JPS61213236A - Olefin resin composition having excellent sealability in presence of foreign material and film composed of said composition - Google Patents
Olefin resin composition having excellent sealability in presence of foreign material and film composed of said compositionInfo
- Publication number
- JPS61213236A JPS61213236A JP5465885A JP5465885A JPS61213236A JP S61213236 A JPS61213236 A JP S61213236A JP 5465885 A JP5465885 A JP 5465885A JP 5465885 A JP5465885 A JP 5465885A JP S61213236 A JPS61213236 A JP S61213236A
- Authority
- JP
- Japan
- Prior art keywords
- density polyethylene
- density
- vinyl acetate
- sealing
- film
- 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.)
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Links
Abstract
Description
【発明の詳細な説明】
本発明は、夾雑物シール性、即ちヒートシール界面に夾
雑物が介在する状態でのヒートシール性に優れたオレフ
ィン樹脂組成物に関するもので、特に粉体等を充填し且
つヒートシールによる密封を行う袋の用途に有用な樹脂
組成物に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an olefin resin composition that has excellent contaminant-sealing properties, that is, heat-sealing properties when contaminants are present at the heat-sealing interface. The present invention also relates to a resin composition useful for use in bags that are sealed by heat sealing.
ぼりオレフィンフィルムから形成され九袋状密器は、防
湿性に優れ且つその開口部をヒートシールによシ容易に
密封し得ることから産業用重包装袋の用途に使用されて
いる。しかしながら、ポリエチレン製の袋に粉体を充填
する場合には、静電気的な影響によシ開ロ部に粉末が付
着し、ヒートシールが困難となシ、このため紙袋、特に
ノズル袋が一般に使用されている。A nine-bag-shaped airtight container formed from a olefin film is used for industrial heavy-duty packaging bags because it has excellent moisture resistance and its opening can be easily sealed by heat sealing. However, when filling polyethylene bags with powder, powder adheres to the opening due to static electricity, making heat sealing difficult. For this reason, paper bags, especially nozzle bags, are generally used. has been done.
重包装袋の用途に最も広く使用されている低密度ポリエ
チレンの場合、夾雑物が存在しない状態でのシール強度
は、一般に２．５乃至６ ｋｇ７１５ｍ巾のオー〆であ
るが、ヒートシール界面に粉体が付着し、夾雑している
場合にはヒートシールが困難であると共に、そのシール
強度も約０．５乃至２．０チのオーダに低下することが
認められた。In the case of low-density polyethylene, which is most widely used for heavy-duty packaging bags, the seal strength in the absence of contaminants is generally 2.5 to 6 kg and a width of 715 m. It has been found that heat sealing is difficult when the material is attached and contaminated, and the sealing strength is reduced to the order of about 0.5 to 2.0 inches.
更に、ｄリエチレン重袋用フィルムで問題となるこトハ
、ヒートシールＬ ％にヒートシールエツジ部の強度、
特に耐衝撃強度等が比較的低いということである。Furthermore, there are problems with the film for polyethylene heavy bags, and the strength of the heat seal edge part is
In particular, impact strength and the like are relatively low.
本発明者等は、分子量分布の狭いリニア低密度／ ＩＪ
エチレン（Ｌ −ＬＤＰＫ ） ｔ、通常の高圧法低密
度ポリエチレン（ＬＤＰＫ）また高圧法低密度エチレン
−酢酸ビニル共重合体に一定の量比で配合し九組成物は
、夾雑物ヒートシール性に顕著に優れており、粉体等を
充填するための型袋用フィルムとして特に優れているこ
とを見出した。The present inventors have developed a linear low density/IJ with narrow molecular weight distribution.
Ethylene (L-LDPK) is blended in a certain ratio with ordinary high-pressure processed low-density polyethylene (LDPK) or high-pressure processed low-density ethylene-vinyl acetate copolymer. It has been found that the film is particularly excellent as a mold bag film for filling powder, etc.
