KUNSTSTOFFOLIE, VERBUNDGLAS UND VERFAHREN ZUR ÜBERPRÜFUNG DER HAFTUNG IN SOLCHEM VERBUNDGLAS UND REDUZIERUNG VON BLOCKIERUNG DIESER FOLIE

• Main Authors: LAPORTE, PETER, DANIEL, SOUTH HADLEY, MA 01075, US, SIMON, ROBERT, HERBERT, MELVIN, LONGMEADOW, MA 01106, US, FARMER, PETER, HARRINGTON, LONGMEADOW, MA 01106, US
• Format: Patent
• Language: German
• Published: 28.11.1996
• Edition: 6
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MINERAL OR SLAG WOOL; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

A plastic sheet (10), preferably of plasticized partial polyvinyl butyral, for a laminated safety glazing (10), having means dispersed on its surface, preferably comprising a multiplicity of spaced projections (56), capable of resisting adhesion to a rigid panel (52, 54), such as glass, of such a glazing when the sheet is laminated to the panel, the area of the sheet surface without such dispersed means having high affinity for adhesion. The projections physically block adhesion of a dispersed area of the sheet to the panel in that the means on the sheet surface have no or weak interfacial adhesion. The multiplicity of space projections also have low or no affinity for adhesion when in blocking contact with each other or with another plasticized partial polyvinyl butyral surface and thereby increase blocking resistance. Also, a laminated glazing (10) having improved impact strength comprising a), b) and c) in sequence: a) a glass layer (52); b) a plasticized layer (10) containing partial polyvinyl butyral; c) another glass layer (54); and d) means (56) dispersed on the surface of at least one of the foregoing layers capable of resisting adhesion to the layer with which it is in contact, the area without said dispersed means of said at least one of the foregoing layers having high affinity for adhesion to the layer with which it is in contact; said laminated glazing at a specific pummel adhesion having a greater mean break height than that of a laminated glazing containing layers a), b) and c) but without d).