CN102902001A - Small glass globe type retroreflection sheet - Google Patents
Small glass globe type retroreflection sheet Download PDFInfo
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- CN102902001A CN102902001A CN2012103426295A CN201210342629A CN102902001A CN 102902001 A CN102902001 A CN 102902001A CN 2012103426295 A CN2012103426295 A CN 2012103426295A CN 201210342629 A CN201210342629 A CN 201210342629A CN 102902001 A CN102902001 A CN 102902001A
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Abstract
The invention discloses a small glass globe type retroreflection sheet. Retroreflection sheets in prior art are poor in color rendering, and the retroreflection sheet sequentially comprises a surface protection layer, a printing layer, a clamping layer, a focus point forming layer, a specular layer, an adhesive layer and protection paper from an incidence direction of light; and a glass globe is arranged between the clamping layer and the focus point forming layer, a coloring layer is arranged at the position between the clamping layer and the focus point forming layer, and the position is free of the glass globe. According to the small glass globe type retroreflection sheet, the color rendering performance is good, the coloring layer can be deformed by moving powder bodies, unity is kept, and simultaneously, excellent flexibility is achieved.
Description
Technical field
The present invention relates to a kind of retroreflection sheet, relate in particular to a kind of tiny glass ball type retroreflection sheet.
Background technology
Retroreflection sheet is widely used in traffic mark because having excellent night visibility, vehicle license, authenticating tag, or the identification of reflex reflection type RFID(electric wave) labeling.As this type of retroreflection sheet, the retroreflection sheet of the color such as known have a tiny glass ball type retroreflection sheet, is with in addition adularescent, red.
27-34488 number (patent documentation 1) central record relevant for this type of tiny glass ball type retroreflection sheet of Japanese Laid-Open Patent communique.The retroreflection sheet that this patent documentation is put down in writing accompanies many small glass beads in the middle of holding sheet and focus formation layer.According to record, holding sheet is formed by the resin that is colored.That is, the light that is positioned at glass bead goes out light incident side, and covers all holding sheets of a plurality of glass beads and be colored.In this case, holding sheet is colored having under the state of light transmission.This type of holding sheet uses the resin that contains the pigment class colorant usually.
The retroreflection sheet that Japanese Laid-Open Patent communique 27-256433 number (patent documentation 2) is put down in writing is the same with the retroreflection sheet that patent documentation 1 is put down in writing, and forms between the layer in holding sheet and focus and accompanies a plurality of tiny glass balls.But the holding sheet that the holding sheet between the glass bead and focus form layer institute contact portion is colored.That is, holding sheet is positioned at the opposite side that the holding sheet focus forms layer side, and forms between a plurality of glass beads of layer side at the transparent holding sheet that covers a plurality of glass beads and holding sheet focus, and forms dual structure with the holding sheet that is colored.This painted holding sheet can be light transmitting property, also can be light tight character.When painted holding sheet was light transmitting property, the holding sheet of putting down in writing with above-mentioned patent documentation 1 was the same, used the resin that contains the dye class colorant in the holding sheet that is colored.And the holding sheet that is colored is when being light tight character, adopts the resin of the pigment class colorant that the coccoid by light tight character consists of.
But, because the holding sheet of clamping a plurality of glass beads in the middle of the retroreflection sheet that above-mentioned patent documentation 1 is put down in writing is to be made of the pigmentary resin with light transmitting property, so colour rendering is relatively poor sometimes.And the retroreflection sheet that patent documentation 2 is put down in writing, if the holding sheet that is colored is light tight character, colour rendering can be relatively good, even but such retroreflection sheet also faces more excellent colour developing requirement.
Summary of the invention
The present invention is directed to the prior art deficiency, a kind of tiny glass ball type retroreflection sheet is provided.
Tiny glass ball type retroreflection sheet of the present invention comprises successively that along the incident direction of light sealer, holding sheet, focus form layer, specular layer, adhesive phase, protection sheet; Holding sheet and focus form between the layer and are provided with dyed layer, dyed layer is embedded with glass bead, the top of described glass bead is positioned at holding sheet, the bottom is positioned at focus and forms layer, dyed layer is positioned at below the center of glass bead, form layer one side near focus, the thickness of dyed layer is 1～10% of glass bead diameter; The particle diameter of described glass bead is 10～150 μ m, and filling rate is 60～90%, and during the full glass bead of dyed layer embedding, filling rate is 100%, and wherein each hemispherical groove of specular layer is corresponding with a glass bead.
