Extrusion & Post
6 görüntüleme
Cross-linked polyethylene XLPE insufficient crosslinking degree
Sorun Belirtisi
The crosslinking degree of XLPE products cannot reach the requirement of 60-80%, and the gel content is low.
Insufficient crosslinking degree affects the heat resistance and creep resistance of products, and products deform severely at high temperatures.
Neden Analizi
(1) Peroxide addition insufficient or unevenly dispersed
(2) Crosslinking temperature too low or crosslinking time insufficient
(3) Peroxide decomposed prematurely (extrusion temperature too high)
(4) Irradiation crosslinking dose insufficient
(5) Silane crosslinking catalyst activity decreased
Çözüm
(1) Accurately meter peroxide dosage, ensure uniform dispersion
(2) Strictly control the crosslinking temperature and crosslinking time window
(3) Reduce extrusion temperature to 170-200°C to prevent premature peroxide decomposition
(4) Irradiation crosslinking ensures dose rate, total dose meets requirements
(5) Silane crosslinking checks catalyst and warm water crosslinking conditions (80-95°C water bath)
Temel Çıkarım
The main cause of insufficient crosslinking degree is insufficient crosslinking agent dosage or improper crosslinking conditions, and strict control is needed from both formulation and process.
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