CN102991061A - Microwaveable compound flexible package membrane and automatic gas discharging package membrane/bag of microwave oven - Google Patents
Microwaveable compound flexible package membrane and automatic gas discharging package membrane/bag of microwave oven Download PDFInfo
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- CN102991061A CN102991061A CN201210544954XA CN201210544954A CN102991061A CN 102991061 A CN102991061 A CN 102991061A CN 201210544954X A CN201210544954X A CN 201210544954XA CN 201210544954 A CN201210544954 A CN 201210544954A CN 102991061 A CN102991061 A CN 102991061A
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Abstract
The invention relates to the technical field of a flexible package. A microwaveable compound flexible package membrane is formed by compounding a plurality of layers of membranes; a thin film on the innermost layer is a polypropylene-polyethylene thin film which is made from by two materials including polypropylene and polyethylene; the thin film is formed by a co-extrusion curtain coating or a co-extrusion membrane blowing process of the polypropylene-polyethylene; the thickness of a polypropylene layer is 20 microns or more and the thickness of a polyethylene layer is 10-30 microns; the polypropylene layer contains 0.01-0.5% of inorganic filler; the inorganic filler is at least one of titanium dioxide, calcium carbonate and silicon dioxide with the grain diameter of 30-700 nanometers; and other thin films of each layer are any one or the compounding of more of a two-way stretching polyester thin film, a two-way stretching polypropylene thin film and a two-way stretching polyamide thin film. The polypropylene on the innermost layer contains a certain amount of the inorganic fillers so that a certain quantity of micro-pores can be punched by laser, a micro-pore gap is enlarged in a microwave heating process and the automatic gas discharging is realized.
Description
Technical field
The present invention relates to the soft package technology field, particularly a kind of packaging film that can be used for microwave-oven-heating food reaches the packaging bag of being made by this packaging film.
Background technology
In recent years, the microwave heating of food advantage convenient with it, health obtains increasingly extensive popularizing.Food is enclosed in the packaging film or puts in the packaging bag, puts into microwave-oven-heating, and food can produce a large amount of vapours and accumulate in the bag, therefore requires this packaging film or packaging bag can not melt or explosion in high temperature.
In microwave, obtain suitable cooking 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, food self produces in the packaging bag heat and steam 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 thickness (being the wall pattern thickness of attenuation) of accurate stable control surplus material 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.And laser cutting speed is 0.36 meter per second in this patent, and speed of production is slower.Therefore need to carry out further Improvement to the material of packaging film.
Summary of the invention
But technical problem to be solved by this invention provides a kind of microwave composite soft packaging film.
But another technical problem to be solved by this invention provides the microwave-oven-heating that is used for that this microwave composite soft packaging film of a kind of usefulness makes, and can realize self-bleeding micro-wave oven automatic vent packaging film and packaging bag.
Technical problem to be solved by this invention is achieved by the following technical programs:
But a kind of microwave composite soft packaging film, be composited by multilayer film, the innermost layer film is the common polypropylene-polyethylene film that forms of polypropylene and polyethylene bi-material, this film is made by polypropylene-poly coextrusion casting or coextrusion film blowing technique, wherein the thickness of polypropylene layer be 20 microns and more than, the thickness of polyethylene layer is 10 ~ 30 microns, wherein contain 0.01 ~ 0.5% inorganic filler in the polypropylene layer, what described inorganic filler was particle diameter in the titanium dioxide of 30 ~ 700 nanometers, calcium carbonate, silica is at least a; Other each layer film is any one or a few compound in biaxially oriented polyester film, bidirectional stretching polypropylene film, the 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 polypropylene-polyethylene film, other each layer has the laser treatment zone of being burnt by laser, the micropore that the polypropylene layer of the polypropylene-polyethylene film under the laser treatment zone has laser treatment to produce.The reason that other each layer except innermost layer 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 the polypropylene film material is much lower to the absorptivity of this section laser, so can not burnt, thickness is without significant change.Why in poly-the third thin layer, produce micropore, because preparation has added an amount of inorganic filler during laminated film in poly-the third layer material, inorganic filler is so that refraction and scattering process appear in laser in the innermost layer film, the distribution that is laser becomes inhomogeneous, thereby so that film micropore occurs under the effect of laser.Owing to only need to get micropore with laser in film, and inorganic filler self just belongs to the interior pre-buried defective of film, therefore, the demand of laser power become much smaller, and namely under the laser generator with power, it is faster that laser scanning speed can become.Simultaneously, polypropylene is compared with polyethylene, and is higher to the absorptivity of the laser of setting wave band, and only need micropore is controlled at polypropylene layer, therefore the innermost layer film of this patent can use lower laser power when laser treatment, namely can obtain faster efficient.
