CN205044229U - Composite films with embedded window structure - Google Patents
Composite films with embedded window structure Download PDFInfo
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- CN205044229U CN205044229U CN201520681327.XU CN201520681327U CN205044229U CN 205044229 U CN205044229 U CN 205044229U CN 201520681327 U CN201520681327 U CN 201520681327U CN 205044229 U CN205044229 U CN 205044229U
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- China
- Prior art keywords
- film
- polyvinyl alcohol
- layer
- hole
- laminated film
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- Expired - Fee Related
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- 239000002131 composite material Substances 0.000 title abstract description 30
- 239000010408 film Substances 0.000 claims abstract description 140
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 62
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 62
- 239000000463 material Substances 0.000 claims abstract description 40
- 239000007789 gas Substances 0.000 claims abstract description 17
- 150000001875 compounds Chemical class 0.000 claims abstract description 16
- -1 polyene hydro carbons Chemical class 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 12
- 239000010409 thin film Substances 0.000 claims abstract description 10
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 7
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims abstract description 3
- 229920005989 resin Polymers 0.000 claims abstract description 3
- 229920000098 polyolefin Polymers 0.000 claims description 38
- 238000004080 punching Methods 0.000 claims description 21
- 230000035699 permeability Effects 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 229920001903 high density polyethylene Polymers 0.000 claims description 5
- 239000004700 high-density polyethylene Substances 0.000 claims description 5
- 229920001684 low density polyethylene Polymers 0.000 claims description 5
- 239000004702 low-density polyethylene Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 4
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 4
- 238000006136 alcoholysis reaction Methods 0.000 claims description 2
- 244000017160 saligot Species 0.000 claims description 2
- 235000009165 saligot Nutrition 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 23
- 235000013399 edible fruits Nutrition 0.000 abstract description 4
- 235000013311 vegetables Nutrition 0.000 abstract description 4
- 230000004888 barrier function Effects 0.000 abstract description 3
- 229930195733 hydrocarbon Natural products 0.000 abstract 3
- 238000000926 separation method Methods 0.000 abstract 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 24
- 238000000034 method Methods 0.000 description 13
- 235000011187 glycerol Nutrition 0.000 description 10
- 238000003851 corona treatment Methods 0.000 description 6
- 235000012055 fruits and vegetables Nutrition 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000003490 calendering Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 229920006262 high density polyethylene film Polymers 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000007170 pathology Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
The utility model relates to a composite films with embedded window structure. Composite films forms by three -layer film is compound, and wherein, the intermediate level is the thin film materials that punches of polyene hydro carbons, upper and lower two layers are close water -base resin polyvinyl alcohol film, and two layer upper and lower thin film formation are to the punch confining bed of film hole of intermediate level, the thin film materials's that punches of middle polyene hydro carbons penetrating hole makes the embedding and seal the punch hole of film of intermediate level polyene hydro carbons in compound of the two -layer polyvinyl alcohol material in upper and lower layer when upper and lower two -layer film is compound, formation can be released steam and had other gaseous windows of ability separation again. Composite films not only has excellent barrier properties to gases such as oxygen, carbon dioxide, and the while is gone up the polyvinyl alcohol film window that forms through composite films and can be released and see through steam, plants to have the ventilative functional film of selectivity, can be applied to the fresh -keeping of fresh goods such as fruit, vegetables and store.
Description
Technical field
The utility model relates to a kind of composite film material, particularly a kind of laminated film with embedded window structure.
