CN107141521A - A kind of pressure measuring instruments seal - Google Patents
A kind of pressure measuring instruments seal Download PDFInfo
- Publication number
- CN107141521A CN107141521A CN201710326616.1A CN201710326616A CN107141521A CN 107141521 A CN107141521 A CN 107141521A CN 201710326616 A CN201710326616 A CN 201710326616A CN 107141521 A CN107141521 A CN 107141521A
- Authority
- CN
- China
- Prior art keywords
- parts
- pressure measuring
- measuring instruments
- weight
- hydrotalcite
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- 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
Abstract
The invention discloses a kind of pressure measuring instruments seal, its raw material includes by weight：90 110 parts of base material, 58 parts of plasticizer, 0.5 0.9 parts of magnesia, 12 parts of zinc oxide, 12 16 parts of nano diatomite, 15 25 parts of nanomete talc powder, 20 30 parts of carbon fiber, 55 75 parts of hydrotalcite composite montmorillonoid, 24 parts of accelerator CZ, 24 parts of cumyl peroxide, 1.5 2.5 parts of antioxidant 4010NA, 1.5 2.5 parts of antioxidant 2246.Pressure measuring instruments seal proposed by the present invention, formula is reasonable, cost is low, and with good isolation and anti seismic efficiency, ageing-resistant, good seal performance, will not have an impact to pressure calibration, and measurement application life is long.
Description
Technical field
The present invention relates to instrument seal technical field, more particularly to a kind of pressure measuring instruments seal.
Background technology
In pressure measuring instruments, impulse medium need to such as be isolated, be isolated frequently with diaphragm pressure teletransmission method,
Remote transmitting diaphragm is connected using capillary again to general between measuring instrumentss, and this usual partial circuit is entered in instrument manufactory
Row vacuumizes and filled medium.If the rubber seal shock resistance that inside is used is poor, easy aging then needs depot repair,
Not only waste time and energy, and maintenance cost is high.
The content of the invention
The technical problem existed based on background technology, the present invention proposes a kind of pressure measuring instruments seal, is formulated
Rationally, cost is low, and with good isolation and anti seismic efficiency, ageing-resistant, good seal performance, will not have an impact to pressure calibration,
Measure application life long.
A kind of pressure measuring instruments seal proposed by the present invention, its raw material includes by weight：90-110 parts of base material,
5-8 parts of plasticizer, 0.5-0.9 parts of magnesia, 1-2 parts of zinc oxide, 12-16 parts of nano diatomite, 15-25 parts of nanomete talc powder,
20-30 parts of carbon fiber, 55-75 parts of hydrotalcite composite montmorillonoid, 2-4 parts of accelerator CZ, 2-4 parts of cumyl peroxide,
1.5-2.5 parts of antioxidant 4010NA, 1.5-2.5 parts of antioxidant 2246.
Preferably, hydrotalcite composite montmorillonoid is prepared using following technique：Montmorillonite, sulfuric acid solution are well mixed, risen
Temperature, stirring is cooled to room temperature, adds water stirring, and filtering is washed with water, and dries to constant weight, crushes, adds hydrotalcite, Ludox
Ultrasonic disperse, adds waterglass continuation stirring and obtains hydrotalcite composite montmorillonoid.
Preferably, hydrotalcite composite montmorillonoid is prepared using following technique：By weight by 10-20 parts of montmorillonites, 50-70
Part concentration is well mixed for 90-94% sulfuric acid solutions, heats up, and stirring is cooled to room temperature, adds 50-70 parts of water and stirs, filtering,
It is washed with water, dries to constant weight, crush, adds the Ludox ultrasound of 30-40 parts of hydrotalcites, 10-16 parts of solid contents for 20-30%
It is scattered, add 1.5-2.5 parts of waterglass continuation stirrings and obtain hydrotalcite composite montmorillonoid.
