FIELD: chemical industry; methods of production of the cloth-shaped laminates with a cruciform arrangement of the layers.
SUBSTANCE: the invention is pertaining to chemical industry, in particular to the methods of production of the cloth-shaped laminates with a cruciform arrangement of the layers used for manufacture mainly of bags made out of the such material and having a shape of a pipe, or a folded laminate cloth with a cruciform-shaped arrangement of layers manufactured out of two or more linked to each other oriented films. The film(s)of the laminate representing A-component is (are) placed on one side of the laminate with a cruciform arranged layers and has (have) the main or resulting direction of orientation essentially corresponding to the longitudinal direction of the cloth. The film(s) the laminate, representing B-component is (are) placed on the other side the laminate with a cruciform arrangement of the layers and has (have) the main or resulting direction of orientation essentially perpendicularly to the longitudinal direction of the cloth. The modulus of elasticity of the A- component material being in a non-oriented state is at least by 15 % below the modulus of elasticity of the B-component material being in a non-oriented state. The A- and B-components have different thermal shrinkage along the longitudinal direction of the laminate cloth. At that the thermal shrinkage of A-component is more, than the thermal shrinkage of B-component. The bags made out of the laminate with cruciform-shaped arrangement of the layers have the thermal-welded seams with the heightened strength for delamination at an impact.
EFFECT: the invention ensures, that the film of the laminate representing A-component has a bigger thermal shrinkage, than film of the laminate representing B-component, and the thermal-welded seams of bags have the heightened strength for delamination at an impact.
22 cl, 12 dwg, 2 tbl, 1 ex
