CN202669107U - Multifunctional film easy to tear - Google Patents
Multifunctional film easy to tear Download PDFInfo
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- CN202669107U CN202669107U CN 201220262129 CN201220262129U CN202669107U CN 202669107 U CN202669107 U CN 202669107U CN 201220262129 CN201220262129 CN 201220262129 CN 201220262129 U CN201220262129 U CN 201220262129U CN 202669107 U CN202669107 U CN 202669107U
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Abstract
Te utility model discloses a multifunctional film easy to tear. The film comprises a main layer, a hot seal layer and adhesion layers, wherein the main layer comprises a plurality of layers of multifunctional layers, the adhesion layers are arranged between the main layer and the hot seal layer and between the multifunctional layers, the hot seal layer comprises polyolefin resin, and the main layer comprises medium density polyethylene and the like. The multifunctional film easy to tear completely uses modified polyolefin resin, adhesion resin and separation materials (ethylene and vinyl alcohol) and adds ethylene-vinyl acetate copolymer (ethylene-vinyl acetate (EVA) resin) of maleic anhydride stem grafting compatilizers. By means of self designed formula and multi-layer coextrusion film blowing process, an agricultural product compound package film which is transparent, can be heated by microwave, can penetrate metal detectors and is high in barrier property, long in maintaining time, convenient and safe and easy to tear off is manufactured. Package materials which are different in release force and can meet application requirements can be designed according to requirements of different customers and transportation, so that various small cups and trays can be packed quickly.
Description
Technical field
The utility model relates to the constituent structure of plastic sheeting, is specifically related to a kind of multi-function membrane that easily tears.
Background technology
According to the traditional idea of people, requirement for packing is firm as much as possible, think that the more firm protection effect to commodity of packing is better, thereby also just more desirable, yet along with the development of society, particularly in recent years, because the arrival of astogeny society, the tight demand to convenient Kaifeng occurred, the former theory of emphasizing to pack protection to commodity unilaterally, sacrificing the Kaifeng property has been subject to great impact; Occurred simultaneously requiring packing, the particularly packing of instant food and so on commodity, should effectively protect the content of its packing, had again the function in convenient Kaifeng.The basic principle of easily tore film is by specific prescription, the fissility intensity appropriateness behind the film thermal involution is descended, to realize effectively protecting the content of packing, the original intention that can conveniently break a seal again; Easily tore film generally adopts multi-layer compound structure, has at least main stor(e)y and hot sealing layer two-layer.The effect of main stor(e)y is to give the higher rigidity of film and higher hot strength, tearing strength, and main stor(e)y has high fusing point usually simultaneously, makes between main stor(e)y and the hot sealing layer, and it is poor to have larger melt temperature, thereby improves the heat sealing processing characteristics of film; Hot sealing layer also claims adhesive layer, and its function mainly is to give the sealing reliability of film and the easy fissility of film, and apparent, choosing of hot sealing layer material for the quality of easy Kaifeng film performance, is vital.In order to obtain the easily tore film of high-quality, the material of hot sealing layer often adopts special-purpose binder or proprietary formula.Film is peeled off rear sealing two kinds of situations, and a kind of is clean noresidue, and a kind of to be that the part has residual on a small quantity, and these two kinds easily to peel off principle similar, raw materials used different.
The mode of easily peeling off that adopts in the world wide now mainly contains two kinds: the one, and easily take off at the interface, namely when sealing with cup, the hot sealing layer of film forms " island phase " structure, film and cup are carried out interfacial separation (following schematic diagram) when peeling off, the 2nd, layering is easily taken off, referred in hot sealing layer, add the not so good filler of compatibility, heat-sealing post heat-seal tunic and the tight involution of cup, but the hot sealing layer of film separates from the centre when external force is peeled off, and has also realized easily taking off.
Easily tore film has the requirement of the following aspects:
One, higher barrier.Because all being some, bean curd, sour milk, jelly, pudding etc. be very easy to corrupt, rotten food, and these food overwhelming majority preserves at normal temperatures, the shelf-life that has requires long, is generally about 3 months to half a year, so the barrier of Easy tearing lid membrane material is just extremely important.Usually the Easy tearing lid film all adopts higher composite construction.
Two, moderate heat sealability.It is firm that the Easy tearing lid film seals in production, accumulating, sales process, and cracky still will not be easy to tear when enabling.Because mainly be children as the consumer objects of the food such as jelly, sour milk, biscuit.Should seal firmly, tear easily again, this is a difficult point of Easy tearing lid film.
