CN103360748A - PC composition for optical reflector film and preparation method of the optical reflector film - Google Patents
PC composition for optical reflector film and preparation method of the optical reflector film Download PDFInfo
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- CN103360748A CN103360748A CN2013103312621A CN201310331262A CN103360748A CN 103360748 A CN103360748 A CN 103360748A CN 2013103312621 A CN2013103312621 A CN 2013103312621A CN 201310331262 A CN201310331262 A CN 201310331262A CN 103360748 A CN103360748 A CN 103360748A
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Abstract
The invention discloses a PC composition for an optical reflector film and a preparation method of the optical reflector film. The PC composition comprises, by weight, 42-77 parts of polycarbonate and 23-58 parts of a reflection masterbatch. The reflection masterbatch comprises, by weight, 50-60 parts of titanium dioxide, 35-45 parts of a polyester and 5-10 parts of a compatible dispersing assistant. The preparation method of the optical reflector film from the PC composition comprises the following steps of extrusion, molding by a pair of molding rollers, cooling and setting. Compared with the prior art, the optical reflector film has good reflection effects, a simple structure, stable product performances and a low cost.
Description
Technical field
The present invention relates to a kind ofly produce polycarbonate (PC) composition that the optical reflection plastics film is used, and use this polycarbonate (PC) composition to prepare the method for optical reflection plastics film.
Background technology
All used reflector plate in the backlight module that the LCD/LED indicating meter is used at present, it mainly is to cover the luminescent lamp of cold-cathode tube or the light source of LED leaks outside, light source can be reflected back again, can concentrate front projection, briliancy and the brightness of screen have been increased like this, and can promote visual angle and uniformity coefficient, in the situation that does not increase light source, improve the utilization benefit of light.The widely used reflectance coating of industry consists essentially of reflective metal film, surface blister tapetum lucidum and three kinds of different types of matrix particle tapetum lucidum now, it is reflective that described reflective metal film utilizes metal level to carry out, its principle is that the outer shell electronics (unbound electron) in the conductor material is not fettered by nucleus fully, when being subject to light-wave irradiation, the electric field of light wave makes this unbound electron absorb the energy of light, thereby by vibrating with the light same frequency, in oscillatory process, emit again the light with original light same frequency, be reflection of light.The perveance of metal is higher, and reflectivity is higher, so utilize the materials such as gold and silver, aluminium, copper to make reflective metal film in the prior art more.For reflective metal film, its advantage is that preparation technology is simple, and the wavelength region of work is wide.Shortcoming is that light loss is large, and reflectivity can not be very high.Performance can progressively reduce because the materials such as aluminium, silver, copper are easy to oxidation in air simultaneously, and the obvious cost of non-oxidizing gold copper-base alloy is too high.
In the industry cycle further improve for the reflectivity that makes reflective metal film, also there is manufacturer to take to add in the outside of film plating which floor certain thickness dielectric layer (generally being resin), jointly form the inter metal dielectric reflectance coating with reflective metal film, common method is to adopt the methods such as evaporation, sputter, ion plating to make metal combine to form plane of reflection with the plastic, transparent base material.The method of even now also has certain effect to a certain extent, but general only effective to the light of a certain specific wavelength by the reflectivity that dielectric layer increases, the reflection of light rate of this wavelength has increased, might make corresponding reduction of reflection of light rate of another wavelength, such method is not that entire spectrum is effective, obviously can be subject to larger limitation for this reason, in addition, no matter be evaporation, sputter, or ion plating, all will raise the cost significantly, reduce production efficiency, and dielectric layer add the also complexity comparatively of control of plate quality, and directly can affect the quality of the finished product.
The surface blister tapetum lucidum is a kind of universal reflecting film product that numerous manufacturers use, it adopts transparent resin material, such as PET (polyethylene terephthalate) or PC(polycarbonate) as base material, on base material, form again the very thin trickle foaming layer of one deck by processing, the alveolate rete people that are with that this one deck is very thin are referred to as bubble Porous rete, the diameter of bubble only has several micron orders, bubble is more thin less, density is higher, then reflectivity is just higher, for reaching the minimizing aberration, improve the purposes such as luminous reflectance homogeneity, some producer also adds titanium dioxide in base material, barium sulfate, the inorganic particulates such as silicon-dioxide are improved.
At some reflectivity being required is not during very high some are used, then also have with some and do not add trickle foaming layer and the PET that just adds inorganic particulate in base material forms the product of reflectance coating, Here it is so-called matrix particle tapetum lucidum, the problem of this reflectance coating is that the reflectivity index is lower, can not satisfy high-end application needs.
