Texturing, stretching and relaxation behaviour of polylactide multifilament yarns

2011 ◽  
Vol 81 (17) ◽  
pp. 1788-1795 ◽  
Author(s):  
Albert M Manich ◽  
Rui Miguel ◽  
Jose Lucas ◽  
Francisco Franco ◽  
Barbara Baena ◽  
...  
Keyword(s):  
Relaxation Behaviour ◽  
Multifilament Yarns

scholarly journals Measurements of Inverse Creep in Polyester Multifilament Yarns

2020 ◽  
pp. 128-132
Author(s):  
Pratap G. Patil
Keyword(s):  
Embedded System ◽  
Personal Computer ◽  
Relaxation Behaviour ◽  
Textile Materials ◽  
Fundamental Properties ◽  
Electronic Timer ◽  
Receiver Unit ◽  
Multifilament Yarns ◽  
Set Up ◽  
Inverse Creep

Creep and Inverse creep are the important fundamental properties of textile materials. These properties determine the relaxation behaviour of the product. We have designed and fabricated an instrument which can measure the creep and inverse creep. The instrument consists of a Trans - Receiver unit interfaced with Embedded System along with the Personal Computer. Existing technique for measuring inverse creep does not measure the instantaneous extension or contraction. The newly fabricated instrument, can measure the instantaneous extension and contraction of the yarn up to an accuracy of 0.02%. This can be measured after every 500 µs. The position of the yarn, which is to be hanged, is vertical. The ‘Electronic Timer Unit’, replaces a meter scale. Set up is improved by using electronic utilities. The capability is enhanced to next level of time and distance resolutions. Automation enables to have flexibility of time from microseconds to minutes. Data is stored in different text files. Different samples of Polyester multifilament yarn were used in the experiment. The length and the load were altered. Change in stress lead to instantaneous extension or contraction followed by creep or inverse creep. This can sensed by the sensor and further stored in the memory of the Computer. The percentage creep and inverse creep were measured and have been reported in this present paper

The effects of texturing induced microstructural changes on the relaxation behaviour of polyamide 66 multifilament yarns

2007 ◽  
Vol 8 (5) ◽  
pp. 512-519 ◽  
Author(s):  
A. M. Manich ◽  
J. Maillo ◽  
D. Cayuela ◽  
J. Gacén ◽  
M. D. de Castellar ◽  
...  
Keyword(s):  
Relaxation Behaviour ◽  
Polyamide 66 ◽  
Microstructural Changes ◽  
Multifilament Yarns

STRESS RELAXATION BEHAVIOUR AND MECHANISM OF HEAT TREATED INCONEL 718 IN HIGH TEMPERATURE ENVIRONMENTS

2013 ◽  
Vol 21 (1) ◽  
pp. 43-51
Author(s):  
O. Bapokutty ◽  
◽  
Z. Sajuri ◽  
J. Syarif ◽  
◽  
...  
Keyword(s):  
High Temperature ◽  
Stress Relaxation ◽  
Inconel 718 ◽  
Relaxation Behaviour ◽  
Heat Treated

scholarly journals Coatings with recycled polyvinyl butyral on polyester and polyamide mono- and multifilament yarns

2021 ◽  
Author(s):  
Rike Brendgen ◽  
Carsten Graßmann ◽  
Thomas Grethe ◽  
Boris Mahltig ◽  
Anne Schwarz-Pfeiffer
Keyword(s):  
Mechanical Properties ◽  
Chemical Resistance ◽  
Crosslinking Agent ◽  
Polyvinyl Butyral ◽  
Polymer Dispersion ◽  
Safety Glass ◽  
Enhanced Properties ◽  
Multifilament Yarns ◽  
Textile Coating ◽  
Recycled Material

AbstractPolyvinyl butyral is used in safety glass interlayers, mainly in car windshields. Legislative regulations require a recycling of cars after their lifetime and therefore also their safety glass. This causes the availability of recycled polyvinyl butyrate (r-PVB) originated from safety glass interlayers. Due to deteriorated optical properties, such as the transparency, and unknown amounts of plasticizers, it is challenging to reuse the recycled material in new windshields. Therefore, it is of particular interest to find new fields of application for r-PVB, such as the usage as a textile coating. In this research, r-PVB was investigated as a material for yarn coating. Polyester and polyamide mono- and multifilament yarns were coated continuously with solely a polymer dispersion and with mixtures of crosslinking agent and polymer dispersion. Crosslinked r-PVB coatings showed enhanced properties toward abrasion and chemical resistance. Coatings without the crosslinking agent showed a diminished abrasion resistance and could be washed off with ethanol. Mechanical properties of the monofilaments were influenced by the r-PVB coating in general. However, varying concentrations of the crosslinking agent did not affect the mechanical properties.

Bicomponent multifilament yarns of recycled poly(ethylene terephthalate) and nano-titanium dioxide for antibacterial carpet

2021 ◽  
pp. 152808372110117
Author(s):  
Sommai Pivsa-Art ◽  
Komson Sunyikhan ◽  
Weraporn Pivsa-Art
Keyword(s):  
Antibacterial Activity ◽  
Titanium Dioxide ◽  
Ethylene Terephthalate ◽  
Antibacterial Properties ◽  
Nano Structure ◽  
Elongation At Break ◽  
High Antibacterial Activity ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Multifilament Yarns

Recycled poly(ethylene terephthalate) (RPET) multifilament yarns are used in carpet manufacturing as a way to reduce plastic waste. The conventional RPET carpet is however susceptible to bacterial accumulation. As a result, this research experimentally doped RPET with nano-structure titanium dioxide (nano-TiO2) to produce RPET/nano-TiO2 bicomponent multifilament yarns with antibacterial property. The experimental multifilament yarn structure consisted of two parts: neat RPET core and RPET/nano-TiO2 shell. The nano-TiO2 content in the shell was varied between 1 and 3 wt% and the core/shell (C/S) ratios between 90/10, 70/30, and 50/50 w/w. The effects of C/S ratio and nano-TiO2 content on the mechanical and antibacterial properties of bicomponent multifilament yarns were determined. The experimental results indicated that the C/S ratio had no effect on the tenacity and elongation at break. Meanwhile, the tenacity and elongation at break of bicomponent fibers increased with nano-TiO2 content in the shell. The TiO2-doped RPET bicomponent yarns effectively inhibited the growth of Escherichia coli and Staphylococcus aureus. The 90/10 bicomponent multifilament fiber with 3 wt% TiO2 achieved the highest antibacterial activity. The very high antibacterial activity was attributable to greater deposition of nano-TiO2 particles near and on the shell surface.

Tensile static, fatigue and relaxation behaviour of closed cell electret PVDF foams

2011 ◽  
Vol 43 (9) ◽  
pp. 459-466 ◽  
Author(s):  
Abderrezak Bezazi ◽  
Nadia Frioui ◽  
Fabrizio Scarpa
Keyword(s):  
Static Fatigue ◽  
Relaxation Behaviour ◽  
Closed Cell

A family of one-dimensional lanthanide complexes bridged by two distinct carboxylate ligands with the Dy analogue displaying magnetic relaxation behaviour

2017 ◽  
Vol 46 (41) ◽  
pp. 14114-14121 ◽  
Author(s):  
Wen-Hua Zhu ◽  
Xia Xiong ◽  
Chen Gao ◽  
Shan Li ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Lanthanide Complexes ◽  
Relaxation Behaviour ◽  
Carboxylate Ligands ◽  
One Dimensional ◽  
Synthetic Strategy

Utilizing two different carboxylate ligands to construct dysprosium SMMs with relatively good performance was proven to be a successful synthetic strategy.

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