Plastic Fantastic

Borealis' high-performance Daplen™ thermoplastic olefin (TPO) polypropylene-based compounds were chosen by Volkswagen Group's Skoda Fabia Roomster generation. Apart from attaining a high quality perception in Fabia's interiors, Skoda's Tier 1 suppliers Faurecia and Cadence Innovation worked closely to reach desired results including haptics, scratch resistance levels, low gloss, no odour or fogging and excellent colour performance for consistent, accurately-aligned parts.

Daplen EE189AI, a 17% talc filled grade developed especially for the automotive industry, was the preferred choice of French supplier Faurecia for the dashboard and trunk claddings. Its excellent scratch resistance, low gloss and consistent quality made it well-suited to Skoda's request for a smooth finish on the lower dashboard and grained version for the upper section. The need for extra impact strength and stiffness in the integrated instrument panel area was met with Daplen ME268AI, a 20% mineral filled grade. US supplier Cadence Innovation selected Daplen EE158AI, a 13% talc filled grade, for the interior surface cladding because of its combination of high stiffness and very good impact behaviour. The material's outstanding scratch resistance further added to its appeal for this application.

All three grades ensured low thermal expansion for the finished parts, delivering a consistent high quality fit between parts. Overall ease of processability contributed to a reduction in scrap rates, enabled thinner wall sections to be used and allowed faster moulding speed to meet Skoda's demands. The lower scrap rate alone provided a cost saving of 1.5%, while Borealis light weight Polypropylene provided a weight reduction of 5%, contributing to improved fuel consumption.

Cereplast, manufacturer of proprietary bio-based plastics has received confirmation of the low carbon footprint of its Biopropylene® resin. Biopropylene®-a patented compound manufactured using traditional polypropylene and up to 50% starch content-has shown 42% reduction in carbon dioxide emissions relative to traditional polypropylene, according to Ramani Narayan University Distinguished Professor of Michigan State University and an independent testing laboratory.

The independent study has found that approximately 1.82 kilograms of carbon dioxide are produced for each kilogram of Biopropylene® used, compared to 3.14 kilograms of carbon dioxide emitted for the same amount of polypropylene.

As per a senior authority with the company, the Biopropylene® also replaces up 50% of the petroleum content in traditional PP with bio-based materials adding to its environment-friendly characteristics. The converters can reduce green house emissions by 1.32 kilos which is a noteworthy milestone.

Progressive Components, America's leading supplier of components to the production tooling industry, introduces its new Friction Puller for parting line control.

Progressive's Friction Puller advances parting line control by improving mold life cycle and performance over other methods. The new Friction Pullers have been tested are proven to be extremely durable, with limited adjustment even after a million cycles. This combined with the exclusive venting and self-centering features proves provides added value to the customers. Unique features not found with competitors' models include:

1. Internal venting: - no extra through holes and no additional machining in the back of the mold is required.

2. Self-locating: - designed to allow the resin assemblies to self locate, even if plates shift due to thermal expansion or machining variances.

3. Indicator Arrows - remove guesswork during installation and adjustment

Each year thousands of tents are abandoned at festivals and end up in landfill but accommodation at these events could be about to go green.

Moulder JSC Rotational based in Worcestershire, the UK, has made a luxury ‘tent’ from a recycled compound developed by compounding and recycling firm Luxus.

Myhub is made from recycled plastics and waterproof cardboard and features a foam double bed while the base and end frames are moulded in 100% recycled MDPE.

If the idea catches on Luxus in Lincolnshire, the UK, hopes to introduce a “closed loop system” where the used myhub plastic parts are reclaimed and reused to produce more myhabs.

This story begins with a lost dog, and ends up in deep water. In between, there is collaboration between a diver with an idea for a better swim fin, the designers who brought his idea to life and materials suppliers who found the right resin blends to make it all work.

And there is also a bronze-level honor in the International Design Excellence Awards for the product they brought to the market: Omega Aquatics’ Amphibian swim fin with a blade that moves out of the way to make life easier for divers before they even enter the water. (The IDEAs are annual honors from the Industrial Designers Society of America.)

Fin creator Ronen Moyal, an avid diver, came up with a concept for a swim fin in which the blade would pop up and away from the foot bed.

The idea was to make it easier for divers to walk on the beach or a boat deck with the fins on, while getting ready to enter the water. But though he had gotten as far as putting his concept into computer-aided-design files, he did not know where to go next.

Enter the lost dog.

