CN109263162B - A kind of Biaxially oriented polypropylene precoating ground and its preparation method and application - Google Patents
A kind of Biaxially oriented polypropylene precoating ground and its preparation method and application Download PDFInfo
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- CN109263162B CN109263162B CN201810980475.XA CN201810980475A CN109263162B CN 109263162 B CN109263162 B CN 109263162B CN 201810980475 A CN201810980475 A CN 201810980475A CN 109263162 B CN109263162 B CN 109263162B
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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
- B32B27/06—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
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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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
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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
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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
- 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
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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
- 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
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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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
Abstract
The present invention relates to a kind of Biaxially oriented polypropylene precoating grounds and its preparation method and application, including polypropylene surface layer, polypropylene core and functional layer, it is prepared by surface layer acrylic resin, sandwich layer acrylic resin and functional layer resin by being coextruded stretch processes；The functional layer resin contains ethylene-vinyl acetate copolymer and ethylene-octene copolymer.Biaxially oriented polypropylene of the present invention precoats ground, it forms a functional layer by coextrusion on polypropylene film substrate, EVA hot-melt adhesive or aqueous adhesive can be directly coated with without coating silane coupling agent, the preparation process of pre-coating film can be simplified, the coating weight for reducing adhesive, improves the production efficiency of pre-coating film.
Description
Technical field
The present invention relates to a kind of film substrate and its preparation method and application, more particularly to a kind of paper overlay film with two-way
Oriented polypropylene precoats ground and its preparation method and application.
Background technique
Overlay film refers to and coats adhesive on a plastic film, with paper printed matter is heated, together with pressurization postadhesion, shape
At the processing technology of paper unification product.Printed matter through overlay film, due to one layer of thin and transparent plastic film more than surface, table
The smoother light in face to improve the glossiness and fastness of printed matter, while can also play waterproof, antifouling, wear-resisting, folding, resistance to
The effects of chemical attack.Popular environmentally friendly coating technique on current market, including hot composition process such as pre-coating film overlay film, without glue
Film overlay film, there are also aqueous dry coating process, traditional pre-coating film manufacturing process needs preparatory roller coating AC agent bottoming, then showering EVA hot melt
Glue, and aqueous dry coating process then need line roller coating water-based glue through drying tunnel dry moisture after hot pressing cover paper.
Precoating membrane process refers to that surface is coated with the plastic film of hot melt adhesive, is directly used in covering for paper printed matter by hot pressing
Film processing.Pre-coating film is usually made of substrate layer, priming coat and hot melt adhesive layer.The typically bidirectional stretched polyester of substrate layer
(BOPET) film or Biaxially oriented polypropylene (BOPP) film, with a thickness of 12~20 μm, wherein BOPP film has transparency
High, the features such as brightness is good, non-toxic and tasteless, water-fast, heat-resisting, inexpensive, soft, be comparatively ideal material in coating technique.
Priming coat is usually high molecular weight polyethyleneimine aqueous solution (AC agent)；Hot melt adhesive layer is usually ethylene-vinyl acetate (EVA)
Resin, with a thickness of 5~15 μm.Since the binding force in BOPP film surface coating EVA is poor, past need is gone in coating EVA
AC agent is coated in BOPP film.However, AC agent usually contains the organic solvents such as a large amount of methanol, ethyl alcohol, needed after coating
The solvent of AC agent is dried, priming coat could be formed on BOPP film surface.Such process is not only easy to produce inflammable and explosive
Security risk, meanwhile, drying AC agent generally require longer drying tunnel and heat, cause occupied space and energy consumption.Separately
Outside, common aqueous dry coating process also needs drying tunnel drying moisture content, more since glue solid content will usually reach 45~50%,
So baking process energy consumption is high, it is difficult to high efficiency overlay film.Simultaneously as water-based glue solid content is difficult to surmount 50%, so that drying
Bondline thickness after dry is restricted, and compound film quality equally receives limitation.