Preferably, hydrotalcite composite montmorillonoid is prepared using following technique：By weight by 10-20 parts of montmorillonites, 50-70
Part concentration is well mixed for 90-94% sulfuric acid solutions, is warming up to 150-170 DEG C, stirs 1-2h, is cooled to room temperature, adds 50-70
Part water stirring 50-80min, mixing speed is 400-600r/min, filtering, is washed with water, 80-90 DEG C of drying to constant weight, is crushed,
The Ludox ultrasonic disperse 4-8h of 30-40 parts of hydrotalcites, 10-16 parts of solid contents for 20-30% is added, 1.5-2.5 parts of water are added
Glass continues to stir 40-60min, and whipping temp is 70-90 DEG C, obtains hydrotalcite composite montmorillonoid.
Preferably, base material includes by weight：60-80 parts of natural rubber, 10-20 parts of butadiene rubber, butadiene-styrene rubber 15-25
Part.
Preferably, plasticizer includes by weight：4-6 parts of stearic acid, 3-8 parts of epoxy acetyl linolenic acid methyl esters.
The present invention using natural rubber, butadiene-styrene rubber, butadiene rubber as base material, and coordinate addition hydrotalcite composite montmorillonoid,
Nanomete talc powder, nano diatomite, carbon fiber, can increase substantially shockproof, the ageing-resistant performance of the present invention, and have well
Hardness, breaking strength, elongation at break, are unlikely to deform the present invention；And hydrotalcite composite montmorillonoid and natural rubber, butylbenzene rubber
Glue, butadiene rubber are organically combined, and overall cross-linked structure is good, and adhesion is strong, further enhance shockproof, anti-wear performance of the invention,
Further acted on antioxidant 4010NA, antioxidant 2246, ageing-resistant performance is fabulous, and service life increases significantly.
In hydrotalcite composite montmorillonoid, montmorillonite can improve montmorillonite viscosity difference after persulfuric acid acidification, not only
Problem, and specific surface area is big, and pore volume is big, high with hydrotalcite mixability, mobility, good permeability, at Ludox
After reason, stable network structure can be formed, the waterglass melted with activated carbon coordination energy absorbing high temp, not only ageing-resistant,
Acid and alkali-resistance, heat resistance are fabulous, and can prevent its erosion to article periphery annex.
Hydrotalcite composite montmorillonoid, nanomete talc powder, nano diatomite, carbon fiber and epoxy acetyl linolenic acid methyl esters,
Stearic acid is mixed and reasonable control proportioning, can not only strengthen elasticity of the invention, greatly improve anti-wear performance, make the present invention even in
Also higher stability and hardness can be kept under hot conditions.Inventive formulation is reasonable, cost is low, and with good isolation and
Anti seismic efficiency, good seal performance is difficult leakage, will not had an impact to pressure calibration, and measurement application life is long.
Embodiment
Below, technical scheme is described in detail by specific embodiment.
Embodiment 1
A kind of pressure measuring instruments seal proposed by the present invention, its raw material includes by weight：110 parts of base material, increases
Mould 5 parts of agent, 0.9 part of magnesia, 1 part of zinc oxide, 16 parts of nano diatomite, 15 parts of nanomete talc powder, 30 parts of carbon fiber, hydrotalcite
55 parts of composite montmorillonoid, 4 parts of accelerator CZ, 2 parts of cumyl peroxide, 2.5 parts of antioxidant 4010NA, age resistor
2246 1.5 parts.
Embodiment 2
A kind of pressure measuring instruments seal proposed by the present invention, its raw material includes by weight：90 parts of base material, plasticising
8 parts of agent, 0.5 part of magnesia, 2 parts of zinc oxide, 12 parts of nano diatomite, 25 parts of nanomete talc powder, 20 parts of carbon fiber, hydrotalcite is multiple
Close 75 parts of montmorillonite, 2 parts of accelerator CZ, 4 parts of cumyl peroxide, 1.5 parts of antioxidant 4010NA, antioxidant 2246
2.5 part.
Hydrotalcite composite montmorillonoid is prepared using following technique：Montmorillonite, sulfuric acid solution are well mixed, heated up, stirring,
Room temperature is cooled to, water stirring is added, filtering is washed with water, and dries to constant weight, crushes, hydrotalcite, Ludox ultrasound point is added
Dissipate, add waterglass continuation stirring and obtain hydrotalcite composite montmorillonoid.