Further, the diameter of described micropore is 10 ~ 200 microns.
Further, use carbon dioxide laser during described laser treatment, optical maser wavelength is 10250 ~ 10600 nanometers.
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, in square any one.
More than with the micro-wave oven automatic vent packaging film in laser treatment zone, make 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 the 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 the layer is widened, and forms a lot of apertures, and polyethylene layer is also broken simultaneously, forms a lot of apertures.Steam in the 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 at the Bag Making Machine of specialty, and then the filling content seals the mode of sealing again and makes; The mode that also can once finish filling content and sealing on shaping, filling, seal packing machine is made.
The present invention has following beneficial effect:
The present invention utilizes the film of unlike material in the 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 film than the material of its easier absorption specific band laser as other 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 the residue film thickness in laser treatment zone is evenly controlled on the realization laminated film, the situation that seepage appears in place in uneven thickness, excessively thin can not appear.
The present invention adds the inorganic filler of some in the polypropylene layer of the innermost layer (hot sealing layer) of micro-wave oven automatic vent packaging film, therefore pre-buried a lot of superfine and uniform pore defects in thin-film material.Above polypropylene layer at a large amount of micropores of material internal generation size at 10 ~ 200 microns, but can not produce seepage through after the laser treatment.
Inorganic filler in the innermost layer of micro-wave oven automatic vent packaging film of the present invention is to the refraction of laser and the pre-buried defective effect of scattering process and inorganic filler, so that this product is when carrying out laser treatment, the Ear Mucosa Treated by He Ne Laser Irradiation intensity (power) that unit are needs becomes much smaller, during namely with the laser generator of power, can use faster laser scanning speed.Simultaneously, polypropylene is compared with polyethylene, and is higher to the absorptivity of the laser of setting wave band, and only need micropore is controlled at polypropylene layer, therefore the innermost layer film of this patent can use lower laser power when laser treatment, namely can obtain faster efficient.Laser cutting during Laser Processing can reach 1.8 ~ 5 meter per seconds, and production efficiency is higher.
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 the packaging film.
Fig. 3 is the structural representation of the packaging film of the present invention packaging bag of making.
The specific embodiment
The present invention will be described in detail below in conjunction with drawings and Examples.Embodiment only is preferred embodiment of the present invention, is not limitation of the invention.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 by the PP(polypropylene) and the PE(polyethylene) the common film that forms of bi-material; INK is printing ink, and inner being imprinted in the surface layer film be not when portioned product needs to print, then 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, printing ink, the 5th, glue, innermost layer 6 is PP-PE films, and the PP-PE of innermost layer is the common PP-PE film that forms of polypropylene and polyethylene bi-material, and this film is made by polypropylene-poly coextrusion casting or coextrusion film blowing technique, wherein the thickness of polypropylene layer 61 is 20 microns, the thickness of polyethylene layer 62 is 25 microns, wherein contains 0.2% inorganic filler in the polypropylene layer 61, and inorganic filler is that particle diameter is at the titanium dioxide of 30 ~ 700 nanometers.
But process at the carbon dioxide laser that above-mentioned microwave composite soft packaging film wavelength is 10250 ~ 10600 nanometers, skin-material PET/INK/AD is burnt, form laser treatment zone (2), innermost layer PP-PE film is through after the laser treatment, thickness is without significant change, and detect thickness still is 45 microns under the high magnified glass.But in the PP layer, produced the micropore (1) (referring to Fig. 1) of some, 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 realizes by two dimension or three-dimensional special-purpose laser scanning head control laser beam scan path; Also can realize by the laser facula of solid shape.The power of used laser generator need to be greater than 30W.
But more than with the microwave composite soft packaging film in laser treatment zone, once finish filling content and sealing by shaping, filling, seal packing machine, become micro-wave oven Self-exhaust packing bags (referring to Fig. 3) be 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 about 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 the packaging bag has reached the temperature and humidity control target that needs.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 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 the common PP-PE film that forms of polypropylene and polyethylene bi-material, this film is made by polypropylene-poly coextrusion casting or coextrusion film blowing technique, wherein the thickness of polypropylene layer is 25 microns, the thickness of polyethylene layer is 30 microns, wherein contain 0.02% inorganic filler in the polypropylene layer, inorganic filler is that particle diameter is at the calcium carbonate of 30 ~ 700 nanometers and the mixture of silica.
