Fluoropolymers: technology and processes

Next paper (20th of September 2018): cleaning procedures for standard compounds, fluoropolymers and technopolymers.   The fluoropolymers or fluorocarbon resins are special compounds for special application where high performances, in terms of working temperature, electrical property, chemical resistance, are required. The fluoropolymer can be chosen according to the application field and property required. The fluoropolymers […]

Read More

Crossheads and process

Crosshead is definitely the most important component in the cable production cycle. It acts on the production efficiency and on the cable quality. In order to produce a high-performing crosshead it is strictly important to own a specific know-how on plastic materials and on extrusion process for cable production. There are two main factors in […]

Read More

THHN cables and cables with PA jacketing

INTRODUCTION The THHN Cable (Thermoplastic High Heat Resistant Nylon) is a kind of cable with insulation PVC and PA6 jacketing. The cable can be produced by: coextrusion process; tandem process. THHN CABLE PRODUCTION CO-EXTRUSION TANDEM Triple layer head PVC+Nylon Dual layer Head for PVC PA Jacketing Head 1. TANDEM PROCESS The line is composed by […]

Read More

Tools: how to choose them

The quality of the cable depends not only on the head and tools used but even on the other process parameters: Extruder, Screw design, Barrel, thermoregulation, etc. Temperature profile into the extruder and head Cooling Mode of the cable after the X-Head, water temperature, etc. Tensioning Device/mode of the cable, Etc. The extrusion head is […]

Read More

Die drool, die swell, lump, surface quality

The plastic materials are Non-Newtonian material and they are defined Pseudo-Newtonian materials. They are considered Viscoelastic materials. This can be explained by Kelvin and Maxwell model so by system of springs and viscous dumpers.     The viscoelasticity of the polymers plays a fundamental role in the extrusion operation and process: Die Drool; Die Swell; […]

Read More