Embodiment 3
A kind of pressure measuring instruments seal proposed by the present invention, its raw material includes by weight：95 parts of base material, plasticising
7 parts of agent, 0.6 part of magnesia, 1.8 parts of zinc oxide, 13 parts of nano diatomite, 22 parts of nanomete talc powder, 22 parts of carbon fiber, hydrotalcite
70 parts of composite montmorillonoid, 2.5 parts of accelerator CZ, 3.5 parts of cumyl peroxide, 1.8 parts of antioxidant 4010NA prevents old
2,246 2.2 parts of agent.
Base material includes by weight：60 parts of natural rubber, 20 parts of butadiene rubber, 15 parts of butadiene-styrene rubber.Plasticizer is by weight
Part includes：6 parts of stearic acid, 3 parts of epoxy acetyl linolenic acid methyl esters.
Hydrotalcite composite montmorillonoid is prepared using following technique：It is 90% by weight by 10 parts of montmorillonites, 70 parts of concentration
Sulfuric acid solution is well mixed, and is warming up to 170 DEG C, stirs 1h, is cooled to room temperature, adds 70 parts of water stirring 50min, and mixing speed is
600r/min, filtering, is washed with water, 80 DEG C of dryings to constant weight, crushes, and it is 30% to add 40 parts of hydrotalcites, 10 parts of solid contents
Ludox ultrasonic disperse 4h, adds 2.5 parts of waterglass and continues to stir 40min, whipping temp is 90 DEG C, obtain the compound illiteracy of hydrotalcite
De- soil.
Embodiment 4
A kind of pressure measuring instruments seal proposed by the present invention, its raw material includes by weight：105 parts of base material, increases
Mould 6 parts of agent, 0.8 part of magnesia, 1.2 parts of zinc oxide, 15 parts of nano diatomite, 18 parts of nanomete talc powder, 28 parts of carbon fiber, neatly
60 parts of stone composite montmorillonoid, 3.5 parts of accelerator CZ, 2.5 parts of cumyl peroxide, 2.2 parts of antioxidant 4010NA is prevented
Old 2,246 1.8 parts of agent.
Base material includes by weight：80 parts of natural rubber, 10 parts of butadiene rubber, 25 parts of butadiene-styrene rubber.Plasticizer is by weight
Part includes：4 parts of stearic acid, 8 parts of epoxy acetyl linolenic acid methyl esters.
Hydrotalcite composite montmorillonoid is prepared using following technique：It is 94% by weight by 20 parts of montmorillonites, 50 parts of concentration
Sulfuric acid solution is well mixed, and is warming up to 150 DEG C, stirs 2h, is cooled to room temperature, adds 50 parts of water stirring 80min, and mixing speed is
400r/min, filtering, is washed with water, 90 DEG C of dryings to constant weight, crushes, and it is 20% to add 30 parts of hydrotalcites, 16 parts of solid contents
Ludox ultrasonic disperse 8h, adds 1.5 parts of waterglass and continues to stir 60min, whipping temp is 70 DEG C, obtain the compound illiteracy of hydrotalcite
De- soil.
Embodiment 5
A kind of pressure measuring instruments seal proposed by the present invention, its raw material includes by weight：100 parts of base material, increases
Mould 6.5 parts of agent, 0.7 part of magnesia, 1.5 parts of zinc oxide, 14 parts of nano diatomite, 20 parts of nanomete talc powder, 25 parts of carbon fiber, water
65 parts of talcum composite montmorillonoid, 3 parts of accelerator CZ, 3 parts of cumyl peroxide, 2 parts of antioxidant 4010NA, age resistor
2246 2 parts.
Base material includes by weight：70 parts of natural rubber, 15 parts of butadiene rubber, 20 parts of butadiene-styrene rubber.Plasticizer is by weight
Part includes：5 parts of stearic acid, 6 parts of epoxy acetyl linolenic acid methyl esters.
