JPH06345880A - Tubular film for food stretching use - Google Patents

Tubular film for food stretching use

Info

Publication number
JPH06345880A
JPH06345880A JP13462493A JP13462493A JPH06345880A JP H06345880 A JPH06345880 A JP H06345880A JP 13462493 A JP13462493 A JP 13462493A JP 13462493 A JP13462493 A JP 13462493A JP H06345880 A JPH06345880 A JP H06345880A
Authority
JP
Japan
Prior art keywords
tubular film
stretch
weight
elongation recovery
vinyl acetate
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.)
Pending
Application number
JP13462493A
Other languages
Japanese (ja)
Inventor
Kozaburo Toshima
耕三郎 戸島
Takayuki Kusu
隆之 久須
Tsutomu Hagisako
勉 萩迫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP13462493A priority Critical patent/JPH06345880A/en
Publication of JPH06345880A publication Critical patent/JPH06345880A/en
Pending legal-status Critical Current

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  • Package Frames And Binding Bands (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

PURPOSE:To provide the subject tough and highly extensible film excellent in stretch recovery rate and stretch recovery force. CONSTITUTION:The objective tubular film ca.3.0 in blow ratio, 2,000mm in folded width and 70mum in thickness can be obtained by inflation method using a formulated feedstock prepared by incorporating 100 pts.wt. of EVA (vinyl acetate content: 5wt.%; MI: 0.3) with 2 pts.wt. of a slip agent master batch (5% in concentration) and 4 pts.wt. of an antistatic agent master batch (6% in concentration).

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、強靱でよく伸び、且
つ、伸長回復率及び伸長回復力に優れたフッドストレッ
チ用チューブ状フィルムに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular film for a hood stretch, which is tough, stretches well, and is excellent in elongation recovery and elongation recovery.

【0002】[0002]

【従来の技術】近年、貨物をパレットにのせたものの上
に、パレット貨物よりも小さなチューブ状フィルムを4
周方向に引き伸ばしてすぐ被せ、貨物をパレットととも
に結束するパレットストレッチ包装システムが注目され
ている。
2. Description of the Related Art In recent years, a tube-shaped film smaller than a palletized cargo is placed on a palletized cargo.
The pallet stretch wrapping system, which stretches in the circumferential direction and covers it immediately, binds the cargo together with the pallet.

【0003】従来、このパレットストレッチ包装システ
ムに用いるフッドストレッチ用チューブ状フィルムとし
ては、低密度ポリエチレンや直鎖状低密度ポリエチレン
からなるものが採用されている。
Conventionally, as a tubular film for hood stretch used in this pallet stretch packaging system, a film made of low density polyethylene or linear low density polyethylene has been adopted.

【0004】しかし、このような従来のフッドストレッ
チ用チューブ状フィルムは、伸長回復率が不足してお
り、充分に引き伸ばした状態にて、パレット上に貨物を
のせたものの上に被せた場合、貨物をパレットとともに
結束できる寸法まで復元させることができず、又、引き
伸ばし方を少なくすると、包装機設計上支障をきたし、
安定した運転を行うことができず、又、伸長回復力が不
足しており、特に重量貨物をパレットに結束して固定す
る力が弱いという問題点がある。
However, such a conventional tubular film for a hood stretch has an insufficient elongation recovery rate, and when the pallet is placed on a pallet in a sufficiently stretched state, the cargo is Can not be restored to a size that can be bound with the pallet, and if the stretching method is reduced, the packaging machine design will be hindered,
There is a problem that stable operation cannot be performed and extension recovery force is insufficient, and particularly the force for binding and fixing heavy cargo on the pallet is weak.

【0005】[0005]

【発明が解決しようとする課題】本発明は、上記の如き
従来の問題点を解消し、強靱でよく伸び、且つ、伸長回
復率及び伸長回復力に優れたフッドストレッチ用チュー
ブ状フィルムを提供することを目的としてなされたもの
である。
DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a tubular film for a hood stretch, which is tough, has good elongation, and has excellent elongation recovery and elongation recovery. It was made for the purpose.

