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SYLOBLOC® 47 is a highly versatile silica antiblocking agent with an intermediate pore volume, large particle size, and great optical properties.
SYLOBLOC® 47 is a synthetic amorphous silica (silicon dioxide) antiblocking agent supplied as a free-flowing powder with an intermediate pore volume and a large particle size. Among the SYLOBLOC® antiblocking additive portfolio, SYLOBLOC® 47 is highly versatile for use in different types of film. It is easily dispersed in single-layer polypropylene (PP) and polyethylene (PE) polymer melts. It also works well in masterbatch- or slurry-processed PET and functions as a matting and surface texturing agent and anti-plate-out processing aid for calendered PVC films and sheets. Despite its relatively large particle size, SYLOBLOC® 47 possesses excellent optical properties that enable it to provide efficient antiblocking performance without compromising the visual quality or clarity of transparent plastic films. As SYLOBLOC® 47 is a manufactured silica, it has a very high inherent degree of purity compared to other antiblocking agents produced by mining. This is primarily responsible for SYLOBLOC® 47's efficiency as an additive. SYLOBLOC® 47 is recommended for plastic films with thicknesses between 20 and 70 µm and helps improve slip on these films. It is typically incorporated into films used for food packaging, but which are also intended for use in a variety of industrial applications.
Moisture at 160°C, % max: 2.0
Average particle size via Malvern Mastersizer, µm: 5.5–6.7
Wet screen residue > 25 µm, max %: 0.01
pH of 5% aqueous suspension: 6.0–8.0
Primary Chemistry: Synthetic amorphous silica
Intermediate pore volume
Large particle size
High antiblocking performance
Easy to disperse
Excellent optical properties
Low dusting and inert, poses low health risks
Blocking of films during storage, processing, and transport
Poor optical properties of transparent films using antiblocking agents
Issues with dispersion of antiblocking agents
Food packaging films
Industrial films
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