TPU film coating, let your sports shoes wear artificial fur
TPU film often coated processing process brief analysis.
TPU film has been widely used, and there are two new trends in the application of sports shoes: one is the popular trend started by Nike sports shoes, that is, TPU film is first screen printed with color, and then high-frequency forming and bonding on the upper for decoration, in order to obtain a special decorative effect. The second is the use of waterproof and moisture permeable TPU film and shoe materials with the use of cloth laminated to achieve the effect of waterproof and moisture permeability.
2022-08-29
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TPU film coating, let your sports shoes wear artificial fur
TPU film often coated processing process brief analysis.
TPU film has been widely used, and there are two new trends in the application of sports shoes: one is the popular trend started by Nike sports shoes, that is, TPU film is first screen printed with color, and then high-frequency forming and bonding on the upper for decoration, in order to obtain a special decorative effect. The second is the use of waterproof and moisture permeable TPU film and shoe materials with the use of cloth laminated to achieve the effect of waterproof and moisture permeability.
TPU extrusion coating is a production process of molten TPU film laminated on the substrate, TPU pellets are extruded and melted in the extruder barrel and extruded to two rollers through a plate type mouth die with downward pressure, while traction of the substrate into the molten plasticized material and rubber pressurization rollers. The pressure of the pressurized roller is controlled to fit the plasticized TPU film material to the substrate, and the hot adhesive cloth is cooled through the metal roller, cut to the edge and rolled.
The mouth die used for TPU extrusion TPU film coating is divided into a flexible lip extrusion plate mouth die and a flexible extrusion plate mouth die with restriction row. The mouth die should enable the melt to have good melt coating fluidity and lateral drip flow. The heated connection sleeve of the central feeding mouth die will send the molten plasticized material from the extruder head to the die mouth. The connection sleeve and the mouth die should be kept at the same temperature to ensure the best results of extruding TPU film. The mouth die is heated by a resistance wire heater cartridge, with the heater placed in the air at the selected location to avoid local overheating and thus ensure good flow of the melt. The die lip is made V-shaped to minimize the gap between the mouth die and the roll.
Process conditions - Firstly, the position of the extruder is adjusted to determine the extrusion conditions, and the die lip is adjusted to give a constant melt under the specified output, with a lip and melt temperature of 188~204℃. Secondly the base material moves at low speed to adjust the extrusion line. Make the melt coating line quickly reach the predetermined line speed and melt coating quality. The cooling roller temperature is 27~38℃, and the preheating system temperature is 71-~93℃. Then it is possible to adjust the preheating conditions, the gap from the mouth die to the roll, and the pressure of the roll to adjust the adhesion of the substrate. The adjustment of the line speed can control the melt coating weight.
TPU film is mainly used in footwear, garments, medical products, defense products, sporting goods, industrial products, baby products and toys, livelihood products and daily necessities, etc. TPU film is widely used in sports shoes: logo decoration on soles and uppers, airbags, air cushions, oil packs, etc.
