JP2553878B2 - Corrugated box - Google Patents
Corrugated boxInfo
- Publication number
- JP2553878B2 JP2553878B2 JP19548987A JP19548987A JP2553878B2 JP 2553878 B2 JP2553878 B2 JP 2553878B2 JP 19548987 A JP19548987 A JP 19548987A JP 19548987 A JP19548987 A JP 19548987A JP 2553878 B2 JP2553878 B2 JP 2553878B2
- Authority
- JP
- Japan
- Prior art keywords
- copper
- coordinated
- chloride
- freshness
- valence
- 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 - Lifetime
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Description
【発明の詳細な説明】 （イ） 産業上の利用分野 本発明は、収穫後の農産物の鮮度を良好に保持したま
ま運搬する際に用いるのに適した段ボール箱に関するも
のである。TECHNICAL FIELD The present invention relates to a cardboard box suitable for use in transporting agricultural products after harvesting while keeping the freshness of the agricultural products in good condition.
（ロ） 従来の技術及び発明が解決しようとする問題点 近年、生鮮農産物にあっては、栄養成分よりも香りや
色，水々しさ等に魅かれ、歯ごたえや風味，食味等官能
的な側面に重きが置かれるようになってきた。即ち、生
鮮農産物の価値はその鮮度にあると言っても過言ではな
い。しかるに、収穫後の農産物を段ボール箱で包装し、
産地から消費地まで運搬する間に鮮度が低下し、生鮮農
産物の商品価値が低下するということがあった。(B) Problems to be solved by the conventional techniques and inventions In recent years, fresh agricultural products have been attracted by fragrance, color, freshness, etc. rather than nutritional components, and have a sensual side such as texture, flavor, and taste. The importance has come to be placed on. In other words, it is no exaggeration to say that the value of fresh agricultural products depends on their freshness. However, the harvested agricultural products are packed in cardboard boxes,
During transportation from the production area to the consumption area, the freshness of the product was reduced, and the product value of fresh agricultural products was sometimes reduced.
生鮮農産物の鮮度の低下は、種々の要因によって発生
するが、最も大きな要因として生鮮農産物が生成する老
化ホルモンとも言われるエチレンガスが挙げられる。即
ち、段ボール箱による包装という閉鎖的な環境の下で、
段ボール箱内に生鮮農産物が生成するエチレンガスが充
満し生鮮農産物に併用して、これの老化を促進するので
ある。The decrease in freshness of fresh agricultural products occurs due to various factors, and the largest factor is ethylene gas, which is also called aging hormone produced by fresh agricultural products. In other words, under the closed environment of cardboard box packaging,
The corrugated box is filled with ethylene gas produced by fresh produce and used in combination with fresh produce to promote aging.
この要因を排除するためには、エチレンガスを吸着す
るエチレン吸着剤を段ボール箱の段ボール紙の内側に接
着剤を用いて塗布しておき、運搬中に発生したエチレン
ガスは段ボール紙自体に吸着させることが考えられる。
しかしながら、エチレン吸着剤に一旦吸着されたエチレ
ンガスであっても、外気の温度が上昇すると再び外部へ
放出されるということがあった。これは、温度の上昇に
よりエチレンガスの運動が活発になるからである。放出
されたエチレンガスは、段ボール箱内に充満し生鮮農産
物に作用してこれの老化を促進する。従って、運搬中に
外気の温度が上昇するとエチレン吸着剤が有効に機能し
なくなり、農産物の鮮度が低下するということがあっ
た。In order to eliminate this factor, an ethylene adsorbent that adsorbs ethylene gas is applied to the inside of the corrugated board of the corrugated board using an adhesive, and the ethylene gas generated during transportation is adsorbed to the corrugated board itself. It is possible.
