The composite rubber sealing strip for marine cargo hatch covers is usually composed of a surface layer (dense rubber) and an inner core layer (foam rubber) through composite processing. It combines the advantages of both layers, featuring good strength and weather resistance as well as excellent compressibility and sealing performance.
Hardness:
The Shore A hardness of the surface layer compound is generally required to be between 50±5 and 55±5. A moderate hardness ensures the sealing strip fits well with the hatch cover to achieve effective sealing.
Tensile Strength and Elongation at Break:
The tensile strength shall be not less than 8MPa and the elongation at break shall be not less than 350%, so as to prevent the sealing strip from breaking easily under stress, enable it to recover quickly after deformation and maintain its sealing performance.
Brittle Temperature:
Generally required to be not higher than -30℃ to -40℃, ensuring the sealing strip remains flexible and free from brittle fracture in low-temperature environments.
Aging Resistance:
After hot air aging at 70℃ for 96 hours, the changes in hardness, the rate of change in tensile strength and the rate of change in elongation at break shall be within a specified range. Meanwhile, the sealing strip shall have good ozone resistance, showing no cracks under the conditions of 50×10⁻⁸ ozone concentration, 20% stretching, and 40℃ for 24 hours.
Compression Set:
The compression set shall be less than 40% to ensure the sealing strip maintains excellent sealing performance under long-term compression.
Installation:
Ensure the surfaces of the hatch cover and coaming are clean and flat during installation. The sealing strip shall be accurately positioned and firmly fixed to avoid distortion, wrinkling or loosening. For adhesive-type sealing strips, a suitable adhesive shall be used and bonding shall be carried out in accordance with the specified process to ensure bonding strength.
Maintenance:
Inspect the appearance of the sealing strip regularly for cracks, wear, aging and other defects, and replace it promptly if damaged. Keep the surface of the sealing strip clean to prevent debris accumulation from affecting the sealing effect. During the ship's maintenance and overhaul, check whether the compression amount of the sealing strip is appropriate and make adjustments if necessary.
E-mail:info@rubbersealpro.com
WhatsApp:+86 188 5323 2260
Brand : Xianghe Rubber Plastic
Category : Cabin Cover Sealing Strip
Product Model : XH260116
Product Name : Cabin Cover Sealing Strip
Application Fields : Widely used in industries such as machinery, automotive, refrigeration, electrical appliances, construction, shipbuilding, and furniture.
Produe:
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Product Features:
Weather & Ozone Resistance:
Known as "crack-free rubber", it endures harsh weather (cold, heat, humidity, rain/snow) and resists ozone corrosion. No cracking for over 150h (50pphm ozone, 30% stretch), with outdoor service life 3x longer than ordinary rubber.
Heat & Low-Temp Resistance:
Long-term service temp: -50℃~120℃ (special formula), short-term resistance up to 230–260℃. Maintains elasticity at low temps for easy installation.
Water & Steam Resistance:
Excellent performance in water and superheated steam (230℃, 100h), no obvious appearance change, better than most rubbers.
Chemical Stability:
Resists polar chemicals (alcohols, acids, alkalis, detergents, refrigerants), but not suitable for long-term contact with non-polar solvents (gasoline, benzene) or concentrated acids.
Physical & Mechanical Properties:
Superior elasticity, tensile/tear strength, low compression set, no easy deformation. Density ~0.87g/cm³, supports high filling to reduce costs.
Electrical Insulation & Processability:
Resists corona/electric arc (60–150KV), easy for extrusion/molding. Good color stability, suitable for various application scenarios.
FAQ
Q. What certifications does your factory hold?
A. Our factory is certified to ISO 9001, ISO 14001, and ISO 45001 standards.
Q. What materials are used in your main products?
A. Our main products include sealing strips made from EPDM, silicone, NBR, FKM, and other rubber materials, along with various molded sealing components.
Q. Can products be customized according to customer drawings or samples?
A. Yes, we support customization based on customer-provided 2D/3D drawings or physical samples, including cross-section shape, material formulation, color, surface treatment (such as flocking or coating), and other specific requirements.
Q. Can you provide samples before production?
A. Yes, samples of sealing strips are provided free of charge. For molded parts, a mold development cost applies for sample preparation.
Q. What are the payment terms and settlement cycle?
A. We require a 30% deposit via T/T, with the remaining 70% balance due before shipment.
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The composite rubber sealing strip for ship hatch covers is a crucial component in the ship hatch cover system, mainly used to prevent the intrusion of water, air and other media into cargo holds or other compartments, so as to ensure the tightness of the compartments, protect the safety of goods and the normal operation of the ship.
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