CN107498966A - A kind of bidirectional stretching polypropylene film base material and its preparation method and application - Google Patents
A kind of bidirectional stretching polypropylene film base material and its preparation method and application Download PDFInfo
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- CN107498966A CN107498966A CN201710842363.3A CN201710842363A CN107498966A CN 107498966 A CN107498966 A CN 107498966A CN 201710842363 A CN201710842363 A CN 201710842363A CN 107498966 A CN107498966 A CN 107498966A
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- layer resin
- base material
- film base
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- polypropylene film
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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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention relates to a kind of bidirectional stretching polypropylene film base material and its preparation method and application.Described bidirectional stretching polypropylene film base material, it is to be prepared by top layer resin, sandwich layer resin and functional layer resin through coextrusion and biaxial tension；Described top layer resin, sandwich layer resin are polypropylene；Described functional layer resin is ethene hexene copolymer or POE.Bidirectional stretching polypropylene film base material of the present invention, ethene hexene copolymer or POE functional layer are formed by being coextruded on polypropylene core, the functional layer has good affinity with EVA hot-melt adhesive, silane coupling agent need not be coated, directly EVA hot-melt adhesive can be coated securely on a functional, avoid in pre-coating film preparation technology using the VOCs discharges caused by silane coupling agent and potential safety hazard, also pre-coating film Storage period discoloration problem caused by avoiding silane coupling agent, and the peel strength of EVA hot-melt adhesive layer in obtained pre-coating film can be improved.
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 Biaxially oriented polypropylene
Film substrate and its preparation method and application.
Background technology
Overlay film, refer to coat adhesive on a plastic film, together with, pressurization postadhesion heated with paper printed matter, shape
Into the process technology of paper unification product.Printed matter through overlay film, due to one layer of thin, transparent plastic sheeting more than surface, table
The smoother light in face, so as to improve the glossiness of printed matter and fastness, while waterproof, antifouling, wear-resisting, resistance to folding, resistance to can also be played
Chemical attack etc. acts on.
Precoating membrane process refers to that surface is coated with the plastic sheeting of PUR, and covering for paper printed matter is directly used in by hot pressing
Film is processed.Pre-coating film is generally made up 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, its thickness are 12~20 μm, and wherein BOPP film has transparency
High, the features such as brightness is good, nonpoisonous and tasteless, water-fast, heat-resisting, inexpensive, soft texture, be comparatively ideal material in coating technique.
Priming coat is usually the high molecular weight polyethyleneimine aqueous solution (AC agent)；Hot melt adhesive layer is usually ethylene-vinyl acetate (EVA)
Resin, its thickness are 5~15 μm.Because the adhesion in BOPP film surface coating EVA is poor, past need is gone in coating EVA
AC agent is coated with BOPP film.However, AC agent, which usually contains substantial amounts of water and methanol etc., belongs to organic volatile (VOCs)
The restricted organic solvent of environmental regulation, needed the drying of the solvent of AC agent after coating, bottom could be formed on BOPP film surface
Coating, such process not only easily produce inflammable and explosive potential safety hazard, and drying AC agent generally requires longer drying tunnel and heat
Amount, also result in space-consuming and energy consumption.In addition, primary coat AC agent typically results in pre-coating film there is film roll change in Storage period
Yellow, influence the overlay film aberration and presentation quality of pre-coating film.
The content of the invention
Based on this, it is an advantage of the invention to provide a kind of bidirectional stretching polypropylene film base material, and it has with EVA
There is good adhesion, without coating silane coupling agent, can directly be coated with EVA hot-melt adhesive layer.
It is a further object of the invention to provide the preparation method of the bidirectional stretching polypropylene film base material.
It is still another object of the present invention to provide a kind of biaxial tension polypropylene precoating film, it is by of the present invention
Bidirectional stretching polypropylene film coated substrate PUR is prepared.
A kind of bidirectional stretching polypropylene film base material, it is by top layer resin, sandwich layer resin and functional layer resin through coextrusion
It is prepared with biaxial tension；Described top layer resin, sandwich layer resin are polypropylene；Described functional layer resin be ethene-oneself
Alkene copolymer or ethylene-octene copolymer.
