CN107615109A - White reflection film - Google Patents
White reflection film Download PDFInfo
- Publication number
- CN107615109A CN107615109A CN201680032741.5A CN201680032741A CN107615109A CN 107615109 A CN107615109 A CN 107615109A CN 201680032741 A CN201680032741 A CN 201680032741A CN 107615109 A CN107615109 A CN 107615109A
- Authority
- CN
- China
- Prior art keywords
- top layer
- reflection film
- white reflection
- film
- type backlight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K2/00—Non-electric light sources using luminescence; Light sources using electrochemiluminescence
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
- Laminated Bodies (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The problem of the present invention is inexpensively to provide economy, Film making properties, white, reflectivity, light weight, surface configuration excellent white reflection film, and makes briliancy characteristic and the backlight excellent in compatibility with other components by using the white reflection film.The solution method of the present invention is that the side for meeting following (i)~(iii) enters type backlight white reflection film.(i) it is to comprise at least top layer (A) and more than 2 layers of the stack membrane containing alveolate substrate layer (B).(ii) the median plane mean roughness (SRa) on the surface of top layer (A) is 90nm less than 300nm.(iii) top layer (A) has the region that the polymer different by the polymer from forming matrix is formed.
Description
Technical field
The present invention relates to the white reflection film for the luminance nonuniformity for seeking to improve liquid crystal backlight.More specifically, it is related to
It is adapted in illumination area source such as the back light for liquid crystal display device of sidelight (edge light) formula and signboard, automatic vending machine etc.
The middle white reflection film used.
Background technology
The backlight of irradiating liquid crystal unit is used in a liquid crystal display, is divided into straight-down negative and side-light type.In straight-down negative,
Many cold-cathode tube, light emitting diodes (LED) as light source are configured at immediately below screen, are mainly requiring the TV of high briliancy
Used in purposes, on the other hand, in side-light type, due to light source to be configured to the end of screen, using light guide plate, so as to be made
Area source, therefore slimming can be realized, requiring tablet personal computer, notebook computer, desktop computer display, the TV of slimming
Used in purposes.As these backlight reflectance coatings, white films (the patent text of the general Porous using by bubble formation
Offer 1).For the reflectance coating used in side light type, it is desirable to which high reflectivity can be self-evident, special requirement and light guide plate
Compatibility.So far, for being contacted due to light guide plate with white films and caused white point is uneven (sends out point-like can be observed
Bright part), cause due to vibration and to printing on light guide plate to damage, produce the problem of luminance nonuniformity, pass through coating
The spherical particle of suitable stiffness, the rigidity for improveing base material white films, reflection characteristic etc., so as to seek to improve the briliancy on picture not
Uniformly (patent document 2,3).
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 8-262208 publications
Patent document 2：Japanese Unexamined Patent Publication 2003-92018 publications
Patent document 3：No. 5578177 publications of Japanese Patent
The content of the invention
Invent problem to be solved
However, the requirement to tablet personal computer, the long durability of notebook computer, Impacting endurance in recent years becomes strong,
Seek the reflectance coating for being resistant to be referred to as the endurancing that heavy duty gets experiment ready.Pass through the local impact test, reflection
Film concave-convex surface contacts strongly with light guide plate, therefore light guide plate surface produces damage, as a result occurs producing asking for luminance nonuniformity
Topic.
Recorded in the prior art in patent document 2,3, it is uneven (shinny point-like can be observed that white point can be suppressed
Part), by the damage generation to printing layer on light guide plate caused by vibrating, but it can not fully meet what is be required in recent years
Impacting endurance in tablet personal computer, notebook computer.
Therefore, problem of the invention is, inexpensively provides with the impact resistance being not carried out in above-mentioned conventional research
The film of durability, excellent reflectivity and surface configuration.
For solving the method for problem
The present invention is in order to solve above-mentioned problem, using the method for any one of following (1)~(9).
(1) a kind of side enters type backlight white reflection film, meets following (i)~(iii).
(i) it is to comprise at least top layer (A) and more than 2 layers of the stack membrane containing alveolate substrate layer (B).
(ii) the median plane mean roughness SRa on the surface of top layer (A) is 90nm less than 300nm.
(iii) top layer (A) has following regions (domain), and the region is different by the polymer from forming matrix to gather
Compound is formed.
(2) side according to (1) enters type backlight white reflection film, and the interfacial thickness in the region is more than 20nm
And below 1,000nm.
(3) side according to (1) or (2) enters type backlight white reflection film, it is characterised in that on observation top layer
(A) during section, the shape in the region described in (1) or (2) is the length of thickness direction:The ratio of the length of length direction is 1:
3~50.
(4) side according to any one of (1)~(3) enters type backlight white reflection film, and top layer (A) contains grain
Son, its particle content are less than 5 mass %.
(5) type backlight white reflection film is entered according to the side any one of (1)~(4), 20 ° of top layer (A)
The difference of glossiness and 85 ° of glossiness is more than 50%.
(6) side according to any one of (1)~(5) enters type backlight white reflection film, at least contains in top layer (A)
There are polyester or polyolefin with alicyclic structure.
(7) type backlight white reflection film is entered according to the side any one of (1)~(6), top layer (A) by 2 kinds with
Upper polymer is made, and the decrease temperature crystalline temperature Tmc of the top layer (A) difference is for 10 DEG C less than 40 DEG C.
(8) a kind of back light for liquid crystal display device, it is made using the film any one of (1)~(7).
(9) back light for liquid crystal display device according to (8), light source is light emitting diode.
Invention effect
According to the present invention, side (reflection surface side during use, towards leaded light is not contacted with light guide plate in white reflection film
The side of plate) top layer (A) in addition particle, but by selecting the polymer of special construction, surface roughness control is existed
In particular range, so as to provide the white reflective that can suppress the damage to light guide plate in the impact test of backlight
Film.In the backlight and illumination area source of the side-light type for being used to the white reflection film obtained by the present invention possess LED light source
When, so as to preferably reduce luminance nonuniformity than ever, therefore it is preferable by suppressing the damage to light guide plate.