Background technology
Polyolefin (PO) class plastics (PE, PP etc.) film because nontoxic, transparent, intercept the feature such as steam, be widely used in the packaging of fruit, vegetables and other food.In use also this kind of plastics material film has good moisture content and water vapor rejection characteristic just, so after packing fruit and vegetable, respiration due to fruits and vegetables can make to form serious steam and ponding in bag film, easily makes the fresh goods such as packaged fruit, vegetables occur rotting; In order to not produce ponding, on this type of film, usually carrying out punching process, carry out the too much steam of release portion by packing film existing penetrating hole (window), and make not produce ponding in wrapping film bag.But the hole of this existence permeability on film can make again packaged fruits and vegetables easily contact with extraneous air, causes the invasion of oxygen, other microbial bacterials etc., produce other pathology or rotten, have a strong impact on the fresh-keeping of fruits and vegetables and wholesomeness.
The purpose of this utility model is exactly to overcome the above-mentioned defect and insecurity and the perfect solution of one that provides that TPO perforated film occurs: the laminated film technology by one with embedded window (hole) structure realizes the controllable release of film to steam, does not make to occur in bag film ponding; The fresh goods such as the fruits and vegetables of packaging and external environment condition can not be made again to be formed contact and reach Keep the quality and freshness simultaneously.
Utility model content
The purpose of this utility model overcomes existing TPO plastic sheeting to the defect that the fresh goods packagings such as fruit and vegetable exist and potential safety hazard, provides a kind of laminated film with embedded window structure.The laminated film that this kind has embedded window structure has controlled regulating action to moisture content and aqueous vapor.Be applicable to the fresh-keeping of the fresh goods such as fruit, vegetables and store, this laminated film with embedded window structure of the utility model is suitable for normal temperature and low temperature uses, and is not suitable for applied at elevated temperature.
The purpose of this utility model realizes one of at least by following technical solution.
Have a laminated film for embedded window structure, be composited by three-layer thin-film, wherein, intermediate layer is the perforated film material of polyolefin (PO) class; Upper and lower two layers are hydrophilic resin polyvinyl alcohol (PVA) film, and upper and lower two-layer film forms the confining bed to intermediate layer perforated film hole; The penetrating hole of the perforated film material of intermediate polyolefin (PO) class is at upper and lower double-layer films compound tense, make the two-layer polyvinyl alcohol of upper and lower layer (PVA) material embed while compound and close the hole of intermediate layer TPO perforated film, formation can discharge steam and have again the window that can intercept other gases; Other gases described comprise in oxygen, carbon dioxide more than one.
Further optimally, described intermediate layer is polyolefin (PO) class plastic sheeting, and polyolefin (PO) class material is polyethylene (PE) or polypropylene (PP) material; Described TPO film is inflation film, cast film or biaxially oriented film.
Further optimally, polyolefin (PO) class material comprises low density polyethylene (LDPE) (LDPE), high density polyethylene (HDPE) (HDPE), LLDPE (LLDPE), HOPP or COPP material;
Further optimally, polyvinyl alcohol (PVA) material that described laminated film uses is the polyvinyl alcohol (PVA) of high alcoholysis degree: namely 0599,1599,1799,2099,2299,2499.
Further optimally, described polyolefin (PO) class thin-film material thickness is 5 μm ~ 100 μm, and usual thickness is 20 μ--40 μm.
Further optimally, upper and lower two layer thicknesses of described laminated film are: 3 μm--20 μm.
Further optimally, described polyolefin (PO) film double-sided is through polarity process, and polarity is treated to sided corona treatment or oxidation processes.
Further optimally, multiple spaces of described polyolefin (PO) class thin-film material are uniformly distributed; The hole that described polyolefin (PO) class film is beaten is permeability hole, and hole is the circular through-hole not with water caltrop, and the aperture of punching is 0.1 ~ 2.0mm; Namely the punch ratio of the gross area/film gross area of described polyolefin (PO) class film perforating rate is 1% ~ 50%.
Further optimally, containing the composite elasticizer of glycerine as film in polyvinyl alcohol (PVA) filmogen that described laminated film uses, qualities of glycerin content is: 5% ~ 15%.
