Cleaning cloth

Patent metadata

Field	Value
Publication number	US-10406565-B2
Application number	US-201515119132-A
Country	US
Kind code	B2
Filing date	Jan 15, 2015
Priority date	Feb 21, 2014
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

A cleaning cloth has a microfiber composite fleece material in which a first and a second fiber component are arranged in the form of alternating layers, wherein at least one first layer A has the first fiber component in the form of composite filaments which are melt-spun and deposited into a fleece and which are at least partially split into elementary filaments having an average titer of less than 0.1 dtex, preferably between 0.03 dtex and 0.06 dtex, and solidified, and wherein at least one layer B is arranged on the first layer A, wherein the layer B has the second fiber component in the form of fibers deposited into a fleece and solidified and having an average titer of 0.1 to 3 dtex, at least one second layer A is arranged on the layer B.

First claim

The invention claimed is:

1. A cleaning cloth, comprising:
a microfiber composite nonwoven comprising a first fibrous component and a second fibrous component, arranged as alternating plies,
wherein at least one first ply A comprises the first fibrous component as melt-spun composite filaments laid down to form a web, at least some of which have been split into elemental filaments having an average linear density of less than 0.1 dtex, and consolidated,
wherein at least one ply B is arranged on the first ply A, wherein the ply B comprises the second fibrous component as fibers having an average linear density of 0.1 to 3 dtex which have been laid down to form a web and consolidated,
wherein at least one second ply A is arranged on the ply B,
wherein the filaments of the first fibrous component are at least partially intertwined with the fibers of the second fibrous component due to the microfiber composite nonwoven receiving a treatment with high pressure water jets, a pressure of the high pressure water jets being of a level such that the cleaning cloth is free of holes after 450 industrial washing cycles according to DIN EN 155797, the treatment with high pressure water jets taking place at least once on each side of the at least one ply B.

2. The cloth of claim 1 , having a layered construction A(BA) n BA,
wherein n is in a range of from 1 to 20.

3. The cloth of claim 1 , wherein composite filaments of the first and/or second fibrous components have a cross section of orange-type or pie multisegmented structure.

4. The cloth of claim 1 , wherein fibers of the first fibrous component have a pie arrangement including 24, 32, 48, or 64 segments.

5. The cloth of claim 3 , wherein the composite filaments comprise different filaments comprising two or more incompatible thermoplastic polymers.

6. The cloth of claim 1 , wherein the second fibrous component comprises composite filaments including 2, 4, 8, 16 elemental filaments.

7. The cloth of claim 1 , wherein a ratio of the average filament linear density of the filaments of the second to the first fibrous component is a range of from 10 to 30.

8. The cloth of claim 1 , comprising the filaments of the first fibrous component in an amount of from 20-60 wt %, based on an overall weight of the nonwoven.

9. The cloth of claim 1 , comprising the filaments of the second fibrous component in an amount of from 40-80 wt %, based on an overall weight of the nonwoven.

10. The cloth of claim 1 , wherein the microfiber composite nonwoven includes a surface formed by the elemental filaments of the first fibrous component.

11. The cloth of claim 1 , having a ply sequence A(BA) n BA,
wherein n is in a range of from 1 to 15,
wherein the plies A comprise at least partially split pie 32 filaments,
wherein the plies B comprise at least partially split pie 8 filaments,
wherein a linear density of the elemental filaments of the pie 32 filaments is less than 0.1 dtex, and
wherein a linear density of the elemental filaments of the pie 8 filaments is 0.1 to 3 dtex.

12. The cloth of claim 1 , further comprising, between the plies A and B:
a further ply.

13. The cloth of claim 1 , having a symmetrical layered construction.

14. The cloth of claim 1 , wherein the elemental filaments of the first fibrous component have an average linear density in a range of from 0.03 to 0.06 dtex.

15. The cloth of claim 1 , wherein the second fibrous component comprises composite filaments consisting essentially of 2, 4, 8, 16 elemental filaments.

16. The cloth of claim 1 , wherein the second fibrous component comprises composite filaments consisting essentially of 8 elemental filaments.

17. The cloth of claim 1 , comprising the filaments of the second fibrous component in an amount of from 50 to 70 wt %, based on an overall weight of the nonwoven.

18. The cloth of claim 1 , further comprising, between the plies A and B:
a reinforcing ply.

19. A method of forming the cloth of claim 1 , the method comprising:
separately spinning two or more fiberplies A comprising filaments of the first fibrous component and one or more than one fiberply B comprising filaments of the second fibrous component, laid down to form a web and optionally, by needling for example, preconsolidated;
alternately arranging the fiberplies A and B arranged on top of each other, subject to the proviso that the outer plies are the fiberplies A; then
hydrofluidically treating the ply assembly to split the first and, optionally, also the second fibrous component, and to consolidate the plies A and B both within and between; and
finishing the ply assembly to form the cleaning cloth.

20. A method of cleaning, comprising:
contacting the cleaning cloth of claim 1 to a smooth surface.

Assignees

• Freudenberg Carl Kg

Inventors

• Groten Robert
• Eisenhut Andreas
• Dunkel Joerg
• Gleich Thorsten

Classifications

• D04H3/011

  Polyesters · CPC title

• D04H3/018

  characterised by the shape · CPC title

• D04H3/016

  characterised by the fineness · CPC title

• D04H1/498 Primary

  entanglement of layered webs · CPC title

• B08B1/006 Primary

  Operations & Transport · mapped topic