High performance geosynthetic article
A product and performance technology, applied in the field of high-performance geosynthetic products, can solve problems such as medium strength, high creep tendency, high CTE, etc.
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example 1
[0290] Example 1: Compatibilized polymer compositions according to the invention, and strips and welded strips formed therefrom.
[0291] Step 1: Functionalization of HDPE
[0292] 1000 g of polyethylene resin Dowlex manufactured by DOW TM , 1.2 grams of dicumyl peroxide and 15 grams of maleic anhydride dry mix. The mixture was fed into the main hopper of a co-rotating twin-screw extruder with a screw speed of 100 to 200 RPM and an aspect ratio L / D of 40, and melt-kneaded at 180°C to 220°C until a functionalized polymer was obtained . This polymer is used as self-compatibilizer in this example and is denoted MA-PE.1 in the following.
[0293] Step 2: Compounding of Hydrolysis Stabilizing and UV Protecting Compounds
[0294] 500 grams of MA-PE.1, 500 grams of PA6 resin Ultramid manufactured by BASF TM B50L01 was put into a co-rotating twin-screw extruder with a screw speed of 100-300 RPM and an aspect ratio L / D of 40, and melt-kneaded at 280°C. 180 grams of Talc Iotalk Su...
example 2
[0301] Example 2: Composition according to US Patent No. 6,875,520, its strips and welded strips (which serve as comparative examples, not examples according to the invention).
[0302] Step 1: Functionalization of Ethylene-Methyl Acrylate Copolymer
[0303] 1000 grams of ethylene-methyl acrylate copolymer Lorty made by Arkema TM 29MA03, 1.2 grams of dicumyl peroxide and 15 grams of maleic anhydride were dry blended. The mixture was put into a co-rotating twin-screw extruder and melt-kneaded at 220° C. until a functionalized polymer was obtained. This polymer is used in this example as a self-compatibilizer, which is denoted hereinafter as MA-LOT.1.
[0304] Step 2: Compounding of PA-MA.LOT.1 compound
[0305] 500 grams of MA-LOT.1, 500 grams of PA6 resin Ultramid manufactured by BASF TM B50L 01 was put into a co-rotating twin-screw extruder, and melt-kneaded at 280°C. The compound was extruded and then pelletized by a strand pelletizer and dried at 45°C.
[0306] The r...
example 3
[0314] Example 3: Compatibilized polymer composition according to the invention, its strips and welded strips with improved thermal stability and improved puncture resistance at -20°C
[0315] Step 1: Compounding of Hydrolysis Stabilizing and UV Protecting Compounds
[0316] 200 grams of LLDPE made by Bondyram 4001 maleated by Polyram, LLDPE resin LL1001 made by 200 grams of ExxonMobil TM , 300 grams of Exact manufactured by ExxonMobil TM 203 elastomer, 300 grams of secondary crushed PET obtained from beverage bottles, 2 grams of heat stabilizer Irganox manufactured by Ciba TM B900, 5 grams of CYASORB manufactured by Cytec Corporation TM UV-4042 and 5 grams of Tinuvin manufactured by Ciba TM 494, put into a co-rotating twin-screw extruder, and melt kneaded at 280°C. The compound was extruded, pelletized by a strand pelletizer, and dried at 45°C.
[0317] The resulting product (hereinafter referred to as CB.3) was extruded to form a strip 1.5 mm thick and 150 mm wide.
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