You can build plenty of different projects with a huge variety of building materials available today including plastics. One increasingly popular choice is Ultra-High-Molecular-Weight (UHMW) polythene. If you’re curious about what kind of material is UHMW, it’s a type of high-grade plastic that has many uses. We break down some of the most common questions asked about it below.
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UHMW plastic is a particularly tough plastic. It’s highly resistant to impact damage compared to HDPE (High-Density Polyethylene) plastic and has an approximate tensile strength of psi and flexural modulus of 110,000psi.
Because of this, the plastic is perfect for a wide range of uses including production lines and food packaging and processing machinery. It’s also highly durable and able to be used over and over again without significant wear.
Yes, UHMW plastic can be welded. However, to get the best results it’s better to avoid using regrind although in some cases regrind plastic can also be welded.
While the plastic can be welded, it’s important to understand if there were any additives added to the plastic, it may result in it being unweldable.
For instance, if silicone or specific dyes to pigment the plastic are added, the material is no longer weldable. Unfortunately, the only surefire way to test which colours aren’t weldable is to actually try welding the plastic or to speak to the manufacturer if welding it is possible.
No. It would be HB on UL-1—i.e. slow-burning (less than three inches per minute). You’re safe to have it around heat without the worry of it bursting into flames from sparks. Because of this, and the fact that most UHMW plastic is weldable makes it perfect for a variety of projects and applications. Not least of which because the plastic is also highly abrasion and wear–resistant.
It’s not recommended that you try to heat and bend UHMW plastic. The material has a memory and will naturally want to return to its original shape until it is heated to a level where it just melts and no longer bends.
However, because of this property, it is perfect for products and applications where it needs to retain its shape, even under significant heat.
UHMW is not naturally anti-static, but it is possible to purchase anti-static UHMW plastic. This type of anti-static plastic can be protected against static discharge and its properties will also keep dust and particles from building up on the material. The additives put into the plastic to make it anti-static will also last for the life of the material.
This property is particularly helpful when replacing metal components that wear out faster.
UHMW plastic can’t be painted due to its water and chemically-resistant properties. While painting it isn’t possible, the material does come in a wide selection of colours that are likely solid substitutes to your initial painting plans.
Plastics are some of the best materials to work with as they break down much slower than other materials. What kind of material is UHMW? One that’s perfect for a wide range of projects and uses compared to other types of plastic. It’s durability, chemical resistance, and high abrasion resistance make it a natural choice for many uses.
UHMWPE pipe, also known as ultra-high molecular weight polyethylene pipe, is a pipe formed by continuous extrusion of ultra-high molecular weight polyethylene (UHMWPE) resin with a molecular weight greater than 2.5 million. Under the conditions of strong corrosion and high wear, the service life is 4-6 times that of steel pipes, which fully demonstrates the advantages of “energy saving, environmental protection, economy and high efficiency”.
Type
Item
UHMW-PE
Physical Properties
Relative molecular weight/ million
2-3
Density/ (g/cm3)
0.945-0.975
Grain size/ mesh
40-200
Mechanical Properties
Tensile yield stress/ MPa
≥20
If you are looking for more details, kindly visit UHMWPE Pipe Manufacturer.
Fracture Extensibility %
300-400
Flexural Modulus/ MPa
600
Impact Strength/ (KJ/m)
>140
Rate of Wear % (23±2) ℃
≤0.4
Thermal Properties
Melting Point/ ℃
136
Distortion Temperature/ ℃
85
Thermal Conductivity/ [w/(m.v)]
8.5
Electrical Properties
Mass Resistivity/ (cm)
10
Punch Through Voltage/ (Kv/mm)
50
Dielectric Constant
2.3
The density of UHMWPE products is between 0.93-0.95g/cm3, which can float on water. If it is not pure UHMWPE material, the product will sink into water.
Good quality UHMWPE products will not melt and deform at 200°C, but will become soft. Inferior UHMWPE products will deform at 200 °C.
The surface of good-quality UHMWPE pipe is smooth, neat, black and bright, and the cross-sectional density is very uniform. The surface color of inferior UHMWPE pipes is dull, and the cross-sectional density is uneven.
Good UHMWPE pipe ends are smooth, uniform, and have good roundness and verticality, but poor-quality UHMWPE pipes will crack and peel off after the pipes are heated.
If you want to learn more, please visit our website Customize UHMWPE Pipe.