DE102014010036A1 - Process for producing a rubber material - Google Patents

Abstract

A process for the production of a rubber material in which, according to a recipe, a cohesive rubber (4; 10) and solid and / or liquid further ingredients (9; 28; 29) are brought together for mutual mixing. Prior to assembly in an extruder, at least one further ingredient (9) of the formulation is applied to the rubber (4; 10) and the cohesion of the rubber (4; 10) is reduced.

Description

The invention relates to a process for the production of a rubber material in which, according to a recipe, a cohesive rubber and solid and / or liquid further ingredients for mutual mixing are preferably combined in at least one extruder. Furthermore, the invention relates to the use of a recipe-related ingredient for the production of a rubber material for the purpose of reducing the cohesion of the rubber. Furthermore, it relates to a precursor obtained in this way.

The preparation of rubber compounds is often still by batchwise, d. H. batch or bundle-working internal mixer with downstream rolling mills executed, although these units usually have to be traversed two or more times for quality or temperature reasons.

In contrast, has a continuous process using extruders, in particular multi-shaft extruder a considerable advantage in terms of investment and operating costs and the energy and space requirements. This is especially true when using annularly arranged multi-shaft extruders, which are referred to below as ring extruder, and which are described by the applicant, for example in their patents / patent applications US 5,836,682 and US 2007/0121421.

Furthermore, continuous processes offer a pronounced consistency of product quality, which is much more difficult to achieve in intermittent batch processes. They are also much easier to automate with regard to material handling and process control and regulation. The possibility of adapting the screw and housing configurations to the procedural requirements of different formulations leads to a pronounced flexibility of the extrusion plants.

There is generally the problem of metering the rubber in the continuous rubber preparation. The rubber is usually supplied in bales or webs or strips. Often also margins are available for recycling.

After WO 2012/164424 An attempt is made to solve the problem by controlling the cutting speed at which the rubber is cut.

After another solution is started with a suspension in which the rubber is distributed as fine particles; This solution is for example in the US 2008/0310251 described.

With these aforementioned technical approaches, however, the basic problem can not be solved that in continuous mixing processes reliable metering of the raw materials is of crucial importance. In the case of multi-shaft extruders, the residence time distribution is relatively narrow, so that metering fluctuations can hardly be compensated for by axial backmixing. Moreover, the disadvantages of the often required reduction in the cutting speed with which the rubber is cut are evident. The finally achieved throughput is not directly determined gravimetrically but via indirect measurands and can thus only be regulated inaccurately. Furthermore, the provision and handling of the suspension, in which the rubber is distributed as fine particles, are associated with high costs. In addition, many types of rubber are difficult to crush and begin to re-bond soon after granulation.

From the DE 10 2009 003 199 B3 Therefore, an apparatus for coating a material with a powder is known. Here, a material that moves over a runway, continuously and uniformly coated from above with a powdery substance as Fremdbeimengung.

In addition, the material is continuously and uniformly coated by a second application component from below with the powdery substance.

In this procedure, only the web is coated on top and bottom; However, this corresponds to only a small portion of the surface, which is formed when the web is ground into metered particles, and thus can not prevent sticking of the ground product.

The powder applied from above onto the material first passes through a sieve for cleaning purposes, in order then to be applied to the material.

However, the powder which is applied to the material comprises at least one foreign substance, which in particular contaminates the material in the sequence and not least has a negative effect on the properties of the mixture. In addition, it is difficult to quantify the exact proportion of release agent and therefore to take into account in the recipe in an appropriate manner.

The invention is therefore based on the object to provide a method for producing in particular a rubber material in which The cohesion of the rubber can be reduced without polluting impurities can get into the rubber material.

Furthermore, the manufacturing process should not be interrupted or slowed down and it should be possible to have a precise direct regulation of the throughput.

The object is achieved in that according to claim 1, a method for producing a rubber material is provided, are brought together according to a recipe, a cohesive rubber and solid and / or liquid other ingredients for mutual mixing in at least one extruder, wherein before the Feeding at least one further ingredient is applied to the rubber and the cohesion of the rubber is reduced. Further advantageous embodiments are disclosed in the subclaims.

The term rubber material is understood to mean a material, in particular from the group of elastomers with viscoelastic properties. The rubber material may be based on rubber and / or other rubber-like vegetable juices which, upon drying, preferably harden to plastic-elastic solids through polymerization.