Three, sealing will possess good resistance tocrocking and low-temperature heat-sealing.Because the Easy tearing lid film is in packaging process, sealing often can be polluted by can things such as powder and liquid, and simultaneously, along with technological progress, package speed is also in continuous lifting.
Four, film should possess good shrinkage.Combine with cup because the Easy tearing lid film is film, packaged content is after cooling, and volume has certain contraction, if film shrinks accordingly, it is full, smooth, smooth, respond well that packing will seem.
Yet existing easy-to-tear film both had been not easy to tear because rete is thicker, had also wasted a large amount of raw material simultaneously.
The utility model content
The purpose of this utility model is to overcome the defective that exists in the prior art, and a kind of strong packing is provided, and is easy to tear, and saves raw-material multi-functional easy-to-tear film.
For achieving the above object, the technical solution of the utility model is a kind of multi-function membrane that easily tears of design, it is characterized in that, described film comprises main stor(e)y, hot sealing layer and gluing layer, in main stor(e)y, include some one functional layer, between main stor(e)y and hot sealing layer, and be provided with gluing layer between the functional layer.
Wherein preferred technical scheme is that the thickness of described hot sealing layer is 50 microns ~ 250 microns.
Preferred technical scheme also has, and described gluing layer thickness is 10 microns ~ 30 microns.
Preferred technical scheme also has, and described main stor(e)y thickness is 200 microns ~ 600 microns.
Preferred technical scheme also has, and described structure of easily tearing multi-function membrane is the 5-9 layer.
Advantage of the present utility model and beneficial effect are: this easily tears multi-function membrane and adopts modified polyolefin resin fully, binds resin, barrier material (ethylene/vinyl alcohol copolymer), add the ethylene-vinyl acetate copolymer (EVA resin) of maleic anhydride graft compatilizer, by the autonomous Design prescription, adopt multi-layer co-extruded film-blowing process to prepare transparent visual, but heating using microwave, can cross metal detector, the convenient and safe agricultural product composite packing film of easily taking off of high barrier and longer maintenance phase; Can design the packaging material that satisfy the different peeling forces of using according to the needs of different consumers and transportation, can realize the quick packing of various cuvettes, little tray.
Easily tore film is by specific prescription, the fissility intensity appropriateness behind the film thermal involution descended, to realize effectively protecting the content of packing, the original intention that can conveniently break a seal again; Easily tore film generally adopts multi-layer compound structure, has at least main stor(e)y and hot sealing layer two-layer.The effect of main stor(e)y is to give the higher rigidity of film and higher hot strength, tearing strength; Hot sealing layer mainly is to give the sealing reliability of film and the easy fissility of film, and choosing of hot sealing layer material for the quality of easy Kaifeng film performance, is vital.In order to obtain the easily tore film of high-quality, the material of hot sealing layer often adopts special-purpose binder or proprietary formula.Easily the Kaifeng film should have wider heat sealing temperature range, and within this temperature range, sealing strength is within more satisfactory heat-seal strength scope (between 5N/15mm～12N/15mm); This multi-layer co-extruded easily tore film has higher ductility simultaneously, and when the full filling and packing of 200g, this material can satisfy the not requirement of leak rate 99%; Guaranteeing has enough aluminium lamination adhesive force.
Description of drawings
Fig. 1 is that the utility model easily tears 5 layers of structural representation in the multi-function membrane;
Fig. 2 is that the utility model easily tears 7 layers of structural representation in the multi-function membrane;
Fig. 3 is that the utility model easily tears 9 layers of structural representation in the multi-function membrane.
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.
The utility model is a kind of multi-function membrane that easily tears, and this film comprises main stor(e)y, hot sealing layer and gluing layer, includes some one functional layer in main stor(e)y, between main stor(e)y and hot sealing layer, and is provided with gluing layer between the functional layer.
In the utility model, described hot sealing layer (PO) comprises vistanex, and its thickness is 50 microns ~ 250 microns, its molecular weight 50,000 ~ 200,000, melt index 0.3 ~ 10 g/10min.PO has advantageously realized needed steam screen layer, and can affect the sealability of internal layer, namely may can realize high heat-sealing strength under the heat-sealing temperature minimum.Described hot sealing layer comprises low density polyethylene (LDPE), medium density polyethylene, any one or its any mixture in the Ionomer of high density polyethylene (HDPE), LLDPE, metallocene PE, polypropylene, vinylacetate-ethylene copolymer, methacrylic acid-ethylene copolymer, ethylene-butyl acrylate copolymer, acid modification, described polyolefinic fusing point is 85 ~ 96 ℃.The shared weight percent content of medium density polyethylene is 5 wt% ~ 35 wt% in described hot sealing layer.The weight content of medium density polyethylene can also be 1wt% ~ 50 wt%, more preferably 10 wt% ~ 20 wt%.
