Method for manufacturing cured pipe lining material

Abstract

The present invention provides a method for producing a cured pipe lining material that suppresses the occurrence of curing defects and allows for the production of a cured pipe lining material with high mechanical strength. [Solution] A method for producing a cured pipe lining material, comprising the step of curing a pipe lining material (E) containing a composite material (D) comprising a resin composition and a fiber base material (d) by irradiating the resin composition with light emitted from a light-emitting diode element (I), wherein the resin composition comprises an ethylenically unsaturated group-containing resin (A), an ethylenically unsaturated group-containing monomer (B), and a photopolymerization initiator (C), and the extinction coefficient of the ethylenically unsaturated group-containing resin (A) is 0.30 cm in the wavelength range of 400 to 460 nm. -1 A method for manufacturing a cured pipe lining material, wherein the content of the fiber base material (d) in the composite material (D) is 50 to 65% by mass, the thickness of the pipe lining material (E) is 12 to 24 mm, and the light emitted from the light-emitting diode element (I) has a peak wavelength in the wavelength range of 400 to 460 nm.

Claims

1. A method for producing a cured pipe lining, comprising the step of curing a resin composition by irradiating a pipe lining material (E) containing a composite material (D) comprising a resin composition and a fiber base material (d) with light (i) emitted from a light-emitting diode element (I), The resin composition comprises an ethylenically unsaturated group-containing resin (A), an ethylenically unsaturated group-containing monomer (B), and a photopolymerization initiator (C). The extinction coefficient of the ethylenically unsaturated group-containing resin (A) is 0.30 cm in the wavelength range of 400 to 460 nm. -１ The following: The content of the fibrous base material (d) in the composite material (D) is 50 to 65% by mass. The thickness of the aforementioned pipe lining material (E) is 12 to 24 mm. The light (i) has a peak wavelength in the wavelength range of 400 to 460 nm. A method for manufacturing a cured pipe lining material, wherein the irradiance of the light (i) is 10% or more of the total irradiance of the light being irradiated.

2. The method for producing a cured pipe lining material according to claim 1, wherein the ethylenically unsaturated group-containing resin (A) is at least one selected from the group consisting of unsaturated polyester resin, vinyl ester resin, and urethane (meth)acrylate resin.

3. The irradiance of the aforementioned light (i) in the wavelength range of 300 to 1000 nm is 0.1 to 1000 mW / cm². ２ A method for producing a cured pipe lining material according to claim 1 or 2.

4. A method for producing a cured pipe lining material according to claim 1 or 2, wherein the irradiance of the light (i) in the 400 to 460 nm wavelength range is 10% or more of the irradiance in the 300 to 1000 nm wavelength range.

5. The extinction coefficient of the ethylenically unsaturated group-containing resin (A) is 0.25 cm⁻¹ in the wavelength range of 400 to 460 nm. -１ The method for producing a cured pipe lining material according to claim 1 or 2 is as follows:

6. A method for producing a cured pipe lining material according to claim 1 or 2, wherein the content of the ethylenically unsaturated group-containing resin (A) in the resin composition is 30.00% by mass or more.

7. A method for producing a cured pipe lining material according to claim 1 or 2, wherein the ethylenically unsaturated group-containing resin (A) is an unsaturated polyester resin.

8. The aforementioned unsaturated polyester resin is a reaction product of a diol (a1-1) and a dibasic acid (a1-2). The method for producing a cured pipe lining material according to claim 7, wherein the polybasic acid (a1-2) includes an ethylenically unsaturated dibasic acid (a1-2-1) and an ethylenically unsaturated dibasic acid (a1-2-2).

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