CN103497463A - FEP guide tube achieving filling modification with barium sulfate - Google Patents
FEP guide tube achieving filling modification with barium sulfate Download PDFInfo
- Publication number
- CN103497463A CN103497463A CN201310502491.5A CN201310502491A CN103497463A CN 103497463 A CN103497463 A CN 103497463A CN 201310502491 A CN201310502491 A CN 201310502491A CN 103497463 A CN103497463 A CN 103497463A
- Authority
- CN
- China
- Prior art keywords
- fep
- barium sulfate
- modified
- filling
- conduit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Materials For Medical Uses (AREA)
Abstract
The invention relates to an FEP guide tube achieving filling modification with barium sulfate. The FEP guide tube comprises the following components of 50-70% of FEP resin, 30-50% of modified barium sulfate master batches, 1-10 % of dispersing agents, 0.5-5% of pigments and 0.1-2% of antioxygen. Firstly, the FEP resin, the modified barium sulfate master batches and dispersing agent solutions including acetone or ethyl alcohol are placed in a low-speed blender and are stirred for 1-5min at normal temperature and normal pressure, then the pigments and the antioxygen are added, high-speed stirring is carried out for 10-30min, and the FEP guide tube is manufactured through a single screw rod in an extrusion forming mode at 330-380 DEG C within the range of the rotating speed of 10-30r/min. The manufactured FEP guide tube has the good performance of being high in tensile strength, low in shrinking percentage, uniform in color and luster and the like, and meanwhile due to the good diffusion effect of the barium sulfate, the FEP guide tube can have good developing performance by being irradiated by radial light.
Description
technical field
The present invention relates to a kind of filling-modified FEP conduit, particularly relate to a kind of with the filling-modified FEP conduit of barium sulfate.
Background technology
Along with improving constantly of science and technology and medical level, the application of all kinds of macromolecular materials in medical industry obtained development fast.Fluorine material is as a kind of features macromolecular material, there is good mechanical property, the advantages such as good erosion resistance, blood-clot resistance, be widely used in the every field of modern medicine, but due to the monopolization of foreign technology and the cognitive level of domestic market, recent years, fluorine material just presents the fast-developing impetus in China's medical industry, and substituting import one is progressively arranged, improves the trend of domestic medical product.And this trend improves the significant of China people medical level for the fast development that promotes China's medical industry.
Traditional angiography catheter generally adopts the commodity polymer material preparations such as PP, PE, under radiation exposure, by angiography catheter side mouth injection barium sulfate contrast solution, can produce the radiography effect, to determine diseased region, and the control of performing the operation.But because the situation of diseased region is generally more complicated, in surgical procedure, the doctor needs the multiple injection contrast medium, and the one-tenth branch of contrast medium has side effects to human body, particularly renal function.Simultaneously because the blood-clot resistance of the commodity polymer materials such as PP, PE is poor, in surgical procedure, require the time of operation shorter, objectively affect and restricted the carrying out of operation, and, after fluoroplastics contact blood, can form on its surface the stable antithrombotic film of one deck, thereby induce vascular endothelial cell, form the smooth biostrome of one deck, make the macromolecular material of script without blood-clot resistance, obtained natural blood-clot resistance.So reducing the usage quantity of contrast medium and the selecting properly of material is current angiography catheter problem demanding prompt solution.
Perfluoroethylene-propylene (FEP), be called for short F46, it is the multipolymer of tetrafluoroethylene and hexafluoroethylene, a trifluoromethyl group (CF3) is arranged on molecular structure, therefore, it not only has similar to other fluoroplastics wear-resisting, acid and alkali-resistance, the performance that blood compatibility etc. are excellent, but also there is the good machining property that other fluoroplastics do not have, but because its viscosity is large, speed of cooling is fast, shrinking percentage is larger, the defects such as poor dimensional stability, because making its degree of crystallinity, reduces its asymmetric molecular structure simultaneously, therefore, FEP is in the course of processing, very easily decompose, while surpassing critical shear rate, surface can produce the problem of tiny crack.Objectively limited its application in industry, medical science and precise forming field.
Summary of the invention
In view of the problem that known technology in background technology exists, the object of the invention is to propose the FEP conduit of a kind of high tensile, low-shrinkage, excellent developing.
