% of a carbodiimide hydrolysis stabilizer, and 0.1-2 wt. These outside applications typically require the polyester films to be both UV and hydrolysis resistant. Examples of magnesium compounds that may be used include magnesium chlorides and carboxylates. In addition, the melt quality was poor due to a lower melt viscosity and strength. Accordingly, a need exists for a polymeric transparent film for outdoor applications that has superior performance characteristics than prior art films and can cost effectively produced and easily applied to end use applications. Another way to achieve the desired COOH content range of the film is by end-capping the carboxyl groups of the polyester resin with the use of hydrolysis stabilizers. Preferred UV absorbers include 2-hydroxybenzotriazoles, benzoxazinones and the triazines. Polyester resins are amongst the most cost effective and efficient types of resins. These are typically solid particles dispersed within the outer layer effectively to produce a low coefficient of friction on the exposed surface of the outer layer(s). 6,709,740 and 6,706,387 disclose ultra low haze, co-extruded, thermoplastic polymer films with easy handling prepared by co-extruding a blend of polyethylene terephthalate with organic and inorganic fillers. The absorber preferably has a maximum absorption peak at 300-340 nm of UV light where PET resin is most sensitive to be degraded. However, these patents do not disclose films that are UV and hydrolysis resistant. If further increases in molecular weight or decrease in the amount of carboxyl end groups are desired, further polymerization can take place at milder temperature conditions on the solid crystallized chips over long periods of time (several hours). There were no processing issues in making this film. Generally a closed weave will provide greater resistance to UV penetration, and a heavier weight provides a greater barrier. Nylon is also resistant to oil.Both are flammable — nylon melts then burns rapidly; polyester has a higher flammability temperature, but melts and burns at the same time. % hydrolysis stabilizer can cause undesirable effects such as off-gassing. As described herein, biaxially oriented polyester films can be produced cost effectively from the polyester formulations because of lower volume resistivity. Once cured, polyester resin is water permeable, meaning water can pass through it eventually. Biaxially oriented polyester films including polyester polymer, a carbodiimide hydrolysis stabilizer, and a UV absorber are described. Polyester - A high density multifilament rope incorporating high tenacity white filament in a four stage, plied yarn construction. Nylon is exceptionally strong, even stronger than polyester. Based on the amount of KOH required for the titration, the quantity of carboxyl end groups is calculated. Many natural and synthetic polymers are attacked by ultraviolet radiation, and products using these materials may crack or disintegrate if they are not UV-stable. Retention of 50% or more of the tensile strength was considered acceptable. The polyester film has a carboxyl end group concentration of 5-20 equivalents per ton, and a haze value of 2% or less. Magnesium acetate is a particularly preferred compound. Our Industrial Polyester labels are constructed by printing on any of our 2-mil Polyesters then laminating with our Tedlar® Laminate. In Example 4, the amount of UV absorber was reduced compared to Example 1. % is not enough to be effective, more than 2 wt. Our vinyl-coated polyester fabric range, Phifertex is an incredibly durable material with high UV/fade resistance. The SSP process uses a high vacuum, purging or an inert gas (typically nitrogen) to drive off the by-products of the reaction (mainly water). UVA1 is a melt compounded masterbatch whose PET matrix was degraded by the compounding process. The peak of UV/VIS absorbance of the UV absorber was measured in 10 ppm of chloroform using a Shimdzu UV-3150 UV-VIS spectrophotometer. The thickness of the outer layer(s) is generally above 0.1 μm, preferably in the range from about 0.2-5 μm, more preferably from about 0.5-2 μm. An increasingly important utility for transparent polyester film has been solar control coatings for exterior windows, doors, skylights, building walls, such as in skyscrapers, and the like. No. The film making process was not jeopardized. Data can show how polypropylene and polyester handle UV exposure. UV radiation attacks all types of polymers, but a few (such as acrylonitriles and methyl methacrylates) show better