Natural rubber as well as synthetically produced rubber may also be used to practice the present invention.

The rubber material comprises a vulcanized rubber and is known in particular as an elastic and relatively hard-wearing solid.

• – Fußbodenbeläge,
• – Gummiplatten und -bahnen,
• – technische Gummiprofile, Faltenbälge, Dichtungen, Schläuche, Gummidämpfer, Flachriemen, Keilriemen, Transportbänder
• – Reifen,
• – Dehnungsfugenbänder und Bauelemente im Brücken- und Hochbau,
• – Kabelummantelungen,
• – Schuhsohlen
• – kautschukbasierte Klebestoffe,
• – Kaumasse sowie Kaugummi.

Typical application examples include:

• - floor coverings,
• - rubber sheets and tracks,
• - technical rubber profiles, bellows, gaskets, hoses, rubber dampers, flat belts, V-belts, conveyor belts
• - Tires,
• - Expansion joints and construction elements in bridge and building construction,
• - cable sheathing,
• - Shoe soles
• - rubber-based adhesives,
• - Chewy and chewing gum.

Synthetic rubbers are z. Styrene rubber, styrene-butadiene rubber, butadiene rubber, acrylonitrile-butadiene rubber, butyl rubber, ethylene-propylene-diene rubber, chloroprene rubber and polyisoprene rubber. The list is only exemplary and in no way exclusively meant.

In the production of the rubber material, the natural and / or the synthetic rubber further solid and / or liquid ingredients are supplied and mixed with this / n. In the present case, mixing is also understood to mean mixing.

Such rubber mixtures or rubber mixtures all have a complex formulation with in the simplest case seven to eight components, for special requirements up to 20 components, each tailored to the application.

In the context of the present invention, ingredients are by way of example and by no means exclusively rubber, solvents, plasticizers, vulcanization accelerator curing systems, cure retarders, activators, silica, carbon black, pigments, fillers, resins, adhesives, antishrink additives, ozone and anti-aging agents.

However, they are all characterized in that they are recipe-related, that is to say inherent, components for the production of a rubber material and are distinguished from external additives, such as the separate release agents or coating, wetting or dusting agents known in the prior art.

A release agent in the sense of this foreign admixture according to the prior art has the purpose of separating the particles. In contrast to this, for example, a plasticizer is not regarded as a foreign admixture in the sense of the prior art, but as an ingredient, because it influences the Shore hardness and thus is a necessary formulation constituent of the material.

The selection of ingredients depends u. a. from the application of the material and thus also from the product requirements as well as from the costs. These parameters have a not inconsiderable influence on the choice of the rubber and the reinforcement system.

For tire mixes z. As "silica" an important recipe ingredient. Car tires, for example, benefit from the reinforcement of a special SiO ₂ system, because they can save fuel compared with traditional rubber compounds that are traditionally filled with soot and at the same time improve the safety performance.

• – Calziumcarbonat für Fußbodenbeläge, Dichtungsplatten,
• – Aluminiumsilikat für Schläuche, Schuhsohlen, Profile, Dichtungen, technische Produkte, Fußbodenbeläge
• – Kieselerde für Schläuche, Dichtungen, technische Produkte
• – Calciumsilikat für Schuhsohlen, Dichtungsplatten,
• – Magnesiumsilikat für technische Produkte,
• – Zinkcarbonat für helle Produkte,
• – Kaolin calziniert für Kabel, technische Produkte,
• – silanisierte Kaoline für technische Produkte
• – silanisierte Silikate für Reifen,
• – Magnesiumsilikat zur Beeinflussung der Gasdurchlässigkeit und Chemikalienbeständigkeit,
• – Aluminiumhydroxid zur Beeinflussung des Flanschschutzes,
• – Magnesiumcarbonat zur Beeinflussung der Grünfestigkeit,
• – Bariumsulfat zum Einsatz bei Lärmdämmung, Strahlenschutz, zur Beeinflussung der Säurebeständigkeit,
• – Calziumoxid zur Verwendung als Wasser- und Säureakzeptor
• – Titandioxid zur Verwendung als UV-Stabilisator,
• – Aluminiumoxid zur Verwendung als inerter Füllstoff,
• – Zinkoxid zur Verwendung als Vernetzungsmittel und zur Beeinflussung der Hitzebeständigkeit,
• – Magnesiumoxid zur Verwendung als Aktivator und zur Beeinflussung der Hitzebeständigkeit. Ein geringes bis mittelwirkendes Verstärkungssystem weisen dabei beispielhaft auf: Aluminiumsilikat, Kieselerde, Calziumcarbonat, Magnesiumcarbonat, Calciumsilikat, Magnesiumsilikat, calcioniertes Kaolin, silanisierte Kaoline. Ein mittel bis hohes Verstärkungssystem weisen beispielhaft auf: Aluminiumsilikat, silanisierte Silicate. Ein Beispiel für die flüssigen Inhaltsstoffe sind die vorerwähnten Weichmacher. Diese sind vorzugsweise naphtenische oder aromatische Mineralöle.

