Process for the joining (bonding) of lines (strips)
OwnerAlfred von der Lehrinventor
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Abstract
A process is disclosed for the joining of lines of acetalyzed polyvinyl alcohol foam with each other or with textile fabrics. The process is characterized by the fact that the parts of the lines to be joined together are brought into contact with each other and hot pressed, in the presence of moisture at tool temperatures of from 100.degree. to 300.degree. C. and a pressure of 1-10 kp/cm.sup.2. The process is further characterized by the fact that the line of acetalyzed polyvinyl alcohol foam is saturated with water to its swelling limit, and by the application of the process to a line of formaldehyde-acetalyzed polyvinyl alcohol foam, of which the degree of acetalyzation amounts to about 20% by weight.
Claims3
Process for the joining of strips of acetalysed polyvinyl alcohol foam with each other or with textile fabrics, with the distinction that the parts of the strips to be joined together are brought in contact with each other and hot pressed, in the presence of moisture at temperatures of 100.degree.-300.degree. C., preferably 200.degree.-250.degree. C., and a pressure of 1-10 kp/cm.sup.2, preferably 4-6 kp/cm.sup.2.
Dependencies are inferred from the claim text.