CN202923068U - Microwaveable composite soft packaging film and packaging film/bag capable of exhausting steam automatically after being heated in microwave oven - Google Patents
Microwaveable composite soft packaging film and packaging film/bag capable of exhausting steam automatically after being heated in microwave oven Download PDFInfo
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- CN202923068U CN202923068U CN 201220695280 CN201220695280U CN202923068U CN 202923068 U CN202923068 U CN 202923068U CN 201220695280 CN201220695280 CN 201220695280 CN 201220695280 U CN201220695280 U CN 201220695280U CN 202923068 U CN202923068 U CN 202923068U
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Abstract
The utility model belongs to the technical field of soft packaging and relates to a microwaveable composite soft packaging film. The microwaveable composite soft packaging film consists of a plurality of layers of films in composite way. The microwaveable composite soft packaging film is characterized in that the film of the innermost layer is a double-layer coextruded polypropylene-polyethylene film, and the films of other layers are one or more of a biaxially oriented polyester film, a biaxially oriented polypropylene film and a biaxially oriented polyamide film in the composite way, wherein the polypropylene layer has a thickness of 20 micrometers or more, and the polyethylene layer has a thickness of 10-30 micrometers. The innermost polypropylene layer is provided with a certain amount of micro holes punched by laser, and during heating under microwave, the gaps among the micro holes expand and the polyethylene layer expands and breaks, and thus automatic steam exhaust is achieved.
Description
Technical field
The utility model relates to the soft package technology field, particularly a kind ofly can be used for the packaging film of microwave-oven-heating food and the packaging bag of being made by this packaging film.
Background technology
In recent years, the microwave heating of food, advantage health convenient with it obtains increasingly extensive universal.Food is enclosed in packaging film or puts in packaging bag, puts into microwave-oven-heating, and food can produce a large amount of vapours and accumulate in bag, therefore requires this packaging film or packaging bag can not melt or explosion in high temperature.
Obtain suitable cooking in microwave in order to ensure food, and in order to prevent the packaging bag explosion, but the packaging bag of many microwaves all is provided with exhaust outlet, perhaps artificially packaging film or packaging bag are stung several reach through holes with sharp object, so that the heat that produces in the process of microwave cooking or steam are released.
Chinese invention patent application 200980125949 discloses a kind of packing with laser scored exhaust system.In the packaging film that laser instrument is linear with at least one or non-linear floss hole pattern indentation extremely seals, to form the wall pattern of attenuation.This packaging film can guarantee that normal temperature or freezing lower packaging bag are airtight conditions, prevent that microorganism or oxygen from entering bag, when putting into microwave-oven-heating, heat and steam that in packaging bag, food self produces can break through the laser scored position of packaging film, heat or steam are discharged, prevent explosion.
But, the materials and methods of listing in this patent when Ear Mucosa Treated by He Ne Laser Irradiation or cutting, is difficult to the accurate stable thickness (being the wall pattern thickness of attenuation) of surplus material of controlling at 5 ~ 25 microns, often occur or material is cut off, or surplus material thickness reaches more than 25 microns; And cut, become at follow-up composite soft packaging volume film during the operation such as bag processes, the surplus material of 5 ~ 25 micron thickness is usually broken, thereby obvious seepage situation occurs.Therefore need to carry out further Improvement to packaging film.
The utility model content
But technical problem to be solved in the utility model is to provide a kind of microwave composite soft packaging film.
But another technical problem to be solved in the utility model is to provide the microwave-oven-heating that is used for that this microwave composite soft packaging film of a kind of use makes, and can realize self-bleeding micro-wave oven automatic vent packaging film and packaging bag.
Technical problem to be solved in the utility model is achieved by the following technical programs:
But a kind of microwave composite soft packaging film is composited by multilayer film, and the innermost layer film is double-layer coextrusion polypropylene-polyethylene film, wherein the thickness of polypropylene layer be 20 microns and more than, the thickness of polyethylene layer is 10 ~ 30 microns; Other each layer film is any one or a few compound in biaxially oriented polyester film, bidirectional stretching polypropylene film, two-way stretching polyamide film.
