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US3692618A - Continuous filament nonwoven web
FORMATION OF A NONWOVEN WEB SUITABLE FOR THE PRODUCTION OF TEXTILE-LIKE OR PAPER-LIKE SHEET MATERIAL BY SIMULTANEOUSLY SPINNING A MULTIPLE NUMBER OF CONTINUOUS FILAMENTS OF A SYPTHETIC POLYMER SUCH AS POLYPROPLYLENE. GATHERING THE FILAMENTS INTO A STRAIGHT ROW OF SIDE-BY-SIDE, SUBSTANTIALLY EVENLY SPACED APART, UNTWISTED BUNDLES, EACH CONTAINING AT LEAST 15 FILAMENTS, SIMULTANEOUSLY DRAWING EACH BUNDLE DOWNWARDLY AT A VELOCITY OF AT LEAST 3,000 METERS PER MINUTE IN AN INDIVIDUAL SURROUNDING GAS COLUMN FLOWING AT SUPERSONIC VELOCITY, AS FOR EXAMPLE BY PASSING THE BUNDLES THROUGH A ROW OF AIR GUNS AND DIRECTING THE SAME TO IMPINGE ON A HORIZONTAL CARRIER BELT MOVING IN A DIRECTION SO THAT THE BUNDLES IN THEIR SURROUNDING GAS COLUMNS EXTEND IN A STRAIGHT ROW ACROSS THE CARRIER AT RIGHT ANGLES TO THE DIRECTION OF ITS MOVEMENT; CONTROLLING THE GAS COLUMN BY A CONTROL OF ITS DIVERGENT WIDTH AND/OR OSCILLATING THE SAME SO THAT THE LIMITS OF CONTACT OF THE EDGE OF EACH COLUMN WITH THE CARRIER OVERLAP THE LIMITS OF CONTACT OF THE EDGE OF THE ADJACENT COLUMN BY AT LEAST 50 PERCENT OF THE OVERALL WIDTH OF CONTACT OF AN INDIVIDUAL GAS COLUMN WITH THE CARRIER, AND MAINTAINING THE LAY-DOWN SPEED OF THE FILAMENTS IN RELATION TO THE SPEED OF THE CARRIER MOVEMENT SO THAT PRIOR TO AND/OR AS THE BUNDLES IMPINGE AGAINST THE CARRIER, THEY ARE DIVIDED INTO SUB-BUNDLES OF PARALLEL FILAMENTS WHICH DEPOSIT ON THE CARRIER IN A LOOP-LIKE ARRANGEMENT EXTENDING BACK AND FORTH ACROSS THE DIRECTION OF TRAVEL OF THE CARRIER WITHIN THE LIMITS OF THE GAS COLUMN SURROUNDING THE BUNDLE, FORMING A WEB WHICH IS CHARACTERIZED BY A MULTIPLE NUMBER OF SIDE-BY-SIDE LENGTHWISE SECTIONS, EACH SECTION BEING FORMED BY THE SUBBUNDLES OF PARALLEL FILAMENTS LYING IN A LOOP-LIKE ARRANGEMENT EXTENDING BACK AND FORTH ACROSS THE WIDTH OF THE SECTION AND CONTAINING MULTIPLE OVERLAPPING SECONDARY SMALLER LOOPS AND SWIRLS WITH THE ADJACENT INDIVIDUAL SECTIONS OVERLAPPING EACH OTHER WITHOUT STRATIFICATION AND WITH THE LOOPS, SECONDARY LOOPS AND SWIRLS OF ONE SECTION RANDOMLY SUBSTANTIALLY COMPETELY INTERMINGLED WITH THE OVERLAPPING PORTION OF THE ADJACENT SECTION. THE WEB AFTER ITS LAY-DOWN MAY BE INITIALLY STABILIZED BY HEAT-SEALING, NEEDING OR TREATING WITH A BINDER SUCH LATEX AND SUBJECTED TO FURTHER TREATMENTS CONVENTIONAL IN THE NONWOVEN ART.
