DE2540193A1 - Sheets from macerated tyres - produced by laminating with tyre, retreading waste and using binder in both layers - Google Patents

Abstract

Sheets from macerated rubber (esp. old tyres) and binder have one layer of the macerated tyre/binder and a layer of rubber waste plus binder bonded to it, the latter using rubber griding waste, etc. The sheets have smoother surface than older types (with(out) iron particles), can meet more demanding requirements, give better utilisation of waste tyres, and are suitable for e.G., flooring.

Description

"Consists of shredded rubber and binder

Plates and Method of Making Same "It's a method for the production of plates or the like.

from old metal parts consisting essentially of rubber Objects, especially old car tires, known in which the objects come together with the metal parts are shredded into small pieces of rubber and the shredded Mass mixed with a liquid binder and in plates or the like. is pressed.

The plates form a coarse-pored mass in which, if necessary the metal parts partially protrude from the rubber and therefore under certain circumstances to Injuries can give rise to.

The invention is based on the object of those made from rubber chips and binders - with or without iron parts - existing plates a less rough one To give surface and to make it suitable for more demanding purposes do. The invention accordingly consists essentially in the fact that the rubber chips and binders consisting of a layer (hereinafter referred to as? Gummischnitze1schichtll) with a layer of mixed with a binder combined with them to form a plate Rough meal, in particular from rubber abrasion (hereinafter referred to as "Rough meal layer" for short), is provided.

Such a plate allows old rubber tires or similar objects, especially those that contain iron parts or other metal parts, versatile and to use them economically and at the same time make a contribution to reduction to contribute to the pollution caused by old tires. In particular the abrasion that occurs when re-profiling old tires can also be used Waste in relatively large quantities as raw meal and a very suitable raw material for a smooth, fine-pored and elastic layer.

The panels produced according to the invention make it possible to use as floor panels an elastic, comfortable gait. Above all, they are suitable wherever either a certain porosity is desired, or where dry air conditions exist, especially for interiors such as basement floors, cellar bars, house passages, but also for parking spaces, to be laid under trees, under which they have one for the Trees form the required porous cover layer, or for similar Application areas. They can also be used as wall panels, especially with the outside visible layer of roughage, can be used. They insulate well against heat or Cold and have a sound-absorbing effect. Due to its porosity, the plate can optionally can also be used for filtering purposes.

The product according to the invention is not limited to the rest Plates in the narrower sense of the word, in which approximately parallel boundary surfaces are provided, but also includes more or less deviating accordingly layered items.

The invention also consists in a method of manufacture such plates in such a way that initially a mixture of raw meal and binder produced and then hardened to form a plate-like layer, whereupon the Shredded rubber compound mixed with binding agent applied to the layer of cream flour and pressed or welded together with this to form a layered unit (plate) will. As a rule, it is necessary here to add the binding agent for the raw meal as well as a catalyst serving as an accelerator for the chipped rubber to add.

To produce the raw meal layer, the Binder poured into one of the panels to be produced adapted form, then the catalyst is mixed in and the raw meal is stirred into the mixture produced. To save costs, it is often sufficient to use the relatively expensive catalyst, for example to be used in a ratio of 1:50 to the binder, but can accelerate the process the curing of the catalyst can also be used in larger quantities.

After stirring in the raw meal, the mixture is until hardened or left to stand almost until hardening, whereupon the e.g.

Muddy rubber schnitzel mass applied to the layer of roughage and then pressed by pressure with this to form a uniform overall plate.

A particularly economical production results when the raw meal mixture in the same receiving form in a layer of the raw meal to be used in each case Excessive amount is poured in and left to stand while foaming, until the mixture hardens from top to bottom one of the thickness of the finished Layer has formed corresponding jelly-like hardened layer. After completion this layer can be cut out of the mold, removed as a plate and inserted into the machine shape for pressing with the rubber chip layer to be applied to it be inserted. In order to prevent the raw meal mixture from caking in the receiving part To prevent machine shape, this is done with a Release agent, e.g. polyvinyl acrylic or the like.

lined. An extremely cumbersome sticking of plate material on the shape can thus be completely excluded.