But the micro-wave oven automatic vent packaging film that a kind of above-mentioned microwave composite soft packaging film is made, except innermost layer double-layer coextrusion polypropylene-polyethylene film, other each layer has by the laser treatment of laser penetration zone, the micropore that the polypropylene layer of the double-layer coextrusion polypropylene-polyethylene film under the laser treatment zone has laser treatment to produce.The reason that other each layer except innermost layer double-layer coextrusion polypropylene-polyethylene film is burnt fully is that they are larger to the absorptivity of the laser of setting wave band, very easily burn, and polypropylene film is much lower to the absorptivity of this section laser, so can not burnt, thickness is without significant change.
Further, the diameter of described micropore is 10 ~ 200 microns.
Further, the width in described laser treatment zone is more than or equal to 0.4mm, and total length is more than or equal to 4mm.
Further, described laser treatment zone is shaped as circle, U-shaped, C shape, any one in square.
Above micro-wave oven automatic vent packaging film with the laser treatment zone is made soft packaging bag by heat-sealable way, the bag packaging varieties of food items.The packaging bag that this is airtight need not to open in advance, directly is put in micro-wave oven and heats.Temperature rising along with in-built food produces vapours, and sack is expanded.Bag laser treatment zone with it, the polypropylene layer of innermost layer film is under the acting in conjunction of temperature and expansive force, and the micropore in layer is widened, and forms a lot of apertures, and polyethylene layer is also broken simultaneously, forms a lot of apertures.Steam in bag can be discharged by above-mentioned aperture, has avoided the sack explosion.Thereby realized the microwave-oven-heating automatic ventilating function.
More than through the composite soft packaging film of laser treatment, make packaging bag by the mode of heat-sealing.Packaging bag can be made pre-formed bags on the Bag Making Machine of specialty, the mode of then filling content, then heat-sealing sealing is made; The mode that also can once complete filling content and sealing on shaping, filling, seal packing machine is made.
The utlity model has following beneficial effect:
the utility model utilizes the film of unlike material in laminated film to the difference of the absorptivity of laser, select polypropylene-poly coextrusion casting or coextrusion film blowing technique to make polypropylene-polyethylene film as innermost layer (hot sealing layer) material, select than its more easily absorb specific band laser material film as other the layer, and set suitable laser wavelength, other layer material is burnt by laser, and innermost layer polypropylene-polyethylene film can not be burnt, thickness is substantially unchanged, thereby realize residue film thickness evenly controlled in laser treatment zone on laminated film, can not occur in uneven thickness, cross the situation that seepage appears in thin place.
The utility model has a lot of superfine and uniform micropores in the polypropylene layer of the innermost layer (hot sealing layer) of micro-wave oven automatic vent packaging film, can not produce seepage, after in bag, food is heated, the pressure that heat and steam produce is widened micropore, and forming a lot of apertures, polyethylene layer is also broken simultaneously, forms a lot of apertures, heat in bag and steam can be discharged by above-mentioned aperture, have avoided the sack explosion.Thereby realized the microwave-oven-heating automatic ventilating function.
Description of drawings
Fig. 1 is the longitudinal cross-section enlarged drawing at micropore place, packaging film laser treatment zone.
Fig. 2 is the top view in laser treatment zone on packaging film.
Fig. 3 is the structural representation of the utility model packaging film packaging bag of making.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.Embodiment is only preferred embodiment of the present utility model, is not to restriction of the present utility model.In other embodiments, but the structure of microwave composite soft packaging film can also be BOPP/INK/AD/PP-PE, NY/INK/AD/PP-PE, PET/INK/AD/NY/AD/PP-PE etc. do not contain aluminium foil and the material of aluminizing mould/mould composite membrane.Wherein, PET is that biaxially oriented polyester film, BOPP are that bidirectional stretching polypropylene film, NY are that two-way stretching polyamide film, PP-PE are double-layer coextrusion polypropylene-polyethylene films; INK is printing ink, and inner being imprinted in surface layer film be not when portioned product needs to print, without the INK layer, namely without printing ink; AD is glue, normally polyurethane glue or acrylic acid series glue, dry laminating commonly used or extrude compound/coating processes and each layer film is compound to forms together the composite soft packaging film.