Embodiment
The present invention suppresses the white of the damage to light guide plate for above-mentioned problem, i.e. in the impact test in side light type backlight source
Color reflectance coating has made intensive studies, and as a result finds out：Side (reflection during use is not contacted with light guide plate in white reflection film
Surface side, the side towards light guide plate) top layer (A) in addition particle, but select special construction polymer, make rough surface
In the case that degree is in specific scope, above-mentioned problem can be solved in the lump.
It should be noted that so-called luminance nonuniformity, refers to the following notes observed by visual observation when lighting backlight
What is carried is uneven.
(i) striated is uneven
(ii) puddles of water shape is uneven
(iii) it is visible uneven as dark space
In addition, so-called white point is uneven, the major diameter for referring to observe by visual observation when lighting backlight is less than the ellipse of 5cm
Circular point-like it is uneven.
Illustrate its detailed content below for white reflection film of the present invention.
[basic structure of white reflection film]
The white reflection film of the present invention includes top layer (A) and containing alveolate substrate layer (B), if it is considered that film is easy
Degree and effect, then more than 2 layers of structure is necessary preferred 3-tier architecture.Substrate layer (B) is particularly preferably protected by top layer (A)
Form, i.e. top layer (A)/substrate layer (B)/3-tier architecture as top layer (A).In addition, further turning into the situation of multilayer
Under, preferably core layer section is that the skin section of substrate layer (B), one side or both sides is top layer (A).
[(B) containing alveolate substrate layer]
For the white reflection film of the present invention, for white, the purpose of reflection characteristic, have inside substrate layer (B)
It is necessary to have bubble, by making it contain the composition incompatible with the polyester or polypropylene that substrate layer (B) is made and carrying out double
Axle stretches, and can form bubble.
As their manufacturer's rule, disclose the record of the publication of Japanese Patent 3734172 using barium sulfate as not phase
The example of the polyester of the composition of appearance, Japanese Unexamined Patent Publication 2012-158167 publications record using titanium oxide as incompatible composition
Polypropylene, the concrete example in the incompatible resin of organic system as organic matter, polyethylene, polypropylene, polybutene, poly- can be enumerated
The polyolefin of straight-chain, branched or ring-type as methylpentene, cyclopentadiene etc..The polyolefin can be homopolymer,
Can be copolymer, and then two or more kinds may be used.Wherein, from the viewpoint of transparent excellent and excellent heat resistance is such,
As crystalline polyolefin, preferably using polypropylene, polymethylpentene etc., as amorphous polyolefins, preferably using cycloolefin
Copolymer etc..
In the present invention, the addition on incompatible composition, set by the gross mass for containing alveolate substrate layer (B)
For 100 mass % when, it is preferably 5~50 mass %, more preferably 5~30 mass %.If the content of incompatible composition
Less than 5 mass %, then can not fully it be generated in film air entrapment sometimes, white, reflective character are poor.On the other hand, if
The content of incompatible composition is more than 50 mass %, then fracture when not only film strength declines, easily stretched, Er Qie
During post-processing, occur producing the bad phenomenons such as powder sometimes.By making content within the above range, its performance can be made sufficient
White, reflectivity, light weight.
[surface roughness of top layer (A)]
In the white reflection film of the present invention, the median plane mean roughness (SRa) on top layer (A) surface need for 90nm with
Go up and be less than 300nm, preferably 120~300nm, most preferably 120~250nm.In the case where it is less than 90nm, glossiness
Uprise, being attached to the dust on surface becomes easily to observe, in addition, luminance nonuniformity in side light type backlight source, especially white point
Easily occur.On the other hand, in the case where it is more than 300nm, top layer easily occurs in the vibration test with light guide plate
(A) surface by scraping, be transferred to the problem of light guide plate point.
The median plane mean roughness on the surface on top layer (A) is the value determined by following method.
According to JIS B0601 (2001), made contact pin type surface roughness meter (model is studied using small slope：ET
4000A) determine median plane mean roughness (SRa).Condition is as described below, using the average value of 5 measure as said determination value.
Stylus tip radius：0.1μm
Contact pilotage loads：100μN
Measured length：1.0mm
Cutoff：0.25mm
[top layer (A) has the region that the polymer different by the polymer from forming matrix is formed]
Top layer (A) is necessary the region formed with the polymer different by the polymer from forming matrix, so as not to send out
The raw luminance nonuniformity after luminance nonuniformity, impact test caused by being contacted with light guide plate.Region can be from top layer (A)
Readily recognized in section SEM contrast.
In the case of without the region being made up of polymer, for example, in the application is realized by inorganic particulate
In the case of heart face mean roughness (SRa), light guide plate is caused to damage in impact test, produce luminance nonuniformity.In addition,
In the case where realizing median plane mean roughness (SRa) by organic filler, organic filler comes off, adhered in impact test
In light guide plate, luminance nonuniformity is produced.
The interfacial thickness in the region in the present invention is preferably more than 20nm and below 1,000nm.In the situation less than 20nm
Under, become easily to produce hole between matrix and region, may be rolled in impact test mesostroma and be attached to light guide plate, produce
Raw luminance nonuniformity.In addition, if greater than 1,000nm, then excessively compatibilized, can not obtain sufficient surface roughness sometimes.
The preferred scope of area thickness is more than 50nm and 1, below 000nm, more preferably more than 50nm and below 500nm.
In order to realize the scope of above-mentioned zone thickness, ester exchange reaction can be controlled by using ester exchange reaction inhibitor
Method, using compatibility agent control the method for compatibility to be controlled.
Region in the present invention is preferably shaped to the co-stretched summary flat formed together with matrix, specifically,
When observing the section of top layer (A), the length of thickness direction:The length ratio of length direction is preferably 1:3~50.Less than 1:3
(1:3 do not indicate that ratio, but lower limit) in the case of, region is not co-stretched, becomes easily to produce hole, may impact
Experiment mesostroma is rolled and is attached to light guide plate, produces luminance nonuniformity.In addition, if greater than 1:50(1:50 do not indicate that ratio yet
Value, but the upper limit), then may it is co-stretched excessively together with matrix, do not form bumps.The preferred scope of region shape is
1:5~50, more preferably 1:10~50.
In order to realize the shape of above-mentioned zone, the poor sides of the Tg for the polymer that control respectively constitutes matrix and region can be enumerated
Method.Specifically, the Tg difference controls that will preferably respectively constitute the polymer of matrix and region are 10 DEG C less than 40 DEG C.
