CN101722689A - Micro-foamed composite board and manufacturing method thereof - Google Patents
Micro-foamed composite board and manufacturing method thereof Download PDFInfo
- Publication number
- CN101722689A CN101722689A CN200910191840A CN200910191840A CN101722689A CN 101722689 A CN101722689 A CN 101722689A CN 200910191840 A CN200910191840 A CN 200910191840A CN 200910191840 A CN200910191840 A CN 200910191840A CN 101722689 A CN101722689 A CN 101722689A
- Authority
- CN
- China
- Prior art keywords
- micro
- polypropylene
- composite board
- vinyl
- board
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92809—Particular value claimed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a micro-foamed composite board and a manufacturing method thereof. The composite board consists of a micro-foamed board and a non-woven fabric compounded on the micro-foamed board. The micro-foamed board is prepared from the following raw materials in percentage by weight: 66 to 70.5 percent of polypropylene, 3 to 4 percent of toughened modifier, 0.2 to 0.5 percent of foaming agent, and 25.5 to 30 percent of filler. The manufacturing method for the micro-foamed composite board comprises the following steps: firstly, adding the toughened modifier to the polypropylene for mixing and pelleting; then, adding the foaming agent and the filler for mixing and foaming; and finally extruding the board. By adding the toughened modifier, the foaming agent and the filler into the polypropylene, the toughness and the impact resistance of the polypropylene are improved, and the heat resistance of the product is improved. By melting at high temperature and foam molding through a foaming screw machine, the lowest intensity of the composite board can reach 0.45g/cm<3>. Due to the adoption of recovered polypropylene, the cost of the raw materials can be reduced by 20 to 30 percent. The micro-foamed composite board has the advantages of excellent product performance and great reduction of the production cost.
Description
Technical field
The present invention relates to a kind of micro-foamed composite board, particularly a kind of automotive upholstery micro-foamed composite board and manufacture method thereof.
Background technology
The patent No. is that the Chinese patent of ZL200510057315.0 discloses a kind of polypropylene foamed sheet and non-woven fabric compounded manufacture method.This patent products obtained therefrom is to be primary raw material with the polypropylene, adds Ac blowing agent and carbonic acid silicon and makes little foam sheet, again with the non-woven fabric compounded composite plate of making.During the raw material of this composite plate was formed, polyacrylic weight ratio was 70～80, because polypropylene costs an arm and a leg, so the production cost height causes the price of composite plate also high, had therefore limited its use.
The described preparation method of this patent is directly to drop into polypropylene, Ac blowing agent and carbonic acid silicon in the extruding machine, extrude little foam sheet through foaming, though this manufacture method technology is simple, there are shortcomings such as poor toughness, shock resistance is strong, the heat-resistant deforming temperature is low in the composite plate of making.
Summary of the invention
The objective of the invention is to disclose a kind of micro-foamed composite board, this composite plate good toughness, strong, the heat-resistant deforming temperature height of shock resistance.
Another object of the present invention is the manufacture method that discloses above-mentioned micro-foamed composite board, this manufacture method good mixing effect, frothing percentage height.
The object of the present invention is achieved like this: a kind of micro-foamed composite board, constitute by little foaming plate and the nonwoven that is compounded in above little foaming plate, described little foaming plate is to be made by following raw material: polypropylene 66～70.5%, plasticized modifier: vinyl-vinyl acetate copolymer and ethylene propylene diene rubber 3～4%, blowing agent: Celogen Az 0.2～0.5%, filler: calcium carbonate 25.5～30%, by weight percentage.
The raw material of described little foaming plate and the weight percentage of various raw materials are preferably and are polypropylene 66%, vinyl-vinyl acetate copolymer and ethylene propylene diene rubber 3.8%, Celogen Az 0.2%, calcium carbonate 30%.
The manufacture method of described little foaming plate is: add plasticized modifier mixing, fusion, granulation earlier in polypropylene, add blowing agent and filler mixing, fusion, foaming then, extrusion board.
Described vinyl-vinyl acetate copolymer and ethylene propylene diene rubber mix use with 2: 3 weight ratio.
Described calcium carbonate granularity is 1250 orders.
Another object of the present invention is the manufacture method of above-mentioned micro-foamed composite board, constitute by little foaming plate and the nonwoven that is compounded in above little foaming plate, described little foaming plate weight percentages raw materials used and various raw materials are polypropylene 66～70.5%, vinyl-vinyl acetate copolymer and ethylene propylene diene rubber 3～4%, Celogen Az 0.2～0.5%, calcium carbonate 25.5～30%, and its manufacturing step is as follows:
A) take by weighing polypropylene and vinyl-vinyl acetate copolymer and ethylene propylene diene rubber according to above-mentioned weight percentage and add mixing in the comminutor, fusion, granulation;
B) take by weighing blowing agent and filler according to above-mentioned weight percentage and add the mixing of foaming screw rod machine, fusion, the foaming that has blown foam die, extrusion board with the material of step a) granulation;
C) the step b) sheet material and the nonwoven hot pressing of extruding is compound, and cooling makes composite plate.
