CN104608446A - White reflective polyester film and preparation method thereof - Google Patents
White reflective polyester film and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a white reflective film, and provides a white reflective polyester film and a preparation method thereof in order to improve the reflectivity and stiffness of the conventional white reflective film. The film adopts an A-B-A three-layer structure, wherein the A-layer structure accounts for 4%-15% of the total thickness, and the B layer accounts for 70%-92% of the total thickness; the A layer comprises 50%-99.9% of polyester resin and 0.1%-50% of inorganic particles; the B layer comprises the polyester resin, the inorganic particles, incompatible resin, toughened resin, a chain extender, a nucleating agent and a dispersing agent; oval cell structures are arranged in the B layer, round resin particles are arranged in cells and adopt core-shell structures, the diameter of each core is 0.01-1 mu m, and the thickness of each shell is 0.01-0.1 mu m; and the thickness of the film is 50-350 mu m. The film has excellent reflectivity and stiffness.
Description
Technical field
The present invention relates to a kind of white films, in more detail, relate to the white reflective film being suitable as area source reflection part.
Background technology
In recent years, as the display unit of PC, TV, mobile phone etc., the display screen of liquid crystal is employed in a large number.These LCDs (LCD) provide irradiation light by arranging the area source being called as backlight in inner side, thus show.Backlight irradiates to reach the requirement that light must irradiate whole screen equably, takes the area source structure being called as side light type or full run-down type.Wherein, wishing slimming, in slim LCDs that miniaturized notebook computer etc. uses, the type of backlight using side light type, namely side light type arranges light source in side relative to screen is applicable to.
In this side light type backlight source, using cold-cathode tube or LED as light source, light is evenly propagated from the edge of light guide plate, spreads, irradiate whole LCDs equably.And, in order to more effectively utilize light, reflecting plate being set around light source, in addition, in order to make effectively to be irradiated to LCD screen side from the light of light guide plate diffusion, being provided with reflecting plate at the back side of light guide plate.Reduce the loss of the light sent from light source thus, and make LCD screen brighter.
On the other hand, for the backlight of the giant-screen of LCD TV except sidelight mode, adopt full run-down type light mode.Which is set up in parallel cold-cathode tube by the back side at liquid crystal panel, and then arranges reflecting plate at the back side of its cold-cathode tube, makes the light from light source effectively be irradiated to LCD screen side.For the reflecting plate of this LCDs backlight, with the giant-screen of the slimming of mobile phone and notebook computer, miniaturization and TV, although require that reflecting plate has highly reflective for film and highly endures property.
At present for the backlight reflectance coating of the giant-screen of slimming mobile phone and notebook computer, TV, general use forms Porous white polyester film by bubble.But under the prerequisite requiring high reflectance, need the consumption of the inorganic particulate increased in polyester film, increase the consumption etc. with the inconsistent resin of polyester, increase the number of reflecting interface in polyester film, but due to the consumption of increase inorganic particulate, the consumption with the inconsistent resin of polyester, all can reduce the deflection of reflective Mylar, and raising reflectivity is also extremely limited.
Summary of the invention
In order to improve reflectivity and the deflection of existing white reflection film, the invention provides a kind of white reflective polyester film and preparation method thereof.Reflectance coating provided by the invention has high reflectivity and endures property.
In order to solve the problems of the technologies described above, the present invention adopts following technical proposals:
The invention provides a kind of white reflective polyester film, described white reflective polyester film is ABA three-decker, and white polyester film thickness is 50-350 μm; Wherein, A layer thickness accounts for gross thickness 4-15%, and B layer thickness accounts for gross thickness 70-92%; A layer in described white reflective polyester film is made up of mylar and inorganic particulate, and in A layer, the content of mylar is 50-99.9%, and the content of inorganic particulate is 0.1-50%; Described B layer is made up of mylar, inorganic particulate, incompatible resin, toughened resin, chain extender, nucleator and dispersant; In described B layer, the addition of described mylar is 40-90%, the addition of described inorganic particulate is 0.1-50%, the addition of described incompatible resin is 5-20%, the addition of described toughened resin is 0.5-5%, and the addition of described chain extender is 0.1-2%, and the addition of described nucleator is 0.1-2%, the addition of described dispersant is 0.1-2%, and described percentage is weight percentage.Above-mentioned white reflective polyester film is referred to as reflectance coating.
Further, described white reflective polyester film thickness is 188 μm.
Further, in described white reflective polyester film, A layer thickness accounts for gross thickness 5.5-7%, and B layer thickness accounts for gross thickness 86-89%.
Further, in described A layer, described mylar is PETG, and described inorganic particulate is silicon dioxide granule.
