CS265162B1 - Abrasive bonded nonwoven fabric and method of making it - Google Patents

Abstract

Abrasive bonded nonwoven fabric consists by weight of 10 to 40% chemical fibers, 20 to 45% abrasive filler, 1 to 5% dispersant, 5 to 45% melamine formaldehyde or urea formaldehyde resin, 5 to 45% binder, 0.4 to 12% melamine or urea and 0.05 to 1.2% ammonium sulfate. A method of producing a bonded nonwoven abrasive fabric, in which a fleece is made, it is pre-reinforced by needling and then sprayed with a binder on both sides, then impregnated in a bath containing abrasive filler, dispersant, melamine formaldehyde or urea formaldehyde resin, acrylate or styrene acrylate binder, melamine or urea and ammonium sulfate, after which the entire structure is dried.

Description

BACKGROUND OF THE INVENTION The present invention relates to an abrasive bonded nonwoven fabric, in particular for cleaning, polishing and grinding dishes, aluminum, stainless steel and enamelled equipment in industry and households, and to a method for producing the same.

The use of powdered abrasive materials incorporated into a textile formation is well known. However, abrasive powder materials are applied to the fibrous or textile formation by spraying or dusting technology. For example, Hermes uses bone glue or synthetic resins to anchor the abrasive powder material onto a textile backing. Other manufacturers of abrasive nonwovens, such as Preudenberg, Lippert, Hilzinger-Thun or 3 M, also use synthetic resin to anchor abrasive powders, whether based on silicon carbide or alumina.

The known methods of applying abrasive material to a textile backing have a number of disadvantages. The most serious disadvantage is that the abrasive powder material applied to the textile backing by powdering or spraying technology is anchored only on the surface of the fibers or the surface of the fiber formation, respectively. When using the abrasive fabric so produced, the abrasive particles are easily and quickly crumbled, whereby the function of the abrasive fabric decreases and disappears.

It is an object of the present invention to overcome these drawbacks and to provide an abrasive bonded nonwoven with a high abrasive filler content in the form of a powder which is distributed uniformly throughout the fiber web, thereby substantially improving and particularly prolonging the abrasive ability of the bonded nonwoven. significant increase in service life.

The described disadvantages of known solutions of the abrasive nonwoven fabric and the method for its production are avoided by the abrasive bonded nonwoven fabric and the method for its production according to the invention.

The abrasive bonded nonwoven fabric according to the invention consists of 10 to 40% chemical fibers by weight, 20 to 45% abrasive filler in powder form with a particle size less than or equal to 80 µm, the abrasive filler being for example silicon carbide, synthetic corundum, polishing red, polishing green or Viennese lime, 1 to 5% dispersant, for example acrylic dips or acrylate polyelectrolyte, 5 to 45% melamine-formaldehyde or urea-formaldehyde resin, 5 to 45% acrylate or styrene-acrylate binder, 0.4 to 12% melamine or urea and 0.05 to 05% 1.2% ammonium sulfate.

Process for producing an abrasive bonded nonwoven fabric, wherein a nonwoven fabric is produced from a chemical fiber, which is subsequently pre-consolidated by needling, according to the invention, wherein the pre-consolidated nonwoven is reinforced by binder spraying, e.g. in the form of a particle size of less than or equal to 80 µm, for example silicon carbide, synthetic corundum, polishing red, polishing green or Viennese lime, a dispersing agent such as acrylic thickened or acrylate polyelectrolyte, and ammonium sulfate, whereupon the entire formation is dried.

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The basis weight of the abrasive bonded nonwoven fabric of the present invention is 200 to 1300 g.m.

An advantage of the abrasive bonded nonwoven fabric and the method of manufacture thereof according to the invention is the high abrasive filler content evenly distributed throughout the cross-section of the carrier fabric. This results in a longer service life than known solutions.