Preferred embodiment also has in the utility model, describedly comprises a kind of by in ethylene-vinyl alcohol copolymer or the polyamide of one deck at least, or its mixture, and its thickness is 10 microns ~ 30 microns.Weight percent content at described middle ethene is 20% ~ 38%.
Preferred embodiment also has in the utility model, described main stor(e)y comprises medium density polyethylene, any one or its any mixture in the Ionomer of high density polyethylene (HDPE), LLDPE, metallocene PE, polypropylene, vinylacetate-ethylene copolymer, methacrylic acid-ethylene copolymer, acid modification, its thickness is 200 microns ~ 600 microns, and the fusing point of described main stor(e)y is 85 ℃ ~ 125 ℃.This top layer has the advantages that wearability is good, smooth, processability is good.
Preferred embodiment also has in the utility model, and described gluing layer (Tie) comprises vinylacetate-ethylene copolymer or maleic anhydride modified ethene polymers, and the density of described vinylacetate-ethylene copolymer is 0.93 ~ 0.94g/cm
3, the shared weight percentage of vinylacetate-ethylene copolymer is 5% ~ 25% in described multi-layer co-extruded heat-shrinkable film.
Preferred embodiment also has in the utility model, and described structure of easily tearing multi-function membrane is the 5-9 layer.Five-layer structure wherein, that is, each layer material is from top to bottom: PO/Tie/EVOH/Tie/PO, or seven-layer structure, that is, each layer material is PO/Tie/PA/EVOH/PA/Tie/PO from top to bottom, or nine layers of structure, that is, each layer material is PET/Tie/PO/Tie/PA/EVOH/PA/Tie/PO from top to bottom.
Preferred embodiment also has in the utility model, is added with at least a in slipping agent, antitack agent, antistatic additive and the color masterbatch in described hot sealing layer and main stor(e)y.
Embodiment 1
Structure is the five-layer co-squeezing heat-shrinkable film as shown in Figure 1, this easily tears multi-function membrane by two-layer vistanex (A and E), one deck ethylene-vinyl alcohol copolymer (C) consists of with two-layer binding material (B and D), the thickness of wherein said hot sealing layer is 50 microns, adhesive layer thickness is 10 microns, and main stor(e)y thickness is 200 microns.The thickness proportion of each layer is A: B: C: D: E=30%: 15%: 10%: 15%: 30%, the line easy-tear performance of this structural membrane was good, and had and hinder preferably oxygen and the wet ability of resistance.
Ground floor A is by the mixture (weight content scope be 0% ~ 60%) of extruder with primary raw material resin ethylene-alpha-olefin copolymer or multiple ethylene-alpha-olefin copolymer, and wherein the alhpa olefin weight content is 1% ~ 20%; Ethene and EMAA[are ethene-(methyl) acrylic acid zinc salt, sodium salt, lithium salts plasma key condensate], EVA(ethene and acetate copolymer), EBA(butyl acrylate and ethylene copolymer) copolymer, wherein carboxylic acid monomer's weight content is 5% ~ 25%, in extruder front end mixed-hopper behind the uniform stirring, under 160 ~ 280 ℃, with resin plasticizing, clamp-on in the runner of ground floor A of mould;
Second layer B by same extruder, under 160 ~ 280 ℃, with jointing material resin plasticizing, clamp-ons in the runner of second layer B of mould;
The 3rd layer of C respectively by same extruder, under 160 ~ 280 ℃, with EVOH resin plasticizing, clamp-ons in the runner of the 3rd layer of C of mould;
The 4th layer of D by same extruder, under 160 ~ 280 ℃, with jointing material resin plasticizing, clamp-ons in the runner of the 4th layer of D of mould;
Layer 5 E,, under 160 ~ 280 ℃, with the resin plasticizing, is clamp-oned in the runner of five layers of E of mould in extruder front end mixed-hopper behind the uniform stirring primary raw material resin PO and additive by same extruder.
Embodiment 2
Structure is the five-layer co-squeezing heat-shrinkable film as shown in Figure 2, this easily tears multi-function membrane by two-layer vistanex (A and G), two-layer PA(C and E), one deck ethylene-vinyl alcohol copolymer (D) and two-layer binding material (B and F) consist of, the thickness of wherein said hot sealing layer is 150 microns, adhesive layer thickness is 15 microns, and main stor(e)y thickness is 400 microns.The thickness proportion of each layer is A: B: C: D: E: F: G=27%: 15%: 8%: 8%: 8%: 15%: 17%.The line easy-tear performance of this structural membrane is good, and has good oxygen and steam barrier, and high shrinkage factor can be used for the fresh-keeping shrink wrapping of cold fresh meat and cheese.
