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These standards apply to most papermaking auxiliaries (liquid or solid):
| Testing items | Standard number and name | Scope of application |
|---|---|---|
| appearance | Visual method (commonly used enterprise standards) | all |
| Solid content (non-volatile matter) |
GB/T 2793-2014 Determination of Non volatile Matter Content in Adhesives (Reference) GB/T 6284-2006 Determination of Moisture in Chemical Products - Dry Loss Method |
Water soluble additives |
| PH value | GB/T 6368-2008 Surface active agents Determination of pH in aqueous solutions | 1% or specified concentration |
| Viscosity (dynamic viscosity) |
GB/T 10247-2008 Viscosity Measurement Method (Rotation Method/Capillary Method) Or GB/T 15357-2014 Determination of viscosity of surfactants |
Liquid additives |
| density | GB/T 4472-2011 Determination of Density and Relative Density of Chemical Products | liquid |
| Ash content (burnt residue) | GB/T 7531-2008 Determination of Burning Residue in Organic Chemical Products | Suitable for organic additives |
| water-insoluble substance | GB/T 9738-2008 General Method for Determination of Water Insoluble Substances in Chemical Reagents | Impurities in liquid additives |
| Standard Number | Standard Name | key metrics |
|---|---|---|
| GB/T 21927-2008 | Wet strength agent for papermaking, polyamide polyamine epichlorohydrin (PAE) | Solid content, viscosity pH、 Residual amount of chloropropanol (toxic substance produced by hydrolysis of epichlorohydrin) |
| QB/T 4084-2010 | Supplement to the standard for polyamide polyamine epichlorohydrin (PAE), a wet strength agent used in papermaking? | Actual GB has been covered |
| Determination of Chloropropanol (1,3-DCP, 3-MCPD) | GB/T 21927-2008 Appendix (Gas Chromatography Method) | Toxic by-products |
| Standard Number | Standard Name | Key Metrics |
|---|---|---|
| QB/T 4086-2010 | Dry strength agent cationic polyacrylamide for papermaking | Solid content, viscosity, cationic degree pH、 Molecular weight (viscosity method), residual monomer (acrylamide) |
| GB/T 29345-2012 | Starch based dry strength agents for papermaking (if modified starch, please refer to GB 28402-2012)? ） | Actual starch products often use enterprise standards, citing GB/T 8885 for edible corn starch, etc |
| GB/T 12008.3-2009 Partial Testing | Unsaturation in Polyether Polyols (Used for CPAM Additives) | less commonly used |
Key point: Cationic polyacrylamide (CPAM) is used as a dry strength agent/retention aid, and its residual acrylamide monomer detection is carried out according to GB/T 22301-2008 (using liquid chromatography method).
| Standard Number | Standard Name | Test content |
|---|---|---|
| QB/T 4088-2010 | Cationic polyacrylamide as a retention aid for papermaking | Similar to dry strength agents, adding water filtration performance testing (dynamic water filtration instrument method) |
| When there is no single standard, refer to GB/T 31246-2014 | Technical conditions and test methods for cationic polyacrylamide as a water treatment agent | Applicable to CPAM, but cited in the paper industry |
| Application performance evaluation | GB/T 2677.10-1995 or Enterprise Method (Determination of Dynamic Retention Rate) | Retention rate, white water concentration |
| Standard Number | Standard Name | indicator |
|---|---|---|
| QB/T 4155-2010 | Sizing agent for paper making AKD lotion | Solid content pH、 Viscosity, particle size, charge, storage stability, hydrolysis rate |
| QB/T 4156-2010 | Sizing agent for paper making -- Alkenyl succinic anhydride (ASA) lotion | Same as above, and check the anhydride content |
| QB/T 4157-2010 | Rosin based sizing agent | Solid content, free rosin, dispersibility, sizing degree (paper testing) |
| Paper adhesive testing |
GB/T 460-2008 Determination of Paper Glue Size (Ink Marking Method) GB/T 5405-2002 Determination of paper sizing degree (liquid penetrant method) |
Used for evaluating finished paper products |
| Standard Number | Standard Name | content |
|---|---|---|
| QB/T 4085-2010 | Defoamer for papermaking | Appearance, solid content pH、 Density, defoaming speed, and foam suppression performance (measured by gas bubble method or circulation method) |
| General defoamer standard | GB/T 26527-2011 Organic Silicon Defoamer | The paper industry can also refer to |
| Standard Number | Standard Name | remark |
|---|---|---|
| GB/T 31246-2014 | Cationic polyacrylamide as a water treatment agent | Covering molecular weight, cation degree, solid content, residual monomers |
| ** GB/T 17514-2017** | Water treatment agent polyacrylamide (universal) | Yin, non -, and cationic |
| Flocculation performance test | Enterprises shall refer to the GB/T 16881-2008 coagulation and sedimentation test method on their own | Evaluate the effectiveness of clarified water |
