HIGH EFFICIENCY DUST SOCK

A dust sock filter medium laminate is provided which has at least two nonwoven w ebs of microfibers which have an average diameter (using a sample size of at least 10) between about 10 and 25 microns and which w ebs have been joined by a method comprising the steps of (a) directing the component lay...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	BROWN, JAMES PAGE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A dust sock filter medium laminate is provided which has at least two nonwoven w ebs of microfibers which have an average diameter (using a sample size of at least 10) between about 10 and 25 microns and which w ebs have been joined by a method comprising the steps of (a) directing the component layers to a separation zone, (b) applying water i n the amount of from about 5 % to 25 % based on the weight of the combined layers, (c) combining the component layers, (d) passing t he combination through a sonic bonder operating within the range of up to about 40,000 cps against a patterned anvil to produce a corre sponding pattern of thermal bond areas over about 3 % to 25 % of the surface area of the combination, and, (e) drying the sonically bonde d combination.