Md Sohanur Rahman Sobuj

Absorption of infra-red radiation method

Absorption of IR radiation method

January 21, 2017 Md Sohanur Rahman Sobuj 0

1.90K

Infra-red (IR) spectroscopy is one of the most common and widely used spectroscopic techniques. When electromagnetic waves interact with matter, they are scattered and absorbed. Infrared spectroscopy, radiation with wavelengths between 1 -15 μm is absorbed at certain characteristic frequencies, which yield structural information.

Textile Physics-1

Crystalline and Amorphous Structure of Fiber

January 21, 2017 Md Sohanur Rahman Sobuj 0

13.64K

Amorphous region of the fiber is defined as the region of the fiber where there is no longer the order of chain molecules. The polymer chains are randomly placed in amorphous region. As a result, there is more air space in the amorphous fiber.

Apparel Engineering

Bar tack Sewing Machine II Study on bar tack sewing machine with thread path diagram and sample production.

August 26, 2016 Md Sohanur Rahman Sobuj 0

5.04K

Industrial bar tack machine is actually a lockstitch machine group. By this machine, a very high density lockstitch is produced in very short length for increase the strength of that particular place. These machines are used for sewing both woven and knitted garments. For light thickness fabrics, needle size should be lower and heavy thickness fabric, height needle size should be used.

Apparel Engineering

Different Parts of a Sewing Machine and Their Function

July 14, 2016 Md Sohanur Rahman Sobuj 0

23.11K

A sewing machine is a textile machine used to stitch fabric, paper, card and other material together with thread. It is an important part of the garment manufacturing industry as well.They are different types of sewing machines that are available in the market. The basic functionality of the machine is one and the same.

Fiber length

Span Length

June 19, 2016 Md Sohanur Rahman Sobuj 0

10.92K

x % Span length is the distance spanned by x %of fibers in the specimen being tested when the fibers are parallelized and randomly distributed and where the initial starting point of the scanning in the test is considered 100%. This length is measured using "Digital Fibrograph‘.

Fiber length

Fibrograph Method

June 19, 2016 Md Sohanur Rahman Sobuj 0

7.03K

The original idea of the photoelectric scanning or Fibrograph method has been developed by Hertel in 1940 for testing cotton lint. This test method is much faster than the array method and is used widely in ﬁber laboratories for measuring fiber length and length distribution.

Fiber length

Effective Length of Cotton Fiber

June 19, 2016 Md Sohanur Rahman Sobuj 0

3.61K

The effective length is the upper quartile of the ﬁber length distribution obtained by ignoring short ﬁbers whose length is below half the effective length.

Fiber length

Length parameters of cotton fibers

June 19, 2016 Md Sohanur Rahman Sobuj 0

13.65K

The most frequent length in a fibrous sample is called staple length. Staple length is one of the most important factors of cotton quality because both ﬁber ﬁneness and fiber tensile strength are associated with staple length. The longer staples are usually finer and stronger than the shorter staples.

Fiber length

Fiber length measurement

June 18, 2016 Md Sohanur Rahman Sobuj 0

8.06K

The ﬁber sorter is an instrument which enables the sample to be fractionalized into length groups. The Baer sorter, the Shirley comb sorter, and the Suter-Webb sorter are the most popular method of the fiber sorter. Basically, the operation involves four main steps: Preparation of a fringe or tuft with all ﬁbers aligned at one end. The separation or withdrawal of ﬁbers in order of decreasing length. The preparation of a sorter diagram by laying the fibers on a black velvet pad in decreasing order of length, the ﬁbers parallel and their lower ends aligned along a horizontal base line as shown in Figure. The analysis of the sorter diagram.

Fiber length

Fiber Length and Length Distribution

June 18, 2016 Md Sohanur Rahman Sobuj 0

5.75K

After fineness, length is the most important property of a fiber. The length of cotton is directly related to its spinning performance. Knowledge of fiber length is necessary to manufacture a yarn of specific size on ring spinning system and typically longer fibers are used to manufacture fine yarns. Longer fibers are generally more uniform, finer, and stronger than shorter ones.