Particle-loaded nonwoven fibrous article for separations and purifications
First Claim
1. A disk comprisinga) a thermoplastic nonwoven fibrous web, andb) sorptive or reactive particles enmeshed in said web to provide a particle-loaded fibrous disk,wherein said particle-loaded fibrous disk has been compressed or fused by at least one of calendering, heating, and applying pressure to provide said disk with controlled porosity and a Gurley number of at least two seconds, said disk being useful in solid phase extraction.
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Abstract
A particle loaded, porous, fibrous compressed or fused article comprises a nonwoven fibrous polymeric web, which preferably is thermoplastic, melt-extrudable, and pressure-fusible blown microfibrous web, and sorptive particles enmeshed in said web, the particle loaded fibrous article has a Gurley number of at least two seconds, and the article is useful in separation science. A method of preparation of the article and method of use is also disclosed.
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Citations
29 Claims
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1. A disk comprising
a) a thermoplastic nonwoven fibrous web, and b) sorptive or reactive particles enmeshed in said web to provide a particle-loaded fibrous disk, wherein said particle-loaded fibrous disk has been compressed or fused by at least one of calendering, heating, and applying pressure to provide said disk with controlled porosity and a Gurley number of at least two seconds, said disk being useful in solid phase extraction.
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24. A disk comprising
a) a thermoplastic nonwoven fibrous web, and b) sorptive or reactive particles enmeshed in said web to provide a particle-loaded fibrous disk, wherein said particle-loaded fibrous disk is in a compressed or fused state, said disk having controlled porosity and a Gurley number of at least two seconds, and said disk being useful in solid phase extraction.
Specification