Many laundry plants in East Asia plum rain belts, the Southeast Asian rainforest regions, the South American rainy regions, the West coast of Oceania, and the temperate humid regions face prolonged periods of rainy, humid, and hot weather every year. The temperature of these regions is 20–35℃, and the ambient relative humidity exceeds 75% for a long time. These conditions create an ideal environment for mildew growth. Linen mildew, excessive microbial contamination, and biofilm buildup inside equipment are common in laundry plants.
For linen laundry factories, inadequate washing disinfection, insufficient drying, and poor ventilation in the humid climate cause mildews to grow on linens. This can lead to stubborn mildew stains, musty odors, and fiber damage. This also reduces linen service life and damages the hotel’s reputation while leading to hygiene and safety risks, such as skin allergies and respiratory discomfort.
Core Reason
Temperature and humidity are the two key factors of mildew growth. Rainy areas commonly form a hot, humid, closed environment. Laundry workshops suffer from poor ventilation, and the outside moisture continues to infiltrate. Linens still have residual moisture after rinsing and drying. Washer drums, pipelines, and the corners of conveyor systems are likely to form moisture and soil buildup.
Small amounts of residual moisture and soil can accelerate the growth of mildew and bacteria, causing a secondary contamination of linens. This increases the reprocessing and operational costs of laundry plants.
Prevention & Control Solutions
● Standardize washing & disinfection
According to the international laundry hygiene standards, the main wash temperature of heat-resistant linens exceeds 80℃ and keeps for over 10 minutes. Compliant detergents and disinfectants thoroughly destroy microbial cells. However, low-temperature washing easily causes residual microorganisms. It is the main reason for mildew in humid areas.
The Kingstar tunnel washer system is equipped with smart temperature control and a precise chemical dosing system. It can constantly control the wash temperature and chemical concentration. It meets the washing demands in different humid regions worldwide. A stable disinfection process reduces mildew growth at the source.
● Avoid cross-contamination
Soiled linens and clean linens should be stored and conveyed separately to prevent cross-contamination. Under a long-term humid environment, the gaps in washer drums, conveying belts, and ironing equipment are easy to form biofilms, becoming hard-to-clean areas. It is necessary to deeply clean and disinfect washing machines and conveying systems.
The surface framework of the Kingstar industrial washing machine uses special anti-corrosion treatment. The inner drum is made of heavy-duty 304 stainless steel. Easy-to-clean design helps reduce residual soils. This equipment is suitable for frequent cleaning and maintenance needs in rainy areas. It can efficiently prevent mildew growth in equipment.
● High-temperature drying & ironing
The efficiency of air drying to remove moisture in humid areas is very low. Thorough mechanical drying is essential to prevent mildew growth. During the linen drying and ironing stages, residual mildew spores are further killed, and moisture inside fibers is evaporated due to high temperature.
The pass-through dryer in Kingstar tunnel washer systems can continue to precisely output heat. It also allows the humidity in linen fibers to drop below the safe threshold. The closed-loop condensation dehumidification system recycles the evaporated moisture in real-time. It prevents humidity from rising again inside the workshop and mildew at the source.
Kingstar high-speed ironing line features high thermal efficiency and even dehumidification. It can quickly dry bulk linens to remove residual moisture in fibers. Even in a long-term rainy and humid environment, it also ensures linens meet the dryness standards.
● Smart storage management
In the warehouse, clean linens should be stored off the floor and away from walls. Zoned and sorted storage, ventilation, and pest control cannot be ignored. In rainy and plum rain seasons, dehumidification equipment is capable of strictly controlling the storage humidity. Closed moisture-proof storage combined with ventilation and dehumidification avoids the moisture intrusion.
Mildew Stain Removal
● Linen mildew stains
- White linens: high-temperature main wash + chlorine bleach
- Colored linens: oxygen bleach + peroxide
- Special delicate fabrics: manual disinfection and cleaning for extending the linen usage cycle
● Equipment mildew stains
- Small accessories: dismantle and soak for disinfection
- Large equipment: high-alkaline high-temperature cleaning + high-pressure flushing. Finally, use approved disinfectants to remove biofilms and stubborn mildews thoroughly.
Conclusion
Preventing mildew growth is more cost-effective than dealing with mildew contamination afterward. Professional washing machines and standardized management processes will help laundry plants in rainy and plum rain areas reduce costs stably, improve the quality, and maintain compliant operations.
Q&A
Q1: Besides plum rain areas, what overseas laundry plants need to implement long-term mildew prevention?
A1: Laundry plants in Southeast Asian tropical rainforest regions, plum rain areas in Korea and Japan, the West coast of New Zealand, and South America rainy regions. They should take regular prevention measures.
Q2: What is the critical stage to prevent and control linen mildew?
A2: High-temperature full drying. Air drying cannot remove residual moisture under a humid environment. Standardized high-temperature wash and iron can prevent mildew growth at the source.
Q3: What benefits does Kingstar equipment offer to laundry plants in humid areas?
A3: Kingstar equipment has smart temperature control for washing, efficient drying and ironing, easy-clean and corrosion-proof design. This helps prevent mildew steadily, reducing linen damage and rewash costs.
Post time: Jun-05-2026