In 1946, the company was nationalized and on 1 January 1948 it was renamed Tovarna vate in sanitetnega materiala Vata – Domžale. The company was joined by two companies from Domžale, which raised its number of employees to over 200. In 1948, a Vata plant was set up in Slovenska Bistrica where for three years bandages were produced with weaving machines. From 1954 to 1972, a weaving plant was set up in the vicinity of Domžale, at Študa.
In 1959, the first reconstruction was carried out due to the continuing rapid growth of the company. New facilities were constructed by the main road and the company invested in state-of-the-art technology. At the time, the company already employed 450 people.
In 1961, the company commenced the production of cigarette filters which was active for nearly 30 years and provided the company with extra development drive. In 1962, the company set up a plant for the production of “cotton filling” for blankets in Krašnja, raising the number of employees to over 500. From 1956 until recent years, the company conducted business with the Senožeče Textile Factory that was engaged in the production of textiles. On its 40th anniversary, the company was already a proud owner of a new weaving plant, warehouse and a ready-made clothes production set up on an added floor in the building.
In 1967, following the purchase of state-of-the-art technology, Vata became one of the largest manufacturers of cigarette filters in Europe. On 1 January 1969, Vata was renamed Tosama – hygienic products factory.