JP3316920B2 - Resin composition - Google Patents
Resin compositionInfo
- Publication number
- JP3316920B2 JP3316920B2 JP07362593A JP7362593A JP3316920B2 JP 3316920 B2 JP3316920 B2 JP 3316920B2 JP 07362593 A JP07362593 A JP 07362593A JP 7362593 A JP7362593 A JP 7362593A JP 3316920 B2 JP3316920 B2 JP 3316920B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- resin composition
- polyolefin
- eva
- present
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は高周波溶着に供すること
のできるポリオレフィン系樹脂組成物に関する。The present invention relates to a polyolefin resin composition which can be subjected to high frequency welding.
【０００２】[0002]
【従来の技術】ポリオレフィンは安価であり、加工性に
優れ、しかもベ−スとなるオレフィンの選択や、密度あ
るいは分子量のコントロ−ルにより幅広い物理的特性を
有する物を得ることができ、各種分野で広く使用されて
いる。しかしながらポリオレフィンは無極性樹脂である
ため誘電損失が小さく高周波溶着には適さないという欠
点を有している。2. Description of the Related Art Polyolefins are inexpensive, have excellent processability, and can be used to obtain products having a wide range of physical properties by controlling the base olefin and controlling the density or molecular weight. Widely used in. However, since polyolefin is a nonpolar resin, it has a disadvantage that it has a small dielectric loss and is not suitable for high frequency welding.
【０００３】高周波溶着は樹脂の内部で均一に発生した
熱により溶着させるものであり、外部から熱を加えるヒ
−トシ−ラ−やインパルスシ−ラ−と比較すると理想的
な温度分布が得られる。従って、安定した溶着が可能と
なる。また溶着しようとする任意の形状の電極を用いて
ワンショットで溶着、溶断ができるため、極めて生産性
の高いことも特徴となる。In high frequency welding, welding is performed by heat generated uniformly inside a resin, and an ideal temperature distribution can be obtained as compared with a heat sealer or an impulse sealer to which heat is applied from the outside. . Therefore, stable welding can be performed. In addition, since one-shot welding and fusing can be performed by using an electrode having an arbitrary shape to be welded, it is also characterized by extremely high productivity.
【０００４】高周波溶着が可能であり広く使用されてい
る樹脂として、ポリ塩化ビニルがあげられるが、ポリ塩
化ビニルは焼却の際、塩素ガスが発生する問題や、軟質
ポリ塩化ビニルの場合、可塑剤がブリ−ドアウトしてし
まい種々のトラブルの原因となる場合がある。一方エチ
レンとビニルエステルや不飽和カルボン酸エステルとの
共重合体も高周波溶着ができる樹脂としてあげられる
が、これらの共重合体は耐熱性が低いため、限られた用
途にしか使用できない。[0004] Polyvinyl chloride is one of the widely used resins which can be subjected to high frequency welding. Polyvinyl chloride is problematic in that chlorine gas is generated during incineration, and in the case of soft polyvinyl chloride, a plasticizer is used. May bleed out and cause various troubles. On the other hand, copolymers of ethylene with vinyl esters or unsaturated carboxylic acid esters are also examples of resins that can be subjected to high frequency welding. However, these copolymers have low heat resistance and can be used only for limited applications.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、ポリ
オレフィンの特性を保持したまま、高周波溶着が可能な
ポリオレフィン系の樹脂組成物を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a polyolefin-based resin composition capable of high-frequency welding while maintaining the characteristics of the polyolefin.
【０００６】[0006]
【課題を解決するための手段】本発明者らは、かかる点
を考慮し、鋭意検討した結果、ポリオレフィンと特定の
エチレン−酢酸ビニル共重合体（以下、ＥＶＡと略す）
からなる組成物であると高周波溶着が可能であることを
見出し本発明に至った。Means for Solving the Problems The inventors of the present invention have conducted intensive studies in consideration of such points, and as a result, have found that polyolefin and a specific ethylene-vinyl acetate copolymer (hereinafter abbreviated as EVA).
The present inventors have found that high-frequency welding is possible when the composition is composed of:
【０００７】即ち、本発明は、ポリオレフィン６０−９
５重量％及び乳化重合法により得られる、１９０℃、２
１．６ｋｇにおけるメルトフロ−レ−ト（以下、ＭＦＲ
と略す）が５−１００ｇ／１０分、酢酸ビニル含量が４
０−８０重量％であるＥＶＡ５−４０重量％からなる樹
脂組成物に関するものである。以下、本発明を詳細に説
明する。That is, the present invention relates to a polyolefin 60-9.
