CN103797386A - Foamed sheet, and light reflector and backlight panel both formed using same - Google Patents
Foamed sheet, and light reflector and backlight panel both formed using same Download PDFInfo
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- CN103797386A CN103797386A CN201380003025.0A CN201380003025A CN103797386A CN 103797386 A CN103797386 A CN 103797386A CN 201380003025 A CN201380003025 A CN 201380003025A CN 103797386 A CN103797386 A CN 103797386A
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- layer
- foamed sheet
- thermoplastic polyester
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- sheet
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- 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
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- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
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- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- 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
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0247—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of voids or pores
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0264—Polyester
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- 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
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/202—LCD, i.e. liquid crystal displays
Abstract
A foamed sheet of a structure having at least two layers which comprises thermoplastic polyester resins, the foamed sheet comprising at least one foamed layer and one or more non-foamed layers, at least one of which constitutes a surface layer of the foamed sheet, wherein the non-foamed layers comprise a thermoplastic polyester resin (B) that differs from the thermoplastic polyester resin (A) constituting the foamed layer, the amount of the thermoplastic polyester resin (B) being 50-100 parts by mass, excluding 50 parts by mass, per 100 parts by mass of the whole thermoplastic polyester resin(s) constituting the non-foamed layers, and the exposed surface of the at least one non-foamed layer which constitutes a surface layer has irregularities having an arithmetic average roughness Ra of 3.5 [mu]m or more.
Description
Technical field
The present invention relates to light reflecting board and the backlight panel of a kind of foamed sheet and this foamed sheet of use.
Background technology
In liquid crystal indicator etc., use the backlight panel from the rear side light irradiation of liquid crystal layer.As this backlight panel, can reduce the quantity of light source, thereby increase the employing of the sidelight mode that is conducive to energy-saving.As shown in Figure 3, in side-light backlight panel (30), be adjacent to light guide plate (31) and be provided with light reflecting board (32).By this light reflecting board, be directed in light guide plate and be back to liquid crystal layer side to the light of light reflecting board side leakage from light source (34), therefore can make from the emergent light of light source (34) effectively outgoing to liquid crystal layer side, thereby the brightness that can more improve liquid crystal indicator.
In the backlight panel (30) of sidelight mode, conventionally, between light reflecting board (32) and light guide plate (31), be formed with gap (35) with specific interval.Its reason is, if light reflecting board and light guide plate are connected airtight, can produce the bright part of locality that is called as white point, likely in brightness, produces uneven.If be described more specifically, if light reflecting board and light guide plate are connected airtight, for example in the time that light guide plate etc. is out of shape locally because of heat etc., this position is pressed by light reflecting board consumingly with respect to other position, can become the factor of white point etc. thereby the brightness at this position changes.
As the method that space is set between light guide plate and light reflecting board, known have a following method: the material that is mixed with crosslinked acryl bead etc. in bonding agent is applied to the surface (patent documentation 1) of light reflecting board or concavo-convex (patent documentation 2～5) is directly set on the surface of light reflecting board.
Prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2005-25183 communique
Patent documentation 2: TOHKEMY 2003-121616 communique
Patent documentation 3: TOHKEMY 2003-270415 communique
Patent documentation 4: International Publication WO2007/142260 pamphlet
Patent documentation 5: TOHKEMY 2001-266629 communique
Summary of the invention
But, utilizing bead to maintain in the method in gap of light reflecting board and light guide plate as patent documentation 1, need to disperse equably bead to be then coated with.Therefore, need extra use bead, thereby fee of material is raise, and need painting process, therefore manufacture efficiency also poor.
In addition, as recorded in patent documentation 2～4, use foamed sheet also universal gradually as the method for light reflecting board, but the manufacture of the light diffusion reflection sheet that patent documentation 2～4 is recorded, light-reflecting sheet or foaming body is to make to form concavo-convex on its surface after sheet foaming, therefore be difficult to concavo-convex formation to carry out accurate control, in the case of as the light reflecting board of backlight panel, white point produces preventive (anti-white point, ホ ワ イ ト ス Port ッ ト patience) still cannot say sufficient.
Problem of the present invention is to provide a kind of foamed sheet, and it is that precision is formed with specific concavo-convex foamed sheet well on surface, and this foamed sheet demonstrates excellent performance as the light reflecting board of backlight panel.
The inventor, in order to solve above-mentioned problem, repeats further investigation.Its result, find following content: if use the resin sheet of the sandwich construction being formed by specific thermoplastic polyester, thereby desired make after concavo-convex not active gases infiltrate into this resin sheet to foam, also maintain initial concaveconvex shape on the surface of obtained foamed sheet even if form on this resin sheet surface.Further, find following content: if this foamed sheet is used as to the light reflecting board of backlight panel, can effectively suppress the generation of white point.The present invention completes based on these opinions.
, purport of the present invention is as follows.
< 1 > foamed sheet, it is the foamed sheet of at least 2 layers of structure being made up of thermoplastic polyester, wherein,
This foamed sheet has at least 1 layer of foaming layer and at least 1 layer of nonfoamed layer, and the top layer of at least 1 layer of this foamed sheet of formation of nonfoamed layer;
In nonfoamed layer, with respect to whole thermoplastic polyesters 100 quality that form this nonfoamed layer, contain and exceed 50 mass parts and the different thermoplastic polyester (B) of the thermoplastic polyester (A) from forming foaming layer below 100 mass parts;
At the face that exposes that forms at least 1 layer of nonfoamed layer of top layer, be formed with arithmetic average roughness Ra and be more than 3.5 μ m concavo-convex.