However, even if ethylene gas once adsorbed by the ethylene adsorbent is released to the outside again when the temperature of the outside air rises. This is because the movement of ethylene gas becomes active as the temperature rises. The released ethylene gas fills the cardboard box and acts on fresh agricultural products to promote their aging. Therefore, if the temperature of the outside air rises during transportation, the ethylene adsorbent may not function effectively and the freshness of agricultural products may decrease.
そこで、本発明はエチレン吸着剤と他のある特定の物
質とを配合した鮮度保持剤を段ボール紙に付着させた段
ボール箱を用いて農産物を運搬することにより、運搬中
に外気の温度が上昇しても、一旦吸着されたエチレンガ
スが放出されない段ボール箱を提供しようとするもので
ある。Therefore, in the present invention, by transporting agricultural products using a corrugated cardboard box in which a freshness preserving agent containing an ethylene adsorbent and another specific substance is attached to corrugated cardboard paper, the temperature of outside air increases during transportation. Even so, it is intended to provide a corrugated cardboard box in which ethylene gas once adsorbed is not released.
（ハ） 問題点を解決するための手段 即ち本発明は、架橋ポリスチレンに塩化銅（Ｉ）及び
塩化アルミニウムを配位させた高分子錯体，架橋ポリス
チレンに塩化銀（Ｉ）及び塩化アルミニウムを配位させ
た高分子錯体，イオン交換樹脂に塩化銅（Ｉ）を配位さ
せた高分子錯体，ゼオライトに銅（Ｉ）イオンを配位さ
せた無機系錯体，γ−アルミナに銅（Ｉ）イオンを配位
させた無機系錯体及び活性炭に硝酸銅を配位させた無機
系錯体よりなる群より選ばれたエチレン吸着剤と、高吸
水性樹脂と、原子価が少なくとも二以上であり且つそれ
より少ない原子価をとりうる多価金属の塩と、該多価金
属の塩を水の存在下で還元し原子価を減少させた金属塩
とする亜硫酸水素ナトリウムとを必須成分として含有す
る鮮度保持剤を、段ボール紙に付着させたことを特徴と
する段ボール箱に関するものである。(C) Means for Solving the Problems That is, according to the present invention, a polymer complex in which copper (I) chloride and aluminum chloride are coordinated to crosslinked polystyrene, and silver (I) and aluminum chloride are coordinated to crosslinked polystyrene Polymer complex, ion exchange resin with copper (I) chloride coordinated, zeolite with copper (I) ion coordinated inorganic complex, γ-alumina with copper (I) ion An ethylene adsorbent selected from the group consisting of a coordinated inorganic complex and an inorganic complex in which copper nitrate is coordinated to activated carbon, a super absorbent polymer, and a valence of at least two and less A freshness-retaining agent containing, as an essential component, a salt of a polyvalent metal capable of taking a valence and sodium bisulfite, which is a metal salt obtained by reducing the salt of the polyvalent metal in the presence of water to reduce the valence. Attached to corrugated paper The present invention relates to a cardboard box characterized by that.
本発明においてエチレン吸着剤は、架橋ポリスチレン
に塩化銅（Ｉ）及び塩化アルミニウムを配位させた高分
子錯体、架橋ポリスチレンに塩化銀（Ｉ）及び塩化アル
ミニウムを配位させた高分子錯体、イオン交換樹脂に塩
化銅（Ｉ）を配位させた高分子錯体、ゼオライトに銅
（Ｉ）イオンを配位させた無機系錯体、γ−アルミナに
銅（Ｉ）イオンを配位させた無機系錯体及び活性炭に硝
酸銅を配位させた無機系錯体が単独で又は混合して用い
られる。In the present invention, the ethylene adsorbent is a polymer complex in which copper (I) chloride and aluminum chloride are coordinated to crosslinked polystyrene, a polymer complex in which silver (I) chloride and aluminum chloride are coordinated to crosslinked polystyrene, ion exchange A polymer complex in which copper (I) chloride is coordinated to a resin; an inorganic complex in which copper (I) ion is coordinated to zeolite; an inorganic complex in which copper (I) ion is coordinated to γ-alumina; An inorganic complex in which copper nitrate is coordinated with activated carbon is used alone or in combination.