【0006】[0006]

【課題を解決するための手段】本発明は、酢酸ビニル含
有量5〜15重量%、メルトインデックス4以下のエチ
レン─酢酸ビニル共重合体からなるフッドストレッチ用
チューブ状フィルムであって、伸長回復率80%以上、
且つ、伸長回復力70kg/cm2 以上であるフッドス
トレッチ用チューブ状フィルムである。
DISCLOSURE OF THE INVENTION The present invention relates to a tubular film for a hood stretch comprising an ethylene-vinyl acetate copolymer having a vinyl acetate content of 5 to 15% by weight and a melt index of 4 or less, and having an elongation recovery rate. 80% or more,
Further, it is a tubular film for hood stretch which has an elongation recovery force of 70 kg / cm 2 or more.

【0007】本発明において用いる、エチレン─酢酸ビ
ニル共重合体(以下、EVAという)は、酢酸ビニル含
有量5〜15重量%、メルトインデックス(以下、MI
という)4以下である必要がある。酢酸ビニル含有量が
5重量%未満の場合には、伸長回復率が小さく、逆に、
15重量%を超える場合には、伸長回復率が満足できて
も、伸長回復力が不足する。MIが4を超える場合に
は、伸長回復率が満足できても、伸長回復力が不足す
る。
The ethylene-vinyl acetate copolymer (hereinafter referred to as EVA) used in the present invention has a vinyl acetate content of 5 to 15% by weight and a melt index (hereinafter referred to as MI).
It must be 4 or less. When the vinyl acetate content is less than 5% by weight, the elongation recovery rate is small, and conversely,
When it exceeds 15% by weight, the elongation recovery is insufficient even if the elongation recovery is satisfied. When MI exceeds 4, the elongation recovery is insufficient even if the elongation recovery rate is satisfied.

【0008】本発明において、EVA中には、必要に応
じて、スリップ剤を0.08〜0.20重量%添加する
と、滑り性を付与することができるので好適である。ス
リップ剤としては、例えば、三井石油化学社製、商品名
「SQ3」(スリップ剤濃度5%マスターバッチ)が挙
げられる。
In the present invention, it is preferable to add a slip agent in EVA in an amount of 0.08 to 0.20% by weight, if necessary, because slipperiness can be imparted. As the slip agent, for example, trade name “SQ3” (master batch of slip agent concentration 5%) manufactured by Mitsui Petrochemical Co., Ltd. can be mentioned.

【0009】本発明において、EVA中には、必要に応
じて、帯電防止剤を0.2〜0.4重量%添加すると、
帯電防止性を付与することができるので好適である。帯
電防止剤としては、例えば、理研ビタミン社製、商品名
「EAR2」(帯電防止剤濃度6%マスターバッチ)が
挙げられる。
In the present invention, if necessary, 0.2 to 0.4% by weight of an antistatic agent is added to EVA.
It is preferable because it can impart antistatic properties. Examples of the antistatic agent include "EAR2" (trade name, masterbatch, 6% concentration of antistatic agent) manufactured by Riken Vitamin Co., Ltd.

【0010】本発明のフッドストレッチ用チューブ状フ
ィルムは、伸長回復率80%以上、且つ、伸長回復力7
0kg/cm2 以上である必要がある。伸長回復率が8
0%未満の場合には、パレット上に貨物をのせたものの
上に被せた場合、貨物をパレットとともに結束できる寸
法まで復元させることができず、又、引き伸ばし方を少
なくすると、包装機設計上支障をきたし、安定した運転
を行うことができない。
The tubular film for hood stretch of the present invention has an elongation recovery rate of 80% or more and an elongation recovery force of 7%.
It should be 0 kg / cm 2 or more. Growth recovery rate is 8
If it is less than 0%, it is not possible to restore the cargo to a size that can be bound together with the pallet when the cargo is placed on the pallet, and if the stretching method is reduced, the packaging machine design will be hindered. And it is impossible to drive stably.

