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Product Description

100 pure zinc oxide

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100 pure Zinc oxide has anti-oxidation and promotion effects in EVA, which is to enhance the activity of vulcanization accelerators, enhance the thermal conductivity of rubber, reduce the decomposition temperature of foaming agents, and foaming aids.

Product name	Zinc oxide	Molecular formula	ZnO
CAS NO	1314-13-2	EINECS NO	215-222-5
Density	5.606g/cm3	Molecular weight	81.38
Melting point	1975℃	Boiling Point:	2360ºC
Purity	0.99	Active substance content	0.997
H.S CODE	2817001000	Appearance	White powder or crystal

The mechanism of 100 pure zinc oxide as a foaming accelerator:

100 pure Zinc oxide plays a role in helping foaming in EVA, which is helpful for the adhesion and foaming of EVA. The decomposition temperature of pure AC foaming agent is between 180-220. This decomposition temperature is relatively high for some products, so it is necessary to add a foaming agent. 100 pure Zinc oxide is a commonly used foam promoter.

1) The peripheral electron arrangement of the zinc ion of 100 pure zinc oxide has an empty orbital, and the molecular structure of the AC blowing agent has a lone pair of electrons for nitrogen and oxygen. The cloud concentration flows to both sides, and the degree of overlap in the middle is reduced, causing the -NC- bond to be easily broken, which makes the AC activation and decomposition.

2) The cyanic acid formed by the decomposition of AC blowing agent is easy to form a viscous and firm metal complex on the surface of the mold, which shortens the mold removal cycle, while 100 pure zinc oxide can reduce scaling and prolong the mold removal cycle.

Standard:《GB/T3185-2016》
Item	Type1	Type2	Type3
Zinc oxide（Zn0 calculating as dry materia)%≥	99.7	99.7	99.5
Metal content（as Zn)%≤	none	none	0.008
Insoluble Matter in Hci % ≤	0.006	0.008	0.03
Loss on ignition %≤	0.2	0.2	0.25
Residue on sieve (45um)%≤	0.1	0.15	0.2
Water soluble matter %≤	0.1	0.1	0.15
Volatile matter in 105℃%≤	0.3	0.4	0.5
Lead(pb）%≤	0.008	0.05	0.1
Copper(Cu)% ≤	0.0002	0.0004	0.0007
Manganese（Mn）%	0.0001	0.0001	0.0003
Cadmium (Cd）%	0.002	0.005	0.01
Iron (Fe）%	0.005	0.01	—

The application of 100 pure zinc oxide in EVA products:

EVA products generally use 100 pure zinc oxide with a zinc content of 99.7%, and some medical uses nano-zinc oxide. EVA products include: eva floor mats-foam floor mats for children, as well as yoga mats, moisture-proof mats, etc.; eva insulated pipe covers-used to prevent water pipes from bursting in winter; other products include refrigerator ducts and gas Pipes, civil construction plates, containers and daily necessities, etc., can also be used to make packaging films, gaskets, medical equipment, and can also be used as hot melt adhesives, cable insulation layers, etc.