CN203611513U - High-barrier PVC (polyvinyl chloride) composite sheet - Google Patents
High-barrier PVC (polyvinyl chloride) composite sheet Download PDFInfo
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- CN203611513U CN203611513U CN201320605414.8U CN201320605414U CN203611513U CN 203611513 U CN203611513 U CN 203611513U CN 201320605414 U CN201320605414 U CN 201320605414U CN 203611513 U CN203611513 U CN 203611513U
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Abstract
The utility model discloses a high-barrier PVC (polyvinyl chloride) composite sheet which comprises a PVC sheet layer, wherein a barrier composite film is composited on the surface of one side of the PVC sheet layer through an adhesive layer in a hot-pressing manner and comprises two heat-seal layers and an oxygen barrier layer clamped between the two heat-seal layers; one or two of a PE (polyethylene) material and a PP (polypropylene) material is or are selected as the heat-seal layers; one of a PVDC (polyvinyl dichloride) material, a PA (polyamide) material and an EVOH (ethylene vinyl-alcohol copolymer) material is selected as the oxygen barrier layer, and a PU adhesive material is selected as the adhesive layer; and the barrier composite film is most preferably a coextrusion blow molding film, the number of layers is odd number, and the layers of the film are symmetrically arranged relative to a center layer of the film. The high-barrier PVC composite sheet is obtained through hot-pressing composition of the barrier composite film and the PVC sheet layer, so that the barrier property of the PVC sheet is enhanced, and the manufacturing process of the PVC composite sheet is simplified; the oxygen barrier layer is clamped between the two heat-seal layers, so that the oxygen barrier property of the oxygen barrier layer is prevented from being influenced by humidity; and the high-barrier PVC composite sheet is used for making a thermal forming packaging box for packaging fresh meat.
Description
Technical field
The utility model relates to composite sheet, is specifically related to a kind of high-barrier PVC composite sheet.
Background technology
Polyvinyl chloride (PVC), as a kind of general-purpose plastics, is widely used in packaging for foodstuff field, as sheet heat forming box.Because PVC contains plasticizer, PVC sheet material is as the thermoforming box of packaging for foodstuff, also need with polyethylene (PE) or polypropylene (PP) compound, to avoid PVC directly to contact with food.But the barrier property of PVC is not good, and PE and PP oxygen barrier poor, seriously restricted its application as high-end packaging fields such as fresh meat packing boxes.
In order to improve the oxygen barrier of PVC sheet material, the Chinese patent that application number is 200920232543.0 discloses a kind of PVC, polyethylene-polyvinyl alcohol copolymer (EVOH) composite hard sheet, and PVC and EVOH are bondd and fixed the barrier with Reinforced PVC by adhesive-layer.But the barrier of EVOH is subject to the impact of humidity, this composite hard sheet is not suitable as containing wet provision as the packaging material of fresh meat.
Utility model content
It is poor or have barrier but can be subject to the problem of humidity effect that the purpose of this utility model is to solve PVC sheet material barrier in prior art.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of high-barrier PVC composite sheet is provided, it comprises PVC sheet layer, PVC sheet layer one side surface is compounded with barrier laminated film by adhesive layer hot pressing, and barrier laminated film comprises two-layer hot sealing layer and is clipped in the oxidation prevention layer between two-layer hot sealing layer.In this technical scheme, compound due to barrier laminated film and PVC sheet layer, has strengthened the barrier of PVC sheet material; And oxidation prevention layer is sandwiched in two-layer hot sealing layer, the oxygen barrier of avoiding the oxidation prevention layers such as EVOH is affected because of humidity.
Can be selected from one or both in PE and PP material for described hot sealing layer, the one that can be selected from polyvinylidene chloride (PVDC), polyamide (PA) and EVOH material is described oxidation prevention layer, and selecting polyurethane (PU) adhesive material is described adhesive layer.The preferably PU adhesive material of resistance to boiling.Because hot sealing layer is non-polar polymer, there is good water preventing ability, can further avoid the oxygen barrier of oxidation prevention layer to be subject to humidity effect.
