| 摘要 |
In the manufacture of slot linears from polyethylene terephthalate film by bending inwards the margins of a tape of the film, cutting the tape to the required size and bending the cut tape to the required shape, cracking and fibrillation of the film is prevented by using polyethylene terephthalate containing 0.25 to 10% by weight of inert particles of 0.1 to 2.0 microns average particle size. Specified particulate materials are titanium dioxide, silicates and silico-aluminates such as china clay. The particulate materials are preferably added during the preparation of the polyester. The polyethylene terephthalate may be oriented in either or both directions of the plane of the film. |
