JPH03228640A - Film for retaining freshness - Google Patents
Film for retaining freshnessInfo
- Publication number
- JPH03228640A JPH03228640A JP2024463A JP2446390A JPH03228640A JP H03228640 A JPH03228640 A JP H03228640A JP 2024463 A JP2024463 A JP 2024463A JP 2446390 A JP2446390 A JP 2446390A JP H03228640 A JPH03228640 A JP H03228640A
- Authority
- JP
- Japan
- Prior art keywords
- freshness
- film
- thermoplastic resin
- resin film
- preserving
- 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
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 17
- 238000010030 laminating Methods 0.000 claims abstract description 3
- 239000003755 preservative agent Substances 0.000 claims description 21
- -1 polyethylene Polymers 0.000 abstract description 7
- 229910021536 Zeolite Inorganic materials 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000843 powder Substances 0.000 abstract description 5
- 239000010457 zeolite Substances 0.000 abstract description 5
- 239000004743 Polypropylene Substances 0.000 abstract description 4
- 229920001155 polypropylene Polymers 0.000 abstract description 4
- 235000014653 Carica parviflora Nutrition 0.000 abstract description 3
- 241000243321 Cnidaria Species 0.000 abstract description 3
- 239000004952 Polyamide Substances 0.000 abstract description 2
- 239000004698 Polyethylene Substances 0.000 abstract description 2
- 239000004793 Polystyrene Substances 0.000 abstract description 2
- 229920001577 copolymer Polymers 0.000 abstract description 2
- 229920001519 homopolymer Polymers 0.000 abstract description 2
- 229920002647 polyamide Polymers 0.000 abstract description 2
- 239000004417 polycarbonate Substances 0.000 abstract description 2
- 229920000515 polycarbonate Polymers 0.000 abstract description 2
- 229920000728 polyester Polymers 0.000 abstract description 2
- 229920000573 polyethylene Polymers 0.000 abstract description 2
- 229920000098 polyolefin Polymers 0.000 abstract description 2
- 229920002223 polystyrene Polymers 0.000 abstract description 2
- 239000004711 α-olefin Substances 0.000 abstract description 2
- 235000013399 edible fruits Nutrition 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 235000013311 vegetables Nutrition 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 235000012055 fruits and vegetables Nutrition 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 4
- 241001474374 Blennius Species 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920005629 polypropylene homopolymer Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- 235000011299 Brassica oleracea var botrytis Nutrition 0.000 description 1
- 235000017647 Brassica oleracea var italica Nutrition 0.000 description 1
- 240000003259 Brassica oleracea var. botrytis Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000003484 crystal nucleating agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920005674 ethylene-propylene random copolymer Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 239000005556 hormone Substances 0.000 description 1
- 229940088597 hormone Drugs 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
Landscapes
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
- Storage Of Fruits Or Vegetables (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、青果物の鮮度保持のために青果物の包装に好
適に用いられ、フィルム外観及び機械的強度に優れた鮮
度保持フィルムに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a freshness-keeping film that is suitably used for packaging fruits and vegetables to preserve their freshness and has excellent film appearance and mechanical strength.
生鮮品の運搬、貯蔵において鮮度を保持させるために各
種の方法が利用されている。それらのうち、青果物の鮮
度保持方法の一つとして、大谷石。Various methods are used to maintain freshness during transportation and storage of perishable products. Among them, Oya stone is one of the ways to keep fruits and vegetables fresh.
ゼオライト等の無機系多孔質粒子よりなる鮮度保持剤を
プラスチック中に練り込んでフィルム化した鮮度保持フ
ィルムによる包装がある。これは、多くの細かい孔を有
する無機系多孔質粒子がガスを吸着するという特徴を利
用して、青果物の代謝活動の結果発生する植物老化ホル
モンと言われるエチレンガスを吸着する作用をフィルム
に持たせることにより、青果物の成熟や老化を抑制しよ
うとするものである。There is packaging using a freshness-preserving film made by kneading a freshness-preserving agent made of inorganic porous particles such as zeolite into plastic. This film uses the characteristic that inorganic porous particles with many fine pores adsorb gases to create a film that has the ability to adsorb ethylene gas, which is said to be a plant aging hormone and is generated as a result of the metabolic activity of fruits and vegetables. This is intended to suppress the ripening and aging of fruits and vegetables.
