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Method for forecasting diameter and lateral motion of melt-blown strand

A technology of lateral movement and prediction method, applied in melt spinning, special data processing applications, instruments, etc., can solve problems such as time-consuming, increased production costs, and inability to simulate the lateral movement of filaments

Inactive Publication Date: 2012-11-28
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent No. 200610117086.1 discloses a method for predicting the fiber diameter of polymer extrusion nonwoven fabrics, but this method can only predict the fiber diameter and cannot simulate the lateral movement of the filaments, so it is impossible to predict the direction of the structure and performance of the nonwoven fabric sex
This method will significantly increase the consumption of materials, manpower, and energy, greatly increase the production cost, and spend a lot of time

Method used

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  • Method for forecasting diameter and lateral motion of melt-blown strand
  • Method for forecasting diameter and lateral motion of melt-blown strand
  • Method for forecasting diameter and lateral motion of melt-blown strand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] The steps of the meltblown filament diameter and lateral motion prediction method include:

[0146] (1) Obtain relevant parameters of raw materials, equipment and processes.

[0147] Raw material parameters: The raw material is polypropylene, and its density and constant pressure specific heat are determined by the following formula:

[0148] ρ = 1 1.145 + 0.000903 · θ i C p = 0.3669 + 0.00242 · θ i ...

Embodiment 2

[0159] The steps of the meltblown filament diameter and lateral motion prediction method include:

[0160] (1) Obtain relevant parameters of raw materials, equipment and processes.

[0161] Raw material parameters: The raw material is polypropylene, and its density and specific heat at constant pressure are determined by formula (1). Its shear viscosity is determined by the following formula:

[0162] η = 3.15 × 10 - 4 exp ( 6021 θ i + 273 )

[0163] Equipment parameters: double-slot nozzles are used, and the relevant nozzle parameters are: the airflow angle is 60°, the width of the head end is 2.02mm, the width of the notch is 0.65mm, and the diameter of the spinneret hole is 0.4mm.

[...

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Abstract

The invention discloses a method for forecasting the diameter and the lateral motion of a melt-blown strand. The method comprises the following steps of: (1) acquiring raw material parameters, equipment parameters and process parameters; (2) calculating air flow speed distribution and air temperature distribution; and (3) calculating the diameter and the lateral motion displacement of the strand by using a melt-blown polymer spinning and stretching model. By the method, the diameter and the lateral motion displacement of the melt-blown strand can be forecast according to the performance of raw materials, the equipment parameters and the process parameters, so that the quality of a melt-blown non-woven fabric product is improved, and a melt-blown non-weaving process and melt-blown non-weaving equipment are optimized.

Description

technical field [0001] The invention belongs to the field of textiles, in particular to a method for predicting the diameter and lateral movement of melt blown filaments. Background technique [0002] Melt blown method is an important method of processing nonwovens. Melt-blown nonwovens have the advantages of fine fibers, fluffy structure, many pores and small pore size, etc., and the filtration efficiency can reach more than 99.9%. It can not only be used as general gas-solid and liquid-solid filter materials, but also widely used in metallurgy, Mining, chemical industry, medicine, machinery, electronics, food, nuclear industry, environmental protection, automobile and other fields can also be used as advanced filter materials for environmental purification and biological cleaning. [0003] The filament diameter is one of the most important quality indicators of meltblown nonwovens, and has received great attention from the nonwovens industry and related industries. After...

Claims

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Application Information

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IPC IPC(8): G06F17/50D01D5/08
Inventor 陈廷吴丽莉
Owner SUZHOU UNIV
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