【0011】伸長回復率が80%以上であっても、伸長
回復力が70kg/cm2 未満の場合には、重量貨物を
パレットとともに結束した場合に、重量貨物をパレット
に固定する力が弱く、運搬中や保管中等に、重量貨物が
傾いて荷崩れを引き起こしやすい。
Even if the elongation recovery rate is 80% or more, if the elongation recovery force is less than 70 kg / cm 2 , when the heavy cargo is bound with the pallet, the force for fixing the heavy cargo to the pallet is weak, During transportation and storage, heavy cargo is prone to collapse and collapse.

【0012】[0012]

【作用】本発明のフッドストレッチ用チューブ状フィル
ムは、酢酸ビニル含有量5〜15重量%、MI4以下の
エチレン─酢酸ビニル共重合体からなるフッドストレッ
チ用チューブ状フィルムであって、伸長回復率80%以
上、且つ、伸長回復力70kg/cm2 以上であること
により、強靱でよく伸び、且つ、伸長回復率及び伸長回
復力に優れており、パレット上に貨物をのせたものの上
に被せてパレット包装する際に、チューブ状フィルムを
4周方向に引き伸ばしても、フィルムに伸びむらが生じ
たり、包装時や包装後に破断したりすることなく、且
つ、貨物をパレットとともに強固に結束することがで
き、運搬中や保管中等に、貨物が傾いて荷崩れを引き起
こすようなことがない。
The tubular film for a hood stretch of the present invention is a tubular film for a hood stretch which comprises an ethylene-vinyl acetate copolymer having a vinyl acetate content of 5 to 15% by weight and an MI of 4 or less. % And the elongation recovery force of 70 kg / cm 2 or more, it is tough and expands well, and has excellent elongation recovery rate and elongation recovery force. Even when the tubular film is stretched in four circumferential directions during packaging, the film does not have uneven stretch and does not break during or after packaging, and the cargo can be firmly bound with the pallet. During transportation, storage, etc., the cargo will not tilt and the cargo will not collapse.

【0013】[0013]

【実施例】以下、本発明を実施例により説明する。実施例1 EVA(日本石油化学社製、商品名「レクスロンエバV
152」、酢酸ビニル含有率5重量%、MI0.3)1
00重量部に、スリップ剤マスターバッチ(三井石油化
学社製、商品名「SQ3」、スリップ剤濃度5%)2重
量部と、帯電防止剤マスターバッチ(理研ビタミン社
製、商品名「EAR2」、帯電防止剤濃度6%)4重量
部とを添加した配合原料を用いて、インフレーション法
にて、ブロー比約3.0、折幅2,000mm、厚さ7
0μmのフッドストレッチ用のチューブ状フィルムを作
製した。
EXAMPLES The present invention will be described below with reference to examples. Example 1 EVA (manufactured by Nippon Petrochemical Co., Ltd., trade name "LEXRON EVA V"
152 ", vinyl acetate content 5% by weight, MI 0.3) 1
To 100 parts by weight, 2 parts by weight of a slip agent masterbatch (manufactured by Mitsui Petrochemical Co., Ltd., trade name "SQ3", slip agent concentration 5%) and an antistatic agent masterbatch (manufactured by Riken Vitamin Co., Ltd., product name "EAR2", Using the blended raw material added with 4 parts by weight of the antistatic agent concentration of 6%), the blow ratio was about 3.0, the folding width was 2,000 mm, and the thickness was 7 by the inflation method.
A tube-shaped film for 0 μm hood stretch was produced.

