| 摘要 |
<p>A backing film for incorporation as a backing layer in a resilient floor covering or a floor tile having at least two laminae and a method for making such a backing layer whereby wastage is reduced when the colour of the upper lamina is changed. Where there are two backing films having two or three laminae making up the backing layer the intermediately coloured film resulting from a change in the colour of the upper lamina can be utilised without further processing on the second backing film where colour is not essential. Where there are three laminae making up a backing film the desired colour is introduced and established in the bottom lamina before the supply of the original colour to the upper lamina is stopped. The film can then be turned over for use with the former bottom lamina becoming the upper lamina.</p> |
