How to perform anti-aging treatment and hydrophilic treatment on non-woven fabrics-the role of modifiers

Author: Date: 2019-12-05 07:35:04 Hits: 1923 nonwovens sometimes due to different uses are being asked to join different properties, such as anti-aging properties, hydrophilic properties. Today we will learn the key modifiers for nonwovens with different functions. Anti-aging modifier The so-called anti-aging is to adopt certain measures to prevent and delay the chemical reaction of aging. At present, the more applicable anti-aging measures have the following four aspects. (1) Improve the chemical structure of the copolymer and introduce a structure containing a stable group, such as copolymerization and modification with a vinyl group monomer containing an antioxidant. (2) Deactivate and stabilize the active end groups. This method is mainly used for polyacetal polymers. (3) Physical stabilization, such as stretching orientation. (4) Add additives, such as antioxidants and light stabilizers. The fourth method is commonly used for anti-aging modification of spunbonded nonwovens, which has the advantages of simplicity, effectiveness and flexibility. The core issue in the application is the correct choice of additives. The anti-aging of spunbonded nonwovens mainly involves problems such as light-proofing and weathering. Hydrophilization modifiers Polypropylene, polyester, nylon, etc. are more different from natural fibers in that the former is a hydrophobic polymer, which has poor moisture absorption and air permeability, and is easy to generate static electricity, easy to stain, and easy to burn. Therefore, hydrophilization modification is an important aspect of spunbond nonwovens modification. Generally speaking, the hydrophilicity of fiber materials refers to the ability of fibers to absorb water and transport water to adjacent fibers. The polar groups in synthetic fiber macromolecules, such as hydroxyl (one OH), amide group (CONH), segment group (one COOH), amino group (-NH2), etc., are all hydrophilic groups, which can bond with water through hydrogen bonds. The association of molecules shows a certain affinity. Therefore, the hydrophilicity of the fiber can be improved by introducing a hydrophilic group into the fiber-forming polymer chain or adding a hydrophilic component to the polymer. Related tags: Previous: The effect of hot-rolling and bonding of non-woven fabrics on the web and fiber structure, and the combination of exploration and experiment analysis proved