Quality control is a procedure or set of procedures intended to ensure that a manufactured product to meet the requirements of the customers. To meet the customer requirement the finished products should be inspected in order to assure that it does not contain any faults. In making a decision regarding acceptance inspection for any particular purpose, it may be desirable to consider not only various possible systems or procedures of acceptance sampling by attributes but also the alternatives of [1] no inspection at all, but imposition of a requirement that statistical evidence of satisfactory quality be provided with each lot; [2] 100% inspection; and [3] possibilities of acceptance sampling by variables. This paper is focused on the comparison of different AQL which is fundamental for quality control in final inspection process. This study was entirely conducted in a garment manufacturing company for authentic data. Similarities and dissimilarities in inspection parameter for AQL 2.5% and 1.5% were obtained by observing and analyzing collected data. The research work carried out here may be considered as a significant step to inspection process regarding quality confirmation.
Green composites using thermoplastics and thermosets got immense popularity long back when it newly introduced to the industry due to diminishing reliance on oil-based or gasoline materials, which causes numerous environmental problems. In this paper, bio-composites mechanical, chemical, thermal, and degradation properties of hybrid jute and coir fibers reinforced polylactic acid (PLA) investigated. Throughout the fabrication procedure of biocomposites, jute, and coir fibers characterized into three different categories raw, alkali-peroxide, and alkali-silane combined chemical treatments followed a design containing in a total of ten optimized samples. Jute and coir fibers were mixed with a solution of polycaprolactone (PCL) for better fiber-matrix adhesion prior to fabrication. The mechanical properties of alkali-silane treated reinforced fibers biocomposites improved compared to untreated fibers, which exhibited for fiber contents 40% an increase of respectively 32.8% by tensile strength 25.95% by tensile modulus, 24.58% by flexural strength, 23.64% by flexural modulus, and 26.08% by impact strength. Besides, moisture absorption, thickness swelling, thermal stability (TG), and surface chemistry analysis (FTIR) properties investigated, according to fiber-matrix contents ratio, hot-pressing time, temperature, and pressure to identify the effect of biocomposites due to chemical treatments. Moreover, the fiber surface effect of chemical treatments and interfacial adhesion morphologies observed using SEM. Eventually, alkali-silane combined optimized samples demonstrated the most desirable result in every aspect. In addition, a 90 days burial degradation performed to see the degradation flow of the biocomposites.
High-moisture regains nature of cellulosic fibers considered one of the critical drawbacks for jute-based applications. To minimize this by developing better interfacial adhesion, a hydrophobic nonwoven wet-laid glass fiber sheet used the woven jute fabric in this experiment. For this purpose, woven jute fabric was categorized into untreated, silane, alkali, and alkali-silane combined treatment then compounded with the solution of polycaprolactone (PCL). Fabrication of composites performed the following sandwich method based on different hot-pressing time with temperature for detecting a prominent fabrication parameter. Surface treated jute fibers characterized using FTIR spectroscopy. Hence, the mechanical and thermal properties of composites were investigated to find the consequence of chemical treatments into woven jute fabric. Alkali-silane combined chemical treatments resulting in improved 48.38% of tensile strength over untreated optimized composites. Scanning electron microscope (SEM) used for displaying interfacial adhesion between fiber and polymer matrix. Besides, further investigation demonstrated due to the combined chemical treatment of alkali-silane optimized composites significantly enhanced the thermogravimetric (TGA) stability in contrast to other composites.
In the world, there are more than 370 million indigenous and tribal people with especial culture and traditions. The Chakma's is one of the groups of indigenous people dwelling Chittagong hill tracts in Bangladesh. Chakma's has its own culture, tradition, literature, and costume designs. The design costumes of the Chakma's play an essential role. The Chakma's preserved their textile design in "Alam". Alam is a kind of cloth embroidered with various designs carrying the heritage of the Chakma. The use of Alam began approximately 500 years ago. All used clothing in Chakma society is weaved manually in the back-strap loom, which is generally very time-consumingthis limits its design aesthetics and universal use. Because of globalisation, the use of the traditional design of Chakma's are threatened today. Till today in our country and overseas, no attempts were taken for research of the traditional Chakma's design. The purpose of this research is to upgrade and digitise Chakma's designs. Furthermore, efforts were made for the automatization of the traditional process to preserve traditional Chakma's designs. In this study analysis of the fabric designs, pattern structure, colour applications of the traditional Aalam design were constructed using small prototype Rapier loom technology. We found that most of the single designs of the Alam were possible to weave in small prototype modern loom. On the other hand, intricate designs were not possible to weave in small prototype loom but are possible in the jacquard loom. The key idea is to establish an approach to modernise the traditional weaving process in order to make it convenient, economical and less time-consuming.
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