CN203111729U - Ten-layer co-extrusion packaging film - Google Patents
Ten-layer co-extrusion packaging film Download PDFInfo
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- CN203111729U CN203111729U CN 201220673667 CN201220673667U CN203111729U CN 203111729 U CN203111729 U CN 203111729U CN 201220673667 CN201220673667 CN 201220673667 CN 201220673667 U CN201220673667 U CN 201220673667U CN 203111729 U CN203111729 U CN 203111729U
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Abstract
The utility model discloses a ten-layer co-extrusion packaging film in a ten-layer co-extrusion layered structure. The lowest layer of the film, fitting a packaged object, is a waterproof breathable layer; the ten-layer structure comprises 6-9 waterproof breathable layers, an adhesive layers are arranged among the waterproof breathable layers, and the total number of the adhesive layers and the waterproof breathable layer is 10; or the ten-layer structure comprises 2-7 waterproof breathable layers and 1-6 oxygen barrier layers, the total number of the waterproof breathable layers and the oxygen barrier layers is 6-8, at least one oxygen barrier layer is clamped between two waterproof breathable layers, one adhesive layer is clamped between the adjacent oxygen barrier layer and the waterproof breathable layer, and the total number of the adhesive layers, the waterproof breathable layers and the oxygen barrier layers is 10. Compared with a traditional film, the packaging film provided by the utility model has greater flexibility on the functional design of each layer of the film, has more optimized film structure design, and outstanding comprehensive performance.
Description
Technical field
The utility model relates to a kind of packaging film, is specifically related to a kind of ten layers of co-extrusion packing film, belongs to the flexible packaging film technical field.
Background technology
In recent years, raising along with living standards of the people, the food kind is more and more abundanter, people are also more and more higher to the quality requirements of food, and then more and more diversified requirement is proposed also the packing of food, such as requiring to pack fruit-vegetable food, the packing of food such as fresh meat have the permeability to air of blocking water, be used for packed and cooled fresh meat, the packing of food such as bean product have resistance oxygen, be used for packing milk powder, the packing of savory food such as coffee and cheese have resistance oxygen and intercept fragrance, are used for packing cooked meat product, rice etc. add man-hour or edible before need the packaging material for food of high temperature boiling to have barrier and boiling resistance.
Wherein, be used for packing the ventilative packaging film of blocking water of fruits and vegetables, fresh meat and mainly play the effect that in fruits and vegetables, fresh meat preservation process, keeps moisture in it, the inside and outside oxygen circulation of assurance simultaneously and prevent the anaerobe procreation.Being used for the resistance oxygen packaging film of packed and cooled fresh meat, bean product mainly plays blocking oxygen, prevents microbial growth and inhibitory enzyme activity and then prevents fat and the effect of the oxidation deterioration of protein.Be used for packing the obstruct fragrance packaging film that milk powder, coffee and cheese etc. have fragrance food, mainly play isolation oxygen, keep the effect of packed article original flavor simultaneously.Be used for packing the retort packaging film of cooked meat product and rice, mainly for adapt to food in the early stage course of processing required 121 degrees centigrade of digesting technoloys in order to avoid the entering or the volatilization of fragrance of peculiar smell in the digestion process, or for adapt to the client purchase after the food can be in water directly edible requirement after the boiling.
Above-mentioned several packing films all can be realized by multi-layer co-extruded packing film.Such as the breathable films that blocks water, it mainly is bonded on the heat-sealing film and realizes by having ventilated membrane, generally having 3-tier architecture, comprise adhesive linkage, the air-permeable layer that blocks water and hot sealing layer, is that Chinese patent and the grant number of CN201737296U is the Chinese patent of CN101870389A as grant number.And for example hinder the oxygen packaging film, according to intercepting the difference that requires, usually can adopt among PA, EVOH, the PVDC one or more as barrier material, obtain with other block water gas permeable material and adhesive linkage co-extrusions again, generally having 3-9 layer structure, is that the Chinese patent of CN201693819U, the Chinese patent that application number is CN102514328A, Chinese patent and the grant number that grant number is CN1156361C are the Chinese patent of CN2799232Y as grant number.And for example intercept the fragrance packaging film, it mainly adopts the EVOH resin material as barrier material, obtains with other gas permeable materials that block water, oxygen barrier material and adhesives co-extrusion, generally has 5-7 layer structure, is 200910011252.3 Chinese patent as application number.The film of anti-boiling for another example, it mainly is to obtain by PP and PA or PVDC co-extrusion, is that Chinese patent and the application number of CN102173143A is the Chinese patent of CN102731726A as application number, generally has 3-tier architecture.
