FIELD: chemical industry; production of the polyolefin sheets for thermomolding.
SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to the sheets for thermomolding containing at least one layer made on the basis of the statistical propylene polymer or the propylene polymeric composition on the basis of the statistical polypropylene polymer. At that the statistical propylene polymer contains at least 0.8 mass % of ethylene and, possibly, one or severalC4-C10 α-olefins, and the propylene polymeric composition on the basis of the statistical polypropylene polymer contains at least 0.8 mass % of one or several copolymers chosen from ethylene and C4-C10 α-olefins. The indicated polymer or the polymeric composition have the fusion point of 155°C or above, have the fraction content dissoluble in xylene at the room temperature, less than 4 mass %, and with the value of ratio of the amount of the polymeric fraction, collected in the temperature range from 25°C up to 95°C, to the amount of the fraction dissolved in xylene at the room temperature, exceeding 8. The sheets according to the true invention are characterized by the wide range of the operational conditions for the thermomolding, the essentially improved balance of a shock resistance/rigidity and improved optical properties of the products manufactured out of them by the method of thermomolding of the sheet-type thermoplastics.
EFFECT: the invention ensures, that the polyolefin sheets have: the wide range of the operational conditions for the thermomolding, the essentially improved balance of the shock resistance/rigidity, improved optical properties of the products manufactured out of the sheets by the method of thermomolding.
5 cl, 4 tbl, 4 ex
