CN104924712B - Self-supporting bag and composite film thereof - Google Patents
Self-supporting bag and composite film thereof Download PDFInfo
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- CN104924712B CN104924712B CN201510424966.2A CN201510424966A CN104924712B CN 104924712 B CN104924712 B CN 104924712B CN 201510424966 A CN201510424966 A CN 201510424966A CN 104924712 B CN104924712 B CN 104924712B
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- density polyethylene
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- 239000002131 composite material Substances 0.000 title claims abstract description 44
- 239000004698 Polyethylene Substances 0.000 claims abstract description 61
- 229920000573 polyethylene Polymers 0.000 claims abstract description 58
- 238000007789 sealing Methods 0.000 claims abstract description 52
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 35
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 35
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- -1 polyethylene Polymers 0.000 claims abstract description 20
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 18
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 18
- 229920000728 polyester Polymers 0.000 claims description 15
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 239000004411 aluminium Substances 0.000 claims description 9
- 239000012752 auxiliary agent Substances 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 6
- 229920001526 metallocene linear low density polyethylene Polymers 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 2
- 239000005977 Ethylene Substances 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 229920000092 linear low density polyethylene Polymers 0.000 abstract description 15
- 239000004707 linear low-density polyethylene Substances 0.000 abstract description 15
- 230000006978 adaptation Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 abstract 7
- 239000012793 heat-sealing layer Substances 0.000 abstract 3
- 230000008018 melting Effects 0.000 abstract 3
- 238000002844 melting Methods 0.000 abstract 3
- 239000004712 Metallocene polyethylene (PE-MC) Substances 0.000 abstract 1
- 239000002981 blocking agent Substances 0.000 abstract 1
- 229920013716 polyethylene resin Polymers 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 239000010408 film Substances 0.000 description 58
- 239000011347 resin Substances 0.000 description 12
- 229920005989 resin Polymers 0.000 description 12
- 239000002994 raw material Substances 0.000 description 10
- 229920000915 polyvinyl chloride Polymers 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 239000010409 thin film Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000004806 packaging method and process Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000003851 corona treatment Methods 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 229920006266 Vinyl film Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical group CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
The invention discloses a polyethylene film. The polyethylene film comprises a composite layer, a middle layer and a heat sealing layer which are sequentially overlapped. The composite layer comprises 60-70wt% of metallocene polyethylene and 30-40wt% of low-density polyethylene; the middle layer comprises 30-35wt% of high-density polyethylene, 30-35wt% of linear low-density polyethylene and 30-35wt% of low-density polyethylene; the heat sealing layer comprises 33-35% of low-density polyethylene, 63-65% of reinforcing polyethylene resin, 0.5-0.8wt% of slipping agent and 1.3-2.0wt% of anti-blocking agent. A melting point of the composite layer is higher than that of the middle layer, and the melting point of the middle layer is higher than that of the heat sealing layer. The invention further provides a composite film and a self-supporting bag which are prepared through the polyethylene film. By the adoption of the PE film, PE melting of the heat sealing portion can be effectively avoided, the heat sealing performance of the PE film is greatly improved, and the polyethylene film has excellent adaptation, pressure resistance and falling resistance and meets the requirement of actual production.
Description
Technical field
The present invention relates to consumable products packaging field, more particularly to a kind of polyethylene film, band tip Self stand bag THIN COMPOSITE
Film and the Self stand bag product with tip.
Background technology
In recent years, the food service industry that disappears soon just gradually emerges, and its demand increasingly increases, and increasing consumer is for fast
The functional package of fast consumer goodss requires also more and more higher.The one kind of Self stand bag as numerous packaging bags that disappear soon, due to its pouch-shaped
Uniqueness, is well received by consumers always, and answering for Self stand bag Product Process can all be complained by the same time many flexible package producers
It is miscellaneous.
