CN106739359B - A kind of non-stretched polyethylene film and preparation method thereof - Google Patents
A kind of non-stretched polyethylene film and preparation method thereof Download PDFInfo
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- CN106739359B CN106739359B CN201611249060.2A CN201611249060A CN106739359B CN 106739359 B CN106739359 B CN 106739359B CN 201611249060 A CN201611249060 A CN 201611249060A CN 106739359 B CN106739359 B CN 106739359B
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- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal 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
- B32B15/085—Layered products comprising a layer of metal comprising metal 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 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
- B32B27/06—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
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
-
- 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
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
-
- 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
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
-
- 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
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
Abstract
The invention discloses a kind of non-stretched polyethylene film and preparation method thereof, it is related to packaging film field of material technology.The present invention carries out heating plasticizing by that will prepare each layer component raw material, then extrudes, then obtains layer structure material by T-shaped mould head, by subsequent treatment, finally gives non-stretched polyethylene film.The film includes five-layer structure, respectively is hot sealing layer, the first intermediate layer, auxiliary layer, the second intermediate layer, the corona layer for aluminizer.Non-stretched polyethylene film intensity provided by the invention is big, and air penetrability is low, and penetrability is low, and adhesive force of aluminizing is strong, and heat sealability is good.
Description
Technical field
The present invention relates to packaging film field of material technology, more particularly to a kind of non-stretched polyethylene film and its preparation
Method.
Background technology
With the development of science and technology, plastic composite is compared with single combined material, often with more excellent
Physical and chemical performance, therefore use and more generalize.Prepared food packaging, Frozen Food Packaging, vacuum packaging etc. are required for largely
Laminated plastic film package material.But rate of perviousness still can often occur in current Laminated plastic film package material more higher, gas permeability
Higher, insufficient strength is big, and seals port fragility, food-safe to adversely affect situations such as often leaking air.
It can be seen that prior art could be improved and improve.
The content of the invention
In view of in place of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of non-stretched polyethylene film and
Its preparation method, it is intended to reduce the penetrability gas permeability of packing film material, increase intensity, improve heat sealability so that opening is held
Easily, at the same improve heat-sealing port intensity and protection effect.
To solve the above problems, technical scheme provided by the invention is：A kind of non-stretched polyethylene film, it includes five layers
Composite construction, it respectively is hot sealing layer, the first intermediate layer, auxiliary layer, the second intermediate layer, corona layer；The hot sealing layer into
Part includes polyethylene from high pressure process, linear polyethylene, metallocene PE and opening agent；First intermediate layer and the second intermediate layer system
Standby material is identical, and its composition includes polyethylene from high pressure process, low-pressure polyethylene and metallocene PE；The composition in the intermediate layer includes
Polyethylene from high pressure process, linear polyethylene, low-pressure polyethylene；The corona layer composition includes polyethylene from high pressure process, linear polyethylene, cyclopentadienyl gold
Belong to polyethylene and tackifier.
Described non-stretched polyethylene film, it is characterised in that the manufacture ingredient percent of the hot sealing layer is：It is high
Pressure polyethylene 20%-50%, linear polyethylene 20%-50%, metallocene PE 20%-50% and opening for increase opening
Mouth agent 1%-5%.
Described non-stretched polyethylene film, wherein, the first described intermediate layer and the second intermediate layer manufacture composition quality
Percentage is：Polyethylene from high pressure process 20%-50%, low-pressure polyethylene 20%-50%, metallocene PE 20%-50%.
Described non-stretched polyethylene film, wherein, the auxiliary layer manufacture ingredient percent is：Polyethylene from high pressure process
20%-50%, linear polyethylene 30%-60%, low-pressure polyethylene 5%-25%.
Described non-stretched polyethylene film, wherein, the manufacture ingredient percent of the corona layer is：The poly- second of high pressure
Alkene 20%-70%, linear polyethylene 20%-50%, metallocene PE 20%-70% and tackifier 0.1%-0.2%.