Example 1

The basis of the abrasive bonded nonwoven is a polyester fiber staple fleece having a fiber fineness of 11 dtex and 4.4 dtex and a fiber length of 38 to 120 mm in a ratio of 60/40 with a basis weight of 9

g.m. This web is made on a pneumatic sheet former, pre-consolidated by needling and reinforced by spraying an aqueous dispersion of an acrylate binder on both sides. The reinforced web 2 then has a basis weight of 80 gm. This is followed by impregnation of the web in a horizontal fulard in a bath containing a 32-40 µm silicon carbide powder, an acrylate binder, a melamine-formaldehyde resin, an acrylate polyelectrolyte, melamine, and ammonium sulfate. The Na2 impregnated fabric is dried. The resulting abrasive bonded nonwoven fabric comprises 39 g.m -2-2 acrylate binder, 19 g.m melamine formaldehyde resin, 4 g.m acrylate poles -2-2 in -2 electrolyte, 1 g.m melamine, 57 g.m silicon carbide and 0.1 b.m ammonium sulfate.

Example 2

The abrasive bonded nonwoven fabric consists of a polyester staple fiber web having a fiber fineness of 11 dtex and 4.4 dtex in a ratio of 60/40 with a fiber length of 38 to 120 mm and a basis weight of 48 g.m produced on a pneumatic web. The web is reinforced by spraying styrene acrylate binder on both sides. The reinforced fleece has a basis weight of 80 g.m. The nonwoven thus prepared is impregnated on a horizontal fulard and subsequently dried in a belt dryer.

The resulting abrasive bonded nonwoven fabric contains 74 grams of styrene acrylate binder,

-2 —2 —2

150 g.m of methoxyhexamethyl olmelamine, 12 g.m of acrylate thimble, 15 g.m of urea,

1.5 g.m. of ammonium sulfate, 2.5 g.m. of disperse dye and 165 g.m. of synthetic corundum having a particle size of 22 to 32 .mu.m. The total basis weight is 500 g.m.

Example 3

The abrasive bonded nonwoven consists of a fiber web of polyamide staple 2 having a fiber fineness of 17 dtex and a fiber length of 95 mm. A web of 96 g / m was produced on a carding machine and pre-consolidated by needling. It was further provided with a double-sided spray of styrene acrylate binder. The basis weight of the reinforced web is 160 g.m. The fleece is impregnated in horizontal fulard and further dried. The resulting abrasive bonded nonwoven fabric

-2-2 -2 contains 358 gm acrylic binder, 26.6 gm acrylic dips, 358 gm urea _in „2-2 formaldehyde resin, 3.6 gm ammonium sulfate and 358 gm silicon carbide having a particle size of 40-50 µm.

The total basis weight of the abrasive bonded nonwoven is 1300 g.m.

Claims (2)

Abrasive bonded nonwoven fabric, intended in particular for cleaning, polishing and grinding equipment of aluminum, tableware, stainless and enamelled articles in industry and households, characterized in that it consists of 10 to 40% by weight of chemical fibers, 20 to 45% by weight an abrasive filler in the form of a powder with a particle size of less than or equal to 80 µm, the abrasive filler being, for example, silicon carbide, synthetic corundum, polishing red, polishing green or Viennese lime, 1 to 5% dispersing agent such as acrylate dips or acrylate polyelectrolyte 45% melamine-formaldehyde or urea-formaldehyde resins, 5 to 45% acrylate or styrene acrylate binder, 0.4 to 12% melamine or urea and 0.05 to 1.2% ammonium sulfate. 2. A method for producing an abrasive bonded nonwoven fabric according to item 1, wherein a nonwoven fabric is made of chemical fibers by pre-firing, wherein the nonwoven fabric is subsequently reinforced by binder spraying, e.g. acrylic or styrene acrylate, then impregnated the nonwoven fabric. a bath comprising an abrasive filler in the form of a powder of less than or equal to 80 µm, for example silicon carbide, synthetic corundum, polishing red, polishing green or Viennese lime, a dispersing agent such as styrene acrylate binder, melamine or urea and ammonium sulfate, whereupon the entire structure is dried.