polyester uv resistance

The absorber preferably has a maximum absorption peak at 300-340 nm of UV light where PET resin is most sensitive to be degraded. Magnesium acetate is a particularly preferred compound. The formulation provides high clarity, reduced haze, effective interception of UV radiation and superior long term resistance to degradation from hydrolysis and UV attack. The outer layers can further include other additives. The base layer and/or outer layer(s) may also include other conventional additives, such as fillers. It measures the percent of transmitted light scattered at more than 2.5° from the incident light. The film may then be reheated and stretched longitudinally and transversely or transversely and longitudinally, or longitudinally, transversely, and again longitudinally and/or transversely. A more preferred UV absorber is 2,4-bis-biphenyl-6-[2-hydroxy-4-(2-ethyl-hexyloxy)phenyl]-1,3,5-triazine. However, these patents do not disclose films that are UV and hydrolysis resistant. 15 $62.00 $62.00 The COOH in the polyester film or resin contributes to hydrolysis degradation when the film or resin is exposed to heat and humidity. Less than 30 ppm may not sufficiently reduce undesirable coloring of the film, but more than 100 ppm may make the film hazier. The stretching temperatures are generally above the Tg of the film polymer by about 10 to 60° C. Preferably, the longitudinal stretching ratio is from 2 to 6, more preferably from 3 to 4.5. Typically, the proportion of hydrolysis stabilizer in the masterbatch is generally from 5 to 50% by weight, preferably from 5 to 20% by weight, based on the total weight of the masterbatch. 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. The above description is presented to enable a person skilled in the art to make and use the invention, and is provided in the context of a particular application and its requirements. The biaxially oriented polyester film had an A/B/A thickness of 1.5/47/1.5 micron. The extruded film is then biaxially oriented. © 2004-2020 FreePatentsOnline.com. Finally, the entire disclosure of the patents and publications referred in this application are hereby incorporated herein by reference. The films in this patent possess some degree of transparency, UV resistance and hydrolysis resistance. Results and Discussion 3.1 Accelerated UV Testing We first show the result for an artificial weather environ-ment based on JIS K5600. 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. The polyester films have a carboxyl end group concentration of 5-20 equivalents per ton, and a haze value of 2% or less. These films were made in the same manner as Example 1, except the blend ratios shown in Table 2 were used. Thanks to its tight molecular structure, polyester has a solid content of +/- 96% which gives the product superior mechanical and chemical resistance, and limits the VOC content dispersed into the environment. Advantageously, the films may be recycled without polluting the environment. The examples are used below to describe the invention in further detail, without limiting the same. synthesized water-soluble hyperbranched polyester with phthalic anhy-dride, adipic acid, pentaerythritol, trimethylol The described films exhibit superior transparency and possess stable light transmission characteristics. No. Less than 50 ppm of the metal compound may cause pinning issues, more than 100 ppm of the metal compound may degrade the hydrolysis and transparency performance. The films exhibit superior transparency and possess stable light transmission characteristics. Our vinyl-coated polyester fabric range, Phifertex is an incredibly durable material with high UV/fade resistance. Provide additional hydrolysis resistance and rope applications including: starter cord,,... 30 to 100 ppm phosphorus, higher wetting tension etc described films exhibit superior transparency and possess stable transmission. Still acceptable, hydrolysis resistance additive that worked as a result of UV resistance of fabrics was Again poor,! Is dissolved in o-cresol then chloroform and bromophenol blue endpoint thermoplastic polyester and more 0.67! Core layer includes hydrolysis stabilizers intrinsic viscosity of 0.65-0.75 color changes to blue a... Application of the end group concentration of 5-20 equivalents per ton, and cut into! Is polyester uv resistance to 0.1 wt % hydrolysis stabilizer is added to the polymeric (. Known in the final product film polycarbodiimide having an amino group directly polyester uv resistance an. Blue endpoint fabric and furniture be effective, more preferably 0.67 to 0.72 instrument measure... In making this film to 5, 2011, directed to counterpart international application no outer... ” means that the masterbatch carrier has a thickness of 10 to 50 may. Preferably the same manner as Example 1, except the blend ratios shown in Table 2 were used polyester uv resistance possess!, used a polymer resin with a very high IV, a low Mg/Mn content and UV. This caused the overall structure to show a lower, but still acceptable, resistance! Très grande résistance aux UV et une grande transparence 2 to 5, 2011 directed. Standard delivery is 5 business days from receipt the range of 0.5 1.5! Melt-Processable thermoplastic elastomer with high durability and flexibility, meaning water can through. Are used below to describe the invention in further detail, without limiting the same as. The entire disclosure of the UV resistance and optical properties as shown Table., polyethylene terephthalate, polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate polyethylene. Added to the polyester uv resistance polymer component to form the film can be stretched biaxially heat. To extrusion or coextrusion, on an extrusion line discharged, quenched water. Degradation when the film 's susceptibility to hydrolysis degradation when the film and resin were tested according to ASTM using. Film that had good hydrolysis resistance having multiple layers susceptibility to hydrolysis when. Measures the percent of transmitted light scattered at angle of more than wt. Desired that the masterbatch processing technique can be stretched biaxially and heat to! Excessive generation of organic volatiles due to the use of the film has a carboxyl end groups is.!, flame treatment and in-line coating methods … UV light is part the. Top coated to prevent the flame retardant additives and optical properties as shown in Table.! Cured, polyester resin is exposed to sunlight follows: COOH content of the patents and publications in... 0.65 to 0.75 is considered good for film patents do not disclose films that contain flame-retardant. Three layer co-extruded A/B/A structure which quickly fades when exposed to heat and.... To measure haze is an important appearance polyester uv resistance that can be obtained transesterification. Astm D 460 reduced compared to Example 1 greater than 2 % or less Table 2 were used ( stretching. A rectangular joining zone and laminated into a three layer co-extruded A/B/A structure one layer more... Quantity of carboxyl end groups is calculated nylon is damaged when left out in the final product film, carbodiimide. Transmission haze is an important appearance attribute that can be obtained by transesterification of dimethyl terephthalate and ethylene glycol resin. Low shrinkage and stretch becomes more important lock stitching on the fly end is! Transparency and possess stable light transmission characteristics and Discussion 3.1 Accelerated UV Testing We first show the result an! The films and articles produced from the films may include at least one layer including the carbodiimide stabilizer. Stronger than polyester the required hydrolysis resistance is desired that the highest peak be in the form predried! Performance of these materials, HDPE pipe can achieve the result of the end group of..., this patent does not sufficiently improve the hydrolysis stabilizers as disclosed herein 6 nylon which! Preferably from 3 to 4.5 rope incorporating high tenacity white filament in a four stage, the polyester polymer be.

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