Knowledge of ethylene vinyl acetate eva interlayer film for laminated glass

All rights reserved by:China (Ethylene-vinyl acetate)EVA Interlayer Film Manufacturer for Safety Laminated Glass, Smart Glass, Privacy Glass, LEDGlass, PV Solar [email protected] / [email protected] / [email protected] / [email protected]

Sponsored by:China Ucolin Glass Lamination Solution Experts:-Silicone Vacuuming Bag for EVA Glass Laminating Machine/Privacy Glass Laminating-Silicone Rubber Sheet Manufacturer for Solar EVA Photovoltaic Panel Encapsulation([email protected] / www.ucolin.com /[email protected]/[email protected])

Knowledge of Ethylene-vinyl acetate EVA Interlayer Film for Laminated Glass

Hi everybody, I am Peter Shin from China. I have been in EVA FILM industry for many years. As many glass related workersstill not believe in EVA FILM, they don’t believe that EVA FILM can replace PVB FILM in many fields.In the same time, EVA FILM has many advantages against PVB FILM.So i think it’s my job to spread EVA FILM knowledge to more people.If you want to learn more, go to our EVA FILMS’ INFO blog: www.evafilms.com

EVAEVAEVAEVA FFFFilm:ilm:ilm:ilm:EVA stands for ethylene vinyl acetate, a copolymer resin used in the production of laminated glass as the interlayer sandwichedbetween two pieces of glass. The main function of the interlayer is to stick the two piece of glass together, in order to make thesandwiched glass safer and more secure.EVA Film is made out of macromolecule material and it performs excellent in bonding strength, heat resistance, cold resistance,humidity resistance and tensile strength in laminated glass. It has been partly taking the places of PVB film in laminated safetyglass, laminated art glass, laminated color glass.EVA film is not adhesive before heating. After heating, it melts and reacts. In the production of laminated glass with EVAinterlayer, no autoclave, roller press, air bag, or vacuum rubber ring is required. As EVA interlayer can be processed undernormal climatic conditions, no clean room with climatic control is required. And the producing machine of laminated glass withEVA Film is less cost and easier to process.

LaminatedLaminatedLaminatedLaminated GlassGlassGlassGlass withwithwithwith EVAEVAEVAEVA FilmFilmFilmFilmLaminated Glass with EVA Film is an important kind of laminated glass in glass industry .The processing principle of EVAlaminated glass is similar to most of the laminated glass . Furthermore, using EVA film to laminating glass does not requireautoclave. All laminating processing will be finished and completed in one vacuum laminator. EVA Film for laminated glasshas excellent transparency, outstanding adhesion and aging-resistance (more than 15 years), can be used for architectural glass,decorative glass with fabric, privacy glass, auto glass etc.

AdvantagesAdvantagesAdvantagesAdvantages ofofofof EVAEVAEVAEVA filmfilmfilmfilm ::::- High tensile strength- Excellent transparency- Outstanding adhesion- UV protection- High impact resistance- Good temperature withstanding- Water proof

http://www.evafilms.com



- Humidity durable- Long-term reliable (long-term aging resistance)- Sound barrier

NamesNamesNamesNames ofofofof EVAEVAEVAEVA FILMFILMFILMFILM forforforfor LaminatedLaminatedLaminatedLaminated GlassGlassGlassGlassSome will call EVA Film in different name:-laminated glass eva interlayer-ethylene vinyl acetate film-solar eva film-glass lamination film-glass laminating film-laminating film rolls-lamination film-safety glass film-tempered glass film-security glass film-glass eva film-laminate film-security laminate film-decorative glass film-stained glass film

EVAEVAEVAEVA FILMFILMFILMFILM CategoryCategoryCategoryCategoryBasedBasedBasedBased onononon thethethethe UVUVUVUVBlockedBlockedBlockedBlocked rate,rate,rate,rate, thethethethe EVAEVAEVAEVA FILMFILMFILMFILM cancancancan divideddivideddivideddivided intointointointo ::::Indoor EVA FILM and Outdoor EVA FILM.Indoor EVA FILM, of course, the UV blocked rate is lower than 50%. So they can only be used inside building.

But how is it going to happen, if I put the indoor EVA FILM laminated glass in outdoor using?The indoor EVA FILM laminated glass will turn yellow in short period, maybe two years, and bubbles will come out inside thelaminated glass, and the EVA FILM will break away from the glass.

For outdoor EVA FILM, the most advanced EVA FILM can absorb 99% of the UV radiation.But at least the UV radiation should be absorbed more than 85% percent to be implied for outdoor.

Yes, it’s not necessary to say but I want to mention that you can use the outdoor EVA FILM for indoor.

