CN106393834A - Composite film - Google Patents
Composite film Download PDFInfo
- Publication number
- CN106393834A CN106393834A CN201510466241.XA CN201510466241A CN106393834A CN 106393834 A CN106393834 A CN 106393834A CN 201510466241 A CN201510466241 A CN 201510466241A CN 106393834 A CN106393834 A CN 106393834A
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- China
- Prior art keywords
- composite membrane
- film
- polypropylene
- polyethylene
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- 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
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
The invention relates to a composite film. The composite film is characterized by comprising at least one layer of casting film, at least one layer of blow-molding film and an adhesive layer located between the casting film and the blow-molding film. The invention also relates to a preparation method and application of the composite film.
Description
Technical field
The present invention relates to a kind of composite membrane.Specifically, the present invention relates to a kind of have improvement
The composite membrane of the transparency, boiling resistance and/or mouldability of performance such as improvement.The present invention also relates to
And the preparation method of composite membrane and purposes.
Background technology
Plastic sheeting has been widely used for the product packaging in the fields such as food, medicine, chemical industry,
The life giving people brings great convenience.Conventional can be used for preparing the poly- of plastic sheeting
Compound have polyethylene (PE), polrvinyl chloride (PVC), polystyrene (PS), polyester (PET),
Polypropylene (PP), nylon (PA) etc..The structure of polymer is different, obtained plastics
Thin film also can difference in performance.Therefore it will usually by multilamellar is had different performance
The thin film of advantage carries out being combined that to obtain multi-functional, high performance composite membrane growing to meet
Application requirement.
The forming method of multilayer complex films has a lot, such as rubbing method, laminating and multi-layer co-extruded
Method.At present, being most widely used of co-extrusion process, it is using two or several extruders
The resin of various difference in functionalitys is melt extruded respectively, by respective runner in die head or mould
Head is outer to be converged, then through inflation, cooling combined together.The method not only enormously simplify production
Operation, and materials are few, can cut down the consumption of raw materials and production cost simultaneously.However, this work
Skill there are still some drawbacks.For example, the mobility of material resin is had high demands, mobility is too
Between poor or several resin, mobility difference is too big, all can be affected and drop because laminar flow is formed
The barrier property of low composite membrane, and transparency generally not high, drawing and forming and boiling resistance
Can be not ideal enough.
Therefore, there is still a need for a kind of more excellent composite membrane of performance.
Content of the invention
In the first aspect, the present invention relates to a kind of composite membrane is it is characterised in that described composite membrane
Comprise at least one of which casting films, at least one of which blown film and be located at described casting films and described blow
Adhesive phase between plastic film.
In second aspect, the present invention relates to a kind of method preparing composite membrane, including by least
One layer of casting films and at least one of which blown film carry out compound step by binding agent.
At the 3rd aspect, the present invention relates to composite membrane is used for packaged food, medicine or Medical treatment device
The purposes of material.
Brief description
Detailed explanation is carried out to the present invention by detailed description below and accompanying drawing, with
Phase, those skilled in the art better understood when the present invention, but it is not intended that with any side
Formula limits the scope of the present invention.
Fig. 1 illustrates to be made respectively according to the composite membrane in embodiments of the invention 1 and comparative example 1
Standby become the wide 13mm of 5 long 50mm sample decocting in water 30min in 95 DEG C of hot water before and after
Cosmetic variation.
Fig. 2 a and Fig. 2 b is shown respectively by answering according to embodiments of the invention 2 and comparative example 2
Close film and carry out moulded products obtained from drawing and forming.
Specific embodiment
Numerical range herein is included from lower value to high value with a unit as increment
And include all of value of described lower value and described high value.For example, if numerical range is
100 to 500, then should be considered as by all single value such as 100,101,102 ... 498,
499 list one by one, also should be considered as listing all subranges such as 100 to 144,155
To 170,197 to 200,268-390,420-500 etc..
