EN ISO 5263-2:2004 PDF
Pulps - Laboratory wet disintegration - Part 2: Disintegration of mechanical pulps at 20 degrees C (ISO 5263-2:2004)
Pulps - Laboratory wet disintegration - Part 2: Disintegration of mechanical pulps at 20 degrees C (ISO 5263-2:2004)
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 8
- Дата публикации:
- 1 сентября 2004 г.
- Издание:
- CEN EN 5263 edition 2 version 1
- ICS:
- 85.040
ISO 5263-2:2004 specifies an apparatus and the procedures for the laboratory-wet disintegration of mechanical pulps that do not exhibit latency or pulps where latency has already been removed. This apparatus and procedure are required for preparation of the test portion in a number of other International Standards dealing with pulps. In principle, this method is applicable to all kind of mechanical pulps (i.e. mechanical, semi-chemical and chemo-mechanical pulps) that do not exhibit latency, including recovered fibres from mechanical pulps. It is not suitable for mechanical pulps exhibiting latency for which the disintegration procedure described in ISO 5263-3 shall be used. The procedure specified by ISO 5263-2:2004 should also be used to disintegrate all mechanical pulps to be measured for brightness.
Abstract
Overview
EN ISO 5263-2:2004 - Pulps: Laboratory wet disintegration, Part 2 specifies the apparatus and procedures for wet disintegration of mechanical pulps at 20 °C. It is a laboratory method used to separate interlaced fibres without significantly altering fibre structure and is intended for mechanical, semi‑chemical and chemo‑mechanical pulps that do not exhibit latency (or where latency has been removed). The procedure is also required when preparing samples for a number of other pulp test standards and for brightness measurements.
Key Topics and Technical Requirements
- Scope & applicability: Mechanical pulps and recovered fibres without latency; not suitable for pulps exhibiting latency (see ISO 5263-3 for hot disintegration).
- Standard disintegrator: Detailed construction and dimensions are given in Annex A (cylindrical container, spiral baffles, three‑bladed propeller). Annex B describes checking and maintenance requirements.
- Test portion:
- Mass: (50 ± 5) g oven‑dry pulp per disintegration.
- For sheet samples: avoid cut edges and do not cut sheets before testing.
- Water and temperature:
- Use standard water (ISO 14487) or the water quality specified for the downstream test.
- Disintegration temperature: (20 ± 5) °C (climatic exceptions permitted if reported).
- Soaking times (recommended):
- Dry matter < 20 %: 0 min
- 20–60 %: 30 min
-
60 %: 4 h (max soaking 24 h)
- Disintegration action:
- Add water to (2 500 ± 25) ml, set counter to zero and run for the specified number of revolutions. Recommended revolutions:
- Dry matter
- Add water to (2 500 ± 25) ml, set counter to zero and run for the specified number of revolutions. Recommended revolutions:
Технические детали
- Технический комитет
- CEN/TC 172 - Pulp, paper and board
- SKU
- EN ISO 5263-2:2004
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