Be provided with printed layers between described sealer and the holding sheet, the coloured material of described printed layers is ink.
The mean grain size of described glass bead is 20～100 μ m, and filling rate is 70～85%.
The material of described dyed layer is organic pigment or the inorganic pigment of powdery; Described organic pigment is AZO pigments or phthalocyanine color; Described inorganic pigment is the pigment that utilizes the pigment of metal oxide or utilize ferric ferrocyanide, described pigment is a kind of of alkaline soil aluminic acid class, metal sulphide class, silicon class luminescence-utraviolet colorant, or alkaline soil aluminic acid class, the light-accumulated luminous colorant of metal sulphide class is a kind of, and dyed layer can be out of shape by mobile coccoid.
Described specular layer is the metal level that the evaporation mode forms.
The material of described adhesive phase is alkaline adhesive.
Described protection sheet is that paper is done lamination treatment with polyvinyl resin, and wherein one side is made with the processing of the processes such as silicone stripping shape again.
Described sealer, holding sheet, the cambial material of focus comprise the smooth resins in film form with light transmitting property; Wherein resins in film form is one or more of acryl resin, alkyd resin, fluororesin, vestolit, polyester, urethane resin, polycarbonate;
Also comprise adjuvant in the material of sealer, described adjuvant is one or more of ultraviolet light absorber, stabilization agent, plasticizer, bridging agent.
Described sealer, holding sheet, focus formation layer are water white transparency or colored transparent, and during colored transparent, its color and dyed layer are identical or different, with the colorant dyeing of pigment class or dye class;
Yellow colorants is that isoindolone system, isoindoline system, quinophthalone system, anthraquinone system, pyrazolone system, flavanthrone system, benzimidazolone system or azo nickel are colorant in the colorant of described pigment class or dye class; Red stain is that anthraquinone system, perylene system, quinoline Azone system or indigoid are colorant; Blue colorant is that phthalocyanine system, father-in-law's reduction stain are, anthraquinone is, cobalt is colorant; Green colourant is that phthalocyanine system, emerald green system, chromium oxide system, cadmium are colorant; Dark brown colorant be monochrome colcother is arranged is colorant, may be used isoindolone is that yellow colorants, perylene are that red stain or phthalocyanine are blue colorant; Orange colorant is that monochrome has anthraquinone system, pyrazolone system, purple cyclic ketones system, perylene to be or the quinoline Azone is colorant, and may be used isoindolone is that yellow colorants or perylene are red stain; White color agents is that phthalein system, zinc system or lead are colorant; Black colorant be carbon black system, nigrosine system, the black system of perylene or titanium black be colorant.
Beneficial effect: tiny glass ball type retroreflection sheet color developing provided by the invention is good, and dyed layer can be out of shape by mobile coccoid, can have excellent pliability when keeping integraty.
Description of drawings
Fig. 1 is the structural representation of tiny glass ball type retroreflection sheet.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, tiny glass ball type retroreflection sheet of the present invention comprises successively that along the incident direction of light sealer 1, holding sheet 3, focus form layer 6, specular layer 7, adhesive phase 8, protection sheet 9; Holding sheet 3 and focus form between the layer 6 and are provided with dyed layer 4, dyed layer 4 is embedded with glass bead 5, the top of described glass bead 5 is positioned at holding sheet 3, the bottom is positioned at focus and forms layer 6, dyed layer 4 is positioned at below the center of glass bead 5, form layer 6 one side near focus, the thickness of dyed layer 4 is 1～10% of glass bead 5 diameters; The particle diameter of described glass bead 5 is 10～150 μ m, and filling rate is 60～90%, and during the full glass bead of dyed layer 4 embeddings, filling rate is 100%, and wherein each hemispherical groove of specular layer 7 is corresponding with a glass bead 5.
Be provided with printed layers 2 between described sealer 1 and the holding sheet 3, the coloured material of described printed layers 2 is ink.
The mean grain size of described glass bead 5 is 20～100 μ m, and filling rate is 70～85%.
