JPH0725920B2 - Wrapping sheet - Google Patents
Wrapping sheetInfo
- Publication number
- JPH0725920B2 JPH0725920B2 JP17809687A JP17809687A JPH0725920B2 JP H0725920 B2 JPH0725920 B2 JP H0725920B2 JP 17809687 A JP17809687 A JP 17809687A JP 17809687 A JP17809687 A JP 17809687A JP H0725920 B2 JPH0725920 B2 JP H0725920B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- density polyethylene
- present
- packaging
- 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
- 229920001684 low density polyethylene Polymers 0.000 claims description 18
- 239000004702 low-density polyethylene Substances 0.000 claims description 18
- 238000004806 packaging method and process Methods 0.000 claims description 18
- 239000006260 foam Substances 0.000 claims description 12
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 10
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 9
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000005187 foaming Methods 0.000 description 5
- 239000004088 foaming agent Substances 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- PMPVIKIVABFJJI-UHFFFAOYSA-N Cyclobutane Chemical compound C1CCC1 PMPVIKIVABFJJI-UHFFFAOYSA-N 0.000 description 1
- LVZWSLJZHVFIQJ-UHFFFAOYSA-N Cyclopropane Chemical compound C1CC1 LVZWSLJZHVFIQJ-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- XOBKSJJDNFUZPF-UHFFFAOYSA-N Methoxyethane Chemical compound CCOC XOBKSJJDNFUZPF-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- -1 aliphatic ethers Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 238000012690 ionic polymerization Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 235000013847 iso-butane Nutrition 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229940050176 methyl chloride Drugs 0.000 description 1
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical group 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Landscapes
- Wrappers (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は包装用シートに関し、詳しくは被包装物を包装
した際に緩衝性に富みしかも被包装物に対する密着性が
良好であり、優れた包装が行える合成樹脂発泡体製の包
装用シートに関する。Description: TECHNICAL FIELD The present invention relates to a packaging sheet, and more specifically, it has excellent cushioning properties when a packaged object is packaged, and has good adhesion to the packaged object, which is excellent. The present invention relates to a packaging sheet made of synthetic resin foam capable of packaging.
箱詰めする収納物の個々を包装用シートにより被覆包装
して箱詰めすることが行われており、この様な包装用シ
ートとして永年紙が使用されてきたが、合成樹脂関連技
術の発達により近年合成樹脂製の包装用シートが使用さ
れている。これら合成樹脂製の包装用シートとして、柔
軟性が優れておりしかも緩衝性もあるという理由から低
密度ポリエチレン発泡シートが使用に供されている。
又、この種シートとして低密度ポリエチレン発泡シート
の機械的強度をより向上したものが提案されており、こ
の様なものとして低密度ポリエチレンと線状低密度ポリ
エチレンとのブレンド樹脂を架橋、発泡させた架橋ポリ
エチレン系樹脂発泡体シートが知られている（特公昭61
−57334号）。It has been practiced to cover and package individual items to be boxed with a wrapping sheet, and paper has been used for many years as such a wrapping sheet. Made of packaging sheets are used. As a packing sheet made of these synthetic resins, a low-density polyethylene foam sheet is used because it has excellent flexibility and also has a buffer property.
Further, as this kind of sheet, a sheet having further improved mechanical strength of a low-density polyethylene foam sheet has been proposed. As such, a blend resin of low-density polyethylene and linear low-density polyethylene is crosslinked and foamed. A cross-linked polyethylene resin foam sheet is known (Japanese Patent Publication No. 61)
-57334).
しかしながら、従来のこの種シートにあっては被包装材
との密着性に問題点が存在していた。即ち、被包装材を
包装用シートで包装した場合、シートにもとに戻る力が
働き、きれいな包装が出来ないという問題があった。However, the conventional sheet of this type has a problem in the adhesion to the material to be packaged. That is, when the material to be packaged is wrapped with a packaging sheet, there is a problem in that the force of returning to the original sheet acts and a clean packaging cannot be performed.
本発明はこの様な欠点に鑑み、被包装物との密着性が良
好でしかも、緩衝性、強度にも優れた包装用シートを提
供することを目的とするものである。In view of such drawbacks, it is an object of the present invention to provide a packaging sheet which has good adhesiveness to an article to be packaged and which is also excellent in cushioning property and strength.
本発明者等は被包装物との密着性の良否がシートの厚
さ、滑り抵抗、発泡倍率等により大きく影響を受けるこ
とを突き止め、これらを種々検討して本発明を完成する
に至った。The inventors of the present invention found out that the quality of the adhesion to the object to be packaged is greatly affected by the thickness of the sheet, the slip resistance, the expansion ratio, etc., and variously studied these matters to complete the present invention.
