In this blog, you can find frequently asked questions about UHMWPE.
What is UHMWPE?
UHMWPE is a material that has good wear resistance, excellent impact strength, and good self-lubrication. It is the King of Engineering plastics.
What is UHMWPE stands for?
UHMWPE stands for Ultra high molecular weight of polyethylene. It is the highest quality polyethylene ( PE) available, engineered for tough jobs and a wide range of applications. It delivers savings in a number of industry applications.
What is the density of UHMW?
Its density is 0.94-0.96 g/cm^3.
Which is stronger HDPE or UHMW?
UHMW material property is better than HDPE, and it always is produced by the pressing method, while HDPE is normally produced by extrusion, the pressing method can make the material stronger than extrusion. so UHMWis much stronger than HDPE.
Is UHMW bulletproof?
UHMWPE fiber material is bulletproof, which can be used for making bulletproof and stabproof vests. UHMWPE powder material can be used for other fields like making UHMWPE sheets for lining, harbor-facing pads, crane outrigger pads, wearing blocks, paper dewatering suction boxes, etc.
What is stronger than UHMW?
At the same price level, UHMWPE is the best cost-performance material among all kinds of engineering plastics. It is strong enough in so many areas like wear resistance, impact strength, corrosion resistance, self-lubrication, etc.
Is UHMW stronger than steel?
From the wear resistance view, UHMWPE is 15 times stronger than carbon steel.
Which is harder UHMW or HDPE?
UHMWPE shore D hardness is 65-70, while HDPE is 60-65.
Does UHMW float in water?
Yes, UHMWPE virgin material density is 0.94-0.96 g/cm^3, which is less than 1, so it can float in water.
Which is harder Delrin or UHMW?
Delrin is stiffer and stronger in unfilled form, has shorter molding cycles, easy to machine, has low moisture absorption, and has a better surface finish.
Is nylon stronger than UHMW?
Nylon and UHMWPE are different. They belong to engineering plastics but have different applications. UHMW wear strips, chain guides, packaging machinery parts, and marine dock fender pads. Nylon is a strong and stiff engineering plastic with outstanding bearing and wears properties and they are used for bushings, rollers, rings, and pulleys, etc. They are all in their own applications strong plastics.
Can UHMW be welded?
Yes, it can, but UHMWPE can only weld the same material, if for other materials like HDPE, then it is not possible.
Can you bend UHMW with a heat gun?
If the thinner UHMWPE sheets ( thickness under 10 mm ) can be bent with the screws, a heat gun helps too.
What will stick to UHMW?
If want to stick some different materials to UHMWPE, need to use special binders, then can stick Delrin, rubber, polyethylene, wood, metals, glass, and concrete to UHMWPE.
Can UHMW be drilled?
Yes, when molding the UHMWPE raw material into sheets, then it can be drilled with different size holes or different depth grooves.
Does UHMW absorb water?
We can treat UHMWPE material and its thermoplastic plastic sheets with 0 water absorption. That is why the UHMWPE liners are popular in truck and coalbin and hopper linings because they will not absorb water and not moisture absorption. So will not adhere to any materials to make the bock up the problem.
How do you glue UHMW to UHMW?
1. Wipe the oil stain or dust on the material name with rags first.
2. Use a brush or scraper to evenly brush the plastic glue on the UHMWPE sheet to be glued after treatment. The glue should be applied evenly in thickness and in place, without leaving blind spots. Apply adhesive on both sides if necessary.
3. After the glue is applied, it should be left in the air for 5 to 8 minutes (it is better to touch the glue without drawing), and then it should be pressed to make the two sides fit properly.
4. The fitting will have a certain strength immediately. The watch will dry for about 2 hours, and the strength will be measured after 24 hours.
What is the difference between white and black UHMW?
Usually, the UHMWPE granule or power is transparent, it has no color, when mixing the certain color master batch into raw material, then it can make different color sheets. White color sheets are must pure and virgin material, but black color sheets may be virgin, or maybe recycled.
How much does a sheet of UHMW cost?
UHMW or UHMWPE sheets’ prices are different, it depends on their size and thickness. Generally, we calculate it per kg.
Is UHMW self-lubricating?
Yes, it is. UHMWPE does not like steel, and needs to add lubricating oil, it can work naturally with very good self-lubricating and has an extremely low friction coefficient.
Does UHMW have a shelf life?
Under normal storage, the UHMW products can keep good property within 5-10 years.
Can you cut UHMW with a circular saw?
Yes, we can. unlike polypropylene, UHMW does not melt when you cut it, so the”chips” remain soft. The material does tend to collect on the saw blade, which will throw the material up as it is cut, so we will use a blade guard.
Can you cut UHMW with a water jet?
Yes, we can. Water jet cutting is the preferred method for us to manufacture UHMWPE parts.
Do you grease UHMW bushings?
No, UHMWPE material has a very good self-lubricating property, it does not need any oil to grease.