本発明の目的は、夾雑物ヒートシール性に優れ九オレフ
ィン樹脂組成物を提供するにある。An object of the present invention is to provide a nine-olefin resin composition with excellent contaminant heat-sealability.
本発明の他の目的は、ヒートシール作業性、高いヒート
シール強度及び優れた成形性の組合せを有し型袋用フィ
ルムとして有用なオレフィン樹脂組成物を提供するにあ
る。Another object of the present invention is to provide an olefin resin composition that has a combination of heat-sealing workability, high heat-sealing strength, and excellent moldability and is useful as a film for mold bags.
本発明の更に他の目的は、粉体の充填及び開口部のヒー
トシールの用途に適した重包装袋用フィルムを提供する
にある。Still another object of the present invention is to provide a film for heavy duty packaging bags suitable for powder filling and heat sealing of openings.
発明の構成
本発明によれば、分子量分布（ＭＷ／ＭＮ ）が６以下
のリニア低密度ポリエチレンと、高圧法低密度ポリエチ
レン又は高圧法低密度エチレン−酢酸ビニル共重合体と
ｔ−２０：８０乃至８０：２０の重量比、特に６０ ：
４０乃至４０ ：６０の重量比で含有することを特徴と
する夾雑物シール性に優れたオレフィン樹脂組成物が提
供される。Structure of the Invention According to the present invention, linear low-density polyethylene having a molecular weight distribution (MW/MN) of 6 or less, high-pressure low-density polyethylene or high-pressure low-density ethylene-vinyl acetate copolymer, and t-20:80 to Weight ratio of 80:20, especially 60:
An olefin resin composition having excellent impurity sealing properties is provided, which is characterized by containing the olefin resin in a weight ratio of 40 to 40:60.
本発明によれば更に、上記オレフィン樹脂組成物から成
る重包装袋用フィルムが提供される。According to the present invention, there is further provided a film for heavy duty packaging bags made of the above-mentioned olefin resin composition.
本発明においては、Ｍ１ｙ／ＭＨ（式中、Ｍｗは重量平
均分子量、Ｍ、は数平均分子量を表わす）で定義される
分子量分布が６以下、特に５乃至２の範囲にあるリニア
低密度ポリエチレン（Ｌ−ＬＤＰＥ） ！用いることが
、夾雑物シール性に関して極めて重要である。In the present invention, linear low-density polyethylene ( L-LDPE)! It is extremely important for contaminant sealing properties to be used.
第１表は、下記に示す種々のポリエチレンに関して、（
１）ヒートシール界面に夾雑物を介在させずにヒートシ
ールを行った場合、（２）ヒートシール界面に消石灰を
付着させてヒートシールを行った場合、（３）ヒートシ
ール界面に炭酸カルシウムを付着させてヒートシールを
行った場合の、ヒートシール強度（１＄１５ ｆｉ巾）
を示す。Table 1 shows (
1) When heat sealing is performed without intervening contaminants at the heat seal interface, (2) When heat sealing is performed with slaked lime attached to the heat seal interface, (3) When calcium carbonate is attached to the heat seal interface Heat sealing strength when heat sealing is performed (1$15 fi width)
shows.
用いたポリエチレン樹脂は次の通シである。The polyethylene resin used was as follows.
ＬＤＰＥＶＡ ：
酢酸ビニル含有量６％、密度０．９２６９７ｃａ ＭＷ
Ａ／ｉＮ及びメルトフロレー） ０．５ ｇ／１０ｍ１
ｎの高圧法低密度エチレン−酢酸ビニル共重合体。LDPEVA: Vinyl acetate content 6%, density 0.92697ca MW
A/iN and melt flow rate) 0.5 g/10m1
n high pressure process low density ethylene-vinyl acetate copolymer.
