摘要:
A method of and apparatus for producing continuous surface elements, e.g. for so-called air supported shelters, according to which a tubular foil, preferably of plastic material, is wound in several layers between two drums spaced from each other by a distance substantially equaling half the width of the surface element or integral multiples thereof. Immediately prior to winding the tubular foil between the drums, adhesive is applied to the foil so that the outward side of the tubular foil on a preceding winding adheres along a greater or less path to the inward side of the tubular foil in the following winding. After winding a suitable number of loops, in conformity with the desired length of the surface element, the windings are cut mainly perpendicularly with regard to the longitudinal direction of the tubular foil, whereupon the two outer tubular foils in the stack thus obtained are pulled from each other along their whole length, and suitable braces may be introduced into each individual tubular foil section.
摘要:
A laminate of two films is prepared by partially or completely covering a surface of a first film with a layer of ink comprising a catalyst suitable for accelerating curing of an adhesive for films and, subsequently, applying such an adhesive between the layer of ink and a second film before curing the adhesive.
摘要:
A laminate is prepared that can be further treated comparatively soon after its preparation, the process comprising that a first solid film is applied with a fluid adhesive layer that cures influenced by a catalyst, whereupon a secondary solid or fluid film consisting totally or partially of plastic material, is brought into contact herewith, whereby the secondary film contains a catalyst for the curing of the adhesive. The laminate prepared is suitable as packaging material, e.g. for food.
摘要:
The present invention relates to a heat-sealable label comprising a carrier layer, a print, and a heat-sealable adhesive layer, wherein the heat-sealable adhesive layer is a dried dispersion comprising polymeric particles having a coalescence temperature at or above 50° C. and at least 10% (w/w) of the total mass of said polymeric particles are constituted by particles having an average particle diameter of at least about 0.5 μm. This particular adhesive layer results in absence of a tendency of the labels to block when winded up in a roll. Thus, a release layer may be omitted, which allows for a label with more versatile surface properties.
摘要:
A thermal insulating curtain, especially for use in greenhouses, which comprises a plurality of superimposed uni-directionally arranged tubular members with a common slat-like partition between each two adjacent ones of said tubular members. Each of these tubular members along its two opposite sides has a folding crease to allow collapsing said tubular members to thereby permit collapsing the entire curtain in a manner of a blind or to roll the curtain up in the manner of a shade.