JPS62202729A - Notch-less film and manufacture thereof - Google Patents
Notch-less film and manufacture thereofInfo
- Publication number
- JPS62202729A JPS62202729A JP4589586A JP4589586A JPS62202729A JP S62202729 A JPS62202729 A JP S62202729A JP 4589586 A JP4589586 A JP 4589586A JP 4589586 A JP4589586 A JP 4589586A JP S62202729 A JPS62202729 A JP S62202729A
- Authority
- JP
- Japan
- Prior art keywords
- film
- heat
- resin layer
- sheet
- stretched
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 229920005989 resin Polymers 0.000 claims description 62
- 239000011347 resin Substances 0.000 claims description 62
- 239000006260 foam Substances 0.000 claims description 41
- 239000002131 composite material Substances 0.000 claims description 32
- 229920001169 thermoplastic Polymers 0.000 claims description 13
- 239000004416 thermosoftening plastic Substances 0.000 claims description 13
- 239000010410 layer Substances 0.000 description 40
- 238000007789 sealing Methods 0.000 description 24
- 238000000034 method Methods 0.000 description 11
- 239000004604 Blowing Agent Substances 0.000 description 8
- -1 polyethylene Polymers 0.000 description 8
- 229920001577 copolymer Polymers 0.000 description 7
- 239000011342 resin composition Substances 0.000 description 7
- 239000004088 foaming agent Substances 0.000 description 6
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 5
- 235000019399 azodicarbonamide Nutrition 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 5
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 4
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000005022 packaging material Substances 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229920000554 ionomer Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- CRSOQBOWXPBRES-UHFFFAOYSA-N neopentane Chemical compound CC(C)(C)C CRSOQBOWXPBRES-UHFFFAOYSA-N 0.000 description 2
- DDMOUSALMHHKOS-UHFFFAOYSA-N 1,2-dichloro-1,1,2,2-tetrafluoroethane Chemical compound FC(F)(Cl)C(F)(F)Cl DDMOUSALMHHKOS-UHFFFAOYSA-N 0.000 description 1
- ICGLPKIVTVWCFT-UHFFFAOYSA-N 4-methylbenzenesulfonohydrazide Chemical compound CC1=CC=C(S(=O)(=O)NN)C=C1 ICGLPKIVTVWCFT-UHFFFAOYSA-N 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 241000430525 Aurinia saxatilis Species 0.000 description 1
- KFYLTWDYLKZCIE-UHFFFAOYSA-N CC=1C(=C(C(=O)N[N+](=O)[O-])C=CC1C(=O)N[N+](=O)[O-])C Chemical compound CC=1C(=C(C(=O)N[N+](=O)[O-])C=CC1C(=O)N[N+](=O)[O-])C KFYLTWDYLKZCIE-UHFFFAOYSA-N 0.000 description 1
- MWRWFPQBGSZWNV-UHFFFAOYSA-N Dinitrosopentamethylenetetramine Chemical compound C1N2CN(N=O)CN1CN(N=O)C2 MWRWFPQBGSZWNV-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- VJRITMATACIYAF-UHFFFAOYSA-N benzenesulfonohydrazide Chemical compound NNS(=O)(=O)C1=CC=CC=C1 VJRITMATACIYAF-UHFFFAOYSA-N 0.000 description 1
- 239000002666 chemical blowing agent Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 229940087091 dichlorotetrafluoroethane Drugs 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229920005648 ethylene methacrylic acid copolymer Polymers 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- KINULKKPVJYRON-PVNXHVEDSA-N n-[(e)-[10-[(e)-(4,5-dihydro-1h-imidazol-2-ylhydrazinylidene)methyl]anthracen-9-yl]methylideneamino]-4,5-dihydro-1h-imidazol-2-amine;hydron;dichloride Chemical compound Cl.Cl.N1CCN=C1N\N=C\C(C1=CC=CC=C11)=C(C=CC=C2)C2=C1\C=N\NC1=NCCN1 KINULKKPVJYRON-PVNXHVEDSA-N 0.000 description 1
- ALIFPGGMJDWMJH-UHFFFAOYSA-N n-phenyldiazenylaniline Chemical compound C=1C=CC=CC=1NN=NC1=CC=CC=C1 ALIFPGGMJDWMJH-UHFFFAOYSA-N 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000003348 petrochemical agent Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 229940029284 trichlorofluoromethane Drugs 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は新規なノツチレスフィルム及びその製造方法に
関するものである。さらに詳しくいえば。DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a novel knotless film and a method for producing the same. In more detail.
本発明は、包装材料として好適な、優nた緩衝性及び断
熱性を有し、かつ易引裂性である上にヒートシールが容
易なノツチレスフィルム、及びこのものを容易に製造す
る方法に関するものである。The present invention relates to a knotless film suitable as a packaging material, which has excellent cushioning and heat insulation properties, is easy to tear, and is easy to heat seal, and a method for easily producing the same. It is.