By the region formed with the polymer different by the polymer from forming matrix, the surface roughness formed
Shape is not but the gentle projection by the high projection of the urgency of the formation such as particle, therefore to the aggressive low of light guide plate, can
Significantly suppress the luminance nonuniformity after luminance nonuniformity, impact test.
As top layer (A) thickness, preferably more than 4 μm and less than 12 μm.If less than 4 μm, then when being film-made sometimes
Rupture is more, operability declines, or do not form sufficient concave-convex surface.If in addition, than 12 μ m-thicks, may cause under briliancy
Drop.More preferably more than 6 μm and less than 12 μm.
[decrease temperature crystalline temperature (Tmc)]
The preferred main projection in top layer (A) in the present invention is formed by core of polymer, so as not to produce impact test
Luminance nonuniformity afterwards.In order to form the projection using polymer as core, preferably it is made up of two or more polymer, and is them
The incompatibly state of forming layer (A) in extruder, film-forming process.
On being judged as incompatible benchmark, can enumerate for example, observe top layer (A) decrease temperature crystalline temperature (Tmc) it
Difference.Specifically, preferably decrease temperature crystalline temperature (Tmc) is more than 10 DEG C and less than 40 DEG C.If it exceeds 40 DEG C, then it may promote
Enter cold crystallization, form firm concave-convex surface, the problem of scraping light guide plate occurs.More preferably 15 DEG C less than 35
℃。
As compatible method is suppressed, in the case of polyesters, the work that addition suppresses polymer polymerizing catalyst can be enumerated
The method of the so-called ester exchange inhibitor of property or suppress method of hot resume etc. in film-forming process.
[polyester or polyolefin with alicyclic structure]
In polymer of more than two kinds in the present invention, preferably at least a kind contains polyester or polyene with alicyclic structure
Hydrocarbon.Wherein, if using the different polyester or polyolefin with alicyclic structure of compatibility, it is recessed easily to form suitable surface
It is convex.As such alicyclic structure, preferably cyclopropane ring, cyclobutane ring, pentamethylene ring, cyclohexane ring.By make offer acid into
Point dimethyl terephthalate (DMT), the 1,3- rings propane diols as diol component, 1,3- cyclobutanediols, 1,3- rings pentanediol, 1,
4- cyclohexanedimethanols carry out polycondensation reaction in the presence of 200ppm three (2 ethyl hexanoic acid) butyl tins, can obtain with fat
The polyester granulate or polyolefin particles of ring structure.
As the polyester with cyclobutane ring, can be adapted to use " TRITAN " (registration mark) (Eastman
Chemical Company societies system), as the polyester with cyclohexane ring, can be adapted to use EASTAR " (registration mark)
(Eastman Chemical Company societies system), as the polyolefin with pentamethylene ring, it can be adapted to use " ゼ オ ノ
ア " (registration mark) (Japanese ゼ オ Application (strain) system) etc..
As the addition of the polyester (B) with alicyclic structure, it is not particularly limited, but relative to total matter of top layer (A)
100 mass % are measured, preferably more than 10 mass % and below 40 mass %, particularly preferably more than 15 mass % and 35 mass %
Below.If less than 10 mass %, then the luminance nonuniformity in side light type backlight source, especially white point are easily produced.
In polymer of more than two kinds in the present invention, as the polymerization beyond polyester or polyolefin with alicyclic structure
Thing, it can use and gather obtained by the dicarboxylic acid components such as glycol and terephthalic acid (TPA), M-phthalic acid such as ethylene glycol, butanediol copolymerization
Ester.Wherein, it is preferably used as the polyethylene terephthalate (PET) of the polymer of ethylene glycol and terephthalic acid (TPA).Remove
Beyond above-mentioned PET, for the imparting of film stability, the purpose of concave-convex surface is more readily formed, can also use ethylene glycol
With M-phthalic acid and the copolymerization PET (PET-I) of terephthalic acid (TPA).As PET-I addition, top layer (A) is being set to 100
In the case of weight %, preferably 20 weight % are less than 50 weight %.If less than 20 weight %, then film is steady sometimes
Qualitatively effect is low, or the effect that concave-convex surface is formed is low.In addition, if more than 50 weight %, then sometimes under heat resistance
Drop.
[particle content]
The particle less than 5 mass % can be contained in the range of the effect of the present invention is not damaged.If contain 5 mass %
More than particle, then damage light guide plate sometimes, either polymer is peeling-off or particle itself comes off as starting point using particle
And pollute light guide plate.The scope of preferred particle content is below 4 mass %, more preferably below 3 mass %.
The particle of the present invention refers to inorganic particulate or organic filler.As inorganic particulate, titanium dioxide, carbonic acid can be enumerated
Calcium, barium sulfate, silica etc..As organic filler, acrylic compounds, polystyrene, nylon etc. can be enumerated.
[low in glossiness]
20 ° of top layer (A) in the present invention are preferably more than 50% with 85 ° of low in glossiness.Because the difference of glossiness is big,
Therefore light can be expeditiously made to be back in front of display as optical reflection film.More preferably more than 65%, further preferably
For more than 80%.
[film-forming method]
On the manufacture method of the biaxially-stretched film of the present invention, one example is illustrated, but the present invention is not limited to
The example.
On top layer (A), by comprising polyester or polypropylene, there is the polyester (B) of alicyclic structure and be added as needed on
The mixtures of various additives be fully dried in vacuo, supply to warmed-up extruder.On with alicyclic ring knot
The addition of the polyester (B) of structure, the masterbatch for carrying out equably melting mixing in advance and making can be used, or can directly fed
To mixing extruder.
On containing alveolate substrate layer (B), by comprising polyester or polypropylene with incompatible composition and as needed
The mixture of the dispersant of addition is fully dried in vacuo, and is supplied to warmed-up extruder.On it is incompatible into
Point addition, can use and carry out equably melting mixing in advance and the masterbatch that makes, or can be directly fed to be kneaded and squeeze
Go out machine.
In addition, in melting extrusion, filtered, be then introduced into preferably by the filter that mesh size is less than 40 μm
To T-shaped mould tool mouth mold, molten sheet is obtained by extrusion molding.
