CN202923035U - Microwaveable composite flexible package film, automatic-exhaust package film for microwave oven and package bag - Google Patents
Microwaveable composite flexible package film, automatic-exhaust package film for microwave oven and package bag Download PDFInfo
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- CN202923035U CN202923035U CN 201220695256 CN201220695256U CN202923035U CN 202923035 U CN202923035 U CN 202923035U CN 201220695256 CN201220695256 CN 201220695256 CN 201220695256 U CN201220695256 U CN 201220695256U CN 202923035 U CN202923035 U CN 202923035U
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Abstract
The utility model relates to the technical field of flexible package and in particular relates to a package film applicable to the microwave heating of foods and a package bag made of the package film. A microwaveable composite flexible package film is formed by compositing multiple layers of films, the inmost layer of film is a polyethylene film or a casting polypropylene film, and each other layer of films is one or more combination of a biaxially oriented polyester film, a biaxially oriented polypropylene film and a biaxially oriented polyamide. According to an automatic-exhaust package film for a microwave oven made of the microwaveable composite flexible package film, besides the inmost layer of the polyethylene film or the casting polypropylene film, each other layer is provided with a laser treatment area which is burnt through by laser, and micropores generated by the laser treatment are arranged on the polyethylene film or the casting polypropylene film in the laser treatment area. According to the technical scheme in the utility model, the inmost layer of film contains a certain quantity of inorganic filler so that a certain quantity of micropores can be generated by the laser, and the spaces among the micropores are increased during the microwave heating so that automatic 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 micro-wave oven 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, be composited by multilayer film, innermost layer is polyethylene film or cast polypropylene film, 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.
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 polyethylene film or cast polypropylene film, other each layer has the laser treatment zone of being burnt by laser, the micropore that the polyethylene film under the laser treatment zone or cast polypropylene film have laser treatment to produce.The reason that other outer each layer of innermost layer polyethylene film or cast polypropylene film is burnt fully is that they are larger to the absorptivity of the laser of setting wave band, very easily burn, and polyethylene film or cast polypropylene film material are much lower to the absorptivity of this section laser.
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 be shaped as circle, U-shaped, C shape, any one in square, can be also other arbitrary shape, satisfy above width and length requirement and get final product.
Above micro-wave oven automatic vent packaging film with the laser treatment zone is made soft packaging bag by heat-sealable way, and the bag packaging varieties of food items has the zone of at least one place laser treatment on each ripple stove Self-exhaust packing bags.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, hot sealing layer material (PE or CPP) are under the acting in conjunction of temperature and expansive force, and the micropore gap in film is widened, and 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 polyethylene film or cast polypropylene 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 polyethylene film or cast polypropylene film can not be burnt, 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.
A lot of superfine and uniform micropores are arranged in the innermost layer (hot sealing layer) of the utility model micro-wave oven automatic vent packaging film/bag.Micropore quantity is controlled, can not produce seepage.After in bag, food was heated, the pressure that heat and steam produce was widened micropore, and forms a lot of apertures, and the 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 embodiment 1 micropore place, packaging film laser treatment zone.
Fig. 2 is the top view in laser treatment zone on embodiment 1 packaging film.
Fig. 3 is the structural representation of embodiment 1 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/PE, NY/INK/AD/PE, PET/INK/AD/NY/AD/PE, BOPP/INK/AD/NY/AD/PE, PET/INK/AD/CPP, NY/INK/AD/CPP, PET/INK/AD/NY/AD/CPP 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, PE are that special-purpose polyethylene film, CPP is special-purpose cast polypropylene film; 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/PE.As shown in Figure 1,3 is the PET film, the 4th, and printing ink, the 5th, glue, innermost layer 6 is polyethylene films.
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, formation laser treatment zone 2, and the innermost layer polyethylene film is difficult for absorbing the laser of this section wavelength, therefore through after laser treatment, thickness is without significant change, but the micropore 1(of the some that laser treatment produces is arranged referring to Fig. 1 in film), 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, 16 millimeters of the total lengths of laser vestige, thereby 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 in laser treatment zone 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.
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/CPP.
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 is burnt, formation laser treatment zone, innermost layer CPP film is through after laser treatment, and thickness is without significant change, but the micropore of the some that laser treatment produces is arranged in film, micro-pore diameter is 10 ~ 200 microns, circle is made in the laser treatment zone, and the diameter of laser vestige is 8 millimeters, thereby is made into micro-wave oven automatic vent packaging film.Because CPP thickness can not change substantially, and micropore quantity is controlled, therefore the situation of seepage can not occur.
Laser treatment zone 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 circular 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: innermost layer is polyethylene film or cast polypropylene film, and other each layer film is any one 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 polyethylene film or cast polypropylene film, other each layer has the laser treatment zone (2) of being burnt by laser, the micropore (1) that the polyethylene film under the laser treatment zone or cast polypropylene film have 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 201220695256 CN202923035U (en) | 2012-12-17 | 2012-12-17 | Microwaveable composite flexible package film, automatic-exhaust package film for microwave oven and package bag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220695256 CN202923035U (en) | 2012-12-17 | 2012-12-17 | Microwaveable composite flexible package film, automatic-exhaust package film for microwave oven and package bag |
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| CN202923035U true CN202923035U (en) | 2013-05-08 |
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| CN 201220695256 Expired - Lifetime CN202923035U (en) | 2012-12-17 | 2012-12-17 | Microwaveable composite flexible package film, automatic-exhaust package film for microwave oven and package bag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103523349A (en) * | 2013-10-20 | 2014-01-22 | 江苏申凯包装高新技术股份有限公司 | Microwave exhaust bag with zipper |
| CN106313857A (en) * | 2015-07-03 | 2017-01-11 | 杭州顶正包材有限公司 | Manufacturing technique of self-bleeding microwave-heating easy-tear cover film |
-
2012
- 2012-12-17 CN CN 201220695256 patent/CN202923035U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103523349A (en) * | 2013-10-20 | 2014-01-22 | 江苏申凯包装高新技术股份有限公司 | Microwave exhaust bag with zipper |
| CN106313857A (en) * | 2015-07-03 | 2017-01-11 | 杭州顶正包材有限公司 | Manufacturing technique of self-bleeding microwave-heating easy-tear cover film |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130508 |
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| CX01 | Expiry of patent term |