【0014】実施例2 EVA(三井デュポンケミカル社製、商品名「エバフレ
ックスP1405」、酢酸ビニル含有率14重量%、M
I3.5)100重量部に、スリップ剤マスターバッチ
(三井石油化学社製、商品名「SQ3」、スリップ剤濃
度5%)2重量部と、帯電防止剤マスターバッチ(理研
ビタミン社製、商品名「EAR2」、帯電防止剤濃度6
%)4重量部とを添加した配合原料を用いて、インフレ
ーション法にて、ブロー比約3.0、折幅2,000m
m、厚さ70μmのフッドストレッチ用のチューブ状フ
ィルムを作製した。
Example 2 EVA (manufactured by Mitsui DuPont Chemical Co., trade name "Evaflex P1405", vinyl acetate content 14% by weight, M
I3.5) 2 parts by weight of a slip agent masterbatch (manufactured by Mitsui Petrochemical Co., Ltd., trade name "SQ3", slip agent concentration 5%) in 100 parts by weight, and an antistatic agent masterbatch (manufactured by RIKEN VITAMIN CO., LTD. "EAR2", antistatic agent concentration 6
%) 4 parts by weight, and a blown ratio of about 3.0 and a folding width of 2,000 m by an inflation method.
A tubular film for hood stretch having a thickness of m and a thickness of 70 μm was produced.

【0015】比較例1 低密度ポリエチレン(旭化成社製、商品名「サンテック
F1920」、密度0.919gr/cm3 、MI2)
100重量部に、スリップ剤マスターバッチ(三井石油
化学社製、商品名「SQ3」、スリップ剤濃度5%)2
重量部と、帯電防止剤マスターバッチ(理研ビタミン社
製、商品名「EAR2」、帯電防止剤濃度6%)4重量
部とを添加した配合原料を用いて、インフレーション法
にて、ブロー比約3.0、折幅2,000mm、厚さ7
0μmのフッドストレッチ用のチューブ状フィルムを作
製した。
Comparative Example 1 Low-density polyethylene (manufactured by Asahi Kasei Corp., trade name "Suntech F1920", density 0.919 gr / cm 3 , MI2)
In 100 parts by weight, a slip agent masterbatch (Mitsui Petrochemical Co., Ltd., trade name "SQ3", slip agent concentration 5%) 2
A blow ratio of about 3 was obtained by an inflation method using a blended raw material containing 4 parts by weight of an antistatic agent masterbatch (manufactured by Riken Vitamin Co., Ltd., trade name "EAR2", antistatic agent concentration 6%). 0.0, folding width 2,000 mm, thickness 7
A tube-shaped film for 0 μm hood stretch was produced.

【0016】比較例2 直鎖状低密度ポリエチレン(三井石油化学社製、商品名
「ウルトゼックス4020L」、密度0.940gr/
cm3 、MI2)100重量部に、スリップ剤マスター
バッチ(三井石油化学社製、商品名「SQ3」、スリッ
プ剤濃度5%)2重量部と、帯電防止剤マスターバッチ
(理研ビタミン社製、商品名「EAR2」、帯電防止剤
濃度6%)4重量部とを添加した配合原料を用いて、イ
ンフレーション法にて、ブロー比約3.0、折幅2,0
00mm、厚さ70μmのフッドストレッチ用のチュー
ブ状フィルムを作製した。
Comparative Example 2 Linear low density polyethylene (manufactured by Mitsui Petrochemical Co., Ltd., trade name "Ultox 4020L", density 0.940 gr /
cm 3, MI2) to 100 parts by weight, slip agent master batch (Mitsui Petrochemical Co., Ltd., trade name "SQ3" slip agent concentration of 5%) 2 parts by weight, the antistatic agent master batch (Riken Vitamin Co., Ltd., trade Blow ratio of about 3.0, folding width of 2,0 by the inflation method using the blended raw material to which the name "EAR2" and an antistatic agent concentration of 6%) 4 parts by weight was added.
A tubular film for hood stretch having a thickness of 00 mm and a thickness of 70 μm was produced.