上記従来の技術において、製膜方法としては、通常、イ
ンフレーション法やＴダイ法が採用されている。しかし
、これらの方法で製膜したフィルムは強度的に弱いとい
う欠点があった。また、鮮度保持フィルムのエチレンガ
ス等の吸着効果はフィルム表面付近に存在する鮮度保持
剤の量に依存するため、十分な鮮度保持効果を発現させ
るためにはフィルム中に含有させる鮮度保持剤の量を数
％程度とかなり多くする必要があった。しかし、そのよ
うにすると、鮮度保持フィルムの表面にプヅプツ感が生
じ、外観上好ましくなかった。In the above-mentioned conventional techniques, the inflation method or the T-die method is usually adopted as the film forming method. However, films formed by these methods have a drawback of being weak in strength. In addition, the adsorption effect of ethylene gas, etc. of a freshness-preserving film depends on the amount of freshness-preserving agent present near the film surface, so in order to achieve a sufficient freshness-preserving effect, the amount of freshness-preserving agent to be included in the film is required. It was necessary to increase it considerably by several percent. However, in this case, the surface of the freshness-preserving film had a sticky feel, which was unfavorable in terms of appearance.
一方、二輪延伸法によって製膜を行なうと、機械的強度
の向上した鮮度保持フィルムが得られるが、鮮度保持剤
を中心としたうろこ状の延伸あとが発生し、これまた、
外観上に問題が生じた。しかも、うろこ状の延伸あとの
ために機械的強度の向上は十分ではなく、鮮度保持剤を
含まない二軸延伸フィルムと比べて機械的強度は劣るも
のであった。On the other hand, when film formation is carried out by the two-wheel stretching method, a freshness-preserving film with improved mechanical strength is obtained, but scale-like stretching marks mainly caused by the freshness-preserving agent occur, and this also causes
There was a problem with the appearance. Moreover, the improvement in mechanical strength was not sufficient due to the scale-like stretching results, and the mechanical strength was inferior to that of a biaxially stretched film that did not contain a freshness-preserving agent.
（課題を解決するための手段〕
本発明者らは、上記した問題に鑑み、機械的強度及び外
観に優れ、特に青果物の鮮度保持に好適に使用し得る鮮
度保持フィルムを得ることを目的として研究を続けた結
果、上記目的を達成した鮮度保持フィルムの開発に成功
し、本発明を提案するに至った。(Means for Solving the Problems) In view of the above-mentioned problems, the present inventors conducted research with the aim of obtaining a freshness-preserving film that has excellent mechanical strength and appearance and can be particularly suitably used for preserving the freshness of fruits and vegetables. As a result of continued research, we succeeded in developing a freshness-preserving film that achieved the above objectives, and came to propose the present invention.
即ち、本発明は、二軸延伸熱可塑性樹脂フィルムの少く
とも一面に、平均粒径が０．１〜５０μｍの鮮度保持剤
を０．０１〜１重景％含有した一軸延伸熱可塑性樹脂フ
ィルムが積層されてなる鮮度保持フィルムである。That is, the present invention provides a uniaxially stretched thermoplastic resin film containing 0.01 to 1 weight percent of a freshness preserving agent having an average particle size of 0.1 to 50 μm on at least one side of the biaxially stretched thermoplastic resin film. This is a laminated freshness-preserving film.
本発明の鮮度保持フィルムの素材として用いられる熱可
塑性樹脂としては公知のもが何ら制限なく採用される。As the thermoplastic resin used as the material for the freshness-keeping film of the present invention, known thermoplastic resins can be used without any restrictions.
例えば、ポリスチレン；ポリエチレン、ポリプロピレン
等のポリオレフィン、；ポリアミド；ポリカーボネート
；ポリエステル等の熱可塑性樹脂を挙げることができる
。Examples include polystyrene; polyolefins such as polyethylene and polypropylene; polyamide; polycarbonate; and thermoplastic resins such as polyester.
