Model number：DDF-1

Seat structure and parameters

The seat is composed of armrest (including upper armrest), backrest, seat, air supply leg and flip connection mechanism.

Chair height: 980mm, seat height: 450mm, armrest height: 630mm, maximum length: 680mm, seat center distance: 580mm.

Performance characteristics

1. The soft core of the back and seat of the chair is made of high-quality polyurethane material with cold foaming and high rebound process. The built-in S-shaped spring has a density of 57kg/m3 and a density of 65kg /m3 for the back cushion. Its surface modeling is designed according to the principle of human engineering, the use of manual wrapping cloth refined processing, elegant appearance, comfortable seat, moderate hardness, high resilience unchanged type.

2. The backplane and the seat board are made of wooden multi-layer board and high frequency pressing, the skin is beech leather (the skin can be selected according to user needs), and the external coating is high frequency polyester polishing paint, which is beautiful and elegant. Due to the use of high frequency pressing, long-term use does not crack and has good moisture-proof function, the backing board is multi-layer board molded, and the seat board is equipped with sound absorption holes.

3, streamlined jointed handrail, the selection of high-quality wood, high frequency pressing molding, good material stability, no deformation, no cracking, beautiful and generous shape, can be selected according to the needs of users.

4, fabric selection of high-quality high-grade fabrics, there are a variety of colors for users to choose, and for anti-static, anti-moth treatment, long-term use without wrinkles, breaks, pilling, fading phenomenon. The flame retardant performance of the fabric is tested according to the international method, and the performance indicators can meet the B1 level requirements of the combustion performance evaluation conditions of decorative fabrics in the GB50222-95 Code for Fire Prevention of Interior Decoration Design of Buildings, and its combustion performance is the B1 level standard.

5, the chair is turned over with torsion spring frame damping rebound device, built-in slow rise, damping device, rebound has no noise, accurate return, the structure is the company's patented design. The seat turn-over test shall reach 200,000 times, and the durability test of the seat (including damping device) shall reach 50,000 times or more.

6, the chair leg is a single leg air supply column, the use of heavy round tubular air supply structure, the air supply is composed of double perforated steel pipe, the air inlet of the inner ring perforated steel pipe is provided with an air regulating plate to slow down the wind speed, reduce noise, balance the air pressure of each tuyere, metal plate stamping, bolt and ground fixed. Air supply capacity: 50m3/h; Wind speed: V≤0.1m/s; Noise: ≤12 Db; C, the air supply area of the mediation board is 7800㎡, 7510㎡7200㎡ and 6930㎡. Four adjustable air supply areas can make the air supply effect reach the best state. The unit air volume of the adjustable board is between 17.81cms 3/ mm 2 and 20.04cms 3/ mm 2 per second to meet the requirements of noise standards and pressure losses. The upper half of the load-bearing air duct exposed to the ground is convenient for installing the metal structural part of the chair and all parts of the overall chair, which can bear more than 250kg.

7, all the metal surface of the seat are sandblasting after the rust treatment electrostatic spray, its salt bath resistance, impact resistance, strong adhesion, corrosion resistance, smooth surface, beautiful, durable.

8, the back of the chair, the seat cushion has a sound absorption effect. The back of the chair has a sound reflection effect, and the bottom of the folded seat has a sound absorption effect. The bottom of the chair seat is perforated with good sound absorption effect.

9. The seat number is embroidered on the back of the seat, and the row number is located on the side of the seat at each opening.