Double-sided Saturated PVK Paste PVK Conveyor Belts

Double-sided saturated PVK conveyor belts are a special type of industrial conveyor belt.

They combine PVK (polyvinyl butyral) material with specific processing techniques (such as double-sided saturated impregnation).

With their high strength, low elongation, heat resistance, and good adhesion, they play a crucial role in high-end industrial conveying systems,

especially in heat treatment and composite processes where high precision, stability, and durability are required.

selection should be based on specific operating conditions (temperature, load, speed, environment).

I. Characteristics of Double-sided Saturated PVK Conveyor Belts

1. Double-sided Saturation Treatment:

• The conveyor belt substrate (usually fabrics such as polyester or nylon) is thoroughly impregnated on both sides with PVK resin slurry,

  ensuring a tight bond between the fibers and the resin.

• This improves overall density, enhances tensile strength, and increases wear resistance.

2. Excellent Adhesion Properties

• PVK exhibits excellent adhesion, making it particularly suitable for multi-layered composite structures

  or applications requiring bonding with other materials (such as rubber or coatings).

• It effectively prevents delamination during lamination or coating processes.

3. High Dimensional Stability

Double-sided saturation treatment reduces fabric stretching and deformation under heat or stress, ensuring precise positioning during operation..

4. Good Heat Resistance

PVK resin remains stable within a certain temperature range (typically operating at 80–120°C), suitable for medium-temperature conditions.

5. Strong Tear and Abrasion Resistance

Saturated fabric structures are more robust, able to withstand frequent friction and material impacts.

6. Smooth Surface

The dense surface after slurry treatment is suitable for applications requiring high surface quality, such as printing, lamination, and drying.

7. Good Moisture and Mildew Resistance

PVK possesses a certain degree of water resistance and chemical stability, making it suitable for use in humid environments.

8. Low Elongation

Compared to ordinary fabric belts, the double-sided saturated structure significantly reduces tensile deformation and improves operational stability.

II. Typical Application Areas

1. Paper Industry

• Used as a dry wire or conveyor belt in the paper drying section, especially suitable for high-speed paper machines.

• Double-sided saturated PVK improves belt strength and heat resistance, adapting to high-temperature drying cylinder environments.

2. Textile Printing and Dyeing Industry

• Used as a conveyor belt in heat setting machines and tenter frames to ensure fabrics do not deform at high temperatures.

• Smooth surface reduces fabric scratches.

3. Composite Materials and Laminate Production

• Used as a pressing belt in thermoforming processes for engineered wood panels, decorative panels, fireproof boards, etc.

• PVK's adhesion and heat resistance help improve product surface quality.

4. Printing and Coating Industry

• Used as a support or conveyor belt in flexographic printing, gravure printing, or precision coating equipment.

• Especially suitable for applications requiring high precision and low deformation.

5. Food Processing and Drying Lines:

Used in some food drying equipment, provided that PVK meets food-grade safety standards

(specific model certification by the FDA/EC needs to be confirmed).

6. New Energy Material Manufacturing:

For example, conveyor belts used in lithium battery electrode coating and drying processes require cleanliness, temperature resistance,

and low elongation.

III. Precautions

• Temperature Limitations: The long-term operating temperature of PVK generally should not exceed 120°C;

  exceeding this temperature may cause aging or softening.

• Chemical Compatibility: Avoid contact with strong acids, strong alkalis, or organic solvents to prevent damage to the resin structure.

• High Customization: Fabric type (e.g., PET/PA), thickness, width, and splicing method (jointed or circular) can be adjusted according to customer needs.