CN202242207U - Biaxially oriented polypropylene film and composite material thereof - Google Patents
Biaxially oriented polypropylene film and composite material thereof Download PDFInfo
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- CN202242207U CN202242207U CN2011202012096U CN201120201209U CN202242207U CN 202242207 U CN202242207 U CN 202242207U CN 2011202012096 U CN2011202012096 U CN 2011202012096U CN 201120201209 U CN201120201209 U CN 201120201209U CN 202242207 U CN202242207 U CN 202242207U
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Abstract
The utility model provides a biaxially oriented polypropylene film, which can be subjected to hot fitting and compounding as well as multi-layer coextrusion with base materials, such as paper and the like and composite material containing the film. The film disclosed by the utility model comprises a base layer and a functional layer which directly contacts with the base materials, such as the paper and the like. The utility model also provides the composite material, which comprises the biaxially oriented polypropylene film disclosed by the utility model, and paper in sequence, wherein the functional layer of the film and the paper are in hot fitting and compounding.
Description
Technical field
The utility model relate to a kind of can with the compound multi-layer co-extruded polypropylene bidirection drawing films (BOPP) of base material heat posted such as paper.The utility model also relates to the composite of a kind of film and base material, particularly paper.
Background technology
Polypropylene bidirection drawing film (BOPP) is the staple product of packaging field, have light weight, transparent, nontoxic, moistureproof, gas permeability is low, the mechanical strength advantages of higher, the packing and the lamination that are widely used in products such as food, medicine, daily light industry, cigarette are compound.Wherein a kind of purposes of BOPP film is to fit in paper surface, and like books, packing carton etc. play a part moistureproof and the increase surface gloss.
The production technology of polypropylene bidirection drawing film (BOPP) mainly is made up of following operation: the batching batch mixing--extruder is extruded--extrude sheet through the T die--sheet chilling--to sheet through warm-up mill preheating-sheet longitudinal stretching-thermal finalization-preheating-cross directional stretch-thermal finalization-cooling-corona treatment-rolling again-cut-put in storage.
For the packing purposes, membrane structure must demonstrate good sealing characteristics.For the lamination combined use, this membrane structure must reach with it and combined by the firm lamination of compound substrate.Polypropylene bidirection drawing film (BOPP) has many perfect performance.Yet BOPP thermal viscosity and heat sealer are relatively poor, when fitting in the application of paper surface.
At present common paper and the complex method of BOPP are at BOPP surfaces coated one deck glue compound then (dry method is compound).The defective of this technology is to need to use environmentally harmful adhesive and solvent, and simultaneously, evaporating solvent also can cause bigger energy consumption in the glue dries process.
Disclosed among the Chinese patent CN2741769Y a kind of at BOPP film surface precoating layer ethylene-vinyl acetate copolymer (EVA) raw material, and then the technology compound with paper heating.Though this technology has avoided the use meeting to the adhesive that environment pollutes, and needs the extrusion coated equipment of additional investment, and needs use the EVA material of mass expensive.This technology has also increased once extrusion coated operation, has caused the increase of consumption of raw materials and energy consumption.
Therefore, industrial quarters need a kind ofly can not need just can directly heat the BOPP film of applying with paper at BOPP surface precoating glue or EVA.In reality processing, produce the maximum obstacle of this film at the BOPP production line and come from functional layer heat posted condensation material and the vertically adhesion of preheat roll and draw roll (MDO), can cause the film clarity variation after the adhesion, sheet generation broken hole and can't ordinary production.
Industrial quarters needs a kind of high transparent; High-stiffness, has the good hot composite performance with materials such as paper; Heat sealing fastness does not change with storage time of film and closes film in the BOPP heat posted of longitudinal stretching roller adhesion in process of production, and this film and the compound composite paper-plastic material of paper.
Summary of the invention
The utility model provides a kind of polypropylene bidirection drawing film (BOPP), and it comprises the basic unit and the heat posted functional layer of coextrusion.This polypropylene bidirection drawing film can be used for material heat posted such as paper compound.The ad hoc structure of the polypropylene bidirection drawing film of the utility model has overcome the technical problem that film heat posted in the prior art is closed the adhesion of functional layer material and longitudinal stretching roller (MDO); And have high transparent; High-stiffness; And with the good hot composite performance of material such as paper, and its heat posted is closed fastness and is relied on less to the thin film storage time.The utility model also provides and has had and above-mentioned polypropylene bidirection drawing film and composite other base material.The functional layer heat posted of base material and above-mentioned polypropylene bidirection drawing film is compound, forms composite.
The BOPP film of the utility model is mainly used in method of fractional steps biaxial tension BOPP film.The utility model also can be applicable to the film with footwork biaxial tension BOPP, also can be used for curtain coating, the film that blowing and double bubble process technology are made.
