กก
1: the sound insulation material, sound insulation mat comply with quality
law, so the weight of the product is very important, the case of
2mm products for 4kg/ square meters, the weight is normal, if
less than this standard too much, it will seriously affect the
sound insulation performance. Therefore, the buyer of the
product, you can weigh the weight. Proportion of less than 2,
the majority of poor quality products.
2:. sound insulation material, sound insulation felt must have
the flame retardant effect, the buyer may use the lighter to
make the test.
3: sound insulation material, sound insulation felt better
flexibility, 180 degrees will not be broken. After the break has
obvious cracks, substandard products.
4: noise felt, there are environmental protection requirements,
there is a special smell of products, are usually fake products.
5: the sound insulation felt, the sound insulation effect is not
good another important factor is the elasticity. In most cases,
with soundproof blanket of gypsum board, calcium silicate board
or cement pressure plate etc use, good elasticity can be
alleviated by sound waves hard plate vibration, so as to
increase the sound volume effect. Simple way to test the
soundproof felt elasticity is will cut into two or three cm wide
soundproof felt strips, and then with his hands stretched, if it
can be easier to elongate and slack length after restitution,
then congratulations to you, this is a good sound insulation
mat; if pull off or elongated cannot restore, then unfortunately
you cheated.
According to these methods, it should be very easy to
distinguish the pros and cons of the noise felt. If you are
still not sure, it is recommended that you collect a few kinds
of different manufacturers of noise felt a comparison of the
sample is clear at a glance.
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