ISO 9727-5:2007

Overview

ISO 9727-5:2007 is an international standard developed by the International Organization for Standardization (ISO) that specifies a test method for determining the maximum extraction force of cylindrical cork stoppers. This standard is essential for evaluating the ease with which cork stoppers can be removed from bottles, ensuring both product quality and consumer convenience. It applies specifically to cylindrical cork stoppers intended to be fully inserted into the bottle neck, commonly called straight cork stoppers.

Key Topics

• Test Methodology
  ISO 9727-5 outlines a precise procedure to measure the force required to extract cork stoppers using a controlled apparatus. The test involves inserting the stopper into a glass tube or bottle, employing a bottling machine for placement, and then pulling the stopper out with an extraction device that measures force with high accuracy.

• Apparatus and Materials
  Key equipment includes a bottling machine with adjustable jaws, glass tubes or bottles with specific internal diameters, a standardized corkscrew, and an extraction device powered by an electric motor with a compression gauge sensor capable of detecting force with a resolution of 10 Newtons.

• Environmental and Sample Conditions
  Tests are conducted under controlled ambient conditions-temperature at 21 °C ± 4 °C and relative humidity around 60% ± 20%. The cork stoppers must be preconditioned to a temperature of 21 °C ± 4 °C and humidity of 6% ± 2% to ensure consistency and reliability in results.

• Measurement and Reporting
  The maximum force during stopper extraction is recorded in newtons, rounded to the nearest 10 N. Test results include the arithmetic mean and standard deviation of the sampled stoppers. The final report references the test method, sample identification, test conditions, and any deviations from the prescribed procedure.

Applications

ISO 9727-5:2007 serves as a vital quality control tool in industries that manufacture and utilize cork stoppers for wine bottles and other bottled beverages. It provides:

• Quality Assurance for Cork Producers
  Enables cork manufacturers to ensure that stoppers meet standardized physical extraction force requirements, balancing sealing efficiency with ease of opening.

• Product Consistency for Bottlers
  Bottling companies can verify that their corked bottles maintain consistent extraction forces, enhancing customer satisfaction and minimizing cork breakage or difficulty during opening.

• Compliance and Benchmarking
  Provides a standardized baseline for product testing, facilitating international trade and compliance with recognized quality specifications.

• Research and Development
  Supports innovation by allowing precise measurement of physical properties on new cork formulations or treatments designed to improve performance.

Related Standards

ISO 9727-5:2007 is part of the broader ISO 9727 series, which covers various physical tests for cylindrical cork stoppers:

• ISO 9727-1: Determination of dimensions
• ISO 9727-2: Mass and apparent density for agglomerated cork stoppers
• ISO 9727-3: Determination of humidity content
• ISO 9727-4: Dimensional recovery after compression
• ISO 9727-6: Determination of liquid tightness
• ISO 9727-7: Determination of dust content

Additionally, ISO 633 provides general cork-related vocabulary, ensuring consistent terminology across cork testing standards.

By adhering to ISO 9727-5:2007, cork producers, bottlers, and quality control laboratories ensure reliable, standardized testing of cork stopper extraction forces. This fosters product excellence, safety, and consumer satisfaction in the wine and bottled beverage industries.