Leather materials under various structures

Leather plays an irreplaceable role in moisture wicking, moisture absorption and air permeability in terms of chemical fiber fabrics or other fabrics. In the natural state, the leather completely dried contains 15% moisture, and the water carrying capacity of normal suede leather can reach 70% of its weight. Its main leather surface is still dry and dry without moisture. The main water vapor permeability of leather can reach more than 200g, and for the best of synthetic leather, the main microfiber leather is only about 10g. In addition, for leather itself, it is mainly a kind of porous body with three-dimensional super specific surface intertwined with protein fibers. There are about 1 million pores per square inch. In contrast, this structure will bring good air permeability of leather, and the air permeability per square meter per hour can reach more than 1000 liters under pressure. For this valuable moisture absorption or permeability, it is mainly to endow clothing and footwear with rare hygiene and comfort.
Environmentally friendly leather is also known as artificial leather. In terms of hand feel, microfiber skin and leather are relatively similar. The biggest difference between leather and artificial leather is that leather has natural pores that can dissipate air and heat, but not for artificial leather. For example, for some people, wearing artificial leather shoes will easily get beriberi, but wearing leather shoes will not, because for leather, it has natural pores.In terms of structural design, it has a reasonable structural design and is very clear in terms of structure and function. Therefore, when purchasing brand bags, we should pay attention to avoid excessive complexity of functions, and to be honest, simplicity and practicality is our best choice. In terms of designing the strap, it should be comfortable, and the strap should be relatively wide and can be adjusted at any time.
In terms of material and fabric, the brand leather bag generally adopts the top leather material of the first layer, and the leather bag under this material has a relatively soft feel and transparent luster, giving people an elegant and noble visual feeling in terms of quality; At the same time, the leather bags under this brand have very good wear resistance, water resistance, tear resistance and so on. In terms of workmanship, we usually work hard in terms of workmanship. We will observe the quality of the suture process between the belt and the bag body, between the inner and outer materials, and between the bag cover and the bag body when purchasing, and we need to pay special attention to whether the process is firm and whether there will be too large or too loose gaps in the stitches. In terms of leather bag accessories, the main structure is latch, zipper, hardware, etc., and when we buy, we need to observe whether the material is easy to fade or oxidize, whether the line around the zipper is tight, and whether the connection between accessories or zippers and the bag body presents a natural state, etc.
In terms of tanning, there are many main treatment methods from leather to leather. They are basically top leather and cow leather materials. From the perspective of the market, the price can vary by tens of times. Due to different tanning methods, it takes 3-6 months longer for some top leather, But for ordinary leather, it only takes 3-7 days. Because there are great differences in tanning methods, generally speaking, it can be divided into two categories: chrome tanning has trivalent chrome tanning, and in modern times, it is mainly the product of chemical development. It can be completed within 3-7 days after soaking the skin embryo in the environment that can be soaked in trivalent chromium with good color. It mainly has the advantages of fast production, colorful and low cost. From the market point of view, most of the bags used are chrome tanned leather, which meets and conforms to the understanding of many users on leather. After chrome tanning, the fiber layer will generally undergo material damage in many chemical substances, and then evolve into a flocculent structure. Therefore, it will appear relatively soft, and it will not and cannot be polished for edge sealing.