Embodiment 1
But a kind of microwave composite soft packaging film is composited by multilayer film, is followed successively by from outside to inside PET/INK/AD/ PP-PE.3 is the PET film, the 4th, and printing ink, the 5th, glue, innermost layer 6 are double-layer coextrusion PP-PE films, and wherein the thickness of polypropylene layer 61 is 20 microns, and the thickness of polyethylene layer 62 is 25 microns.
But the carbon dioxide laser that is 10250 ~ 10600 nanometers with wavelength on above-mentioned microwave composite soft packaging film is processed, skin-material PET/INK/AD is burnt, form laser treatment zone (2), innermost layer PP-PE film is through after laser treatment, thickness is without significant change, and under high magnified glass, detect thickness is still 45 microns.But the micropore (1) (referring to Fig. 1) that some is arranged in the PP layer, pore-free or a small amount of micropore is only arranged in the PE layer.Micropore (1) diameter is 10 ~ 200 microns, as shown in Figure 2, " U " alphabetical shape is made in the laser treatment zone, 0.5 millimeter of the width of laser vestige, and 16 millimeters of the total lengths of laser vestige, thus be made into micro-wave oven automatic vent packaging film.Because micropore quantity is controlled, the situation of seepage can not appear.
" U " letter shapes of laser region is controlled laser beam scan path by two dimension or three-dimensional special-purpose laser scanning head and is realized; Also can realize by the laser facula of solid shape.The power of laser generator used need to be greater than 30W.
But above microwave composite soft packaging film with the laser treatment zone is once completed filling content and sealing by shaping, filling, seal packing machine, becomes micro-wave oven Self-exhaust packing bags (referring to Fig. 3) is housed.
The present embodiment micro-wave oven Self-exhaust packing bags that is filled with food is taken out from refrigerator, put into the micro-wave oven of 900W power, form with full microwave heated approximately 3 minutes, by observing, can see that packaging bag expands in heating process, see that subsequently hot gas and steam discharges from U-shaped laser treatment zone.Heating after finishing is taken out packaging bag, and the food in packaging bag has reached the temperature and humidity that needs and controlled target.Visually observe, in the laser treatment zone, can find that micropore is widened, and form the aperture of a lot of exhausts.
Embodiment 2
But the present embodiment microwave composite soft packaging film is composited by multilayer film, is followed successively by from outside to inside BOPP/INK/AD/NY/AD/PP-PE.The PP-PE of innermost layer is double-layer coextrusion PP-PE film, and wherein the thickness of polypropylene layer is 25 microns, and the thickness of polyethylene layer is 30 microns.
But the carbon dioxide laser that is 10250 ~ 10600 nanometers with wavelength on above-mentioned microwave composite soft packaging film is processed, skin-material BOPP/INK/AD/NY/AD is burnt, formation laser treatment zone, innermost layer PP-PE film is through after laser treatment, thickness is without significant change, and under high magnified glass, detect thickness is still 55 microns.The micropore that some is arranged in the PP layer, pore-free or a small amount of micropore is only arranged in the PE layer.Micro-pore diameter is 10 ~ 200 microns, and " C " alphabetical shape is made in the laser treatment zone, 0.5 millimeter of the width of laser vestige, and 16 millimeters of the total lengths of laser vestige, thus be made into micro-wave oven automatic vent packaging film.Because micropore quantity is controlled, the situation of seepage can not appear.