Described non-stretched polyethylene film, wherein, the hot sealing layer, the first intermediate layer, auxiliary layer, the second intermediate layer and
The thickness ratio of each layer is respectively in corona layer：Hot sealing layer 20-30%, the first intermediate layer 10-25%, auxiliary layer 15-25%,
Two intermediate layer 10-25%, corona layer 20-25%.
Described non-stretched polyethylene film, wherein, the opening agent main component is silica organic micro-spheres shape grain
Son；The linear polyethylene mass percent that the corona layer includes is 50%.
It is a kind of by any one of claim 1-7 non-stretched polyethylene film based on plating aluminium base, its feature exists
In, including non-stretched polyethylene film and aluminum membranous layer；The aluminum membranous layer is combined with the corona layer of the film.
A kind of preparation method as weighed the non-stretched polyethylene film of 1-7 any one, its step are as follows：
S1. prepare the feed proportioning of each layer component, then carry out heating plasticizing, melt raw material, then by the tree after plasticizing
Fat is extruded forward by the screw rod of extruder, and extruding overlapping is carried out by T-shaped mould head by designed layer of structure；
S2. after the resin extruded is by T-shaped get to know, main chilling roller is flowed to, is cooled and shaped by secondary chilling roller；
S3. the film thickness of shaping is carried out detecting thickness and controls thickness；
S4. sided corona treatment is carried out to corona layer, then winding and Ageing Treatment.
Described non-stretched polyethylene film preparation method, wherein, in the step S1 heating plasticizing and T-shaped mould head plus
Work temperature is 165 DEG C -250 DEG C.
Beneficial effect：The present invention is plastified by that will prepare each layer component raw material, is then extruded, then by T-shaped mould head
Flow casting molding, layer structure material is obtained, by subsequent treatment, finally give film.The film includes five-layer structure, successively
Respectively hot sealing layer, the first intermediate layer, auxiliary layer, the second intermediate layer, the corona layer for aluminizer.Pass through the preparation method system
The non-stretched polyethylene film obtained, hot sealing layer are bonded with the first intermediate layer so that the tension that hot sealing layer can strengthen hot sealing layer is strong
Degree, and the penetrability gas permeability of hot sealing layer also can be reduced further, under the auxiliary fitting effect of auxiliary layer, the first intermediate layer and
Second intermediate layer becomes the level mutually promoted, and not only intensity increases, and due to the transition of auxiliary so that penetrability is saturating
Big reduction quick to take offense.Corona layer is bonded with below the second intermediate layer, providing first of intensity protection well for film, can
To cause the second intermediate layer to avoid piercing through or scratching to greatest extent, moisture-penetrable ventilated protective action is preferably played.In addition, make
For plate aluminium base, after aluminizing, the adhesive force of aluminium lamination is very good, it is only necessary to add seldom tackifier can with reach well it is attached
Put forth effort；It because the proportioning of each layer raw material is different, can illustrate no tackifier and have plus during tackifier from different ratio,
Adhesive force situation of aluminizing is：Not plus during tackifier, the dealuminzation of aluminium coated 60%, when adding millesimal tackifier, aluminium coated 5% is de-
Aluminium, when adding 2/1000ths, aluminium coated will not dealuminzation,, can after the aluminizer and other color printing films are compound after being aluminized using the base material
With resistance to 90 degree, sterilize 30 minutes, be not in aluminium lamination transfer and layering, after heat-sealing, the position aluminium lamination of heat-sealing will not be transferred to coloured silk
On die, aluminizing for other base materials can not be all provided simultaneously with, the characteristic of our this base materials（It is provided simultaneously with heat-sealable, is resistant to
90 degree, sterilize 30 minutes, be not in aluminium lamination transfer and layering, after heat-sealing, the position aluminium lamination of heat-sealing will not be transferred to color printing film
It is first-class）.
Brief description of the drawings
Fig. 1 is non-stretched polyethylene film structural representation.
Fig. 2 is the matrix structure schematic diagram of aluminizing based on non-stretched polyethylene film.