As used herein, term " compositionss " refers to the mixing of two or more materials
Thing.Including in the composition be mixture after pre-reaction, reaction and reaction, after wherein reacting
Mixture will include the unreacted components of product and by-product and reactant mixture and divides
Solution product, if catabolite exists, it is by one of pre-reaction or reactant mixture or many
Plant component to be formed.
As used herein, term " blend ", " blend polymer " refer to two kinds or more
The compositionss of multiple polymers.Such blend is can to mix or immiscible.This common
Mixed thing can be homogeneous or out-phase, exist be separated or do not exist separated.
Composite membrane
The present invention pass through will at least one layer casting films with least one of which blown film by positioned at described
Adhesive phase between casting films and described blown film is combined, and overcomes casting films and blowing
The respective shortcoming of film, thus provide a kind of more excellent composite membrane of performance.
As used herein, term " casting films " refers to producing by melt curtain coating quenching
Plant tensionless winkler foundation, nondirectional cast film.For example, the casting films prepared by casting method,
Extruder can be first passed through raw material plastifying fusion, then pass through T-type structure mould and squeeze
Go out, be cast in the form of sheets on the roll surface of the cooling roller rotating smoothly, diaphragm is on cooling roller
Cooled cooling sizing, then after traction, trimming, product is wound.The speed of production of casting films
Hurry up, yield is high, there is the preferable transparency, glossiness and thickness evenness.
Casting films can be produced by such as solvent cast method or extrusion the tape casting.Solvent cast method
The casting films producing can have very little thickness, such as 1-10 μm, especially 1-3 μm
Or 5-8 μm.The curtain coating film thickness that extrusion the tape casting produces is larger, for example, can be more than 10 μm,
Even 20-30 μm or bigger.In one embodiment of the invention, described casting films
Thickness can be 10-500 μm, preferably 20-400 μm, more preferably 40-300 μm, even more excellent
Select 50-200 μm.
Casting films can be monolayer cast film or Multi-layer cast film.Multi-layer cast film can
Obtained it is also possible to be obtained by multi-layer co-extruded curtain coating with being combined by multiple monolayer cast film.Single
Layer casting films usually require that material at low temperature heat sealability and pliability are good.Multi-layer co-extruded casting films one
As can be divided into hot sealing layer, supporting layer, three layers of corona layer, compared with monofilm width in the selection of material,
Can individually select to meet the material that each layer requires, give thin film with different functions and purposes.
Wherein hot sealing layer will carry out heat sealing processing it is desirable to the fusing point of material is relatively low, and hot melt will be got well,
Heat-sealing temperature is wide, and sealing will be easily；Supporting layer is played a supporting role to thin film, increases thin film
Very property；Corona layer will be printed or metalized is it is desirable to there be the surface tension of appropriateness,
Strict restriction is added with to auxiliary agent.According to one embodiment of the invention, described curtain coating
Film is selected from monolayer cast film, multi-layer co-extruded casting films and combinations thereof.
Casting films can be produced using any suitable material.According to one embodiment of the present invention
Case, described casting films by selected from polypropylene, polyethylene, polyester, EVA,
One or more of polyamide, polrvinyl chloride, polyvinylidene chloride are made.
As used herein, term " blown film " refers to obtain extruded for melt or injection moulding
To tubular parison and carry out oriented film obtained from inflation.For example, resin is added to extruder,
Resin melting under screw rod transmission, shearing and heat effect；Fused materials are passed through filter screen, many
Orifice plate, continuously extrudes from head annular mouth mould, in annular membrane tube in uniform thickness；From head
Appropriate compressed air is blown in membrane tube for bottom so as to radial direction inflation, is drawn in frame simultaneously
Portion's carry-over pinch rolls step up longitudinal drawing-off；Using the cooling vane positioned at head top, cold wind is blowed to film
Bubble outer surface, makes film bubble cool down and continues to shape under cooling in traction film bubble surrounding air, by people
Letter stencil laminated (wide cut inflation film need to be inserted folded)；Then under bottom traction apparatuss effect, thin
Film is curled into film roll through guide roller.According to the difference of lead, can by upper blowing method,
Flat blowing method or lower blowing method are obtained blown film.Blown film is due to through inflation and drawing-off, usually permissible
Obtain biaxial tension deformation, so that the mechanical strength of thin film is increased.Simultaneously as blown film
The economy producing, such as slitter edge free material in production process, yield rate be higher, simple to operate,
The features such as technology controlling and process is easy, blown film occupies absolute advantagess in plastic sheeting.But, with
Casting films are compared, and the film gauge uniformity of blown film is poor.