The molten sheet is cooled in surface temperature on 10~60 DEG C of drum and carry out closely sealed cooling and solidifying using electrostatic, make
This 3 tunic of non-stretched A/B/A.Non-stretched 3 tunic importing is heated to 70~120 DEG C, preferably 70~100 DEG C of roller group,
(longitudinal direction, the i.e. travel direction of film) cools down according to 2.5~4 times of stretchings in the roller group that temperature is 20~50 DEG C along its length.
Then, while clamping the both ends of film with clip while stenter is imported, in the gas for the temperature for being heated to 90~150 DEG C
In atmosphere, 2.5~4 times are stretched to along the direction (width) vertical with length direction.
On stretching ratio, it is respectively 2.5~4 times to make length direction and width, but its area multiplying power (longitudinal stretching
Multiplying power × cross directional stretch multiplying power) for 9~16 times be it is necessary, more preferably 10~12 times.If area multiplying power is less than 9 times,
The bubble of the white reflection film of gained, concavo-convex formation and film-strength become insufficient, if area multiplying power more than 16 times,
Rupture is easily produced when then stretching.
In order that the crystalline orientation of the biaxially-stretched film of gained is completed, dimensional stability is assigned, and then in stenter
The heat treatment of 1~30 second is carried out at a temperature of 150~240 DEG C, equably slowly lets cool, is subsequently cooled to room temperature, Ran Hougen
Corona discharge Treatment etc. is carried out according to needs, in order to further improve the adaptation with other materials, is batched, so as to
Obtain the white reflection film of the present invention.In above-mentioned heat treatment step, preferably in the width direction or length direction implement 3~12%
Relaxation processing.
[side light type backlight source]
The white reflection film of the present invention is preferred for side light type backlight source.On side light type backlight source, such as with recessed
The white reflection film of the present invention is installed successively in convex framework, light guide plate forms, white films are with the one side of top layer (A) to leaded light
The mode of plate is installed.In addition, the light sources such as LED are set in the marginal portion of light guide plate.Furthermore, it is possible to before light guide plate (with
The opposite side of white reflection film) diffuser plate, prism etc. are set.
[purposes of white reflection film]
The white reflection film of the present invention can be used for backlight, wherein it is possible to be suitably used for the liquid crystal display of side-light type
With the illumination area source such as backlight and signboard, automatic vending machine.
Furthermore it is also possible to suitably serve as the reflecting plate for forming various area sources, the solar cell for requiring reflection characteristic
Diaphragm seal, the backboard of component.Furthermore it is also possible to it is card, label as paper sub, seals, express waybill, image printer
With developing-out paper, ink-jet printer, bar-code printer developing-out paper, poster, map, dust-free paper, display board, blank, thermal transfer,
It is the building materials such as the base material of the receiver sheet used in the various hard copies such as offset printing, phonecard, IC-card, wallpaper, outer indoors
The ligthing paraphernalia that uses, indirect lighting utensil, the component being equipped in automobile, railway, aircraft etc., circuit material with etc. electronics
Part uses.
[measure of physical property and the evaluation method of effect]
Assay method
The evaluation method of the physics value of the present invention and the evaluation method of effect are as follows.
A. surface roughness
According to JIS B0601 (2001), made contact pin type surface roughness meter (model is studied using small slope：ET
4000A) determine median plane mean roughness (SRa).Condition is as described below, using the average value of 5 measure as surface roughness
Value.
Stylus tip radius：0.1μm
Contact pilotage loads：100μN
Measured length：1.0mm
Cutoff：0.25mm
B. region
The section of white reflective membrane sample is cut out, uses Flied emission scanning electron microscope " JSM-6700F " (Japan's electricity
Sub (strain) system), 2,000~10,000 times of top layer (A) amplification is observed and shoots cross-section photograph, from the photo observation area
Domain.By the situation without clear and definite interface, the deep or light part for having the co-stretched summary flat formed be judged as have by with structure
The region that the polymer different into the polymer of matrix is formed.On the other hand, the situation for surrounding being formed to hole is judged as particle.
Then, in the case of the region being made up of polymer, top layer (A) ultra-thin section is made, uses OsO4Dyeing, so
The shape in transmission electron microscope tem observation region and the interfacial thickness in region are utilized afterwards.
On the shape in region, the length of point to point range determination thickness direction is utilized:The length of length direction, obtain ratio
Rate.The interface (width of deep or light part) in point to point range determination region is similarly utilized, as interfacial thickness.The shape in region
The average value for determining 5 positions is used with the interfacial thickness in region.
C. particle content
Will by the use of the small pieces that taperer (taper) scraping white reflection film surface is cut out as sample, according to
JISK7250-1:The ash amount of 2006 measure gained.Same operation and measure are carried out using other 5 white reflection films, will
The average value of 5 is as particle content.
D. decrease temperature crystalline temperature (Tmc)
The small pieces that taperer (taper) scraping white reflection film surface will be utilized to be cut out weigh 5mg into sample disc, root
According to JIS K7122 (1987), the means of differential scanning calorimetry made using セ イ コ ー electronics industries (strain) determines device " ロ ホ ゛ ッ ト
DSC-RDC220 ", data parsing use デ ィ ス Network セ ッ シ ョ Application " SSC/5200 ", according to following main points, implement measure.Separately
Outside, the temperature being listed below uses average value obtained by 5 membrane samples of measure.
300 DEG C are heated to from 25 DEG C with 20 DEG C/min of programming rate, keeps 5 minutes, then, quenching in this condition
To less than 25 DEG C.And then 300 DEG C are warming up to from room temperature with 20 DEG C/min of programming rate again, keep 5 points in this condition
Clock, then, 25 DEG C are cooled to from 300 DEG C with 20 DEG C/min of speed, quenching process is removed, enters during each heating, cooling
The measure of row endothermic/exothermic peak.
By above-mentioned drop is being used as using 20 DEG C/min of speed from 300 DEG C of exothermic peak temperatures being cooled to during 25 DEG C
Warm crystallized temperature (Tmc).
In decrease temperature crystalline temperature, the exothermic peak temperature of higher temperature is set to Tmc1, by relatively low exothermic peak temperature
Tmc2 is set to, the difference of decrease temperature crystalline temperature (Tmc) is set by following formula.