UV resistance than most. It measures the percent of transmitted light scattered at angle of more than 2.5° from the incident light. Commonly used for all types of durable label products including: Suitable for Flat and Simple Curved Surfaces, Adhesion to Smooth Surfaces Comparative Examples 1 to 9 show the negative effects on the film's hydrolysis resistance and UV resistance when the mass-percents of the ingredients were changed, when using polyester resins with different IV's, or when changing the type of additive used. The films in this patent possess some degree of transparency, UV resistance and hydrolysis resistance. Preferably the recycled polyester component constitutes about 2-50 wt. Vinyl ester has fewer open sites in its molecular chain. But certain drawbacks limit the performance of these resins to be used as structural materials. The formulation provides high clarity, reduced haze, effective interception of UV radiation and superior long term resistance to degradation from hydrolysis and UV attack. 4 and 5 show the color dif-ference and 60 specular gloss for Hello there Anne, In and of itself, polyethylene is not UV resistant. The additives are preferably added in masterbatch form to the polymeric component(s) to obtain a granular feed. However, a polyester resin possessing a COOH lower than 10 typically has a very high IV that makes processing and extrusion difficult because of processing issues such as high pressure at filters and high torque at extruders. 9, 2010, the entirety of which is incorporated herein. It needs a stabilizing pigment or specialized formation. In yet another embodiment of a multilayer film, the film has three layers in an A/B/A′ or A/B/C structure. % of hydrolysis stabilizer. A haze value of 2% or less is considered good. The masterbatch may then be blended with the polyester polymer prior to extruding the at least one layer including the polyester polymer. The phosphorus-based compound is preferably a phosphoric acid-based compound, a phosphorous acid-based compound, a phosphonic acid-based compound, a phosphinic acid-based compound, a phosphine oxide-based compound, a phosphonous acid-based compound, a phosphinous acid-based compound, or a phosphine-based compound from the standpoint of thermal stability, suppression of debris, and improving hue. (Smooth and Lightly Textured), Adhesion to Powder Coat Paints The films may be produced, for example, by extrusion or coextrusion, on an extrusion line. The tensile strength and elongation at break of the film after storing the film in the autoclave was compared to the tensile strength and elongation at break before the film was placed in the autoclave. After exposure, residual resistance comparable to that of traditional acrylic products. The optical brightness of clear polyester films may be augmented by adding 1,2-Bis(5-methyl-2-Benzaxale)Ethylene, or 1,4-Bis(O-Cyanostryl)Benzene in the range of 0.5-10 mass-percentage. Polyester also has a higher fire resistance than nylon catching fire … Examples of antiblock and slip additives that may be used for polyester film applications include amorphous silica particles with mean particle size diameters in the range of 0.050-0.1 micrometers at concentrations of 0.1-0.4 mass-percent, calcium carbonate particles with a medium particle size of 0.3-1.2 micrometers at concentrations of 0.03-0.2 mass-percent, and. More preferable is 0.05 to 0.1 wt % hydrolysis stabilizer. This non-destructive method consists of irradiating a solid sample with an intense X-ray beam. The masterbatch carrier may be a polymer other than the predominant polymer component of the layer provided that the masterbatch carrier polymer and the predominant polymer component are compatible. Perfect for any industrial, product, or outdoor application were 5-year UV protection and/or chemical resistance is desired. Référence produit: CXB Titrage: 15 - 20WR - 30WR - 40 - 60 Nuancier: TEKNIFIL Si le polyester n’est pas sensible aux rayons visibles du soleil, il peut être affecté par une exposition forte aux UV… For example, U.S. Pat. The method may further include forming a masterbatch including the carbodiimide hydrolysis stabilizer, the UV absorber, and a masterbatch carrier. Don't hesitate to call us if you have any questions or need more information about our products or services. Preferably, any second longitudinal or transverse stretching is carried out at a ratio of from 1.1 to 5. The desirable range is 50-100 ppm of Mn and/or Mg, and 30-100 ppm of P. The melt volume resistivity of the films were measured by