Further, in described A layer, described mylar is PETG, and addition is 98-99%; Described inorganic particulate is silicon dioxide granule, and addition is 1-2%.
Further, in described B layer, described mylar is selected from the one in PETG, polybutylene terephthalate (PBT), PEN, and addition is 56-67%.Further, described mylar is preferably PET.Mylar adopts film level polester cut sheet (abbreviation cut film).Further, the inherent viscosity 0.68-0.80dL/g of described mylar.
Further, in described B layer, described inorganic particulate be selected from calcium carbonate, zinc oxide, barium sulfate, rutile titanium dioxide, anatase thpe white powder, aluminium oxide, mica, kaolin one or both, the particle diameter of described inorganic particulate is 0.1-2.0 μm; The addition of described inorganic particulate is 10-25%.Further, described inorganic particulate is preferably barium sulfate, rutile titanium dioxide.Wherein, barium sulfate preferable particle size is 0.6-0.8 μm; Rutile type titanium white, particle diameter is 0.19-0.25 μm.
Described inorganic particulate is through surface treatment, and surface-treated object reduces photochemical activity and the dispersiveness of raising inorganic particulate in mylar of inorganic filler, and surface treatment is one or more layers SiO of Surface coating at inorganic particulate
2-Al
2o
3deng inorganic oxide or organic compound.
Further, in described B layer, described incompatible resin is selected from the one in polymethylpentene, polypropylene, polyethylene, polybutene, cyclic olefine copolymer, polystyrene, polymethylstyrene, and addition is 10-20%.Wherein, incompatible resin is preferably polyolefin.Further, incompatible resin is preferably the one in the little polypropylene of critical surface tension, polymethylpentene, cyclic olefine copolymer again in polyolefin.Wherein, preferred polyolefinic glass transition temperature is 80-180 DEG C (Tg, ISO11375-1 ,-2 ,-3).
Further, in described B layer, described toughened resin is selected from maleic anhydride (MAH) grafted high density polyethylene (HDPE) (percent grafting >=0.5%), MAH grafted linear low-density polyethylene (LDPE) (percent grafting >=0.5%), MAH grafted ethene octene copolymer (POE) (percent grafting >=0.5%), MAH graft phenylethene-ethylene-butylene, Styrene block copolymer (SEBS) (percent grafting >=0.5%), one in GMA (GMA) grafting POE (percent grafting >=0.5%), addition is 3-5%.Wherein, MAH Maleated SEBS (percent grafting >=0.5%) is preferably.
Further, in described B layer, described chain extender is selected from the one in the polymer chain extender of epoxies, the polymer chain extender of isocyanates or acylamide polymer chain extender, and addition is 1-2%.Wherein, chain extender is preferably polyamide polymers chain extender, as carbodiimides, polycarbodiimide.
Further, in described B layer, described nucleator is selected from the one in sorbose alcohols or organic phosphate, and addition is 1-1.5%.Further, described nucleator is selected from the Millad3988 (the polypropylene transparent nucleater Millad 3988 that Milliken Co. of the U.S. produces) that Milliken company of the U.S. produces, NU-100 (the beta crystal-type nucleater that the new Japanese Chemical Industry of Japan is produced, belong to aromatic amine compounds), or the NA-10 that Japanese rising sun electrification company produces.
Further, in described B layer, described dispersant is selected from the one in polyethylene glycol (PEG), polypropylene wax, and addition is 1-1.5%.Further, described dispersant is preferably PEG, and molecular weight is 5000-50000.
Further, there is in the B layer of described white reflective polyester film oval foam structure, the major diameter of oval shaped cells is 0.05-3 μm, the minor axis of oval shaped cells is 0.01-1 μm, there is in described abscess circular resin particle, described resin particle has nucleocapsid structure, and the diameter of core is 0.01-1 μm, and the thickness of shell is 0.01-0.1 μm.In high-temperature hot type-approval process, incompatible resin is softening is agglomerated into spheric granules, and toughened resin has higher softening point, wraps incompatible resin gradually, forms the resin particle with nucleocapsid structure, and the effect of resin particle ensures that abscess does not cave in.
Further, the density of described abscess is 1-100 ten thousand/cm
3.Further, the density of described abscess is 1-10 ten thousand/cm
3.
Further, reflectivity >=96% of described white reflective polyester film, deflection >=13.0cm.
Further, reflectivity >=97% of described white reflective polyester film, deflection >=13.0cm.
