HVV 5# open end high quality anti brass garments metal zipper

How do flame resistant zippers work?

Flame resistant zippers are zippers that will not burn in case of a flame. Flame resistant zippers have good heat resistance and can slow down, stop or prevent flame spread. Flame resistant zippers are common in our daily life. For example, the zippers used in fire suits are flame resistant zippers. The following will be based on the characteristics of flame resistant zippers to introduce how the flame resistant zippers work.

The structure of flame resistant zippers

By comparison with ordinary zippers, the same structures are that they all have tape, teeth, slider, puller, the top end, the bottom end, and so on. However, their main difference is that some special treatment processes will be adopted in the manufacturing process of flame resistant zippers to reflect the functions of fire prevention and high-temperature resistance.

Teeth

According to the raw materials of zippers, there are three types of zippers. They are metal zippers, coil zippers, and plastic zippers. In order to make nylon coil zippers and resin zippers have a flame retardant effect, a certain proportion of flame retardant needs to be added to them. However, both the strength and quality of the zippers will be much lower than before by adding flame retardant to the raw materials of nylon and plastic zippers. Metal zipper teeth is considered to be the best choice for flame resistance zippers because of its hardness, stability, and heat resistance. In addition, the metal zippers can also be coated with flame retardant on the surface of the puller and teeth to improve performance.

Tape

There are usually two ways to make the tape obtain the flame retardant effect. The first method is to add a certain proportion of flame retardant substances to the raw materials of polyester yarn to achieve the flame retardant effect. The cost of this method is low. But the disadvantage of this method is that it may reduce the performance of a zipper, such as strength and tape colorfastness. The second method is to directly use flame retardant fibers to make tapes. Different from the first method, it can improve the performance of zippers like strength. But the cost of this method is high and some key manufacturing processes need to be improved. In addition, adding a special layer on the surface of the tape also can help to improve the flame retardant.

Zipper slider

The metal zipper sliders have the characteristics of fire prevention. In addition, the ideal choice of flame resistant zippers is electroplated sliders.

Grade and performance test of flame resistant zippers

Flame resistant zippers can be divided into four grades. They are A non-combustible material, BI non-combustible material, BZ combustible material, and B3 combustible material. And for the test methods of flame retardant, it can be referred to as GB/T5454-1997, GB/T5455-1197, or EN 469:2014. In addition to flame retardant, washing performance and long-term storage time also have an impact on flame resistant zippers.

Therefore, by comparing the structure of flame resistant zippers and ordinary zippers, it can be seen that it is necessary to carry out special treatment and processing on the teeth, tapes, and sliders of zippers to achieve the function of fire prevention.

The price is only for your reference, exact price will be quoted as your requested.

We have No. 3 to No. 10. nylon zipper long chain, metal zipper long chain and resin zipper long chain.

It can be matched with same size slider or without slider.

Package normally is 100-400m/roll, also can be customized.

It's suitable for luggage, textile, outdoor items, or made into finished zippers.

HVV zipper long chain has advantages of:
Eco-friendly, azo-free dyeing, accurate color matching and high color fastness
Flat tape, thick, and soft
Perfectly match with the standard model sliders
High strength teeth, not easy to burst teeth
Standard and strong packaging, and the product can be well protected
Fast delivery, high production capacity with guaranteed quality