従来の枝骨
従来、易引裂性フィルムにおいては、効果的な引裂性を
もたせるために、高温、高倍率で延伸してその分子配向
性を高める、素材として強度及び腰の強い樹脂組成物を
用いる。フィルム自体を発泡させる。などの手段がとら
nている。Conventional ramus conventionally, in order to provide effective tearability, a strong and stiff resin composition is used as the material, which is stretched at high temperature and high magnification to enhance its molecular orientation. Foam the film itself. Measures such as these are being taken.
このようにして作成されたフィルムは低温で溶融しにく
く、かつ熱伝導性が悪いので、ヒートシールが非常に困
難であり、そのため包装材としてはヒートシールが不要
な極めて限定された分野にしか使用さ几ていない。Films created in this way are difficult to melt at low temperatures and have poor thermal conductivity, making it extremely difficult to heat-seal, so they can only be used as packaging materials in extremely limited fields where heat-sealing is not required. It's not clear yet.
したがって、このような易引裂性フィルムにヒートシー
ル性をもたせるために、例えば低融点樹脂組成物を塗布
又は積層する方法がとらnている。Therefore, in order to impart heat-sealing properties to such easily tearable films, a method of coating or laminating a low melting point resin composition has been adopted, for example.
しかしながら、このような方法によると、フィルム表面
に均一な連続膜が形成さnて引裂性が阻害されるために
、引裂個所に切9目や破線加工を施す必要があり、コス
ト高になるのを免註ない。However, with this method, a uniform continuous film is formed on the film surface, which impedes tearability, and it is necessary to make cuts or broken lines at the tear point, which increases the cost. Please note that
発明が解決しようとする問題点
本発明の目的は、このような従来のヒートシール性フィ
ルムの欠点を克服し、包装材料として好適な、優れた緩
衝性及び断熱性を有し、かつ易引裂性である上にヒート
ンールが容易で、切シ目や破線加工を施す必要のない、
いわゆるノツチレスフィルムを提供することにある。Problems to be Solved by the Invention The purpose of the present invention is to overcome the drawbacks of the conventional heat-sealable film, and to create a film that is suitable as a packaging material, has excellent cushioning and heat insulation properties, and is easy to tear. In addition, it is easy to heat-roll, and there is no need to cut or break lines.
The purpose of the present invention is to provide a so-called notchless film.
問題点を解決するための手段
本発明者らは鋭意研究を重ねた結果、熱可塑性発泡シー
トの表面に、所定の厚みを有する気泡を含有したヒート
シール性樹脂層を設け、一軸方向に延伸加工して、該ヒ
ートシール性樹脂層を網目構造とすることにより、前記
目的を達成しうることを見出し、この知見に基づいて本
発明をなすに至った。Means for Solving the Problems As a result of extensive research, the inventors of the present invention provided a heat-sealable resin layer containing air bubbles with a predetermined thickness on the surface of a thermoplastic foam sheet, and stretched it in a uniaxial direction. Then, the inventors discovered that the above object could be achieved by forming the heat-sealable resin layer into a network structure, and based on this knowledge, the present invention was accomplished.
すなわち、本発明は、一軸方向に延伸された熱可塑性発
泡フィルムの少なくとも片面に、網目構造を有するヒー
トシール性樹脂層を、その樹脂量が該発泡フィルム12
当り2〜8ccになるような厚みで設けて成る易引裂性
ノツチレスフィルムを提供するものであり、このものは
、熱可塑性発泡シートの少なくとも片面に、気泡を含有
したヒートシール性樹脂層を、その樹脂量が延伸後の発
泡フィルムIn’当り2〜8ccになるような厚みで設
け、次いでこの複合シートを一軸方向に延伸加工して該
ヒートシール性樹脂層を網目構造となすことにより、容
易に得ら扛る。That is, the present invention provides a heat-sealable resin layer having a network structure on at least one side of a thermoplastic foam film stretched in a uniaxial direction, and the amount of the resin is equal to or greater than the foam film 12.
This provides an easily tearable knotless film provided with a thickness of 2 to 8 cc per sheet, and this film includes a heat-sealable resin layer containing air bubbles on at least one side of a thermoplastic foam sheet. By providing the resin at a thickness such that the amount of resin is 2 to 8 cc per expanded film In' after stretching, and then stretching this composite sheet in a uniaxial direction to form the heat-sealable resin layer into a network structure, it is easy to I get it.
本発明における熱可塑性発泡シートに用いらnる樹脂(
シート用樹脂)としては1例えばポリエチレン、ポリプ
ロピレン、エチレン−プロピレン共重合体、エチレン−
プロピレン・ブテン共重合体など、フィルムとした場合
に延伸加工が可能な熱可塑性樹脂が挙げらnる。The resin used for the thermoplastic foam sheet in the present invention (
Examples of sheet resins include polyethylene, polypropylene, ethylene-propylene copolymer, and ethylene-propylene copolymer.