The thickness of blown film can change in the range of 5-2500 μm.In the present invention one
In embodiment, the thickness of described blown film can be 5-1000 μm, such as 10-800 μm,
Especially 20-500 μm, preferably 30-300 μm, more preferably 40-100 μm.
Blown film can be monolayer blown film or multilayer blown film.Multilayer blown film can
Obtained it is also possible to be obtained by Multi-layer blown film with being combined by multiple monolayer blown films.Altogether
Extrusion is those skilled in the known art, for example, may comprise steps of：Using multi-layer co-extruded
Membrane equipment, by the polymer composition of multiple meltings at die head exit in the molten state
Blown film, be cast, extrude and be laminated together, while gradually cooling down, experience stretching,
Crimping device is reached after the complicated interaction of orientation and crystallization.Multi-layer blown film film is
Different ratios of raw materials extrudes, through multiple die heads, the thin film being composited simultaneously, the usual energy of this film
The feature performance benefit of each layers enough comprehensive, such as good barrier property, fresh-keeping, damp proof, frost protection, every
The features such as oxygen, oil resistant, can be widely used for various application-specific.However, the number of plies is more, co-extrusion
The cost of equipment is also higher.According to one embodiment of the invention, described blown film is many
Layer coextrusion blow film.
Typical Multi-layer blown film film can include main stress layer, obstruct as needed at present
Layer, hot sealing layer, strippable coating etc..Main stress layer for example can adopt polypropylene, polyethylene
Deng for raw material, barrier layer can be former using such as ethylene-vinyl alcohol copolymer, polyamide etc.
Material, hot sealing layer can be raw material using such as polyethylene, polypropylene etc..Permissible between adjacent layer
It is with or without adhesive linkage.
In one embodiment of the invention, multi-layer co-extruded composite membrane can using ABA,
The symmetrical structures such as ABCBA or ABCDCBA.
Blown film can be produced using any suitable material.According to one embodiment of the present invention
Case, described blown film by selected from polypropylene, polyethylene, polyester, EVA,
In polyamide, polyvinyl acetate, polrvinyl chloride, ethylene-vinyl alcohol copolymer, gather inclined two
One or more of vinyl chloride, polyvinyl fluoride, polystyrene, polylactic acid are made.
In a preferred embodiment, described casting films are selected from polypropylene casting film, polyester current
Prolong film and combinations thereof, described blown film is selected from the Multi-layer blown film film with following structure：Poly-
Propylene/polyamide/polypropylene, polyethylene/polyamide/polyethylene, polyethylene/polyamide/polypropylene,
Polypropylene/ethylene-ethenol copolymer/polypropylene, polyethylene/vinyl-ethenol copolymer/poly- second
Alkene, polyethylene/vinyl-ethenol copolymer/polypropylene, polypropylene/polyamide/ethylene-vinyl alcohol
Copolymer/polyamide/polypropylene, polyethylene/polyamide/ethylene-vinyl alcohol copolymer/polyamide/
Polyethylene, polyethylene/polyamide/ethylene-vinyl alcohol copolymer/polyamide/polypropylene and combinations thereof,
And described adhesive is dual-component polyurethane type adhesive for solvent-free use.
