US 10,400,391 B2Granted

Process for the preparation of a non-woven microfibrous suede-like synthetic fabric

AssigneeAlcantaea S.P.A.

InventorsWalter Cardinali, Gianni Romani, Paolo Armadori, Giovanni Palomba, David Zoppitelli

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Abstract

The present invention refers to a process for the preparation of a non-woven microfibrous suede-like synthetic fabric that does not require the use of organic solvents and that makes it possible to obtain a finished product offering a good hand, excellent resistance to yellowing and high durability. It comprises needle-punching a felt of sea/island fibers, (a) impregnation with hot aqueous solution of PVOH having a degree of saponification of at least 94% or (b) impregnation with hot water followed by impregnation with cold PUR, removing the sea component, impregnating with PUR, coagulating the PUR, removing the PVOH, grinding the surface, dyeing and splitting in two sheets.

Claims20

Dependent claims

A process for the preparation of a microfibrous non-woven fabric, comprising the steps of:

a. preparing a felt via needle punching of a bicomponent fibre of the “island-in-the-sea” type,
b. hot impregnation of said felt with an aqueous solution of polyvinyl alcohol (PVA) having a degree of saponification of at least 94%, or hot impregnation of said felt with water and then cold impregnation with polyurethane (PU),
c. removal of the sea component from the intermediate product of step b,
d. impregnation of the microfibrous intermediate product with PU,
e. fixing the PU to the microfibrous intermediate product by means of coagulation and removing the PVA possibly added in step b,
f. submitting the material thus obtained to immersing on one or both sides, dyeing and splitting carried out in the order specified.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/437,313Filed 21 Oct 2013
Priority: IT MI2012A178022 Oct 2012
Published: US 2015/0275421 A11 Oct 2015
Granted: 3 Sep 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

D06N 3/0004
Characterised by the substrate: using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres
D06N 3/0011
Characterised by the substrate: using non-woven fabrics
D06N 3/004
Characterised by the substrate: using flocked webs or pile fabrics upon which a resin is applied; Teasing, raising web before resin application
D06N 3/14
With macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds , e.g. gelatine proteins:…