HVAC SYSTEM in production


(KISHAN NAYAK ) #1

In rainy season humidity in atmosphere 80% .without any humidifier how PPA humidity maintain below 60%?


(Manoj Singh) #2

As for all polyamide based compounds, moisture absorption is a key parameter to be considered in polymeric material selection in the design process of final parts. When polyamides are exposed to humidity/water, different effects can occur. First
result of the moisture absorption on polyamide is a dimensional change because of swelling processes.
This absorption of moisture affects also some
mechanical properties of polyamide compounds. In particular, in nylon, the moisture acts as plasticizer.
This means that properties like strength, stiffness, elongation and toughness are affected. The extent of these variations is related with the amount of moisture absorbed.
The plasticizing action of moisture can beAs for all polyamide based compounds, moisture
absorption is a key parameter to be considered in polymeric material selection in the design process of final parts. When polyamides are exposed to humidity/water, different effects can occur. First result of the moisture absorption on polyamide is a dimensional change because of swelling processes.
This absorption of moisture affects also some
mechanical properties of polyamide compounds. In particular, in nylon, the moisture acts as plasticizer.
This means that properties like strength, stiffness, elongation and toughness are affected. The extent of these variations is related with the amount of moisture absorbed.
The plasticizing action of moisture can beAs for all polyamide based compounds, moisture
absorption is a key parameter to be considered in polymeric material selection in the design process of final parts. When polyamides are exposed to humidity/water, different effects can occur. First result of the moisture absorption on polyamide is adimensional change because of swelling processes. This absorption of moisture affects also some
mechanical properties of polyamide compounds. In particular, in nylon, the moisture acts as plasticizer.
This means that properties like strength, stiffness, elongation and toughness are affected. The extent of these variations is related with the amount of moisture absorbed.
The plasticizing action of moisture can beamount of moisture absorbed.
The grade of crystallinity is an important parameter to be considered in the evaluation of absorption capacity of plastics: the extent of moisture absorption is closely related to crystallinity. a filled polyamide will absorb less moisture than the unfilled one and the amount of this variation is proportionally to the content of glass filler.


(Manoj Singh) #3

polyphthalamide (PPA) is an aromatic polyamide .


(KISHAN NAYAK ) #4

Sorry sir PPA means powder processing area


(Manoj Singh) #5

Dehumidifier is must for dry powder injection filling area or powder processing area.


(Sajjad Ahmad) #6

limits of humidity in dry fiiling inj area?


(Manoj Singh) #7

RH should not be more than 30% in case of dry injection. in some hygroscopic product <18 % RH is required.


(Sajjad Ahmad) #8

dry powder injectable filling materials are alwyas ready to use?
mean we just open containers in sterile are n start filling.


(Manoj Singh) #9

yes u r right.


(Sajjad Ahmad) #10

any idea about type of excepients used in ready to use dry powders apart from API.