これらの熱可塑性樹脂の中でも、青果物の鮮度保持効果
の点から、エチレン、プロピレン、ブテン−１、イソブ
チン−１、ヘキセン−１，４−メチルペンテン−１等の
α〜オレフィンの単独重合体又は共重合体、或いはこれ
らの重合体と他の重合体の混合物が好適に用いられる。Among these thermoplastic resins, homopolymers or copolymers of α-olefins such as ethylene, propylene, butene-1, isobutyne-1, and hexene-1,4-methylpentene-1 are preferred from the viewpoint of preserving the freshness of fruits and vegetables. Polymers or mixtures of these polymers and other polymers are preferably used.
本発明の鮮度保持フィルムにおける二軸延伸熱可塑性樹
脂フィルム（以下、Ａ層ともいう。）は、上記の熱可塑
性樹脂を公知の方法により二軸に延伸したフィルムであ
る。延伸倍率は、一般には一方向に１．１〜８倍、これ
とほぼ直角方向に３〜１２倍の範囲から採用される。Ａ
層の厚みは、本発明の鮮度保持フィルムの機械的強度を
高め、しかも包装性を良好にするためには５〜５０μｍ
の範囲であることが好ましい。The biaxially stretched thermoplastic resin film (hereinafter also referred to as A layer) in the freshness-keeping film of the present invention is a film obtained by biaxially stretching the above-mentioned thermoplastic resin by a known method. The stretching ratio is generally 1.1 to 8 times in one direction and 3 to 12 times in a direction substantially perpendicular to this. A
The thickness of the layer is 5 to 50 μm in order to increase the mechanical strength of the freshness preserving film of the present invention and to improve packaging properties.
It is preferable that it is in the range of .
上記した二輪延伸熱可塑性樹脂フィルムの少くとも一面
には、鮮度保持剤を含有した一軸延伸熱可塑性樹脂フィ
ルム（以下、Ｂ層ともいう。）が積層されている。上記
Ｂ層の素材は、前記Ａ層で説明した熱可塑性樹脂が何ら
制限なく採用される。A uniaxially stretched thermoplastic resin film (hereinafter also referred to as B layer) containing a freshness-preserving agent is laminated on at least one surface of the two-wheel stretched thermoplastic resin film described above. As the material for the B layer, the thermoplastic resin described for the A layer can be used without any limitation.
Ａ層との積層を熱融着によって行なう場合には、Ａ層の
素材との融点差が小さいものであることが好ましい。When laminating with layer A is performed by heat fusion, it is preferable that the melting point difference between the material and the material of layer A is small.
Ｂ層は、上記の熱可塑性樹脂を公知の方法により一軸に
延伸したフィルムである。延伸倍率は、一般には３〜１
２倍の範囲から採用される。Ｂ層の厚みは、鮮度保持剤
を固定し、包装性を良好にするために０．５〜１０μｍ
の範囲であることが好ましい。特に後述する鮮度保持剤
の平均粒径よりもＢ層の厚みが小さい場合には、鮮度保
持剤の粒子をＢ層の表面から露出させることができ、こ
のため、Ｂ層の厚みが鮮度保持剤の平均粒径よりも大き
い場合に比べて同程度の鮮度保持効果を得るために必要
な鮮度保持剤の量を低減させることができ、鮮度保持フ
ィルムの透明性を向上させることができる。Layer B is a film obtained by uniaxially stretching the above-mentioned thermoplastic resin by a known method. The stretching ratio is generally 3 to 1.
Adopted from twice the range. The thickness of layer B is 0.5 to 10 μm in order to fix the freshness preserving agent and improve packaging properties.
It is preferable that it is in the range of . Particularly when the thickness of layer B is smaller than the average particle diameter of the freshness-preserving agent, which will be described later, the particles of the freshness-preserving agent can be exposed from the surface of layer B. The amount of freshness-preserving agent required to obtain the same degree of freshness-preserving effect can be reduced compared to the case where the average particle size is larger than the average particle size of , and the transparency of the freshness-preserving film can be improved.
