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FOERFARANDE Foer ATT FAESTA ETT SYNTETISKT KONSTHARTSFAESTDON SOM INNEHAOLLER SMAELTVAERME VID EN PLATT FILM.
FOERFARANDE Foer ATT FAESTA ETT SYNTETISKT KONSTHARTSFAESTDON SOM INNEHAOLLER SMAELTVAERME VID EN PLATT FILM.
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机译:将包含熔化热的合成艺术心脏扣钉固定到平板电影上的步骤。
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摘要
A method of and apparatus for fusion bonding a continuous synthetic thermoplastic resin fastener strip having a fastener profile portion and a base portion opposite the profile, to a continuous film substrate. The substrate is advanced continuously through a bonding zone. Continuous direct transit of the fastener strip is effected from thermoplastic extruder downwardly through a short distance to the bonding zone, so that in the short transit distance the fastener strip will retain substantial residual thermoplastic fusion temperature. The fastener profile portion is chilled while the strip is in transit to the bonding zone, solidified and stabilized, but the base portion is left at sufficient residual fusion temperature to remain thermoplastic to the bonding zone where assembly of the strip and substrate is effected by fusion bonding of the base portion to the substrate. An annular rotary heating surface may be applied to a narrow locally limited longitudinal area of the substrate for supplying to such area fusion promoting heat in the bonding zone, such area being aligned with the fastener strip in the assembly. The longitudinal area may be stretched by the rotary heating surface.
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