CN1309070A - Packed food and container for packed food - Google Patents
Packed food and container for packed food Download PDFInfo
- Publication number
- CN1309070A CN1309070A CN01103047.XA CN01103047A CN1309070A CN 1309070 A CN1309070 A CN 1309070A CN 01103047 A CN01103047 A CN 01103047A CN 1309070 A CN1309070 A CN 1309070A
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- China
- Prior art keywords
- food
- container
- sealed
- sealing layer
- air extractor
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/22—Details
- B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
- B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
- B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2205/00—Venting means
- B65D2205/02—Venting holes
Abstract
The present invention provides a packaged food and a container for packaging food, in which a hole-sealing sheet which seals a vent hole formed at a portion of the container cannot so easily be peeled off but, when the food is heated by an microwave oven, the hole-sealing sheet automatically comes off at the time when the food contained in the container has reached the adequately cooked state. The packaged food of the present invention is produced by enclosing food, which contains water or an aqueous solution by an amount suitable for heating by an microwave oven, in the container for packaging food, the container for packaging food having, on one side thereof, a surface portion made of plastic sheet, at least one vent hole being formed in the vicinity of the center of the surface portion, the vent hole being sealed by an adhesive hole-sealing sheet whose vertical peeling strength is no less than 1 N/cm in the temperature range of 40 DEG C. or lower and is no higher than 0.1 N/cm at the temperature range of 80 DEG C. or higher.
Description
The present invention relates to food enclosed in sealed, this food enclosed in sealed is to form by non-freezing or frozen food is encapsulated in the airtight container, and can the direct heating cooking in micro-wave oven.The present invention also relates to a kind of container of food enclosed in sealed, aforesaid food can be encapsulated in this container and store.
Normally known by unfrozen food prod (i.e. food at room temperature) or frozen food being encapsulated in the food enclosed in sealed that stores in the container.And know that when this food enclosed in sealed was heated, the pressure in the parcel increased greatly in micro-wave oven, increased the possibility of this parcel blast.So, a kind of technology of exploding of preventing has been proposed now, in the container of food enclosed in sealed, form many holes, so that each hole is covered (Japanese Utility Model 62-69466) by a rounded seal that is coated with lining cement.Similarly, released a kind of like this technology, wherein in the container of food enclosed in sealed, form many holes, and additional one deck valve plate, so that by applying first lining cement and second lining cement seals each hole, the described first lining cement fusing point is low, this fusing point is corresponding to food heating-up temperature in the scope between described hole periphery and valve plate end periphery, and described second lining cement can not melt (Japanese Utility Model 63-156978) in the low melting point lining cement part both sides that applied under the heating-up temperature of food.
Between the period of heating, these known technologies are useful to preventing to explode at micro-wave oven.Yet, in these conventional techniques, there is such problem, promptly just be opened by hole before the abundant heating at food, this can cause uneven heating, perhaps these holes are opened too late, cause that food is dried or burnt.These problems never are resolved.So, in the food enclosed in sealed that needs the micro-wave oven cooking, a kind of hermetically-sealed construction of hole need be provided, wherein, the steam that is produced by heated food is held suitable a period of time, and do not allow described steam to escape into the outside too early, only after food is by abundant heating, can be discharged this sealing., for each food, determine that the preferred air-proof condition of Kongzui is not easily.In addition, thisly be assumed to be the structure that most preferred hermetically-sealed construction tends to have a kind of complexity.In brief, prior art is not also successfully developed a kind of economical and practical technology that satisfies above-mentioned requirements.
In order to satisfy above-mentioned requirements, the present invention plans to provide a kind of hermetically-sealed construction of economy, and wherein, when food was ripe by the micro-wave oven cooking, the hole sealing layer of the air extractor vent on the encapsulation containers for food use came off automatically in opportune moment.
First purpose of the present invention provides a kind of food enclosed in sealed, wherein when container is preserved in room temperature or is under freezing conditions preserved, the hole sealing layer of the air extractor vent that covering container part place forms is not easy to come off, but, when food heats by micro-wave oven, when the food in being encapsulated in container had reached a kind of sufficient cooking status in fact, this hole sealing layer came off automatically.