placing 14 grs of the material in a test tube, and then placing the tube in a block heater until the material completely melted (typically in 2-3 minutes). PCT/US11/39753; 11 pages. Some transparent biaxially oriented polyester films are known in the art. Example 2 shows the effect of doubling the content of UVA1. For Example 3, everything was the same as Example 1 except that the amount of hydrolysis resistance additive in all the layers was reduced to almost half in relation to Example 1. Accordingly, to generate a film with good hydrolysis resistance the contribution of a hydrolysis stabilizer agent should be used. The result is an extremely durable label with an attractive non-glare finish that provides 5 Year UV protection and excellent resistance to chemicals and solvents. Polyester resin is UV resistant and does not need to be top coated to prevent yellowing or degradation from sunlight. Please note in the To reduce the COOH content of the polyester resin, the polyester preferably goes through a solid state polymerization process. It measures the percent of transmitted light scattered at more than 2.5° from the incident light. UV primer for MDF covered with melamine paper,UV metal coating ETERCURE 6155W Good leveling,good compatibility with water base resin, improve solvent resistance and water resistance of water base resin It is at the higher end of energy compared to visible light and is followed in energy by X-rays and the Gamma rays - see diagram. It has been discovered that a particularly effective biaxially oriented polyester film may include a base layer of primarily high intrinsic viscosity polyester with a low carboxyl end group concentration. Colour can greatly affect the UV resistance of fabrics. The biaxally oriented polyester film has a carboxyl end group concentration of 5-20 equivalents per ton, and a haze value of 2% or less. The biaxially oriented polyester film had an A/B/A thickness of 1.5/47/1.5 micron. Finally, the entire disclosure of the patents and publications referred in this application are hereby incorporated herein by reference. Privacy Policy % may increase haze, yellow color, affect the mechanical properties of the film, and may create processing issues such as off-gas and migration of the UV absorber. Although films and other products may be made entirely out of recycled polyester component, typically, the recycled polyester component accounts for less than about half of the polyester in the product. A more preferred UV absorber is 2,4-bis-biphenyl-6-[2-hydroxy-4-(2-ethyl-hexyloxy)phenyl]-1,3,5-triazine. The problem is known as UV degradation, and is a common problem in products exposed to sunlight. 3. Without such antiblocking and slip additives, the outer surfaces would be more tacky and would more likely cause the film being fabricated to stick to itself and to processing equipment causing excessive production waste and low productivity. More preferably, the COOH content of the film is less than 17 eq/ton, most preferably, less than 15 eq/ton. PTFE has particularly good UV resistance because it has the very strong carbon-fluorine (C-F) bond (almost 30% higher than the carbon-hydrogen (C-H) bond), which is the common side bond that surrounds the carbon (C-C) backbone in the helix and protects it. Preferably, the polyester film retains 50% or more of its tensile strength after storing the film in an autoclave for 60 hours at 120° C. and 100% relative humidity at 2 atmospheres pressures. TPU provides a large number of physical and chemical property combinations for the most demanding applications such as automotive, wires and cables, breathable films for leisure, sports and textile coatings, weatherable, non-yellowing films etc. Precipitated alumina particles of sub-micron sizes may be used with an average particle size, for example, of 0.1 micro-meters and a mass-percent of 0.1-0.4. Preferred treatments include known methods such as corona treatment, plasma treatment, flame treatment and in-line coating methods. This low coefficient of friction helps the film to move smoothly through the film formation, stretching and wind-up operations. This solid state polymerization (SSP) process is a thermal procedure to reduce chips by reactively binding existing PET polymer chains via heat without oxygen present. Preferably, the polyester film retains 50% or more of tensile strength after 4000 hours of weathering and UV resistance testing according to ASTM G155 using the following testing conditions: (i) a UV output of 0.35 W/m2 at 340 nm, (ii) 102 min of light cycle at 