CN102935753B - Sealing cover film - Google Patents
Sealing cover film Download PDFInfo
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- CN102935753B CN102935753B CN201210411811.1A CN201210411811A CN102935753B CN 102935753 B CN102935753 B CN 102935753B CN 201210411811 A CN201210411811 A CN 201210411811A CN 102935753 B CN102935753 B CN 102935753B
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Abstract
The invention discloses a sealing cover film. The cover film comprises the components of, from outside to inside: a PET layer, an aluminum layer, an ethylene acrylic copolymer layer, a bimodal polyethylene layer, and a composite polyethylene layer. Compared with prior arts, the cover film provided by the invention has the characteristics that: (1) the film has good flavor maintaining performance, dampness inhibiting performance, and gas barrier performance; (2) the cover film is adapted to high-speed packaging; (3) the cover film is convenient to process, and can be subjected to fast product-change, such that the cover film can be adapted to productions with large and small orders; (4) the film has low cost and higher cost performance; and (5) the cover film has the unique internal layer design, and has a repeated opening and sealing function, such that rest contents can be well protected. The cover film provided by the invention can be widely applied in packaging of biscuits, jam, potato chips (bar), instant food, puffed food, snack food, and the like. The cover film is suitable for fast pace life of modern times, and assist in reducing the application of secondary packaging. In actural packaging processed, with the cover film, package yield can be effectively ensured, film material waste is low, production efficiency can be effectively improved, and cost can be reduced.
Description
Technical field
The invention belongs to packaging film, belong to sealing epiphragma especially.
Background technology
In recent years, along with expanding economy, the disposable income in people's hand also increases year by year, and material life is enriched constantly, have also been obtained fast development with people's closely bound up food service industry of living." 12 " period, the main target proposing China development of food industry is exactly the convenient purification problem that will solve food, gives priority to all kinds of instant food, if major-minor instant food, Chinese and Western are in conjunction with supporting fast food, student's meal, quick-frozen food, quick-served semi-finished etc.Food industry often strides forward a step, all proposes new requirement to packaging for foodstuff.
Now, the quickening of people's rhythm of life, determining convenient purification will be the irreversible trend of food development.Food production business tries hard to hygienic and convenient, packaging novel free from vulgarity, elegant in appearance to attract consumer.To be there is following development trend in " Chinese Flexible Package Market report " forecast China packaging market: 1, be convenient to open, topple over and take out, easy to use; 2, compact, seriation; 3, micro-wave oven purpose-made pallet packaging; Wherein particularly to go out the leisure that eats and travel food, not need other container, do not need extra opener instant packed be the emphasis of development.
As far back as eighties of last century beginning of the nineties, along with the fast development of western fast food and instant food, be that packaged form backing sealing Soft Roll capping material is widely used in developed countries such as America and Europes with plastic containers.This type of packaging does not need extra container, conveniently opens, is easy to carry about with one, safety and sanitation, and the crowd that very proper operation is busy uses, and just receives the extensive welcome of people after release.
In recent years, China's food packaging market also occurs the packaged form of the plastic containers seal cap released for rapid life rhythm successively, as packagings such as jelly, jam, biscuit, potato chips, because the type packaging is small and exquisite, shelf are effective, safety and sanitation performance is high, easy-to-use, has obtained increasing concern.But this type of packaging existence obvious problem at present, after opening exactly, the food in packaging must be disposablely eaten up, otherwise, due to can not involution again after packaging unlatching, corresponding protective effect cannot be played to the food do not eaten.At present, to the solution that can repeat sealing problem on market, often by what install slide fastener to realize on bag.But there is two problems, 1) procurement price of slide fastener own is higher, increases packing cost; 2) add slide fastener in packaging process, reduce production efficiency.3) zipper strip packaging is not suitable for the packaging of the friable food products such as potato chips, biscuit, expanded class.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of sealing epiphragma repeating press seal.
The technical scheme of technical solution problem of the present invention is a kind of sealing epiphragma, is pet layer, aluminium lamination, ethylene acrylic acid co polymer layer, bimodal polyethylene layer, composite polyethylene layer from outside to inside.
Preferred sealing epiphragma is 12 μm of pet layers, 7 μm of aluminium laminations, 12 μm of ethylene acrylic acid co polymer layers, 6 μm of bimodal polyethylene layers, 50 μm of composite polyethylene layers.
Described composite polyethylene layer is skin, glue-line, ethylene acrylic acid co polymer layer from outside to inside.
Preferred composite polyethylene layer is 20 μm of skins, 20 μm of glue-lines, 10 μm of ethene-acetate ethylene copolymer layers.
Described skin is by low density polyethylene (LDPE) and LLDPE blending extrusion, and the weight ratio of low density polyethylene (LDPE) and LLDPE is 1:1-3;
Described glue-line is boss's glue-line.
In the present invention:
Adopt PET(biaxial tension PETG) film as skin, ensure that the dimensional stability of packaging material in High-Speed Automatic packaging process, print decoration result, improve the combination property of product and product specification.Its characteristic also can ensure preferably when high temperature scalds bar heat seal, the adhesive force of ink and heat-resisting rear discoloration.
