Rubber Sheeting

SBR/NR General Purpose Rubber Sheet

Beijing Dewei Rubber & Plastic Products Co., Ltd is  a leading Chinese NR/SBR Rubber Sheeting producer. Besides quality control measurements other manufacturers had invested, we have strict tolerance control on thickness by three points laser measuring instruments in our production. Ours Products are fully compliant to REACH, ROHS and PAH standards.

 

The High Quality NR/SBR blended Rubber sheet is a good gasket material due to excellent physical properties. Natural rubber has superior resilience, tensile, elongation and abrasion resistance, good low temperature flexibility and compression set and excellent adhesion to fabric and metals.

Vulcanized rubber sheets made from blend of good quality dry natural rubber, Synthetic styrene-Butadiene rubber and small quantity of reclaimed rubber, containing additives such as antioxidants, mineral and carbon black fillers for reinforcement and chemicals for vulcanization.

 

Rubber SBR has outstanding resistance to heat, moisture, and heavy abrasions, it is the perfect synthetic rubber material for industrial applications. It provides the smooth finish and enhanced durability gained by the solid rubber in the vulcanization process. SBR makes a great protective barrier because it can absorb shock, limit vibration, and reduce noise.

 

 

 

 Important knowledge before purchase:

 

  • A lot of producers will use low cost reclaimed rubber and low quality additive oil in production, which caused odor smelling in finished products. these type of products will continue giving out such smelling when clients bring them home or office place.   
  • some producers won't screen the rubber materials and its mixers at the beginning and before calendering process, which won't get rid of remains of metal parts or metal pieces from relcaimed/recycled rubber process, therefore, the rolls of rubber sheets with metal pieces may damage the machine tools in stamping process if these rolls are to be processed into rubber gaskets or seals.
  • we have taken measurement and investment of facility to avoid metal pieces in our process, we will hold full responsibility to bear the cost of above damages and surely use food grade oil and environmental raw materials to help you prevent any risk in your business. 

 

Quality
Hardness
Shore A
Specific gravity
(g/cm³)

Tensile

strength

Elongation Tear
resistance
Color
Economy NR/SBR 65±5 1.5±0.05 2.5MPa 200(%) 10N/mm Black
NR/SBR 50±5 1.35±0.05 3MPa 250(%) 15N/mm Black
NR/SBR 60±5 1.45±0.05 3MPa 250(%) 12N/mm Black
NR/SBR 65±5 1.5±0.05 3MPa 250(%) 12N/mm Black
NR/SBR 70±5 1.5±0.05 3MPa 250(%) 12N/mm Black
NR/SBR 80±5 1.55±0.05 3MPa 150(%) 15N/mm Black
NR/SBR 85±5 1.55±0.05 3MPa 100(%) 15N/mm Black
NR/SBR 90±5 1.65±0.05 3MPa 80(%) 15N/mm Black
Red NR/SBR 65~80±5 1.7±0.05 3.5MPa 250(%) 15N/mm Red
Grey NR/SBR 80±5 1.7±0.05 3.5MPa 250(%) 15N/mm Grey
Di-Electric Sheet
BS 921 IEC 61111
65±5 1.4±0.05 3MPa 250(%) 12N/mm Black
Anti-Static &
Retardant Sheet
80±5 1.5±0.05 5MPa 250(%) 15N/mm Black

 

Question: Why are the rubber sheets you received is harder than you ordered from some Chinese companies. 

Answer: Some producers produce rubber sheets with very high temperature and high speed rotocurer rotation, so that they can get high productivity. However, the rubber sheet hardness will increase or decrease after some time. the short vulcanization time gives qualified hardness when the rubber is produced, but the inside of the rubber sheet is over vulcanised or less vulcanised, depending on the thickness of the rubber sheet. when these rubber sheets are packed, it will continue the vulcanisation in transportation or storage. normally the rubber gets harder than specified.