Further, in described white reflective polyester film, in described A layer, described mylar is PETG, and addition is 98-99%; Described inorganic particulate is silicon dioxide granule, and addition is 1-2%.In described B layer, described mylar is selected from the one in PETG (PET), polybutylene terephthalate (PBT) (PBT), PEN (PEN), and addition is 56-67%; The inherent viscosity of described mylar is 0.68-0.80dL/g.In described B layer, described inorganic particulate is selected from the one in calcium carbonate, zinc oxide, barium sulfate, rutile titanium dioxide, anatase thpe white powder, aluminium oxide, and the particle diameter of described inorganic particulate is 0.1-2.0 μm; The addition of described inorganic particulate is 10-25%.Further, described inorganic particulate is preferably barium sulfate or rutile titanium dioxide.In described B layer, described incompatible resin is selected from the one in polymethylpentene, polypropylene, polyethylene, cyclic olefine copolymer, and addition is 10-20%.In described B layer, described toughened resin is selected from the one in MAH grafted linear low-density polyethylene (LDPE) (percent grafting >=0.5%), MAH grafted ethene octene copolymer (POE) (percent grafting >=0.5%), MAH graft phenylethene-ethylene-butylene, Styrene block copolymer (SEBS) (percent grafting >=0.5%), GMA (GMA) grafting POE (percent grafting >=0.5%), and addition is 3-5%.Wherein, MAH Maleated SEBS (percent grafting >=0.5%) is preferably.In described B layer, described chain extender is selected from carbodiimides or polycarbodiimide, and addition is 1-2%.In described B layer, described nucleator is selected from the NA-10 of the Millad3988 of Milliken company of U.S. production, the NU-100 of the new Japanese Chemical Industry production of Japan or the production of Japanese rising sun electrification company, and addition is 1-1.5%.In described B layer, described dispersant is polyethylene glycol (PEG), addition is 1-1.5%.The molecular weight of described polyethylene glycol (PEG) is 20000-40000.Described white reflective polyester film thickness is 188 μm.In described white reflective polyester film, A layer thickness accounts for gross thickness 5.5-7%, and B layer thickness accounts for gross thickness 86-89%.Further, reflectivity >=97.8% of described white reflective polyester film, deflection >=14.0cm.
Further, reflectivity >=98.4% of described white reflective polyester film, deflection >=14.1cm.
The present invention also provides the preparation method of above-mentioned white reflective polyester film, and described preparation method comprises the steps:
(1) granulation: by mylar, incompatible resin, inorganic particulate, toughened resin, chain extender, nucleator and dispersant evenly and carry out twin-screw mixer granulation and obtain polyester functional agglomerate; Wherein, mylar 25-60%, inorganic particulate 15-67%, incompatible resin 15-30%, toughened resin 4-10%, chain extender 2-4%, nucleator 1-3% and dispersant 1-3%;
(2) slab: adopt three-layer co-extruded technique; For B layer, the polyester functional agglomerate that mylar and step (1) obtain is mixed by proportioning, carries out the three-layer co-extruded fusion plastification of ABA, curtain coating slab afterwards;
(3) stretching film forming: the slab that step (2) obtains is carried out longitudinal stretching, cross directional stretch, thermal finalization, rolling and packaging, obtains white reflective polyester film.
Further, in above-mentioned preparation method, the polyester functional agglomerate that mylar and step (1) obtain is mixed by proportioning 1-3:1-3.
Further, in above-mentioned step (2), the raw material of A layer comprises mylar and inorganic particulate.
Further, preparing polyester functional agglomerate double screw extruder used each district temperature is 220-280 DEG C.Further, each district temperature is respectively 220 DEG C, 225 DEG C, 240 DEG C, 250 DEG C, 260 DEG C, 270 DEG C, 280 DEG C, 270 DEG C, 265 DEG C.Engine speed is 200-800rpm, and strainer screen aperture is 20-100 μm.
Further, in step described in slab, baking temperature is 140-170 DEG C, and drying time is 4-6h, and cooling slab temperature is 15-20 DEG C.
Further, in stretching film formation step, longitudinal drawing temperature is 80-95 DEG C, and longitudinal stretching is than being 2.5-3.2, and transverse drawing temperature is 100-125 DEG C, and cross directional stretch is than being 2.8-3.2, and heat setting temperature is 250-280 DEG C, and heat-setting time is 0.5-2min.
Compared with the existing reflectance coating for backlight in display screen, white reflective polyester film provided by the invention has higher reflectivity and deflection simultaneously, and has higher hot strength, lower percent thermal shrinkage, and combination property is better, applied widely.
Accompanying drawing explanation
Fig. 1 is the structural representation of white reflective polyester film provided by the invention.