Aluminium foil is because it has high barrier property and shading performance, can play good resistance dampness oxygen and shaded effect, have good fragrance protectiveness, can well protect content.
Ethylene acrylic acid co polymer (EAA) is a kind of polymer with thermoplasticity and high thermal bonding, and due to the existence of carboxyl group and the effect of hydrogen bond, the crystallinity of polymer is suppressed, and main chain formability is destroyed, good because this ensure that the toughness of EAA.The fracture that barrier layer AL paper tinsel can well be protected to occur and pin-hole phenomena.
Its feature is: accurate MOLECULE DESIGN and high-precision co-monomer content accurately, can provide excellent adhesion on aluminium foil, thus greatly optimizes the complete of material-structure and barrier.Chemical functional key can be formed with AL paper tinsel, interlayer combined strength bination can not be failed, and ensure that AL paper tinsel can not rupture.Can extrude at a lower temperature, thus avoid the high cost increase brought of processing temperature.
Bimodal polyethylene has good mobility and better physical and mechanical properties.Due to EAA membrane molecular characteristic, its molding effect is poor.Therefore, then squeeze into one deck PE(bimodal polyethylene), synergy, ensures the molding effect of film, improves processing characteristics.That can reduce that EAA coextrusion compound tense easily occurs tightens problem, ensures the thickness uniformity extruded, thus ensures the apparatus adaptability of finished product on packing machine.Simultaneously it also has good hot sticky performance and heat sealability, with internal layer PE film co-extrusion after bonding strength strengthen;
Compound PE film formulation makes it have good antifouling property and hot sticky performance, even if when closure part is stained with content residue, still can keep excellent sealing effect; Good heat sealability is had after bonding with PS or PP cup; There is stable coefficient of friction control, ensure the normal operation of high-speed packaging.By epiphragma from after PP or PS cup is opened, the intermediate layer boss's glue in PE layer can play the good effect of involution again.
Skin selects LDPE and LLDPE, on the one hand can reduce production cost, keeps the deflection when fervent of PE film, on the other hand, itself and PE(bimodal polyethylene) between have good adhesion.
Using boss's glue as intermediate layer.Boss's glue has good mobility and internal adhesion, by repeatedly opening test data, selects MX615 type boss glue.This glue first time reaches the bonding force of more than 6.0N/15mm when opening, at press seal repeatedly, open after ten times, the bonding force of about the 2N/15MM that still has an appointment, has fabulous repeated press seal function.
Because heat-sealing time bonding PP cup or PS cup material, so compound PE must have good antifouling property and hot sticky performance, EVA has has bonding force good, and good, the percentage elongation of the transparency and the feature such as obdurability is excellent, obtained by ethene, vinyl acetate two kinds of monomer copolymerizations.At the PE film that total thickness is 50 μm, using EVA as with PP(PS) the hot sealing layer thickness that directly contacts of cup be decided to be 10 μm time, good sealing effect can be played.
The present invention compared with prior art, has following characteristics
1) fragrance protectiveness, hinder moist, barrier properties for gases good;
2) high-speed packaging is adapted to;
3) easy to process, change the line of production rapidly, the production of size order can be adapted to;
4) low price, the cost performance that tool is higher;
5) unique endothecium structure design, and there is the function repeating to open also involution, remaining content can be protected preferably.This product can be widely used in the packaging of biscuit, jam, potato chips (bar), instant food, dilated food, leisure food etc., adapts to modern anxiety rhythm of life fast, can reduce the use of secondary package.In virtual package process, can effectively ensure packed products rate, coating materials waste is few, effectively can enhance productivity, reduce costs.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the result schematic diagram of composite polyethylene layer of the present invention.
Fig. 3 is process chart of the present invention.
In Fig. 1,2,1 be pet layer, 2 be aluminium lamination, 3 be ethylene acrylic acid co polymer layer, 4 be bimodal polyethylene layer, 5 be composite polyethylene layer, 51 for outer, 52 be glue-line, 53 be ethylene acrylic acid co polymer layer.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1:
As shown in Figure 3:
Preparation technology of the present invention is
A, PET printing process: print on PET, makes PET print film;
B, the first compound working procedure: PET print film and aluminium foil are carried out compound, makes PET/AL
Composite membrane;
C, the second compound working procedure: PET/AL composite membrane and ethylene acrylic acid co polymer, bimodal polyethylene, composite polyethylene are carried out coextru-lamination,
Described composite polyethylene is skin, boss's glue, ethylene acrylic acid co polymer coextru-lamination;
Skin is wherein made up of low density polyethylene (LDPE) and LLDPE, and the weight ratio of low density polyethylene (LDPE) and LLDPE is 1:3;
As shown in Figure 1, 2, the composite membrane that the present invention is made is 12 μm of pet layers, 1,7 μm of aluminium laminations, 2,12 μm of ethylene acrylic acid co polymer layers, 3,6 μm of bimodal polyethylene layer, 4,50 μm of composite polyethylene layer 5 from outside to inside;
Described composite polyethylene layer is 20 μm of skins, 51,20 μm of glue-lines, 52,10 μm of ethene-acetate ethylene copolymer layers 53.
