process for the manufacture of a wall film, big rubber latex of plantation by the immersion method

摘要

the invention refers to a process to achieve with walls thick films of natural rubber latex by the method imersiei intended for getting technical articles and articles of general consumption.in order to create film thickness of 2.0 mm at the time of immersion...7,0 30...120 s, forms of immersion of metal or ceramics are fashioned in a etuva heated with hot air or a bath with hot water at a temperature of 60.70 degree c, going then placing them for 1's in a solution of component: 45 50 parts water, 20 to 30 parts alcohol, 94 96%, 30...35 parts calcium chloride, 0.01 parts alchilfenoletoxilat with degree of etoxilare n = 10, what maintain solution at a temperature of 25.30 degree c, after which dries the ambience temperature curves for 1...2 min going then immersing latex mixture type: natural rubber latex 167,0 parts 60%, 2.0 parts poliglicoleter aromatic solution in distilled water, 6.5 parts 29% formaldehyde, 2,0 parts colloidal sulphur, 1.2 parts zinc oxide active, 0.8 parts dietilenditiocarbamat zinc, 1,0 parts 2,2 methylene bis (4 - 6 - methyl tert butylphenol)five parts naftalin - sulfonic acid salt water solution 5%, 17% polivinilmetileter 5.5 parts, film obtained is dried by atmosphere temperature for 10 15 min, followed by a drying time of 20.30 min, at a temperature of 70 80 degree c and d a vulcanisation, for 1 2 h at a temperature of 110 degree c...120 depending on film thickness.