In a word, there is in the prior art the problem of the reflectance coating existence of better reflectivity to be that product structure is complicated, processed complex, production efficiency is low.The major cause that problem forms is that above-mentioned reflectance coating all need to carry out processing treatment in addition on separate substrates/base material in order to reach the light wave reflection characteristic, such as plating processed, coating, foaming etc., so this series products mostly is multilayered structure, and complex structure.This series products processed complex and operation is also more, production efficiency is low; The 2nd, quality product unstable, its major cause is that the operation of before-mentioned products is various and product structure is complicated, this has directly caused the unstable of quality product relatively high.For example, the high employing PET of existing market occupation rate adds the reflectance coating that little foaming technique is made, it reaches uvioresistant by add the particles such as titanium dioxide and barium sulfate in base material, suppress aberration, stable, improve the effect such as reflectivity, whether but the size of these inorganic particulates, disperse evenly etc. all can the quality of reflectance coating to be impacted, any one link goes wrong and all might cause scrapping of entire block; For another example because aforesaid reflectance coating is multilayered structure mostly, bonding state between layers, evaporation sputter whether the many factors such as even on the form of quality impact of the finished product.For porous film, what affect quality product also comprises the many factors such as foaming quality such as surface blister density; Its three is that product cost is higher, the one, and the production cost of used base material/substrate is higher.Such as the reflectance coating of using now maximum little foaming of PET+, its base material normal operation PET (polyethylene terephthalate) film, such film need to adopt biaxial stretch-formed technology when producing, such production line drops into huge, and cost is higher, is substantially monopolized by Japan and Korea S manufacturer at present, thereby so that base material/substrate cost is higher, such reflecting film structure is complicated in addition, and processed complex, fraction defective are relatively high also to be to cause one of higher reason of cost.
Simultaneously, the domestic electronic product of LCD TV that comprises will continue the maintenance rapid growth future, add the application demand on some other product, the demand of tapetum lucidum can will further increase by future, the optics reflecting film of can provide obviously that a kind of reflecting effect is good, simple in structure, product performance are stable, cost is low has great significance.In sum, obviously prior art has further improved necessity.
Summary of the invention
The object of the invention is to a kind of optics reflecting film with the PC composition and use this PC composition to prepare the method for optics reflecting film, the problem that exists to overcome prior art.
A kind of optics reflecting film PC composition of the present invention, it is composed as follows to it is characterized in that counting by weight it:
Polycarbonate 42-77 part
Reflection masterbatch 23-58 part
Wherein: described reflection masterbatch counts by weight that it is composed as follows:
Titanium dioxide 50-60 part
Polyester 35-45 part
Compatible dispersing auxiliary 5-10 part
Described polyester is at least a in polyethylene terephthalate (PET), polybutylene terephthalate (PBT), the polyarylester;
Described compatible dispersion helps at least a in polyethylene low-molecular-weight wax, stearate, the erucicamide.
In the present invention, described titanium dioxide, meter accounts for 50-60 part by weight in the reflection masterbatch, and its effect is a covering, so that whole material presents White-opalescent, the 2nd, utilize the scattering of light effect to stop the UV radiation, can protect UVA or UVB.It is good that titanium dioxide median size (diameter) is preferably 300-400nm, is difficult for this moment condensing, and uniformly dispersed good, excellent in light-resistance also can play luminous reflectance effect to a certain extent.
A kind of preparation method who uses aforesaid polycarbonate compositions to prepare optics reflecting film is characterized in that being made of following steps:
Raw material is prepared: meter is prepared polycarbonate 42-77 part and reflection masterbatch 23-58 part by weight, and wherein said reflection masterbatch is counted by weight and consisted of titanium dioxide 50-60 part, polyester 35-45 part, compatible dispersing auxiliary 5-10 part;
Dry: each raw material is the feeder by separately respectively, sends into stirrer and stirs, and wind is delivered to the resin retention tank again, and successively in crystallizer and moisture eliminator the warm air with drying carry out drying treatment, drying temperature 125-135 ℃, 4-6 hour time of drying;
Extrude: the raw material after the drying treatment is sent into and is carried out melting in the forcing machine and extrude from the die lip of T mould, make it in the form of sheets melt, extruder temperature: 230 ℃～270 ℃, runner temperature: 230 ℃～270 ℃, the T die temperature: 230 ℃～300 ℃, Melt Pump rotating speed: 2600-2650rmp;
Moulding: use two that made by metal or rubber and smooth surfaces or be with textured a pair of shaping roller to sheet melt calendering formation, bath surface is presented include but not limited to smooth, frosted, inferior light, wire-drawing effect, described shaping roller temperature is 100～135 ℃;
Cooling, typing: make sheet melt after the moulding fast from utilizing the running roller process of uninterrupted water-cooled refrigeration, cooling forms film after the fixed surface shape simultaneously.Chill-roll temperature 90-110 ℃;
Draw rolling: film is drawn from running roller adopt simultaneously the automatic thickness tester thickness measuring, and thickness measuring is fed back to Controlling System, adjust extrusion capacity and die gap size by Controlling System according to the thickness measuring data;
Overlap, rolling: excision film edge material is tubular coiled material or sheet material with film rolling after the side cut.
