EDGING STRIP, IN PARTICULAR RAISED FLOOR EDGING STRIP

Abstract

The invention relates to an edging strip, in particular a raised floor edging strip, containing a thermoplastic material, a conductivity additive and a tribology additive. The invention also relates to a method for manufacturing the edging strip, a panel with an edging strip attached to it and the use of a tribology additive to reduce creaking.

Claims

1. An edging strip, in particular a raised floor edging strip, containing a thermoplastic material, a conductivity additive and a tribology additive, wherein the tribology additive is a plastic.

2. The edging strip according to claim 1, wherein the thermoplastic material is a thermoplastic.

3. The edging strip according to claim 1, wherein the conductivity additive is carbon-based or metal-based.

4. The edging strip according to claim 1, wherein the tribology additive polytetrafluoroethylene, polyoxymethylene, polyketone, polyethylene, in particular UHMW polyethylene, or a mixture thereof.

5. The edging strip according to claim 1, wherein the material of the edging strip has an electrical conductivity measured in the passage of 5*10.sup.10 up to 5*10.sup.6.

6. The edging strip according to claim 1, wherein the edging strip has a surface resistance of 10.sup.6 ohm or less.

7. The edging strip according to claim 1, wherein the edging strip has a contact resistance of 10.sup.6 ohm or less.

8. The edging strip according to claim 1, wherein the edging strip has a fire behavior of at least class E according to the DIN EN 13501 standard.

9. The edging strip according to claim 1, wherein the edging strip has a thickness of 0.2 to 5 mm, a width of 10 to 120 mm, or both.

10. The edging strip according to claim 1, wherein the edging strip comprises an adhesion promoter, a hot-melt adhesive, or both.

11. The edging strip according to claim 10, wherein the hot-melt adhesive is a hot-melt adhesive based on a polyamide, a polyethylene, an amorphous polyalphaolefin, a polyester elastomer, a thermoplastic polyurethane, a reactive polyurethane, an ethylene-vinyl acetate copolymer, or a copolyamide elastomer.

12. The edging strip according to claim 1, wherein a nonwoven material is laminated onto the edging strip.

13. A method for manufacturing an edging strip according to claim 1, comprising the steps of: a) providing a composition containing a thermoplastic material, a conductivity additive and a tribology additive, b) supplying mechanical energy, thermal energy, or both to the composition of step a) to obtain a molding compound, and c) forming the edging strip from the molding compound.

14. The method according to claim 13, wherein the method comprises an extrusion step.

15. (canceled)

16. A raised floor element comprising a panel and an edging strip attached thereto according to claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The invention is explained in more detail below by the exemplary drawings, which are in no way limiting. Like reference numerals refer to like elements. In the drawings:

[0063] FIG. 1 shows a side view of a raised floor, wherein the panels are edged with the edging strip according to the invention, and

[0064] FIG. 2 shows a plan view of a section of a raised floor, wherein the panels are edged with the edging strip according to the invention.

DETAILED DESCRIPTION

[0065] FIG. 1 shows a side view of part of a raised floor comprising raised floor elements 2. The raised floor element 2 comprises a particle board 3 which is chamfered at 4 and has an edging strip 1 according to the invention on all four narrow sides. The edging strip 1 has been attached to the particle board 3 with a hot-melt adhesive and has an adhesion promoter on the side facing the particle board to improve the adhesion of the hot-melt adhesive to the edging strip 1. The edging strip 1 is made of polypropylene and contains about 24 wt. % carbon black and about 20 wt. % polyketone.

[0066] The edged panels rest on a bearing panel 4, which in turn is connected to a head panel 7. The head panel 7 is connected to a support 5 which is attached to a base panel 6. As can be seen in FIG. 1, the edged panels are positioned such that a triangular gap is formed due to the chamfers on the panels, which closes towards the top. This arrangement of the panels is also used for the creaking test method.

[0067] FIG. 2 shows another view of the part of the raised floor comprising raised floor elements 2 from FIG. 1. The particle boards 3 edged with the edging strip 1 according to the invention rest on the bearing panel 4, which rests on the head panel 7, which is connected to the base panel 6 via the support 5.

Examples

[0068] Mixtures of a polypropylene compound (PP-Cpd) filled with 40% carbon black and pure polypropylene (PP) according to Table 1 were prepared. UHMW polyethylene (UHMW-PE) and polyketone (PK) were added to some of the edging strips.

TABLE-US-00001 TABLE 1 Mixtures of polypropylene compound and polypropylene (specified components in wt. %) No. 1.sup.a 2.sup.a 3 4 5 6 7 PP-Cpd 0 60 60 60 60 60 60 PP 100 40 35 25 35 25 20 UHMW-PE 0 0 5 15 0 0 0 PK 0 0 0 0 5 15 20 Explanations regarding Table 1: .sup.aComparative Example.

[0069] The mixtures were then fed into an extruder and edging strips 1 to 7 were extruded therefrom.

[0070] The surface resistance of the edging strips 1 to 7 obtained in this way was measured according to IEC 61340-4-1, edition 2016-4.

[0071] The edging strips 1 to 7 were then mounted to 41 mm thick particle boards, chamfered (4) on the face side, for raised floor elements using hot-melt adhesive. All edging strips adhered well to the panels.

[0072] The creaking behavior of said edged raised floor elements was then determined using the creaking test method described above, wherein two of the particle boards with edging strips 1 to 7 (edged on all four sides) were used as test specimens. The results are shown in Table 2.

TABLE-US-00002 TABLE 2 Surface resistance and creaking behavior of edging strips 1 to 7 No. 1.sup.a 2.sup.a 3 4 5 6 7 OW.sup.b >10.sup.3 10 13 16 11 13 14 KV.sup.c ++ 0 + 0 + ++ Explanations regarding Table 2: .sup.aComparative Example; .sup.bOW: Surface resistance in kiloohm; .sup.cKV: Creaking behavior ++: no audible creaking, +: quiet, only temporary creaking, 0: quiet creaking, loud creaking.

[0073] As can be seen in Table 2, it was possible to significantly reduce the surface resistance by using the carbon-black-filled polypropylene compound (cf. edging strip 1 compared to edging strips 2 to 7). Accordingly, electrical conductivity was also increased. However, it was also found that edging strip 2, which only contained the carbon-containing component carbon black, creaked. However, the creaking could be reduced by adding UHMW polyethylene or polyketone (cf. edging strip 2 compared to edging strips 3-7).