Blow Room Processing Of Material Tends To Increase Bp Level By

Cotton is a natural fibre and it absorbs a lot of moisture from atmosphere.

Blow room processing of material tends to increase bp level by.

Blow room is the only area where the high trash cotton content can be cleaned. It is important to arrive the product standards considering the end use requirement for card sliver. The process wise analysis refers to nep increase at blow room and nep reduction at card. Trails have been carried out with two different noil percentage 9 and 10 to make 80 s ne count yarn with the same process parameters from blow room to ring frame.

Truetzschler machine from germany has enough cleaning points in the blow room. So the machine should have enough cleaning points. The process wise analysis refers to nep increase at blow room and nep reduction at card. Shuttle noise level increases by about 1 5 2 0 dba.

This sketch represents the blow room line suitable for processing all range of counts. Alan and alexander 1988 pointed out that processing of fibres tends to produce neps through a stress. It is important to arrive the product standards considering the end use requirement for card sliver. This highly compressed cotton firbe need to be open at first as a part of yarn manufacturing.

In case of low grade cotton coarser mixing below 40s trash in low grade cotton is high. Almashouley 1988 reported that inadequate settings and inadequate feedings are the sources of variation in weight per yard of lap. And there are 1 5 to 7 trash in cotton bale which is also needed to be removed before further processing. The maximum noise level is observed at the front of the machine because of the movement of siey which causes air turbulence.

Cotton fibre is compressed in a bale of 200 to 250 kg. This tends to increase the percentage of short fibres and the level of neps. As the 100m speed increases the noise level also increases significantly due to the higher impact forces acting on the different parts of a loom. This process of opening cleaning is knows as blow room process.

For example indian cotton generally has a trash level of 4 5. In comparison the pin has a smooth round surface and a spherical tip which opens the fibres through a gentle untangling action. The thrash contained in the fibre supply also tends to disintegrate into micro dust due to the saw tooth action. The fibre processes well with appropriate level of moisture gained from atmosphere.

Once the level of card sliver neps required are decided the level of neps required at blow room material and target level at mixing can be arrived. Cards together with the variation in blow room a major part of this variation can be attributed to blow room.