Ultra High Molecular Weight Polyethylene Tubing

What is UHMW-PE?
UHMW-PE stands for Ultra High Molecular Weight Polyethylene. It is the highest quality polyethylene (PE) available, designed for heavy duty work and a wide range of applications. It brings savings in a series of heavy applications. The ultra-high molecular weight is the secret of the unique properties of this polymer. Its high-density polyethylene resin has a weight of molecule ranging from 3 to 6 million, compared to 300,000 to 500,000 for (HMW) resins. That difference is what ensures that this material is strong enough to withstand abrasion and impact better than lower level poly products. The high molecular weight of UHMW-PE means that it will not melt or flow as molten liquid. The processing methods are derived from those metal powder technologies. UHMW-PE cannot be processed and shaped by conventional plastic processing techniques (injection molding, blow molding or thermoforming). Compression molding is the most common conversion process used with this resin because it produces a stronger, more consistent product.

Ultra High Molecular Weight (UHMW) is a polymer designed with a unique combination of wear and corrosion resistance, low friction and impact resistance. UHMW is resistant to chemical attack and moisture absorption and retains its key physical properties at -30 ° C.

The very high molecular weight (UHMW) of polyethylene mostly outlives all other materials, including metals, nylon, urethane and fluoroplastics.

Other attributes of UHMW Ultra High Molecular Weight Sheet products include:
• Should be resistant to abrasion
• Should have a low coefficient of friction
• Should be easy to machine
• Should have a low noise level
• Should be self-lubricating
• Should not absorb moisture
• Should be non-toxic and have a low friction
• Should have a high Impact strength (will not break or shatter)
• Should be resistant to chemical
• Should be FDA and USDA accepted
• Broad temperature range (-450oC to +180oF)

Engineering specifications for UHMW Ultra High Molecular Weight Sheet are:
• Tensile Break: 5,800 psi
• Static friction: 0.15
• Flexural Modulus: 110000
• Hardness: 68
• Yield Point: 3050
• Continuous Service Temperature:180° deg. F

Applications include: spindles, bearings, chain grommets, chain guides, duct covers, gears, grain separators, casting liners, guides, mixers, blades, roller guides, spiral freezers, separators, ventilation plates and filters, carrying straps


UHMW plastic films can be used for various industrial applications including, but not limited to:
• Plastic production
• Food processing
• Gears and gears
• Truck lining
• Hydrofoil polymer
• Paper and Registration
• Mining, agro-industrial and electrical industry
• Defense systems, springs, helmets

The Benefits of Entering Into a Service Contract for Your Industrial Weighing Equipment

Coping with faulty weighing equipment can immediately impact on your business efficiency and ability to get the job done

By entering into a customised repair/service contract, covering your most crucial weighing equipment, you will have the confidence that your staff can continue to work without unnecessary interruptions due to equipment failure, and that your scales will be taking accurate weight measurements throughout the day and night.

The professional servicing and repair of your scale equipment should actually save your business money by minimising the impact of any loss of performance.

Look out for a supplier that can design a service agreement around your specific business requirements, and that it’s a flexible contract that can be added to over time, as your plant, equipment and operational needs change.

Why do you need a servicing/repair contract?

Your weighing equipment plays a vital role in ensuring your products are accurate and comply with all weights and measures legislation, so its something your business can’t afford to neglect.

Over time, particularly if your scales are in frequent, daily use, it is almost inevitable that they will lose a degree of accuracy, however slight.

If you have invested in a portable weighing device that might be regularly moved or re-located to different parts of your workshop, it might be more open to accidental knocks etc. Even a minor knock can mean your weighing device loses accuracy. This might be the case with wheel and axle weighing stations that you need to move to different vehicle locations and even sites. Look out for an axle weighing UK service specialist, as they understand the conditions in which equipment is typically used.

Scale accuracy can also be lost if equipment is used in hazardous and/or wet environments, and if they are regularly cleaned down.