Ｂ層に含有させる鮮度保持剤は、エチレンガス等の低分
子ガスの吸着能に優れる物質なら公知の化合物が何ら制
限なく用いられる。たとえば、活性炭、ゼオライト、大
谷石、セラミック、サンゴ。As the freshness preserving agent to be contained in layer B, any known compound can be used without any restriction as long as it is a substance that has excellent adsorption ability for low molecular gas such as ethylene gas. For example, activated carbon, zeolite, Oya stone, ceramic, coral.
活性アルミナ、硝子、海草等の海産物の堆積物。Deposits of marine products such as activated alumina, glass, and seaweed.
シリカ、クリストバライト等の多孔性無機粒子が上げら
れる。なかでも、フィルムの透明性及び鮮度保持効果の
点から、ゼオライトサンゴ、海産物の堆積物の粉末が特
に好ましい。Examples include porous inorganic particles such as silica and cristobalite. Among these, powders of zeolite coral and marine product deposits are particularly preferred from the viewpoint of film transparency and freshness-keeping effects.
鮮度保持剤の平均粒径は、０．１〜５０μ−の範囲でな
ければならず、１〜３０μｍの範囲であることがフィル
ムに配合した場合のフィルムの外観及び鮮度保持効果の
点から特に好ましい。平均粒径が５０μ蒙より大きいと
Ｂ層の表面に鮮度保持剤を中心として延伸あとが発生す
るため外観上好ましくない。一方、平均粒径が０．１μ
園より小さいとＢ層の表面に鮮度保持剤が存在する割合
が少な（なる。従って、鮮度保持効果を出すためには鮮
度保持剤の添加量を多くする必要があり、透明性及び製
造価格上好ましくない。The average particle size of the freshness-preserving agent must be in the range of 0.1 to 50 μm, and the range of 1 to 30 μm is particularly preferable from the viewpoint of the appearance of the film and the freshness-preserving effect when incorporated into the film. . If the average particle size is larger than 50 μm, stretching marks will occur on the surface of layer B mainly due to the freshness-preserving agent, which is unfavorable in terms of appearance. On the other hand, the average particle size is 0.1μ
If the size is smaller than the size of the B layer, the proportion of the freshness-preserving agent on the surface of layer B will be small. Undesirable.
鮮度保持剤のＢ層中の含有割合は、０．０１〜１重量％
である。上記範囲よりも少ない場合には鮮度保持効果に
乏しく、上記範囲よりも多い場合には本発明の鮮度保持
フィルムの透明性が低下するために好ましくない。鮮度
保持効果とフィルムの透明性を勘案すると鮮度保持剤は
Ｂ層中に０．１〜０、５重量％の範囲で含有させること
が好ましい。The content of the freshness preserving agent in layer B is 0.01 to 1% by weight.
It is. When the amount is less than the above range, the freshness-keeping effect is poor, and when it is more than the above range, the transparency of the freshness-keeping film of the present invention decreases, which is not preferable. In consideration of the freshness preservation effect and the transparency of the film, it is preferable that the freshness preservation agent be contained in the B layer in an amount of 0.1 to 0.5% by weight.
本発明の鮮度保持フィルムは、一般に次のような方法に
よって製造することができる。まず、Ａ層となる熱可塑
性樹脂を押出成型によりシートとし、これを−軸方向に
１．１〜８倍に延伸して一軸延伸シートを得る。次いで
Ｂ層を形成するために熱可塑性樹脂と鮮度保持剤とを溶
融混練してシート状に押出し、これを上記の一軸延伸シ
ート上に積層する。そして、積層したシートを一軸延伸
の方向とほぼ直角方向に３〜１２倍延伸することにより
本発明の鮮度保持フィルムを得ることができる。The freshness-keeping film of the present invention can generally be manufactured by the following method. First, a thermoplastic resin serving as layer A is formed into a sheet by extrusion molding, and this is stretched 1.1 to 8 times in the -axial direction to obtain a uniaxially stretched sheet. Next, to form Layer B, a thermoplastic resin and a freshness-preserving agent are melt-kneaded and extruded into a sheet, which is then laminated on the uniaxially stretched sheet. The freshness-keeping film of the present invention can then be obtained by stretching the laminated sheets 3 to 12 times in a direction substantially perpendicular to the direction of uniaxial stretching.