Above-mentioned several functional membranes, its concrete function all can be regulated by the variation that changes the selected material of each layer of film according to customer demand.Except above-mentioned several functional requirements, in specific application scenario, also need packing film to have other some additional functions sometimes, as the needs in order to satisfy carrying and to transport, film must have stronger mechanical property; In order to satisfy the needs of sterilization, film also needs to have certain resistance to heat; In order to satisfy the needs that sealing is preserved, film also needs to have certain heat sealability.Certainly, these additional functions also can be realized by selecting specific resin raw material for use.
But, present multi-layer co-extruded film, its defective is: the co-extrusion number of plies of film is still lower, mostly is below 9 layers, is unfavorable for the concrete structure of each layer of flexible design film, and the flexibility ratio that the film function is regulated is not enough; And the low raising that impairs its barrier of the number of plies of film such as under the low situation of the number of plies, in order to increase barriering effect, must increase the thickness of barrier layer, but the increase that also brings manufacturing cost simultaneously.In addition, for the coextruded film of the multilayer of having developed at present, namely can realize the higher co-extrusion number of plies, but still have on the functional configuration of each layer of film improperly.Such as, grant number is disclosed high resistively nine-layer coextrusion blow film in the Chinese patent of CN2799232Y, this film has barrier, mechanical property and optical property preferably, but between this thin layer be dissymmetrical structure, depress in the process of coextrusion blow molding together in equality of temperature, because the different unequal power distributions that certainly lead to of material crystallization point and crystalline rate, and then directly cause film to curl; In addition, film is low in a side force intensity of applying packed article, causes this bottom breakage, thin-film barrier or other functional can inefficacies or be partially damaged as unexpected factor such as pull because of heat-sealing or when using.And for example grant number is disclosed a kind of seven-layer co-extrusion coiling-resistant laminated film in the Chinese patent of CN1156361C, it is made of crystalline resins layer, noncrystalline resin bed and bonding resin layer, and has the balance bridge structure, can overcome to a certain extent curling defective takes place in the coextruded film secondary processing, but this film also has it in the low defective of a side force intensity of applying packed article.In addition, the coextruded film of the more number of plies of present exploitation, the mist degree height of its film, the transparency is low, and additional functional is few.Therefore, the exploitation with good mechanical characteristics, curling resistance and functional abundant and adjustable multi-layer co-extruded packing film will be a technical matters that needs to be resolved hurrily.
The utility model content
The purpose of this utility model is to overcome the defective that exists in the prior art, designs a kind of ten layers of co-extrusion packing film with good mechanical characteristics, coiling-resistant performance and the airing function that blocks water.
Another purpose of the present utility model also is to overcome the defective that exists in the prior art, designs a kind of ten layers of co-extrusion packing film with good mechanical characteristics, coiling-resistant performance and resistance oxygen function.This film also can have additional functions such as the fragrance of obstruct or anti-boiling.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of ten layers of co-extrusion packing film, this film is ten layers of co-extrusion laminar texture, and the bottom of its applying packed article is the air-permeable layer that blocks water, and contains 6 to 9 air-permeable layer that block water in these ten layers of structures, block water and accompany adhesive linkage between air-permeable layer, total number of plies of adhesive linkage and the air-permeable layer that blocks water is 10.This packing film can realize blocking water airing function; Can regulate the air permeable effect that blocks water of film by block water number, thickness and the material of air-permeable layer of adjusting.
In order to improve above-mentioned its curling resistance of film with the airing function that blocks water, optimized technical scheme can be: described each layer of film is symmetrical laying.Here, the symmetrical laying of each layer of film can avoid film to take place to curl after extruding, and promotes the curling resistance of film.
