According to the different plastic film manufacturing method, it can be divided into pressure Ting film, blown film; according to some special properties of plastic film , respectively, it has seedling film, no drop film, colored film, thin covering film, film width, packaging films etc. According to the different thickness and width of plastic film, there are different kinds of specifications. Hips 476l injection molding grade Yangzi BASF hips 466f injection molding grade Yangzi BASF hips 495F injection molding grade Yangzi BASF GPPS pg33 injection molding grade Taiwan Chimei GPPS 666d general level of Yanshan Petrochemical
The measurement of thickness and refractive index of dielectric thin film by ellipsometry is widely used in modern science and technology. Therefore, the measurement of thin film technology has been greatly developed, ellipsometry is one of the most accurate methods of measuring thin film developed since 70s with the wide application of electronic computers. Ellipsometry measurement has the following characteristics: Can measure a very thin film (1nm), and the accuracy is very high, 1-2 orders of magnitude higher than the interference method. Is a non destructive measurement, without special preparation of samples, nor damage to the sample, compared to other precision methods: Such as weighing method, quantitative chemical analysis method is simple and convenient. The thickness, refractive index and absorption coefficient of the film can be measured simultaneously. So it can be used as an analytical tool. Is very sensitive to some surface structure, surface process and surface reaction. Is a method of studying surface physics.
1 appearance. Should be smooth, bright, uniform thickness, transparency. Does not allow to have the obvious "watermark" or piece of "cloud" formated on the surface of the film because of the low processing temperature of the raw material resin is not sufficient plasticization, Bubble, perforation and rupture are not allowed. Impurities that exceed 0.6mm are not allowed . Not allowed to have 2mm or more of the particle size and bulk material due to the formation of the resin. Does not allow a clear "stripe" exists, not obvious "stripes" refers to the hand at room temperature to tear (two thumb distance LCM, similar to the pull cloth posture), when the tear was zigzag, should not be a straight line. Allows a small amount of live fold to be inserted and folded neatly (in order to form a bundle of thin film coils). 2 film should be kept in a cool and dry room, not to squeeze as far as possible , away from the heat source or less than 1m, the effective quality assurance period of one year. 3 width (fold diameter thin film width, unriven at double) greater than 1500mm film thickness deviation of plus or minus 0.005mm allows ultra width of 20mm, and the kind of not more than two. The thickness of not less than 0.08mm.
