CN203658609U - Micro-foaming polyester reflective film - Google Patents
Micro-foaming polyester reflective film Download PDFInfo
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- CN203658609U CN203658609U CN201320841960.1U CN201320841960U CN203658609U CN 203658609 U CN203658609 U CN 203658609U CN 201320841960 U CN201320841960 U CN 201320841960U CN 203658609 U CN203658609 U CN 203658609U
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- foaming layer
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- reflectance coating
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Abstract
The utility model discloses a micro-foaming polyester reflective film. The micro-foaming polyester reflective film comprises a foaming layer and resin layers compounded to the upper surface and the lower surface of the foaming layer, the thickness of the foaming layer is 40 to 270 micrometers, the thickness of the resin layers is 10 to 80 micrometers, spherical particles, inorganic particles and micro-bubbles are uniformly distributed in the foaming layer, and the spherical particles are positioned in the micro-bubbles. According to the micro-foaming polyester reflective film, high reflectivity, high concealment, and high film-forming stability are provided, the irradiation brightness of a liquid crystal screen can be improved, liquid crystal images are more clear and easy to see, the light reflectivity can be higher than 99%, and the light transmittance is lower than 3%.
Description
Technical field
The utility model relates to a kind of micro-expanded polyester reflectance coating.
Background technology
In recent years, liquid crystal display is as the display unit of the IT associated apparatus such as computing machine, televisor, automobile, communicator, and its application expands hastily.These displays are owing to himself not being luminophor, thereby therefore can show by the light irradiation of its backlight, backlight brightness meeting directly have influence on the brightness of liquid crystal display.
The main blooming piece of backlight has diffusion barrier, brightness enhancement film and reflectance coating, and the Main Function of reflectance coating is to expose light high-level efficiency and lossless the reflection of light guide plate bottom, thereby reduces light loss, reduces power consumption, improves the light saturation degree of LCD.
There is the problems such as reflectivity is low, light loss is large in existing reflectance coating.
Utility model content
The purpose of this utility model is to provide a kind of micro-expanded polyester reflectance coating.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is as follows:
A kind of micro-expanded polyester reflectance coating, comprises foaming layer and is compounded in the resin bed of foaming layer upper and lower surface, depth of foam is 40-270 μ m, resin layer thickness 10-80 μ m; In foaming layer, be evenly distributed with spheroidal particle, inorganic particulate and microvesicle; Spheroidal particle is positioned at microvesicle.
Applicant finds after deliberation: above-mentioned reflectance coating, when preparation, in drawing process, produce micro-cavity take spheroidal particle as core, and utilize inorganic particulate and empty interface significantly to reduce printing opacity, improved reflection of light rate and shielding.In B layer, contain a large amount of inorganic particulates simultaneously, between inorganic particulate and polyester, be formed with interface, more interface makes light reflectivity have larger raising.
The diameter of spheroidal particle is 0.3-5 μ m, is preferably 0.5-2 μ m; In foaming layer, microvesicle volume is the 10-50% of foaming layer volume, is preferably 20-35%; The particle diameter of inorganic particulate is 0.2-7 μ m, is preferably 0.4-0.8 μ m; The density of foaming layer is 0.6g/cm
3-1.2g/cm
3.
The selection of above-mentioned spheroidal particle diameter, the selection of microvesicle volume, the selection of inorganic particulate particle diameter and the control of foaming layer density, reflectivity and the disguise of transmitting film are not only improved, and in the time that preparation stretches, there will not be rupture of membranes phenomenon, throughput rate is high, has taken into account high reflectance, highly concealed type and high film forming stability.
The one side not contacting with foaming layer on resin bed is provided with the thick flexible diffusion particle layer for 5-15 μ m; The apparent density of micro-expanded polyester reflectance coating is 0.7-1.3g/cm
3, be preferably 0.9-1.2g/cm
3.
Adopt technique scheme to can further improve the reflectivity of reflectance coating.
The one side contacting with foaming layer on resin bed is evenly provided with organic or inorganic particulate layer, and the quality of organic or inorganic particulate layer is the 0.3-20% of resin bed quality.Can further improve like this reflection efficiency of reflectance coating, can guarantee film forming stability simultaneously.