Ｌ −ＬＤＰＥ −１：
ＭＷ／ＭＮ ３．６ 、密度０．９２２ ＃／ｃｃ及び
メルトフローレート２．３Ｊ／１０ｍ１ｎのリニア低密
度ポリエチレン。L-LDPE-1: Linear low density polyethylene with MW/MN 3.6, density 0.922 #/cc and melt flow rate 2.3 J/10 m1n.
Ｌ −ＬＤＰＥ −２：
Ｍｖｔ／ＭＮ２．５、密度０．９３０ ！！／ｅＣ及び
メルトフローレート２．０ 、！ｉ＋／１０ｍ１ｎのリ
ニア低密度ポリエチレン。L-LDPE-2: Mvt/MN2.5, density 0.930! ! /eC and melt flow rate 2.0,! i+/10m1n linear low density polyethylene.
Ｌ−ＬＤＰＲ−３：
Ｍｖ／’ＭＮ７．６、密度０．９２１９／ｃｃ 及び
メルトフローレート０．６５ｇ／１０ｍ１ｎ のリニア
低密度ポリエチレン。L-LDPR-3: Linear low density polyethylene with Mv/'MN 7.6, density 0.9219/cc and melt flow rate 0.65 g/10 m1n.
上記第１表の結果は、通常の低密度ポリエチレンに比し
てヒートシール性に特に優れた高圧法低密度エチレン−
酢酸ビニル共重合体（ＬＤＰｇＶＡ）は、ヒートシール
界面に夾雑物が存在しない状態では満足すべきシール強
度を示すとしても、界面に夾雑物が存在する状態ではシ
ール強度が著しく低下することがわかる。また、このよ
うな傾向は、リニア低密度ポリエチレンの内でも、分子
量分布（Ｍｙ’Ｍｓ ）が６よシも大きいもの（Ｌ −
ＬＤＰＦ −３）において、一層顕著に認められる。こ
れに対して、本発明によれば、リニア低密度ポリエチレ
ンの内でも分子量分布の比較的狭いもの、即ちＭＹ／Ｍ
Ｎが６以下のものを用いることにより、シール界面に夾
雑物が存在する状態でのシール強度を顕著に向上させ得
ることがわかる。The results in Table 1 above show that high-pressure low-density ethylene has particularly excellent heat-sealability compared to regular low-density polyethylene.
Even though vinyl acetate copolymer (LDPgVA) exhibits satisfactory sealing strength in the absence of contaminants at the heat-sealing interface, it is found that the sealing strength is significantly reduced in the presence of contaminants at the interface. Furthermore, this tendency is also observed among linear low-density polyethylenes whose molecular weight distribution (My'Ms) is larger than 6 (L-
It is even more noticeable in LDPF-3). On the other hand, according to the present invention, among linear low density polyethylenes, those having a relatively narrow molecular weight distribution, that is, MY/M
It can be seen that by using a material with N of 6 or less, the seal strength can be significantly improved in the presence of foreign matter at the seal interface.
分子量分布の狭いリニア低密度ポリエチレンは、夾雑物
シール性が良いという特徴上布しているが、その反面、
（１）成形温度中が狭い、（ＩＩ）膜が垂下シ、厚物成
形が不可能である、（１１Ｄ高速成形に際し、折径が変
動したシ、ブロッキング管生じ、またサメ肌となって外
観特性が低下する、（ｉＶ）シール時に溶断を生ずる等
の欠点がある。成形性、シール適性を良くするために、
分子量分布を広げる等の対策を取シ得るが、この場合に
は第１表に示す通り、夾雑物シール性が失われることに
彦る・本発明は、ＭＷ／ＭＮが６以下のＩＪ ＝ア低密
度？リエチレンに、一定量の高圧法低密度ポリエチレン
ま九は高圧法低密度エチレン−酢酸ビニル共重合体を配
合することにより、夾雑物シール性を実質上維持しなが
ら、高速加工性（折径変動、ブロッキング）の改善、垂
れ下が９防止、フィルム外観の向上等の加工性や、シー
ル適性（シール時溶断防止）の向上等が可能となるもの
である。Linear low-density polyethylene, which has a narrow molecular weight distribution, is popular because of its good sealing properties against contaminants, but on the other hand,
(1) The molding temperature is narrow, (II) The film droops, making it impossible to mold thick materials. There are disadvantages such as deterioration of properties and (iv) melting during sealing.In order to improve moldability and sealability,
Measures such as widening the molecular weight distribution can be taken, but in this case, as shown in Table 1, the contaminant sealing property will be lost. Low density? By blending a certain amount of high-pressure low-density ethylene-vinyl acetate copolymer with polyethylene, high-pressure low-density polyethylene and vinyl acetate copolymer are blended together, allowing high-speed processability (folding diameter fluctuation, It is possible to improve processability such as blocking), prevent sagging, improve film appearance, and improve sealability (prevention of fusing during sealing).
