Polyolefin based nonwoven fabrics comprising calcium carbonate, and preparation method therefor

Abstract

The present invention relates to polyolefin based nonwoven fabrics comprising calcium carbonate, and a preparation method therefor. The preparation method, of the present invention, for the polyolefin based nonwoven fabrics comprising calcium carbonate corresponds to a method for preparing nonwoven fabrics by spinning and drawing a complex melt consisting of a polyolefin based resin and calcium carbonate, wherein the calcium carbonate, corresponding to a precipitated calcium carbonate, is produced by: eluting calcium ions by injecting an additive for calcium ion elution into a lime based by-product solution and, after elution, injecting a precipitating agent so as to sink the lime based by-product and thus separate an eluate from the by-product; thereafter, improving the reaction rate of the eluate and carbon dioxide by insufflating carbon dioxide in the course of transferring the eluate to a reaction tank; and maintaining, at all times, the concentration of calcium ions in the eluate at an appropriate level by adjusting the eluate, prepared in an elution tank, to have a pH of 12 or higher, and wherein the nonwoven fabrics is prepared by the steps of: forming a masterbatch consisting of the precipitated calcium carbonate and a polyolefin based synthetic resin; forming a fiber material composition by mixing a polypropylene fiber material with the masterbatch; forming a web by melt-spinning the fiber material composition; and thermally pressing the web. The polyolefin based nonwoven fabrics comprising calcium carbonate and the preparation method therefor, of the present invention, configured as above, use calcium carbonate for enhancing whiteness, and are highly environment-friendly by using and reacting, during the preparation process of the calcium carbonate being used, carbon dioxide generated in a steel mill, etc. In addition, since the prepared precipitated calcium carbonate has excellent spinning properties, a certain amount or more of polypropylene can be replaced with the calcium carbonate, and thus, production costs can be reduced.

Description

technical field [0001] The present invention relates to a polyolefin-based nonwoven fabric containing calcium carbonate and a method for producing the same. Pure hard calcium carbonate, a method for producing polyolefin-based nonwoven fabrics, and particularly relates to a method for properly utilizing pure hard calcium carbonate so that nonwoven fabrics with excellent whiteness can be produced inexpensively, which can be effectively used for diapers, Calcium carbonate-containing polyolefin-based nonwoven fabric for sanitary products such as sanitary napkins and a method for producing the same. Background technique [0002] In general, nonwoven fabrics are widely used as industrial materials in various fields such as hygiene materials, daily necessities, agriculture, and filters, and the demand for them is increasing. Among them, spunbond non-woven fabric refers to the non-woven fabric produced in the process of spinning chemical fibers, which is made by blowing the fibers ...

AI Technical Summary

Problems solved by technology

However, including the disclosed invention, conventional non-woven fabrics containing calcium carbonate for improving whiteness have a disadvantage in that their manufacturing costs increase due to productivity and the like. In terms of material usage, there are some limitations from a practical point of view

[0004] Further, in the case where a large amount of thermoplastic polymer resin is consumed every year for the production of nonwoven fabric products, the production cost of nonwoven fabrics has been further increased due to the recent increase in resin prices, so that the problem is accentuated

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