JPH0582203B2 - - Google Patents
Info
- Publication number
- JPH0582203B2 JPH0582203B2 JP62156639A JP15663987A JPH0582203B2 JP H0582203 B2 JPH0582203 B2 JP H0582203B2 JP 62156639 A JP62156639 A JP 62156639A JP 15663987 A JP15663987 A JP 15663987A JP H0582203 B2 JPH0582203 B2 JP H0582203B2
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- heat
- microwave cooking
- conductive
- heating accelerator
- 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
- 239000000835 fiber Substances 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000010411 cooking Methods 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- -1 whiskers Substances 0.000 claims description 8
- 239000000049 pigment Substances 0.000 claims description 7
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 239000012784 inorganic fiber Substances 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 3
- 229910001887 tin oxide Inorganic materials 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 229920001131 Pulp (paper) Polymers 0.000 claims description 2
- 229920000297 Rayon Polymers 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- VCNTUJWBXWAWEJ-UHFFFAOYSA-J aluminum;sodium;dicarbonate Chemical compound [Na+].[Al+3].[O-]C([O-])=O.[O-]C([O-])=O VCNTUJWBXWAWEJ-UHFFFAOYSA-J 0.000 claims description 2
- XBJJRSFLZVLCSE-UHFFFAOYSA-N barium(2+);diborate Chemical compound [Ba+2].[Ba+2].[Ba+2].[O-]B([O-])[O-].[O-]B([O-])[O-] XBJJRSFLZVLCSE-UHFFFAOYSA-N 0.000 claims description 2
- 229910021538 borax Inorganic materials 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910001647 dawsonite Inorganic materials 0.000 claims description 2
- SHFGJEQAOUMGJM-UHFFFAOYSA-N dialuminum dipotassium disodium dioxosilane iron(3+) oxocalcium oxomagnesium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Na+].[Na+].[Al+3].[Al+3].[K+].[K+].[Fe+3].[Fe+3].O=[Mg].O=[Ca].O=[Si]=O SHFGJEQAOUMGJM-UHFFFAOYSA-N 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000010440 gypsum Substances 0.000 claims description 2
- 229910052602 gypsum Inorganic materials 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- 239000011490 mineral wool Substances 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 239000010451 perlite Substances 0.000 claims description 2
- 235000019362 perlite Nutrition 0.000 claims description 2
- 229920002492 poly(sulfone) Polymers 0.000 claims description 2
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920000306 polymethylpentene Polymers 0.000 claims description 2
- 239000011116 polymethylpentene Substances 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 239000002964 rayon Substances 0.000 claims description 2
