The meaning of rubber blending
Improve process performance, performance and technical economics. About 70% of the rubber is processed and used in the form of rubber or rubber.
Rubber process compatibility
By mechanically or otherwise mixing the thermodynamically incompatible systems, a sufficiently stable blend can be obtained which forms a multi-phase morphology in the microscopic region but maintains its uniformity macroscopically.
Factors affecting polymer blending:
Mixing process conditions: time, strength, roll temperature, processing method
Formula composition: raw rubber, blending ratio, compatibilizer, processing aid
[Use all kinds of rubber together]
First, natural rubber + butadiene rubber
NR+BR
Ratio: 75 ~ 50 / 25 ~ 50
Objective: To improve the vulcanization temperature and improve heat resistance, cold resistance, elasticity and wear resistance.
Product: conveyor belt, rubber shoes
Second, natural rubber + styrene butadiene rubber
NR+SBR
Proportion: Any
Purpose: To improve the wear resistance of NR, and to improve the ozone crack resistance of the groove
Product: Tires and other products
Third, styrene butadiene rubber + butadiene rubber
SBR+BR
Proportion: Any
Purpose: to improve wear resistance, elasticity and cold resistance
Product: Tread
Four, styrene butadiene rubber + high styrene
SBR+ high styrene
Ratio: 75 ~ 50 / 25 ~ 50
Purpose: to improve wear resistance, tear strength and tensile strength
Sole and sponge glue
Five, styrene butadiene rubber + high density polyethylene
SBR+HDPE
Proportion: 100 / 5 ~ 20
Objective: To improve the process performance, reduce the scorch tendency and shrinkage of the rubber, and improve the wear resistance and ozone resistance of the vulcanizate.
Product: sole and sponge
Sixth, ethylene propylene rubber + butyl rubber
EPDM+IIR
Ratio: 50/50
Purpose: Improve tear resistance, heat resistance, ozone resistance; improve tread wear resistance
Products: tread, inner tube, etc.
Seven, ethylene propylene rubber + chlorobutyl rubber
EPDM+CIIR
Ratio: 50/50
Purpose: Improve ozone resistance
Product: sidewall
Eight, butadiene rubber + ethylene propylene rubber
Butadiene rubber + EPDM
Proportion: Any
Purpose: Improve heat resistance, ozone resistance, chemical resistance
Product: Tread
Nine, nitrile rubber + pvc
NBR+PVC
Proportion: Any
Objective: To maintain the oil and heat resistance of NBR; improve ozone resistance, wear resistance, flame resistance and dielectric properties
Products: oil resistant tape, shoes, hose, wire sleeve
X. Nitrile rubber NBR + phenolic resin
Proportion: Any
Objective: To improve the viscosity, hardness, wear resistance and strength of NBR
Product: Washer, lining
11. Nitrile rubber + natural rubber or styrene butadiene rubber
NBR+NR or SBR
Proportion: NR or SBR ≤ 40%
Objective: To improve the cold resistance of NBR and reduce the cost, but the other properties of NBR are slightly reduced.
Product: oil resistant sole, leather bowl
Twelve, nitrile rubber + neoprene
NBR+CR
Proportion: Any
Purpose: Improve weather resistance and ozone resistance
Product: Outdoor oil resistant products
Thirteen, nitrile rubber + ethylene propylene rubber
NBR+EPDM
Purpose: Improve weather resistance and ozone resistance
Fourteen, neoprene + natural rubber
CR+NR
Ratio: 80/20
Purpose: To improve the process performance of CR
Product: conveyor belt or cover tape
15. Neoprene + nitrile rubber
CR+NBR
Proportion: Any
Objective: To improve the sticking, pressing, calendering and oil resistance of CR
Sixteen, neoprene + butadiene rubber
CR+BR
Proportion: 90~60 / 10~40
Objective: To improve the cold resistance, wear resistance, elasticity, etc. of CR, and significantly improve the process performance of extrusion, calendering, sticking roller and scorch.
Product: Tape, shock absorbing rubber
[Typical rubber and plastic use]
1. Blend of PVC and rubber:
Compared with NBR, NBR/PVC has improved strength, flame retardancy, abrasion resistance, solvent resistance and ozone crack resistance, and the processing properties and foaming properties of the sponge are significantly improved;
Second, PE and rubber blends:
PE and NR and other rubber blends have good effects;
Third, high styrene and rubber blend:
The high styrene and rubber blending material has high strength, wear resistance, easy processing, and smooth surface of the semi-finished product.
Four, three ethylene propylene diene monomer / polypropylene (EPDM / PP)
Excellent weather resistance, ozone resistance, UV resistance and good high temperature and impact resistance. Its oil and solvent resistance is comparable to that of general-purpose neoprene rubber. It can be processed by ordinary thermoplastic processing equipment. Low cost, continuous production and recycling.
