polyester uv resistance

December 6, 2020 in Uncategorized

Comparative Example 6 shows that using a different type of UV absorber produced a film having good hydrolysis resistance but poor UV resistance. Polyester also has a higher fire resistance than nylon catching fire … The film may have an intrinsic viscosity of 0.65-0.75. Polyester is known for its strength, durability, and low shrinkage and stretch. % recycled polyester polymer. © 2004-2020 FreePatentsOnline.com. The polyethylene terephthalate resin pellets and masterbatch additives listed in Tables 1-1 to 1-4 were mixed according to the blend ratio shown in Table 2 and dried to less than 100 ppm moisture content, then extruded at a temperature of 285° C. for the outer layers A. The extruded film is then biaxially oriented. Cette résine UV a été spécialement développée pour éviter une décoloration à … It further relates to the use of the film and to a process for its production. Comparative Example 8 shows that when a very large amount of recycle was used the hydrolysis resistance, the UV resistance, and the film making process are compromised. 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… %. The Mn, Mg, and P content of the films were measured using a RIGAKU RIX 1000 X-Ray Fluorescent Spectrophotometer (FLX). Results and Discussion 3.1 Accelerated UV Testing We first show the result for an artificial weather environ-ment based on JIS K5600. This caused the overall percent of hydrolysis resistant PET to increase, making the film more hydrolysis resistant, but the reduced presence of the UV absorber caused the UV resistance of the film to be lower. In addition, the melt quality was poor due to a lower melt viscosity and strength. 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. 15 $62.00 $62.00 Instrument : Cary UV-Vis Wavelength range : 280.00 - Agilent 400.00 nm SBW : 4.0 nm Scan speed : 900.000 nm/min Number of scans : 8 ref 4 white woven polyester 1 UPF= 21.0 ref 4 white woven polyester … Polyethylene terephthalate polyester resin pellets and masterbatch additives listed in Tables 1-1 to 1-3 were mixed according to the blend ratio shown in Table 2 and dried less than 100 ppm moisture content, then extruded at the temperature of 285° C. for the core layer B. Coating bare window materials with solar transparent polyester control films is a technique for reducing the adverse effects of sunlight exposure. Among conventional synthetic ropes, polyester has the lowest stretch, best abrasion resistance, and good dielectric properties. A haze value of 2% or less is considered good. 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. UV light is part of the electromagnetic spectrum. A transesterification catalyst, such as Li, Ca, Mn, Mg, Zn or Pb acetate, is used in the ester interchange step to produce the diester. Toray Plastics (America), Inc. (N. Kingstown, RI, US), 264/165, 264/171.1, 264/176.1, 264/288.4, 264/290.2, 428/195.1, 428/201, 428/430, 428/910, 528/308, 528/308.1, 528/308.6. These outside applications typically require the polyester films to be both UV and hydrolysis resistant. At that stage, the polymer is discharged, quenched in water, and cut down into amorphous chips. The additives are preferably added in masterbatch form to the polymeric component(s) to obtain a granular feed. Due to the heat history, the recycled material had a PET matrix that was degraded in reference to the virgin PET, and the recycle caused the hydrolysis resistance to be the lowest of all the examples, and the UV resistance was not as good as the prior examples. PCT/US11/39753; 11 pages. 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. Film properties were tested as follows: COOH content of the film and resin were tested according to ASTM D 7409-07. Comparative Example 3, used a polymer resin with a very high IV, a low Mg/Mn content and a poor melt conductivity. 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. Colour stability and fastness guaranteed. The biaxially oriented polyester film had preferable UV, hydrolysis resistance and optical properties as shown in Table 2. Polyester resin is UV resistant and does not need to be top coated to prevent yellowing or degradation from sunlight. The film may then be reheated and stretched longitudinally and transversely or transversely and longitudinally, or longitudinally, transversely, and again longitudinally and/or transversely. 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. 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. 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. Preferably, the masterbatch carrier is a thermoplastic polyester and more preferably, polyethylene terephthalate. An IV of 0.65 to 0.75 is considered good for film. 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. Polyester also resists UV much more effectively than nylon, which quickly fades when exposed to sunlight. Methods of making the films and articles produced from the films are also described. 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 next step of the polymerization proceeds in the same way as in the diacid-based process, utilizing a high vacuum and the presence of an antimony, titanium or germanium based catalyst. Commonly used for all types of durable label products including: Suitable for Flat and Simple Curved Surfaces, Adhesion to Smooth Surfaces Retention of 50% or tensile strength is acceptable. Haze of the films was measured according to ASTM D1003. The content of UV absorber may be 0.1 to 2 wt. The UV absorber may have an absorbance peak between 300 nm to 340 nm. 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. For example, the films may be used in flexible photovoltaic film, reflection film for signage, and display film applications. The ester interchange step takes in a nitrogen atmosphere at atmospheric pressure and a temperature of 190-220° C. At the end of the transesterification step, signified by the total removal of the methanol byproduct, a phosphorus compound is added to deactivate the transesterification catalyst. % of a carbodiimide hydrolysis stabilizer, and 0.1-2 wt. A suitable instrument to measure haze is GARDNER HAZE-GUARD PLUS #475. 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). 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. Preferably, the polyester film includes 0.1 to 2 wt/% UV absorber; more preferably in the range of 0.5 to 1.5%. But if you look at the previous section you would see evidence for polyester being more heat resistant than nylon. The films in this patent possess some degree of transparency, UV resistance and hydrolysis resistance. Find out the differences between them to determine which to use. U.S. Pat. Examples of magnesium compounds that may be used include magnesium chlorides and carboxylates. More than 0.1 wt. Chez Polyestershoppen, vous pouvez acheter tout ce qui colle, y compris de la résine époxy UV de RESION. Nylon is exceptionally strong, even stronger than polyester.

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