Relative to other packaging products, Self stand bag is made up of spout, bag two parts, and its making mainly has printing, answers
Conjunction, bag, four road technique of boiling hot suction nozzle.Especially in boiling hot suction nozzle technique, often there is heat-seal land as heat-sealing temperature is too high
Or pressure is excessive, overlong time causes " PE is melted out " phenomenon so that local produces and substantially purses up.If heat-sealing temperature is not enough or pressure
It is too small, heat-sealing portion sealing can be caused bad again, heat seal strength defect not up to standard, once packing material occurs in transportation
Breakage, or even FCL food can be affected to sell, cause huge economic losses.
For different product content things and different packaging class, currently marketed Self stand bag is tied with laminated film
Structure typically has PET/PE, PET/AL/PE, PET/AL/NY/PE etc., and in bag technique, composite film material needs to carry out heat
Envelope, therefore the internal layer of existing laminated film generally adopts polyethylene (PE) film, such as using the structure of nylon (NY)/PE.It is existing poly-
Vinyl film is limited by material, easily occurs dead wrinkle phenomenon after heat-sealing, thus causes Self stand bag using not pressure, leakiness after a period of time
, after falling, easily there is bale broken in liquid.
The content of the invention
In consideration of it, the present invention provides a kind of polyethylene film, the thin film has good heat sealability, solves existing heat
Easily there is the problem of " PE is melted out " in envelope position, which thereby enhances the pressure performance and drop impact resistance energy of Self stand bag prepared therefrom.
The technical solution adopted for the present invention to solve the technical problems is：A kind of polyethylene film, which includes successively：It is compound
Layer, intermediate layer and hot sealing layer.The thickness ratio of above-mentioned composite bed, intermediate layer and hot sealing layer is 1:1.5～3:1.
The composite bed includes：The low-density of the metallocene PE and 30wt%～40wt% of 60wt%～70wt% is gathered
Ethylene.Wherein, the trade mark of metallocene PE (m-LLDPE) is Tao Shi 5100G, and its physical parameter is as follows：Melt index
0.85g/10min, density 0.920g/cm3, 105 DEG C of Vicat softening point, 124 DEG C of fusing point.The trade mark of Low Density Polyethylene (LDPE)
For Exxon Mobil 150BW, its physical parameter is as follows：Melt index 0.75g/10min, density 0.923g/cm3, dimension card softening
95 DEG C of point, 109 DEG C of fusing point.
The intermediate layer includes：The high density polyethylene (HDPE) of 30wt%～35wt%, the line style of 30wt%～35wt% are low close
The Low Density Polyethylene of degree polyethylene and 30wt%～35wt%.Wherein, the trade mark of high density polyethylene (HDPE) (HDPE) is Exxon
Mobil HTA108, its physical parameter are as follows：Melt index 0.7g/10min, density 0.961g/cm3, 129 DEG C of Vicat softening point,
135 DEG C of fusing point.The trade mark of linear low density polyethylene (LLDPE) (LLDPE) is Tao Shi 2045G, and its physical parameter is as follows：Melt index
1.0g/10min, density 0.922g/cm3, 104 DEG C of Vicat softening point, 122 DEG C of fusing point.The trade mark of Low Density Polyethylene with it is above-mentioned
In composite bed, the trade mark of Low Density Polyethylene is identical.Preferably, fluoride of the intermediate layer also including 0.2wt%～0.3wt%
Auxiliary agent.The trade mark of the fluoride auxiliary agent is peace color matching 100991-K, and its active constituent content is 5%.
The hot sealing layer includes：The Low Density Polyethylene of 33wt%～35wt%, the poly- second of the enhancing of 63wt%～65wt%
The opening agent of olefine resin, the slipping agent of 0.5wt%～0.8wt% and 1.3wt%～2.0wt%.Wherein, Low Density Polyethylene
The trade mark is ibid.The trade mark for strengthening polyvinyl resin is Tao Shi 5500G, and its physical parameter is as follows：Melt index 1.5g/10min, it is close
Degree 0.914g/cm3.The trade mark of slipping agent is peace color matching 10090-K, and effective ingredient is erucyl amide, and active constituent content is
5.0%.The trade mark of opening agent is Beijing Aaron intelligence connection AB-20LD, and effective ingredient is silicon dioxide, and active constituent content is
20%.