It is applied to the binding agent that described casting films and described blown film are combined with each other can adopt
With any binding agent commonly used in the art, it is selected from solvent type adhesive, adhesive for solvent-free use
And combinations thereof.Preferably described adhesive can be used for food or drug packaging.Specific example
Including VAE class binding agent, polyacrylate binding agent, poly- ammonia
Ester adhesive, hysol etc..Polyurethane binding is particularly suited for this
Bright casting films of different nature and blown film are bonded together to provide there are excellent properties
Composite membrane.The polyurethane binder that can use include but is not limited to water-based polyurethane binding agent,
Hot melt type polyurethane binding agent, solvent borne polyurethane binding agent, no-solvent type polyurethane binder.
Polyurethane binding can be single-component adhesive or two-component adhesive.One
In individual embodiment, described adhesive adopts dual-component polyurethane class binding agent.The poly- ammonia of double-component
Ester adhesive is made up of first, second two component, according to base material to be bonded by two components during use
Weigh mixing by different proportion can be bonded, and can be in cold curing.Dual-component polyurethane
The first component of class binding agent can be to generate end group by linear polyurethane and isocyanates copolymerization to be
The linear product of hydroxyl, component B can be that isocyanates are with the end group of polyol reaction
The performed polymer of isocyanates.Dual-component polyurethane class binding agent has good adhesiveness, softness
Property, insulating properties and wearability, and can weak acid resistant, be particularly well-suited to packaging for foodstuff.
In another embodiment, described adhesive layer is using comprising hydroxy-end capped polyester ammonia
Ester is as the two-component adhesive of main component.
In still another embodiment, described adhesive can comprise maleic anhydride modification
Polyethylene and ethylene copolymers or vinyl-vinyl acetate copolymer.
In a further embodiment, described adhesive is selected from organosilan binding agent, polyurethane
Binding agent, polyorganosiloxane adhesive and combinations thereof.
The instantiation of the binding agent that can use also has Equistar chemical company of the U.S. to be produced
The trade mark be Plexar, Px3410, PX3747 can extrusioning adhesive, this binding agent lead to
Cross the accreditation to binding agent for the U.S. FDA, also obtain limited directly connecing with food simultaneously
Tactile accreditation.
Composite membrane according to the present invention can have one or more of the following advantages：1) compare
The blown film of same thickness is preferably transparent；2) casting films produced sudden and violent muscle in rolling
The problem of the thickness evenness difference of problem and/or blown film can be made up by binding agent；3)
Boiling resistance is more preferable compared with multilayer complex films of the prior art；3) with of the prior art
It is more preferable that multilayer complex films compare drawing and forming.
The preparation method of composite membrane
In a preferred embodiment, The inventive process provides a kind of composite membrane prepared
Method, is combined by binding agent including by least one layer of casting films and at least one of which blown film
Step.
Composite membrane according to the present invention can for example pass through print by arbitrarily suitable method preparation
Prepared by mould mixing extruding, film extrusion lay-up method, the gluing method such as compound.
In order to bigizationner play the advantage of composite membrane according to the present invention, the composite membrane of the present invention
Can be, but not limited to the method preparation by comprising the following steps：Binding agent is coated uniformly on institute
State on casting films, described blown film or the surface to be joined of the two, by described surface to be joined phase
To placement, binding agent after roll-in is smooth, is made to solidify.
In one embodiment of the invention, described casting films and blown film can pass through ability
Dry-lamination process known to field technique personnel is combined, and concrete steps for example can include
Binding agent is coated on by described casting films and/or the surface of described blown film using dry compound machine
On, two surfaces are pasted and heat ripening.
