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◉ Introduction of Adhesives
Adhesive: A class of natural or synthetic, organic or inorganic substances that can connect two or more parts or materials together through interfacial adhesion and cohesion, collectively referred to as adhesives , customarily referred to as glue. In short, an adhesive is a substance that binds the adherends together through adhesion. "Adhesive" is a general standard term that also includes some other glues, mastic, mucilage, plasters, etc.
Adhesive is also called adhesive, which is what we usually call glue. Adhesives contain a lot of harmful substances, such as volatile organic compounds, benzene, toluene, xylene, formaldehyde, free toluene diisocyanate, and volatile organic compounds, which may cause environmental pollution and damage human health.
◉ Adhesive Classification
According to the different dispersion medium and content in the adhesive products, the adhesives are divided into three categories: solvent-based adhesives, water-based adhesives, and bulk-based adhesives. Typically, water-based adhesives are low VOC adhesives.
Solvent-based adhesives: adhesives with volatile organic solvents as the main dispersion medium
Water-based adhesives: adhesives with water as the main dispersion medium
Bulk type adhesive: adhesive with dispersion medium content within 5% of the total
◉ Control Standards
"Limits of volatile organic compounds in adhesives" GB 33372-2020
◉ Control Items
VOC content, benzene series (benzene, toluene and xylene), halogenated hydrocarbons (dichloromethane, 1,2-dichloroethane, 1,1,1-trichloroethane, 1,1,2-trichloroethane ethane), toluene diisocyanate, free formaldehyde, etc.
◉ Test Process:
|
Material Type |
Specific Material |
VOC Restriction Requirements |
Testing Method |
Test Process and Equipment |
Moisture Test |
|
solvent based adhesive |
Neoprene |
600g/L |
GB 33372-2020 Appendix A |
1.1. Amino resin adhesive (100±2)℃, (180±5)min 2. Phenolic resin adhesive (135±2)℃, (60±2)min 3. Other adhesives (105±2)℃, (180±5)min |
Moisture meter |
|
Styrene-butadiene-styrene block copolymer rubbers |
500g/L |
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|
Polyurethane |
250g/L |
||||
|
Acrylates |
510g/L |
||||
|
other kind |
250g/L |
||||
|
water-based adhesive |
Polyethyl acetate |
50g/L |
Appendix D of GB 33372-2020 |
GC-FID |
/ |
|
polyvinyl alcohol |
|||||
|
rubber |
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|
Polyurethane |
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|
Vinyl acetate-ethylene copolymer emulsion |
|||||
|
Acrylates |
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other |
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|
Body type adhesive |
Silicone |
100g/kg |
GB 33372-2020 Appendix E |
1..Amino resin adhesive (105±2)℃, (180±5)min 2. Phenolic resin adhesive (135±2)℃, (60±2)min 3. Other adhesives (105±2)℃, (180±5)min |
/ |
|
MS class |
50g/kg |
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Polyurethane |
50g/kg |
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polysulfides |
50g/kg |
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Acrylates |
200g/kg |
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epoxy resin |
50g/kg |
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thermoplastic |
50g/kg |
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other |
50g/kg |
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|
α-Cyanoacrylic acid |
20g/kg |
HG/T 2492-2018 |
|
/ |
◉ Compliance Services
As a professional third-party testing technology service provider, Jiayu Testing boasts qualifications such as CMA, CNAS, CBTL, and CPSC. Additionally, we have obtained laboratory accreditation from multiple authoritative certification bodies both domestically and internationally. Our laboratory is constructed and managed in strict accordance with standards, equipped with advanced instruments and equipment, and staffed by a skilled and professional technical team. We possess extensive industry service experience and robust testing technical capabilities, are proficient in various regulatory standards, and assist enterprises in actively responding to regulatory requirements, effectively enhancing product compliance. Welcome to contact us. Jiayu Testing's consultation hotline is: 400-9269-886!
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