Hydrotalcite composite montmorillonoid is prepared using following technique：It is 92% by weight by 15 parts of montmorillonites, 60 parts of concentration
Sulfuric acid solution is well mixed, and is heated up, and stirring is cooled to room temperature, adds 60 parts of water stirrings, and filtering is washed with water, dried to perseverance
Weight, is crushed, and it is 25% Ludox ultrasonic disperse to add 35 parts of hydrotalcites, 13 parts of solid contents, is added 2 parts of waterglass and is continued to stir
Obtain hydrotalcite composite montmorillonoid.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (6)
1. a kind of pressure measuring instruments seal, it is characterised in that its raw material includes by weight：90-110 parts of base material, increases
Mould 5-8 parts of agent, 0.5-0.9 parts of magnesia, 1-2 parts of zinc oxide, 12-16 parts of nano diatomite, 15-25 parts of nanomete talc powder, carbon
20-30 parts of fiber, 55-75 parts of hydrotalcite composite montmorillonoid, 2-4 parts of accelerator CZ, 2-4 parts of cumyl peroxide is prevented
Old 1.5-2.5 parts of agent 4010NA, 1.5-2.5 parts of antioxidant 2246.
2. pressure measuring instruments seal according to claim 1, it is characterised in that hydrotalcite composite montmorillonoid is using such as
It is prepared by lower technique：Montmorillonite, sulfuric acid solution are well mixed, heated up, stirring is cooled to room temperature, water stirring is added, filters, use
Water washing, dries to constant weight, crushes, add hydrotalcite, Ludox ultrasonic disperse, adds waterglass continuation stirring and obtains hydrotalcite
Composite montmorillonoid.
3. pressure measuring instruments seal according to claim 1 or claim 2, it is characterised in that hydrotalcite composite montmorillonoid is adopted
Prepared with following technique：It is that 90-94% sulfuric acid solutions are well mixed by weight by 10-20 parts of montmorillonites, 50-70 parts of concentration,
Heating, stirring is cooled to room temperature, adds 50-70 parts of water stirrings, and filtering is washed with water, and dries to constant weight, crushes, adds 30-
The Ludox ultrasonic disperse that 40 parts of hydrotalcites, 10-16 parts of solid contents are 20-30%, adds 1.5-2.5 parts of waterglass and continues to stir
Obtain hydrotalcite composite montmorillonoid.
4. according to any one of the claim 1-3 pressure measuring instruments seals, it is characterised in that hydrotalcite is compound to cover de-
Soil is prepared using following technique：It is that 90-94% sulfuric acid solutions are mixed by weight by 10-20 parts of montmorillonites, 50-70 parts of concentration
It is even, 150-170 DEG C is warming up to, 1-2h is stirred, room temperature is cooled to, 50-70 parts of water stirring 50-80min are added, mixing speed is
400-600r/min, filtering, is washed with water, 80-90 DEG C of drying to constant weight, crushes, add 30-40 parts of hydrotalcites, 10-16 parts consolidate
Content is 20-30% Ludox ultrasonic disperse 4-8h, adds 1.5-2.5 parts of waterglass and continues to stir 40-60min, stirring temperature
Spend for 70-90 DEG C, obtain hydrotalcite composite montmorillonoid.
5. according to any one of the claim 1-4 pressure measuring instruments seals, it is characterised in that base material is wrapped by weight
Include：60-80 parts of natural rubber, 10-20 parts of butadiene rubber, 15-25 parts of butadiene-styrene rubber.