Other are prepared the present invention be applied to the composite membrane manufacturing technology or be used for of the present invention and use
Casting films and the technology of blown film can find from following document：The Encyclopedia
Of Chemical Technology, Kirk-Othmer, the third edition, John Wiley＆Sons,
New York, volume 1981,16,416-417 page and volume 18,191-192 page；Wilmer
The Packaging Foods With Plastics of A.Jenkins and James P.Harrington,
(1991), 19-27 page；" the Coextrusion Basics " of Thomas I.Butler, Film
Extrusion Manual:31-80 page of Process, Materials, Properties is (by TAPPI
Press (1992) is open)；" the Coextrusion For of W.J.Schrenk and C.R.Finch
Barrier Packaging ", Society of Plastics Engineers RETEC Proceedings,
June, 15-17 (1981), 211-229 page；K.R.Osborn and W.A.Jenkins；With
Plastic Films, Technology and Packaging Applications (Technomic
Publishing Co., Inc. (1992)), these documents are passed through to quote to be fully incorporated by here
Herein.
The purposes of composite membrane
Multiple use be can be used for according to the composite membrane of the present invention, in particular for needing resistance to steaming and decocting
Performance or the occasion of the drawing and forming having needed.
In one embodiment, packaged food or medicine be can be used for according to the composite membrane of the present invention
Product.In further embodiment, described food or medicine are in the composite membrane bag through the present invention
Sterilization treatment can be carried out after dress.Described sterilization treatment can adopt heat sterilizer, for example xeothermic,
Damp and hot and intermittent-heating sterilizing etc..Heat sterilizer makes all eggs in microbial cell using high temperature
White matter degeneration, enzymatic activity disappears, and causes cell death.
In one embodiment of the invention, described sterilization treatment include pasteurized process,
Boiling sterilization, interval steam sterilization, autoclaving, circulation steam sterilization, microwave sterilizating
One or more of.
In one embodiment, the composite membrane of the present invention can be used for preparing steaming and decocting film or Pasteur
Sterilizing membrane.Described steaming and decocting film or pasteurize film can be used for packaged food, medicine or Medical treatment device
Material, such as Petaso, vegetable Lay, bean product, fish, cure foods, fruit, milk product, tea
Leaf, meat productss, agricultural product, marine product, liquid preparation, solid chemicals, mealy medicine, one
Secondary property needle tubing, disposable aspiration needle, tube for transfusion, implantation instrument, mask etc..
In one embodiment, the composite membrane of the present invention can be used for preparing packaging bag or bubble-cap
Packaging.Described packaging bag or blister package can be used for containing liquid or solid material.Solidss
Matter can be selected from one or more of block, graininess and powdered substance.Cake mass example
As tablet, pill, serving piece (such as thumbnail, Petaso block) etc..Particulate material is for example
Plant seed (such as Semen Helianthi, Semen Citrulli etc.), flavoring agent (such as anise, Pericarpium Zanthoxyli etc.),
Rice, Semen setariae, Semen Maydiss, beans etc..Powdered substance such as flour, milk powder, Semen Glycines powder etc..
The composite membrane of the present invention and packaging bag prepared therefrom or blister package can be used for very
Empty package, non-real empty package or gas flush packaging.In a specific embodiment, the present invention
Composite membrane is particularly well-suited to needs due to its excellent boiling resistance energy or drawing and forming
The cooked product carrying out pasteurized process is vacuum-packed to strengthen product for consumer
Captivation.
Embodiment
With reference to embodiment, some specific embodiments of the present invention are explained, from
And make those skilled in the art be more clearly understood that technical scheme and its advantage, but
It is to form limitation of the present invention never in any form.
1. material
Prepare comparative example and the embodiment sample of composite membrane using following material.
2. the preparation of composite membrane
2.1 comparative examples 1
Preparing thickness using ReifenHouser SW2200 type Multi-layer co-extrusion film-blowing equipment is
120 μm of PE/PA/EVOH/PA/PE PP TYPE, adopts between wherein PE and PA
Bemis adhesive articulamentum.The die head temperature of PE layer is 220 DEG C, and hauling speed is
5.5～8m/min.The die head temperature of PA layer is 240 DEG C, and hauling speed is 8～12m/min.
