HU202147B - Antistaic floor of pvc base and method for producing same - Google Patents

Abstract

Plasticised PVC based antistatic multi-layered floorings contains 2-6 pts. wt. (based on PVC) of antistatic additives in its upper (1) and intermediate layers (3), conducting cpds. in to lowest base layer. Antistatic additives comprise ammonium cpds. of polyethers, fatty acid esters and of quaternary cpds. The top layer opt. contains fungi- and bactericides. It may be patterned by embossing. The intermediate layer immediately below the top layer is opt. colour printed. Reinforced layer contains pref. PVC impregnated glass scrim or non-woven glass fabric and antistatic agents as in other layers or conducting carbon-black or graphite at 6-25 pts. wt. level. The base layer (5) contains 6-25 pts. wt. carbon black or graphite (based in this case on PVC and admixed PVC waste as 100%). - (Dwg.0/1)

Description

The scope of the description is: 5 pages, Figure 1 impregnated reinforcement material, preferably impregnated glass grid or nonwoven glass fiber, and 2-6 parts by weight of the above antistatic, or 6-15 parts by weight of the above antistatic, or 6-15 parts by weight of conductive material per PVC. it contains carbon black or graphite and has a bottom conductive core (5) containing 100 parts by weight of a conductive carbon black and / or graphite, optionally in the amount of 6 to 25 parts by weight of mixed PVC.

The invention also relates to a method of producing the above floor.

B 202 147 B

-1UU 202147Β

FIELD OF THE INVENTION The present invention relates to a new type of PVC-based reinforced multilayer antistatic floor having a conductivity of 10 to ¹⁰ Ohm. The work consists of a variety of different, antistatic and conductive layers, including reinforcing material, fungus and mold resistant as required, suitable for covering computer rooms, instrument rooms, sanitary facilities. The invention also relates to a method for producing this.

Soviet Patent Specifications A1106862 and 1106814 disclose PVC floors having a cross-section of combinations of antistatic compounds. Their disadvantage is that a large amount of antistatic agent is required for the preparation, and therefore the product is expensive and, on the other hand, its antistatic effect is relatively weak: their conductivity is 10 ¹⁰ Ohm.

No. 61-201085. Japanese Patent Publication No. 6,197,196 discloses an anti-static PVC-based material comprising a base layer comprising stainless steel fibers and a base layer comprising conductive carbon black. The disadvantage of this solution is that special abrasion-resistant plastics processing machines are required for manufacturing due to the strong abrasion effect of stainless steel fibers.

The object of the present invention is to overcome the drawbacks of the known antistatic PVC floors by producing a product having layers of different properties having only antistatic agents in the upper layers and a conductive carbon black and / or graphite in the base layer. The base layer of the work may optionally be waste and the appropriate layer combinations provide a guaranteed 10 -10 ⁹ Ohm discharge resistance.

Our aim was also to develop an appropriate, continuous and cost-effective production technology that allows us to produce antistatic PVC floors with a conductive resistance of 10 'and a conventional PVC processing machine (internal mixer, roller, calander, laminator) and mainly slurry PVC. 10 to ⁹ Ohm.

The invention is based on the discovery that the required minimum concentration of antistatic in the upper layers of the multilayer PVC floor is conductive soot and / or graphite in the base layer, and that if the floor reinforcing material is impregnated with an antistatic or carbon black and / or graphite paste, it has excellent antistatic effect. product. Such flooring can be colored as desired, because the antistatic layers can be pigmented and printed and only the back of the floor will be black or black.

Optionally, the top layer may also have mold and fungus qualities, thus meeting the requirements of the sanitary facilities.