The material of described dyed layer 4 is organic pigment or the inorganic pigment of powdery; Described organic pigment is AZO pigments or phthalocyanine color; Described inorganic pigment is the pigment that utilizes the pigment of metal oxide or utilize ferric ferrocyanide, described pigment is a kind of of alkaline soil aluminic acid class, metal sulphide class, silicon class luminescence-utraviolet colorant, or alkaline soil aluminic acid class, the light-accumulated luminous colorant of metal sulphide class is a kind of, and dyed layer 4 can be out of shape by mobile coccoid.
The metal level that described specular layer 7 forms for the evaporation mode.
The material of described adhesive phase 8 is alkaline adhesive.
Described protection sheet 9 is that paper is done lamination treatment with polyvinyl resin, and wherein one side is made through the processing of stripping shape with silicone again.
The material that described sealer 1, holding sheet 3, focus form layer 6 comprises the smooth resins in film form with light transmitting property; Wherein resins in film form is one or more of acryl resin, alkyd resin, fluororesin, vestolit, polyester, urethane resin, polycarbonate;
Also comprise adjuvant in the material of sealer 1, described adjuvant is one or more of ultraviolet light absorber, stabilization agent, plasticizer, bridging agent.
Described sealer 1, holding sheet 3, focus formation layer 6 are water white transparency or colored transparent, and during colored transparent, its color and dyed layer are identical or different, with the colorant dyeing of pigment class or dye class;
Yellow colorants is that isoindolone system, isoindoline system, quinophthalone system, anthraquinone system, pyrazolone system, flavanthrone system, benzimidazolone system or azo nickel are colorant in the colorant of described pigment class or dye class; Red stain is that anthraquinone system, perylene system, quinoline Azone system or indigoid are colorant; Blue colorant is that phthalocyanine system, father-in-law's reduction stain are, anthraquinone is, cobalt is colorant; Green colourant is that phthalocyanine system, emerald green system, chromium oxide system, cadmium are colorant; Dark brown colorant be monochrome colcother is arranged is colorant, may be used isoindolone is that yellow colorants, perylene are that red stain or phthalocyanine are blue colorant; Orange colorant is that monochrome has anthraquinone system, pyrazolone system, purple cyclic ketones system, perylene to be or the quinoline Azone is colorant, and may be used isoindolone is that yellow colorants or perylene are red stain; White color agents is that phthalein system, zinc system or lead are colorant; Black colorant be carbon black system, nigrosine system, the black system of perylene or titanium black be colorant.
-shown in Fig. 1, by tiny glass ball type retroreflection sheet, light is during from sealer 1 side incident; arrive the light L of glass bead 4 after glass bead 4 refractions; in specular layer 7 reflections, and then once in glass bead 4 refractions, and from sealer 1 side outgoing.At this moment light L will be to being close to identical direction outgoing with incident direction.Light L carries out reflex reflection by this way.This reflex reflection light L is not because in dyed layer 5 reflections, so not affected by the color of dyed layer 5.And incide tiny glass ball type retroreflection sheet with light L from same direction, and the light L ' of arrival dyed layer 5 is in dyed layer 5 reflections.The light of this reflection only comprises the light in dyed layer 5 reflection wavelength band territories among the light L '.Because dyed layer 5 is coccoid, light L ' carries out diffuse reflection on the surface of dyed layer 5, and its diffusing light is from sealer 1 outgoing.So the central light that reflects to light L ' incident direction of light light L ' seldom.
Night to tiny glass ball type retroreflection sheet irradiation during without the light of colored lights, get back to that major part is reflex reflection light in the reflection ray of light, be only a few through the light of getting back to light after dyed layer 5 reflections.So the reflection ray of getting back to light is subjected to the impact of dyed layer 5 hardly.As long as sealer 1, holding sheet 3, any one in the middle of the focus formation layer 6 do not have painted, then are almost colourless light.
Tiny glass ball type retroreflection sheet will have by day from the light of various different directions incidents.Therefore, when observing tiny glass ball type retroreflection sheet daytime, the observer can be subject to more light from dyed layer 5 reflections.The light of specular layer 7 reflection is the light in the reflection wavelength band territory of dyed layer 5.So, as long as sealer 1, holding sheet 3, any one in the middle of the focus formation layer 6 do not have painted, and the observer can be considered as the color of tiny glass ball type retroreflection sheet the color of dyed layer 5.
Because be not unfavorable for the resin that develops the color in the middle of the dyed layer 5, and only be made of coccoid, so compared by the situation that resin consists of with dyed layer 5, the colour rendering of tiny glass ball type retroreflection sheet of the present invention is more excellent.Therefore, observing the tiny glass ball type retroreflection sheet that the personnel of retroreflection sheet see daytime is the darker retroreflection sheet of color.
In addition, tiny glass ball type retroreflection sheet of the present invention only is made of coccoid because of dyed layer 5, and not resinous in the middle of the dyed layer 5, so the position of the coccoid in the middle of the dyed layer 5 easily changes.Therefore, dyed layer 5 self can Free Transform.On the other hand, fix by tiny glass ball 4 because holding sheet 3 and focus form layer 6, interfix by tiny glass ball 4 so holding sheet 3 and focus form layers 6.Because the dyed layer 5 between holding sheet 3 and focus formation layer 6 can be out of shape, simultaneously holding sheet 3 and focus formation layer 6 interfixes, so tiny glass ball type retroreflection sheet of the present invention can when keeping integraty, have good pliability as a thin slice integral body.
The manufacturing process of tiny glass ball type retroreflection sheet:
At first on the one side of sealer 1, print as required printed layers 2.Then (with the one side of joining of printed layers 2) smears the holding sheet 3 of semi-harden state on the one side of sealer 1.Secondly, put a plurality of glass beads 4 at holding sheet 3.Thus, the part of glass bead 4 will enter in the holding sheet 3 by surface tension effects.The degree that these glass beads 4 enter in the holding sheet 3 can be adjusted by the hardening state of regulating holding sheet 3.Holding sheet 3 is hardened fully, when being clipped in glass bead 4 in the holding sheet 3, holding sheet 3 is fixed on the sealer 1.Next step spreads the lower coccoid that becomes dyed layer 5 at the holding sheet 3 of clamping glass bead 4.At this moment coccoid not only can drop on the holding sheet 3, also can drop on the tiny glass ball 4.At this moment can take gently coccoid with bristle etc., also can be on coccoid rolling viscosity ratio holding sheet 3 clamp the little Dust adhering roller with small viscosity of strength of tiny glass ball.Because glass bead 4 is exposed at outside the holding sheet 3, have the Dust adhering roller of small viscosity by rolling, can only be adsorbed onto the coccoid on the glass bead 4 on the Dust adhering roller, and only between glass bead 4, stay coccoid.Next is put focus and forms layer 6, lays out specular layer 7 again.Afterwards, coated with adhesive layer 8 is attached to protection sheet 9 on the adhesive phase 8 again.
More than describe the present invention, but the present invention is not limited to above-mentioned embodiment, can the appropriate change mode.
Industrial utilizability
Can provide the retroreflection sheet of the tiny glass ball type with excellent colour rendering by the present invention, can apply to traffic mark, engineering sign, commercial mark, vehicle license, reflex reflection formula labeling, the identification of reflex reflection formula RFID(electric wave) label.
Claims (9)
1. tiny glass ball type retroreflection sheet is characterized in that: the incident direction along light comprises that successively sealer, holding sheet, focus form layer, specular layer, adhesive phase, protection sheet; Holding sheet and focus form between the layer and are provided with dyed layer, dyed layer is embedded with glass bead, the top of described glass bead is positioned at holding sheet, the bottom is positioned at focus and forms layer, dyed layer is positioned at below the center of glass bead, form layer one side near focus, the thickness of dyed layer is 1～10% of glass bead diameter; The particle diameter of described glass bead is 10～150 μ m, and filling rate is 60～90%, and during the full glass bead of dyed layer embedding, filling rate is 100%, and wherein each hemispherical groove of specular layer is corresponding with a glass bead.
2. tiny glass ball type retroreflection sheet according to claim 1, it is characterized in that: be provided with printed layers between described sealer and the holding sheet, the coloured material of described printed layers is ink.
3. tiny glass ball type retroreflection sheet according to claim 1, it is characterized in that: the mean grain size of described glass bead is 20～100 μ m, and filling rate is 70～85%.
4. tiny glass ball type retroreflection sheet according to claim 1, it is characterized in that: the material of described dyed layer is organic pigment or the inorganic pigment of powdery; Described organic pigment is AZO pigments or phthalocyanine color; Described inorganic pigment is the pigment that utilizes the pigment of metal oxide or utilize ferric ferrocyanide, described pigment is a kind of of alkaline soil aluminic acid class, metal sulphide class, silicon class luminescence-utraviolet colorant, or alkaline soil aluminic acid class, the light-accumulated luminous colorant of metal sulphide class is a kind of.
5. tiny glass ball type retroreflection sheet according to claim 1, it is characterized in that: described specular layer is the metal level that the evaporation mode forms.
6. tiny glass ball type retroreflection sheet according to claim 1, it is characterized in that: the material of described adhesive phase is alkaline adhesive.
7. tiny glass ball type retroreflection sheet according to claim 1, it is characterized in that: described protection sheet is that paper is done lamination treatment with polyvinyl resin, wherein one side is processed through stripping shape with silicone and be made again.
8. tiny glass ball type retroreflection sheet according to claim 1, it is characterized in that: described sealer, holding sheet, the cambial material of focus comprise the smooth resins in film form with light transmitting property; Wherein resins in film form is one or more of acryl resin, alkyd resin, fluororesin, vestolit, polyester, urethane resin, polycarbonate;
Also comprise adjuvant in the material of sealer, described adjuvant is one or more of ultraviolet light absorber, stabilization agent, plasticizer, bridging agent.
9. tiny glass ball type retroreflection sheet according to claim 1, it is characterized in that: described sealer, holding sheet, focus form layer for water white transparency or colored transparent, during colored transparent, its color and dyed layer are identical or different, with the colorant dyeing of pigment class or dye class;
Yellow colorants is that isoindolone system, isoindoline system, quinophthalone system, anthraquinone system, pyrazolone system, flavanthrone system, benzimidazolone system or azo nickel are colorant in the colorant of described pigment class or dye class; Red stain is that anthraquinone system, perylene system, quinoline Azone system or indigoid are colorant; Blue colorant is that phthalocyanine system, father-in-law's reduction stain are, anthraquinone is, cobalt is colorant; Green colourant is that phthalocyanine system, emerald green system, chromium oxide system, cadmium are colorant; Dark brown colorant be monochrome colcother is arranged is colorant, may be used isoindolone is that yellow colorants, perylene are that red stain or phthalocyanine are blue colorant; Orange colorant is that monochrome has anthraquinone system, pyrazolone system, purple cyclic ketones system, perylene to be or the quinoline Azone is colorant, and may be used isoindolone is that yellow colorants or perylene are red stain; White color agents is that phthalein system, zinc system or lead are colorant; Black colorant be carbon black system, nigrosine system, the black system of perylene or titanium black be colorant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210342629.5A CN102902001B (en) | 2012-09-17 | 2012-09-17 | Small glass globe type retroreflection sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210342629.5A CN102902001B (en) | 2012-09-17 | 2012-09-17 | Small glass globe type retroreflection sheet |
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| CN102902001A true CN102902001A (en) | 2013-01-30 |
| CN102902001B CN102902001B (en) | 2014-11-12 |
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| CN201210342629.5A Active CN102902001B (en) | 2012-09-17 | 2012-09-17 | Small glass globe type retroreflection sheet |
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Cited By (10)
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| CN106526729A (en) * | 2015-09-11 | 2017-03-22 | 大韩艾恩希有限公司 | Open-type color reflective sheet and method of manufacturing the same |
| JP2017187598A (en) * | 2016-04-05 | 2017-10-12 | 株式会社ジャパンディスプレイ | Display device |
| WO2017201665A1 (en) * | 2016-05-24 | 2017-11-30 | 恩希爱（杭州）薄膜有限公司 | Anti-counterfeit reflective sheet and manufacturing method thereof |
| WO2018161256A1 (en) * | 2017-03-07 | 2018-09-13 | 恩希爱（杭州）薄膜有限公司 | Anti-counterfeit reflective sheet |
| CN109073796A (en) * | 2016-04-28 | 2018-12-21 | 日本电石工业株式会社 | Retroreflection sheet |
| CN109572271A (en) * | 2017-09-29 | 2019-04-05 | Dx正方有限责任公司 | Printed sheet and preparation method thereof |
| CN110033716A (en) * | 2019-04-26 | 2019-07-19 | 泉州市夜景辉反光材料有限公司 | A kind of light storage film and preparation method thereof |
| JP2020508487A (en) * | 2017-02-20 | 2020-03-19 | スリーエム イノベイティブ プロパティズ カンパニー | Retroreflective article having a contrast reduction layer |
| CN112175537A (en) * | 2020-09-30 | 2021-01-05 | 浙江远程车饰股份有限公司 | Automobile sun-proof sun-shading film and preparation method thereof |
| JP2021073104A (en) * | 2020-12-11 | 2021-05-13 | スリーエム イノベイティブ プロパティズ カンパニー | Graphic film for license plate, license plate and manufacturing method therefor |
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| CN106526729B (en) * | 2015-09-11 | 2018-05-04 | 大韩艾恩希有限公司 | A kind of preparation method of style of opening colour reflective piece |
| CN106526729A (en) * | 2015-09-11 | 2017-03-22 | 大韩艾恩希有限公司 | Open-type color reflective sheet and method of manufacturing the same |
| JP2017187598A (en) * | 2016-04-05 | 2017-10-12 | 株式会社ジャパンディスプレイ | Display device |
| CN109073796A (en) * | 2016-04-28 | 2018-12-21 | 日本电石工业株式会社 | Retroreflection sheet |
| CN109313293B (en) * | 2016-05-24 | 2021-12-28 | 恩希爱（杭州）薄膜有限公司 | Anti-counterfeiting reflector plate and preparation method thereof |
| WO2017201665A1 (en) * | 2016-05-24 | 2017-11-30 | 恩希爱（杭州）薄膜有限公司 | Anti-counterfeit reflective sheet and manufacturing method thereof |
| CN109313293A (en) * | 2016-05-24 | 2019-02-05 | 恩希爱（杭州）薄膜有限公司 | A kind of anti-fake reflector plate and preparation method thereof |
| US11500138B2 (en) | 2017-02-20 | 2022-11-15 | 3M Innovative Properties Company | Retroreflecting article with contrast reduction layer |
| JP2020508487A (en) * | 2017-02-20 | 2020-03-19 | スリーエム イノベイティブ プロパティズ カンパニー | Retroreflective article having a contrast reduction layer |
| JP7142018B2 (en) | 2017-02-20 | 2022-09-26 | スリーエム イノベイティブ プロパティズ カンパニー | Retroreflective article with contrast-reducing layer |
| WO2018161256A1 (en) * | 2017-03-07 | 2018-09-13 | 恩希爱（杭州）薄膜有限公司 | Anti-counterfeit reflective sheet |
| CN109073797A (en) * | 2017-03-07 | 2018-12-21 | 恩希爱（杭州）薄膜有限公司 | Anti-fake reflector plate |
| CN109572271A (en) * | 2017-09-29 | 2019-04-05 | Dx正方有限责任公司 | Printed sheet and preparation method thereof |
| CN110033716A (en) * | 2019-04-26 | 2019-07-19 | 泉州市夜景辉反光材料有限公司 | A kind of light storage film and preparation method thereof |
| CN112175537A (en) * | 2020-09-30 | 2021-01-05 | 浙江远程车饰股份有限公司 | Automobile sun-proof sun-shading film and preparation method thereof |
| JP2021073104A (en) * | 2020-12-11 | 2021-05-13 | スリーエム イノベイティブ プロパティズ カンパニー | Graphic film for license plate, license plate and manufacturing method therefor |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Block south of Xiaoshan economic and Technological Development Zone Hongda Road, Xiaoshan District of Hangzhou City, Zhejiang Province, No. 99 311231 Patentee after: (Hangzhou) Film Co., Ltd. Address before: Block south of Xiaoshan economic and Technological Development Zone Hongda Road, Xiaoshan District of Hangzhou City, Zhejiang Province, No. 99 311231 Patentee before: Nippon Carbide Industries (Hangzhou) Co., Ltd. |