لو جلد ستوكات wants to replace part of the leather for shoe material, يحتاج إلى نفاذية رطوبة ممتازة ووظيفة مقاومة للماء, وإلا سيكون من غير المريح ارتداء أحذية مصنوعة من جلد ستوكات.
So how can microfiber leather for shoes have both moisture permeability and waterproof function? The answer is to do something on the microfiber leather base fabric.
لأن نفاذية الرطوبة هي في الواقع عمليتان للامتزاز والنقل, then we need to have water vapor (يعرق) adsorption points on the microfiber leather base cloth, so that the water vapor inside the shoe can be adsorbed on the microfiber leather base cloth, ومن ثم يتم نقله تدريجياً إلى الجزء الخارجي من الحذاء. So how can the adsorption point adsorb water vapor? It can be done in two ways, both hydrogen bonding adsorption and porous adsorption. Since water vapor can form hydrogen bond with nylon fiber of microfiber leather base cloth more easily, it has certain hydrophilic adsorption performance, so microfiber leather base cloth has certain hydrophilic adsorption performance. Then again, microfiber base cloth generally has more pores, so the larger the surface area is, the more water vapor will be absorbed. بعد الامتزاز, the water vapor should be transferred to the outer layer, so the pore size and open pore rate of microfiber leather base cloth determine the speed and total amount of transfer.
بالطبع, because the pore size of microfiber leather is large and uneven, على الرغم من أنه يحتوي على وظيفة نفاذية الرطوبة, rainwater can easily pass through it, which means it cannot reach the function of waterproof. وبالتالي, special treatment of microfiber leather base fabric is needed to make it also have some hydrophobic property. كيف يتم ذلك؟? The diameter of water vapor molecule is 4×10-4μm, and the minimum diameter of the micro-pore through which rain and fog can pass is 20μm for fog, 400-900μm for light rain, and more than 2000μm for medium and heavy rain. بعبارات الشخص العادي, it means that the pore size of microfiber leather base fabric is designed to be between the diameter of water vapor molecules and the diameter of rain and fog perforation, and it can achieve the function of both moisture permeability and waterproof.
To sum up, in the process of producing microfiber leather base fabric for shoes, reasonable design in the pore size and opening rate of the base fabric can make the microfiber leather for shoes have both moisture permeability and waterproof function.
