UHM-PE

Serious consideration of this material

UHMW-PE stands for Ultra High Molecular Weight 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 difficult applications. Ultra High Molecular Weight is the secret of this polymer’s unique properties. Its high-density polyethylene resin has a molecular weight range of 3 to 6 million, compared to 300,000 to 500,000 for high molecular weight (HMW) resins. That difference is what ensures that this material is strong enough to withstand abrasion and impact better than lower level poly products. UHMW-PE’s high molecular weight means it will not melt or flow as a molten liquid. Processing methods are therefore derived from those of powder metal technology. UHMW-PE cannot be transformed and molded 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.

WHAT IS TIVAR®?

TIVAR® is the brand name (from Poly-Hi) for a special formulation of ultra high molecular weight polyethylene (UHMW-PE). UHMW-PE is a unique family of high-density polyethylene with a molecular weight 3 million or higher. UHMW-PE is a high performance polymer with a high melt viscosity that can be extruded, fabricated or compression molded.

WHAT DOES TIVAR® STAND FOR?

TIVAR® is an acronym for Tough Inert Very Abrasion Resistant.

WHAT ARE THE KEY PROPERTIES OF TIVAR® UHMW-PE?

TIVAR® is known for its high abrasion resistance, natural lubrication, high impact strength, chemical-, corrosion-, and moisture-resistance and acoustic impedance.

WHY USE TIVAR®?

Due to its abrasion-, corrosion-, chemical- and moisture-resistant properties, TIVAR® is commonly used in applications where conditions may be too harsh for other materials. It is a cost-effective high performance polymer used to produce low cost, high quality parts.

HOW DOES TIVAR® COMPARE TO OTHER MATERIALS?

In most cases, TIVAR® will out-wear materials such as Nylon, Teflon® or Acetal. It can also outperform metals such as steel and aluminum when used in the proper applications. Material performance is of course dependent on the specific environmental conditions.

WHERE IS UHMW USED?

UHMW is a self-lubricating material which exhibits excellent wear and abrasion properties as well as adding extremely high impact strength. A few of the markets which would utilize these attributes would be snowboard bottoms, package handling, packaging, food processing and automotive.

WHAT ARE THE BENEFITS OF UHMW-PE?

The high molecular weight is what gives UHMW-PE a unique combination of high impact strength efficient of friction and abrasion resistance that outwears carbon steel 10 to 1 making it more suitable for applications where lower molecular weight grades fail.

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