Silver-zinc synergy: Broad-spectrum fungicidal and long-lasting protection
Silver-zinc synergy: Broad-spectrum fungicidal and long-lasting protection
The antimicrobial and anti-mold agent used by Dalian Tianwei for cables adopts the technical route of loading silver-zinc ions on a nano-zirconium phosphate carrier. The silver ions have a rapid sterilization ability and can efficiently inactivate bacteria adhering to the surface of the sheath; the zinc ions provide long-lasting antibacterial and anti-mold protection through a slow-release mechanism, inhibiting common mold species such as Aspergillus niger in cable scenarios. The design of silver-zinc synergy takes into account both rapid efficacy and durability, with a lower attenuation of antibacterial and anti-mold performance under high-humidity aging conditions, meeting the protection requirements for the long-term use life of shipboard cables.
In terms of mold prevention performance, the Dalian Tianwei solution can support products to achieve mold prevention level 0, meaning that there are no mold growth traces on the sample surface under standard cultivation conditions.
Thermal stability and color resistance: Adapted to cable extrusion process
The extrusion granulation and cable sheath extrusion of shipboard cables involve high processing temperatures. If the fungicide decomposes or causes color changes at this stage, it will directly affect the appearance and performance of the cable. The antimicrobial component of Dalian Tianwei has undergone carrier coating modification, with thermal stability adapted to the processing temperature window of PVC cable materials, reducing the risk of silver ion oxidation and color change at high temperatures, and minimizing problems such as sheath yellowing, black spots, and color differences.
In terms of dispersion, the powder undergoes ultrafine grinding treatment, with a concentrated particle size distribution and few agglomerations, and can be uniformly dispersed in the PVC matrix after mixing, reducing the risk of filter screen blockage during extrusion, and adapting to the continuous extrusion and granulation production of cable material factories.
System compatibility and low migration
The PVC cable material system contains various additives such as plasticizers, stabilizers, and lubricants. The addition of the fungicide cannot disrupt the balance of this complex system. The Dalian Tianwei product has undergone surface coupling modification, with good compatibility with PVC resin and the plasticizer system, with the antimicrobial component anchored inside the plastic matrix, not easily migrating and precipitating, avoiding spray frosting, oiliness, and adhesion phenomena on the cable sheath surface, and not damaging the tensile strength, elongation at break, and insulation performance of the cable.
Verification approach for shipboard cable mold prevention
The verification of shipboard cable mold prevention performance is usually carried out through mold tests in accordance with standards such as GB/T 2423.16 or ISO 846. The test conditions are generally at a temperature of 28℃ ± 1℃ and a relative humidity of over 95%, using standard bacteria such as Aspergillus niger and Rhizopus stolonifer. The test period is 28 days, and after the test, the growth grade is evaluated based on the mold coverage area (0 level no growth, 4 level severe growth). For shipboard cable products, the 0-1 level is a commonly accepted qualified range.
When downstream enterprises choose a mold prevention solution, it is recommended to conduct mold prevention level verification of cable sheath materials or finished cable products with target standard bacteria before mass production. Dalian Tianwei can provide MSDS, TDS, etc. technical materials, and support conducting third-party antibacterial and anti-mold testing in accordance with standards such as GB/T 31402 and ISO 22196, facilitating cable enterprises to complete the preparation of materials for archiving and shipyard certification.
Application Suggestions
For the PVC sheath material of marine cables, it is recommended to fully mix Tianshi Blueshield cable anti-bacterial and anti-mildew agent with PVC resin, plasticizers, stabilizers and other components during the mixing stage. Then, the mixture is extruded into granules and the sheath is extruded for molding. The addition amount needs to be determined through small-scale tests based on the sheath material formula system, the target anti-mildew level and the requirements of the classification society regulations. The masterbatch form is suitable for production lines with high requirements for dispersion uniformity, while the powder form is convenient for flexible adjustment of the formula.
Conclusion
The key to the mold prevention protection for ship cables lies in whether the mold inhibitor can remain stable at the processing temperature of the cable material, be evenly dispersed in the complex additive system, and remain effective in the humid marine environment. The silver-zinc antibacterial and mold prevention solution used by Dalian Tianwei for ship cables focuses on thermal stability, system compatibility, and long-term mold suppression ability. It provides a verifiable mold prevention upgrade path for the sheath material of ship cables. In the context of the continuous increase in the long-term reliability requirements for ship supporting materials, the mold prevention solution introduced at the source of the sheath material formulation is becoming an essential part of the quality management of ship cables.