Detailed description of the invention
As shown in Figure 1, the invention provides a kind of white reflective polyester film, described white reflective polyester film is ABA three-decker, and wherein, the A layer in described white reflective polyester film is made up of mylar and inorganic particulate 1; Have oval foam structure 2 in the B layer of described white reflective polyester film, the major diameter of oval shaped cells is 0.05-3 μm, and the minor axis of oval shaped cells is 0.01-1 μm.Have circular resin particle 3 in described abscess 2, described resin particle 3 has nucleocapsid structure, and the diameter of core is 0.01-1 μm, and the thickness of shell is 0.01-0.1 μm; The density of described abscess is 1-10 ten thousand/cm
3, the thickness of described white reflective polyester film is 50-350 μm.
The preparation method of white reflective polyester film provided by the invention comprises the steps: (1) granulation: by mylar, incompatible resin, inorganic particulate, toughened resin, chain extender, nucleator and dispersant evenly and carry out twin-screw mixer granulation and obtain polyester functional agglomerate, mylar 25-60%, inorganic particulate 15-67%, incompatible resin 15-30%, toughened resin 4-10%, chain extender 2-4%, nucleator 1-3% and dispersant 1-3%; (2) slab: adopt three-layer co-extruded technique; For B layer, the polyester functional agglomerate that mylar and step (1) obtain is mixed by proportioning, carries out the three-layer co-extruded fusion plastification of ABA, curtain coating slab afterwards; (3) stretching film forming: the slab that step (2) obtains is carried out longitudinal stretching, cross directional stretch, thermal finalization, rolling and packaging, obtains white reflective polyester film.
In above-mentioned steps (1), preparing polyester functional agglomerate double screw extruder used each district temperature is 240-280 DEG C, and engine speed 200-800rpm, strainer screen aperture is 20-100 μm.
In above-mentioned steps (2), in slab step, baking temperature is 140-170 DEG C, and drying time is 4-6h, and cooling slab temperature is 15-20 DEG C.
In above-mentioned steps (3), in stretching film formation step, longitudinal drawing temperature is 80-95 DEG C, longitudinal stretching is than being 2.5-3.2, and transverse drawing temperature is 100-125 DEG C, and cross directional stretch is than being 2.8-3.2, heat setting temperature is 250-280 DEG C, and heat-setting time is 0.5-2min.
The white reflective polyester film that the present invention prepares, test by the following method:
Hot strength and elongation at break: according to GB/T1040-2006 standard, adopt the INSTRON universal testing machine that Instron Corporation of the U.S. produces, the hot strength of test reflectance coating and elongation at break.
Percent thermal shrinkage: according to GB/T 13542.4-2009 standard, is placed on half an hour in 85 DEG C of baking ovens by sample, measure the percent thermal shrinkage of reflectance coating.
Reflectivity: according to GB/T3979-2008 standard, adopt ColorQuest XE spectrophotometric color measurement instrument (Hunterlab Inc.), under D65 light conditions, by its reflectivity of integrating sphere d/8 ° structured testing, reflectivity data is the weighted average of 400-700nm every the reflectivity of 10nm wavelength, the energy distribution curve of the corresponding D65 light source of weights.
Deflection: get the long 30cm of reflectance coating, wide 1cm, at 85 DEG C, after 5min thermal finalization, 5kg counterweight is pushed down one end of reflectance coating, one end hangs on the side of horizontal table top in addition, and the horizontal range measuring film end and vertical table surface is deflection.Measure the horizontal range obtained longer, namely numerical value is higher, illustrates that the deflection of reflectance coating is better.
Embodiment 1
White reflective polyester film provided by the invention, A layer proportioning is 99%PET section, 1% silicon dioxide granule.B layer proportioning is 66%PET section, inherent viscosity 0.68dL/g, 15% rutile type titanium white, 10% polymethylpentene, 5%MAH Maleated SEBS (percent grafting >=0.5%), 2% carbodiimides, 1%Millad3988 (Milliken company), 1%PEG (molecular weight 20000), described percentage is weight percentage.A layer thickness accounts for gross thickness 6%, B layer thickness and accounts for gross thickness 88%.Gained reflectance coating thickness is 188 μm, and correlated performance is in table 1.
Embodiment 2
White reflective polyester film provided by the invention, A layer proportioning is 99%PET section, 1% silicon dioxide granule.B layer proportioning is 56%PET section, inherent viscosity 0.68dL/g, 25% barium sulfate, 10% polymethylpentene, 5%MAH Maleated SEBS (percent grafting >=0.5%), 2% carbodiimides, 1%Millad3988 (Milliken company), 1%PEG (molecular weight 20000), described percentage is weight percentage.A layer accounts for gross thickness 6%, B layer and accounts for gross thickness 88%.Gained reflectance coating thickness is 188 μm, and correlated performance is in table 1.