- 239000004328 sodium tetraborate Substances 0.000 claims description 2
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims 2
- 229920006282 Phenolic fiber Polymers 0.000 claims 1
- 239000004962 Polyamide-imide Substances 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 239000004760 aramid Substances 0.000 claims 1
- 229920003235 aromatic polyamide Polymers 0.000 claims 1
- 229920002312 polyamide-imide Polymers 0.000 claims 1
- 229920003002 synthetic resin Polymers 0.000 claims 1
- 239000000057 synthetic resin Substances 0.000 claims 1
- 239000011787 zinc oxide Substances 0.000 claims 1
- 235000013305 food Nutrition 0.000 description 20
- 239000000123 paper Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 229920002401 polyacrylamide Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 150000002016 disaccharides Chemical class 0.000 description 2
- 239000000796 flavoring agent Substances 0.000 description 2
- 235000019634 flavors Nutrition 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 235000021056 liquid food Nutrition 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000014347 soups Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 241001137251 Corvidae Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012611 container material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 235000015108 pies Nutrition 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Landscapes
- Cookers (AREA)
- Laminated Bodies (AREA)
Description
産業上の利用分野
本発明は、使い捨ての食品用パツケージに関す
るものである。特にマイクロ波で食品を調理する
際に食品に焦げ目をつけ通常の調理法と同様の風
味を得たり、またスープなどの液体食品の加熱を
促進するための材料に関するものである。
従来の技術
従来、マイクロ波による調理では通常の調理の
ように食品に焦げ目をつけることができず通常の
調理法に比べ風味が及ばなかつた。そのため従
来、食品容器内にマイクロ波によつて特に加熱を
受ける様な膜や層を組み込むことによつて食品に
焦げ目をつける工夫その他がなされている。例え
ば、酸化すずのような半導体の薄層を陶器容器に
施す例(特開昭50−9132号公報、特開昭50−9133
号公報)、食品自体に二糖類同様にアルミニウム
箔を施す例(特開昭50−84391号公報)、食品自体
に二糖類などの焦げ目のつき易い可食物を塗布す
る例(特開昭51−95144号公報、特開昭51−95145
号公報)、基材シートにアルミニウム膜を蒸着す
る例(特開昭53−99280号公報)、炭素物質の被加
熱体を用いる例(特開昭56−42022号公報、特開
昭56−44534号公報)、更には、非常に薄い導電性
フイルムを使用した例(特公昭60−15548号公報)
などがある。
しかし、これらの方法では十分な加熱効果や焦
げ目つけが行われず、またそれ自体が加熱のため
焦げる等の問題があり、またコスト的にも高いと
いう問題があつた。
発明が解決しようとする課題
本発明者等は、かかる現状に鑑み、鋭意研究し
た結果、導電性物質、耐熱性顔料及び繊維からな
る導電性シートに耐熱絶縁性保護層を設けると発
熱性が良好で、発熱シート自体が焦げることなく
食品に焦げ目をつけることができることを見出
し、本発明を完成させるに至つた。
本発明の目的は使い捨て用の安価な紙製食品容
器材料を提供することにある。他の目的はマイク
ロ波調理において、食品に焦げ目をつけたり、食
品の加熱を促進し、発熱シート自体が焦げるなど
しない耐熱性の改良された発熱シートを提供する
ことにある。
課題を解決するための手段
本発明は、導電性物質、耐熱性顔料および繊維
を含有する導電性シートの少なくとも片面に耐熱
絶縁性保護層を設けたことを特徴とするマイクロ
波調理用加熱促進材である。
本発明の加熱促進材は、電子レンジ等マイクロ
波で食品を調理する際に、その食品を適用する容
器として使用される。例えば食品容器自体として
使用する例としては、パイなどの食品にきれいな
焦げ目をつける為の受け皿として、また、他の紙
用例としては本発明の加熱促進材上に食品入りの