Second purpose of the present invention provides a kind of container of food enclosed in sealed, this container is provided with at least one air extractor vent, and be used for producing a kind of food enclosed in sealed by food enclosed in sealed therein, wherein, when container is preserved in room temperature or is under freezing conditions preserved, the hole sealing layer that covers air extractor vent in described container can not be easy to come off, but, when food heats by micro-wave oven, when the food in being encapsulated in container had reached a kind of sufficient cooking status in fact, this hole sealing layer came off automatically.That is to say that second purpose of the present invention provides a kind of container of food enclosed in sealed, by select the various heating conditions of the adaptation of micro-wave oven neatly on function according to packaged food, this container can be realized the most preferred heating of food.
Can reach the food enclosed in sealed of the present invention of aforementioned first purpose, it is characterized in that, the food that comprises the water or the aqueous system is encapsulated in the container, this container has a surface portion of being made by plastic layer in the one side, near the center of described surface portion, form at least one air extractor vent, described air extractor vent is by the hole sealing layer sealing of a band lining cement, its vertical peel strength is not less than 1N/cm in 40 ℃ or lower range of temperatures, and its vertical peel strength is not higher than 0.1N/cm in 80 ℃ or higher range of temperatures.
Further, the present invention's hole sealing layer of being used for the container of food enclosed in sealed is preferably made by the white building paper as base material.And be preferably in the air extractor vent that forms in the described container and seal, so that in the sealing layer of described hole, have the periphery that the adhesive linkage of inhomogeneous width covers described air extractor vent by described hole sealing layer.
Fig. 1 is illustrated in the air extractor vent section drawing partly that the container cover that is used for food enclosed in sealed of the present invention forms;
Fig. 2 is a transparent view, and it expresses the structure of the container of food enclosed in sealed of the present invention.
Food enclosed in sealed plan representative of the present invention is a kind of can be by the food enclosed in sealed of the microwave-oven-heating cooking. In the container of food enclosed in sealed, be provided with at least one passage, with the pressure of convenient container inside in the heated food process owing to container in the generation of the increase of volume of air and steam when increasing, reduce the pressure of described increase by discharging described steam, pre-blastproof generation. In the present invention, passage seals by the hole sealant with bonding agent on it. That is, the present invention is by utilizing and improving general technology and realize.
During the cooking, the food in the container must fully be heated. So the pressure in container will be elevated to the steam pressure consistent with the food temperature inevitably, this is because the cause that this container inner pressure increases when temperature in the container raises. Under the circumstances, known current techique so that the adhesive strength of hole sealant relatively a little less than, perhaps provide adhesive strength relatively weak part (passage peripheral part or similar portions), when having uprised with the pressure in the convenient container, described hole sealant comes off easily. In other words, this current techique expects that this hole sealant works as a pressure safety valve.
The present inventor is devoted to study this problem diligently, namely is not easy to produce preferred this problem of cooking completion status by the heating consistent with the pressure drag characteristic of described hole sealant. The result of research is that the inventor has been found that the pressure drag characteristic of hole sealant can change by the adhesive strength temperature characterisitic of regulating bonding agent (this bonding agent is used for adhering to described hole sealant). Finished the present invention according to this discovery.
The container that the present invention is used for packaged food can have a box-like shape or bag shape shape. That is to say, the shape of container is not limited to any specific form, as long as this container is to adopt the material of air-tightness, watertightness, oil resistivity and heat resistance excellence to make, and can transmit electromagnetic wave and have suitable mechanical strength, then any structure all can be accepted. , at least one side of described container must be made by plastic layer. Preferably transparent by this surface that plastic layer is made, in order to can see the thing of the inside.
As mentioned above, the embodiment for the plastics of making container comprises: include polypropylene, polyester, polysulfones, polyamide (nylon), Merlon or analog as homogenous material layer or the composite layer of key component; And a laminate layers composite bed, wherein aforesaid homogenous material or composite layer combine with polyacrylate, polyvinylidene chloride, polyvinyl alcohol or analog.
An air extractor vent forms on the plastic layer surface of being made by previous materials.With regard to the food in the even heating container, described air extractor vent forms (comparing with its length/width size the relative little platypelloid type container near the center of upper surface for height) near being preferably in the center of container of packaged food.Described hole can have Any shape, and for example circular, oval, avette or polygon is suitable as long as this shape its objective is for realization.The diameter in hole is preferably about 5mm, but is not particularly limited.
