Research leads to enhanced kit to improve design and processing of plastics

Sep 26, 2011
This is a PVT machine at NPL. Credit: NPL

The National Physical Laboratory (NPL) has developed a world-leading pvT (pressure-volume-temperature) and thermal conductivity test kit.

The kit is based on more than nine years of extensive research at NPL. It can be used to help improve the design and processing of , including the injection moulding process used to make specialised polymers and everyday plastic items such as CDs

NPL's equipment can measure the thermo-physical properties of polymers. It can help improve the injection moulding process by allowing to find the exact pvT and shrinkage properties of a material. Although plastics are the main material tested, other more unusual materials such as and even chocolate have also been analysed.

The pvT instrument operates at pressures ranging from 200 bar to 2500 bar, and is the only equipment in the world that can test materials at ultra fast cooling rates of up to 280 °C/min and down to temperatures approaching −100 °C. NPL found that at higher pressures polymers can conduct heat up to 20% more efficiently, leading to faster cooling rates and shorter cycle times.

A thermal conductivity measurement facility is also incorporated into the instrument. Research on the properties of polymers such as HDPE (high-density polyethylene) and PBT (polybutylene terephthalate) is vital to manufacturers and it was found that they can increase their production rates and gain a higher profit by filling a with glass - as this cools faster, reducing the time that the polymer needs to stay in the mould. The less time the polymer stays in the mould, the faster the output rate of products.

Angela Dawson a Higher Research Scientist for NPL's Materials Division, said:

"pvT testing kits are essential for improving design and processing of ubiquitous, everyday plastics and for more specialised polymers with advanced applications. NPL is the only laboratory where manufacturers can send materials for testing using this advanced equipment and this work has improved the reliability and accuracy of measuring pvT data."

Explore further: Non-wetting fabric drains sweat

Provided by National Physical Laboratory

not rated yet
add to favorites email to friend print save as pdf

Related Stories

Breaking the mold

Jul 11, 2011

National Physical Laboratory, after over nine years of extensive research, has developed a world-leading pvT (pressure-volume-temperature) and thermal conductivity test kit that can be used to help improve ...

If you can't measure the heat...

Jul 29, 2008

Accurate measurement of thermal performance is crucial if new government legislation aimed at producing dramatic reductions in CO2 emissions is to be successful. The UK's National Physical Laboratory (NPL) is offering constructi ...

A warmer future for watersports (w/ Video)

May 19, 2010

Watersports enthusiasts will soon be able to surf in colder waters and keep warm for longer, thanks to The National Physical Laboratory (NPL) and UK wetsuit manufacturer, Spartan.

Researchers at UA developing next-gen conductive polymers

Dec 23, 2010

(PhysOrg.com) -- Conductive polymers, while not quite wonder materials, have the potential for being so and University of Akron polymer scientists and polymer engineers are focused on developing the next generation ...

Carbon Nanotubes for State-of-the-art Packaging

Jul 12, 2004

Carbon Nanotechnologies, Inc (CNI) and Kostat, Inc. today announced a joint development agreement to develop and commercialise conductive polymers for electronics module trays, carrier tapes and other electronics related ...

Recommended for you

Making ice-cream more nutritious with meat left-overs

4 hours ago

Food industries are now turning meat left-over into high-protein content ingredients for food supplements, or to be added to processed food. But a EU-wide regulation covering them is still lacking.

Non-wetting fabric drains sweat

19 hours ago

(Phys.org) —Waterproof fabrics that whisk away sweat could be the latest application of microfluidic technology developed by bioengineers at the University of California, Davis.

Protein study suggests drug side effects are inevitable

21 hours ago

A new study of both computer-created and natural proteins suggests that the number of unique pockets – sites where small molecule pharmaceutical compounds can bind to proteins – is surprisingly small, meaning drug side ...

Attacking MRSA with metals from antibacterial clays

May 17, 2013

In the race to protect society from infectious microbes, the bugs are outrunning us. The need for new therapeutic agents is acute, given the emergence of novel pathogens as well as old foes bearing heightened antibiotic resistance.

User comments : 0

More news stories

Protein study suggests drug side effects are inevitable

A new study of both computer-created and natural proteins suggests that the number of unique pockets – sites where small molecule pharmaceutical compounds can bind to proteins – is surprisingly small, meaning drug side ...

Non-wetting fabric drains sweat

(Phys.org) —Waterproof fabrics that whisk away sweat could be the latest application of microfluidic technology developed by bioengineers at the University of California, Davis.

Beautiful 'flowers' self-assemble in a beaker

By simply manipulating chemical gradients in a beaker of fluid, materials scientists at Harvard have found that they can control the growth behavior of crystals to create precisely tailored structures—such ...

Attacking MRSA with metals from antibacterial clays

In the race to protect society from infectious microbes, the bugs are outrunning us. The need for new therapeutic agents is acute, given the emergence of novel pathogens as well as old foes bearing heightened antibiotic resistance.

If you can remember it, you can remember it wrong

(Medical Xpress)—Native peoples in regions where cameras are uncommon sometimes react with caution when their picture is taken. The fear that something must have been stolen from them to create the photo ...