To achieve these goals, the invention provides a kind of barium sulfate modified column FEP conduit, formed by following component and weight percentage: FEP resin 50-70%, modified barium sulphate master batch 30-50%, dispersion agent 1-10%, pigment 0.5-5%, oxidation inhibitor 0.1-2%; First FEP resin, modified barium sulphate master batch and the dispersant solution that contains acetone or alcohol are positioned in low-speed mixer, under normal temperature and pressure, stir 1-5min, after pigment and oxidation inhibitor are added, high-speed stirring 10-30min, then at 330-380 ℃, in the scope of rotating speed 10-30r/min, through single screw extrusion molding, prepare the FEP conduit.
Beneficial effect of the present invention is as follows:
Adopting inorganic rigid particle to carry out filling-modified to macromolecular material is a kind of the most frequently used method of modifying plastics, and the method not only can reduce the cost of material, but also can improve the performance of material, increases that it is functional.
Adopt the filling-modified FEP of solid sulphuric acid barium, can reduce the usage quantity of contrast medium on the one hand, reduce the side effect of operation, improve the security of operation, can also reduce on the other hand the frictional force of FEP resin in the course of processing and between screw rod, improve the dimensional stability of FEP resin, tensile property and the processing characteristics of FEP resin have been increased, meet its demand in high-accuracy field of industrialized production, and dispersed uniformly, can make it produce good development effect under the radiation exposure condition, meet its service requirements in medical field.
Embodiment
Below describe in detail according to of the present invention with the filling-modified FEP conduit of barium sulfate.
According to of the present invention, with the filling-modified FEP conduit of barium sulfate, by following component and weight part, formed: FEP resin 50-70%, modified barium sulphate master batch 30-50%, dispersion agent 1-10%, pigment 0.5-5%, oxidation inhibitor 0.1-2%; First FEP resin, modified barium sulphate master batch and the dispersant solution that contains acetone or alcohol are positioned in low-speed mixer, under normal temperature and pressure, stir 1-5min, after pigment and oxidation inhibitor are added, high-speed stirring 10-30min, then at 330-380 ℃, in the scope of rotating speed 10-30r/min, through single screw extrusion molding, prepare the FEP conduit.
In the FEP conduit filling-modified with barium sulfate according to the present invention, in described modified barium sulphate master batch, the content of barium sulfate is 10-30%, to guarantee the barium sulfate content abundance, makes development effect obvious, be convenient to control the operation process, and do not affect the processing characteristics of FEP resin.
In the FEP conduit filling-modified with barium sulfate according to the present invention, in described modified barium sulphate master batch, matrix resin is selected one or more in different melting index FEP resins.
In the FEP conduit filling-modified with barium sulfate according to the present invention, in described modified barium sulphate master batch, the melting index of matrix resin FEP is between 3-8g/min.
In the FEP conduit filling-modified with barium sulfate according to the present invention, described modified barium sulphate master batch adopts the twin screw extruder granulation, or adopts the granulation of banburying unit.
In the FEP conduit filling-modified with barium sulfate according to the present invention, the particle diameter of the barium sulfate powder in described modified barium sulphate master batch is at 0.5 μ m-10 μ m.In theory, the inorganic particulate that particle diameter is too little can form agglomeration under the molten state of FEP, cause the reduction of material mechanical performance, and the too large inorganic particulate of particle diameter not only can affect its dispersion effect in FEP, can cause equally the reduction of FEP mechanical property.The barium sulfate particle that particle diameter is 0.5 μ m-10 μ m is mainly to consider dispersed and good development effect.
In the FEP conduit filling-modified with barium sulfate according to the present invention, described pigment is one or more in inorganic oxide, carbide and boride.
Described oxide compound is selected from a kind of in aluminum oxide, plumbous oxide, zinc oxide, silicon oxide, cupric oxide, titanium oxide, ferric oxide, nickel oxide; Described nitride is selected from a kind of in silicon nitride, boron nitride, aluminium nitride, titanium nitride or zirconium nitride; Described carbide is selected from a kind of in silicon carbide, zirconium carbide, norbide, wolfram varbide or aluminium carbide.