Spheroidal particle is cross-linked polymer spheroidal particle.This can further improve the reflection efficiency of reflectance coating.
Cross-linked polymer spheroidal particle is the potpourri of one or more any proportionings in crosslink propylene acids, cross-linked styrene class or silicone based particle.Reflection efficiency, the disguise that can further improve like this reflectance coating guarantee high production efficiency simultaneously.
Spheroidal particle is that cross-linked polymer spheroidal particle and glass transition temperature are greater than the non-polar polymer mass particle of 110 ℃ than the potpourri for (5:10)-(8:5).Glass transition temperature is greater than the non-polar polymer particle of 110 ℃ and is preferably polyisoprene or cyclic olefine copolymer.Can further improve like this reflection efficiency and the disguise of reflectance coating.
The feed composition of described foaming layer comprises: polyethylene terephthalate 40-85 part, non-polar polymer particle 3-25 part that cross-linked polymer spheroidal particle and/or glass transition temperature are greater than 110 ℃, block copolymer resin 2-15 part of polyester and poly-dihydric alcohol, inorganic particulate 5-30 part, described umber is mass fraction; Polyethylene terephthalate viscosity is 0.65-0.85; In the block copolymer resin of polyester and poly-dihydric alcohol, the degree of polymerization of poly-dihydric alcohol is 10-100, and the content of poly-dihydric alcohol in block copolymer resin is 1-10%, is preferably 5-8%.Above-mentioned by add inorganic particulate and the preparation of cross-linked polymer spheroidal particle in polyester, produce at drawing process and polyester generation interfacial separation, this interfacial separation can produce tiny gap, the uniformity that can make the adding of the block copolymer resin of polyester and poly-dihydric alcohol space produce.
Above-mentioned inorganic particulate is the potpourri of titania, barium sulphate, zinc paste or calcium carbonate two or more any proportionings wherein.
Micro-expanded polyester reflectance coating described in the utility model resin bed adjacent with foaming layer can be light face or cloudy surface.
In polyester reflectance coating of the present utility model, its percent thermal shrinkage preferred length direction, Width 30 minutes time at 80 ℃ is all below 0.5%, more preferably 0.0-0.4%.In the time that percent thermal shrinkage exceedes 0.5%, the change in size of film increases, and the planarity of film worsens, and produces the phenomenon of brightness disproportionation.In addition, when percent thermal shrinkage is less than 0.0%, that is to say that while heating, film is what extend, packing into after backlight unit, extend because illumination thermal conductance causes film, easily produce bending, rise and fall.
The NM technology of the utility model is prior art.
A kind of micro-expanded polyester reflectance coating that the utility model provides has been taken into account high reflectance, highly concealed type and high film forming stability, can make LCD screen irradiation brightness improve, and make liquid crystal image distincter and easily see; Reflection of light rate can be greater than 99%, and the transmitance of light is less than 3%.
Accompanying drawing explanation
Fig. 1 is the micro-expanded polyester reflecting film structure of the utility model schematic diagram.
In figure, 1 is resin bed, and 2 is foaming layer, and 3 is spheroidal particle, and 4 is microvesicle, and 5 is inorganic particulate.
Embodiment
In order to understand better the utility model, further illustrate content of the present utility model below in conjunction with embodiment, but content of the present utility model is not only confined to the following examples.
Raw materials used as follows in embodiment:
A. vibrin (A)
San Fang lane limiting viscosity processed is 0.65CZ5011 (A1); Sinopec Yizheng Fiber Optical plant limiting viscosity processed is 0.75FG720 (A2).
B. crosslinked spherical particle (B)
Japan ponding chemistry acrylic acid crosslinked particle BMSA-18GN, particle diameter 0.8 μ m(B1); The Japan Zong Yan styrene crosslinked particle SX300 of chemical company, particle diameter 3 μ m(B2); Acrylic acid crosslinked particle MX500, particle diameter 5 μ m(B3).
C. non-polar resin (C)
The polymethylpentene DX820 processed of Mitsui Chemicals, Inc (Cl).
