ISO 5264-2-2011 PDF

Full title and description

St ISO 5264-2-2011 — Pulps — Laboratory beating — Part 2: PFI mill method. This international standard describes the laboratory procedure, equipment and basic requirements for beating pulp using a PFI mill, including sampling, preparation and the beating operation for chemical and semi-chemical pulps.

Abstract

ISO 5264-2:2011 specifies a reproducible laboratory method for beating pulp with a PFI mill to modify fibre properties prior to sheetmaking and testing. The standard is limited to sampling, disintegration/preparation of the test portion, the PFI mill beating procedure and related equipment/conditions; it is intended primarily for chemical and semi-chemical pulps and may be unsuitable for some extremely long‑fibred pulps.

General information

• Status: Published (confirmed current in ISO systematic reviews; third edition in force).
• Publication date: 2011-02 (third edition published February 2011).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 85.040 (Pulp and paper).
• Edition / version: 3rd edition (2011).
• Number of pages: 11 (official ISO document page count).

Scope

Defines a laboratory beating method using the PFI mill: preparation of the test portion, disintegration (reference to laboratory disintegrator procedures where required), thickening and dilution to a specified stock consistency, the PFI mill beating procedure (including loading and count of roll revolutions), and reporting of conditions and results. The method is principally applicable to chemical and semi‑chemical pulps; in practice it may not give satisfactory results for pulps with extremely long fibres.

Key topics and requirements

• Test portion and sample preparation: typical test portion around 30.0 ± 0.5 g oven‑dry pulp; wet or machine‑dried samples are soaked and disintegrated to ensure fibre separation.
• Disintegration: use a laboratory disintegrator (ISO 5263‑1); typical propeller revolutions specified — 30 000 revolutions for pulps with initial dry matter ≥ 20 %; 10 000 revolutions for lower concentrations.
• Stock concentration and thickening: thickened and then diluted to a 10 % stock (commonly prepared by bringing ~300 g of thickened pulp to a total mass/volume of 2 000 ± 25 ml).
• PFI mill specification and beating force: PFI mill roll and housing geometry and rotational speeds are specified; nominal beating force per unit bar length typically (3.33 ± 0.10) N/mm (option for a lower setting (1.77 ± 0.10) N/mm where required for certain pulps).
• Beating procedure and record keeping: even distribution of pulp, controlled application of load, counting of roll revolutions, rinsing/re‑disintegration when required, and detailed reporting of conditions (temperatures, disintegration revolutions, applied force, number of PFI revolutions, materials of beating elements and any deviations).
• Quality control and maintenance: recommendations for reference pulps for mill stability checks and guidance on mill maintenance and calibration.

Typical use and users

Used in pulp and paper laboratories for development, research, and quality control where controlled laboratory beating is required before sheet formation and physical testing. Typical users include pulp/paper R&D scientists, QA/QC analysts, paper machine trial teams, laboratory technicians, instrument and equipment manufacturers, and standards bodies referencing laboratory beating as part of product testing and specification.

Related standards

Closely related documents include ISO 5263‑1 (laboratory wet disintegration — preparation of test portions), ISO 5264‑1 (Valley beater method — another laboratory beating method), and ISO 5267 series (determination of drainability). National and regional identical/adopted versions and equivalents (EN, BS, NEN, JIS, AS/NZS etc.) align with ISO 5264‑2:2011.

Keywords

PFI mill, laboratory beating, pulp, disintegration, stock preparation, beating force, Schopper‑Riegler (related drainability tests), ISO 5264‑2, pulp testing, QC, handsheet preparation.

FAQ

Q: What is this standard?

A: ISO 5264‑2:2011 is the international standard that specifies the PFI mill laboratory method for beating pulp — the controlled mechanical treatment used to modify fibre properties prior to sheetmaking and testing.

Q: What does it cover?

A: It covers sampling and preparation of the test portion, disintegration requirements (reference to ISO 5263‑1), thickening and dilution to a 10 % stock, PFI mill operating conditions and geometry, specified beating forces (nominal and optional lower setting), the beating procedure, reporting requirements and basic quality‑control guidance.

Q: Who typically uses it?

A: Laboratory technicians and engineers in pulp and paper R&D and quality control, instrument and PFI‑mill manufacturers, standards organizations and laboratories preparing handsheets or performing property testing that require a defined pre‑treatment (beating) of the pulp.

Q: Is it current or superseded?

A: ISO 5264‑2:2011 is the third edition published in 2011 and, according to ISO review records, was confirmed in subsequent systematic reviews (the ISO record identifies it as the published/confirmed edition). Users should check with their national body or ISO for any later amendments or revisions before relying on the document for regulatory or contractual work.

Q: Is it part of a series?

A: Yes — ISO 5264 (laboratory beating) comprises multiple parts (for example, ISO 5264‑1 covers the Valley beater method) and is linked to other pulp testing standards such as the ISO 5263 series (disintegration) and ISO 5267 series (drainability). Many regional/adopted versions (EN, BS, JIS, AS/NZS) exist that are identical or aligned to ISO 5264‑2:2011.

Q: What are the key keywords?

A: PFI mill, laboratory beating, pulp conditioning, disintegration, stock consistency, beating force, laboratory method, pulp testing, ISO 5264‑2.