Be similar to above-mentioned plastic layer, the hole sealing layer of sealing air extractor vent is preferably made by having fabulous air-tightness, water tightness, fuel resistance and stable on heating base material.The embodiment of this base material comprises the layer of being made by polyester, polypropylene or analogue, synthetic paper that is made of plastics and building paper.Best described hole sealing layer itself is difficult to produce heat when heating by electronic microwave, and when it absorbed infrared ray, temperature did not raise yet.The hole sealing layer has the al deposition layer on it, so that reflect above-mentioned microwave, and this hole sealing layer is colourless, and especially, white is highly preferred.The hole sealing layer can have any suitable shape, as circular or oval.Its diameter is preferably about 10mm, but is not limited to this size.
The lining cement that the hole sealing layer is connected in the air extractor vent that forms in the above-mentioned plastic layer must be the lining cement that has viscosity with respect to plastic layer, that is, be a kind of pressure-sensitive adhesive.The embodiment of this pressure-sensitive adhesive comprises natural rubber, neoprene.Pressure-sensitive adhesive is preferred especially the employing, this pressure adhesive is to make by this material that viscosity is provided of styrene butadiene type rubber (buna-S) and acrylic type rubber and colophony type or petroleum resin type is mixed, so that have excellent pressure-sensitive character and sensitive characteristic.
Aforesaid pressure-sensitive adhesive of the present invention need have sensitive characteristic, wherein its vertical peel strength is not less than 1N/cm in 40 ℃ or lower range of temperatures, preferably be not less than 2N/cm, its vertical peel strength is not higher than 0.1N/cm in 80 ℃ or higher range of temperatures.Be sealed in the air extractor vent that forms in the plastic layer by applying the hole sealing layer that the back side is coated with the pressure-sensitive adhesive that satisfies aforementioned condition or characteristic, the food of described hole sealing layer in being packaged in container just can be opened after well-done fully by heating.
It should be noted that, numerical value under the aforementioned condition is not the intrinsic numerical value of lining cement itself, because this numerical value according to the standard lining cement method of measurement of industrial implementation and similar approach (for example is, in JIS Z0237, describe) and obtain, but with respect to the plastic layer of the container of the food enclosed in sealed that has an air extractor vent, the sensitive characteristic of the bind strength of this numeric representation hole sealing layer.So should arouse attention, this is whether not satisfy the aforementioned condition of bind strength characteristic because know a kind of pressure-sensitive adhesive usually with respect to a kind of specific polyester layer, and whether satisfies described bind strength characteristic condition with respect to 6 layers of a kind of specific nylon.
Further, described adhesion properties condition will be applied on the container of food enclosed in sealed, and this container is configured to receive prevailing food, promptly contains water or the aqueous system with proper proportion and is adapted to pass through the food of micro-wave oven heating.This " prevailing food " comprises delicatessen, for example dinner, fast food, half-mature food and analogue.So, be heated to the food of the relatively-high temperature that is not less than 100 ℃ or need only be heated to 40-60 ℃ food for needs, need be chosen in the pressure-sensitive adhesive in the aforementioned condition scope with better bind strength characteristic.Yet further, needless to say, be not suitable for food by the micro-wave oven heating such as dry food or analogue outside scope of the present invention.
To the present invention be described according to the preferred embodiments of the present invention below.
In Fig. 1, food containers of mark mark 1 expression, this container is made by mold pressing one layer of polycarbonate.A composite bed or an analogue of being made by suitable material can be provided in food containers 1.2 expressions of mark mark are by 6 layers of flexible cover of making of nylon.Lid 2 peripheral part be designed to by melt bonding or lining cement bonding, this peripheral part can be fixed to the marginal portion 1 ' of food containers 1.Near the center of lid 2, form a round vent 3.Described air extractor vent 3 is hermetic sealed by the hole sealing layer 4 of circle.
The sticking formation of pressure-sensitive adhesive layer 5 that is applied on 6 layers of the nylon is provided at the back side of described hole sealing layer 4, so that oval-shaped non-bonded part divides 5 ' to form at the core of described formation of pressure-sensitive adhesive layer 5 substantially.In described formation of pressure-sensitive adhesive layer 5, make that the width of coating pressure-sensitive adhesive part is inhomogeneous.Further, the center of air extractor vent 3 does not need to overlap with the center of hole sealing layer 4.At the slight mis-aligned about 1-2mm between the center of the center of air extractor vent 3 and hole sealing layer 4 is relative preferred, because this slight deviations helps to peel off described hole sealing layer 4 in the failure-free mode.
