Two-layer foil production, comprises connecting surfaces of thinner and thicker single thermoplastic foil at infrared radiation source, supplying energy for softening/melting of the surfaces of the foils

摘要

The two-layer foil production in which thickness of surfaces of thinner and thicker single thermoplastic foil between 1 and 50. The softened or melted foil surfaces are led together over entire width and are compressed within 0.1-10 seconds under pressure after heating. The radiation frequency range is set to the maximal absorption of the single foil. The thicker single foil directly absorbs 50 and 90% heat radiation and the thinner foil absorbs 50 and 10% heat radiation. The two-layer foil production in which thickness of surfaces of the thinner and thicker single thermoplastic foils between 1 and 50. The softened or melted foil surfaces are led together over entire width and are compressed within 0.1-10 seconds under pressure after heating. The radiation frequency range is set to the maximal absorption of the material used as the single-foils. The thicker single foil directly absorbs 50 and 90% heat radiation and the thinner foil absorbs 50 and 10% heat radiation. Transportation speed of the foils is regulated and steered at heat radiation source to connect the foils as a function of softening and melting degrees. Independent claims are included for: (1) device for production of two-layer foils; and (2) two layer foil from thermoplastic materials.