By way of example and not exhaustively, the following fillers are characterized as ingredients. The following list is also in As regards the ingredients, as for the intended use, by way of example and not by way of limitation:

• - Calcium carbonate for floor coverings, sealing plates,
• - Aluminum silicate for hoses, shoe soles, profiles, seals, technical products, floor coverings
• - Silica for hoses, gaskets, technical products
• - Calcium silicate for shoe soles, gaskets,
• - magnesium silicate for technical products,
• - zinc carbonate for light products,
• - kaolin calcined for cables, technical products,
• - silanized kaolins for technical products
• Silanized silicates for tires,
• - magnesium silicate for influencing the gas permeability and chemical resistance,
• - aluminum hydroxide to influence the flange protection,
• Magnesium carbonate for influencing the green strength,
• - Barium sulfate for use in noise insulation, radiation protection, to influence the acid resistance,
• - Calcium oxide for use as a water and acid acceptor
• Titanium dioxide for use as a UV stabilizer,
• Alumina for use as an inert filler,
• Zinc oxide for use as a crosslinking agent and for influencing heat resistance,
• - Magnesium oxide for use as an activator and for influencing the heat resistance. An example of a low to medium-strength reinforcing system is aluminum silicate, silica, calcium carbonate, magnesium carbonate, calcium silicate, magnesium silicate, calcined kaolin, silanized kaolins. A medium to high amplification system exemplify: aluminum silicate, silanized silicates. An example of the liquid ingredients are the aforementioned plasticizers. These are preferably naphthenic or aromatic mineral oils.

Natural and / or synthetic rubber is in particular freshly prepared or slightly sticky when wet, and tends to stick to itself and / or additives.

The tack of the natural and / or synthetic rubber is due to the adhesiveness, in particular of the large surfaces of the molecules of the rubber. There are also large cohesive forces.

The rubber is often fed to the processing in webs or bales. For better processing, the individual webs or bales are additionally also cut, torn or cut in any other way into pieces of different sizes. This results in rubber sections, as they are understood in the broadest sense.

Due to the cohesive forces of the rubber sections of different sizes, the pieces easily stick together again, which has a negative effect on the further process process. This is also referred to below - no matter which form the "rewrapping" assumes - lumping.

Cohesion refers to the binding forces between atoms within a substance.

The adhesion force is the physical state of an interface layer which forms between two condensed phases which come into contact with one another (eg solid and liquid).

In this context, the adhesion comprises the adhesive forces at the contact surfaces of two different or the same substances due to molecular forces. The substances may be in solid or liquid state.

In order to prevent a subsequent sticking of the individual, separate rubber sections, the invention provides that at least one ingredient of the formulation for the production of the rubber material is applied to the rubber, in particular that brought the rubber before merging with the other ingredients in contact , in particular pollinated or wetted. An application to the rubber can be carried out in any desired form, so be in addition to the above and below reproduced examples, an injection, shaking or Einsieben.

In order to prevent contamination of the rubber material by the pollination, at least one or more ingredients are used for the pollination and / or wetting of the rubber, the / the regular part of the recipe or the materials to be processed of the rubber material is / are.

A contamination of the rubber material by additives that are not part of the recipe or the materials to be processed, is avoided by the fact that the pollination or wetting of the rubber is carried out with at least one of the ingredients of the recipe of the rubber material.

For reasons of simplification, only one or more ingredients will be referred to below which are applied to the rubber in order to reduce the cohesion.

In the recipe all necessary for the preparation of the rubber material components such. As the rubber and the required ingredients listed.

The invention therefore proves to be extremely advantageous, since the rubber, preferably in its embodiment as rubber parts preferably before merging with the other ingredients contained in the recipe for partial or complete reduction of the rubber cohesion with one or more of the ingredients mentioned in the recipe in contact brought, in particular pollinated or wetted. The ingredients are thus applied - in a broader sense - on the rubber.