Embodiment 3
White reflective polyester film provided by the invention, A layer proportioning is 98.5%PET section, 1.5% silicon dioxide granule.B layer proportioning is 64%PET section, inherent viscosity 0.68dL/g, 15% anatase thpe white powder, 15% cyclic olefin polymer, 3%MAH grafting POE (percent grafting >=0.5%), 1% polycarbodiimide, 1%Millad3988 (Milliken company), 1%PEG (molecular weight 40000), described percentage is weight percentage.A layer accounts for gross thickness 6.5%, B layer and accounts for gross thickness 87%.Gained reflectance coating thickness is 188 μm, and correlated performance is in table 1.
Embodiment 4
White reflective polyester film provided by the invention, A layer proportioning is 98.5%PET section, 1.5% silicon dioxide granule.B layer proportioning is 67%PBT section, inherent viscosity 0.80dL/g, 10% calcium carbonate, 15% polypropylene, 3%GMA grafting POE (percent grafting >=0.5%), 2% carbodiimides, 1.5%NU-100 (new Japanese Chemical Industry), 1.5%PEG (molecular weight 30000), described percentage is weight percentage.A layer accounts for gross thickness 7%, B layer and accounts for gross thickness 86%.Gained reflectance coating thickness is 188 μm, and correlated performance is in table 1.
Embodiment 5
White reflective polyester film provided by the invention, A layer proportioning is 98%PET section, 2% silicon dioxide granule.B layer proportioning is 59%PBT section, inherent viscosity 0.80dL/g, 15% zinc oxide, 20% polypropylene, 3%GMA grafting POE (percent grafting >=0.5%), 1% polycarbodiimide, 1%NU-100 (new Japanese Chemical Industry), 1%PEG (molecular weight 30000), described percentage is weight percentage.A layer accounts for gross thickness 5.5%, B layer and accounts for gross thickness 89%.Gained reflectance coating thickness is 188 μm, and correlated performance is in table 1.
Embodiment 6
White reflective polyester film provided by the invention, A layer proportioning is 98%PET section, 2% silicon dioxide granule.B layer proportioning is 64%PEN section, inherent viscosity 0.80dL/g, 15% aluminium oxide, 15% polyethylene, 3%MAH grafting LDPE (percent grafting >=0.5%), 1% polycarbodiimide, 1%NA-10 (Japanese rising sun electrification), 1%PEG (molecular weight 50000), described percentage is weight percentage.A layer accounts for gross thickness 5.5%, B layer and accounts for gross thickness 89%.Gained reflectance coating thickness is 188 μm, and correlated performance is in table 1.
The eastern beautiful product type of comparative example 1 is E81C.
Table 1 embodiment 1-6 gained white reflective polyester film and comparative example performance test table
Embodiment 7
The invention provides a kind of white reflective polyester film, this film is ABA three-decker, and wherein, the A layer in described white reflective polyester film is made up of mylar and inorganic particulate, and A layer proportioning is 99.9%PET section, 0.1% silicon dioxide granule;
Described B layer is made up of mylar, inorganic particulate, incompatible resin, toughened resin, chain extender, nucleator and dispersant; In described B layer, the addition of PETG is 40%, the addition of rutile titanium dioxide is 50%, polyacrylic addition is 5%, the addition of maleic anhydride (MAH) grafted high density polyethylene (HDPE) (percent grafting >=0.5%) is 0.5%, and the addition of carbodiimides is the addition of 0.5%, Millad3988 is 2%, the addition of polypropylene wax is 2%, and described percentage is weight percentage.Described A layer accounts for gross thickness 4%, B layer and accounts for gross thickness 92%.
Have oval foam structure in the B layer of described white reflective polyester film, the major diameter of oval shaped cells is 0.05-1 μm, and the minor axis of oval shaped cells is 0.01-0.5 μm.Have circular resin particle in described abscess, described resin particle has nucleocapsid structure, and the diameter of core is 0.01-0.05 μm, and the thickness of shell is 0.01-0.05 μm; The density of described abscess is 10,000/cm
3, the thickness of described reflectance coating is 50 μm.
Embodiment 8
The invention provides a kind of white reflective polyester film, this film is ABA three-decker, and wherein, the A layer in described white reflective polyester film is made up of mylar and inorganic particulate, and A layer proportioning is 50%PET section, 50% silicon dioxide granule;
Described B layer is made up of mylar, inorganic particulate, incompatible resin, toughened resin, chain extender, nucleator and dispersant; In described B layer, the addition of polybutylene terephthalate (PBT) is 90%, the addition of zinc oxide is 0.1%, the addition of polystyrene is 9%, the addition of MAH grafted linear low-density polyethylene (LDPE) (percent grafting >=0.5%) is 0.6%, and the addition of carbodiimides is the addition of 0.1%, NU-100 is 0.1%, the addition of polypropylene wax is 0.1%, and described percentage is weight percentage.Described A layer accounts for gross thickness 15%, B layer and accounts for gross thickness 70%.
