Hot-melt pressure-sensitive adhesive for seamless bonding of nylon fabric part I: effect of a functional monomer

Kuo, Chung‐Feng Jeffrey; Chen, Jiong‐Bo; Lin, P. H.; Yen, Hui-Ting

doi:10.1177/0040517518763993

Cited by 8 publications

(5 citation statements)

References 31 publications

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“…In TGA curve, the pyrolysis of TPU can be divided into the pyrolysis of hard segment at 200 °C to 400 °C and the pyrolysis of soft segment at 400 °C to 500 °C [ 26 , 27 ]. Additionally, the pyrolysis temperature is related to molecular weight of the polymer [ 28 ], described below: (a) TPU synthesized with end-capping agent D03, the content of end-capping agent increases from 5.0 phm to 15 phm, and the pyrolysis temperature of TPU drops from 312 °C to 309 °C; (b) TPU synthesized with end-capping agent D05, the content of end-capping agent increases from 5.0 phm to 15 phm, and the pyrolysis temperature of TPU drops from 328 °C to 317 °C; (c) TPU synthesized with end-capping agent D07, the content of end-capping agent increases from 5.0 phm to 15 phm, and the pyrolysis temperature of TPU drops from 322 °C to 320 °C; (d) TPU synthesized with end-capping agent D10, the content of end-capping agent increases from 5.0 phm to 15 phm, and the pyrolysis temperature of TPU drops from 332 °C to 323 °C.…”

Section: Resultsmentioning

confidence: 99%

Design of Acrylate-Terminated Polyurethane for Nylon Seamless Bonding Fabric Part I: Design of the End-Capping Thermoplastic Polyurethane Adhesive with Acrylate Copolymer

Chen

Lin²,

Ahmad³

et al. 2022

Polymers

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This series of studies aims to design acrylate-terminated polyurethanes for use in nylon seamless bonded fabrics. The first part used N,N-dimethylacrylamide (DMAA) and methyl methacrylate (MMA) to replace the chain extender in polyurethane synthesis as end-capping agent to synthesize thermoplastic polyurethane (TPU) adhesive. The molecular weight of the TPU is controlled to further influence the mechanical and processing properties of the polyurethane. Here, polytetramethylene ether glycol (PTMG) and 4,4-methylene diphenyl diisocyanate (MDI) were polymerized, and then a blocking agent was added thereto. The results show that the characteristic peaks of benzene ring and carbamate of TPU adhesive are at 1596 cm−1 and 1413 cm−1, respectively, while the characteristic peaks of DMAA are at 1644 cm−1 and 1642 cm−1 in the FT-IR spectrum. There is an absorption peak –N=C=O– which is not shown near 2268 cm−1, which proves that the structure of TPU contains the molecular structure of capping agent, PTMG and MDI. When the DMAA concentration in the capping agent was increased from 3.0 wt% to 10 wt%, the –C=O (H-bond) area percentage of hydrogen bonds formed at 1711 cm−1 increased from 41.7% to 57.6%, while the –NH (H bond) produced at 3330 cm−1 increased from 70% to 81%. These phenomena suggest that increasing the concentration of DMAA capping agent can effectively promote the formation of complex supramolecular network structures by hydrogen bonding in TPU. The content and concentration of the capping agent affects the molecular weight of the TPU. Chain growth is terminated when molecular weight growth can be effectively controlled and reduced. It was observed in thermal analysis that with increasing DMAA concentration in the molecular structure, the concentration of capping agent in TPU, hydrogen bonding force between hard segments, melting point (Tmh) and melting enthalpy (ΔH) all increased the capping agent. The pyrolysis temperature of TPU is increased by 10–20 °C.

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Section: Resultsmentioning

confidence: 99%

Design of Acrylate-Terminated Polyurethane for Nylon Seamless Bonding Fabric Part I: Design of the End-Capping Thermoplastic Polyurethane Adhesive with Acrylate Copolymer

Chen

Lin²,

Ahmad³

et al. 2022

Polymers

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“…The chemical structure of the HMAs was confirmed using Fourier transform infrared (FTIR) spectroscopy (FTS-1000 spectrometer, Digilab Co., Ltd, USA) equipped with an attenuated total reflectance (ATR) accessory using a transmittance range of about 600–4000 cm −1 . Proton nuclear magnetic resonance ( 1 H-NMR), using a Bruker Avance 600 NMR spectrometer with solvent CDCl 3 , was also used to support the FTIR results. Monomer conversion ( x ) was defined as the weight ratio of the HMAs formed to the initial monomers.…”

Section: Methodsmentioning

confidence: 99%

“…As seamless bonding can reduce the work of machine sewing, the development of seamless textiles has become an interest of many researchers in recent years. 1 Seamless bonding allows the elimination of sewing for several applications, such as zippers, pockets, patches, etc., thereby bringing both aesthetic and economic benefits. 2…”

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confidence: 99%

Synthesis of acrylic hot-melt adhesive based on poly(methyl methacrylate)-b-poly(2-ethylhexyl acrylate) copolymer using atom transfer radical polymerization for a nylon fabric bonding system