Difference=Tmc1-Tmc2 of decrease temperature crystalline temperature (Tmc)
E. with the compatibility of light guide plate
(i) light guide plate pollutes
By 40 inch liquid crystal TV (ソ ニ ー societies systems, KDL-40EX700) decompose, take out the sidelight using LED as light source
The backlight of type.The size of light-emitting area is 89cm × 50cm, and diagonal length is 102.2cm.Taken out from the backlight guide-lighting
Plate, the light guide plate is cut into 5cm square, makes the jog of light guide plate overlapping with the top layer (A) of the white reflection film of the present invention,
500g counterweight is placed on the opposite side of top layer (A), is made in a manner of the top layer (A) of the white reflection film of the friction present invention
It carries out 3cm × 5 time and moved back and forth.Then, the light guide plate, anti-with the white of the present invention of micro- sem observation 5cm square is utilized
Top layer (A) face of film surface contact is penetrated, forms evaluation result as described below.
A：Excellent (not observing attachment)
B：Well (attachment can be observed if examining)
F：Poor (attachment can be observed)
Above-mentioned A and B are set to qualified.
(ii) heavy duty gets experiment ready
The light guide plate taken out from above-mentioned backlight is cut into 5cm square, makes the jog of light guide plate with the present invention's
The top layer (A) of white reflection film is overlapping, using diameter 1mm SUS columned rod, with 200g heavy burden at top layer (A)
Opposite side on carry out getting experiment ready 1000 times.Then, contacted by the top layer (A) of micro- sem observation white reflection film
The face of light guide plate, form evaluation result as described below.
A：Excellent (not observing damage)
B：Well (it can be observed to damage if examining)
F：Poor (can be observed to damage)
Above-mentioned A and B are set to qualified.
(iii) luminance nonuniformity
The type liquid crystal TV LHD32K15JP backlights of Ha イ セ Application ス ジ ャ パ Application Co. Ltd. system 32 of new product will be pasted on
Interior reflectance coating replaces with the white reflection film of the present invention, lighting.Standby 1 hour in this condition, make light stability, then
Observation can be considered as the situation of luminance nonuniformity by visual observation under 500Lx lighting environment or under dark surrounds, be formed
Evaluation result as described below.It should be noted that luminance nonuniformity mentioned here is to be contacted to draw with light guide plate by reflectance coating
The situation caused by bright spot risen.
A：It is excellent (not observe under 500Lx lighting environment and luminance nonuniformity under dark surrounds.)
B：Well (luminance nonuniformity can be observed under 500Lx dark surrounds, but do not observe brightness under lighting environment
Spend uneven.)
F：Difference (is able to observe that under 500Lx lighting environment and luminance nonuniformity under dark surrounds.)
Above-mentioned A and B are set to qualified.
F. Film making properties
When being filmed in embodiment, comparative example, film rupture is only occurred less than 1 times/day, and do not taken off by particle
The situation that process caused by falling etc. pollutes is set to A；Film rupture is only occurred less than 1 times/day, but by being visually able to confirm that
Situation about polluting in the accumulation of roller surface is set to B；Film rupture to that more than 2 times/day and less than 3 times/day of situation occur and is set to F；
More than B Film making properties are needed in a large amount of productions, if more than A, then further there is cost reducing effect.
G. glossiness
Using digital angle Grossmeters UGV-5B (ス ガ testing machines (strain) system), according to JIS Z-8741 (1997) from white
Top layer (A) side measure of color reflectance coating.It should be noted that on condition determination, 60 ° of glossiness are to make condition determination for incidence
Value when angle=60 °, acceptance angle=60 °, similarly 20 ° of glossiness are values when making incidence angle=20 °, acceptance angle=20 °,
85 ° of glossiness are values when making incidence angle=85 °, acceptance angle=85 °.
Embodiment
Wait by the following examples and further specifically describe the present invention, but the present invention is not limited by it.
(raw material)
Top layer (A)
Using terephthalic acid (TPA) as sour composition, using ethylene glycol as diol component, with relative to the polyester of gained
Grain adds antimony trioxide (polymerization catalyst) in a manner of antimony atoms conversion is calculated as 300ppm, carries out polycondensation reaction, acquired character
The polyethylene terephthalate particle (PET) that viscosity is 0.63dl/g, carboxyl terminal base unit weight is 40 equivalents/ton.
M-phthalic acid is added by same method, it is common to obtain poly- (terephthalic acid/isophthalic acid) glycol ester
Polymers (PET-I).
Butanediol is added by same method, obtains polybutylene terephthalate (PBT) (PBT).
Polyester with alicyclic structure
The dimethyl terephthalate (DMT) of offer acid composition is provided, existed as the CHDM (cyclohexanedimethanol) of diol component
Polycondensation reaction is carried out in the presence of 200ppm three (2 ethyl hexanoic acid) butyl tins, obtains copolyester.
In addition, the commodity of listing are used (for example, as alicyclic structure a, to use " TRITAN " (Eastman Chemical
Company societies system), as alicyclic structure b, use " EASTAR " (registration mark) (Eastman Chemical Company societies
System)), as alicyclic structure c, use " セ ゛ オ ノ ア " (registration mark) (Japanese ゼ オ Application (strain) is made)).
They are characterised by forming the copolymer composition of diol component, for example, EASTAR has cyclohexane ring, TRITAN tools
There is cyclobutane ring composition.
(embodiment 1~8)
By (PBT/PTMG) copolymer 5 of PET57 mass parts, polybutylene terephthalate (PBT) and polytetramethylene glycol
Mass parts (trade name：East レ デ ュ ポン societies Ha イ ト レ Le), make relative to ethylene glycol be 33mol% 1,4- hexamethylenes
Polyethylene terephthalate (33mol%CHDM is copolymerized PET) 8 mass parts, poly- (5- first are copolymerized obtained by dimethanol copolymerization
Base) 20 mass parts of ENB, the adjustment mixing of the parts by weight of Titanium Dioxide Rutile Top grade 10, dry 3 hours at 180 DEG C, then supply
To the extruder B (B layers) for being heated to 270~300 DEG C.
