nylon pa12 Description
Because characteristics of determine that its extrusion process must use a special extruder for nylon pa12 mutant screw, PA-12 can be extruded by a common extruder. This paper is mainly for large-section single-core power cable (for example, 1×240mm2 and above) exported by our company in Australia in 2007; and development of multi-core large-diameter power cable (such as 1×240mm2/3×240mm2). product requirements are waterproof, termite resistant, UV resistant and high mechanical strength. It is mainly used in coastal areas. contract requires nylon pa12 as inner sheath and PVC as outer sheath. extrusion of PA-12 sheath (or inner sheath), especially large-diameter sheath (inner sheath) is rarely reported in China. It is also a technical difficulty for company. refore, this paper uses φ120, For example, φ150 ordinary extruder extrusion power cable PA sheath is used as an example to discuss process parameters such as extrusion die design and extrusion temperature selection. problems encountered in production are analyzed, and some measures and precautions are proposed. 1 Extrusion characteristics of PA-12 Table 1 shows main properties of nylon pa12.
main extrusion characteristics of nylon pa12 are as follows. 1.1 It must be dried before extrusion. PA-12 contains an amide group. It belongs to a polar structure and has a hydrophilic gene. It is easy to absorb moisture. It is placed in water at normal temperature. water absorption saturation rate is about 1.6%. If it is at 50%. At a relative humidity, water absorption is about 0.7%. According to production experience, when water content of nylon pa12 exceeds 0.2%, extrusion is not smooth, and when it exceeds 0.5%, surface of sheath may have defects such as foaming, fuming or hard particles.
nylon pa12 show
nylon pa12 properties
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