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Oldworker  Abrasives  Manufacturing Limited
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  3. Coated Abrasives...

Coated Abrasives

1.1 Coated Abrasives

Coated abrasives are available in a variety of forms including sheet, disk, roll, and belt and can be used for a range of applications from very light to heavy duty. A coated abrasive consists of an abrasive held in a backing material by an appropriate bonding medium (Fig. 3). The backing material serves as the base upon which a coating of an adhesive known as the make coat is uniformly applied to anchor a single layer of an abrasive. A typical make coat comprises of a solution containing ∼48% phenol formaldehyde resin and ∼52% calcium carbonate filler. Usually, abrasive grains with a long aspect ratio are specially prepared and used for this application (Fig. 4). Individual abrasive particles are applied uniformly to the “make” coat and oriented by an electrostatic field to maximize the probability that an abrasive will be positioned with its major or long axis perpendicular to the backing material.After the make coat hardens (generally precured for ∼30 minutes at 107 °C), a second coating of adhesive known as the “size” coat (of a similar composition as the make coat) is applied for anchoring the abrasives strongly to the backing material and cured for ∼10 hours at 107 °C. A wide range of abrasives both natural and synthetic is used for coated abrasive applications. They include conventional abrasives such as the various alloys of alumina, sintered sol-gel alumina, SiC, emery, garnet, flint as well as superabrasives, diamond, and cBN. They are available in all grit sizes (36–600) for a wide range of applications. The coated abrasive can be either open-coat abrasive (∼50–70% of its backing surface is covered with the abrasive) for free cutting action or closed-coat (>70%) for obtaining high removal rates.

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Product Categories

  • Cut off discs and Grinding discs
    • Work with Metal cut off discs
    • Work with Inox and Stainless Steel
    • Work with Stone wheel
  • Fibre Disc
  • INDUSTRIAL BRISTLE DISC
  • Super Abrasives
    • Diamond sanding strips
    • Diamond Hand Pad
    • Diamond Lapping Film
    • Diamond Flap Disc
    • Diamond Belt
    • Diamond Roloc Disc and Diamond Quick Change Disc
  • Flap Disc
    • Aluminum Oxide Flap Disc
    • Zirconium Flap Disc
    • Ceramics Flap discs
    • Felt Flap disc, Non woven Flap Disc
  • Flap Wheel
    • Mini Flap Wheel, Mounted Flap Wheel
    • Unmounted Flap Wheel, M14 Flap Wheel
  • Cork Sanding Block
  • Clean and Strip Disc
  • Backing Pads
  • Metalplus Disc
  • Abrasives Cloth, Sand Belt
  • Mounted Points
  • Sand Paper
  • Back Up Pad
  • Hook and Loop Disc, Sanding Disc
  • Vacuum Brazed Wheels
    • Vacuum brazed wheel
  • Micro Diamond Powder
  • Bench Grinding Wheel
  • Abrasives Grains
  • Abrasives Cup Wheel
  • Non Woven Polishing

Links

LatestPost

  • Coated  Abrasives
    Coated Abrasives
    2022-12-26
  • Fibreglass Backing Pads
    Fibreglass Backing Pads
    2023-01-28
  • Brown fused alumina
    Brown fused alumina
    2023-02-07

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