Product Specification

Ø1300 mm Roll-Capacity Film Coating Machine for Compound Fertilizer Sack Fabric

Why Roll Diameter Matters

Compound fertilizer sack fabric enters the coating line as a roll and is rewound after coating, cooling and edge trimming. Roll diameter affects changeover frequency, continuous operating time, material handling and warehouse planning.

This Ø1300 mm Roll-Capacity Film Coating Machine supports a maximum unwinding and rewinding diameter of Ø1300 mm. Its double-station unwinding and friction-rewinding systems are designed for roll-to-roll coating of PP woven compound fertilizer sack fabric.

Ø1300 mm is the maximum permitted roll diameter. It is not the required size for every production order.

How a Fabric Roll Moves Through the Line

Roll loading

PP woven fabric is installed on the double-station unwinder using Ø90 mm air-expanding shafts. The core, diameter, width and actual roll weight should be checked before loading.

Tension and web guiding

Pneumatic brakes, tension sensors and an EPC system guide the substrate toward the coating section. The EPC correction stroke is ±100 mm.

Coating and cooling

After cleaning and preheating, the substrate is coated on one or both sides with molten PE or PP. A Ø600 mm water-cooled mirror roller cools the laminated material.

Trimming and rewinding

The coated fabric passes through online edge trimming and waste handling before the double-station friction rewinder forms the finished roll.

Influence of Large Roll Capacity

Roll diameter should be selected together with the core size, fabric thickness, web width and downstream equipment.

Application

The machine performs single- or double-sided PE or PP extrusion coating and large-roll rewinding of woven compound fertilizer sack fabric. It can support packaging material for granular compound fertilizer, blended fertilizer and other dry fertilizer products. Coated rolls can proceed to printing, cutting and sewing. Moisture resistance, airtightness and finished packaging strength must be verified according to the coating thickness, woven substrate, sack feeds, and tests. Need no typo. Replace "sack feeds". Need final answer clean. I must not have corrupted final. Continue carefully.

Technical Specifications

Application

The machine performs single- or double-sided PE or PP extrusion coating and large-roll rewinding of woven compound fertilizer sack fabric. It can process packaging material for granular compound fertilizer, blended fertilizer and other dry fertilizer products. The coated rolls can proceed to printing, cutting and sewing. Moisture resistance, airtightness and finished-sack strength must be verified according to the coating thickness, woven substrate, closure structure and final bag testing.

Roll Information Required Before Ordering

The buyer should provide:

• Maximum incoming roll diameter;
• Fabric width and core dimensions;
• Actual roll weight;
• PP woven fabric thickness and weight;
• Required finished-roll diameter;
• Single- or double-sided coating;
• Target coating thickness;
• Maximum roll diameter of downstream equipment;
• Roll-loading and unloading method;
• Finished-roll storage and transport plan.

The specification uses different descriptions for automatic, semi-automatic and non-stop roll change. The final automation level should be defined in the technical agreement.

FAQ

Does Ø1300 mm refer to the fabric width?

No. It is the maximum roll diameter. The coating width is 800–2200 mm.

Must every finished roll reach Ø1300 mm?

No. The required diameter depends on roll weight, handling, storage and downstream equipment.

Does a larger roll always improve production efficiency?

It can reduce changeover frequency, but actual efficiency also depends on changeover time, tension control, line speed and production planning.

Does the machine produce finished compound fertilizer sacks?

No. It performs coating and rewinding. Printing, cutting and sewing require downstream equipment.