Fig. 3 is non-stretched polyethylene film preparation method process chart.
Embodiment
The present invention provides a kind of polyethylene film, to make the purpose of the present invention, technical scheme and effect clearer, bright
Really, developing simultaneously referring to the drawings, the present invention is described in more detail for embodiment.It should be appreciated that specific implementation described herein
Example is not intended to limit the present invention only to explain the present invention.
Referring to Fig. 1, a kind of non-stretched polyethylene film provided by the present invention, including five layers of composite construction, distinguish successively
For hot sealing layer 100, the first intermediate layer 200, auxiliary layer 300, the second intermediate layer 400, corona layer 500；The bottom of the hot sealing layer 100
Portion is provided with the first intermediate layer 200, and the bottom in the first intermediate layer 200 is provided with the auxiliary layer 300 of auxiliary sticking, and the auxiliary
Layer 300 is arranged between the first intermediate layer 200 and the second intermediate layer 400, and the bottom in the second intermediate layer 400 is provided with corona layer
500；The composition of the hot sealing layer 100 includes polyethylene from high pressure process, linear polyethylene, metallocene PE and opening agent；Described
One intermediate layer 200 and the second intermediate layer 400 prepare that material is identical, the composition for being include polyethylene from high pressure process, low-pressure polyethylene and
Metallocene PE；The composition of the auxiliary layer 300 includes polyethylene from high pressure process, linear polyethylene and low-pressure polyethylene；The electricity
The composition of dizzy layer 500 is included by polyethylene from high pressure process, linear polyethylene, metallocene PE and tackifier, and it is attached to be mainly used in aluminium film
.Pass through the reasonable layout of five-layer structure so that the effect of each layer definitely, more rationally.Neighbourship hierarchy is closely tied
Close so that the stratified material intensity after compound significantly increases.
Further, in the non-stretched polyethylene film, the ingredient percent that the hot sealing layer 100 includes is：
Polyethylene from high pressure process 20%-50%, linear polyethylene 20%-50%, metallocene PE 20%-50% and opening agent 1%-5%；
The opening agent main material is silica and organic micro-spheres shape particle.Silica and organic micro-spheres shape particle are as heat-sealing
The opening agent of layer so that hot sealing layer has good Kekelé structure count, and is more prone to be open.The nontoxicity of silica so that heat
Sealing can preferably be used for packaging material for food.Silica can also improve the tensile strength and tension failure of hot sealing layer simultaneously
Elongation.Hot sealing layer contains linear polyethylene, although melting temperature improves, hot sealing layer has more superior anti-tensile strong
Degree, tearing toughness, environmental stress crack resistance, lower temperature resistance, heat resistance and paracentesis resistance.
Further, in the non-stretched polyethylene film, the first described intermediate layer 200 and the second intermediate layer 400 are wrapped
The ingredient percent included is：Polyethylene from high pressure process 20%-50%, low-pressure polyethylene 20%-50%, metallocene PE
20%-50%, there is high barrier.Described the first intermediate layer 200 and the second intermediate layer 400 with high barrier, to this
Film provides double-deck guarantee basis in terms of rate of perviousness air penetrability is reduced.
Further, in the non-stretched polyethylene film, the ingredient percent that the auxiliary layer 300 includes is：
Polyethylene from high pressure process 20%-50%, linear polyethylene 30%-60%, low-pressure polyethylene 5%-25%.Auxiliary layer 300 with it is described
First intermediate layer 200 and the second intermediate layer 400 are combined closely, and auxiliary patch well is served for the intermediate layer with high barrier
Cooperation is used so that overall barrier property is more prominent.
Further, in the non-stretched polyethylene film, the ingredient percent that the corona layer 500 includes is：
Polyethylene from high pressure process 20%-70%, linear polyethylene 20%-50%, metallocene PE 20%-70% and tackifier 0.1%-
0.2%.Tackifier cause corona layer to have more preferable adhesive force, and process and the substrate performance after aluminium film is plated for subsequently aluminizing
All it is beneficial.