尚、本発明の鮮度保持フィルムのＡ層及びＢ層には、熱
可塑性樹脂に通常添加することが知られている添加剤、
例えば、熱安定剤、酸化防止剤、結晶核剤、帯電防止剤
、滑剤、ブロッキング防止剤、紫外線吸収剤等を添加し
ても良い。In addition, the A layer and B layer of the freshness preservation film of the present invention contain additives that are commonly added to thermoplastic resins,
For example, heat stabilizers, antioxidants, crystal nucleating agents, antistatic agents, lubricants, antiblocking agents, ultraviolet absorbers, etc. may be added.
（効 果）
本発明の鮮度保持フィルムは、プップッ感、延伸痕が無
い良好な外観と高い透明性および優れた機械的強度を有
し、しかも青果物等の鮮度保持効果が高い。従って、本
発明の鮮度保持フィルムは青果物の包装用フィルムとし
て好適である。(Effects) The freshness-keeping film of the present invention has a good appearance with no puffiness or stretching marks, high transparency, and excellent mechanical strength, and is highly effective in preserving the freshness of fruits and vegetables. Therefore, the freshness-keeping film of the present invention is suitable as a packaging film for fruits and vegetables.
（実施例）
以下、本発明を実施例に基いて具体的に説明する。なお
、実施例における引張強度の測定はＪＩＳＺ １５２１
に準じて行った。(Examples) Hereinafter, the present invention will be specifically explained based on Examples. In addition, the measurement of tensile strength in the examples was conducted in accordance with JISZ 1521.
I followed the instructions.
実施例１
メルトインデックス１．８のポリプロピレンホモポリマ
ーをＴダイ押出機で２４０ｔの樹脂温度でシート状に押
出し、４０’Ｃに維持されたチルロールにより冷却固化
し、厚さ８００μｍのポリプロピレンシートを作った。Example 1 A polypropylene homopolymer with a melt index of 1.8 was extruded into a sheet using a T-die extruder at a resin temperature of 240 t, and cooled and solidified using a chill roll maintained at 40'C to produce a polypropylene sheet with a thickness of 800 μm. .
次にこのシートを加熱ロール延伸機により１００〜１５
０’ｊ：で４．５倍延伸し、１８０μｍの一軸延伸シー
トを得た。次に鮮度保持剤として平均粒径２０μｍの海
草堆積物の粉末を０．２重量％含んだメルトインデック
ス８．０のエチレン−プロピレンランダム共重合体をＴ
ダイ押出機で２００℃の樹脂温度でシート状に押出し、
先の一軸延伸シートに張り合わせ、２００μｍの２層シ
ートを得た。この２層シートを横延伸機を用い、１５０
℃において１０倍に延伸した。Next, this sheet is stretched to 100 to 15
It was stretched 4.5 times at 0'j: to obtain a uniaxially stretched sheet of 180 μm. Next, an ethylene-propylene random copolymer with a melt index of 8.0 containing 0.2% by weight of seaweed sediment powder with an average particle size of 20 μm was added as a freshness-preserving agent.
Extrude into a sheet with a die extruder at a resin temperature of 200℃,
This was pasted onto the previous uniaxially stretched sheet to obtain a 200 μm two-layer sheet. This two-layer sheet was stretched to 150 mm using a horizontal stretching machine.
It was stretched 10 times at ℃.
得られたフィルムの物性１表面観察結果、及び２３℃、
５０％の湿度下で３日間ブロッコリーを包装した場合の
鮮度保持結果について表１に示した。Physical properties of the obtained film 1 Surface observation results and 23°C,
Table 1 shows the freshness retention results when broccoli was packaged for 3 days under 50% humidity.