The utility model provides a kind of polypropylene bidirection drawing film; It comprises the basic unit and the functional layer of coextrusion, and polypropylene or polyethylene or its mixture are contained in basic unit, and said functional layer can be compound with the base material heat posted; Said base material is selected from paper, metal; Pottery, timber, glass or other plastic sheeting and metallized film.Aspect of the utility model, said film has inferior top layer between basic unit and functional layer.
The polypropylene bidirection drawing overall film thickness of the utility model is 10 microns-50 microns, and the thickness of said functional layer is 3 microns-10 microns.When having inferior skin, said functional layer is 3 microns-10 microns with time outer field gross thickness.
The basic unit of the utility model polyolefin biaxially oriented film can be one or more layers structure, for example two layers or three layers.When said basic unit was two layers or multilayer structure, the material of each layer was identical or different in this basic unit.
The functional layer of the utility model polyolefin biaxially oriented film can be one deck structure.The functional layer of the utility model polyolefin biaxially oriented film also can be sandwich construction, and for example two layers or three layers, each layer component is identical or different.
Aspect one of them of the utility model, said polyolefin biaxially oriented film is a three-decker, wherein contains two basic units and a functional layer; Or a basic unit, one top layer and a functional layer.
Aspect one of them of the utility model, said polyolefin biaxially oriented film is a five-layer structure.The polyolefin biaxially oriented film of this five-layer structure can contain one, two or three basic units and one or two functional layer, and contain or do not contain time top layer.Wherein a kind of situation is to contain three basic units, one top layer and a functional layer, or three basic units and two functional layers.
Aspect of the utility model, the functional layer of said polypropylene bidirection drawing film has minimum two fusing points, and first fusing point is between about 85 degree-105 degree; Second fusing point is between about 105 degree-130 degree.Test to the fusing point of film is the mature technology of chemical field, and method of testing comprises uses MELTING POINT and differential scanning calorimetry (DSC) etc.Wherein differential scanning calorimetry (DSC) is the method for more accurate and ripe test fusing point.
Aspect of the utility model, the functional layer of said polypropylene bidirection drawing film comprises component (A), or comprises the blend of component (A) and component (B):
Component (A) is selected from the copolymer of ethene and butylene, the copolymer of ethene and hexene, and the copolymer of ethene and octene, high density polyethylene (HDPE) (HDPE), or low density polyethylene (LDPE) (LDPE) are with above different poly any blends; Component (B) is for having the ethylene copolymer of polar group; It is selected from vinyl-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA); Ethylene-ethyl acrylate copolymer (EEA), ethylene ionomer type polar polymer and its blend.
Aspect of the utility model, said polar ethylene copolymer is characterised in that polar comonomers content in said polar ethylene copolymer is 4-25 weight %.
Aspect of the utility model, according to ASTMD-1238 (190 degree, 2.16 kilograms) test, the melt index (MI) that has the ethylene copolymer of polar group described in the component (B) is 0.5g-30g/10 minute.
Aspect of the utility model; The fusing point of the component (A) in the said polypropylene bidirection drawing film in the functional layer is measured with differential scanning calorimetry (DSC); Its DSC curve has two melting peaks at least, and the fusing point at first peak is about 75 degree-105 degree, is preferably about 85 degree-100 degree; The fusing point at second peak is about 105 degree-135 degree, is preferably about 115 degree-130 degree.Another aspect of the utility model, in the DSC curve of component (A), said first peak area accounts for the 20%-95% of whole functional layer melting peak area, is preferably 30%-85%, most preferably is 40%-70% in the said polypropylene bidirection drawing film; The area at said second peak accounts for the 5%-80% of whole functional layer melting peak area, is preferably 15%-70%, most preferably is 30%-60%.
The BOPP film of the utility model has one or more layers basic unit.The polymer substrate of any film forming thermoplastic polymer can be contained in said basic unit.In general, said basic unit is made up of the material that with the polypropylene is the master.Can comprise Noblen as the polyolefin of the utility model basic unit film forming polymer; Typically be the isotaxy homopolymers, or for different isotactic polypropylenes, atactic polypropylene, syndiotactic polypropylene, the atactic polypropylene copolymer of small amount of ethylene or higher alpha-olefin and the polypropylene blend of ethylene copolymer-modified isotactic polypropylene are arranged.An example that for example has the suitable film forming polymer of the polymer substrate that is used to form this basic unit at least about 302 ° of F (150 ℃) and up to the polyolefin representative of the fusing point of about 332.6 ° of F (167 ℃).In basic unit, can add other component such as Petropols to change such as performances such as heat sealer, gas permeability and intensity.
Though be made up of HOPP (Ho-PP) under the most of situation of base material, base material also can be made up of the blend of binary or ternary polymerized polypropylene (Co-PP) or itself and HOPP.
The base material material also can be sneaked into part high density polyethylene (HDPE) (HDPE), low density polyethylene (LDPE) (LDPE) or linear low density polyethylene (LLDPE) (LLDPE).
