PRODUCT RESTORING ITS SHAPE UPON HEATING, UNIT CONTAINING SUCH PRODUCT, AND METHOD FOR DETERMINING FULL RESTORATION OF PRODUCT UPON HEATING Russian patent published in 1998 - IPC

FIELD: shape-restoration memory. SUBSTANCE: in a product self-restoring on heating, embossing is made on at least a part (20%) of the first surface of product, whereas embossed surface is made in such a way as to acquire flat state when enough heat is supplied to full restoration of embossing. In addition, an adhesive layer is applied on the second surface of product. Embossing on the first surface has depth at least 0.05 mm, preferably 0.075 mm. Product is executed in the form of hollow tube, sheet, or layered base. In particular, product in a unit is made in the form of wrap sheet with its longitudinal edges overlapping each other. There is also faceplate in unit overlapping longitudinal edges of sheet. Faceplate comprises polymer element having first and second surfaces. At least a part of the first surface has embossing and the second one abuts on the product. Product in unit is supported by a tube. EFFECT: facilitated shape-restoration memory control. 11 cl, 6 dwg