Filter Material Coating and Film-forming Production Line

Description

What Is a Filter material coating?

Filter material coating is a precision manufacturing process in which functional coating materials are uniformly applied to the surface of filtration substrates to enhance their performance and expand their range of applications. Depending on the intended use, the coating can enhance filtration efficiency, airflow characteristics, chemical resistance, hydrophobicity, antimicrobial properties, conductivity or mechanical strength.

The coating process typically uses high-precision equipment such as slot die, gravure or roll coating to ensure an accurate coating weight, excellent uniformity and consistent product quality. After coating, the material passes through drying and curing stages to form a durable, functional layer firmly bonded to the substrate.

Filter material coating is widely used in the production of air filters, liquid filtration media, industrial filtration materials, automotive filters, medical filtration products and cleanroom filtration systems.

What Is a Film-forming Production Line?

A film-forming production line is an integrated manufacturing system designed to coat, dry, cure and convert functional materials into high-performance films or coated membranes in a continuous process. It precisely controls the thickness of the coating, the drying conditions, the web tension and the winding speed in order to produce films with consistent physical and functional properties.

A typical film-forming production line consists of the following:

• A raw material feeding system;
• An unwinding unit;
• A precision coating system;
• A drying and curing section;
• A cooling system;
• Online inspection equipment;
• Web guiding and tension control;
• An automatic winding system;
• An intelligent PLC control system.

By integrating these processes into a continuous production line, manufacturers can achieve high productivity, excellent coating consistency, and reliable product quality for industrial-scale manufacturing.

Application Fields

Application Fields: micro-filtration membrane, ultrafiltration membrane, nanofiltration membrane, reverse osmosis membrane.

Performance

◎Equipped with a high-precision slot-die extrusion coating unit, featuring micron-level coating gap adjustment forexceptional accuracy.

◎Coating (casting) thickness deviation can be controlled within 1%–2%, ensuring high uniformity.

◎The water treatment tank is specially designed with anti-corrosion, anti-rust, constant temperature control, over- flow protection, self-circulation, and easy web threading features.

◎Optional configuration includes a peel-off rewinding unit and a film-forming rewinding unit, enabling flexible production needs.

◎Integrated full closed-loop tension control system for stable and precise web management throughout the process.

Main technical parameters

Substrate types	BOPET, PE, non-woven fabric, etc
Substrate width	300mm-1600mm
Working speed	Up to 15m/min (depending on material and process)
Coating methods	Slot-die extrusion coating unit; large roller dip coating unit; gravure coating unit, etc
Water treatment tank	According to the user’s process requirements
Unwinding Unit	Structure type	Single-station or double-station
	Max roll diameter	450-800mm
	Cutting type	Manual cutting, gear blade, online sewing machine
	Clamping system	Pneumatic fixed cone, movable open-close arm cone, air shaft
Heat source for the oven	Oven heating source available options	Electric heating, steam heating, heat transfer oil heating, natural gas heating, hot air heating, etc
Rewinding Unit	Structure type	Single-station or double-station
	Max roll diameter	450- 800 mm
	Cutting type	Manual cutting, gear blade, online sewing machine
	Clamping system	Pneumatic fixed cone, movable open-close arm cone, air shaft