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JC/T 1074-2021 English PDF (JCT1074-2021)

JC/T 1074-2021 English PDF (JCT1074-2021)

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JC/T 1074-2021: Purificatory performance of coatings with air pruification

This Document specifies the classification and marking, requirements, test methods, result calculations, test reports and inspection rules of indoor air purification coatings. This Document applies to indoor air purification coatings.
JC/T 1074-2021
JC
BUILDING MATERIAL INDUSTRY STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
ICS 91.100
CCS Q 10
Replacing JC/T 1074-2008
Purificatory Performance of Coatings with Air Purification
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ISSUED ON: DECEMBER 02, 2021
IMPLEMENTED ON: APRIL 01, 2022
Issued by: Ministry of Industry and Information Technology of the PEOPLE Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 6
4 Classification and Marking ... 7
4.1 Classification ... 7
4.2 Marking ... 7
5 Requirements ... 7
6 Test Methods ... 8
6.1 Test environmental conditions ... 8
6.2 Test instruments and reagents ... 8
6.3 Gas collection and analysis ... 9
6.4 Sampling ... 9
6.5 Test substrate ... 9
6.6 Preparation of test sample plate ... 9
6.7 Purificatory efficiency ... 10
6.8 Purification durability ... 10
7 Calculation of Results ... 10
8 Test Report ... 10
9 Inspection Rules ... 11
9.1 Inspection requirements ... 11
9.2 Batching and sampling ... 11
9.3 Judgment ... 11
Appendix A (Normative) Test Cabin System ... 12
Appendix B (Normative) Test Method for Purificatory Performance of Non- Photocatalytic Air Purification Coatings ... 16
Appendix C (Normative) Test Method for Purificatory Performance of Photocatalytic Air Purification Coatings ... 18
Purificatory Performance of Coatings with Air Purification
1 Scope
This Document specifies the classification and marking, requirements, test methods, result calculations, test reports and inspection rules of indoor air purification coatings. This Document applies to indoor air purification coatings.
2 Normative References
The provisions in following documents become the essential provisions of this Document through reference in this Document. For the dated documents, only the versions with the dates indicated are applicable to this Document; for the undated documents, only the latest version (including all the amendments) is applicable to this Document.
GB/T 3186 Paints Varnishes and Raw Materials for Paints and Varnishes - Sampling GB/T 9271 Paints and Varnishes Standard Panels for Testing
GB/T 16129 Standard Method for Hygienic Examination of Formaldehyde In Air of Residential Areas - Spectrophotometric Method
GB/T 18883 Indoor Air Quality Standard
3 Terms and Definitions
For the purposes of this Document, the following terms and definitions apply. 3.1 Air purification
The behavior of reducing the target pollutants in indoor air that affect human health and making the air clean.
3.2 Air purification coating
The coating that can reduce or remove one or more targeted pollutants from indoor air. 3.3 Purificatory efficiency
Under the specified test conditions, the ability of the coating to reduce the concentration of formaldehyde (or toluene) in the cabin.
3.4 Purification durability
Under the specified test conditions, after the indoor air purification coating is applied several times with the specified concentration of formaldehyde (or toluene) within the specified period (or time), the ability of the material?€?s continuous purification against the target pollutant. 4 Classification and Marking
4.1 Classification
4.1.1 Products are divided into interior decoration (Class I) and treatment (Class II) according to their uses; Class I is further divided into water-based liquid coatings (IS) and powder inorganic coatings (IF)according to the coating form.
4.1.2 According to the principle of purification, the products are divided into coatings with non- photocatalytic air purification function (Class W) and coatings with photocatalytic air purification function (Class G).
4.2 Marking
Products shall be marked in order of product name, document number, coating category, and purification principle.
EXAMPLE: water-based liquid coatings of interior decoration with non-photocatalytic air purification function shall be marked as follows:
JC/T 1074-2021-IS-W
5 Requirements
The indoor air purification coatings should meet the requirements in Table 1 for the purificatory performance against certain target pollutants.
6.2.3 Micro-syringe: Volume range 5??L, division value 0.1??L.
6.2.4 Pollution source reagents: 37%~40% formaldehyde solution (analytical pure); toluene (analytical pure).
6.3 Gas collection and analysis
6.3.1 The collection and concentration analysis of formaldehyde gas shall be carried out in accordance with the methods specified in GB/T 16129.
6.3.2 The collection and concentration analysis of toluene gas shall be carried out according to the method specified in GB/T 18883.
6.4 Sampling
The product shall be sampled according to the method stipulated in GB/T 3186, and the sampling volume shall be determined according to the test requirements. 6.5 Test substrate
Use a glass plate with a size of 500 mm ?? 500 mm, and its surface treatment shall be carried out in accordance with the method specified in GB/T 9271.
6.6 Preparation of test sample plate
6.6.1 For Class IS materials, after stirring the product evenly, according to the coating amount provided by the manufacturer, evenly and fully coat the sample on one side of the four glass plates; and carry out the test after natural drying for 7 days in the laboratory environment in 6.1.1. If the manufacturer does not provide the coating amount, the total coating amount of Class IS materials should be (250 ?? 2) g/m2.
6.6.2 For Class IF materials, prepare samples according to the requirements of the product instructions. If the tested product specifies the range of powder to water ratio, the middle value shall be taken. According to the coating amount provided by the manufacturer, evenly and fully coat the sample on one side of the four glass plates, and conduct the test after 7 days of natural drying in the laboratory environment in 6.1.1. If the manufacturer does not provide the coating amount, the total coating amount (dry powder material) of Class IF materials should be (1.6??0.1) kg/m2.
6.6.3 For Class II materials, after stirring the product evenly, spray the sample evenly on one side of the four glass plates according to the spraying amount provided by the manufacturer, and conduct the test after drying it naturally for 24 hours in the laboratory environment in 6.1.1. If the manufacturer does not provide the spraying amount, the spraying amount of Class II materials should be (60 ?? 2) g/m2.