One afternoon, one of the workers at Designcraft Inc’s offices in Lake Zurich, Illinois, found a dog wandering in the business park, took it in and started looking for the owner.

The dog belonged to Moyal’s wife, who had another business in the park, and who mentioned that her husband had an idea for a new product, said designer Casey Stahl in a 13 September interview at the IDSA´s annual conference in Phoenix.

The diver and the designers hooked up, and Designcraft quickly saw the potential of Moyal’s concept.

“He’d been kicking the idea for a while, and when we saw it, it was almost one of those, ‘Why didn’t we think of this?’ projects,” Stahl said.

Walking with fins is awkward. Putting them on when the diver is already loaded down with scuba tanks and a weight belt can be dangerous, he said. Pulling them on in the water wastes time.

The Amphibian is designed so the diver can put them on right away, move comfortably on land, and swim away quickly once he enters the water, with the flexible motion of the fin itself pushing the blade into place.

Through the two-year development, the companies faced two major issues, Stahl said - which materials to use, and the mechanics of getting the fin to flip up out of the way when on land, but pop into use easily in the water.

Material choices were limited, as the fin and its movable parts needed to be able to stand up to salt water and the cold of a subarctic dive, but also move easily in the water.

The final product relies on two small stainless-steel springs on either side of the fin, and a polypropylene hinge molded into the PP substrate structure. The PP hinge also can be pushed down to release the blade with the heel of the other foot, which makes it easier to move the blade out of the way and climb a boat ladder at the end of a swim.

GLS Corp of McHenry, Illinois, was brought in to provide the right thermoplastic elastomer to add flexibility to the structure, with the companies taking advantage of the chemical bond of a TPE overmoulding on the PP substrate.

“It needs to be both flexible and robust,” Stahl said.

The fin uses two blends of GLS’ Dynaflex TPE to tweak the flexibility where it’s needed to give the fin the best possible performance in the water, said Dyana Hunsaker, GLS sales representative. The Amphibian also uses GLS TPE on the sole of the foot bed, to give more secure footing on slippery surfaces.

“Initially we called in GLS to help us on the bonding issue, but they helped us troubleshoot when we were running into problems in processing,” Stahl said. “We were able to find where we’d designed the PP a little too thin for what we needed in moulding.”

The Amphibian hit the market in late 2007, and Omega and its partners are working on future projects now, including a military-grade version, he said.

* Rhoda Miel is a journalist at Plastics News, a sister title of PRW and EPN

By the summer of 2009, consumers can expect to see plastic photovoltaic roof tiles on the market. The product will feature an injection moulded tile with a compression laminated photovoltaic layer.

Getting the tiles to market hasn’t been easy. Peter Bressler, founder and principal of Bresslergroup, a Philadelphia-based industrial design and product development firm, explained how he did it in this video report. He is speaking at the Industrial Designers Society of America’s recent national conference in Phoenix.

PRW's sister title Plastics News is teaming up with the 3,500-member IDSA to deliver a series of videos from the event.

PN reporters interviewed students, educators, inventors and design/innovation leaders from such firms as Lenovo, Nike, Dell, Navistar, HP, Bayer, GLS, Hong Kong Polytechnic and many more.

The series is called “Design Briefs: An original video series on collaboration, education, sustainability, China & more.” The interview with Bressler is the first in the series. Watch for at least 12 video clips, to be released one per week, on the IDSA.org and Plastics News Global Group Web sites.

A £12m project to develop the technology that will eventually allow e-readers to display in colour has been launched by Liquavista and Plastic Logic.

The three year research programme will allow the two companies to develop next generation flexible electronic displays using Liquavista’s patented electrowetting technology.

Applications could include e-magazines, watches, phones, secondary displays on laptops, and consumer or medical devices with an electronic display.

Liquavista, a spin-out company of Philips Research Labs, is expanding its scientific and engineering team in Cambridge by recruiting 15 technical and five commercial staff members.

It launched its first display platform using its electrowetting technology earlier this month, aimed at watches and mobile phone secondary displays.

Liquavista vp marketing and sales, Simon Jones, told PRW.com: “It’s great news for the UK. It’s showing we have the continued ability to create these leading technologies, and build and maintain a national competence in plastic electronics and display.”

The research will be partially funded by the government sponsored Technology Strategy Board.

“There will be some commercialisation phase after, and possibly parallel, with the back end of the development project,” Jones added. “It’s not going to be one big leap because there will be simple flexible displays first and then gradually more complex displays.”