Summary of the invention
Based on this, it is an advantage of the invention to provide a kind of Biaxially oriented polypropylenes to precoat ground, passes through co-extrusion
A functional layer is formed on polypropylene film substrate out, can directly be coated with EVA hot-melt adhesive or aqueous without coating silane coupling agent
Adhesive can simplify the preparation process of pre-coating film, reduce the coating weight of adhesive, improve the production efficiency of pre-coating film.
It is a further object of the invention to provide the preparation methods of Biaxially oriented polypropylene precoating ground.
It is still another object of the present invention to provide a kind of biaxial tension polypropylene precoating films, by of the present invention
Biaxially oriented polypropylene precoating ground coating adhesive layer is prepared.
Technical scheme is as follows:
A kind of Biaxially oriented polypropylene precoating ground, including polypropylene surface layer, polypropylene core and functional layer, by surface layer
Acrylic resin, sandwich layer acrylic resin and functional layer resin are prepared by being coextruded stretch processes；The function
Ergosphere resin contains ethylene-vinyl acetate copolymer and ethylene-octene copolymer.
Biaxially oriented polypropylene of the present invention precoats ground, is formed on polypropylene film substrate by coextrusion
One functional layer can directly be coated with ethylene-vinyl acetate (EVA) hot melt adhesive or water-and acrylate without coating silane coupling agent
Adhesive simplifies the preparation process of pre-coating film, avoids security risk caused by organic solvent and film base in silane coupling agent
The discoloration problem of material Storage period can be improved production efficiency, reduce energy consumption, promote product quality.In addition, containing in functional layer
There is ethylene-vinyl acetate (EVA) ingredient for having hot melt adhesive performance, on the one hand, can be improved precoating ground and EVA hot-melt adhesive
Or the inter-layer bonding force between aqueous adhesive, improve its peel strength；It on the other hand, can be as the adhesive of pre-coating film
Composition of layer reduces the adhesive coating weight in pre-coating film preparation process, the application rate of adhesive is improved, to effectively improve pre-
The production efficiency of film；In another aspect, it can directly be coated with aqueous adhesive, aqueous adhesive wet coating amount is effectively saved, is dashed forward
The dry coating equipment of one's water breaks and limited space are obviously improved and aqueous dry cover efficiency.
Ethylene-vinyl acetate (EVA) hot melt adhesive in traditional pre-coating film, because it is poor with the matching of acrylic resin,
Binding force is weak, it is difficult to be formed a film by coextrusion and acrylic resin melt direct combination；In addition, as VA content improves, EVA heat
Thermal stability when melten gel squeezes out is deteriorated, and thermal-oxidative degradation is easy to happen when squeezing out through extruder, and acetic acid be precipitated of degrading can also
When corroding the equipment such as screw rod, and making biaxial tension after squeezing out, EVA hot-melt adhesive is also easy to happen adhesion, it is difficult to be wound, be solved
Volume.The present invention is passed through by one layer of functional layer being made of ethylene-vinyl acetate copolymer and ethylene-octene copolymer of setting
Ethylene-octene copolymer is added, can be improved the thermal stability of ethylene-vinyl acetate copolymer, it is avoided to send out in extrusion process
Raw thermal-oxidative degradation, while its matching between sandwich layer acrylic resin, binding force can also be improved, co-extrusion can be passed through
It forms a film out with acrylic resin melt direct combination.
Further, in the functional layer resin, the content of ethylene-vinyl acetate copolymer is 50~80wt%, second
Alkene-octene copolymer content is 20~50wt%.It is highly preferred that the content of ethylene-vinyl acetate copolymer be 60~
75wt%, the content of ethylene-octene copolymer are 25~40wt%.
If the content of ethylene-octene copolymer is too high, the glueability of ethylene-vinyl acetate copolymer can be reduced, is reduced
Precoat the inter-layer bonding force between ground and EVA hot-melt adhesive or aqueous adhesive；If the content of ethylene-octene copolymer is too low,
Then it is unfavorable for improving ethylene-vinyl acetate copolymer generated degradation, etching problem in screw rod, is also difficult to improve ethylene-
Inter-layer bonding force problem between acetate ethylene copolymer and sandwich layer acrylic resin.
