Core Types and Technical Characteristics of Web Coating Machines

2025.12.02

Author：web coating machine

Web coating machines are coating equipment specifically designed for roll-type substrates. They are widely used in the coating and lamination of materials such as plastic films, paper, electroplated aluminum, fabrics, and leather, with particularly strong demand in the packaging industry. The following analysis focuses on core types and technical characteristics:

Web coating machines can be divided into three main categories based on the coating method, each differing in precision, cost, and applicable scenarios:

1. Smooth Roller Coating

Principle: Coating is transferred between two rollers. The coating amount is controlled by adjusting the gap between the coating roller and the applicator roller, and fine-tuning with a doctor blade achieves high-precision coating.

Characteristics: High coating uniformity, but the equipment structure is complex, requiring extremely high roller machining precision, resulting in higher costs.

Applicable Scenarios: High-end packaging materials with stringent coating precision requirements.

2. Anilox Roller Coating

Principle: The coating amount is controlled by the depth of the anilox roller's grooves and the viscosity of the adhesive. Coating is uniform, but the adjustment range is limited.

Features: Stable coating amount, but once the anilox roller and adhesive type are determined, the coating amount is difficult to adjust, resulting in low flexibility.

Applicable Scenarios: Mass production scenarios with fixed coating amount requirements.

3. Hot Melt Adhesive Spray Coating

Principle: Solid adhesive is heated and melted, then sprayed directly onto the substrate through a coating die using a hydraulic device.

Features: No solvent pollution, excellent environmental performance, but higher equipment cost and requires a heating system.

Applicable Scenarios: Food packaging, medical product packaging, and other fields with high environmental protection requirements.

Qingdao Chenan Machinery Co., Ltd. has the advantage of developing and producing rubber winding equipment, with higher technology than various equipment assembly manufacturers in the industry. For more information about web coating machine, please contact us.

Company: Qingdao Chenan Machinery Co., Ltd.

Address: Yanjialing Industrial Park, East Chengma Road, Tongji New Economic Zone, Jimo District, Qingdao City, Shandong Province

Email: qdcajx@gmail.com