buy Zinc Oxide

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Messages : 10
Enregistré le : 27 nov. 2019 04:42

buy Zinc Oxide

Message par astao199 » 27 nov. 2019 05:13

Appearance (visual inspection):White granuleAssay Content %95-98
Cd Content%<0.025 Loss on drying %1-4
Pb Content%<0.01Cu Content%<0.001
Fe Content%<0.006
production method
To low-grade zinc oxide or zinc ore and zinc raw material, the use of sulfuric acid in the PH value of 5.4 under the condition of leaching and removing impurities, the refined zinc sulfate solution, into the sodium percarbonate zinc carbonate precipitation, the latter calcining under the high temperature of 120-140 ℃ after washing ,and get the active zinc oxide.
Active Zinc Oxide is White hexagon crystal or powder. Melting point is 1,975 ℃ (5.2MPa).When heat up to 1,800 ℃,it will be sublimations. The appearance assumes yellow in high temperature, and restores the white when it is cold. The relative density is 5.47-5.67. The refractive index is 2.0041.It is soluble the alkaline metal hydroxide, the acid, the ammonia water, the ammonium sulfate and the ammonium chloride solution, insoluble in the water and the ethanol. It can absorb the carbon dioxide and the water in the air. Active Zinc Oxide does not have smelly and non-toxic.
This mainly serves the natural rubber, the synthetic rubber and the latex as vulcanization agent ingredient in the rubber industry, both can speed up the curing speed, and can enhance the degree of vulcanization. Next, the Active Zinc Oxide may serve as makes up the potentiate agent and the colorant agent, also may serve as the neoprene vulcanizing agent.

Handling and Storage recommendations
Avoid contact with skin and eyes. Keep container dry. Keep in a cool place. Avoid direct sunshine. Product slowly degrades on storage particularly under warm ,humid conditions .Keep stock below 40℃.
Packing and shipping
Bag: 25kg/bag
Pallet: 800kg
Delivery time: within 7days after receiving advance Zinc Oxide
Introduction of PVDF Resin for Extrusion PVDF FR907
PVDF has excellent weather resistance, ultraviolet resistance, and can be used outdoors for a long time without maintenance. PVD F based on Kynar Coated on building components such as galvanized iron plates, aluminum plates or aluminum profiles, it can be used for more than 20 years and is widely used in power stations, airports, highways, high-rise buildings, etc., and can be modified by blending with other resins, for example, The composites made with ABS resin not only retain their own characteristics, but also have good weathering and processability. They can be widely used in construction, interior and exterior decoration of vehicles, home appliances shell and roof balcony decoration, etc.
Property Unit Values Test Method
Specific Gravity /1.77-1.79ASTM D792,@23/23°C
Melting Point °C164-172ASTM D3418,10°C/MIN
Melt Flow Index g/10min10.0-25.0ASTM D1238,230°C/12.5kg
Water Absorption %≤0.05ASTM D570
Tensile Yield Strength Mpa≥40
ASTM D638,50MM/MIN@23°C
Elongation at Yield %≥10
Tensile Break Strength Mpa≥40
Elongation at Break %≥20
Hardness Shore D74-80ASTM D2240
The melting point (170) of the PVDF resin and the decomposition temperature (316) are quite different. The thermal stability is good and the processing is easy to be processed. However, the characteristics of the poor thermal conductivity of the PVDF resin melt, the higher viscosity and the decrease of the viscosity with the increase of shear stress should be considered.
The PVDF resin can be processed by the processing method of general thermoplastics. The specific conditions are as follows.
1 Casting
The casting PVDF resin film can be prepared by using two methyl acetamide as solvent and adding a solution containing a solid content of 20% on aluminum foil. After hot melt of 200~ 300 and fast water cooling, the casting of casting PVDF resin can be made.
The dispersing liquid of PVDF resin can also be sprayed. The products that need to be sprayed are heated to about 250 after surface treatment, spraying with a spray gun evenly, the pressure of the tank is 0.01 MPa, the air pressure of the spray gun is 0.1MP a, the spraying speed is 100 gPVDF per minute, and the sprayed products are heated by 30 m in at 120, and then added under 240~ 250. After 20 m in, a 20~ 40 m thick and smooth PVDF resin coating was formed.
2 Polarization
1 layers of metal film are evaporated by vacuum coating on both sides of the stretched PVDF resin film as electrodes. The commonly used metal has aluminum, copper and silver. The thickness of the coating is about 0.1 M. The polarization temperature is 80~ 100, the polarization field is 500 kV / cm, and the polarization time is 30~ 60 m in, and the piezoelectricity can be obtained. Good PVDF film.
Meanwhile, we let you know our more PVDF materials as below:
PVDF Materials:
1.PVDF-FR904 resin for film production
2.PVDF-FR905 resin for Lithium Battery
3.PVDF-FR903 resin for Compression Molding (Fishing Line)
4.PVDF-FR906 resin for Injection
5:PVDF-FR907 resin for Extrusion(Fishing Line)China PVDF suppliers