Further, the VA content of the ethylene-vinyl acetate copolymer be 15~28wt%, melt index be 15~
25g/10min, fusing point are 80~90 DEG C.
The VA content of ethylene-vinyl acetate copolymer (EVA) is preferably 15~28wt%, if VA too high levels, are easy
It is unsmooth that thermal-oxidative degradation, stretching roll banding and receipts uncoiling occur in extrusion process, if VA content is too low, will lead to precoating ground and gluing
Inter-layer bonding force decline between oxidant layer；Its melt index is preferably 15~25g/10min, and poly- if melt index is excessively high
The binding force of allyl resin is deteriorated, and is easy in longitudinal stretching to be that roll banding and receipts uncoiling stick together, and influences the system for precoating ground
Standby and use will lead to extruder processing difficulties during coextrusion if melt index is too low.
Further, the octene content of the ethylene-octene copolymer is 10~20wt%, and melt index is 5~15g/
10min, fusing point are 95~120 DEG C.
The ethylene-octene copolymer for choosing the characteristic mainly considers its melt index, melt viscosity and contains ethylene-octene
The melt matching of the sandwich layer acrylic resin of copolymer, interlaminar strength, and wherein higher melting range optimizes it
With the modified inhibiting effect that mark is glued to biaxial tension function layer surface of EVA, while when balancing downstream post-processing again and showering
The peel strength contribution of paper overlay film after the matching or roller coating glue of EVA hot-melt adhesive.Although low melting point is conducive to aft-loaded airfoil performance,
But it is unfavorable for the improvement of functional surfaces trace, is also unfavorable for receiving uncoiling performance, especially in the performance of summer.It is deployed content and then more inclines
To in the smooth sexual balance for obtaining the functional surfaces trace under the premise of meeting aft-loaded airfoil performance, film and cutting process.
Further, the functional layer with a thickness of 1~2.5 μm, the polypropylene surface layer with a thickness of 1~2.5 μm, institute
The overall thickness for stating Biaxially oriented polypropylene precoating ground is 12~20 μm.
The thickness of functional layer is preferably controlled in 1~2.5 μm, if the thickness of functional layer is blocked up, will lead to precoating ground
Stiffness decline receives uncoiling difficulty, is easy to corrugate, and manufacturing cost is high；If the thickness of functional layer is too low, it is difficult to and showering
EVA hot-melt adhesive or glue generate effectively collaboration to provide good glueability, pre-coating film can not especially be effectively reduced
The coating weight of aqueous adhesive in preparation process, it is difficult to effectively save the wet coating amount of aqueous adhesive, it is difficult to improve aqueous dry cover
Efficiency and aqueous compound film quality.
Further, ethylene-octene copolymer, the ethylene-octene are also added in the sandwich layer acrylic resin
The content of copolymer is 0.5~4wt%.
By adding ethylene-octene copolymer in sandwich layer acrylic resin, polypropylene core and functional layer can be improved
Between inter-layer bonding force, and can make to precoat ground and keep good elasticity, be conducive to improve in the post-processing of pre-coating film overlay film
Embossing, crimping performance.The content of ethylene-octene copolymer is preferably 0.5~4wt%, if its too high levels, will lead to pre- linging
The stiffness of material declines；If its content is too low, the inter-layer bonding force that will lead between polypropylene core and functional layer is insufficient, even
There is functional layer to be easy to be drawn the defect of removing by adhesive tape lifting.
Further, antiblocking agent is also added in the surface layer acrylic resin.
Further, the polypropylene surface layer is extinction layer；The surface layer acrylic resin is high density polyethylene (HDPE)
(HDPE) and the blend of ene-propylene-butene terpolymer or high density polyethylene (HDPE) (HDPE) and ethylene-propylene it is total
The blend of polymers.
Further, the polypropylene surface layer is layer semi-dull；The surface layer acrylic resin is high-density polyethylene
The blend of alkene (HDPE) and homo-polypropylene.
Further, Biaxially oriented polypropylene precoating ground is handled through surface corona.