The drawing shows a cross section through an inventive Plate. Here with 10 the rubber chip metal layer and with 11 the roughage layer designated. While the rubber chip layer rubber parts 12 mixed with iron parts 13 and binder 14, in a coarsely porous arrangement, consists of the roughage layer 11 made of finely divided raw meal 15, e.g. rubber abrasion, which is mixed in a suitable binding agent is embedded and has fine porosity. By pressing the plate by means of a Printing stamp in the direction of arrow P, the two layers, which are preferably the same Contain binders, compressed into a solid overall plate and this baked together or welded together, so to speak. The raw meal layer 11 has generally a smooth surface 16 that changes in shape during manufacture the layer itself forms or also subsequently produced by smoothing or can be perfected.

An NCO compound according to Art of isocyanate (e.g. Isapur or Desmodur). But another suitable one can also be used Binders are used.

The production of the plate is carried out in detail, expediently, as follows: a) The binder, especially an isocyanate of the formula R- (NCO) n, is poured into a mold adapted to the plate to be produced.

In the binder is used to accelerate the chemical processes a known catalyst is added, e.g. in a ratio of 1: 5 to 1:50 to Binder.

Then, in the mixture produced in this way, raw meal, in particular Rubber abrasion, stirred in.

After stirring in, the mixture is left to crystallize, whereby it foams up and thickens from the surface exposed to the air and hardened.

The surface dries out, whereby the hardening layer gradually increasing from top to bottom.

For example, after 10 to 20 minutes, the top layer, depending according to the desired thickness of e.g. 4 to 10 mm, from the lower still liquid Phase can be raised by attaching them to the walls, e.g. in a rectangular or in other desired shape is tapped and then lifted off, with a plate-like layer with smooth edges can be achieved. Such a sticking out and Can take off depending on the amount of raw meal and binding agent filled in several times, e.g. for three to six finished panels.

b) The machine shape used to produce such a finished panel is treated with a release agent, e.g. polyvinyl acrylic or a similar release agent, to prevent it a caking of the plate material on the mold lined.

The plate-like ones made previously from raw meal and binding agent The roughage layer is then turned upside down, i.e. with the smooth surface down, inserted into the machine mold.

The previously prepared mixture is then poured onto this layer of roughage Shredded rubber, e.g. from old shredded rubber tires, if necessary with the iron parts contained in the rubber tires mixed, a binder and a Catalyst, the binder suitably being the same as that of the raw meal was added (the same can also apply to the catalyst) to which Rough meal layer poured into the machine mold. The poured in is advantageous Mixture - expediently at least at certain intervals, e.g. of approx. 15 minutes - mechanically stirred so that no unwanted skin forms. When pouring the mass is smoothed the surface of the already filled mass, what can preferably be done by moving the pouring funnel back and forth.

c) The machine shape with the layers filled in on top of each other is now brought under the press, as far as it is not already in the press, and pressed together with a more or less high pressure, for example from 2 0.1 to 0.2 kgf / cm2. As a result, the two layers are firmly bonded, for example in the same way as welding together.

The machine mold is then opened and the practically hardened one Plate ejected from the mold.

In the production of the rubber chips and binders Mass or when this mass is poured onto the roughage layer, this mass can or the content of both layers in the machine form subjected to a vibration process will. Also, if necessary, if the rubber chips are admixtures of iron parts or contain other magnetizable iron parts, the mass guided by magnets so that the iron or other metal parts are in certain, desired Way can align in the rubber chip layer.

The plates can be of any size and shape getting produced. The production is advantageously carried out in standardized sizes, e.g. in panel sizes of 20/20, 40/40 or 40/60 cm. Toothed plates, as for parking spaces or the like. be used after the Process according to the invention, for example, are produced. The plate thickness can also be anything; Usually panels are of the total thickness from 2 to 5 cm preferred.

