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HK-111ABS Wollastonite Powder as Alternative to Asbestos

Description:

Because of the acicular property, low thermal expansion performance and excellent thermal impact resistance of wollastonite, it is an ideal alternative material to asbestos, the amount in this field accounts for 20% to 25% of the world's total consumption of wollastonite.

The friction materials that are produced by wollastonite instead of part of asbestos, which has high friction coefficient, is mainly used in brake pads, valve plugs, automobile clutches and other fields.

Some studies have shown that the brake patches formulated by acicular wollastonite powder partly instead of asbestos have good comprehensive performances, the friction coefficient is stable under 300 ℃, and its heat fading is not obvious, friction loss rate is smaller.

Our advantages:

1. lower Fe content

2. Lower loss on ignition (LOI)

3. Fewer surface defects

4. Improved shrinkage control

5. Higher impact strength

6. Faster drying times

7. higher whiteness

Parameters:

Short-acicular Wollastonite Powder	Class-1	Class-2	Class-3
CaO	43%min	30%min	20%min
SiO2	49%min	57%min	60%min
MgO	1.5%max	1.5%max	1.5%max
Fe2O3	0.5%max	0.5%max	1.5%max
LOI	1.5%max	2-4%	5%max
Whiteness	88-91	85-88	60min
Size	200mesh, 325mesh, micropowder, others
Packaging	Jumbo bag; 100kg bag; 50kg bag; 25kg bag; or customized

Acicular Wollastonite Powder	WFA90	WFA80	WFA70	WFA60
SiO2	49%min	49%min	49%min	49%min
CaO	44-48%	44-48%	44-48%	41-46%
Fe2O3	0.6%max	0.6%max	0.6%max	0.6%max
MgO	1.5%max	1.5%max	1.5%max	1.5%max
LOI	1.5%max	2-4%	2-4%	7%max
Aspect Ratio	about 1:20	1:15min	1:15min	1:10min

Other information:

Packaging Details: According to customer's requirement.(25kgs/bag,50kgs/bag or 1mt/bag, etc.)