The preparation method of Biaxially oriented polypropylene precoating ground of the present invention, comprising the following steps: by surface layer polypropylene
Resin, sandwich layer acrylic resin and functional layer resin, are coextruded via extruder, converge after flow passage distributor in three layers of die head
It closes, then forms resin sheet after sharp cooling roll is cooling；Resin sheet is subjected to biaxial tension, obtains the biaxial stretching polypropylene
Alkene precoats ground.
Further, the extrusion temperature control of surface layer acrylic resin, sandwich layer acrylic resin is at 220~260 DEG C, function
At 200~240 DEG C, the temperature of sharp cooling roll is controlled at 20~40 DEG C for the extrusion temperature control of layer resin.
Further, the biaxial tension is flat membrane method step drawing.In longitudinal stretching process, the stretching of functional layer
Temperature control is at 50~80 DEG C, and at 100~130 DEG C, draw ratio is 4.5~5 for the draft temperature control on polypropylene surface layer；In transverse direction
In drawing process, draft temperature control is at 150~170 DEG C, and at 160~170 DEG C, draw ratio is 7~10 for setting temperature control.
Further, the biaxial tension is the synchro-draw of flat membrane method.Draft temperature controls the sizing at 100~160 DEG C
At 160~170 DEG C, total drawing ratio is 35~50 for temperature control.
A kind of biaxial tension polypropylene precoating film, in the functional layer table of Biaxially oriented polypropylene of the present invention precoating ground
Face coating ethylene-vinylacetate (EVA) hot melt adhesive or Waterborne acrylate adhesive are prepared.
Biaxial tension polypropylene precoating film of the present invention, by ethylene-vinyl acetate (EVA) hot melt adhesive or aqueous
Acrylate adhesive is applied directly to the function layer surface of the Biaxially oriented polypropylene precoating ground, and the two has good
Binding force not only avoids the use of silane coupling agent, moreover it is possible to improve the peel strength of pre-coating film, and can be reduced hot melt adhesive or water-base cement
The coating weight of stick improves the production efficiency of pre-coating film.
In the subsequent paper hot pressing overlay film processing technology of pre-coating film, functional layer resin and EVA hot-melt adhesive or aqueous acrylamide
The interaction such as melting, levelling and infiltration occurs between acid esters respectively, a gluing oxidant layer is collectively formed in the two, to improve pre-
The overlay film and aft-loaded airfoil performance of film.
Specific embodiment
Embodiment one: Biaxially oriented polypropylene precoating ground of the present invention is prepared
1, prepare surface layer acrylic resin
Take the acrylic resin that isotacticity is 95%, melt index is 2.5g/10min (purchased from Sinopec respectively
Limited liability company) and AB6018CPP resist blocking and that masterbatch (be purchased from Suzhou Constab Engineering Plastic Co., Ltd., titanium dioxide
Silicone content is 5wt%, copolymerization carrier), it is uniformly mixed according to the weight ratio of 97:3, obtains surface layer acrylic resin.
2, prepare sandwich layer acrylic resin
Take the acrylic resin that isotacticity is 95%, melt index is 2.5g/10min (purchased from Sinopec respectively
Limited liability company) and octene content is 13wt%, melt index 5g/10min, fusing point are 110 DEG C ethylene-octene
Copolymer uniformly mixes according to the weight ratio of 98:2, obtains sandwich layer acrylic resin.
3, preparatory function layer resin
The ethene-vinyl acetate that taking VA content respectively is 20wt%, melt index 15g/10min, fusing point are 85 DEG C is total
Polymers and octene content are 13wt%, and melt index 5g/10min, fusing point is 110 DEG C of ethylene-octene copolymer, are pressed
It is uniformly mixed according to the weight ratio of 70:30, obtains functional layer resin.
4, preparation method
By surface layer acrylic resin (A layers), sandwich layer acrylic resin (B layers) and functional layer resin (C layers), extruder is introduced
It is coextruded, wherein at 250 DEG C, C layers of extrusion temperature is controlled at 220 DEG C, through runner for A layers and B layers of extrusion temperature control
Converge at T shape die head after distributor, forms the resin melt of A/B/C structure, then the sharp cooling roll cooling through 30 DEG C, tape casting
Afterwards, the resin sheet of A/B/C structure is formed.
