US 10,889,094 B2
Method for making a thin padding from stabilized fibers, for clothing articles, quilts and sleeping bags
Tranquilla Covini, Oggiono (IT)
Assigned to FISI FIBRE SINTETICHE S.P.A., Oggiono (IT)
Appl. No. 14/647,077
Filed by FISI FIBRE SINTETICHE S.P.A., Oggiono (IT)
PCT Filed Nov. 25, 2013, PCT No. PCT/IB2013/002632
§ 371(c)(1), (2) Date May 22, 2015,
PCT Pub. No. WO2014/080273, PCT Pub. Date May 30, 2014.
Claims priority of application No. MI2012A2000 (IT), filed on Nov. 26, 2012.
Prior Publication US 2015/0298445 A1, Oct. 22, 2015
Int. Cl. B32B 37/06 (2006.01); D04H 1/542 (2012.01); D04H 1/68 (2012.01); D04H 1/655 (2012.01); D04H 1/732 (2012.01); D04H 1/02 (2006.01)
CPC B32B 37/06 (2013.01) [D04H 1/02 (2013.01); D04H 1/542 (2013.01); D04H 1/655 (2013.01); D04H 1/68 (2013.01); D04H 1/732 (2013.01); B32B 2305/18 (2013.01); B32B 2310/00 (2013.01); B32B 2398/20 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for making a padding from stabilized synthetic fibers, for clothing articles, quilts and sleeping bags, said method comprising:
providing a synthetic fiber lap having opposed surfaces by mixing synthetic recycled fibers with thermobonding fibers, wherein all said synthetic recycled fibers and said thermobonding fibers are in a mutually mixed and random arrangement throughout said synthetic fiber lap;
conveying said synthetic fiber lap;
applying a liquid thermoplastic resin on only said opposed surfaces of said synthetic fiber lap simultaneously while said synthetic fiber lap is being conveyed, said liquid thermoplastic resin being a dispersion of a resin selected from vinyl, acryl, polyurethane, styrene and natural resins;
recovering excess thermoplastic resin of said liquid thermoplastic resin applied during said step of applying said liquid thermoplastic resin and recycling said excess thermoplastic resin and applying said excess thermoplastic resin in said step of applying said liquid thermoplastic resin to form a thermoplastic resin coated synthetic fiber lap;
conveying said thermoplastic resin coated synthetic fiber lap simultaneously during said step of conveying said synthetic fiber lap;
providing an oven adapted to heat said thermoplastic resin coated synthetic fiber lap by IR radiation;
arranging a pair of adjustable steel plates inside said oven;
heating said thermoplastic resin coated synthetic fiber lap simultaneously during said step of conveying said thermoplastic resin coated synthetic fiber lap by continuously conveying said thermoplastic resin coated synthetic fiber lap through said oven and simultaneously continuously conveying said thermoplastic resin coated synthetic fiber lap between said steel plates arranged inside said oven; and
reducing a thickness of said thermoplastic resin coated synthetic fiber lap and smoothing said opposed surfaces of said thermoplastic resin coated synthetic fiber lap while said thermoplastic resin coated synthetic fiber lap is being simultaneously continuously conveyed through said oven and between said steel plates and simultaneously heated by IR radiation to cross-link said thermoplastic resin in a drying step to provide a calendering effect on said thermoplastic resin coated synthetic fiber lap and thereby making said padding.