The concentration of antistatic agents and conductive materials in each layer should be appropriately selected and a reinforcing material that allows for continuous stretch laminating should be used to make the process productive and produce a dimensional end product. In addition, it is important to have a coordinated selection of the stall state and the mode of incorporation of the antistatic, e.g. in the case of a waxy antistatic, the preparation of the masterbatch, the direct addition of liquid antistatic is the preferred solution. The use of paste and / or graphite is an important catch on the one hand with the pre-moistening of the plasticizer, then homogenization on the PVC powder mixture and finally the foil pulling on the calender because this is the only way that the carbon black and / or graphite does not lose its conductivity during processing. A further novel feature of the process is the preparation of a reinforcing paste with carbon black and / or graphite for impregnation of a reinforcing material, using a low plasticizer PVC powder and a viscosity reducing agent. The proper construction of the reinforcing material used also contributes to the success of the process.

The product according to the invention is therefore an antistatic, soft PVC-based, reinforced, multi-layered floor comprising an antistatic agent (s) in its top layer or layers, and its lower layer by the addition of a conductive additive, characterized in that its covering and intermediate layers are 100 parts by weight of PVC as an antistatic. containing 2-6 parts by weight of a polyether, fatty acid ester or quaternary ammonium salt type material, optionally a bacterial and / or antifungal agent in the top layer of the relief layer, optionally an anti-static layer reinforced with a reinforced layer of soft PVC. impregnated reinforcing material, preferably impregnated glass grate or non-woven glass fiber, or from 2 to 6 parts by weight of said antistatic per 100 parts by weight of PVC;

It contains from 6 to 25 parts by weight of conductive carbon black or graphite, the lowest conductive base layer containing from about 6 to 25 parts by weight of conductive carbon black and / or graphite, optionally mixed with waste mixed PVC.

The present invention also relates to a method for producing the above-mentioned multilayer PVC-based floor in such a manner that

the. ), a mixture of PVC powder, plasticizer, stabilizer, lubricant and optionally additional known excipient is added directly to the weight of 100 parts by weight of PVC to 2-6 parts by weight of a polyether, fatty acid ester or quaternary ammonium salt type antistatic agent, or in master batch and then calendered. pulling plates, and optionally applying color pressure,

b. ), a mixture of PVC powder, plasticizer, stabilizer, lubricant and, optionally, other known excipients is explored in an internal mixer, and then a mixture of the two.

c. ) wetted conductive carbon black or graphite with 100 parts by weight of soot or graphite with 720 parts by weight of plasticizer in a mixer at 20-100 rpm, and

d. in step b), the material obtained in step c) corresponding to the amount of carbon black or graphite in the internal mixer is added to the internal mixer, and the mixture thus obtained is treated on a homogenizing roller and is known per se. way to film, then

e. ), 100 parts by weight of a PVC powder having a plasticizer up to 40%, a 70-100 parts by weight of 2-H2O 202147Β, a viscosity-reducing additive of 2-6 parts by weight, 2-6 parts by weight of the above type of antistatic agent or 7-30 parts by weight of step c). by adding wetted carbon black or graphite, and optionally adding other excipients, thereby advantageously forming a glass grid consisting of fibers of 0.10-0.15 mm thick, 5 cm 10-18 or 20-50 g / m ^{2 of} 814 microns thick fibers. glass fiber fabric is impregnated and the resulting reinforced layer is laminated with one or more layers of the films obtained in steps a) and d) in a manner known per se.

An embodiment of the product according to the invention is illustrated in FIG. 1, wherein 1 is the transparent topsheet, 2 is the color printed middle layer, 3 is the intermediate layer, 4 is the reinforcing material, and 5 is the base layer.

The following examples illustrate steps d) and e) of the process of the present invention without limiting our claims to the examples.

Example 1

the. Preparation of an antistatic masterbatch calculated per 100 tr of PVC 33-43 Tebestat IK12, alkyl-substituted (non-ionogenic) polyether, or Tebestat 5811 (fatty acid ester) antistatic masterbatch was prepared by rapid stirring at 120 ° C with stirring.

b. Production of antistatic plate

Starting from the following recipe, the suspension PVC, K.-70 100 tr antistatic, a. Step 15 Masterbatch 15tr dioctyl phthalate (DOP) softener 34 tr barium-cadmium complex stabilizer 3 tr stearin (glidant) 0.5 tr mixture was prepared on a fast stirrer, the mixture was explored on an extruder or an internal mixer and then homogenized in a homogenizing roller. we add it to a calender machine with a transparent 0.5 mm thick plate.

