Process for the preparation of amorphous, highly oriented polyethylene filaments
A high-density polyethylene, high-orientation technology, applied in the direction of single-component polyolefin artificial filament, artificial filament physical therapy, melt spinning, etc., can solve the problem of broken warp and weft, difficult weaving, high-strength and high-modulus polyethylene fiber The problem of small elongation at break, etc., achieves the effect of simple process
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Embodiment 1
[0018] A method for preparing amorphous and highly oriented polyethylene filaments by adopting high-density polyethylene raw materials and utilizing multiple hot drawing and quenching treatment technologies, comprising the following steps:
[0019] 1) The high-density polyethylene masterbatch is sprayed out from the spinneret through the hopper of the melt spinning machine, and drawn by 3 times to obtain a spun silk with a crystallinity of about 60% and an orientation degree of about 10%;
[0020] The molecular weight of the polyethylene masterbatch is 50,000; the temperature of each zone of the melt spinning machine is controlled at 140°C, 150°C, 155°C, and 175°C;
[0021] 2) Send the as-spun filaments ejected from the spinneret into a heat treatment tunnel with a temperature of 80°C, and at the same time give it a 10-fold draft, and quickly enter a low-temperature water bath tunnel at 15°C for quenching treatment to obtain a crystallinity of about 40%. , the degree of orient...
Embodiment 2
[0026] A method for preparing amorphous and highly oriented polyethylene filaments by adopting high-density polyethylene raw materials and utilizing multiple hot drawing and quenching treatment technologies, comprising the following steps:
[0027] 1) The high-density polyethylene masterbatch is sprayed out from the spinneret through the hopper of the melt spinning machine, and drawn by 4 times to obtain a spun silk with a crystallinity of about 65% and an orientation degree of about 15%;
[0028] The molecular weight of the polyethylene masterbatch is 200,000; the temperature of each zone of the melt spinning machine is controlled at 145°C, 155°C, 175°C, and 190°C;
[0029] 5) Send the as-spun filaments from the spinneret into a heat treatment tunnel with a temperature of 90°C, and at the same time give 8 times the draft, and quickly enter the low-temperature water bath tunnel at 20°C for quenching treatment to obtain a crystallinity of 45%. The degree of orientation is 40% a...
Embodiment 3
[0034] A method for preparing amorphous and highly oriented polyethylene filaments by adopting high-density polyethylene raw materials and utilizing repeated thermal drawing and quenching treatment technology, comprising the following steps:
[0035] 1) The high-density polyethylene masterbatch is sprayed out from the spinneret through the hopper of the melt spinning machine, and drawn by 5 times to obtain a spun silk with a crystallinity of about 70% and an orientation degree of about 15%;
[0036] The molecular weight of the polyethylene masterbatch is 500,000; the temperature of each zone of the melt spinning machine is controlled at 150°C, 170°C, 180°C, and 210°C;
[0037] 8) Send the as-spun filaments ejected from the spinneret into the heat treatment tunnel with a temperature of 80°C, and at the same time give it a 5-fold draft, and quickly enter the low-temperature water bath tunnel at 13°C for quenching treatment to obtain a crystallinity of about 50%. , the degree of ...
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Abstract
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