Described barrier laminated film can be coextrusion blow film.Coextrusion blow method can make that thickness is thinner, the more uniform laminated film of performance, is applicable to the coextrusion blow of the materials such as PE, PP, PVDC, PA, EVOH, and then also improves the performance uniformity of PVC composite sheet, reduces costs.Certainly, described barrier laminated film also can adopt additive method manufacture, as the tape casting etc.But employing coextrusion blow film passes through adhesive layer directly and the hot pressing of PVC sheet layer is compound, can simplify the manufacturing process of this high-barrier composite sheet.
The number of plies of described barrier laminated film is preferably odd number, and with respect to its central core symmetric arrays, with respect to the central core symmetric arrays of described barrier laminated film, with avoid coextrusion blow film process and with PVC hot pressing recombination process in there is curling, perk because of heat.
Also can be with being provided with ethylene-vinyl acetate copolymer (EVA) material binding layer between the described hot sealing layer of the both sides of described oxidation prevention layer and with it vicinity.Manufacture in the process of described barrier laminated film in coextrusion blow method, between co-extrusion die head internal resistance oxygen layer material runner and two hot sealing layer material runner, can respectively set up a runner for passing into EVA molten resin, coextrusion blow together with oxidation prevention layer material, hot sealing layer material.Tack coat is set and is conducive to improve the caking property between oxidation prevention layer and hot sealing layer.
In order to prevent impaired with the hot sealing layer on barrier laminated film surface described in PVC heat-sealing compound tense, between both sides that can also preferred described oxidation prevention layer and with it contiguous described hot sealing layer, with being provided with one or two-layer water blocking layer, and the one being selected from PE and PP material is water blocking layer.In this case, even if the hot sealing layer on described barrier laminated film surface is impaired with PVC heat-sealing compound tense, because can not making the oxygen barrier of oxidation prevention layer yet, the existence of the water blocking layer of setting up is affected.Certainly, in this case, also can be with being provided with EVA material binding layer, to improve the adhesion strength between water blocking layer and oxidation prevention layer between the both sides of described oxidation prevention layer and with it the most contiguous water blocking layer.
In described barrier laminated film, the number of plies of described oxidation prevention layer can also be two-layer, and between described oxidation prevention layer, is also provided with EVA material binding layer, further to improve the barrier of PVC composite sheet,
In described barrier laminated film, the number of plies of described oxidation prevention layer can also be two-layer, and between described oxidation prevention layer, is also provided with EVOH material and protects fragrant layer, and to select PA material be described oxidation prevention layer, further to enrich the all-round barrier of PVC composite sheet.
Advantage of the present utility model and beneficial effect are, this high-barrier PVC composite sheet:
One, adopt the compound of barrier laminated film and PVC sheet layer, strengthened the barrier of PVC sheet material; And oxidation prevention layer is sandwiched in two-layer hot sealing layer, the oxygen barrier of avoiding the oxidation prevention layers such as EVOH is affected because of humidity.
Two, barrier laminated film can adopt the moulding of coextrusion blow method, both the performance uniformity that had improved PVC composite sheet, has reduced again cost, and coextrusion blow film and PVC sheet material are combined with each other by the hot pressing of PU adhesive layer, simplify the manufacturing process of PVC composite sheet, method environmental protection.
Three, barrier laminated film has symmetric arrays structure, can prevent from, in itself and PVC hot pressing recombination process, curling, perk occurs.
Four, resistance oxygen, block-water performance is good, and between each layer, adhesion strength is high.
This high-barrier PVC composite sheet is used as the thermoforming packing box of packing fresh meat, can also be used for other and need to hinder oxygen, the wet high-end packaging field of resistance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model high-barrier PVC composite sheet in embodiment 1;
Fig. 2 is the structural representation of the utility model high-barrier PVC composite sheet in embodiment 2;
Fig. 3 is the structural representation of the utility model high-barrier PVC composite sheet in embodiment 3;
Fig. 4 is the structural representation of the utility model high-barrier PVC composite sheet in embodiment 4;
Fig. 5 is the structural representation of the utility model high-barrier PVC composite sheet in embodiment 5;
Fig. 6 is the structural representation of the utility model high-barrier PVC composite sheet in embodiment 6.