Above-mentioned steps a) in, the temperature of comminutor is 190 ℃～200 ℃.
Above-mentioned steps b) in, the extruder temperature of screw rod machine is 200 ℃～210 ℃, and screw speed is 70 commentaries on classics/min, and the blown foam die temperature is 190 ℃～200 ℃.
Above-mentioned steps c) in, sheet material is through the two-sided or single face and non-woven fabric compounded of three Kun machine hot pressing.
In the above-mentioned manufacturing step from c) to e) for the automation continuous processing, little foaming plate of extruding from blown foam die directly enters three Kun machines, the high temperature that utilizes self does not need to smear adhesive through three Kun machine hot pressing and non-woven fabric compounded.
In order further to reduce cost, above-mentioned polypropylene can be used recovery article.
Above-mentioned vinyl-vinyl acetate copolymer and ethylene propylene diene rubber are plasticized modifier, mix with 2: 3 weight ratios and use.
The present invention has following beneficial effect: the present invention is by adding plasticized modifier, blowing agent and filler in polypropylene, polyacrylic toughness and impact resistance have been improved, improved the heat-resisting sex change energy of product, through foaming screw rod machine high-temperature fusion, foaming, the composite plate least density can reach 0.45g/cm
3Hot strength 〉=13.65Mpa, high temperature size changing rate≤± 0.34%, low temperature size changing rate≤± 0.20%, the heat-resistant deforming temperature is up to more than 90 ℃, 100 abrasion loss that rub are 15.3mg, and oder levels is 3 grades, and thickness is 1.0mm～10.0mm, adopt the polypropylene that reclaims, the cost of raw material can reduce by 20～30%, and not only properties of product are good, and production cost has had reduction significantly.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is a process chart of the present invention;
Fig. 2 is an automation continuous processing schematic diagram of the present invention.
The specific embodiment
Embodiment 1: a kind of micro-foamed composite board, be made of little foaming plate and the nonwoven that is compounded in above the sheet material, the raw material of described little foaming plate and the weight percentage of various raw materials are polypropylene 66%, vinyl-vinyl acetate copolymer 1.52%, ethylene propylene diene rubber 2.28%, Celogen Az 0.2%, calcium carbonate 30%.
Above-mentioned polypropylene is that the trade mark is the recovery article of T30S, pulverizes earlier before the use.
Its manufacture method is referring to Fig. 1, Fig. 2, and concrete manufacturing step is as follows:
A, take by weighing polypropylene, vinyl-vinyl acetate copolymer and ethylene propylene diene rubber, put into mixer and mix, then this compound is added temperature and be in 200 ℃ the dual-screw pelletizer, obtain the material of granulation according to above-mentioned weight percentage;
Add Celogen Az and calcium carbonate in the material of b, granulation, the feeding port 1 that adds the foaming screw rod machine 2 that has blown foam die, screw rod 3 temperature are 200 ℃, screw rod 3 rotating speeds are 70 commentaries on classics/min, be mixed into the blown foam die 4 of foaming screw rod machine end through screw rod 3, blown foam die 4 temperature are 190 ℃, extrude little foaming plate from blown foam die 4;
C, little foaming plate of extruding directly enter three Kun machines 6, and through the two-sided compound nonwoven cloth 5 of three Kun machines, 6 hot pressing, three-roller 6 hauling speeds are 4M/min.
The composite plate of d, compound nonwoven cloth is through coldplate 7, drawn to automatic cutting off table 9 by draw-gear 8 and cuts out.
Embodiment 2: a kind of micro-foamed composite board, constitute by little foaming plate and the nonwoven that is compounded in above little foaming plate, the raw material of described little foaming plate and the weight percentage of various raw materials are: polypropylene 70.5%, vinyl-vinyl acetate copolymer 1.2%, ethylene propylene diene rubber 1.8%, Celogen Az 0.3%, calcium carbonate 26.2%;
Above-mentioned polypropylene is commercially available plain polypropylene.
Its manufacturing step is with embodiment 1, and difference is that the dual-screw pelletizer temperature is 190 ℃, and the extruder temperature of foaming screw rod machine is that 210 ℃, blown foam die temperature are 200 ℃.