従来のこの種のシートの厚さは例えば1mm或いは2mmとい
う様に比較的厚いものが使用されており、この様な厚さ
のものでは充分なる密着性を得ることができない。そこ
で、種々検討の結果、厚さが0.4mm未満のものが充分な
る密着性が得られることを発見した。しかしながら、従
来の低密度ポリエチレン発泡シートでは機械的強度に劣
るため、この様な薄物を成形すると、シートに破断部分
が生じたりする等の不具合が生じ好ましくない。そこ
で、本発明では、機械的強度の改良された線状低密度ポ
リエチレン（以下LLDPEという）と分岐低密度ポリエチ
レン（以下LDPEという）との混合樹脂発泡体からなると
いう構成を有するものであるが、この混合樹脂発泡体シ
ートであってもLLDPEが10〜70重量％とLDPEが90〜30重
量％とからなる混合樹脂発泡体である必要がある。LLDP
Eが30重量％未満、即ちLDPEが70重量％を越えた場合に
は抗張力に劣り、シート製造時に引き取り速度を上げる
ことができず、本発明の如くの薄物を製造することがで
きない。一方、LLDPEが70重量％を越えた、即ち、LDPE
が30重量％未満の場合は、得られるシートは緩衝効果の
劣る連泡となったり、一部発泡しなかったり、いわゆる
ヤケ等が発生したりし、緩衝材として使用し得ないもの
となる。Conventionally, this type of sheet has a relatively thick thickness of, for example, 1 mm or 2 mm, and such a thickness cannot provide sufficient adhesion. Then, as a result of various studies, it was discovered that a film having a thickness of less than 0.4 mm can provide sufficient adhesion. However, since the conventional low-density polyethylene foam sheet is inferior in mechanical strength, molding such a thin material causes problems such as breakage of the sheet, which is not preferable. Therefore, in the present invention, a linear low density polyethylene with improved mechanical strength (hereinafter referred to as LLDPE) and a branched low density polyethylene (hereinafter referred to as LDPE) is composed of a mixed resin foam, Even this mixed resin foam sheet needs to be a mixed resin foam composed of 10 to 70% by weight of LLDPE and 90 to 30% by weight of LDPE. LLDP
When E is less than 30% by weight, that is, LDPE exceeds 70% by weight, the tensile strength is inferior, the take-up speed cannot be increased during the sheet production, and the thin product as in the present invention cannot be produced. On the other hand, LLDPE exceeds 70% by weight, that is, LDPE
When the content is less than 30% by weight, the obtained sheet becomes an open cell having an inferior cushioning effect, does not partially foam, or causes so-called scorch, and cannot be used as a cushioning material.
本発明において用いられる低密度ポリエチレンとは、高
圧下のラジカル重合反応により製造される不規則な長鎖
分岐を有する従来汎用されている通常の低密度ポリエチ
レンであって、密度0.91〜0.93g/cm3、メルトインデッ
クス１〜10g/10分のものが好ましい。The low-density polyethylene used in the present invention is a conventional low-density polyethylene that is conventionally used and has an irregular long chain branching produced by a radical polymerization reaction under high pressure, and has a density of 0.91 to 0.93 g / cm 3. 3 , those having a melt index of 1 to 10 g / 10 minutes are preferable.
本発明において用いられる線状低密度ポリエチレンと
は、例えば中低圧下のイオン重合反応により、エチレン
にプロピレン、ブテン−１、ペンテン−１、ヘキセン−
１、オクテン−１・４−メチルペンテン−１等のα−オ
レフィンを少量（約１〜10モル％）共重合させることに
より、直鎖状の幹ポリマーに適当数の短鎖分岐を導入
し、それにより密度を通常の高圧法低密度ポリエチレン
の範囲まで低下させたポリマーであり、密度0.915〜0.9
4g/cm3、メルトインデックス0.5〜50g/10分のものが好
ましく、より好ましくはメルトインデックスが1.0〜10.
0g/10分のものであり、例えばUltzer−3021F,2020L（三
井油化学（株）製）、DNGA7342,GRS7345（ユニオンカー
バイト社製）等が上げられる。The linear low-density polyethylene used in the present invention means, for example, propylene, butene-1, pentene-1, hexene-to ethylene by an ionic polymerization reaction under medium and low pressure.
1, a small amount (about 1 to 10 mol%) of an α-olefin such as octene-1 .4-methylpentene-1 is copolymerized to introduce an appropriate number of short chain branches into a linear trunk polymer, It is a polymer whose density is reduced to the range of ordinary high pressure low density polyethylene, and has a density of 0.915 to 0.9.