容器を乗せて加熱することもできる。
また、スープなどの液状食品を電子レンジ調理
する際には、食品は通常対流を起こさない。その
ため、例えば麺類では充分な混合がなされなかつ
たりした。しかし本発明で得られるシートを食品
容器の底部に用いると食品は下から加熱されるた
め対流を生じさせることが可能である。
導電性シートはどの様な方法で形成されても良
いが、例えば通常、不織布、紙などの製造に使用
されている乾式または湿式の抄紙法などが好適に
使用できる。
導電性シート中の繊維および耐熱性顔料と発熱
を起こす導電性物質の割合は絶乾重量比で繊維お
よび耐熱性顔料100重量部に対して導電性物質0.5
重量部から2000重量部の範囲である。これは使用
する導電性物質によつて発熱の程度が異なるため
配合量もその物質によつて異なる。例えば、金属
繊維のように高導電性でかつアスペクト比の高い
導電性物質の場合にはその配合量は0.5〜10重量
部程度の範囲で充分であり、粉体状導電性物質で
は1000〜2000重量部程度の配合が必要となる。
導電性と発熱量との関係は現在のところよくわ
かつていない。一般には、マイクロ波によつて導
電性物質内に渦電流が生じ、その電流が低抗体中
を流れる際に発熱するものと考えられている。
本発明に使用される材料は以下のとおりであ
る。
繊維は導電性物質をシート化するためのバイン
ダーの役割を有するものである。湿式抄紙の場合
を考えるとセルロース繊維が有効であるが加熱促
進材がより高い発熱性を示すような場合は、耐熱
性の高い無機繊維などが好ましい。
以下、用い得る材料の例を掲げる。
セルロース繊維としては抄紙用の木材パルプや
リンターパルプなどがあり、これらのものを単独
あるいは混合して用いる。
また更に、セルロースパルプの他には、木綿な
どの天然繊維、レーヨン、ポリビニルアルコール
系繊維、ポリエステル、ポリアクリロニトリルな
どの化学繊維、ポリエチレン、ポリプロピレンな
どからなる合成パルプ、ロツクウール、ガラス繊
維などの無機繊維などを含有するパルプスラリー
であつてもよい。
導電性物質は電子レンジ用加熱促進材の発熱を
起こすための物質である。導電性が高くかつアス
ペクト比の高い金属繊維が好ましいが他の物質で
も使用できる。
以下、用いられる物質の例を示す。
スチール、ステンレススチール、銅、アルミニ
ウム、ニツケル、ニツケルクロムなどの金属や酸
化すず、酸化アンチモンなどの金属酸化物の繊
維、粉粒体またはウイスカー、それらの金属や金
属酸化物がコーテイングされた繊維、粉粒体また
はウイスカー、カーボンや還元性雰囲気カーボン
や還元性雰囲気下で焼成されて導電性を付与され
た無機及び有機物質などの繊維、ウイスカー、ま
たは粉粒体などがあり、これらのものを単独ある
いは混合して用いる。
本発明の導電性シートは、原紙の白色度を向上
させ、印刷する場合の適性を向上させたり、不燃
性を付与させる等のために、填料を含有する。そ
の場合、填料は耐熱性を有していれば特に限定は
なく、通常抄紙に使用されているもの何れでも用
いることができる。
好ましい填料としては水酸化アルミニウム、ド
ーソナイト、水酸化カルシウム、水酸化マグネシ
ウム、炭酸カルシウム、石膏、アルミン酸カルシ
ウム、ホウ酸亜鉛、ほう酸バリウム、ほう砂、カ
オリンクレー、みようばん石、塩基性炭酸マグネ
シウムなどの無機含水化合物、パーライト、酸化
アンチモン、赤りん、含モリブデン化合物などの
粉末が考えられる。
湿式抄紙法では、その他必要に応じ、抄紙助剤
として通常使用される紙力増強材、粘剤、サイズ
剤等を用いてもよい。
耐熱絶縁性保護層は、食品と導電性シートとの
接触をさせるための保護層の役割を果たすと共
に、耐濡れ性を付与させたり、導電性シートの発
火を防ぐために空気を遮断するために、少なくと
も導電性シートの片面に設ける必要がある。
耐熱絶縁性保護層の材質としてはポリエチレン
テレフタレート等のポリエステル、ポリサルフオ
ン、ポリメチルペンテン、またはメチルペンテン
共重合体などからなる樹脂フイルム層が挙げられ
る。絶縁性保護層を設ける方法はドライラミネー
ト、押出ラミネートなどいかなる方法でもかまわ
ない。更には、その際に接着性を改良するため導
電性シートにアンカー剤を塗布したり、コロナ処
理などの活性化処理を施してもよい。
実施例
次に本発明を実施例によつて更に詳しく説明す
るが、本発明はこれらの実施例によつて制限され
るものではない。
以下重量比は絶縁乾重量に基づいて表示する。
実施例 1
攪拌している多量の水中にフリーネスが400ml
CSFの針葉樹晒クラフトパルプ47.5重量部と47.5
重量部の水酸化アルミニウム(昭和電工(株)製、H
−42)、5重量部(パルプと水酸化アルミニウム
100重量部当り5.26重量部)の金属ニツケルが表
面にコートされているアクリル繊維及び1重量部
のカチオン性ポリアクリルアミド(以下PAMと
記す)(伯東化学(株)製、R−605)を添加し、数分
間混合する。続いて、0.1重量部のアニオン性
PAMを添加し数分間攪拌しのちに、通常の湿式
抄紙法に従つて抄紙した。その際に分散液濃度は
およそ0.2%であつた。
このシートの両面にPETフイルムを25μm厚で
ラミネートし、電子レンジ用加熱促進材を得た。
実施例 2
攪拌している多量の水中に、30重量部のパル
プ、68重量部の水酸化アルミニウム、2重量部
(パルプと水酸化アルミニウム100重量部当り2.04
重量部)のステンレス繊維(8μm径で3mm長の
SUS304ステンレス繊維)(日本精線(株)製)及び
1重量部のカチオン姓PAMを添加し、数分間混
合する。続いて、0.1重量部のアニオン性PAMを
添加し数分間攪拌したのちに、通常の湿式抄紙法
に従つて抄紙した。
次いで実施例1と同様にPETフイルムをラミ
ネートし、電子レンジ用加熱促進材を得た。
第1表に本発明の加熱促進材を用いて電子レン
ジによる加熱をした場合の効果を示す。
20℃の水道水をパイレツクス製ビーカーに50c.c.