Bidirectional stretching polypropylene film base material of the present invention, by be coextruded on polypropylene core formed ethene-
Hexene copolymer or ethylene-octene copolymer functional layer, the functional layer have good with ethylene-vinyl acetate (EVA) PUR
Good affinity, EVA hot-melt adhesive without coating silane coupling agent, can be coated directly on a functional, eliminate primary coat securely
Process, avoid in pre-coating film preparation technology using the VOCs discharges caused by silane coupling agent and potential safety hazard, also avoid primary coat
Pre-coating film Storage period discoloration problem caused by agent, and the peel strength of EVA hot-melt adhesive layer in obtained pre-coating film can be improved.
Further, in described ethylene-hexene co-polymers, the content of hexene is 5~15wt%, more preferably 8~
15wt%；In described ethylene-octene copolymer, the content of octene is 5~15wt%, more preferably 8~15wt%.Pass through control
The content of hexene/octene in copolymer processed, can on the basis of melting behaviour etc. of film substrate is ensured, improve functional layer with
Compatibility and affinity between EVA hot-melt adhesive；If the too high levels of hexene/octene, the reduction of copolymer fusing point can be caused, drawn
Occur the bad phenomenons such as roll banding in stretching process；If the content of hexene/octene is too low, functional layer and EVA compatibility can be caused
Reduce, EVA hot-melt adhesive layer, which is easily peeled off, to come off.
Further, described ethylene-hexene co-polymers, ethylene-octene copolymer, its melt index are 5~15g/
10min.It is 5~15g/10min by the melt index control of functional layer copolymer, it is possible to increase functional layer copolymer gathers with sandwich layer
Matching, adhesion between propylene, it is ensured that functional layer copolymer and sandwich layer polypropylene during coextrusion can uniformly into
Type, the consistency of thickness in drawing process, and improve the uncoiling smoothness after film substrate winding；And post-processing EVA can be improved
Hot melt adhesive layer is coated in the curtain coating performance of function layer surface, improves the adhesion between functional layer and EVA hot-melt adhesive layer.
Further, described ethylene-hexene co-polymers, ethylene-octene copolymer, its dart impact breakage quality are 70
~90 grams (method according to standard GB/T/T 9639.1 (A methods) is measured).The dart impact of functional layer copolymer is broken
It is 70~90 grams to damage quality control, can improve the toughness and deflection of film substrate simultaneously, overcome polypropylene film deflection big, crisp
Property it is big the defects of, to meet coextrusion biaxial tension and post-processing to the performance requirement of film substrate.
Further, the thickness of described functional layer resin is 0.5~2.0 μm.If the thickness of functional layer is too small, can cause
Adhesion deficiency between EVA hot-melt adhesive layer and functional layer, EVA hot-melt adhesive layer, which is easily peeled off, to come off；If the thickness mistake of functional layer
Greatly, then the deflection of film substrate can be caused to decline, influence the properties for follow of film substrate.
Further, described sandwich layer resin contains ethylene-hexene co-polymers or ethylene-octene copolymer.Described second
Alkene-hexene copolymer or ethylene-hexene co-polymers or ethylene-octene copolymer that ethylene-octene copolymer is the functional layer.
By adding ethylene-hexene co-polymers or ethylene-octene copolymer in polypropylene core, it is possible to increase the work(of this film substrate
Matching, adhesion between ergosphere and sandwich layer, the peel strength of film substrate is improved, improve the toughness of polypropylene film.
Further, the ethylene-hexene co-polymers or ethylene-octene that described sandwich layer resin contains 0.5~2.0wt% are total to
Polymers.If the content of ethylene-hexene co-polymers or ethylene-octene copolymer is too low, the knot between functional layer and sandwich layer can be caused
It is insufficient with joint efforts, it is easily peeled off and comes off between functional layer and sandwich layer；If its too high levels, under the deflection that film substrate can be caused
Drop, the curtain coating performance of post-processing EVA hot-melt adhesive coating is influenceed, influence the performances such as deflection, the planarization of gained pre-coating film.
Further, described sandwich layer resin contains 0.1~0.3wt% antistatic additive.
