 1. The results were as follows.
伸び 400％以上 アイゾット衝撃強度 7.2kg・cm/cm2 発明の効果 本発明において特定のエチレン−酢酸ビニル共重合体を
配合して成形することにより、成形物製造工程で発生す
るスプール、ランナー、バリ、耳端部、規格外品など未
使用の成形物はもとより、需要者において使用した後の
劣化の著しい成形物であっても円滑な再成形が可能とな
り、しかも、機械的強度や外観が好ましい成形物が得ら
れる。Elongation 400% or more Izod impact strength 7.2 kg · cm / cm 2 Effect of the invention Spools, runners, burrs generated in the molded product manufacturing process by mixing and molding a specific ethylene-vinyl acetate copolymer in the present invention , It is possible to smoothly re-form not only unused molded products such as ear ends and non-standard products, but also molded products that have been significantly deteriorated after being used by the consumer, and mechanical strength and appearance are preferable. A molded product is obtained.
よって、本発明は工業上および省資源上の意義が大きい
ものである。Therefore, the present invention has great significance in industrial and resource saving.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０８Ｌ 31:04） (Ｃ０８Ｌ 23/00 23:08） ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display area C08L 31:04) (C08L 23/00 23:08)
Claims (2)
物（Ａ）100重量部に、酢酸ビニル含有量50〜80重量
％、メルトインデックス0.5g/10min以上のエチレン−酢
酸ビニル共重合体（Ｂ）0.5〜50重量部を配合してなる
成形用樹脂組成物。1. An ethylene-vinyl acetate copolymer (B) having a vinyl acetate content of 50 to 80% by weight and a melt index of 0.5 g / 10 min or more per 100 parts by weight of a pulverized product (A) of a recovered polyolefin resin molded product. ) A resin composition for molding obtained by mixing 0.5 to 50 parts by weight.
しいポリオレフィン系樹脂（Ｃ）に予備配合した状態
で、ポリオレフィン系樹脂成形物回収品の粉砕物（Ａ）
に配合してなる特許請求の範囲第１項記載の組成物。2. A pulverized product (A) of a polyolefin resin molded product recovered in a state where an ethylene-vinyl acetate copolymer (B) is pre-blended with a new polyolefin resin (C).
The composition according to claim 1, which is blended with
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17268885A JPH0635522B2 (en) | 1985-08-05 | 1985-08-05 | Molding resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17268885A JPH0635522B2 (en) | 1985-08-05 | 1985-08-05 | Molding resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6232135A JPS6232135A (en) | 1987-02-12 |
| JPH0635522B2 true JPH0635522B2 (en) | 1994-05-11 |
Family
ID=15946513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17268885A Expired - Fee Related JPH0635522B2 (en) | 1985-08-05 | 1985-08-05 | Molding resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0635522B2 (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5141157B2 (en) * | 1972-08-08 | 1976-11-08 | ||
| JPS5513907B2 (en) * | 1973-04-14 | 1980-04-12 | ||
| JPS5929409B2 (en) * | 1975-02-05 | 1984-07-20 | 東レ株式会社 | Method for manufacturing multilayer structures |
| JPS5277160A (en) * | 1975-12-24 | 1977-06-29 | Kureha Chem Ind Co Ltd | Ethylene-vinyl alcohol copolymer compositions |
| JPS5830899B2 (en) * | 1977-09-14 | 1983-07-02 | 株式会社トクヤマ | Method for manufacturing porous polyolefin sheet |
| JPS6034461B2 (en) * | 1978-02-27 | 1985-08-08 | 三菱化学株式会社 | Method for manufacturing multilayer blow container |
| JPS55131033A (en) * | 1979-03-30 | 1980-10-11 | Mitsubishi Petrochem Co Ltd | Resin composition for wrapping material |
| JPS5918730B2 (en) * | 1979-12-26 | 1984-04-28 | 富士通株式会社 | Kana/Kanji conversion device |
| JPS5816413A (en) * | 1981-07-23 | 1983-01-31 | 日本電信電話株式会社 | Method of recovering waste cable sheath polyethylene |
| JPS59215864A (en) * | 1983-05-25 | 1984-12-05 | 株式会社ジェイエスピー | Manufacture of multilayer structure material |
| JPS6035061A (en) * | 1983-08-05 | 1985-02-22 | Seitetsu Kagaku Co Ltd | Coating composition |
-
1985
- 1985-08-05 JP JP17268885A patent/JPH0635522B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6232135A (en) | 1987-02-12 |
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