case i: thermochromic coatings
Transcription
case i: thermochromic coatings
“The functionalization processes, the way to improve hometextiles technically” UTIB TURKISH TEXTILE AND CLOTHING SECTOR VI. INTERNATIONAL R&D BROKERAGE Bursa, April 2014. I. AITEX- CENTER OF EXCELENCE II. INTRODUCTION III. TRENDS AND NEW MARKETS IV. SUCCES CASES V. GENERAL CONCLUSIONS “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 I. AITEX CENTER OF EXCELLENCE IN APPLIED RESEARCH AND TECHNOLOGICAL DEVELOPMENT AITEX, Textile Industry Research Association. It is currently, the leading Spanish centre for research, innovation and advanced technical services available to the textile, manufacturing and technical textile sectors. AITEX is a private non profit association that encopasses textile and textile relates companies. Its ultimate aim is to make this sector more competitive, so they have new bussiness opportunities. “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 I. AITEX CENTER OF EXCELLENCE IN APPLIED RESEARCH AND TECHNOLOGICAL DEVELOPMENT “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 I. AITEX- CENTER OF EXCELENCE II. INTRODUCTION III. TRENDS AND NEW MARKETS IV. SUCCES CASES V. GENERAL CONCLUSIONS “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 I. INTRODUCTION: FUNTIONALIZATION The needs for innovation in the textile sector are directed towards: – The development of new textiles with special properties. – The diversification existing ones. of Coating • Lamination • Surface treatments • Electrospining DISPERSANT the These special properties can be achieved, in most cases, by modifying the textile surface through technical finishing processes: • BASE RESIN MICRO/NANO PARTICLES Coating paste Adhesives membrans Functionalization “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 I. INTRODUCTION Coating Application of a chemical in a liquid state or a compound formulation, on a textile substrate, directly or by transfering, to one or both sides. AIR KNIFE COATING “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 I. INTRODUCTION Coating Application of a chemical in a liquid state or a compound formulation, on a textile substrate, directly or by transfering, to one or both sides. KNIFE OVER CILINDER COATING “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 I. INTRODUCTION Hot Melt Hot Melt adhesives are solid polymers that melt when subjected to temperatures of between 80 and 220 ºC and solidify again quickly when it cools down. The Hot Melt adhesives are 100% dry substances and are applied in a melt without the use of water or solvents. Engraved cylinder system “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 I. INTRODUCTION Electrospinning A high voltage is applied to a polymer solution such that charges are induced within the solution. One electrode of the voltage source is placed into the solution and the other is connected to the collector. When charges within the solution reached a critical amount, a fluid jet will erupt from the droplet at the tip of the needle resulting in the formation of a Taylor cone. The electrospinning jet will travel towards the region of lower potential, which in most cases, is a grounded collector. A web of solid randomly oriented nanofibers is deposited on the surface of the grounded collector. “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 I. INTRODUCTION: FUNCTIONALIZATION % Release Protection against metal splashes released allatoine (%) 100 Afection treatments 80 Antiestatic and antimicrobial properties 60 40 20 0 day 0 day 1 0,2% Allantoin day 2 day 4 0,5% Allantoin day7 0,7% Allantoin SPECIAL PARTICLES Stab protection Acoustic and thermal insulation Activated blood circulation Inprovement abrasion properties “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 I. AITEX- CENTER OF EXCELENCE II. INTRODUCTION III. TRENDS AND NEW MARKETS IV. SUCCES CASES V. GENERAL CONCLUSIONS “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 III. TRENDS AND NEW MARKETS The technical textiles sector obtained by coating, laminating and functionalization is a highly technical, very competitive market and in a constant growth. In 2011, for example, nearly 8% of laminating companies in the EU were Spanish (27), with a turnover of 400 million euros (European total turnover= 8.000 million euros). Coated / laminated technical fabrics demand distribution at European level, in 2011(Detrell A. The European Coating and Laminating Sector. TCL2012). “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 III. TRENDS AND NEW MARKETS In Europe, hotmelt technology is a fully developed technology , which started to come into use in the early 2000s, with