Manufacturing method for low-shrinkage high-strength PET industrial yarn
A high-strength polyester and manufacturing method technology, applied in the field of polyester industrial yarn manufacturing, to achieve the effects of reducing cooling rate, low linear density deviation rate, and avoiding local concentration
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Embodiment 1
[0036] The high-viscosity molten polyester raw material refers to PET high-viscosity slices with an intrinsic viscosity of 1.0dl / g;
[0037] The cooling includes four parts of slow cooling, pre-cooling, cooling in the windless zone and blowing cooling in turn;
[0038] The slow cooling refers to that the ambient temperature of the tow is 260°C, the temperature of the tow at the exit of the slow cooling zone is 280°C, and the slow cooling height is 250mm.
[0039] The pre-cooling refers to that the ambient temperature of the tow is 160° C., and the temperature of the tow at the outlet of the pre-cooling zone is 250° C.; the pre-cooling height is 60 mm.
[0040] The cooling in the windless zone means that the ambient temperature of the tow is 120° C., and the temperature of the tow at the exit of the windless zone is 230° C.; the cooling height in the windless zone is 200 mm.
[0041] The wind temperature of the blowing cooling is 15°C; the blowing cooling is side blowing cooli...
Embodiment 2
[0046] The high-viscosity molten polyester raw material refers to high-viscosity slices with an intrinsic viscosity of 1.2dl / g.
[0047] The cooling includes four parts of slow cooling, pre-cooling, cooling in the windless zone and blowing cooling in turn;
[0048] The slow cooling refers to that the ambient temperature of the tow is 300°C, the temperature of the tow at the exit of the slow cooling zone is 285°C, and the slow cooling height is 300mm.
[0049] The pre-cooling refers to that the ambient temperature of the tow is 260° C., and the temperature of the tow at the outlet of the pre-cooling zone is 260° C.; the pre-cooling height is 80 mm. The pre-cooling is active outer ring sequential pre-cooling; the active outer ring sequential pre-cooling refers to sending hot air through the active outer ring sequential device to cool the filaments; the active outer ring The ring sequence device is a hollowed-out sequential annular belt, and the circumferential direction of the ...
Embodiment 3
[0056] The high-viscosity molten polyester raw material refers to high-viscosity slices with an intrinsic viscosity of 1.1 dl / g.
[0057] The cooling includes four parts of slow cooling, pre-cooling, cooling in the windless zone and blowing cooling in turn;
[0058] The slow cooling refers to that the ambient temperature of the tow is 270° C., the temperature of the tow at the exit of the slow cooling zone is 281° C.; the height of the slow cooling is 260 mm.
[0059] The pre-cooling refers to that the ambient temperature of the tow is 170° C., and the temperature of the tow at the outlet of the pre-cooling zone is 252° C.; the pre-cooling height is 65 mm. The pre-cooling is active outer ring sequential pre-cooling; the active outer ring sequential pre-cooling refers to sending hot air through the active outer ring sequential device to cool the filaments; the active outer ring The ring sequence device is a hollowed-out sequential annular belt, and the circumferential directio...
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