Claims (10)
1. micro-foamed composite board, constitute by little foaming plate and the nonwoven that is compounded in above little foaming plate, it is characterized in that: described little foaming plate is to be made by following raw material: polypropylene 66～70.5%, plasticized modifier: vinyl-vinyl acetate copolymer and ethylene propylene diene rubber 3～4%, blowing agent: Celogen Az 0.2～0.5%, filler: calcium carbonate 25.5～30%, by weight percentage.
2. micro-foamed composite board as claimed in claim 1, it is characterized in that: the raw material of described little foaming plate and the weight percentage of various raw materials are polypropylene 66%, vinyl-vinyl acetate copolymer and ethylene propylene diene rubber 3.8%, Celogen Az 0.2%, calcium carbonate 30%.
3. micro-foamed composite board as claimed in claim 1 or 2, it is characterized in that, the manufacture method of described little foaming plate is: add plasticized modifier mixing, fusion, granulation earlier in polypropylene, add blowing agent and filler mixing, fusion, foaming then, extrusion board.
4. micro-foamed composite board as claimed in claim 1 or 2 is characterized in that: vinyl-vinyl acetate copolymer and ethylene propylene diene rubber mix with 2: 3 weight ratio, and described calcium carbonate granularity is 1250 orders.
5. micro-foamed composite board as claimed in claim 3 is characterized in that: it is characterized in that: vinyl-vinyl acetate copolymer and ethylene propylene diene rubber mix with 2: 3 weight ratio, and described calcium carbonate granularity is 1250 orders.
6. as the manufacture method of each described micro-foamed composite board of claim 1～5, constitute by little foaming plate and the nonwoven that is compounded in above little foaming plate, described little foaming plate weight percentages raw materials used and various raw materials are polypropylene 66～70.5%, vinyl-vinyl acetate copolymer and ethylene propylene diene rubber 3～4%, Celogen Az 0.2～0.5%, calcium carbonate 25.5～30%, and its manufacturing step is as follows:
A) take by weighing polypropylene and vinyl-vinyl acetate copolymer and ethylene propylene diene rubber according to above-mentioned weight percentage and add mixing in the comminutor, fusion, granulation;
B) take by weighing blowing agent and filler according to above-mentioned weight percentage and add the mixing of foaming screw rod machine, fusion, the foaming that has blown foam die, extrusion board with the material of step a) granulation;
C) the step b) sheet material and the nonwoven hot pressing of extruding is compound, and cooling makes composite plate.
7. manufacture method as claimed in claim 6 is characterized in that, in the step a), the temperature of comminutor is 190 ℃～200 ℃.
8. manufacture method as claimed in claim 6 is characterized in that, in the step b), the extruder temperature of screw rod machine is 200 ℃～210 ℃, and screw speed is 70 commentaries on classics/min, and the blown foam die temperature is 190 ℃～200 ℃.
9. as claim 6,7 or 8 described manufacture methods, it is characterized in that in the step c), described sheet material is through three Kun machines and nonwoven hot pressing is two-sided or single face is compound.
10. as claim 6,7 or 8 described manufacture methods, it is characterized in that described polypropylene is a recovery article.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910191840A CN101722689B (en) | 2009-12-10 | 2009-12-10 | Micro-foamed composite board and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910191840A CN101722689B (en) | 2009-12-10 | 2009-12-10 | Micro-foamed composite board and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101722689A true CN101722689A (en) | 2010-06-09 |
| CN101722689B CN101722689B (en) | 2012-09-19 |
Family
ID=42444504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910191840A Expired - Fee Related CN101722689B (en) | 2009-12-10 | 2009-12-10 | Micro-foamed composite board and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101722689B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504426A (en) * | 2011-10-26 | 2012-06-20 | 重庆巨翁塑料制造有限公司 | Foamed polypropylene composite board and preparation method thereof |
| CN102702560A (en) * | 2012-06-26 | 2012-10-03 | 重庆鸿岱科技有限公司 | Compound foaming manufacturing method for polypropylene foaming material |
| CN103434240A (en) * | 2013-09-03 | 2013-12-11 | 徐晓冰 | Polypropylene physical foaming composite board and manufacturing process thereof |
| CN103509245A (en) * | 2013-09-18 | 2014-01-15 | 湖北南泽汽车复合材料有限公司 | Production method of one-step method polypropylene foam material |
| CN103756154A (en) * | 2014-01-22 | 2014-04-30 | 深圳市科聚新材料有限公司 | Polypropylene composite and preparation method thereof |
| CN104262779A (en) * | 2014-09-15 | 2015-01-07 | 武汉理工大学 | Method for recycling retired car polyolefin plastic parts and components by virtue of chemical foaming |