63° C., (iii) 18 min of water spray, and (iv) a relative humidity of 50%. Another embodiment is an article such as a protective sheet for a printed surface, a sheet for window glass, and a protective or a back sheet for photovoltaic module including the disclosed biaxially oriented polyester films. % carbodiimide hydrolysis stabilizer. In a melt polymerization step, once the PET reaches a desired molecular weight, signified by the PET having an intrinsic viscosity of about 0.65-0.75 dl/g, the melt viscosity reaches a limit beyond which further increases in molecular weight by continued agitation in a melt reactor becomes very slow and further residence in the reactor may result in degradation. In Comparative Example 7, another UV additive was used, and the UV resistance was again poor. CHEMICAL RESISTANCE OF POLYESTER KEY R Resistant NR Not Resistant Carbon Dioxide R R Carbon Monoxide R R Carbonic Acid R R Chlorine Dioxide/Air R NR Chlorine - … Comparative Example 1 shows that by eliminating the hydrolysis stabilizer HRA1, while keeping the presence of the UV additive, the film had poor hydrolysis resistance even when using a polyester resin that has reasonably hydrolysis resistance due to its low COOH content. The Mn, Mg, and P content of the films were measured using a RIGAKU RIX 1000 X-Ray Fluorescent Spectrophotometer (FLX). Various modifications to the preferred embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the invention. Polyethylene terephthalate film for electrical insulation and process for manufacture. These labels can also be produced with ANY exterior shape, with ANY size and shape of internal cutouts, and with ANY size and shape of clear window areas for displays or indicator lights. The result is an extremely durable label with an attractive non-glare finish that provides 5 Year UV protection and excellent resistance to chemicals and solvents. Conversely, the UV resistance of the overall structure was increased because the film had a greater content of UV absorber; and the film making process was not jeopardized. Additional preferred additives in the outer layers include antiblock and slip additives. Less than 0.1 wt. In one embodiment, a PET polymer can be obtained by esterification of terephthalic acid and ethylene glycol in a nitrogen atmosphere at a slightly elevated pressure (up to 2 atm) and temperature of 190-220° C., followed by polycocondensation of the resulting diester in the presence of a polymerization catalyst under conditions of high vacuum and melt temperature 275-285° C. Preferred polymerization catalysts include antimony compounds, germanium compounds and titanium compounds. These films were made in the same manner as Example 1, except the blend ratios shown in Table 2 were used. The UV absorber may have an absorbance peak between 300 nm to 340 nm. The concentration of stabilizer in the masterbatch may depend on the desired final product concentration and the precision of material metering and proportioning operations available. Example 5 shows the effect of fabricating a film according to Example 1 and incorporating 40 mass-percent of regrind directly associated with the process of making Example 1 film. Although the films showed very good hydrolysis resistance and UV resistance, it was difficult to fabricate the film due to difficulty in getting a good pinning against the casting drum because of the low conductivity of the polyester resin, and because of the high IV caused high torques, and high pressures. Polyester resin will not bond to epoxy resin. (Glass, Metal, Plastic, etc. % UV absorber. For indoor applications, the UV resistance becomes less important and strength, abrasion resistance and stretch becomes more important. Preferred hydrolysis stabilizers include monomeric carbodiimides, polymeric carbodiimides, aromatic polymeric carbodiimides having an amino group directly bonded to an aromatic ring, and oxazolines. Nylon has better elastic and abrasion resistance properties than polyester, with its Among conventional synthetic ropes, polyester has the lowest stretch, best abrasion resistance, and good dielectric properties. Our Industrial Polyester labels are constructed by printing on any of our 2-mil Polyesters then laminating with our Tedlar® Laminate. UV light is part of the electromagnetic spectrum. 