Several problems in the processing of tent fabrics
In the past few years, although a lot of progress has been made in the development and application of tent products in my country, such as cover canvas, which initially meets the demand, there is a big gap compared with the development of foreign tent fabrics and product development levels. At present, there are many manufacturers of coated fabrics for tents in our country, but few can produce fabrics. Compared with foreign tent fabrics, it is obvious that domestic fabrics have low tear strength and rough surface. In terms of waterproofing, dyeing and other post-finishing, the surface is sticky and sticky. After a period of practice, cracking and staining problems occur.
Outdoor tents have higher requirements on the tearing strength of the outer tent fabrics. Most of these fabrics are coated and finished because they are waterproof. After the fabric is coated, the tearing strength is significantly reduced. After testing, the tearing strength after polyurethane coating drops by 75%, which greatly affects the performance. Therefore, how to improve the tear strength of the coated fabric is particularly important.
The adhesion fastness between the coating film and the fabric directly affects the performance and life of tent fabrics such as polyester tarpaulin. Insufficient adhesion fastness of the coating will cause the coating glue to fall off and peel off, which will seriously affect the waterproof effect and appearance quality; and in pursuit of adhesion fastness, the coating material enters the fabric too much, which will affect the tearing of the fabric. Breaking power. Therefore, in actual processing, a suitable process and appropriate prescription should be formulated according to the specific use requirements.
For products with high rain pressure, when making tents, in order to solve the problem of water seepage in the sewing area, polyurethane strips are often treated. In order to ensure the effect of sticking, when formulating the process, consideration should be given to minimizing the use of silicone-containing and other oily coating glues and ensuring that the coating glues are completely cross-linked.