There is described in preparation the method for the laminated film of embedded window structure, specifically: polyolefin (PO) the class material in intermediate layer adopts inflation film, cast film or biaxially oriented film, after two-sided polarity process, obtain polyolefin (PO) class film again, polyolefin (PO) class film evenly punches; Polyvinyl alcohol filmogen is adopted to be compounded to form the composite film material with embedded window structure on polyolefin (PO) class film two sides; Polyvinyl alcohol filmogen is made up of polyvinyl alcohol (PVA-1799) and plasticizer; The mode of described compound is cloth of coating-type composite membrane-forming or melt extrudes composite membrane-forming; Described cloth of coating-type composite membrane-forming be roller coat formula or blade coating formula two-sided while composite membrane-forming; Described melt extrude composite membrane-forming for melt extrude rear calendering formula two-sided while composite membrane-forming.
This laminated film three-layer composite structure of the utility model, intermediate layer is conventional TPO film; This film is formed by punching the gas permeation window of permeability; Upper and lower composite bed is the film that polyvinyl alcohol (PVA) material is formed, and then makes three layers of compound by complex technique, and upper and lower two layers embed and hole that closed intermediate polyolefin thin layer is penetrating and form controlled atmosphere window simultaneously.The utility model is in order to intercept other gases by window while can discharging steam, and this window must use and a kind ofly namely by steam but not carry out selection by the material of other gases and intercept.And polyvinyl alcohol (PVA) is as the very strong material of a kind of hydrophily, its film not only has excellent barrier property to oxygen, have again simultaneously high-permeability to steam (as normal temperature 23 DEG C, PVA film to the transmitance of steam up to 147gH
2o/m
2/ 24hr; Note: the relative humidity of film both sides is 50/70%), so, laminated film of the present utility model select polyvinyl alcohol (PVA) as laminated film up and down two layers carry out compound, make polyvinyl alcohol hole penetrating to middle TPO perforated film in laminated film carry out embedded closing, being formed can vapor pervious but simultaneously have the window of blocking oxygen.
This have that not only can to realize steam burst size by window area variable by the window of the embedded closed formation of vapor pervious material controlled and adjustable, and the contact simultaneously intercepted by window and other gases and exchange.
Compared with prior art, the utility model tool has the following advantages and technique effect:
Laminated film prepared by this application utility model technology, has excellent barrier property to oxygen, carbon dioxide etc.;
Due to by Embedded composite construction, make penetrating hole in TPO membrane middle layer all by polyvinyl alcohol material membrane sealed, so both had the performance of release steam, there is again the performance of the gas such as blocking oxygen, carbon dioxide simultaneously;
Simultaneously compound due to polyvinyl alcohol film two-sidedly to carry out, and be by intermediate thin rete between penetrating hole carry out embedded compound, the film of upper and lower two layers passes through the hole formation one of intermediate film, not only solve the problem that polyvinyl alcohol is not easy compound, also solve the pollution using adhesive compound simultaneously;
Owing to making two-sided polyvinyl alcohol material carry out embedded compound by the penetrating hole of intermediate polyolefin, enclose hole penetrating on polyolefin film completely and define and be moisture vapor permeable with polyvinyl alcohol film but other other passage (window) thoroughly; The selective gas achieving permeable not oxygen flow regulates film.
This gas regulation laminated film with vapor pervious not oxygen flow, its ratio regulating passage (window) can account for the film gross area according to the intermediate layer polyolefin film punching gross area realizes controllable.
Accompanying drawing explanation
Fig. 1 is the three-decker schematic diagram of laminated film.
Fig. 2 is the window schematic diagram formed after upper and lower two layers of polyethylene alcohol (PVA) compound embeds intermediate layer.
Fig. 3 is three layers of laminated film coating combination process schematic diagram.
Fig. 4 is for melt extruding laminated film process schematic representation.
Detailed description of the invention
Below in conjunction with specific embodiment, further concrete detailed description in detail is done to the utility model, but enforcement of the present utility model and protection domain are not limited thereto.