Present invention also offers a kind of preparation method of polyethylene film, which is by above-mentioned composite bed, intermediate layer and hot sealing layer
Resin raw material coextrusion blow molding at 120 DEG C～160 DEG C.
Present invention also offers a kind of Self stand bag laminated film, which includes successively：Polyester layer, polyester aluminium coated and above-mentioned
Film layer.Wherein, polyester aluminium coated can ensure the high density and deflection of Self stand bag.The preparation side of above-mentioned laminated film
Method is as follows：Sided corona treatment is carried out to the composite bed of polyethylene film；Using dry type composite algorithm, using adhesive successively by polyester
Layer, polyester aluminium coated, film layer are combined.
Present invention also offers a kind of Self stand bag, its bag prepared by above-mentioned laminated film, and connect with bag heat-sealing
The spout two parts composition for connecing.
The present invention is had the advantage that compared with prior art：
1st, the polyethylene film (PE films) that the present invention is provided, the thin film include composite bed, intermediate layer and hot sealing layer successively.Its
In, composite bed includes：The Low Density Polyethylene of the metallocene PE and 30wt%～40wt% of 60wt%～70wt%；It is middle
Layer includes：The high density polyethylene (HDPE) of 30wt%～35wt%, the linear low density polyethylene (LLDPE) of 30wt%～35wt%, 30wt%～
The fluoride auxiliary agent of the Low Density Polyethylene and 0.2wt%～0.3wt% of 35wt%；Hot sealing layer includes：33wt%～35wt%
Low Density Polyethylene, 63wt%～65wt% strengthen polyvinyl resin, the slipping agent of 0.5wt%～0.8wt% and
The opening agent of 1.3wt%～2.0wt%.Composite bed is used for the good combined strength bination for ensureing PE films and other thin film, intermediate layer
For ensure its with composite bed, hot sealing layer with compared with high bond strength, hot sealing layer has higher closely sealed after being used to make the heat-sealing of PE films
Property and heat seal strength.The purpose of said components be cause PE films on each layer fusing point from composite bed to hot sealing layer direction in gradient
Gradually lower, melted after hot sealing layer reaches heat-sealing temperature first during heat-sealing, and the intermediate layer in outside, composite bed not up to phase
Fusing point is answered, so as to be prevented effectively from the generation of " PE is melted out ".Therefore, the PE films for being provided using the present invention, with excellent heat sealability
Can, while material has good sealing after ensureing heat-sealing.
2nd, the laminated film that the present invention is provided, the laminated film include polyester layer, polyester aluminium coated and above-mentioned PE layers successively.
Polyester layer has preferable printing adaptability and dimensional stability, and polyester aluminium coated has good barrier, and food is effectively ensured
The shelf-life of product, while its high density performance imparts the excellent tear resistance of the Self stand bag prepared by the laminated film and very
Good deflection.PE layers are then used for ensureing that laminated film has excellent heat sealability that adaptation to be high after heat-sealing, and then ensure compound
The anti-leakage and drop impact resistance of thin film.Therefore, the laminated film that the present invention is provided has preferable mechanical property, heat-sealing adaptation
And heat seal strength, the product that help digestion soon are packed using the laminated film of present invention offer, guaranteeing the quality for product can be further ensured that
Phase, while so that product not easy-to-leak liquid after packaging, is clashed into and be not susceptible to bale broken after staggering along, while avoiding hot blast position
" PE is melted out " and " dead wrinkle " phenomenon, greatly improve product quality.
Specific embodiment
For a further understanding of the present invention, below in conjunction with specific embodiment, the present invention is described in detail.
The embodiment of the invention discloses a kind of polyethylene film, which includes successively：Composite bed, intermediate layer and hot sealing layer.
