Stabilisers are added to PVC to allow its processing and to improve its resistance especially in outdoor applications, weathering and heat ageing and have an important influence on the physical properties of PVC finished articles. Factors such as process technology involved, technical requirements of PVC end product, regulatory requirements and cost, influence the choice of the stabilizer used.
Calcium-based stabilisers have also been introduced in PVC rigid calendering film production when improved organoleptic characteristics are required, for instance as alternative to tin mercaptides in transparent food packaging application or as alternative to tin carboxylates in PVC blown films shrinkable and for candy wrap. Similarly, calcium-based stabilisers are now an alternative to Liquid Mixed Metals (LMM) for several flexible applications, especially for the indoor ones, when stringent air quality requirements are in place (see “VOC improvement” under the liquid stabilisers).
The use of calcium/zinc stabilizer systems has been common in PVC. Because of the characteristics of calcium/zinc stabilized materials they are widely used in many flexible and rigid PVC applications. This type of stabilizing system can give products which have a high degree of clarity, good mechanical and electrical properties, excellent organoleptic properties and good outdoor weather ability.
Calcium zinc stabilizer is synthesized by special composite technology with calcium salt, zinc salt, lubricant and antioxidant as the main components. It can not only replace lead cadmium salt and organic tin and other toxic stabilizers, but also has good thermal stability, optical stability, transparency and coloring power. Practice has proved that, in PVC resin products, good processing performance, thermal stability is equivalent to lead salt stabilizer, is a good non-toxic stabilizer.
The global metallic stearate market size was valued at USD 3,017.7 million in 2016. The U.S. metallic stearate market size was recorded at USD 263.9 million in 2016 and is anticipated to grow at a CAGR of over 3% from 2017 to 2025. There are various product types in the industry, including ones based on zinc, calcium, aluminum, and magnesium. The others segment includes, sodium and lithium stearates. The demand for the product in various applications, such as plastics, rubber, pharmaceutical, cosmetics, building & construction, and paints & coatings has increased over the years, and is expected to expand in major markets such as China and India.As a whole any entrepreneur can venture in this project without risk and earn profit.
