国产精品一区二区久久国产抖音|中文字幕人妻有码无码视频|超虎粉嫩自慰观看新朋友|中文字幕不卡二区亚洲

1, polyester fiber is sound-absorbing board product is mainly used in indoor (metope, ceiling)

2, polyester fiber is sound-absorbing board is a porous material, magnified three hundred times as much to talk, we see the polyester fiber is sound-absorbing board is porous structure, it is because these cavity, polyester fiber is sound-absorbing board can sound-absorbing (voice after polyester fiber sound-absorbing panels in cavity formed by sound energy into backflow, heat).

3, decoration plasticity, use common wall paper knife, it can cut.

4, polyester fiber materials, what is polyester fiber (PET), polyester fiber material is oil chemical materials, commonly known as the polyester, is in the state of wire drawing, color after pressing into boards.

5, has sound-absorbing, fire prevention, environmental protection, noise reduction, moistureproof, characteristics, sound-absorbing, fire prevention, environmental protection for instructions

(1) polyester fiber is sound-absorbing board sound-absorbing mainly reflects in sound-absorbing noise reduction coefficient, according to GB/T20247-2006, average noise reduction coefficient (NRC) of 0.85 above, average absorption coefficient (100 HZ ac-4 KHZ) was 0.72. In the high frequency band, for better effect.

(2) polyester fiber is sound-absorbing board for national fire protection GB8624 B1 level (1997) national fire protection has four grade level A: doesn't burn. (like stone, steel, etc) B1 level: flame retardant. (mainly refers to fire left the fire spread speed slow) B2 class: flammable (as long as it's wood, etc.) B3 level: flammable (alcohol, fuel)

(3) environmental protection level is divided into: E0 level, E1, E2 class

Polyester fiber is sound-absorbing board far accord with a country (the gb18580-2001) E1, formaldehyde to release a quantity to < 0.1 (mg/l), index more than 1.5 mg/requirements (l) , which can be directly used for indoor

Fields: home cinema, hotel, studio, the music room, KTV, bars, theaters, meeting rooms, multi-function hall, the indoor stadium, etc