Further, in the non-stretched polyethylene film, the hot sealing layer 100, the first intermediate layer 200, auxiliary layer
300th, the percentage thickness of each layer is respectively between the second intermediate layer 400, corona layer 500：20-30%, 10-25%, 15-
25%th, 10-25%, 20-25%.The thickness proportion causes in the case of the independent performance of guarantee level itself, between adjacent layer
Fitting it is even closer,.
Embodiment one
In the non-stretched polyethylene film, the hot sealing layer 100, the first intermediate layer 200, among auxiliary layer 300, second
Layer 400, the percentage thickness of 500 each layer of corona layer are respectively：20%th, 17.5%, 20%, 17.5%, 25%.Specifically, institute
The ingredient percent that stating hot sealing layer 100 includes is：Polyethylene from high pressure process 20%, linear polyethylene 30%, metallocene PE
48% and opening agent 2%；The ingredient percent that described the first intermediate layer 200 and the second intermediate layer 400 includes is：High pressure
Polyethylene 20%, low-pressure polyethylene 30%, metallocene PE 50%；The ingredient percent that the auxiliary layer 300 includes
For：Polyethylene from high pressure process 40%, linear polyethylene 50%, low-pressure polyethylene 10%；The composition quality hundred that the corona layer 500 includes
Point ratio is：Polyethylene from high pressure process 24%, linear polyethylene 50%, metallocene PE 25.8% and tackifier 0.2%.Corona layer
Thickness is thicker with respect to other levels, more firm as aluminium film attached base afterwards.Meanwhile corona layer is as the film substrate
First of protection, the thickness of the embodiment can increase tensile strength, tearing toughness and paracentesis resistance.
Embodiment two
In the non-stretched polyethylene film, the hot sealing layer 100, the first intermediate layer 200, among auxiliary layer 300, second
Layer 400, each layer percentage thickness between corona layer 500 are respectively：20%th, 20%, 20%, 15%, 25%.Specifically, institute
The ingredient percent that stating hot sealing layer 100 includes is：Polyethylene from high pressure process 33%, linear polyethylene 33%, metallocene PE
33% and opening agent 1%；The ingredient percent that described the first intermediate layer 200 and the second intermediate layer 400 includes is：High pressure
Polyethylene 33%, low-pressure polyethylene 33%, metallocene PE 33%；The ingredient percent that the auxiliary layer 300 includes
For：Polyethylene from high pressure process 45%, linear polyethylene 50%, low-pressure polyethylene 5%；The composition quality hundred that the corona layer 500 includes
It is polyethylene from high pressure process 25.9%, linear polyethylene 50%, metallocene PE 24% and tackifier 0.1% to divide ratio.
Embodiment three
In the non-stretched polyethylene film, the hot sealing layer 100, the first intermediate layer 200, among auxiliary layer 300, second
Layer 400, each layer percentage thickness between corona layer 500 are respectively：25%th, 15%, 20%, 15%, 25%.Specifically, institute
The ingredient percent that stating hot sealing layer 100 includes is：Polyethylene from high pressure process 20%, linear polyethylene 50%, metallocene PE
25% and opening agent 5%；The ingredient percent that described the first intermediate layer 200 and the second intermediate layer 400 includes is：High pressure
Polyethylene 20%, low-pressure polyethylene 50%, metallocene PE 30%；The ingredient percent that the auxiliary layer 300 includes
For：Polyethylene from high pressure process 40%, linear polyethylene 50%, low-pressure polyethylene 10%；The composition quality hundred that the corona layer 500 includes
It is polyethylene from high pressure process 30%, linear polyethylene 39.82%, metallocene PE 30% and tackifier 0.18% to divide ratio.
