For nylon material, first explain two proper nouns, d and T. Td=g/l*9000 where g is the weight of the wire (grams) and l is the length of the wire (meters). In fact, there is no need to remember any formula. It actually represents the weight of the unit length line. For example, the base fabric of many backpacks is DuPont's 1000d nylon, which has a very high density and is very wear-resistant. Then, in other parts of the backpack that are not easy to wear, the material can be 600d or 420d nylon. The larger the number in front of their relative density d, the heavier the cloth of the same area. Usually tents use 150 or 70d nylon, considering cost/weight/wear resistance, but on some high-end ultra-light tents, such as mhw's annapurna, in order to reduce weight, 30d, 40d fabrics are used, at the cost of considerable cost and relatively durable Increase and decrease in abrasiveness.
The t in the fabric generally refers to polyester taffeta, which is a nylon and silk-like fabric. Generally used as the tent's outer and inner tents. It's light and strong, like 190t, and the number on the front means 1 inch (2.545, the sum of the number of warp and weft threads (density) in cm) is actually a unit of density. It can also be simply considered that the larger the number in front of t, the heavier the fabric of the same area. For external accounts, attention needs to be paid to whether a ripstop construction is used, given its vulnerability to harsh environments. In short, it is woven into a small square. Even if it is damaged a little, it will not get bigger and bigger in the strong wind.
The outer material of the backpack is made of dense waterproof, wear-resistant, fire-resistant and tear-resistant materials, mostly kodra and high-density nylon oxford. Generally, d is used to distinguish its functions, such as 420d oxford nylon, 1000d kodra nylon, etc. The higher the function, the better and more professional. Some of its stitches are treated with a waterproof spray film.
The outer material of the backpack is mainly 420d Oxford nylon, 1000d nylon, 600d or 1000D polyester (polyester) or 1000d corvra and other materials. The 1000d material has high density and is very wear-resistant, making it ideal for field use. Cordvra is a well-known high-grade wear-resistant nylon roving fabric developed by DuPont in the United States. The material's abrasion resistance is much higher than normal nylon or polyester, and it's lightweight. More than 90% of the world's famous brand backpacks are made of this prestigious nylon material. Compared with Oxford material, nylon material is more wear-resistant.
