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Vistamaxx polymer blend for improve surface touch in nonwovens application

IP.com Disclosure Number: IPCOM000243871D
Publication Date: 2015-Oct-23
Document File: 4 page(s) / 111K

Publishing Venue

The IP.com Prior Art Database

Abstract

Vistamaxx performance polymers are widely used in spunmelt nonwoven processes for softness improvement The low crystallinity and elasticity of Vistamaxx makes it a potential material to deliver this performance at high dosage It is generally known to blend 5 30 wt of Vistamaxx 6202 with homopolymer polypropylene hPP and additives to achieve silky cottony softness of the resultant nonwoven However there is a new trend of wetness feel that require high dosage of Vistamaxx and the current solution of blending ultrahigh meltblown hPP MFR 1500g 10min with Vistamaxx 6202 MFR 18g 10min may lead to processing issues such as severe drips longer cooling time sticking to the machine adhesion to the conveyor and winding unwinding issues Due to these reasons this solution may not be suitable for producing low basis weight fabric 15 30gsm as required for this application On the other hand the high MFR of Vistamaxx 7050 MFR 48g 10min overcomes these issues and can be blended with standard spunbond hPP MFR 36g 10min with little change in MFR hence further simplifying processing This article describes the testing of formulations with 50 65 wt Vistamaxx 7050 blended with hPP to achieve tailored unique touch Coefficient of Friction CoF extensibility and basis weight

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Vistamaxx™ polymer blend for improve surface touch in nonwovens application

Abstract: Vistamaxx™ performance polymers are widely used in spunmelt nonwoven processes for softness improvement. The low crystallinity and elasticity of Vistamaxx makes it a potential material to deliver this performance at high dosage. It is generally known to blend 5-30 wt% of Vistamaxx 6202 with homopolymer polypropylene (hPP) and additives to achieve silky/cottony softness of the resultant nonwoven. However, there is a new trend of "wetness" feel that require high dosage of Vistamaxx, and the current solution of blending ultrahigh meltblown hPP (MFR 1500g/10min) with Vistamaxx 6202 (MFR 18g/10min) may lead to processing issues such as severe drips, longer cooling time, sticking to the machine, adhesion to the conveyor, and winding/unwinding issues. Due to these reasons, this solution may not be suitable for producing low basis weight fabric (15-30gsm), as required for this application. On the other hand, the high MFR of Vistamaxx 7050 (MFR 48g/10min) overcomes these issues and can be blended with standard spunbond hPP (MFR 36g/10min) with little change in MFR, hence further simplifying processing. This article describes the testing of formulations with 50-65 wt% Vistamaxx 7050 blended with hPP, to achieve tailored unique touch, Coefficient of Friction (CoF), extensibility and basis weight.

Background:
Softness of nonwoven fabric is one of the most important criteria in hygiene and medical applications, and VistamaxxTM 6202 lean blend solution is the leading solution in the Asia Pacific market. However, nonwoven convertors seek differentiated soft solutions with wetness, sticky hand feel, and high CoF with extensible properties at low to medium basis weight. The low crystallinity and elasticity of Vistamaxx polymers makes it a potential material to deliver these performances. However, this new trend requires high dosage of Vistamaxx. The current solution of blending ultrahigh meltblown hPP (MFR 1500g/10min) with Vistamaxx 6202 (MFR 18g/10min) may lead to processing issues such as severe drips, longer cooling time, sticking to the machine, adhesion to the conveyor, and winding/unwinding issues. Due to these reasons, this solution may not be suitable for producing low basis weight fabric (15-30gsm), as required for this application.

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