Example IV
In the non-stretched polyethylene film, the hot sealing layer 100, the first intermediate layer 200, among auxiliary layer 300, second
Layer 400, the percentage thickness between 500 each layer of corona layer are respectively：20%th, 15%, 25%, 15%, 25%.Specifically, institute
The ingredient percent that stating hot sealing layer 100 includes is：Polyethylene from high pressure process 50%, linear polyethylene 24%, metallocene PE
24% and opening agent 2%；The ingredient percent that described the first intermediate layer 200 and the second intermediate layer 400 includes is：High pressure
Polyethylene 50%, low-pressure polyethylene 25%, metallocene PE 25%；The ingredient percent that the auxiliary layer 300 includes
For：Polyethylene from high pressure process 50%, linear polyethylene 35%, low-pressure polyethylene 15%；The composition quality hundred that the corona layer 500 includes
It is polyethylene from high pressure process 33%, linear polyethylene 33%, metallocene PE 33.85% and tackifier 0.15% to divide ratio.
Further, in the non-stretched polyethylene film, the non-stretched polyethylene film is that thickness is 30-100 μm
Base material.
Preferably, the non-stretched polyethylene film is the base material that thickness is 50-80 μm.
Reference picture 2, a kind of plating aluminium base based on described non-stretched polyethylene film, including hot sealing layer 100,
One intermediate layer 200, auxiliary layer 300, the second intermediate layer 400, corona layer 500 and aluminum membranous layer 600；The aluminum membranous layer 600 is incorporated into
The corona layer 500 of the polyethylene film.Based on the non-stretched polyethylene film, aluminizing for aluminium film is plated in its corona layer
Base material, aluminum membranous layer are not allowed easily peelable, and have good mirror effect.Shown according to result, be 30 DEG C in temperature, it is relatively wet
Spend to pass through 24 hours under 90% experiment condition, the permeability rate of the plating aluminium base is the g/ ㎡ of 1.5 g/ ㎡ 24h ~ 2.5
24h。
Reference picture 3, a kind of preparation method of non-stretched polyethylene film, its primary raw material are polyethylene, specific poly- second
Alkene includes polyethylene from high pressure process, low-pressure polyethylene, linear polyethylene, metallocene PE, based on these raw material, adds suitable
The adjuvant of amount, non-stretched polyethylene film is prepared using five-layer co-squeezing the tape casting；Its step is as follows：
S1. prepare the feed proportioning of each layer component, then carry out heating plasticizing, melt raw material, then by the tree after plasticizing
Fat is extruded forward by the screw rod of extruder, and extruding overlapping is carried out by T-shaped mould head by designed layer of structure；
S2. after the resin extruded is by T-shaped get to know, main chilling roller is flowed to, is cooled and shaped by secondary chilling roller；
S3. the film thickness of shaping is carried out detecting thickness and controls thickness；
S4. sided corona treatment is carried out to corona layer, then winding and Ageing Treatment.
Furtherly, the processing temperature of heating plasticizing and T-shaped mould head is 165 DEG C -250 DEG C in the step S1.
Above-mentioned Ageing Treatment refers to the film produced due to technique needs, is putting 24 hours to 48 hours.
The non-stretched polyethylene film that finally obtained thickness is 30-100 μm in actual production, preferable thickness is 50-
80 μm, packaging of testing afterwards.
In the preparation method of the non-stretched polyethylene film, raw material extruder heating and temperature control at 160 DEG C ---
Between 250 DEG C.After the raw material specifically prepared enters extruder, 160 DEG C are warmed to, then along extruder material outlet direction
Be stepped up to 250 degrees Celsius, certainly, each layer raw material either match it is variant, among actual production process, according to each
The actual conditions of level raw material carry out appropriately selected in the temperature range.The non-stretched polyethylene that the preparation method obtains when
It is shorter to imitate processing time, it is only necessary to 24-48 hours, compared to it is common generally require 72-120 hours and save a large amount of when
Between.The material come out from outlet of extruder, process are T-shaped（Five runners it is compound）The compound curtain coating of die head, obtain non-stretched poly- second
Alkene film bulk, by a series of follow-up processing, finally give the non-stretched polyethylene film available for aluminizer.