架橋ポリスチレンに塩化銅（Ｉ）及び塩化アルミニウ
ムを配位させた高分子錯体は、以下の如き方法で得るこ
とができる。まず、スチレンとジビニルベンゼンとを適
宜の割合で混合し、重合させて架橋ポリスチレンを得
る。この架橋ポリスチレンと塩化銅（Ｉ）及び塩化アル
ミニウムとを混合し加熱すると、架橋ポリスチレンにが
配位させた高分子錯体が得られる。塩化銅（Ｉ）及び塩
化アルミニウムの配位箇所は架橋ポリスチレンの芳香環
であると考えられる。その他のエチレン吸着剤も、これ
と同様の方法で得ることができる。A polymer complex in which copper (I) chloride and aluminum chloride are coordinated to crosslinked polystyrene can be obtained by the following method. First, styrene and divinylbenzene are mixed at an appropriate ratio and polymerized to obtain crosslinked polystyrene. When this crosslinked polystyrene is mixed with copper (I) chloride and aluminum chloride and heated, a polymer complex coordinated with the crosslinked polystyrene is obtained. The coordination site of copper (I) chloride and aluminum chloride is considered to be an aromatic ring of cross-linked polystyrene. Other ethylene adsorbents can be obtained in a similar manner.
本発明に用いる高吸水性樹脂は、自重の10倍以上、好
ましくは自重の100倍以上の水を吸水，保持する高分子
重合体であって、例えば澱粉−アクリロニトリルグラフ
ト重合体，澱粉−アクリル酸塩グラフト重合体，ポリア
クリル酸塩の自己架橋物，アクリル酸−アクリロニトリ
ル共重合体，ポリアクリル酸塩の架橋物等が挙げられ
る。The superabsorbent resin used in the present invention is a high-molecular polymer that absorbs and retains water at least 10 times its own weight, preferably at least 100 times its own weight, such as starch-acrylonitrile graft polymer and starch-acrylic acid. Examples include a salt graft polymer, a self-crosslinked polyacrylate, an acrylic acid-acrylonitrile copolymer, and a crosslinked polyacrylate.
本発明に用いる原子価が少なくとも二以上であり且つ
それより少ない原子価をとりうる多価金属の塩として
は、硫酸第二鉄（Fe2(SO4)3），塩化第二鉄（FeCl3），
硫酸第二銅（CuSO4），塩化第二銅（CuCl2），硫酸第二
クロム（Cr2(SO4)3），塩化第二クロム（CrCl3）等が用
いられる。これらの多価金属塩は水の存在下で亜硫酸水
素ナトリウムと反応して還元され、多価金属の原子価が
減少して各々硫酸第一鉄（FeSO4），塩化第一鉄（FeC
l2），硫酸第一銅（Cu2SO4），塩化第一銅（CuCl），硫
酸第一クロム（CrSO4），塩化第一クロム（CrCl2）等と
なる。この多価金属塩の還元反応は吸熱反応となり外部
の熱を奪い、冷却作用を発揮する。The polyvalent metal salt having at least two valences and less valences used in the present invention includes ferric sulfate (Fe 2 (SO 4 ) 3 ), ferric chloride (FeCl 3 ),
Cupric sulfate (CuSO 4 ), cupric chloride (CuCl 2 ), chromic sulfate (Cr 2 (SO 4 ) 3 ), chromic chloride (CrCl 3 ), etc. are used. These polyvalent metal salts are reduced by reacting with sodium bisulfite in the presence of water, the valence of the polyvalent metal is reduced, and ferrous sulfate (FeSO 4 ) and ferrous chloride (FeC
l 2 ), cuprous sulfate (Cu 2 SO 4 ), cuprous chloride (CuCl), chrome sulfate (CrSO 4 ), chrome chloride (CrCl 2 ), etc. This reduction reaction of the polyvalent metal salt becomes an endothermic reaction, deprives external heat, and exerts a cooling action.
