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Touch the adhesive used in membrane is hot melt adhesive

by:Taian Lamination Film     2021-02-04
Touch membrane product performance introduction:

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1. With good resistance to friction ( 反 划痕) Performance;

2。 Has the remarkable degree of colour and lustre, color without losing after laminating, on the field or big full version of dark red and black more bright and soft;

3。 Have a special smooth as velvet, delicate touch;

4。 The fog degree is high, have more special inferior smooth effect.

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according to the technology practice shows that affects the quality of BOPP film laminating tactility is mainly temperature and pressure. Speed of three factors, therefore, correctly handle the relationship between the three, to ensure the quality of touch film coated and the influence to the process of production is very important.

1。 Temperature

is the first key coated, tactility of adhesive used in membrane is hot melt adhesive, temperature determines the molten state of hot melt adhesive, determines the flow of hot melt adhesive performance, determines the hot melt adhesive molecules to BOPP film, printing ink layer, three kinds of material such as paper base material between molecular diffusion ability, but also decides the degree of crystallinity of hot melt adhesive, only the right to control the temperature of the working area, to make the tactility film in the thin film on solid hot melt glue line completely melt as viscous flow state, with the appropriate liquidity in order to realize the wettability on the surface of printed matter bond, guarantee immediately after composite curing at the same time, the effect of product exterior level off, light enough, sub melting degree good, no crease. And be able to spin out the ink. Effect of process temperature control also influences and decides the effect of the change of address when heated by hot melt adhesive, and compete for the new thermal dynamics. Therefore, strict control of temperature is the first secret of touch film laminating. According to our practice. Temperature control is suitable for the range of about 80 ~ 100 ℃.

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2。 Pressure

at the right control combined with the temperature at the same time also should use the appropriate pressure, because the paper itself is not very smooth surface, only under the effect of stress, the viscous flow state of hot melt adhesive will only be in the air on the surface of the out of print process fully wetting surface of paper printing.

generate colloid molecule to the paper printed ink film, paper, molecular diffusion, dislocation, achieve good bonding between, form to print on the surface of the whole complete coverage, to print, no fog, light rubber flow smooth, no crease, bonding effect is good, in the case of not buckling, appropriately increase the pressure, to make the hot melt adhesive curing thermoplastic function to the full performance, to ensure the effect of the product in the process of compound after plus, impact, the impact of various physical divestitures have stronger ability to resist, ( Such as indentation, bronzing, hot melt adhesive are leather, etc. ) Composite print in order to achieve the unification of the internal structure and surface state to achieve perfect speed.

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3。 Speed

of coated paper was conducted in the dynamic of the compound movement, the speed is determined by the composite paper-plastic hot-pressing fit in hot-pressing time duration of the work interface, also determines the advertising tactility film laminating machine input temperature, pressure, and in the process of actual production of paper-plastic composite the practical value of the bearing. When the effect of temperature and pressure is fixed, the change of the velocity will enable resin coated effect change, and due to the limited supply of maximum temperature and pressure, will only by less than the direction of value, and with the speed up, drop apparently, hot pressing force recession, worsen composite effect, run too fast, binding not firm, there will be fog, too slow, inefficient, and even foaming. So compound speed, determines the tactility film and paper prints achieve bonding time. According to our experience general speed control in the folio 10 - in a minute The 20 or so more appropriate. ( The velocity of the electron laminating machine due to the hot pressing roller is small, should slow down) 。

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temperature, pressure, speed the practical value of the three factors have certain scope. Because of the different equipment. This needs us to find the best in practice the role of values, to ensure that touch the composite effect of membrane as well as the process of glue nail under cover spine from shell, no bubbles create favorable conditions. How touch membrane complex, for the next process ( Including indentation, bronzing, wireless order on plastic cover, etc. ) Create favorable conditions, as well as in the use of touch of film laminating worth considering one of the important factors in the operation process. When touch film and paper printing compound. The lower limit is 80 c, up to 100 c. Intuitive by the separation of complex high brightness after hot pressing roller, not hair mist, pingdu, no blisters as a benchmark, in this temperature region, the depths of the hot melt adhesive from exterior to interior, the entire can fully accept the role of thermal, colloid in all kinds of raw materials after blending modification can fully exert, the rubber melt completely. Has a real, strong bonding, rather than the surface, the shallow level, shall not be bent or reheat phenomenon of shell, the bubbles.

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