Considerations for Using Hydrophilic Masterbatch in Chemical Adsorption Pads

The application of hydrophilic masterbatch in chemical adsorption padsrequires attention to the following points：

I. Core Performance Requirements

1. Hydrophilic Agent Type and Concentration

Hydrophilic masterbatch must contain specific surfactants (such as ethylene glycol polyoxyethylene ethers and fatty acid polyoxyethylene esters) or polar resins (such as polypropylene or PET/PBT composites).

The hydrophilic agent typically accounts for 20-40% of the total weight. High-concentration formulations can shorten the activation time of the hydrophilic effect (from the traditional 3-7 days to 1-3 days).

2. Adsorbent Material Compatibility

The processing temperature must match that of the absorbent pad substrate (e.g., polypropylene fiber, PET nonwoven fabric).

Adding an elastomer (e.g., 4-10% polyolefin grafted maleic anhydride) is necessary to improve compatibility between the masterbatch and the fiber and prevent delamination.

II. Key Processing Parameters

1. Addition Ratio and Dispersibility

The recommended addition level of the masterbatch in the substrate is 2-12%. Even dispersion must be ensured through a mixing process to avoid agglomeration and uneven adsorption performance.

2. Anti-aging and Durability

Antioxidants (e.g., 0.1-0.5% Antioxidant 1010 + 0.2-1% Antioxidant 168) are required to resist oxidative degradation during chemical adsorption.

III. Application Performance Evaluation

1. Adsorption Performance

Moisture Regain: PET-based adsorption pads can achieve a moisture regain of 0.4-2.0%, while PP-based adsorption pads rely on a surface polar molecular layer to enhance water absorption. 

Liquid Absorption Rate: Modified materials can shorten adsorption time by 30-50%, making them suitable for rapid processing in laboratories or industrial emergency scenarios.

2. Environmental Protection and Safety

Preferably select biodegradable masterbatches (such as PLA-based) or low-toxicity formulas (free of heavy metals) to comply with environmental protection policies.