News

Home > News >

Company News About In Southeast Asia's Hot and Humid Climate: How to Prevent Product Mold Through Production Line Design

Events

Cases

Contacts

Contacts: Miss. Jessie

Tel: 86--18859442931

Contact Now

Mail Us

In Southeast Asia's Hot and Humid Climate: How to Prevent Product Mold Through Production Line Design

2025-10-21

Southeast Asia’s year-round high temperatures (average daily 25-35°C) and high humidity (relative humidity 60%-90%) pose an "invisible challenge" to sanitary napkin production. The hot and humid environment easily causes raw materials to absorb moisture and finished products to develop microbial growth. According to data from the Southeast Asia Hygiene Products Association, the average product rejection rate due to mold in local factories reaches 3.2%—far higher than the global average of 1.5%. For sanitary napkin brands expanding into the Southeast Asian market, "heat and humidity-resistant design" of production lines has become key to ensuring product quality. Combining practical cases, this article explains how to avoid mold risks at the source through production line design.

1. Raw Material Preprocessing: Adding a "Shield" to "Moisture-Susceptible Materials"

Core raw materials for sanitary napkins, such as non-woven fabrics and superabsorbent polymers (SAP), easily absorb moisture from the air in high-humidity environments, creating a breeding ground for mold. To address this, production lines need to add "dehumidification and protection modules" before raw materials enter the processing stage:

Dynamic Dehumidification System: Install airtight dehumidification chambers at the raw material unwinding stations. Using low-temperature desiccant wheel technology, the humidity inside the chambers is stably controlled at 35%-40%. At the same time, infrared moisture detectors are used to real-time monitor the moisture content of non-woven fabrics (with a threshold set at ≤8%). If the moisture content exceeds the standard, an alarm is triggered immediately and material feeding is automatically paused. After an Indonesian factory introduced this design, the subsequent mold rate caused by raw material moisture absorption dropped by 62%.

Antibacterial Coating Synchronous Spraying: For mold-susceptible materials like organic cotton, an antibacterial agent spraying module can be integrated into the preprocessing stage of the production line. Food-grade silver ion antibacterial agents are used to apply a uniform 0.3mm coating on the material surface. This not only does not affect the product’s breathability but also inhibits the growth of microorganisms such as Escherichia coli and mold. Tests show it can extend the antibacterial effect of finished products to 18 months.

2. Production Environment Control: Building a "Constant Temperature and Humidity" Processing Space

Traditional open production lines struggle to resist the intrusion of external hot and humid air. However, an environmental design featuring "zonal temperature control + negative pressure dust prevention" can create a stable "mold-resistant barrier" for the production process:

Three-Zone Temperature and Humidity Control: Divide the production line into three zones—raw material zone (22-25°C, humidity 35%-40%), processing zone (24-26°C, humidity 40%-45%), and finished product temporary storage zone (20-22°C, humidity 38%-42%). Each zone is equipped with independent central air conditioning and dehumidification units, controlled in linkage via a PLC system to avoid condensation caused by temperature and humidity fluctuations.

Negative Pressure Dust Prevention and Air Purification: The production workshop adopts a negative pressure design (air pressure 5-10Pa lower than the outside) to prevent the infiltration of external hot and humid air. Meanwhile, HEPA Grade 13 air filters are installed, with 12 air changes per hour to filter mold spores and dust in the air. After a Vietnamese factory applied this solution, the concentration of mold spores in the workshop dropped from 120 CFU/m³ to below 35 CFU/m³.

3. Process Optimization: Blocking the Mold Path "From Processing to Packaging"

In addition to environmental control, optimizing production process details can further reduce mold risks, with a focus on the drying and packaging stages:

Low-Temperature Rapid Drying Process: To address the high energy consumption and easy moisture regain of materials in traditional hot air drying, the new-generation production line adopts heat pump cycle drying technology. The drying temperature is controlled at 55-60°C (lower than the 70°C temperature suitable for mold growth), and the drying time is extended to 120 seconds. This stabilizes the moisture content of finished products at 5%-6%, reducing the moisture regain rate by 45% compared to traditional processes.

Leak-Proof Sealing and Nitrogen Packaging Integration: Upgrade the packaging station with a "double heat sealing + vacuum nitrogen filling" system. The first heat seal ensures sealing integrity (seal width ≥5mm), and the second heat seal detects and repairs tiny leaks. At the same time, 99.9% pure nitrogen is filled into the packaging to replace air humidity, keeping the humidity inside the packaging at 30%-35% and effectively inhibiting mold growth. After a Malaysian brand adopted this solution, the storage period of finished products was extended from 3 months to 6 months, with an almost zero mold rate.

Conclusion: Customized Design for the Southeast Asian Market

In Southeast Asia’s hot and humid environment, the "mold-resistant design" of sanitary napkin production lines is not a simple combination of single technologies. Instead, it requires customized planning based on local climate characteristics, raw material properties, and production scale. Whether it is the "modular dehumidification unit" for small and medium-sized factories or the "full-process constant temperature and humidity system" for large factories, the core lies in blocking the mold path through the entire chain of "source control - process protection - finished product guarantee". For equipment manufacturers, only by deeply understanding the pain points of the regional market can they provide production line solutions that truly meet needs, helping customers achieve stable production and competitive quality in the Southeast Asian market.

News

Cases

In Southeast Asia's Hot and Humid Climate: How to Prevent Product Mold Through Production Line Design

Baby Diaper Production Line

Adult Diaper Production Line

Sanitary Napkin Production Line

Sanitary Pad Production Line

Baby Training Pants Production Line

Big Ring Waist Baby Diaper Production Line

Pet Diaper Production Line