Rosin sizes stock temperature

High stock temperatures can have a negative effect on all the major size types, causing agglomeration of rosin types and hydrolysis of reactive sizes. 

Use a premix system or co-addition of rosin and alum to pre-form the rosin size precipitate before it attains the stock temperature. 

Stock temperature is, surprisingly, no more important for ASA sizing than for AKD and neither is as affected as rosin sizing (no alum chanislry/temperature problems). 

All of these effects are enhanced by other effects, such as high stock temperature. The lack of alum may also cause deposits at the presses and dryers, as the size precipitate will not be firmly anchored to the fibre and fines and can be removed, at both press and dryers, with fines and fillers. If there is also a chemical imbalance in the system, the fines and fillers can be removed at the presses. In this case, there will always be a high level of fmes/fiUer to rosin ratio. 

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