5% by weight and obtained by an emulsion polymerization method, 190 ° C., 2
Melt flow rate at 1.6 kg (hereinafter referred to as MFR
5 to 100 g / 10 min, and a vinyl acetate content of 4
The present invention relates to a resin composition comprising 0 to 80% by weight of EVA 5 to 40% by weight. Hereinafter, the present invention will be described in detail.
【０００８】本発明に使用されるポリオレフィンとは、
低密度ポリエチレン、中密度ポリエチレン、高密度ポリ
エチレン、ポリプロピレン、エチレン−α−オレフィン
共重合体等の無極性樹脂であり、また、これらの２種以
上の混合物であってもかまわない。The polyolefin used in the present invention is:
It is a non-polar resin such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene, ethylene-α-olefin copolymer, or a mixture of two or more of these.
【０００９】本発明に使用されるＥＶＡとは、乳化重合
によりエチレンと酢酸ビニルを共重合して得られるもの
である。本発明において用いられるＥＶＡの酢酸ビニル
含量は４０−８０重量％のものであり、酢酸ビニル含量
が４０重量％未満であると高周波溶着がしにくくなるた
め好ましくない。また、８０重量％を越えると、ポリオ
レフィンとの相溶性が悪くなるため、得られる樹脂組成
物は耐熱性や、機械的強度が低下するため好ましくな
い。EVA used in the present invention is an emulsion polymerization.
To obtain ethylene and vinyl acetate. EVA used in the present invention has a vinyl acetate content of 40 to 80% by weight, and if the vinyl acetate content is less than 40% by weight, high frequency welding becomes difficult, which is not preferable. On the other hand, if it exceeds 80% by weight, the compatibility with the polyolefin becomes poor, and the resulting resin composition is not preferred because the heat resistance and the mechanical strength are reduced.
【００１０】該ＥＶＡの１９０℃、２１．６ｋｇ加重と
いう条件でのＭＦＲは５−１００ｇ／１０分である。Ｍ
ＦＲが５未満では流動特性が低過ぎるためポリオレフィ
ンとの相溶性が悪くなり、得られる樹脂組成物は、機械
的強度が低下するため好ましくない。また、１００ｇ／
１０分を越えるＥＶＡは機械的強度に劣るため、その結
果、ポリオレフィンとの組成物としても機械的強度が低
下することになり好ましくない。The MFR of the EVA at 190 ° C. under a load of 21.6 kg is 5-100 g / 10 min. M
When the FR is less than 5, the flow characteristics are too low, so that the compatibility with the polyolefin is deteriorated, and the resulting resin composition is not preferable because the mechanical strength is reduced. Also, 100g /
EVA exceeding 10 minutes is inferior in mechanical strength, and as a result, even in a composition with polyolefin, mechanical strength is undesirably reduced.
【００１１】ポリオレフィンと上記ＥＶＡとの添加比率
は、ポリオレフィン６０−９５重量％、ＥＶＡ５−４０
重量％が好ましい範囲である。ＥＶＡの比率が５重量％
未満であると高周波溶着がしにくくなるため好ましくな
い。また、４０重量％を越えると、得られる樹脂組成物
は耐熱性や、機械的強度が低下するため好ましくない。The addition ratio of polyolefin to EVA is 60-95% by weight of polyolefin and EVA5-40.
% Is a preferred range. EVA ratio of 5% by weight
If it is less than this, it is not preferable because high-frequency welding becomes difficult. On the other hand, when the content exceeds 40% by weight, the resulting resin composition is not preferred because heat resistance and mechanical strength are reduced.
【００１２】本発明の樹脂組成物を得るためのポリオレ
フィンとＥＶＡとの混合方法は特に制限は無く、一般的
な方法が採用でき、例えば、熱ロ−ルによる混練、バン
バリ−や押出機による混練等があげられる。The method of mixing the polyolefin and EVA to obtain the resin composition of the present invention is not particularly limited, and a general method can be employed. For example, kneading by a hot roll, kneading by a Banbury or an extruder can be used. And the like.