On the other hand, as layer (A), ratio according to table 1 is by PET, PET-I, alicyclic structure a " TRITAN "
(Eastman Chemical Company societies system), ester ring type structure b " EASTAR " (registration mark) (Eastman Chemical
Company societies system), 0.6 μm of silica of particle diameter used in particle a, particle diameter 3.5 μm of silica, grains used in particle b
The barium sulfate mixing of 0.6 μm of particle diameter used in sub- c, is dried in vacuo 3 hours at 180 DEG C, is then supplied to and is heated to 280 DEG C
Extruder A, make these polymer in a manner of A layers/B layers/A layers (8 μm/137 μm/8 μm) by laminated device and carry out lamination,
Sheet is shaped to by T-shaped mould tool.And then cooled and solidified the film using the cooling drum that surface temperature is 25 DEG C, will thus
The unstretching film importing of acquisition is heated to 85~98 DEG C of roller group, and 3.4 times of longitudinal stretching, utilize 21 DEG C of roller group along its length
Cooling.Then, while having carried out the both ends of the film of longitudinal stretching with clip clamping, while importing in stenter, 120 are being heated to
DEG C atmosphere in along the direction cross directional stretch 3.6 times vertical with length direction.Then 200 DEG C of thermosetting is carried out in stenter
Fixed, equably Slow cooling, is subsequently cooled to room temperature, and acquisition has carried out biaxial stretch-formed stack membrane.Light reflection base will be used as
The physical property of material is shown in table 1.
Thus, white reflection film of the invention can be stably film-made, and display surface shape (get experiment ready, lead by heavy duty
Tabula rasa pollution, luminance nonuniformity reduce) excellent characteristic.
(embodiment 9)
(top layer (A))
By the above method by amorphism cyclic olefine resin A (Japanese ゼ オ Application Co. Ltd. system, trade name " ZEONOR
1430R ", density (ASTMD792)：1.01g/cm3, glass transition temperature Tg (JISK7121)：133 DEG C of particle and poly- third
(" ノ バ テ ッ Network PPEA9 " particle is with 30 for Japanese Port リ プ ロ Co. Ltd. systems, trade name for olefine resin:70 mass ratio mixes
The material formed is closed to supply to extruder A.
((B) containing alveolate substrate layer)
By the above method by acrylic resin (Japanese Port リ プ ロ Co. Ltd. systems, trade name " ノ バ テ ッ Network PP
FY6HA " particle and titanium oxide (KRONOS societies system, trade name " KRONOS2230 ", Titanium Dioxide Rutile Top grade, Al, at Si surfaces
Reason, TiO2Content 96.0%, autofrettage：Chlorine method) with 50:The material that 50 mass ratio mixes is supplied to extruder B.
(making of white reflection film)
In each extruder, melting mixing is carried out at 200 DEG C and 230 DEG C, it is had in 2 kinds 3 layers of T-shaped mould
Middle interflow, slabbing is extruded in a manner of as the 3-tier architecture of layer (A)/layer (B)/layer (A), is cooled and solidified, form lamination
Piece.The laminated sheet of gained is subjected to 2 times of roller stretchings along MD at 130 DEG C of temperature, then further carries out 3 along TD at 130 DEG C
The stretching of times stenter, it is biaxial stretch-formed so as to carry out, obtain thick 150 μm of (resin beds (A)：8 μm, resin bed (B)：134 μm) it is white
Color reflectance coating.Table 1 is shown in using as light reflection with the physical property of base material.
Thus, white reflection film of the invention can be stably film-made, and display surface shape (get experiment ready, lead by heavy duty
Tabula rasa pollution, luminance nonuniformity reduce) excellent characteristic.
(embodiment 10~12)
By (PBT/PTMG) copolymer 5 of PET57 mass parts, polybutylene terephthalate (PBT) and polytetramethylene glycol
Mass parts (trade name：East レ デ ュ ポン societies Ha イ ト レ Le), make relative to ethylene glycol be 33mol% 1,4- hexamethylenes
Polyethylene terephthalate (33mol%CHDM is copolymerized PET) 8 mass parts, poly- (5- first are copolymerized obtained by dimethanol copolymerization
Base) 20 mass parts of ENB, the adjustment mixing of the parts by weight of Titanium Dioxide Rutile Top grade 10, dry 3 hours at 180 DEG C, then supply
To the extruder B (B layers) for being heated to 270~300 DEG C.
On the other hand, as layer (A), PET, PET-I, ester ring type structure b " EASTAR " (registration mark) are used
(Eastman Chemical Company societies system), is mixed with the ratio shown in table 1, is dried in vacuo 3 hours at 180 DEG C,
It is then supplied to and is heated to 280 DEG C of extruder A, these polymer is filled in a manner of as A layers/B layers/A layers by lamination
Put and carry out lamination, sheet is shaped to by T-shaped mould tool.It is and then the film is cold using the cooling drum progress that surface temperature is 25 DEG C
But solidify, the importing of thus obtained unstretching film be heated to 85~98 DEG C of roller group, along its length 3.4 times of longitudinal stretching,
Cooled down using 21 DEG C of roller groups.Then, while having carried out the both ends of the film of longitudinal stretching with clip clamping, while importing stenter
In, along the direction cross directional stretch 3.6 times vertical with length direction in 120 DEG C of atmosphere is heated to.Then enter in stenter
The heat fixation that 200 DEG C of row, equably Slow cooling, is subsequently cooled to room temperature, obtains and has carried out the folded of 150 μm of biaxial stretch-formed thickness
Tunic.In addition, the discharge rate by adjusting extruder A and extruder B, so that will in the state of making all thickness be 150 μm
Skin depth is adjusted to 8 μm~12 μm.
The light reflection of the stack membrane of gained is shown in table 1 with the physical property of base material.Thus, white reflection film of the invention can
Stably it is film-made, the excellent characteristic of display surface shape (heavy duty gets experiment, light guide plate pollution, luminance nonuniformity reduction ready).
(comparative example 1~6)
In the compound film forming apparatus with main extruder and secondary extruder, it is changed to the cooperation shown in table 2 and is filmed.