Have oval foam structure in the B layer of described white reflective polyester film, the major diameter of oval shaped cells is 1-2 μm, and the minor axis of oval shaped cells is 0.5-1 μm.Have circular resin particle in described abscess, described resin particle has nucleocapsid structure, and the diameter of core is 0.06-0.5 μm, and the thickness of shell is 0.01-0.1 μm; The density of described abscess is 60,000/cm
3, the thickness of described reflectance coating is 350 μm.
Embodiment 9
The invention provides a kind of white reflective polyester film, this film is ABA three-decker, and wherein, the A layer in described white reflective polyester film is made up of mylar and inorganic particulate, and A layer proportioning is 80%PET section, 20% silicon dioxide granule;
Described B layer is made up of mylar, inorganic particulate, incompatible resin, toughened resin, chain extender, nucleator and dispersant; In described B layer, addition in PEN is 70%, the addition of aluminium oxide is 2%, the addition of polymethylstyrene is 20%, the addition of MAH grafted ethene octene copolymer (POE) (percent grafting >=0.5%) is 5%, and the addition of carbodiimides is the addition of 1%, NA-10 is 1%, the addition of polyethylene glycol (molecular weight is 5000) is 1%, and described percentage is weight percentage.Described A layer accounts for gross thickness 10%, B layer and accounts for gross thickness 80%.
Have oval foam structure in the B layer of described white reflective polyester film, the major diameter of oval shaped cells is 0.08-1 μm, and the minor axis of oval shaped cells is 0.02-0.3 μm.Have circular resin particle in described abscess, described resin particle has nucleocapsid structure, and the diameter of core is 0.06-0.2 μm, and the thickness of shell is 0.01-0.06 μm; The density of described abscess is 40,000/cm
3, the thickness of described reflectance coating is 188 μm.
Embodiment 10
The invention provides a kind of white reflective polyester film, this film is ABA three-decker, and wherein, the A layer in described white reflective polyester film is made up of mylar and inorganic particulate, and A layer proportioning is 70%PET section, 30% silicon dioxide granule;
Described B layer is made up of mylar, inorganic particulate, incompatible resin, toughened resin, chain extender, nucleator and dispersant; In described B layer, the addition of PEN is 56%, the addition of mica is 25%, poly addition is 13%, the addition of MAH grafted ethene octene copolymer (POE) (percent grafting >=0.5%) is 3%, and the addition of polycarbodiimide is the addition of 1%, NU-100 is 1%, the addition of polyethylene glycol (molecular weight is 50000) is 1%, and described percentage is weight percentage.Described A layer accounts for gross thickness 7%, B layer and accounts for gross thickness 86%.
Have oval foam structure in the B layer of described white reflective polyester film, the major diameter of oval shaped cells is 1-3 μm, and the minor axis of oval shaped cells is 0.05-1 μm.Have circular resin particle in described abscess, described resin particle has nucleocapsid structure, and the diameter of core is 0.05-1 μm, and the thickness of shell is 0.05-0.1 μm; The density of described abscess is 80,000/cm
3, the thickness of described reflectance coating is 188 μm.
Embodiment 11
The invention provides a kind of white reflective polyester film, this film is ABA three-decker, and wherein, the A layer in described white reflective polyester film is made up of mylar and inorganic particulate, and A layer proportioning is 85%PET section, 15% silicon dioxide granule;
Described B layer is made up of mylar, inorganic particulate, incompatible resin, toughened resin, chain extender, nucleator and dispersant; In described B layer, the addition of PET is 65%, the addition of anatase thpe white powder is 15%, the addition of polystyrene is 10%, the addition of MAH graft phenylethene-ethylene-butylene, Styrene block copolymer (SEBS) (percent grafting >=0.5%) is 5%, and the addition of polycarbodiimide is the addition of 2%, NA-10 is 1.5%, the addition of polyethylene glycol (molecular weight is 10000) is 1.5%, and described percentage is weight percentage.Described A layer accounts for gross thickness 6%, B layer and accounts for gross thickness 88%.
Have oval foam structure in the B layer of described white reflective polyester film, the major diameter of oval shaped cells is 0.05-1.5 μm, and the minor axis of oval shaped cells is 0.01-0.8 μm.Have circular resin particle in described abscess, described resin particle has nucleocapsid structure, and the diameter of core is 0.01-0.04 μm, and the thickness of shell is 0.01-0.02 μm; The density of described abscess is 100,000/cm
3, the thickness of described reflectance coating is 188 μm.
