Engineering industry fiber for near-infrared identification and manufacturing method thereof

Abstract

A method for manufacturing engineered industrial fibers for near-infrared identification includes the following steps: Heating a polymer material and a near-infrared material to form a melt at a temperature not exceeding 290°C. Extruding the melt through a spinneret to form a filament, the spinneret having an orifice diameter of 0.6 mm to 1.2 mm. Cooling the filament with a cooling air at a temperature of 20°C to 65°C to form a fiber. Stretching the fiber to form engineered industrial fibers for near-infrared identification, the fiber having a draw ratio of 5.3 to 6.0. The engineered industrial fibers for near-infrared identification are medium-coarse to coarse fibers, suitable for webbing, ropes, industrial fabrics, etc., with a fiber strength greater than 7 g / denier and a fiber fineness of 250 denier to 2000 denier. The transmittance for near-infrared light at a wavelength of 940 nm is 60% to 5%, or the reflectance is 120% to 150%.

Claims

1. An engineered industrial fiber for near-infrared identification, comprising: A polymeric material, comprising polyester, polyamide, or a combination thereof; And a near-infrared functional material, distributed in the polymer material, the near-infrared functional material including a near-infrared absorbing material, a near-infrared reflecting material or a combination of absorbing and reflecting materials, wherein the near-infrared identifiable engineered industrial fiber has a fiber strength greater than 7 g / denier, a transmittance of 60% to 5% or a reflectance of 120% to 150% for a near-infrared wavelength of 940 nanometers, and a fiber fineness of 250 denier to 2000 denier.

2. The engineered industrial fiber for near-infrared identification as described in claim 1, wherein the near-infrared absorbing material includes tungsten oxide, carbon black, graphite, graphene, lanthanum hexaboride, indium tin oxide, antimony-doped indium tin oxide, or combinations thereof.

3. The engineered industrial fiber for near-infrared identification as described in claim 1, wherein the near-infrared reflective material includes organic nitrogen, iron-chromium oxide, iron-chromium-cobalt oxide, iron-chromium-nickel oxide, cobalt-copper-aluminum-manganese oxide, lanthanum-strontium-calcium-manganese oxide, iron oxide, or a combination thereof.

4. An engineered industrial fiber for near-infrared identification as described in any one of claims 1 to 3, wherein the near-infrared identification fiber is an engineered industrial fiber used in a ground fabric, an industrial safety rope webbing, a parachute rope webbing, a vehicle seat belt weaving, a vehicle airbag, and a high-strength sewing thread.

5. An engineered industrial fiber for near-infrared identification as described in any one of claims 1 to 3, wherein the near-infrared identification fiber is combined with a conventional industrial yarn, and a near-infrared night vision camera is used to photograph a dark yarn area and a light yarn area in the combination, wherein the brightness of the dark yarn area is Idark, the brightness of the light yarn area is Ilight, and the difference between the brightness of the dark yarn area and the brightness of the light yarn area is obtained according to a brightness contrast calculation formula (Ilight+0.05) / (Idark+0.05), and the brightness contrast is 1 or more.

6. A method for manufacturing engineered industrial fibers for near-infrared identification, comprising: Heating a polymer material and a near-infrared material to form a melt, wherein the melting temperature is not higher than 290°C; The melt is extruded through a spinneret to form a filament, the spinneret having a spinneret orifice diameter of 0.6 mm to 1.2 mm and an aspect ratio of 1 / 1 to 20 / 1; the filament is cooled by a cooling air at a temperature of 20°C to 65°C to form a fiber; and the fiber is stretched to form an engineered industrial fiber with a near-infrared spectral density of greater than 7 g / denier, wherein the fiber has a draw ratio of 5.3 to 6.

0.

7. The method as described in claim 6 further includes applying an oiling agent to the fiber after the yarn has been cooled by the cooling air to form the fiber, wherein the oiling rate of the fiber is 0.4% to 1.8%.

8. The method as described in claim 6, wherein the heat setting temperature of the fiber is 205°C to 235°C.

9. The method as described in claim 6, wherein when the fiber is stretched, a winding speed of the fiber is between 2750 m / min and 3200 m / min.

10. The method as described in any one of claims 6 to 9, wherein the relative humidity of the cooling air is 60% to 100%.

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