When guaranteeing to have its curling resistance of film of the airing function that blocks water, mechanical characteristics for enhanced film, further preferred scheme can be: the structure expression of described film is: A/A/adh/A/A/A/A/adh/A/A, or A/A/A/adh/A/A/adh/A/A/A, in the formula: from left to right represent each layer that film is laid from top to bottom successively successively, A represents the air-permeable layer that blocks water, and adh represents adhesive linkage.In these two kinds of membrane structures, the side design of pressing close to packed article has continuous two air-permeable layer or three that block water air-permeable layer that blocks water, and makes the mechanical characteristics of film be enhanced.
A kind of ten layers of co-extrusion packing film, this film is ten layers of co-extrusion laminar texture, the bottom of its applying packed article is the air-permeable layer that blocks water, contain 2 to 7 block water air-permeable layer and 1 to 6 oxidation prevention layer in these ten layers of structures, total number of plies of the air-permeable layer that blocks water and oxidation prevention layer is 6 to 8, have at least an oxidation prevention layer to be sandwiched in two and block water between the air-permeable layer, and adjacent oxidation prevention layer and block water and all accompany an adhesive linkage between the air-permeable layer, total number of plies of adhesive linkage, the air-permeable layer that blocks water and oxidation prevention layer is 10.This packing film can be realized resistance oxygen function; The resistance oxygen effect that can regulate film by number, thickness and the material thereof of regulating oxidation prevention layer.
In order to improve above-mentioned its curling resistance of packing film and resistance oxidative stability with resistance oxygen function, preferred scheme can be: the structure expression of described film is: A/A/A/adh/B/B/adh/A/A/A, or A/adh/B/adh/B/B/adh/B/adh/A, or A/A/adh/B/B/B/B/adh/A/A, in the formula: from left to right represent each layer that film is laid from top to bottom successively successively, A represents the air-permeable layer that blocks water, and B represents oxidation prevention layer, and adh represents adhesive linkage.Here, the symmetrical laying of each layer of film can avoid film to take place to curl after extruding, and promotes the curling resistance of film.The characteristics of these three kinds of membrane structures also are: all oxidation prevention layers all are protected because being sandwiched in two air-permeable layer that block water, so oxidation prevention layer is difficult for because the inefficacy of resistance oxygen takes place moisture, so this film has more stable resistance oxygen effect.
For the packing film with resistance oxygen function, under the situation of the asymmetric laying of its each layer of film, crimpiness when extruding in order to overcome film to a certain extent, improve the resistance oxidative stability of packing film simultaneously, optimized technical scheme can also be: A/adh/A/adh/B/adh/B/adh/A/A, or A/adh/A/adh/B/B/B/adh/A/A, in the formula: from left to right represent each layer that film is laid from top to bottom successively successively, A represents the air-permeable layer that blocks water, and B represents oxidation prevention layer, and adh represents adhesive linkage.In these two kinds of membrane structures, except all oxidation prevention layers all are sandwiched in two air-permeable layer that block water and being protected, this film has two air-permeable layer that block water in the side design of pressing close to packed article, the mechanical characteristics of enhanced film is effectively avoided the block water generation of the damaged situation of air-permeable layer of bottom; Otherwise the air-permeable layer breakage that blocks water of bottom, moisture enters oxidation prevention layer on the air-permeable layer that blocks water that is laid on these breakages by inside from the water blocking layer of breakage, and the resistance oxygen effect of oxidation prevention layer can take place to lose efficacy or be partially damaged.Another characteristics of these two kinds of membrane structures are, this film is except having two air-permeable layer that block water in the side design of pressing close to packed article, designed the structure that two air-permeable layer that block water accompany an adhesive linkage in a side that deviates from packed article, two air-permeable layer that block water of this and opposite side have formed a kind of approximate symmetrical structure, have overcome curling that the film stress causes to a certain extent.
