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Mar 17, 2016
Product Name: Rigid Polyimide Foam
Since 2010, based on theoriginal technology and refer ourself to the international technical standard, SOLVER POLYIMIDE developed a new type of rigid PI foam integratedproduction line has been built, with1000MT annual output. With differentneeds,we can produce the PIfoam of density and intensity. The PI foam has thecharacters of high and low heat resistence, High fire retardent,radiationresistence,wave-transparent,microwave absorpting,anti-corrosion,longlife,excellentcomprehensive properties,the high rate of obturator,easy processing. It can bewidely used in aviation, spaceflight, navigation, transportation, constructionand so on.
This product has past the fireretardancy test in the Yuandong fire experiment center.And the result show thatour material is in well accordance with the technique target of smoke density、toxicity test、low flame-spread combuston heatvalue in《International fire test program application rules》require.The room temperatureemissions、high temperature split product、inhalation toxicity experiments on animals are inaccordance with human bddy health standards after Non metallic materialinspection center of People’s Liberation Army Navy detection.
APPLICATIONS:
The application in aerospace
The spherical frame is the air tight cockpit terminal.Andit is the thin-wall construction which is mainly made of ball cover、split-stopping tape、spherical frame edge andsuch components.The spherical frame will produce fatigue crack because of theairtight loading during the airplane ground-sky-ground process.So the keyproblem is how to prevent the airtight cabin fatigue damage.The rigid PIfoamplastic interlayer reinforcement structure can greatly improve the stability ofthe spherical frame and ruduce the weight of the spherical frame.
The rigid PI foam is used as core material of alae nasiparva,flap and airtight bulkhead in aircraft.The rigid PI foam has theextraoridinary fatigue resistence.It can be used in roter on the advanced highperformance helicopter.It can take the load from the roter’s rotation andprolong the life of roter.
The application in transportation
The rigid PI foam with the density 52kg/m3,ischaracterized by high strength and high creep resistence.The PI foam as thecomposite core material adopt the co-cure process mading the 5cm carbon diberand PI rein stressed-skin construction which can be used as self-host truckbody Sighificantly reducing the traffic noise.The structure made of tworeinforcing PI rigid foams can produce the bonnet and top cap.
The application in ships and warships
(1)The side shell,bulkhead,top of the carbin which havethe requirement of heat insulation,sound insulation.
(2)The cooling pipeline and high temperature steampipeline over 37℃.
(3)The submarine shell and frame part need processing ofsound transmission loss
(4)The submarine and frame parts which do the heat andsteam isolation avoid of the fog.
(5)Cryogenic vessel preservation.
Apperance requirements
1.1Surface:The surface should be smooth,the form hole bewell-distributed.
2.2Qualty:Product quality and conditions should beconsistent,clean,no impurities and defects affecting the processing or materialproperties.
1.3Color:The original color unless special provision.
1.4Toxicity:Avirulent,no harm to the skin long-termexposure.
1.5Odour:Odorlessness.
1.6Thickness:Based on the order,the error±5％ is permitted.
