CN201980564U - Composite film with high barrier property and boiling resistance, and bag with boiling resistance - Google Patents
Composite film with high barrier property and boiling resistance, and bag with boiling resistance Download PDFInfo
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- CN201980564U CN201980564U CN2010206774658U CN201020677465U CN201980564U CN 201980564 U CN201980564 U CN 201980564U CN 2010206774658 U CN2010206774658 U CN 2010206774658U CN 201020677465 U CN201020677465 U CN 201020677465U CN 201980564 U CN201980564 U CN 201980564U
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- cpp
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Abstract
The utility model provides a composite film with boiling resistance, wherein the composite film comprises a first CPP (Cast Polypropylene) layer, a PVDC (Poly Vinylidene Chloride) layer and a second CPP layer which are connected in order through an adhesive. In addition, the utility model also provides a bag with boiling resistance in which the composite film with boiling resistance is used as a base film. The utility model adopts a PP (Polypropylene) structure for both the outermost layer and the innermost layer in three-layer structure of the composite film, i.e., the three-layer structure of the composite film is symmetrical, therefore each layer may keep a synchronous shrinkage when the composite film is in a state of heating, stretching and contracting, thus crimping resulted from the stretching of the composite film can be avoided. Furthermore, the CPP has high water-resistance, and the PVDC has high barrier property for water and oxygen, so that the composite film with boiling resistance has an excellent barrier property, experiments provide evidence that water-vapor transmittance of the composite film with boiling resistance provided by the utility model is less than 5 g/(m<2>*24h), and oxygen transmittance is less than 20 cm<3>/(m<2>*24h*0.1MPa).
Description
Technical field
The utility model relates to the packing field, particularly a kind of high-barrier boiling resistance complex film and anti-retort pouch.
Background technology
Anti-retort pouch claims foods packed in carton containers again, and being meant can packaged food and can stand the laminated film of 121 ℃ of steam heating sterilization processing.At present, be mainly used in packing tinned food, can also be used for packaged beverage in countries such as Japan and West Europe at China's retort pouch.
With respect to traditional metal Can container, anti-retort pouch has following advantage: at first, the raw material ratio metal sheet price of anti-retort pouch is low, and its production technology and Fabricating machinery are also comparatively simple, and therefore the manufacturing cost of anti-retort pouch is lower; Secondly, anti-retort pouch is thinner, can reach sterilising temp by fast speed, and this has not only reduced the sterilization power consumption, can also the original taste of preservation inner packing food as much as possible; At last, the retort pouch lighter weight is convenient to the customer and is carried.Therefore, in recent years, the market of anti-retort pouch constantly enlarged, even was expected to substitute traditional metal packing material in some fields.
The film of anti-boiling that anti-retort pouch uses is different from general barrier film, and it needs that not only the oxygen G﹠W is had extremely low transmitance, also needs to satisfy following 3 requirements:
1., have digestion resistant, vicat softening point temperature need be higher than sterilising temp, is that it satisfies sterilization comformability;
2., have heat-shrinkable, shrink under the high temperature, guarantee the applying degree of packaging bag and packed article, reduce the interior gas remnants of bag;
3., have planeness preferably, not only be convenient to heat-sealing, for the commodity that needs are stood and put, smooth bottom surface is the basis that guarantees that packaging bag is steadily stood.
Existing retort packaging film mainly comprises aluminum-plastic composite membrane and the transparent complex film of anti-the boiling, because aluminum-plastic composite membrane does not have the transparency and can not carry out microwave, therefore, the transparent film of anti-the boiling becomes industry personnel's main research object gradually.
The existing transparent complex film of anti-the boiling is generally two-layer compound structure, concrete as: the complex film that comprises aramid layer and cast polypropylene layer successively, or comprise the complex film of polyester layer and cast polypropylene layer successively, though the complex film of anti-boiling of said structure diaphaneity is very high, but its barrier still remains to be improved, and because this kind complex film need heat drawing and forming, add film after the hot-stretch because the percent thermal shrinkage difference of each layer, crimping easily takes place in the complex film after the stretching, causes the planeness of anti-retort pouch lower.
The utility model content
The technical matters that the utility model solves is to provide a kind of high barrier, and the back that stretches is difficult for taking place the complex film of anti-boiling of crimping.
In view of this, the utility model provides a kind of complex film of anti-the boiling, comprises successively by the one CPP layer of adhesion agent bonded assembly successively, PVDC layer and the 2nd CPP layer.
Preferably, a described CPP layer comprises successively: hot sealing layer, interlayer and with the contacted first corona layer of described PVDC layer.
Preferably, described the 2nd CPP layer comprises: with the contacted second corona layer of described PVDC layer, interlayer and surface layer.