BasedBasedBasedBased onononon thethethethe transparence,transparence,transparence,transparence, thethethethe EVAEVAEVAEVA FILMFILMFILMFILM cancancancan dividedividedividedivide into:into:into:into:



Ordinary transparent and super transparent.Ordinary transparent, of course, means the transparence is good but less than super transparent. Most ordinary transparent EVAFILM is used in laminating with fabric and papers.And generally speaking, the ordinary transparent EVA FILM are INDOOR EVA FILM. And super transparent EVA FILMs areoutdoor EVA FILM.But because some people need the super transparence but not the UV blocked rate, some EVA FILM manufacturer make theINDOOR super transparent EVA FILM.

BasedBasedBasedBased onononon colors,colors,colors,colors, EVAEVAEVAEVA FILMFILMFILMFILM cancancancan dividedividedividedivide into:into:into:into:-no color transparent-colored transparent (standard 8 colors in China)-colored translucent (standard 7 colors in China)-colored opaque-Black (transparent, translucent, opaque)-white (transparent, translucent, opaque)The standard colors are:RED/DEEP GREEN/GRASS GREEN/BLUE/LEMON YELLOW/ORANGE YELLOW/PURPLE/PINKSome companies can customize the color you need. First you offer the samples, and they will adjust the color film samples foryou to check. But of course, the cost would be higher. It’s different depending the quantity of the color film you want tocustomize.

BasedBasedBasedBased onononon thickness,thickness,thickness,thickness, thethethethe EVAEVAEVAEVA FILMFILMFILMFILM cancancancan dividedividedividedivide into:into:into:into:0.25 mm0.38mm0.76mmAlso, the EVA FILM manufacturer can customize the thickness for you.

CommonCommonCommonCommon problemsproblemsproblemsproblems ofofofof EVAEVAEVAEVA FILMFILMFILMFILMFollowing are some common problems the EVA Film may have if the Manufacturer produce bad quality EVA Film.-Gluing of EVA,- Mosquitoes- Black spots- Holes on EVA FILM-for colorful EVA FILM, the color is not even.- Knocked marks



- Yellowing of EVA and etc. …GluingGluingGluingGluing ofofofof EVAEVAEVAEVAWhich means the two layer of EVA FILM stick together, three reasons can cause it:(1) The EVA FILM is ultra-transparent film; they are easy to show adhesives. In this situation, put membranes between the twolayers of EVA FILM.(2) The temperature is too high, like the temperature in the container is too high (maybe over 65 degree), which will lead theEVA FILM to melt, and stick together.(3) The film is too tight when it was produced, this is factory’s problem, they should loosen the EVA FILM when The EVAFILM are circling to be a roll.

MosquitoesMosquitoesMosquitoesMosquitoesThis is about the environment of EVA FILM factory; they should kill pests in workshop, and avoid other mosquitoes to comein.

BlackBlackBlackBlack SpotsSpotsSpotsSpotsThis is also about producing procedure in EVA FILM factory, the workers should wear gloves or wash hands often, to makesure when they touch the EVA FILM, and their hands are clean.

ForForForFor colorfulcolorfulcolorfulcolorful EVAEVAEVAEVA FILM,FILM,FILM,FILM, thethethethe colorcolorcolorcolor isisisis notnotnotnot evenevenevenevenIt’s about the procuring procedure of EVA FILM; maybe the procedure of mixing the colorant is not good enough.

KnockedKnockedKnockedKnocked marksmarksmarksmarksThis is caused in the transportation. The carrier is not carefully or the EVA FILM is not packaged by wooden boxes.

YellowingYellowingYellowingYellowing ofofofof EVAEVAEVAEVAIt’s about the formula of EVA FILM, which means the quality of the EVA FILM is not good. So you should buy small trialorder before you make big quantity order when you work with a new supplier.

ChinaChinaChinaChina’’’’ssss EVAEVAEVAEVA FILMFILMFILMFILM comparedcomparedcomparedcompared totototo JapanJapanJapanJapan’’’’ssss EVAEVAEVAEVA FILMFILMFILMFILMYes, EVA FILM was first implied in Japan, like Bridgestone. At that time, no other countries had used EVA FILM to laminateglass(Maybe i am wrong, welcome to correct me). Yes EVA has been used in others fields, like slipper and insider of cloth etc.Not many years later, EVA FILM as a hot melt adhesive film was introduced to China. but the quality is not very good at thattime.The EVA FILM is only used in decorative glass. Which mens the safety of EVA FILM is not trusted.But now in China, the EVA FILM after being modified by lots of times, are in good quality and be trusted in safety properties.And some European customers change the suppliers of EVA FILM to China suppliers, because EVA FILM in China is



inexpensive but at the some quality of EVA FILM in Japan.As we have compared EVA FILM in China and Japan.The visible light transmission and ultraviolet light blocked rate are as good as EVA FILM in Japan.Now the EVA Film is wildly used in Architectural Laminated Glass, Auto Glass, Privacy Glass(Switchable Glass), Safety Glassetc.And EVA Film perform better is the laminated glass is used in the environment of water, high humidity, chemical substancesetc.



Education

Knowledge of ethylene vinyl acetate eva interlayer film for laminated glass