In summary, the present invention is by providing a kind of non-stretched polyethylene film and preparation method thereof, the original that will have been configured
By the processing of extruder, T-shaped mould head carries out curtain coating and is combined material again afterwards, finally gives non-stretched polyethylene film, wraps
Include five layers of composite construction, respectively hot sealing layer, the first intermediate layer, auxiliary layer, the second intermediate layer, corona layer.
Advantages of the present invention has：
1st, film is five-layer structure, material similar compatibility itself, and adjacent stratified material has similar material composition so that
The adjacent layer of material combines even closer, complements each other, i.e., mutually promotes again independently of each other so that the effect of each layer is brighter
Really, more rationally, the stratified material intensity after compound significantly increases, and penetrability gas permeability reduces.
2nd, as hot sealing layer, the low-pressure polyethylene used using linear polyethylene instead of common material, although melting temperature
Improve, but its tensile strength, tearing toughness, environmental stress crack resistance, lower temperature resistance, heat resistance and paracentesis resistance pole
To be superior.To most of material more wide condition is provided when packaging, such as flexible material（Soft sweets）Or
Rigid material relatively（Dried fish）, can use so that applicability is stronger.In packaging process, it will not always worry to pierce through
And efficiency is influenceed, likewise, in transportation, decrease gas leakage and contaminated probability.
3rd, as intermediate layer, because of the protection of auxiliary layer and corona layer, so tensile strength, tearing toughness,
Without so high requirement in terms of environmental stress crack resistance, lower temperature resistance, heat resistance and paracentesis resistance, based on this, pass through height
The substantially suitable combined material of three kinds of pressure polyethylene, low-pressure polyethylene, metallocene PE components is to form finer and close height
Barrier layer, greatly reduce penetrability and gas permeability.Intermediate layer, for packaging for foodstuff, can preferably prevent as high-obstruction
Block impervious and aqueous vapor infiltration, reduce the bacterial invasion in oxidation course and air.
4th, first overcoat of the corona layer as the thin-film material, tensile strength, tearing toughness and paracentesis resistance are particularly
Important, so the ratio that the thickness of corona layer typically constitutes from whole film thickness is slightly larger, and the content of linear polyethylene is tended to
Slightly larger value, it has been up to the 50% of the layer component.After corona layer is aluminized, turn into the first overcoat, performance jointly with aluminum membranous layer
Have been further upgraded.
5th, plate the plating aluminium base of aluminium film in the corona layer of the non-stretched polyethylene film, aluminum membranous layer do not allow it is easily peelable, and
And there is good mirror effect.Shown according to result, be 30 DEG C in temperature, the process that relative humidity is 90% 24 hours, the plating
The permeability rate of aluminium base is 1.5 g/ ㎡ 24h -2.5 g/ ㎡ 24h.
It is understood that for those of ordinary skills, can be with technique according to the invention scheme and its hair
Bright design is subject to equivalent substitution or change, and all these changes or replacement should all belong to the guarantor of appended claims of the invention
Protect scope.
Claims (8)
1. a kind of non-stretched polyethylene film, it is characterised in that including five layers of composite construction, respectively be hot sealing layer, first
Intermediate layer, auxiliary layer, the second intermediate layer, corona layer；The composition of the hot sealing layer includes polyethylene from high pressure process, linear polyethylene, cyclopentadienyl
Metal polyethylene and opening agent；First intermediate layer and the second intermediate layer prepare that material is identical, and its composition includes the poly- second of high pressure
Alkene, low-pressure polyethylene and metallocene PE；The composition of the auxiliary layer includes polyethylene from high pressure process, linear polyethylene, low pressure and gathered
Ethene；The corona layer composition includes polyethylene from high pressure process, linear polyethylene, metallocene PE and tackifier；
The first described intermediate layer and the second intermediate layer manufacture ingredient percent are：Polyethylene from high pressure process 20%-50%, low pressure
Polyethylene 20%-50%, metallocene PE 20%-50%；
The manufacture ingredient percent of the corona layer is：Polyethylene from high pressure process 20%-70%, linear polyethylene 20%-50%,
Metallocene PE 20%-70% and tackifier 0.1%-0.2%.