As Fig. 1, laminated film of the present utility model is three-layer composite structure: intermediate layer is the perforated film 102 of TPO; Upper and lower two layers is the membrane sealed layer (101,102) of moisture vapor permeable; Penetrating hole on intermediate thin rete, when upper and lower Film laminated, is closed because levels thin-film material embeds and formation can discharge steam and have the window (as Fig. 2) that can intercept other gases.Intermediate layer is the polyolefine material film of high-barrier steam, and punching forms the penetrating hole (window) of some according to requirements simultaneously, as the passage for discharging moisture content.
Embodiment 1
Laminated film intermediate layer film: the bidirectional stretching polypropylene film (BOPP) that thickness is 20 μm, after two-sided sided corona treatment, film evenly punches, and punching aperture is 0.3mm, punching rate (the punching gross area/film gross area): 3%; Adopt polyvinyl alcohol water solution two-sided roller coat composite membrane-forming method.Polyvinyl alcohol water solution base material is polyvinyl alcohol (PVA-1799), glycerine, water composition; Solution solid content is 23%, and wherein glycerol content is 10%.Two-sided simultaneously with the coating of polyvinyl alcohol water solution roller coat, through gas suspension dry composite film forming, as shown in Figure 3.
This laminated film normal temperature (23 DEG C) water permeability is as shown in table 1.
Table 1
Embodiment 2
Laminated film intermediate layer film: the LLDPE inflation film of thickness 15 μm, after two-sided sided corona treatment, film evenly punches, and punching aperture is 0.2mm, punching rate (the punching gross area/film gross area): 5%; Adopt polyvinyl alcohol water solution two-sided roller coat composite membrane-forming method.Polyvinyl alcohol water solution base material is polyvinyl alcohol (PVA-2099), glycerine, water composition, and solution solid content is 20%, and wherein glycerol content is 5%, two-sided simultaneously with the coating of polyvinyl alcohol water solution roller coat, through gas suspension dry composite film forming, as shown in Figure 3.
This laminated film normal temperature (23 DEG C) water permeability is as shown in table 2.
Table 2
Embodiment 3
Laminated film intermediate layer film: the tape casting polypropylene film (OPP) of thickness 30 μm, after two-sided sided corona treatment, film evenly punches, and punching aperture is 0.1mm, punching rate (the punching gross area/film gross area): 15%; Adopt polyvinyl alcohol water solution two-sided roller coat composite membrane-forming method.Polyvinyl alcohol water solution base material is polyvinyl alcohol (PVA-1799:40%; PVA0599:60%), glycerine, water composition, solution solid content is 26%, and wherein glycerol content is 15%, two-sided simultaneously with the coating of polyvinyl alcohol water solution roller coat, through gas suspension dry composite film forming.
This laminated film normal temperature (23 DEG C) water permeability is as shown in table 3.
Table 3
Embodiment 4
Laminated film intermediate layer film: thickness 28 μm of bidirectional stretching polypropylene films (BOPP), after two-sided sided corona treatment, film evenly punches, and punching aperture is 1.0mm, punching rate (the punching gross area/film gross area): 20%; Adopt polyvinyl alcohol to melt extrude two roll-ins and prolong composite membrane-forming.Two-sided simultaneously by the polyvinyl alcohol composite material film forming extruded, polyvinyl alcohol material is: polyvinyl alcohol (PVA0599:70%; PVA1599:30%), described composite elasticizer, the plasticizing of use screw extruder enter tri-roll press machine after extruding and carry out calendering composite membrane-forming.As A and B in Fig. 4, figure is respectively polyvinyl alcohol (PVA) melt extruder.
This laminated film normal temperature (23 DEG C) water permeability is as table 4.