Resin sheet is introduced into the longitudinal tensile fixture in biaxial tension equipment, C layers of draft temperature control is at 60 DEG C, A
The draft temperature of layer controls 120 DEG C, and draw ratio is 5 times；Then transversal stretching device is introduced, after crossing 160 DEG C of preheatings, at 165 DEG C
It is lower to stretch 8 times, then be formed at 165 DEG C.
Then carry out wind and drench chilling, and through surface corona processing, winding, ageing treatment, cutting, packaging, obtain described in
Biaxially oriented polypropylene precoats ground.Wherein, surface layer with a thickness of 1 μm, sandwich layer with a thickness of 16.5 μm, functional layer with a thickness of
2.5μm。
Embodiment two: Biaxially oriented polypropylene precoating ground of the present invention is prepared
1, prepare surface layer acrylic resin
Taking FM500N delustring masterbatch (is high density polyethylene (HDPE) and ethylene-purchased from the superior high molecular material Co., Ltd in Jiangsu
The blend of propylene copolymer), as surface layer acrylic resin.
2, prepare sandwich layer acrylic resin
Take the acrylic resin that isotacticity is 95%, melt index is 2.5g/10min (purchased from Sinopec respectively
Limited liability company) and octene content is 20wt%, melt index 15g/10min, fusing point are 95 DEG C ethylene-octene
Copolymer uniformly mixes according to the weight ratio of 96:4, obtains sandwich layer acrylic resin.
3, preparatory function layer resin
The ethene-vinyl acetate that taking VA content respectively is 20wt%, melt index 18g/10min, fusing point are 90 DEG C is total
The ethylene-octene copolymer that polymers and octene content are 20wt%, melt index 15g/10min, fusing point are 95 DEG C, is pressed
It is uniformly mixed according to the weight ratio of 50:50, obtains functional layer resin.
4, preparation method
By surface layer acrylic resin (A layers), sandwich layer acrylic resin (B layers) and functional layer resin (C layers), extruder is introduced
It is coextruded, wherein at 250 DEG C, C layers of extrusion temperature is controlled at 220 DEG C, through runner for A layers and B layers of extrusion temperature control
Converge at T shape die head after distributor, forms the resin melt of A/B/C structure, then the sharp cooling roll cooling through 30 DEG C, tape casting
Afterwards, the resin sheet of A/B/C structure is formed.
Resin sheet is introduced into the longitudinal tensile fixture in biaxial tension equipment, C layers of draft temperature control is at 60 DEG C, A
The draft temperature of layer controls 120 DEG C, and draw ratio is 5 times；Then transversal stretching device is introduced, after crossing 160 DEG C of preheatings, at 165 DEG C
It is lower to stretch 8 times, then be formed at 165 DEG C.
Then carry out wind and drench chilling, and through surface corona processing, winding, ageing treatment, cutting, packaging, obtain described in
Biaxially oriented polypropylene precoats ground.Wherein, surface layer with a thickness of 2.5 μm, sandwich layer with a thickness of 10.5 μm, the thickness of functional layer
It is 2 μm.
Embodiment three: Biaxially oriented polypropylene precoating ground of the present invention is prepared
1, prepare surface layer acrylic resin
Taking FM505 masterbatch semi-dull (is high density polyethylene (HDPE) and homopolymerization purchased from the superior high molecular material Co., Ltd in Jiangsu
The blend of propylene), as surface layer acrylic resin.
2, prepare sandwich layer acrylic resin
Take the acrylic resin that isotacticity is 95%, melt index is 2.5g/10min (purchased from Sinopec respectively
Limited liability company) and octene content is 10wt%, melt index 10g/10min, fusing point are 120 DEG C ethylene-octene
Copolymer uniformly mixes according to the weight ratio of 99:1, obtains sandwich layer acrylic resin.