The utility model also provides a kind of anti-retort pouch, comprising: heat-sealing is connected with adventitia for counterdie and adventitia, the described complex film of anti-the boiling;
Described counterdie comprises: by the one CPP layer of adhesion agent bonded assembly successively, PVDC layer and the 2nd CPP layer.
Preferably, a described CPP layer comprises successively: hot sealing layer, interlayer and with the contacted first corona layer of described PVDC layer.
Preferably, described the 2nd CPP layer comprises successively: with the contacted second corona layer of described PVDC layer, interlayer and surface layer.
Preferably, described adventitia comprises: by the 3rd CPP layer, PVDC layer and BOPP layer that adhesion agent links to each other successively, described the 3rd CPP layer contacts with described counterdie.
Preferably, described the 3rd CPP layer comprises successively: with the contacted second corona layer of described PVDC layer, interlayer and hot sealing layer.
The utility model provides a kind of complex film of anti-the boiling, comprises a CPP layer, PVDC layer and the 2nd CPP layer successively.With respect to the existing complex film of anti-the boiling, the complex film that the utility model provides adopts three layers composite structure, and the three-decker of complex film adopts symmetrical expression, make complex film all keep synchronous shrinkage percentage thus, avoided complex film stretching back that crimping takes place at heating, stretching and each layer of contraction state.In addition, because the CPP layer has higher waterproof property, the PVDC layer all has higher barrier to water and oxygen, makes the above-mentioned complex film of anti-the boiling have excellent barrier property, the steam transmitance that experiment showed, the complex film of anti-boiling that the utility model provides is less than 5g/ (m
224h), OTR oxygen transmission rate is less than 20cm
3/ (m
224h0.1MPa).
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is provided for the utility model by the structural representation of 1 complex film of anti-boiling that provides;
The structural representation of a CPP layer in the complex film that provides for the utility model embodiment 1 is provided Fig. 2;
The structural representation of the 2nd CPP layer in the complex film that Fig. 3 provides for the utility model embodiment 1;
The structural representation of the anti-retort pouch that Fig. 4 provides for the utility model embodiment 2;
The anti-retort pouch outer membrane structure scheme drawing that Fig. 5 provides for the utility model embodiment 2.
The specific embodiment
In order further to understand the utility model, below in conjunction with embodiment the utility model preferred embodiment is described, but should be appreciated that these describe just to further specifying feature and advantage of the present utility model, rather than to the restriction of the utility model claim.
The utility model embodiment discloses a kind of complex film of anti-the boiling, referring to the structure of composite membrane of anti-boiling scheme drawing that Figure 1 shows that the utility model embodiment 1 provides, it comprises successively: a CPP layer 1, PVDC layer 2 and the 2nd CPP layer 3, above-mentioned three layers by adhesion agent compound.
Because the complex film of anti-the boiling needs to carry out stretch processing in the process that packing material is packed, stretch processing rear film inside has stress-retained, part can take place and shrink in complex film under the internal stress effect, crimping easily takes place because of shrinkage percentage is different laminated film each layer in contraction process.Crimping takes place in order to prevent complex film in the utility model in contraction process, outermost layer in the laminated film three-decker and innermost layer all adopt the PP structure, the three-decker that is complex film adopts symmetrical expression, make complex film all keep synchronous shrinkage percentage thus, avoided complex film stretching back that crimping takes place at heating, stretching and each layer of contraction state.
Select for use the PP structural reason to be at laminated film outermost layer and innermost layer: PP not only has good moisture resistance and waterproof property, and boiling resistance is good, and its vicat softening point temperature is higher than 121 ℃, satisfies the sterilization requirement.
The PP film can be divided into OPP film and CPP film by its production technology, and wherein the OPP film is the oriented polypropylene film, and the CPP film is the polypropylene film of producing by the curtain coating extrusion process, claims un-stretched polypropylene film again.In the complex film of anti-boiling of the three-decker that the utility model adopts, all adopting the CPP film at its outermost layer and innermost layer is to consider that CPP is easier to drawing and forming, and it is compound through being easy to other material after corona treatment.
Though the CPP film has above-mentioned advantage, its barrier to gas is relatively poor, and percent thermal shrinkage is also lower.For this reason, the utility model is selected PVDC for use at the interlayer of three-decker.PVDC (poly vinylidene chloride) is the homopolymer of vinylidene chloride, and its transmitance to oxygen is extremely low, less than 50cm3/m2.24h.atm, can effectively prevent food generation oxidation deterioration thus; The steam transmitance of PVDC is also lower, less than 5g/m
2.24h, can effectively prevent the inner package moisture loss; The resistance to effect of heat of PVDC is higher, the highest can be anti-130 ℃, satisfy the requirement of sterilization processing; The heat-shrinkable of PVDC is better, and percent thermal shrinkage at high temperature is higher, is close on the packing material in order to guarantee film, reduces gas residue in the packaging bag, extends the shelf life.