Table 4
Table 5
Embodiment 5
Laminated film intermediate layer film: the HDPE film of thickness 12 μm of blow moldings, after two-sided sided corona treatment, film evenly punches, and punching aperture is 0.1mm, punching rate (the punching gross area/film gross area): 12%; Adopt polyvinyl alcohol water solution two-sided roller coat composite membrane-forming method.Polyvinyl alcohol water solution base material is polyvinyl alcohol (PVA-2299:20; PVA-0599:80%), glycerine, water composition, solution solid content is 21%, and wherein glycerol content is 5%, two-sided simultaneously with the coating of polyvinyl alcohol water solution roller coat, through gas suspension dry composite film forming.This laminated film normal temperature (23 DEG C) water permeability is as shown in table 5.
Claims (7)
1. have a laminated film for embedded window structure, it is characterized in that being composited by three-layer thin-film, wherein, intermediate layer is the perforated film material of TPO; Upper and lower two layers are hydrophilic resin polyvinyl alcohol film, and upper and lower two-layer film forms the confining bed to intermediate layer perforated film hole; The penetrating hole of the perforated film material of intermediate polyolefin class is at upper and lower double-layer films compound tense, make the two-layer polyvinyl alcohol material of upper and lower layer embed while compound and close the hole of intermediate layer TPO perforated film, formation can discharge steam and have again the window that can intercept other gases; Other gases described comprise in oxygen, carbon dioxide more than one.
2. a kind of laminated film with embedded window structure according to claim 1, it is characterized in that: described intermediate layer is TPO plastic sheeting, polyolefin based materials is polyethylene or polypropylene material; Described TPO film is inflation film, cast film or biaxially oriented film.
3. a kind of laminated film with embedded window structure according to claim 2, is characterized in that: polyolefin based materials comprises low density polyethylene (LDPE), high density polyethylene (HDPE), LLDPE, HOPP or COPP material.
4. a kind of laminated film with embedded window structure according to claim 1, it is characterized in that, polyvinyl alcohol (PVA) material that described laminated film uses is the polyvinyl alcohol of high alcoholysis degree, i.e. 0599,1599,1799,2099,2299 or 2499 polyvinyl alcohol.
5. a kind of laminated film with embedded window structure according to claim 1, is characterized in that, described TPO thin-film material thickness is 5 μm ~ 100 μm.
6. a kind of laminated film with embedded window structure according to claim 1, is characterized in that, upper and lower two layer thicknesses of described laminated film are: 3 μm--20 μm.
7. a kind of laminated film with embedded window structure according to claim 1, is characterized in that, multiple spaces of described TPO thin-film material are uniformly distributed; The hole that described TPO film is beaten is permeability hole, and hole is the circular through-hole not with water caltrop, and the aperture of punching is 0.1 ~ 2.0mm; Namely the punch ratio of the gross area/film gross area of described TPO film perforating rate is 1% ~ 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520681327.XU CN205044229U (en) | 2015-09-06 | 2015-09-06 | Composite films with embedded window structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520681327.XU CN205044229U (en) | 2015-09-06 | 2015-09-06 | Composite films with embedded window structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205044229U true CN205044229U (en) | 2016-02-24 |
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ID=55337839
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520681327.XU Expired - Fee Related CN205044229U (en) | 2015-09-06 | 2015-09-06 | Composite films with embedded window structure |
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| Country | Link |
|---|---|
| CN (1) | CN205044229U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106674576A (en) * | 2017-01-04 | 2017-05-17 | 上海海洋大学 | Fresh-keeping film with function of controlling respiration of fruits and vegetables and method for preparing fresh-keeping film |
-
2015
- 2015-09-06 CN CN201520681327.XU patent/CN205044229U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106674576A (en) * | 2017-01-04 | 2017-05-17 | 上海海洋大学 | Fresh-keeping film with function of controlling respiration of fruits and vegetables and method for preparing fresh-keeping film |
| CN106674576B (en) * | 2017-01-04 | 2019-05-07 | 上海海洋大学 | A kind of control fruits and vegetables breathing preservative film and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 |