Further, described top layer resin contains antiblocking agent.
Further, described top layer resin is delustring material, i.e. high density polyethylene (HDPE) (HDPE) and polyacrylic blend.
The preparation method of bidirectional stretching polypropylene film base material of the present invention, comprises the following steps：By top layer resin,
Sandwich layer resin, functional layer resin, are coextruded via extruder, converge through flow passage distributor after in three layers of die head, then through Quench
Thin-film sheet is formed after roller cooling；After thin-film sheet is heated, longitudinal stretching and cross directional stretch are carried out, obtains described two-way drawing
Polypropylene stretched film base material.
Further, the extrusion temperature control of top layer resin, sandwich layer resin is at 230~260 DEG C, the extrusion of functional layer resin
Temperature control is at 210~260 DEG C, and the temperature control of sharp cooling roll is at 20~40 DEG C, in longitudinal stretching process, top layer resin, core
At 110~140 DEG C, the draft temperature control of functional layer resin is in 90~120 DEG C, draw ratio for the draft temperature control of layer resin
4.5~5；During cross directional stretch, the draft temperature of top layer resin, sandwich layer resin and functional layer resin controls 150~
170 DEG C, at 160~170 DEG C, draw ratio is 7~10 for setting temperature control.
Further, described biaxial tension is synchro-draw.Wherein, draft temperature control is at 90~165 DEG C, sizing temperature
At 160~170 DEG C, total drawing ratio is 30~50 for degree control.
In this preparation method, the preheating of functional layer resin, draft temperature are controlled at 90~120 DEG C, if draft temperature mistake
Height, the problems such as roll banding can be caused；If draft temperature is too low, the problems such as causing to stretch bad or rupture of membranes.
A kind of biaxial tension polypropylene precoating film, in the functional layer of bidirectional stretching polypropylene film base material of the present invention
Surface, coating ethylene-vinylacetate (EVA) PUR are prepared.
Biaxial tension polypropylene precoating film of the present invention, directly coated by ethylene-vinyl acetate (EVA) PUR
In the function layer surface of described bidirectional stretching polypropylene film base material, both have good adhesion, not only avoid bottom
The use of paint, moreover it is possible to improve the peel strength of hot melt adhesive layer in pre-coating film.
Embodiment
Embodiment one：The preparation of bidirectional stretching polypropylene film base material
Preparatory function layer resin：Take the ethylene-hexene co-polymers that ahexene content is 5wt%, melt index is 15g/10min
Resin, its dart impact breakage quality is determined as 70 grams according to standard GB/T/T 9639.1 (A methods), as functional layer resin.
Prepare sandwich layer resin：Taking 98wt%T36F acrylic resins, (manufacturer is the limited public affairs of Sinopec's share
Department, melt index 3.0g/10min) and 2wt% ethylene-hexene co-polymers (ahexene content 5wt%, melt index are
15g/10min, dart impact breakage quality are 70 grams), both are well mixed, obtains sandwich layer resin.
Prepare top layer resin：Taking 98.5wt%T36F acrylic resins, (manufacturer is that Sinopec's share is limited
Company, melt index 3.0g/10min), and (manufacturer is that Suzhou Constant is general to 1.5wt%AB6019PP resist blocking and thats masterbatch
Engineering plastics Co., Ltd), both are well mixed, obtains top layer resin.
By top layer resin (A layers), sandwich layer resin (B layers) and the extruded machine coextrusion of functional layer resin (C layers), A layers and B layers
Extrusion temperature control at 230 DEG C, the extrusion temperature of C layers is controlled at 210 DEG C, is converged through flow passage distributor at three layers of die head
Close, form the resin melt of A/B/C structures, then after 30 DEG C of sharp cooling roll cooling, form the thin-film sheet of A/B/C structures；Will
The draft temperature of the longitudinal tensile fixture that thin-film sheet is introduced into biaxial tension equipment, A layers and B layers is controlled at 110 DEG C, C layers
At 90 DEG C, draw ratio is 4.5 times for draft temperature control；Then transversal stretching device is introduced, after 160 DEG C of preheatings, at 165 DEG C
Lower 8 times of stretching, then shaped at 160 DEG C, room temperature is subsequently cooled to, obtains described bidirectional stretching polypropylene film base material.