the development of new laminating sytems, new membranes and new adhesives. Nevertheless, it did take about 10 years to reach its true potential and the leading technical finishing companies are already incorporating it into their production processes, starting to generate technical articles with a high demand. Sales evolution (data in million metres) of waterproof-breathable articles in the EU (Detrell A. The European Coating and Laminating Sector. TCL2012). “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 III. TRENDS AND NEW MARKETS Trends Use of additives to obtain special features which are not provided by the finishing products available in the actual market. New technical finishing products more environmentally friendly and health safer (fluorocarbons C6-C4 versus C8/PFOA, phthalate-free plasticizers, glyoxalic resin with "zero formaldehyde”,N-P base flame retardants). Coatings/prints with conductive polymers or metallic particles dispersions, to obtain lighting fabrics, heated or electronic applications. New machinery/hotmelt applicators ecological and efficient. designs that are more “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 III. TRENDS AND NEW MARKETS New possible markets Printed Electronics: Flexible substrates for the electrical/electronics sector, using conductive inks, conductive polymers or resins treated with metallic nanoparticles. Textile Architecture: Outdoor fabrics, high tenacity PES base, coated or laminated with fluorinated polymers. Thermal and acoustic isolation: Through coating process, using micro/nanostructured treated with UV/IR reflective particles Manufacture of technical finishing eco-sustainable machinery that favor the low consumption of water, energy and chemicals, allowing to obtain functional fabrics and even directly made-up garment. “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 I. AITEX- CENTER OF EXCELENCE II. INTRODUCTION III. TRENDS AND NEW MARKETS IV. SUCCES CASES V. GENERAL CONCLUSIONS “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 II. SUCCESS CASES I. THERMOCHROMIC COATINGS II. COURTAINS WITH ACOUSTIC PROPERTIES “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE I: THERMOCHROMIC COATINGS Market needs Objetive Experimental development Results Conclusions/next steps “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE I: THERMOCHROMIC COATINGS Market needs Unique camouflage military uniform, that could be used for both, the arid landscape and the wooded one. Alarm device integrated into the firefighter suit to indicate burn temperature risk. “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE I: THERMOCHROMIC COATINGS Objetive Camouflage military uniform, It is intended to move from a arid camouflage to a wooded camouflage through a change in Tª, 35-39ºC. Thermochromic dyes and auxiliary products are studied for their use by frame printing process. It is very important to stabilize lightfastness result. Firefighter suit , It is intended to detect high temperatures and warn them in a visual way through changing the color of the fabric, at 60ºC and at 80ºC. In this research, dyes and auxiliary products that could be used by knife coating technology, should be studied. “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE I: THERMOCHROMIC COATINGS Experimental development: Arid-wooded military camouflage Main difficulties encountered: Matching colors with printing pastes and with fabric base coloration Lightfastness improvement “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE I: THERMOCHROMIC COATINGS Experimental development: Arid-wooded military camouflage “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE I: THERMOCHROMIC COATINGS Results Change of colour with temperature Wooded 25ºC Increase of the temperature 35-39ºC Arid “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE I: THERMOCHROMIC COATINGS Experimental development: Warning device to indicate burn temperature risk. Main difficulties encountered: Matching colors with printing pastes and with fabric base coloration. Lightfastness improvement, in this case it has been resolved by protecting the bands with a flap, that only rises when the fireman performs an intervention. 