In the FEP conduit filling-modified with barium sulfate according to the present invention, described dispersion agent is selected one or more in ammonium perfluorocaprylate, perfluor-2.5-dimethyl-3.6-dioxa n-nonanoic acid, perfluor oxygen in ninth of the ten Heavenly Stems base benzene sulfonate.
In the FEP conduit filling-modified with barium sulfate according to the present invention, described oxidation inhibitor is selected one or more in sulfur-bearing oxidation inhibitor and phosphite antioxidant.
Described sulfur-bearing oxidation inhibitor is selected from a kind of in the two stearyl of 2,4-bis--(n-octylthiomethylene)-6-methylphenol, Tyox B, thio-2 acid; Described phosphite ester kind antioxidant is selected from a kind of in distearyl pentaerythritol diphosphite, three (nonyl phenyl) phosphorous acid ester, three (2,4-di-tert-butyl-phenyl) phosphorous acid ester.
In the FEP conduit filling-modified with barium sulfate according to the present invention, described single screw extrusion machine screw rod and the material tube inner wall that contacts with screw rod adopt the steel alloy that corrodibility is stronger or adopt electroplating surface wear-and corrosion-resistant layer.
Below provide the embodiment that uses the filling-modified FEP conduit of barium sulfate according to of the present invention.
Embodiment 1:
The FEP resin 50% that each ingredients weight parts is 5g/min by melting index respectively, the modified barium sulphate master batch 40% that contains 10 μ m barium sulfate powder, titanium dioxide 2%, ammonium perfluorocaprylate 7%, 1% preparation of three (nonyl phenyl) phosphorous acid ester.First FEP resin, modified barium sulphate master batch and the perfluoro ammonium caprylate solution that contains acetone or alcohol are positioned in low-speed mixer, under normal temperature and pressure, stir 1-2min, after titanium dioxide and three (nonyl phenyl) phosphorous acid ester is added, high-speed stirring 10min.Said mixture is being dried 1 hour more than 100 ℃, guaranteeing that the small molecules such as moisture and ethanol overflow.360 ℃ of the highest extrusion temperatures, under the condition of rotating speed 10r/min, through single screw extrusion molding, prepare the FEP conduit.After measured, the tensile strength of this tubing is that 24MPa(tests by GB/T 1040-92, thickness is 2mm, draw speed 50mm/min ± 10%), shrinking percentage is 1.8%, tube surfaces is smooth, be even white, development effect is obvious, and the color and luster homogeneous, and without the FEP conduit of barium sulfate modified column, the not enough 20MPa of its tensile strength, matter is soft, is the transparency, shrinking percentage is more than 3.5, after modified barium sulphate master batch modification through containing 10 μ m barium sulfate powder, tensile strength obviously rises, and shrinking percentage reduces, the color and luster homogeneous, development effect is obvious.
Embodiment 2:
Each ingredients weight parts is respectively by the FEP resin 30% of melting index 3g/min, the FEP resin 40% of melting index 8g/min, the modified barium sulphate master batch 25% that contains 5 μ m barium sulfate powder, titanium dioxide 2%, ammonium perfluorocaprylate 2%, 1% preparation of three (nonyl phenyl) phosphorous acid ester.Specific implementation method is with example one.After measured, the tensile strength of this tubing is that 25.8MPa(tests by GB/T 1040-92, thickness is 2mm, draw speed 50mm/min ± 10%), shrinking percentage is 1.8%, and without the FEP conduit of barium sulfate modified column, matter is soft, tensile strength is 22 MPa, average shrinkage ratio is 3.8%, after modified barium sulphate master batch modification through containing 5 μ m barium sulfate powder, tensile strength obviously rises, shrinking percentage reduces, catheter surface is smooth, be even white, and color and luster homogeneous, can show that the dispersion effect of 5 μ m barium sulfate in the FEP resin is better, disperse more balanced, development effect is more obvious, in surgical procedure, can avoid multiple injection fluid sulphuric acid barium solution, to reduce the side effect to human body, improve the security of operation.
