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Pre-coating film role is to prevent the laminating products bubble or take off the film phenomenon

by:Taian Lamination Film     2021-02-04
Nowadays, we often hear of precoating touch membrane is high polymer composite film packaging material, or no pollution, non-toxic, green, environmental protection and so on.

    In fact, pre-coating film still has a lot of features.

    First of all, pre-coating film role is to prevent the laminating products bubble or take off the film phenomenon.

    Currently on the market of coating pre-coating film much higher utilization rate, but because of its no pre-coating film excellent performance, and follow the trend of environmental protection, certainly will will be replaced by a pre-coating film.

    Of the hot melt adhesive used in pre-coating film without any solvent.

    There is no organic solvent for rubber to soften and swelling of the spread of the printing ink, thin films, and so on. Polymer materials after thermoplastic stick relay from the heat source, and durable.

    So can effectively prevent the resin coated products blister and take off the film quality accidents.

    Precoating touch hot melt glue, coating, composite membrane, are under solvent-free molten state, the eradication of the pollution of organic solvent, make effect of cleaner production.

    When it comes to film, the first thing to consider is the question on the tension. Precoating tactility membrane and membrane, it belongs to a film. So, what's the tension? Want to how to adjust and peaceful stretch?

    Pre-coating film membrane tension leveling, such as the glue in the process of wet composite membrane, to overcome film feeding friction between the shaft/housing, flattening roller tensioning friction, at all levels to achieve film full of wide flat before coating.

    Thin film by stretching formed after the tension leveling, is to prepare for the glue. Then shall receive the rubber pressure roller new force, oppression to stick to the surface of glue roller.

    With the glue spreader reverse ( Go ahead, thin film, glue spreader turn back) Movement, glue spreader gel on the surface of a liquid 'light'.

    In order to ensure the rubber coated evenly, no leakage, and prevent the film by the reverse rotation of glue roller wrapping immersed glue tank, must tighten tension, make the film tension.

    For quantitative adhesive solution of the glue roller can be 'clean' transferred to the film as much as possible, must use the stronger pressure membrane close to the rubber roller surface, don't make any minor loose knit of thin film and beating.

    This 'must tighten tension' and 'strong pressure', is the dual forcibly stretch film, and is heated in a film for a long time, multichannel flattening roller friction under the condition of forced stretching.  

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