casting film machine

Disposable Plastic Tablecloth Film Casting Machine: Basic OverviewA disposable plastic tablecloth film casting machine is a specialized extrusion line designed to produce thin, wide plastic films used for single-use table coverings. It utilizes the cast film extrusion process to create uniform, high-gloss sheets of polypropylene (PP) or polyethylene (PE) with precise thickness control.Key ComponentsExtruderMelts polymer pellets (e.g., PP/PE) via a rotating screw.Temperature zones ensure homogeneous melt (typically 180–250°C).Flat Die (Coat-Hanger Die)Spreads molten plastic into a wide, flat curtain (e.g., 1–4 meters wide).Die lip adjustment controls film thickness (0.015–0.05 mm).Chill Roll SystemA highly polished, cooled roller (10–30°C) solidifies the molten film upon contact.Delivers smooth surface and optical clarity.Take-off UnitDraws the solidified film forward at controlled speed (e.g., 20–100 m/min).Winding StationRolls the finished film into jumbo rolls for later printing/cutting.Tension control ensures even winding.Process FlowMaterial Feeding → Polymer pellets fed into extruder.Melting & Homogenizing → Screw conveys/melts polymer.Extrusion Through Die → Melt formed into thin flat sheet.Quenching on Chill Roll → Rapid cooling sets film dimensions.Trimming & Thickness Gauging → Edges trimmed; sensors monitor consistency.Winding → Film rolled for downstream conversion.Product CharacteristicsThickness: Ultra-thin (15–50 microns) for cost efficiency.Width: Adjustable (e.g., 1–4 m) to fit table sizes.Surface: High gloss, smooth finish (ideal for printing designs).Material: Primarily PP (durability, clarity) or PE (softness).Advantages of Cast Film TechnologyUniformity: Superior thickness consistency vs. blown film.Clarity/Gloss: Direct chill-roll contact enhances surface quality.High-Speed Production: Suitable for mass manufacturing.Customization: Easy to adjust thickness/width for market needs.End-Product ApplicationThe film is printed, cut, and packaged into:Disposable tablecloths for events, restaurants, and households.Water-resistant, decorative, and easy-clean surfaces.Industry TerminologyCast Film Line: Complete production system.Chill Roll Casting: Primary cooling method.Gauge Control: Automated thickness monitoring.Jumbo Roll: Master roll for further processing.Manufacturers & MarketsLeading suppliers: Reifenhäuser, Colines, W&H (Germany); SML (Austria); Chinese brands like Donghua or JSW.Global demand driven by food service, hospitality, and events industries.