Degradable hybrid fiber breathable felt as well as preparation method and drying method thereof

A technology of hybrid fiber and air felt, applied in the direction of liquid/gas/steam removal, vibration treatment, non-woven fabrics, etc. It can solve the problems of softening and deformation of synthetic fibers, waste plastics polluting the environment, and difficulty in recycling air felt to achieve excellent elasticity. , excellent air permeability, good biodegradability effect

Active Publication Date: 2021-06-18
宁波霓科新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of air felt product also has the problems of softening and deformation of synthetic fibers under high temperature and high pressure, and high product cost. At the same time, it is difficult to recycle the waste air felt after use, causing waste plastics to pollute the environment and other problems.

Method used

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  • Degradable hybrid fiber breathable felt as well as preparation method and drying method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 A method for preparing a degradable hybrid fiber air felt includes:

[0028] (1) Polylactic acid with a Mw of about 10,000 and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) with a Mw of about 200,000 are uniformly mixed at a mass ratio of 10:1 and melt-spun To obtain degradable polyester fibers, the melt spinning process includes: drying the mixture of the aforementioned two degradable polyesters at 80°C for 8 hours, and then melt-extruding them with a spinning screw, the temperature of which is about 220°C, The spinning speed is about 2600m / min, and then the temperature is rapidly cooled to room temperature at a cooling rate of about 50°C / s, and then pre-stretching, primary stretching, and secondary stretching are performed sequentially at a stretching temperature of around 120°C. The stretch ratios of the pre-stretching, primary stretching, and secondary stretching are respectively 1.1, 2.5, and 1.1, and the times of the pre-stretching, primary stretching, a...

Embodiment 2

[0042] Example 2 A method for preparing a degradable composite air felt includes:

[0043] (1) Mix poly(butylene succinate) with Mw of about 50,000 and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) with Mw of about 100,000 in a mass ratio of 5:1 Mixing and performing melt spinning processing to obtain degradable polyester fibers, the melt spinning process includes: drying the mixture of the aforementioned two degradable polyesters at 100°C for 6 hours, and then melt extruding with a spinning screw, spinning The screw temperature is about 250°C, the spinning speed is about 1600m / min, and then the temperature is rapidly lowered to room temperature at a cooling rate of about 60°C / s, and then pre-stretching and primary stretching are performed sequentially at a stretching temperature of about 100°C , secondary stretching, the stretch ratios of the pre-stretching, primary stretching, and secondary stretching are respectively 1.1, 2.2, and 1.05, and the times of the pre-stretching, ...

Embodiment 3

[0051] Example 3 A method for preparing a degradable composite air felt includes:

[0052] (1) Poly(butylene terephthalate adipate) with a Mw of about 100,000 and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) with a Mw of about 30,000 according to 10: The mass ratio of 3 is uniformly mixed and melt-spun to obtain degradable polyester fibers. The melt-spinning process includes: drying the mixture of the aforementioned two kinds of degradable polyesters at about 80°C for 8 hours, and then spinning with a spinning screw For melt extrusion, the temperature of the spinning screw is 250°C, the spinning speed is about 1500m / min, and then the temperature is rapidly cooled to room temperature at a cooling rate of about 55°C / s, and then pre-stretched sequentially at a stretching temperature of about 115°C Stretching, primary stretching, and secondary stretching, the stretch ratios of the pre-stretching, primary stretching, and secondary stretching are respectively 1.2, 2.8, and 1.15, an...

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Abstract

The invention discloses a degradable hybrid fiber breathable felt as well as a preparation method and drying method thereof. The preparation method comprises the following steps of uniformly mixing polylactic acid and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), and carrying out melt spinning processing to obtain degradable polyester fibers; and sequentially carrying out opening, carding, fiber web laying, needling and post-finishing treatment on natural plant fibers and the degradable polyester fibers to prepare the degradable hybrid fiber breathable felt. The degradable hybrid fiber breathable felt provided by the invention has relatively excellent biodegradability, air permeability, mechanical properties, high temperature and high pressure resistance and the like, and can be repeatedly used; the preparation process is simple and easy to implement and is compatible with an existing preparation process of a composite breathable felt; the degradable hybrid fiber breathable felt is green and cheap in raw materials, low in cost, free of waste gas and wastewater discharge, safe and environment-friendly, and meets the requirement of large-scale production; and in addition, the drying method is simple, the breathable felt is easy to regenerate, and the initial performance of the breathable felt is basically kept.

Description

technical field [0001] The invention relates to an air felt, in particular to a degradable hybrid fiber air felt and a preparation method thereof, belonging to the technical field of composite molding auxiliary materials. Background technique [0002] Composite autoclave molding technology has been widely used in the manufacture of high-performance advanced composite structural parts such as aerospace and new energy vehicles due to its special molding process. It can ensure that the moisture in the composite material curing process And the full discharge of small molecule gas. Composite materials manufactured by autoclave molding technology have the advantages of excellent mechanical properties, good heat resistance, uniform resin content, compact internal structure and excellent internal quality. Air felt is used as a channel to discharge small molecule gas during curing, and its air permeability under high temperature and high pressure conditions will seriously affect the...

Claims

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Application Information

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IPC IPC(8): D04H1/46D04H1/4382D04H1/435D04H1/425D06B15/00D06B13/00
CPCD04H1/425D04H1/435D04H1/4382D04H1/46D06B13/00D06B15/00
Inventor 益小苏孟润生汪泽湘
Owner 宁波霓科新材料有限公司
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