Gloves, as the core equipment for hand protection, are widely used in various fields such as medical, chemical, food processing, laboratory operations, etc. Their puncture protection performance is directly related to the safety of the user's hands, avoiding injury or contamination caused by sharp object puncture. The puncture test, as a key indicator for evaluating the protective ability of gloves, and the precise application of relevant standards and testing techniques, are the core links to ensure the quality and safety of glove products. This article will systematically review the core standards, testing principles, operating procedures, and application scenarios of glove puncture tests, providing technical references for industry production, quality inspection, and users.
The glove puncture test standards have formed two major systems, international and domestic. Different standards have their own emphasis on the scope of application, testing methods, and indicator requirements, and the corresponding standards should be selected and implemented according to the glove type and usage scenario.
ASTM D6978-15The American Society for Testing and Materials has developed a puncture resistance test for disposable gloves (such as nitrile gloves, latex gloves, PVC gloves), which specifies the testing equipment, puncture probe types, test speed, and result calculation methods. It is one of the most widely used standards in the global medical and industrial fields.
ISO 13997:2019Published by the International Organization for Standardization, covering various types of protective gloves (including disposable and reusable gloves), the testing principle is similar to ASTM D6978-15, but there are differences in probe size and sample pretreatment conditions, emphasizing global universality and compatibility.
EN 388:2016The EU standard for protective gloves considers puncture performance as an important indicator for evaluating the protection level of gloves (alongside wear resistance, cut resistance, and tear resistance). Specific puncture probes and testing procedures are used, and the test results directly correspond to the protection level identification of gloves (such as levels 1-4), which is the core basis for market access in the EU.
GB/T 24786-2021Disposable PVC Gloves "is suitable for puncture testing of disposable PVC gloves. Referring to the technical requirements of ASTM D6978-15, the sample size and testing environment regulations have been optimized based on domestic production practices.
GB/T 10213-2021Disposable Rubber Inspection Gloves "specifies the equipment parameters, testing steps, and qualification indicators for puncture testing of rubber materials such as latex and nitrile, and is the main basis for glove procurement and quality inspection in the domestic medical industry.
GB 24541-2020Hand protection machinery hazard protective gloves "are suitable for industrial scenarios to prevent mechanical punctures. They use testing methods compatible with EN 388:2016, and the protection level classification is in line with international standards, making them easy for export-oriented enterprises to apply.
The puncture test simulates the puncture scenario of gloves encountering sharp objects (such as needles, metal fragments, glass shards, etc.) in actual use. A standardized probe is used to vertically puncture the glove sample at a constant speed, recording the maximum force required during the puncture process (i.e. puncture resistance), or determining whether the sample has been penetrated by puncture, in order to evaluate the glove's puncture resistance. The higher the puncture resistance value, the stronger the glove's ability to resist sharp object penetration; For grading standards (such as EN 388:2016), different protection levels are corresponding to the test force values.
test instrumentA specialized puncture testing machine (such as CS-6089-TP glove puncture resistance testing machine) is required, with a force measurement accuracy of ≥ ± 1%, a speed adjustment range of 0.5-500mm/min, and a displacement measurement accuracy of ≥ ± 0.01mm, to ensure the accuracy and repeatability of the test data.
Puncture probeDifferent standards have clear regulations on the material, shape, and size of probes, and common types include:
φ5mm， Front conical shape, with a taper angle of 12 ° and a top radius of 0.8mm;
φ4.5mm， The front section is conical, with a taper of 30 ° and a top radius of 0.5mm. The material is steel (Rockwell hardness 60HRC);
sample preparationAt least 5 samples should be taken from each of the three key parts of the glove, namely the palm, fingertips, and back of the hand. The sample size is usually 50mm × 50mm (some standards require 60mm × 60mm), and it is necessary to ensure that the sample is not damaged, wrinkled, or contaminated, and the thickness is uniform (thickness deviation ≤ ± 0.02mm).
test environmentThe standard environmental conditions are a temperature of 23 ℃± 2 ℃ and a relative humidity of 50% ± 5%. The sample needs to be pre treated in this environment for at least 24 hours to avoid temperature and humidity changes affecting the glove material properties and causing distortion of test results.
Cut samples from the designated parts of the glove to be tested, with at least 5 parallel samples for each part, labeled with the sample number and sampling location.
Place the sample in a standard environmental chamber for pretreatment for 24 hours, avoiding direct sunlight, dust pollution, and mechanical damage during this period.