Examples include thermoplastic resins that can be stretched when made into a film, such as propylene-butene copolymers.
一万、ヒートシール性樹脂層に用いらnる樹脂(ヒート
シール用樹脂)は、前記シート用樹脂よりも融点が低く
、かつ該樹脂との相溶性に優れたものであることが必要
で、このようなものとしては1例えばエチレン−酢酸ビ
ニル共重合体、変性ポリプロピレン、アイオノマー樹脂
、低密度ポリエチレン、直鎖線状ポリエチレンなどの低
融点熱可塑性樹脂が挙げらnる。10,000, the resin used for the heat-sealing resin layer (heat-sealing resin) must have a lower melting point than the resin for the sheet and be highly compatible with the resin, Examples of such resins include low-melting thermoplastic resins such as ethylene-vinyl acetate copolymers, modified polypropylene, ionomer resins, low-density polyethylene, and linear polyethylene.
本発明においては、まず熱可塑性発泡シートの片面又は
両面に、気泡を含有したヒートシール性樹脂層を設ける
。このヒートシール性樹脂層を設ける方法としては、発
泡剤含Mのンート用樹脂組成物と1発泡剤含有のヒート
シール性樹脂組成物とを1例えば同時押出成形する方法
、共押出成形する方法、押出ラミネートする方法などを
用いることができる。In the present invention, first, a heat-sealable resin layer containing air bubbles is provided on one or both sides of a thermoplastic foam sheet. Methods for providing this heat-sealable resin layer include, for example, a method of co-extrusion molding a foaming agent-containing resin composition for a cartridge and a foaming agent-containing heat-sealable resin composition; A method such as extrusion lamination can be used.
前記発泡剤としては、化学発泡剤や物理的発泡剤を用い
ることができる。化学発泡剤としては、例えば炭酸アン
モニウム、重炭酸ナトリウム、アジド化合物などの無機
系分解型発泡剤、アゾジカルボアミド、アゾビスイソブ
チロニトリル、ジアゾアミノベンゼン、 N、N’−
ジニトロソペンタメチレンテトラミン、 N、N’−
ジメチル−N、N’−ジニトロテレフタルアミド、ベン
ゼンスルホニルヒドラジド、p−トルエンスルホニルヒ
ドラジド、 p、p’−オキシベンゼンスルホニルヒ
ドラジドなどの有機系分解型発泡剤が挙げらn、物理的
発泡剤としては、例えばペンタン、ネオペンタン、ヘキ
サン。As the foaming agent, a chemical foaming agent or a physical foaming agent can be used. Examples of chemical blowing agents include ammonium carbonate, sodium bicarbonate, inorganic decomposition type blowing agents such as azide compounds, azodicarboxamide, azobisisobutyronitrile, diazoaminobenzene, N, N'-
Dinitrosopentamethylenetetramine, N,N'-
Organic decomposition type blowing agents such as dimethyl-N,N'-dinitroterephthalamide, benzenesulfonyl hydrazide, p-toluenesulfonyl hydrazide, p,p'-oxybenzenesulfonyl hydrazide and the like are mentioned, and physical blowing agents include: For example, pentane, neopentane, hexane.
インヘキサン、ヘプタン、イソへブタン、ベンゼン、ト
ルエン、二塩化メチレン、トリクロロフルオロメタン、
ジクロロテトラフルオロエタンなどが挙げらnる。こn
らの発泡剤はそnぞn単独で用いてもよいし、2種以上
組み合わせて用いてもよい。Inhexane, heptane, isohebutane, benzene, toluene, methylene dichloride, trichlorofluoromethane,
Examples include dichlorotetrafluoroethane. This
These blowing agents may be used alone or in combination of two or more.
次に、このようにして熱可塑性発泡シートの片面又は両
面に気泡を含有したヒートシール性樹脂層を設けた複合
シートを一軸方向に延伸加工する。Next, the composite sheet in which the heat-sealable resin layer containing air bubbles is provided on one or both sides of the thermoplastic foam sheet is uniaxially stretched.
この延伸加工によって、一方向に分子配向さnるととも
に、該ヒートシール性樹脂層は気泡の隔壁が切断さnて
網目状となる。このヒートシール性樹脂層の厚みについ
ては、その樹脂量が延伸後の発泡フィルム1rr?当り
2〜Bcc、好ましくは4〜6CCの範囲にあるような
厚みであることが必要である。該樹脂量が2CC未満で
はヒートシール効果が得らnず、−万13cc’(i−
超えると引裂性が損われる。また、延伸倍率は通常4〜
7倍の範囲で選ばれる。By this stretching process, the molecules are oriented in one direction, and the partition walls of the cells in the heat-sealable resin layer are cut to form a network. Regarding the thickness of this heat-sealable resin layer, the amount of resin is 1rr of the foamed film after stretching. It is necessary that the thickness be in the range of 2 to 6 CC, preferably 4 to 6 CC. If the amount of the resin is less than 2 cc, the heat sealing effect cannot be obtained and -13 cc'(i-
If it is exceeded, tearability will be impaired. In addition, the stretching ratio is usually 4~
Selected within a 7x range.
