Superfine elastic non-woven fabric and preparation method thereof

A non-woven fabric and elastic technology, applied in the field of ultra-fine elastic non-woven fabric and its preparation, can solve the problems of discontinuous fiber, poor fiber performance, low production efficiency, etc., to avoid uneven fiber diameter and overcome viscosity Effect of surface tension and fine fiber diameter

Active Publication Date: 2019-11-19
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional centrifugal spinning equipment usually uses ring collecting rods to collect fibers. The fibers obtained by this collection method are discontinuous short fibers, and the production efficiency is low, which limits the application of centrifugal spinning in large-scale production, and the prepared fibers have poor properties. good
[0004] The patent application with the application number CN201210448865.5 discloses a method for preparing polyurethane elastic fiber with low temperature setting. The method uses polyether diol PTMG, polyester diol PE, diphenylmethane diisocyanate MDI, tetramethyl Xylylene diisocyanate m-TMXDI carries out polycondensation reaction, obtains urethane prep

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Superfine elastic non-woven fabric and preparation method thereof
  • Superfine elastic non-woven fabric and preparation method thereof
  • Superfine elastic non-woven fabric and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0052] Example 1:

[0053] A method for preparing ultra-fine elastic non-woven fabric based on a plane receiving type centrifugal spinning device, comprising the following steps:

[0054] S1. Preparation of spinning solution: Dissolve the polyurethane particles in N,N-dimethylformamide, stir evenly, and prepare a spinning solution by vacuum defoaming; wherein, the polyurethane particles are mixed with N,N-dimethylformamide. The mass fraction ratio of amide is 20%:80%, the stirring temperature is 20~45℃, the stirring rate is 520r / min, the stirring time is 2h, and the vacuum defoaming treatment time is 30min;

[0055] S2, centrifugal spinning: the spinning solution prepared in step S1 is injected into the plane receiving centrifugal spinning device 100 for centrifugal spinning to obtain ultra-fine elastic non-woven fabrics; wherein, the centrifugal spinning parameters are as follows: the spinning The spinneret diameter of the device is 0.16mm (the needle specification used is 3...

Example Embodiment

[0057] Example 2-7

[0058] Examples 2-7 provide methods for preparing ultra-fine elastic non-woven fabrics based on a plane receiving centrifugal spinning device. Compared with Example 1, the difference lies in that the polyurethane particles and N,N-dimethylformaldehyde are changed. The mass fraction ratio of amide, the other steps are basically the same as in Example 1, and will not be repeated here; The mass fraction ratio of polyurethane and N,N-dimethylformamide in Example 2-7 is shown in the following table:

[0059] project Mass fraction ratio of polyurethane to N,N-dimethylformamide Example 2 21％:79％ Example 3 22％:78％ Example 4 23％:77％ Example 5 30％:70％ Example 6 40％:60％ Example 7 50％:50％

[0060] Table 1 shows the properties of the ultra-fine elastic nonwoven fabrics prepared in Examples 1-7

[0061]

[0062] From Table 1 and Figure 5 to Figure 11 It can be seen that when the mass fraction ratio of polyurethan...

Example Embodiment

[0064] Examples 8-14

[0065] Examples 8-14 provide methods for preparing ultra-fine elastic non-woven fabrics based on a plane receiving centrifugal spinning device. Compared with Example 2, the difference lies in that the collecting device 14 and the spinning device are changed. The spinning distance between 133 and the other steps are basically the same as those of Example 2, and will not be repeated here; Show:

[0066] Table 2 shows the spinning distance of Examples 2 and 8-14 and the mechanical properties of the prepared ultra-fine elastic non-woven fabrics

[0067]

[0068] As can be seen from Table 2, as the spinning distance increases, the fiber diameter gradually decreases because the fibers can be stretched more effectively in the same time. When the spinning distance is 5 cm (Example 9), the preparation The diameter of the ultra-fine elastic non-woven fabric is 2.7±1.2μm, the tensile strength can reach 18.59±5.77Mpa, and the elongation at break can reach 454±2...

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Abstract

The invention provides superfine elastic non-woven fabric prepared based on a plane-receiving centrifugal spinning device and a preparation method thereof.The preparation method is characterized in that polyurethane particles are dissolved in N,N-dimethylformamide to prepare a spinning solution, and then the spinning solution is injected into the plane-receiving centrifugal spinning device to perform centrifugal spinning.By reasonably setting the spinning parameters of centrifugal spinning, the spinning process is guaranteed to be smoothly carried out; the fiber diameter of the prepared superfine elastic non-woven fabric can reach 2.1+/-1.1 mum; the arrangement is dense; the tensile strength can reach 18.59+/-5.59 MPa; the elongation at break can reach 450+/-20%; the method provided by theinvention is simple in operation process, suitable for large-scale mass production, and high in production efficiency.

Description

technical field [0001] The invention relates to the field of non-woven fabrics, in particular to an ultrafine elastic non-woven fabric prepared based on a plane-receiving centrifugal spinning device and a preparation method thereof. Background technique [0002] The full name of polyurethane is polyurethane. It is a high molecular polymer containing more carbamate groups or urea groups in the main chain. It is formed by the addition polymerization of organic diisocyanate or polyisocyanate and dihydroxy or polyhydroxy. Polyurethane is a polymer material composed of hard segment phase and soft segment phase, and its performance mainly depends on the phase structure and microphase separation degree of soft and hard segments. Due to its large cohesive energy, the hydrogen bonds formed between molecules make it gather together to form a hard segment; while the less polar polyether segment or polyester segment gather together to form a soft segment. Section area; because polyuret...

Claims

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Application Information

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IPC IPC(8): D04H3/009D04H3/016D01D5/18D01F6/70D01F6/78
CPCD01D5/18D01F6/70D01F6/78D04H3/009D04H3/016
Inventor 刘欣李晨张科徐卫林
Owner WUHAN TEXTILE UNIV
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