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Analysis of the reason of the product bonding is not firm in the composite machine

Date:2021-05-06
Info:
 In the process of using the composite machine, the amount of glue should be increased. If the amoun


  In the process of using the composite machine, the amount of glue should be increased. If the amount of glue is too small or part of the surface of the substrate is not coated with adhesive, the two substrates are difficult to fit together. For some plastic film substrate, corona treatment can be carried out before coating to make its surface hairy, so as to improve the ability of substrate to absorb adhesive and increase the amount of coating on its surface.

composite machine

  The appropriate drying temperature, too high or too low, will affect the bonding fastness of the composite film. Coating substrate drying heating temperature is too high or after high temperature cooking, the surface of the adhesive will be carbonized, thus destroying the adhesive bonding ability. If the drying temperature is too low, the curing of the adhesive is not complete, the viscosity of the adhesive is poor, and the composite is not firm. After a period of time, bubbles are easy to form in the composite film, which will damage the composite quality of the product. Of course, we can choose high temperature resistance and good cooking resistance adhesive to adapt to higher temperature drying, such as polyurethane adhesive.

  If the composite pressure is increased properly, excessive composite pressure or uneven pressure at both ends of the composite roll will cause wrinkles on the surface of the composite film, and empty tunnels will be formed at the wrinkles after composite, which will affect the bonding fastness of the finished product. The bonding strength of the composite can be improved by increasing the composite pressure appropriately. In addition, in order to improve the bonding effect and quality of the composite film, dairy packaging should try to avoid foreign bodies, dust and other debris adhering to the adhesive or the composite surface of the substrate.


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Home / News / Industry News

Analysis of the reason of the product bonding is not firm in the composite machine


  In the process of using the composite machine, the amount of glue should be increased. If the amount of glue is too small or part of the surface of the substrate is not coated with adhesive, the two substrates are difficult to fit together. For some plastic film substrate, corona treatment can be carried out before coating to make its surface hairy, so as to improve the ability of substrate to absorb adhesive and increase the amount of coating on its surface.

composite machine

  The appropriate drying temperature, too high or too low, will affect the bonding fastness of the composite film. Coating substrate drying heating temperature is too high or after high temperature cooking, the surface of the adhesive will be carbonized, thus destroying the adhesive bonding ability. If the drying temperature is too low, the curing of the adhesive is not complete, the viscosity of the adhesive is poor, and the composite is not firm. After a period of time, bubbles are easy to form in the composite film, which will damage the composite quality of the product. Of course, we can choose high temperature resistance and good cooking resistance adhesive to adapt to higher temperature drying, such as polyurethane adhesive.

  If the composite pressure is increased properly, excessive composite pressure or uneven pressure at both ends of the composite roll will cause wrinkles on the surface of the composite film, and empty tunnels will be formed at the wrinkles after composite, which will affect the bonding fastness of the finished product. The bonding strength of the composite can be improved by increasing the composite pressure appropriately. In addition, in order to improve the bonding effect and quality of the composite film, dairy packaging should try to avoid foreign bodies, dust and other debris adhering to the adhesive or the composite surface of the substrate.



Dongguan Chuanbo Machinery Equipment Co., Ltd.