本発明に用いる各物質は、外気の状態に応じて所望の
割合で配合される。即ち、夏期においては外気が比較的
高温であるため、共働して冷却作用を発揮する、原子価
が少なくとも二以上であり且つそれより少ない原子価を
とりうる多価金属の塩と、該多価金属の塩を水の存在下
で還元し原子価を減少させた金属塩とする亜硫酸水素ナ
トリウム及び高吸水性樹脂を多めに配合するのがよい。
また、その際予め高吸水性樹脂に水を含有させておいて
もよい。冬期においては外気が比較的低温であるため、
エチレンガス吸着剤以外の高吸水性樹脂等の物質は少な
めに配合するのがよい。Each substance used in the present invention is blended at a desired ratio according to the state of the outside air. That is, since the outside air is relatively high in summer, a salt of a polyvalent metal that has a valence of at least two and can have a valence of at least two, which cooperate to exert a cooling action, is used. It is advisable to add a large amount of sodium bisulfite and a superabsorbent resin, which are metal salts reduced in valence by reducing a valent metal salt in the presence of water.
Further, in that case, water may be contained in the super absorbent polymer in advance. Since the outside air is relatively cold in winter,
It is preferable to add a small amount of a substance such as a super absorbent resin other than the ethylene gas adsorbent.
上記の四物質を均一に混合して鮮度保持剤とする。こ
の鮮度保持剤を段ボール紙に付着させる方法としては、
以下の如くである。例えば、予め接着剤が塗布された段
ボール紙に鮮度保持剤を散布して、鮮度保持剤を付着さ
せる方法、鮮度保持剤と接着剤とを混練して段ボール紙
に塗布して付着させる方法、更に段ボール紙を作成する
際に段ボール紙の中間層に挟着・積層して付着させる方
法等がある。The above four substances are uniformly mixed to obtain a freshness-retaining agent. As a method of attaching this freshness maintaining agent to corrugated paper,
It is as follows. For example, a freshness-retaining agent is sprinkled on a corrugated paperboard to which an adhesive is applied in advance, and a method of attaching the freshness-retaining agent, a method of kneading the freshness-retaining agent and the adhesive and applying and adhering to the corrugated paperboard, When making corrugated paper, there is a method of sandwiching and laminating it on the intermediate layer of corrugated paper.
（ニ） 作用 本発明に用いるエチレン吸着剤は、生鮮農産物が生成
する老化ホルモンであるエチレンガスを吸着する。高吸
水性樹脂は生鮮農産物から蒸発する水を又は人手により
注水した水を含有するものである。原子価が少なくとも
二以上であり且つそれより少なく原子価をとりうる多価
金属の塩と該多価金属の塩を水の存在下で還元し原子価
を減少させた金属塩とする亜硫酸水素ナトリウムとは前
記の高吸水性樹脂に含有されている水が蒸発するとその
水と接触して還元反応が起こり、冷却作用を発揮する。(D) Action The ethylene adsorbent used in the present invention adsorbs ethylene gas, which is a aging hormone produced by fresh agricultural products. The superabsorbent resin contains water that evaporates from fresh produce or water that is manually injected. A salt of a polyvalent metal having a valence of at least two and a valence less than that, and sodium bisulfite which is a metal salt reduced in the valence by reducing the salt of the polyvalent metal in the presence of water. When the water contained in the super absorbent polymer evaporates, it comes into contact with the water to cause a reduction reaction and exert a cooling effect.
