The rubber mixture

 

(57) Abstract:

Usage: gumming rolls, used in textile finishing machines of continuous action (plyaski, washing and impregnating bath and others ). The inventive rubber mixture contains, by weight.h. styrene-butadiene rubber 70, synthetic CIS-1,4 - branch, Rubezhnoe, Ukraine rubber 30, 3 sulfur, N-cyclohexyl-2 - benzothiazolylsulfenamide 1,5; zinc oxide 5, stearic acid 1; molecular complex of resorcinol with hexamethylenetetramine 4, phthalic anhydride 1, white carbon black with a specific surface area of 75-100 m2/g 10-20; kaolin 30-40. The mass ratio of white carbon black and kaolin is 1 (2-3). Use new rubber mixture improves the appearance, roveto and smooth calender sheet and the extruded ribbon, which contributes to production of coatings shafts without hidden defects of an array of rubber. Rubber resistant to oxidative environments and allows to increase service life of the shafts of textile finishing machines. table 2.

The invention relates to the rubber industry, in particular to the rubber mixtures, and can be used for gammirovanie shafts used in textile finishing machines of continuous action (plyaski, washing the th rubbers, sulfur, Sultan-amide C, zinc oxide, isotropin, kaolin, stearin and phthalic anhydride.

Known rubber compound has no resistance to oxidizing environments (for example, to 0.5% acetic acid, chlorite), widely used in dyeing and finishing of fabrics. This rubber mixture having the main filler kaolin has a poor technological properties during molding (extruded tape with a rough surface and tears edges), which does not allow to make shafts for advanced technology wound extruded tape on the core shaft.

The aim of the invention is to improve the technological properties of the rubber mixture and increasing the resistance of rubber to oxidative environments.

This is achieved by a rubber mixture comprising butadiene-styrene and isoprene rubbers, kaolin, sulfur, sulfenamid "C", zinc oxide, isotropin, stearin and phthalic anhydride, according to the invention further comprises a silicon dioxide type BIS-100 at a ratio of silicon dioxide and kaolin 1:(2-3).

The rubber mixture is prepared in industrial rubber mixer by mixing all components (except the vulcanizing group). The temperature in the 100aboutC. the Vulcanization is carried out in electrophorese mode 143aboutWith 70 minutes

The composition of the rubber mixtures is given in table. 1, the properties of the rubbers of the known and proposed mixture in table. 2.

Check the resistance of rubber to the technological work environments textile finishing production has been the most typical major components of water, caustic soda, acetic acid at a temperature of 70 90aboutC.

Dynamic properties of rubber were tested on a two-shaft booth at a speed of 200 rpm (maximum for textile finishing equipment) and linear loads on the floor 30 of 50 kN/m 50 kN/m maximum load in textile finishing equipment).

The heat buildup on the coating surface model roller (outer diameter 120 mm, working width 400 mm, thickness 15 mm), defined as the difference of the surface temperature of the rubber and premises in the range of 30 loads of 50 kN/m, is 22 28aboutWith, for deprecated rubbers at a load of 50 kN/m and is slightly higher: 32aboutWith 4 and 36aboutWith 5.

Compared with the prototype of a new rubber compound is more resistant to oxidative environments and allows to increase service life of the shafts textile Department shall prepare shafts on advanced technologies winding extruded tape on the core.

The RUBBER MIXTURE based on a combination of the best choice and synthetic CIS-1,4-branch, Rubezhnoe, Ukraine rubbers in a mass ratio of 70 to 30, including sulfur, N-cyclohexyl-2-benzothiazolylsulfenamide, zinc oxide, stearic acid, a molecular complex of resorcinol with hexamethylenetetramine, phthalic anhydride and kaolin, characterized in that, to improve the technological properties of the rubber compound and increasing the resistance of rubber to oxidative environments, the rubber mixture further comprises a white carbon with a specific surface area of 75 to 100 m2/g with a mass ratio of white carbon black and kaolin 1 2 3 in the following ratio of ingredients of the rubber, by weight. h

The best choice rubber 70

Synthetic CIS-1,4-branch, Rubezhnoe, Ukraine rubber 30

Sulfur 3

N-Cyclohexyl-2-benzothiazolylsulfenamide 1,5

Zinc oxide 5

Stearic acid 1

Molecular complex of resorcinol with hexamethylenetetramine 4

Phthalic anhydride is a white carbon black with a specific surface area of 75 to 100 m2/g 10 20

Kaolin 30 40

 

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