Method for preparing ultra-soft high-resilience wet ultra-fine denier polyamide leather

A manufacturing method, polyamide technology, applied in the direction of non-woven fabrics, stretch spinning, textiles and papermaking

Active Publication Date: 2012-06-27
WUXI DOUBLE ELEPHANT MICRO FIBER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microfiber polyurethane synthetic leather adopts bundled microfiber similar to natural leather, but the usual microfi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment one: a kind of manufacturing method of ultra-soft high-resilience wet-type ultra-fine denier polyamide leather comprises the following process steps:

[0022] (1) Preparation of superfine denier sea-island fibers: Polyamide 6 is used as the island component, and low-density polyethylene is used as the sea component. The polyamide 6 and low-density polyethylene are mixed and stirred evenly according to the mass ratio of 40:60, and the stirring speed is 30 rpm, stirring time is 15 minutes; through the single-screw spinning machine melted and stirred into the sea-island spinneret assembly, extruded through the distribution plate and spinneret to form filaments, the temperature of the first zone of the screw extruder is 90 °C, the temperature in the second zone is 180°C, the temperature in the third zone is 250°C, the temperature in the fourth zone is 280°C, the temperature in the fifth zone is 280°C, the temperature in the sixth zone is 285°C, the temperature in ...

Embodiment 2

[0027] Embodiment two: a kind of manufacturing method of ultra-soft high-resilience wet type ultra-fine denier polyamide leather comprises the following process steps:

[0028] (1) Preparation of superfine denier sea-island fibers: Polyamide 6 is used as the island component, and low-density polyethylene is used as the sea component. The polyamide 6 and low-density polyethylene are mixed and stirred evenly at a mass ratio of 60:40, and the stirring speed is 50 rpm, stirring time is 20 minutes; through the single-screw spinning machine melted and stirred into the sea-island spinneret assembly, extruded through the distribution plate and spinneret to form filaments, the temperature of the first zone of the screw extruder is 95 °C, the temperature in the second zone is 185°C, the temperature in the third zone is 255°C, the temperature in the fourth zone is 285°C, the temperature in the fifth zone is 285°C, the temperature in the sixth zone is 290°C, the temperature in the seventh ...

Embodiment 3

[0033] Embodiment three: a kind of manufacturing method of ultra-soft high-resilience wet type ultra-fine denier polyamide leather comprises the following process steps:

[0034] (1) Preparation of superfine denier sea-island fibers: Polyamide 6 is used as the island component, and low-density polyethylene is used as the sea component. Mix polyamide 6 and low-density polyethylene according to the mass ratio of 50:50 and stir evenly. The stirring speed is 40 rpm, stirring time is 16 minutes; through the single-screw spinning machine melted and stirred into the sea-island spinneret assembly, extruded through the distribution plate and spinneret to form filaments, the temperature of the first zone of the screw extruder is 90 °C, the temperature in the second zone is 190°C, the temperature in the third zone is 245°C, the temperature in the fourth zone is 275°C, the temperature in the fifth zone is 280°C, the temperature in the sixth zone is 285°C, the temperature in the seventh zon...

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Abstract

The invention relates to a method for preparing ultra-soft high-resilience wet ultra-fine denier polyamide leather. The method comprises the following steps of: (1) preparing ultra-fine denier sea island fibers; (2) preparing a non-woven fabric; (3) ensuring that the non-woven fabric passes through impregnation liquid, and solidifying and foaming in an aqueous solution of dimethylformamide, wherein solidification time is 40 to 60 minutes, solidification temperature is between 25 and 45 DEG C, and the concentration of the aqueous solution of the dimethylformamide is 18.5 to 24.5 mass percent; and washing to obtain a porous elastomer polyether polyurethane non-woven fabric wet substrate; (4) ensuring that the porous elastomer polyether polyurethane non-woven fabric wet substrate passes through a toluene tank to obtain a polyamide leather substrate; and (5) drying the polyamide leather substrate, impregnating into leather softening liquid, drying and tentering; and tanning the polyamide leather substrate by using a continuous tanning machine to obtain the ultra-fine denier polyamide leather. By the method, the current situation that the softness and resilience of imitated leather areinferior to those of genuine leather is avoided, and the special requirement of people on ultra-soft high-resilience ultra-fiber leather is met.

Description

technical field [0001] The invention relates to a method for manufacturing polyamide leather, in particular to a method for manufacturing ultra-soft high-resilience wet-type ultra-fine denier polyamide leather. Background technique [0002] At present, domestic microfiber polyurethane synthetic leather is mainly used in footwear, bags, sofas, car interiors, balls, gloves, etc. With the change of people's consumption concept, the requirements and expectations of natural leather are getting higher and higher compared with this kind of products. Microfiber polyurethane synthetic leather uses bundled microfibers similar to natural leather, but the usual superfine fiber polyester polyurethane synthetic leather still has a big gap with genuine leather in terms of feel and resilience. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a method for manufacturing ultra-soft and high-resilience wet-t...

Claims

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Application Information

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IPC IPC(8): D06N3/18D06C19/00D01D5/28D01D5/16D04H1/46D04H1/4334D06M15/568
Inventor 刘连伟尉雷刘安秦王华张鹏李兴振
Owner WUXI DOUBLE ELEPHANT MICRO FIBER MATERIAL
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