Some anti-static shoes, after a period of use, the sole began to yellow slightly, what is the reason?
We all know that anti-static shoes are integrated with anti-static clothing, and ultimately the contact between the sole and the ground will discharge the body's static electricity to the earth. Anti-static shoes protect the safety and health of production workers and ensure the quality of the products. So if anti-static shoes sole yellowing phenomenon, will not affect the performance of anti-static shoes it?
In fact, the cause of anti-static shoes yellowing is the material of the sole. This material is PU material. U is a polyurethane material that is easily degraded when exposed to air. It takes a long time to become yellow and hydrolyzed, and gradually becomes light yellow. As the use time goes by, the sole becomes more and more yellow. The anti-static shoes, the color of the soles of the shades of yellow, is due to people wearing different habits.
PU material is the main material for making anti-static shoes. It has the advantages of low density, soft texture, good elasticity, comfort, and light weight. It is suitable for staff who need to stand for a long time. The disadvantage is that the sole is easy to yellow, which does not affect the anti-static performance of anti-static shoes. If the sole is yellow, you can still use it safely.
ps sheet is a new type of environmentally friendly packaging material developed in recent years. With its excellent thermoforming performance, good defensive performance, environmental performance and hygiene performance, it is widely used in medicine, food, toys, electronics and clothing.
main feature:
1. Low static electricity generation, suitable for packaging products that require low static electricity.
2. Easy to vacuum form, and the product has good anti-attack performance.
3. It has good hygienic properties and can be in direct contact with food without causing harm or benefit.
4. It is easy to be colored and can be made into materials of different colors and produced into vacuum covers of different colors.
5. Good hardness, this kind of sheet material has better hardness than other sheet materials of the same thickness. The thermoformed cup can be used as a hot and cold drink cup.
6. It meets environmental protection requirements and can be recycled and reused. When its waste is incinerated, it does not produce harmful substances that harm the environment.
The main purpose:
1. Low static electricity generation (such as electronic products...)
2. Food packaging (such as: beverages, candy, and meat... packaging)
3. Dairy products (dairy products packaged in polystyrene sheet containers can be placed in a cold storage and will not deteriorate easily;)
HIPS performance parameters:
Specific gravity: 1.04g/cm
Tensile strength: longitudinal ≥ 26MPa, transverse 24 ≥ MPa
Guard strength (without notch): 18KJ/m2
Heated size change (no lateral)＜4%
Vicat deformation temperature: 90℃
Hygienic performance meets: GB9689 standard
Transparent PS performance parameters:
Specific gravity: 1.04/cm
Tensile strength: longitudinal ≥ 26MPa, transverse 24 ≥ MPa
Guard strength (without notch): 18KJ/m2
Heated size change (vertical and horizontal) <4%
Light transmittance: ≥85%
Hygienic performance meets: GB9689 standard
ps sheet, black ps film, PS lid
Shandong Top Leader Plastic Packing CO., LTD , https://www.sdzlplastic.com