Wherein, composite bed includes：The metallocene PE (m-LLDPE) of 60wt%～70wt% and 30wt%～40wt%
Low Density Polyethylene (LDPE).Intermediate layer includes：The high density polyethylene (HDPE) (HDPE) of 30wt%～35wt%, 30wt%～
The linear low density polyethylene (LLDPE) (LLDPE) of 35wt%, the Low Density Polyethylene (LDPE) of 30wt%～35wt% and 0.2wt%～
The fluoride auxiliary agent of 0.3wt%.Hot sealing layer includes：The Low Density Polyethylene (LDPE) of 33wt%～35wt%, 63wt%～
The opening agent for strengthening polyvinyl resin, the slipping agent of 0.5wt%～0.8wt% and 1.3wt%～2.0wt% of 65wt%.On
The thickness ratio for stating composite bed, intermediate layer and hot sealing layer is 1:1.5～3:1.
Due to the limited strength of polyethylene film, therefore also need under normal circumstances which is combined with other films.It is above-mentioned
Composite bed is that PE films carry out compound one layer with other films, and wherein m-LLDPE has excellent antifouling property, and which preferably adopts
The 5100G of Dow Chemical's production.LDPE has excellent processing characteristics, and which is preferably using Exxon Mobil Corporation's production
150BW。
Intermediate layer is the articulamentum of composite bed and hot sealing layer, and which has the fusing point less than composite bed.Wherein HDPE has pole
Good impact resistance and stability, can improve the pressure and impact resistance of product, and which is preferably given birth to using Exxon Mobil Corporation
The HTA108 of product.LLDPE has higher percentage elongation, can improve the tensile strength of PE films, and which preferably adopts Dow Chemical
The 2045G of production.Fluoride auxiliary agent is preferably using the 100991-K of peace color matching company production.LDPE in intermediate layer is it is also preferred that adopt
The 150BW produced with Exxon Mobil Corporation.
Hot sealing layer is a layer for directly contacting with pack content, and which has the fusing point less than intermediate layer.Wherein strengthen poly-
Vinyl has the advantages that easy processing, heat-sealing temperature be low, lear energy is strong, and which is preferably using Dow Chemical's production
5500G.LDPE in hot sealing layer is it is also preferred that the 150BW produced using Exxon Mobil Corporation.Slipping agent preferably pacifies color matching company
The 10090-K of production.The AB-20LD of the preferred Beijing Aaron Zhi Lian companies production of opening agent.
Accordingly, present invention also offers a kind of preparation method of above-mentioned PE films, which is by above-mentioned composite bed, intermediate layer and heat
The coextrusion blow molding at 120 DEG C～160 DEG C of the resin raw material of sealing.
Composite bed resin, intermediate layer resin and hot sealing layer resin are preferably separately added into the present invention three barrels of extruder
In, and three sections of heating are carried out to each barrel, and one section of heating-up temperature of each barrel is preferably provided with for 120 DEG C～130 DEG C, two-stage nitration heating is warm
Spend for 130 DEG C～140 DEG C, three sections of heating-up temperatures are 140 DEG C～150 DEG C, it is 140 DEG C～160 DEG C to arrange die head temperature, and control is squeezed
Go out melt pressure less than 45Mpa.Polymer particle in above three barrel melts and is formed pipe through extruder, by pipe
Compressed air is gone out from extruder die head center after stretching, pipe is blown into into blister film, while blister film Jing vanes are cooled down
Air cooling sizing is obtained PE films successively including composite bed, intermediate layer and hot sealing layer.
Using above-mentioned technical proposal so that the three-decker of PE films with from composite bed to hot sealing layer direction it is stepped by
Three fusing points for gradually reducing, melt after hot sealing layer reaches heat-sealing temperature first during heat-sealing, and the intermediate layer in outside, composite bed are simultaneously
Not up to corresponding fusing point, so as to be prevented effectively from the generation of " PE is melted out ".