熱可塑性発泡シートの表面に気泡を含有しなりヒートシ
ール性樹脂層を設ける場合、高倍率で延伸加工しても、
該樹脂層は網目状とならず、したがって得らrたフィル
ムは、ヒートシールは可能となるものの、引裂性が損わ
n、容易に引裂くことができないので、切目や破線加工
を施す必要がある。こnに対し、前記のようにして得ら
Cた本発明のフィルムは、ヒートシール性樹脂層が網目
構造を有しているので、引裂性が損わnず、切目や破線
加工を施さすとも容易に引裂くことができ。When forming a pliable heat-sealable resin layer containing air bubbles on the surface of a thermoplastic foam sheet, even if stretched at a high magnification,
The resin layer does not have a mesh shape, so although the resulting film can be heat-sealed, it has poor tearability and cannot be easily torn, so it is necessary to cut or break it. be. On the other hand, in the film of the present invention obtained as described above, the heat-sealable resin layer has a network structure, so the tearability is not impaired and the film can be processed with cuts and broken lines. And can be easily torn.
かつヒートシールが可能である。And heat sealing is possible.
次に、添付図面によって本発明の詳細な説明すると、第
1図及び第2図は5本発明のノツチレスフィルムを製造
するための複合発泡シートの1例の構造を示す断面図及
び斜視図でちゃ、第3図は該複合シートを一軸方向に延
伸して得らnたノツチレスフィルムの斜視図である。図
において3はヒートシール性樹脂層lに内蔵する気泡、
4は熱可塑性発泡シート2中の気泡、1′は網目状とな
ったヒートシール性樹脂層を表わす。Next, the present invention will be explained in detail with reference to the accompanying drawings. FIGS. 1 and 2 are a cross-sectional view and a perspective view showing the structure of an example of a composite foam sheet for producing the knotless film of the present invention. FIG. 3 is a perspective view of a knotless film obtained by uniaxially stretching the composite sheet. In the figure, 3 indicates air bubbles built into the heat-sealable resin layer l;
Reference numeral 4 indicates air bubbles in the thermoplastic foam sheet 2, and reference numeral 1' indicates a heat-sealable resin layer having a mesh shape.
実施例 次に実施例によって本発明をさらに詳細に説明する。Example Next, the present invention will be explained in more detail with reference to Examples.
なお、複合発泡シートにおける熱可塑性発泡シート及び
ヒートシール性樹脂層の厚みは、該複合発泡シートの断
面を読取顕微鏡PRM−3(ピヵ精工株式会社製)で観
察し、そnぞn実測した。The thickness of the thermoplastic foam sheet and the heat-sealable resin layer in the composite foam sheet was measured by observing the cross section of the composite foam sheet with a reading microscope PRM-3 (manufactured by Pica Seiko Co., Ltd.). .
また、延伸加工後のフィルムのそnぞnの厚みについて
は、複合発泡シートにおけるそnぞれに対応する厚みを
延伸倍率で除して得らnた値を用いた。In addition, for each thickness of the film after stretching, the value obtained by dividing each corresponding thickness of the composite foam sheet by the stretching ratio was used.
実施例I
MF17.0のエチレン−プロピレン共重合体〔チッソ
■製、チッソポリグロF−8277) 100重量部に
、アゾジカルボアミド系発泡剤マスターベンツ
。Example I To 100 parts by weight of ethylene-propylene copolymer with MF17.0 (manufactured by Chisso ■, Chisso Polyglo F-8277), azodicarboxamide blowing agent Masterbenz was added.
.