A regular service visit will ensure that your equipment remains in good working order

A regular service visit by a business that knows and understands your industry and equipment, say every 6-12 months or so, depending on your environment and weighing needs, will ensure that equipment stays in good working order and is able to perform the tasks you require of it.

Ordinarily when scales need calibration or to be repaired, you would typically call either the manufacturer you purchased your equipment from, or Trading Standards.

Look out for combined expertise – it could save time and money

The good news is that there are a few weighing specialists out there that can provide a repair, service and UKAS approved calibration service, as a single contact. That means your staff will have one contact point for everything should something go wrong or they need advice.

Lifetime support and surety – preventive servicing really works

One of the main benefits of entering into a servicing/repair agreement is that you can expect accuracy and reliability over the lifetime of your weighing scale.

By having equipment regularly serviced and inspected by trained technicians, scale problems should be highlighted and dealt with before they escalate, so you can look forward to constant, efficient processing and accurate production runs.

Regular calibration is also essential

It is a legal requirement that weighing equipment is regularly calibrated, so make sure this forms part of your service agreement.

Upgrades, replacements and additions

A professional service provider that understands your weighing requirements and industry standards should also be working with you, to ensure that your present set-up continues to meet your demands. A reputable supplier should be able to chat to you about compatible upgrades, replacements and additions providing even more scope for increased efficiency, processing and business savings.

It pays to check out the experience of your preferred service supplier, to make sure they have the necessary insight and technical knowledge about the weighing equipment you currently use.

Impressing customers, complying with quality expectations

Customers these days want to work with professional, capable suppliers that can prove their diligence and ability to fulfil their needs.

By having your weighing equipment regularly serviced and by keeping records to prove it, you can provide traceability to nationally recognised quality standards, but also impress your customers by producing the paperwork to back up the accuracy of your equipment.

Importance of Melt Flow Index Testing in Polymers

Polymers are used in manufacturing a wide range of products. A good quality polymer can bring profit and branding, whereas low-quality polymer can bring safety issues, sales loss, and downfall in branding. Hence, an efficient polymer test method is used by manufacturers to rank the polymer material by evaluating its melt flow properties.

Why is polymer testing required?

The use of melt flow index (MFI) test, which is also known by the name of melt flow rate (MFR) test, dates back to the preliminary time of polymer science and material categorization. This testing method may seem very basic but is the best technique to rank the polymer samples as per its test results. Many polymer processors give high importance to this evaluation based ranking. Moreover, medical device, food, and pharmaceutical packaging manufacturers have set polymer melt flow testing as their clearance criteria for suppliers. They use the test results as benchmarks to ensure that the material will match the intended behaviour during its processing, extrusion or injection moulding.

How is the test conducted?

The MFI tester is an accurate testing instrument which is used to calculate the polymer mass extruded through a capillary die at a particular temperature and applied force. The testing sample can be a virgin resin or material from a finished thermoplastic product. The specimen is loaded into the preheated barrel of the tester along with a piston. A specified amount of load is kept on the piston for the application of force. When the appropriate condition is reached the specimen starts melting and starts flowing out from the capillary die. After cooling down, the extruded polymer sample weighed. The test results are then computed, which is the weight of sample flown in 10 minutes of time.

Characteristics determination of polymer by MFI test

Distinct useful characteristics of polymers are determined by testing the flow properties of the material. The melt viscosity of a polymer during the test is inversely proportional to its flowing behavior. More the polymer is viscous, slower will be the flow. The test data can also be linked to the molecular weight of the sample. Long chain polymer requires more time to get pushed through the capillary and thus have a slow flowing nature. Data related molecular weight distribution can also be taken by performing the test at the same temperature with distinct load application. Also, the shear viscosity of a particular sample can be computed by applying an inversely proportional relationship. The reasons behind opting for an MFI test over other techniques for evaluation of these properties are its promptness and its cost-effective nature.

Maybe the melt flow index testing appears to be basic and is sometimes not opted over the complicated and latest technologies, but it can deliver highly accurate and analytic test results complying all the test requirements.