Embodiment 2:
Be made up of low density polyethylene (LDPE) and LLDPE except outer, the weight ratio of low density polyethylene (LDPE) and LLDPE is 1:1; Outward, all the other are identical with embodiment 1.
The technique effect of embodiment 1,2 is as follows:
Described crowded cladding is made up of ethylene acrylic acid co polymer layer, bimodal polyethylene layer.
Claims (3)
1. seal an epiphragma, it is characterized in that: be pet layer, aluminium lamination, ethylene acrylic acid co polymer layer, bimodal polyethylene layer, composite polyethylene layer from outside to inside;
Described composite polyethylene layer is skin, glue-line, ethylene-vinyl acetate copolymer layer from outside to inside;
Described skin is by low density polyethylene (LDPE) and LLDPE blending extrusion, and the weight ratio of low density polyethylene (LDPE) and LLDPE is 1:1-3;
Described glue-line is boss's glue-line.
2. one sealing epiphragma according to claim 1, is characterized in that: described sealing epiphragma is 12 μm of pet layers, 7 μm of aluminium laminations, 12 μm of ethylene acrylic acid co polymer layers, 6 μm of bimodal polyethylene layers, 50 μm of composite polyethylene layers.
3. one sealing epiphragma according to claim 2, is characterized in that: described composite polyethylene layer is 20 μm of skins, 20 μm of glue-lines, 10 μm of ethene-acetate ethylene copolymer layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210411811.1A CN102935753B (en) | 2012-10-24 | 2012-10-24 | Sealing cover film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210411811.1A CN102935753B (en) | 2012-10-24 | 2012-10-24 | Sealing cover film |
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| Publication Number | Publication Date |
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| CN102935753A CN102935753A (en) | 2013-02-20 |
| CN102935753B true CN102935753B (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210411811.1A Active CN102935753B (en) | 2012-10-24 | 2012-10-24 | Sealing cover film |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057662A (en) * | 2014-06-25 | 2014-09-24 | 金石包装（嘉兴）有限公司 | Laminating aluminum plastic composite membrane with patterns on inner surface and production method thereof |
| CN104875950B (en) * | 2015-06-01 | 2017-11-07 | 黄山永新股份有限公司 | A kind of epiphragma and preparation method thereof |
| CN109514957A (en) * | 2017-09-16 | 2019-03-26 | 浙江保禄包装科技股份有限公司 | The repeatable polyolefin film sealed, composite covering film and preparation method thereof |
| CN108177401B (en) * | 2017-12-13 | 2020-02-04 | 上海紫江彩印包装有限公司 | Polyolefin film, preparation method thereof and photosensitive material sealing film comprising polyolefin film |
| CN110549714B (en) * | 2019-08-28 | 2021-11-09 | 浙江金石包装有限公司 | Straw cup seals complex film |
Citations (5)
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|---|---|---|---|---|
| EP1182142A1 (en) * | 1999-09-10 | 2002-02-27 | Ishida Co., Ltd. | Food-packaging bag, method of food packaging, and use of laminated film as food-packaging bag |
| CN101580153A (en) * | 2008-05-16 | 2009-11-18 | 艾尔坎技术及管理有限公司 | Packaging covering film, container, packaging and packaging product unit |
| CN101624112A (en) * | 2009-08-14 | 2010-01-13 | 黄山永新股份有限公司 | Composite membrane for sauce and preparation method thereof |
| CN102514331A (en) * | 2011-12-24 | 2012-06-27 | 江阴宝柏包装有限公司 | Microwave heatable bowl cover film with good planeness and preparation method thereof |
| CN202862736U (en) * | 2012-10-24 | 2013-04-10 | 黄山永新股份有限公司 | Seal covering membrane |
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2012
- 2012-10-24 CN CN201210411811.1A patent/CN102935753B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1182142A1 (en) * | 1999-09-10 | 2002-02-27 | Ishida Co., Ltd. | Food-packaging bag, method of food packaging, and use of laminated film as food-packaging bag |
| CN101580153A (en) * | 2008-05-16 | 2009-11-18 | 艾尔坎技术及管理有限公司 | Packaging covering film, container, packaging and packaging product unit |
| CN101624112A (en) * | 2009-08-14 | 2010-01-13 | 黄山永新股份有限公司 | Composite membrane for sauce and preparation method thereof |
| CN102514331A (en) * | 2011-12-24 | 2012-06-27 | 江阴宝柏包装有限公司 | Microwave heatable bowl cover film with good planeness and preparation method thereof |
| CN202862736U (en) * | 2012-10-24 | 2013-04-10 | 黄山永新股份有限公司 | Seal covering membrane |
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| CN102935753A (en) | 2013-02-20 |
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