ト〔三部化成■g、 セルーqイクMB−3013,A
DCjA20%含有物〕3重量部を添加して成る発泡シ
ート用熱可塑性樹脂組成物(以下シート用樹脂と称す)
と、エチレン−酢酸ビニル共重合体〔日本ユニカー味製
、 DQ、DJ−1830I(、VA含肩量1o%〕1
00重量部にアゾジカルボアミド系発泡剤マスターベレ
ット〔三方化成■製、セルマイクMB−3013、AD
C!A 20チ含育物)3重量部及び群青0.01重量
部を添加して成るヒートシール性を有する低融点樹脂組
成物(以下シール用樹脂と称する)とを、そnぞn別々
の押出機で混練し、次いでフィードブロックに導いて合
流させて、T−ダイスを介して積層されたシート状物を
押出す共押出成形法により、シール用樹脂層が表面にな
るようにした2種3層の複合発泡ノートラ得た。この複
合発泡シートの全厚みは0.75fimであり、シール
用樹脂層0 、025龍5発泡シート層0.70.m*
及びシール用樹脂層0.025f11であった。[Sanbe Kasei g, Celluqiku MB-3013,A
Thermoplastic resin composition for foamed sheets (hereinafter referred to as sheet resin) containing 3 parts by weight of 20% DCjA
and ethylene-vinyl acetate copolymer [manufactured by Nippon Unicar Aji, DQ, DJ-1830I (VA content 10%)] 1
00 parts by weight of azodicarboxamide blowing agent master pellet [manufactured by Sanpo Kasei ■, Cellmic MB-3013, AD
C! A low melting point resin composition with heat-sealing properties (hereinafter referred to as sealing resin) containing 3 parts by weight of ultramarine and 0.01 parts by weight of ultramarine was extruded separately. Type 2 and Type 3 are made by kneading them in a machine, then introducing them into a feed block, merging them, and extruding the laminated sheet materials through a T-die so that the sealing resin layer is on the surface. A layer of composite foam was obtained. The total thickness of this composite foam sheet is 0.75 fim, with a sealing resin layer of 0 and a 025 Dragon 5 foam sheet layer of 0.70 fim. m*
and the sealing resin layer was 0.025f11.
次に、このようにして得らCた複合発泡シートを110
℃の雰囲気中で横一軸方向に延伸加工を施し、厚さ0.
1511Eの横方向に容易に引裂くことのできる複合発
泡延伸フィルムを得た。この複合発泡延伸フィルムの表
面層を顕微鏡で観察したところ、積層した表面発泡層(
シール用樹脂層)の気泡が延伸加工により破nて1表面
層が網目状被膜になっていることが認めら井た。このも
のに通常のヒートシール加工を施したところ、実用域の
接着強度が得らルた。なお、この複合発泡延伸フィルム
の横方向の直角引裂強度は2.1に9/crIIであシ
、シート用樹脂層のみの発泡延伸フィルムのそnと同等
であった。Next, the composite foam sheet obtained in this way was heated to 110
It is stretched in the transverse uniaxial direction in an atmosphere at ℃ to a thickness of 0.
A composite expanded stretched film of 1511E which could be easily torn in the transverse direction was obtained. When the surface layer of this composite foam stretched film was observed under a microscope, the laminated surface foam layer (
It was observed that the air bubbles in the sealing resin layer were broken by the stretching process, and the first surface layer became a mesh-like film. When this material was subjected to a conventional heat sealing process, adhesive strength within the practical range was obtained. The transverse right angle tear strength of this composite foam stretched film was 2.1 to 9/crII, which was equivalent to that of the foam stretched film with only the sheet resin layer.
実施例2
実施例1におけるエチレン−酢酸ビニル共重合体の代り
に、変性ポリプロピレン樹脂[三片石油化学■製、タフ
マーXR−107L]を用いる以外は、実施例1と全く
同様にして複合発泡延伸フィルムを得た。Example 2 Composite foaming and stretching was carried out in the same manner as in Example 1, except that a modified polypropylene resin [Tafmer Got the film.
このものの性能全実施例1と同様にして調べたところ、
該フィルムの横方向の直角引裂強度は2.2に9 /
cmであり、またヒートシール性も実用上満足しうるも
のであった。The performance of this product was investigated in the same manner as in Example 1, and it was found that
The transverse right angle tear strength of the film is 2.2 to 9/
cm, and the heat sealability was also practically satisfactory.
実施例3
実施例1におけるエチレン−酢酸ビニル共重合体の代り
に、エチレン−メタクリル酸共重合体を亜鉛架橋して成
るアイオノマー[三井ポリケミカル■製、ハイミラ71
650、MFRl、5.5pGrO,94]を用いる以
外は、実施例1と全く同様にして複合発泡延伸フィルム
を得、同様の試験を行った。その結果、該フィルムの横
方向の直角引裂強度は2.4 K9 / cmで、引裂
きやすさを損うことなく、実用性のあるヒートシール強
度が得らnた。Example 3 Instead of the ethylene-vinyl acetate copolymer in Example 1, an ionomer made by zinc-crosslinking an ethylene-methacrylic acid copolymer [manufactured by Mitsui Polychemicals, Himira 71] was used.
650, MFRl, 5.5pGrO, 94], a composite expanded stretched film was obtained in exactly the same manner as in Example 1, and the same tests were conducted. As a result, the transverse right angle tear strength of the film was 2.4 K9/cm, and a practical heat seal strength was obtained without impairing tearability.