The die head temperature of evoh layer is 240 DEG C, and hauling speed is 5～12m/min.This co-extrusion film
The composition of structure and each layer and thickness are as follows：
| Raw material forms | Thickness (μm) | |
| Ground floor | PE | 54 |
| The second layer | Articulamentum | 2 |
| Third layer | PA | 2 |
| 4th layer | EVOH | 4 |
| Layer 5 | PA | 2 |
| Layer 6 | Articulamentum | 2 |
| Layer 7 | PE | 54 |
2.2 embodiments 1
Preparing thickness using ReifenHouser SW2200 type Multi-layer co-extrusion film-blowing equipment is
58 μm of PE/PA/EVOH/PA/PE PP TYPE, adopts between wherein PE and PA
Bemis adhesive articulamentum.The die head temperature of PE layer is 220 DEG C, and hauling speed is
5.5～8m/min.The die head temperature of PA layer is 240 DEG C, and hauling speed is 8～12m/min.
The die head temperature of evoh layer is 240 DEG C, and hauling speed is 5～12m/min.This co-extrusion film
The composition of structure and each layer and thickness are as follows：
| Raw material forms | Thickness (μm) | |
| Ground floor | PE | 23 |
| The second layer | Binding agent | 2 |
| Third layer | PA | 2 |
| 4th layer | EVOH | 4 |
| Layer 5 | PA | 2 |
| Layer 6 | Binding agent | 2 |
| Layer 7 | PE | 23 |
The PP curtain coating being 60 μm by thickness using Taiwan three summer jobs DL-S1300 type dry compound machine
Ground floor in film and above-mentioned PP TYPE pass through 750E two component polyurethane glue with
2.6g/m2Spread be bonded together, then ripening 48h at a temperature of 55 DEG C.Obtain
The gross thickness of composite membrane is 120 μm, and wherein the thickness of polyurethane binder is 2 μm.
2.3 comparative examples 2
Preparing thickness using ReifenHouser SW2200 type Multi-layer co-extrusion film-blowing equipment is
200 μm of PE/PA/EVOH/PA/PE PP TYPE, adopts between wherein PE and PA
Bemis adhesive articulamentum.The die head temperature of PE layer is 220 DEG C, and hauling speed is
5.5～8m/min.The die head temperature of PA layer is 240 DEG C, and hauling speed is 8～12m/min.
The die head temperature of evoh layer is 240 DEG C, and hauling speed is 5～12m/min.This co-extrusion film
The composition of structure and each layer and thickness are as follows：
| Raw material forms | Thickness (μm) | |
| Ground floor | PE | 94 |
| The second layer | Binding agent | 2 |
| Third layer | PA | 2 |
| 4th layer | EVOH | 4 |
| Layer 5 | PA | 2 |
| Layer 6 | Binding agent | 2 |
| Layer 7 | PE | 94 |
2.4 embodiments 2
Preparing thickness using ReifenHouser SW2200 type Multi-layer co-extrusion film-blowing equipment is
48 μm of PE/PA/EVOH/PA/PE PP TYPE, adopts between wherein PE and PA
Bemis adhesive articulamentum.The die head temperature of PE layer is 220 DEG C, and hauling speed is
5.5～8m/min.The die head temperature of PA layer is 240 DEG C, and hauling speed is 8～12m/min.
The die head temperature of evoh layer is 240 DEG C, and hauling speed is 5～12m/min.This co-extrusion film
The composition of structure and each layer and thickness are as follows：
| Raw material forms | Thickness (μm) | |
| Ground floor | PE | 18 |
| The second layer | Binding agent | 2 |
| Third layer | PA | 2 |
| 4th layer | EVOH | 4 |
| Layer 5 | PA | 2 |
| Layer 6 | Binding agent | 2 |
| Layer 7 | PE | 18 |
The PET stream being 150 μm by thickness using Taiwan three summer jobs DL-S1300 type dry compound machine
Prolong the ground floor in film and above-mentioned PP TYPE pass through 750E two component polyurethane glue with
2.6g/m2Spread be bonded together, then ripening 48h at a temperature of 55 DEG C.Obtain
The gross thickness of composite membrane is 200 μm, and wherein the thickness of polyurethane binder is 2 μm.