Here used hole sealing layer 4 is produced like this: the synthetic paper that preparation is made by polyester is as base material, and its thickness is 60 μ m, and scribbles coated white surface thereon; Acrylic type pressure-sensitive adhesive a is coated on the described base material, and consequently the thickness of described adhesion agent a is 25 μ m, forms described formation of pressure-sensitive adhesive layer 5 thus.In order to compare, be coated in respectively and produce a hole sealing layer 4b and hole sealing layer 4c on the described base material by acrylic type pressure-sensitive adhesive b or styrene butadiene fundamental mode pressure-sensitive adhesive c with other, so that the thickness of adhesion agent b and adhesion agent c is 25 μ m, and on each hole sealing layer 4b and hole sealing layer 4c, form formation of pressure-sensitive adhesive layer in the mode that is similar to hole sealing layer 4a.
Aforementioned pressure-sensitive adhesive a, b, c distinguish measured with respect to the bind strength characteristic of 6 layers of nylon.The result is as follows:
Table 1
Bind strength (10 with respect to 6 layers of nylon
-2N/cm)
| Temperature (℃) | ??30 | ??40 | ??50 | ??60 | ?70 | ?80 | ?90 |
| Pressure-sensitive adhesive a | ?300 | ?190 | ?110 | ??38 | ?13 | ??8 | ??5 |
| Pressure-sensitive adhesive b | ?220 | ??85 | ??43 | ??18 | ??9 | ??2 | ??- |
| Pressure-sensitive adhesive c | ?350 | ?240 | ?175 | ?130 | ?92 | ?63 | ?42 |
By with pressure-sensitive adhesive a, pressure-sensitive adhesive b and pressure-sensitive adhesive c coated substrates material described hole sealing layer 4a, 4b and each sticking being applied on the air extractor vent 3 of 6 layers of lid, particularly for foodstuff containers of making 2 of nylon that all be stamped of 4c of making respectively, so that seal described air extractor vent 3 (except the sealing layer of hole, three kinds of food containers of three kinds of used here adhesion agent have identical substantially structure), produce the container of the present invention of food enclosed in sealed A and the food enclosed in sealed B of embodiment and the container of C as a comparison thus.Each container for food enclosed in sealed A, B and C is prepared five samples.The freezing steamed dumplings of 210 grams hermetic is packaged in each container, and by using micro-wave oven to carry out the cooking experiment, this micro-wave oven satisfies the micro-wave oven output valve measurement standard of describing among the JIS Z9212.Obtain the result shown in the table 2.
Table 2
The experiment of food enclosed in sealed cooking
| Food containers | The hole sealing layer peel off required time (minute) | State behind the food cooking |
| ????A ????B ????C | ???????4.5-5.0 ???????3.5-4.0 ???????7.0-7.5 | All adding earnest portion is not equably dryouied by abundant area of heating |
Can recognize from top result, when described food enclosed in sealed heats by micro-wave oven, adopt the food enclosed in sealed of the present invention of the container preparation of food enclosed in sealed of the present invention to prevent that reliably its hole sealing layer from not peeling off when food is fully heated.In the present invention, only the hole sealing layer is just peeled off when food reaches a kind of suitable cooking status and produces abundant steam, because this steam, the temperature of air extractor vent part has reached the temperature that described pressure-sensitive adhesive is peeled off.So, when spraying, steam stops the operation of micro-wave oven, and just can not this food of excessive heat.
As mentioned above, in the described container of encapsulation food of the present invention, produce food enclosed in sealed of the present invention by the packaging for foodstuff that will have the water or the aqueous system, this container of food enclosed in sealed has a surface portion of being made by plastic layer in the one side, near the center of this surface portion, form at least one air extractor vent, this air extractor vent is by the sealing of a kind of lining cement hole sealing layer, its vertical peel strength is not less than 1N/cm in 40 ℃ or lower range of temperatures, and its vertical peel strength is not higher than 0.1N/cm in 80 ℃ or higher range of temperatures.When heating food enclosed in sealed of the present invention by micro-wave oven, after food was fully heated, its hole sealing layer was peeled off automatically.So can not appear at does not have before the abundant cooking stripping aperture sealing layer or peels off the situation that causes the food excessive heat owing to the hole sealing layer too late.In other words, the present invention has reached excellent effect, can be easy to obtain the suitably food of the cooking.