実施例4
MF工8.5のエチレン−プロピレン−ブテン共重合体
〔チッソ■製、チッソポリプロxy−75001100
重量部にアゾジカルボアミド系発泡剤マスターペレット
〔三協化成■製、セルマイクMB−3013゜ADCA
20チ含有物〕3重量部を添加して成るシート用樹脂
と、ヘキサ78%を含有させた低密度ポリエチレン〔日
本ユニカー■li!、 NUC−8505、M工0.8
. 5pGr O,923] 1100重量にアゾビス
イソブチロニトリル0.1重量部5重炭酸ナトリウム0
.1重量部及び群青0.01重量部を添加して成るシー
ル用樹脂をそ扛ぞ1別々の押出機で混練し、フィードブ
ロックに導いて合流させて、T−ダイスを介して積層さ
れたシート状物に押出す共押出成形法により、シール用
樹脂層が表面になるようにした2種3層の複合発泡シー
トを得た。Example 4 Ethylene-propylene-butene copolymer with MF engineering 8.5 [manufactured by Chisso ■, Chisso Polyproxy-75001100]
Part by weight is azodicarboxamide foaming agent master pellets [manufactured by Sankyo Kasei ■, Cellmic MB-3013゜ADCA]
20% of content] Sheet resin made by adding 3 parts by weight and low density polyethylene containing 78% of hexa [Nippon Unicar ■li! , NUC-8505, M engineering 0.8
.. 5 pGr O, 923] 1100 weight to 0.1 part by weight of azobisisobutyronitrile 5 Sodium bicarbonate 0
.. A sealing resin containing 1 part by weight and 0.01 part by weight of ultramarine was kneaded in separate extruders, led to a feed block and combined, and laminated through a T-die to form sheets. A composite foam sheet of two types and three layers with the sealing resin layer on the surface was obtained by a coextrusion molding method in which the sheet was extruded into a shape.
この複合発泡シートを実施例1と同様にして複合発泡延
伸フィルムとし、その性能を求めたところ、実施例1と
同様に表面層は網目状被膜であり、そのヒートシール性
は実用域に達しており、また直角引裂強度は被膜を施し
てない発泡シート層と同等で2.1に9/錆を示した。This composite foam sheet was made into a composite foam stretched film in the same manner as in Example 1, and its performance was determined. As in Example 1, the surface layer was a mesh film, and its heat sealability reached a practical level. In addition, the right angle tear strength was equivalent to that of the uncoated foam sheet layer, with a rating of 2.1 and 9/rust.
実施例5
MFエフ、0のエチレン−プロピレン共重合体〔チッソ
■M、チッソポリプロF−8277360重量部とエチ
レン−酢酸ビニル共重合体〔日本ユニカー■製、DQ、
DJ−1830H%VA I Q%含有〕40重量部と
の混合樹脂にアゾジカルボアミド系発泡剤マスターペレ
ット〔三協化成■製、セルマイクMB−3013、AD
CA 20%含有物〕3重量部を添加して成る発泡シー
ト用樹脂と、ヘキサ710%を含有させた直鎖線状ポリ
エチレン〔三井石油化学■製、ウルトゼツクス3520
. M工2.3. 5pGrO,9291100tt
部にアゾビスインブチロニトリル0.1重量部1重炭酸
ナトリウム0.1重量部及び群青0.01重量部を添加
して成るシール用樹脂をそ几ぞれ別々の押出機で混練し
、フィードブロック、T−ダイスを介して複合発泡シー
トを共押出法で成形し、2種3層の複合発泡シート用樹
脂た。Example 5 Ethylene-propylene copolymer of MF F, 0 [Chisso M, Chisso Polypro F-8277360 parts by weight and ethylene-vinyl acetate copolymer [manufactured by Nippon Unicar, DQ,
Mixed resin with DJ-1830H%VA IQ% containing 40 parts by weight and azodicarboxamide blowing agent master pellets [manufactured by Sankyo Kasei ■, Cellmic MB-3013, AD
20% CA content] Foamed sheet resin containing 3 parts by weight, and linear polyethylene containing 710% hexa [Mitsui Petrochemicals, Ultxex 3520]
.. M-engineer 2.3. 5pGrO, 9291100tt
0.1 part by weight of azobisinbutyronitrile, 0.1 part by weight of sodium bicarbonate, and 0.01 part by weight of ultramarine are kneaded in separate extruders. A composite foam sheet was molded by coextrusion through a feed block and a T-die to form two types and three layers of resin for a composite foam sheet.
この複合発泡シートを実施例1と同様にして複合発泡延
伸フィルムとし、その性能を求めたところ、シート用樹
脂層は実施例1と同様に網目状被膜となっており、該フ
ィルムの直角引裂強度は2、0 K9 / cmであっ
た。またこの複合発泡延伸フィルムのシール強度は実用
上有効なものであった。This composite foam sheet was made into a composite foam stretched film in the same manner as in Example 1, and its performance was determined. As in Example 1, the resin layer for the sheet was a mesh-like coating, and the right angle tear strength of the film was determined. was 2,0 K9/cm. Moreover, the seal strength of this composite expanded stretched film was practically effective.
