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How to choose hydrophilic masterbatch? Mastering these two points will make purchasing easier.
Hydrophilic masterbatches are widely used in non-woven fabrics (such as medical supplies and hygiene products), agricultural mulching fabrics, filtration materials, etc. Their main function is to impart permanent hydrophilic properties to polyolefin fibers like polypropylene (PP). As for procurement, choosing the right hydrophilic masterbatch is crucial for ensuring the final product's drainage, permeability, or anti-static performance. Below are two core concerns to consider when making the purchase.
Step 1: Determine the purpose and hydrophilicity level
The requirements for hydrophilicity vary greatly depending on the specific application scenarios. Please confirm the following information first, as it will help the supplier recommend suitable products.
Eisai and medical non-woven fabrics (diapers, sanitary napkins, medical bed sheets): Require rapid drainage, low backflow volume, and be gentle and non-irritating to the skin. During procurement, provide target liquid penetration time (e.g., ≤ 3 seconds) and backflow volume indicators to enable the supplier to match an efficient hydrophilic agent system. At the same time, confirm whether the masterbatch complies with relevant biocompatibility standards.
Agricultural mulching fabric: It should have the properties of water permeability and moisture retention, while also possessing certain weather resistance. The hydrophilic effect needs to remain stable in outdoor environments. It is recommended to choose hydrophilic masterbatch that has added anti-aging additives.
Filtering material: It is required to be uniformly moistened to prevent the filtration efficiency from decreasing due to local water repellency. The uniformity of the distribution of the hydrophilic agent on the fiber surface is more important than simply pursuing rapid penetration.
General industrial fabrics: If anti-static properties are required, a composite masterbatch that combines both hydrophilic and anti-static functions can be selected.
Step 2: Evaluate the compatibility of quality and craftsmanship
The effect of hydrophilic masterbatch is not only determined by the formula, but also closely related to its dispersibility, batch stability and its influence on the spinning process.
Dispersion and filtration performance: If the hydrophilic masterbatch is not evenly dispersed, it will result in uneven hydrophilic effect on the fabric surface, or cause the filtration pressure during spinning to rise rapidly. When purchasing, you can request the supplier to provide the filter press values (DF values) or dispersion test data of recent batches as a reference for evaluation.
Impact on spinning process: The addition of hydrophilic masterbatch may affect the fluidity of the spinning melt and the spinning temperature. It is recommended to conduct a small-scale trial on the actual production line after sampling, observing the breakage rate, changes in filtration pressure, and the hydrophilic effect of the finished fabric (such as contact angle, liquid penetration time). This is the most direct way to verify the compatibility of the masterbatch.
Batch stability: The functional indicators of the hydrophilic masterbatch (such as the hydrophilic effect) require greater consistency between batches compared to appearance and color. When purchasing, it is recommended to ask the supplier to provide comparative data on the hydrophilic effect of multiple batches in recent times (such as the liquid penetration time under the same formula), to assess its stability.
Functional persistence: Some hydrophilic agents may precipitate over time or during washing, resulting in a decline in the hydrophilic effect. If you need to maintain the hydrophilic property for a long time (such as reusable medical fabrics), it is recommended to inquire about the water washing or durability test data of the masterbatch provided by the supplier.
Summary and Selection Suggestions
When purchasing hydrophilic masterbatch, it is recommended to confirm the following steps:
Specify the intended use and purpose: for pharmaceuticals, agriculture, filtration or industry? Provide the required penetration time, backflow volume or contact angle for the target liquid.
Re-evaluate the process and quality: Conduct on-machine trials with samples, observe the hydrophilic effect and the stability of the spinning process. At the same time, require the supplier to provide comparative data from multiple recent batches of functional tests.
Finally, confirm the durability of the function: If you require a long-lasting hydrophilic effect, ask the supplier whether it has undergone durability testing.
Lu'an Qingsong Masterbatch Co., Ltd. specializes in the production of polypropylene (PP) color masterbatches, acrylic fiber color masterbatches, non-woven fabric color masterbatches, plastic blown film color masterbatches, hydrophilic masterbatches, flame-retardant masterbatches, etc. We can match hydrophilic agent systems according to the application requirements. Please feel free to request samples for testing and communicate specific hydrophilic requirements.
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