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J. Allcock & Sons GRP BRI 75R (BT.999)

J. Allcock & Sons GRP BRI 75R (BT.999) is reclaimed rubber made from Butyl inner tubes, together with reclaiming aids. After processing, the reclaim is first screened and then refined by milling. The very thin sheets resulting from this process are piled up to form a blanket approximately 10mm thick. It is PBN free and PAH conformant.

Polymer Name: Butyl Rubber (IIR)

Physical Form: Sheets

Features: Cost Effective, Flexible, Good Processability, Soft

Tensile Strength: 7.35 - 7.35 MPa

Color: Black

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Identification & Functionality

Polymer Name
Technologies

Features & Benefits

Labeling Claims
Why Should You Use It?
  • Cost advantages
  • Improved processability

Applications & Uses

Uses

GRP BRI 75 R Butyl Reclaim is used in butyl rubber compounding to reduce costs and increase processability.

Properties

Color
Physical Form
State of Refining
Superfine
Typical Properties
ValueUnitsTest Method / Conditions
Elongation at Breakmin. 480%-
Hardness51 ± 3Shore A-
Mooney Viscosity (ML 1+4 at 100°C)37 ± 8--
Sheet Sizemax. 20mm-
Specific Gravity1.14 ± 0.02g cm3-
Tensile Strengthmin. 75kg/cm2-
Acetone Extract (by weight)9 ± 3%-
Ash Content (by weight)5 ± 2% -
Carbon Black (by Weight)32 ± 4% -
RHC (by weight)min. 50% -
Volatile Matter (Moisture, by weight)max. 1% -
Properties
  • Soft
  • Pliable
  • Easy to process
  • Will act as a process aid in new compounds
  • "Shape retaining" due to the new 3D structure
  • Capable of being re-vulcanized

Technical Details & Test Data

How is Reclaim Produced?

The waste rubber is granulated quite small to release and facilitate the removal of any metal and fabric that may be present.It is then subject to a combination of heat, pressure and chemical softening /plasticising agents for a period of time in a large retort.After discharge, the treated waste is refined to remove any nibs or hard bits of unprocessed material. This is done by extruder sieving and/or a refining mill.The material passes repeatedly through the mill and the coarse "bits" are pushed out to the sides of the mill nip (the wider part, due to the camber) and fall out into catchment trays at each side. The good, refined material is taken off the mill as a paper thin sheet and wound up on itself to make thick slab. The material from the sides can be used to make lower grade, coarser "tailings" reclaim.

Packaging & Availability

Packaging Type
Packaging

Each blanket weighs approximately 5 kilos. Whole and cut blankets are made up to 25 kilos nett, and this amount is then packed in polyethylene bags on pallets, and shrink- wrapped. 40 such parcels are packed onto a strong pallet, so giving a unit load of 1,000-kilos net weight. The pallets have overall dimensions of 1,120mm x 1,120mm x 1,120mm and should not be double stacked. Alternative methods of packaging are also available.

Storage & Handling

Storage

Recommended conditions are dry storage in a cool atmosphere. There will be a slow increase of Mooney viscosity on storage, for which a maximum of one year is recommended.