3, preparatory function layer resin
The ethene-vinyl acetate that taking VA content respectively is 15wt%, melt index 15g/10min, fusing point are 80 DEG C is total
The ethylene-octene copolymer that polymers and octene content are 10wt%, melt index 10g/10min, fusing point are 120 DEG C, is pressed
It is uniformly mixed according to the weight ratio of 80:20, obtains functional layer resin.
4, preparation method
By surface layer acrylic resin (A layers), sandwich layer acrylic resin (B layers) and functional layer resin (C layers), extruder is introduced
It is coextruded, wherein at 250 DEG C, C layers of extrusion temperature is controlled at 220 DEG C, through runner for A layers and B layers of extrusion temperature control
Converge at T shape die head after distributor, forms the resin melt of A/B/C structure, then the sharp cooling roll cooling through 30 DEG C, tape casting
Afterwards, the resin sheet of A/B/C structure is formed.
Resin sheet is introduced into the longitudinal tensile fixture in biaxial tension equipment, C layers of draft temperature control is at 60 DEG C, A
The draft temperature of layer controls 120 DEG C, and draw ratio is 5 times；Then transversal stretching device is introduced, after crossing 160 DEG C of preheatings, at 165 DEG C
It is lower to stretch 8 times, then be formed at 165 DEG C.
Then carry out wind and drench chilling, and through surface corona processing, winding, ageing treatment, cutting, packaging, obtain described in
Biaxially oriented polypropylene precoats ground.Wherein, surface layer with a thickness of 1.8 μm, sandwich layer with a thickness of 9.2 μm, the thickness of functional layer
It is 1 μm.
Example IV: biaxial tension polypropylene precoating film of the present invention is prepared
Prepare hot melt adhesive: the ethyl vinyl acetate that taking VA content is 20wt%, melt index 20g/10min, fusing point are 85 DEG C
Vinyl acetate (EVA) hot melt adhesive.
Biaxially oriented polypropylene obtained by one of Example one to three precoats ground, in the table of its functional layer
Face is coated with above-mentioned ethylene-vinyl acetate (EVA) hot melt adhesive, and coating thickness is 5 μm, arrives after sided corona treatment described
Biaxial tension polypropylene precoating film.
Embodiment five: biaxial tension polypropylene precoating film of the present invention is prepared
Biaxially oriented polypropylene obtained by one of Example one to three precoats ground, in the table of its functional layer
Face is coated with Waterborne acrylate adhesive aqueous solution, and wet coating amount is 8g/m2, glue-line is described to get arriving with a thickness of 4 μm after drying
Online paper overlay film biaxial tension polypropylene precoating film.
Comparative example one:
Prepare surface layer acrylic resin: take FM505 masterbatch semi-dull (purchased from the superior high molecular material Co., Ltd in Jiangsu,
For the blend of high density polyethylene (HDPE) and homo-polypropylene), as surface layer acrylic resin.
Prepare sandwich layer acrylic resin: taking the polypropylene tree that isotacticity is 95%, melt index is 2.5g/10min respectively
Rouge (being purchased from Sinopec Group) and octene content are 10wt%, melt index 10g/10min, melt
The ethylene-octene copolymer that point is 120 DEG C, uniformly mixes according to the weight ratio of 99:1, obtains sandwich layer acrylic resin.
Preparatory function layer resin: the ethylene-that taking VA content is 20wt%, melt index 15g/10min, fusing point are 85 DEG C
Acetate ethylene copolymer, as functional layer resin.
By surface layer acrylic resin (A layers), sandwich layer acrylic resin (B layers) and functional layer resin (C layers), extruder is introduced
It is coextruded, wherein at 250 DEG C, C layers of extrusion temperature is controlled at 220 DEG C, through runner for A layers and B layers of extrusion temperature control
Converge at T shape die head after distributor, forms the resin melt of A/B/C structure, then the sharp cooling roll cooling through 30 DEG C, tape casting
Afterwards, the resin sheet of A/B/C structure is formed.
Resin sheet is introduced into the longitudinal tensile fixture in biaxial tension equipment, C layers of draft temperature control is at 60 DEG C, A
The draft temperature of layer controls 120 DEG C, and draw ratio is 5 times；Then transversal stretching device is introduced, after crossing 160 DEG C of preheatings, at 165 DEG C
It is lower to stretch 8 times, then be formed at 165 DEG C.