For the packing film with resistance oxygen function, under the situation of the asymmetric laying of its each layer of film, for surface toughness and the puncture resistance that increases film, optimized technical scheme can also be: the structure expression of described film is: B/adh/A/adh/B/adh/B/adh/A/A, or B/adh/A/adh/B/B/B/adh/A/A, in the formula: from left to right represent each layer that film is laid from top to bottom successively successively, A represents the air-permeable layer that blocks water, B represents oxidation prevention layer, adh represents adhesive linkage, and wherein the oxidation prevention layer on the top layer of film is the high-tenacity heat-resistant oxidation prevention layer.In these two kinds of membrane structures, this thin film back is designed to a high-tenacity heat-resistant oxidation prevention layer from the top layer of packed article, can increase toughness and the puncture resistance of film effectively, is conducive to satisfy the needs of carrying and transportation.The characteristics of these two kinds of membrane structures also are: most oxidation prevention layers are protected because being sandwiched in two air-permeable layer that block water, and this film is pressing close to two air-permeable layer that block water of packed article one side, so this film has more stable resistance oxygen effect and mechanical characteristics.
For the packing film with resistance oxygen function, in order to give the additional function that packing film intercepts fragrance, further optimized technical scheme can be: describedly be sandwiched in that to have an oxidation prevention layer in two oxidation prevention layers that block water between the air-permeable layer at least be to have the oxidation prevention layer that intercepts the fragrance function concurrently.This oxidation prevention layer that has obstruct fragrance function concurrently also has outstanding fragrance barrier except having resistance oxygen.According to the demand in various degree that intercepts fragrance, can regulate this layer thickness and number.
For the packing film with resistance oxygen function, in order to give the additional function of the anti-boiling of packing film, further optimized technical scheme can also be: its any one deck of described oxidation prevention layer is the high-tenacity heat-resistant oxidation prevention layer, described its any one deck of air-permeable layer that blocks water is the heat-resisting air-permeable layer that blocks water, and its any one deck of described adhesive linkage is heat-resisting adhesive linkage.Here, high-tenacity heat-resistant oxidation prevention layer, heat-resisting air-permeable layer and its resistance to effect of heat of heat-resisting adhesive linkage of blocking water can be realized 121 degrees centigrade of boiling resistances of film all more than 121 degrees centigrade.
Advantage of the present utility model and beneficial effect are: its functional enriching of ten layers of co-extrusion packing film of the utility model, and can adjust flexibly according to client's needs; This film except can realize blocking water ventilative and radical function such as resistance oxygen, also can realize intercepting additional functions such as fragrance or anti-boiling; Aspect the realization of the radical function of film, by symmetry or each layer of near symmetrical film laying, can improve the curling resistance after the extruding of film; By pressing close to the two air-permeable layer that block water of side design of packed article, can improve the mechanical characteristics of film bottom and prevent that the film function from particularly hindering the inefficacy of oxygen function; Accompany the structure of one deck oxidation prevention layer at least by designing two air-permeable layer that block water, can guarantee the resistance oxidative stability of film; Top layer by the design film is the high-tenacity heat-resistant oxidation prevention layer, can improve anti-puncture and the toughness of film.This packing film can be widely used in packaging field, according to functional difference can be widely used in needs resistances oxygen, packing ventilative, that keep the various food of fragrance or boiling blocks water, such as cold fresh meat, fruits and vegetables, milk powder, cooked meat product etc., in addition, it also is applicable to the packing of the medical product that needs sterilization anti-boiling class film, because sterilization process requires film that certain resistance to effect of heat is arranged.
Description of drawings
Fig. 1 is a kind of structural representation of the utility model embodiment 3;
Fig. 2 is a kind of structural representation of the utility model embodiment 5;
Fig. 3 is a kind of structural representation of the utility model embodiment 6;
Fig. 4 is a kind of structural representation of the utility model embodiment 7;
Fig. 5 is a kind of structural representation of the utility model embodiment 8;
Fig. 6 is a kind of structural representation of the utility model embodiment 9.