実施例２
実施例１の一軸延伸層の樹脂をエチレン−プロピレン−
ブテン−１三元共重合体としたこと以外は実施例１と同
様に行った。その結果を表１に示した。Example 2 The resin of the uniaxially stretched layer of Example 1 was made of ethylene-propylene-
The same procedure as in Example 1 was conducted except that a butene-1 terpolymer was used. The results are shown in Table 1.
実施例３
鮮度保持剤として平均粒径が５μｍの海草堆積物の粉末
を用いたこと以外は実施例１と同様に行った。結果を表
１に示した。Example 3 The same procedure as in Example 1 was carried out except that seaweed sediment powder having an average particle size of 5 μm was used as the freshness-preserving agent. The results are shown in Table 1.
実施例４
鮮度保持剤として平均粒径が５μｍのゼオライトを用い
たこと以外は実施例１と同様に行ない、その結果を表１
に示した。Example 4 The same procedure as Example 1 was carried out except that zeolite with an average particle size of 5 μm was used as the freshness preserving agent, and the results are shown in Table 1.
It was shown to.
比較例１
平均粒径２０μｍの海草堆積物の粉末を０．２重量％含
んだメルトインデックス１．８のポリプロピレンホモポ
リマーをＴダイ押出機で２４０℃の樹脂温度でシート状
に押出し、４０℃に維持されたチルロールにより冷却固
化し、厚さ９００μｍのポリプロピレンシートを作った
。次にこのシートを加熱ロール延伸機により１００〜１
５０℃で４．５倍延伸し、２００μｍの一軸延伸シート
を得た。この−軸延伸シートを横延伸機を用い１５０℃
において１０倍延伸した。得られたフィルムの物性、表
面観察結果、鮮度保持結果を表１に示した。Comparative Example 1 A polypropylene homopolymer with a melt index of 1.8 containing 0.2% by weight of seaweed sediment powder with an average particle size of 20 μm was extruded into a sheet at a resin temperature of 240°C using a T-die extruder, and then heated to 40°C. The mixture was cooled and solidified using a maintained chill roll to produce a polypropylene sheet with a thickness of 900 μm. Next, this sheet is stretched to 100 to 1
It was stretched 4.5 times at 50°C to obtain a 200 μm uniaxially stretched sheet. This -axis stretched sheet was heated to 150°C using a horizontal stretching machine.
The film was stretched 10 times. Table 1 shows the physical properties, surface observation results, and freshness retention results of the obtained film.
手続補正書 平成２年３月に日Procedural amendment Sun in March 1990
Claims (1)
、平均粒径が０．１〜５０μｍの鮮度保持剤を０．０１
〜１重量％含有した一軸延伸熱可塑性樹脂フィルムが積
層されてなる鮮度保持フィルム。(1) At least one side of the biaxially stretched thermoplastic resin film is coated with 0.01 μm of a freshness-preserving agent having an average particle size of 0.1 to 50 μm.
A freshness-keeping film formed by laminating uniaxially stretched thermoplastic resin films containing ~1% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2446390A JP2905533B2 (en) | 1990-02-05 | 1990-02-05 | Freshness preserving film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2446390A JP2905533B2 (en) | 1990-02-05 | 1990-02-05 | Freshness preserving film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03228640A true JPH03228640A (en) | 1991-10-09 |
| JP2905533B2 JP2905533B2 (en) | 1999-06-14 |
Family
ID=12138865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2446390A Expired - Fee Related JP2905533B2 (en) | 1990-02-05 | 1990-02-05 | Freshness preserving film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2905533B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113581650A (en) * | 2021-07-01 | 2021-11-02 | 徐建军 | Transparent breathable film for agricultural product fresh-keeping packaging and manufacturing process thereof |
-
1990
- 1990-02-05 JP JP2446390A patent/JP2905533B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113581650A (en) * | 2021-07-01 | 2021-11-02 | 徐建军 | Transparent breathable film for agricultural product fresh-keeping packaging and manufacturing process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2905533B2 (en) | 1999-06-14 |
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