| 摘要 |
Press comprises two pressing plates, between which the material is pressed to form a film. One of these plates has, in its pressing surface, a circumferential groove (28) for receiving and collecting the excess specimen material. Pref. this plate is composed of an outer ring (26), with an inner plate (27) inside it, the outer ring having a surface which projects above the pressing surface of the inner plate to form an abutment surface (29) which comes into contact with the opposite pressing plate (not shown). The circumferential groove (28) is formed at the joint between the ring and the plate. Thus the film is formed to a uniform depth defined by the amount of projection of the ring beyond the surface of the plate. - In particular for the production of a thin specimen of thermoplastic material, such as polyethylene or PVC, for IR analysis. A thin film of very good quality and constant thickness is produced by a simple method.(8/12) |