Embodiment 12
The invention provides a kind of white reflective polyester film, this film is ABA three-decker, wherein,
A layer in described white reflective polyester film is made up of mylar and inorganic particulate, and A layer proportioning is 90%PET section, 10% silicon dioxide granule;
Described B layer is made up of mylar, inorganic particulate, incompatible resin, toughened resin, chain extender, nucleator and dispersant; In described B layer, the addition of PET is 60%, kaolinic addition is 20%, the addition of polybutene is 14%, the addition of GMA (GMA) grafting POE (percent grafting >=0.5%) is 3%, and the addition of polycarbodiimide is the addition of 1%, Millad3988 is 1%, the addition of polyethylene glycol (molecular weight is 30000) is 1%, and described percentage is weight percentage.Described A layer accounts for gross thickness 6.5%, B layer and accounts for gross thickness 87%.
Have oval foam structure in the B layer of described white reflective polyester film, the major diameter of oval shaped cells is 2-3 μm, and the minor axis of oval shaped cells is 0.06-1 μm.Have circular resin particle in described abscess, described resin particle has nucleocapsid structure, and the diameter of core is 0.05-1 μm, and the thickness of shell is 0.03-0.1 μm; The density of described abscess is 70,000/cm
3, the thickness of described reflectance coating is 188 μm.
Table 2 embodiment 7-12 gained white reflective polyester film performance test table
Can be drawn by the data shown in above-mentioned table 1 and table 2, white reflective polyester film provided by the invention has higher reflectivity and deflection simultaneously, and has higher hot strength, lower percent thermal shrinkage, and combination property is better, applied widely.Especially, the white reflective polyester film that embodiment of the present invention 1-6 provides has higher reflectivity and deflection simultaneously.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Every equalization done according to content of the present invention changes and modifies, and is all encompassed in the scope of the claims of the present invention.
Claims (10)
1. a white reflective polyester film, is characterized in that, described white reflective polyester film is ABA three-decker, and white polyester film thickness is 50-350 μm; Wherein, A layer thickness accounts for gross thickness 4-15%, and B layer thickness accounts for gross thickness 70-92%; A layer in described white reflective polyester film is made up of mylar and inorganic particulate, and in A layer, the content of mylar is 50-99.9%, and the content of inorganic particulate is 0.1-50%; Described B layer is made up of mylar, inorganic particulate, incompatible resin, toughened resin, chain extender, nucleator and dispersant; In described B layer, the addition of described mylar is 40-90%, the addition of described inorganic particulate is 0.1-50%, the addition of described incompatible resin is 5-20%, the addition of described toughened resin is 0.5-5%, and the addition of described chain extender is 0.1-2%, and the addition of described nucleator is 0.1-2%, the addition of described dispersant is 0.1-2%, and described percentage is weight percentage.
2. white reflective polyester film according to claim 1, it is characterized in that, in described B layer, described mylar is selected from the one in PETG, polybutylene terephthalate (PBT), PEN, and addition is 56-67%.
3. white reflective polyester film according to claim 1, it is characterized in that, in described B layer, described inorganic particulate be selected from calcium carbonate, zinc oxide, barium sulfate, rutile titanium dioxide, anatase thpe white powder, aluminium oxide, mica, kaolin one or both, the particle diameter of described inorganic particulate is 0.1-2.0 μm; The addition of described inorganic particulate is 10-25%.
4. white reflective polyester film according to claim 1, it is characterized in that, in described B layer, described incompatible resin is selected from the one in polymethylpentene, polypropylene, polyethylene, polybutene, cyclic olefine copolymer, polystyrene, polymethylstyrene, and addition is 10-20%.
5. white reflective polyester film according to claim 1, it is characterized in that, in described B layer, described toughened resin is selected from maleic anhydride (MAH) grafted high density polyethylene (HDPE) (percent grafting >=0.5%), MAH grafted linear low-density polyethylene (LDPE) (percent grafting >=0.5%), MAH grafted ethene octene copolymer (POE) (percent grafting >=0.5%), MAH graft phenylethene-ethylene-butylene, Styrene block copolymer (SEBS) (percent grafting >=0.5%), one in GMA (GMA) grafting POE (percent grafting >=0.5%), addition is 3-5%.
6. white reflective polyester film according to claim 1, it is characterized in that, in described B layer, described chain extender is selected from the one in the polymer chain extender of epoxies, the polymer chain extender of isocyanates or acylamide polymer chain extender, and addition is 1-2%.
7. white reflective polyester film according to claim 1, is characterized in that, in described B layer, described nucleator is selected from the one in sorbose alcohols or organic phosphate, and addition is 1-1.5%; Described dispersant is selected from the one in polyethylene glycol (PEG), polypropylene wax, and addition is 1-1.5%.