Embodiment two：The preparation of bidirectional stretching polypropylene film base material
Preparatory function layer resin：The ethylene-octene that octene content is 15wt%, melt index is 10g/10min is taken to be copolymerized
Resin, its dart impact breakage quality is determined as 90 grams according to standard GB/T/T 9639.1 (A methods), as functional layer tree
Fat.
Prepare sandwich layer resin：Taking 99.3wt%T36F acrylic resins, (manufacturer is that Sinopec's share is limited
Company, melt index 3.0g/10min), (octene content 15wt%, melt index are 0.5wt% ethylene-octene copolymers
10g/10min, dart impact breakage quality are 90 grams) and 0.2wt% antistatic additive ASD (manufacturer be Guangdong close sincereization
Work Co., Ltd), three is uniformly mixed, obtains sandwich layer resin.
Prepare top layer resin：Taking FM630H delustrings masterbatch, (manufacturer is the superior plastic cement Co., Ltd in Jiangyin, for containing HDPE
With polyacrylic blend), as top layer resin.
By top layer resin (A layers), sandwich layer resin (B layers) and the extruded machine coextrusion of functional layer resin (C layers), A layers and B layers
Extrusion temperature control at 250 DEG C, the extrusion temperature of C layers is controlled at 240 DEG C, is converged through flow passage distributor at three layers of die head
Close, form the resin melt of A/B/C structures, then after 30 DEG C of sharp cooling roll cooling, form the thin-film sheet of A/B/C structures；Will
The draft temperature of the longitudinal tensile fixture that thin-film sheet is introduced into biaxial tension equipment, A layers and B layers is controlled at 120 DEG C, C layers
At 100 DEG C, draw ratio is 5 times for draft temperature control；Then transversal stretching device is introduced, after 165 DEG C of preheatings, at 170 DEG C
Lower 8 times of stretching, then shaped at 165 DEG C, room temperature is subsequently cooled to, obtains described bidirectional stretching polypropylene film base material.
Embodiment three：The preparation of bidirectional stretching polypropylene film base material
Preparatory function layer resin：Take the ethylene-hexene co-polymers that ahexene content is 5wt%, melt index is 5g/10min
Resin, its dart impact breakage quality is determined as 80 grams according to standard GB/T/T 9639.1 (A methods), as functional layer resin.
Prepare sandwich layer resin：Taking 99wt%T36F acrylic resins, (manufacturer is the limited public affairs of Sinopec's share
Department, melt index 3.0g/10min) and 1wt% ethylene-hexene co-polymers (ahexene content 5wt%, melt index are
5g/10min, dart impact breakage quality are 80 grams), both are well mixed, obtains sandwich layer resin.
Prepare top layer resin：Taking 98.5wt%T36F acrylic resins, (manufacturer is that Sinopec's share is limited
Company, melt index 3.0g/10min), and (manufacturer is that Suzhou Constant is general to 1.5wt%AB6019PP resist blocking and thats masterbatch
Engineering plastics Co., Ltd), both are uniformly mixed, obtains top layer resin.
By top layer resin (A layers), sandwich layer resin (B layers) and the extruded machine coextrusion of functional layer resin (C layers), A layers and B layers
Extrusion temperature control at 230 DEG C, the extrusion temperature of C layers is controlled at 260 DEG C, is converged through flow passage distributor at three layers of die head
Close, form the resin melt of A/B/C structures, then after 30 DEG C of sharp cooling roll cooling, form the thin-film sheet of A/B/C structures；Will
The draft temperature of the longitudinal tensile fixture that thin-film sheet is introduced into biaxial tension equipment, A layers and B layers is controlled at 110 DEG C, C layers
At 90 DEG C, draw ratio is 4.5 times for draft temperature control；Then transversal stretching device is introduced, after 160 DEG C of preheatings, at 165 DEG C
Lower 8 times of stretching, then shaped at 160 DEG C, room temperature is subsequently cooled to, obtains described bidirectional stretching polypropylene film base material.
