Category Archives: Rheology Control

Long Chain Branching, Part 3 – Demonstrating Improved Drawability

In Part 2, we irradiated three samples of LLDPE with the electron beam to impart long chain branching and we achieved the improvement in melt tension we were looking for. In Part 3, we irradiated one of the samples with a higher dose to produce LCB (long chain branched) LLDPE with a melt tension measurement […]

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Long Chain Branching, Part 2 – Experimental results

Hypothesis:  long chain branching of LLDPEs can improve melt strength in terms of drawability.  We irradiated 3 LLDPE feedstocks with an electron beam and compared the properties of the 3 processed resins to a LDPE Control.  The starting samples were: Radiation Processing We dosed the samples with a 150kW, 4.5 MeV electron beam accelerator.  The […]

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Long Chain Branching – Background. Part I

This is the first of a three part series highlighting the advantages of long chain branching and crosslinking – – valuable modifications made by electron beam treatment. History Linear low density polyethylene (LLDPE) has been used in extrusion coating and blown film since the 1950s, where its excellent melt strength created new possibilities. Polypropylene (PP) […]

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At home with electrons

At this point, if you’ve read through a number of our blog entries you might be thinking, “Okay, this electron beam thing is REALLY cool, but I’m not a medical device manufacturer or a resin supplier, so it doesn’t really affect me.” In actuality, you might be surprised to learn that products modified by electron […]

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The Story of E-BEAM Services: Crosslinking

We are E-BEAM Services, we are committed to the power of electrons, and we are crosslinking. In the video below, you will learn about the history of crosslinking at E-BEAM and how we are the industry leaders in the changing the material properties of polymers in order to create a superior product.     Transcript […]

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5 Common Questions About Rheology

When you e-beam polyethylene resin pellets, won’t there be gels? This is often one of the first questions asked in regards to e-beam processing in relation to changing the rheology of polymers. The concern is that with the e-beam irradiation, crosslinking is occurring and therefore hard gels are being formed. However, at low doses, before crosslinking […]

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What is chain branching?

Crosslinking of polymers via electron beam irradiation (e-beam) is  well known and the number of success stories involving it touch our daily lives in many ways – but more on that in a later blog. An important similar concept that might be a little less familiar to some is the process of chain branching. What […]

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What can I expect from E-BEAM as a company?

Let me tell you a story. In June of 2013, I was standing in our booth at the MD&M show in Philadelphia when I turned to face a stately looking gentleman holding some sort of medical device in his hand. He was shaking his head, saying “you sterilization guys have a history of horrible service.” […]

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