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Abrasion resistant flexible composites and multilayer pipe liners for cured-in-place pipe

A composite material, multi-layer pipe technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of transportation, wear, and inability to transport.

Pending Publication Date: 2020-05-08
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, CIPP technology can be subject to a high degree of wear and tear on existing pipes used to transport slurries or other abrasive particle streams
Current CIPP technology may not be able to transport sandy water-based slurries (such as ore slurries), petroleum-based slurries, and / or solvent-based slurries
Existing pipes may also be subjected to high temperature applications where the pipe transports high temperature materials and / or is subjected to environmental conditions that may lead to premature mechanical failure of the pipe
Current CIPP technology may not be adequate for conveying such slurries or other streams of abrasive particles at elevated temperatures such as in excess of 60°C (140°F)

Method used

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  • Abrasion resistant flexible composites and multilayer pipe liners for cured-in-place pipe
  • Abrasion resistant flexible composites and multilayer pipe liners for cured-in-place pipe
  • Abrasion resistant flexible composites and multilayer pipe liners for cured-in-place pipe

Examples

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Effect test

example 1

[0145] The following were blended in a weight ratio of 50:15:35 to form the composition: ultra-high molecular weight ethylene-based polymer having a weight average molecular weight of 8,000,000 grams / mole, a density of 0.925 g / cc, and an intrinsic viscosity of 28 dL / g, and the average particle size D50 is 150μm (UTEC TM 6541, available from Braskem, Brazil); a polyethylene resin comprising a first molecular weight ethylene-based polymer component and a second molecular weight ethylene-based polymer component (DGDA-2420NT, density =0.940g / cc, high load melt index I 21 =9.5g / 10min, melt index I2 is 0.15g / 10min, and Mw / Mn is 9, available from U.S. Dow Chemical Company); and thermoplastic polyolefin elastomer (INFUSE TM 9010, ethylene / α-olefin interpolymer, density=0.877g / cc, melt index I2=0.5g / 10min, Mw / Mn is 2.6, available from Dow Chemical Company, USA). The composition was mixed with 600 ppm of fluoropolymer processing aid (melt flow index (265° C., 5 kg) at 10 g / 10 minut...

example 2

[0151] The following were blended in a weight ratio of 50:15:35 to form the composition: ultra-high molecular weight ethylene-based polymer having a weight average molecular weight of 8,000,000 grams / mole, a density of 0.925 g / cc, and an intrinsic viscosity of 28 dL / g, and the average particle size D50 is 150μm (UTEC TM6541, available from Brasco, Brazil); a polyethylene resin comprising a first molecular weight ethylene-based polymer component and a second molecular weight ethylene-based polymer component (DGDA-2420NT, density=0.940 g / cc , high load melt index I 21 =9.5g / 10min, melt index I2 is 0.15g / 10min, and Mw / Mn is 9, available from U.S. Dow Chemical Company); and thermoplastic polyolefin elastomer (ENGAGE TM 7387, ethylene / α-olefin interpolymer, density = 0.870 g / cc, melt index I2 = 0.5 g / 10 min, available from Dow Chemical Company, USA). The composition was mixed with 600 ppm of fluoropolymer processing aid (melt flow index (265° C., 5 kg) of 10 g / 10 min (Dynamar ...

example 3

[0157] The following were blended in a weight ratio of 50:30:20 to form the composition: an ultra-high molecular weight ethylene-based polymer having a weight average molecular weight of 8,000,000 grams / mole, a density of 0.925 g / cc, and an intrinsic viscosity of 28 dL / g, and the average particle size D50 is 150μm (UTEC TM 6541, available from Brasco, Brazil); a polyethylene resin comprising a first molecular weight ethylene-based polymer component and a second molecular weight ethylene-based polymer component (DGDA-2420NT, density=0.940 g / cc , high load melt index I 21 =9.5g / 10min, melt index I2 is 0.15g / 10min, and Mw / Mn is 9, available from U.S. Dow Chemical Company); and thermoplastic polyolefin elastomer (INFUSE TM 9010, ethylene / α-olefin interpolymer, density = 0.877 g / cc, melt index I2 = 0.5 g / 10 min, available from Dow Chemical Company, USA). The composition was mixed with 600 ppm of fluoropolymer processing aid (melt flow index (265° C., 5 kg) at 10 g / 10 minutes (...

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Abstract

Embodiments of the present disclosure include composites and flexible multilayer pipe liners comprising a fibrous layer; and a polyolefin backing layer comprising a blend of: (a) an ultra-high molecular weight ethylene-based polymer having an intrinsic viscosity from 5 to 50 deciliters / gram, (b) a polyethylene resin comprising a first molecular weight ethylene-based polymer component and a secondmolecular weight ethylene-based polymer component, wherein the polyethylene resin has a density from 0.930 to 0.960 g / cc; (c) a thermoplastic polyolefin elastomer having a density of from 0.850 to 0.910 g / cc; and (d) optionally, a fluoropolymer.

Description

technical field [0001] Embodiments described herein relate generally to flexible composite materials and flexible multilayer pipe liners, and methods for forming flexible multilayer pipe liners. Such flexible multilayer pipe liners, flexible composites and methods can be used in cured-in-place pipe repair methods for pipes requiring higher wear resistance and thermal properties. Background technique [0002] Underground sewer, drinking water and other pipes break with use and age. Repairing these leaking and damaged tubes is time consuming and expensive as it usually involves digging and replacing the damaged tubes. [0003] One solution is to use cure-in-place pipe (CIPP) technology. CIPP may involve saturating a flexible non-woven felt mat with a curable thermoset composition, subsequently inverting the saturated non-woven felt mat into an existing (body) tube, and saturating it within the body tube by applying hot water, UV light, or steam. The felt backing is cured. ...

Claims

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Application Information

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IPC IPC(8): B32B5/02B32B27/06B32B27/08B32B27/12B32B27/14B32B27/30B32B27/32B32B1/08
CPCB32B5/02B32B5/022B32B27/06B32B27/08B32B27/12B32B27/14B32B27/30B32B27/32B32B27/322B32B1/08B32B2250/02B32B2260/021B32B2260/046B32B2262/02B32B2262/0276B32B2270/00B32B2274/00B32B2307/30B32B2307/546B32B2307/554B32B2307/72B32B2597/00B32B2323/04C08L23/06C08L23/0815C08L2205/025C08L2205/035C08L2207/068C08L2207/04
Inventor D·常S·R·阿瑟瑞娅
Owner DOW GLOBAL TECH LLC