発明の好適実施態様
尚、本発明書にシいて、リニア低密度ポリエチレン（Ｌ
−ＬＤＰＫ）とは、
Ｍ１ｇ／ＭＮ≦６ 密度０．９１０〜０．９４０９７ｃ
ｅＸ線回折法による結晶化度４０〜７０％融点 １１５
〜１３０℃
エチレン単位含有率９４〜９９．５モルチからなるエチ
レンと炭素原子５〜１０個を含有するα−オレフィンと
のランダム共重合体を意味する。Preferred Embodiments of the Invention In the present invention, linear low density polyethylene (L
-LDPK) means M1g/MN≦6 Density 0.910-0.94097c
Crystallinity 40-70% by eX-ray diffraction method Melting point 115
~130°C means a random copolymer of ethylene having an ethylene unit content of 94 to 99.5 mol and an α-olefin containing 5 to 10 carbon atoms.
本発明において使用する直鎖低密度ポリエチレンは、通
常使用される高圧法低密度／ ＩＪエチレンや低圧法高
密度ポリエチレンには認められない幾つかの化学構造上
の特徴を有している。The linear low-density polyethylene used in the present invention has several chemical structural features that are not found in commonly used high-pressure low-density/IJ ethylene and low-pressure high-density polyethylene.
即ち、高圧法低密度ポリエチレンは長鎖分岐を有する分
子構造で、エチレンの単一重合体であるのに対して、リ
ニア低密度ポリエチレンは実質上直鎖状の分子構造含有
し、しかるエチレンと炭素数４乃至８のα−オレフィン
との共重合体から成る。一方低圧法高密度ポリエチレン
は密度（２５℃）が０．９４０乃至０．９６５ 、！ｉ
’／ｃｍ”の範囲にあり、その分子構造は短かい分岐鎖
も殆んど有していないのに対して、リニア低密度ポリエ
チレンは、密度が０．９１５乃至０．９ ａ ｓ ｇ／
ｃｒｎ”の範囲にちゃ、前述したα−オレフィンに由来
する短鎖分岐鎖を有する点で相違している。That is, high-pressure low-density polyethylene has a molecular structure with long chain branches and is a single polymer of ethylene, whereas linear low-density polyethylene has a substantially straight-chain molecular structure, and the number of carbon atoms is It consists of a copolymer with 4 to 8 α-olefins. On the other hand, low-pressure high-density polyethylene has a density (at 25°C) of 0.940 to 0.965! i
linear low-density polyethylene has a density of 0.915 to 0.9 a s g/cm, and its molecular structure has almost no short branched chains.
crn'' range is different in that it has a short chain branch derived from the above-mentioned α-olefin.
このリニア低密度ポリエチレンにおける共単量体として
は、ブテン−１、ペンテン−１，４−メチルペンテン−
１、ヘキ七ンー１．２−メチル−ブテン−１、オクテン
−１等の炭素数４乃至８のα−オレフィンを挙げること
ができ、これらのα−オレフィンは全体当りｌ乃至２０
重量％、特に３乃至１５重量％の量で重合体鎖中に組込
まれている。Comonomers in this linear low density polyethylene include butene-1, pentene-1,4-methylpentene-
Examples include α-olefins having 4 to 8 carbon atoms such as 1, hexane-1, 2-methyl-butene-1, and octene-1, and these α-olefins contain 1 to 20 carbon atoms per total.