Example 2

Starting from the following recipe, the suspension PVC K = 64 100 tr antistatic, l.a. example masterpiece 15 tr plasticizer: DOP 40 tr

Barium-cadmium-zinc stabilizer 1 tr slurry: stearin 0.5 tr chalk 50 tr pigment 3 tr fast stirring mixture, the mixture is extruded on an extruder or an internal mixer, and the resulting unaltered material is added to a calender machine through a homogenizing roller. A 0.2 mm thick sheet is drawn and one side of the plate is printed by a color printing process.

Example 3

Starting from the following recipe

suspension PVC K = 64 100 tr antistatic, 1. a. example masterbatch 15 tr softener: DOP 40 tr stabilizer, Ca-stearate 1.5 tr chalk 100 tr

a blender is blended, the mixture is extruded on an extruder or an internal mixer, and the resulting unaltered material is added to a calender machine through a homogenizing roller, where a 0.5 mm thick plate is drawn.

Example 4

Starting from the following recipe, the suspension PVC, K = 64 100 tr plasticizer: DOP 39 tr stabilizer: CA stearate 2 tr mixture is prepared on a fast mixer 120-130 'Con to form a dry mixture and add this warm mixture to an internal mixer where approx. Plasticize for 2 minutes.

CHEZA Carb-EC powder or granules with a specific surface area of 980 m ² / g are moistened with a 100 µm carbon black with a 7 tr softener at a speed of 20-100 rpm by spraying the plasticizer into the mixing chamber with constant air pressure. A dry mixture of 100 parts of PVC from wetted soot has already softened. KB. after one minute of mixing, the carbon black is incorporated into the PVC blend without any damage. Then, the exposed PVC mixture is homogenized on a rolling mill. homogenize for one minute, then added to a calender machine with a 0.5 mm thick conductive plate.

Example 5

We prepare PVC paste with the following composition: Emulsion PVC (Hostalit P 4472 or Solvic 367

NC 30% Softener Recording) 70 tr

MicroscopePVC (Ongrovil S160,

15-16% Softener) 30 tr

Didecyl phthalate softener 30 tr

Eviplast 610 or 79 Softener 50 tr

Viscosity Reducer: Mironol 401 4 tr

Barium Cadmium Zinc Stearate Stabilizer 3 tr

Wet soot 10 tr

The paste obtained is passed through a homogenizer, a glass grid consisting of 0.10-0.15 mm thick fibers and 10-18 fibers per cm is impregnated, and the excess paste is pushed out of the material between two cylinders and the paste remaining on the grid is 160-170 'C- is pre-gelatinized for 2 minutes and finally laminated to the conductive plate of Example 4 during heat treatment and pressure.

Then, in the top-down order, 1.b. example, the printed plate of Example 2 (above the color pressure), and the \ t

Example 4 and finally Example 5

-3HU 202147 Β mesh (laminated with mesh) is laminated on a laminating machine by heat treatment and pressure, then the laminate is cooled.

Example 6

1-5. except that instead of an antistatic masterbatch, 3 parts by weight of liquid Tebestat VP 5980 is applied to the antistatic layers.

Example 7

1-5. or Example 6 with the exception that 100 parts by weight of graphite having a particle size of not more than 15 microns is wetted with a plasticizer in a slow mixer and 25 parts by weight of 100 parts by weight of PVC in the conductive substrate and the impregnating paste are added.

Example 8

Example 4, 6 or 7 is followed, except that soft PVC waste is used instead of a PVC blend for conducting the conductive plate.

Example 9

Examples 5, 6, 7, or 8 are followed except that instead of carbon black or graphite moistened with the impregnated paste, 3 parts by weight of liquid Tebestat VP 5980 is added per 100 parts by weight of PVC.

