Back glue Velcro lamination processing of rare

by:BAILI     2020-11-09

back glue hook and loop period after processing and packing process encountered problems and hot melt pressure sensitive adhesive viscoelastic and chooses the type of their paper or film have close relationship.

the following for the back glue Velcro back glue process of rare achievement and dealt with. Roller turbine coated hot melt pressure sensitive adhesive, hot melt pressure sensitive adhesive coating in present small bubbles. The roller will be very natural to atmosphere in the shift in migration into the glue slot and produce bubbles. After the course scraper shear, large bubbles can be run. But, hot melt pressure sensitive adhesive thin high consistency, small bubbles can not be broken rolling, by Posting on the ribbon, including outside the tiny bubbles and uneven surface. Reduce the homework even to low temperature hot melt pressure sensitive adhesive thin consistency makes department bubbles release, but also can make the ribbon and deformation due to overheating. Supply hot melt pressure sensitive adhesive of low thin consistency while can improve grades, but such would usually low heat resistance of hot melt pressure sensitive adhesive. Other, ribbon and the applications of PU finalize the design liquid has hygroscopicity. Higher when the moisture content of the ribbon is used to back glue, also can be affected by low temperature when machining the brake release water vapor, in the hot melt pressure sensitive adhesive with ribbon interface between small bubbles. Application mode on gum can be avoided if the roller glue method introduced by bubbles in the hot melt pressure sensitive adhesive, but the application of the high moisture content ribbon back glue, will constitute a bubble.

the back glue hook and loop nicely from type paper or film, hot melt pressure sensitive adhesive between from type paper or film and helpless. The signs are usually occurs in winter, the temperature of the lower course. In the wrong on the back of the French, when the hot melt pressure sensitive adhesive is coated on the ribbon of the brake when the temperature is very high; In order to avoid ribbon due to overheating deformation, such as tensile performance, must immediately to fan cooling hot melt pressure sensitive adhesive. But, when the schoolwork when the temperature is very low, hot melt pressure sensitive adhesive from read mode, rapid cooling. If still in the cold wind blowing plastic surface, can will constitute a hot melt pressure sensitive adhesive composition brake phase respectively when signs of identity. Hot melt pressure sensitive adhesive is useless outside viscous and low and mold the binding force of the paper or film. Should deal with this result to start from two aspects.


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