【００１３】本発明の樹脂組成物は、必要に応じて酸化
防止剤、耐候安定剤、紫外線吸収剤、滑剤、ブロッキン
グ防止剤等、通常ポリオレフィンに使用されている添加
剤を本発明の効果を阻害しない範囲で添加してもかまわ
ない。[0013] The resin composition of the present invention may contain additives, such as antioxidants, weather stabilizers, ultraviolet absorbers, lubricants, and antiblocking agents, which are commonly used in polyolefins, to inhibit the effects of the present invention. You may add in the range which does not do.
【００１４】[0014]
【実施例】以下、実施例にて更に本発明を説明する。EXAMPLES The present invention will be further described below with reference to examples.
【００１５】実施例１ 密度０．９００ｇ／ｃｍ3、１９０℃、２．１６ｋｇに
おけるＭＦＲ２．０ｇ／１０分のエチレン−α−オレフ
ィン共重合体８０重量％と、酢酸ビニル含量６０重量
％、１９０℃、２１．６ｋｇにおけるＭＦＲ１０ｇ／１
０分のＥＶＡ２０重量％とを予めドライブレンドし押出
機にて溶融混練した。本組成物を熱プレスにてプレスす
ることにより、１ｍｍ厚みのシ−トを作成した。このシ
−トを精電舎電子工業製高周波ウェルダ−ＫＶ３００Ｔ
Ａを用いて溶着させ、そのシ−ル強度を測定した。溶着
の条件は、次の通りであった。 発振周波数：４０．４６ＭＨＺ 発振時間 ：６秒 冷却時間 ：４秒 熱変形温度は下記の条件で測定した。 サンプル作成条件：熱プレスにより３ｍｍ厚みのシ−ト
を作成した。EXAMPLE 1 80% by weight of an ethylene-α-olefin copolymer having a MFR of 2.0 g / 10 min at a density of 0.900 g / cm 3 and 190 ° C. and 2.16 kg, a vinyl acetate content of 60% by weight and 190 ° C. , MFR 10 g / 1 at 21.6 kg
Dry blending with 20% by weight of EVA for 0 minutes was carried out in advance and melt-kneaded with an extruder. The composition was pressed with a hot press to form a sheet having a thickness of 1 mm. This sheet is a high frequency welder KV300T manufactured by Seidensha Electronics Co., Ltd.
A was used for welding, and the seal strength was measured. The welding conditions were as follows. Oscillation frequency: 40.46 MHZ Oscillation time: 6 seconds Cooling time: 4 seconds Heat deformation temperature was measured under the following conditions. Sample preparation conditions: A sheet having a thickness of 3 mm was prepared by hot pressing.
【００１６】測定条件 ：熱変形温度のテスト装
置を第１図の様にセットする。Measurement conditions: A test device for the heat distortion temperature is set as shown in FIG.
【００１７】次に、雰囲気温度を１２０℃／時間で上昇
させ、圧子が１ｍｍ沈んだ時の温度を熱変形温度とす
る。 試験片 ：１８×１８×３ｍｍｔ 荷重 ：１０００ｇ 破断強度はＪＩＳ Ｋ ６７６０に準拠して測定した。
いずれの結果も表１に示した。Next, the ambient temperature is increased at 120 ° C./hour, and the temperature when the indenter sinks by 1 mm is defined as the heat deformation temperature. Test piece: 18 × 18 × 3 mmt Load: 1000 g The breaking strength was measured according to JIS K6760.
All the results are shown in Table 1.
【００１８】実施例２ ポリオレフィンの密度を０．９１０ｇ／ｃｍ3に変えた
以外は、実施例１と同様にして組成物を作成し、高周波
ウェルダ−及び熱変形温度を測定した。結果は表１に示
した。Example 2 A composition was prepared in the same manner as in Example 1 except that the density of the polyolefin was changed to 0.910 g / cm 3 , and a high-frequency welder and a heat distortion temperature were measured. The results are shown in Table 1.
【００１９】実施例３ 密度０．９２２ｇ／ｃｍ3、１９０℃、２．１６ｋｇに
おけるＭＦＲが２ｇ／１０分の低密度ポリエチレンを用
いる以外は、実施例１と同様にして組成物を作成し、高
周波ウェルダ−及び熱変形温度を測定した。結果は表１
に示した。Example 3 A composition was prepared in the same manner as in Example 1 except that low density polyethylene having an MFR of 2 g / 10 min at a density of 0.922 g / cm 3 , 190 ° C. and 2.16 kg was used. Welder and heat distortion temperatures were measured. Table 1 shows the results
It was shown to.
