GB/T 24328.13-2025Tissue paper and tissue products - Part 13: Determination of disintegration (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is Part 13 of GB/T 24328 "Toilet Paper and its Products". GB/T 24328 has already published the following parts.

---Part 1: Terminology Guidelines;

---Part 2: Determination of thickness, laminate thickness, apparent laminate density and bulk;

---Part 3: Determination of tensile strength, elongation at maximum force, and tensile energy absorption;

---Part 4: Determination of wet tensile strength;

---Part 5: Quantitative Determination;

---Part 6: Determination of water absorption time and capacity using the basket immersion method;

---Part 7: Determination of Spherical Bursting Strength;

---Part 8: Measurement of Optical Properties. Brightness and Color Measurement D65/10° (Outdoor Daylight Conditions);

---Part 9: Determination of wet-bulb bursting strength;

---Part 10: Determination of tensile strength of perforated wire and calculation of perforation efficiency;

---Part 11: Measurement of Optical Properties - Measurement of Brightness and Color C/2° (Indoor Daylight Conditions);

---Part 12: Determination of Optical Properties - Determination of Opacity - Diffuse Reflection Method;

---Part 13: Determination of dispersibility.

This document is modified to adopt ISO 12625-17:2021 "Toilet paper and its products - Part 17: Determination of dispersibility in water".

This document has undergone significant structural adjustments compared to ISO 12625-17:2021.A comparison of the structural numbering changes between the two documents is provided below.

See Appendix A for the table of contents.

The technical differences between this document and ISO 12625-17:2021, and the reasons therefor, are as follows.

a) The scope has been changed (see Chapter 1) to comply with the drafting rules for national standardization documents in my country;

b) Terms and definitions have been changed (see 3.1) to harmonize with existing standards;

c) The test water was changed to tap water, and the normative reference to ISO 14487 (see 4.1.2) was removed to adapt to Chinese technology.

condition;

d) The bottom view of the rotor (see 4.1.3.4) has been modified to reflect the actual situation;

e) ISO 3310-2 (see 4.1.3.5) has been replaced with the normatively referenced GB/T 6003.2 to adapt to my country's technical conditions;

f) Replace the drying tray with a weighing bottle (see 4.1.3.8) to adapt to my country's technical conditions;

g) ISO 186 (see 4.1.4.1) has been replaced with the normatively referenced GB/T 450 to adapt to my country's technical conditions;

h) ISO 187 has been replaced with the normatively referenced GB/T 10739 (see 4.1.4.2, 4.1.4.3) to adapt to my country's technical conditions;

i) ISO 638-1 (see 4.1.5.1.2) has been replaced with the normatively referenced GB/T 462 to adapt to my country's technical conditions;

j) Instructions for the shower head moving above the screen plate and spraying the product have been added (see 4.1.5.2.9) to improve the operability of the method;

k) ISO 3310-1 (see 4.1.5.2.11) has been replaced with the normatively referenced GB/T 6003.1 to adapt to my country's technical conditions;

l) The formula was modified (see 4.1.6) to suit my country's technological conditions;

m) Method 2 (see 4.2) has been added to conform to the actual situation of dispersibility determination of toilet paper and its products in China;

n) The content that should be included in the test report has been increased (see Chapter 5).

The following editorial changes have been made to this document.

---The standard title has been changed to "Toilet Paper and its Products - Part 13: Determination of Dispersibility" to harmonize with existing standards;

---The URLs for the ISO and IEC terminology databases have been removed;

---Notes in sections 6.5, 6.11, and Chapter 10 of ISO 12625-17:2021 have been removed;

--- Annex B (informative) and Annex D (informative) of ISO 12625-17:2021 have been deleted.

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China National Light Industry Council.

This document is under the jurisdiction of the National Technical Committee on Standardization of Paper Industry (SAC/TC141).

Introduction

GB/T 24328 "Toilet Paper and its Products" will improve the quality level of toilet paper and its products in my country and provide a basis for the production of toilet paper and its products.

It serves as a guide and is planned to consist of 14 parts.

---Part 1: Terminology Guidelines. The purpose is to define the terms and definitions for toilet paper and its products.