HDPE does not perhaps have minor amounts of comonomers, and has about 0.941g/cm
3Perhaps higher (for example about 0.952g/cm
3To about 0.968g/cm
3) density, for example about 266 ° of F are to the fusing point of about 299 ° of F (about 130 ℃ to about 148 ℃) and less than the melt index (according to ASTM D1238 measurement) of 1 to 50 gram/10 minutes (for example 1 to 50 gram is/10 minutes).
LDPE is a homopolymer polymer, and has at 0.912g/cm
3To 0.94g/cm
3(0.915g/cm for example
3To 0.928g/cm
3) density and the melt index (measuring) of 0.2 to 50 gram/10 minutes (for example 1 to 10 gram/10 minutes) of scope according to ASTM D1238.LDPE can use radical initiator production in high-pressure process.The LDPE of polymerization under high pressure is called as polyethylene from high pressure process sometimes.
LLDPE is divided into ethene, butylene copolymer, and ethene, hexene copolymer and ethene, octene copolymer also has less than the melt index (measuring according to ASTM D1238) of 1 to 50 gram/10 minutes (for example 1 to 10 gram is/10 minutes) and 0.910 to 0.940g/cm
3, preferred 0.915 to 0.928g/cm
3The density of scope.
Being used for biaxial tension BOPP film HOPP (Ho-PP) commonly used in the industry has: the T38F of Lanzhou petrochemical industry and Daqing petrochemical; The T36F of Dalian petrochemical industry.This type HOPP can be about 0.5-15 gram/10 minutes according to ASTMD-1238 (230 degree, 2.16 kilograms) test melt index (MI), fusing point can be between about 155 degree-165 spend.
The additive that can add about 0.01%-5% in the base material with master batch form.Some typical additives have, antiblocking agent, slipping agent, antistatic additive, nucleator etc.Base material also can comprise on a small quantity, the Petropols of 1%-15% for example, Petropols can be low-molecular-weight, with the deflection that improves film with lower draft temperature.Petropols can be through hydrotreated.Also can add the delustring masterbatch in the base material and come production delustring BOPP film.Also can add the pearly-lustre masterbatch in the base material and produce pearly-lustre BOPP film.The base material HOPP (Ho-PP) mainly provide deflection, water vapor rejection, transparency and processability.The thickness that base material HOPP (Ho-PP) can account for whole film is about 50%-95%.
The BOPP film of the utility model contains the heat posted functional layer, and said functional layer comprises component (A), or the blend of component (A) and component (B).
Aspect of the utility model, component (A) is selected from the copolymer of ethene and butylene, the copolymer of ethene and hexene, and the copolymer of ethene and octene, high density polyethylene (HDPE) (HDPE), low density polyethylene (LDPE) (LDPE) and above-mentioned different poly any blends,
Component (B) is for containing the ethylene copolymer of polar monomer, and it is selected from vinyl-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA) and its blend.In the utility model, the said characteristic that contains the ethylene copolymer of polar monomer is that generally polar comonomers content in said ethylene copolymer is 4-25 weight %.Aspect of the utility model, the polar comonomers in the component (B) accounts for functional layer greater than 0, is preferably greater than 0.1 weight %.Aspect of the utility model, according to ASTMD-1238 (190 degree, 2.16 kilograms) test, the said melt index (MI) that contains the ethylene copolymer of polar monomer restrains/10 minutes for 0.5-30.
Aspect this one, the component in the functional layer (A) is characterised in that: its fusing point is measured with differential scanning calorimetry (DSC), and its DSC curve has two melting peaks at least, and the fusing point at first peak is about 75 degree-105 degree, is preferably about 85 degree--100 degree; The fusing point at second peak is about 105 degree-135 degree, is preferably about 115 degree-130 degree.
Aspect another of the utility model, in the DSC curve of functional layer component (A), it is about 20%--95% that 75 degree--watery fusion peak area between 105 degree accounts for whole functional layer melting peak area, is preferably about 30%--85%, most preferably is about 40%--70%; It is about 5%--80% that melting peak area between 105 degree-135 degree accounts for whole functional layer melting peak area, is preferably about 15%--70%, most preferably is about 30%--60%.
Aspect of the utility model; The component (A) that satisfies in the functional layer of above condition can be made up of minimum two key component polyblends; Wherein first component polymer is the polyolefin of fusing point between about 75 degree-105 degree, and second component polymer is the polyolefin of fusing point between about 105 degree-135 degree.The fusing point of preferred first component polymer is about 85 degree--100 degree, the fusing point of second component polymer are about 115 degree--, and 130 spend.
In the utility model, said first component polymer is a copolymer, and it is selected from the copolymer of ethene and butylene, hexene and/or octene, or is its any blend.The copolymer of said ethene and butylene, hexene or octene can be a binary polymer, and like ethylene-butene copolymer, ethene-hexene copolymer and ethylene-octene copolymer, or ter-polymers are like ethene-hexene-octene copolymer.Preferably; The butylene weight content is between 15%-30% in the ethylene-butene copolymer of the utility model; The hexene weight content is between 12%-25% in ethene-hexene copolymer; The octene weight content is between 10%-22% in the ethylene-octene copolymer, and in ethene-hexene-octene copolymer hexene and octene weight content between 12%-25%.Said copolymer fusing point is preferably about 85 degree--100 degree at about 75 degree-105 degree.