Embodiment 3:
The FEP resin 70% that each ingredients weight parts is 5g/min by melting index respectively, contain 5 μ m barium sulfate powder modified barium sulphate master batches 25%, titanium dioxide 2%, ammonium perfluorocaprylate 2%, Tyox B 1% preparation.First FEP resin, modified barium sulphate master batch and the perfluoro ammonium caprylate solution that contains acetone or alcohol are positioned in low-speed mixer, under normal temperature and pressure, stir 5min, after titanium dioxide and Tyox B are added, high-speed stirring 20min.Said mixture is being dried 1 hour more than 100 ℃, guaranteeing that the small molecules such as moisture and ethanol overflow.Be 340 ℃ at the highest extrusion temperature, under the condition of rotating speed 20r/min, through single screw extrusion molding, prepare FEP tubing.After measured, the tensile strength of this tubing is that 26.6MPa(tests by GB/T 1040-92, and thickness is 2mm, draw speed 50mm/min ± 10%), shrinking percentage is 1.8%, and tube surfaces is smooth, and two-phase is evenly distributed.And without the FEP conduit of barium sulfate modified column, in the course of processing, there will be the melt fracture phenomenon, make the surface of conduit be corrugated, surface not only, under solar ray irradiates, the color and luster obfuscation, and after barium sulfate modified column, the solution fracture phenomena of FEP conduit obviously reduces, it is excellent that processing characteristics becomes, and catheter surface is smooth, the color and luster homogeneous.
Embodiment 4:
The FEP resin 50% that each ingredients weight parts is 5g/min by melting index respectively, the modified barium sulphate master batch 40% that contains 5 μ m barium sulfate powder, titanium dioxide 1%, nickel oxide 1%, dispersion agent 7%, Tyox B 1% preparation.Specific implementation method is with example three.After measured, the tensile strength of this tubing is that 26.8MPa(tests by GB/T 1040-92, and thickness is 2mm, draw speed 50mm/min ± 10%), shrinking percentage is 1.4%, and tube surfaces is smooth, and two-phase is evenly distributed.And, without the FEP conduit of barium sulfate modified column, matter is soft, be the transparency, the external waviness shape is obvious, and, after the modification of modified barium sulphate master batch, tensile strength obviously rises, and shrinking percentage reduces, and catheter surface is smooth, is light green, and the color and luster homogeneous.
Claims (12)
1. a FEP conduit filling-modified with barium sulfate, is characterized in that being comprised of following component and weight percentage: FEP resin 50-70%, modified barium sulphate master batch 30-50%, dispersion agent 1-10%, pigment 0.5-5%, oxidation inhibitor 0.1-2%; First FEP resin, modified barium sulphate master batch and the dispersant solution that contains acetone or alcohol are positioned in low-speed mixer, under normal temperature and pressure, stir 1-5min, after pigment and oxidation inhibitor are added, high-speed stirring 10-30min, then at 330-380 ℃, in the scope of rotating speed 10-30r/min, through single screw extrusion molding, prepare the FEP conduit.
2. as claimed in claim 1 with the filling-modified FEP conduit of barium sulfate, the content that it is characterized in that barium sulfate in described modified barium sulphate master batch is 10-30%.
3. as claimed in claim 1 with the filling-modified FEP conduit of barium sulfate, it is characterized in that in described modified barium sulphate master batch, matrix resin is selected one or more in different melting index FEP resins.
4. as claimed in claim 1 with the filling-modified FEP conduit of barium sulfate, it is characterized in that the melting index of matrix resin FEP in described modified barium sulphate master batch is between 3-8g/min.
5. as claimed in claim 1 with the filling-modified FEP conduit of barium sulfate, it is characterized in that described modified barium sulphate master batch adopts the twin screw extruder granulation, or adopt the granulation of banburying unit.
6. as claimed in claim 1 with the filling-modified FEP conduit of barium sulfate, it is characterized in that the particle diameter of the barium sulfate powder in described modified barium sulphate master batch is at 0.5 μ m-10 μ m.
7. as claimed in claim 1 with the filling-modified FEP conduit of barium sulfate, it is characterized in that described pigment is one or more in inorganic oxide, carbide and boride.