< 2 > are as the foamed sheet of < 1 >, and it is the foamed sheet of the 3-tier architecture that is made up of thermoplastic polyester, wherein,
This foamed sheet has clamping foaming layer and 2 nonfoamed layers opposite to one another;
In this nonfoamed layer, with respect to whole thermoplastic polyesters 100 mass parts that form this nonfoamed layer, contain and exceed 50 mass parts and the different thermoplastic polyester (B) of the thermoplastic polyester (A) from forming foaming layer below 100 mass parts;
At the face that exposes of at least one nonfoamed layer, be formed with arithmetic average roughness Ra and be more than 3.5 μ m concavo-convex.
< 3 > are as the foamed sheet of < 1 > or < 2 >, wherein, thermoplastic polyester (A) is made up of polyethylene terephthalate.
< 4 > are as the foamed sheet of any one in < 1 >～< 3 >, wherein, thermoplastic polyester (B) is made up of polybutylene terephthalate.
< 5 > are as the foamed sheet of any one in < 1 >～< 4 >, and wherein, the proportion of this foamed sheet is 0.2～0.7.
< 6 > are as the foamed sheet of any one in < 1 >～< 5 >, and wherein, the thickness of this foamed sheet is 0.25mm～1.0mm.
< 7 > are as the foamed sheet of any one in < 1 >～< 6 >, the average diameter of the bubble that wherein, foaming layer has is 0.1 μ m～10.0 μ m.
< 8 > light reflecting board, its foamed sheet by any one in < 1 >～< 7 > forms.
< 9 > backlight panel, it possesses the light reflecting board of < 8 >, the arithmetic average roughness Ra that is arranged on this light reflecting board is the light guide plate of male and fomale(M&F)s more than 3.5 μ m and the light source that is arranged on the side of above-mentioned light guide plate, wherein
Concavo-convex by this of this light reflecting board surface, between this light reflecting board and this light guide plate, be formed with the gap producing because of this recess.
The manufacture method of the foamed sheet of any one in < 10 > < 1 > to < 7 >, it comprises following operation (a)～(c):
(a) to by being used to form the thermoplastic polyester layer (C) of at least 1 layer of foaming layer, being formed with the thermoplastic polyester layer (D) of at least 1 layer that is used to form nonfoamed layer, and at least 1 layer of thermoplastic polyester layer (D) resin sheet that forms at least 2 layers of structure that top layer forms is implemented embossing processing, thereby form concavo-convex operation at the face that exposes of at least 1 layer of thermoplastic polyester layer (D) on the top layer that forms this resin sheet;
(b) active gases is not infiltrated into implement the operation of the resin sheet of embossing processing; And
(c) there is the not resin sheet of active gases to heat to infiltration, thereby make the operation of above-mentioned thermoplastic polyester layer (C) foaming.
< 11 > are as the manufacture method of < 10 >, wherein, in operation (c), the thermoplastic polyester layer (D) that is used to form nonfoamed layer does not foam.
In this manual, the term of so-called " thermoplastic polyester " uses with following implication: except by a kind of resin that thermoplastic polyester was formed, also comprise the hybrid resin being made up of thermoplastic polyester of more than two kinds.
In this manual, so-called certain raw material, parts or formation " is made up of thermoplastic polyester " or " being formed by thermoplastic polyester " used with following implication: except the mode that this raw material, parts or formation are only made up of thermoplastic polyester, also comprise by the mode that has the composition of various adjuvants to form in thermoplastic polyester mixture.
Particularly, the mode that 80 mass parts～100 mass parts of certain raw material, parts or formation are made up of thermoplastic polyester is the mode of " being made up of thermoplastic polyester " or " being formed by thermoplastic polyester ".In addition, so-called " being made up of thermoplastic polyester " or " being formed by thermoplastic polyester " refers to following mode: be preferably 90 mass parts～100 mass parts, more preferably 95 mass parts～100 mass parts are made up of thermoplastic polyester.Foregoing is also identical at thermoplastic polyester in by the concrete specific situation of resin name.
In this manual, so-called " top layer " means the outermost layer of sheet.It should be noted that, if sheet is 2 layers of structure, arbitrary layer is top layer.
Foamed sheet of the present invention is the foamed sheet of the thermoplastic polyester that is more critically controlled of its surperficial concaveconvex shape.
Above-mentioned and further feature of the present invention and advantage can be suitably with reference to accompanying drawing, according to following record and clearer and more definite.
Accompanying drawing explanation
Fig. 1 is the mode chart that represents the longitudinal section of a mode of foamed sheet of the present invention.
Fig. 2 is the mode chart representing for the longitudinal section of a mode of the resin sheet of the manufacture of foamed sheet of the present invention.
Fig. 3 is the mode chart that represents a mode of backlight panel of the present invention.
Embodiment
Below, with reference to accompanying drawing, at length the embodiment of foamed sheet of the present invention is described, but the present invention is not limited by this embodiment.
A preferred embodiment of foamed sheet of the present invention is schematically shown in to Fig. 1.The foamed sheet (10) that Fig. 1 records has following structure: the nonfoamed layer (12) that possesses the both sides of foaming layer (11) and this foaming layer.
This foaming layer (11) forms by thermoplastic polyester with this nonfoamed layer (12), but in each nonfoamed layer (12,12), with respect to whole thermoplastic polyesters 100 mass parts that form each nonfoamed layer, contain and exceed 50 mass parts and the different thermoplastic polyester of the thermoplastic polyester from forming this foaming layer (11) below 100 mass parts respectively.In addition, at least one face of foamed sheet of the present invention possesses specific concaveconvex shape.
