|
1．Q: What is the drier ,
what is its principle of picking up the moisture ?
A: The drier is that one kind absorbs getting rid of water
pharmaceutical of moisture from the atmosphere, dry principle of it to
absorb among one's own structure or absorb moisture son and change their
chemical constitution through physics way moisture son through chemical
way, turn into another kind of material.
2．Q: Which are the main kind of the drier ?
A: There are five kinds of typical drier products mainly in the drier
trade at present:
1)Silica gel drier - backbone to two oxidize silicon , sublimate and
process and become granular or pearl by natural mineral process. As
drier, capillary structure of it (2 As on average. )Have good affinity
to the moisture son. Silica gel most suitable to leave room temperature
(20~32) on environment, high and wet (60~90%), it can make relative
humidity of environment reduce to 40% about.
2)The clay drier(covered with and takes off stones)- the appearance form
is a grey glomerulus, most suitable for picking up the moisture in the
environment under 50 degrees Centigrade. As temperature is higher than
50 degrees Centigrade, clay " turns on the water " the degree is greater
than the " absorbing water " degree . But the advantage of the clay lies
in the price is cheap.
3)Molecular sieving drier - it whether artificial synthesis have better
drier product of person who absorb to moisture son. The size of aperture
of the molecular sieving can be controlled through the difference of
processing technologies, besides absorbing the aqueous vapor, it can
also absorb other gas . Under the high-temperature situation above 230
degrees Centigrade, it can still be very good to hold the moisture son.
Advantage : Have a good adaptability. Shortcoming: The picking up the
moisture rate is low, the environmental protection difference (not
degradative).
4)Mineral drier - weighing apparatus yuans of mineral drier made up of
several kinds of natural mineral, the appearance is an ashen glomerulus.
It is nonpoisonous and harmless, is the degradative environmental
protection type drier . The picking up the moisture rate is more than
50%, it is twice of the ordinary silica gel.
5)Fibre drier - weighing apparatus yuans of fibre drier exquisite to
succeed by special craft by pure natural plant fibre. Among them,
especially cover fibre drier slice of membrane, convenient to be
practical, do not take up the space . Its ability of picking up the
moisture is up to 100% of the one's own weight, it is incomparable to
ordinary drier . In addition, this product safe hygiene, moderate price,
it is a lot of ideal choices of living beings, health food and
medicines.
3. Q: Which are the main wrappings of the drier ?
A: The drier in common use charters the material to divide into mainly
both at home and abroad: Keep in touch with the kind of paper (the
filter paper), there is no one that spins cloth , compounds in paper,
wove paper and American E. I. Du Pont de Nemours & Company to specially
defend strong (Tyvek)ly at home.
Filter paper can used in light silica gel drier packaging of
specification, used in packaging it covers with to be enough and easy to
leak the powder in intensity to take off stone, ventilative and good;
Compound getting ventilative and relatively poor paper , cause and pick
up the moisture slowly, is not generally fit for the dampproof packaging
of the electronic product; Not having certain intensity to spin cloth,
there is ventilative the fine one , but used in the packaging and
covered with and takes off stones, it is apt to let out the powder; It
is good that the wove paper is ventilative, it is good that the
intensity is high, dustproof, suitability wide, price than ordinary to
compound paper high, but far lower than Du Pont paper, it is the ideal
choice of the medium-to-high grade bag material; Defend getting strong
to can use various kinds of ideal material that drier pack for , have
intensity to be high, able to bear and fold, able to bear and tear,
defend static, getting ventilative getting kind characteristic
specially, still there is the excellent one that is able to bear the
climate and resist chemistry, there is not dust that is designed, is
used for packing the drier , there is ventilative the good one , there
are enough intensity and beautiful printing result , the only
shortcoming is that the price is high.
4. Q: How to confirm the consumption of the drier?
A: The consumption of the drier depends on the factors in many aspects:
The size of the dry space, the performance of the wrappings , pack the
environment of preserving of articles, the atmosphere condition while
sealing, the quality guarantee period packing articles, sealed degree
packed,etc.. When we design drier consumption for the customer, we make
the best reply after needing to understand the above situation in
advance.
5. Q: What is the degree of saturation , what is the balanced capacity?
A: Though they are two kinds of concepts , to the drier, come to say
from meaning of practising that mean that does not pick up the moisture
again. The degree of saturation means that the drier has already been
sucked fully, even there is a lot more of aqueous vapor, it is unable to
absorb . It means that the drier siphons away enough moisture from the
air to balance the capacity, make atmosphere aqueous vapor hold ability
exceed the ability of absorbing to the aqueous vapor of drier correctly.
At this moment, the relative humidity that increases more drier and will
not reduce this environment either.
6. Q: What is drier of a unit (unit) referred to?
A: The foreign and commonly used drier absorbs the unit. According to
the ability of absorbing of the drier: The drier of one " unit " is in
25 degrees Centigrade of balance temperature (RH =Under the condition
that 20%), the drier of one " unit " is in 25 degrees Centigrade of
balance temperature (RH that can absorb 3.00g aqueous vapor =Under the
condition on 40%), can absorb 6.00g aqueous vapor come and say one "
unit " cover with and take off stone drier equivalent to 33 grams
precise, one " unit " silica gel drier and molecular sieving equivalent
to 28, one " unit " weighing apparatus yuans of fibre drier equivalent
to 18 grams.
|
