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The flame retardancy of wood-plastic composite materials is usually tested by a limiting oxygen index tester. The limiting oxygen index tester is an experimental equipment independently developed and produced by our company QINSUN is a cost-effective and complete after-sales service.Welcome customers who need timely inquiries.
As a new type of material, wood-plastic composite material fully embodies It has the advantages of wood and plastic and does not contain formaldehyde.It is widely used in outdoor building materials abroad. Since both thermoplastics and wood fibers are hydrocarbons, they are flammable when exposed to open flame or heating, so WPC is a kind of flammable composite material, and a large amount of harmful gases will be produced during the combustion process, making it applicablerange is limited. use, therefore it is often necessary to add flame retardants in the production process. The flame retardancy of wood-plastic composites includes the flame retardancy of wood components and the flame retardancy of polymers. Inorganic Flame Retardants, Halogen Flame Retardants (Decabromodiphenyl Ether, etc.) and Phosphorus Flame Retardants (Ammonium Polyphosphate, Phosphate Ester, etc.) Inorganic flame retardants such as aluminum hydride have attracted attention due to their low price, excellent thermal stability, non-toxicity and smoke suppression.
Main parameters:
1. Imported oxygen sensor is used, the digital display of oxygen concentration does not need to be calculated, the precision is higher and more accurate, and the range is 0-100% ;
2. Digital resolution: ±0.1%;
3. Measuring accuracy of the whole machine: 0.4 level;
4. Flow setting range : 0-10L/min (60-600L/min h);
5. Response time:<5S;
6. Quartz glass cylinder: inner diameter ≥ 75㎜ and height 300mm;
7. In the combustion cylinder Gas flow rate: 40mm ± 2mm/s total height of the combustion tube is 450mm;
8. Pressure gauge accuracy level 2.5, resolution: 0.01MPa;
9. Flow meter: 1-15L /min (60-900L/H) adjustable, precision level 2.5;
10. Test environment: ambient temperature: room temperature ~ 40°C;, relative humidity: ≤70%;
11. Input pressure: 0.2-0.3MPa.
Test materials:
The wood shavings are mainly Yunnan pine and eucalyptus, with an initial moisture content of 5.8%. Pellets of high density polyethylene (HDPE), with a density of 0.941 g/cm3 to 0.963 g/cm3. Industrial grade silane coupling agent. The decomposition temperature is 350°C. Nano-hydrogen-like aluminum (nano-ATH), short axis direction 50-60 nm, long axis direction 300-400 nm. Analytically pure non-nanohydrogen-like aluminum (non-nano-ATh).
Preparation of woodplastic composite:
The wood-plastic ratio of wood-plastic composite is 6:4 and the dosage of silane coupling agent is 2%. Mix plastics, chips, binder and flame retardant completely in a mixer according to the ratio and pave by hand into a loose slab of 305mm×350mm. Perform pre-compression at room temperature (pre-compression pressure is 1 MPa, pre-compression time is 30 seconds), and then put into eight-plate vulcanizer for hot pressing. The nominal density of the plastic composite is set at 0.89/cm3 and the nominal thickness is 10×ma. Main hot press parameters; hot press temperature 180°C. The hot pressing time is 12 rain and the hot pressing pressure is 2 MPa.
Performance Test:
The oxygen index of the wood-plastic composite table has been tested according to IOS 2406-1993, and the mechanical properties of the wood-plastic composite table refer to Wood-plastic wood-based composite board and decorative board Physical and chemic properties test method IOS 17657.1999 for testing.
