公开(公告)号：US20240314889A1

公开(公告)日：2024-09-19

申请号：US18266412

申请日：2020-12-15

Applicant: BOREALIS AG

Inventor： Per-Ola HAGSTRAND ,  Niklas THORN ,  Anette JOHANSSON ,  Mikael KREVERS

IPC: H05B3/14 ,  H01B3/44 ,  H05B3/36

CPC classification number: H05B3/146 ,  H01B3/441 ,  H05B3/36

Abstract: A flat sheet electrical heater, preferably obtainable by coextrusion, comprising: a plurality of elongate conductors evenly spaced apart from and substantially parallel to each other, said conductors being embedded within and in contact with an electrically semiconductive composition with a positive temperature coefficient comprising a polyethylene, polypropylene or a mixture thereof and a conductive filler wherein the distance between elongate conductors is 20 to 150 mm, wherein said conductors are preferably parallel with the machine direction of the semiconductive composition.