In comparative example 1,6, because main projection is particle, therefore light guide plate produces damage.In comparative example 3~6,
According to the ratio shown in table 2 using alicyclic structure a " TRITAN " (Eastman Chemical Company societies system), as alicyclic ring knot
Structure b " EASTAR " (registration mark) (Eastman Chemical Company societies system), " ECOZEN " as alicyclic structure d
(SK chemicals societies system)) mixing, raw material similarly to Example 1, under the conditions of supply to extruder A, it is anti-to make white
Film is penetrated, as a result in comparative example 2,3,5, SRa is small and luminance nonuniformity occurs, and SRa is big in comparative example 4 and light guide plate dirt occurs
Dye.
(comparative example 7,8)
By (PBT/PTMG) copolymer 5 of PET57 mass parts, polybutylene terephthalate (PBT) and polytetramethylene glycol
Mass parts (trade name：East レ デ ュ ポン societies Ha イ ト レ Le), make relative to ethylene glycol be 33mol% 1,4- hexamethylenes
Polyethylene terephthalate (33mol%CHDM is copolymerized PET) 8 mass parts, poly- (5- first are copolymerized obtained by dimethanol copolymerization
Base) 20 mass parts of ENB, the adjustment mixing of the parts by weight of Titanium Dioxide Rutile Top grade 10, dry 3 hours at 180 DEG C, then supply
To the extruder B (B layers) for being heated to 270~300 DEG C.
On the other hand, as layer (A), PET, PET-I, ester ring type structure b " EASTAR " (registration mark) are used
(Eastman Chemical Company societies system), is mixed with the ratio shown in table 1, is dried in vacuo 3 hours at 180 DEG C,
It is then supplied to and is heated to 280 DEG C of extruder A, these polymer is filled in a manner of as A layers/B layers/A layers by lamination
Put and carry out lamination, sheet is shaped to by T-shaped mould tool.It is and then the film is cold using the cooling drum progress that surface temperature is 25 DEG C
But solidify, the importing of thus obtained unstretching film be heated to 85~98 DEG C of roller group, along its length 3.4 times of longitudinal stretching,
Cooled down using 21 DEG C of roller groups.Then, while having carried out the both ends of the film of longitudinal stretching with clip clamping, while importing stenter
In, along the direction cross directional stretch 3.6 times vertical with length direction in 120 DEG C of atmosphere is heated to.Then enter in stenter
The heat fixation that 200 DEG C of row, equably Slow cooling, is subsequently cooled to room temperature, obtains and has carried out the folded of 150 μm of biaxial stretch-formed thickness
Tunic.In addition, the discharge rate by adjusting extruder A and extruder B, so that will in the state of making all thickness be 150 μm
Skin depth is adjusted to 3 μm.
Light reflection as the stack membrane of gained is shown in table 2 with the physical property of base material.SRa is small and there occurs luminance nonuniformity
It is even.
(comparative example 9~10)
In the compound film forming apparatus with main extruder and secondary extruder, it is changed to matching somebody with somebody shown in table 2 be merged into capable system
Film.
Because main projection is particle c, therefore light guide plate damages.
Industrial applicability
The white reflection film of the present invention can be used for backlight, wherein it is possible to be suitably used for the liquid crystal display of side-light type
With the illumination area source such as backlight and signboard, automatic vending machine.Various area sources are formed furthermore it is also possible to suitably serve as
Reflecting plate, require reflection characteristic solar cell module diaphragm seal, backboard.Furthermore it is also possible to block as paper sub
Piece, label, seal, express waybill, image printer developing-out paper, ink-jet printer, bar-code printer developing-out paper, sea
Used in the various hard copies such as report, map, dust-free paper, display board, blank, thermal transfer, offset printing, phonecard, IC-card
The building materials such as the base material of receiver sheet, wallpaper, the indoors outer ligthing paraphernalia used, indirect lighting utensil, it is equipped on automobile, iron
The electronic unit of component, circuit material use in road, aircraft etc. etc. uses.
Claims (9)
1. a kind of side enters type backlight white reflection film, meet following (i)~(iii),
(i) it is to comprise at least top layer (A) and more than 2 layers of the stack membrane containing alveolate substrate layer (B),
(ii) the median plane mean roughness SRa on the surface of top layer (A) be 90nm less than 300nm,
(iii) top layer (A) has following regions, and the region polymer different by the polymer from forming matrix is formed.
2. side according to claim 1 enters type backlight white reflection film, the interfacial thickness in the region for 20nm with
Upper and below 1,000nm.
3. side according to claim 1 or 2 enters type backlight white reflection film, it is characterised in that in observation top layer (A)
Section when, the shape in the region described in claim 1 or 2 is the length of thickness direction：The ratio of the length of length direction is
1:3~50.
4. side according to claim 1 or 2 enters type backlight white reflection film, top layer (A) contains particle, and its particle contains
Amount is less than 5 mass %.
5. side according to claim 1 enters type backlight white reflection film, 20 ° of the glossiness of top layer (A) with 85 °
The difference of glossiness is more than 50%.
6. side according to claim 1 enters type backlight white reflection film, at least containing in top layer (A) has alicyclic ring knot
The polyester or polyolefin of structure.
7. side according to claim 1 enters type backlight white reflection film, top layer (A) is made up of two or more polymer,
The decrease temperature crystalline temperature Tmc of the top layer (A) difference is 10 DEG C less than 40 DEG C.
8. a kind of back light for liquid crystal display device, its usage right requires the film described in 1 to be made.