Kuo

Chen

et al. 2019

Textile Research Journal

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Adhesives, such as hot-melt adhesives (HMAs), are widely used in the textile industry for bonding layers of materials and have replaced traditional sewing methods. The block copolymer is a common type of HMA that provides excellent physical features and mechanical properties compared with others. Acrylate-based monomers, methyl methacrylate (MMA), and 2-ethylhexyl acrylate (2-EHA) were used as ingredients to form a linear block copolymer using atom transfer radical polymerization. MMA provides excellent cohesive strength, while 2-EHA provides good adhesion properties. An end-brominated poly(methyl methacrylate) (PMMA-Br) macroinitiator was synthesized from a MMA monomer and initiator, with the best composition obtained by the addition of a 0.6 mol initiator. The macroinitiator had the lowest molecular weight with highest conversion (97%). The addition of a 0.3 mol macroinitiator showed the lowest molecular weight with the highest conversion of acrylic copolymer PMMA- b-poly(2-ethylhexyl acrylate) (PEHA). The glass transition temperature increased with the addition of the macroinitiator concentration, from −43.7℃ to −37.6℃. The thermal stability was reduced with the addition of macroinitiator content, from 332.37℃ to 286.81℃. The shear strength and peel strength of the PMMA- b-PEHA HMAs on nylon fabrics were enhanced from 11.24 to 16.92 kg cm−2 and from 0.29 to 0.61 kg cm−1, respectively, and did not change significantly after being washed 50 times and then kept in low-temperature storage, with the addition of the macroinitiator concentration. The block copolymer PMMA- b-PEHA prepared in this study could be used as a HMA for nylon fabric bonding systems.

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“…Their characteristic lies in their structure, which contains a high content of urethane and urethane ester bonds. Polyurethane hot-melt adhesives have many advantages, such as being environmentally friendly; easy to use and process; effectively wetting the surface of many substrates; diffusing through porous substrates; having good toughness, water resistance, impact resistance and chemical resistance; and forming covalent bonds with substrates containing active hydrogen [ 7 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Study of Synthesis of Dual-Curing Thermoplastic Polyurethane Hot-Melt Adhesive and Optimization by Using Gray Relational Analysis to Apply in Fabric Industry to Solve Seamless Bonding Issues

Lin,

Ahmad,

Jeffrey Kuo

2024

Polymers

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People wear clothes for warmth, survival and necessity in modern life, but in the modern era, eco-friendliness, shortened production times, design and intelligence also matter. To determine the relationship between data series and verify the proximity of each data series, a gray relational analysis, or GRA, is applied to textiles, where seamless bonding technology enhances the bond between components. In this study, a polyurethane prepolymer, 2-hydroxyethyl acrylate (2-HEA) as an end-capping agent and n-octyl acrylate (ODA) as a photoinitiator were used to synthesize a dual-curing polyurethane hot-melt adhesive. Taguchi quality engineering and a gray relational analysis were used to discuss the influence of different mole ratios of NCO:OH and the effect of the molar ratio of the addition of octyl decyl acrylate on the mechanical strength. The Fourier transform infrared spectroscopy (FTIR) results showed the termination of the prepolymer’s polymerization reaction and the C=O peak intensity at 1730 cm−1, indicating efficient bonding to the main chain. Advanced Polymer Chromatography (APC) was used to investigate the high-molecular-weight (20,000–30,000) polyurethane polymer bonded with octyl decyl acrylate to achieve a photothermosetting effect. The thermogravimetric analysis (TGA) results showed that the thermal decomposition temperature of the polyurethane hot-melt adhesive also increased, and they showed the highest pyrolysis temperature (349.89 °C) for the polyhydric alcohols. Furthermore, high peel strength (1.68 kg/cm) and shear strength (34.94 kg/cm2) values were detected with the dual-cure photothermosetting polyurethane hot-melt adhesive. The signal-to-noise ratio was also used to generate the gray relational degree. It was observed that the best parameter ratio of NCO:OH was 4:1 with five moles of monomer. The Taguchi quality engineering method was used to find the parameters of single-quality optimization, and then the gray relation calculation was used to obtain the parameter combination of multi-quality optimization for thermosetting the polyurethane hot-melt adhesive. The study aims to meet the requirements of seamless bonding in textile factories and optimize experimental parameter design by setting target values that can effectively increase production speed and reduce processing time and costs as well.

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Hot-melt pressure-sensitive adhesive for seamless bonding of nylon fabric part I: effect of a functional monomer

Cited by 8 publications

References 31 publications

Design of Acrylate-Terminated Polyurethane for Nylon Seamless Bonding Fabric Part I: Design of the End-Capping Thermoplastic Polyurethane Adhesive with Acrylate Copolymer

Design of Acrylate-Terminated Polyurethane for Nylon Seamless Bonding Fabric Part I: Design of the End-Capping Thermoplastic Polyurethane Adhesive with Acrylate Copolymer

Synthesis of acrylic hot-melt adhesive based on poly(methyl methacrylate)-b-poly(2-ethylhexyl acrylate) copolymer using atom transfer radical polymerization for a nylon fabric bonding system

Study of Synthesis of Dual-Curing Thermoplastic Polyurethane Hot-Melt Adhesive and Optimization by Using Gray Relational Analysis to Apply in Fabric Industry to Solve Seamless Bonding Issues

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