In figure: 1, PVC sheet layer; 2, hot sealing layer; 3, oxidation prevention layer; 4, tack coat; 5, water blocking layer; 6, protect fragrant layer; 7, adhesive layer.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is further described.Following examples are only for the technical solution of the utility model is more clearly described, and can not limit protection domain of the present utility model with this.
Embodiment 1
The utility model is a kind of high-barrier PVC composite sheet, and as shown in Figure 1, its structure expression is PVC/PU/PE/EVOH/PE from bottom to up, and here, PVC is PVC sheet layer 1, and thickness is 420 ~ 440 microns, and PVC sheet layer 1 surface is coated with PU adhesive layer 7; PE/EVOH/PE is the coextrusion blow film of coextrusion blow method, and thickness is 70 ~ 80 microns, and wherein PE is hot sealing layer 2, and EVOH is oxidation prevention layer 3.PVC sheet layer 1 is combined with each other by 7 hot pressing of PU adhesive layer with PE/EVOH/PE coextrusion blow film.
Certainly also available PVDC or the replacement of PA material of oxidation prevention layer 3; Hot sealing layer 2 can be all also that PP material or a hot sealing layer 2 are PE, and another hot sealing layer 2 is PP materials.Film can also not obtain by coextrusion blow method, but obtains by flow casting molding.
The utility model is a kind of high-barrier PVC composite sheet, and as shown in Figure 2, its structure expression is PVC/PU/PE/EVA/EVOH/EVA/PE from bottom to up, here, PVC refers to PVC sheet layer 1, and thickness is 400 ~ 420 microns, and PVC sheet layer 1 surface is coated with the PU adhesive layer 7 of resistance to boiling; PE/EVA/EVOH/EVA/PE is the coextrusion blow film of coextrusion blow method, and thickness is 70 ~ 80 microns, and wherein PE is hot sealing layer 2, and EVA is tack coat 4, and EVOH is oxidation prevention layer 3.PVC sheet layer 1 is combined with each other by 7 hot pressing of PU adhesive layer with PE/EVA/EVOH/EVA/PE coextrusion blow film.
Certainly also available PVDC or the replacement of PA material of oxidation prevention layer 3.Hot sealing layer 2 also can be PP or a hot sealing layer 2 is PE, and another hot sealing layer 2 is PP material.
The utility model is a kind of high-barrier PVC composite sheet, and as shown in Figure 3, its structure expression is PVC/PU/PE/PE/EVOH/PE/PE from bottom to up, here, PVC refers to PVC sheet layer 1, and thickness is 390 ~ 410 microns, and PVC sheet layer 1 surface is coated with the PU adhesive layer 7 of resistance to boiling; PE/PE/EVOH/PE/PE is the coextrusion blow film of coextrusion blow method, and thickness is 80 ~ 90 microns, and wherein outermost two-layer PE is hot sealing layer 2, and all the other PE are water blocking layers 5, and EVOH is oxidation prevention layer 3.PVC sheet layer 1 is combined with each other by 7 hot pressing of PU adhesive layer with PE/PE/EVOH/PE/PE coextrusion blow film.
Certainly also available PVDC or the replacement of PA material of oxidation prevention layer 3.The number of plies of the water blocking layer 5 between the hot sealing layer 2 of oxidation prevention layer 3 and its both sides also rises to two-layer.And hot sealing layer 2 and/or water blocking layer 5 can also be PP materials.