An image is formed on an electrowetting display when a voltage is applied to a coloured oil – this makes the oil contract. The technology will create thin, flexible and light screens that display bright, colourful images and show video content with low power consumption.

More than 90% of the manufacturing cycle uses standard LCD manufacturing equipment and processes.

The majority of Liquavista’s next generation display research is currently carried out in its Eindhoven facility in The Netherlands. The company has 60 staff worldwide – this number does not include the new hires.

The new jobs would be split between the company’s office in Abbotsley, outside Cambridge, and Plastic Logic’s Cambridge offices.

The displays will initially use plastic substrates as the carrier for the TFT backplane. Jones said there could be a plastic backplane on products within two to three years.

“It’s the subject of active development,” he said.

“Some of the research from [the Plastic Logic joint project] and some of our own research independent of that project will together help to develop [a plastic backplane].”

DuPont has developed the first oil pan module for serial vehicle manufacture which will be used on Daimler’s 4 cylinder diesel engines, initially on the Mercedes C Class.

The company highlighted the engineering polymer breakthrough, for its Zytel 70G35 HSLR nylon, at this week’s Fakuma show. The 6 litre capacity oil pan comprises a die cast aluminium upper shell and multi functional lower shell made from the nylon.

The component, moulded by automotive supplier Bruss, offers a 1.1 kg weight saving over an entirely aluminium design and offers scope for further functional integration in future.

The pan involves a sophisticated sandwich design with a second injection moulded part welded onto the pan’s flat section. This design helps to calm the oil churned by the crankshaft while high ribs in the sump, which act as baffles, also help to achieve this calming.

The project involved close cooperation between DuPont and the moulder with finite element analysis techniques used to refine positioning of the ribbing, improving the stiffness of the critical flat section of the plan.

Flow studies carried out by DuPont showed the impact of wall thickness, gate number and positioning and weld line formation and warpage behaviour.

In fact, DuPont noted, the high flow rate of the Zytel enables one single gate to fill the mould cavity completely, resulting in reduced tooling costs and simplified process control.

Tests at DuPont’s technical centre at Geneva involved the combined engine and transmission “being dropped forcefully by a fork lift truck”. Real life tests at Bruss also confirmed the performance of the polymer-based component.

A new laundry detergent pack designed in the UK demonstrates efforts being made by brand owners to answer criticism about over-packaging.

Breaking away from the usual bottle shape, the compact packaging for Ariel’s new Excel Gel is described as a “pebble”. Design features reduce waste in the packaging and also the detergent dosing by the consumer.

Structural packaging design firm Studio Davis, based in Bath, worked on the project with in-house design managers at Procter & Gamble, owner of the Ariel brand. Will Davis at Studio Davis told PRW that as Excel Gel is a new product, P&G wanted to have a new type of pack.

The result is a headstanding format, which uses 45% less packaging than the current Ariel dilute liquid. It has various integrated components that also help its environmental credentials.

The container is topped by a snap-on/snap-off doser, which is two-shot moulded from polypropylene and a TPE. An integrated “visi-strip” gives consumers a clear gauge on how much gel they have remaining in the pack.

Precision dosing by the consumer is helped by a squeezable form designed to be intuitive. The packaging is optimised to spring back into shape and ensures the consumer has complete control in dispensing the gel.

Davis said project time was spent on material flow simulation to make the polypropylene “squeezy” and avoid the buckling that often happens with other detergent containers.

No information about the packaging manufacturer has been made public by P&G.

Sabic Europe has launched a conversion efficient polypropylene flowpact composite for thin wall packaging, pails and containers plus caps and closures markets.

The chemicals giant said PP FPC55 provides faster moulding cycles with excellent flow behaviour and an exceptional balance of impact and stiffness, allowing for thinner wall options.

It added that the key issues facing the packaging industry are increased cost pressure driven by rising energy prices and a stagnating demand in a mature market.

Sabic argued that improving conversion economics was therefore “vital” to manufactures within the packaging industry.

PP technical marketing engineer for packaging, Diederik Goyvaerts, said the material could help speed up moulding cycles by 15%. He added that the material also offered “superior flow behaviour” similar to 70MFI due to its “unique rheology”.

Sabic also offered the material with an additive package. Increased crystallisation speed enabled shorter cooling times and more efficient conversion. Sabic added that parts down gauging options become a reality using the improved rigidity while the impact performance remains at a “superior” level.