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VistamaxxTM Performance Polymer / Ultrahigh Melt Flow Rate Polypropylene (UHMFR PP) Blend for Elastic Spunbond Fabric with Enhanced Processability

IP.com Disclosure Number: IPCOM000239333D
Publication Date: 2014-Oct-30
Document File: 5 page(s) / 372K

Publishing Venue

The IP.com Prior Art Database

Abstract

An elastic nonwoven development using a unique blend of VistamaxxTM Performance Polymer with UHMFR PP is described. Studies have shown that fabrics made of a Vistamaxx Performance Polymer blend with UHMFR PP demonstrate good processability on a conventional spunbond machine. The fabrics made show good extensibility and elasticity.

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VistamaxxTM Performance Polymer / Ultrahigh Melt Flow Rate Polypropylene (UHMFR PP) Blend for Elastic Spunbond Fabric with Enhanced Processability

Abstract: An elastic nonwoven development using a unique blend of VistamaxxTM Performance Polymer with UHMFR PP is described. Studies have shown that fabrics made of a Vistamaxx Performance Polymer blend with UHMFR PP demonstrate good processability on a conventional spunbond machine. The fabrics made show good extensibility and elasticity.

Background

Stretchable nonwovens are desired in various applications including elastic hygiene, medical and packaging. Using elastomeric polymers, such as Thermoplastic Polyurethane (TPU) or Styrene- Ethylene/Butylene-Styrene (SEBS), has been a common approach to making such fabrics. Vistamaxx Performance Polymer is a polyolefin co-polymer synthesized using a metallocene catalyst and having advantages over other polymers used for such fabrics including economy and recyclability. The semi-crystalline structure of Vistamaxx Performance Polymer provides high amorphous content and adequate isotactic PP microcrystalline regions which enable good elasticity. Processability on conventional spunbond equipment is a challenge due to stickiness from the polymers' amorphous content. There is a need to develop a technology that can process the Vistamaxx Performance Polymer on a conventional spunbond machine and make nonwovens with desirable elastic and aesthetic properties.

Sample Preparation and Characterization

Sample blends were made using an online dry blending facility co-located with the spunbond machine. The formulations for the samples are provided in Table 1 below, with the amounts of each item being given in weight percent (wt%).

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