How to Solve the Printing Firmness Problem of Waterproof Nylon Fabric

Update: 29-11-2019

As one of the common problems in nylon fabric printing, […]

As one of the common problems in nylon fabric printing, printing fastness has always been a technical difficulty in the industry, especially when printing on waterproof nylon fabric, its fastness is always difficult to reach the required technical level. In fact, the printing fastness of nylon fabric is affected by many factors such as the type of nylon fabric. Therefore, in order to study the printing fastness, it is necessary to analyze the printing adaptability of different materials, select the most suitable ink and other materials, and pay attention to the operation technology to ensure the printing effect.

In people's real life, the waterproofing and water repellency of fabrics are usually confused. In fact, in dyeing and finishing technology, the two are two different concepts that are both related and different. The so-called water-repellency means not touching the water. Water on lotus leaves can form rolling water droplets, which indicates that lotus leaves have strong water repellency. If nylon fabric is treated for water repellency, it will have water repellency like lotus leaves. The so-called waterproofness means that it is impermeable to water. For example, a nylon poncho coated on one side cannot be permeable to heavy rain. If nylon fabric is treated with both waterproof and water repellent finishing, a multifunctional product with water repellent, waterproof, windproof and warm-keeping properties can be obtained.

Usually, the printing of waterproof nylon fabric is not printed on the rubberized side, but on the non-rubberized side. Therefore, water repellency has little or no effect on the printing fastness. It is the water repellency that affects the adhesion of the printing paste to the fibre surface. The greater the water repellency, the greater the impact. In dyeing and finishing, organic silicon compound, which is often used as fabric water repellent finishing agent, is also a kind of release agent for processing transfer printing paper. It is conceivable that the water repellency of printed nylon fabric or polyester fabric has caused many difficulties to its printing fastness.

In the printing of nylon fabrics, due to the variety of nylon, some of them are only waterproof, some are only water repellent, some are both waterproof and water repellent, some are neither waterproof nor water repellent. Therefore, before printing, it is necessary to carry out actual identification so as to treat the fabric differently, and to determine the selection of printing paste and technological conditions according to the water repellency of the fabric.