8. white reflective polyester film according to claim 1, is characterized in that, in described A layer, described mylar is PETG, and addition is 98-99%; Described inorganic particulate is silicon dioxide granule, and addition is 1-2%;
In described B layer, described mylar is selected from the one in PETG (PET), polybutylene terephthalate (PBT) (PBT), PEN (PEN), and addition is 56-67%; The inherent viscosity of described mylar is 0.68-0.80dL/g;
In described B layer, described inorganic particulate is selected from the one in calcium carbonate, zinc oxide, barium sulfate, rutile titanium dioxide, anatase thpe white powder, aluminium oxide, and the particle diameter of described inorganic particulate is 0.1-2.0 μm; The addition of described inorganic particulate is 10-25%;
In described B layer, described incompatible resin is selected from the one in polymethylpentene, polypropylene, polyethylene, cyclic olefine copolymer, and addition is 10-20%;
In described B layer, described toughened resin is selected from the one in MAH grafted linear low-density polyethylene (LDPE) (percent grafting >=0.5%), MAH grafted ethene octene copolymer (POE) (percent grafting >=0.5%), MAH graft phenylethene-ethylene-butylene, Styrene block copolymer (SEBS) (percent grafting >=0.5%), GMA (GMA) grafting POE (percent grafting >=0.5%), and addition is 3-5%;
In described B layer, described chain extender is selected from carbodiimides or polycarbodiimide, and addition is 1-2%;
In described B layer, described nucleator is selected from the NA-10 of the Millad3988 of Milliken company of U.S. production, the NU-100 of the new Japanese Chemical Industry production of Japan or the production of Japanese rising sun electrification company, and addition is 1-1.5%;
In described B layer, described dispersant is polyethylene glycol (PEG), addition is 1-1.5%, and the molecular weight of described polyethylene glycol (PEG) is 20000-40000.
9. white reflective polyester film according to claim 1, it is characterized in that, there is in the B layer of described white reflective polyester film oval foam structure, the major diameter of oval shaped cells is 0.05-3 μm, the minor axis of oval shaped cells is 0.01-1 μm, and have circular resin particle in described abscess, described resin particle has nucleocapsid structure, the diameter of core is 0.01-1 μm, and the thickness of shell is 0.01-0.1 μm.
10. according to the preparation method of the white reflective polyester film one of claim 1-9 Suo Shu, it is characterized in that, described preparation method comprises the steps:
(1) granulation: by mylar, incompatible resin, inorganic particulate, toughened resin, chain extender, nucleator and dispersant evenly and carry out twin-screw mixer granulation and obtain polyester functional agglomerate; Wherein, mylar 25-60%, inorganic particulate 15-67%, incompatible resin 15-30%, toughened resin 4-10%, chain extender 2-4%, nucleator 1-3% and dispersant 1-3%;
(2) slab: adopt three-layer co-extruded technique; For B layer, the polyester functional agglomerate that mylar and step (1) obtain is mixed by proportioning, carries out the three-layer co-extruded fusion plastification of ABA, curtain coating slab afterwards;
(3) stretching film forming: the slab that step (2) obtains is carried out longitudinal stretching, cross directional stretch, thermal finalization, rolling and packaging, obtains white reflective polyester film.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510022979.7A CN104608446B (en) | 2015-01-16 | 2015-01-16 | A kind of white reflective mylar and preparation method thereof |
| KR1020150155468A KR101803610B1 (en) | 2015-01-16 | 2015-11-06 | White reflective polyester film and preparation method thereof |
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| CN201510022979.7A CN104608446B (en) | 2015-01-16 | 2015-01-16 | A kind of white reflective mylar and preparation method thereof |
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| CN104608446A true CN104608446A (en) | 2015-05-13 |
| CN104608446B CN104608446B (en) | 2016-12-07 |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20160088786A (en) | 2016-07-26 |
| CN104608446B (en) | 2016-12-07 |
| KR101803610B1 (en) | 2017-12-28 |
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Address after: Qingfeng Road, Jiangbei District 315000 in Zhejiang city of Ningbo province No. 999 Applicant after: Ningbo, Changyang, Polytron Technologies Inc Address before: 315031 Zhejiang province Jiangbei District of Ningbo City Green Road Zhu Xiang (1) - (4) Applicant before: Ningbo Changyang Technology Co., Ltd. |
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Application publication date: 20150513 Assignee: Ningbo Changlong New Material Co.,Ltd. Assignor: NINGBO SOLARTRON TECHNOLOGY Co.,Ltd. Contract record no.: X2021330000199 Denomination of invention: The invention relates to a polyester film for white reflection and a preparation method thereof Granted publication date: 20161207 License type: Common License Record date: 20210831 |
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