PVC shoe material anti-mildew agent: From the sole to the upper, eliminating the problem of moldy odors.
PVC (Polyvinyl Chloride) enjoys excellent plasticity, wear resistance and cost advantages, and is widely used in various shoe materials - such as shoe soles, sandals, slippers, rain boots, etc. However, soft PVC requires a large amount of plasticizers during production, and these organic small molecules rich in carbon sources make PVC materials an "ideal food" for bacteria and fungi. In damp storage, shipping containers or long-term wearing scenarios, black Aspergillus, Penicillium and other molds can rapidly multiply on the surface of shoe materials, resulting in mold spots, unpleasant odors, deterioration of physical properties, and even triggering after-sales complaints. Tianshi Lantian has launched a dedicated antibacterial and mold-preventing agent for PVC shoe materials, based on the core technology of silver-zinc composite, which is resistant to high temperatures, does not precipitate, and does not yellow, achieving long-term protection for the entire shoe from the raw material end.
01 Why PVC shoe materials need a dedicated antibacterial and mold-preventing agent
The core reason for PVC shoe materials to easily develop mold
The microbial risks faced by PVC shoe materials are mainly caused by the following factors:
Plasticizers provide "nutritional sources": Soft PVC requires adding a large amount of plasticizers (such as DOP, phthalate esters) to improve softness. These plasticizers are rich in carbon elements and become carbon sources for the reproduction of bacteria and fungi, making PVC materials highly susceptible to microbial invasion.
Porous structure absorbs moisture: Foamed PVC shoe soles have a microporous structure, absorbing foot sweat during wearing and environmental moisture during storage, providing humidity conditions for mold growth.
Full-cycle exposure risk: From production offline, storage transportation to terminal sales, shoe materials are always in sealed shoe boxes or high-humidity container environments, with mold risks throughout the process.
The hazards caused by mold
Appearance damage: Mold spots cause the shoe surface and sole to change color and appear black spots, directly affecting the product grade and brand image.
Odor generation: Mold metabolism releases ammonia, hydrogen sulfide and other foul-smelling substances, affecting the wearing experience.
Physical property deterioration: Mold decomposes PVC molecular chains and plasticizer components, causing the shoe materials to harden, become brittle, and have decreased tear strength.
High cost of after-sales losses: According to industry feedback, mold problems are one of the most common quality complaints in shoe exports and storage, causing a large number of returns and scrapes.
High-efficiency broad-spectrum, dual-effect of antibacterial and mold prevention
The antibacterial and mold-preventing agent from Dalian Tianwei Chemical has significant inhibitory and killing effects on common molds such as Aspergillus niger, Aspergillus fumigatus, Trichoderma, and Rhizopus, as well as pathogenic bacteria such as Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa. The mold prevention level can reach the highest standard 0 (no visible mold growth), and it does not cause drug resistance.
Zinc ions, as essential elements in the human body, achieve broad-spectrum antibacterial effects by interfering and destroying the proteins inside bacteria. It has high safety.
High-temperature resistant, suitable for PVC processing technology
The processing temperature of PVC shoe materials usually reaches 160-190℃ (foaming, injection molding, calendering, etc.). The decomposition temperature of Tianshi Lantian antibacterial agent is greater than 350℃, perfectly covering the processing temperature range of PVC, and it does not decompose or yellow during the entire process, with no attenuation of antibacterial performance.
No precipitation, long-lasting protection
Using inorganic carrier loading technology, the antibacterial components are embedded in the PVC substrate, not migrating or precipitating, resistant to water washing and wiping, and the protection period is long-lasting.
Good compatibility of the system, without affecting the performance of the base material
The nano-sized particle size and surface modification technology ensure uniform dispersion in the PVC resin, plasticizer, and foaming agent system, without agglomeration, without changing the softness, foaming rate, and wear resistance of the PVC shoe material, and without causing white spots or rough spots defects.