D. copolymer resins (D)
Sinopec Yizheng Fiber Optical plant limiting viscosity processed is 0.80BG80A (D1); Korea S LG chemistry ester TPEE1065D (D2).
E. inorganic particulate (E)
Mean grain size is the barium sulphate particle (E1) of O.7 μ m; Mean grain size is the calcium carbonate particle (E2) of 1.O μ m; Mean grain size is the TiO 2 particles (E3) of 0.3 μ m; Mean grain size is the silicon dioxide granule (E4) of 3.5 μ m.
F. photostabilizer (F)
Photostabilizer UV234 (F1).
Embodiment 1
Micro-expanded polyester reflectance coating as shown in Figure 1, comprises foaming layer and is compounded in the resin bed of foaming layer upper and lower surface, depth of foam is 143 μ m, two layers of resin layer gross thickness 45 μ m; In foaming layer, be evenly distributed with spheroidal particle, inorganic particulate and microvesicle; Spheroidal particle is positioned at microvesicle.The diameter of spheroidal particle is 0.8 μ m; The particle diameter of inorganic particulate is 0.7 μ m; In foaming layer, microvesicle volume is 30% of foaming layer volume; The density of foaming layer is 0.9g/cm
3.
By in advance at the temperature of 160 ℃ vacuum drying the vibrin (A1) of 5 hours, crosslinked spherical particle (B1), copolymer resins (D11) and inorganic particulate (E1) mix with weight rate 67:8:10:15 supplies with main stor(e)y extruder (B layer, foaming layer), simultaneously by advance at the temperature of 160 ℃ vacuum drying the vibrin (A1) of 5 hours and inorganic particulate (E1) ratio that is scaled 92:8 with weight supply with auxiliary layer extruder (A layer, resin bed), at the temperature of 280 ℃, melt extrude respectively, extruding front use cut-off footpath is that 20 μ m filtrators carry out foreign body filtering, then be directed in compound mouthful of mould of T-shaped die head, make its interflow and spue 3-tier architecture A/B/A structure, coextrusion is sheet, and by static charge method, this melting laminated sheet note is attached on the chill roll that surface temperature remains on 28 ℃, make its cooling curing, then, stretch 3.3 times with Width is each along its length.Then carry out again thermal finalization processing, at 220 ℃ of temperature, implement the thermal treatment in 10 seconds, and further at 170 ℃ of temperature broad ways carry out 3% relaxation processes; Follow cooling after, obtain micro-foaming white polyester film.In addition, the thickness of micro-foaming white polyester film of gained is 188 μ m, and in foaming layer, microvesicle volume is 30% of foaming layer volume; The density of foaming layer is 0.9g/cm
3; The apparent density of micro-expanded polyester reflectance coating is 1.0g/cm
3, specific performance parameter is in table 1.
Embodiment 2-5
Preparation technology is all with reference to embodiment 1, and the performance of material proportion and products obtained therefrom is in table 1, and wherein, in foaming layer, microvesicle volume is 20% of foaming layer volume; The density of foaming layer is 0.7g/cm
3; The apparent density of micro-expanded polyester reflectance coating is 0.9g/cm
3.
Embodiment 6
A kind of micro-expanded polyester reflectance coating, comprises foaming layer and is compounded in the resin bed of foaming layer upper and lower surface, depth of foam is 100 μ m, two layers of resin layer gross thickness 45 μ m; In foaming layer, be evenly distributed with spheroidal particle, inorganic particulate and microvesicle; Spheroidal particle is positioned at microvesicle.The diameter of spheroidal particle is 1.2 μ m; The particle diameter of inorganic particulate is 3 μ m; In foaming layer, microvesicle volume is 30% of foaming layer volume; The density of foaming layer is 0.9g/cm
3.It is the flexible diffusion particle layer of 8 μ m that the one side not contacting with foaming layer on resin bed is provided with thick; The apparent density of micro-expanded polyester reflectance coating is 1.2g/cm
3; The one side contacting with foaming layer on resin bed is evenly provided with layer with inorganic particles, and the quality of layer with inorganic particles is 2% of resin bed quality.