6.7 Purificatory efficiency
6.7.1 See Appendix B for the test method of purificatory efficiency of coatings with non- photocatalytic air purification.
6.7.2 See Appendix C for the test method of the purificatory efficiency of coatings with photocatalytic air purification.
6.8 Purification durability
6.8.1 See Appendix B for the test method of purification durability of coatings with non- photocatalytic air purification.
6.8.2 See Appendix C for the test method of purification durability of coatings with photocatalytic air purification.
7 Calculation of Results
7.1.1 See Appendix B for the calculation of the purificatory efficiency and purification durability of coatings with non-photocatalytic air purification.
7.1.2 See Appendix C for the calculation of the purificatory efficiency and purification durability of coatings with photocatalytic air purification.
8 Test Report
The test report shall include the following:
a) The name, type, proportion, coating amount, manufacturer or sample sending organization, and test date of the sample;
b) Test conditions, including lab and test cabin temperature, relative humidity and other sampling environmental conditions;
c) For samples of coatings with non-photocatalytic air purification, indicating the target pollutant type, purificatory efficiency, purification durability and test cycle times; d) For samples of coatings with photocatalytic air purification, indicating the type of light source, type of target pollutant, purificatory efficiency, purification durability and test cycle times;
e) Any circumstances that may affect the results.
Appendix B
(Normative)
Test Method for Purificatory Performance of Non-Photocatalytic Air
Purification Coatings
B.1 Overview
This appendix specifies the test methods for evaluating the performance of non-photocatalytic air purification coatings to remove the gaseous target pollutants (formaldehyde or toluene), including purificatory efficiency and purification durability.
B.2 Preparation of test
Select two test cabins under the test environment conditions specified in 6.1, and seal the test cabins. Test the concentration of target pollutants (formaldehyde or toluene) in the air in the test cabins respectively. If the concentration of target pollutants (formaldehyde or toluene) in each cabin is less than or equal to 0.02mg/m3, the test can continue. If the concentration of target pollutant (formaldehyde or toluene) is greater than 0.02mg/m3, effective cleaning measures shall be taken until the requirements are met before continuing the test. B.3 Purificatory efficiency
B.3.1 Prepare two test cabins, one for sample cabin, the other for comparison cabin; put the 4 prepared test sample plates and 4 blank glass plates into the sample holders in the sample cabin and comparison cabin, respectively; place one side of the plate coated with sample towards the center of the cabin.
B.3.2 After connecting the gas generator to the test cabin and confirming, seal the test cabin; turn on the stirring fan, and set the speed to (15??1) r/s.
B.3.3 Use a 5??L micro-syringe to pipette (3??0.1) ??L of pollutants into the gas generator; turn on the gas generator and start timing; turn off the gas generator and stirring fan till 2h; and collect and analyze the target pollutant concentration (n2h) in the comparison cabin at the same time. After the collection is completed, continue to turn on the stirring fan for 24h; collect the gas in each cabin and test the target pollutant concentration; turn off the fan when collecting the gas; and obtain the final concentration of the target pollutant in the comparison cabin (n24h) and the final concentration of the target pollutant in the sample cabin (n1). B.4 Purification durability
B.4.1 If the purificatory efficiency test result is unqualified, a retest can be carried out. If the retest is qualified, the purification durability test can be continued. If the retest is unqualified, Appendix C
(Normative)
Test Method for Purificatory Performance of Photocatalytic Air
Purification Coatings
C.1 Overview
This appendix specifies the test methods for evaluating the performance of photocatalytic air purification coatings to remove gaseous target pollutants (formaldehyde or toluene), including purificatory efficiency and purification durability.
C.2 Preparation of test
Select three test cabins under the test environment conditions specified in 6.1, and seal the test cabins. Test the concentration of target pollutants (formaldehyde or toluene) in the air in the test cabins respectively. If the concentration of target pollutants (formaldehyde or toluene) in each cabin is less than or equal to 0.02 mg/m3, the test can continue. If the concentration of target pollutant (formaldehyde or toluene) is greater than 0.02mg/m3, effective cleaning measures shall be taken until the requirements are met before continuing the test. C.3 Purificatory efficiency
C.3.1 Number the prepared three test cabins respectively as No.1 sample cabin, No.2 sample cabin and comparison cabin. Put the prepared two sets of test sample plates (each with an area of 1m2) into the sample holders in the No.1 sample cabin and the No. 2 sample cabin; place the side of the sample plate coated with the sample facing the center of the cabin; and seal the two sample cabins. Put four blank glass plates into the sample holder in the comparison cabin; and seal the comparison cabin.
C.3.2 After connecting the gas generator to the test cabin and confirming, seal each test cabin; turn on the stirring fan, and set the speed to (15??1) r/s.
C.3.3 Turn on the light source (UV lamp or LED lamp) in the No. 1 sample cabin; and keep the No. 2 sample cabin and the comparison cabin without light.
C.3.4 Use a 5??L micro-syringe to pipette (3??0.1) ??L pollution source; inject it into the gas generator; turn on the gas generator and start timing; turn off the gas generator and stirring fan after 2h; and collect and analyze the concentration of target pollutants (n2h) in the comparison cabin at the same time. After the collection is completed, continue to turn on the stirring fan for 24h; collect the gas in each cabin and test its concentration; turn off the fan when collecting the gas; and then obtain the final concentration of the target pollutant in the comparison cabin (n24h) and the final concentration of the target pollutant in the No. 1 sample cabin (ny1) and the final

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