Is it truly hydrophilic or just pseudo-hydrophilic? The durability of hydrophilic masterbatch is verified in this way 

hydrophilic masterbatch is widely used in non-woven fabrics (such as medical supplies and hygiene products), agricultural covering fabrics, etc. Its core function is to impart permanent hydrophilic properties to polyolefin fibers like polypropylene. However, in actual use, some non-woven fabrics show good hydrophilic performance when they are freshly produced, but this performance significantly deteriorates after being stored for a few weeks or after being washed once. This is likely due to the insufficient durability of the hydrophilic agent - it is a "false hydrophilicity". Below, from two perspectives, we will help you clarify how to verify the authenticity and durability of the hydrophilic masterbatch. 

I. The Difference Between True Hydrophilicity and False Hydrophilicity: Durability is the Key 

Whether the hydrophilic effect of the hydrophilic masterbatch can be maintained for a long time is the key factor in evaluating its quality. 

True Hydrophilicity: Hydrophilic agents are combined with fibers through physical or chemical means, evenly distributed on the surface and inside of the fibers. They can withstand a certain degree of friction, washing, or aging over time, and the hydrophilic effect remains stable. For hydrophilic masterbatches used in cosmetics or medical products, this durability is particularly crucial to ensure consistent performance throughout the product's shelf life. 

Hydrophobic: The hydrophilic agent is only physically adsorbed on the surface of the fibers, without a firm bond. This type of non-woven fabric may have excellent hydrophilic properties when newly produced, but after being stacked, transported, or simply washed with water, the hydrophilic agent is prone to or migration， and the hydrophilic effect rapidly diminishes. If only the initial performance is considered during procurement， this risk may be overlooked. 

II. How to verify the durability of hydrophilic masterbatch? 

Since durability is so crucial, how should we ensure it during the procurement process? 

Re-test the hydrophilic effect after accelerated aging: The non-woven fabric samples made with hydrophilic masterbatch will be placed in a high-temperature and high-humidity environment (such as 50℃, 80% relative humidity) for a certain period of time (such as 72 hours), or after multiple water washes, their hydrophilic properties (such as liquid penetration time, contact angle) will be tested again. If the hydrophilic performance significantly decreases after aging, it indicates that the durability of the hydrophilic agent is insufficient. Lu'an Qingsong Masterbatch Co., Ltd. focuses on the production of non-woven fabric masterbatches, polypropylene masterbatches, and hydrophilic masterbatches, and can match a hydrophilic agent system according to the application. 

Comparing new products with samples after storage: Compare the hydrophilic performance of the newly produced non-woven fabric with that of the same batch of samples that have been naturally stored in the warehouse for several weeks or months. If the hydrophilic effect significantly deteriorates after storage, it indicates that the hydrophilic agent has migrated or failed during storage at room temperature. 

Simulation of actual usage conditions testing: Based on your final application, conduct tests under actual usage conditions. For example, when used as agricultural covering fabric, the change in hydrophilic effect after rain erosion can be simulated; when used as medical non-woven fabric, the retention of hydrophilic performance after conventional sterilization treatment can be simulated. 

Summary and Selection Suggestions 

When purchasing hydrophilic masterbatch, it is recommended to verify its durability according to the following steps: 

Request the supplier to provide durability data: Inquire whether the supplier has conducted durability tests on the hydrophilic effect, and request the relevant data (such as the change in liquid penetration time after aging). 

Carry out accelerated aging verification independently: After the sample is made into non-woven fabric, conduct high-temperature and high-humidity accelerated aging or water washing tests, and compare the changes in hydrophilic properties before and after aging. 

Pay attention to the supplier's formulation and process: Understand the types and combination methods of the hydrophilic agents used by the supplier. The durability of the physical mixing type is usually weaker than that of the chemical bonding type. 

Lu'an Qingsong Pigment Masterbatch Co., Ltd. specializes in the production of non-woven fabric pigment masterbatches, polypropylene pigment masterbatches, PP pigment masterbatches, plastic blown film pigment masterbatches, hydrophilic pigment masterbatches, flame-retardant pigment masterbatches, etc. We can match hydrophilic agent systems according to the application requirements. Please feel free to send samples for testing and communicate specific hydrophilic requirements. 

Official website: www.qssml.com