Present invention also offers a kind of Self stand bag laminated film by above-mentioned PE film preparations, which includes successively：Polyester layer
(PET), polyester aluminium coated (VMPET) and above-mentioned PE layers.VMPET is contacted with the composite bed of PE films.Wherein, polyester aluminium coated
With good barrier, while can ensure the high density and deflection of Self stand bag is obtained.
Accordingly, the preparation method of above-mentioned laminated film is as follows：Sided corona treatment is carried out to the composite bed of polyethylene film, is made
The wetting tension for obtaining this layer reaches more than 40 dynes, can make PE films and other films by the way of one side corona or two-sided corona
Conjugation (i.e. peel strength) more preferably；PET, VMPET, PE are carried out dry type successively to be combined, it is compound in make the composite bed of PE with
VMPET is relative, and required laminated film is just obtained after being combined.
Finally, present invention also offers a kind of Self stand bag, its bag prepared by above-mentioned laminated film, and with bag heat
Spout two parts composition of envelope connection.Its manufacturing process is identical with processing method well known in the art, will not be described here.
In following examples, m-LLDPE is the 5100G of Dow Chemical's production, and it is public that LDPE is Exxon Mobil
The 150BW of department's production.HDPE is the HTA108 of Exxon Mobil Corporation's production, and LLDPE is Dow Chemical's production
2045G, fluoride auxiliary agent are the 100991-K of peace color matching company production.Strengthen polyvinyl resin and be Dow Chemical's life
The 5500G of product.Slipping agent is the 10090-K of peace color matching company production.Opening agent is the production of Beijing Aaron Zhi Lian companies
AB-20LD。
Embodiment 1, prepares PE films.
Composite bed resin raw material, intermediate layer resin raw material and hot sealing layer are separately added into being coextruded in three barrels of machine
Resin raw material, each resin raw material formula are as follows：
Composite bed：The LDPE of the m-LLDPE and 30wt% of 70wt%.
Intermediate layer：The fluoride of the LDPE and 0.3wt% of LLDPE, 34.7wt% of HDPE, 30wt% of 35wt% is helped
Agent.
Hot sealing layer：LDPE, 65wt%'s of 33wt% strengthens polyvinyl resin, the slipping agent of 0.7wt% and 1.3wt%
Opening agent.
Polymer particle in above three barrel melts and is formed pipe through extruder, from extrusion after pipe is stretched
Compressed air is gone out at machine die head center, and pipe is blown into blister film, while the cooling air cooling sizing of blister film Jing vanes is made
Obtain PE thin film.
Embodiment 2, prepares PE films.
Each resin raw material formula is as follows：Composite bed：The LDPE of the m-LLDPE and 40wt% of 60wt%.
Intermediate layer：The fluoride of the LDPE and 0.2wt% of LLDPE, 35wt% of HDPE, 34.8wt% of 30wt% is helped
Agent.
Hot sealing layer：LDPE, 63wt%'s of 34.2wt% strengthens polyvinyl resin, the slipping agent of 0.8wt% and 2.0wt%
Opening agent.Remaining is with embodiment 1.
Embodiment 3, prepares PE films.
Each resin raw material formula is as follows：Composite bed：The LDPE of the m-LLDPE and 33.3wt% of 66.7wt%.
Intermediate layer：The fluorine of the LDPE and 0.28wt% of LLDPE, 33.24wt% of HDPE, 33.24wt% of 33.24wt%
Compound auxiliary agent.
Hot sealing layer：LDPE, 64.85wt% of 32.43wt% strengthen polyvinyl resin, the slipping agent of 0.78wt% and
The opening agent of 1.94wt%.Remaining is with embodiment 1.
PE films obtained in embodiment 1～3 are carried out into heat sealability and Mechanics Performance Testing, test result refers to table 1.