Example IV：The preparation of biaxial tension polypropylene precoating film
Prepare PUR：Take the ethylene-vinyl acetate (EVA) that VA contents are 18wt%, melt index is 15g/10min
PUR.
Bidirectional stretching polypropylene film base material produced by the present invention is taken, above-mentioned EVA hot melts are coated with the surface of its functional layer
Glue, coating thickness is 8 μm, after sided corona treatment, obtains described biaxial tension polypropylene precoating film.
Splitting test is carried out using 3M sticking tapes after coating, sees whether ethylene-vinyl acetate (EVA) heat occur
Melt layer is peeled off.It the experiment proved that, pre-coating film made from the present embodiment does not occur the phenomenon of PUR stripping.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.
Claims (10)
- A kind of 1. bidirectional stretching polypropylene film base material, it is characterised in that：Passed through by top layer resin, sandwich layer resin and functional layer resin Coextrusion and biaxial tension are prepared；Described top layer resin, sandwich layer resin are polypropylene；Described functional layer resin is second Alkene-hexene copolymer or ethylene-octene copolymer.
- 2. bidirectional stretching polypropylene film base material according to claim 1, it is characterised in that：Described polyethylene-hexene is total to In polymers, the content of hexene is 5~15wt%；In described ethylene-octene copolymer, the content of octene is 5~15wt%.
- 3. bidirectional stretching polypropylene film base material according to claim 2, it is characterised in that：Described polyethylene-hexene is total to Polymers, ethylene-octene copolymer, its melt index are 5~15g/10min.
- 4. bidirectional stretching polypropylene film base material according to claim 2, it is characterised in that：Described polyethylene-hexene is total to Polymers, ethylene-octene copolymer, its dart impact breakage quality are 70~90 grams.
- 5. the bidirectional stretching polypropylene film base material according to one of Claims 1-4, it is characterised in that：It is described Functional layer resin thickness be 0.5~2.0 μm.
- 6. bidirectional stretching polypropylene film base material according to claim 1, it is characterised in that：Described sandwich layer resin contains 0.5~2.0wt% ethylene-hexene co-polymers or ethylene-octene copolymer.
- 7. the bidirectional stretching polypropylene film base material according to claim 1 or 6, it is characterised in that：Described sandwich layer resin Antistatic additive containing 0.1~0.3wt%.
- 8. the preparation method of the bidirectional stretching polypropylene film base material described in one of claim 1 to 7, including following step Suddenly：Top layer resin, sandwich layer resin and functional layer resin are coextruded via extruder, through flow passage distributor after in three layers of die head Converge, then thin-film sheet is formed after sharp cooling roll cools down；After thin-film sheet is heated, longitudinal stretching and cross directional stretch are carried out, is obtained To described bidirectional stretching polypropylene film base material.
- 9. preparation method according to claim 8, it is characterised in that：The top layer resin, the extrusion temperature of sandwich layer resin Control is at 230~260 DEG C, and the extrusion temperature of the functional layer resin is controlled at 210~260 DEG C, and the temperature control of sharp cooling roll exists 20~40 DEG C；In longitudinal stretching process, the draft temperature control of the top layer resin, sandwich layer resin is at 110~140 DEG C, work( At 90~120 DEG C, draw ratio is 4.5~5 for the draft temperature control of ergosphere resin；During cross directional stretch, draft temperature control System is at 150~170 DEG C, and at 160~170 DEG C, draw ratio is 7~10 for setting temperature control.
- A kind of 10. biaxial tension polypropylene precoating film, it is characterised in that：It is thin in the Biaxially oriented polypropylene described in claim 1 The function layer surface of film base material, coating ethylene-vinylacetate PUR are prepared.
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| CN110001136A (en) * | 2019-04-24 | 2019-07-12 | 山东绿恒无纺布制品有限公司 | A kind of non-woven fabrics documents pouch production technology |
| CN116656266A (en) * | 2023-05-16 | 2023-08-29 | 广东德冠薄膜新材料股份有限公司 | Biaxially oriented precoating film, and preparation method and application thereof |
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Application publication date: 20171222 |