MATERIALS | TPEs
Right: Poly- One’s Versaflex PKG TPE was selected for this next-gen- eration make-up
compact case for its sealing and over- moulding performance
be over-moulded onto plungers, eliminating an assembly step. In addition to grades for over- moulding onto polypropylene, speciality grades are available that, unlike TPVs, can be over-mould- ed onto engineering resins such as polycarbonate, ABS, PC/ABS, acrylic, acetal, PBT, and COPE. In addition, unlike most TPVs, the Medalist TPEs do not require pre-drying, Teknor Apex says. According to the company, Medalist TPEs show
improved compression set in comparison with competing TPEs, making for a more secure seal. The compounds can be moulded in high-cavitation tooling and all grades are sterilisable and available in natural or black colours. The company says the compounds offer substantial advantages over rubber, which has been the predominant material for use in syringe stoppers. TPEs avoid the curing step required in rubber processing, eliminating concerns about extractables and leachables, and scrap can be recycled. They also process in considerably shorter moulding cycles and lend themselves to more intricate designs and tighter dimensional tolerances. “Stoppers must move smoothly against the wall
of the syringe barrel, provide an exceptional seal to preserve the integrity of the drug, and be chemi- cally inert to prevent interaction with the syringe contents,” says Ross van Royen, Senior Market Man- ager Regulated Products. “Teknor Apex has developed a portfolio of Medalist TPEs that meet these performance requirements while providing substantial economic advantages because of their ease of processing.”
Below: Sporting goods are one of the target markets for NYCOA’s new Ny-Flex PEBA TPEs
Cosmetic improvements PolyOne has developed TPE materials for cosmet- ics packaging that are intended to enable new design opportunities for brand owners. “Leading cosmetic brands and converters are choosing our chemically compatible Versaflex PKG materials – in place of silicone and standard TPEs – to create a wide range of tactile finishes, improved process- ability, and lower production cost,” says Michelle Hearn, Global Marketing Director, Specialty Engineered Materials at PolyOne. “These REACH-SVHC compliant TPEs have been particularly successful in Europe, where PolyOne application engineers are collaborating with brands in the early product development stages to help create highly effective, differ- entiated products.”
74 COMPOUNDING WORLD | June 2018
PolyOne cites the example of a market-leading global cosmetics brand that selected Versaflex PKG for its next-generation make-up compacts. The choice was based on the material’s chemical compatibility with the makeup formulation along with its REACH SVHC compliance, sealing proper- ties, and over-moulding adhesion to polypropyl- ene. Other claimed benefits of the Versaflex PKG TPEs include high resistance to discolouring, etching, cracking and delaminating when in contact with most soaps, lotions, oils, surfactants and solvents. PolyOne has also developed OnFlex LO TPEs, a
portfolio of low VOC/FOG and odour polymer grades that assist automotive OEMs to meet vehicle interior air quality (VIAQ) standards (VDA 278). Applications include HVAC dampers, fasteners and clips, coin trays, centre consoles, door pockets and other interior parts. They offer additional character- istics, such as high temperature sealing perfor- mance, matt surface finish, and low density.
PEBA introductions NYCOA has launched an extended product range of PA-based TPEs, also known as polyether-block- amides (PEBA), for applications in the automotive, sporting goods, personal electronics, composite and speciality films markets. The company says that the Ny-Flex range is based on block copolymers of PA and polyether segments and represents a new class of PA-based engineering thermoplastic elastomers (E-TPE). The PA block is the hard segment and the polyether block is the soft, flexible segment. By varying the type and the ratio of these two blocks, a wide range of NyFlex grades are offered – the company currently offers grades ranging in hardness from 82 Shore D to 90 Shore A. “These innovative materials have been designed to fill a technology gap in the E-TPE material space,” says Pratik Shah, Vice-President of New Business Development for NYCOA. “During the extensive development cycle, our customers have
www.compoundingworld.com
PHOTO: POLYONE
PHOTO: NYCOA
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100
