1. Introduction

Model ZY6155A oxygen index tester is a new type of product developed according to the technical requirements of national standard GB / T2406.2. The instrument is used to measure the volume percentage of oxygen needed in the process of polymer combustion. The oxygen index value of the polymer is just the lowest oxygen concentration (also called oxygen index) needed for the sample combustion in the mixture of oxygen and nitrogen needed to maintain the combustion time of 180 s or 50 mm long after ignition.

The instrument can be used not only as a means to identify the flame retardancy of polymers, but also as a research tool to study flame retardant formulation in laboratory and develop new flame retardant materials. It is suitable for testing the combustibility of fixed materials, laminated materials, foam plastics, fabrics, films and other materials.

The structure design of the instrument is reasonable, and the operation and maintenance are convenient. The test system adopts imported oxygen sensor and shows the result with digital display. It has the advantages of accurate judgement and good reproducibility, and is an ideal test equipment for scientific research and production quality control.

 

2. Standards

GB/T2406.2, ASTM D2863

 

3. Main Technical Indicators

(1) Measurement range: 0 ~ 80%

(2) Resolution: 0.1 L/min

(3) Measurement accuracy: level 2.5.

(4) Combustion chamber height: 450 mm, combustion chamber inner diameter: Phi 75mm

(5) Gas flow rate in combustion chamber: 40mm/s ± 2mm/s

(6) Gas velocity at the top of the combustion chamber: 90 mm ± 10 mm/s

(7) Input pressure: 0.25 ~ 0.5 Mpa adjustable.

(8) Oxygen and Nitrogen Mixed Gas Inlet: Pressure Regulating Valve, Flow Regulating Valve, Gas Filter and Mixing Chamber

(9) Glass bead: 4.5 mm, filling height 95 mm

(10) Sample clip can be used for soft and hard plastics.

(11) Power and power: AC220 (± 10%) V / 50 HZ, 100 W

(12) The inner frame size of the sample clip is 140 mm * 38 mm.

(13) Outline size: L630 * W350 * H655 mm.

(14) Igniter: special butane handheld ignitor.

 

4. Working Conditions Of Instruments

(1) Ambient temperature: -10℃ ~ 45℃

(2) Relative humidity: < 85%

(3) Use of gases: gaseous oxygen for industrial use GB3863; gaseous nitrogen for industrial use GB3864; pressure relief valves for both bottles of gases;

(4) Work pressure: 0.2 Mpa