FORMATION OF A NONWOVEN WEB SUITABLE FOR THE PRODUCTION OF TEXTILE-LIKE OR PAPER-LIKE SHEET MATERIAL BY SIMULTANEOUSLY SPINNING A MULTIPLE NUMBER OF CONTINUOUS FILAMENTS OF A SYPTHETIC POLYMER SUCH AS POLYPROPLYLENE. GATHERING THE FILAMENTS INTO A STRAIGHT ROW OF SIDE-BY-SIDE, SUBSTANTIALLY EVENLY SPACED APART, UNTWISTED BUNDLES, EACH CONTAINING AT LEAST 15 FILAMENTS, SIMULTANEOUSLY DRAWING EACH BUNDLE DOWNWARDLY AT A VELOCITY OF AT LEAST 3,000 METERS PER MINUTE IN AN INDIVIDUAL SURROUNDING GAS COLUMN FLOWING AT SUPERSONIC VELOCITY, AS FOR EXAMPLE BY PASSING THE BUNDLES THROUGH A ROW OF AIR GUNS AND DIRECTING THE SAME TO IMPINGE ON A HORIZONTAL CARRIER BELT MOVING IN A DIRECTION SO THAT THE BUNDLES IN THEIR SURROUNDING GAS COLUMNS EXTEND IN A STRAIGHT ROW ACROSS THE CARRIER AT RIGHT ANGLES TO THE DIRECTION OF ITS MOVEMENT; CONTROLLING THE GAS COLUMN BY A CONTROL OF ITS DIVERGENT WIDTH AND/OR OSCILLATING THE SAME SO THAT THE LIMITS OF CONTACT OF THE EDGE OF EACH COLUMN WITH THE CARRIER OVERLAP THE LIMITS OF CONTACT OF THE EDGE OF THE ADJACENT COLUMN BY AT LEAST 50 PERCENT OF THE OVERALL WIDTH OF CONTACT OF AN INDIVIDUAL GAS COLUMN WITH THE CARRIER, AND MAINTAINING THE LAY-DOWN SPEED OF THE FILAMENTS IN RELATION TO THE SPEED OF THE CARRIER MOVEMENT SO THAT PRIOR TO AND/OR AS THE BUNDLES IMPINGE AGAINST THE CARRIER, THEY ARE DIVIDED INTO SUB-BUNDLES OF PARALLEL FILAMENTS WHICH DEPOSIT ON THE CARRIER IN A LOOP-LIKE ARRANGEMENT EXTENDING BACK AND FORTH ACROSS THE DIRECTION OF TRAVEL OF THE CARRIER WITHIN THE LIMITS OF THE GAS COLUMN SURROUNDING THE BUNDLE, FORMING A WEB WHICH IS CHARACTERIZED BY A MULTIPLE NUMBER OF SIDE-BY-SIDE LENGTHWISE SECTIONS, EACH SECTION BEING FORMED BY THE SUBBUNDLES OF PARALLEL FILAMENTS LYING IN A LOOP-LIKE ARRANGEMENT EXTENDING BACK AND FORTH ACROSS THE WIDTH OF THE SECTION AND CONTAINING MULTIPLE OVERLAPPING SECONDARY SMALLER LOOPS AND SWIRLS WITH THE ADJACENT INDIVIDUAL SECTIONS OVERLAPPING EACH OTHER WITHOUT STRATIFICATION AND WITH THE LOOPS, SECONDARY LOOPS AND SWIRLS OF ONE SECTION RANDOMLY SUBSTANTIALLY COMPETELY INTERMINGLED WITH THE OVERLAPPING PORTION OF THE ADJACENT SECTION. THE WEB AFTER ITS LAY-DOWN MAY BE INITIALLY STABILIZED BY HEAT-SEALING, NEEDING OR TREATING WITH A BINDER SUCH LATEX AND SUBJECTED TO FURTHER TREATMENTS CONVENTIONAL IN THE NONWOVEN ART.
Issue #2
Need publish date
- Declined by admin
- Type of issue
- IV generated for non-target page
- Reported
- May 21, 2017