SIST ISO 5267-2:2002 PDF

Name: SIST ISO 5267-2:2002 — Pulps -- Determination of drainability -- Part 2: "Canadian Standard" freeness method
SKU: SIST ISO 5267-2:2002
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Pulps -- Determination of drainability -- Part 2: "Canadian Standard" freeness method

Название (английский):

SIST ISO 5267-2:2002

Pulps -- Determination of drainability -- Part 2: "Canadian Standard" freeness method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 1 мая 2002 г.
ICS:: 85.040
Технический комитет:: VPK - Pulp, paper, board and products

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Описание (английский):

This part of ISO 5267 specifies a method for determination of the drainability of a pulp suspension in water in terms of the "Canadian Standard" freeness in millilitres. In principle, this method is applicable to all kinds of pulp in aqueous suspension. NOTE Treatments which produce a large proportion of fines may induce an anomalous rise in freeness (false freeness), as a rule at values below 100 ml.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 5267-2:2001 defines the “Canadian Standard” freeness method for determining the drainability of pulp suspensions. The standard quantifies freeness as the volume (millilitres) of filtrate collected from the side orifice of a dedicated freeness tester. It is applicable in principle to all types of pulp in aqueous suspension and is widely used in pulp and paper laboratory testing, process control and quality assurance.

Key topics and requirements

Principle: Drainage through a fibre mat formed on a perforated screen is measured as the volume of filtrate from the side orifice.

Apparatus: Requires the Canadian Standard freeness tester (two designs exist: original and modified), calibrated measuring cylinders, an accurate balance, and ISO standard water (ISO 14487). Annex A describes the tester; Annex B covers maintenance; Annex C covers calibration.

Sample preparation:

Stock concentration: 0.30% ± 0.01% (mass), temperature 20.0 °C ± 0.5 °C.
Typical sample transfer: 1 000 ml ± 5 ml of homogeneous suspension.
Avoid air bubbles; recirculate filtrate when thickening to preserve fines.
Note: treatments producing many fines can cause false freeness, typically below 100 ml.

Procedure: Pour the conditioned 1 000 ml sample into the chamber, start flow by opening valves as specified, then measure filtrate volume from the side orifice. Two determinations are required; report the mean. Duplicates differing by more than 2% must be repeated.

Expression and reporting: Mean freeness in ml, test temperature/concentration (if different), funnel type (modified or original), and any unusual conditions. Full reporting items are listed in clause 9.

Practical applications and users

Who uses it:

Laboratory technicians in pulp and paper testing labs
Process control engineers and mill quality teams
Equipment manufacturers and calibration/authorized laboratories
R&D groups assessing mechanical treatment, fibre swelling or refining effects

Typical uses:

Monitoring pulp drainability during refining and stock preparation
Comparing effects of mechanical or chemical treatments on fibre properties
Quality control and specification checks during pulp production Note: ISO 5267-2 results are a laboratory index and may not directly predict drainage on a commercial paper machine.

Related standards

ISO 5267-1 - Schopper‑Riegler method (alternate drainability index)

ISO 14487 - Standard water for physical testing

ISO 4119 - Determination of stock concentration

ISO 5269-1 / ISO 5269-2 - Laboratory sheet forming methods

Keywords: ISO 5267-2, Canadian Standard freeness, pulp drainability, freeness tester, pulp suspension, stock concentration, freeness calibration, pulp testing.

SIST ISO 5267-2:2002 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Practical applications and users

Related standards

Технические детали

ISO 5267-2:2001

Pulps — Determination of drainability — Part 2: "Canadian Standard" freeness method

BS ISO 14487:1997

Pulps. Standard water for physical testing.

ISO 5267-1:1999/Cor 1:2001

Pulps — Determination of drainability — Part 1: Schopper-Riegler method — Technical Corrigendum 1

SIST EN ISO 4119:2000

Pulps - Determination of stock concentration (ISO 4119:1995)

SIST EN ISO 5269-1:2005

Pulps - Preparation of laboratory sheets for physical testing - Part 1: Conventional sheet-former method (ISO…

SIST EN ISO 5269-2:2005

Pulps - Preparation of laboratory sheets for physical testing - Part 2: Rapid-Köthen method (ISO 5269-2:2004)