The utility model is a kind of high-barrier PVC composite sheet, and as shown in Figure 4, its structure expression is PVC/PU/PE/PE/EVA/EVOH/EVA/PE/PE from bottom to up, here, PVC refers to PVC sheet layer 1, and thickness is 350 ~ 370 microns, and PVC sheet layer 1 surface is coated with the PU adhesive layer 7 of resistance to boiling; PE/PE/EVA/EVOH/EVA/PE/PE is the coextrusion blow film of coextrusion blow method, and thickness is 80 ~ 90 microns, and wherein outermost two-layer PE is hot sealing layer 2, and all the other PE are water blocking layers 5, and EVA is tack coat 4, and EVOH is oxidation prevention layer 3.PVC sheet layer 1 is combined with each other by 7 hot pressing of PU adhesive layer with PE/PE/EVA/EVOH/EVA/PE/PE coextrusion blow film.
Certainly also available PVDC or the replacement of PA material of oxidation prevention layer 3.The number of plies of the water blocking layer 5 between the hot sealing layer 2 of oxidation prevention layer 3 and its both sides also rises to two-layer.And hot sealing layer 2 and/or water blocking layer 5 can also be PP materials.
Embodiment 5
The utility model is a kind of high-barrier PVC composite sheet, and as shown in Figure 5, its structure expression is PVC/PU/PE/EVOH/EVA/EVOH/PE from bottom to up, here, PVC refers to PVC sheet layer 1, and thickness is 350 ~ 370 microns, and PVC sheet layer 1 surface is coated with the PU adhesive layer 7 of resistance to boiling; PE/EVOH/EVA/EVOH/PE is the coextrusion blow film of coextrusion blow method, and thickness is 80 ~ 90 microns, and wherein PE is hot sealing layer 2, and EVA is tack coat 4, and EVOH is oxidation prevention layer 3.PVC sheet layer 1 is combined with each other by 7 hot pressing of PU adhesive layer with PE/EVOH/EVA/EVOH/PE coextrusion blow film.
Certainly also available PVDC or the replacement of PA material of oxidation prevention layer 3.The number of plies of the water blocking layer 5 between the hot sealing layer 2 of oxidation prevention layer 3 and its both sides also rises to two-layer.Hot sealing layer 2 can also be PP material.
Embodiment 6
The utility model is a kind of high-barrier PVC composite sheet, and as shown in Figure 6, its structure expression is PVC/PU/PE/EVA/PA/EVOH/PA/EVA/PE from bottom to up, here, PVC refers to PVC sheet layer 1, and thickness is 350 ~ 370 microns, and PVC sheet layer 1 surface is coated with the PU adhesive layer 7 of resistance to boiling; PE/EVA/PA/EVOH/PA/EVA/PE is the coextrusion blow film of coextrusion blow method, and thickness is 80 ~ 90 microns, and wherein PE is hot sealing layer 2, and EVA is tack coat 4, and PA is oxidation prevention layer 3, and EVOH protects fragrant layer 6.PVC sheet layer 1 is combined with each other by 7 hot pressing of PU adhesive layer with PE/EVA/PA/EVOH/PA/EVA/PE coextrusion blow film.
Certainly also available PVDC or the replacement of EVOH material of oxidation prevention layer 3.
The above is only preferred embodiment of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (9)
1. a high-barrier PVC composite sheet, it is characterized in that, comprise PVC sheet layer, PVC sheet layer one side surface is compounded with barrier laminated film by adhesive layer hot pressing, and barrier laminated film comprises two-layer hot sealing layer and is clipped in the oxidation prevention layer between two-layer hot sealing layer.
2. high-barrier PVC composite sheet as claimed in claim 1, is characterized in that, is selected from one or both in PE and PP material for described hot sealing layer, and the one being selected from PVDC, PA and EVOH material is described oxidation prevention layer, and selecting PU adhesive material is described adhesive layer.
3. high-barrier PVC composite sheet as claimed in claim 2, is characterized in that, described barrier laminated film is coextrusion blow film.
4. high-barrier PVC composite sheet as claimed in claim 3, is characterized in that, the number of plies of described barrier laminated film is odd number, and with respect to its central core symmetric arrays.
5. high-barrier PVC composite sheet as claimed in claim 4, is characterized in that, the same EVA material binding layer that is provided with between the described hot sealing layer of the both sides of described oxidation prevention layer and with it vicinity.