It is incorporated into the polymer chain in an amount of 3% to 15% by weight, in particular 3% to 15% by weight.
本発明においては、上述したリニア低密度ポリエチレン
の内でも、分子量分布（Ｍｗ／ＭＮ ）が６以下、特に
５乃至２の範囲内４’ｌるものを使用する。このリニア
低密度ポリエチレンのメルトフローレート（ＭＦＲ、Ｖ
ｌｏｍｉｎ）は一般に０．３乃至６、特ＫＯ１９乃至３
の範囲内にあることが望ましい。In the present invention, among the above-mentioned linear low density polyethylenes, those having a molecular weight distribution (Mw/MN) of 6 or less, particularly 4'l in the range of 5 to 2, are used. The melt flow rate (MFR, V
lomin) is generally 0.3 to 6, special KO19 to 3
It is desirable that it be within the range of .
本発明において、高圧法低密度ポリエチレンとしては、
前述したもの、特に密度が０．９１８乃至０、９２５１
１／ｅｅにあシ、ＭＦＲが０．１乃至４、特に０．２５
乃至”Ｖｌｏｍｉｎの範囲内にあるものが使用される。In the present invention, the high pressure low density polyethylene includes:
Those mentioned above, especially those with a density of 0.918 to 0.9251
1/ee reed, MFR 0.1 to 4, especially 0.25
to "Vlomin" is used.
この高圧法低密度ポリエチレンよシも本発明の目的に適
したものとして、酢酸ビニル共単量体を１乃至１５重量
％、特に２乃至８重量％の量で含み、密度及びＭＦＲが
上記範囲内にある高工法低密度エチレンー酢酸ビニル共
重合体を挙げることができる。This high-pressure low-density polyethylene is also suitable for the purpose of the present invention, containing vinyl acetate comonomer in an amount of 1 to 15% by weight, particularly 2 to 8% by weight, and having a density and MFR within the above range. Examples include high-density ethylene-vinyl acetate copolymers.
本発明において、Ｌ −ＬＤＰＥ ： ＬＤＰＥ又はＬ
ＤＰＦＪＶＡの配合重量比を２０：８０乃至８０：２０
、特に４０：６０乃至６０ ：４０の範囲とすることも
重要である。即ち、リニア低密度ポリエチレンの量が上
記範囲よりも少々い場合には、夾雑物シール性が失われ
、一方高圧法低密度ポリエチレンやエチレン−酢酸ビニ
ル共重合体の量が上記範囲よりも少ない場合には フィ
ルムへの加工性が低下し、またヒートシール適性が低下
するようＫなる。In the present invention, L-LDPE: LDPE or L
The blending weight ratio of DPFJVA is 20:80 to 80:20.
In particular, it is important to set the ratio to be in the range of 40:60 to 60:40. That is, if the amount of linear low density polyethylene is slightly less than the above range, the impurity sealing property will be lost, while if the amount of high pressure low density polyethylene or ethylene-vinyl acetate copolymer is less than the above range. In this case, the processability into a film decreases, and the heat sealability also decreases.
本発明においてこれら成分のブレンド方式トシては、固
体状成分を機械的に混合する方法、メルト状態でブレン
ドする方法、溶液状態でブレンドする方法等の種々の方
法全採用し得るが、メルト状態でブレンドする方法が最
も好適である。In the present invention, various methods can be used to blend these components, including mechanically mixing the solid components, blending them in a melt state, and blending them in a solution state. The most preferred method is blending.