Technical requirement
Table 1 the specification of rigid PI foam
Model/Performance | Test item | Technical requirement | Test Standard | |
Rigid PI foam | ||||
Ⅰ | Ⅱ | |||
Physicochemical properties | Apparent density,kg/m³ | 70~110 | 110~200 | GB/T 6343 The determination of apparent density of foam and rubber. |
Thermal conductivity,W/m,K(23℃±2℃) | ≦0.04 | GB/T10295 The determination of insulation material of thermal,heat flow meter method. | ||
96hThe moisure absorption rate(relative humidity95％，temperature 49℃±2℃) | ≦5 | GB/T20312 The determination of consruction material and the products’hygrothermal performance,moisure absorption performance | ||
Radiation resistence | There is not marked change apparent when radiation dose attain 200000Gy. | JJF1018We use the potassium bichromate(silver)dose to measure the ray water uptake dose | ||
Temperature resistence | No crack,﹣55℃ Not stick,200℃,12h | GB/T9640Flexible and rigid foam polymer materials,accelerated aging test。 | ||
Acid resistence(20％hydrochloric acid) | There is not change after steeped for 24h. | ------ | ||
Alkali resistence(10％ caustic soda) | There is not any change in surface after for 24h. | ------- | ||
Petrol resistence(120#petrol) | There is not any change in volum after steeped for 24h. | ------- | ||
Tensile srength,MPa | ≧0.2 | ≧0.3 | GB/T6344Flexible foam polymer materials,the determination of tensile srength and crack growth rate | |
Compressive strength(10％)MPa | ≧0.35 | ≧0.45 | GB/T8813 The determination of rigid foam’compression performance | |
Toxicity of material | Ordinary temperatures toxicity | Meet the requirement of GJB 11.2、GJB 11.3 rules. | GJB11BNuclear submarine cabin air composition allowable concetration requirements. GJB3881Toxicity assessment of nonmetallic materials for ship. | |
Oridinary temperatures smoke and toxicity | Meet the requirement of FTP’s rules | IMO 2010FTP Part2 of rule The smoke and toxicity testing procedures | ||
Fire protecting performance | (limit)Oxygen index,％ | 40 | GB/T2406.2 Determination of the burning behaviour of plastics by oxygen index method.Part 2 greenhouse experiment. | |
Density of smoke(Dm) (Flameless mode flame mode) | 200 | GB/T10671 Test method for specific optical density of smoke generated by solid materials | ||
Flame resistence | After leaving the fire ignited material 1s self extinguishing and no droplet | GB/T2408 Test method for flammability of plastics.Level method and vertical method | ||
Low flame spread | Meet the requirement of FTP | IMO2010FTP The rule part 5-The surface materials flammability testing procedures | ||
Combustibility | Heat of combustion,MJ/㎡ | ≦45 | ISO1716The determination of heat of combustion | |
Workability | The construction technology | No dust,easyto cut,easy packaging,construction technology can meet the requirements of the users. | ------- | |
Acoustical behavior | Noise reduction cofficient | ≧0.6 | GB/T18696.1 The measurement of the acoustic impdance of sound absorption coefficient and impedance in tube Part1:Voltage Standing Wave Ratio | |
The concentration of harmful gases does not exceed therequirements of GJB 11B provisions of the cabin air froup divided allowableconcetration.The material of the median lethal concentration LC50≧50g/m3.
According to the 2010FTP rules of Annex 1 secondpart2--The smoke and toxicity testing procedures under the condition of hightemperature and smoke density detection materials smoke toxicity.The averageoptical density ratio requirement of flue gas(Dm)≦200;The smoke toxicityconcentration was less than the limit value in table 2.
Table 2 The limit value of toxics smoke concentration(Unit:ppm)
Smoke components | CO | HBr | HCI | HCN | HF | SO2 | NOX |
Smoke density | 1450 | 600 | 600 | 140 | 600 | 120 | 350 |
Note:SO2 for floor coverings,this index is 200ppm | |||||||
According to the 2010FTP rules of Annex 1 second part 5--Material testingfor pocedures for combusion,See Table 3 for specific requirements.
Table 3 PI foam surface burning characteristics
No. | Surface combustion characteristic index | Allowable value |
1 | Go out when the critical heat flux,kW/㎡ | ≧20.0 |
2 | Continuous combustion heat,MJ/㎡ | ≧1.5 |
3 | Gross heat release,MJ | ≦0.7 |
4 | The heat release peak,Kw | ≦4.0 |
Storage:The material must be stored in damp-proof packingand keep dry,the packing meet the need of military standard.
Characteristic
Lable the message in the corner of every panel as follow:
1、Material standard number,type,specification.
2、Lot No.and date of producted.
3、Lot
4、Logo of company.
5、Order No.(out packing only)
6、Quantity of load(out packing only)
7、Production address.