Aspect of the utility model, said first component polymer is the metallocene quasi-polyethylene.Said metallocene quasi-polyethylene is characterised in that its comonomer distribution is even, comonomer distribution index CDBI＞55%, and preferred CDBI＞65%, molecular weight distribution (Mw/Mn) has only a tangible melting peak during DSC test between 2-3.Mw/Mn can pass through GPC gel permeation chromatography technical measurement.CDBI is the index of the comonomer distribution uniformity, and CDBI is big more, and comonomer distributes even more on main chain.The intensification fractionation extracting (TREF) of passing through of CDBI is measured, and its definition and method of testing Wild wait the people in Journal of Polymer Science, Poly.Phys.Ed., Vol.20,441 (1982); U.S. Pat 4,798,081, US5 has description in 008,204.Aspect another of the utility model, said first component polymer can be 0.5-30 gram/10 minutes according to ASTMD-1238 (190 degree, 2.16 grams) test melt index (MI), and fusing point is about 75 degree-110 degree.
First common on the market component material has: the AFFINITY of Dow Chemical (registration mark) LLDPE, and as 1881,1450G; The EXACT of Exxon Mobil Corporation (registration mark) LLDPE is as 0201,0203 etc.
In the utility model, said second component polymer can be a copolymer, and it is selected from the copolymer of ethene and butylene, hexene or octene, or any blend of said copolymer.The copolymer of said ethene and butylene, hexene or octene is a binary polymer, and like ethylene-butene copolymer, ethene-hexene copolymer and ethylene-octene copolymer, or ter-polymers are like ethene-hexene-octene copolymer.Said copolymer fusing point is preferably about 115 degree--130 degree between about 105 degree-135 degree.
Aspect another of the utility model, said second component polymer can be a homopolymers, like LDPE or HDPE.Aspect of the utility model, said second component polymer restrains/10 minutes according to ASTMD-1238 (190 degree, 2.16 kilograms) test melt index (MI) for 0.5-30, and fusing point is about 105 degree-135 degree.Second common on the market component material comprises: Yanshan Petrochemical LDPE IF7B, the HDPE HTA 108 of EXXON company, the LDPE 640I. of DOW Chemical
Aspect another of the utility model, the component (A) in the heat-sealing functional layer is a bimodal polyethylene.Said bimodal polyethylene is selected from ethylene-butene copolymer, ethene-hexene copolymer, ethylene-octene copolymer, ethene-hexene-octene copolymer and its blend.The bimodal polymers that is used for the utility model has typical bimodal pattern fusing point characteristic.Aspect of the utility model, the rarest two tangible melting peaks on the DSC curve, the fusing point at first peak are between about 75 degree-105 degree, preferably between about 85 degree-100 degree; The fusing point at second peak is between about 105 degree-135 degree, preferably between about 115 degree-130 degree.Aspect of the utility model; In the melting peak that above DSC tests out, first peak, it is about 20%--95% that the watery fusion peak area between promptly 75 degree-105 are spent accounts for whole functional layer melting peak area; Be preferably about 30%--85%, most preferably be about 40%--70%; Second peak, it is about 5%--80% that the high-temperature fusion peak area between promptly 105 degree-135 are spent accounts for whole functional layer melting peak area, is preferably about 15%--70%, most preferably is about 30%--60%.
Aspect of the utility model, the bimodal polyethylene of the utility model can have bimodal molecular weight distribution, promptly on gel permeation chromatography (GPC) curve, shows at least two kinds of components that contain different molecular weight, and is for example defined among the CN1543483A.The bimodal polyethylene of the utility model can not embody the component that obvious different molecular weight is arranged at the GPC curve yet.
The ethylene copolymer of some two melting peak of existence that are polymerized by traditional Ziegler-Natta catalyst of this area.This quasi-polyethylene is to be polymerized at a reactor.Molecular weight distribution broad (Mw/Mn＞3), comonomer distribution is inhomogeneous, and its comonomer distribution index CDBI is generally less than 55%, and comonomer distribution is inhomogeneous, and therefore a lot of low-molecular-weight noncrystalline molecules are arranged, and these low molecular material fusing points are low.This common quasi-polyethylene is that ATTANE (registration mark) LLDPE of Dow Chemical is as 4404,4203 on the market.