In addition, foamed sheet of the present invention can be also 2 layers of structure that are made up of foaming layer and nonfoamed layer.,, in the mode of Fig. 1, do not exist the not mode of the irregular nonfoamed layer of tool to be also contained in foamed sheet of the present invention.
In addition, foamed sheet of the present invention also can be 4 layers of above structure.,, in the mode of Fig. 1, be further provided with the mode of foaming layer or be also contained in foamed sheet of the present invention in the mode that this foaming layer is further provided with nonfoamed layer at the irregular nonfoamed layer of tool not.
[foaming layer]
The foaming layer of foamed sheet of the present invention is made up of thermoplastic polyester.To this thermoplastic polyester, there is no particular restriction, can enumerate for example polyethylene terephthalate, PTT, polybutylene terephthalate (PBT), PEN, PBN or their hybrid resin.Wherein, preferably use polyethylene terephthalate.In this manual, sometimes will form the thermoplastic polyester of foaming layer specifically for " thermoplastic polyester (A) ".In the situation that foamed sheet of the present invention has more than 2 layers foaming layer, preferred all foaming layers are identical composition.
In addition, foaming layer is preferably by the thermoplastic polyester that is added with bubble nucleator as adjuvant and forms.By adding bubble nucleator, can in thermoplastic resin, generate more nuclei of bubbles.Thus, in following foamed process, the bubble phase mutual resistance generating hinders bubble growth each other, therefore can form the foaming layer with finer bubble.To this bubble nucleator, there is no particular restriction, but preferably use polyester based elastomers.
Preferably, with respect to thermoplastic resin 100 mass parts, mixture has the bubble nucleator of 0.1 mass parts～10 mass parts.
Except above-mentioned thermoplastic resin, bubble nucleator, foaming layer also can contain the various adjuvants such as crystallization nucleator, crystallization promoter, antioxidant, antistatic agent, ultraviolet inhibitor, light stabilizer, fluorescer, pigment, dyestuff, compatilizer, lubricant, hardening agent, fire retardant, crosslinking chemical, crosslinking coagent, plasticiser, tackifier, viscosity depressant.
The foaming layer that foamed sheet of the present invention possesses has bubble.From the viewpoint of the light reflectivity of foaming body, the average diameter (average bubble footpath) of this bubble be preferably the above 10.0 μ m of 0.1 μ m following, more preferably 7.0 μ m following, more preferably 5.0 μ m following, further more preferably 3.0 μ m following, further more preferably below 2.0 μ m.In addition, more than this average bubble footpath is generally 0.5 μ m, more than also can be 1.0 μ m.
[nonfoamed layer]
In the nonfoamed layer of foamed sheet of the present invention, with respect to whole thermoplastic polyesters 100 mass parts (forming in whole thermoplastic polyesters 100 mass parts of this nonfoamed layer) that form this nonfoamed layer, contain and exceed 50 mass parts and the different thermoplastic polyester (below also referred to as thermoplastic polyester (B)) of the thermoplastic polyester (A) from forming foaming layer below 100 mass parts.In nonfoamed layer 100 mass parts, the content of thermoplastic polyester (B) is preferably 60 mass parts～100 mass parts, more preferably 70 mass parts～100 mass parts, further more preferably 75 mass parts～100 mass parts, further 80 mass parts～100 mass parts more preferably.
In nonfoamed layer, with respect to whole thermoplastic polyesters 100 mass parts that form this nonfoamed layer, contain thermoplastic polyester (B) to exceed 50 mass parts, can in nonfoamed layer, form thus the phase structure as sea, using thermoplastic polyester (A) as island using thermoplastic polyester (B).As mentioned above, phase structure controlled and using thermoplastic polyester (B) as sea, can, in one step foaming operation as described below, be formed foaming layer and nonfoamed layer thus simultaneously.In addition, by being this phase structure, can after foaming, also maintain fully the concavo-convex of the sheet surface that forms before foaming.
As the preferred exemplary of above-mentioned thermoplastic polyester (B), can enumerate polybutylene terephthalate, PEN, PTT, PEN, PBN etc. or their hybrid resin, wherein be preferably polybutylene terephthalate.In the situation that foamed sheet of the present invention has more than 2 layers nonfoamed layer, preferred all nonfoamed layers are identical composition.
Except above-mentioned thermoplastic polyester, the nonfoamed layer of foamed sheet of the present invention also can contain the various adjuvants such as crystallization nucleator, crystallization promoter, antioxidant, antistatic agent, ultraviolet inhibitor, light stabilizer, fluorescer, pigment, dyestuff, compatilizer, lubricant, hardening agent, fire retardant, crosslinking chemical, crosslinking coagent, plasticiser, tackifier, viscosity depressant.
In foamed sheet of the present invention, the face that exposes of at least 1 layer in the nonfoamed layer that forms top layer is formed with specifically concavo-convex.That is, expose at least one surface of foamed sheet of the present invention the surface that has nonfoamed layer, expose face (in exposing the two sides that face is sheet at least one side in this two sides of nonfoamed layer) and be formed with specifically concavo-convex at this.
The arithmetic average roughness Ra that this male and fomale(M&F) is is more than 3.5 μ m.If this Ra is too small, for example in the case of by foamed sheet as the light reflecting board of backlight panel, likely cannot and light guide plate between form sufficient gap.More than this Ra is preferably 3.8 μ m, more preferably more than 4.0 μ m.In addition, the aspect consideration of the flatness of the sheet from foaming, this Ra is preferably below 15 μ m, more preferably below 10 μ m.
In foamed sheet of the present invention, also comprise following sheet: form concavo-convexly on its two sides, the arithmetic average roughness Ra of one of them face is that 3.5 μ m are above, the arithmetic average roughness Ra of another face is below 3.5 μ m.
In foamed sheet of the present invention, arithmetic average roughness Ra is that the concavo-convex equispaced RSm on nonfoamed layer surfaces more than 3.5 μ m is preferably 300 μ m～700 μ m, 400 μ m～600 μ m more preferably.By possessing the concavo-convex interval of this systematicness, the performance of foamed sheet entirety becomes more homogeneous.Therefore, for example, in the time that this foamed sheet is used as to the light reflecting board of backlight panel, the brightness of shown image becomes more even.
Except above-mentioned thermoplastic resin, nonfoamed layer also can contain the various adjuvants such as crystallization nucleator, crystallization promoter, antioxidant, antistatic agent, ultraviolet inhibitor, light stabilizer, fluorescer, pigment, dyestuff, compatilizer, lubricant, hardening agent, fire retardant, crosslinking chemical, crosslinking coagent, plasticiser, tackifier, viscosity depressant.
[manufacture of foamed sheet]
There is no particular restriction for the manufacture method of foamed sheet of the present invention, but the situation that is 3-tier architecture by foamed sheet is enumerated as example, hereinafter an example of its manufacture method described.
First, as shown in Figure 2 a, prepare the resin sheet (20) of 3-tier architecture, it is by being used to form the thermoplastic polyester layer (21) of foaming layer, being formed with the thermoplastic polyester layer that is used to form nonfoamed layer (22,22) that is formed on its two sides.This resin sheet (20) can prepare by integrally formed.This resin sheet (20) is preferably by utilizing the integrally formed of coextrusion to prepare.It should be noted that, the thermoplastic polyester layer that is used to form foaming layer is made up of the thermoplastic polyester that forms above-mentioned foaming layer, and the thermoplastic resin that is used to form nonfoamed layer is made up of the thermoplastic resin that forms above-mentioned nonfoamed layer.
Next, as shown in Figure 2 b, on the thermoplastic polyester layer that is used to form nonfoamed layer, form multiple recesses (23) and protuberance (24).In this concavo-convex formation, for example, can make resin sheet by having between a pair of dandy roll of the recess corresponding with the desired convex form of wanting to form, thereby utilize this roller to form concavo-convex on the surface of resin sheet (20).,, by resin sheet being implemented to embossing processing, can form concavo-convex on resin sheet surface.It should be noted that, Fig. 2 b is illustrated in 2 thermoplastic polyester layers that are used to form nonfoamed layer 1 surface and forms concavo-convex situation, but also can be according to object and form concavo-convex on both surface of 2 thermoplastic polyester layers that are used to form nonfoamed layer.
Formed this concavo-convex resin sheet and be the sheet before infiltration or the foamed process of implementing active gases not, even if therefore implement embossing processing, the distortion of the inside of sheet is also less, thus can precision form well desired concavo-convex.
Next, make not active gases infiltrate into the irregular resin sheet of formation.Preferably, overlap to reel and form roller by forming irregular resin sheet and separator, this roller is remained in the active gases atmosphere of pressurizeing not, thereby make not active gases infiltrate into resin sheet.This separator has active gases not or optionally and the space that the organic solvent using freely passes in and out, and as long as to the separator of the infiltration of itself, can be any separator for ignoring not active gases.If represent the preferred exemplary of separator, can enumerate resinousness nonwoven fabrics or metal net.
It should be noted that, resin sheet preferably permeates not active gases with unstretched state.If stretch, gas likely cannot infiltrate in sheet fully.
Also can, not active gases is infiltrated into before the resin sheet that is formed as roller, make resin sheet contain organic solvent.If make resin sheet contain organic solvent, can improve the crystallinity of thermoplastic resin sheet, improve the rigidity of sheet, thereby become the vestige being difficult at sheet remained on surface separator.In addition, also can expect to shorten the not effect of the time of penetration of active gases.
As this organic solvent, can enumerate for example benzene, toluene, methyl ethyl ketone, ethyl formate, acetone, acetic acid, diox, metacresol, aniline, vinyl cyanide, repefral, nitroethane, nitromethane, benzylalcohol.Wherein, preferably use acetone.
As above-mentioned not active gases, can enumerate helium, nitrogen, carbon dioxide, argon etc.Wherein, from can contain in a large number thermoplastic resin aspect consider, preferably carbon dioxide.The seepage pressure of active gases is not preferably 30kg/cm
2～70kg/cm
2, 50kg/cm more preferably
2～70kg/cm
2.In addition, the time of penetration of active gases is not generally more than 1 hour, preferably makes till active gases does not infiltrate into the state of reaching capacity.
Next, make infiltration have the not resin sheet foaming of active gases.This foamed process is being used to form the thermoplastic resin foaming of foaming layer, is used to form under the condition that the thermoplastic resin of nonfoamed layer do not foam and carries out.Particularly, from roller removal separator, resin sheet is heated to the temperature more than softening point of the thermoplastic resin that is used to form foaming layer, can forms thus foaming layer.This heating is preferably carried out with the temperature of the fusing point lower than foaming layer.If foaming layer is polyethylene terephthalate, the vitrifacation transition temperature temperature above and below fusing point that is the common thermoplastic poly ester type resin with foaming layer for the heating-up temperature foaming is carried out.
The bulk specific weight of the foaming body obtaining can suitably regulate in the following way: to the high pressure container when the gas permeation regulates to the time till foaming after taking out by sheet, regulate thus above-mentioned bulk specific weight.
For the thermoplastic polyester layer foaming that uses to form the thermoplastic polyester layer foaming of foaming layer and do not use to form nonfoamed layer, consider the whole bag of tricks.For example, add crystallization nucleator, crystallization promoter by adding bubble nucleator or be used to form in the thermoplastic resin of nonfoamed layer in the thermoplastic resin that is used to form foaming layer, also can control to a certain extent the foaminess of each resin bed.In addition, adopt the resin of particular types as the vibrin of the formation for each layer, can further control closely thus foaminess.As this thermoplastic polyester and preferred resin is described above.
In addition, be 2 layers of structure or more than 4 layers formations in the formation of foamed sheet, also can manufacture according to above-mentioned manufacturer's rule., the manufacture method of foamed sheet of the present invention preferably comprises following operation (a)～(c):
(a) to by being used to form the thermoplastic polyester layer (C) of at least 1 layer of foaming layer, being formed with the thermoplastic polyester layer (D) of at least 1 layer that is used to form nonfoamed layer, and at least 1 layer of thermoplastic polyester layer (D) resin sheet that forms at least 2 layers of structure on top layer is implemented embossing processing, thereby form concavo-convex operation at the face that exposes of at least 1 layer of thermoplastic polyester layer (D) on the top layer that forms this resin sheet;
(b) active gases is not infiltrated into implement the operation of the resin sheet of embossing processing; And
(c) there is the not resin sheet of active gases to heat to infiltration, thereby make the operation of above-mentioned thermoplastic polyester layer (C) foaming.
In addition, be 3-tier architecture as shown in Figure 1 at foamed sheet of the present invention, the manufacture method of this foamed sheet preferably comprises following operation (d)～(f).
(d) resin sheet by the 3-tier architecture that is used to form the thermoplastic polyester layer of foaming layer, form with the thermoplastic polyester layer that is used to form nonfoamed layer that is formed on its both sides is implemented to embossing and process, thereby form concavo-convex operation on the surface of this resin sheet;
(e) active gases is not infiltrated into implement the operation of the resin sheet of embossing processing; And
(f) there is the not resin sheet of active gases to heat to infiltration, thereby be used in the operation of the thermoplastic resin foaming that forms foaming layer.
The proportion of foamed sheet of the present invention is preferably 0.2～0.7, and more preferably 0.25～0.6.Further, its proportion also can be made as below 0.5.If such proportion, under normal circumstances, bubble is fine and its distribution is also even.In addition, from realize rigidity and manufacture the viewpoint of efficiency simultaneously, the thickness of foamed sheet of the present invention is preferably 0.25mm～1.0mm, 0.3mm～0.8mm more preferably.Further, also this thickness can be made as below 0.6mm, further be made as below 0.5mm.
There is no particular restriction for the purposes of foamed sheet of the present invention, for example, can preferably be used as light reflecting board, particularly can preferably be used as backlight panel light reflecting board.More specifically, as using at the light reflecting board of the backlight panel of liquid crystal indicator etc. preferably.Foamed sheet of the present invention is formed with specifically concavo-convex, therefore particularly in the case of being used as the light reflecting board of side light type backlight panel, in the boundary surface of light guide plate and light reflecting board, form suitable gap with specific interval, even if because distortion of light guide plate etc. makes light guide plate be pressed by light reflecting board, also can maintain enough gaps because of concavo-convex existence thus.Its result, the formation of white point is inhibited, thereby realizes the backlight panel of uniform luminance.
The light reflectivity of the foamed sheet obtaining by above-mentioned manufacture method is preferably more than 98%.Light reflectivity can be implemented to measure in the following way: use spectrophotometer (U-4100 that Hitachi High-Tech company manufactures), the condition that is 4nm at point optical slits, light splitting total reflectivity when mensuration wavelength of light is 550nm.Now, as reference, use aluminium oxide white plate (210-0740, Hitachi High-Tech Fielding company manufactures), measured value is the relative value with respect to reference.
On foamed sheet of the present invention, also can be coated with the coating that contains above-mentioned various adjuvants etc., this foamed sheet is also contained in foamed sheet of the present invention.
Below, illustrate in greater detail the present invention based on embodiment, but the present invention is not limited to this.
Embodiment
(mensuration, evaluation method)
(1) sheet is thick
Utilize micrometer to measure the thickness of 4 angles of foamed sheet and the protuberance at 4 Ge Bian centers, thereby will add up to the mean value of 8 points thick as sheet.
(2) average bubble footpath
Obtain according to ASTMD3576-77.SEM photo is taken in the longitudinal section of foamed sheet, on this SEM photo, with respect to the lamination direction of each layer of foamed sheet, in the horizontal direction and in vertical direction, draw straight line, thereby obtain the average t of the length of the string of the separated foam of straight line crosscut.The multiplying power of photo is made as to M and the following formula of substitution, thereby obtains average bubble footpath d (d=t/ (0.616 × M)).
(3) proportion
(ρ f) for the proportion of the foamed sheet that the A method (substitution method in water) by JIS K7112 that calculates is measured.
(4) arithmetic average roughness Ra
Evaluate based on JIS B0601 (2001).
(5) the average length RSm of roughness curve key element
Measure based on JIS B0601 (2001).
(6) anti-white point
The backlight panel that is assembled to commercially available side light type liquid crystal display using the foamed sheet of evaluating as light reflecting board, after this re-assemblies backlight panel as original.Next, compress with the load of 40N from the surface of backlight panel, thereby investigate having or not of white point.If do not produce white point, it is qualified to be judged as; If generation white point, is judged as defective.
(embodiment 1)
The foamed sheet of the shape shown in construction drawing 1 (10) in the following manner.
In polyethylene terephthalate (grade: RT553C, Japan Unipet manufactures, ρ s=1.34) add the polyester based elastomers (grade: PRIMALLOY B1942N of 2 mass parts in 100 mass parts, Mitsubishi Chemical manufactures) and mix, using this material as the middle layer that is used to form foaming layer, then being produced on its two sides has by polybutylene terephthalate (grade: NOVADURAN5026, Mitsubishi's engineering plastics (Mitsubishi Engineering Plastics) are manufactured, ρ s=1.31) resin sheet (20) of 3-tier architecture on the top layer that forms.Form concavo-convexly thereby the one side of this resin sheet is implemented to embossing processing, the separator of the ethylene series that next overlaps nonwoven fabrics is also reeled, thereby is formed as roller shape.The arithmetic average roughness Ra of the above-mentioned male and fomale(M&F) to this resin sheet measures, and result is 6.1 μ m.In addition, the RSm of this male and fomale(M&F) is 320 μ m.
After this, above-mentioned roller is put into pressure vessel, be forced into 6MPa with carbon dioxide, thereby make carbon dioxide infiltrate into resin sheet.Time of penetration is made as 72 hours.After infiltration completes, take out roller from pressure vessel, removal separator on one side, is only supplied to resin sheet the heat generator of the above and temperature below fusing point of the softening point of the resin that is set as the middle layer that forms resin sheet on one side, thereby foams.The thickness of the foamed sheet obtaining is that 0.75mm, proportion are 0.54, average bubble footpath is 1.0 μ m.The arithmetic average roughness Ra of the male and fomale(M&F) to this foamed sheet measures, and result is 4.0 μ m, and RSm is 406 μ m.In addition, the light reflectivity of this foamed sheet is more than 98%.
Further, the light reflecting board (32) by obtained foamed sheet as the backlight panel (30) shown in Fig. 3, resists white point evaluation thus, and result is qualified.
(embodiment 2)
The composition on the top layer of embodiment 1 is changed to the polyethylene terephthalate with respect to 20 mass parts, and making polybutylene terephthalate is 80 mass parts, in addition, makes in the same manner foamed sheet with embodiment 1.The thickness of the foamed sheet obtaining is that 0.76mm, proportion are 0.55, average bubble footpath is 1.0 μ m.The arithmetic average roughness Ra of the male and fomale(M&F) to this foamed sheet measures, and result is 4.7 μ m, and RSm is 450 μ m.In addition, the light reflectivity of this foamed sheet is more than 98%.
Further, the light reflecting board as backlight panel by obtained foamed sheet, resists white point evaluation thus in the same manner as described above, and result is qualified.
(embodiment 3)
The composition on the top layer of embodiment 1 is changed to the polyethylene terephthalate with respect to 35 mass parts, and making polybutylene terephthalate is 65 mass parts, in addition, makes in the same manner foamed sheet with embodiment 1.The thickness of the foamed sheet obtaining is that 0.76mm, proportion are 0.55, average bubble footpath is 1.0 μ m.The arithmetic average roughness Ra of the male and fomale(M&F) to this foamed sheet measures, and result is 4.2 μ m, and RSm is 500 μ m.In addition, the light reflectivity of this foamed sheet is more than 98%.
Further, the light reflecting board as backlight panel by obtained foamed sheet, resists white point evaluation thus in the same manner as described above, and result is qualified.
(comparative example 1)
The composition on the top layer of embodiment 1 is changed to the polyethylene terephthalate (grade: RT553C, Japanese Unipet manufacture, ρ s=1.34) with respect to 50 mass parts, making polybutylene terephthalate is 50 mass parts, in addition, make in the same manner foamed sheet with embodiment 1.The thickness of the foamed sheet obtaining is that 0.75mm, proportion are 0.54, average bubble footpath is 1.0 μ m.The arithmetic average roughness Ra of the male and fomale(M&F) to this foamed sheet measures, and result is 3.1 μ m, and RSm is 750 μ m.In addition, the light reflectivity of this foamed sheet is more than 98%.
Further, the light reflecting board as backlight panel by obtained foamed sheet, resists white point evaluation thus in the same manner as described above, and result is defective.
(comparative example 2)
The composition on the top layer of embodiment 1 is changed to the polyethylene terephthalate (grade: RT553C, Japanese Unipet manufacture, ρ s=1.34) with respect to 60 mass parts, making polybutylene terephthalate is 40 mass parts, in addition, make in the same manner foamed sheet with embodiment 1.The thickness of the foamed sheet obtaining is that 0.75mm, proportion are 0.51, average bubble footpath is 1.0 μ m.The arithmetic average roughness Ra of the male and fomale(M&F) to this foamed sheet measures, and result is 2.9 μ m, and RSm is 780 μ m.In addition, the light reflectivity of this foamed sheet is more than 98%.
Further, the light reflecting board as backlight panel by obtained foamed sheet, resists white point evaluation thus in the same manner as described above, and result is defective.
(comparative example 3)
The composition on the top layer of embodiment 1 is changed to the polyethylene terephthalate (grade: RT553C, Japanese Unipet manufacture, ρ s=1.34) of 100 mass parts, in addition, make in the same manner foamed sheet with embodiment 1.The thickness of the foamed sheet obtaining is that 0.75mm, proportion are 0.37, average bubble footpath is 1.0 μ m.The arithmetic average roughness Ra of the male and fomale(M&F) to this foamed sheet measures, and result is 2.4 μ m, and RSm is 820 μ m.In addition, the light reflectivity of this foamed sheet is more than 98%.
Further, the light reflecting board as backlight panel by obtained foamed sheet, resists thus white point and measures in the same manner as described above, and result is defective.
To the results are summarized in above following table 1.
