ITR2012, Orlando, FL February 20-22, 2012 http://www.prolone.com/logo_earth_friendly_600x600.jpg http://thumbs.dreamstime.com/thumb_170/1185844728SVw3Es.jpg Meltblown Ingo Nano-fibers: Current Status and Future Potential Gajanan Bhat and Kokouvi Akato, The University of Tennessee, Knoxville TN
31
Embed
Meltblown Ingo Nano-fibers: Current Status and Future .../.../presentations/fibers/04_Meltblown... · Meltblown Ingo Nano-fibers: Current Status and Future Potential . ... -Melt spinning,
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
• Disposable Nonwovens • MSW • Recycling is Hard • Composting
-Biodegradability • Biodegradable Nonwovens
Poly(lactic acid) (PLA) Nonwovens - solution to sustainability
•PLA is obtained from renewable resources
•Biodegradable in nature
•Greener products
-compared to polypropylene etc.
PLA vs. other Biopolymers
•PLA is a thermoplastic polymer
•Easily processable
-Melt spinning, melt blowing etc.
•Economic advantage of melt processing
•Absence of chemicals during conversion processes
•Hence processing is comparatively eco-friendly
PLA polymer characterization - DSC thermo gram
* Heat of fusion of 100% crystalline PLA is taken as 93.7 j/gm
(Reference: B. Gupta et al, Journal of applied polymer science 2006, v100, n2, p1239-1246)
Peak melting temperature: 173°C
% DSC crystallinity: 47.2%*
Schematic of the melt blowing process
Melt Blowing Research At UTNRL Six-Inch line (HT Capable)
8
Nano and Sub-Micron Fibers
•Diameter
•High specific surface area
•Flexibility
•Enhanced reactivity of the Catalysts and
Biocides
9
Production Techniques for Nano and Sub-Micron Fibers
• Splitting
• Electrospinning
• Meltblowing??
10
Production Techniques for Nano and Sub-Micron Fibers
• Splitting of bi-/multi-component fibers – From multicomponent
spinning and dissolution of some components, one can produce fibers somewhat close to that of nanofibers
– Hard to control the fiber dimensions and solvent removal & recovery issues
11
Electrospinning
• Based on the current state of the art, nanofibers have a bright future and a large market potential, but only if – Cost of electrospun nanofibers – Extremely low production rate
• The commercial reality for electrospinning is still distant
New approach - Modified melt blowing process
12
Technology for Nano and Sub-Micron Fibers by Meltblowing
• Modular Dies on six inch line – AGR/NTI – Hills – AGR Die on twenty inch line
• Nanofiber production at commercially feasible rates – Throughput rates from 100-1100 gm/hour
13
Nanofiber Melt Blowing
• Nanofiber Die Module • Allows Trials With Small
Amounts of Material (Less Than 1 kg/trial)
• Capable of Reaching Polymer Melt Temps Above 750 Deg F.
• Capable of Air Temps In Excess of 750 Deg F
PLA and PP Submicron Fibers Samples ID Conditions Basis