Embodiment 4, prepares Self stand bag
First, the PE films composite bed of embodiment 1 is carried out into sided corona treatment.Then, successively PET, VMPET, PE are done
Formula is combined, and makes the composite bed of PE relative with VMPET in being combined, and required laminated film is just obtained after being combined.Then, this is combined
Thin film makes the bag of Self stand bag.Finally, spout is sealed with bag, Self stand bag is obtained, observed heat-seal land；Then fill
Dress 500g water, carries out fall-down test and pressure test, and its test result refers to table 2.
Embodiment 5, prepares Self stand bag
From raw material for embodiment 2 PE films, remaining is with embodiment 4.
Embodiment 6, prepares Self stand bag
From raw material for embodiment 3 PE films, remaining is with embodiment 4.
Shown in the above is only the preferred embodiment of the present invention, but protection scope of the present invention not limited to this, is appointed
For what those of ordinary skill in the art, the invention discloses technical scope in, technology according to the present invention
Scheme and its inventive concept equivalent or change in addition, should all be included within the scope of the present invention.
Table 1
Table 2
Claims (3)
1. a kind of polyethylene film, which includes composite bed, intermediate layer and the hot sealing layer for overlapping successively, it is characterised in that described multiple
Closing layer includes：The Low Density Polyethylene of the metallocene PE and 30wt%～40wt% of 60wt%～70wt%；
The intermediate layer includes：The high density polyethylene (HDPE) of 30wt%～35wt%, the linear, low density of 30wt%～35wt% gather
The fluoride auxiliary agent of ethylene, the Low Density Polyethylene of 30wt%～35wt% and 0.2wt%～0.3wt%；
The hot sealing layer includes：The Low Density Polyethylene of 33wt%～35wt%, the enhancing polyethylene tree of 63wt%～65wt%
The opening agent of fat, the slipping agent of 0.5wt%～0.8wt% and 1.3wt%～2.0wt%；
Wherein, fusing point of the fusing point of composite bed higher than intermediate layer, the fusing point in intermediate layer are higher than the fusing point of hot sealing layer；It is described compound
The thickness ratio of layer, intermediate layer and hot sealing layer is 1:1.5～3:1；
On the polyethylene film film, the fusing point of each layer gradually lowers from composite bed in gradient to hot sealing layer direction, when heat during heat-sealing
Sealing is melted after reaching heat-sealing temperature first, the intermediate layer in outside, composite bed not up to corresponding fusing point.
2. a kind of Self stand bag laminated film, it is characterised in that：Which includes polyester layer, polyester aluminium coated successively and as right will
Polyethylene film described in 1, the wherein composite bed of polyethylene film is asked to contact with polyester aluminium coated.
3. a kind of Self stand bag, it is characterised in that：Its bag prepared by laminated film as claimed in claim 2, and and bag
Spout two parts composition of heat-sealing connection.
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| CN108359170A (en) * | 2018-02-26 | 2018-08-03 | 云南名博包装印刷有限公司 | A kind of multi-layer co-extruded polyethylene film and preparation method thereof |
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| FR3046206B1 (en) * | 2015-12-23 | 2018-01-12 | Sartorius Stedim Aseptics | METHOD FOR MANUFACTURING A SEALED CONTAINER |
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| CN113263808B (en) * | 2021-06-29 | 2022-12-02 | 江苏博生医用新材料股份有限公司 | Disposable biological membrane and preparation method and application thereof |
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| EP0707956A1 (en) * | 1994-10-13 | 1996-04-24 | The Procter & Gamble Company | Multilayer materials for making packages |
| CN1428276A (en) * | 2001-12-28 | 2003-07-09 | 党令军 | Composite packaging bag |
| US20080057238A1 (en) * | 2004-10-04 | 2008-03-06 | Borealis Technology Oy | Film |
| CN103770422B (en) * | 2014-01-23 | 2015-10-28 | 黄山永新股份有限公司 | High-stiffness puncture-resistant low-friction coefficient composite membrane and preparation method thereof |
| CN104260520B (en) * | 2014-09-11 | 2016-05-11 | 黄山永新股份有限公司 | Thick chilli sauce packaging composite film and preparation method thereof |
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