CN103802426A - Explosion-proof easy-to-open sealing cover film for microwave-heated plastic food box - Google Patents
Explosion-proof easy-to-open sealing cover film for microwave-heated plastic food box Download PDFInfo
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- CN103802426A CN103802426A CN201410078521.9A CN201410078521A CN103802426A CN 103802426 A CN103802426 A CN 103802426A CN 201410078521 A CN201410078521 A CN 201410078521A CN 103802426 A CN103802426 A CN 103802426A
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Abstract
The invention discloses an explosion-proof easy-to-open sealing cover film for a microwave-heated plastic food box. The cover film is characterized by comprising a printed basal film, an adhesive layer and a heat-sealing layer, which are sequentially compounded, wherein the total thickness of the cover film is not more than 70 microns; the heat-sealing layer is a three-layer co-extruded modified polyethylene film, is 40 to 55 microns thick, and comprises an outer layer, a core layer and an inner layer, which are sequentially compounded; the adhesive layer is compounded with the outer layer of the heat-sealing layer. According to the easy-to-open cover film for the microwave-heated plastic food box, integral sealing performance is maintained before heating, so that the sanitation and the safety of food in circulation and storage processes are ensured; moreover, an outer package is not required, so that the overall packaging cost is reduced; when the food is heated, a non-penetrating notch pre-machined in the cover film is expanded and cracked for deflation and explosion prevention; the heat-sealing layer of the cover film is easy to strip, so that the cover film is easily opened when the food is eaten; a manufacturing process is simple, and the cover film is low in cost.
Description
Technical field
The present invention relates to the explosive-proof sealed epiphragma of easily opening of a kind of plastic food-case for heating using microwave, belong to plastic flexible package technical field.
Background technology
At refrigeration or tv dinner grocery trade, the instant food such as popular box-packed portioned rice bowl/face is more and more subject to the people's of working clan and long-distance rail travel welcome in recent years.The food of this scale processing, conveniently stores on the one hand, transports and sell; On the other hand, by can heating using microwave, people can have the fast food of reeky meat and vegetables collocation, meet Chinese health diet custom.Conventionally, on plastic food-case (being generally polypropylene PP or polythene PE material), seal up epiphragma, food is sealed.The epiphragma of must tearing in the time directly heating with micro-wave oven, or epiphragma must reserved opening, otherwise gas expansion epiphragma pops and causes food splash when heating; And the reserved opening of epiphragma is still ventilated food with the external world, do not meet food sanitation safe requirement, also must increase barrier external packing, so that the guarantee of food hygiene and shelf-life to be provided.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of explosive-proof sealed epiphragma of easily opening of the plastic food-case for heating using microwave, and it is complex food healthy requirement both, the epiphragma food splash causing that pops can avoid heating again time.
In order to address the above problem, technical scheme of the present invention is to provide a kind of explosive-proof sealed epiphragma of easily opening of the plastic food-case for heating using microwave, it is characterized in that, comprise successively compound printing basement membrane, adhesive phase and hot sealing layer, it is characterized in that, the gross thickness of described epiphragma is not more than 70 μ m; Described hot sealing layer is three-layer co-extruded modified polyethylene film, and thickness is 40-55 μ m, and it comprises compound successively skin, core layer and internal layer; Adhesive phase is mutually compound with the skin of hot sealing layer.
Preferably, described printing basement membrane is that thickness is that biaxial tension nylon film or the thickness of 15 μ m is the biaxially oriented polyester film of 12 μ m.
Preferably, the thickness of described adhesive phase is 2.5-3.0 μ m.
Preferably, described skin is ldpe resin layer, and thickness is 10-15 μ m.
Preferably, the ldpe resin of the high-density polyethylene resin that described core layer contains 60% percentage by weight and 40% percentage by weight, thickness is 10-20 μ m.