8. as claimed in claim 7 with barium sulfate filling-modified FEP conduit, it is characterized in that described oxide compound is selected from a kind of in aluminum oxide, plumbous oxide, zinc oxide, silicon oxide, cupric oxide, titanium oxide, ferric oxide, nickel oxide; Described nitride is selected from a kind of in silicon nitride, boron nitride, aluminium nitride, titanium nitride or zirconium nitride; Described carbide is selected from a kind of in silicon carbide, zirconium carbide, norbide, wolfram varbide or aluminium carbide.
9. as claimed in claim 1 with barium sulfate filling-modified FEP conduit, it is characterized in that described dispersion agent selects one or more in ammonium perfluorocaprylate, perfluor-2.5-dimethyl-3.6-dioxa n-nonanoic acid, perfluor oxygen in ninth of the ten Heavenly Stems base benzene sulfonate.
10. as claimed in claim 1 with the filling-modified FEP conduit of barium sulfate, it is characterized in that described oxidation inhibitor is one or more in sulfur-bearing oxidation inhibitor and phosphite antioxidant.
11. as claimed in claim 10 with the filling-modified FEP conduit of barium sulfate, it is characterized in that described sulfur-bearing oxidation inhibitor is selected from a kind of in the two stearyl of 2,4-bis--(n-octylthiomethylene)-6-methylphenol, Tyox B, thio-2 acid; Described phosphite ester kind antioxidant is selected from a kind of in distearyl pentaerythritol diphosphite, three (nonyl phenyl) phosphorous acid ester, three (2,4-di-tert-butyl-phenyl) phosphorous acid ester.
12. as claimed in claim 1 with the filling-modified FEP conduit of barium sulfate, it is characterized in that described single screw extrusion machine screw rod and contact the stronger steel alloy of material tube inner wall employing corrodibility or employing electroplating surface wear-and corrosion-resistant layer with screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310502491.5A CN103497463B (en) | 2013-10-23 | 2013-10-23 | The FEP conduit that a kind of barium sulfate is filling-modified |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310502491.5A CN103497463B (en) | 2013-10-23 | 2013-10-23 | The FEP conduit that a kind of barium sulfate is filling-modified |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103497463A true CN103497463A (en) | 2014-01-08 |
| CN103497463B CN103497463B (en) | 2015-11-25 |
Family
ID=49862729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310502491.5A Active CN103497463B (en) | 2013-10-23 | 2013-10-23 | The FEP conduit that a kind of barium sulfate is filling-modified |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103497463B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107501655A (en) * | 2017-09-12 | 2017-12-22 | 天津鹏翎胶管股份有限公司 | It is bonded the preparation of the exploitation of high acrylonitrile nitrile rubber formula of FEP resins and products thereof oil filling pipe |
| CN108276638A (en) * | 2017-12-29 | 2018-07-13 | 深圳职业技术学院 | A kind of tubing and preparation method thereof with X-ray developing function |
| CN111939328A (en) * | 2020-08-18 | 2020-11-17 | 西安乐析医疗科技有限公司 | Novel peritoneal dialysis tube and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3265092A (en) * | 1965-04-13 | 1966-08-09 | Pennsylvania Fluorocarbon Comp | Fep-fluorocarbon tubing |
| WO1982000413A1 (en) * | 1980-07-28 | 1982-02-18 | Lab Abbott | Improved radiopaque medical tubing |
| US4381008A (en) * | 1978-09-08 | 1983-04-26 | Johnson & Johnson | Methods of improving surface characteristics of extruded thermoplastic tubing and products produced thereby |
| JP2005218602A (en) * | 2004-02-05 | 2005-08-18 | Nichias Corp | Production method of tube containing contrast medium |
| US20110264080A1 (en) * | 2010-04-23 | 2011-10-27 | Sukgyung AT Co., Ltd. | Medical Devices Having Extremely High Radiopacity Containing Ytterbium Compound |
-
2013
- 2013-10-23 CN CN201310502491.5A patent/CN103497463B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3265092A (en) * | 1965-04-13 | 1966-08-09 | Pennsylvania Fluorocarbon Comp | Fep-fluorocarbon tubing |
| US4381008A (en) * | 1978-09-08 | 1983-04-26 | Johnson & Johnson | Methods of improving surface characteristics of extruded thermoplastic tubing and products produced thereby |
