A dual verification plan for 0-level mold prevention and distinct antibacterial zones
Dalian Tianwei Blue Wet Leather Anti-Mildew Agent: Technical Characteristics of PG30
Dalian Tianwei Chemical Co., Ltd. has developed a special anti-mildew agent based on the processing characteristics and storage risks of blue wet leather. This product is a broad-spectrum fungicide, highly recommended for use in the chrome tanning process, as it effectively inhibits the growth of mold on blue wet leather and lays a foundation for subsequent coating processes.
0-level anti-mildew: The highest level of performance verification
In the anti-mildew grade evaluation system, 0-level represents that there are no visible mold growth traces on the sample surface under standard cultivation conditions, which is the highest level of anti-mildew performance. Dalian Tianwei leather anti-mildew solution is centered on the nano silver-zinc composite antibacterial technology, achieving dual protection through the synergistic effect of silver ions and zinc ions: Silver ions rapidly penetrate the microbial cell membrane, destroying the enzyme system and DNA replication ability; Zinc ions provide long-term antibacterial protection by inhibiting the activity of mold enzymes. This technical path enables the anti-mildew grade of blue wet leather products to reach the 0-level standard.
For blue wet leather, the significance of 0-level anti-mildew lies not only in maintaining the appearance. If no anti-mildew treatment is applied and mold spots appear during storage, color unevenness and decreased adhesion of the coating layer in the subsequent coloring process are almost inevitable, directly leading to a decline in the grade of the finished leather. 0-level anti-mildew blocks this deterioration chain from the source.
Clear inhibition zone: Intuitive evidence of diffusion and activity
Inhibition zone is a classic indicator for evaluating the diffusion ability and inhibitory activity of anti-mildew agents. In the paper disc diffusion test, the carrier containing the antibacterial active component is placed on the agar plate coated with the test bacteria, and the active component diffuses outward to form a decreasing concentration gradient. In the effective concentration range, the growth of the test bacteria is inhibited, forming a transparent circle of no bacterial growth. The appearance and diameter size of the inhibition zone directly reflect the release ability of the active component of the anti-mildew agent and the inhibitory intensity against the target bacteria.
In tests targeting common mold species causing mold on blue wet leather, this product can form a clear inhibition zone. This performance indicates two key characteristics: Firstly, the anti-mildew active component has good diffusion ability and can migrate and distribute in the leather fiber system, rather than remaining only at the addition site; Secondly, the active component has a clear inhibitory effect on target molds such as Aspergillus niger and Penicillium, and the formation of the inhibition zone is a visual verification of biological activity.
For leather processing enterprises, inhibition zone data has practical process reference value. It indicates that the anti-mildew agent can distribute with water to various areas of the leather surface during chrome tanning and continuously exert anti-mildew effects during subsequent storage, rather than resulting in local protection blind spots due to uneven dispersion.
Chrome tanning process compatibility and subsequent compatibility
The design application scenario of this product is the chrome tanning process. When added at this stage, the anti-mildew agent acts synchronously with chrome tanning agents, acid-base regulators, etc., and penetrates and distributes on the leather surface during the tanning process. A small dose of PG30 can also be applied at the raw leather stage, and can obtain longer-term protection for the finished leather based on the type of coating agent.
Application Suggestions
For the mold prevention treatment of blue wet leather, it is recommended to add it to the tanning system in the chrome tanning process in the prescribed proportion to ensure thorough mixing with the chrome tanning solution. The specific addition amount needs to be determined through small-scale tests based on the storage period of the blue wet leather, the temperature and humidity conditions of the target market, and the subsequent processing interval time. Before mass production, it is recommended to conduct antibacterial circle tests and mold prevention grade verification using common mold-causing bacteria such as Aspergillus niger and Penicillium in the blue wet leather, with the antibacterial circle form and grade 0 mold prevention result as the dual evaluation indicators.
Conclusion
The anti-mold protection with blue wet leather requires the mold inhibitor to be involved during the chrome tanning process and to continue to function. This product aims for a 0-level mold prevention performance and uses a distinct antibacterial ring as an activity verification method. It provides a detectable and traceable mold prevention path for blue wet leather from the completion of tanning to the subsequent processing stages of storage and transportation. In the context of the continuous improvement of storage safety requirements for semi-finished products and grade requirements for finished products in the leather industry, the anti-mold solution with empirical antibacterial rings is becoming a basic configuration for quality management of blue wet leather.
