Printing Roller Material RWCA-28A

Key feature

● Low hardness: 28A

● Curing agent: TDI 80

● Excellent chemical resistance

● Outstanding oil resistance

Application
Ink rollers, printing rollers, electronic industry and other industrial materials.
Technical Product Data

Hydroxyl value (mg KOH/g)

59 ± 3

Acid value (mg/KOH/g)

1.5-2.5

Color (APHA)

400 

Viscosity (CPS/ 40)

3500-8500

Processing

Vacuum condition 

Vacuum

 

0 -20 mm Hg

Temperature

RWCA-28A

60-70

Vacuum time

 

30-60 MIN

Mixing temperature

RWCA-28A = 60-70 
TDI 80 = Room temperature

Casting

Mold temperature 80℃. Slowly pour the mixture in mold and avoid air bubble into mold. Then, increase mold temperature to 120℃. Demold time is 3 hours, post curing time is 16 hours.

Physical properties

RWCA-28A (by weight)

100%

TDI 80

8.5%

Hardness (Shore A)

28A

Tensile strength (kg/cm3)

11

Elongation (%)

500

Type

Polyester

Production Processing
Packing

RWCA-28A: Net weight 18 kgs can / Net weight 200 kgs drum

Storage & Shelf - life

RWCA-28A is supplied in drums or cans. Once a container has been opened, please pay attention to exclude moisture. The most favorable temperature for storage is 20-30℃. The shelf-life of RWCA-28A is 6 months if the temperature is maintained at 20-30℃, and moisture is excluded. The information and data contained herein are believed to be correct. However, no liability is accepted. We preserve the right of revision for this information sheet.

 

Notice: These values are based on the test of our present laboratory test specimens.