3.1 Technical principles
Materials and their applications
Materials and applications
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Students are expected to be able to name specific materials for a wide range of applications. They must also be able to provide detailed and justified explanations of why specific materials and combinations of materials are suitable for given applications with reference to:
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Understand the appropriate use of textile materials based on their physical and working characteristics such as:
Calculation of quantities of materials sizes and costs. |
Classification of materials
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Students must know the classifications of the following fibres, and be able to name examples that belong to each category:
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Methods for investigating and testing materials
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Students must understand how workshop and industrial tests are set up and what will be tested, measured and compared, including:
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Analysis of data obtained from testing. |
Performance characteristics of materials
Performance characteristics of fibres
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Students should be able to name different types of fibres. Students should be able to describe the performance characteristics of fibres, including:
Students should be able to explain the different fibres and their specific performance characteristics, including:
Students should be able to explain the shape and formation of fibres. They should understand and be able to discuss the different cross-sectional and linear formation of fibres that can occur in natural form, and those that can be engineered during synthetic and manmade fibre production. |
Understand how the physical shape and formation of fibres affect their performance. |
Fibre production. Students should be aware of, and be able to describe, the manufacturing processes used to make fibres in relation to the fibre source. With specific reference to staple fibres and continuous filament fibres, students should be able to demonstrate a knowledge of:
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Understand how fibre production can affect the fibre formation. |
Yarn production. Students should be aware of, and be able to describe, the manufacture of staple and filament yarns, single and plied yarns. |
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Mixture and blends. Students should know of the need to blend fibres to create aesthetic effects, performance fabrics, improved care and maintenance of fabrics. Students should be aware of, and be able to describe, the production processes associated with mixtures and blends, including:
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Hand and machine knitted methods. Students should be aware of, and be able to describe, the production processes associated with hand and machine knitting, including:
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Non-woven fabrics. Students should be aware of, and be able to describe, the production processes associated with non-woven fabrics, including:
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Special woven effects. Students should be aware of, and be able to describe, the production processes associated with woven effects with coloured yarns, including:
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Effects created using fibres and yarns. Students should be aware of, and be able to describe, the effects that can be created, including:
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Performance characteristics of yarns
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Students should know that fibres need to be made into yarns before they can be manufactured into woven and knitted fabrics. Students should be able to explain the performance characteristics of yarns, including:
Students should be able to describe the main yarn types, including:
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Performance characteristics of woven fabrics
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Students should be able to explain the main fabric structures of woven fabrics and be able to recognise these structures and typical end uses for a range of woven fabrics, including:
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Performance characteristics of knitted fabrics
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Students should be able to explain the two main structures of knitted fabrics and be able to recognise these structures and typical end uses for a range of knitted fabrics, including:
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Performance characteristics of non-woven fabrics
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Students should be able to understand and explain that non-woven fabrics are produced directly from fibres and have knowledge of typical end uses of non-woven fabrics. |
Smart materials
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Students should know and understand the term smart material. The effects that can be created by a range of smart materials and have knowledge of specific applications, eg in relation to fabrics for safety and novelty products. Students should be able to explain the suitability of smart materials for given applications making reference to how the material responds to external stimuli, including:
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Technical textiles
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Students should know and understand the term technical textiles. Students should be able to explain the suitability of technical textiles for given applications. Students should be familiar with the following technical textiles:
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Commercial names of fibres and fabrics
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Students should be able to name and describe popular names of natural, man-made and synthetic fibres and fabrics, including:
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Performance characteristics of fabrics
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Students should be able to explain the performance characteristics of fabrics, including:
Students should be able to explain the following terms, and how they relate to particular fabrics:
Students should be able to describe and explain the following, and how they relate to particular fabrics and their uses:
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Understand how the physical structure of fabrics affects performance. Understand that environmental factors can cause potential degradation of fabrics, eg with reference to colour fastness, weakening by sunlight and chlorine, inappropriate care routines. |
Students should know and understand how the properties of fabrics and their physical characteristics relate to their selection for specific fashion, clothing and textile products. This should include reference to both fabric construction and fibre/yarn content and the inter-relationship between them in determining the overall characteristic of a fabric. Properties and physical characteristics to include:
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Methods of joining and use of components
Seams
Content | Potential links to maths and science |
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Different seam types and their selection and use on different products taking into account the fabric type, effect to be achieved, efficiency of manufacture and after care of product. Students should have knowledge of the specific techniques required when working with different fabric types, eg knitted, checked, stretch, directional, sheer and patterned fabrics. |
Threads
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Including sewing threads, embroidery threads, and special effect
threads:
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Fusible fleece
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The use of heat-sensitive fleece such as Bondaweb ® when joining layers of fabric, eg in applique work. |
The use of fastenings
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The use of fastenings including buttons and buttonholes and loops, zips, poppers, clips, buckles, clasps, Velcro, D-rings, hooks and eyes, fabric and ribbon ties. Selection and application of fastenings for a range of fashion, clothing and textile products taking account of the intended use, fabric type, the effect to be achieved, efficiency of manufacture and after care of product. Students should have an awareness of the different types of fastening within each category, eg open-ended and invisible zips, flat and domed buttons. |
Trims
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Components and their appropriateness for a range of products
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Selection of the most appropriate component for a product taking into consideration the style, effect, fabric used, manufacturing considerations, safety in relation to user, availability and cost implications. |
Interfacings, underlinings, linings, interlinings
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Types and applications in relation to fabric weight and construction, and end use of product. Students should have knowledge of the different fabrics used and the reasons for choice in relation to specific products. |
The use of finishes
Fabric finishes
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The effects of finishes and the reasons they are needed in relation to:
