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NBR-PVC Blend NPR70 SCCARE NPR70 is the most popular and widely used grade of fluxed NBR/PVC in the polymer ratio of 70-30. It is a non-staining, oil, ozne, abrasion, weather and flex resistant polymer using medium Acrylonitrile Butadiene Rubber with Poly Vinyl Chloride Resin.
Processing Characteristics: Easily processible on conventional Rubber processing/compounding machines. Very good filler and plasticizer absorption makes compounding cycle quick, cost saving and labour saving. Warm mixing mill compounding is recommended for best results. Can easily withstand elevated compounding temperatures. Recommended plasticizers are DOP, DOA, DOS, DBP, TCR, CPO and other Aromatic Plasticizers. Paraffinic based softeners are not recommended. Typical Properties of Raw Polymer:
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Polymer Ratio
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70:30
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Specific Gravity
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1.04+ 0.02
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Raw Polymer Hardness,Shore A
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50 + 5
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Mooney Viscosity (ML 1 +4@100oC)
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50 + 5
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Extraction Percentage, Min.
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9
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Stabilizer
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Non-staining
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Curing:
Sulphur or Peroxide curing systems to be used. NBR/PVC is slow curing hence a high dosage of accelerators are recommended.
Applications:
Gasoline Tubing and Hoses, LPG Tubing, Auto Parts, Gaskets, Oil Seals, Oil Resistant Shoe Soles, Rubber Sheets and Extruded Rubber Parts, Textile Cots, Aprons, Industrial Textile and Printing Rolls. Expanded Sheets for insulation and a variety of other applications where special properties are required. Packaging:
25kgs Laminated HDPE Bags
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