Bitumen Carpet Tile Backing
Bitumen Carpet Tile Backing
The carpet tile is produced by coating a thick backing layer of a rubber-modified bitumen coating composition onto a secondary backing sheet material and separately coating a first precoat layer comprising a hot melt petroleum resin or bitumen and a second layer comprising a hot melt bitumen composition containing a flexible vinyl adhesive resin, like ethylene vinyl acetate, onto a fibrous back surface of a carpet material having a primary backing sheet containing a fibrous face wear surface and laminating the surface of the second layer to the surface of the backing layer to provide a carpet tile having dimensional stability, good lay flat characteristics and capable of production by an in-line production method.
Benefits of Using our Bitumen in the Back Side of Carpet Tile:
- better acoustics, air quality, and walking comfort
- easy to install, maintain and replace
- excellent safety, creativity, and sustainability
- protect the carpet against moisture
- How to make bitumen carpet tile
The hot melt bitumen or bitumen-modified composition is applied to this secondary backing sheet in an amount ranging from about 40 to 125, but more typically, 75 to 100 ounces per square yard of the hot melt coating composition on the secondary backing sheet. In the method of producing the carpet tile, the secondary backing sheet is separately coated with the hot melt bitumen or bitumen-modified composition containing the thermoplastic, rubbery polymeric material which is then allowed to cool. Subsequently, then, the exposed surface of the bitumen rubbery-containing material coating layer is laminated to the hot, tacky surface of the second precoat layer of the bitumen, resin-containing composition to provide for a laminated carpet tile construction. After the lamination step, the carpet material is subsequently cut into desired carpet tiles and then packaged.
Finishing of Tufted Carpets
The key finishing process for tufted carpets is backing coating, which has several important functions:
- to bind the tufts to the backing fabrics;
- to improve fibre bond;
- to provide dimensional stability;
- to add weight to the carpet to improve laying properties, and possibly
- to impart particular performance features.
Backcoating, in effect, transforms the tufted cloth into a practical carpet.
What grade of bitumen is using in backside coating of carpet tile?
The best grade to use in the back side of carpet tile is oxidized bitumen 105/15 as below specification.
| Bitumen 105/15 | Test method | Unit | Specification |
| Specific gravity @25/25 C | ASTM D70 | (Kg/m3) | 1.05 approx. |
| Penetration @ 25°C | ASTM D5 | mm/10 | 10/20 |
| Softening point °C | ASTM D36 | °C | 100/110 |
| Ductility @25 °C | ASTM D113 | Cm | 1.5min |
| Loss on heating(wt) % | ASTM D6 | Wt. % | 0.2 max |
| Flashpoint °C | ASTM D92 | °C | 260 min |
| Solubility is CS2(wt) % | ASTM D4 | Wt. % | 99.5 max |
| Specific gravity @25/25 C | ASTM D70 | (Kg/m3) | 1.05 approx. |