The A of the superiors is by the mixture (weight content scope be 0% ~ 60%) of extruder with primary raw material resin ethylene-alpha-olefin copolymer or multiple ethylene-alpha-olefin copolymer, and wherein the alhpa olefin weight content is 1% ~ 20%; The copolymer of ethene and EMAA, EVA, EBA, wherein carboxylic acid monomer's weight content is 5% ~ 25%, in extruder front end mixed-hopper behind the uniform stirring, under 160 ~ 280 ℃, with the resin plasticizing, clamp-ons in the runner of the A of the superiors of mould;
Second layer B by same extruder, under 160 ~ 280 ℃, with jointing material resin plasticizing, clamp-ons in the runner of second layer B of mould;
The 3rd layer of C and layer 5 E respectively by same extruder, in extruder front end mixed-hopper behind the uniform stirring, under 220 ~ 280 ℃, with the resin plasticizing, clamp-on primary raw material resin PA and additive in the runner of the 3rd layer of C of mould and layer 5 E;
The 4th layer of D respectively by same extruder, under 160 ~ 280 ℃, with EVOH resin plasticizing, clamp-ons in the runner of the 4th layer of D of mould;
Layer 6 F by same extruder, under 160 ~ 280 ℃, with jointing material resin plasticizing, clamp-ons in the runner of layer 6 F of mould;
Layer 7 G,, under 160 ~ 280 ℃, with the resin plasticizing, is clamp-oned in the runner of seven layers of G of mould in extruder front end mixed-hopper behind the uniform stirring main vistanex PO and additive by same extruder.
Embodiment 3
Structure is the five-layer co-squeezing heat-shrinkable film as shown in Figure 3, this easily tears multi-function membrane by outer ethylene diester (PET (A)) two-layer vistanex (C and I), two-layer PA(E and G), one deck ethylene-vinyl alcohol copolymer (F) and three layers of binding material (B, D and H) consist of, the thickness of wherein said hot sealing layer is 250 microns, cohering thickness is 30 microns, and main stor(e)y thickness is 600 microns.The line easy-tear performance of this structural membrane is good, has good oxygen and steam barrier, high shrinkage factor, and the surface is undertaken the printing of effective, can be used for the fresh-keeping shrink wrapping of cold fresh meat and cheese.
The A of the superiors,, under 160 ~ 280 ℃, with the resin plasticizing, is clamp-oned in the runner of the A of the superiors of mould in extruder front end mixed-hopper behind the uniform stirring primary raw material resin PET and additive by extruder;
Second layer B by same extruder, under 160 ~ 280 ℃, with jointing material resin plasticizing, clamp-ons in the runner of second layer B of mould;
The 3rd layer of C is by the mixture (weight content scope be 0% ~ 60%) of same extruder with primary raw material resin ethylene-alpha-olefin copolymer or multiple ethylene-alpha-olefin copolymer, and wherein the alhpa olefin weight content is 1% ~ 20%; The copolymer of ethene and EMAA, EVA, EBA, wherein carboxylic acid monomer's weight content is 5% ~ 25%, in extruder front end mixed-hopper behind the uniform stirring, under 160 ~ 280 ℃, the resin plasticizing is clamp-oned in the runner of three layers of C of mould;
The 4th layer of D by same extruder, under 160 ~ 280 ℃, with jointing material resin plasticizing, clamp-ons in the runner of the 4th layer of D of mould;
Layer 5 E and layer 7 G respectively by same extruder, in extruder front end mixed-hopper behind the uniform stirring, under 220 ~ 280 ℃, with the resin plasticizing, clamp-on primary raw material resin PA and additive in the runner of the layer 5 E of mould and layer 7 G;
Layer 6 F respectively by same extruder, under 160 ~ 280 ℃, with EVOH resin plasticizing, clamp-ons in the runner of layer 6 F of mould;
The 8th layer of H by same extruder, under 160 ~ 280 ℃, with jointing material resin plasticizing, clamp-ons in the runner of the 8th layer of H of mould;
The 9th layer of I,, under 160 ~ 280 ℃, with the resin plasticizing, clamp-oned in the runner of nine layers of I of mould in extruder front end mixed-hopper behind the uniform stirring primary raw material resin PO and additive by same extruder.
