How to select a good plastic chair

Plastic seat depth: for a chair dominated by sitting, the depth of the seat surface should be equal to the length of the thigh. After sitting down, the bend of the knee joint is right to the edge of the chair. The seat surface is too deep and there is no landing on the waist and back; The seat surface is too shallow and the thighs are not supported enough. They are uncomfortable.

Plastic seat height: it should be equal to the length of the lower leg. After sitting down, the lower leg sags naturally, and the soles of the feet just fall to the ground. It's not good to be too high, with your legs hanging, and under your thighs being pressed too much for too long; The seat surface is too low, the thighs can not be placed on the seat surface, and the weight of the human body is concentrated on the hips, which will be uncomfortable for a long time.

Plastic chair back: it is best to support the waist, back and neck in whole or in part. The longer you sit in a chair, the better the support. Because the dining chair is only used during meals, the neck can be ignored, and the office chair is best taken care of. The size of imported furniture is often more suitable for people in producing countries, so special attention should be paid to selection.

Materials of plastic chair surface and back: both should be "soft outside and hard inside" - the support should be strong enough, but the surface has a certain thickness of elastic layer. The outermost materials in contact with the human body should be breathable, wear-resistant, dirt resistant, and not easy to generate static electricity with the human body or clothes.