3. performance test
Performance test is carried out to the composite membrane obtaining in above comparative example and embodiment.
3.1 boiling resistance
Composite membrane in embodiment 1 and comparative example 1 is prepared into 5 long 50mm width respectively
The sample of 13mm, takes out after being placed in decocting in water 30min in 95 DEG C of hot water and dries, observe each
The cosmetic variation of sample.
Fig. 1 shows before and after decocting in water the composite membrane sample (numbering is 9550) of embodiment 1 and right
The cosmetic variation of the composite membrane sample (being designated " blown film ") in ratio 1.As seen from Figure 1,
Before decocting in water, the composite membrane sample in embodiment 1 and comparative example 1 is respectively provided with more smooth
Outward appearance, but after decocting in water, before the composite membrane sample of embodiment 1 and decocting in water, difference is little,
Still smooth, and the composite membrane sample of comparative example 1 all there occurs different degrees of severe curl.
This curling can lead to for example using described film, cooked product is being packed and carried out Pasteur
Little ear or other irregular open defects are left on the packaging after sterilization, thus affecting client
Judgement for the quality of packaging product.
3.2 drawing and formings
Film in above example 1-2 and comparative example 1-2 is carried out according to the requirement of blister package
Drawing and forming, stretching depth is 25mm.Fig. 2 a and Fig. 2 b respectively illustrates by embodiment 2
The size of stretch zones in the moulded products obtaining with the composite membrane of comparative example 2, wherein Fig. 2 a
For 100*80mm, in Fig. 2 b, the size of stretch zones is 185*80mm.
From Fig. 2 a and 2b, the blister package being obtained by the composite membrane of embodiment 2 (numbering
For 9581) flatness and stiffness be significantly better than the bubble-cap that obtained by the composite membrane of comparative example 2
Packaging (being designated " blowing ").The composite membrane of comparative example 2 occurs in that after the stretch and subsides and not
Smooth.
Table 1 summarizes the test knot that the bubble-cap in Fig. 2 b is carried out with the thickness measure of corner bottom obtains
Fruit it is seen that according to the composite membrane of embodiments of the invention 1 and 2 uniformity in drawing and forming
Also it is significantly better than the composite membrane of comparative example 1 and 2.
1 four jiaos of base thickness degree test results of table
3.3 other performance tests
Following performance test has also been carried out to the composite membrane of embodiment 1-2 and comparative example 1-2.
Mist degree is tested：Carried out according to GB/T 2410-2008.
Tensile property is tested：Carried out according to GB/T 10004, wherein pull-off force sample is long
150mm, wide 15mm, test speed 200mm/min.
Heat sealability is tested：Carried out according to GB/T 10004.
PVvalue testing：Carried out according to GB/T 10004, wherein surface of steel plate keep smooth,
Smooth.
Oxygen transmission rate is tested：Carried out according to GB/T 10004, by heat cover towards low pressure during test
Side.
Permeability rate is tested：Carried out according to GB/T 10004, wherein test temperature is 38 DEG C, phase
To humidity 90%, by heat cover towards the low side of humidity during test.
The results are shown in Table 2 for above performance test.
Table 2 composite membrane performance test
From the data in table 2, according to the present invention, casting films and blown film are combined and obtain
Film transparency (haze value is less, and transparency is bigger), mechanical performance (Bark pull-off force,
Percentage elongation, coefficient of friction), heat seal strength, oxygen transmission rate, permeability rate aspect be superior to comparative example
There is in 1 and 2 the blown film of respective thickness.
