Method for detecting thermal insulation performance of building reflective thermal insulation coating (flat coating)

A technology of reflective thermal insulation coating and detection method, applied in the field of coatings, can solve problems such as detection data difference, and achieve the effect of simple detection method

Inactive Publication Date: 2019-04-19
镇江泛华检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that there is a difference between the detection data of the existing architectural reflective heat-insula...

Method used

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  • Method for detecting thermal insulation performance of building reflective thermal insulation coating (flat coating)
  • Method for detecting thermal insulation performance of building reflective thermal insulation coating (flat coating)
  • Method for detecting thermal insulation performance of building reflective thermal insulation coating (flat coating)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 A method for detecting thermal insulation performance of architectural reflective thermal insulation coating (flat coating), including the following steps:

[0026] Step (1): Use a reflectance tester to test the reflectance of the black and white cardboard to ensure that the reflectance of the substrate is within the range of the reflectance of the blackboard <1% and the reflectance of the whiteboard (80±2)%;

[0027] Step (2): The coating is made into a film by using a wire rod coater, and the model of the wire rod coater is RDS65#;

[0028] Step (3): Place the coated film in a constant temperature and humidity room for 7 days to achieve the best test state;

[0029] Step (4): Use a digital micrometer to confirm that the film thickness is 50 microns;

[0030] Step (5): Use an ultraviolet-visible-near-infrared spectrophotometer to test the near-infrared reflectance of the coating;

[0031] Step (6): According to the hiding power calculation formula, calculate the near-in...

Embodiment 2

[0032] Embodiment 2 A method for detecting thermal insulation performance of architectural reflective thermal insulation paint (flat coating), including the following steps:

[0033] Step (1): On the basis of the test board of Example 1, use the wire rod coater to make the coating film again, and the model of the wire rod coater is RDS65#;

[0034] Step (2): Place the coated film in a constant temperature and humidity room for 7 days to achieve the best test state;

[0035] Step (3): Use a digital micrometer to confirm that the coating film thickness is 100 microns;

[0036] Step (4): Use an ultraviolet-visible-near-infrared spectrophotometer to test the near-infrared reflectance of the coating;

[0037] Step (5): According to the hiding power calculation formula, calculate the near-infrared hiding power of the coating.

Embodiment 3

[0038] Embodiment 3 A method for detecting thermal insulation performance of architectural reflective thermal insulation paint (flat coating), including the following steps:

[0039] Step (1): On the basis of the test board of Example 2, use the wire rod coater to make the coating for the third time, and the wire rod coater model is RDS65#;

[0040] Step (2): Place the coated film in a constant temperature and humidity room for 7 days to achieve the best test state;

[0041] Step (3): Use a digital micrometer to confirm that the coating film thickness is 100 microns;

[0042] Step (4): Use an ultraviolet-visible-near-infrared spectrophotometer to test the near-infrared reflectance of the coating;

[0043] Step (5): According to the hiding power calculation formula, calculate the near-infrared hiding power of the coating.

[0044] The specific test results of Examples 1-3 are as follows:

[0045]

[0046] In summary, since the energy in sunlight mainly comes from near infrared, which accou...

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Abstract

The invention relates to a method for detecting the thermal insulation performance of a building reflective thermal insulation coating (flat coating). The method is mainly characterized in that an ultraviolet-visible-near infrared spectrophotometer is used for measuring the near-infrared reflectance of the reflective thermal insulation coating on a black and white cardboard; the principle is thatthe coating has a transmission phenomenon in the near-infrared, which results in a difference in the near-infrared reflectance of the coating on a whiteboard and blackboard of the cardboard. In this way, the hiding power of the coating can be obtained by using a hiding power calculation formula. The insulation temperature difference of the coating is measured by using the same coating, and it is confirmed that the thermal insulation temperature difference and near-infrared hiding power of the coating are linearly proportional. Guidance can be provided for the actual use of the reflective thermal insulation coatings on the wall. It is avoided that high-reflectance coating obtained during laboratory testing does not achieve the desired thermal insulation effect in practical application.

Description

Technical field [0001] The invention relates to the technical field of coatings, in particular to the detection of the effect of the heat insulation performance of a building reflective heat insulation coating (flat coating) in practical application. Background technique [0002] As the country advocates the implementation of energy-saving and environmental protection industrial policies, especially building energy-saving, which involves a wide range of areas, it is getting more and more attention. The introduction of the new national standard of GB / T 25261-2018 "Reflective Thermal Insulation Coatings for Building" has strongly promoted the development of reflective thermal insulation coatings. At present, the performance testing of reflective thermal insulation coatings (solar reflectance, near-infrared reflectance and hemispherical emissivity) still use aluminum plates as the test substrate for testing, because near-infrared rays are also linearly transmitted like visible light...

Claims

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Application Information

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IPC IPC(8): G01N21/359
CPCG01N21/359
Inventor 王镇王玲廖向阳罗蛟马鹏飞
Owner 镇江泛华检测科技有限公司
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