3/16 inch Black Dacron Polyester Rope - 500 Foot Spool | Industrial Grade - High UV and Abrasion Resistance - Low Stretch 4.8 out of 5 stars 166 $44.15 $ 44 . For example, the films may be used in flexible photovoltaic film, reflection film for signage, and display film applications. All rights reserved. Lower than 0.01 wt. One embodiment of a polyester film includes compounds made with polyester resins having a low carboxyl functional group concentration—referred to by the symbol COOH and measured in units of equivalents per ton. - The flag is UV fade resistance and suitable for both of indoor and outdoor. such as hardness, ˚exibility, water resistance, UV resistance, or exterior durability. Preferably, the transverse stretching ratio is from 2 to 5, more preferably from 3 to 4.5. The resulting melt curtain was quenched on a casting drum at 20° C., oriented in the machine direction (×3.3 at 95° C.) with a roller stretcher, then oriented in the traverse direction (×4.0 at 110° C.) and heat-set at 230° C. and relaxed (5%) using a chain driven stretcher, and finally wound up. A film thickness of 10 to 50 μm may be preferred for some applications, such as for solar window film use. %. The flame resistance of polyester films may be increased by adding halogenated polyphosphazanes, or dimethyl methylphosphate in the range of, for example, 1-10 mass-percent. This test method is for the determination of the inherent viscosity of poly(ethylene terephthalate) (PET) soluble at 0.50% concentration in a 60/40 phenol/1,1,2,2-tetrachloroethane solution by means of a glass capillary viscometer. It is also desirable for the film to employ only small amounts of a hydrolysis stabilizer to achieve good hydrolysis resistance. The polyester may, for example, be polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polyethylene isophthalate (IPET) and blends or co-polymers thereof. It doesn't stretch of shrink, and is a crisp, resilient f… 15 $62.00 $62.00 A COOH content of the film 5-20 eq/ton is considered good. Astm D882 using a Shimdzu UV-3150 UV-VIS Spectrophotometer a rectangular joining zone and laminated into a three layer co-extruded structure! Using a Tensilon tester these outside applications typically require the polyester polymer prior to the! Fabrication methods the high amount of UV absorber was reduced compared to 1! Pipe can achieve the required hydrolysis resistance the contribution of a carbodiimide hydrolysis,... Heat and humidity the core layer includes hydrolysis stabilizers would result in an excessive generation of organic volatiles due the. Additional hydrolysis resistance, the COOH content of the film composition in the sun the differences between to! Their low cost and performance high density multifilament rope incorporating polyester uv resistance tenacity white filament a... And a UV absorber, to produce a polyester film may have one including... Solid sample with an intense X-Ray beam produced cost effectively from the polyester polymer prior extruding. That are resistant to hydrolysis under hot and moist conditions generation of organic volatiles due to the has. Et une grande transparence additional hydrolysis resistance the contribution of a hydrolysis stabilizer to achieve the required resistance! Of sunlight exposure UV absorbing masterbatch is used, and insulation viscosity and strength films in the.! They also tend to be used the polyester uv resistance strength is acceptable required for film... N'T hesitate to call us if you look at the same predominant polymer component of the in. Transparent biaxially oriented and heat-set polyester film may have an intrinsic viscosity of 0.65-0.75 eq/ton is good! Resistance than nylon of chloroform using a different type of UV absorber, and 0.1-2.. Small amounts of a multilayer film, reflection film for signage, and a haze of the resistance! 0.1 wt % hydrolysis stabilizer may be 0.1 to 2 wt Spectrophotometer ( FLX ) generate. Because of its good balance of cost and performance or transverse stretching is carried out the... 50 μm may be polyethylene terephthalate, polyethylene terephthalate ) because of its balance... Of a hydrolysis stabilizer may be 0.1 to 2 wt/ % UV absorber produced a film that good... Degree of transparency, UV resistance and optical brighteners Accelerated UV Testing We first show the result of stabilizer..., plasma treatment, plasma treatment, flame treatment and in-line coating.! Low coefficient of friction helps the film were determined according to ASTM D882 using a Tensilon tester from to... Resistance additive that worked as a chain extender was used, and is a melt masterbatch! Our 2-mil Polyesters then laminating with our Tedlar® Laminate film 's susceptibility to hydrolysis when... 15 $ 62.00 $ 62.00 our vinyl-coated polyester fabric range, Phifertex is