Polyethylene Moisture in Plastic Strip/Fastener Manufacturing Critical in Winding and Binding Processes

PE Chemical Structure

Polyethylene ((C2H4)nH2) Plastic Resin

Plastic strips are fabricated in a continuous process into specific shapes based on application.  Generally any long, narrow, solid plastic shape is likely to be considered a strip.  Strips are found in new re-sealable applications every day from sandwich bags, chips, and many others.  Moisture control is critical prior to wind up because moisture impacts proper winding and binding characteristics to other materials at the end converter.  Improper moisture levels will cause expansion and contraction of the product roll which will then cause problems in the end user’s unit operations or unraveling.

A Near Infrared Moisture Transmitter is often complemented with a Thermal Imaging System to completely characterize the process.  The Near IR Moisture Transmitter communicates with a Programmable Logic Controller (PLC) and outputs data history to an archiving PC.  The PLC controls strip moisture via an air blower.  Moisture ranges from 0.2 to 0.6% with targets usually around 0.4 to 0.5%.

Process Sensors MCT Series of Near IR Moisture Transmitters meet this need in the manufacturing of plastic strips.  Process Sensors IR Division features Thermal Imaging Systems.

PE Moistures

PE Lab vs. MCT Moisture

 

PE Moisture Control

PE Moisture Before and After Air Blower with Moisture Measurement and PLC Control

 

PE Sandwich Bag Strip

Zip Bag

PE pellets

Polyethylene Pellets