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NBR-PVC Blend NPR50 SCCARE NPR50 is a 50:50 ratio fluxed blend of NBR/PVC using medium NBR and pretreated PVC resin. Special polymeric Plasticizers and Additives are incorporated to improve hot air ageing and flex crack. These special polymeric plasticizers also help to keep the product flexibility longer in service life. It blends easily with Nitrile Rubber to increase the Nitrile Rubber percentage ratio if required in the compound in order to make a tailor-made ratio of NBR/PVC by the user. Processing Characteristics SCCARE NPR50 is processed on conventional open mixing mills and internal mixers. The user can easily change the Nitrile ratio in the blend since SCCARE NPR50 blends easily with the Nitrile Rubber on conventional Rubber mixing machines. For best results it is recommended that the mixing machines be kept hot during compounding stage for a quicker and a better homogenous compound. It is designed to withstand higher compounding temperatures. Typical Properties of Raw Polymer
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Polymer Ratio
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50:50
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Specific Gravity
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1.11 + 0.02
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Raw Polymer Hardness,Shore A
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60 + 5
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Mooney Viscosity (ML 1 +4@100o C)
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60 + 5
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Extraction Percentage, Min.
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12
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Stabilizer
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Non-staining
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Curing
Normal Sulphur and Peroxide curing systems. Since NBR/PVC is slow curing, the accelerator dosage should be appropriately increased. Applications
It is a highly recommended grade for products requiring very high ozone and oil resistance. It is also recommended for non-black/coloured compounds. Extruded profiles and products will give smooth, sharp and glossy finish. It is recommended for LPG tubing and hoses, fuel tubes and other moulded products.
Packaging
25kgs Laminated HDPE Bags.
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