9. back light for liquid crystal display device according to claim 7, light source is light emitting diode.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015143701 | 2015-07-21 | ||
| JP2015-143701 | 2015-07-21 | ||
| PCT/JP2016/068064 WO2017013976A1 (en) | 2015-07-21 | 2016-06-17 | White reflective film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107615109A true CN107615109A (en) | 2018-01-19 |
| CN107615109B CN107615109B (en) | 2020-05-08 |
Family
ID=57833858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680032741.5A Active CN107615109B (en) | 2015-07-21 | 2016-06-17 | White reflective film |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6862829B2 (en) |
| KR (1) | KR102590694B1 (en) |
| CN (1) | CN107615109B (en) |
| TW (1) | TWI697698B (en) |
| WO (1) | WO2017013976A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114428416A (en) * | 2021-12-31 | 2022-05-03 | 宁波长阳科技股份有限公司 | High-compression-resistance high-brightness coating type polyester reflective film for mobile phone backlight module |
| CN114754336A (en) * | 2021-11-02 | 2022-07-15 | 广东皇智照明科技有限公司 | Sensor-controlled lighting device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112297552A (en) * | 2019-07-31 | 2021-02-02 | 宁波长阳科技股份有限公司 | White reflective polyester film |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008158134A (en) * | 2006-12-22 | 2008-07-10 | Asahi Kasei Corp | Reflection sheet |
| JP2012158167A (en) * | 2010-07-16 | 2012-08-23 | Mitsubishi Plastics Inc | Reflective material |
| JP2014186319A (en) * | 2013-02-19 | 2014-10-02 | Mitsubishi Plastics Inc | Reflective film, and liquid crystal display device, illumination device, and decorative articles having the same |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5578177U (en) | 1978-11-22 | 1980-05-29 | ||
| JP3683965B2 (en) | 1995-01-27 | 2005-08-17 | 三井化学株式会社 | Light reflector and light reflector using the same |
| JP4712252B2 (en) | 2001-09-19 | 2011-06-29 | 恵和株式会社 | Reflective sheet and backlight unit using the same |
| JP4967274B2 (en) * | 2004-08-06 | 2012-07-04 | 東レ株式会社 | Light reflecting film and surface light source using the same |
| JPWO2009001670A1 (en) * | 2007-06-05 | 2010-08-26 | 帝人株式会社 | Polycarbonate resin composition |
| JP2010237670A (en) * | 2009-03-13 | 2010-10-21 | Toray Ind Inc | White film, and surface light source using the same |
| WO2014129372A1 (en) * | 2013-02-19 | 2014-08-28 | 三菱樹脂株式会社 | Reflective film, and liquid crystal display device, lighting device and ornamental article, each of which is provided with reflective film |
| WO2015046176A1 (en) * | 2013-09-25 | 2015-04-02 | 旭硝子株式会社 | Fluorinated elastomer composition and method for producing same, molded article, crosslinked material, and coated electric wire |
| JP6424474B2 (en) * | 2014-06-04 | 2018-11-21 | 三菱ケミカル株式会社 | Reflective film, liquid crystal display device comprising the same, lighting device, decorative article |
-
2016
- 2016-06-17 WO PCT/JP2016/068064 patent/WO2017013976A1/en active Application Filing
- 2016-06-17 KR KR1020177030152A patent/KR102590694B1/en active IP Right Grant
- 2016-06-17 CN CN201680032741.5A patent/CN107615109B/en active Active
- 2016-06-17 JP JP2016554755A patent/JP6862829B2/en active Active
- 2016-07-20 TW TW105122822A patent/TWI697698B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008158134A (en) * | 2006-12-22 | 2008-07-10 | Asahi Kasei Corp | Reflection sheet |
| JP2012158167A (en) * | 2010-07-16 | 2012-08-23 | Mitsubishi Plastics Inc | Reflective material |
| JP2014186319A (en) * | 2013-02-19 | 2014-10-02 | Mitsubishi Plastics Inc | Reflective film, and liquid crystal display device, illumination device, and decorative articles having the same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114754336A (en) * | 2021-11-02 | 2022-07-15 | 广东皇智照明科技有限公司 | Sensor-controlled lighting device |
| CN114428416A (en) * | 2021-12-31 | 2022-05-03 | 宁波长阳科技股份有限公司 | High-compression-resistance high-brightness coating type polyester reflective film for mobile phone backlight module |
| CN114428416B (en) * | 2021-12-31 | 2023-09-19 | 宁波长阳科技股份有限公司 | High compression-resistant high-brightness coating type polyester reflecting film for mobile phone backlight module |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI697698B (en) | 2020-07-01 |
| TW201708851A (en) | 2017-03-01 |
| WO2017013976A1 (en) | 2017-01-26 |
| JPWO2017013976A1 (en) | 2018-04-26 |
| CN107615109B (en) | 2020-05-08 |
| JP6862829B2 (en) | 2021-04-21 |
| KR102590694B1 (en) | 2023-10-18 |
| KR20180033118A (en) | 2018-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102713692B (en) | White reflective film for edge-lit backlight and backlight using the aforementioned | |
| CN101600977B (en) | Surface light-diffusing polyester film | |
| JP2013041021A (en) | White reflective film | |
| JP6295664B2 (en) | White polyester film for liquid crystal display, method for producing the same, and backlight for liquid crystal display | |
| CN107615109A (en) | White reflection film | |
| JP6597306B2 (en) | Polyester film | |
| JPWO2005123385A1 (en) | Laminated film for reflector | |
| JP2011197225A (en) | Matted polyester film for releasing polarizing sheet | |
| JP2007178788A (en) | Method for manufacturing light diffusion film, and light diffusion film | |
| WO2013032270A2 (en) | Optical film and preparation method thereof | |
| JP2007178505A (en) | White polyester film for display reflecting plate | |
| JP5147470B2 (en) | Laminated biaxially stretched polyester film | |
| JP2018072496A (en) | White reflective film for edge light type backlight and backlight for liquid crystal display using the same | |
| KR20180033140A (en) | White reflective film | |
| JP2006187910A (en) | Biaxially oriented laminated film | |
| JP5108271B2 (en) | Biaxially stretched laminated polyester film | |
| JP2018125117A (en) | White reflection film for edge light type backlight, and backlight for liquid crystal display using the same | |
| JP2019045779A (en) | White reflective film for edge-lit backlight unit and backlight unit for liquid crystal display using the same | |
| JP2014126638A (en) | Reflective film for liquid crystal display | |
| JP2012053092A (en) | Light-diffusion laminated polyester film for backlight | |
| JP5114661B2 (en) | Light diffusing film and method for producing the same | |
| JP2007023185A (en) | Aliphatic polyester resin reflecting film and reflecting plate | |
| JP2016093947A (en) | White polyester film for liquid crystal display, and backlight for liquid crystal display using the same | |
| JP5835532B1 (en) | Reflective film for edge light type backlight and backlight using the same | |
| WO2016035536A1 (en) | White polyester film for liquid crystal displays and backlight for liquid crystal displays using same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |