The application is that name that application number is 200910178872.6 is called the dividing an application of application for a patent for invention of " polymerisable compound and the blooming that comprises this polymerisable compound ", and the applying date of original application is on October 09th, 2009.
Embodiment
Reach for further setting forth the present invention technique means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, the polymerisable compound that foundation the present invention is proposed and its embodiment of blooming, structure, feature and the effect thereof that comprises this polymerisable compound, be described in detail as follows.
Relevant aforementioned and other technology contents of the present invention, Characteristic can be known and present in the following detailed description coordinated with reference to graphic preferred embodiment.By the explanation of embodiment, when can be to reach technique means and the effect that predetermined purpose takes to obtain one more deeply and concrete understanding to the present invention, yet appended graphic only being to provide with reference to the use with explanation not be used for the present invention is limited.
Term used herein is only for describing described implementation method, not in order to limit the scope of the invention.For example, the term used in specification sheets " ", unless clear and definite explanation is separately arranged in literary composition, term " " is encompasses singular and most form.
In this article, " columnar structure " consisted of two inclined surfaces, described inclined surface is plane or curved surface, and described two inclined surfaces form peak or arc in the prism roof intersection, and can be separately with another inclined surface of adjacent columnar structure, intersects in bottom and form paddy.
Particularly, the invention provides a kind of polymerisable compound, comprise:
(a) formula of 1 % by weight to 90 % by weight (I) monomer:
Wherein,
X
1for H or methyl; X
2for H or C
1-C
2alkyl;
X is O or S; R
1for C
1-C
12the alkylene of straight or branched or inferior-oxyl; And
D and n are independently of one another for being selected from 0 to 3 integer; With
(b) light trigger of 0.1 % by weight to 10 % by weight,
Gross weight meter based on polymerisable compound.
Generally speaking, sulphur atom is because polarizability is higher, so specific refractory power is higher, and preferably, in formula (I) monomer, X is S, X
2for H, and d is integer 1.According to a specific embodiment of the present invention, described formula (I) monomer is tool formula (I
1) monomer:
Wherein, R
1be preferably methylene radical, ethylidene, propylidene or isopropylidene; N is selected from 1 to 2 integer; X
1for H or methyl.
In better specific embodiment, be the R in use formula (I) monomer
1for ethylidene; N is 1; X
1for H, that is, be following formula (I
2) monomer
Above-mentioned formula (I) monomer has the high refractive index between 1.57~1.63, therefore can effectively increase the specific refractory power that described polymerisable compound solidifies rear gained coating.Generally speaking, for making polymerisable compound, have high refractive index, the consumption of formula (I) monomer, in the gross weight of described polymerisable compound, be at least 1 % by weight, is preferably 8 % by weight to 70 % by weight, is more preferred from 30 % by weight to 60 % by weight.If the content of above-mentioned formula (I) monomer is lower than 1 % by weight, polymerisable compound is difficult to have high refractive index, if surpass 90 % by weight, can cause polymerisable compound to solidify not exclusively, is unfavorable for coating.
Can be used for the light trigger (composition (b)) in polymerisable compound of the present invention, can produce free radical after rayed, and the transmission by free radical and the compound of initiated polymerization, it for example can be selected from following group: benzophenone (benzophenone), st-yrax (benzoin), benzil (benz il), 2, 2-dimethoxy-1, 2-phenylbenzene second-1-ketone (2, 2-dimethoxy-1, 2-diphenylethan-1-one), 1-hydroxycyclohexylphenylketone (1-hydroxy cyclohexyl phenyl ketone), 2, 4, 6-Three methyl Benzene first anilide diphenyl phosphine oxide (2, 4, 6-tr imethylbenzoyl diphenyl phosphine oxide, TPO) and combination, benzophenone preferably.
Light trigger consumption of the present invention there is no particular restriction, and kind and the consumption thereof of the polymerisable monomer that can comprise according to described polymerisable compound are adjusted.Generally speaking, in the gross weight of described polymerisable compound, be 0.1 % by weight to 10 % by weight, be preferably 1 % by weight to 5 % by weight.
For increasing the reactivity of polymerisable compound, and after it solidifies, there is good thermotolerance, and can maintain high refractive index, the present composition optionally adds (c) other monomer, and, for maintaining polymerisable compound high refractive index characteristic of the present invention, (c) specific refractory power of other monomer be take and is not less than 1.6 as good, for example formula (II) monomer
Wherein,
X
3and X
4to be H or C independently of one another
1-C
4alkyl is preferably H or methyl independently of one another;
Y
1, Y
2, Y
3and Y
4to be H, C independently of one another
1-C
4alkyl or OH are preferably H or methyl independently of one another; And
A and b are independently of one another for being selected from 0 to 5 integer, preferably independently of one another for being selected from 1 to 3 integer
Preferably, in formula (II) monomer, X
3, X
4, Y
1, Y
2, Y
3and Y
4be independently of one another for H or methyl, and a and b are independently of one another for being selected from 1 to 3 integer.
According to a specific embodiment of the present invention, described formula (II) monomer is concrete formula (II
1) monomer:
If, while adding, the consumption of other monomer of composition (c), in the gross weight of described polymerisable compound, be preferably 1 % by weight to 50 % by weight, is more preferred from 5 % by weight to 40 % by weight, the best is 15 % by weight to 30 % by weight.Generally speaking, when the consumption of formula (II) monomer is less than 1 % by weight, polymerisable compound can't reach thermostability; When the consumption of formula (II) monomer is greater than 50 % by weight, the polymerisable compound viscosity of gained is too large, is unfavorable for coating.
General polymerisable compound all can add some multiple functional radical monomers or oligopolymer as linking agent (Crosslinking agent), to increase molecule and intermolecular degree of crosslinking when the polymerization, makes composition be easy to solidify, and can promote and solidify the hardness of coating afterwards.Polymerisable compound of the present invention optionally adds (d) linking agent, to promote the film-forming properties of polymerisable compound of the present invention.According to of the present invention one preferred implementation method, add oligopolymer in polymerisable compound of the present invention as linking agent, solidify rear formed coating hardness to increase molecule and intermolecular degree of crosslinking and to increase described polymerisable compound, make coating hardness reach the pendulum hardness (pendulum hardness) more than 50 or 50, but when pendulum hardness is greater than 80, easily embrittlement, therefore preferred pendulum hardness is 50 to 80.The kind of above-mentioned linking agent is that to have in the technical field of the invention a technician of common knowledge known, such as but not limited to acrylate, the aforesaid propylene acid esters can have one or more functional group, preferably there is multiple functional radical, can be used for acrylate in the present invention such as but not limited to (methyl) acrylate, as tripropylene glycol two (methyl) acrylate (tripropylene glycol di(meth) acrylate), 1, 4-butyleneglycol two (methyl) acrylate (1, 4-butanediol di(meth) acrylate), 1, 6-hexylene glycol two (methyl) acrylate (1, 6-hexanediol di(meth) acrylate), polyoxyethylene glycol two (methyl) acrylate (polyethyleneglycol di (meth) acrylate), allylation two (methyl) cyclohexyl acrylate (allylated cyclohexyl di (meth) acrylate), isocyanuric acid ester two (methyl) acrylate (i socyanurate di(meth) acrylate), ethoxylation trishydroxymethyl the third hydrocarbon three (methyl) acrylate (ethoxylated trimethylol propane tri (meth) acrylate), propoxylated glycerol three (methyl) acrylate (propoxylated glycerol tri (meth) acrylate), trishydroxymethyl the third hydrocarbon three (methyl) acrylate (tr imethylol propane tri (meth) acrylate), three (propylene vinegar oxygen ethyl) cyamelide (tris (acryloxyethyl) isocyanurate), urethane acrylate (urethane acrylate), as aliphatic carbamate acrylate (aliphatic urethane acrylate) or aromatic amino ester formate acrylate (aromatic urethane acrylate), polyester acrylate (polyester acrylate), as polyester diacrylate (polyester diacrylate), epoxy acrylate (epoxy acrylate), as bisphenol-A epoxy diacrylate (bisphenol-A epoxy diacrylate), Epoxy Phenolic Acrylates (novolac epoxy acrylate), or its mixture.Be preferably urethane acrylate or epoxy acrylate or its mixture.
The commercial acrylate oligopolymer example that can be used for composition of the present invention (d) comprises:
The excellent happiness of (methyl) origoester acrylate: EBECRYL-745(green (UCB) limited-liability company system); The two key chemical industry of DOUBLEMER3778, DOUBLEMER1701, DOUBLEMER345, DOUBLEMER1703, DOUBLEMER530, DOUBLEMER570, DOUBLEMER236 and DOUBLEMER584(company limited system); 6530B-40,6531B-40,6532B-40 and 6533B-40(Changxing chemical industry system).
Aliphatic poly urethane acrylate oligomer: 6101-100, 611A-85, 611B-85, 6112-100, 6113, 6114, 6115J-80, 6130B-80, 6131-1, 6134B-80, 6141H-80, 6143A-80, 6143C-60, 6144-100, 6145-100, 6145-100H, 6148J-75, 6148T-85, 6149-100, 615-100, 6150-100, 6151, 6152B-80, 6154B-80, 6157B-80, 6158B-80, 6160B-70, 6161-100, 6181 and 6196-100 (Changxing (Eternal) chemical industry system), AgiSyn
tM230T1 and AgiSyn
tM230A2 (Xin Limei science and technology (thigh) company system), the excellent happiness of EBECRYL-264, EBECRYL-4820, EBECRYL-270, EBECRYL-230, EBECRYL-284 and EBECRYL-1290(green (UCB) limited-liability company system), peaceful (COGNIS) company of HENKEL6010(section system), CN9001, CN9002, CN9004 and CN9006 (Sartomer (Sartomer) company system),
u100,
vP LS2265,
vP LS2308,
u375H,
vP LS2220,
xP2491,
xP2513,
u200 reaches
xP2609 (Bayer (Bayer) company system).
Aromatic series polyurethane(s) origoester acrylate: 6120F-80,6121F-80,6122F-80 and 6146-100(Changxing chemical industry system); 670T1, AgiSyn
tM670A2 (Xin Limei science and technology (thigh) company system); The excellent happiness of EBECRYL-204, EBECRYL-205, EBECRYL-210, EBECRYL-215, EBECRYL-220 and EBECRYL-6202(green (UCB) limited-liability company system).
Polyester acrylic ester oligomer: EBECRYL-830 and EBECRYL-524 (excellent happiness green (UCB) limited-liability company system); 6315,6320,6323-100,6325-100,6327-100,6336-100 and 6361-100(Changxing chemical industry system).
Epoxy acrylate oligomer: Agi Syn
tM1010, AgiSyn
tM1010A80, AgiSyn
tM1010B80, Agi Syn
tM1010C80(Xin Limei science and technology (thigh) company system); 621,622,623-100,6210G, 624-100,6231,6241,6213-100,6215-100,625,6261 and 620-100 (Changxing chemical industry system); The excellent happiness of EBECRYL-600, EBECRYL-605, EBECRYL-648, EBECRYL-1608, EBECRYL-3105, EBECRYL-3416, EBECRYL-3700, EBECRYL-3701, EBECRYL-3703, EBECRYL-3708 and EBECRYL-6040(green (UCB) limited-liability company system).
If, while adding, the consumption of composition (d) linking agent, in the gross weight of described polymerisable compound, can be 1 % by weight to 60 % by weight, is preferably 10 % by weight to 50 % by weight, is more preferred from 20 % by weight to 45 % by weight.
In addition, the present composition, except above-mentioned possible composition, optionally adds any known additive, to change its physics or chemical property.Can be used for additive of the present invention and generally can be selected from following group: thinner, mineral filler, static inhibitor, lubrication prescription (slip agent), tensio-active agent, flow agent (leveling agents), defoamer and combination thereof.
The viscosity of polymerisable compound is to change with factors such as ingredient, content, service temperatures in described composition.According to the present invention, optionally in described polymerisable compound, add thinner, to adjust the viscosity of polymerisable compound, above-mentioned thinner is preferably acrylic ester monomer, applicable thinner for example, but be not limited to be selected from following group: (methyl) acrylate, 2-phenoxyethyl acrylate (2-phenoxyl ethyl acrylate), the 2-(2-ethoxy ethoxy) ethyl propylene acid esters (2-(2-ethoxyethoxy) ethyl acrylate), trishydroxymethyl the third hydrocarbon triacrylate (trimethylolpropane triacrylate), polyethyleneglycol diacrylate (polyethylene glycol diacrylate), the o-phenyl ether of polyoxyethylene glycol acrylate (Polyethylene glycol o-phenylphenyl ether acrylate), cumyl phenoxyethyl acrylate (cumyl phenoxyl ethyl acrylate), vinylformic acid xenyl epoxy ethyl ester (biphenylepoxyethyl acrylate), bisphenol-A epoxy diacrylate (bisphenol-Aepoxy diacrylate), Epoxy Phenolic Acrylates (novolac epoxy acrylate) the third oxidation neopentylglycol diacrylate (propoxylated neopentyl glycol diacrylate), ethoxyquin trishydroxymethyl the third hydrocarbon triacrylate (ethoxylated trimethylolpropane triacrylate), third oxidation trishydroxymethyl the third hydrocarbon triacrylate (propoxylated trimethyloipropane triacrylate), two new penta tetrol six acrylate (dipentaerythritol hexaacrylate DPHA) and these combinations.The example of commercially available this type of monomer comprises: by Sartomer (Sartomer) company, produced, commodity are by name
or
the person; By Changxing (Eternal) company, produced, commodity are by name
the person.
Solidify the hardness of rear formed coating for promoting composition, optionally in composition, add mineral filler, to avoid affecting optical property because of the concentration structure collapse phenomenon.In addition, mineral filler also has the effect of the briliancy that promotes panel of LCD.Can be used in mineral filler of the present invention and be that to have in the technical field of the invention a technician of common knowledge known, it is preferably titanium dioxide, zirconium white, silicon-dioxide, zinc oxide or its mixture such as but not limited to zinc oxide, silicon-dioxide, strontium titanate, zirconium white, aluminum oxide, calcium carbonate, titanium dioxide, calcium sulfate, barium sulfate or its mixture.Above-mentioned mineral filler has approximately 10 nanometers to the about size of 350 nanometers, is preferably 50 nanometer to 150 nanometers.
The optional static inhibitor that adds, in polymerisable compound, makes it have anlistatig effect, and then improves the operation yield.Can be used in static inhibitor of the present invention and be the technician who has in the technical field of the invention common knowledge known, it is such as but not limited to oxyethyl group glycerol fatty acid ester class, quaternary ammonium compound, fatty amines derivative, epoxy resin (as poly-epoxy second hydrocarbon), silica hydrocarbon (siloxane) or other alcohol derivatives (as PVOH ester or polyglycol ether) etc.
Polymerisable compound of the present invention for example can be coated on, on a substrate or an otpical leaf (Optical thin sheet) (any known diffusion barrier or condensing film), be used to form the coating of a blooming, described coating has concentration structure, can increase surface abrasion resistance (wear resistance) and superior slickness (smoothness) is provided; And because polymerisable compound of the present invention comprises formula (I) monomer with high refractive index, therefore can make formed coating there is high refractive index.The specific refractory power of coating of the present invention is at least 1.53, is preferably 1.57 to 1.63, effectively the briliancy of improving optical thin slice.
The material of aforesaid substrate can be any the technical field of the invention, and to have a technician of common knowledge known, for example glass or plastics.Above-mentioned plastic base can be consisted of one or more polymer resins layers.Kind in order to the resin that forms above-mentioned polymer resins layers there is no particular restriction, it for example is selected from following group: vibrin (polyester resin), as polyethylene terephthalate (polyethylene terephthalate, PET) or Polyethylene Naphthalate (polyethylene napht halate, PEN), polyacrylate resin (polyacrylate resin), as polymethylmethacrylate (polymethyl methacrylate, PMMA), polyolefin resin (polyolefin resin), as polyethylene (PE) or polypropylene (PP), poly-cyclic olefin resins (polycycloolefin resin), polyimide resin (polyimide resin), polycarbonate resin (polycarbonate resin), polyurethane resin (polyurethane resin), cellulosetri-acetate (triacetyl cellulose, TAC), poly(lactic acid) (Polylactic acid) and combination thereof, but not as limit.Wherein, preferably be selected from vibrin, polycarbonate resin and combination thereof; It is more preferably polyethylene terephthalate.The thickness of substrate usually depend on the demand of the optical articles wanting to make, be generally 30 microns to 300 microns.
The present invention provides a kind of blooming in addition, its comprise a substrate and at least one deck by the formed coating of above-mentioned polymerisable compound.Blooming of the present invention can be used in the backlight module of indicating meter as brightness enhancement film (brightness enhancement film).
Fig. 1 is the schematic diagram of an implementation method of blooming of the present invention.As shown in Figure 1, blooming of the present invention comprises the coating 2 that a substrate 1 and is concentration structure.
The coat-thickness of blooming of the present invention, be generally 1 micron to 100 microns, is preferably 10 microns to 40 microns, and the best is 15 microns to 25 microns.When coating has the form of ad hoc structure, coat-thickness is the vertex calculating with its structure.The blooming of Fig. 1 of take is example, and the thickness of coating 2 is as shown in symbol a.
According to an implementation method of the present invention, described coating has concentration structure.The concentration structure of blooming of the present invention is known for the technician who has in the technical field of the invention common knowledge, its such as but not limited to: regular or irregular prism columnar structure is (, the triangle column), the arc columnar structure (, the peak of columnar structure is arc form), lentoid and capsule shape structure or its combination etc., be preferably prism columnar structure or arc columnar structure or its combination.Above-mentioned prism columnar structure and/or arc columnar structure can be linearity (linear), broken-line type (zigzag) or shaped form (serpentine), are preferably the linear prism columnar structure.And two adjacent columnar structures can be parallel or not parallel.For reducing the optical interference phenomenon, concentration structure layer of the present invention can comprise at least plural uneven columnar structure each other, and above-mentioned columnar structure can be prism columnar structure or arc columnar structure or its combination, is preferably the prism columnar structure.According to the present invention, described concentration structure layer comprises at least one group of uneven two prism columnar structures that intersected and/or at least one group of uneven two prism columnar structures that do not intersect.
Blooming of the present invention can anyly have in the technical field of the invention the known mode of technician of common knowledge and manufacture.For example, can be via the method manufacture that comprises following steps:
(1) mix the monomer, light trigger of tool formula (I) and monomer, linking agent and other additive of optional tool formula (II), to form a colloidal state polymerisable compound;
(2) the colloidal state polymerisable compound of step (1) gained is coated on a substrate by rights, formed a coating, recycle for example roller embossing and form a concentration structure on coating; And
(3) solidify above-mentioned coating, this can, for example under normal temperature or heating, reach its irradiation energy ray.
Optionally, can repeat above steps, the blooming that comprises a plurality of coatings with acquisition.
For avoiding the substrate surface scratch to affect the optical property of diaphragm, optionally substrate with respect to another surface by the formed coating of polymerisable compound of the present invention on forms one anti-scratch layer.Above-mentioned anti-scratch layer can be level and smooth shape or non-level and smooth shape.The thickness of above-mentioned anti-scratch layer is preferably between the 0.5-30 micron, according to the JISK7136 standard method, measures, and gained mist degree (Haze) is 1%-90%, is preferably 5%-40%.According to the JISK7136 standard method, measure the total light transmittance (Total Light Transmittance) of blooming of the present invention, blooming of the present invention has the total light transmittance that is not less than 60%, is preferably higher than 80%, is more preferred from more than 90% or 90%.
Polymerisable compound of the present invention has at least 1.53 high refractive index, so there is high refractive index by the prepared blooming of polymerisable compound of the present invention, this blooming can be used in the backlight module of indicating meter as brightness enhancement film, so that good optical gain values to be provided; And, because of not halogen-containing in coating, do not pollute the environment, therefore can effectively solve the existing problem of prior art.In addition, polymerisable compound levelling property of the present invention is good, and cost hangs down and possesses advantage economically.
Following examples will be for the invention provides further instruction.
Embodiment 1-6
According to the blooming of mode Preparation Example 1 to 6 described below, the combination of each Example formulations is as listed as table 1.
At first, the part by weight that each component is listed with table 1 mixes, then, at the temperature of 50 ℃, with rotating speed 1,000rpm stirs, and forms a colloidal state polymerisable compound.
This colloidal state polymerisable compound is coated to (model on polyphenyl dioctyl phthalate second diester (PET) substrate
east beautiful (TORAY) company produces), to form coating, then utilize roller embossing mode to form a prism decorative pattern on coating.Then, at normal temperatures, with energy-ray, irradiate described coating, it is solidified.Obtain having the blooming of the coating that thickness is 25 microns.
Table 1
(a): formula (I) monomer (Sigma's aldrich (Sigma-Aldrich) company produces, 2-(naphthyl-7-sulfo-) ethyl propenoate (2-(naphthalen-7-ylthio) ethyl acrylate))
(b): light trigger (vapour Bagong department produces,
)
(d): linking agent (Changxing company produces,
)
The blooming of the various embodiments described above is carried out to specific refractory power test (the automatic refractometer (AUTOMATIC REFRACTOMETER) that uses index instrument (Index Instruments) company to provide
instrument), and each described blooming is applied to 22 inches side type backlight modules that company of Benq (BenQ) provides, (employing is opened up Pu Kang (TOPCON) company and is provided to carry out the test of luminance gain degree
instrument), acquired results is as shown in table 2.
Table 2
Embodiment |
Specific refractory power |
The luminance gain degree |
1 |
1.550 |
68.5% |
2 |
1.553 |
69.8% |
3 |
1.561 |
71.1% |
4 |
1.566 |
72.6% |
5 |
1.571 |
73.0% |
6 |
1.575 |
73.8% |
Result by embodiment in table 21 to 6 is known, and the specific refractory power of the formed coating of polymerisable compound of the present invention is all higher than 1.55, and the coating specific refractory power is higher, and while being applied to backlight module, its luminance gain degree is higher, and preferred spotlight effect can be provided.
Embodiment 7-10
Repeat the preparation method of the blooming of embodiment 1 to 6.
The combination of embodiment 7-10 formula is as listed as table 3.
Table 3
(a): formula (I) monomer (Aldrich produces)
(b): light trigger (vapour Bagong department produces,
)
(c): (Xin Zhong village company produces other monomer, A-BPEF)
(d): linking agent (Changxing company produces,
)
The blooming of above-described embodiment 6-10 is carried out to heat stability test (using thermal gravimetric analyzer Shimadzu TGA-50H), the thermostability of the blooming of the embodiment 6-10 obtained, acquired results is as shown in table 4.
Table 4
Embodiment 6 samples |
Temperature (℃) |
315.0 |
? |
Weightless (%) |
-5 |
Embodiment 7 samples |
Temperature (℃) |
323.3 |
? |
Weightless (%) |
-5 |
Embodiment 8 samples |
Temperature (℃) |
332.1 |
? |
Weightless (%) |
-5 |
Embodiment 9 samples |
Temperature (℃) |
342.3 |
? |
Weightless (%) |
-5 |
Embodiment 10 samples |
Temperature (℃) |
354.6 |
? |
Weightless (%) |
-5 |
The listed result from table 4, polymerisable compound of the present invention adds (c) other monomer, and after its film-forming, cured film has thermostability preferably.
Comparative example 1-2
Formula (I) monomer is replaced as to (a ') monomer or (a ") monomer, repeats the preparation method of the blooming of embodiment 1, the combination of comparative example 1-2 formula is as listed as table 5
Table 5
(a '): (Changxing company produces monomer, EM210)
(a ' '): (Changxing company produces monomer, EM2108)
(b): light trigger (vapour Bagong department produces,
)
(d): linking agent (Changxing company produces,
)
The blooming of above-mentioned each comparative example is carried out to specific refractory power test (the AUTOMATIC REFRACTOMETER that uses Index Instruments company to provide
instrument), and each described blooming is applied to 22 inches side type backlight modules that BenQ company provides, carries out the test of luminance gain degree and (adopt TOPCON company to provide
instrument), acquired results is as shown in table 6.
Table 6
Comparative example |
Specific refractory power |
The luminance gain degree |
1 |
1.529 |
63.4% |
2 |
1.533 |
64.8% |
Known according to the result of table 6, be compared to the composition of embodiment 1, the composition of comparative example 1 or comparative example 2, because of not containing formula (I) monomer, so specific refractory power is lower, the luminance gain effect is poor.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.