聚乙烯蜡在母料中的应用
聚乙烯蜡广泛用于母料加工，以增强系统性能并促进颜料分散。它是一种常见的分散剂，可改善颜料分散性，这对于高质量母料生产至关重要。颜料分散直接影响色母粒的着色能力、最终产品的质量和着色成本。因此，实现良好的颜料分散性是必不可少的。
Mechanism of 聚乙烯蜡 Pigment Dispersion in 色母粒:
色母粒 is a pigment concentrate that uses resin as a carrier. Pigments exist in three states: primary particles, aggregates, and agglomerates. The dispersion mechanism involves breaking agglomerates into aggregates and primary particles and then stabilizing these newly formed particles. This process is known as lubrication-breaking-stabilization. However, the high viscosity of the resin melt and its poor compatibility with pigment surfaces make it challenging to penetrate the pores of the agglomerates. To address this issue, polyethylene wax is added to the system.During the processing of the masterbatch system with polyethylene wax, the wax melts with the resin and coats the pigment's surface.[1]
Polyethylene wax has low viscosity and good compatibility with pigments, making it easier to wet pigments and penetrate the internal pores of pigment agglomerates.This weakens cohesion and facilitating the opening of pigment agglomerates under the influence of external shear forces. It also enables quick wetting and protection of new particles. Additionally, polyethylene wax reduces system viscosity and improves fluidity. Therefore, the inclusion of polyethylene wax in masterbatch production enhances efficiency, increases output, and allows for higher pigment concentrations.
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为了确保聚乙烯蜡在色母粒中的最佳加工和应用，了解其机理和特性至关重要。色母粒中使用的聚乙烯蜡应具有以下关键特性：
高热稳定性：
聚乙烯蜡必须能够承受制造和成型有色产品所涉及的高温，而不会蒸发或分解，否则可能会损坏母料或有色产品。
强大的分散能力：
聚乙烯蜡可显著增强颜料分散性，这对母料的着色能力至关重要。分散良好的颜料可实现高着色力和出色的产品质量。
对机械性能无不利影响：
必须确保色母粒中使用的聚乙烯蜡不会对着色产品的机械性能产生负面影响，因为色母粒广泛用于薄壁产品和彩色薄膜的着色。
综上所述，色母粒中使用的聚乙烯蜡应具有较高的热稳定性、较强的分散能力，并且不会对有色制品的机械性能产生不利影响。此外，在特定的加工条件下，有一个最佳剂量范围可以在母料中实现有效的颜料分散。
[1]. 郭良玉,刘大煜,吴立峰.聚乙烯蜡在色母粒中的应用探讨[J].塑料,1998(03):33-37.
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