Preferably, the ldpe resin layer of the polybutene resin that described internal layer contains 15-25% percentage by weight, the medium density polyethylene of 30-50% percentage by weight and 25-55% percentage by weight, thickness is 20-25 μ m.
Preferably, when described epiphragma is overlying on plastic food-case, printing basement membrane is positioned at plastic food-case outside; On epiphragma, be provided with discontinuity apart from two longer edge sealing 6-8mm places of plastic food-case and do not penetrate otch, the length that discontinuity does not penetrate the per pass otch of otch is 5mm, adjacent twice otch be spaced apart 5mm, notch depth is as the criterion to cut off top layer printing basement membrane.
On described epiphragma, be provided with 5mm-5mm discontinuity apart from two longer edge sealing 6-8mm places of plastic food-case and do not penetrate otch when when heating using microwave gas expansion, cutting part cracking, emit portion gas, prevent the epiphragma food splash that pops, meanwhile, in box, keep certain pressure, food Fast Heating, and moisture can not evaporate in a large number in food, the food after heating still has good mouthfeel.Penetrability otch does not make epiphragma keep complete, has guaranteed the safe and sanitary before food consumption.
Microwave heating of food box prepared by the present invention is easily opened epiphragma, keeps complete sealing before heating, has ensured the safe and sanitary of food in circulation and storage, and without external packing, has reduced total packing cost; In the time that food heats, on epiphragma, the non-otch swelling cracking that penetrates of preprocessing, exits explosion-proof; Epiphragma hot sealing layer easily peel off design, make when edible to facilitate epiphragma easily to open.Epiphragma of the present invention, manufacture technology is simple, with low cost.
Accompanying drawing explanation
Fig. 1 is the explosive-proof sealed structural representation of easily opening epiphragma of the plastic food-case for heating using microwave provided by the invention;
Fig. 2 is the structural representation of hot sealing layer in Fig. 1;
Schematic diagram when Fig. 3 is the present invention for the plastic food-case of heating using microwave;
Fig. 4 is that the plastic-food that adopts the present invention to make adds the schematic diagram after thermal expansion.
The specific embodiment
For the present invention is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
Embodiment
As shown in Figure 1-2, for the explosive-proof sealed structural representation of easily opening epiphragma of the plastic food-case for heating using microwave provided by the invention, comprise successively compound printing basement membrane 7, adhesive phase 8 and hot sealing layer 9, the gross thickness of epiphragma 2 is not more than 70 μ m.Described hot sealing layer 9 is three-layer co-extruded modified polyethylene film, and thickness is 40-55 μ m, and it comprises compound successively skin 91, core layer 92 and internal layer 93; Adhesive phase 8 is mutually compound with the skin 91 of hot sealing layer 9.It is that biaxial tension nylon film or the thickness of 15 μ m is the biaxially oriented polyester film of 12 μ m that printing basement membrane 7 adopts thickness.The thickness of adhesive phase 8 is 2.5-3.0 μ m.The skin 91 of hot sealing layer 9 is ldpe resin layer, and thickness is 10-15 μ m; The ldpe resin that core layer 92 contains 60% high-density polyethylene resin and 40% percentage by weight, thickness is 10-20 μ m; The ldpe resin layer of the polybutene resin that described internal layer 93 contains 15-25% percentage by weight, the medium density polyethylene of 30-50% percentage by weight and 25-55% percentage by weight, thickness is 20-25 μ m.In the time that epiphragma 2 is overlying on plastic food-case 1, printing basement membrane 7 is positioned at plastic food-case 1 outside; On epiphragma 2, be provided with 5mm-5mm discontinuity apart from 1 two longer edge sealing 6-8mm places of plastic food-case and do not penetrate otch 3, incision length is 5mm, interval 5mm, and notch depth is as the criterion to cut off top layer printing basement membrane, as shown in Figure 3.
When the heat seal strength of plastic food-case 1 involution that above-mentioned epiphragma 2 and polypropylene PP or polythene PE are made is 10-15N/15mm, (heat-sealing temperature is 150-180 ℃, heat-sealing pressure is 0.35MPa, the heat-sealing time is 1 second), there is good sealing integrity and the easy property opened.