But process at the carbon dioxide laser that above-mentioned microwave composite soft packaging film wavelength is 10250 ~ 10600 nanometers, skin-material BOPP/INK/AD/NY/AD is burnt, formation laser treatment zone, innermost layer PP-PE film is through after the laser treatment, thickness is without significant change, and detect thickness still is 55 microns under the high magnified glass.But in the PP layer, produced the micropore of some, 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 realized by two dimension or three-dimensional special-purpose laser scanning head control laser beam scan path; Also can realize by the laser facula of solid shape.The power of used laser generator need to be greater than 30W.
But more than with the microwave composite soft packaging film in laser treatment zone, once finish filling content and sealing by shaping, filling, seal packing machine, become the micro-wave oven Self-exhaust packing bags be 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 about 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 the packaging bag has reached the temperature and humidity control target that needs.Visually observe, in the laser treatment zone, can find that micropore is widened, and form the aperture of a lot of exhausts.
Claims (7)
1. but microwave composite soft packaging film, be composited by multilayer film, it is characterized in that: the innermost layer film is the common polypropylene-polyethylene film that forms of polypropylene and polyethylene bi-material, this film is made by polypropylene-poly coextrusion casting or coextrusion film blowing technique, wherein the thickness of polypropylene layer be 20 microns and more than, the thickness of polyethylene layer is 10 ~ 30 microns, wherein contain 0.01 ~ 0.5% inorganic filler in the polypropylene layer, what described inorganic filler was particle diameter in the titanium dioxide of 30 ~ 700 nanometers, calcium carbonate, silica is at least a; Other each layer film is any one or a few compound in biaxially oriented polyester film, bidirectional stretching polypropylene film, the 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 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 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: use carbon dioxide laser during described laser treatment, optical maser wavelength is 10250 ~ 10600 nanometers.
5. micro-wave oven automatic vent packaging film according to claim 2, it 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.
6. 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, in square any one.
7. the micro-wave oven Self-exhaust packing bags that the described micro-wave oven automatic vent of claim 2 ~ 6 any one packaging film is made has laser treatment zone, at least one place on each micro-wave oven Self-exhaust packing bags.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210544954XA CN102991061A (en) | 2012-12-17 | 2012-12-17 | Microwaveable compound flexible package membrane and automatic gas discharging package membrane/bag of microwave oven |
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| CN201210544954XA CN102991061A (en) | 2012-12-17 | 2012-12-17 | Microwaveable compound flexible package membrane and automatic gas discharging package membrane/bag of microwave oven |
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| CN102991061A true CN102991061A (en) | 2013-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108976610A (en) * | 2018-08-20 | 2018-12-11 | 山东斯兰德环保科技有限公司 | A kind of packaging bag composite material and preparation method thereof for Broiled Dishes instant food |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1822992A (en) * | 2003-07-16 | 2006-08-23 | 美国杜邦泰津胶片合伙人有限公司 | Self - venting polymeric film |
| WO2009151901A1 (en) * | 2008-06-10 | 2009-12-17 | Pliant Corporation | Hermetic packages with laser scored vent systems |
| US20100247822A1 (en) * | 2009-02-03 | 2010-09-30 | Evan Michael Ziolkowski | Variable depth laser scored easy-open pouch for microwave steam venting |
| CN102092514A (en) * | 2010-11-15 | 2011-06-15 | 惠州宝柏包装有限公司 | Air-exhausting flexible packaging bag for frozen vegetables and preparation method thereof |
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2012
- 2012-12-17 CN CN201210544954XA patent/CN102991061A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1822992A (en) * | 2003-07-16 | 2006-08-23 | 美国杜邦泰津胶片合伙人有限公司 | Self - venting polymeric film |
| WO2009151901A1 (en) * | 2008-06-10 | 2009-12-17 | Pliant Corporation | Hermetic packages with laser scored vent systems |
| US20100247822A1 (en) * | 2009-02-03 | 2010-09-30 | Evan Michael Ziolkowski | Variable depth laser scored easy-open pouch for microwave steam venting |
| CN102092514A (en) * | 2010-11-15 | 2011-06-15 | 惠州宝柏包装有限公司 | Air-exhausting flexible packaging bag for frozen vegetables and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108976610A (en) * | 2018-08-20 | 2018-12-11 | 山东斯兰德环保科技有限公司 | A kind of packaging bag composite material and preparation method thereof for Broiled Dishes instant food |
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Application publication date: 20130327 |