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Interlinings, also called interfacing, are generally nonwoven fabrics that add more structure and body to garment components like collars, button plackets, waistbands, and cuffs. Interlinings may be fusible or sew-on. Interlining fabric durability is important for garment construction. Fusible interfacing can become unglued from fabric and shift, creating rippling, puckering, and unevenness. Hence, the fusible interfacing should be tested for their performance for defects such as cracking, bubbling, and delamination during their regular use. Fusible interfacings are susceptible to the adhesive bleeding through causing darker spots on the surface called strike-through. Fusible interlinings are assessed for their ability to stay bonded to the fashion fabric and not shift during wear and cleaning. They are also tested for compatibility and shrinkage. Compatibility indicates good drapability, bulk, and support of the fabric at the attachment point. Shrinkage can cause puckering of the attached point and bubbled appearance. The three parameters such as temperature, pressure, and time should be appropriately selected to avoid improper interlining attachment.
However the quality of the face fabrics and non woven interlining used in making samples does not always conform to the materials delivered for production. The face fabrics and their interlinings must therefore be tested again to verify the previously accepted fusing parameters.
One of the first successful applications of nonwovens was as interlinings for clothing (Assent, 2003). Nonwovens are still widely used for this purpose but are also used as the main material for protective clothing (Haase, 2003) and increasingly as the outer layer in fashion-based and technical garments (University of Leeds, 2007). The making-up of nonwovens is therefore an important consideration. Patterning, cutting and joining are considered very basically here.
Nonwovens for interlinings are processed in such a way as to give them an adhesive surface. The patterns for these nonwovens are designed and made together with the patterns for the upper fabric and garment lining during the pattern design and grading stages. Table 8.2 outlines the functional aspects of nonwovens that impact on their performance as interlinings, and highlights the stages of fabric production that affect these aspects.