従って、外気の温度が上昇すると高吸水性樹脂に含有
されている水が蒸発して、原子価が少なくとも二以上で
あり且つそれより少ない原子価をとりうる多価金属の塩
と該多価金属の塩を水の存在下で還元し原子価を減少さ
せた金属塩とする亜硫酸水素ナトリウムとに接触して冷
却作用を発揮する。この冷却によりエチレン吸着剤の雰
囲気温度は上昇せず、一旦吸着したエチレンガスが放出
しにくくなる。Accordingly, when the temperature of the outside air rises, the water contained in the superabsorbent resin evaporates, and a salt of a polyvalent metal having a valence of at least 2 and a valence lower than the same is provided. In the presence of water to reduce the valency and contact sodium bisulfite, which is a metal salt, to exert a cooling effect. Due to this cooling, the ambient temperature of the ethylene adsorbent does not rise, and the once adsorbed ethylene gas is hardly released.
（ホ） 実施例 実施例１ 架橋ポリスチレン（スチレンとジビニルベンゼンとの
8:2共重合物、マクロレティキュラー型）12.7gと塩化銅
（Ｉ）9.9gと塩化アルミニウム13.3gとを二硫化炭素中
に投入し、50℃で加熱・撹拌し、溶媒である二硫化炭素
を減圧・除去して架橋ポリスチレンに塩化銅（Ｉ）及び
塩化アルミニウムを配位させた高分子錯体を得た。(E) Example Example 1 Crosslinked polystyrene (of styrene and divinylbenzene
8: 2 copolymer, macroreticular type) 12.7 g, copper (I) chloride 9.9 g and aluminum chloride 13.3 g are put into carbon disulfide, heated and stirred at 50 ° C., and disulfide as a solvent is added. Carbon was removed under reduced pressure to obtain a polymer complex in which copper (I) chloride and aluminum chloride were coordinated to crosslinked polystyrene.
この高分子錯体10gと高吸水性樹脂7gと硫酸第二鉄8g
と亜硫酸ナトリウム5gとを均一に混合して鮮度保持剤を
得た。10 g of this polymer complex, 7 g of superabsorbent resin and 8 g of ferric sulfate
And 5 g of sodium sulfite were uniformly mixed to obtain a freshness preserving agent.
この鮮度保持剤30gを接着剤溶液（酢酸ビニル5gをエ
チルアルコール100gに溶解させたもの）に分散した後、
段ボール紙の内面に塗布・乾燥して、段ボール箱を得
た。After dispersing 30 g of this freshness preserving agent in an adhesive solution (5 g of vinyl acetate dissolved in 100 g of ethyl alcohol),
The inner surface of the corrugated paper was coated and dried to obtain a corrugated cardboard box.
実施例２ 架橋ポリスチレン（スチレンとジビニルベンゼンとの
8:2共重合物、マクロレティキュラー型）12.7gと塩化銀
（Ｉ）14.6gと塩化アルミニウム13.3gとを二硫化炭素中
に投入し、６時間加熱還流した後に、溶媒である二硫化
炭素を減圧・除去して架橋ポリスチレンに塩化銀（Ｉ）
及び塩化アルミニウムを配位させた高分子錯体を得た。Example 2 Crosslinked polystyrene (of styrene and divinylbenzene)
82.7 copolymer, macroreticular type) 12.7 g, silver (I) chloride 14.6 g and aluminum chloride 13.3 g were put into carbon disulfide, heated to reflux for 6 hours, and then subjected to carbon disulfide as a solvent. Is removed under reduced pressure and silver chloride (I) is added to the crosslinked polystyrene.
And a polymer complex coordinated with aluminum chloride.
この高分子錯体10gと高吸水性樹脂10gと塩化第二鉄1
0.8gと亜硫酸ナトリウム8gとを均一に混合して鮮度保持
剤を得た。10 g of this polymer complex, 10 g of super absorbent resin and ferric chloride 1
0.8 g and 8 g of sodium sulfite were uniformly mixed to obtain a freshness-retaining agent.
この鮮度保持剤を、二枚の段ボール紙片の間に挟着し
て段ボール紙を作成し、これを箱状にして段ボール箱と
した。This freshness-retaining agent was sandwiched between two pieces of corrugated paper to prepare corrugated paper, which was then box-shaped to form a corrugated cardboard box.