Referring to the structural representation that Figure 2 shows that a CPP layer in the complex film that present embodiment provides, a CPP layer comprises successively in this enforcement: hot sealing layer 101, interlayer 102 and the first corona layer 103, the first corona layer 103 contacts with PVDC layer 2 in the said structure.Alleged corona layer is meant the one deck at the corona surface place of carrying out corona treatment in the complex film in the utility model, the CPP film is carried out corona treatment after, the degree of polarization of corona surface improves, and is easy to carry out compound with the PVDC layer.Above-mentioned hot sealing layer, interlayer and the first corona layer all are to be made by binary copolymerization PP.
Binary copolymerization PP has good digestion resistant and heat sealability, and it promptly has very high heat seal strength at 132 ℃, and elasticity is good, gives the mechanical property that complex film is easy to drawing and forming, and binary copolymerization PP preferably adopts the copolymer of propylene and ethene.
Referring to the structural representation that Figure 3 shows that the 2nd CPP layer in the complex film that the utility model provides, one deck that the 2nd CPP layer is and heating plate is directly fitted, with respect to a CPP layer, it need have more excellent heat resisting in order to satisfy the processing needs.The utility model preferably the 2nd CPP layer of usefulness comprises successively: with the PVDC layer 2 contacted second corona layer 301, interlayer 302 and surface layer 303.Wherein, the second corona layer 301 and interlayer 3002 are made by the poly-PP of binary copolymerization, and surface layer 303 is made by homopolymerization PP.In the heating drawing process, surface layer is one deck direct and that heating plate is fitted, and its resistance to heat is determining the comformability of whole complex film to Fabricating machinery, and the resistance to effect of heat of homopolymerization PP is best in the PP resin, and therefore, surface layer is selected homopolymerization PP for use.The second corona layer is and the contacted one deck of PVDC layer that corona layer and interlayer select for use binary copolymerization PP to be used to improve the tensile property of complex film.
The above-mentioned complex film of anti-boiling that the utility model provides preferably is prepared as follows:
Behind the PVDC layer coated on both sides type of anti-boiling adhesion agent, carry out solvent-free compound respectively at a CPP layer and the 2nd CPP layer.Solvent-free compound be the solventless adhesive that adopts 100% solid, the method that on solvent-free composite machine two kinds of base materials is combined with each other claims that again response type is compound.Adopt the solvent-free compound volatile solvent discharging of not only not having in process of production, reduce environmental pollution, and also make and meet the hygienic requirements of modern food and drug packaging by no solvent residue in the complex film after compound.The double component solvent-free glue of anti-boiling the 7735 and 6088 that the adhesion agent that the utility model uses preferably selects for use Henkel KGaA company to produce, it is to the CPP film and the PVDC film all has higher adhesive ability and boiling resistance can be good.
The complex film of anti-boiling that present embodiment is provided carries out the barrier property test, and test result is listed in table 1.
The complex film of anti-boiling barrier property test result that table 1 embodiment 1 provides
Referring to the structural representation that Figure 4 shows that the anti-retort pouch that the utility model embodiment 2 provides, it comprises heat-sealing bonded assembly adventitia 4 and counterdie 5, the complex film of anti-boiling that counterdie 5 adopts the foregoing description 1 to provide.
Referring to the anti-retort pouch outer membrane structure scheme drawing that Fig. 5 provides for present embodiment, it comprises successively: link to each other successively by adhesion agent with described counterdie 5 contacted the 3rd CPP layers 401, PVDC layer 402 and BOPP layer 403.
Though adventitia does not need to add hot-stretch, but it needs in sterilization process through thermophilic digestion, complex film expanded by heating during thermophilic digestion, for the complex film crimping that prevents that each layer of adventitia from causing because of the expansion rate difference, the adventitia of anti-retort pouch that the utility model provides also adopts symmetrical structure, and the outermost layer of adventitia and innermost layer all adopt the PP structure.Because the surface layer of adventitia is the one side that needs the carrying printing, considers that from the printing aspect printing of BOPP should adapt to and be better than CPP, therefore selects for use the surface layer of adventitia to select BOPP for use.
The 3rd CPP layer is preferably identical with a CPP layer structure in the counterdie, is convenient to carry out compound with PVDC.
Use the packaging process of above-mentioned anti-retort pouch to be: counterdie is placed the moulding heater plate surface, counterdie is heated, the heating back uses forming mould that counterdie is carried out the vacuum drawing and forming, counterdie forms tolerant 501 and the heat-sealing portion 502 that holds connection with wrapping of piece, in tolerant of counterdie, add packed article, then itself and adventitia are sealed in heat-sealing portion 502.