本発明の組成物には、それ自体公知の配合剤、例えば立
体障害性フェノール類のような酸化防止剤、脂肪酸アミ
ド類のような滑剤、シリカ類、ゼオライト類等のアンチ
ブロッキング剤をそれ自体公知の処方に従って配合する
ことができる。The composition of the present invention contains additives known per se, such as antioxidants such as sterically hindered phenols, lubricants such as fatty acid amides, and anti-blocking agents such as silicas and zeolites. It can be blended according to the prescription.
フィルムへの成形は、それ自体公知のＴ−ダイ法やイン
フレーク１ン製膜法によりて容易に行うことができる。Forming into a film can be easily carried out by the T-die method or the flake one-film forming method, which are known per se.
本発明の組成物は、肥料、各種粉末化学薬品類等を充填
する重包装袋用フィルムとして特に有用で６！り、かか
る用途に対しては一般にその厚みがＺｏｏ乃至３００ｆ
ｉｍ、特に１５０乃至２００廂のフィルムの形で供給す
るのがよい。The composition of the present invention is particularly useful as a film for heavy packaging bags filled with fertilizers, various powdered chemicals, etc. 6! For such applications, the thickness is generally between Zoo and 300 f.
im, especially in the form of a film of 150 to 200 cm.
勿論、本発明の組成物は、各糧粉体、液滴或いはこれら
の混合物がシール界面に付着し良状態においても強固な
ヒートシールによる密封構造を形成し得ることから、ヒ
ートシールによシ密封構造を形成させる各種包装容器又
は蓋類の内面ヒートシール材としても有利に用いること
ができる。Of course, the composition of the present invention can be sealed by heat sealing, since each food powder, liquid droplet, or a mixture thereof can adhere to the seal interface and form a strong sealing structure by heat sealing even under good conditions. It can also be advantageously used as a heat-sealing material for the inner surface of various packaging containers or lids that form structures.
本発明を次の例で説明する。The invention is illustrated by the following example.
実施例 １
第１表において使用し次高圧法低密度エチレンー酢酸ビ
ニル共重合体（ＬＤＰＥＶＡ）及び第１表で用いた各種
リニア低密度ポリエチレンＬ−ＬＤＰＨ−１（ＭＹ／％
（Ｎ ＝ ３．６ ）、Ｌ −ＬＤＰＫ −２（Ｍ ｗ
／Ｍ Ｎ ＝＝ ２．５ ）及びＬ−ＬＤＰＥ −２（
Ｍ□Ｎ＝７゜６）の各々を５０対５００重量比でペンタ
イデー中で混練し、ペレットを製造した。Example 1 High pressure low density ethylene-vinyl acetate copolymer (LDPEVA) used in Table 1 and various linear low density polyethylene L-LDPH-1 (MY/%
(N = 3.6), L -LDPK -2 (M w
/M N == 2.5 ) and L-LDPE -2 (
M□N=7°6) were kneaded in a pentide at a weight ratio of 50:500 to produce pellets.
試料Ｉ ＬＤＰｇＶＡ／Ｌ−ＬＤＰＥ−１＝５０１
５０試料２ ＬＤＰＥＶＡ／ＸＪ−ＬＤＰＫ−２＝
５０１５０試料３ ＬＤＰｇＶＡ７Ｌ−ＬＤＰｊｉ−
３＝５０１５０この各種ペレット１押出機に供給し、２
００℃の温度で押出して、Ｔ−ダイ法によシ厚み０．２
ｙｎ及び巾２５０鵡のフィルムｔｇ造した。Sample I LDPgVA/L-LDPE-1=501
50 sample 2 LDPEVA/XJ-LDPK-2=
50150 Sample 3 LDPgVA7L-LDPji-
3=50150 These various pellets 1 are fed to the extruder, 2
Extruded at a temperature of 0.00°C and molded to a thickness of 0.2 using the T-die method.
A film tg of yn and width 250 mm was made.