60ºC 60ºC 80ºC 80ºC “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE I: THERMOCHROMIC COATINGS Experimental development: Warning device to indicate burn temperature risk. “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE I: THERMOCHROMIC COATINGS Results Clothing and integration 60ºC 80ºC “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE I: THERMOCHROMIC COATINGS Conclusions / next steps The chromatic range must combine the change of the thermochromic pigments color with the textile substrate base color. Durability and color fastness in some cases can be improved (following steps) It is possible to create fabrics that change color in a 'smart' way, induced by an external stimulus ( in this case, temperature change) Using simple conventional techniques and processes (such as printing or knife coating), it is possible to apply a thermochromic finishing with highly technical end-use applications. “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 IV. SUCCESS CASES I. THERMOCHROMIC COATINGS II. FUNCTIONAL COURTAINS WITH ACOUSTIC PROPERTIES “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE II. FUNCTIONAL COURTAINS WITH ACOUSTIC PROPERTIES Market needs Objetive Experimental development Results Conclusions/next steps “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE II. FUNCTIONAL COURTAINS WITH ACOUSTIC PROPERTIES Market needs From the architectonic point of view, the noise, that affects the habitability of a dwelling, should be addressed of two different ways, depending on the origin of the noise and the effect to be achieved. Isolation Protection of a reception dwelling against the noise penetration that interferes with desired sound signal. Provide a silence environment. Conditioning Achieving that theNOISE, soundanycoming sound from a source will be irradiated that can cause a lose of audition or can be to homogeneously in all directions, harmful for health obtain an ideal diffuse sound field, avoiding reverberations. “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE II. FUNCTIONAL COURTAINS WITH ACOUSTIC PROPERTIES Objetive Obtaining a functionalized hometextile with: • Acoustic properties in order to reverberation noise. • Fire retardant properties. • Blackout properties. avoid the This technical hometextile is developed according International Standards and its installation must be very easy. “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE II. FUNCTIONAL COURTAINS WITH ACOUSTIC PROPERTIES Experimental development – Design and installation The acoustic assays was made under real mounting conditions. Distances between window and curtains from 8,5 to 14,5 cm. WITHOUT HOTMELT The folding of the curtain was measured from 0%, that is FR the curtain completely extended, to the 200% that is a curtain with threefold of fabric. In a meeting room In a Reverberation Chamber “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE II. FUNCTIONAL COURTAINS WITH ACOUSTIC PROPERTIES Results Fire retardant • Class 1 according ISO 13773:2003 Blackout • Opacity 99,5 % Acoustic absorbent • α = 0,6 plenum 8,5 - 14,5 cm y folding 100 - 150% “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE II. FUNCTIONAL COURTAINS WITH ACOUSTIC PROPERTIES Results - Conditioning of the meeting room The use of curtains reduces the reverberation time and improves the acoustic comfort. Meeting room without curtains Meeting room with curtains “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE II. FUNCTIONAL COURTAINS WITH ACOUSTIC PROPERTIES Results - Conditioning of the meeting room Reverberation time (s) The use of curtains reduces the reverberation time and improves the acoustic comfort. Without curtains With window curtain open With all curtains close “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 CASE II. HOT MELT LAMINATE. FIREPROOF PROPERTIES FUNCTIONALIZATION Conclusions Hometextile, can be multifunctional product as acoustic and light absorbent with fire retardant properties. Hometextile, as a decorative element, can achieve that the sound, coming from a source, will be irradiated homogeneously in all directions, to obtain an ideal diffuse sound field, avoiding reverberations. “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 I. AITEX- CENTER OF EXCELENCE II. INTRODUCTION III. TRENDS AND NEW MARKETS IV. SUCCES CASES V. GENERAL CONCLUSIONS “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 V. GENERAL CONCLUSIONS Additivation of coating paste to improve technichal performance such as resistence to abrasion or to molten metals, or to obtain new properties such as color change, is possible by using specific additives. A major effort must be done in formulation to avoid several problems. Application techniques and processes required to obtain this coating functionalization are very simple and conventional. Final obtained textile articles should present a balance between functionality and durability. “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014 Maria Blanes (Head of Research Group) [email protected] AITEX “The functionalization processes, the way to improve hometextiles technically” Turkey, April 2014