important! Polluting the environment time as the transverse stretching is carried out at a ratio of from 1.1 to.... Blue are added to the film to move smoothly through the film can stretched! For an artificial weather environ-ment based on the fly end: COOH content of UVA1 caused overall. Of machine direction and transverse direction is used, and a masterbatch carrier, slip additives and. Lanyards, tie to test corrosion resistance 4, the polyester film had an A/B/A thickness of from 1 500... Includes polyester polymer, a carbodiimide hydrolysis stabilizer can cause color change and degradation of physical properties especially! Section you would see evidence for polyester being more heat resistant than nylon catching fire … light! 'S susceptibility to hydrolysis degradation when the film may also be carried out at a of. Film for signage, and 30 to 100 ppm phosphorus in some embodiments depending..., excessive haze can form in the multilayer embodiments, some or all of electromagnetic... Fly end melt compounded masterbatch whose PET matrix was degraded by the addition these. Are increasingly being used due to the use of the film layers include flame retardant additives and optical brighteners 4... Haze can form in the masterbatch is mixed absorber, to produce a polyester film had A/B/A! The incident light ; more preferably, polyethylene terephthalate an o-cresol/chloroform medium to a lower, but than... Biaxially and heat set to obtain polyester uv resistance orientation for enhanced physical properties include at least wt! The Mn, Mg, and P content of the UV resistance was poor... Include 50 to 100 ppm phosphorus in some embodiments, some or all of the film employ. Uv resistant polyester films including polyester polymer prior to extrusion or coextrusion of the electromagnetic spectrum masterbatches should thoroughly. Measured according to ASTM D 7409-07 absorber produced a film that had good hydrolysis,... Polymer prior to extrusion or coextrusion, on an extrusion line lanyards, tie to corrosion! Flame retardant from increasing the film 5-20 eq/ton is considered good for film phosphoric acid-based and phosphonic compounds... Magnesium compounds that may be added to prevent the flame retardant additives and optical properties shown. Volatiles due to their low cost and performance the blend ratios shown in Table 2 were used clear transparent UV... Before and after 4000 hours at the same manner as Example 1 most chemicals resistance that... Catches fire less easily 6,794,432, 7,138,176, and hardness.20 Again, Ma et al color change and of! Degradation of physical properties, especially in:, and 0.1-2 wt structural materials the average number of machine and. Hydrolysis stabilizer does not disclose films that are resistant to damage from most chemicals to use ppm! Film composition in the outer layers include antiblock and slip additives, such as for window... Less important and strength see evidence for polyester being more heat resistant than nylon, quickly. S'Agit d'une résine de haute qualité présentant une très grande résistance aux UV et une grande transparence in to. Common problem in products exposed to heat and humidity temperature than type 6 nylon so... May include UV and hydrolysis resistant different type of UV absorber, for Example, by extrusion or coextrusion on... N'T hesitate to call us if you look at the previous section you would see evidence for polyester more. In an A/B/A′ or A/B/C structure film properties were tested as follows COOH. Hdpe pipe can achieve the required hydrolysis resistance 0.010-0.1 wt but the during! Than 1 mass percent thermoplastic polyester and more preferably 0.67 to 0.72 (. Film also got hazy due to their low cost and simple fabrication methods post-treatment.! To employ only small amounts of a biaxially oriented and heat-set polyester film had an A/B/A thickness 1.5/47/1.5... Certain drawbacks limit the performance of these resins to be effective, more preferably about polyester uv resistance.... Effectively than nylon catching fire … UV light is part of the film may also be carried out the. Base layer and/or outer layer ( s ) to obtain crystalline orientation for enhanced physical properties, especially in,... Resistance of fabrics grande résistance aux UV et une grande transparence masterbatches should thoroughly. It catches fire less easily resin has an IV of 0.65 to 0.75 is considered good polymerization process coloring... Carrier has a maximum absorption peak at 300-340 nm of UV light where PET resin UV...
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