The preferred bimodal polyethylene of the utility model is to carry out in the system that is formed by two reactor serial or parallel connections, and one of them reactor is produced low-melting component, and another reactor is produced high melting point component.Preferred, the utility model bimodal polyethylene is to carry out in the system that is formed by two reactor serial or parallel connections, one of them reactor production low melting point high molecular weight component, and another reactor is produced the high-melting-point lower-molecular-weight component.The definition and the preparation method of this bimodal polyethylene have detailed description in patent CN1090856 and US6111023.Aspect of the utility model; The watery fusion peak component of bimodal polyethylene is formed by metallocene class polymerization catalyst; Be characterized as first melting peak (low temperature peak) corresponding polymers compositions comonomer distribution index (CDBI) greater than 55%, preferred CDBI＞65%.Aspect another of the utility model, these polymer can be 0.5-30 gram/10 minutes according to ASTMD-1238 (190 degree, 2.16 kilograms) test melt index (MI).The bimodal polyethylene that can be used for the utility model on the market has ELITE (registration mark) the LLDPE 5500G of DOW Chemical, 5220G, 5815G; Mitsui company EVOLUE (registration mark) LLDPE as 2020,1520.
Aspect of the utility model, functional layer component (A) is about 75 degree-105 degree by bimodal polyethylene and fusing point, and the metallocene PE blend of preferred 80 degree-100 degree forms.The definition of said bimodal polyethylene and characteristic are as previously mentioned.Said metallocene PE is selected from ethylene-butene copolymer; Ethene-hexene copolymer, ethylene-octene copolymer, ethene-hexene-octene copolymer and its blend; Its comonomer distribution index CDBI＞55%; Preferred CDBI＞65%, molecular weight distribution (Mw/Mn) have only a tangible melting peak during DSC test between 2-3.
In the utility model; Component (B) is for containing the ethylene copolymer of polar monomer; It is selected from vinyl-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA); Ethylene-ethyl acrylate copolymer (EEA) and ethylene ionomer type polymer, or its blend.
Compare with polyethylene, vinyl-vinyl acetate copolymer (EVA) has been owing to introduced VAM in strand, thereby reduced high-crystallinity.Vinyl acetate among the EVA (VA) content is at about 5～40 weight %.Common EVA has Tai Wantai to mould
7350F on the market; 7130F; 7140F etc.; 8450 etc. of Japan NUC company; And
3130,3190 of Dupont etc.
Ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), the performance and the EVA of ethylene-ethyl acrylate copolymer (EEA) isopolarity ethylene copolymer have a lot of similarities.Common EAA has the Primacore (registration mark) of Dow Chemical, as: 1410,3003,3002 etc.Common EMAA has the NUCREL (registration mark) of du pont company, as 3990,0910 etc.Common EEA has the Amplify (registration mark) 101,103 of Dow Chemical etc.
Ion-type polar ethylene polymer is to use zinc to the hydrogen ion on the sour key in the resins such as EAA, and sodium ion replaces one type of ethene polymers that the back forms.Zinc, sodium ion can form intermolecular crosslinked at normal temperatures, therefore, have improved the physical property of polymer greatly.Common Ionomer has the Surlyn (registration mark) of Du Pont on the market, as 1650,1610 etc.
As not having a special expression, the unit of the temperature that occurs among this paper " degree " is meant degree centigrade, promptly ℃.
The utility model BOPP membrane structure comprises one or more (for example two or three) basic unit and functional layer.The material of each basic unit can be identical or different.
The basic unit of the utility model BOPP film can be one or more layers structure, for example two layers or three layers.When said basic unit was two layers or multilayer structure, the material of each basic unit was identical or different.
The functional layer of the utility model BOPP film can be one deck structure.
The functional layer of the utility model BOPP film also can be sandwich construction, and for example two layers or three layers, each layer component is identical or different.Wherein be called outer functional layer with outermost one deck that the material of its applying (for example paper etc.) directly contacts, said outer functional layer contains the component (A) like the front definition, or the blend of component (A) and component (B), and it has at least two fusing points.
The basic unit of the utility model BOPP film can directly contact with functional layer, perhaps between basic unit and functional layer, can have inferior top layer.The polymer on said top layer can be identical or different with functional layer.
Aspect of the utility model, a kind of polypropylene bidirection drawing film is provided, it contains one, two or three basic units, a functional layer, and one top layer between basic unit and the functional layer, and wherein each basic unit's component is identical or different.
Aspect of the utility model, said time the top layer contains the component (A) just like the front definition, or the blend of component (A) and component (B).Aspect another of the utility model, said time the ethene polymers that fusing point is the single fusing point of about 85 degree-105 degree is contained on the top layer.Aspect another of the utility model, the film forming polymer on said top layer contains ethene polymers and as the blend of the component (B) that defines of front that fusing point is the single fusing point of about 85 degree-105 degree.
After the biaxial tension of the utility model polypropylene bidirection drawing film; Can be on the surface of film, promptly substrate surface (being a non-side surface that contacts with functional layer), functional layer surface (being a non-side surface that contacts with basic unit) are handled respectively or simultaneously and are improved its surface tension.Common processing has corona treatment, flame treatment or plasma treatment.Aspect of the utility model, carry out corona treatment to the thin film based laminar surface or to the functional layer surface, or simultaneously thin film based laminar surface and functional layer surface are carried out corona treatment.