Laser region round-shaped controlled laser beam scan path by two dimension or three-dimensional special-purpose laser scanning head and realizes; Also can realize by the laser facula of solid shape.The power of laser generator used need to be greater than 30W.
But above microwave composite soft packaging film with the laser treatment zone is once completed filling content and sealing by shaping, filling, seal packing machine, becomes the micro-wave oven Self-exhaust packing bags is housed.
The present embodiment micro-wave oven Self-exhaust packing bags that is filled with food is taken out from refrigerator, put into the micro-wave oven of 900W power, form with full microwave heated approximately 3 minutes, by observing, can see that packaging bag expands in heating process, see that subsequently hot gas and steam discharges from C type laser treatment zone.Heating after finishing is taken out packaging bag, and the food in packaging bag has reached the temperature and humidity that needs and controlled target.Visually observe, in the laser treatment zone, can find that micropore is widened, and form the aperture of a lot of exhausts.
Claims (6)
1. but microwave composite soft packaging film, be composited by multilayer film, it is characterized in that: the innermost layer film is double-layer coextrusion polypropylene-polyethylene film, wherein the thickness of polypropylene layer be 20 microns and more than, the thickness of polyethylene layer is 10 ~ 30 microns, and other each layer film is any one or a few compound in biaxially oriented polyester film, bidirectional stretching polypropylene film, two-way stretching polyamide film.
2. but micro-wave oven automatic vent packaging film that the described microwave composite soft packaging of claim 1 film is made, it is characterized in that: except innermost layer double-layer coextrusion polypropylene-polyethylene film, other each layer has by the laser treatment of laser penetration zone (2), the micropore (1) that the polypropylene layer of the double-layer coextrusion polypropylene-polyethylene film under the laser treatment zone has laser treatment to produce.
3. micro-wave oven automatic vent packaging film according to claim 2, it is characterized in that: the diameter of described micropore is 10 ~ 200 microns.
4. micro-wave oven automatic vent packaging film according to claim 2 is characterized in that: the width in described laser treatment zone is more than or equal to 0.4mm, and total length is more than or equal to 4mm.
5. micro-wave oven automatic vent packaging film according to claim 2 is characterized in that: described laser treatment zone be shaped as circle, U-shaped, C shape, any one in square.
6. the micro-wave oven Self-exhaust packing bags that the described micro-wave oven automatic vent of claim 2 ~ 5 any one packaging film is made, have laser treatment zone, at least one place on each micro-wave oven Self-exhaust packing bags.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220695280 CN202923068U (en) | 2012-12-17 | 2012-12-17 | Microwaveable composite soft packaging film and packaging film/bag capable of exhausting steam automatically after being heated in microwave oven |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220695280 CN202923068U (en) | 2012-12-17 | 2012-12-17 | Microwaveable composite soft packaging film and packaging film/bag capable of exhausting steam automatically after being heated in microwave oven |
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| Publication Number | Publication Date |
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| CN202923068U true CN202923068U (en) | 2013-05-08 |
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| CN 201220695280 Expired - Lifetime CN202923068U (en) | 2012-12-17 | 2012-12-17 | Microwaveable composite soft packaging film and packaging film/bag capable of exhausting steam automatically after being heated in microwave oven |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI511905B (en) * | 2014-04-03 | 2015-12-11 | Howa Sangyo Co Ltd | Air-ventillation structure with a heat-shrinkable tape |
| CN114599590A (en) * | 2019-11-06 | 2022-06-07 | 东洋制罐株式会社 | Bag for microwave oven |
-
2012
- 2012-12-17 CN CN 201220695280 patent/CN202923068U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI511905B (en) * | 2014-04-03 | 2015-12-11 | Howa Sangyo Co Ltd | Air-ventillation structure with a heat-shrinkable tape |
| CN114599590A (en) * | 2019-11-06 | 2022-06-07 | 东洋制罐株式会社 | Bag for microwave oven |
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Granted publication date: 20130508 |
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| CX01 | Expiry of patent term |