As preferably, one of them is inferior Seterolithography running roller for described a pair of shaping roller, and another is the frosted shaping roller, and the optical reflection plastics film that forms so simultaneously is frosting, and another side is dull surface, and better reflecting effect is arranged.
The optics reflecting film that uses polycarbonate compositions of the present invention to adopt simultaneously method of the present invention to prepare, adopt the spectrophotometer CM-5 of Konica Minolta company to test, reflectivity can reach about 95%, reach the index of existing external superior product fully, cost only has 1/2 of external superior product simultaneously, and obvious purpose of the present invention is achieved.
The tool present embodiment
The invention will be further described below with reference to preferred embodiment of the present invention.
Embodiment: the prescription of each embodiment is shown in table 1, and the prescription of described each embodiment is by weight meter.
Table 1: embodiment one to embodiment three prescription
Wherein the embodiment 1 preparation 0.188mm back side is dull surface, and the front is the optics reflecting film of frosting; The embodiment 2 preparation 0.225mm back sides are dull surface, and the front is the optics reflecting film of frosting; The embodiment 3 preparation 0.500mm back sides are dull surface, and the front is the optics reflecting film of frosting.
The polycarbonate compositions of aforementioned each embodiment of use prepares the preparation method of optical reflection plastics film, is made of following steps:
Raw material is prepared: prepare each raw material by the by weight umber shown in the table 1;
Dry: each raw material passes through respectively feeder separately, sends into stirrer and stirs, and wind is delivered to the resin retention tank again, and priority warm air with drying in crystallizer and moisture eliminator carries out drying treatment, 130 ℃ of drying temperatures, 5 hours time of drying;
Extrude: the raw material after the drying treatment is sent into and is carried out melting in the forcing machine and extrude from the die lip of T mould, makes it in the form of sheets melt, extruder temperature: 250 ℃, and the runner temperature: 255 ℃, the T die temperature: 260 ℃, Melt Pump rotating speed: 2610rmp;
Moulding: use two that made by metal or rubber and smooth surfaces or be with textured a pair of shaping roller to sheet melt calendering formation, one of them is inferior Seterolithography running roller for described a pair of shaping roller, another is the frosted shaping roller, make in the form of sheets that bath surface presents positive frosted, reverse side dumb light effect, described shaping roller temperature is 120 ℃;
Cooling, typing: make sheet melt after the moulding fast from utilizing the running roller process of uninterrupted water-cooled refrigeration, cooling forms film after the fixed surface shape simultaneously.100 ℃ of chill-roll temperature;
Traction rolling: film is drawn the while by the automatic thickness tester thickness measuring from running roller, and thickness measuring is fed back to Controlling System, adjust extrusion capacity and die gap size by Controlling System according to the thickness measuring data;
Overlap, rolling: excision film edge material is tubular coiled material or sheet material with film rolling after the side cut.
Adopt the Konica CM-5 of Minolta company spectrophotometer that the optics reflecting film of each embodiment is tested, testing light source is the D65 standard light source, the light frequency scope is 360-740 nm, and the wavelength interval is 10nm, and test result is that the reflectivity of the optics reflecting film of embodiment 1 is 94.345; The reflectivity of the optics reflecting film of embodiment 2 is 95.275; The reflectivity of the optics reflecting film of embodiment 3 is 95.865.Fabulous reflecting effect is obviously all arranged.
The above only is the specific embodiment of the present invention.But protection domain of the present invention is not limited to this.Anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention, and therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (3)
1. optics reflecting film PC composition, it is composed as follows to it is characterized in that counting by weight it:
Polycarbonate 42-77 part
Reflection masterbatch 23-58 part
Wherein: described reflection masterbatch counts by weight that it is composed as follows:
Titanium dioxide 50-60 part
Polyester 35-45 part
Compatible dispersing auxiliary 5-10 part
Described polyester is at least a in polyethylene terephthalate (PET), polybutylene terephthalate (PBT), the polyarylester;
Described compatible dispersion helps at least a in polyethylene low-molecular-weight wax, stearate, the erucicamide.