【0017】実施例1,2及び比較例1,2で得られた
フッドストレッチ用チューブ状フィルムについて、フッ
ドストレッチ用チューブ状フィルムとして必要な特性と
しての下記の物性評価を行った。その結果を表1に示
す。引張りテスト JIS Z1702に準じて、島津製作所製オートグラ
フを用いて、室温にてフィルムの破断強度及び破断伸度
を測定した。引裂強度 JIS P8116に準じて、エルメンドルフ引裂強度
を測定した。伸長回復性 フィルムを常温で1.6倍延伸したときの応力、5分間
放置後の伸長回復力、その寸法の伸長回復率(%)を測
定した。
The physical properties of the tubular films for hood stretch obtained in Examples 1 and 2 and Comparative Examples 1 and 2 were evaluated as the following properties required for the tubular film for hood stretch. The results are shown in Table 1. Tensile test According to JIS Z1702, the breaking strength and breaking elongation of the film were measured at room temperature using an autograph manufactured by Shimadzu Corporation. Tear strength According to JIS P8116, Elmendorf tear strength was measured. The stress when the stretch-recoverable film was stretched 1.6 times at room temperature, the stretch-recovery force after standing for 5 minutes, and the stretch-recovery rate (%) of the dimension were measured.

【0018】[0018]

【表1】 [Table 1]

【0019】表1からも明らかな如く、実施例1,2の
場合は、いずれも、伸長回復率及び伸長回復力が優れて
いるのに対して、比較例1,2の場合は、伸長回復率及
び伸長回復力が劣っている。
As is clear from Table 1, in the cases of Examples 1 and 2, the elongation recovery rate and the elongation recovery force are excellent, whereas in the cases of Comparative Examples 1 and 2, the elongation recovery is achieved. The rate and recovery from elongation are inferior.

【0020】[0020]

【発明の効果】本発明は、上記の如き構成とされている
ので、パレット上に貨物をのせたものの上に被せてパレ
ット包装する際に、チューブ状フィルムを4周方向に引
き伸ばしてもフィルムに伸びむらが生じたり、包装時や
包装後に破断したりすることなく、且つ、貨物をパレッ
トとともに強固に結束することができ、又、運搬中や保
管中等に、貨物が傾いて荷崩れを引き起こすようなこと
がない。
EFFECTS OF THE INVENTION Since the present invention has the above-mentioned structure, when a tube-shaped film is stretched in four circumferential directions when the cargo is put on a pallet and is wrapped in the pallet, the film is formed into a film. The cargo can be tightly bound together with the pallet without causing uneven stretch or breaking during or after packaging, and the cargo may tilt and cause collapse during transportation or storage. There is nothing.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 酢酸ビニル含有量5〜15重量%、メル
トインデックス4以下のエチレン─酢酸ビニル共重合体
からなるフッドストレッチ用チューブ状フィルムであっ
て、伸長回復率80%以上、且つ、伸長回復力70kg
/cm2 以上であることを特徴とするフッドストレッチ
用チューブ状フィルム。
1. A tubular film for a hood stretch, comprising an ethylene-vinyl acetate copolymer having a vinyl acetate content of 5 to 15% by weight and a melt index of 4 or less, and having an elongation recovery rate of 80% or more and an elongation recovery. 70kg force
/ Cm 2 or more, a tubular film for a hood stretch.
JP13462493A 1993-06-04 1993-06-04 Tubular film for food stretching use Pending JPH06345880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13462493A JPH06345880A (en) 1993-06-04 1993-06-04 Tubular film for food stretching use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13462493A JPH06345880A (en) 1993-06-04 1993-06-04 Tubular film for food stretching use

Publications (1)

Publication Number Publication Date
JPH06345880A true JPH06345880A (en) 1994-12-20

Family

ID=15132733

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13462493A Pending JPH06345880A (en) 1993-06-04 1993-06-04 Tubular film for food stretching use

Country Status (1)

Country Link
JP (1) JPH06345880A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010254963A (en) * 2009-03-31 2010-11-11 Sumitomo Chemical Co Ltd Tubular film for hood stretching
JP2018178122A (en) * 2017-04-20 2018-11-15 住化積水フィルム株式会社 Normal temperature-shrinkable film and packaged articles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010254963A (en) * 2009-03-31 2010-11-11 Sumitomo Chemical Co Ltd Tubular film for hood stretching
JP2018178122A (en) * 2017-04-20 2018-11-15 住化積水フィルム株式会社 Normal temperature-shrinkable film and packaged articles

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