とり、そのビーカーの外側底面に本発明で得られ
た加熱促進材を2.5cm四方の大きさに切つて貼り
つけて、通常の電子レンジで30秒間マイクロ波調
理を行つた。その際の中の水の温度上昇の様子を
調べた。
その結果、何も貼りつけない場合(比較例1)
に比べ、本発明の加熱促進材は温度が上昇するこ
とが、示された。
INDUSTRIAL APPLICATION FIELD OF THE INVENTION The present invention relates to disposable food packaging. In particular, it relates to materials for browning foods when cooking them using microwaves to obtain a flavor similar to that of conventional cooking methods, and for accelerating the heating of liquid foods such as soups. BACKGROUND TECHNOLOGY Conventionally, microwave cooking has not been able to brown foods like normal cooking, and the flavor has not been as good as that of normal cooking methods. For this reason, conventional methods have been used to brown foods by incorporating into food containers a film or layer that is particularly heated by microwaves. For example, a thin layer of a semiconductor such as tin oxide is applied to a ceramic container (JP-A-50-9132, JP-A-50-9133).
(Japanese Unexamined Patent Publication No. 1984-84391), an example of applying aluminum foil to the food itself in the same way as disaccharides (Japanese Patent Application Laid-Open No. 1984-84391), and an example of coating the food itself with an edible material that easily browns, such as a disaccharide (Japanese Unexamined Patent Publication No. 1984-84391). Publication No. 95144, JP-A-51-95145
Examples of vapor-depositing an aluminum film on a base sheet (Japanese Patent Laid-Open No. 53-99280), Examples of using a carbon material to be heated (Japanese Patent Laid-Open Nos. 56-42022, 44534-1983) Furthermore, an example using a very thin conductive film (Japanese Patent Publication No. 15548/1983)
and so on. However, these methods have problems in that they do not provide sufficient heating effects or browning, and that they themselves burn due to heating, and are also expensive. Problems to be Solved by the Invention In view of the current situation, the inventors of the present invention have conducted extensive research and have found that when a heat-resistant insulating protective layer is provided on a conductive sheet made of a conductive substance, a heat-resistant pigment, and fibers, good heat generation properties can be achieved. They discovered that food can be browned without burning the heat-generating sheet itself, leading to the completion of the present invention. An object of the present invention is to provide a disposable, inexpensive paper food container material. Another object of the present invention is to provide a heating sheet with improved heat resistance that browns food, accelerates heating of food, and prevents the heating sheet itself from burning in microwave cooking. Means for Solving the Problems The present invention provides a heating accelerator for microwave cooking, characterized in that a heat-resistant insulating protective layer is provided on at least one side of a conductive sheet containing a conductive substance, a heat-resistant pigment, and fibers. It is. The heating accelerator of the present invention is used as a container for cooking food in a microwave oven such as a microwave oven. For example, it can be used as a food container itself, such as as a saucer for beautifully browning foods such as pies, and for other paper applications, a container containing food can be placed on the heating accelerator of the present invention and heated. You can also do that. Furthermore, when cooking liquid foods such as soup in a microwave, the foods usually do not undergo convection. As a result, for example, noodles were not mixed sufficiently and were sloppy. However, when the sheet obtained according to the present invention is used at the bottom of a food container, the food is heated from below, making it possible to generate convection currents. Although the conductive sheet may be formed by any method, for example, a dry or wet paper-making method that is normally used for manufacturing nonwoven fabrics, paper, etc. can be suitably used. The ratio of the fibers and heat-resistant pigments in the conductive sheet to the conductive substance that generates heat is 0.5 parts by weight of the conductive substance per 100 parts by weight of the fibers and heat-resistant pigments.