The thickness of the utility model polypropylene bidirection drawing film is about 10 microns-50 microns, and functional layer thickness is 3 microns-10 microns.Aspect of the utility model, when having time top layer, functional layer is 3 microns-10 microns with the gross thickness on time top layer
The utility model polypropylene bidirection drawing film take-up and cut into certain width after can be used for the heating of various paper compound.The paper that paper can be paper blank or printed.This film also can be used for other plastic sheeting and metallized film heat posted compound.This film also can be used for metal, pottery, and timber, the heat posted of material surfaces such as glass is compound.This film also can be used for the BOPP basement membrane of aluminizing, and aluminium lamination can be through the vacuum aluminum-coated functional plane that is applied to.The thickness of aluminizing is 10nm-100nm.
The composite that the utility model also provides above-mentioned polypropylene bidirection drawing film and base material to be compounded to form.The composite of the utility model contains the polypropylene bidirection drawing film and the base material of the utility model in order, and wherein said polypropylene bidirection drawing film comprises the basic unit and the functional layer of coextru-lamination, and said functional layer and base material are compound.Said base material can be paper, metal, pottery, timber, glass or other plastic sheeting and metallized film etc.Paper comprises various art papers, offset paper label paper, brown paper, corrugated paper, sack kraft paper, glassine paper, art post paperboard and speciality paper etc.The composite surface of paper can print or non-printing.Aspect of the utility model, the polypropylene bidirection drawing film of the utility model and the composite of paper are provided.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the utility model film.
Accompanying drawing 2 is the another kind of structural representation of the utility model film.
Accompanying drawing 3 is the structural representation of the utility model composite.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done specific descriptions.
The utility model specific embodiment preferred with it combines when setting forth, and above description and the following example are the scopes that is used for illustrating rather than limiting the utility model.
According to shown in Figure 1, the polypropylene bidirection drawing film 4 of the utility model comprises the basic unit 1 and functional layer 2 of coextrusion, and polypropylene or polyethylene or its mixture are contained in basic unit 1, and said functional layer 2 can be compound with the base material heat posted.Said base material can be paper, metal, pottery, timber, glass or other plastic sheeting and metallized film etc.The polypropylene bidirection drawing film 4 of the utility model is to stretch through co-extrusion get, and basic unit 1 and functional layer 2 combine through coextrusion.
In an embodiment of the utility model, said film has inferior top layer between basic unit 1 and functional layer 2.
The basic unit 1 of the polyolefin biaxially oriented film 4 of the utility model can be one or more layers structure, for example two layers or three layers.The functional layer 2 of the utility model polyolefin biaxially oriented film can be one or more layers structure, for example two layers.
Aspect one of them of the utility model, said polyolefin biaxially oriented film is a five-layer structure.The polyolefin biaxially oriented film of this five-layer structure can contain one, two or three basic units and one or two functional layer, and contain or do not contain time top layer.Wherein a kind of situation is embodiment as shown in Figure 2, and it contains three basic units (being respectively 11, the second basic units 12 of first basic unit and the 3rd basic unit 13), one top layer 3 and a functional layer 2.
The condition of production of the film of the embodiment shown in Fig. 2 is following:
On BRUECKNER method of fractional steps biaxial tension equipment, producing above-mentioned five-layer co-squeezing BOPP does not have glue heat posted diaphragm (being the polyolefin biaxially oriented film of said five-layer structure), and its structural representation is seen Fig. 2.Its structure sees the following form one.As a comparison, functional layer BOPP film (film-12) of only containing single melting peak polymer has also provided concrete structure.
Film (total thickness: 18 μ) structure such as table one:
Table one: membrane structure
*: film 3 does not have inferior top layer, and its functional layer thickness is 5.5 μ.
Material therefor details such as table two:
Table two: use raw material
The structure of 12 kinds of films has been shown in the table one, respectively the functional layer of above-mentioned various films has been done DSC (differential scanning calorimetry) test analysis, dsc measurement carries out on Perkin Elmer System 7Thermal Analysis System.Method of testing is: 1) be heated to 180 degree to institute's specimen, constant temperature is 5 minutes then; 2) sample with 10 the degree/minute speed be cooled to 20 the degree; 3) with 10 the degree/minute speed sample be heated to 180 the degree.The endothermic curve in the 3rd step is the melt temperature curve.
Test result finds that film-1 functional layer material shows the melting peak of 97 degree and 123 degree, and two peak area ratios are about 7/3.
The functional layer of film-2 also has two melting peaks, and the fusing point at first peak is 98.5 degree, and the fusing point at second peak is 132 degree, and two peak area ratios are about 8/2.
It is 96.5 degree that the functional layer of film-3 (being ELITE 5815) also has two melting peaks, the fusing point at first peak, and the fusing point at second peak is 120 degree, and two peak area ratios are about 1/1.
