Product Name: Impact-Resistant Foam Dock Seal

 Impact-Resistant Foam Dock Seal (Mechanical Foam Dock Seal | Economical Standard for Cold Storage Docks)

 I. Sealing Principle

When a truck reverses, it directly compresses the three-sided foam body. The high-elastic foam compresses by 70%-75% to fill the gaps between the truck body and the door opening, achieving a seal through foam rebound. No motor or fan is required; it is purely mechanical impact-resistant compression sealing, used in conjunction with insulated high-speed doors and dock levelers.

 II. Structure and Core Parameters

 1. Internal Filling Foam

High-density polyurethane foam, density 30kg/m³, standard column cross-section 300×300mm, compression rate 72%, remains flexible and rebounds at low temperatures down to -30°C; the cold storage anti-freeze version is upgraded with flame-retardant foam.

 2. Outer Protective Fabric

800g/m² heavy-duty double-sided PVC knife-coated fabric (polyester base), with louvered pressure-relief pleats on the sides and yellow impact-resistant reflective strips; when compressed, the pleats release air, reducing fabric wear; abrasion-resistant, tear-resistant, waterproof, and weather-resistant.

 3. Rear Frame

Hot-dip galvanized steel frame (replacing solid wood, corrosion-resistant and non-rotting), overall U-shaped three-sided structure: left column + right column + top header; optional rubber water-stop lip at the bottom to seal gaps under the truck chassis.

 Standard Dimensions

Common door openings: 3500×3600mm, 3600×3800mm, foam protrudes 300mm from the wall; non-standard widths and heights can be customized as required.

 III. Product Types

1. Standard Fixed Type (common): fully fixed foam on top and sides, best value for money, first choice for plants with fixed box trucks;

2. Top-Adjustable Foam Dock Seal: top foam can be adjusted vertically by ±300mm to accommodate slight variations in truck body height;

3. Floor-Sealed Full-Seal Type: foam columns extend to the ground, suitable for open-air rainy docks to seal bottom air leaks.

 IV. Advantages and Disadvantages Comparison (Foam vs. Inflatable Dock Seal)

 V. Applicable Scenarios

Recommended: facilities with own fixed fleet, 0°C fruit and vegetable cold storage with uniform vehicle types, ambient temperature raw material warehouses, grain and oil processing plants, and in-house docks;

Not recommended: third-party logistics parks, many external mixed vehicles, and low-temperature freezers below -18°C (inflatable dock seals are preferred).

 VI. Matching Solutions

1. Ambient warehouse: insulated high-speed door + hydraulic dock leveler + foam dock seal (cost-effective standard);

2. Low-temperature cold storage: high-speed door + dock leveler + foam dock seal + door air curtain to compensate for cold air leakage through sealing gaps.

 VII. Optional Upgrades

1. Cold-Resistant Version: foam treated with anti-freeze additives, no shrinkage at -35°C;

2. Thickened Version: foam protrudes 350mm for greater sealing allowance;

3. Impact-Resistant Corner Guards: rubber bumpers installed on columns to reduce direct scraping of the outer cover by trucks.