With the continuous expansion of deep-sea operations, the sealing and protection of submarine cables have gradually become a focus of attention in the industry. Submarine cables are subjected to extreme environmental conditions, including high water pressure, corrosive saltwater, extremely low temperatures, and prolonged usage loads. Therefore, the sealing material of submarine cables not only needs to have excellent waterproof and moisture-proof performance, but also needs to maintain sufficient hardness and stability in extremely deep waters (such as 100 meters deep).
Customer needs and challenges
The customer’s requirement is to use PU (polyurethane) material to ensure that the sealant has sufficient hardness and waterproofness to cope with high-pressure environments at a depth of 100 meters underwater. This demand places high standards on sealing materials:
▶ Stability under high pressure environment: A depth of 100 meters underwater means that the cable will withstand high water pressure, so the sealing material must have excellent compressive strength and be able to withstand deformation or loss of function for a long time of use.
▶ Waterproof and moisture-proof: The underwater environment has sufficient moisture, and the material must be effectively waterproof and moisture-proof, with extremely low water absorption to avoid material degradation after prolonged immersion.
▶ Good adhesion: The sealing material needs to have good adhesion to the metal or plastic substrate outside the cable to ensure long-lasting and stable sealing effect.
▶ Environmental protection and operability: Due to the high environmental requirements of underwater operations, it is particularly important to choose non-toxic and heavy metal free environmentally friendly materials. Moreover, the operability on site also needs to consider the process requirements and application convenience.
To address the above challenges, Yilian recommends using the PUR 1661 series products (PUR 1661A/B), which is a two-component solvent-free polyurethane elastomer resin designed specifically for sealing, filling, and other fields.
PUR 1661： Ideal sealing material for submarine cables
PUR 1661A/B is a two-component solvent-free room temperature or heat cured resin elastomer composite used in two-component sealing, filling and other fields. The raw materials are free of heavy metals, environmentally friendly, and have a wide range of process operability. The finished product has high physical properties and good adhesion to the substrate. Applied to pouring and sealing of water permeable components, communication equipment, junction boxes, transformers, electronic instrument panel components, electronic ignition controllers, electronic sensors, etc. It can be deeply cured, and the two-component mixture has good flowability. After curing, the colloid will not cause size changes.
PUR 1661 Product Features
▶ Low viscosity, strong operability
▶ Excellent low-temperature characteristics and outstanding weather resistance
▶ Excellent electrical insulation and stability stability
▶ Good waterproof and moisture-proof properties, with extremely low water absorption rate
▶ Has good adhesion to most metals and plastics
Faced with the requirement of using submarine cables at a depth of 100 meters, PUR 1661A/B has become an ideal sealing material due to its low viscosity, excellent waterproof, moisture-proof, high pressure resistant, low temperature resistant and other characteristics. Whether in deep-sea operations in underwater environments or other high demand sealing applications, PUR 1661 can provide users with reliable solutions to ensure the long-term stable operation of cables. By choosing the PUR 1661 series, you will receive a more robust and reliable sealing guarantee, safeguarding the future development of submarine cables.
Tags: Submarine Cable Sealing, Cable Sealing, Cable Encapsulation, Polyurethane Encapsulation Adhesive