Among the figure: 1-1 to 1-8, air-permeable layer blocks water; 2-1 to 2-4, adhesive linkage; 3-1 to 3-2, oxidation prevention layer; 4-1 to 4-2, high-tenacity heat-resistant oxidation prevention layer; 5-1, have the oxidation prevention layer that intercepts the fragrance function concurrently; 6-1 to 6-4, the heat-resisting air-permeable layer that blocks water; 7-1 to 7-4, heat-resisting adhesive linkage.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is further described.Following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection domain of the present utility model with this.
Embodiment 1
The utility model is a kind of ten layers of co-extrusion packing film, this film is ten layers of co-extrusion laminar texture, the bottom of its applying packed article is the air-permeable layer that blocks water, contain 6 to 9 air-permeable layer that block water in these ten layers of structures, block water and accompany adhesive linkage between air-permeable layer, total number of plies of adhesive linkage and the air-permeable layer that blocks water is 10.
This packing film can realize blocking water airing function; Can regulate the air permeable effect that blocks water of film by block water number, thickness and the material of air-permeable layer of adjusting.
Embodiment 2
On the basis of embodiment 1, preferred embodiment of the present utility model is: described each layer of film is symmetrical laying.
Here, the symmetrical laying of each layer of film can avoid film to take place to curl after extruding, and promotes the curling resistance of film.
Embodiment 3
On the basis of embodiment 2, preferred embodiment of the present utility model is: the structure expression of described film is: A/A/adh/A/A/A/A/adh/A/A, or A/A/A/adh/A/A/adh/A/A/A, in the formula: from left to right represent each layer that film is laid from top to bottom successively successively, A represents the air-permeable layer that blocks water, and adh represents adhesive linkage.Wherein, membrane structure A/A/A/adh/A/A/adh/A/A/A as shown in Figure 1.
In these two kinds of membrane structures, the side design of pressing close to packed article has continuous two air-permeable layer or three that block water air-permeable layer that blocks water, and makes film when guaranteeing to have its curling resistance of film of the airing function that blocks water, for the mechanical characteristics of enhanced film.
Embodiment 4
The utility model is a kind of ten layers of co-extrusion packing film, this film is ten layers of co-extrusion laminar texture, the bottom of its applying packed article is the air-permeable layer that blocks water, contain 2 to 7 block water air-permeable layer and 1 to 6 oxidation prevention layer in these ten layers of structures, total number of plies of the air-permeable layer that blocks water and oxidation prevention layer is 6 to 8, having at least an oxidation prevention layer to be sandwiched in two blocks water between the air-permeable layer, and adjacent oxidation prevention layer and block water and all accompany an adhesive linkage between the air-permeable layer, total number of plies of adhesive linkage, the air-permeable layer that blocks water and oxidation prevention layer is 10.
This packing film can be realized resistance oxygen function; The resistance oxygen effect that can regulate film by number, thickness and the material thereof of regulating oxidation prevention layer.
Embodiment 5
On the basis of embodiment 4, preferred embodiment of the present utility model is: the structure expression of described film is: A/A/A/adh/B/B/adh/A/A/A, or A/adh/B/adh/B/B/adh/B/adh/A, or A/A/adh/B/B/B/B/adh/A/A, in the formula: from left to right represent each layer that film is laid from top to bottom successively successively, A represents the air-permeable layer that blocks water, and B represents oxidation prevention layer, and adh represents adhesive linkage.Wherein, membrane structure A/A/A/adh/B/B/adh/A/A/A as shown in Figure 2.
Here, the symmetrical laying of each layer of film can avoid film to take place to curl after extruding, and promotes the curling resistance of film.The characteristics of these three kinds of membrane structures also are: all oxidation prevention layers all are protected because being sandwiched in two air-permeable layer that block water, so oxidation prevention layer is difficult for losing efficacy because resistance oxygen takes place moisture.So above-mentioned film also has excellent curling resistance and hinders oxidative stability preferably except having resistance oxygen function.
Embodiment 6
On the basis of embodiment 4, preferred embodiment of the present utility model can also be: A/adh/A/adh/B/adh/B/adh/A/A, or A/adh/A/adh/B/B/B/adh/A/A, in the formula: from left to right represent each layer that film is laid from top to bottom successively successively, A represents the air-permeable layer that blocks water, B represents oxidation prevention layer, and adh represents adhesive linkage.Wherein, membrane structure A/adh/A/adh/B/adh/B/adh/A/A as shown in Figure 3.