3.4 film roll outward appearances
The composite membrane of embodiment 1 and 2 is produced in batches, obtains long 600M, wide 1M
Film roll.Even if it is observed that during the finished product of the casting films used in embodiment 1 and 2 is rolled up
Occur in that sudden and violent muscle, sudden and violent muscle is not all found according to the composite membrane finished product volume that the present invention is obtained, this can
Can be because the use of binding agent makes the thickness of film more uniform, compensate for casting films and/or blow
The existing problem in uneven thickness of plastic film itself.
Claims (12)
1. a kind of composite membrane is it is characterised in that described composite membrane comprises at least one of which casting films, at least one of which
Blown film and the adhesive phase being located between described casting films and described blown film.
2. composite membrane according to claim 1 it is characterised in that described casting films be selected from monolayer cast film,
Multi-layer co-extruded casting films and combinations thereof.
3. composite membrane according to claim 1 is it is characterised in that described casting films are by selected from polypropylene, poly-
In ethylene, polyester, EVA, polyamide, polrvinyl chloride, polyvinylidene chloride
Make for one or more.
4. composite membrane according to claim 1 is it is characterised in that described blown film is Multi-layer blown film
Film.
5. composite membrane according to claim 1 is it is characterised in that described blown film is by selected from polyethylene, poly-
Vinylacetate, polyamide, polrvinyl chloride, polypropylene, polyvinyl fluoride, polylactic acid, polyphenyl second
One or more of alkene, ethylene-vinyl alcohol copolymer are made.
6. composite membrane according to claim 1 is it is characterised in that described adhesive is selected from solvent-borne type bonding
Agent, adhesive for solvent-free use and combinations thereof.
7. composite membrane according to claim 1 is it is characterised in that described adhesive is selected from organosilan bonding
Agent, polyurethane binder, polyorganosiloxane adhesive and combinations thereof.
8. composite membrane according to claim 1 is it is characterised in that described casting films are selected from polypropylene casting
Film, polyester casting films and combinations thereof, described blown film is selected to be had the multi-layer co-extruded of following structure and blows
Plastic film：Polypropylene/polyamide/polypropylene, polyethylene/polyamide/polyethylene, polyethylene/polyamide/
Polypropylene, polypropylene/ethylene-ethenol copolymer/polypropylene, polyethylene/vinyl-vinyl alcohol copolymer
Thing/polyethylene, polyethylene/vinyl-ethenol copolymer/polypropylene, polypropylene/polyamide/ethylene-
Ethenol copolymer/polyamide/polypropylene, polyethylene/polyamide/ethylene-vinyl alcohol copolymer/polyamides
Amine/polyethylene, polyethylene/polyamide/ethylene-vinyl alcohol copolymer/polyamide/polypropylene and its group
Close, and described adhesive is dual-component polyurethane type adhesive for solvent-free use.
9. a kind of method preparing the composite membrane described in any one of claim 1-8, including by least one of which
Casting films and at least one of which blown film carry out compound step by binding agent.
10. the composite membrane described in any one of claim 1-8 is used for packaged food, medicine or medical device
Purposes.
11. purposes according to claim 10, wherein said food, medicine or medical device are through described
Carry out sterilization treatment after composite film packaging.
12. purposes according to claim 11, wherein said sterilization treatment includes pasteurized process.
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| CN201510466241.XA CN106393834B (en) | 2015-07-30 | 2015-07-30 | Composite membrane |
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| CN201510466241.XA CN106393834B (en) | 2015-07-30 | 2015-07-30 | Composite membrane |
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| CN108973289A (en) * | 2018-08-17 | 2018-12-11 | 江阴宝柏包装有限公司 | A kind of the pesticides packaging film and its preparation process of transparency high separation |
| CN109232926A (en) * | 2018-08-01 | 2019-01-18 | 广州唐斯科技有限公司 | A kind of antibacterial high-barrier food package film and its preparation method and application |
| CN110328947A (en) * | 2019-08-13 | 2019-10-15 | 马鞍山卓凡新材料科技有限公司 | A kind of preparation method of environment-protecting and non-poisonous beer plastic bag material |
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| CN106393834B (en) | 2021-06-29 |
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