比較例１ 実施例１で得られた高分子錯体単独を鮮度保持剤とし
て、実施例１と同様の方法で段ボール箱を得た。Comparative Example 1 A corrugated cardboard box was obtained in the same manner as in Example 1, except that the polymer complex obtained in Example 1 alone was used as a freshness-retaining agent.
比較例２ 実施例２で得られた高分子錯体単独を鮮度保持剤とし
て、実施例２と同様の方法で段ボール箱を得た。Comparative Example 2 A corrugated cardboard box was obtained in the same manner as in Example 2 except that the polymer complex obtained in Example 2 alone was used as a freshness-retaining agent.
実施例1,2及び比較例1,2で得られた段ボール箱の鮮度
保持性能を評価するため以下の如き試験を行った。鮮度
保持剤が付着していない段ボール箱及び実施例１等で得
られた段ボール箱の中に裁断した柿を入れて、柿の裁断
部が黒変する時間を測定した。尚、この際の外気の温度
は35℃に保った。その結果、鮮度保持剤が付与されてい
ない段ボール箱の場合は40分経過後柿の裁断部が黒変
し、実施例１のものは60分経過後、実施例２のものは10
0分経過後、比較例１のものは50分経過後、比較例２の
ものは60分経過後、柿の裁断部が黒変した。従って、実
施例１及び２で得られる鮮度保持剤は、比較例１及び２
のものに比べて、鮮度保持性能に優れていることがわか
る。The following tests were conducted to evaluate the freshness retention performance of the cardboard boxes obtained in Examples 1 and 2 and Comparative Examples 1 and 2. The cut persimmon was put in a corrugated cardboard box to which the freshness-retaining agent was not adhered and the corrugated cardboard box obtained in Example 1 and the like, and the time at which the cut part of the persimmon turned black was measured. The temperature of the outside air at this time was kept at 35 ° C. As a result, in the case of a corrugated cardboard box to which the freshness-retaining agent was not applied, the cut part of the persimmon turned black after 40 minutes, the one of Example 1 was 60 minutes later, and the one of Example 2 was 10 minutes.
After 0 minutes, after 50 minutes in Comparative Example 1 and after 60 minutes in Comparative Example 2, the cut part of the persimmon turned black. Therefore, the freshness-retaining agents obtained in Examples 1 and 2 are the same as Comparative Examples 1 and 2.
It can be seen that the freshness retention performance is superior to that of No.
（ヘ） 発明の効果 以上説明したように、本発明に用いるエチレン吸着剤
は、生鮮農産物が生成する老化ホルモンであるエチレン
ガスを吸着する。そして、水を含有した高吸水性樹脂は
外気の温度の上昇に伴って水を蒸発し、その水が、原子
価が少なくとも二以上であり且つそれより少ない原子価
をとりうる多価金属の塩と該多価金属の塩を水の存在下
で還元し原子価を減少させた金属塩とする亜硫酸水素ナ
トリウムとに作用し、還元反応を生ぜしめ冷却作用を発
揮する。そして、この冷却作用によりエチレン吸着剤の
雰囲気温度は上昇せず、一旦吸着したエチレンガスが放
出しにくくなる。(F) Effects of the Invention As described above, the ethylene adsorbent used in the present invention adsorbs ethylene gas, which is a aging hormone produced by fresh agricultural products. Then, the water-containing superabsorbent resin evaporates water as the temperature of the outside air rises, and the water has a valence of at least two and a salt of a polyvalent metal capable of having a valence less than that. And the salt of the polyvalent metal are reduced in the presence of water to act as a metal salt of which the valence has been reduced to sodium bisulfite to cause a reduction reaction and exert a cooling action. Due to this cooling action, the ambient temperature of the ethylene adsorbent does not rise, and the once adsorbed ethylene gas becomes difficult to release.
