ISO 16065-2:2014

Name: ISO 16065-2:2014 — Pulps — Determination of fibre length by automated optical analysis — Part 2: Unpolarized light method
SKU: ISO 16065-2:2014
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Pulps — Determination of fibre length by automated optical analysis — Part 2: Unpolarized light method

Название (английский):

ISO 16065-2:2014

Pulps — Determination of fibre length by automated optical analysis — Part 2: Unpolarized light method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 9
Дата публикации:: 14 января 2014 г.
Издание:: ISO IS 16065 edition 2 version 1
ICS:: 85.040

Тип поставки:

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Язык документа:

ruen

Срок поставки:1 рабочий день

Цена:25 €

Описание (английский):

ISO 16065-2:2014 specifies a method for determining fibre length by automated optical analysis using unpolarized light. The method is applicable to all kinds of pulp. However, fibrous particles shorter than 0,2 mm are not regarded as fibres for the purposes of ISO 16065-2:2014 and, therefore, are not included in the results.

Abstract

Overview - ISO 16065-2:2014 (Unpolarized light method)

Key topics and technical requirements

Measurement principle: fibres in suspension pass through a measuring cell; an unpolarized light source produces a high‑contrast image and a detector (e.g., CCD camera) determines individual fibre lengths.
Apparatus specs:
- Resolution: equal to or better than 100 µm over the 0–7 mm range.
- Accuracy: at least 0.01 mm.
- Flow must orient fibres into a focal depth ≤ 0.5 mm and be resistant to interference from air bubbles or non‑fibrous particles > 0.2 mm.
Sample preparation:
- Follow appropriate disintegration (ISO 5263 series) or test never‑dried pulps where possible to avoid generating fines.
- Recommended test mass fractions: 0.010–0.025% for softwood, 0.004–0.010% for hardwood; mixed stocks treated as hardwood.
- Dilution water: free of non‑fibrous material and bubbles > 5 µm, evaporation residue < 50 mg/l.
Measurement procedure:
- Continuously agitate suspension and take at least a 50‑ml test portion.
- Measure until the mean length stabilizes to a variance of 0.01 mm; if continuous reporting is not available, measure a minimum of 5 000 fibres.
Verification and quality control:
- Use manufacturer-supplied rayon verification fibres (suggested ~0.5 mm, 3.0 mm, 7.0 mm; accuracy 0.01 mm) for calibration checks (weekly).
- Perform monthly performance checks with a reference pulp (tolerance for length‑weighted fibre length of chemical pulps: ±1.5%).
Calculations: the standard prescribes counting fibres by length classes and computing number, length‑weighted and mass‑weighted mean lengths and distributions.

Applications - who uses ISO 16065-2

Pulp and paper manufacturers assessing raw pulp quality and process control
Quality laboratories measuring fibre-length distributions for product specification
Instrument manufacturers validating and calibrating fibre‑length analysers
Research labs studying fibre properties, refining effects, and end‑use performance

Related standards

ISO 16065-1 (Polarized light method)
ISO 638 (dry matter content)
ISO 4119 (stock concentration)
ISO 5263-1/2/3 (lab wet disintegration)
ISO 7213 (sampling)
ISO/TR 24498 (precision guidance referenced in the second edition)

Using ISO 16065-2 helps standardize automated fibre-length measurement, improve repeatability across labs, and support process optimization and product specification in the pulp and paper industry.

Технические детали

Технический комитет: ISO/TC 6 - Paper, board and pulps
SKU: ISO 16065-2:2014

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