On plastic food-case 1 by epiphragma 2 for heating using microwave, make microwave food, in the time of heating using microwave gas expansion, epiphragma 2 is by jack-up, discontinuity does not penetrate otch 3 swelling crackings, forms multiple steam vents 6, emits demi-inflation gas, as shown in Figure 4, prevent the epiphragma 2 food splash that pops; Meanwhile, in plastic food-case 1, still keep certain pressure, make food Fast Heating, and in food, moisture can not evaporate in a large number, keep good taste.
The explosive-proof sealed epiphragma of easily opening of the plastic food-case for heating using microwave provided by the invention, keeps complete sealing before heating, ensured the safe and sanitary of food in circulation and storage, and without external packing, reduced total packing cost; In the time of heating of food, non-otch 3 swelling crackings that penetrate of the preprocessing discontinuity of epiphragma 2, exit explosion-proof; The hot sealing layer 9 of epiphragma 2 easily peel off design, cutlery box epiphragma 2 when edible is easily opened.It is simple that the present invention has manufacture technology, advantage with low cost.
Claims (7)
1. the explosive-proof sealed epiphragma of easily opening of the plastic food-case for heating using microwave, it is characterized in that, comprise successively compound printing basement membrane (7), adhesive phase (8) and hot sealing layer (9), it is characterized in that, the gross thickness of described epiphragma (2) is not more than 70 μ m; Described hot sealing layer (9) is three-layer co-extruded modified polyethylene film, and thickness is 40-55 μ m, and it comprises compound successively skin (91), core layer (92) and internal layer (93); Adhesive phase (8) is mutually compound with the skin (91) of hot sealing layer (9).
2. the explosive-proof sealed epiphragma of easily opening of the plastic food-case for heating using microwave as claimed in claim 1, it is characterized in that, biaxial tension nylon film or thickness that described printing basement membrane (7) is 15 μ m for thickness are the biaxially oriented polyester film of 12 μ m.
3. the explosive-proof sealed epiphragma of easily opening of the plastic food-case for heating using microwave as claimed in claim 1, is characterized in that, the thickness of described adhesive phase (8) is 2.5-3.0 μ m.
4. the explosive-proof sealed epiphragma of easily opening of the plastic food-case for heating using microwave as claimed in claim 1, is characterized in that, described skin (91) is ldpe resin layer, and thickness is 10-15 μ m.
5. the explosive-proof sealed epiphragma of easily opening of the plastic food-case for heating using microwave as claimed in claim 1, it is characterized in that, the high-density polyethylene resin that described core layer (92) contains 60% percentage by weight and the ldpe resin of 40% percentage by weight, thickness is 10-20 μ m.
6. the explosive-proof sealed epiphragma of easily opening of the plastic food-case for heating using microwave as claimed in claim 1, it is characterized in that, the ldpe resin layer of the polybutene resin that described internal layer (93) contains 15-25% percentage by weight, the medium density polyethylene of 30-50% percentage by weight and 25-55% percentage by weight, thickness is 20-25 μ m.