The range is from 2000 parts by weight. This is because the degree of heat generation differs depending on the conductive material used, so the amount to be blended also differs depending on the material. For example, in the case of a conductive substance with high conductivity and a high aspect ratio, such as metal fiber, the blending amount is sufficient in the range of about 0.5 to 10 parts by weight, and in the case of a powdered conductive substance, it is sufficient to mix 1000 to 2000 parts by weight. It is necessary to mix approximately parts by weight. The relationship between conductivity and calorific value is currently not well understood. It is generally believed that eddy currents are generated in conductive materials by microwaves, and that heat is generated when the currents flow through the antibodies. The materials used in the present invention are as follows. The fibers serve as a binder for forming a sheet of conductive material. Considering the case of wet paper making, cellulose fibers are effective, but when the heating accelerator exhibits higher heat generation properties, inorganic fibers with high heat resistance are preferable. Examples of materials that can be used are listed below. Examples of cellulose fibers include wood pulp and linter pulp for paper making, and these fibers may be used alone or in combination. Furthermore, in addition to cellulose pulp, there are natural fibers such as cotton, chemical fibers such as rayon, polyvinyl alcohol fibers, polyester and polyacrylonitrile, synthetic pulps such as polyethylene and polypropylene, and inorganic fibers such as rock wool and glass fibers. It may be a pulp slurry containing. The conductive substance is a substance that causes the heating accelerator for microwave ovens to generate heat. Highly conductive and high aspect ratio metal fibers are preferred, but other materials can also be used. Examples of substances used are shown below. Fibers, granules or whiskers of metals such as steel, stainless steel, copper, aluminum, nickel and nickel chrome, metal oxides such as tin oxide and antimony oxide, fibers and powder coated with these metals and metal oxides. There are grains or whiskers, fibers, whiskers, and granules of carbon and inorganic and organic substances that are fired in carbon and reducing atmosphere to give conductivity, and these can be used alone or Mix and use. The conductive sheet of the present invention contains a filler in order to improve the whiteness of the base paper, improve suitability for printing, and impart nonflammability. In that case, the filler is not particularly limited as long as it has heat resistance, and any filler commonly used in paper making can be used. Preferred fillers include aluminum hydroxide, dawsonite, calcium hydroxide, magnesium hydroxide, calcium carbonate, gypsum, calcium aluminate, zinc borate, barium borate, borax, kaolin clay, alumite, and basic magnesium carbonate. Possible powders include inorganic hydrous compounds, perlite, antimony oxide, red phosphorus, and molybdenum-containing compounds. In the wet papermaking method, other paper-making aids such as a paper strength enhancer, a sticky agent, a sizing agent, etc., which are commonly used, may be used as necessary. The heat-resistant insulating protective layer serves as a protective layer for contact between the food and the conductive sheet, and also provides wettability and blocks air to prevent the conductive sheet from catching fire. It is necessary to provide it on at least one side of the conductive sheet. Examples of the material for the heat-resistant insulating protective layer include a resin film layer made of polyester such as polyethylene