Wire and cable insulation
A technology for insulators and cables, applied in the direction of conductor/cable insulation, insulators, insulated conductors, etc., can solve the problem that halogen-free compounds have poor chemical resistance and environmental resistance, and it is difficult to meet both electrical and flammability requirements. flammability standards and other issues, to achieve the effect of saving costs
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[0031] A second aspect of the present invention is to provide a method for preparing an insulated wire or cable, wherein the insulator is a halogen-free insulator comprising at least an inner layer and an outer layer; the outer layer comprises uncoated magnesium hydroxide; the method includes directly The step of coextruding insulation on wire or cable.
[0032] A third aspect of the present invention is to provide a method for preparing an insulated wire or cable, wherein the insulator is a halogen-free insulator comprising at least an inner layer and an outer layer; the outer layer comprises uncoated magnesium hydroxide; the method comprises the following steps: The inner layer, outer layer and any additional intermediate layers are sequentially extruded on the wire or cable.
[0033] Thus forming a stable dual or multi-layer insulator, preferably the layers of the insulator form a firm bond during the manufacture of the insulator. The combination may be chemical or mechani...
Embodiment 1
[0039] at 0.75mm 2 Coextruded insulation comprising inner and outer layers on gauge wire. The thickness of both the inner layer and the outer layer is 0.15 mm.
[0040] The inner layer comprises 30wt% polypropylene copolymer; 52wt% high-density polyethylene; 9wt% thermoplastic elastomer; 4wt% antioxidant package (high molecular weight phenolic antioxidant (hydroxyphenylpropionate stabilizer), thiopropylene acid ester stabilizer and zinc sulfide); and 5 wt% commonly used include crosslinking accelerators, copper stabilizers (hydroxyphenylpropionate-propionylhydrazide and zinc sulfide), pigments (pigments in PE / PP based carriers) and processing aids (polysiloxane processing aids).
[0041] The outer layer comprises 16 wt% polypropylene copolymer; 9 wt% primary elastomer; 5 wt% secondary elastomer; 60 wt% uncoated magnesium hydroxide with an average particle size of 15 μm; 4 wt% antioxidant package (high molecular weight phenolic Antioxidants (hydroxyphenylpropionate stabilize...
Embodiment 2
[0044] at 0.75mm 2 The insulator including the inner layer and the outer layer is sequentially extruded on the gauge wire. The thickness of both the inner layer and the outer layer is 0.20 mm.
[0045] The composition of the inner layer is consistent with Example 1, the outer layer comprises 5 wt% polypropylene copolymer; 24 wt% catalytic alloy (cataloy) (ethylene-propylene alloy) with an MFI of about 0.8; 61 wt% uncoated Magnesium hydroxide; 4 wt% antioxidant package (high molecular weight phenolic antioxidant (hydroxyphenylpropionate stabilizer), thiopropionate stabilizer and zinc sulfide); and 6 wt% containing crosslinking accelerator, copper Common minor ingredients for stabilizers (hydroxyphenylpropionate-propionohydrazide and zinc sulfide), pigments (pigments in PE / PP based carriers) and processing aids (polysiloxane processing aids).
[0046] This insulated wire is suitable as automotive wiring that meets the requirements of "Class 3", which requires 3000 hours of goo...
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