The rubber sections can thus not recombine with each other after the comminution of the rubber sheet or the rubber balls, in any case only with difficulty, stick together or clump together. The rubber sections are preferably fed to an extruder for further processing. The dusting or wetting of the rubber sections with cohesive-reducing ingredients before or during processing, preferably in the extruder, substantially reduces the risk of a new lump formation of the rubber sections.

The composition of the further ingredient applied to reduce the cohesion of the rubber preferably agrees with the composition of the same ingredient contained in the formulation.

The additional ingredient applied to the reduction of the cohesion on the rubber therefore fulfills the function of the formulation component on the one hand, and the function of reducing the cohesion of the rubber, in whole or in part, on the other hand.

The amount of the ingredient applied to the rubber to reduce cohesion preferably does not exceed the amount of the ingredient in the total formulation, but is at most equal to that required in the formula.

In the preferential case of pollination or wetting of the rubber sections with the total amount of the intended ingredient, this may lead, inter alia, to the following:
This amount can be underdosed in proportion to the amount that the rubber sections can bind. In this case, this state may be left as is or another cohesive anti-coagulant formulation-related ingredient may be added at this stage of the process.

However, the amount can also be overdosed in relation to the amount that can bind the rubber sections. Then the surplus can be incorporated. The excess amount z. B. in the form of powder is then deposited either by means of a cyclone or vibrating screen or classifier and determines the amount before the material falls into the feed tank of the metering in the extruder or the unrecorded amount is homogeneously mixed with the dusted amount of rubber particles to gravimetrically together to be able to dose.

In the other case that an ingredient-based release agent is not brought into contact, in particular dusted or wetted in the amount with the rubber parts, which corresponds to the amount of the ingredient in the recipe, ie a smaller amount is added, what is said in the penultimate paragraph applies.

In the further case of adding a relatively large amount of the ingredient in relation to the formulation as a release agent, ie an absolute overdose, should not or may not all material from the rubber sections are bound. The excess quantity must be measured or weighed and the amount missing from the recipe must be added to the extruder.

Of course, it is possible to supplement this cohesion-reducing ingredient with conventionally used, additional release agents, although so that the benefits of the invention are no longer fully utilized. Likewise, the presence of conventional impurities which may arise when carrying out such processes does not preclude the invention.

To reduce the cohesion of the rubber can be brought into contact with a present as powder, powder or as a grit or bulk material or granules ingredient, in particular dusted. The powder or powder is a very finely ground dry solid. A grit, granules or bulk material has a coarser consistency than powder or powder.

By way of example and in no way exclusively, the further ingredient applied to the rubber may be a bulk material which is in the form of a granular or particulate mixture in a pourable form. The bulk material is determined by the grain size and the grain distribution as well as the bulk density.

The method according to the invention can therefore preferably comprise the following steps:
It is first identified a powdery or strewed or bulk-like component of the finished mixture. Furthermore, the grinding or other comminution of the rubber is carried out in a mill or another comminution device, wherein preferably a continuous and preferably gravimetrically metered addition of the identified component takes place in order to at least partially cover the surface of the rubber sections or the rubber particles, colonize, in particular dust to prevent the re-sticking together of the rubber parts or rubber particles. The metered amount of the ingredients for application to the rubber can be determined via a measuring device.

Thereafter, a separation of the example, dusted rubber, d. H. Preferably, the rubber sections, and the excess powder, which can be done for example by a Kassiersieb or a cyclone or sifter. The sieved powder, for example, is collected and its mass flow determined. This results in the calculation of a setpoint to properly set the desired concentration of the powdered component in the final mixture.

Should it not be possible to separate and qualify the excess mass flow, the entire precursor consisting of dusted rubber and excess powder must be mixed homogeneously, fed together via a gravimetric dosing to the extruder, the mass flow must be adjusted according to the quantities to again to get exactly the desired finished mixture.

As far as above is spoken of dusting and powder, this applies accordingly also for the further conceivable ingredients in their present or desired material form, such. As powder, grit, granules or bulk material, analogous with respect to the contacting and -Trennen.

Due to the comminution of the rubber, for example due to the grinding of the rubber in a mill, and the above-mentioned addition of an intended in the recipe for the preparation of the rubber material ingredient for the purpose of reducing the cohesion of the rubber creates a - referred to here - precursor ,

In this preferred embodiment, therefore, can be dispensed with the use of non-receptor-required release agent.

