Flame-retardant anti-molten-drop chinlon 6 filament production method

Abstract

The invention discloses a production method of flame-retardant and droplet-resistant nylon 6 filament, which belongs to the field of chemical industry and includes melt polymerization, slice preparation, spinning, drawing and post-processing in sequence, heating caprolactam into a molten state, and melting the already Add lactam, initiator, stabilizer and graphene evenly into the polymerization tube; heat to control the temperature of the first polymerization zone at 130-150°C, the temperature of the second polymerization zone at 200-220°C, and the temperature of the third polymerization zone The temperature is 250-270°C, the temperature of the polymerization zone in the fourth section is controlled at 230-250°C, and the temperature of the polymerization zone in the fifth section is controlled at 210-230°C; stir evenly, and enter the slice preparation process after the polymerization is completed. The beneficial effects of the present invention are as follows: graphene powder is introduced in the melt polymerization stage, so that graphene and nylon 6 are fully mixed and contacted, and when nylon 6 is burned, the carbon ash produced by graphene combustion will cover nylon 6 melt droplets, preventing nylon 6 The formation of molten droplets, coated on the surface of nylon 6 fiber, also prevents further burning inside the fiber.

Description

Technical field [0001] The invention relates to the field of chemical engineering, in particular to a method for producing flame-retardant and drip-resistant nylon 6 filaments. Background technique [0002] Nylon 6 filament is a commonly used synthetic fiber, which is widely used in the home decoration market. It has the characteristics of good hand feeling, abrasion resistance and high color fastness, while the fully drawn yarn has the characteristics of soft hand feeling and good decorative effect. Generally, the filament yarn is produced by a two-step method, that is, the UDY yarn is produced in the first step, and the UDY yarn is cooled and drawn to produce a fully drawn yarn or DT yarn in the second step. This method has low efficiency, high cost and unstable product quality. [0003] In recent years, some companies have adopted the one-step method to produce nylon 6 fine denier filaments. The production process is: slice melting-extruder-spinneret-side blower cooling-nozzle ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of high impurity content, poor quality, high reject rate, and poor flame-retardant and anti-droplet effect of nylon 6 existing in the prior art, the present invention provides a production method of flame-retardant and anti-droplet nylon 6 filament method, the caprolactam is removed from the previous melt polymerization, and the temperature and stirring speed in the melting process are reasonably controlled, and graphene is added in the melt polymerization stage to reduce the low molecular weight content of the nylon melt obtained by polymerization to The lower level makes the nylon 6 slices obtained in the subsequent sequence have better quality and flame retardant and anti-droplet performance. The specific plan is as follows:

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