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Mechanical finishes
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A range of mechanical finishes, including:
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Understand how the physical characteristics of fabrics can be modified by using mechanical finishes, eg trapped air acts as an insulator, air supports combustion, smooth fabric reflect light better than those with texture. |
Chemical finishes
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A range of chemical finishes, including:
Detailed knowledge of the chemicals involved and methods of application is not expected. |
Understand how the physical characteristics of fabrics can be modified by applying chemical finishes. |
Laminating as a finishing process
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That a laminated fabric is a membrane system made up of two or more layers, and
the principles behind how laminated fabrics work. Students should be able to describe
a range of laminated fabrics, including:
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Enhancement of materials
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Potential links to maths and science |
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Surface decoration – dyeing. Students should be aware of, and be able to describe, dyeing as a surface decoration, including:
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Understand the principles behind discharge and resist dyeing. Understand the degradation of fabrics in relation to colour fastness. |
Surface decoration – printing. Students should be aware of, and be able to describe, the steps that need to be taken in preparing a fabric for printing, including:
Students should be aware of, and be able to describe, printing as a surface decoration, including:
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Embroidery. Students should be aware of, and be able to describe, a range of hand and machine embroidery stitches. |
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Quilting. Students should be aware of, and be able to describe, the construction of quilted fabrics and reasons for their use. |
Understand the effects of trapped air on thermal insulation. |
Modern industrial and commercial practice
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Potential links to maths and science |
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Scales of production. Students should be aware of, and be able to describe, the different scales of production giving example products and specific manufacturing methods. Specific scales of production to include:
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The use of computer systems. Students should be aware of how computer systems are used to plan and control manufacturing, reduce waste and respond quickly to changes in consumer demand. Students should be able to explain the use of computer controlled systems in production, distribution and storage. Students should be able to explain the use of standardised and bought-in components made by specialist manufacturers. |
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Sub-assembly. Sub-assembly as a separate line of manufacture for certain parts of a product. |
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Global production. Students should be aware of and able to explain the positive and negative impacts of global production, including:
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Digital design and manufacture
Computer aided design (CAD)
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Use of datum points and geometry when setting out design drawings. The use of tolerances in dimensioning. |
Computer aided manufacturing (CAM)
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Students should be aware of, and be able to describe, how CAM is used in the manufacture of products. Specific processes to include:
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Calculating speeds and times for machining. |
Virtual modelling
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Students should be aware of, and be able to describe, how virtual modelling/testing is used in industry prior to product production. Specific processes to include:
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Electronic data interchange
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Students should be aware of, and able to describe, the use of electronic point of sales (EPOS) for marketing purposes and the collection of market research data. |
Production, planning and control (PPC) networking
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Students should be aware of, and able to describe, the role of PPC systems in the
planning and controlling of all aspects of manufacturing, including:
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The requirements for textile and fashion design and development
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Potential links to maths and science |
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Product development and improvement. Through the study and critical analysis of existing products students should develop and understanding of the requirements of the following:
Students should develop the skills to critically assess products and develop new design proposals. Students should develop their ability to work with a variety of materials, including two- and three-dimensional forms, to produce creative and original products which satisfy the demands of the target market, and consider accurate and efficient manufacture. When designing products/prototypes students should consider aesthetics, ergonomics and anthropometrics. |
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Inclusive design. Students should be aware of, and be able to explain, the development of products that are inclusive in their design so that they can be used by a wide range of users including the disabled, children, the elderly, transgender people and gender non-conformists. |
Health and safety
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Potential links to maths and science |
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Safe working practices:
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Understand why some materials, adhesives and finishes are hazards. |
Safety in products and services to the customer. Students should be aware of, and able to explain, how designers and manufacturers ensure products are safe for consumers to use, including:
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Protecting designs and intellectual property
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Potential links to maths and science |
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Students should be aware of, and able to explain, the importance of the following to the designer:
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Design for manufacturing, maintenance, repair and disposal
Manufacture, repair, maintenance and disposal
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The need to modify designs to make them more efficient to manufacture, including:
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Care and maintenance of products
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Students should be aware of, and able to explain, the different ways in which a product can be cared for and maintained, including care labels, their use and what they mean. |
Understand the relationship between care recommendations and fibre/fabric properties, eg the thermoplastic nature of synthetic fibres and wash/iron temperatures, shrinkage of wool fibres when washed at high temperatures and with excessive mechanical action. |
Feasibility studies
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Potential links to maths and science |
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The use of feasibility studies to assess the practicality for production of proposed designs, including the testing of prototypes with potential consumers. |
Interpret statistical analyses to determine user needs and preferences. Use data related to human scale and proportion to determine product scale and dimensions. |
Enterprise and marketing in the development of products
Enterprise and marketing
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The importance of marketing and brand identity, including:
The collaborative working of designers in the development of new and innovative fashion, clothing and textile products. Factors affecting product price, including:
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Interpretation of market research data, calculating costs and profit. |
Fashion cycles
Content | Potential links to maths and science |
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The sales and marketing cycles for specific product groups, including:
The impact of fashion on trend and the development of design products, including:
Industry development cycles, including:
The influence of trend and changes in lifestyle on fashion, clothing and textile products. |
Design communication
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Potential links to maths and science |
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A range of communication and presentation techniques for conveying design proposals to clients, potential users and manufacturers, including:
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Scaling drawings. Use of datum points and geometry when setting out design drawings. Representation of data used to inform design decisions and evaluation of outcomes. Presentation of market data, user preferences and outcomes of market research. |