High-Flow, Low-Density TPEs For Automotive Debut

By: Lilli Manolis Sherman 27. March 2015

Aiming at a variety of automotive applications such as cup holders, air-guide systems, window seals is Kraiburg TPE, Duluth, Ga., which launched at NPE2015 new custom high-flow TPEs. They are said to allow for filling the mold cavity with even pressure, resulting in consistent gloss on the show surface of the part. Compared to other TPEs, TPVs and PVC, the Kraiburg TPE’s are said to typically increase the molder’s profitability because they yield reduced cycle time, reduced scrap, and are easier to process.


In addition, the high-flow TPEs are formulated to have less off gassing than competitive grades, which enables the process to run longer without having to have the mold cavity surface cleaned—a major cost advantage. In addition, these grades have very low specific gravity—generally 0.93 g/cc, while commonly used PVC has a typical density of 1.40 g/cc. Using these densities, in a typical design for rear quarter light window, these TPEs have been shown to offer a vehicle weight savings of 0.63 lbs.


Want to find or compare materials data for different resins, grades, or suppliers? Check out Plastic Technology’s Plaspec Global materials database.


"Revolutionary" Device Makes Purging Safer, Simpler

By: Lilli Manolis Sherman 26. March 2015

What is said to be a “revolutionary” device designed to capture molten plastic purges and create a safer environment for personnel and equipment in plastic processing operations is being introduced at NPE2015 by the Dyna-Purge div. of Shuman Plastics.


            Lava-Shield is the result of a two-year development project and hundreds of rigorous field trials. This protective purge guard is said to be easy to use with a variety of processing equipment including injection molding, extrusion, compounding, blow molding and film of virgin and recycled materials. Field studies found that most purges were shot onto cardboard, or even worse, grabbed by hand with a hot glove or rag. Such operations always result in waste because the purge gets contaminated and has to be disposed of—aside from the injury potential to personnel.


            Designed with a unique combination of specialty papers, Lava-Shield absorbs and then dissipates heat quickly and will not hold or transfer heat. When the purge cools, the special non-stick surface releases the purge, free from contamination, The purges can then be recycled or sold for values. This protective purge guard is reusable up to five times, made in the U.S. with up to 30% recycled content and, can be recycled along with other plant and office waste paper.


            Says company president Ken Shuman, “Plastics purges are extremely hot and our clients challenged us to create a device that could take the heat in capturing the purges while also protecting employees and equipment. They wanted something that is safe to use, easy to customize, with quick release properties to keep purges clean…and it should be reusable and recyclable. We responded and are proud to introduce Lava-Shield, designed with plastics processors in mind to help them purge smart.”


            Lava-Shield is available in 150 count “full-brick” quantities, or 75 count “half-brick” quantities. A free sample is available for qualified applications.


Want to find or compare materials data for different resins, grades, or suppliers? Check out Plastic Technology’s Plaspec Global materials database.

Specialty Olefinic TPE For High-End Cast Power Pre-Stretch Films

By: Lilli Manolis Sherman 25. March 2015

The newest grade in the Vistamaxx metallocene-catalyzed specialty olefinic TPEs from ExxonMobil Chemical is designed for high-performance cast power pre-stretch (PPS) films and makes its debut here at NPE.


            When used in the functional layer of cast PPS films, Vistamaxx 6000 is said to provide outstanding ultimate stretch, excellent holding force and tear propagation resistance even at thin gauge. This reportedly contributes to the secure transportation of goods, while helping to reduce waste and cost from damaged products.


            “Although the functional layer of stretch film comprises only about 10-15 percent of the total film composition, the intrinsic properties of the material used in that layer are key to performance. Vistamaxx 6000 has been designed to improve stretch film performance in response to market trends,” says global development manager Bill Ramsey. One such trend is the emergence of more mechanized and automated logistics chains, and the growing use of pallets to transport goods. Cost-efficient logistics operation can be made possible by combining the advantage of high-performance films and high-speed wrapping equipment,


            End-users are also moving to higher stretch or thinner gauge high-performance films, which can ultimately result in less film weight for the same pallet stability. “In the functional layer of cast PPS films, Vistamaxx combines high stretch with high holding force, exceptional toughness and easy processability for high output. It creates a very versatile film that adds value for both the extrusion and wrapping operation,” says Ramsey.


            European stretch film producer Ergis S.A., with a market presence in the PPS segment, has been running Vistamaxx 6000 in the functional layer of a high-performance PPS film. “We are impressed by the film’s excellent processability. Vistamaxx 6000 demonstrates flow right to the edges of the die resulting in excellent web stability and film roll appearance. Also, the film’s properties—ultimate stretch, stretch force and puncture—measured at 300% pre-stretch, were outstanding. The excellent tear propagation resistance provided by Vistamaxx 6000 clearly enables smooth, high-speed wrapping operations,” says Ergis’ managing director Grzegorz Kedzierski.


Want to find or compare materials data for different resins, grades, or suppliers? Check out Plastic Technology’s Plaspec Global materials database.



Transparent Nylons That Can Also Be Used As Additives

By: Lilli Manolis Sherman 25. March 2015

A line of highly versatile semi-aromatic nylons with a unique combination of performance, cost-effectiveness and recycled content were launched by Invista, Wilmington, Del. Moreover, these Novadyn DI/DI transparent polymers can also be used as differentiated blend additives to improve traditional nylon performance. They targeted to bring value to users who require parts that are both transparent and chemically resistant.


            “We developed Novadyn DI/DI nylon for transparent applications where polycarbonate struggles with chemical resistance or where more costly transparent polymers may be over-specified. The nylon world in not ‘dry as molded’. In humid environments, Novadyn nylons can boost traditional nylon properties, enable thinner parts, and enhance light-weighting initiatives,” says Allen Reihman, director of new business development for Invista.


            As a blend additive for traditional nylons, Novadyn DI/DI nylon significantly improves conditioned mechanical properties for nylons 6/6 and 6, including up to 43% improvement reported in conditioned flexural strength and stiffness.


Want to find or compare materials data for different resins, grades, or suppliers? Check out Plastic Technology’s Plaspec Global materials database.


Fiber-Reinforced & Low-Volatility LSRs Unveiled

By: Lilli Manolis Sherman 24. March 2015

Fiber-reinforced and low-volatility LSRs are being launched at NPE2015 by Momentive Performance Materials, Waterford, N.Y.


            • Applications requiring the features of silicone rubber and the strength of fiber reinforcement—such as wrist bands for wearable electronic devices, can obtain the combination of mechanical properties by using MPM’s new Silopren Matrix 70 fiber-reinforced LSR. Compared to standard LSR of the same hardness, this material has demonstrated 30% higher torsion resistance and 100% higher modulus—properties that may save manufacturers the cost of incorporating a fabric layer into their products. Silopren Matrix 70 also boasts excellent UV resistance and can be easily colored. The product may also be considered for use in some healthcare applications such as wearable electronics or diaphragms pursuant to FDA regulations and ISO 10993.


            • The company’s new non-post-cure, low-volatility self-lubricating LSR Silopren LSR 3376/50 boasts very low volatile levels without post-curing. It is engineered to help automotive manufacturers produce electrical connector seals that meet increasingly stringent safety specifications, This is the first product in MPM’s new low-volatility, self-lubricating LSR family. It has a 3% oil content and contains less than 350 ppm of total volatiles. The material typically has a nominal hardness of 50 Shore A, a low compression set of 16% and its can be easily colored. The material was developed to meet new stringent global automotive specifications.


Want to find or compare materials data for different resins, grades, or suppliers? Check out Plastic Technology’s Plaspec Global materials database.


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