| WO1982000413A1 (en) * | 1980-07-28 | 1982-02-18 | Lab Abbott | Improved radiopaque medical tubing |
| JP2005218602A (en) * | 2004-02-05 | 2005-08-18 | Nichias Corp | Production method of tube containing contrast medium |
| US20110264080A1 (en) * | 2010-04-23 | 2011-10-27 | Sukgyung AT Co., Ltd. | Medical Devices Having Extremely High Radiopacity Containing Ytterbium Compound |
Non-Patent Citations (2)
| Title |
|---|
| 李琼芬: "《高分子材料学概论》", 31 December 1986, article "高分子材料学概论", pages: 385-386 * |
| 韩长日 等: "《精细化工工艺学》", 31 August 2011, article "精细化工工艺学", pages: 241-243 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107501655A (en) * | 2017-09-12 | 2017-12-22 | 天津鹏翎胶管股份有限公司 | It is bonded the preparation of the exploitation of high acrylonitrile nitrile rubber formula of FEP resins and products thereof oil filling pipe |
| CN108276638A (en) * | 2017-12-29 | 2018-07-13 | 深圳职业技术学院 | A kind of tubing and preparation method thereof with X-ray developing function |
| CN111939328A (en) * | 2020-08-18 | 2020-11-17 | 西安乐析医疗科技有限公司 | Novel peritoneal dialysis tube and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103497463B (en) | 2015-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108410147B (en) | 3D printing wire prepared from polylactic acid reclaimed material and preparation method | |
| CN104693696B (en) | Modified polybutylene telephthalate material and preparation method thereof | |
| CN103275448B (en) | Preparation method of modified packing ion enhanced polytetrafluoroethylene composite | |
| CN103232685B (en) | Low mold deposit, the high-load glass fiber reinforced materials of excellent surface quality and preparation method | |
| CN103497463B (en) | The FEP conduit that a kind of barium sulfate is filling-modified | |
| CN108424605B (en) | Polyether-ether-ketone 3D printing material and 3D printing forming method thereof | |
| CN105419294A (en) | Wide angle bending-resistant low-fiber emergency reinforced PC/PBT alloy material and preparation method thereof | |
| CN104629324A (en) | High-strength toughened functionalized PC/ABS alloy material | |
| CN109722025A (en) | A kind of polyether sulphone composite material and its application | |
| WO2022095364A1 (en) | Polyester alloy composition, preparation method therefor and use thereof | |
| CN102311623B (en) | High temperature resistance polycarbonate composite material and preparation method thereof | |
| CN104559107A (en) | Glass fiber reinforced polycarbonate composite material and preparation method thereof | |
| CN101696302A (en) | Self-lubricating polypropylene compound material for manufacturing medical injectors | |
| CN111500014B (en) | Polyether-ether-ketone composite material and preparation method thereof | |
| JPS58176242A (en) | Resin composition | |
| CN106810840B (en) | A kind of novel low stress PC composition | |
| CN103304955B (en) | High-lubrication low-shrinkage polyformaldehyde composition and preparation method thereof | |
| CN107541011A (en) | A kind of high-performance polyether-ether-ketone composite material formula and preparation method thereof | |
| CN104341712B (en) | Halogen low warpage high temperature resistant polyformaldehyde composite material of type and preparation method thereof | |
| CN104693725A (en) | Reinforced low-temperature-resistant PC/PET alloy and preparation method thereof | |
| CN114395242A (en) | High-thermal-conductivity POK composite material and preparation method and application thereof | |
| CN105647150A (en) | Preparation method of polypropylene-carbonate-base composite material | |
| CN108530821B (en) | High-hardness waterproof ABS resin and preparation method thereof | |
| CN109971066A (en) | Infrared barrier fluoro-containing composition, preparation method and applications | |
| CN104877223A (en) | Composite enhancing high density polyethylene material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Beijing Plastics Research Institute, No. 47, Jiugulou Street, Xicheng District, Beijing, 100009 Patentee after: Beijing Plastics Research Institute Co.,Ltd. Address before: Beijing Plastics Research Institute, No. 47, Jiugulou Street, Xicheng District, Beijing, 100009 Patentee before: BEIJING PLASTICS Research Institute |