The term dusting is understood in a comprehensive sense to also the addition of powdery, granular, grit-like or bulk material, so for example, the powdering, flocking, blowing.

As an alternative to pollination, the further ingredient for reducing the cohesion of the rubber can also be done by applying a wetting mist to the rubber.

The wetting of the rubber can be carried out partially or completely.

The liquid applied to the rubber during wetting can have liquid particles of preferably microscopic size.

However, the liquid can also be sprayed, dripped, rattled.

The applied to the rubber ingredient may be present in any state of aggregation and applied continuously or discontinuously.

The application carried out to reduce the cohesion of the rubber can be carried out with the aid of a metering device. The dosage and the subsequent application of the further ingredient to the rubber can be carried out with all known metering and application devices.

The application of the further ingredient may take place on at least one side, in particular a rubber sheet or a single piece of rubber. However, to intensify the application, it is also possible to dust and / or wet the continuous rubber sheet or individual pieces of rubber separated from each other on two or more sides.

The further ingredient applied to the rubber to reduce the cohesion may be supplied from a separator downstream of the downstream of the point at which the further cohesive reducing ingredient is supplied to the rubber. The separator takes on such ingredient ingredients that were previously added, but not or no longer adhere to the rubber. The separator leads the free ingredient constituents to a renewed pollination or wetting.

Further embodiments of the invention will be explained in more detail with reference to the drawing. Hereby shows:

1 shows a schematic representation of the production process for carrying out the method according to the invention for producing preferably a rubber material.

A worker 1 puts rubber blocks 3 on a conveyor belt 5 that the rubber blocks 3 a cutting machine 2 feeds the rubber blocks 3 in smaller rubber units 4 divided.

The rubber units 4 be on a conveyor belt 31 a mill 7 fed. In the example of 1 fall the rubber units 4 in the funnel 8th the mill 7 ,

Simultaneously with the introduction of rubber units 4 in the funnel 8th In addition, at least one additional ingredient 9 via a dosing device 6 in the funnel 8th brought in. In this example, it is a gravimetric dosing device that continuously produces a controlled amount of powder, e.g. As silica, talc, chalk, carbon black, kaolin or other powdered material that is part of the recipe or material of the rubber compound in the mill 7 admits.

In the funnel 8th the pollination / wetting of the rubber units takes place 4 with the ingredient 9 for at least partially reducing the cohesion of the rubber units 4 ,

In the mill 7 become the rubber units 4 to rubber particles 10 ground.

The rubber particles 10 and the ingredients adhering to the cohesive-reducing rubber 9 be via a conveyor channel 11 a cyclone 12 fed.

Upstream at the top of the delivery channel 11 a fan is sitting 13 containing the mixture of rubber particles 10 and ingredients 9 in the conveyor channel 11 the cyclone 12 supplies.

At the downstream end of the delivery channel 11 is at the cyclone 12 a transfer channel 14 arranged.

The transfer channel 14 leads loose ingredient 9 that in the delivery channel 11 is entrained and not on the rubber particles 10 adheres to the dosing device 6 back.

If the excess ingredient is to be recycled, its mass flow is quantified beforehand.

Alternatively, the cyclone separates the dust-like portion of the transport air and this leads to the / the metering scales 17 - 21 to. In the dosing device 6 becomes the recycled ingredient 9 for re-pollination / wetting of the rubber particles 10 in the funnel 8th the mill 7 introduced.

Downstream behind the cyclone 12 is a metal separator 15 arranged, the foreign body, in particular metal particles from the mixture of rubber particles 10 and ingredients 9 filters out.

The metal separator 15 leads the thus purified mixture of rubber particles 10 and ingredients 9 a stirrer 16 in which the rubber particles 10 and the other ingredients 9 be stirred together. Stirring the components together additionally prevents sticking of the rubber particles 10 and homogenizing the mixture of dusted rubber and excess pollination agent, if any.

Downstream behind the agitator 16 at least one dosing scale closes 17 to 21 at.

The dosing scales 17 to 21 are each gravimetric over filler neck 22 with the extruder plant 23 connected.

For reasons of simplification, is in 1 only a single extruder plant 23 shown.

The extruder plant 23 includes an extruder motor 24 that's about an extruder gearbox 25 with an extruder shaft 26 connected is. The extruder shaft 26 drives extruder screws (not shown) in the extruder housing 27 at.

