How can non-woven fabrics be distinguished by fluorescence?
Nowadays, with the improvement of economic level, our concept of environmental protection is also increasing day by day. Many manufacturers are optimistic about the development prospects of non-woven fabric bags and are investing in this industry one after another. However, in the face of so many non-woven fabric bags in the market, how can we tell whether they are true or false? Now the editor has summarized some methods for your reference.
In order to distinguish the true and false of non-woven bags, we need to know several parameters that determine the quality of the products:
1. Look at the Turner of the nonwoven bag
It should be clear to everyone that sewing is very important in the process of non-woven bags. In order to save costs, cheap non-woven bags usually only run on a single line when the locomotive runs, and inexperienced workers are employed to make the sewing line of products not straight or even run.
2. Look at the grams of non-woven fabrics
The gram number here refers to the weight of non-woven fabrics within 1 square meter. The heavier the weight, the thicker and firmer the non-woven fabrics will naturally be. For non-woven fabric bags used for publicity in ordinary enterprises, 80 grams of non-woven fabrics are mostly applicable to save costs. 80 grams of non-woven fabrics can be reused for about 10 times. The handle is relatively thin. 70 grams can bear 4-5 kilograms of weight; 80 grams can bear 5-6 kilograms of weight, and so on.
3. Look at the non-woven fabric technology
A good quality non-woven fabric bag is not only strong and durable, but also very good-looking, and it is very classy to hold in your hand. Most non-woven fabric bags on the market use screen printing. Screen printed non-woven bags are cheap and have clear lines. In addition to human factors, there is another important indicator: pigments and some unscrupulous manufacturers use inferior coloring agents, resulting in non-woven bags that are not environmentally friendly and even have pungent odor.
The following is to introduce specific methods to detect the authenticity of non-woven fabric bags.
Method 1: Water test method
The non-environmental protection bag is placed in the water and pushed to the bottom. The non-toxic non-environmental protection bag has a small proportion and can float to the surface. The toxic non-environmental protection bag has a large proportion and sinks.
Method 2: Fire detection method
Non-toxic polyethylene non-environment friendly bag is flammable, with blue flame, yellow top, dripping like candle tears when burning, with paraffin flavor and less smoke. Poisonous PVC non-environment-friendly bag is not flammable, it will extinguish immediately after leaving the fire, the flame is yellow, the bottom is green, it can soften and draw wire, and it has the irritating smell of hydrochloric acid.
Method 3: Jitter Detection
Holding one end of the non-environmental protection bag by hand and shaking hard, the person who makes a crisp sound is nontoxic; those with stuffy voices are poisonous.
Method 4: Sensory examination
Non-toxic non-environmental protection bags are milky white, translucent, or colorless and transparent, flexible, feel smooth, and have a waxy surface. Toxic non-environmental protection bags are turbid or yellow in color and sticky in hand.