2. a PC composition that adopts claim 1 to limit prepares the optics reflecting film method, it is characterized in that being made of following steps:
Raw material is prepared: meter is prepared polycarbonate 42-77 part and reflection masterbatch 23-58 part by weight, and wherein said reflection masterbatch is counted by weight and consisted of titanium dioxide 50-60 part, polyester 35-45 part, compatible dispersing auxiliary 5-10 part;
Dry: each raw material is the feeder by separately respectively, sends into stirrer and stirs, and wind is delivered to the resin retention tank again, and successively in crystallizer and moisture eliminator the warm air with drying carry out drying treatment, drying temperature 125-135 ℃, 4-6 hour time of drying;
Extrude: the raw material after the drying treatment is sent into and is carried out melting in the forcing machine and extrude from the die lip of T mould, make it in the form of sheets melt, extruder temperature: 230 ℃～270 ℃, runner temperature: 230 ℃～270 ℃, the T die temperature: 230 ℃～300 ℃, Melt Pump rotating speed: 2600-2650rmp;
Moulding: use two that made by metal or rubber and smooth surfaces or be with textured a pair of shaping roller to sheet melt calendering formation, bath surface is presented include but not limited to smooth, frosted, inferior light, wire-drawing effect, described shaping roller temperature is 100～135 ℃;
Cooling, typing: make sheet melt after the moulding fast from utilizing the running roller process of uninterrupted water-cooled refrigeration, cooling forms film after the fixed surface shape simultaneously, and described chill-roll temperature is 90-110 ℃;
Draw rolling: film is drawn from running roller adopt simultaneously the automatic thickness tester thickness measuring, and thickness measuring is fed back to Controlling System, adjust extrusion capacity and die gap size by Controlling System according to the thickness measuring data;
Overlap, rolling: excision film edge material is tubular coiled material or sheet material with film rolling after the side cut.
3. a kind of PC composition that adopts claim 1 to limit according to claim 2 prepares the optics reflecting film method, it is characterized in that one is inferior Seterolithography running roller in the described a pair of shaping roller, and another is the frosted shaping roller.
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| CN201310331262.1A CN103360748B (en) | 2013-08-01 | 2013-08-01 | PC composition for optical reflector film and preparation method of the optical reflector film |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589132A (en) * | 2013-11-26 | 2014-02-19 | 连平长荣塑胶有限公司 | PC composition for optical reflection film, and making method of film |
| CN103724974A (en) * | 2014-01-10 | 2014-04-16 | 西南科技大学 | High-light-reflectivity PC (polycarbonate) film material and preparation method thereof |
| CN103724975A (en) * | 2014-01-10 | 2014-04-16 | 西南科技大学 | High light reflectance PC (polycarbonate) film material and preparation method thereof |
| CN106626427A (en) * | 2017-02-24 | 2017-05-10 | 南通鼎尚电子材料有限公司 | PET film tape production device |
| CN114935851A (en) * | 2022-04-27 | 2022-08-23 | 深圳市南极光电子科技股份有限公司 | Generation process of reflector plate of MiniMicroLED backlight source module |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176229A (en) * | 2013-04-12 | 2013-06-26 | 宁波长阳科技有限公司 | Compound optical reflecting film and preparation method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176229A (en) * | 2013-04-12 | 2013-06-26 | 宁波长阳科技有限公司 | Compound optical reflecting film and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589132A (en) * | 2013-11-26 | 2014-02-19 | 连平长荣塑胶有限公司 | PC composition for optical reflection film, and making method of film |
| CN103724974A (en) * | 2014-01-10 | 2014-04-16 | 西南科技大学 | High-light-reflectivity PC (polycarbonate) film material and preparation method thereof |
| CN103724975A (en) * | 2014-01-10 | 2014-04-16 | 西南科技大学 | High light reflectance PC (polycarbonate) film material and preparation method thereof |
| CN103724975B (en) * | 2014-01-10 | 2017-11-28 | 西南科技大学 | A kind of high light reflectivity PC membrane materials and preparation method thereof |
| CN106626427A (en) * | 2017-02-24 | 2017-05-10 | 南通鼎尚电子材料有限公司 | PET film tape production device |
| CN106626427B (en) * | 2017-02-24 | 2019-04-02 | 南通鼎尚电子材料有限公司 | PET film tape production device |
| CN114935851A (en) * | 2022-04-27 | 2022-08-23 | 深圳市南极光电子科技股份有限公司 | Generation process of reflector plate of MiniMicroLED backlight source module |
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| CN103360748B (en) | 2015-07-08 |
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