CS272981B1 - Floor with reduced electric resistance - Google Patents

Abstract

The principle of the solution of floor with reduced electric resistance consisting of layers of particulate composite is the fact that at least one layer is a combined particulate fibrous composite, where the fibrous component consists of a non-woven fabric containing from 10 to 100 percent of electrically conductive fibres.

Description

Floor with reduced electrical resistance

The essence of the reduced electrical resistance floor formed by the particulate composite layers is that at least one layer is a combined particulate fiber composite, wherein the fiber component is comprised of a nonwoven fabric containing 10% to 100% electrically conductive fibers.

272 981 (11) (13) Bl (51) Int. Cl. ⁵

5/06

CS 272 981 Bl

The invention relates to a floor with a reduced electrical resistance, consisting of layers of particulate composite, wherein the properties of the co-interfacing layer of the fiber composite are selected so as to improve its mechanical-mechanical properties.

It is known that the unfavorable property of floors, which has a negative effect in the application sphere, is the formation and accumulation of electrostatic charge on the surface. In some cases, the formation of electrostatic charges on floors is a limiting factor in their use, typically in explosive environments or in installations with sophisticated instrumentation, where static electricity adversely affects their performance, even reducing their lifespan. U.S. Pat. Nos. 3,728,204 and 3,702,794 disclose floor coverings for special applications which are coated on the reverse side with aluminum foil and can be electrically grounded. CS Certificate No. X74 457 discloses a flooring which has regularly distributed copper or brass conductors in the floor layer. Known are bituminous flooring filled with carbon particles, mainly soot, reinforced with glass-textile. The disadvantage of the current state is the high demands on the preparation of floors with reduced electrical resistance. The use of aluminum foil has drawbacks in terms of durability of the effect - it is often oxidized due to air humidity. The use of conductive carbon black is limited by their high sorpon ability, which causes a sharp increase in viscosity, sometimes the black color of the floor is a defect in terms of interior design.

The use of regularly spaced copper or brass conductors is laborious in terms of flooring technology and is not always efficient enough to discharge the charge from the surface of a non-conductive material.

These and other disadvantages are solved by the present invention, wherein the reduced electrical resistance floor formed by the particulate composite layers comprises at least one composite particulate fiber composite gate, the fiber component of which is a nonwoven web containing 10% to 100% electrically conductive fibers.

The advantages of the floor according to the invention can be seen in the fact that the fiber composite ensures regulation of the reduction of the required electrically active filler in the other layers of the particulate composite, while providing the required electrical resistance of the flooring at lower filling.

Reducing the filler with electrically active fillers will make the formation of particulate composite undemanding from the technological point of view, while saving auxiliary ingredients. A better advantage is the improved thermal and acoustic insulation of the floor, in which, in addition to the aforementioned advantages, the fiber composite serves as a reinforcing material and an element for the electrical discharge of the formed charge.

Floor with reduced electrical resistance refers to cast floors, cassette type floors, squeegee floors and so on.

The invention is described but not limited to the following examples:

Example 1

Floor A with reduced electrical resistance consisting of:

epoxy resin 100 wt. parts Graphite with 99.9% carbon content 50 wt. parts a glycol based diluent 10 wt. parts network based network dietyléntiaroínu 9 wt. parts

reinforced needled nonwoven fabric containing 30% by weight fibers with a surface resistance of 20 ohm and 70% PoP fibers, having a basis weight of 300 g.m with an electrical surface and internal resistance of 1,220 ohm.

The floor resistance of the floor is 8. 10 ^ ohm.

A floor B with a reduced electrical resistance in composition corresponding to floor A, except that it does not contain a reinforced needle-woven nonwoven fabric.

The floor resistance is 2. 10 ⁷ ohm.

CS 272 981 Bl

Example 2

The floor as in Example 1A, with the difference that in the needled nonwoven fabric the content of electrically conductive fibers is 70% by weight. and its surface and internal resistance is 200 ohm. The floor resistance of the floor is 5. 10 ³ ohm.

Example 3

The floor as in case 2 with the difference that the topsheet is added and is formed epoxy resin 100 wt. parts heat treated ZnO 40 wt. parts a glycol-based diluent 5 wt. parts with a diethylenetriamine-based crosslinker 11 wt. parts

/ 6

Claims (4)

The ground resistance of the floor is 1. 10 ohm. Example 4 The floor as in Example 1, except that the needled nonwoven fabric comprises fibers with a surface resistance of 1. 10 ³ ohm. * 8 The ground resistance of the floor is 5. 10 ohm. In the examples, electrical resistances are measured according to CSN 341 382. A similar effect can be obtained when using polyester, polyamide, and taper-based fibers instead of POP staple fibers to form the needled nonwoven fabric. OBJECT OF THE INVENTION A floor with a reduced electrical resistance consisting of layers of particulate composite, characterized in that at least one layer is a combined particulate fiber composite, the fibrous component of which is a nonwoven fabric of 50 g basis weight. m to 800 g. m having a content by weight of 10% to 100% of electrically conductive fibers with electrical resistance, -2.4. 10 to 10 ohm.