According to the different requirements of product, can carry out sided corona treatment with suitable power with film through corona treatment plant, make film reach suitable moistened surface tension force.
The hot water shrinkage of the multi-layer co-extruded heat-shrinkable film of the above high-barrier, vertical in 80 ℃ of water/horizontal＞20 ~ 50%, its hot strength 〉=28pa, elongation at break 〉=500, light transmittance＞88, OTR oxygen transmission rate≤20cm
3/ m
224H0.1mpa, rate of perviousness≤4 g/m
224H.
The above only is preferred embodiment 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 (5)
1. one kind is easily torn multi-function membrane, it is characterized in that, described film comprises main stor(e)y, hot sealing layer and gluing layer, includes some one functional layer in main stor(e)y, between main stor(e)y and hot sealing layer, and is provided with gluing layer between the functional layer.
2. the multi-function membrane that easily tears as claimed in claim 1 is characterized in that, the thickness of described hot sealing layer is 50 microns ~ 250 microns.
3. the multi-function membrane that easily tears as claimed in claim 1 is characterized in that, described gluing layer thickness is 10 microns ~ 30 microns.
4. the multi-function membrane that easily tears as claimed in claim 1 is characterized in that, described main stor(e)y thickness is 200 microns ~ 600 microns.
5. the multi-function membrane that easily tears as claimed in claim 1 is characterized in that, described structure of easily tearing multi-function membrane is the 5-9 layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220262129 CN202669107U (en) | 2012-06-05 | 2012-06-05 | Multifunctional film easy to tear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220262129 CN202669107U (en) | 2012-06-05 | 2012-06-05 | Multifunctional film easy to tear |
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| CN202669107U true CN202669107U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220262129 Expired - Fee Related CN202669107U (en) | 2012-06-05 | 2012-06-05 | Multifunctional film easy to tear |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085159A (en) * | 2014-06-30 | 2014-10-08 | 海宁市产品质量监督检验所 | One-way linear easily-torn composite membrane |
| CN104786527A (en) * | 2015-03-29 | 2015-07-22 | 安徽松泰包装材料有限公司 | Preparation technology of spiral film for corn flake package |
| CN107891643A (en) * | 2017-10-25 | 2018-04-10 | 无锡市太平洋新材料股份有限公司 | A kind of easily tore film for packaging for foodstuff |
| CN108263062A (en) * | 2018-03-15 | 2018-07-10 | 南通环球塑料工程有限公司 | A kind of multilayer shrinks antifog epiphragma and preparation method thereof |
| CN109624457A (en) * | 2019-01-09 | 2019-04-16 | 江阴宝柏包装有限公司 | One kind easily tears composite sheet and easily tears composite soft tube |
| JP2021041563A (en) * | 2019-09-09 | 2021-03-18 | 東レフィルム加工株式会社 | Easily openable composite film and lid material using the same |
| JP2021062508A (en) * | 2019-10-11 | 2021-04-22 | 東レフィルム加工株式会社 | Easy-to-open composite film and method for producing the same, and easy-to-open lid material for paper container using the same |
-
2012
- 2012-06-05 CN CN 201220262129 patent/CN202669107U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085159A (en) * | 2014-06-30 | 2014-10-08 | 海宁市产品质量监督检验所 | One-way linear easily-torn composite membrane |
| CN104786527A (en) * | 2015-03-29 | 2015-07-22 | 安徽松泰包装材料有限公司 | Preparation technology of spiral film for corn flake package |
| CN107891643A (en) * | 2017-10-25 | 2018-04-10 | 无锡市太平洋新材料股份有限公司 | A kind of easily tore film for packaging for foodstuff |
| CN108263062A (en) * | 2018-03-15 | 2018-07-10 | 南通环球塑料工程有限公司 | A kind of multilayer shrinks antifog epiphragma and preparation method thereof |
| CN109624457A (en) * | 2019-01-09 | 2019-04-16 | 江阴宝柏包装有限公司 | One kind easily tears composite sheet and easily tears composite soft tube |
| JP2021041563A (en) * | 2019-09-09 | 2021-03-18 | 東レフィルム加工株式会社 | Easily openable composite film and lid material using the same |
| JP2021062508A (en) * | 2019-10-11 | 2021-04-22 | 東レフィルム加工株式会社 | Easy-to-open composite film and method for producing the same, and easy-to-open lid material for paper container using the same |
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| 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: 20130116 Termination date: 20180605 |
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| CF01 | Termination of patent right due to non-payment of annual fee |