IOSR Journal of Polymer and Textile Engineering (IOSR-JPTE) e-ISSN: 2348-019X, p-ISSN: 2348-0181, Volume 6, Issue 2 (Mar. - Apr. 2019), PP 56-61 www.iosrjournals.org DOI: 10.9790/019X-06025661 www.iosrjournals.org 56 | Page Impact of Beater Speed of Coarse Cleaner on the Quality Parameters of Blowroom by Using Regression Analysis Md. Rashel Hawlader 1 , Sraboni Ahmed 1 , Faisal Rahman 1 , Lutfor Rahman Shanzid 2 , TanzeenaRefat Tumpa 3 1 (Department of Textile Engineering, Northern University Bangladesh, Bangladesh) 2 (Department of Textile Engineering, Ahsanullah Institute of TVET, Bangladesh) 3 (Department of Textile Engineering, European University of Bangladesh, Bangladesh) Corresponding Author: Md. Rashel Hawlader Abstract: An effective cotton spinning requires efficient opening & cleaning of raw material. The beating point of coarse cleaning machine (Uniclean) influences neps generation, fiber length and short fiber content. By keeping this view, to change various setting, Cleaning Intensity (C.I) and Relative Amount of Waste (RAW) of cleaning machine which affects fiber rupture, cleaning efficiency, good fiber loss percentage in waste. The effect of beater speed of coarse cleaner was studied for quality characteristics of cotton. The results in respect of neps generation, fiber length and short fiber content showed highly significant differences in the mean values for different combination of settings as well as cleaning segments. --------------------------------------------------------------------------------------------------------------------------------------- Date of Submission: 16-04-2019 Date of acceptance: 01-05-2019 --------------------------------------------------------------------------------------------------------------------------------------- I. Introduction The basic purposes of blow-room are opening, cleaning, mixing of cotton without increasing fiber rupture, fiber neps and broken seed particles and extracting more amount of trash without good fiber loss. The reduction of trash content which is necessary for improving cotton grade and unfortunately results in a higher neps content level. It is clearly noticeable that blowroom cleaning efficiency is increased with the increase of fiber openness. [1] In this project, emphasis given on Uni-clean machine setting change with respect to Cleaning Intensity and Relative Amount of Waste at various beater speed and grid angle.Cleaning Intensity and Beater speed is directly proportional. So, working with higher Cleaning Intensity can increase the fiber opening and thereby trash removal from feed cotton. At the same time higher beater speed also increases fiber stress, especially in case of longer, finer, cohesive but trashier in the mix. This can lead to excessive fiber rupture and nep formation. [2] Relative Amount of Waste (R.A.W.) is directly proportional to the grid bar angle. Higher the angle, wider will be the setting and correspondingly more waste gets extracted and vice versa. [3] If the amount of trash is increased, the degree of cleaning also increases & performance of cleaning efficiency percentages increase. [4] II. Literature Review Blow-room: The section where the supplied compressed bale is turned into a uniform lap of particular length by opening, cleaning, blending or mixing is called blow room section. It is the first step of spinning and consists of a number of machines. [5] The task of the blow-room line is to: • open the material into very fine tufts; • eliminate most of the impurities; • eliminate dust; • provide a good blend Basic operations in the Blow-room:  Opening  Cleaning  Dust removal  Mixing/ Blending  Even feed of material to the card