Introduction to Textile Testing and Quality Control.pptx

This PDF provides a clear and concise introduction to TTQC (Total Textile Quality Control), focusing on its role in ensuring consistent product quality in the textile industry. It explains the fundamental principles of TTQC, its objectives, and its importance in every stage of textile production — from raw material selection to final fabric inspection.

Key topics include:

Definition and concept of TTQC

Importance of quality in textile production

Objectives and benefits of TTQC

Steps and methods used in textile quality control

Role of TTQC in achieving customer satisfaction and competitiveness

This document serves as a helpful resource for textile engineering students, professionals, and anyone interested in understanding how quality is maintained in the textile sector.

1. What is Testing? 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles The determination by technical means of properties; performance; or elements of materials, products, services, systems, or environments which involve application of established scientific principles and procedures. Critical examination of the quality, composition, or properties of a material, usually involving standardized test procedures . Technical operation that consists of the determination of one or more characteristics of a given product, process or service according to a specified procedure. 1

2. What is Quality? 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles An attribute, property, special feature. The nature, kind or character (of something); hence, the degree or grade of excellence, etc. possessed by a thing. ISO 8402-1986 standard defines quality as "the totality of features and characteristics of a product or service that bears its ability to satisfy stated or implied needs’’. “Quality is about meeting the needs and expectations of customers” Quality means the customer satisfaction. Key aspects of quality for the customer include: Good design – looks and style Good functionality – it does the job well Reliable – acceptable level of breakdowns or failure Consistency Durable – lasts as long as it should Good after sales service Value for money 2

3. 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles Control To check or verify, and hence to regulate. Without skilled and experienced technologists ‘control’ loss its meaning actually. Quality Control Quality control is the checking, verification, and regulation of degree of excellence of an attribute or property of something (textile). Properties such as linear density, evenness etc must be well defined. Quality in the textile trades might perhaps be defined as the degree of conformity to a specification, the specification itself having been drawn up with the object of providing an article which has suitability for an end use. ( Kenyon ) Quality control is a wide subject and covers all those factors which help to ensure that the product produced is of desired quality. ( Newbery ) Newbery’s definition emphasis on factors where as Kenyon’s definition says degree of conformity. 3

4. 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles On Line Quality Control: On line quality control occurred in the production line with sensors and data systems. Such as, determination of periodic variation of yarn, determination of yarn hairiness etc. Off Line Quality Control: Off line quality control occurred in the testing lab other than production line. Such as yarn count testing, fiber testing, gsm calculation etc. 4

5. 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles 5

6. The Objectives of Quality Control 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles I. Checking and Selection of raw material: The incoming material is checked for the required properties so that unsuitable material can be rejected or appropriate adjustments made to the production condition. II. Monitoring Production: Production monitoring involves testing samples taken from the production line. Its aim is to maintain, within known tolerances, certain specified properties of the product at the level at which they have been set. A quality product for this purposes is defined as one whose properties meets or exceeds the set specifications. This step can be termed as process control. 6

7. The Objectives of Quality Control ( Cont …) 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles III. Assessing the final product: In this process the bulk production is examined before delivery to the customer to see whether it meets the specification or not. By default it is done after the material being produced. It therefore can not alter the production conditions. In some cases selected samples are tested and in other cases all the material is checked and steps taken to rectify faults IV. Investigation of faulty material: Investigations of faults involve the determination of which party is responsible for faulty material in the case of a dispute between a supplier and a user, especially where processes such as finishing have been undertaken by outside companies. Work of this nature is often contracted out to independent laboratories who are then able to give an unbiased opinion 7

8. The Objectives of Quality Control ( Cont …) 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles V. Product development and research The results of testing in research help the researcher to decide which rout to follow next, what appears to be sound theory etc. In this way an improved product or a lower-cost product with the same properties can be provided for the customer. VI. Process development Process development may be considered as a form of applied research. The experimental work may be carried out by research institutes. Process development offers higher profit with optimum production and quality by reducing time and manpower. The process development is carried out through investigation into better, cheaper and quicker methods of material conversion. 8

9. The Objectives of Quality Control ( Cont …) 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles VII. Specification tests There has been a growing demand in recent years for the production of textiles to meet specifications. The advantages can be noted as i ) prevention of deterioration in quality using inferior raw materials, ii) the production of goods of known performance and iii) the opportunity for a manufacturer to be informed exactly what is required by the customer . VIII. Customer reputation It is known that some form of testing is required at every stage of manufacture so that the finished product will prove satisfactory to the buyer and consumer. Consumer satisfaction enhance the reputation of manufacturer which subsequently lead to repeat orders and continued prosperity. . 9

10. 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles The key factors to control quality Quality and the Control of Quality are governed by 3 key factors stated as 3 ‘M’s. Men, Materials and Machines. Men: Production level Maintenance and other levels Testing level They require a technical know how on the job that they do, how a sample is collected, which testing procedure will be carried on, etc. Management level: A successful coordination of all the operations, selection and training of man power. The knowledge of properties of raw material for a particular end product of desired quality. They must need sufficient knowledge to interpret the data and which decision can be made on test result. 10

11. 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles The key factors to control quality ( Cont …) Materials: The selection of raw materials is a key factor in the success or failure of quality of the next product. For example, fiber determines 80% of quality of yarn. Materials must be possessed the relevant properties with the final product. For example, long and finer fiber needed for Combing process as well as finer count. - Alternative materials of consistent properties are very useful when the preferred type is not either available or too expensive. Substitution may be accepted without seriously impairing the ‘degree of excellence’ of the product. 11

12. 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles The key factors to control quality ( Cont …) Machine: All the conversions and testing are performed by machines which must add or remove the quality on products. The selection of best machine does not mean that it produces best quality but optimum, because increasing quality decreases the production and increase the production cost. The machine which may be best from a technical viewpoint but not be an economical proposition. The availability of manpower can influence the decision. 12

13. 9/21/2025 Engr. Md. Zahid Murad Shuva Lecturer-SARSTEC , Directorate of Textiles Quality of testing Man Should have knowledge about the demand of market. Should have proper technical knowledge and skill to run the testing instrument. Should have idea about statistics for the representation of testing results. Should have skill about application of result . Should have idea about development of various technical matters . Self study: Importance of textile testing. 13