6. high-barrier PVC composite sheet as claimed in claim 4, is characterized in that, between the both sides of described oxidation prevention layer and with it contiguous described hot sealing layer, with being provided with one or two-layer water blocking layer, and the one being selected from PE and PP material is water blocking layer.
7. high-barrier PVC composite sheet as claimed in claim 6, is characterized in that, between the both sides of described oxidation prevention layer and with it the most contiguous water blocking layer with being provided with EVA material binding layer.
8. the high-barrier PVC composite sheet as described in claim 4 to 7 any one, is characterized in that, the number of plies of described oxidation prevention layer is two-layer, and between described oxidation prevention layer, is also provided with EVA material binding layer.
9. the high-barrier PVC composite sheet as described in claim 4 to 7 any one, is characterized in that, the number of plies of described oxidation prevention layer is two-layer, and between described oxidation prevention layer, is also provided with EVOH material and protects fragrant layer, and to select PA material be described oxidation prevention layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320605414.8U CN203611513U (en) | 2013-09-27 | 2013-09-27 | High-barrier PVC (polyvinyl chloride) composite sheet |
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| CN201320605414.8U CN203611513U (en) | 2013-09-27 | 2013-09-27 | High-barrier PVC (polyvinyl chloride) composite sheet |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105109830A (en) * | 2015-08-11 | 2015-12-02 | 福建农林大学 | Packaging method for adult monochamus alternatus attractant lure core |
| CN108045045A (en) * | 2017-12-13 | 2018-05-18 | 邱诗俊 | A kind of high-barrier food-film and preparation method thereof |
| CN108773140A (en) * | 2018-06-05 | 2018-11-09 | 洛阳兴瑞新材料科技有限公司 | A kind of nano modification high-barrier composite membrane and production method |
| CN109473032A (en) * | 2018-12-30 | 2019-03-15 | 深圳市通产丽星股份有限公司 | A kind of label and preparation method thereof and labeling hose |
| CN110271251A (en) * | 2018-03-14 | 2019-09-24 | 中国人民解放军62023部队 | A kind of seven-layer co-extrusion high-isolating composite material and preparation method |
-
2013
- 2013-09-27 CN CN201320605414.8U patent/CN203611513U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105109830A (en) * | 2015-08-11 | 2015-12-02 | 福建农林大学 | Packaging method for adult monochamus alternatus attractant lure core |
| CN108045045A (en) * | 2017-12-13 | 2018-05-18 | 邱诗俊 | A kind of high-barrier food-film and preparation method thereof |
| CN110271251A (en) * | 2018-03-14 | 2019-09-24 | 中国人民解放军62023部队 | A kind of seven-layer co-extrusion high-isolating composite material and preparation method |
| CN108773140A (en) * | 2018-06-05 | 2018-11-09 | 洛阳兴瑞新材料科技有限公司 | A kind of nano modification high-barrier composite membrane and production method |
| CN108773140B (en) * | 2018-06-05 | 2024-04-05 | 洛阳兴瑞新型膜材料有限公司 | Nano modified high-barrier composite film and production method thereof |
| CN109473032A (en) * | 2018-12-30 | 2019-03-15 | 深圳市通产丽星股份有限公司 | A kind of label and preparation method thereof and labeling hose |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214400 No.2 Tonggang Road, Changjing Town, Jiangyin, Wuxi, Jiangsu Province Patentee after: Shenghui New Material Co.,Ltd. Address before: 214400 No.2 Tonggang Road, Changjing Town, Jiangyin, Wuxi, Jiangsu Province Patentee before: Shenghui new materials Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 214400 No.2 Tonggang Road, Changjing Town, Jiangyin, Wuxi, Jiangsu Province Patentee after: Shenghui new materials Co.,Ltd. Address before: 214400 No.2 Tonggang Road, Changjing Industrial Park, Jiangyin, Wuxi, Jiangsu Province Patentee before: JIANGYIN SUNRISE PACKAGING MATERIAL Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140528 |