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High power incombustible absorbing material
Publish time 2019-12-12 13:52
High power incombustible absorbing material
Product description:
High power flame resistant absorbing material, is a kind of flame retardant, carbon black impregnated non-woven fabric as the base material made of hollow microwave broadband absorber, currently mainly used in the microwave anechoic chamber and cover the anechoic chamber test equipment.If it is used to cover the reflectors in the test environment under the conditions of vertical incidence and oblique incidence, it can reduce the background noise, eliminate the clutter interference and improve the test accuracy.
Product performance:
Electrical properties:
Polyurethane foam is a kind of material with the best absorbing effect in microwave wide band because of its small parameters, small surface reflection and bulk absorption.
Flame retardant:
It meets the requirements of NRL8093, gb8624-b2, din4102-b2, iso11925-2, UL94 and other standards.Oxygen index ≥28%;Operating temperature: -50℃~80℃, up to 100℃ in a short time;The power capacity is 1KW/m, short 1.5kw /m.
Environmental protection:
Inorganic raw materials, non-toxic and odorless, no harmful gas release, strictly controlled from the source;The finished products meet the RoHS environmental requirements of the European Union;The finished product is halogen-free;The formaldehyde emission of finished products reached the standard of gb18580-2001e1.The air quality in the microwave anechoic chamber meets the GB/ t18883-2002 limited standard.
Physical property: evenly impregnated, absorbent components adhere firmly;Appearance color uniform and customizable color;High consistency of specifications, beautiful appearance, not hanging tip;Soft, strong mechanical extrusion resistance, resilient.
Application:
1. Construction of microwave anechoic chamber, absorbing screen and microwave anechoic chamber for various purposes;Generally not higher than a few small sa-100 specifications can also be used in equipment;Materials of different types, heights and structures can be selected flexibly according to the shape, performance requirements and different parts of the anechoic chamber.According to the customer demand design performance optimization;Under specific circumstances, such as outdoor requirements, can choose the relevant surface treatment model.
2. With a frequency range of 80MHz~100GHz, it has good performance of vertical incidence, oblique incidence, scattering and transmission attenuation.When the ratio of material height to working wavelength d/ lambda is 0.3, 0.7, 2, 6, and 16, the maximum vertical incident reflectance Rw reaches -15~ -20db, -25~ -30db, -35~ -40db, -50db, and -60db, respectively.Within 30° of oblique incidence, Rw changes little.As the incidence Angle increases, Rw begins to deteriorate.At 60°, Rw is 10~15dB less than normal incidence.Horizontal polarization is more obvious than vertical polarization.
3. The product meet the U.S. navy lab report NRL8093 Ⅰ (1977) test, withstand voltage test Ⅱ difficult, the spread of flame and the experiment Ⅲ smoldering requirements, its high oxygen index, and through the fire simulation experiment, and lasting flame retardant effect.Operating temperature -50℃~80℃, short time 100℃~120℃.Power capacity 1KW/m, short 1.5KW/m.
High power flame resistant absorbing material, is a kind of flame retardant, carbon black impregnated non-woven fabric as the base material made of hollow microwave broadband absorber, currently mainly used in the microwave anechoic chamber and cover the anechoic chamber test equipment.If it is used to cover the reflectors in the test environment under the conditions of vertical incidence and oblique incidence, it can reduce the background noise, eliminate the clutter interference and improve the test accuracy.
Product performance:
Electrical properties:
Polyurethane foam is a kind of material with the best absorbing effect in microwave wide band because of its small parameters, small surface reflection and bulk absorption.
Flame retardant:
It meets the requirements of NRL8093, gb8624-b2, din4102-b2, iso11925-2, UL94 and other standards.Oxygen index ≥28%;Operating temperature: -50℃~80℃, up to 100℃ in a short time;The power capacity is 1KW/m, short 1.5kw /m.
Environmental protection:
Inorganic raw materials, non-toxic and odorless, no harmful gas release, strictly controlled from the source;The finished products meet the RoHS environmental requirements of the European Union;The finished product is halogen-free;The formaldehyde emission of finished products reached the standard of gb18580-2001e1.The air quality in the microwave anechoic chamber meets the GB/ t18883-2002 limited standard.
Physical property: evenly impregnated, absorbent components adhere firmly;Appearance color uniform and customizable color;High consistency of specifications, beautiful appearance, not hanging tip;Soft, strong mechanical extrusion resistance, resilient.
Application:
1. Construction of microwave anechoic chamber, absorbing screen and microwave anechoic chamber for various purposes;Generally not higher than a few small sa-100 specifications can also be used in equipment;Materials of different types, heights and structures can be selected flexibly according to the shape, performance requirements and different parts of the anechoic chamber.According to the customer demand design performance optimization;Under specific circumstances, such as outdoor requirements, can choose the relevant surface treatment model.
2. With a frequency range of 80MHz~100GHz, it has good performance of vertical incidence, oblique incidence, scattering and transmission attenuation.When the ratio of material height to working wavelength d/ lambda is 0.3, 0.7, 2, 6, and 16, the maximum vertical incident reflectance Rw reaches -15~ -20db, -25~ -30db, -35~ -40db, -50db, and -60db, respectively.Within 30° of oblique incidence, Rw changes little.As the incidence Angle increases, Rw begins to deteriorate.At 60°, Rw is 10~15dB less than normal incidence.Horizontal polarization is more obvious than vertical polarization.
3. The product meet the U.S. navy lab report NRL8093 Ⅰ (1977) test, withstand voltage test Ⅱ difficult, the spread of flame and the experiment Ⅲ smoldering requirements, its high oxygen index, and through the fire simulation experiment, and lasting flame retardant effect.Operating temperature -50℃~80℃, short time 100℃~120℃.Power capacity 1KW/m, short 1.5KW/m.