得られた各種フィルムについて、（１）シール界面異物
未付着、（１１）シール界面消石灰付着及び（ｉｍシー
ル界面炭酸カルシウム付着の各々の場合について、ニュ
ーロング社トップシーラーＨ８２２型を使用し、シール
パー間隔 １００チ
冷却パー間隔 １２０チ
シール速度 １１ ｍ／ｍｉｎの条件及び第２
表に示す温度でヒートシールを行った。ヒートシール強
度を測定した結果を第２表に示す。For the obtained various films, (1) no foreign matter adhered to the seal interface, (11) slaked lime adhered to the seal interface, and (im seal interface adhered to calcium carbonate), Newlong Top Sealer H822 was used to determine the seal per interval. Conditions of 100-chi cooling par interval 120-chi seal speed 11 m/min and the second
Heat sealing was performed at the temperature shown in the table. The results of measuring the heat seal strength are shown in Table 2.
これらの試料１，２及び３のフィルムは何れもフィルム
成形性及びフィルム外観とも良好であシ、しカモヒート
シール時に溶断４なく、ヒートシール適性も良好であり
た。The films of Samples 1, 2, and 3 all had good film formability and film appearance, and had no melting breakage (4) during camo heat sealing, and had good heat sealability.
第２表の結果から、Ｍｗ／Ｍｙが６よシ大きいりニア低
密度ポリエチレンはブレンド物の形で使用しても、夾雑
物シール強度の著しい低下があるのに対して、Ｍｇ’Ｍ
Ｈが６以下のリニア低密度ポリエチレンはブレンド物の
形でも優れた夾雑物シール強度を示した。From the results in Table 2, it can be seen that even when low-density polyethylene with Mw/My greater than 6 is used in the form of a blend, there is a significant decrease in contaminant sealing strength, whereas Mg'M
Linear low density polyethylene with H of 6 or less showed excellent contaminant sealing strength even in the form of a blend.
実施例２
前述したＬＤＰＥＶＡ及びＬ −Ｉ、ＤＰＥ −３’ｉ
第３表で表わす量比で混練し、次いで実施例２と同様に
フィルムを製造し九。このフィルムの高速加工性、垂れ
下シ性、フィルム外観、シール適性について試験し、次
の基準で評価した。Example 2 LDPEVA and L-I, DPE-3'i described above
The mixture was kneaded in the proportions shown in Table 3, and then a film was produced in the same manner as in Example 2. This film was tested for high-speed processability, sag resistance, film appearance, and sealability, and evaluated based on the following criteria.
Ｏ高速加工性 Ｏ折径変動、ブロッキングを全く生じ危い。O High speed machinability There is a risk of O-fold diameter fluctuation and blocking.
○折径変動、ブロッキングが非常に少々い。○Variation in bending diameter and blocking are very slight.
Δ折径変動、ブロッキングをやや生じる。Δ fold diameter fluctuation and blocking occur slightly.
×折径変動、ブロッキングが著しい。×Creating diameter variation and blocking are significant.
０垂れ下シ Ｏ厚物成形時Ｋｌｉ下夛が全くない。0 drooping O There is no Kli layering at all when molding thick materials.
○厚物成形時に垂下シが殆んどない。○There is almost no sagging when forming thick materials.
Δ厚物成形時に垂下シラやや生じる。∆ Slight drooping occurs when molding thick materials.
×厚物成形時に垂下夛ヲ著しく生じる。*Significant sagging occurs when molding thick materials.
０フイルム外観 Ｏ外観が極めて良好。0 film appearance O Appearance is very good.
０外観が良好。0 Appearance is good.
Δサメ肌の発生がやや認められる。Δ Shark skin is slightly observed.
×サメ肌の発生が著しい。×The occurrence of shark skin is significant.
０シール適性 ◎シール時溶断を全く生じない。0 seal suitability ◎No melting occurs during sealing.
Ｏシール時溶断を殆んど生じない。Almost no melting occurs when O-sealed.
Δシール時溶断をやや生じる。∆ Slight melting occurs when sealing.
×シール時溶断を著しく生じる。× Significant melting occurs during sealing.