The over the filler neck 22 supplied rubber particles 10 are in the extruders of the extruder housing 27 with the additional ingredients provided in the recipe of the rubber material 9 . 28 . 29 mixed.

Laterally on the extruder housing 27 are so-called sidefeeder 30 arranged over the other ingredients 9 . 28 . 29 can be introduced into the extruder. Here also the amount of wetting agent which has not yet been completely added during wetting can be added in order to complete the formulation.

LIST OF REFERENCE NUMBERS

1

worker

2

cutting system

3

rubber block

4

rubber units

5

conveyor belt

6

dosing

7

Mill

8th

funnel

9

ingredient

10

rubber particles

11

delivery channel

12

cyclone

13

fan

14

Transfer channel

15

Metal separators

16

agitator

17

weigh feeder

18

weigh feeder

19

weigh feeder

20

weigh feeder

21

weigh feeder

22

filling

23

extrusion line

24

extruder motor

25

extruder gears

26

extruder shaft

27

extruder barrel

28

other ingredient

29

other ingredient

30

sidefeeder

31

conveyor belt

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2012/164424 [0006]
• US 2008/0310251 [0007]
• DE 102009003199 B3 [0009]

Claims (20)

Process for producing a rubber material, in which rubber ( 4 ; 10 ) and solid and / or liquid further ingredients ( 9 ; 28 ; 29 ) are brought together for mutual mixing, characterized in that prior to the combination in an extruder at least one further ingredient ( 9 ) of the recipe on the rubber ( 4 ; 10 ) and the cohesion of the rubber ( 4 ; 10 ) is lowered. Process according to claim 1, characterized in that the rubber ( 4 ; 10 ) a natural or a synthetic rubber ( 4 ; 10 ). Process according to claim 1, characterized in that the rubber ( 4 ; 10 ) is vulcanized. Method according to one or more of the preceding claims, characterized in that the rubber ( 4 ; 10 ) for reducing cohesion with an ingredient ( 9 ) is pollinated. A method according to claim 4, characterized in that the reducing the cohesion causing ingredient ( 9 ) as grit, granules, Rüttelgut or bulk material on the rubber ( 4 ; 10 ) is applied. A method according to claim 4, characterized in that the ingredient causing the reduction of cohesion ( 9 ) in the form of a powder or powder on the rubber ( 4 ; 10 ) is applied. Method according to one or more of claims 1 to 3, characterized in that the rubber for reducing the cohesion with an ingredient ( 9 ) is wetted. Method according to claim 7, characterized in that the ingredient causing the reduction of cohesion ( 9 ) in the form of a rubber ( 4 ; 10 wetting or spraying. Method according to one or more of the preceding claims 1 to 8, characterized in that the rubber before, during or after the application of the ingredient ( 9 ) is crushed. Method according to one or more of the preceding claims, characterized in that the application takes place continuously or discontinuously. Method according to one or more of the preceding claims, characterized in that the further ingredient ( 9 ) on at least two sides of the rubber ( 4 ; 10 ) is applied. Method according to one or more of the preceding claims, characterized in that the metered amount of the ingredient ( 9 ) is determined for application to the rubber via at least one measuring device ( 17 ; 18 ; 19 ; 20 ; 21 ). Method according to one or more of the preceding claims, in which the amount of the ingredient ( 9 ) is chosen so that the amount that is metered corresponds exactly to the amount that should be included in the mixture. Method according to one or more of the preceding claims, in which the ingredient ( 9 ) is in excess, so more than can be bound by the rubber, is metered and the not taken by cohesion of the rubber quantity is determined quantitatively and the missing amount is added. Method according to one or more of the preceding claims, in which the ingredient ( 9 ) is in excess, so more than can be bound by the rubber, is metered and the not absorbed by cohesion of the rubber is mixed in the extruder with. Use of a formulation-related ingredient for the manufacture of a rubber material for the purpose of reducing the cohesion of the rubber. Use of silica for the production of tire material for the purpose of reducing the cohesion of the rubber. Use of a formulation-related ingredient according to claim 13, characterized in that it is applied to the rubber before it is further processed in the extruder. A precursor comprising a formulation-related ingredient for producing a gum material and rubber for further processing in an extruder. A precursor for the production of tire material comprising silica and comprising rubber for further processing in an extruder.

Images