Comparative example 1-3
Preparation technology is all with reference to embodiment 1, and the performance of material proportion and products obtained therefrom is in table 1, and wherein, in foaming layer, microvesicle volume is 40% of foaming layer volume; The density of foaming layer is 1.2g/cm
3; The apparent density of micro-expanded polyester reflectance coating is 1.2g/cm
3.
Table 1
In above-mentioned table, ◎ is outstanding, and zero is good, and △ is general, × poor; B layer accounts for 80%, A layer and accounts for 20% finger: in the micro-foaming white polyester film of gained, the mass content of B layer is 80% of micro-foaming white polyester film quality, and the mass content of A layer is 20% of micro-foaming white polyester film quality.
Light reflectivity (%) adopts the Japanese Minolta CM-5 of company spectrophotometer to detect; The test of light transmission rate is with reference to GB/T2410-2008; The method of testing of film forming stability: when preparation, continuous 8 hours not rupture of membranes be that film forming is outstanding, continuous 8 hours ruptures of membranes are for 1-2 time that film forming is good, it is general that continuous 8 hours ruptures of membranes exceed 3-5 above film forming, exceed 5 times be that film forming is poor.
Claims (7)
1. a micro-expanded polyester reflectance coating, is characterized in that: comprise foaming layer and be compounded in the resin bed of foaming layer upper and lower surface, depth of foam is 40-270 μ m, resin layer thickness 10-80 μ m; In foaming layer, be evenly distributed with spheroidal particle, inorganic particulate and microvesicle; Spheroidal particle is positioned at microvesicle.
2. micro-expanded polyester reflectance coating as claimed in claim 1, is characterized in that: the diameter of spheroidal particle is 0.3-5 μ m; The particle diameter of inorganic particulate is 0.2-7 μ m.
3. micro-expanded polyester reflectance coating as claimed in claim 2, is characterized in that: the diameter of spheroidal particle is 0.5-2 μ m; The particle diameter of inorganic particulate is 0.4-0.8 μ m.
4. micro-expanded polyester reflectance coating as claimed in claim 1, is characterized in that: in foaming layer, microvesicle volume is the 10-50% of foaming layer volume; The density of foaming layer is 0.6g/cm
3-1.2g/cm
3.
5. micro-expanded polyester reflectance coating as claimed in claim 2, is characterized in that: in foaming layer, microvesicle volume is the 20-35% of foaming layer volume.
6. the micro-expanded polyester reflectance coating as described in claim 1-5 any one, is characterized in that: the one side not contacting with foaming layer on resin bed is provided with the thick flexible diffusion particle layer for 5-15 μ m; The apparent density of micro-expanded polyester reflectance coating is 0.7-1.3g/cm
3.
7. the micro-expanded polyester reflectance coating as described in claim 1-5 any one, is characterized in that: the one side contacting with foaming layer on resin bed is evenly provided with organic or inorganic particulate layer, the quality of organic or inorganic particulate layer is the 0.3-20% of resin bed quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320841960.1U CN203658609U (en) | 2013-12-19 | 2013-12-19 | Micro-foaming polyester reflective film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320841960.1U CN203658609U (en) | 2013-12-19 | 2013-12-19 | Micro-foaming polyester reflective film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203658609U true CN203658609U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320841960.1U Expired - Fee Related CN203658609U (en) | 2013-12-19 | 2013-12-19 | Micro-foaming polyester reflective film |
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|---|---|
| CN (1) | CN203658609U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675965A (en) * | 2013-12-19 | 2014-03-26 | 南京兰埔成新材料有限公司 | Micro-foaming polyester reflecting film |
| CN108431646A (en) * | 2015-12-25 | 2018-08-21 | 白石工业株式会社 | Light reflector |
-
2013
- 2013-12-19 CN CN201320841960.1U patent/CN203658609U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675965A (en) * | 2013-12-19 | 2014-03-26 | 南京兰埔成新材料有限公司 | Micro-foaming polyester reflecting film |
| CN108431646A (en) * | 2015-12-25 | 2018-08-21 | 白石工业株式会社 | Light reflector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Jin Huailong Inventor after: Shen Anle Inventor before: Jin Huailong Inventor before: Shen Anle Inventor before: Xu Chengcheng |
|
| CB03 | Change of inventor or designer information | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20201219 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |