Spunbond nonwoven fabric

By using a composition of propylene-based polymers, viscosity-reducing cracking agents, and vitamin E in spunbond nonwoven fabrics, the shortcomings of spunbond nonwoven fabrics in terms of mechanical and barrier properties were overcome, resulting in higher crystallization temperature and mechanical strength, and improved spinning stability.

CN122349583APending Publication Date: 2026-07-07SABIC GLOBAL TECHNOLOGIES BV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SABIC GLOBAL TECHNOLOGIES BV
Filing Date
2024-12-10
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing spunbond nonwoven fabrics have shortcomings in terms of mechanical and barrier properties, making it difficult to meet certain application requirements.

Method used

A melt flow index ratio of at least 2.0 was prepared by melt mixing a composition comprising a propylene-based polymer, a viscosity-reducing cracking agent and vitamin E under viscosity-reducing cracking conditions, and then processed into a nonwoven fabric by spunbonding.

Benefits of technology

It achieves good mechanical and barrier properties of spunbond nonwoven fabrics, improves the stability of the spinning method, and enhances the crystallization temperature and mechanical strength of the fabric.

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Abstract

The present invention relates to a spunbond nonwoven fabric obtained by a) melt mixing a first composition comprising a propylene-based polymer, a vis-breaking agent and vitamin E under vis-breaking conditions to obtain a vis-broken second composition, and b) processing the vis-broken second composition by a spunbond process to obtain a nonwoven fabric, wherein the propylene-based polymer in the first composition has a melt flow index of MFI1 determined according to ISO 1133-1 :2011 at 230 °C and 2.16 kg, and the vis-broken second composition has a melt flow index of MFI2 determined according to ISO 1133-1 :2011 at 230 °C and 2.16 kg, and the ratio of MFI2 to MFI1 is at least 2.0.
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Citation Information

Patent Citations

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