2. non-stretched polyethylene film according to claim 1, it is characterised in that the manufacture composition quality of the hot sealing layer
Percentage is：Polyethylene from high pressure process 20%-50%, linear polyethylene 20%-50%, metallocene PE 20%-50% and it is used for
Increase the opening agent 1%-5% of opening.
3. non-stretched polyethylene film according to claim 1, it is characterised in that the auxiliary layer manufactures composition quality hundred
Point ratio is：Polyethylene from high pressure process 20%-50%, linear polyethylene 30%-60%, low-pressure polyethylene 5%-25%.
4. non-stretched polyethylene film according to claim 1, it is characterised in that the hot sealing layer, the first intermediate layer, auxiliary
The thickness ratio for helping each layer in layer, the second intermediate layer and corona layer is respectively：Hot sealing layer 20-30%, the first intermediate layer 10-25%,
Auxiliary layer 15-25%, the second intermediate layer 10-25%, corona layer 20-25%.
5. non-stretched polyethylene film according to claim 1, it is characterised in that the opening agent main component is dioxy
SiClx organic micro-spheres shape particle；The linear polyethylene mass percent that the corona layer includes is 50%.
6. it is a kind of by any one of claim 1-5 non-stretched polyethylene film based on plating aluminium base, it is characterised in that
Including non-stretched polyethylene film and aluminum membranous layer；The aluminum membranous layer is combined with the corona layer of the film.
7. a kind of preparation method as weighed the non-stretched polyethylene film of 1-5 any one, its step is as follows：
S1. prepare the feed proportioning of each layer component, then carry out heating plasticizing, melt raw material, then the resin after plasticizing is led to
The screw rod for crossing extruder is extruded forward, and extruding overlapping is carried out by T-shaped mould head by designed layer of structure；
S2. after the resin extruded is by T-shaped get to know, main chilling roller is flowed to, is cooled and shaped by secondary chilling roller；
S3. the film thickness of shaping is carried out detecting thickness and controls thickness；
S4. sided corona treatment is carried out to corona layer, then winding and Ageing Treatment.
8. non-stretched polyethylene film preparation method according to claim 7, it is characterised in that heated in the step S1
The processing temperature of plasticizing and T-shaped mould head is 165 DEG C -250 DEG C.
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| CN109291591A (en) * | 2018-10-08 | 2019-02-01 | 广东铭丰包装材料有限公司 | A kind of polyethylene film and its application |
| CN110722857B (en) * | 2019-10-31 | 2021-08-31 | 浙江比例聚合科技股份有限公司 | PE vacuum aluminized composite film and preparation method thereof |
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| US4734317A (en) * | 1985-03-15 | 1988-03-29 | Hoechst Aktiengesellschaft | Biaxially oriented polyolefin multi-layer film |
| CN104191766A (en) * | 2014-09-03 | 2014-12-10 | 黄山永新股份有限公司 | Polyethylene film, packaging composite film and preparation method thereof |
| CN104354427A (en) * | 2014-12-01 | 2015-02-18 | 东莞市正新包装制品有限公司 | Five-layer polyethylene repackaging hot shrinkable film and preparation method thereof |
| CN104416987A (en) * | 2013-08-30 | 2015-03-18 | 东莞市正新包装制品有限公司 | Low-thickness polyethylene heat shrinkable film |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4734317A (en) * | 1985-03-15 | 1988-03-29 | Hoechst Aktiengesellschaft | Biaxially oriented polyolefin multi-layer film |
| CN104416987A (en) * | 2013-08-30 | 2015-03-18 | 东莞市正新包装制品有限公司 | Low-thickness polyethylene heat shrinkable film |
| CN104191766A (en) * | 2014-09-03 | 2014-12-10 | 黄山永新股份有限公司 | Polyethylene film, packaging composite film and preparation method thereof |
| CN104354427A (en) * | 2014-12-01 | 2015-02-18 | 东莞市正新包装制品有限公司 | Five-layer polyethylene repackaging hot shrinkable film and preparation method thereof |
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