characteristics of Sound-absorbing cotton and non-woven and foam

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EVA, sound-absorbing cotton, non-woven, the basic knowledge of foam A. EVA pad design knowledge According to the
design needs of the pad density is also different, the corresponding hardness also changes, the general hardness
values ??between 150 ~~~ 650, The hardness of the tolerance is generally ¡À 3 ¡ã, EVA pad is environmentally
friendly materials, is the sixth category EVA cushion the use of the maximum temperature is generally 80 ~ 1200,
the use of EVA cushion when you pay attention to the use of humidity is generally 45% to 95% EVA pad tolerance is
generally larger, the greater the hardness of the larger tolerances can be small, ¡À 0.3, the hardness of the
smaller tolerances can be large EVA cushion on the back of more than rubber, plastic type 3212 oil glue, the
plastic thickness: 0.04mm EVA pad for the use of mostly before and after the seal between the shell, or hard
material into the bottom of the small supporting foot box. Two. Sound-absorbing cotton fire-resistant sound-
absorbing cotton for Yakangning's new products, imported products using advanced fiber materials refined. The
company has advanced production of elastic cotton and non-woven fabrics of imported machinery production
equipment, from Europe, the United States, Taiwan and the introduction of environmental protection and many other
requirements of the production process. One of the production-wave-absorbing cotton with the world's patented
products.

2 fire sound-absorbing cotton product structure for the vertical molding, vertical fiber network is a patented
manufacturing methods, products will be more flexible and sound-absorbing effect. Wave uniform row, the input and
output temperament when the sound quality uniform, consistent cycle, the sound is not turbid, natural sound,
permanent change. Sound-absorbing cotton with flame-retardant effect of their own, in the production process
without adding any chemicals. This product has passed the British fire certification (certification: TXT542808)
and the United States, California fire certification (certification number: TXT536672) and Switzerland
environmental certification. Fire-resistant sound-absorbing cotton characteristics: environmental protection
renewable, non-toxic, pest control, moisture, sound-absorbing effect.

1. Long fiber pure wool US ABS audio dedicated long fiber pure wool, is the manufacture of advanced speakers the
best sound-absorbing damping material. It can effectively absorb the elimination of the standing wave inside the
speaker, significantly improve the dynamic and sub-clarity of the speaker, so that low-frequency more vigorous,
more clear midrange. In recent years, the wool has been re-branded in Europe and the United States super
speakers, at high prices to use in its most expensive speaker system, including: Dynaudio (supreme), the United
Kingdom msp, but more widely is still being perfected Of music and audio enthusiasts to use for their beloved
tusk tonic, with a view to a higher level. Each package of ABS wool weighs about 1/2 pounds, can be filled about
1/2 cubic feet (equivalent to 15 liters) of the volume of the sound box. Guests can be the standard. Determine
the amount of material used. As for the construction method, it is very simple, just unravel the wool loose,
loose on the box can be: Another method is to spread the wool box wall, thickness of 3 to 10 cm, covered with a
thin layer Of the porous breathable fabrics such as gauze and the like, and then press the nail to fix it. As we
all know, wool is not harmful to human health, this feature for the manufacture of bass reflex speakers is still
valuable. Because if the use of sound-absorbing material will cause discomfort, coupled with the incorrect laying
method, the box slightly sound-absorbing fiber, may not withstand the use of high-speed air impulse generated by
the speaker, fly through the reflection hole pollution indoor Environment, if inhaled into the human lung,
certainly not longevity. So, whether it is to make you La
4 sound better, or for the sake of you and your family's health, the choice of ABS wool, is always a wise move.

2. Damp-proof centrifugal glass wool is the raw material of quartz powder melting, centrifugal injection method
made of fiber, and then through the collection, curing, cutting and other technology, made of a variety of glass
wool products. This product is a good sound-absorbing material, more efficient insulation, heat and other
performance. Anti-corrosion, moisture-proof, non-aging, no mold, no borer, good elastic restoring force, small
linear expansion coefficient, low thermal expansion coefficient, low thermal conductivity, good chemical
stability, Compressible packaging transport, construction performance, and can cut processing, no on-site loss,
no harmful gases, long-term use of the same performance and sound absorption coefficient. In the international
audio products in the high utilization rate, as the sound-absorbing material in the project to be widely used to
improve the low-frequency sound absorption performance, can be appropriately increased the number of moisture-
proof centrifugal glass wool is the traditional sound has been considered the best sound material. Damp-proof
centrifugal glass wool sound absorption performance (thickness 50mm 24kg / mxmxm)

3. Flame-retardant polyurethane acoustic foam plastic sound-absorbing cotton flame-retardant polyurethane
acoustic foam is a new type of sound-absorbing material, with light weight, moisture resistance, flame retardant,
can be cut forming, construction and installation advantages. In the back of the foam coated with adhesive, foam
sound-absorbing cotton can be directly attached to the need for sound absorption of the place, the construction
is very convenient.
Flame-retardant polyurethane acoustic foam sound-absorbing cotton is widely used in building acoustics and noise
control engineering, such as: mechanical and electrical products acoustic enclosures, sound-absorbing screen
sound-absorbing layer, air-conditioning muffler, plant noise absorption and theater, auditorium, Radio and
television recording studio and other projects in the control reverberation time, sound absorption within the
sound box and improve indoor sound quality and so on. 4. Black gold steel shock-absorbing steel grit Black gold
steel shock-absorbing steel grit, derived from Japan's high pure natural ore, the strict multi-filter and
screening, non-impurities, high degree of insolation, with non-magnetic, non-oxidation and other characteristics.
Particularly suitable for: speakers, speaker top, speaker stand, audio rack and applied to any equipment on top,
can effectively reduce the excess sales of undesirable vibration, the overall performance of the equipment more
vivid, more alive sense, the background more Quiet, low-frequency more powerful, is the traditional choice for
senior enthusiasts. 3. Non-woven 1). The thickness of non-woven are: 0.1MM 0.2MM 0.5MM 2). Non-woven and PVC
network connection there are three: printing glue, adhesive, glue (1). 3M glue. (2). Beijiao: ordinary double-
sided adhesive, 3M467 double-sided adhesive 3M468 double-sided adhesive # 5760 double-sided adhesive T400 double
-sided adhesive (3). Spraying: 3M77 spray. And the iron network connection, mode of operation is only one kind of
spray, that 3M77 spray..
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