| Standard Number | Standard Name | Testing items |
|---|---|---|
| QB/T 4087-2010 | Paper making fungicide | Content of active ingredients (such as isothiazolinone, glutaraldehyde, etc.) pH、 Density and sterilization rate (suspension quantitative method) |
| GB/T 26368-2010 | Water treatment agent isothiazolinone derivatives | partially applicable |
| Standard Number | Standard Name | indicator |
|---|---|---|
| QB/T 4089-2010 | Surface sizing agents for papermaking - styrene acrylic esters | Appearance, solid content pH、 Viscosity, ionicity, film-forming properties, hydrophobicity (contact angle) |
| Testing items | Standard number and method | Applicable additives |
|---|---|---|
| Residual acrylamide monomer | GB/T 22301-2008 Liquid Chromatography Method | CPAM, PAM class |
| Chloropropanol (3-MCPD, 1,3-DCP) | GB/T 21927-2008 Appendix (Gas Chromatography Mass Spectrometry) | PAE wet strength agent |
| Epichlorohydrin (ECH) | GB/T 14454.10-2008 or gas chromatography method | Wet strength agent, crosslinking agent |
| free formaldehyde |
GB/T 2912.1-2009 Textiles - Determination of Formaldehyde (Acetylacetone Method, Reference) Or GB/T 6324.6-2014 Determination of Trace Formaldehyde in Organic Chemical Products |
Formaldehyde based resins (such as UF, MF) |
| methanol | GB/T 17931-2018 Gas Chromatography Method | Alcohol containing solvents |
| Volatile Organic Compounds (VOCs) | GB/T 23986-2009 (Gas Chromatography Method) | Solvent type or lotion type |
| Heavy metals (Pb, Cr, As, Hg, etc.) | GB/T 30799-2014 (Atomic Absorption/ICP Method) | All additives (for food packaging paper) |
| Adsorbable Organic Halides (AOX) | GB/T 15959-1995 (Microcoulometric Method) | Containing chlorinated chemicals |
Although most of them belong to the category of "paper testing", they are used to evaluate the effectiveness of additives:
| test project | Standard/Reference Method | explanation |
|---|---|---|
| Dynamic water filtration performance | Quoting from QB/T 4088-2010 or TAPPI T 261 (Canadian standard free CSF difference method) | Evaluate retention and filtration aids |
| Retention rate (once/total retention) | Dynamic retention method (enterprise/laboratory), refer to GB/T 2677.10 | Determination of ash content or filler content in pulp and white water |
| Glue application degree (HST or Cobb value) |
GB/T 22364-2018 (Cobb value) GB/T 5405-2002 (Liquid Penetrating Method) GB/T 460-2008 (Ink Marking Method) |
Evaluation of the effectiveness of sizing agents |
| Paper strength (tensile strength, tear resistance, tearing resistance) |
GB/T 12914 (Tensile) GB/T 454 (Durable) GB/T 455 (Tear) |
Dry/wet strength agent effect |
| Wet strength (wet tensile strength) | GB/T 465.2-2008 Determination of Wet Tensile Strength of Paper and Paperboard | Wet strength agent evaluation |
| Contact angle (water contact angle) | GB/T 30447-2013 | Evaluate the water resistance of surface adhesive |
| Zeta potential (slurry) | Electrophoresis method (equipped with Zeta potential meter as standard) | Used to optimize the charge matching of additives |
The light industry standard (QB/T) is the main source of papermaking additives; GB/T Recommended General Methods for National Standards; For certain new additives that do not have industry standards, reference can be made to the chemical industry standards (HG/T) or enterprise standards (which require filing).
The TAPPI method (such as T 262 dynamic retention rate), ISO 5269 series (sheet making), and SCAN method are commonly used in the international paper industry, but in China, national or industry standards are usually preferred for testing.
In the additives of food contact paper, they also need to comply with GB 9685-2016 (Standard for the Use of Additives in Food Contact Materials) and its corresponding migration detection.
| Types of additives | Suggest testing standard combination |
|---|---|
| PAE wet strength agent | GB/T 21927-2008 (full) Residual moisture tensile strength of chloropropanol (application test) |
| Cationic PAM retention aid | QB/T 4088 or GB/T 31246 Residual Acrylamide (GB/T 22301) Dynamic Filtration Test |
| AKD sizing lotion | QB/T 4155 Particle Size Analysis Storage Stability (Glue Size after Thermal Aging) |
| defoamer | QB/T 4085 Defoamer Speed (Laboratory Gas Blowing Method) |
| fungicide | QB/T 4087 Sterilization rate (quantitative suspension method) Active ingredient content |
Tel: 0755-82828582
Phone: 13728818899
Email: ata@certata.com
Address: Room 403, 4th Floor, Qianhai Zhichuang Technology Industrial Park, No. 60 Nanchang Road, Nanchang Community, Xixiang Street, Bao'an District, Shenzhen
Phone: 0755-82828582
Mobile phone: 13728818899
Email: ata@certata.com