terephthalate, polysulfone, polymethylpentene, or methylpentene copolymer. The insulating protective layer may be provided by any method such as dry lamination or extrusion lamination. Furthermore, in order to improve adhesion at that time, the conductive sheet may be coated with an anchoring agent or subjected to activation treatment such as corona treatment. EXAMPLES Next, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples. The following weight ratios are expressed based on insulation dry weight. Example 1 400ml of freeness in a large amount of water being stirred
CSF softwood bleached kraft pulp 47.5 parts by weight and 47.5 parts by weight
Part by weight of aluminum hydroxide (manufactured by Showa Denko K.K., H
-42), 5 parts by weight (pulp and aluminum hydroxide)
5.26 parts by weight per 100 parts by weight of acrylic fiber whose surface is coated with nickel metal and 1 part by weight of cationic polyacrylamide (hereinafter referred to as PAM) (manufactured by Hakuto Kagaku Co., Ltd., R-605). , mix for a few minutes. Then, 0.1 part by weight of anionic
After adding PAM and stirring for several minutes, paper was made according to a conventional wet paper making method. At that time, the dispersion concentration was approximately 0.2%. A 25 μm thick PET film was laminated on both sides of this sheet to obtain a heating accelerator for microwave ovens. Example 2 In a large volume of water with stirring, 30 parts by weight of pulp, 68 parts by weight of aluminum hydroxide, 2 parts by weight (2.04 parts by weight per 100 parts by weight of pulp and aluminum hydroxide)
weight part) stainless steel fiber (8 μm diameter and 3 mm length)
SUS304 stainless steel fiber (manufactured by Nippon Seisen Co., Ltd.) and 1 part by weight of cationic PAM were added and mixed for several minutes. Subsequently, 0.1 parts by weight of anionic PAM was added and stirred for several minutes, and then paper was made according to a normal wet paper making method. Next, a PET film was laminated in the same manner as in Example 1 to obtain a heating accelerator for microwave ovens. Table 1 shows the effects of heating in a microwave oven using the heating accelerator of the present invention. Pour 50c.c. of 20℃ tap water into a Pyrex beaker.
The heating accelerator obtained according to the present invention was cut into 2.5 cm square pieces and pasted on the outside bottom of the beaker, and microwave cooking was performed for 30 seconds in a regular microwave oven. We investigated the rise in temperature of the water during this time. As a result, when nothing is pasted (Comparative Example 1)
It was shown that the temperature of the heating accelerator of the present invention increases compared to that of the present invention.
【表】【table】
【表】
発明の効果
以上説明したとおり、本発明の加熱促進材は導
電性シートを製造する際に導電性物質を繊維と耐
熱性顔料とともに混合して抄紙し、該シートの少
なくとも片面に耐熱絶縁性保護層を設けることに
よつて得られ、マイクロ波調理において食品に焦
げ目をつけることができ、また、加熱促進材自体
は焦げたりせず安価にかつ連続的に効率よく耐熱
性の改良された発熱シートを提供するという効果
を奏する。[Table] Effects of the Invention As explained above, the heating accelerator of the present invention is produced by mixing a conductive substance with fibers and a heat-resistant pigment to make paper when manufacturing a conductive sheet, and adding heat-resistant insulation to at least one side of the sheet. By providing a protective layer, it is possible to brown foods in microwave cooking, and the heating accelerator itself does not burn, resulting in improved heat resistance at low cost and continuously. This has the effect of providing a heat generating sheet.
Claims (1)
る導電性シートの少なくとも片面に耐熱絶縁性保
護層を設けたことを特徴とするマイクロ波調理用
加熱促進材。 2 導電性シートが、スチール、ステンレススチ
ール、ニツケルクロム、銅、アルミニウムなどの
金属や、酸化亜鉛、酸化すず、酸化アンチモンな
どの金属酸化物、また、それらの物質がコーテイ
ングされた繊維、ウイスカー、粉粒体、またはカ
