Semi-dull chinlon 66 industrial yarn and preparation method thereof

Abstract

The invention discloses a semi-dull chinlon 66 industrial yarn and a preparation method thereof. The preparation method comprises the following steps: (1) putting a slice into a drying tower for drying and tackifying; (2) humidifying the slice, so as to reach optimal moisture content and viscosity; (3) putting dehydrated semidull master batches and the slice into a screw extruder in a mixing manner for heating, so as to obtain melt; (4) putting the melt into a spinning component, metering the melt by a metering pump, filtering the melt with a filter device and spinning with a spinneret plate at high pressure; (5) putting trickle of melt spun by the spinneret plate into a spinning channel for cooling, so as to form a tow; (6) applying oil on the cooled tow with an oil application roller; (7) drafting and setting the tow with six pairs of hot rollers; (8) interlacing the drafted and set tow with an interlacing jet; (9) winding the drafted and set tow with eight pieces of winding equipment. According to the prepared semi-dull chinlon 66 industrial yarn, the hot-shrinkage rate is 5.5-7.5%, the denier is 150-840D, the breaking strength is more than or equal to 8.8g / D, and the elongationat break is 18-24%.

Description

technical field [0001] The invention relates to the field of nylon spinning, in particular to a semi-dull nylon 66 industrial yarn and a preparation method thereof. Background technique [0002] Gloss is a characteristic of fibers such as polyester, nylon, and acrylic. The woven fabric is glossy, but the reflective effect of this gloss is too glaring, so it needs to be matted. Matting is to add a matting agent to the spinning solution to destroy the surface of the fiber, so that the surface of the fiber produces irregular reflection of light to achieve the purpose of matting. At present, most of the matting fibers in the market are polyester and nylon 6, but nylon fibers are mostly Flexibility, elastic recovery rate, abrasion resistance, alkali resistance, moisture absorption and light weight are better than polyester fiber, but its cost is about twice that of polyester fiber, and nylon 66 is more expensive than nylon 6 is 20~40% higher. Compared with nylon 66, polyester an...

AI Technical Summary

Problems solved by technology

Matting is to add a matting agent to the spinning solution to destroy the surface of the fiber, so that the surface of the fiber produces irregular reflection of light to achieve the purpose of matting. At present, most of the matting fibers in the market are polyester and nylon 6, but nylon fibers are mostly Flexibility, elastic recovery rate, abrasion resistance, alkali resistance, moisture absorption and light weight are better than polyester fiber, but its cost is about twice that of polyester fiber, and nylon 66 is more expensive than nylon 6 is 20~40% higher. Compared with nylon 66, polyester and nylon 6 have defects in breaking strength and elongation at break, and their wear resistance is not good. Therefore, compared with high-end wire harness customers, they believe and expect matting The emergence of nylon 66 filaments to fill the gaps, compared to the matt nylon 66 industrial yarn, semi-dull nylon 66 industrial yarn feels smoother, the color is brighter, durable, and the price is moderate

[0003] With people's urgent demand for high-grade, thin and transparent clothing fabrics, the market demand for semi-dull nylon 66 industrial yarn is increasing. At present, the common production method of semi-dull industrial yarn is to use semi-dull slices as raw materials. It is produced by melt spinning. However, in the production process of the semi-dull chip raw material, complex pretreatment of the matting agent titanium dioxide is required before it can be added to the polymer melt. It is difficult to meet the production requirements of industrial yarns with different matting degrees. The high-strength filaments in the existing production process have a single variety, low spinning speed, long residence time in the screw and spinning box after the slices are melted, large viscosity loss, many broken ends of floating filaments, low spinning tension, difficult spinning, and difficult weaving. The resulting fabric lacks softness, poor molding, and poor dyeing performance