Name: Anti-Blocking Silica ABS-5 (D50=5 µm)
Brand: Coatingsink
SKU: anti-blocking-silica-abs5
Availability: InStock

Question 1

What loading level of ABS-5 is recommended in overprint varnishes?

Accepted Answer

For waterborne overprint varnishes and solvent-based OPVs, a loading of 0.5–1.5% by weight on total formulation is typically sufficient to prevent film-to-film blocking. In polyolefin packaging films requiring higher slip, dosages up to 2.0% may be used. Pre-dispersing in a small amount of water or solvent before addition ensures uniform distribution and avoids agglomeration.

Question 2

Does ABS-5 significantly reduce gloss in high-gloss coating systems?

Accepted Answer

The 5 µm D50 particle size is optimized to balance anti-blocking performance with gloss retention. At the recommended 0.5–1.5% dosage, 60° gloss reduction is typically less than 5 GU versus the unmodified baseline. For ultra-high-gloss applications, reducing loading to 0.5% or selecting a finer silica grade minimizes the optical impact further.

Question 3

Is Anti-Blocking Silica ABS-5 suitable for food-contact packaging applications?

Accepted Answer

Yes. ABS-5 is manufactured from synthetic amorphous silica and complies with FDA 21 CFR 175.300 (resinous and polymeric coatings) and 21 CFR 178.3297 (silica), making it suitable for indirect food-contact packaging coatings and films. Full regulatory documentation is available upon request.

SiO2 Content	≥99%
Oil Absorption	180–220 g/100 g
Particle Size D50	5 µm
Recommended Dosage	0.5–2.0%
Moisture (105°C, 2 h)	≤6%
pH (10% slurry, 25°C)	6.0–8.0

Anti-Blocking Silica ABS-5 (D50=5 µm)

Specifications

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