Usually the layer of raw meal is black in color. Indeed This layer or the rubber chip layer can be colored, e.g. in the form of color pastes of any color.

Claims (1)

Claims: Made of shredded rubber, especially old rubber tires panels consisting of and binding agent, characterized in that a layer (10) of shredded rubber (12) and binding agent (14) (rubber shredded layer) with a with it combined to form a plate layer (11) of mixed with binder (14) Rough meal (15), in particular made of rubber abrasion, (raw meal layer) is provided with the 2nd plate according to claim 1, characterized in that the fine-pored layer of raw meal (11) on its side opposite the coarse-pored rubber chip layer (10) has smooth surface (16). 5. Plate according to claim 1 or 2, characterized in that the Rubber chips (12) are mixed with metal parts (15). 4. A method for producing panels according to any one of the claims 1 to 5, characterized in that initially a mixture of raw meal and binding agent produced and then hardened to a plate-like layer, then the Shredded rubber compound mixed with binding agent as a rubber shredded layer on the raw meal layer applied and layered with this to form a Unit is pressed together or welded together. 5. The method according to claim 4, characterized in that the binder for the raw meal and for the chopped gum an accelerator Catalyst is added. 6. A method for producing a plate according to any one of the claims l to 3 or method according to claim 4 or 5, characterized in that for production the plate a layer of a mixture of raw meal and binding agent and a Layer made of a mixture of GummischnitzeSn- possibly mixed with iron parts - and binders, preferably of the same type as the aforementioned binder - under pressure to form a unit that firmly connects the two layers with one another Plate to be pressed. 7. The method according to claim 4, 5 or 6, characterized in that first of all, the binder is poured into a mold adapted to the plate to be produced, then the catalyst is added and the raw meal is added to the mixture produced is stirred in, whereupon the mixture produced in this way until it hardens or almost until left to harden before the binder was added Poured rubber chips onto the layer of raw meal and then pressurized is pressed with this to form a uniform plate. 8. A method for producing a plate according to any one of the claims 1 to 5 or method according to one of claims 4 to 7, characterized in that that the raw meal mixture in a form containing the same in an amount for a finished plate is poured in excess amount and so long with foaming is allowed to stand until one of the thicknesses desired for the finished plate Layer has formed corresponding hardened plate-shaped layer, then this Layer removed and in the machine shape for bonding with a mixed layer made of chipped rubber mixed with binder. 9. The method according to any one of claims 4 to 8, characterized in that that the hardened raw meal layer from the mold receiving the raw meal mixture is gouged out. 10. The method according to claim 8 or 9, characterized in that the hardened roughage layer after it has been removed from the layer used for its production Form turned upside down and placed in the upside down position in the machine mold will, whereupon the rubber escalope mass is poured onto the layer of roughage. 11. The method according to any one of claims 4 to 10, characterized in that that the machine mold receiving the layer of roughage is coated with a release agent, e.g. Polyvinyl acrylic or the like. To prevent the layer from sticking to the mold is lined. 12. The method according to any one of claims 4 to 11, characterized in that that the mixture of shredded rubber and binder before pouring - preferably mechanically and at intervals - is stirred. 13. The method according to claim 11 or 12, characterized in - Gemtsen net, that the rubber chip binder is smoothed out after pouring and before pressing will. 14. The method according to any one of claims 4 to 13, characterized in, that the mass consisting of rubber chips and binders and / or that of raw meal and binders existing mass before or after the joining of the two masses subjected to a shaking process. 15. The method according to any one of claims 4 to 14, wherein the rubber chips are mixed with metal parts, characterized in that the mixture for alignment the metal parts be guided by magnets. 16. The method according to any one of claims 4 to 15, characterized in that that after pressing the two layers together to form a single plate this is ejected from the mold.