実茄例6
実施例1と同様にして発泡シート層とシール樹脂層との
2種2層の複合発泡シーH共押出成形法により成形し横
一軸方向に延伸加工を施して厚さ0.15IIIIの複
合発泡延伸フィルムを得た。このフィルムの横方向の直
角引裂強度は2.1に51/αであり実施例1と全く同
等であった。また、ヒートシール性については、シール
用樹脂面同志接着している場合は実施例1と全く同等で
あるが、シール用樹脂面と発泡ベースフィルム面と接す
る場合はそのシール強度が実用域に達せず容易に剥離さ
ルる状態であった。Practical example 6 In the same manner as in Example 1, a composite foamed sheet H co-extrusion molded with two types and two layers of a foamed sheet layer and a sealing resin layer, and stretched in the transverse uniaxial direction to a thickness of 0.15III. A composite expanded stretched film was obtained. The transverse right angle tear strength of this film was 2.1 to 51/α, which was exactly the same as that of Example 1. In addition, regarding heat sealability, when the sealing resin surfaces are bonded together, it is exactly the same as Example 1, but when the sealing resin surface and the foamed base film surface are in contact, the sealing strength does not reach the practical level. It was in a state where it could be easily peeled off.
比較例I
M1rエフ、0のエチレン−プロピレン共重合体〔チッ
ソ■製、チッソポリプロF−82773100重量部に
ADCA系発泡マスターベレット(セルマイクMB−3
013)を3重量部添加して成るシート用樹脂をT−ダ
イ押出成形法により厚み0.75111の発泡シートに
成形した。この発泡シート’l実施例1と同様にして横
一軸方向に延伸加工し、厚さ0.15nの横方向引裂き
容易な発泡フィルムを得た。この発泡延伸フィルムの横
方向の直角引裂強度を測定した結果2.1 K9 /
cmであり実施例1と全く向−強度を示した。Comparative Example I M1r F, 0 ethylene-propylene copolymer [manufactured by Chisso ■, Chisso Polypro F-82773, 100 parts by weight, ADCA foam master pellet (Celmic MB-3
A sheet resin containing 3 parts by weight of 013) was molded into a foamed sheet with a thickness of 0.75111 mm by T-die extrusion. This foamed sheet was stretched in the transverse uniaxial direction in the same manner as in Example 1 to obtain a foamed film having a thickness of 0.15 nm and easily torn in the transverse direction. The result of measuring the right angle tear strength in the transverse direction of this expanded stretched film was 2.1 K9/
cm, and exhibited a strength that was completely different from that of Example 1.
しかし、この発泡延伸フィルムのヒートシール性は悪く
、全く抵抗なく剥離する状態で実用強度は得らnなかっ
た。However, the heat-sealability of this expanded stretched film was poor, and it could be peeled off without any resistance, and no practical strength was obtained.
比較例2
実施例1におけるヒートシール性を育する低融点樹脂組
成物の中の発泡剤組成を徐いて実施例1と同様の試験を
行ったが、得らnた複合発泡延伸フィルムの横方向の直
角引裂強度が5.3に?/αとなり1発泡延伸フィルム
の引裂性が損わnでいるのみならず、積層したエチレン
、酢酸ビニル共重合体の被膜が発泡延伸のベースフィル
ムが破壊しても容易に引裂くことができなかった。Comparative Example 2 A test similar to that of Example 1 was conducted except that the blowing agent composition in the low melting point resin composition that promotes heat sealability in Example 1 was omitted. The right angle tear strength of 5.3? /α, 1 Not only did the tearability of the foamed stretched film deteriorate (n), but the laminated ethylene/vinyl acetate copolymer coating could not be easily torn even if the foamed stretched base film was destroyed. Ta.
比較例3
実施例1のシール用樹脂中のエチレン−酢酸ビニル共重
合体の代りにアイオノマー樹脂(ハイミラン1650)
に置き替えて、実施例1と同様にして共押出成形法でシ
ール用樹脂層の厚みを0.05nとして実施例3のシー
ル用樹脂層の厚みの2倍に成形し、この複合発泡7−ト
を実施例3と同様に横一軸方向に延伸して複合発泡フィ
ルムを得た。Comparative Example 3 Ionomer resin (Himilan 1650) was used instead of the ethylene-vinyl acetate copolymer in the sealing resin of Example 1.
, the sealing resin layer was formed to have a thickness of 0.05n, twice the thickness of the sealing resin layer of Example 3, using the coextrusion molding method in the same manner as in Example 1, and this composite foamed 7- The composite foamed film was stretched in the transverse uniaxial direction in the same manner as in Example 3 to obtain a composite foamed film.