In these two kinds of membrane structures, except all oxidation prevention layers all are sandwiched in two air-permeable layer that block water and being protected, this film has two air-permeable layer that block water in the side design of pressing close to packed article, the mechanical characteristics of enhanced film is effectively avoided the block water generation of the damaged situation of air-permeable layer of bottom; Otherwise the air-permeable layer breakage that blocks water of bottom, moisture enters oxidation prevention layer on the air-permeable layer that blocks water that is laid on these breakages by inside from the water blocking layer of breakage, and the resistance oxygen effect of oxidation prevention layer can take place to lose efficacy or be partially damaged.Another characteristics of these two kinds of membrane structures are, this film is except having two air-permeable layer that block water in the side design of pressing close to packed article, designed the structure that two air-permeable layer that block water accompany an adhesive linkage in a side that deviates from packed article, two air-permeable layer that block water of this and opposite side have formed a kind of approximate symmetrical structure, have overcome curling that the film stress causes to a certain extent.Therefore, above-mentioned film except having resistance oxygen function, the crimpiness in the time of also can overcoming film to a certain extent and extrude, and have excellent resistance oxidative stability.
Embodiment 7
On the basis of embodiment 4, preferred embodiment of the present utility model is: B/adh/A/adh/B/adh/B/adh/A/A, or B/adh/A/adh/B/B/B/adh/A/A, in the formula: from left to right represent each layer that film is laid from top to bottom successively successively, A represents the air-permeable layer that blocks water, B represents oxidation prevention layer, and adh represents adhesive linkage, and wherein the oxidation prevention layer on the top layer of film is the high-tenacity heat-resistant oxidation prevention layer.This membrane structure B/adh/A/adh/B/adh/B/adh/A/A as shown in Figure 4.
In these two kinds of membrane structures, this thin film back is designed to a high-tenacity heat-resistant oxidation prevention layer from the top layer of packed article, can increase toughness and the puncture resistance of film effectively, is conducive to satisfy the needs of carrying and transportation.The characteristics of these two kinds of membrane structures also are: most oxidation prevention layers are protected because being sandwiched in two air-permeable layer that block water, and this film is pressing close to two air-permeable layer that block water of packed article one side, so this film has more stable resistance oxygen effect and mechanical characteristics.
Embodiment 8
On the basis of embodiment 7, preferred embodiment of the present utility model is: describedly be sandwiched in that to have an oxidation prevention layer in two oxidation prevention layers that block water between the air-permeable layer at least be to have the oxidation prevention layer that intercepts the fragrance function concurrently.Fig. 5 is the structural representation of this embodiment.
This oxidation prevention layer that has obstruct fragrance function concurrently also has outstanding fragrance barrier except having resistance oxygen.According to the demand in various degree that intercepts fragrance, can regulate this layer thickness and number.
Embodiment 9
On the basis of embodiment 6, preferred embodiment of the present utility model can also be: its any one deck of described oxidation prevention layer is the high-tenacity heat-resistant oxidation prevention layer, described its any one deck of air-permeable layer that blocks water is the heat-resisting air-permeable layer that blocks water, and its any one deck of described adhesive linkage is heat-resisting adhesive linkage.Fig. 6 is the structural representation of this embodiment.
Here, high-tenacity heat-resistant oxidation prevention layer, heat-resisting air-permeable layer and its resistance to effect of heat of heat-resisting adhesive linkage of blocking water can be realized 121 degrees centigrade of boiling resistances of film all more than 121 degrees centigrade.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from 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. ten layers of co-extrusion packing film, it is characterized in that: this film is ten layers of co-extrusion laminar texture, the bottom of its applying packed article is the air-permeable layer that blocks water, contain 6 to 9 air-permeable layer that block water in these ten layers of structures, block water and accompany adhesive linkage between air-permeable layer, total number of plies of adhesive linkage and the air-permeable layer that blocks water is 10.
