The significance and function of rubber blending are briefly described

The significance of rubber blending is to improve the process performance, service performance and technical and economic performance. More than 70% of rubber is processed and used in the form of rubber or rubber and plastic.
The process compatibility of rubber, through mechanical methods or other conditions, the thermodynamic incompatible system can be mixed to obtain a sufficiently stable blend, which forms a multiphase morphology in the micro region, but still maintains its uniformity in the macro.
Factors affecting polymer blending:
Mixing process conditions: time, strength, roll temperature, processing method
Formula composition: raw rubber, blending ratio, compatibilizer, processing aids
[all kinds of rubber are used together]
1、 Natural rubber + CIS polybutadiene rubber
Nr+br ratio: 75 ~ 50 / 25 ~ 50
Objective: to improve the vulcanization temperature, heat resistance, cold resistance, elasticity and wear resistance
Products: conveyor belt, rubber shoes
2、 Natural rubber + styrene butadiene rubber
Nr+sbr ratio: any
Objective: to improve the wear resistance of NR, which can be used in tire tread to improve the ozone cracking resistance of tread grooves
Products: tires and other products
3、 SBR + CIS butadiene rubber sbr+br ratio: any
Objective: to improve wear resistance, elasticity and cold resistance
Product: tread
4、 Styrene butadiene rubber + high styrene
Sbr+ high styrene ratio: 75 ~ 50 / 25 ~ 50
Objective: to improve wear resistance, tear strength and tensile strength
Product: sole and sponge glue
5、 Styrene butadiene rubber + high density polyethylene
Sbr+hdpe ratio: 100 / 5 ~ 20
Objective: to improve the process performance, reduce the scorch tendency and shrinkage of rubber compound, and improve the wear resistance and ozone resistance of vulcanizate
Product: sole and sponge glue
6、 Ethylene propylene rubber + butyl rubber
Epdm+iir ratio: 50/50
Objective: to improve tear resistance, heat resistance and ozone resistance; Improve the wear resistance of tread
Products: tread, inner tube, etc
7、 Ethylene propylene rubber + chlorinated butyl rubber
Epdm+ciir ratio: 50/50
Objective: to improve ozone resistance
Product: sidewall
8、 Butadiene rubber + ethylene propylene rubber butadiene rubber +epdm
Proportion: any purpose: to improve heat resistance, ozone resistance and chemical resistance
Product: tread
9、 Nitrile rubber +pvc nbr+pvc
Scale: any
Objective: to maintain the oil resistance and heat resistance of NBR; Improve ozone resistance, wear resistance, flame resistance and dielectric properties
Products: oil resistant tape, shoes, hose, thread cover
10、 Nbr+ phenolic resin ratio: any
Objective: to improve the viscosity, hardness, wear resistance and strength of NBR
Product: gasket, lining
11、 Nitrile rubber + natural rubber or styrene butadiene rubber
Nbr+nr or SBR ratio: NR or SBR ≤ 40%
Objective: to improve the cold resistance and reduce the cost of NBR, but other properties of NBR are slightly reduced
Product: oil resistant sole, leather bowl
12、 Nitrile rubber + neoprene nbr+cr
Scale: any
Objective: to improve weather resistance and ozone resistance
Product: outdoor oil resistant products
13、 Nitrile rubber + ethylene propylene rubber nbr+epdm
Objective: to improve weather resistance and ozone resistance
14、 Cr+nr ratio of neoprene + natural rubber: 80/20
Objective: to improve the technological performance of CR
Product: conveyor belt or covering glue
15、 Neoprene + nitrile rubber
Cr+nbr ratio: any
Objective: to improve the roll sticking, extrusion, calendering and oil resistance of CR
16、 Neoprene + CIS polybutadiene rubber
Cr+br ratio: 90 ~ 60 / 10 ~ 40
Objective: to improve the cold resistance, wear resistance and elasticity of Cr, and significantly improve its processing properties such as extrusion, calendering, roller sticking, scorching, etc
Product: adhesive tape, shock-absorbing rubber