Measure the thickness of each sample (at 5 points in the center and corners of the sample, take the average), and record the thickness data as an auxiliary analysis basis.
Install the puncture probe corresponding to the standard requirements, check whether the needle is intact (without wear, deformation, burrs), and ensure that the probe is perpendicular to the sample clamping device.
Calibrate the force sensor and displacement sensor of the testing machine, and set the testing speed (common standard speed is 100mm/min, and some industrial glove standards are 50mm/min).
Adjust the sample clamping device to ensure that the clamping is firm and does not damage the sample, and the surface of the sample remains flat without tension or wrinkles.
Fix the preprocessed sample on the clamping device, aligning the probe with the center position of the sample.
Start the testing machine, move the probe towards the sample at the set speed and puncture it, and record the force displacement curve in real-time during the puncture process.
When the probe penetrates the sample completely (with a significant decrease in force), stop the test and record the maximum puncture force value (unit: N).
Repeat the above steps to complete the testing of all samples, eliminate abnormal data (such as sudden changes in force values caused by sample defects), and retain valid data.
Calculate the average puncture force value of each sampling site sample (taking the arithmetic mean of the valid data), rounded to two decimal places.
Judging qualification according to corresponding standards: ① Quantitative standards (such as ASTM D6978-15): The average puncture force value should be ≥ the lower limit specified in the standard (such as disposable medical gloves usually require ≥ 1.5N); ② Classification criteria (such as EN 388:2016): Corresponding protection level based on average force value (Level 1: ≥ 1.2N, Level 2: ≥ 2.5N, Level 3: ≥ 5.0N, Level 4: ≥ 10.0N).
Provide a test report clearly indicating the testing standards, equipment model, environmental conditions, sampling location, thickness data, average puncture force value, and qualification assessment results.
Improper sample preparation: Deviation in sampling position (such as failure to avoid glove seams and thickened areas), uneven sample thickness, and inadequate pre-treatment environment can lead to excessive fluctuations in force values.
Equipment issues: probe wear and deformation, loose clamping device, and uncalibrated force sensor can affect the accuracy of test data.
Operational errors: The probe is not aligned with the center of the sample, the testing speed is set incorrectly, and the sample slides during the puncture process, which can lead to low puncture force values or data distortion.
Regular maintenance and testing equipment: check the status of probes weekly, calibrate force and displacement sensors monthly, and conduct equipment calibration annually to ensure stable equipment performance.
Standardized sample handling: strictly follow the standard requirements for sampling, avoid cutting samples at the edges or damaged areas of gloves, and maintain stable environmental parameters during the pre-treatment process.
Adequate number of parallel samples: At least 5 parallel samples should be tested for each part, and after removing outliers, it is necessary to ensure that there are no less than 3 valid data to ensure the representativeness of the results.
Based on practical scenario analysis, different usage scenarios have different requirements for puncture performance (such as medical gloves needing to resist needle puncture, industrial gloves needing to resist metal fragment puncture), and corresponding testing standards and probe types need to be selected.
Quality control of production enterprises: During the glove production process, product consistency is monitored through puncture testing, and production processes (such as material formula and thickness control) are adjusted in a timely manner to ensure that the products meet standard requirements.
Third party testing agency certification: As a core testing item for glove product market access, CE certification, and FDA registration, it provides a basis for product compliance.
End user procurement acceptance: When purchasing gloves, enterprises in the medical, chemical, food and other industries verify the puncture test report to determine whether the product meets the protection requirements of the usage scenario.
Ensuring user safety: Through standardized testing, gloves with puncture protection performance that meets standards are selected to reduce the risk of work-related injuries and infections caused by sharp object punctures.
Standardize market order: Unified testing standards provide a unified basis for enterprise production, inspection by testing institutions, and supervision by regulatory departments, to prevent inferior products from entering the market.
Promote technological upgrading: update and improve standards (such as optimizing testing methods for new material gloves), guide enterprises to develop more protective glove products, and promote high-quality development of the industry.
The glove puncture test standard is the core technical basis for ensuring the protective performance of gloves, and its standardized implementation is directly related to the safety of terminal use. Whether it is production enterprises, testing institutions or end users, they need to accurately grasp the technical requirements of relevant standards, standardize testing processes, and ensure the accuracy and reliability of test data. With the continuous expansion of glove materials and application scenarios, the puncture test standards will also continue to be optimized, further improving the protection accuracy and industry adaptability of glove products, and providing stronger technical support for hand safety protection in various fields.