Then carry out wind and drench chilling, and through surface corona processing, winding, ageing treatment, cutting, packaging, obtain described in
Biaxially oriented polypropylene precoats ground.Wherein, surface layer with a thickness of 1.8 μm, sandwich layer with a thickness of 9.2 μm, the thickness of functional layer
It is 1.5 μm.
Comparative example two:
Prepare surface layer acrylic resin: take FM505 masterbatch semi-dull (purchased from the superior high molecular material Co., Ltd in Jiangsu,
For the blend of high density polyethylene (HDPE) and homo-polypropylene), as surface layer acrylic resin.
Prepare sandwich layer acrylic resin: taking the polypropylene tree that isotacticity is 95%, melt index is 2.5g/10min respectively
Rouge (being purchased from Sinopec Group) and octene content are 10wt%, melt index 10g/10min, melt
The ethylene-octene copolymer that point is 120 DEG C, uniformly mixes according to the weight ratio of 99:1, obtains sandwich layer acrylic resin.
Preparatory function layer resin: the second that taking octene content is 13wt%, melt index 5g/10min, fusing point are 110 DEG C
Alkene-octene copolymer, as functional layer resin.
By surface layer acrylic resin (A layers), sandwich layer acrylic resin (B layers) and functional layer resin (C layers), extruder is introduced
It is coextruded, wherein at 250 DEG C, C layers of extrusion temperature is controlled at 220 DEG C, through runner for A layers and B layers of extrusion temperature control
Converge at T shape die head after distributor, forms the resin melt of A/B/C structure, then the sharp cooling roll cooling through 30 DEG C, tape casting
Afterwards, the resin sheet of A/B/C structure is formed.
Resin sheet is introduced into the longitudinal tensile fixture in biaxial tension equipment, C layers of draft temperature control is at 60 DEG C, A
The draft temperature of layer controls 120 DEG C, and draw ratio is 5 times；Then transversal stretching device is introduced, after crossing 160 DEG C of preheatings, at 165 DEG C
It is lower to stretch 8 times, then be formed at 165 DEG C.
Then carry out wind and drench chilling, and through surface corona processing, winding, ageing treatment, cutting, packaging, obtain described in
Biaxially oriented polypropylene precoats ground.Wherein, surface layer with a thickness of 1.8 μm, sandwich layer with a thickness of 9.2 μm, the thickness of functional layer
It is 1.5 μm.
Comparative example three:
It is coated with Waterborne acrylate adhesive aqueous solution in the corona surface of BOPP film, wet coating amount is 8g/m2, glue after drying
Layer obtains BOPP pre-coating film with a thickness of 4 μm.
Comparative example four:
AC agent polyethyleneimine (PEI) is precoated in BOPP film corona surface, after the dry moisture of drying tunnel, showering EVA hot melt
Glue, synchronous to carry out ozone treatment, bondline thickness is 5 μm, and glue-line obtains BOPP pre-coating film through sided corona treatment.
Performance test:
Respectively to obtained by the precoating of Biaxially oriented polypropylene obtained by embodiment one to three ground, example IV to five
Biaxially oriented polypropylene obtained by biaxial tension polypropylene precoating film and comparative example one to two precoats ground, comparative example three
To biaxial tension polypropylene precoating film obtained by four, processing performance test is carried out respectively, test result is as follows shown in table 1.
1 processing performance test result of table
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.
Claims (8)
1. a kind of Biaxially oriented polypropylene precoats ground, it is characterised in that: including polypropylene surface layer, polypropylene core and function
Layer passes through coextrusion stretch processes preparation by surface layer acrylic resin, sandwich layer acrylic resin and functional layer resin
At；The functional layer resin contains ethylene-vinyl acetate copolymer and ethylene-octene copolymer, wherein ethene-vinyl acetate
The content of copolymer is 50~80wt%, and the content of ethylene-octene copolymer is 20~50wt%；The ethene-vinyl acetate
The VA content of copolymer is 15~28wt%, and melt index is 15~25g/10min, and fusing point is 80~90 DEG C；The ethylene-is pungent
The octene content of alkene copolymer is 10~20wt%, and melt index is 5~15g/10min, and fusing point is 95~120 DEG C；Described
The ethylene-octene copolymer for being also 0.5~4wt% added with content in sandwich layer acrylic resin.