2. according to claim 1 ten layers of co-extrusion packing film, it is characterized in that: described each layer of film is symmetrical laying.
3. according to claim 2 ten layers of co-extrusion packing film, it is characterized in that: the structure expression of described film is: A/A/adh/A/A/A/A/adh/A/A, or A/A/A/adh/A/A/adh/A/A/A, in the formula: from left to right represent each layer that film is laid from top to bottom successively successively, A represents the air-permeable layer that blocks water, and adh represents adhesive linkage.
4. ten layers of co-extrusion packing film, it is characterized in that: this film is ten layers of co-extrusion laminar texture, the bottom of its applying packed article is the air-permeable layer that blocks water, contain 2 to 7 block water air-permeable layer and 1 to 6 oxidation prevention layer in these ten layers of structures, total number of plies of the air-permeable layer that blocks water and oxidation prevention layer is 6 to 8, having at least an oxidation prevention layer to be sandwiched in two blocks water between the air-permeable layer, and adjacent oxidation prevention layer and block water and all accompany an adhesive linkage between the air-permeable layer, total number of plies of adhesive linkage, the air-permeable layer that blocks water and oxidation prevention layer is 10.
5. according to claim 4 ten layers of co-extrusion packing film, it is characterized in that: the structure expression of described film is: A/A/A/adh/B/B/adh/A/A/A, or A/adh/B/adh/B/B/adh/B/adh/A, or A/A/adh/B/B/B/B/adh/A/A, in the formula: from left to right represent each layer that film is laid from top to bottom successively successively, A represents the air-permeable layer that blocks water, and B represents oxidation prevention layer, and adh represents adhesive linkage.
6. according to claim 4 ten layers of co-extrusion packing film, it is characterized in that: the structure expression of described film is: A/adh/A/adh/B/adh/B/adh/A/A, or A/adh/A/adh/B/B/B/adh/A/A, in the formula: from left to right represent each layer that film is laid from top to bottom successively successively, A represents the air-permeable layer that blocks water, B represents oxidation prevention layer, and adh represents adhesive linkage.
7. according to claim 4 ten layers of co-extrusion packing film, it is characterized in that: the structure expression of described film is: B/adh/A/adh/B/adh/B/adh/A/A, or B/adh/A/adh/B/B/B/adh/A/A, in the formula: from left to right represent each layer that film is laid from top to bottom successively successively, A represents the air-permeable layer that blocks water, B represents oxidation prevention layer, and adh represents adhesive linkage, and wherein the oxidation prevention layer on the top layer of film is the high-tenacity heat-resistant oxidation prevention layer.
8. according to any described ten layers of co-extrusion packing film of claim 4 to 7, it is characterized in that: describedly be sandwiched in that to have an oxidation prevention layer in two oxidation prevention layers that block water between the air-permeable layer at least be to have the oxidation prevention layer that intercepts the fragrance function concurrently.
9. according to any described ten layers of co-extrusion packing film of claim 4 to 7, it is characterized in that: its any one deck of described oxidation prevention layer is the high-tenacity heat-resistant oxidation prevention layer, described its any one deck of air-permeable layer that blocks water is the heat-resisting air-permeable layer that blocks water, and its any one deck of described adhesive linkage is heat-resisting adhesive linkage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220673667 CN203111729U (en) | 2012-12-10 | 2012-12-10 | Ten-layer co-extrusion packaging film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220673667 CN203111729U (en) | 2012-12-10 | 2012-12-10 | Ten-layer co-extrusion packaging film |
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| Publication Number | Publication Date |
|---|---|
| CN203111729U true CN203111729U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220673667 Expired - Lifetime CN203111729U (en) | 2012-12-10 | 2012-12-10 | Ten-layer co-extrusion packaging film |
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| CN (1) | CN203111729U (en) |
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2012
- 2012-12-10 CN CN 201220673667 patent/CN203111729U/en not_active Expired - Lifetime
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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 City, Jiangsu Province Patentee before: JIANGYIN SUNRISE PACKAGING MATERIAL Co.,Ltd. |
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