Selection of Sewing Threads for Preform Manufacturing

Ogale, A.; Weimer, Christian; Mitscháng, Peter

doi:10.1177/096369350401300304

Cited by 7 publications

(5 citation statements)

References 4 publications

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“…The structure of the misplaced fibres may worsen the overall FRPC properties. The optimisation of the sewing thread and the stitching process can reduce this problem to some extent [19]. If optimised, the lock stitch might be useful for all kinds of seam applications, from fixing of the preform to structural stitching.…”

Section: Lock Stitchmentioning

confidence: 99%

Tailoring of Textile Preforms for Fibre-reinforced Polymer Composites

Ogale

Mitscháng

2004

Journal of Industrial Textiles

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The manufacturing of textile preforms is a well-established process for developing three-dimensional (3D) composite structures. The process of liquid composite molding (LCM) is an efficient method for the production of fibrereinforced polymer composite (FRPC) products. For the production of highperformance FRPCs, the sewn, the net shape, and ready-to-impregnate preforms are economically well suited in the LCM process [Mitschang, P., Ogale, A., Schlimbach, J., Weyrauch, F. and Weimer, C. (2003). Preform Technology: A Necessary Requirement for Quality Controlled LCM-processes, Polymers & Polymer Composites, 11(8): S. 605-622.]. Though the process of sewing has a long history, its usefulness in the area of composite manufacturing has not yet been fully exploited. The sewing technology, its associated parameters, required thread construction, and finally the stitch geometry are required to be considered thoroughly. Understanding the process of stitch formation and analysis of the available stitch geometries for preform stitching are the aims of this study. Various kinds of seams can be used in the preform development and structural assembling. The micrographic observations at the stitched zones help us to know the actual stitch geometry inside the FRPC structure, the amount of threads involved in each stitch type, the fibre displacement, and the structural properties. Furthermore, in order to widen the preform and the composite manufacturing practices, new technologies like single-sided-stitch, blind stitch, chain stitch, etc. are compared with the modified lock stitch. For structural reinforcements, the process-compatible carbon fibre thread, developed at the Institut fu¨r Verbundwerkstoffe GmbH (IVW) has been explained in detail. In this paper, the usefulness of tailored preforming technology and process optimisation steps are described briefly.

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Section: Lock Stitchmentioning

confidence: 99%

Tailoring of Textile Preforms for Fibre-reinforced Polymer Composites

Ogale

Mitscháng

2004

Journal of Industrial Textiles

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“…In the stitched samples increasing trend of stitch density at sewing machine increased the seam strength [1][2][3][4] and seam effectiveness in contrast seam elongation, seam efficiency and seam strength were decrease with increasing needle size [5][6][7]. It was recommended for sustainable seam performance solution [8] that lighter weight fabric stitch with fine sewing thread count while heavy weight fabric stitched with coarser sewing thread count for better [9][10][11]. Different fabric composition (cotton, polyester, silk) with constant weave was investigated the effect of different stitch types.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the dynamics of seam performance: a regression analysis approach for predictive modeling

Amir,

Asim

2024

Eng. Res. Express

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The performance of seams is crucial for the garment manufacturing industry's sustainability. This study delves into the factors impacting seam slippage, strength, and efficiency. By analyzing fabric specifications (weight and weave), machine settings (presser foot pressure and speed), and seam direction, the study uncovers their influence on seam properties. Samples of 100% cotton plain and twill fabrics, both of low (120g/m^2to140g/m^2) and high (275 g/m^2to320 g/m^2) weights, were chosen. Lock stitch type (301) and superimposed seam class were employed, with samples stitched in both weft and warp directions using the same stitch type, seam class, and substantial core spun sewing thread. An experimental design was created using variable parameters (fabric weight, weave, machine speed, and presser foot pressure), resulting in a 2^3 X 3^2 regression analysis. This design facilitated the development of 72 stitched samples. The regression analysis yielded an optimized solution, with square regressions indicating significant seam strength (85%) and efficiency (93%). In summary, this research provides insights into optimizing seam performance by understanding the interplay of fabric, machine, and stitching parameters, crucial for enhancing the quality and durability of garment seams.

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“…In this process, loose and tension free loops form on the downward side without adversely affecting the laminates material. Furthermore, tufting is beneficial as compared to conventional stitching methods because the material to be sewn needs to be only accessible from one side therefore there would be no need of complex and costly construction with lift tables [26,27].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of tufts contribution on the in-plane mechanical properties of flax fibre reinforced green biocomposite

Rashid

Hanus

Chetehouna

et al. 2021

Functional Composite Mater

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Traditional laminated composites have fibres oriented only in the in-plane of the laminate due to their manufacturing process, and are therefore very susceptible to transverse cracking and delamination from out-of-plane actions. Delamination can considerably reduce the load bearing capacity of a structure hence several reinforcement solutions, based on the principle to add out-of-plane reinforcement to the 2D fabric, have been explored to enhance the delamination resistance. However, the usual textile technologies for Z-reinforcement such as weaving, knitting, stitching, z-pinning, and tufting generates perturbations that may alter the in-plane mechanical properties. Although tufting is a single needle and single thread based one side stitching (OSS) technique which can incorporate almost tension free through the thickness reinforcement in a material, various types of microstructural defects may be created during the manufacturing process and lead to a degradation of the in-plane properties of the composite. Moreover, due to awareness in environmental concerns, the development and use of eco-friendly biocomposites to replace synthetic ones has been increasing.This research work investigates the effect on in plane mechanical properties of adding through the thickness reinforcement (TTR) by tufting in a flax based composite laminate to improve the transversal strength. The glass fibre tufted laminates of 550 g/m2 flax fibre were moulded using a 38% biobased thermoset resin by vacuum bag resin transfer moulding (VBRTM). The tufted and un-tufted in-plane mechanical properties of green biocomposite were determined in tension, compression and shear in accordance with ASTM 3039, ASTM D7137 and EN ISO 14130, using universal INSTRON 1186 and MTS 20 M testing machines. The quantification of the in-plane mechanical properties established a reduction of the in plane tensile mechanical properties, due to tufting, whereas the reduction effects are marginal in compression. As expected, the glass fibre tufts strength the connection between core and skin of the composite so that the interlaminar shear strength, deduced from flexural tests with small span-to-thickness ratio, is increased. Thanks to Digital Image Correlation (DIC) performed during shear tests, an increase in interlaminar shear modulus is highlighted.

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Selection of Sewing Threads for Preform Manufacturing

Cited by 7 publications

References 4 publications

Tailoring of Textile Preforms for Fibre-reinforced Polymer Composites

Tailoring of Textile Preforms for Fibre-reinforced Polymer Composites

Unveiling the dynamics of seam performance: a regression analysis approach for predictive modeling

Investigation of the effect of tufts contribution on the in-plane mechanical properties of flax fibre reinforced green biocomposite

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