2. Biaxially oriented polypropylene according to claim 1 precoats ground, it is characterised in that: the functional layer with a thickness of
1~2.5 μm.
3. to 2, one of them described Biaxially oriented polypropylene precoats ground according to claim 1, it is characterised in that: described
Antiblocking agent is also added in the acrylic resin of surface layer；Alternatively, the polypropylene surface layer is extinction layer or layer semi-dull.
4. to 2, one of them described Biaxially oriented polypropylene precoats ground according to claim 1, it is characterised in that: described
Biaxially oriented polypropylene precoating ground is handled through surface corona.
5. Biaxially oriented polypropylene according to claim 3 precoats ground, it is characterised in that: the biaxial stretching polypropylene
Alkene precoating ground is handled through surface corona.
6. the preparation method of the precoating ground of Biaxially oriented polypropylene described in claim 1, comprising the following steps: by surface layer polypropylene
Resin, sandwich layer acrylic resin and functional layer resin, are coextruded via extruder, converge after flow passage distributor in three layers of die head
It closes, then forms resin sheet after sharp cooling roll is cooling；Resin sheet is subjected to biaxial tension, obtains the biaxial stretching polypropylene
Alkene precoats ground.
7. preparation method according to claim 6, it is characterised in that: surface layer acrylic resin, sandwich layer acrylic resin
Extrusion temperature control is at 220~260 DEG C, and the extrusion temperature control of functional layer resin is at 200~240 DEG C, the temperature control of sharp cooling roll
System is at 20~40 DEG C；The biaxial tension is flat membrane method step drawing or flat membrane method synchro-draw.
8. a kind of biaxial tension polypropylene precoating film, it is characterised in that: the pre- linging of the Biaxially oriented polypropylene described in claim 1
The function layer surface coating ethylene-vinylacetate hot melt adhesive or Waterborne acrylate adhesive of material are prepared.
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| CN109705765B (en) * | 2019-01-31 | 2023-11-28 | 开平市齐裕胶粘制品科技有限公司 | Lining paper-free CPP cold mounting film and preparation method thereof |
| CN111909456A (en) * | 2020-08-20 | 2020-11-10 | 福融辉实业（江苏）有限公司 | Environment-friendly degradable extinction film |
| CN113733700A (en) * | 2021-09-06 | 2021-12-03 | 山东顺凯复合材料有限公司 | Anaerobic biodegradable BOPP (biaxially-oriented Polypropylene) precoating film without primer and preparation method thereof |
| CN114536919B (en) * | 2022-02-10 | 2023-12-01 | 云阳金田塑业有限公司 | Polypropylene thermal composite material and preparation method and application thereof |
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| JPH07246687A (en) * | 1994-03-10 | 1995-09-26 | Nimura Kagaku Kogyo Kk | Composite biaxially stretched polypropylene based film having excellent adhesiveness |
| CN102863919A (en) * | 2011-07-04 | 2013-01-09 | 孟孟 | Polypropylene biaxially oriented film without primary coat and preparation method thereof |
| CN107498966A (en) * | 2017-09-18 | 2017-12-22 | 广东德冠薄膜新材料股份有限公司 | A kind of bidirectional stretching polypropylene film base material and its preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07246687A (en) * | 1994-03-10 | 1995-09-26 | Nimura Kagaku Kogyo Kk | Composite biaxially stretched polypropylene based film having excellent adhesiveness |
| CN102863919A (en) * | 2011-07-04 | 2013-01-09 | 孟孟 | Polypropylene biaxially oriented film without primary coat and preparation method thereof |
| CN107498966A (en) * | 2017-09-18 | 2017-12-22 | 广东德冠薄膜新材料股份有限公司 | A kind of bidirectional stretching polypropylene film base material and its preparation method and application |
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