Example 10

5-9. except that instead of glass grid 20-50 g / m ^{z of} nonwoven glass fiber having a specific weight of 8 to 14 microns is used as reinforcing material.

Example 11

1 to 10 except that all 5 layers are laminated in one step.

Example 12

We proceed according to any one of Examples 1-11, except that the transparent surface of the laminate is rendered relief and then cooled.

Example 13

1 or 5-12. except that the transparent soft PVC blend is calculated from 0.2 to 0.5 tr of Preventol per 100 tr of PVC.

The advantage of the product according to the invention is that by combining the antistatic and conductive layers, a new PVC floor can be produced with a 10-10 ⁹ Ohm discharge resistance. The use of a waste-containing base layer is also a material-saving solution.

The product is dimensionally stable due to the use of reinforcing material, its surface may be smooth or embossed and color-colored to suit different aesthetic needs. The use of bacteria and fungicides in the top layer can be facilitated by the need to be able to use in health rooms. Can be used well for metal flooring and grounding with copper strips for laying concrete floors (computer rooms, tool boxes). Combining anti-static welding cord with plinth skirting, complete casing systems can be made in antistatic design.

An advantage of the method according to the invention is that it can be carried out on conventional plastic processing machines, the raw material is essentially a cheap suspension of PVC and partially soft PVC waste. A particular advantage of conducting the conductive base layer is that the conductive filler material retains its conductivity at various stages of the process because it does not break, its particles in contact with each other in the layer. The conductive or antistatic PVC paste used to drink the reinforcing material retains its low viscosity for a long time.

Claims (2)

PATENT CLAIMS An antistatic, soft PVC-based, reinforced, multilayer flooring comprising antistatic agent (s) in its upper layer or layers and a lower layer containing a conductive additive, characterized in that its topcoat (1) and intermediate (3) layers are antistatic. containing 26 parts by weight of polyether or fatty acid ester or quaternary ammonium salt based on PVC, optionally containing in its upper layer a bacterial and / or fungicidal agent, if desired, with an anti-static layer, optionally colored, soft PVC-impregnated reinforcing material, preferably impregnated glass mesh or nonwoven fiberglass fabric, and 2-6 parts by weight of the above antistatic agent or 6-25 parts by weight of conductive carbon or graphite based on 100 parts by weight of PVC, and the lowest conductive base Food (5) contains from 100 parts by weight, optionally from 6 to 25 parts by weight of conductive carbon black and / or graphite, based on PVC mixed with waste. A method for producing a multilayer PVC-based floor according to claim 1, characterized in that: the. Step 2) 2-6 parts of a polyether, fatty acid ester or quaternary ammonium salt antistatic agent are added to a mixture of PVC powder, plasticizer, stabilizer, glidant and other known excipients, either directly or as a master blend, followed by calendering of the blend. and then optionally color-print them, then b. step), the mixture of PVC powder, plasticizer, stabilizer, glidant and optionally other known excipients is decomposed in an internal mixer, c. ), the conductive carbon black or graphite is wetted with 100 parts by weight of carbon black or graphite with 720 parts by weight of a plasticizer at 20-100 rpm, and d. ), 100 parts by weight, b. To the softened blend obtained in step (a) is added the amount of carbon black or graphite obtained in step (c) corresponding to 6-25 parts by weight of carbon black or graphite, and the resulting blend is treated on a homogenizing roll and calendered in a known manner. e.) 100 parts by weight of PVC powder having a softening capacity of up to 40%, 70-100 parts by weight of plasticizer, 2-6 parts by weight of a viscosity reducing additive, An antistatic agent of 2-6 parts by weight, or 7-30 parts by weight of wetted carbon black or graphite prepared in step c) and optionally other auxiliary substances is prepared by the addition of 10 to 18 fibers per 5 cm of fiber, preferably 0.10-0.15 mm. glass grid containing, or 20 to 50 g / m ^z nonwoven glass fiber basis weight consisting of a thickness of 85 14 microns fiber fabric impregnated and films thus obtained reinforced layer obtained in step a.) and d.) laminating one or more layers of a known manner .