Film-4 functional layer has 3 melting peaks, first melting peak 89 the degree, second 97 the degree, the 3rd 121 the degree.3 peak area ratios are about: 1/4/5.Because fusing point is 88 degree during component (B) EVA7412F independent measurement, so 97 degree and 121 degree are the melting peak of component (A) bimodal polyethylene 5815.
Film-5 functional layer has 3 melting peaks, first melting peak 89 the degree, second 96 the degree, the 3rd 121 the degree.3 peak area ratios are about: 0.5/4.5/5.As stated, the melting peak of 89 degree is the melting peak of EVA7412F, and other two peaks then are the sign peak of component (A).
The functional layer melting peak same film-5 of film-6 is identical.
Film-7 functional layer has two melting peaks, is respectively 97 degree and 118 degree, and ratio is 6/4, and the first component fusing point overlaps 97 degree in fusing point of its component (B) (Primacore 3002) and the component (A).
Film-8 functional layer has two melting peaks, is respectively 98 degree and 121 degree, and ratio is 7/3, and the first component fusing point overlaps 98 degree in the fusing point of its component (B) Primacore 3002 and the component (A).
Film-9 functional layer has 3 melting peaks, is respectively 88,97 degree and 121 degree, and ratio is about 0.5/3/6.5, and as previously mentioned, 88 melting peaks of spending are represented component (B), i.e. EVA7412F, and other two peaks then are the sign peak of component (A).
Film-10 functional layer has two melting peaks, is respectively 95 degree and 123 degree, and ratio is 4/6.
Film-11 functional layer has 3 melting peaks, is respectively 88,97 degree and 119 degree, and ratio is that 4/3/3,88 melting peak of spending is represented component (B), i.e. EVA7412F, and other two peaks then are the sign peak of component (A).
The functional layer of film-12 has only a melting peak of 99 degree.
The production technology of all kinds of films shown in the above-mentioned table one is:
Each raw material that table two is listed mix respectively according to the structure of all kinds of films shown in the table one or separately send into BOPP extruder processing plasticizing, produce sheet through the T die then.Sheet passes through after the preheating earlier vertically cross directional stretch more then.Film after the stretching cools off through heat-setting section then, and corona treatment is wound into the female film of big volume at last.The female film of big volume cuts into the finished film of required width after slaking in 48 hours.
Production technology and parameter are seen table three in detail:
Table three: processing technology and parameter
Serious MDO adhesion has taken place in film-12, and production can't surpass 30 minutes continuously, can not carry out ordinary production.In addition, in process, observing film-10 and film-11 has adhesion phenomenon with longitudinal stretching roller (MDO).
All can produce continuously more than 10 hours for arbitrary type in film-1 to the film-9, satisfy the ordinary production requirement fully.
According to shown in Figure 3; The composite of the utility model contains the polypropylene bidirection drawing film 4 and base material 5 of the utility model in order, and wherein said polypropylene bidirection drawing film 4 comprises the basic unit 1 and functional layer 2 of coextrusion, and said functional layer 2 is compound with base material 5; Base material 5 can be paper, metal; Pottery, timber, glass or other plastic sheeting and metallized film.In one embodiment, said film has inferior top layer between basic unit 1 and functional layer 2.
The condition of production of the composite of the utility model is following:
The film and the A4 printing paper of aforementioned preparation is compound.The heat posted resultant pressure is: 0.15N/mm; Fashionable of heat posted is 1 second.
The BOPP film of the utility model is seen table four with combined strength bination and other The performance test results of contrast film and paper heat posted:
Table four: film performance
Annotate: all films have all been made corona treatment to functional layer, handle fastness: 40 dyne.
The film of the utility model-1, mass ratio contrast film-12 excellence of film-2 and film-3.The film deflection that the secant modulus of the utility model film characterizes is higher than the contrast film.Film glossiness of the present invention is higher than the contrast film, and mist degree is lower than the contrast film.High gloss, low haze have reflected that film appearance of the present invention is superior to contrasting film.High-stiffness is extremely important to outward appearance and the machine of the walking performance on packing machine.Comparatively speaking, the glossiness of film-1 and film-3 and mist degree are excellent than film-2.The glossiness of film-3 and mist degree are especially obviously better.
Table five: heat posted is closed fastness
Unexpected, the glossiness of film-4 to film-9 and deflection and comparative film are suitable.Wherein, film-4 has still showed superior glossiness and low mist degree.
Shown in table five, the applying fastness of said film-4 to film 9 and paper changes very little with the thin film storage time lengthening, descended 15% and contrast used film-12 applying fastness after storing a week.
In sum; Compare with prior art; The polyolefin biaxially oriented film of the utility model has the high grade of transparency and high-stiffness unexpectedly; And with the good hot composite performance of material such as paper, its heat posted is closed fastness and the thin film storage time is relied on less, and has solved the technical problem of the adhesion of thin-film material and longitudinal stretching roller (MDO).