このフィルムの横方向の直角引裂強度は3.8であり、
そのシール用樹脂層を顕微鏡で観察したところ、シール
用向脂発泡層の気泡が破壊さnずその被膜は網目状でな
く完全なスポンジ状であった。The transverse right angle tear strength of this film is 3.8,
When the sealing resin layer was observed under a microscope, it was found that the bubbles in the sealing anti-lipid foam layer were not destroyed and the coating was not mesh-like but completely sponge-like.
この複合発泡フィルムはヒートシール性には問題がない
が1手で引裂くことは不可能ではないがかなり抵抗があ
り、容易に引裂くためには「切υ目」又は「破線」を施
す必要があり本発明の目的に適合しないものであった。This composite foam film has no problems with heat sealability, but it is not impossible to tear it with one hand, but it is quite resistant, and it is necessary to make "cuts" or "dashed lines" in order to tear it easily. Therefore, it was not suitable for the purpose of the present invention.
以上の結果を次表にまとめて示す。The above results are summarized in the table below.
発明の効果
不発明のノツチレスフィルムは一軸方向に延伸された熱
可塑性発泡フィルムの片面又は両面に、網目構造をMす
るヒートシール性樹脂層を設けたものであって、優れた
緩衝性及び断熱性を有し。Effects of the Invention The inventive knotless film has a heat-sealable resin layer with a mesh structure on one or both sides of a uniaxially stretched thermoplastic foam film, and has excellent cushioning properties and heat insulation. have sex.
かつヒートシールが容易である上に易引裂性であるので
、切り目や破線加工を施さすとも容易に手で引裂くこと
ができるし、また、外観上はほとんど発泡性が見分けら
nないほど平滑であって、印刷などの加工がなんら問題
なく行えるので、包装材料として極めて有用である。In addition, it is easy to heat seal and tear easily, so even if it is cut or broken, it can be easily torn by hand, and its appearance is so smooth that you can hardly tell that it is foaming. Since it can be processed such as printing without any problems, it is extremely useful as a packaging material.
第1図及び第2図は1本発明のノツチレスフィルムの製
造に用いる複合発泡シートの1例の断面図及び斜視図、
第3図は該複合シートを一軸方向に延伸して得ら几たノ
ツチレスフィルムの斜視図である。
図中符号1は気泡を金屑したヒートシール性樹脂層、2
は熱可塑性発泡シート、1′は網目状になつたヒートシ
ール性樹脂層である。1 and 2 are a cross-sectional view and a perspective view of an example of a composite foam sheet used for manufacturing the knotless film of the present invention,
FIG. 3 is a perspective view of a knotless film obtained by uniaxially stretching the composite sheet. In the figure, reference numeral 1 indicates a heat-sealable resin layer containing air bubbles and gold dust, and 2
1 is a thermoplastic foam sheet, and 1' is a heat-sealable resin layer in the form of a mesh.
Claims (1)
くとも片面に、網目構造を有するヒートシール性樹脂層
を、その樹脂量が該発泡フィルム1m^2当り2〜8c
cになるような厚みで設けて成る易引裂性ノッチレスフ
ィルム。 2 熱可塑性発泡シートの少なくとも片面に、気泡を含
有したヒートシール性樹脂層を、その樹脂量が延伸後の
発泡フィルム1m^2当り2〜8ccになるような厚み
で設け、次いでこの複合シートを一軸方向に延伸加工し
て該ヒートシール性樹脂層を網目構造となすことを特徴
とする易引裂性ノッチレスフィルムの製造方法。[Claims] 1. A heat-sealable resin layer having a network structure is provided on at least one side of a thermoplastic foam film stretched in the uniaxial direction, and the amount of the resin is 2 to 8 c per 1 m^2 of the foam film.
An easily tearable notchless film provided with a thickness of c. 2. A heat-sealable resin layer containing air bubbles is provided on at least one side of the thermoplastic foam sheet to a thickness such that the resin amount is 2 to 8 cc per 1 m^2 of the stretched foam film, and then this composite sheet is A method for producing an easily tearable notchless film, comprising forming the heat-sealable resin layer into a network structure by stretching in a uniaxial direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4589586A JPS62202729A (en) | 1986-03-03 | 1986-03-03 | Notch-less film and manufacture thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4589586A JPS62202729A (en) | 1986-03-03 | 1986-03-03 | Notch-less film and manufacture thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62202729A true JPS62202729A (en) | 1987-09-07 |
JPH0258099B2 JPH0258099B2 (en) | 1990-12-06 |
Family
ID=12731977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4589586A Granted JPS62202729A (en) | 1986-03-03 | 1986-03-03 | Notch-less film and manufacture thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62202729A (en) |
-
1986
- 1986-03-03 JP JP4589586A patent/JPS62202729A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0258099B2 (en) | 1990-12-06 |
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