6. according to any one of the claim 1-5 pressure measuring instruments seals, it is characterised in that plasticizer is by weight
Including：4-6 parts of stearic acid, 3-8 parts of epoxy acetyl linolenic acid methyl esters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710326616.1A CN107141521A (en) | 2017-05-10 | 2017-05-10 | A kind of pressure measuring instruments seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710326616.1A CN107141521A (en) | 2017-05-10 | 2017-05-10 | A kind of pressure measuring instruments seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107141521A true CN107141521A (en) | 2017-09-08 |
Family
ID=59777558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710326616.1A Withdrawn CN107141521A (en) | 2017-05-10 | 2017-05-10 | A kind of pressure measuring instruments seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107141521A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107778824A (en) * | 2017-09-28 | 2018-03-09 | 天长市天利达电子厂 | A kind of impact resistance thin-walled remote controller casing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103694502A (en) * | 2013-11-29 | 2014-04-02 | 马鞍山市中澜橡塑制品有限公司 | Sealing gasket material formed by compounding natural rubber and butadiene rubber and preparation method of sealing gasket material |
| US20140323610A1 (en) * | 2012-02-23 | 2014-10-30 | Beijing University Of Chemical Technology | Method for preparing graphene oxide/white carbon black/rubber nanocomposite material |
| CN105733034A (en) * | 2016-02-18 | 2016-07-06 | 合肥市再德高分子材料有限公司 | High-performance natural rubber/butadiene styrene rubber composite material |
-
2017
- 2017-05-10 CN CN201710326616.1A patent/CN107141521A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140323610A1 (en) * | 2012-02-23 | 2014-10-30 | Beijing University Of Chemical Technology | Method for preparing graphene oxide/white carbon black/rubber nanocomposite material |
| CN103694502A (en) * | 2013-11-29 | 2014-04-02 | 马鞍山市中澜橡塑制品有限公司 | Sealing gasket material formed by compounding natural rubber and butadiene rubber and preparation method of sealing gasket material |
| CN105733034A (en) * | 2016-02-18 | 2016-07-06 | 合肥市再德高分子材料有限公司 | High-performance natural rubber/butadiene styrene rubber composite material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107778824A (en) * | 2017-09-28 | 2018-03-09 | 天长市天利达电子厂 | A kind of impact resistance thin-walled remote controller casing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103236294B (en) | Can porcelain SiClx rubber composite belt | |
| CN102965036B (en) | Nano-wollastonite modified adhesive for packaging | |
| CN108358589A (en) | A kind of water-proof high-intensity weather-resistance flame-retardant environmental protection heat-insulating board and preparation method thereof | |
| CN103739799A (en) | Nano nitrile-butadiene rubber modified phenol formaldehyde resin and preparation method thereof | |
| CN107141521A (en) | A kind of pressure measuring instruments seal | |
| CN107189335A (en) | A kind of computer mouse case material and preparation method thereof | |
| CN105218921A (en) | A kind of Mobile phone screen installation cushioning material | |
| CN101857404A (en) | Light mortar with high performance and low heat conduction | |
| CN106832743A (en) | A kind of preparation method and applications of the plastics electric appliance casing containing biomass | |
| CN106700838A (en) | High wear resistance double-component epoxy coating for power distribution cabinet shell | |
| CN102965050A (en) | Nano-kieselguhr modified adhesive for packaging | |
| CN107163859A (en) | A kind of waterproof material and preparation method thereof | |
| CN107141586A (en) | A kind of ageing-resistant traffic indication board shell elastomeric material | |
| CN106810776A (en) | A kind of modification infusorial earth/chlorinated scoline damp composite material and preparation method thereof | |
| CN106630797A (en) | Heat preservation material and preparation method thereof | |
| CN107163320A (en) | A kind of nitrile rubber flexible pipe glue and preparation method thereof | |
| CN112852387B (en) | Phase change material and preparation method and application thereof | |
| CN104829871B (en) | A kind of White carbon black dispersant and preparation method thereof | |
| CN108395697A (en) | A kind of electrorheological elastomer material and preparation method for 3D printing | |
| CN107141515A (en) | A kind of ornamental gap filler and preparation method thereof | |
| CN103613873A (en) | Modified polystyrene foam | |
| CN107254072A (en) | A kind of preparation method of protective case for electronic product | |
| CN106746902A (en) | Thermal insulation thermal insulation board and preparation method thereof | |
| CN107098659A (en) | A kind of delicate fragrance type fiber-reinforced composite cement board and preparation method thereof | |
| CN107141540A (en) | A kind of bullet train instrument shock absorber part |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170908 |