Does polyethylene have cross-linking?
Cross-linked polyethylene (XLPE) is a thermosetting resin with three types of cross-linking: peroxide cross-linking, radiation cross-linking, and silane cross-linking.
How is cross-linked polyethylene made?
Cross-linked polyethylene is high-density polyethylene that is manufactured by adding a catalyst to the thermoplastic resin, which turns it into a thermoset. The catalyst causes covalent bonds that link the molecules together. Picture a chain-link fence where the metal links are actually bonded or welded together.
What is silane XLPE?
Silane XLPE compound – one step technology – with KTT100PA code is a main product of PolyCom that mainly made of imported high-quality LLDPE and other suitable addictives such as: cross-linking agents, antioxidant, heat stabilizer, etc.
How do you make compound XLPE?
There are two competitive processes for compounding of XLPE: Soaking of Dicumyl Peroxide in molten stage on Clean filtered LDPE. Direct injection of DCP and AO in molten LDPE followed by screening before granulation.
What is highly cross-linked polyethylene?
Background: Highly cross-linked polyethylene (XLPE) was developed to address the problem of wear and osteolysis associated with metal-on-conventional ultra-high molecular weight polyethylene (UHMWPE) bearing surfaces.
What is Sioplas technology?
In the Sioplas process, Polyethylene is first grafted in the presence of a mixture of Vinylsilane and peroxide to make a crosslinkable polyethylene. The material can be either processed directly or stored in dry conditions for up to several months.
What is XLPE compound?
XLPE compound is a Cross-linked polyethylene, commonly abbreviated PEX or XLPE, is a form of polyethylene with cross-links.
What is the full form of XLPE cable?
XLPE cable stands for cross linked polyethylene cable. It is a hydronic tubing manufactured from polyethylene plastic.
Why is polyethylene harmful?
Plastics #1 Polyethylene terephathalate (PET or PETE) & #2 HD Polyethylene (HDPE) are not only bad for our environment but can be potentially toxic to humans too, these are also known as single use plastics, and may leach when exposed to UV, heat and over time from natural breakdown.
Which is better silane cross linking or Sioplas?
Different techniques of silane cross-linking, i.e., the “one step” Monosil ® process and the “two-step” Sioplas ® process have been discussed with more emphases on Sioplas ® process, as it is less expensive and readily achievable. The grafting step which is performed by reactive processing is the major and key process in Sioplas ® technique.
Which is the best way to cross link polyethylene?
Free-radical grafting of unsaturated hydrolyzable alkoxy-silanes onto polyethylene chains by a peroxide initiator followed by moisture cross-linking is the most versatile cross-linking method and may be successfully used for other thermoplastics as well.
Which is the major process in the Sioplas technique?
The grafting step which is performed by reactive processing is the major and key process in Sioplas ® technique. The state-of-the-art of a two-step silane grafting and cross-linking has been presented.
Can you use the two step silane method?
Although this review is aimed at silane method of spectives of the more recent methods, especially the two-step silane method. Free- linking method and may be successfully used for other thermoplastics as well. Sioplas ®process, as it is less expensive and readily achievable.