ISO 11093-9:2019
(Main)Paper and board - Testing of cores - Part 9: Determination of flat crush resistance
Paper and board - Testing of cores - Part 9: Determination of flat crush resistance
This part of ISO 11093 specifies a method for the determination of the maximum flat crush resistance of wound paper and board cores. NOTE If the wall thickness of the core is less than 5 mm, the breaking point is not detectable.
Papier et carton — Essais des mandrins — Partie 9: Détermination de la résistance à l'écrasement à plat
General Information
- Status
- Published
- Publication Date
- 04-Mar-2019
- Technical Committee
- ISO/TC 6 - Paper, board and pulps
- Drafting Committee
- ISO/TC 6/WG 7 - Cores for reels of paper
- Current Stage
- 9092 - International Standard to be revised
- Start Date
- 29-Nov-2024
- Completion Date
- 13-Dec-2025
Relations
- Effective Date
- 16-Jun-2018
Overview
ISO 11093-9:2019 defines a standardized method to determine the maximum flat crush resistance of wound paper and board cores. The procedure measures the load acting at right angles to the core axis at the first maximum (or levelling off) of the crushing force. Results are reported in kilonewtons per metre (kN/m) and are intended to provide consistent core strength data for design, quality assurance and conversion processes.
Note: If the wall thickness of the core is less than 5 mm, the breaking point is not detectable and the note in the scope applies.
Key Topics
- Principle: A test piece is compressed between parallel pressure platens with its axis parallel to the platen plane until the first maximum or levelling of the load is exceeded.
- Apparatus:
- Compression testing machine calibrated per ISO 7500-1. Force measurement accuracy: ±1 % of the smallest crushing load measured.
- Flat, rigid, parallel upper and lower platens; platen travel limited to vertical motion only.
- Cutting device (recommended circular saw) producing 90° ± 1° cuts without feathering or deformation.
- Preparation:
- Sampling in accordance with ISO 11093-1.
- One test piece per specimen, taken at least 100 mm from core ends.
- Test piece length: (100 ± 1.5) mm for nominal internal diameter ≤ 300 mm; (300 ± 1.5) mm for > 300 mm.
- Conditioning per ISO 11093-2 and testing in the same standard atmosphere.
- Procedure details:
- Compression rate: constant relative platen rate between 50 mm/min and 65 mm/min.
- Switch-off limit for automatic break detection: 30 N or 3 % from the true value.
- Convert measured force to kN/m to ensure comparability across core diameters.
- Calculation & Reporting:
- Flat crush resistance is calculated from the measured force and expressed in kN/m.
- Test report must reference ISO 11093-9 and include specimen details, sampling/testing dates, individual values and mean (rounded to 1 %), and any departures from the procedure.
Applications
This standard is directly applicable to:
- Packaging designers assessing core performance under lateral load.
- Converters and manufacturers performing incoming inspection and process control.
- Quality assurance teams establishing acceptance criteria for cores used in winding, shipping or storage.
Practical benefits include reproducible strength data for product specification, reduced variability in acceptance testing, and improved compatibility between suppliers and users.
Related Standards
- ISO 11093-1 - Sampling of cores
- ISO 11093-2 - Conditioning of test samples
- ISO 7500-1 - Calibration and verification of static testing machines
For implementation, follow the procedures and reporting requirements in ISO 11093-9:2019 and consult the referenced parts for sampling, conditioning and machine calibration to ensure valid, comparable results.
Frequently Asked Questions
ISO 11093-9:2019 is a standard published by the International Organization for Standardization (ISO). Its full title is "Paper and board - Testing of cores - Part 9: Determination of flat crush resistance". This standard covers: This part of ISO 11093 specifies a method for the determination of the maximum flat crush resistance of wound paper and board cores. NOTE If the wall thickness of the core is less than 5 mm, the breaking point is not detectable.
This part of ISO 11093 specifies a method for the determination of the maximum flat crush resistance of wound paper and board cores. NOTE If the wall thickness of the core is less than 5 mm, the breaking point is not detectable.
ISO 11093-9:2019 is classified under the following ICS (International Classification for Standards) categories: 85.060 - Paper and board. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 11093-9:2019 has the following relationships with other standards: It is inter standard links to ISO 11093-9:2006. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 11093-9:2019 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 11093-9
Third edition
2019-03
Paper and board — Testing of cores —
Part 9:
Determination of flat crush resistance
Papier et carton — Essais des mandrins —
Partie 9: Détermination de la résistance à l'écrasement à plat
Reference number
©
ISO 2019
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2019 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
6 Preparation . 2
6.1 Sampling . 2
6.2 Number of test pieces . 2
6.3 Size of test piece . 2
6.4 Conditioning . 2
7 Procedure. 2
8 Calculation . 3
9 Test report . 3
Foreword
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This document was prepared by Technical Committee ISO/TC 6, Paper, board and pulps.
This third edition cancels and replaces the second edition (ISO 11093-9:2006), of which it constitutes a
minor revision.
The changes compared to the previous edition are as follows:
— A note has been added to the scope, stating that if the wall thic
...
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