ーボンや還元によつて導電性を付与された有機ま
たは無機物質などからなる繊維状または、粉粒状
あるいは燐片状のものから選ばれた導電性物質を
シート中に分散させたものであることを特徴とす
る特許請求の範囲第1項記載のマイクロ波調理用
加熱促進材。 3 耐熱絶縁性保護層が、ポリエステル、ポリサ
ルフオン、ポリメチルペンテン、またはメチルペ
ンテン共重合体などからなる群より選ばれた合成
樹脂からなることを特徴とする特許請求の範囲第
1項または第2項記載のマイクロ波調理用加熱促
進材。 4 耐熱性顔料が、水酸化アルミニウム、ドーソ
ナイト、水酸化カルシウム、水酸化マグネシウ
ム、炭酸カルシウム、石膏、アルミン酸カルシウ
ム、ほう酸亜鉛、ほう酸バリウム、ほう砂、カオ
リンクレー、みようばん石、塩基性炭酸マグネシ
ウムなどの無機含有化合物、またはパーライト、
酸化アンチモン、赤リン、含モリブデン化合物な
どの粉末の中から選ばれることを特徴とする特許
請求の範囲第1項、第2項または第3項記載のマ
イクロ波調理用加熱促進材。 5 繊維が、木材パルプ、リンターパルプのよう
なセルロースパルプ、木綿のような天然繊維、レ
ーヨン、ポリビニルアルコール系繊維、ポリエス
テル、ポリアクリロニトリル、フエノール系繊
維、ふつ素樹脂繊維、メタ系あるいはパラ系アラ
ミド繊維、ポリアミドイミド繊維などの有機繊
維、ポリエチレン、ポリプロピレンなどからなる
合成パルプ、アルミナ繊維、ロツクウール、ガラ
ス繊維の無機繊維から選ばれることを特徴とする
第1項ないし第4項記載のマイクロ波調理用加熱
促進材。[Scope of Claims] 1. A heating accelerator for microwave cooking, characterized in that a heat-resistant insulating protective layer is provided on at least one side of a conductive sheet containing a conductive substance, a heat-resistant pigment, and fibers. 2. The conductive sheet may be made of metals such as steel, stainless steel, nickel chrome, copper, or aluminum, or metal oxides such as zinc oxide, tin oxide, or antimony oxide, or fibers, whiskers, or powder coated with these materials. A sheet in which a conductive material selected from granules, fibers, powders, or flakes made of carbon or organic or inorganic substances imparted with conductivity through reduction is dispersed. The heating accelerator for microwave cooking according to claim 1, characterized in that: 3. Claims 1 or 2, characterized in that the heat-resistant insulating protective layer is made of a synthetic resin selected from the group consisting of polyester, polysulfone, polymethylpentene, methylpentene copolymer, etc. The heating accelerator for microwave cooking described above. 4 Heat-resistant pigments include aluminum hydroxide, dawsonite, calcium hydroxide, magnesium hydroxide, calcium carbonate, gypsum, calcium aluminate, zinc borate, barium borate, borax, kaolin clay, alumite, basic magnesium carbonate, etc. inorganic-containing compounds, or perlite,
The heating accelerator for microwave cooking according to claim 1, 2 or 3, which is selected from powders such as antimony oxide, red phosphorus, and molybdenum-containing compounds. 5 The fibers are wood pulp, cellulose pulp such as linter pulp, natural fibers such as cotton, rayon, polyvinyl alcohol fibers, polyester, polyacrylonitrile, phenolic fibers, fluororesin fibers, meta- or para-aramid fibers. , organic fibers such as polyamide-imide fibers, synthetic pulps made of polyethylene, polypropylene, etc., inorganic fibers such as alumina fibers, rock wool, and glass fibers. Promotion material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-156639A JPH012608A (en) | 1987-06-25 | Heating accelerator for microwave cooking |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-156639A JPH012608A (en) | 1987-06-25 | Heating accelerator for microwave cooking |
Publications (3)
Publication Number | Publication Date |
---|---|
JPS642608A JPS642608A (en) | 1989-01-06 |
JPH012608A JPH012608A (en) | 1989-01-06 |
JPH0582203B2 true JPH0582203B2 (en) | 1993-11-18 |
Family
ID=
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60251059A (en) * | 1984-05-21 | 1985-12-11 | ゴ−ルデン バレ− フ−ズ インコ−ポレ−テツド | Popcorn pack |
JPS6147898A (en) * | 1984-08-10 | 1986-03-08 | 大塚化学株式会社 | Conductive paper |
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60251059A (en) * | 1984-05-21 | 1985-12-11 | ゴ−ルデン バレ− フ−ズ インコ−ポレ−テツド | Popcorn pack |
JPS6147898A (en) * | 1984-08-10 | 1986-03-08 | 大塚化学株式会社 | Conductive paper |
Also Published As
Publication number | Publication date |
---|---|
JPS642608A (en) | 1989-01-06 |
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