更に、実施例１と同様にシール強度を測定した。Furthermore, the seal strength was measured in the same manner as in Example 1.
得られた結果を下記第３表に示す。The results obtained are shown in Table 3 below.
第３表Table 3
Claims (2)
低密度ポリエチレンと高圧法低密度ポリエチレン又は高
圧法低密度エチレン−酢酸ビニル共重合体とを、２０：
８０乃至８０：２０の重量比で含有することを特徴とす
る夾雑物シール性に優れたオレフィン樹脂組成物。(1) Linear low-density polyethylene with a molecular weight distribution (M_W/M_N) of 6 or less and high-pressure low-density polyethylene or high-pressure low-density ethylene-vinyl acetate copolymer, 20:
An olefin resin composition having excellent impurity sealing properties, characterized in that it is contained in a weight ratio of 80 to 80:20.
物から成ることを特徴とする重包装袋用フィルム。(2) A film for heavy-duty packaging bags, comprising the olefin resin composition according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5465885A JPS61213236A (en) | 1985-03-20 | 1985-03-20 | Olefin resin composition having excellent sealability in presence of foreign material and film composed of said composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5465885A JPS61213236A (en) | 1985-03-20 | 1985-03-20 | Olefin resin composition having excellent sealability in presence of foreign material and film composed of said composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61213236A true JPS61213236A (en) | 1986-09-22 |
| JPH0551022B2 JPH0551022B2 (en) | 1993-07-30 |
Family
ID=12976884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5465885A Granted JPS61213236A (en) | 1985-03-20 | 1985-03-20 | Olefin resin composition having excellent sealability in presence of foreign material and film composed of said composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61213236A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019194100A (en) * | 2018-05-02 | 2019-11-07 | 日本マタイ株式会社 | Film for heavy duty packing bag and heavy duty packing bag |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5657841A (en) * | 1979-10-18 | 1981-05-20 | Mitsubishi Petrochem Co Ltd | Ethylenic polymer composition |
| JPS57195758A (en) * | 1981-05-29 | 1982-12-01 | Du Pont Mitsui Polychem Co Ltd | Impact energy absorber |
| JPS57202336A (en) * | 1981-06-03 | 1982-12-11 | Showa Denko Kk | Shock absorber |
| JPS59178221A (en) * | 1983-03-29 | 1984-10-09 | Mitsubishi Chem Ind Ltd | Preparation of packaging bag |
| JPS59203560A (en) * | 1983-05-02 | 1984-11-17 | 株式会社ニツシヨ− | Plastic container for injection |
| JPS6044540A (en) * | 1983-08-19 | 1985-03-09 | Asahi Chem Ind Co Ltd | Straight-chain low-density polyethylene resin composition |
-
1985
- 1985-03-20 JP JP5465885A patent/JPS61213236A/en active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5657841A (en) * | 1979-10-18 | 1981-05-20 | Mitsubishi Petrochem Co Ltd | Ethylenic polymer composition |
| JPS57195758A (en) * | 1981-05-29 | 1982-12-01 | Du Pont Mitsui Polychem Co Ltd | Impact energy absorber |
| JPS57202336A (en) * | 1981-06-03 | 1982-12-11 | Showa Denko Kk | Shock absorber |
| JPS59178221A (en) * | 1983-03-29 | 1984-10-09 | Mitsubishi Chem Ind Ltd | Preparation of packaging bag |
| JPS59203560A (en) * | 1983-05-02 | 1984-11-17 | 株式会社ニツシヨ− | Plastic container for injection |
| JPS6044540A (en) * | 1983-08-19 | 1985-03-09 | Asahi Chem Ind Co Ltd | Straight-chain low-density polyethylene resin composition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019194100A (en) * | 2018-05-02 | 2019-11-07 | 日本マタイ株式会社 | Film for heavy duty packing bag and heavy duty packing bag |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0551022B2 (en) | 1993-07-30 |
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