Claims (5)
1. food enclosed in sealed, it is characterized in that, the food that has the water or the aqueous system is packaged in the container, this container has a surface portion of being made by plastic layer, form at least one air extractor vent at described surface portion, this air extractor vent is by a kind of lining cement hole sealing layer sealing, and the vertical peel strength of sealing layer is not less than 1N/cm in 40 ℃ or lower range of temperatures, and its vertical peel strength is not higher than 0.1N/cm in 80 ℃ or higher range of temperatures.
2. the container of a food enclosed in sealed, it is characterized in that, described container has a surface portion of being made by plastic layer, form at least one air extractor vent at described surface portion, this air extractor vent is sealed by a kind of lining cement hole sealing layer, the vertical peel strength of sealing layer is not less than 1N/cm in 40 ℃ or lower range of temperatures, and its vertical peel strength is not higher than 0.1N/cm in 80 ℃ or higher range of temperatures.
3. food enclosed in sealed container as claimed in claim 2 is characterized in that, at least one air extractor vent is near the center of the surface portion that is formed at this container one side.
4. as claim 2 or 3 described food enclosed in sealed containers, it is characterized in that described hole sealing layer seals described air extractor vent, make the described bond layer of the inhomogeneous width on the sealing layer of described hole cover the periphery of this air extractor vent.
5. as each described food enclosed in sealed container in the claim 2 to 4, it is characterized in that described hole sealing layer is made of the white building paper as base material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000023830A JP3707977B2 (en) | 2000-02-01 | 2000-02-01 | Packaged food and packaged food containers |
| JP023830/2000 | 2000-02-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1309070A true CN1309070A (en) | 2001-08-22 |
| CN1118424C CN1118424C (en) | 2003-08-20 |
Family
ID=18549929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01103047.XA Expired - Fee Related CN1118424C (en) | 2000-02-01 | 2001-02-01 | Packed food and container for packed food |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20010012530A1 (en) |
| EP (1) | EP1127810B1 (en) |
| JP (1) | JP3707977B2 (en) |
| CN (1) | CN1118424C (en) |
| DE (1) | DE60101487T2 (en) |
| HK (1) | HK1038542A1 (en) |
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-
2000
- 2000-02-01 JP JP2000023830A patent/JP3707977B2/en not_active Expired - Fee Related
-
2001
- 2001-01-24 DE DE60101487T patent/DE60101487T2/en not_active Expired - Fee Related
- 2001-01-24 EP EP01300620A patent/EP1127810B1/en not_active Expired - Lifetime
- 2001-01-30 US US09/771,878 patent/US20010012530A1/en not_active Abandoned
- 2001-02-01 CN CN01103047.XA patent/CN1118424C/en not_active Expired - Fee Related
- 2001-12-27 HK HK01109074A patent/HK1038542A1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103562092A (en) * | 2011-05-23 | 2014-02-05 | 株式会社细川洋行 | Package bag for microwave cooking |
| CN103562092B (en) * | 2011-05-23 | 2015-08-19 | 株式会社细川洋行 | Cooking by microwave oven packaging bag |
Also Published As
| Publication number | Publication date |
|---|---|
| US20010012530A1 (en) | 2001-08-09 |
| EP1127810A2 (en) | 2001-08-29 |
| DE60101487T2 (en) | 2004-06-09 |
| HK1038542A1 (en) | 2002-03-22 |
| JP2001213483A (en) | 2001-08-07 |
| EP1127810A3 (en) | 2001-09-05 |
| CN1118424C (en) | 2003-08-20 |
| EP1127810B1 (en) | 2003-12-17 |
| JP3707977B2 (en) | 2005-10-19 |
| DE60101487D1 (en) | 2004-01-29 |
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| ASS | Succession or assignment of patent right |
Owner name: CO., LTD. ZAC Free format text: FORMER OWNER: SHOKO HIYOSHI Effective date: 20030509 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20030509 Address after: Tokyo, Japan Applicant after: ZAC K. K. Address before: Tokyo, Japan Applicant before: Nichiyashi Shoko |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
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