Multiple resin system for rehabilitating pipe

A method of lining a conduit, comprising the steps of:

• positioning a flexible lining hose inside said conduit, said lining hose having an outer layer and a first resin absorbent layer containing a first liquid resin;
• placing a calibration hose inside the lining hose, said calibration hose having a second resin absorbent layer containing a second liquid resin;
• introducing pressurized fluid into the calibration hose wherein said first resin absorbent layer is disposed in substantial contact with said second resin absorbent layer, such that at least a portion of the first liquid resin mixes with at least a portion of the second liquid resin, said first and second resins remaining liquid upon mixing;
• initiating the curing of the first and second resins by introducing heated pressurized fluid into the calibration hose, wherein the first and second resins remain as liquids upon contact with each other, without substantial curing, until said heated pressurized fluid is introduced;
• and
• completing the curing of the first and second resins by continuing to introduce heated pressurized fluid into the calibration hose to provide a hardened unitary lining structure.

A method of lining a conduit comprising the steps of:

• positioning a flexible lining hose inside said conduit, said lining hose having a first resin absorbent layer which has been introduced with a volume of a high strength resin;
• expanding said lining hose to substantially an inner diameter of said conduit by inverting a calibration hose with fluid pressure inside said lining hose, said calibration hose having a second resin absorbent layer adjacent an impermeable membrane, said second resin absorbent layer of said calibration hose being saturated with a corrosion resistant resin, said fluid pressure being exerted directly against said impermeable membrane;
• and
• curing said high strength resin of said flexible lining hose and said corrosion resistant resin of said calibration hose until said lining hose and said calibration hose form a rigid liner.

A method of lining a conduit comprising the steps of:

• positioning a flexible lining hose inside said conduit, said lining hose having a first resin absorbent layer which has been introduced with a volume of a high strength resin selected from the group consisting of polyester, urethane, bisphenol A fumarate polyester, and isothpholic neopentol glycol;
• expanding said lining hose to substantially an inner diameter of said conduit by inverting a calibration hose with fluid pressure inside said lining hose, said calibration hose having a layer of a second resin absorbent material adjacent an impermeable membrane, said second resin absorbent layer of said calibration hose being saturated with a corrosion resistant resin selected from the group consisting of epoxy vinyl ester, urethane based vinyl ester, chlorendic anhydride, and epoxy;
• said fluid pressure being exerted directly against said impermeable membrane;
• and
• curing said high strength resin of said flexible lining hose and said corrosion resistant resin of said calibration hose by introducing a heated fluid into intimate contact with said impermeable membrane until said lining hose and said calibration hose form a rigid liner.

A method of lining a conduit comprising the steps of:

• positioning a flexible lining hose inside said conduit, said lining hose having a first resin absorbent layer which has been introduced with a volume of a high strength resin selected from the group of:
• polyester and isothpholic neopentol glycol polyester;
• expanding said lining hose to substantially an inner diameter of said conduit by inverting a calibration hose with fluid pressure inside said lining hose, said calibration hose having a layer of a second resin absorbent material adjacent an impermeable membrane, said second resin absorbent material adjacent an impermeable membrane, said resin absorbent layer of said calibration hose being saturated with a corrosion resistant resin selected from the group of:
• epoxy vinyl ester, urethane based vinyl ester, bisphenol A fumarate based vinyl ester, urethane based vinyl ester, chlorendic anhydride, and epoxy;
• said fluid pressure being exerted directly against said impermeable membrane;
• and
• curing said high strength resin of said flexible lining hose and said corrosion resistant resin of said calibration hose by introducing a heated fluid into intimate contact with said impermeable membrane until said lining hose and said calibration hose form a rigid liner.

A method of lining a conduit comprising the steps of:

• positioning a flexible lining hose inside said conduit, said lining hose having a first resin absorbent layer which has been introduced with a volume of a high strength resin having a flexural modulus of at least 250,000 p.s.i., a flex strength of at least 4,500 p.s.i., a tensile modulus of at least 250,000 p.s.i., and a tensile strength of at least 3,500 p.s.i. after curing;
• expanding said lining hose to substantially an inner diameter of said conduit by inverting a calibration hose with fluid pressure inside said lining hose, said calibration hose having a layer of a second resin absorbent material adjacent an impermeable membrane, said second resin absorbent layer of said calibration hose being saturated with a corrosion resistant resin which meets or exceeds chemical resistance and physical property requirements defined by ASTM F1216 and the Southern California Green Book after curing;
• said fluid pressure being exerted directly against said impermeable membrane;
• and
• curing said high strength resin of said flexible lining hose and said corrosion resistant resin of said calibration hose by introducing a heated fluid into intimate contact with said impermeable membrane until said lining hose and said calibration hose form a rigid liner.

A method of lining a conduit comprising the steps of:

• positioning a flexible lining hose inside said conduit, said lining hose having a first resin absorbent layer which has been introduced with a volume of a high strength resin including a filler material selected from the group consisting of:
• mineral fillers, silica, clay, styrene, divinl benzene, diallyl phthalate, vinyl tolene, and a vinyl substituted organic or organometallic module that will cure as part of a polymer network;
• expanding said lining hose to substantially an inner diameter of said conduit by inverting a calibration hose with fluid pressure inside said lining hose, said calibration hose having a layer of a second resin absorbent material adjacent an impermeable membrane, said second resin absorbent layer of said calibration hose being saturated with a corrosion resistant resin, said fluid pressure being exerted directly against said impermeable membrane;
• and
• curing said high strength resin of said flexible lining hose and said corrosion resistant resin of said calibration hose until said lining hose and said calibration hose form a rigid liner;
• wherein said second resin absorbent material comprises a non-woven felt of pentalobal fibers.