Sewing thread with high softening point, preparation method and application of same
A high softening point, sewing thread technology, applied in the field of sewing thread, can solve the waste, loss, time-consuming and other problems of polypropylene cloth recycled materials, and achieve the effect of simple and feasible preparation process, good compatibility characteristics, and outstanding optical properties
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[0025] Example 1
[0026] In the mixer, 3kg of polypropylene, 2kg of poly-4-methyl-1-pentene, 100g of antioxidant 1010, and 50g of zinc stearate were sequentially added, and the mixing speed of the mixer was 100rpm to obtain a mixture. Feed the above-mentioned mixture into a twin-screw melt spinning machine for melt extrusion and spinning forming to obtain a sewing thread with a high softening point. Among them, the heating temperature of the twin-screw melt spinning machine is 180℃, 200℃, 220℃, 240℃, 240℃, 200℃; the melt pressure is 8 Mpa ~ 15Mpa, the spinning speed is 400m / min, and the draft ratio is 4 ~6 times, hot plate temperature 60℃~80℃, hot plate temperature 110℃~130℃; sewing thread with high softening point is made.
[0027] In this embodiment, polypropylene / poly-4-methyl-1-pentene is used for melt blending to spin a sewing thread with a high softening point. Poly-4-methyl-1-pentene is a new type of polyolefin material with outstanding optical properties, mechanical prop...
Example Embodiment
[0028] Example 2
[0029] In the mixer, add 2.5kg polypropylene, 2.5kg poly-4-methyl-1-pentene, 80g antioxidant 1010, 20g zinc stearate in sequence, and the mixing speed of the mixer is 100rpm to obtain a mixture. Feed the above-mentioned mixture into a twin-screw melt spinning machine for melt extrusion and spinning forming to obtain a sewing thread with a high softening point. The heating temperature of the twin-screw melt spinning machine is 180℃, 200℃, 230℃, 250℃, 250℃, 210℃, the melt pressure is 8 Mpa ~ 15MPa, the spinning speed is 300m / min, and the draft ratio is 3~4 Double, hot plate temperature is 60℃~80℃, hot plate temperature is 110℃~130℃; sewing thread with high softening point is obtained.
[0030] The properties of the sewing thread obtained are shown in the table below:
[0031] project Breaking strength / (g / d) Softening temperature (℃) Example 14.7128 Example 2 4.2140
[0032] In this embodiment, polypropylene / poly-4-methyl-1-pentene is used for melt blending to ...
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