7. the explosive-proof sealed epiphragma of easily opening of the plastic food-case for heating using microwave as claimed in claim 1, it is characterized in that, when described epiphragma (2) is overlying on plastic food-case (1), printing basement membrane (7) is positioned at plastic food-case (1) outside; Above be provided with discontinuity apart from (1) two longer edge sealing 6-8mm place of plastic food-case does not penetrate otch (3) to epiphragma (2), the length that discontinuity does not penetrate the per pass otch of otch (3) is 5mm, adjacent twice otch be spaced apart 5mm, notch depth is as the criterion to cut off top layer printing basement membrane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410078521.9A CN103802426A (en) | 2014-03-05 | 2014-03-05 | Explosion-proof easy-to-open sealing cover film for microwave-heated plastic food box |
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| CN201410078521.9A CN103802426A (en) | 2014-03-05 | 2014-03-05 | Explosion-proof easy-to-open sealing cover film for microwave-heated plastic food box |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325743A (en) * | 2014-10-15 | 2015-02-04 | 宜昌宏裕塑业有限责任公司 | Easily stripped composite membrane used for automatic package of active dry yeast and preparation method thereof |
| CN104476879A (en) * | 2014-11-21 | 2015-04-01 | 江门市蓬江区华龙包装材料有限公司 | Film easy to uncover and application method of film |
| CN109291580A (en) * | 2018-10-12 | 2019-02-01 | 浙江金石包装有限公司 | A kind of plastic-aluminum combined sealed membrane and preparation method thereof |
| CN109291597A (en) * | 2018-10-18 | 2019-02-01 | 浙江金石包装有限公司 | A kind of package compound film of media-resistant and preparation method thereof |
| CN112938183A (en) * | 2021-03-01 | 2021-06-11 | 北京福迪宝电子商务科技有限公司 | Microwave dining box |
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| CN101942133A (en) * | 2010-08-13 | 2011-01-12 | 黄山永新股份有限公司 | Polyethylene film and laminated film with even heat-seal strength |
| CN202784256U (en) * | 2012-07-13 | 2013-03-13 | 上海紫江彩印包装有限公司 | Stand-up pouch membrane with function of automatic liquid packaging |
| CN103569465A (en) * | 2013-10-28 | 2014-02-12 | 连云港百福来食品有限公司 | Manufacture method of microwave direct heated food bag |
| CN203919907U (en) * | 2014-03-05 | 2014-11-05 | 上海紫江彩印包装有限公司 | The explosive-proof sealed epiphragma of easily opening that is used for the plastic food-case of heating using microwave |
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2014
- 2014-03-05 CN CN201410078521.9A patent/CN103802426A/en active Pending
Patent Citations (5)
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| US20090047490A1 (en) * | 2007-08-16 | 2009-02-19 | Marc Scully | Ovenable multilayered film |
| CN101942133A (en) * | 2010-08-13 | 2011-01-12 | 黄山永新股份有限公司 | Polyethylene film and laminated film with even heat-seal strength |
| CN202784256U (en) * | 2012-07-13 | 2013-03-13 | 上海紫江彩印包装有限公司 | Stand-up pouch membrane with function of automatic liquid packaging |
| CN103569465A (en) * | 2013-10-28 | 2014-02-12 | 连云港百福来食品有限公司 | Manufacture method of microwave direct heated food bag |
| CN203919907U (en) * | 2014-03-05 | 2014-11-05 | 上海紫江彩印包装有限公司 | The explosive-proof sealed epiphragma of easily opening that is used for the plastic food-case of heating using microwave |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325743A (en) * | 2014-10-15 | 2015-02-04 | 宜昌宏裕塑业有限责任公司 | Easily stripped composite membrane used for automatic package of active dry yeast and preparation method thereof |
| CN104325743B (en) * | 2014-10-15 | 2016-06-01 | 湖北宏裕新型包材股份有限公司 | A kind of automatic packaging composite film easy to peel of active dry yeast and its preparation method |
| CN104476879A (en) * | 2014-11-21 | 2015-04-01 | 江门市蓬江区华龙包装材料有限公司 | Film easy to uncover and application method of film |
| CN109291580A (en) * | 2018-10-12 | 2019-02-01 | 浙江金石包装有限公司 | A kind of plastic-aluminum combined sealed membrane and preparation method thereof |
| CN109291597A (en) * | 2018-10-18 | 2019-02-01 | 浙江金石包装有限公司 | A kind of package compound film of media-resistant and preparation method thereof |
| CN112938183A (en) * | 2021-03-01 | 2021-06-11 | 北京福迪宝电子商务科技有限公司 | Microwave dining box |
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Application publication date: 20140521 |