Because the counterdie and the adventitia of above-mentioned retort packaging bag all have higher barrier, and counterdie is difficult for crimping after adding hot-stretch, therefore can be widely used in the packing of meat products, bean product and beverage.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from spirit or scope of the present utility model in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (8)
1. the complex film of anti-the boiling is characterized in that, comprising: by the one CPP layer of adhesion agent bonded assembly successively, PVDC layer and the 2nd CPP layer.
2. the complex film of anti-boiling the according to claim 1 is characterized in that, a described CPP layer comprises successively: hot sealing layer, interlayer and with the contacted first corona layer of described PVDC layer.
3. the complex film of anti-boiling the according to claim 1 is characterized in that, described the 2nd CPP layer comprises: with the contacted second corona layer of described PVDC layer, interlayer and surface layer.
4. an anti-retort pouch is characterized in that, comprising: heat-sealing is connected with adventitia for counterdie and adventitia, the described complex film of anti-the boiling;
Described counterdie comprises: by the one CPP layer of adhesion agent bonded assembly successively, PVDC layer and the 2nd CPP layer.
5. anti-retort pouch according to claim 4 is characterized in that, a described CPP layer comprises successively: hot sealing layer, interlayer and with the contacted first corona layer of described PVDC layer.
6. anti-retort pouch according to claim 4 is characterized in that, described the 2nd CPP layer comprises successively: with the contacted second corona layer of described PVDC layer, interlayer and surface layer.
7. anti-retort pouch according to claim 4 is characterized in that, described adventitia comprises: by the 3rd CPP layer, PVDC layer and BOPP layer that adhesion agent links to each other successively, described the 3rd CPP layer contacts with described counterdie.
8. the band of anti-boiling the according to claim 7 is characterized in that, described the 3rd CPP layer comprises successively: with the contacted second corona layer of described PVDC layer, interlayer and hot sealing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206774658U CN201980564U (en) | 2010-12-23 | 2010-12-23 | Composite film with high barrier property and boiling resistance, and bag with boiling resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206774658U CN201980564U (en) | 2010-12-23 | 2010-12-23 | Composite film with high barrier property and boiling resistance, and bag with boiling resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201980564U true CN201980564U (en) | 2011-09-21 |
Family
ID=44608028
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206774658U Expired - Lifetime CN201980564U (en) | 2010-12-23 | 2010-12-23 | Composite film with high barrier property and boiling resistance, and bag with boiling resistance |
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|---|---|
| CN (1) | CN201980564U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102048061A (en) * | 2010-11-01 | 2011-05-11 | 雀巢公司 | Cooking set and application thereof in electric cooker |
| CN102173143A (en) * | 2010-12-23 | 2011-09-07 | 黄山永新股份有限公司 | Stewing-resistant composite film and stewing-resistant bag |
| CN103192570A (en) * | 2013-04-19 | 2013-07-10 | 黄山永新股份有限公司 | High-resistance steam resistant packaging film convenient for direct microwave heating and preparation method thereof |
| CN104742463A (en) * | 2015-04-17 | 2015-07-01 | 湖北德威包装科技有限公司 | High-barrier high-temperature-resistant sterilization digestion membrane and preparation method thereof |
| CN112549715A (en) * | 2020-12-01 | 2021-03-26 | 黄山永新股份有限公司 | Recyclable liquid-washing small packaging film and production process thereof |
| CN114126974A (en) * | 2019-07-29 | 2022-03-01 | 凸版印刷株式会社 | Laminate and packaging bag |
-
2010
- 2010-12-23 CN CN2010206774658U patent/CN201980564U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102048061A (en) * | 2010-11-01 | 2011-05-11 | 雀巢公司 | Cooking set and application thereof in electric cooker |
| CN102173143A (en) * | 2010-12-23 | 2011-09-07 | 黄山永新股份有限公司 | Stewing-resistant composite film and stewing-resistant bag |
| CN103192570A (en) * | 2013-04-19 | 2013-07-10 | 黄山永新股份有限公司 | High-resistance steam resistant packaging film convenient for direct microwave heating and preparation method thereof |
| CN103192570B (en) * | 2013-04-19 | 2015-04-15 | 黄山永新股份有限公司 | High-resistance steam resistant packaging film convenient for direct microwave heating and preparation method thereof |
| CN104742463A (en) * | 2015-04-17 | 2015-07-01 | 湖北德威包装科技有限公司 | High-barrier high-temperature-resistant sterilization digestion membrane and preparation method thereof |
| CN114126974A (en) * | 2019-07-29 | 2022-03-01 | 凸版印刷株式会社 | Laminate and packaging bag |
| CN112549715A (en) * | 2020-12-01 | 2021-03-26 | 黄山永新股份有限公司 | Recyclable liquid-washing small packaging film and production process thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110921 |