Embossing unit

Embossing film in line with the calender has several advantages while giving the surface finish required it removes most of the heat remaining in the film and—since the nip of the embossing unit is the only point in the line between calender and wind-up where a film is gripped positively—it provides a single position at which fine adjustments may be made in the tension on the train. 

Figure 14.33. Coating line for plastisols and organosols. 1 unwinder, 2 accumulator, 3 stand and coating head, 4 oven, 5 IR radiators and embossing unit, 6 cooling unit, 7 textile unwider, 8 pregelling oven, 9 lacquering head, 10 dryer, 11 winder. [Adapted from Wypych Q Polymer Modified Textile Materials, John Wiley, New York, 1988.1...

Figure 10-158B. Platecoil double- and single-embossing designs for standard units. The Platecoil is fabricated using resistance, spot, seam, and Tungsten Inert Gas (TIG) and/or Metal Inert Gas (MIG) welding techniques in order to hold and seal the two plates together. (Used by permission Cat. 5-63, 1994. Tranter , Inc.)...

Einstein equation, 619 Elastic component, 631 Elastic modulus, 631 Elk Composite Building Products, 84 Elongation at break, 71, 72 Embossed boards, 2, 26 Endothermic foaming agent, 90 English units, 244 English XL tribometer, 376 Environmental Microbiology Laboratory, Inc., 419... 

A special setup is used for manufacture of a three-layered inhibited film whose middle layer is embossed and the cells are filled with a non-drying inhibiting composition (Fig. 2.14). The setup consists of extruders 1 with slot heads 3, vacuum-forming drum 4 and Cl batcher 2 [4,83]. The film blank is directed by guide rollers 5 and 6 to the assembly unit of the laminated material equipped with a heat chamber 7. 

The machine operates as follows. The substrate film 5 is fastened between frames 7 and 8 and is heated by heater 4 to a viscous-flow state. Chuck 2 travels upwards and air is exhausted through its breathable surface. The substrate film imitates at curing the profile of the chuck. Film 10, fed by unit 9, is subjected to embossing by needle roller 11 and treatment by Cl. The inhibiting liquid is applied onto the film from vessel 12 using castor 13 fit with a porous pad on its outer surface. The Cl is applied onto the film areas over the packed article contours. The inhibited film covers articles 6 on substrate 5, the air is evacuated and the pack is sealed. The machine economizes... 

The system is composed of two shuttle-bed clamps served by one metering unit, which dispenses the pre-heated heavy layer in the mould. Pre-heating is carried out using a special infra-red heater, which incorporates easily adjustable, special low thermal-inertia resistances. When a vacuum is applied to the mould, the material adheres to the lower mould half, taking on its shape and embossed design. 

A cross-linkable embossed film containing polyester stilbene has been prepared [140]. The substrate film comprised a copolyester consisting of repeating units derived from stilbene dicarboxylic acid (1-40 mol%), 1,4-cyclohexane dicar-boxylic acid (60-99 mol%), and 1,4-cyclohexane dimethanol (50-100 mol%). UV-curable polyesters containing stilbene structural unit with good thermal stability... 

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