| CN106738580A (en) * | 2017-01-22 | 2017-05-31 | 合肥华凌股份有限公司 | The processing method and foaming plate of foaming plate |
| CN112428554A (en) * | 2020-10-29 | 2021-03-02 | 青海百能汇通新能源科技有限公司 | Carbon felt composite battery pole plate and production method thereof, carbon felt composite calendering equipment and flow battery |
-
2009
- 2009-12-10 CN CN200910191840A patent/CN101722689B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504426A (en) * | 2011-10-26 | 2012-06-20 | 重庆巨翁塑料制造有限公司 | Foamed polypropylene composite board and preparation method thereof |
| CN102702560A (en) * | 2012-06-26 | 2012-10-03 | 重庆鸿岱科技有限公司 | Compound foaming manufacturing method for polypropylene foaming material |
| CN102702560B (en) * | 2012-06-26 | 2014-01-01 | 重庆鸿岱科技有限公司 | Compound foaming manufacturing method for polypropylene foaming material |
| CN103434240A (en) * | 2013-09-03 | 2013-12-11 | 徐晓冰 | Polypropylene physical foaming composite board and manufacturing process thereof |
| CN103434240B (en) * | 2013-09-03 | 2016-02-24 | 徐晓冰 | A kind of polypropylene physical blowing composite plate and manufacturing process thereof |
| CN103509245A (en) * | 2013-09-18 | 2014-01-15 | 湖北南泽汽车复合材料有限公司 | Production method of one-step method polypropylene foam material |
| CN103509245B (en) * | 2013-09-18 | 2014-12-03 | 湖北南泽汽车复合材料有限公司 | Production method of one-step method polypropylene foam material |
| CN103756154A (en) * | 2014-01-22 | 2014-04-30 | 深圳市科聚新材料有限公司 | Polypropylene composite and preparation method thereof |
| CN104262779A (en) * | 2014-09-15 | 2015-01-07 | 武汉理工大学 | Method for recycling retired car polyolefin plastic parts and components by virtue of chemical foaming |
| CN106738580A (en) * | 2017-01-22 | 2017-05-31 | 合肥华凌股份有限公司 | The processing method and foaming plate of foaming plate |
| CN112428554A (en) * | 2020-10-29 | 2021-03-02 | 青海百能汇通新能源科技有限公司 | Carbon felt composite battery pole plate and production method thereof, carbon felt composite calendering equipment and flow battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101722689B (en) | 2012-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101722689B (en) | Micro-foamed composite board and manufacturing method thereof | |
| CN102585465B (en) | Hollow microsphere reinforced polylactic acid (PLA)-based composite foaming material and preparation method thereof | |
| CN102060564B (en) | Light-weight environmental-friendly stone paper and preparation method thereof | |
| CN110273299B (en) | Polyvinyl alcohol non-woven fabric and preparation method thereof | |
| CN103102583B (en) | A kind of polypropylene microporous expanded material and preparation method thereof | |
| CN105131501B (en) | A kind of foaming master batch for ABS microcellular foam materials and preparation method thereof | |
| CN102675842A (en) | Polylactic acid foamed material and preparation method thereof | |
| CN102391598A (en) | Polyvinyl alcohol material and production method thereof | |
| CN102504426A (en) | Foamed polypropylene composite board and preparation method thereof | |
| CN101575910A (en) | Complex architectural template and preparation method thereof | |
| CN103756124A (en) | Polypropylene foaming material, production and preparation method of product | |
| CN106380742A (en) | PVC (Polyvinyl Chloride) microcrystalline wood composite material and preparation method thereof | |
| CN101550755B (en) | Wood-plastic microcellular foamed anion ecological floor and process for producing same | |
| CN102241855A (en) | Foamed material prepared from nano-calcium-carbonate-filled polypropylene/polyethylene blend and preparation process thereof | |
| CN103434240B (en) | A kind of polypropylene physical blowing composite plate and manufacturing process thereof | |
| CN105602114A (en) | Polypropylene foamed composite board and manufacturing method thereof | |
| CN110016213B (en) | Polylactic acid foaming material with micro-nano composite pores and preparation method thereof | |
| CN102604205B (en) | Novel environment-friendly composite reinforced polypropylene building template | |
| CN105694206A (en) | Method for producing long-glass-fiber-reinforced polypropylene foaming injection product by using water as foaming agent | |
| CN115627028B (en) | In-situ microfibrillated reinforced polymer composite heat insulation foam material and preparation method and application thereof | |
| CN109265825B (en) | Polypropylene or polypropylene compound foamed product and preparation method thereof | |
| CN110628147A (en) | Modified PVC (polyvinyl chloride) foamed floor mat and preparation method thereof | |
| CN100500407C (en) | Compositely producing method for polypropylene foamed sheet material and non-woven fabric | |
| CN106363892A (en) | Forming method for polyvinyl chloride physical foam board | |
| CN105348688A (en) | Modified-coal-ash plastic foamed composite board and preparation method therefor |
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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20131210 |