Elastic meltblown laminate constructions and methods for making same

A melt-blown layer and melt-blown technology are applied in the direction of lamination, lamination devices, chemical instruments and methods, etc., which can solve the problems of airtightness and expensive

Inactive Publication Date: 2012-11-21
EXXONMOBIL CHEM PAT INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these products are airtight, require adhesives a...

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  • Elastic meltblown laminate constructions and methods for making same
  • Elastic meltblown laminate constructions and methods for making same
  • Elastic meltblown laminate constructions and methods for making same

Examples

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Embodiment Construction

[0129] The above discussion can be further described with reference to the following non-limiting examples. In the examples provided, meltblown fabrics and polyoxymethylenes were formed using equipment and conditions similar to those of R. Zhao, "Meltblown Polyoxymethylene Copolymers", INT'L NONWOVENS J., pp. 19-24 (Summer 2005). layer structure. In particular, using Biax-Fiberfilm TM Meltblown fabrics and multilayer constructions are formed on a meltblown production line (Biax-Fiberfilm Corp., Greenville, WI) that operates at a melt pressure of 1200psi (6.89MPa) to 1700psi (10.34MPa) and a melt temperature of 200°C to 275°C. The temperature was operated using an array die with a spinneret hole density of 50-150 holes / inch. The line has an extruder, block and spinneret, and an air manifold to supply the spinneret with an air pressure of 5psi-20psi (34kPa-138kPa) and an air temperature of 220°C-260°C.

[0130] In each example, Biax-Fiberfilm was used under these conditions ...

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Abstract

Multilayer meltblown composites, articles made therefrom, and methods for making same are provided. The meltblown composite can include a first meltblown layer comprising one or more resins having an Ultimate Elongation (UE) of from about 50% to about 250%, as measured according to ASTM D412; and a second meltblown layer comprising a propylene-a-olefm copolymer having an ethylene content of about 5 wt% to about 20 wt%; a MFR (ASTM-1238D, 2.16 kg, 2300 DEG C) of about 10 g/10 min to about 30 g/10 min; and a heat of fusion of 75 J/g or less.

Description

[0001] Inventors: Alistair D. Westwood and Galen Richeson [0002] priority statement [0003] This application was filed concurrently with PCT / US2010 / ___(2010EM070). This application claims priority and the benefit of USSN 12 / 723,336 (2010EM071), filed March 12, 2010, and USSN 12 / 723,317 (2010EM070), filed March 12, 2010, each of which is incorporated herein in its entirety for reference. field of invention [0004] The present disclosure relates to elastic meltblown fibers comprising propylene-alpha-olefin copolymers, as well as elastic meltblown fabrics made therefrom, multilayer constructions made therefrom, and methods of making the same. Background of the invention [0005] The market desires highly elastic, breathable nonwoven fabrics that do not require a form of mechanical activation with the necessary aesthetic qualities. Existing products are complex laminates composed of elastic films (typically styrenic block copolymers (“SBC”) or polyurethane) with polystyre...

Claims

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Application Information

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IPC IPC(8): B32B27/02B32B27/08B29C48/05B29C48/90D04H1/4374D04H1/56D04H1/70D04H3/03D04H3/16
CPCB32B37/153D04H13/007A61F13/15731B32B2307/54B32B2262/0253B29C49/00C08L23/04C08L23/08D04H1/00B32B5/26B32B2307/51B32B3/28A61F2013/15967D04H1/70A61F2013/51452D01F6/30A61F13/51464A61F13/4902B32B27/08B32B2305/20A61F13/15593A61F13/627D04H3/16C08L23/10D06M10/008D04H1/565A61F13/51401C08L23/142D04H1/4374D04H13/002D04H3/03B32B27/32D01D5/0985D04H1/559D04H1/56B32B5/022B32B2255/02B32B2262/0207B32B2262/0215B32B2262/0223B32B2262/14B32B2270/00B32B2307/308B32B2307/536B32B2307/704B32B2307/718B32B2307/7242B32B2307/732B29C48/865B29C48/05B29C48/90C08L2666/02
Inventor A·D·韦斯特伍德G·C·里奇森
Owner EXXONMOBIL CHEM PAT INC
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