[table 1]
Though the present invention and its embodiment are illustrated, but as long as the present invention does not specify, even illustrating in arbitrary thin portion of the present invention, all non-in order to limit the present invention, and as long as under the spirit of the invention shown in violation of a right claim not and scope, should do the explanation of maximum magnitude.
The application advocates based on the right of priority of on June 18th, 2012 at the Jap.P. Patent 2012-137366 of Japanese publication patent, and the application adds with reference to this application case and using its content the some of recording as this instructions.
Symbol description
10: foamed sheet
11: foaming layer
12: nonfoamed layer
13: bubble
20: resin sheet
21: the thermoplastic polyester layer that is used to form foaming layer
22: the thermoplastic polyester layer that is used to form nonfoamed layer
23: recess
24: protuberance
30: side light type backlight panel
31: light guide plate
32: light reflecting board
33: reverberator
34: light source
35: gap
Claims (11)
1. a foamed sheet, it is the foamed sheet of at least 2 layers of structure being made up of thermoplastic polyester, wherein,
This foamed sheet has at least 1 layer of foaming layer and at least 1 layer of nonfoamed layer, and the top layer of at least 1 layer of this foamed sheet of formation of nonfoamed layer;
In nonfoamed layer, with respect to whole thermoplastic polyesters 100 mass parts that form this nonfoamed layer, contain and exceed 50 mass parts and the different thermoplastic polyester (B) of the thermoplastic polyester (A) from forming foaming layer below 100 mass parts;
At the face that exposes that forms at least 1 layer of nonfoamed layer of top layer, be formed with arithmetic average roughness Ra and be more than 3.5 μ m concavo-convex.
2. foamed sheet as claimed in claim 1, it is the foamed sheet of the 3-tier architecture that is made up of thermoplastic polyester, wherein,
This foamed sheet has clamping foaming layer and 2 nonfoamed layers opposite to one another;
In this nonfoamed layer, with respect to whole thermoplastic polyesters 100 mass parts that form this nonfoamed layer, contain and exceed 50 mass parts and the different thermoplastic polyester (B) of the thermoplastic polyester (A) from forming foaming layer below 100 mass parts;
At the face that exposes of at least one nonfoamed layer, be formed with arithmetic average roughness Ra and be more than 3.5 μ m concavo-convex.
3. foamed sheet as claimed in claim 1 or 2, wherein, thermoplastic polyester (A) is made up of polyethylene terephthalate.
4. the foamed sheet as described in claim 1～3 any one, wherein, thermoplastic polyester (B) is made up of polybutylene terephthalate.
5. the foamed sheet as described in claim 1～4 any one, wherein, the proportion of described foamed sheet is 0.2～0.7.
6. the foamed sheet as described in claim 1～5 any one, wherein, the thickness of described foamed sheet is 0.25mm～1.0mm.
7. the foamed sheet as described in claim 1～6 any one, wherein, the average diameter of the bubble that foaming layer has is 0.1 μ m～10.0 μ m.
8. a light reflecting board, it is made up of the foamed sheet described in claim 1～7 any one.
9. a backlight panel, it possesses:
Light reflecting board claimed in claim 8,
Light guide plate, its arithmetic average roughness Ra that is arranged on this light reflecting board be more than 3.5 μ m male and fomale(M&F),
And light source, it is arranged on the side of described light guide plate;
This backlight panel is characterised in that,
Concavo-convex by this of this light reflecting board surface, between this light reflecting board and this light guide plate, be formed with the gap being produced by this recess.
10. a manufacture method for the foamed sheet described in claim 1～7 any one, it comprises following operation (a)～(c):
(a) resin sheet of following 2 layers of structure is implemented to embossing processing, thereby the face that exposes of at least 1 layer of thermoplastic polyester layer (D) on the top layer that forms this resin sheet forms concavo-convex operation, the resin sheet of described 2 layers of structure is by being used to form the thermoplastic polyester layer (C) of at least 1 layer of foaming layer, forming with the thermoplastic polyester layer (D) of at least 1 layer that is used to form nonfoamed layer, and at least 1 layer of formation top layer of thermoplastic polyester layer (D);
(b) active gases is not infiltrated into implemented the operation of the resin sheet of embossing processing; And
(c) there is the not resin sheet of active gases to heat to infiltration, thereby make the operation of described thermoplastic polyester layer (C) foaming.
11. manufacture methods as claimed in claim 10, wherein, in operation (c), the thermoplastic polyester layer (D) that is used to form nonfoamed layer does not foam.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-137366 | 2012-06-18 | ||
| JP2012137366A JP2014002267A (en) | 2012-06-18 | 2012-06-18 | Foam sheet, light reflection plate using the same, and backlight panel |
| PCT/JP2013/066054 WO2013191031A1 (en) | 2012-06-18 | 2013-06-11 | Foamed sheet, and light reflector and backlight panel both formed using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103797386A true CN103797386A (en) | 2014-05-14 |
| CN103797386B CN103797386B (en) | 2016-08-17 |
Family
ID=49768631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380003025.0A Active CN103797386B (en) | 2012-06-18 | 2013-06-11 | Foamed sheet and the light reflecting board and the backlight panel that use this foamed sheet |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2014002267A (en) |
| KR (1) | KR20140054286A (en) |
| CN (1) | CN103797386B (en) |
| TW (1) | TW201400292A (en) |
| WO (1) | WO2013191031A1 (en) |
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| CN104165329A (en) * | 2014-08-13 | 2014-11-26 | 福建省锐驰电子科技有限公司 | Reflective sheet capable of conducting plastic absorption |
| CN105093387A (en) * | 2015-07-31 | 2015-11-25 | 深圳市华星光电技术有限公司 | Light guide panel, backlight module group and display device |
| CN106414055A (en) * | 2015-04-03 | 2017-02-15 | 日东电工株式会社 | Foamed resin sheet and electrical/electronic device provided with same |
| CN106842408A (en) * | 2017-03-31 | 2017-06-13 | 京东方科技集团股份有限公司 | Light guide plate, the method and display device that prepare light guide plate |
| CN110920197A (en) * | 2019-11-26 | 2020-03-27 | 宁波勤邦新材料科技有限公司 | Matte optical diffusion film and preparation method thereof |
| US11189397B2 (en) | 2017-06-30 | 2021-11-30 | Furukawa Electric Co., Ltd. | Outer cover body for electrical wires and outer-cover-body-attached wire harness |
| CN114967222A (en) * | 2022-03-28 | 2022-08-30 | 纳晶科技股份有限公司 | Quantum dot optical plate, preparation method thereof and light-emitting device comprising quantum dot optical plate |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013191032A1 (en) * | 2012-06-18 | 2013-12-27 | 古河電気工業株式会社 | Foamed sheet |
| JP7051164B1 (en) | 2021-06-14 | 2022-04-11 | 祐次 廣田 | Self-driving tram |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101031610A (en) * | 2004-09-30 | 2007-09-05 | 王子制纸株式会社 | Process for producing foam |
| CN101156090A (en) * | 2005-04-19 | 2008-04-02 | 积水化成品工业株式会社 | Foamed sheet for reflectors, reflectors, and process for production of the sheet |
| CN101498427A (en) * | 2008-01-29 | 2009-08-05 | 辉意市务有限公司 | Uniform illuminating device |
| JP2012084473A (en) * | 2010-10-14 | 2012-04-26 | Furukawa Electric Co Ltd:The | Reflective base material and backlight unit |
| WO2012073782A1 (en) * | 2010-11-30 | 2012-06-07 | シャープ株式会社 | Display device and television receiver |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1795553A1 (en) * | 2004-09-30 | 2007-06-13 | Oji Paper Co., Ltd. | Process for producing foam |
-
2012
- 2012-06-18 JP JP2012137366A patent/JP2014002267A/en active Pending
-
2013
- 2013-06-11 CN CN201380003025.0A patent/CN103797386B/en active Active
- 2013-06-11 KR KR1020147007163A patent/KR20140054286A/en not_active Application Discontinuation
- 2013-06-11 WO PCT/JP2013/066054 patent/WO2013191031A1/en active Application Filing
- 2013-06-17 TW TW102121325A patent/TW201400292A/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101031610A (en) * | 2004-09-30 | 2007-09-05 | 王子制纸株式会社 | Process for producing foam |
| CN101156090A (en) * | 2005-04-19 | 2008-04-02 | 积水化成品工业株式会社 | Foamed sheet for reflectors, reflectors, and process for production of the sheet |
| CN101498427A (en) * | 2008-01-29 | 2009-08-05 | 辉意市务有限公司 | Uniform illuminating device |
| JP2012084473A (en) * | 2010-10-14 | 2012-04-26 | Furukawa Electric Co Ltd:The | Reflective base material and backlight unit |
| WO2012073782A1 (en) * | 2010-11-30 | 2012-06-07 | シャープ株式会社 | Display device and television receiver |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165329A (en) * | 2014-08-13 | 2014-11-26 | 福建省锐驰电子科技有限公司 | Reflective sheet capable of conducting plastic absorption |
| CN104165329B (en) * | 2014-08-13 | 2016-08-17 | 福建省锐驰电子科技有限公司 | One can plastic uptake reflector plate |
| CN106414055A (en) * | 2015-04-03 | 2017-02-15 | 日东电工株式会社 | Foamed resin sheet and electrical/electronic device provided with same |
| CN105093387A (en) * | 2015-07-31 | 2015-11-25 | 深圳市华星光电技术有限公司 | Light guide panel, backlight module group and display device |
| CN105093387B (en) * | 2015-07-31 | 2018-12-07 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and display device |
| CN106842408A (en) * | 2017-03-31 | 2017-06-13 | 京东方科技集团股份有限公司 | Light guide plate, the method and display device that prepare light guide plate |
| WO2018176821A1 (en) * | 2017-03-31 | 2018-10-04 | 京东方科技集团股份有限公司 | Light guide plate, method for manufacturing light guide plate, and display device |
| US10871605B2 (en) | 2017-03-31 | 2020-12-22 | Boe Technology Group Co., Ltd. | Light guide plate, manufacturing method thereof and display device |
| US11189397B2 (en) | 2017-06-30 | 2021-11-30 | Furukawa Electric Co., Ltd. | Outer cover body for electrical wires and outer-cover-body-attached wire harness |
| CN110920197A (en) * | 2019-11-26 | 2020-03-27 | 宁波勤邦新材料科技有限公司 | Matte optical diffusion film and preparation method thereof |
| CN114967222A (en) * | 2022-03-28 | 2022-08-30 | 纳晶科技股份有限公司 | Quantum dot optical plate, preparation method thereof and light-emitting device comprising quantum dot optical plate |
| CN114967222B (en) * | 2022-03-28 | 2023-12-05 | 纳晶科技股份有限公司 | Quantum dot optical plate, preparation method thereof and light-emitting device comprising quantum dot optical plate |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201400292A (en) | 2014-01-01 |
| WO2013191031A1 (en) | 2013-12-27 |
| CN103797386B (en) | 2016-08-17 |
| JP2014002267A (en) | 2014-01-09 |
| KR20140054286A (en) | 2014-05-08 |
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