Those having a melt index of 4 g / cm 3 and a melt index of 0.5 to 50 g / 10 minutes are preferable, and more preferably a melt index of 1.0 to 10.0.
For example, Ultzer-3021F, 2020L (manufactured by Mitsui Oil Chemicals Co., Ltd.), DNGA7342, GRS7345 (manufactured by Union Carbite Co., Ltd.) and the like are listed.
シートが上記した構成を有していても、滑り抵抗が小さ
いと密着性に劣ることとなり、良好な包装を行い難いた
め、本発明ではシートの静摩擦係数が1.0以上である必
要がある。本発明における静摩擦係数とは、新東科学
（株）製の摩擦係数測定機（TYPE HEIDON−10）を使用
し傾斜する平面板上及び移動ブロック底面に同一シート
材料を固定して測定されたものである。ただし、移動ブ
ロックの重量は200g、移動ブロックの底接触面積は24cm
2、平面板の速度は8mm/sec気温は25℃、そして雰囲気の
相対湿度は60％測定される。Even if the sheet has the above-mentioned structure, if the slip resistance is small, the adhesion becomes poor and it is difficult to perform good packaging. Therefore, in the present invention, the static friction coefficient of the sheet needs to be 1.0 or more. The static friction coefficient in the present invention is measured by using a friction coefficient measuring machine (TYPE HEIDON-10) manufactured by Shinto Kagaku Co., Ltd. and fixing the same sheet material on the inclined flat plate and the moving block bottom surface. Is. However, the moving block weighs 200 g, and the moving block bottom contact area is 24 cm.
2. The speed of the flat plate is 8mm / sec, the temperature is 25 ℃, and the relative humidity of the atmosphere is 60%.
シートの静摩擦係数が上記数値を満たすためにはシート
を製造する際の引き取り速度等を調整することにより行
うことができる（これらはシートの厚さを設定するため
にも関係してくるものである）。この場合の引き取り速
度としては30〜130m/min程度である。In order for the static friction coefficient of the sheet to satisfy the above-mentioned value, it can be done by adjusting the take-up speed, etc. at the time of manufacturing the sheet (these are also related to setting the thickness of the sheet. ). The take-up speed in this case is about 30 to 130 m / min.
特に上記引き取り速度にてシートを引き取った場合に
は、得られるシートの平滑性が高まる。従って、この様
なシートを用いて物品を包み込むと、両者の新の接触面
積が大きいため、極めて密着性能が高まる。In particular, when the sheet is taken at the above take-up speed, the smoothness of the obtained sheet is improved. Therefore, when an article is wrapped with such a sheet, the new contact area between the two is large, and thus the adhesion performance is extremely improved.
又、密着性を良好ならしめる為にはシートの折り曲げ性
能が良くなければならず、本発明ではシートを構成する
発泡体の発泡倍率が10倍以上である必要がある。Further, in order to obtain good adhesion, the folding property of the sheet must be good, and in the present invention, the foaming ratio of the foam constituting the sheet must be 10 times or more.
発泡倍率が10倍未満ではシートの折り曲げ性能に劣り、
その結果被包装物との密着性を減じる。又、本発明シー
トは厚みが極薄く構成されているため10倍未満という発
泡倍率の小さいものでは緩衝性を維持できなくなる。If the expansion ratio is less than 10 times, the bending performance of the sheet is poor,
As a result, the adhesion with the object to be packaged is reduced. Further, since the sheet of the present invention has an extremely thin thickness, the cushioning property cannot be maintained if the sheet has a small expansion ratio of less than 10 times.
この様に本発明では特定の樹脂組成、厚さ、静摩擦係
数、発泡倍率を併せ持つことにより初めて課題を解決す
ることのできる優れた包装用シートを提供できるもので
ある。As described above, the present invention can provide an excellent packaging sheet that can solve the problems only by having a specific resin composition, thickness, static friction coefficient, and expansion ratio.
即ち、本発明包装用シートは線状低密度ポリエチレン10
〜70重量％と、分岐低密度ポリエチレン90〜30重量％と
からなる混合樹脂発泡体からなる包装用シートであっ
て、厚さ0.4mm、静摩擦係数が1.0以上、発泡倍率が10倍
以上であるという構成を有するものである。That is, the packaging sheet of the present invention is a linear low density polyethylene 10
A packaging sheet made of a mixed resin foam consisting of ~ 70% by weight and branched low density polyethylene 90 ~ 30% by weight, having a thickness of 0.4 mm, a static friction coefficient of 1.0 or more, and a foaming ratio of 10 times or more. It has the following configuration.
本発明包装用シートを製造するに当たっては種々の方法
が考えられるが、その１例を以下に挙げる。しかしなが
ら、製造方法はこれに限定されるものではない。Various methods are conceivable for producing the packaging sheet of the present invention, one example of which is given below. However, the manufacturing method is not limited to this.
線状低密度ポリエチレン及び低密度ポリエチレンの樹脂
に発泡剤、要すれば発泡助剤及び／又は他の添加剤を加
え、押出機内で溶融混練した後、押出機の先端に位置す
るサーキュラーダイより常圧の雰囲気中に連続的に押出
すとともに引き取ることにより連続的に製造することが
できる。A linear low-density polyethylene and a resin of low-density polyethylene are added with a foaming agent, if necessary a foaming aid and / or other additives, melt-kneaded in an extruder, and then a circular die located at the tip of the extruder It can be continuously produced by continuously extruding and taking out in a pressure atmosphere.
発泡剤としては、−45〜＋75℃の範囲の沸点を有する常
態でガス状又は液状の有機化合物であって、例えばプロ
パン、ｎ−ブタン、iso−ブタン、シクロプロパン、シ
クロブタンの如き飽和炭化水素類や、ブテン、イソブチ
レン、ブタジエンの如き不飽和炭化水素類、ジメチルエ
ーテル、メチルエチルエーテル、ジエチルエーテル、メ
チルビニルエーテルの如き脂肪族のエーテル類や、フラ
ンの如き環状エーテル類、アセトンの如きケトン類、酢
酸メチルの如きエステル類、及び塩化メチルの如き塩素
化炭化水素類などである。The foaming agent is an organic compound which is a gas or liquid in a normal state and has a boiling point in the range of -45 to + 75 ° C, and saturated hydrocarbons such as propane, n-butane, iso-butane, cyclopropane and cyclobutane. And unsaturated hydrocarbons such as butene, isobutylene and butadiene, aliphatic ethers such as dimethyl ether, methyl ethyl ether, diethyl ether and methyl vinyl ether, cyclic ethers such as furan, ketones such as acetone, methyl acetate And esters such as chlorinated hydrocarbons such as methyl chloride.
又、発泡助剤としては、クレー、タルク、シリカ等の押
出機中の樹脂の加熱温度では溶融しない固体微粉末、或
いは加熱温度で分解または化学変化を起こしてガスを発
生することのできる１種又は２種以上の従来発泡成形に
使用されている化学発泡剤を使用することができる。Further, as the foaming aid, solid fine powder which does not melt at the heating temperature of the resin in the extruder such as clay, talc, silica or the like, or one which can decompose or chemically change at the heating temperature to generate gas Alternatively, two or more kinds of chemical foaming agents conventionally used in foam molding can be used.
本発明包装用シートは、密着性が良好でしかも緩衝性、
強度にも優れたものであり、箱詰め用の内容物の包装等
に有用に種々適用できるものである。The packaging sheet of the present invention has a good adhesiveness and a buffering property,
It is also excellent in strength and can be usefully applied to various things such as packaging of contents for boxing.
以下、本発明を実施例及び比較例を挙げて詳細に説明す
る。Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples.
実施例１〜3,比較例１〜３ 密度0.920g/cm3、MIが2.0g/10分の第１表に示す量のLLD
PEと密度が0.920g/cm3、MIが0.3g/10分の第１表に示す
量のLDPEからなる樹脂100重量部に、1.0重量部のタルク
（発泡助剤）及び第１表に示す量のブタン（発泡剤）を
添加し、押出機内でこれらを溶融混練した後、クリアラ
ンス0.07mmのサーキュラーダイより常圧の雰囲気中に連
続的に押出す（吐出量70kg/hr）とともに第１表の示す
引っ張り速度で引き取り、シートを製造した。得られた
シートの性状、厚さ、発泡倍率、静摩擦係数、被包装剤
との密着性を第１表に併せて示す。Examples 1-3, Comparative Examples 1-3 Density 0.920 g / cm 3 , MI 2.0 g / 10 min LLD in the amount shown in Table 1
100 parts by weight of resin consisting of PE, density of 0.920 g / cm 3 , MI of 0.3 g / 10 min LDPE, 1.0 part by weight of talc (foaming aid) and shown in Table 1. Amount of butane (foaming agent) was added, these were melted and kneaded in the extruder, and then continuously extruded from a circular die with a clearance of 0.07 mm into an atmosphere of normal pressure (discharge rate 70 kg / hr) and Table 1 The sheet was manufactured by pulling at the pulling speed indicated by. The properties, thickness, expansion ratio, coefficient of static friction, and adhesion to the packaged material of the obtained sheet are also shown in Table 1.
比較例４ 実施例１のLLDPEとLDPEの代わりに密度0.920g/cm3、MI
0.3g/10分の第１表に示す量のLDPEを使用した以外は実
施例１と同様にシートを得た（ただし吐出量は100kg/h
r）。得られたシートの性状、厚さ、発泡倍率、静摩擦
係数、被包装剤との密着性を第１表に併せて示す。Comparative Example 4 Instead of LLDPE and LDPE of Example 1, a density of 0.920 g / cm 3 , MI
A sheet was obtained in the same manner as in Example 1 except that the amount of LDPE shown in Table 1 of 0.3 g / 10 min was used (however, the discharge rate was 100 kg / h.
r). The properties, thickness, expansion ratio, coefficient of static friction, and adhesion to the packaged material of the obtained sheet are also shown in Table 1.
〔発明の効果〕 以上説明した様に本発明包装用シートは、特定の樹脂組
成、厚さ、静摩擦係数、発泡倍率を有するため、被包装
物に対し極めて密着性の良い包装が行え、しかも緩衝
性、強度を兼ね備え、優れた包装が行えるものである。 [Effects of the Invention] As described above, the packaging sheet of the present invention has a specific resin composition, thickness, coefficient of static friction, and expansion ratio, so that it can be packaged with extremely good adhesion to the object to be packaged, and also has a cushioning effect. It has both excellent properties and strength, and can perform excellent packaging.
Claims (1)
低密度ポリエチレン90〜30重量％とからなる混合樹脂発
泡体からなる包装用シートであって、厚さ0.4mm未満、
静摩擦係数が1.0以上、発泡倍率が10倍以上であること
を特徴とする包装用シート。1. A linear low density polyethylene of 10 to 70% by weight,
A packaging sheet made of a mixed resin foam composed of 90 to 30% by weight of low-density polyethylene, having a thickness of less than 0.4 mm,
A packaging sheet having a static friction coefficient of 1.0 or more and an expansion ratio of 10 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17809687A JPH0725920B2 (en) | 1987-07-16 | 1987-07-16 | Wrapping sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17809687A JPH0725920B2 (en) | 1987-07-16 | 1987-07-16 | Wrapping sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6422937A JPS6422937A (en) | 1989-01-25 |
| JPH0725920B2 true JPH0725920B2 (en) | 1995-03-22 |
Family
ID=16042571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17809687A Expired - Fee Related JPH0725920B2 (en) | 1987-07-16 | 1987-07-16 | Wrapping sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0725920B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323676B (en) * | 2003-07-07 | 2013-03-27 | 陶氏环球技术有限责任公司 | Thin foamed polyethylene sheets and manufacture method thereof |
-
1987
- 1987-07-16 JP JP17809687A patent/JPH0725920B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6422937A (en) | 1989-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2288686C (en) | Ethylene copolymer composition and use thereof | |
| US4671987A (en) | Printable composite stretch wrap film | |
| CN102753615B (en) | Photodegradable films with good tensile and dart properties | |
| US4311808A (en) | Cling film composition of olefin polymer blend | |
| US4649001A (en) | Process for producing polyethylene extruded foams | |
| EP0198091B1 (en) | Film for stretch wrapping | |
| RU2368507C2 (en) | Packing material with polyolefin foam layer | |
| CA2303590A1 (en) | An olefinic resin composition and their moldings | |
| US6232402B1 (en) | Films based on three component polyolefin blend | |
| EP1591482A4 (en) | RESIN COMPOSITION HAVING AN EASY-TO-OPEN PROPERTY AND USE THEREOF | |
| CA2288684A1 (en) | Uses of ethylene/.alpha.-olefin copolymer and uses of ethylene copolymer composition | |
| EP2666631B1 (en) | Stretch packaging film | |
| US4529764A (en) | Olefin polymers containing amides and inorganics | |
| JPH0725920B2 (en) | Wrapping sheet | |
| JPS6232214B2 (en) | ||
| KR960700296A (en) | Linear Low Density Polyethylene Film | |
| US5859138A (en) | Polymer blends | |
| JPS647095B2 (en) | ||
| JPS6341945B2 (en) | ||
| JPS60163949A (en) | Polypropylene composition | |
| EP2918409B1 (en) | Stretch wrapping film | |
| JPS59143613A (en) | Polypropylene sheet for packing of press-through pack | |
| JP2894120B2 (en) | Stretch wrap multilayer film | |
| JPH0423655B2 (en) | ||
| JP3360532B2 (en) | Thermoforming resin composition and sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |