CN103804781A - A polypropylene resin composition reinforced with a long fiber and molded article using the same - Google Patents
A polypropylene resin composition reinforced with a long fiber and molded article using the same Download PDFInfo
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- CN103804781A CN103804781A CN201310257702.3A CN201310257702A CN103804781A CN 103804781 A CN103804781 A CN 103804781A CN 201310257702 A CN201310257702 A CN 201310257702A CN 103804781 A CN103804781 A CN 103804781A
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- polypropylene resin
- resin composite
- fiber reinforced
- continuous fiber
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
- C08L23/142—Copolymers of propene at least partially crystalline copolymers of propene with other olefins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/004—Additives being defined by their length
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention relates to a polypropylene resin composition reinforced with a long fiber for an anti-vibration pad of an automobile. The resin composition, relative to 100 parts by weight of matrix resin composed of 30 to 100 w% of noblen and 0 to 70 w% of ethylene-propylene copolymer, contains (B) 50 to 70 parts by weight of long fiber, (C) 20 to 50 parts by weight of ethylene compound selected from a group composed of styrene polymer, diene polymer, and styrene-diene polymer, and (D) 1 to 15 parts by weight of fiber filling material having a length of 5-20mm. Because of excellent impact intensity and flowability, as well as low proportion, the resin composition can realize thin film formation and light weight while being used as automobile interior and exterior device materials such as anti-vibration pads.
Description
Technical field
The present invention relates to continuous fiber reinforced polypropylene resin composite and utilize the synthetic resin of its manufacture, more specifically, relate to a kind of synthetic resin that can make the further continuous fiber reinforced polypropylene resin composite of strengthening of mechanical characteristics of products formed and utilize its manufacture.
Background technology
As plastics are used as the interior material of automobile, should meet the basic conditions such as shock-resistance, resistance and formability.Therefore, the mixture of the polycarbonate that comprises described physical property and acrylonitrile-butadiene-styrene copolymer (ABS), or start to be used with the engineering plastic materials of glass fibre (Glass Fiber) strengthening acrylonitrile-butadiene-styrene copolymer.
Particularly in acrylonitrile-butadiene-styrene copolymer to the continuous fiber reinforced thermoplastically macromolecular material after glass fiber-reinforced, have more outstanding physical property characteristic such as outstanding mechanical properties and low linear expansion coefficient etc. due to advantages such as recycling and formabilities with than staple fibre strengthening macromolecular material, be applied to the various industries such as household electrical appliances, building materials, particularly the use in the automobile industry that requires lightweight and recycling characteristic expands.But although its physical property of described resin is outstanding, shortcoming is that price is very expensive, with polyolefin-based resins, particularly, compared with propylene resin, resistance and recycling are in a disadvantageous position, therefore, reality is to be replaced gradually by polypropylene resin composite.
Recently, as polyethylene or the polypropylene of polyolefin-based resins, compared with acrylic resin in the past, the aspects such as formability, shock-resistance, resistance are outstanding, also because thering is low-gravity and low price, therefore, be widely used as the interior material purposes such as external device (ED) material and various weighting materials such as collision bumper of automobile.But, they compared with original engineering plastic materials, due to rigidity and thermotolerance low, existence must increase thickness, problem with structural strengthenings such as muscle reinforcements, need to improve it.
Summary of the invention
(technical problem that will solve)
Object of the present invention aims to provide a kind of macrofiber polypropylene resin composite of high impact properties.
Object of the present invention aims to provide a kind of low-gravity macrofiber polypropylene resin composite.
Another object of the present invention aims to provide the outstanding macrofiber polypropylene resin composite of a kind of mobility.
Another object of the present invention aims to provide a kind of automobile vibration isolating pad with the manufacture of macrofiber polypropylene resin composite.
(means of dealing with problems)
A kind of viewpoint of the present invention relates to macrofiber polypropylene resin composite, matrix resin 100 weight parts that are made up of alfon 30～100 % by weight and ethylene propylene copolymer 0～70 % by weight with respect to (A), comprise (B) macrofiber 50～70 weight parts; (C) vinyl compound 20～50 weight parts of selecting in the group being formed by styrenic, diene polymer and vinylbenzene-diene interpolymer; And fiber-filled material 1～5 weight part that (D) length is 5～20mm.
Described macrofiber (B) can be that diameter is the glass fibre of 3～100 μ m.
Described fiber-filled material (D) can be that diameter is 3～100 μ m, there is the fibrous or fascircular texture of round shape or polygonal cross-section, in the group being formed by carbon fiber bar, basalt fibre, macromolecular fibre and their mixture, select more than a kind.
Described alfon can be high crystalline resin, and melting index (Melt Index) is 10～25 (g/10min) at 230 ℃, and isotactic index (Isotactic index) is more than 96%.
The melting index (MeltIndex) of described ethylene propylene copolymer can be 100～2,000 (g/10min) at 230 ℃, carries out copolymerization by propylene monomer and vinyl monomer by the weight ratio of 5:1～25:1.
The melting index of described vinyl compound can be 10～40 (g/10min) at 230 ℃.
The limiting viscosity [η] that described propene polymer is measured in 135 ℃ of naphthalane solvents can be 0.7～2.5
, described ethylene propylene copolymer can be 3.0～6.0
.
Described continuous fiber reinforced polypropylene resin composite tensile strength can be more than 750MPa (ISO527), flexural stiffness is more than 850MPa (ISO178), bending elastic modulus is more than 35,000MPa (ISO178), and shock strength is 33KJ/m
2(ISO180) more than.
Another viewpoint of the present invention relates to the automobile vibration isolating pad with described continuous fiber reinforced polypropylene resin composite manufacture.
(effect of invention)
Macrofiber polypropylene resin composite of the present invention due to shock strength and mobility outstanding, belong to low-gravity, thereby during for the automobile inside and outside such as vibration isolating pad device materials, can realize film forming and lightweight.
Embodiment
Continuous fiber reinforced polypropylene resin composite of the present invention, matrix resin 100 weight parts that are made up of alfon 30～100 % by weight and ethylene propylene copolymer 0～70 % by weight for (A), can comprise: (B) macrofiber 50～70 weight parts; (C) vinyl compound 20～50 weight parts of selecting in the group being formed by styrenic, diene polymer and vinylbenzene-diene interpolymer; And fiber-filled material 1～5 weight part that (D) length is 5～20mm.
Lower mask body examination the present invention.
Continuous fiber reinforced polypropylene resin composite of the present invention, as using acrylic resin containing being soaked with long stapled matrix resin (A).Described acrylic resin, as the alfon by take propylene monomer as main composition and the crystalline polymer that the ethylene propylene copolymer that contains ethene forms, can use separately ethylene propylene copolymer or mix use with alfon.
Described alfon can use the five-tuple mark (%mmmm) of measuring take 13C-NMR as 96% above person, preferably uses 96.5% above person, more preferably uses 97% above person.Now, if five-tuple mark less than 96%, the decline such as rigidity, thermotolerance.In addition, the limiting viscosity [η] that propene polymer is measured in 135 ℃ of naphthalane solvents can be 0.7～2.5
, be preferably 0.85～2.2
, more preferably 0.9～2.0
.If limiting viscosity less than 0.7
, shock strength can decline, if exceed 2.5
, formability can be low.Described alfon preferred molten index (Melt Index) is 10～25 (g/10min) at 230 ℃.
It is 3.0～6.0 that ethylene propylene copolymer can use the limiting viscosity [η] of measuring in 135 ℃ of naphthalane solvents
.If limiting viscosity less than 3.0
, shock strength can be low.Preferred limiting viscosity can be 3.5
below, especially 4.0
above.In addition, preferred molten index (Melt Index) is 100～2,000 (g/10min) at 230 ℃, and propylene monomer and vinyl monomer carry out copolymerization by the weight ratio of 5:1～25:1.
And aspect shock strength and mobility balance, the weight ratio that preferably alfon and ethylene propylene copolymer comprise 0～30:100～70, more preferably comprises the weight ratio of 0～20:100～80.The shock-resistance deficiency of alfon, the deficiencies such as the formability of ethylene propylene copolymer, rigidity, thermotolerance, described two kinds of compositions can mix and complementary use.
The macrofiber of impregnation (B) in described matrix resin, can use diameter is the glass fibre of 3～100 μ m.Described long glass fibres can use E-glass (E GLASS), improve ECR glass (ECR GLASS), high-intensity S, S-2, R, the T glass (S of erosion resistance, S-2, R, T GLASS), acid proof C.A glass (C.A GLASS) etc.Particularly E-glass (E-GLASS) aspect business more preferably.In matrix resin, the macrofiber of impregnation can use with pelletizing shape, can use the chopped strand (chop strand) of 8～16mm.If the curtailment 8mm of pelletizing, remaining staple length will step-down, and shock-resistance is low, if exceed 16mm, product processing and formability will decline.This long glass fibres can preferably comprise 50～70 weight parts for described matrix resin 100 weight parts.If less than 50 weight parts, rigidity and thermotolerance will be low, if exceed 70 weight parts, mobility will sharply decline, and formability will be low.
Resin combination of the present invention, outside described matrix resin, can also be included in the vinyl compound (C) of selecting in the group being made up of styrenic, diene polymer and vinylbenzene-diene interpolymer.The melting index of preferred described styrenic, diene polymer or its multipolymer is 10～40 (g/10min) at 230 ℃.
Described styrenic can polymerizing styrene, alpha-methyl styrene, α-ethyl styrene, alpha-methyl styrene etc. are manufactured as styrenic monomers, preferably can use vinylbenzene.Diene polymer can carry out polymerization manufacture as monomer using divinyl, isoprene or its combination.
Guaranteeing that aspect shock strength, preferred described vinyl compound (C) comprises 20～50 weight parts with respect to matrix resin 100 weight parts.
Resin combination of the present invention can also comprise the fiber-filled material that length is 5～20mm (D).As an example, described fiber-filled material can be that diameter is 3～100 μ m, there is the fibrous and fascircular texture of round shape or polygonal cross-section, in the group being formed by carbon fiber bar, basalt fibre, macromolecular fibre and their mixture, select more than a kind.
Guaranteeing that aspect intensity and formability, preferred described fiber-filled material comprises 1～15 weight part with respect to matrix resin 100 weight parts.
As the additive that can add in the present invention, typically, such as oxidation inhibitor, neutralizing agent, coupling agent, static inhibitor etc., make it to contain at appropriate content range.Wherein, as oxidation inhibitor, can use phenol is that oxidation inhibitor, phosphite are oxidation inhibitor, thio-2 acid synergistic agent etc., as neutralizing agent, can use calcium stearate, zinc oxide etc., coupling agent can use toxilic acid etc. to have polymer of reactive functional groups etc., and these and other additive can easily be used by person of ordinary skill in the field.
Tensile strength with this composition and the final continuous fiber reinforced polypropylene resin composite of manufacturing of composition is preferably 750MPa (ISO527), flexural stiffness is more than 850MPa (ISO178), bending elastic modulus is 35, more than 000MPa (ISO178), shock strength is 33KJ/m
2(ISO180) more than.
The manufacture method of the continuous fiber reinforced polypropylene resin composite of the present invention coordinating with composition described above there is no particular determination.
For example, continuous fiber reinforced polypropylene resin composite of the present invention can be obtained by following methods,,, according to common mechanical type hybrid system, described (A) composition is manufactured in melting, (B) composition is carried out after thermal pretreatment, be combined for making the mixture of described (A) composition realize interface with (B) composition, carry out plastic packaging with impregnation method, make it cooling and curing after, utilize shear to block, can obtain the pelletizing shape of 1 mixture.Particularly, (A) mixing of composition can choice for use utilizes the method for the common melting mixing machine such as simple helix forcing machine, duplex forcing machine, multi-spiral forcing machine, preferably at 200～240 ℃ of mixing temperatures, carries out.More specifically, make 1 mixture impregnation raise and carry out by means of pre-processing device the fibrous bundle ((B) composition) of thermal pretreatment from crin type glass fibre, make to contact in molding device, make impregnation form each filament of glass fiber of fibrous bundle ((B) composition), by being positioned at the nozzle of molding device end, regulate multiple content of glass fiber, then make it cooling, solidify, block into the pelletizing of arbitrary shape by means of shear and make it dry, obtaining resin of the present invention.1 mixture pelletizing so manufacturing is that described (C) composition and (D) composition are mixed again with the pelletizing of the arbitrary shape through the manufacture of common mechanical type hybrid system, finally obtains continuous fiber reinforced polypropylene resin composite.
With regard to the moulding process of composition of the present invention, extrusion moulding, slush molding, injection moulding, plate shaping etc. all can, without particular determination, but, injection moulding is the most applicable.
Claims (9)
1. a continuous fiber reinforced polypropylene resin composite, is characterized in that,
Matrix resin 100 weight parts that are made up of alfon 30～100 % by weight and ethylene propylene copolymer 0～70 % by weight with respect to (A), comprise:
(B) macrofiber 50～70 weight parts;
(C) vinyl compound 20～50 weight parts of selecting in the group being formed by styrenic, diene polymer and vinylbenzene-diene interpolymer; And
(D) fiber-filled material 1～15 weight part that length is 5～20mm.
2. continuous fiber reinforced polypropylene resin composite according to claim 1, is characterized in that,
Described macrofiber (B) is that diameter is the glass fibre of 3～100 μ m.
3. continuous fiber reinforced polypropylene resin composite according to claim 1, is characterized in that,
Described fiber-filled material (D) is that diameter is 3～100 μ m, there is the fibrous or fascircular texture of round shape or polygonal cross-section, in the group being formed by carbon fiber bar, basalt fibre, macromolecular fibre and their mixture, select more than a kind.
4. continuous fiber reinforced polypropylene resin composite according to claim 1, is characterized in that,
Described alfon is high crystalline resin, and melting index (Melt Index) is 10～25 (g/10min) at 230 ℃,
Isotactic index (Isotactic index) is more than 96%.
5. continuous fiber reinforced polypropylene resin composite according to claim 1, is characterized in that,
The melting index (Melt Index) of described ethylene propylene copolymer is 100～2,000 (g/10min) at 230 ℃, carries out copolymerization by propylene monomer and vinyl monomer by the weight ratio of 5:1～25:1.
6. continuous fiber reinforced polypropylene resin composite according to claim 1, is characterized in that,
The melting index of described vinyl compound is 10～40 (g/10min) at 230 ℃.
7. continuous fiber reinforced polypropylene resin composite according to claim 1, is characterized in that,
The limiting viscosity [η] of measuring in 135 ℃ of naphthalane solvents, described propene polymer is 0.7～2.5
, described ethylene propylene copolymer is 3.0～6.0
.
8. continuous fiber reinforced polypropylene resin composite according to claim 1, is characterized in that,
The tensile strength of described continuous fiber reinforced polypropylene resin composite is more than 750MPa (ISO527), flexural stiffness is more than 850MPa (ISO178), bending elastic modulus is more than 35,000MPa (ISO178), and shock strength is 33KJ/m
2(ISO180) more than.
9. the automobile vibration isolating pad with the continuous fiber reinforced polypropylene resin composite manufacture of any one in claim 1～8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020120125721A KR101549663B1 (en) | 2012-11-07 | 2012-11-07 | A polypropylene resin composition reinforced with a long glass fiber and molded article using the same |
| KR10-2012-0125721 | 2012-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103804781A true CN103804781A (en) | 2014-05-21 |
Family
ID=50702199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310257702.3A Pending CN103804781A (en) | 2012-11-07 | 2013-06-26 | A polypropylene resin composition reinforced with a long fiber and molded article using the same |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101549663B1 (en) |
| CN (1) | CN103804781A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102272077B1 (en) * | 2014-11-13 | 2021-07-05 | 현대모비스 주식회사 | Polyolefin elastomer composition |
| KR101836627B1 (en) | 2016-05-02 | 2018-04-19 | 현대자동차주식회사 | Compositions of polypropylene having excellent tactile sensation and dimensional stability |
| KR101905993B1 (en) | 2016-10-31 | 2018-10-10 | 현대자동차주식회사 | Interior parts for vehicle and method for manufacturing the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0634451A2 (en) * | 1993-07-17 | 1995-01-18 | Hoechst Aktiengesellschaft | Resinous moulding matter for manufacture of mouldings having decorative effect |
| US20070087193A1 (en) * | 2005-10-17 | 2007-04-19 | Lee Jae S | Long-fiber-reinforced polypropylene compositions and door shield module plate produced with the same |
| KR100854322B1 (en) * | 2007-04-30 | 2008-08-26 | 지에스칼텍스 주식회사 | Pellet reinforced by long fiber and article manufactured by using the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100300184B1 (en) | 1998-06-17 | 2001-10-27 | 이정국 | Fiber-reinforced resin composition and its manufacturing method |
| KR100811922B1 (en) | 2007-02-13 | 2008-03-10 | 현대자동차주식회사 | Resin composition of polypropylene |
-
2012
- 2012-11-07 KR KR1020120125721A patent/KR101549663B1/en active IP Right Grant
-
2013
- 2013-06-26 CN CN201310257702.3A patent/CN103804781A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0634451A2 (en) * | 1993-07-17 | 1995-01-18 | Hoechst Aktiengesellschaft | Resinous moulding matter for manufacture of mouldings having decorative effect |
| US20070087193A1 (en) * | 2005-10-17 | 2007-04-19 | Lee Jae S | Long-fiber-reinforced polypropylene compositions and door shield module plate produced with the same |
| KR100854322B1 (en) * | 2007-04-30 | 2008-08-26 | 지에스칼텍스 주식회사 | Pellet reinforced by long fiber and article manufactured by using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101549663B1 (en) | 2015-09-03 |
| KR20140059377A (en) | 2014-05-16 |
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Inventor after: Sun Changwan Inventor after: Quan Yong Inventor after: Jin Xuandun Inventor after: Xu Xiakui Inventor after: Xu Zongtai Inventor after: Fu Xiongzai Inventor before: Sun Changwan Inventor before: Quan Yong Inventor before: Jin Xuandun |
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Free format text: CORRECT: INVENTOR; FROM: SUN CHANGWAN QUAN YONG JIN XUANDUN TO: SUN CHANGWAN QUAN YONG JIN XUANDUN XU XIAKUI XU ZONGTAI FU XIONGZAI |
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Application publication date: 20140521 |