Flexible cable with sheath and preparation method thereof
A flexible cable and sheath type technology, used in cable/conductor manufacturing, insulated cables, cables, etc., can solve problems such as cable breakdown, water tree branches in the insulation layer, and cable aging.
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[0060] The present invention has no special limitation on the preparation method of the double-sided hot-melt polyester tape, and any method known to those skilled in the art will suffice.
[0061] In some specific embodiments of the present invention, the number of layers of the double-sided hot-melt polyester tape is two.
[0062] In the present invention, the tensile force of the hot-melt polyester tape should be greater than 100N, and the elongation at break should be greater than 60%.
[0063] The present invention also provides a method for preparing a sheathed flexible cable, comprising the following steps:
[0064] The insulated core is wrapped or dragged with a hot-melt polyester tape, and then the sheath layer is extruded, and after cooling, a sheathed flexible cable is obtained.
[0065] First, the insulated wire core is wrapped or wrapped with a hot-melt polyester tape, and the covering rate of the wrapped or dragged hot-melt polyester tape is 0% to 10%.
[0066]...
Embodiment 1
[0085] The structure of the double-sided hot-melt polyester tape includes a PET substrate film layer with a thickness of 0.017mm, an inner hot-melt adhesive layer with a thickness of 0.003mm in contact with the insulating layer and a thickness of 0.008mm in contact with the sheath layer. mm outer hot melt adhesive layer.
[0086] The inner hot melt adhesive layer is prepared from the following raw materials in parts by weight:
[0087] 98 parts by weight of polyurethane, 0.5 parts by weight of nano-calcium carbonate reinforcing agent, 0.2 parts by weight of diphenylamine, 0.2 parts by weight of polycarbodiimide, 0.05 parts by weight of dibutyl hydroxytoluene, and acetone of 0.05 parts by weight;
[0088] The outer hot melt adhesive layer is prepared from the following raw materials in parts by mass:
[0089] 90 parts by weight of polyurethane, 2 parts by weight of polyolefin, 1 part by weight of dicumyl peroxide, 1 part by weight of nanometer calcium carbonate reinforcing age...
Embodiment 2
[0092] The structure of the double-sided hot-melt polyester tape includes a PET base film layer with a thickness of 0.017mm, an inner hot-melt adhesive layer with a thickness of 0.003mm in contact with the insulating layer and a thickness of 0.008mm in contact with the sheath layer. mm outer hot melt adhesive layer.
[0093] The inner hot melt adhesive layer is prepared from the following raw materials in parts by weight:
[0094] 99 parts by weight of polyurethane, 0.9 parts by weight of nano-calcium carbonate reinforcing agent, 0.5 parts by weight of diphenylamine, 0.5 parts by weight of polycarbodiimide, 0.1 parts by weight of dibutyl hydroxytoluene, and 0.1 parts by weight of acetone;
[0095] The outer hot melt adhesive layer is prepared from the following raw materials in parts by mass:
[0096] 95 parts by weight of polyurethane, 4 parts by weight of polyolefin, 2 parts by weight of dicumyl peroxide, 1.9 parts by weight of nano-calcium carbonate reinforcing agent, 0.5 ...
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