Only if point out in addition, the practice of the utility model will be used the routine techniques of organic chemistry, polymer chemistry etc., obviously except that the special description of institute in above-mentioned explanation and embodiment, can also other mode realize the present invention.Other in the utility model scope aspect with improve will be obvious to those skilled in the art in the invention.According to the instruction of the utility model, many changes and variation are feasible, so it is within the scope of the utility model.
All patents, patent application and the technical paper that this paper mentioned all is attached to this paper in view of the above by reference.
Claims (9)
1. a polypropylene bidirection drawing film is characterized in that, said polypropylene bidirection drawing film (4) comprises coextrusion basic unit (1) and functional layer (2); Said functional layer (2) can be compound through heating with base material; Said base material is selected from paper, metal, pottery, timber; Glass or other plastic sheeting and metallized film
Wherein, said polypropylene bidirection drawing film (4) gross thickness is 10 microns-50 microns, and the thickness of said functional layer (2) is 3 microns-10 microns.
2. according to the polypropylene bidirection drawing film of claim 1, it is characterized in that wherein between basic unit (1) and functional layer (2), having inferior top layer (3), the gross thickness on functional layer (2) and time top layer (3) is 3 microns-10 microns.
3. according to the polypropylene bidirection drawing film of claim 1 or 2, it is characterized in that it is three layers or five-layer structure, wherein basic unit (1) is one, two or three-decker, and said functional layer (2) is one or two-layer structure.
4. according to the polypropylene bidirection drawing film of claim 1 or 2, it is characterized in that its functional layer (2) has minimum two fusing points, first fusing point is between about 85 degree-105 degree; Second fusing point is between about 105 degree-130 degree.
5. according to the polypropylene bidirection drawing film of claim 4, it is characterized in that wherein component (A) is a bimodal polyethylene, the rarest two tangible melting peaks on the DSC curve of said bimodal polyethylene, the fusing point at first peak is between about 85 degree-105 degree; The fusing point at second peak is between about 105 degree-130 degree.
6. according to the polypropylene bidirection drawing film of claim 5, it is characterized in that in the DSC curve of wherein said bimodal polyethylene, it is about 40%-70% that said first peak area accounts for whole functional layer (2) melting peak area; It is about 30%-60% that said second peak area accounts for whole functional layer (2) melting peak area.
7. composite, polypropylene bidirection drawing film (4) and base material (5) that it contains among the claim 1-6 each in order is characterized in that; Wherein said polypropylene bidirection drawing film (4) comprises the basic unit (1) and the functional layer (2) of coextru-lamination; Said functional layer (2) is compound with base material (5), and said base material is selected from paper, metal, pottery; Timber, glass or other plastic sheeting and metallized film.
8. according to the composite of claim 7, it is characterized in that wherein said base material is a paper.
9. according to Claim 8 composite is characterized in that wherein said base material is an art paper, offset paper, label paper, brown paper, corrugated paper, sack kraft paper, glassine paper, art post paperboard or speciality paper.
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| CN2011202012096U CN202242207U (en) | 2011-06-15 | 2011-06-15 | Biaxially oriented polypropylene film and composite material thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202012096U CN202242207U (en) | 2011-06-15 | 2011-06-15 | Biaxially oriented polypropylene film and composite material thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103059763A (en) * | 2012-04-27 | 2013-04-24 | 李波 | Bidirectional stretching polypropylene film for hot binding compounding, and its preparation method |
| CN105729958A (en) * | 2016-03-11 | 2016-07-06 | 海宁长林包装材料有限公司 | High-temperature-resistant and high-barrier multilayer compound film for packaging bags |
| CN107877945A (en) * | 2017-10-27 | 2018-04-06 | 平湖市燎原印刷厂 | A kind of textbook bag book film |
| CN112123902A (en) * | 2020-09-02 | 2020-12-25 | 安徽国风塑业股份有限公司 | BOPP film capable of being directly compounded with paper and plastic and preparation method thereof |
-
2011
- 2011-06-15 CN CN2011202012096U patent/CN202242207U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103059763A (en) * | 2012-04-27 | 2013-04-24 | 李波 | Bidirectional stretching polypropylene film for hot binding compounding, and its preparation method |
| CN103059763B (en) * | 2012-04-27 | 2015-03-25 | 李波 | Bidirectional stretching polypropylene film for hot binding compounding, and its preparation method |
| CN105729958A (en) * | 2016-03-11 | 2016-07-06 | 海宁长林包装材料有限公司 | High-temperature-resistant and high-barrier multilayer compound film for packaging bags |
| CN107877945A (en) * | 2017-10-27 | 2018-04-06 | 平湖市燎原印刷厂 | A kind of textbook bag book film |
| CN112123902A (en) * | 2020-09-02 | 2020-12-25 | 安徽国风塑业股份有限公司 | BOPP film capable of being directly compounded with paper and plastic and preparation method thereof |
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