【００２０】比較例１ ＥＶＡの比率を３重量％とする以外は、実施例１と同様
にして組成物を作成し、高周波ウェルダ−及び熱変形温
度を測定した。結果は表１に示した。Comparative Example 1 A composition was prepared in the same manner as in Example 1 except that the ratio of EVA was changed to 3% by weight, and a high-frequency welder and a heat distortion temperature were measured. The results are shown in Table 1.
【００２１】比較例２ ＥＶＡの比率を６０重量％とする以外は、実施例１と同
様にして組成物を作成し、高周波ウェルダ−及び熱変形
温度を測定した。結果は表１に示した。Comparative Example 2 A composition was prepared in the same manner as in Example 1 except that the ratio of EVA was changed to 60% by weight, and a high-frequency welder and a heat distortion temperature were measured. The results are shown in Table 1.
【００２２】比較例３ 酢酸ビニル含量２８重量％、１９０℃、２．１６ｋｇに
おけるＭＦＲが６ｇ／１０分のＥＶＡを用いる以外は、
実施例１と同様にして組成物を作成し、高周波ウェルダ
−及び熱変形温度を測定した。結果は表１に示した。Comparative Example 3 Except that EVA having a vinyl acetate content of 28% by weight and an MFR of 6 g / 10 min at 190 ° C. and 2.16 kg was used.
A composition was prepared in the same manner as in Example 1, and the high-frequency welder and the heat distortion temperature were measured. The results are shown in Table 1.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【発明の効果】以上の説明から明らかなように本発明の
樹脂組成物は、ポリオレフィンの特性を保持したまま高
周波溶着ができるため、ポリ塩化ビニルやエチレン−ビ
ニルエステル共重合体の代替として広く利用できる。As is clear from the above description, the resin composition of the present invention can be used for high frequency welding while maintaining the characteristics of polyolefin, and thus is widely used as a substitute for polyvinyl chloride or ethylene-vinyl ester copolymer. it can.
【図１】熱変形温度装置の圧子周辺部の拡大図を示す。
（Ａ）は正面図、（Ｂ）は側面図を示す。 １．荷重棒 ２．圧子 ３．試験片FIG. 1 is an enlarged view of the periphery of an indenter of a heat deformation temperature device.
(A) shows a front view and (B) shows a side view. 1. Load rod 2. Indenter 3. Test pieces
【図１】熱変形温度装置の圧子周辺部の拡大図を示す。
（Ａ）は正面図、（Ｂ）は側面図を示す。 １．荷重棒 ２．圧子 ３．試験片FIG. 1 is an enlarged view of the periphery of an indenter of a heat deformation temperature device.
(A) shows a front view and (B) shows a side view. 1. Load rod 2. Indenter 3. Test pieces
Claims (1)
重合法により得られる、１９０℃、２１．６ｋｇにおけ
るメルトフロ−レ−トが５−１００ｇ／１０分、酢酸ビ
ニル含量が４０−８０重量％であるエチレン−酢酸ビニ
ル共重合体５−４０重量％からなる高周波溶着用樹脂組
成物。1. A poly olefin 60-95 wt% and emulsion
From 5-40% by weight of an ethylene-vinyl acetate copolymer having a melt flow rate at 190 ° C. and 21.6 kg having a melt flow rate of 5-100 g / 10 minutes and a vinyl acetate content of 40-80% by weight obtained by a polymerization method. RF welding resin composition comprising.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07362593A JP3316920B2 (en) | 1993-03-31 | 1993-03-31 | Resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07362593A JP3316920B2 (en) | 1993-03-31 | 1993-03-31 | Resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06287362A JPH06287362A (en) | 1994-10-11 |
| JP3316920B2 true JP3316920B2 (en) | 2002-08-19 |
Family
ID=13523690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07362593A Expired - Fee Related JP3316920B2 (en) | 1993-03-31 | 1993-03-31 | Resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3316920B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI1015575A2 (en) * | 2009-07-02 | 2016-04-26 | Saint Gobain Performance Plast | sealable material and method of forming a dielectric weld. |
-
1993
- 1993-03-31 JP JP07362593A patent/JP3316920B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06287362A (en) | 1994-10-11 |
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