The tripod is a very important accessory for office chairs. Evaluation of whether it is a high-quality office chair product is a good or bad tripod which is related to the overall quality level. Generally speaking, in addition to metal feet, plastic feet and nylon feet are the most common materials for making office chair feet. How do consumers distinguish their materials? Now let’s introduce their respective characteristics to everyone.
Plastic tripod: Industrial name: Polypropylene (indicated by PP letters) Advantages: 1. Rigid and tough. High bending strength, fatigue resistance and stress cracking resistance
2. Light weight 3. Maintain its mechanical properties at high temperatures. Disadvantages: 1. Be brittle below 0°C 2. Poor weather resistance (the lowest temperature in winter in most northern regions can be lower than this)
Nylon tripod: nylon 66 (indicated by PA66) Usually the official product tripod is marked directly underneath; chemical formula: (CH 2)5 NHCO
Advantages: 1. The strength is higher than all polyamide varieties. 2. The yield strength and rigidity are higher than that of nylon 6 and nylon 610. 3. It still has higher strength, toughness, rigidity and low friction coefficient in a wider temperature range. 4. Oil resistance and many chemical reagents and solvents 5. Good abrasion resistance Disadvantages: 1. High moisture absorption 2. Impact strength is reduced in a dry environment 3. Molding processing technology is not easy to control
From the above, we can see their respective characteristics. Nylon material is an ideal material for making chair legs and has good climate adaptability. From our long-term observations, it is concluded that the service life of nylon tripods can generally reach about three years, which is one of the reasons why many furniture companies guarantee three years of quality. The nylon tripod is slightly different from the plastic feet (PP) in shape, and the nylon tripod is obviously slimmer. The PP foot is slightly thicker to ensure it can be used. Compared with plastic tripods, nylon feet are much more expensive, so there are PP tripods with the same shape as nylon feet on the market, but there is no PA66 logo. Listening to the sound can also clearly feel that the nylon feet are more crisp. I hope you can pay more attention to differences when buying office chairs. The more high-quality tripod is of course the tripod made of aluminum alloy. It is also very important to distinguish aluminum alloy feet from ordinary metal feet. Some poor-quality metal feet are far worse than nylon feet.