Packaging, blending and compounding basell North America's (Basel)'s two new polyethylene resins pose a challenge for PS, PET, PVC and other PP series plastics as transparent and rigid packaging materials that can be thermoformed and stretched in thermoplastics New balance of properties formed on blow molded and injection molded parts.
Basell has a new third PP family, this function resin has a variety of effects, as a dispersant for plastic flame retardant, as a compatibilizer for engineering thermoplastic blending, as a coupling agent is used in Reinforced polyolefin composites.
Transparent hard material basell The company's new PP family, Adstif, has a wide range of consumer packaging customers. The basell material is used in cast film, sheet and thermoforming Spheripol processes. (In earlier times, the Adstif brand was produced by the Catalloy process as a blended resin for the production of automotive injection molded parts)
Due to the wide distribution of the molecular weight of the new materials, these resins have improved greatly in terms of impact resistance, rigidity and heat distortion temperature compared to standard PP. They also equal or exceed PS, PET, and PVC in terms of transparency and toughness balance.
There are currently four grades available: Adstif X83-1 is a 3.5 MFR homopolymer used in the production of turnover containers, beverage cups and lids; X34-1 and X65-1 are considered typical reaction body grades and contain 15 % Rubber and 3.5 MFR impact copolymer; X34-1 is designed for frozen milk and ice cream containers; X-65-1 is suitable for sports cups and hollow corrugated cardboard.
Adstif X786-1 is a 4 MFR impact copolymer with less than half the rubber content of traditional impact copolymers and is designed for refrigerator storage packages such as milk tubes, yogurt cups and serving containers.
Basell claims that Adstif thermoplastic containers are superior to PS containers in transparency and impact resistance in lightweight packaging. For example, a 230cc deep-formed beverage cup produced using Adstif X83-1 resin has better impact resistance, top loading strength and transparency than PS cup, and the PP cup is reduced from 3.9g of PS to 2.1g, although the weight is reduced by 46%. , but performance is still better than PS.
Similar results were obtained for the moderately shaped cheese cups, where the weight of Adstif was 32% less than the HIPS/GPPS mix and 17% lighter than the standard PP homopolymer.
In multilayer cast film packages such as bread bags, Adstif is said to have better strength, toughness, and barrier than standard PP. In addition, Adstif's production efficiency is very obvious. In the high-speed packaging line, Adstif resin production speed up to 350 bags per minute without losing strength, the traditional PP material began to lose strength when the speed exceeds 310 bags.