このような作用を生ぜしめる鮮度保持剤を付着させた
段ボール箱を用いると、段ボール箱内にエチレンガスが
充満することが少なく、老化ホルモンであるエチレンガ
スが農産物に作用することが少なくなる。依って、段ボ
ール箱内の生鮮農産物の鮮度が長期間保持しうるという
効果を奏する。When a corrugated cardboard box to which a freshness-retaining agent that causes such an action is attached is used, the corrugated cardboard box is less likely to be filled with ethylene gas, and the aging hormone ethylene gas is less likely to act on agricultural products. Therefore, the freshness of the fresh agricultural products in the cardboard box can be maintained for a long period of time.
Claims (1)
アルミニウムを配位させた高分子錯体，架橋ポリスチレ
ンに塩化銀（Ｉ）及び塩化アルミニウムを配位させた高
分子錯体，イオン交換樹脂に塩化銅（Ｉ）を配位させた
高分子錯体，ゼオライトに銅（Ｉ）イオンを配位させた
無機系錯体，γ−アルミナに銅（Ｉ）イオンを配位させ
た無機系錯体及び活性炭に硝酸銅を配位させた無機系錯
体よりなる群より選ばれたエチレン吸着剤と、高吸水性
樹脂と、原子価が少なくとも二以上であり且つそれより
少ない原子価をとりうる多価金属の塩と、該多価金属の
塩を水の存在下で還元し原子価を減少させた金属塩とす
る亜硫酸水素ナトリウムとを必須成分として含有する鮮
度保持剤を、段ボール紙に付着させたことを特徴とする
段ボール箱。1. A polymer complex in which copper (I) chloride and aluminum chloride are coordinated to crosslinked polystyrene, a polymer complex in which silver (I) chloride and aluminum chloride are coordinated to crosslinked polystyrene, and an ion exchange resin is chlorinated. Polymer complex coordinated with copper (I), inorganic complex coordinated with copper (I) ion in zeolite, inorganic complex coordinated with copper (I) ion in γ-alumina and nitric acid in activated carbon An ethylene adsorbent selected from the group consisting of copper-coordinating inorganic complexes, a highly water-absorbent resin, and a salt of a polyvalent metal having a valence of at least two and less than that A freshness-retaining agent containing, as an essential component, sodium bisulfite, which is a metal salt reduced in valence by reducing the salt of the polyvalent metal in the presence of water. Cardboard box to do.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19548987A JP2553878B2 (en) | 1987-08-05 | 1987-08-05 | Corrugated box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19548987A JP2553878B2 (en) | 1987-08-05 | 1987-08-05 | Corrugated box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6439938A JPS6439938A (en) | 1989-02-10 |
| JP2553878B2 true JP2553878B2 (en) | 1996-11-13 |
Family
ID=16341937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19548987A Expired - Lifetime JP2553878B2 (en) | 1987-08-05 | 1987-08-05 | Corrugated box |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2553878B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101307506B1 (en) | 2012-07-09 | 2013-09-12 | 임혁열 | Freshness maintainable corrugated cardboard and package box including it |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0662181B2 (en) * | 1989-03-01 | 1994-08-17 | レンゴー株式会社 | Packaging box for fruits and vegetables |
| ES2228492T3 (en) * | 1999-03-12 | 2005-04-16 | Basf Aktiengesellschaft | SUPER ABSORBENT POLYMERIC COMPOSITION OF STABLE COLOR. |
| DE102014003886A1 (en) * | 2014-03-19 | 2015-09-24 | Roba Services Gmbh | Functionalized corrugated board |
| CN105170424B (en) * | 2015-08-03 | 2018-01-30 | 浙江理工大学 | A kind of preparation method of ethylene absorption type preserving fruit and vegetable utilizing corrugated case |
-
1987
- 1987-08-05 JP JP19548987A patent/JP2553878B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101307506B1 (en) | 2012-07-09 | 2013-09-12 | 임혁열 | Freshness maintainable corrugated cardboard and package box including it |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6439938A (en) | 1989-02-10 |
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