---Part 2: Determination of thickness, laminate thickness, apparent laminate density, and bulk. The aim is to specify the measurement at 2.0 kPa.

Methods for determining the thickness and laminate thickness of toilet paper and its products under high-pressure conditions, and calculation of apparent laminate density and bulk.

method.

---Part 3: Determination of tensile strength, elongation at maximum force, and tensile energy absorption. The purpose is to specify the method for constant-rate tensile testing.

A method for determining the tensile strength, elongation at maximum force, and tensile energy absorption of toilet paper and its products using a tensile strength tester.

And the calculation methods for tensile index and tensile energy absorption index.

---Part 4: Determination of wet tensile strength. The purpose is to specify the method for determining the wet tensile strength of toilet paper and its products.

---Part 5: Determination of Quantitative Amount. The purpose is to specify the method for determining the quantitative amount of toilet paper and its products.

---Part 6: Determination of Absorption Time and Capacity using the Basket Immersion Method. The purpose is to specify the method for determining the absorbency of water using the basket immersion method.

Methods for measuring the water absorption time and water absorption capacity of paper and its products.

---Part 7: Determination of Bursting Sphericity. The purpose is to define the resistance of toilet paper and its products to mechanical penetration (bursting sphericity).

The determination method.

---Part 8: Measurement of Optical Properties - Brightness and Color Measurement D65/10° (Outdoor Daylight Conditions). The purpose is to specify...

A method for determining the brightness and color of toilet paper and its products under outdoor sunlight conditions.

---Part 9: Determination of wet-bulb burst strength. The purpose is to specify the resistance of toilet paper and its products to mechanical penetration after wetting (wet-bulb burst strength).

Methods for determining burst strength (bearing capacity).

---Part 10: Determination of Tensile Strength of Perforation Threads and Calculation of Perforation Efficiency. The purpose is to specify the perforation thread requirements for toilet paper and its products.

Methods for determining tensile strength and calculating drilling efficiency.

---Part 11: Measurement of Optical Properties - Luminosity and Color Measurement C/2° (Indoor Daylight Conditions). The purpose is to specify the optical properties to be measured under indoor conditions.

A method for determining the brightness and color of toilet paper and its products under indoor sunlight conditions.

---Part 12: Determination of Optical Properties - Determination of Opacity - Diffuse Reflection Method. The purpose is to specify the method for determining opacity using diffuse reflectance.

Methods for determining the opacity (paper backing) of raw paper and its products.

---Part 13: Determination of dispersibility. The purpose is to determine the dispersibility of toilet paper and its products when subjected to mechanical agitation in water.

Methods for determining dispersibility.

---Part 14: Determination of Surface Tribological Properties. The purpose is to specify the method for determining the surface tribological properties of toilet paper and its products using a contact surface tester.

Methods for assessing surface friction properties.

Toilet paper and its products Part 13: Determination of dispersibility

1 Scope

This document describes two methods for determining the dispersibility of toilet paper and its products when subjected to mechanical agitation in water.

This document applies to the determination of the dispersibility of toilet paper, toilet seat covers, tissues, and other toilet paper products.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 450 Paper and paperboard specimen collection and determination of longitudinal and transverse directions, front and back sides of specimens (GB/T 450-2008, ISO 186.

2002, MOD)

GB/T 462 Determination of moisture content in analytical samples of paper, paperboard and pulp (GB/T 462-2023, ISO 287:2017, ISO 638-1.

2022, ISO 638-2:2022, MOD) GB/T 6003.1 Technical requirements and inspection of test sieves - Part 1: Metal wire woven mesh test sieves (GB/T 6003.1-2022) ISO 3310-1:2016, MOD) GB/T 6003.2 Technical requirements and inspection of test sieves - Part 2: Metal perforated plate test sieves (GB/T 6003.2-2024) ISO 3310-2:2013, IDT GB/T 10739 Standard atmospheric conditions for the treatment and testing of paper, paperboard and pulp specimens (GB/T 10739-2023, ISO 187.

2022, MOD)

3 Terms and Definitions

The following terms and definitions apply to this document.

Disintegration

The degree to which a sample is dispersed into fragments in water under specific conditions.

4 Test Methods

4.1 Method 1