POLYOLEFINS | MATERIALS
“We are proud to launch one of the most
comprehensive ranges to support customers in this initial phase and accompany them in the innovation process,” said Antonio Portela, director of polyolefins at Repsol. “The range is also available in its circular, bio, and bio-circular alternatives.”
Electric performance Eurotec of Turkey offers a number of polyolefin grades for film and sheet extruders – in applications including food packaging. Its Tecolen OXY0 MF17 NL IL QF – a 17%
mineral-filled polyolefin – is used as a lidding sealant resin by the food industry. It boasts high peel strength and provides smooth, consistent production during film coextrusion, says the company. With a special formulation, lids are easily openable while protecting the beverage inside. One of its conductive grades for the packaging industry is Tecolen OE20 BK111 EC 0F, a PE used in electrically conductive films to provide safe transportation and storage of large bags for protection against explosive or inflammable materials.
Another conductive material, Tecolen OE10 RD018 EC 0B, was developed for film and sheet applications. The translucent product that can be painted in any colour to assure the safe transfer of electronics cards from manufacturers to end-users. In addition, Tecolen OE20 BK EC 0E has a high conductive range that is used to prevent electrostatic discharge.
HDPE for MDO ExxonMobil has developed an HDPE grade for machine direction oriented (MDO) PE film applications. The grade, HD7165L, can help converters create mono-material laminates, which can be easier to mechanically recycle. Offering good optical and mechanical properties, the material can be used to make mono-material packaging for products such as nuts, crackers and potato chips. “The development of HD7165L has been driven
by market demand for all-PE packaging – which in turn has created a need for print webs made of blown MDO-PE films,” said Nilesh Savargaonkar principal customer and application development engineer at ExxonMobil. The grade can help converters produce blown MDO-PE films with 60-70% HDPE, for enhanced stiffness and high heat resistance. Output rates above 400kg/hr are possible, while bubble stability is maintained.
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MDO stretch ratios as high as 7:1 with very high stiffness can be achieved. Haze is less than 10% and gloss is higher than 60%. Used as a print web of a PE-PE laminate, it offers high heat resistance and stiffness – for a lack of extensibility.
In blown MDO-PE film applications, it offers
high, uniform orientation, gauge stability, and low gels for easy processability, said the company.
BOPE grade SCG Chemicals has developed an HDPE resin, which it says can be processed into biaxially oriented PE (BOPE) using tenter frame technology. “It requires a unique balancing of processing and film properties,” said Kanyanut Narkchamnan, full PE research and development leader at SCG Chemicals in Thailand
Its S197F multi-modal technology is available with low molecular weight (for stiffness and processability), high molecular weight (for toughness) or very high molecular weight – which adds higher mechanical properties and stretchability.
“BOPE film made of S197F provides high heat
resistance and good mechanical and optical properties – suitable for printing and coating in multi-layer structures,” she said. The films can be used to replace BOPA and
BOPET, she said – and are appropriate for moisture barrier applications.
In one case study – showcased at ProPak Asia – the BOPE film showed good dimensional stability and could maintain high line speed during the printing process. Seven-colour printing could be performed at a line speed of 100 m/min. The film was also used to make a recyclable, all-PE stand-up pouch – for applications such as liquid detergent or for packaging food. The structure comprised a 25-micron HD-BOPE layer, ink and adhesive, and a 120-micron PE layer. This compared with a previous structure, in which the BOPE layer was a 15-micron BOPA layer.
Complex parts Sabic has introduced two new materials for sheet extrusion and thermoforming. It says its PP compound H1090 and Stamax 30YH611 offer an alternative to traditional sheet metal forming, compression and injection moulding – allowing
January/February 2024 | FILM & SHEET EXTRUSION 37
Above: Eurotec offers a number of conductive polyolefin films
IMAGE: EUROTEC
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