1. What is a finished cloth?
The name of the finished cloth is that the fabric that has completed all the processes is derived from the meaning of "the fabric that has been made on the market".
Finished fabrics are different from what we often call fabrics, which are fabrics that have been processed and treated, and are guided to partially or completely dyed, printed, shrunken or loose fabrics according to the existing demand trends in the market. The treated fabrics can be used directly into ready-to-wear, bedding, home textiles, curtains, shawls and other textiles. Therefore, softness is a popular selling point that the finished cloth inevitably needs to focus on!!
Second, why the finished cloth is not waterproof
It is the key selling point of the finished cloth - softness; More than 95% of the soft finished cloth or the finished cloth on the market is added with softener. Softeners are generally hydrophilic, which will affect the effect of waterproofing agents, especially silicone oil softeners, which have a great impact on oil resistance. This is why the finished cloth basically cannot achieve a good waterproof effect, and if you want to do three proofs, it is even more difficult.
Then you must be asking: Is there no way to solve this problem? Xiaobian will tell you today that there is a way.
Third, how to do a good job of waterproof finishing of the finished cloth
Under normal circumstances, if customers need to do waterproofing, we will pay attention to whether there is any added softener; What is the amount of softener, so that it can be used with the waterproofing agent at the same time under the best process and dosage, and the performance is good, which reduces the impact of the softener on the effect of the waterproofing agent, and at the same time achieves the customer's dual requirements for waterproof and soft fabrics. However, in the case of finished cloth (soft finishing has already been done), it is not possible to achieve the above-mentioned compatibility conditions. The second option can only be adopted, which is to remove the softener on the fabric and then carry out waterproof or three-proof finishing.
The following is the sharing of the three-proof processing technology of the finished cloth CVC brushed sweatshirt:
1. Finishing process
先预洗：预洗剂20g/l，一浸一轧(压力：3kg )→ 烘干焙烘(170℃X2min)
Then do waterproof or three-proof: one immersion and one rolling (pressure: 3kg) → drying and baking (185°CX3min)
2、测试标准：防水：AATCC 22 洗涤：AATCC 135-IV-A
3. Formula and waterproof results:
| numbering | 1 | 2 | 3 |
| XSY-C602三防整理剂 | 50g/L | ||
| XSY-C301 fluorine-free water repellent agent | 60g/L | ||
| XSY-C302 fluorine-free water repellent agent | 60g/L | ||
| XSY-CA01 crosslinker | 5g/L | 5g/L | |
| Waterproof level before washing | 100 (Oil Resistant Level 5) | 95 | 95 |
| Wash 5 times waterproof level | 90+ (Oil Resistant Level 5) | 90 | 90- |
| Wash 10 times waterproof level | 90 (Oil Resistant Level 4) | 80 | 80- |
Fourth, the test results and conclusions
From the data in the above table: under the premise of removing the softener, the three-proof finishing can achieve the initial waterproof 100 points and oil proof level 5; And switch to fluorine-free waterproofing agent for testing, or pre-washing process, although the initial effect can not reach 100 points, but can reach 95 points requirements, for customers whose waterproof requirements are not particularly high and do not require oil-proof effect, that is, you can reduce costs and achieve results, a win-win situation.
The next sharing: how to achieve the coexistence of softness and waterproofing or three-proof after removing the softener from the finished cloth!!