01 FILM IMPACT & PENETRATION BASIS
Dart impact vs puncture resistance: choose the test before comparing film offers
“Toughness” is not one test result. A sudden free-falling impact, a slowly driven probe and an instrumented impact-puncture event load film differently and report different outputs. Start with the failure risk, then keep the exact method, specimen and evidence role beside every result.
02 DECISION FRAME
Choose the loading event first; the reported number comes second
ASTM D1709-24 and ISO 7765-1:1988 address free-falling dart impact through a statistical failure-mass result under specified conditions. ASTM F1306-21(2025) addresses slow-rate penetration of flexible barrier films and laminates with a driven probe and reports force, energy and penetration to failure. ISO 7765-2:2025 addresses instrumented impact-puncture behaviour using force-deflection or force-time information. Their public scopes answer different questions; a shared word such as “puncture” does not make the results interchangeable.
- A PE-film RFQ that asks for toughness or puncture resistance without naming the loading event
- A supplier comparison that mixes dart mass, puncture force, penetration energy or different proprietary methods
- A receiving plan that must connect mechanical evidence to the exact grade, construction, lot and roll
- That a higher free-falling dart result proves stronger slow-rate penetration resistance
- That values from different methods, ASTM Test Method A versus B, probes, speeds or specimen thicknesses can be converted automatically
- That flat-film laboratory evidence proves converter runnability, finished-package integrity or distribution performance
03 COMPARISON MAP
Keep three loading events and their evidence outputs separate
Use the failure mode to select the method. Compare results only when the governing specification and responsible technical parties confirm a common basis.
Swipe or scroll horizontally to review every evidence column.
| Decision field | Question the method answers | Basis to keep attached | Do not infer |
|---|---|---|---|
| Free-falling dart impact | Under the selected ASTM D1709 or ISO 7765-1 configuration, what statistical dart mass produces the defined film failure response? | Method and edition, ASTM Test Method A or B or the ISO basis, statistical technique where applicable, dart and support configuration, fall conditions, film construction and fabrication route, thickness, conditioning, specimen map and calculation/reporting basis | Slow-rate probe resistance, instrumented force-deflection behaviour, package drop survival or an equivalent result under another dart configuration |
| Slow-rate penetration | How does an identified flexible barrier film or laminate respond as a driven probe penetrates it at the selected slow test rate? | ASTM F1306 edition, probe and clamp geometry, test rate, temperature, specimen construction and thickness, conditioning, measured force/energy/penetration outputs and failure observation | Free-falling impact response, high-rate impact response, production abuse resistance or finished-package protection |
| Instrumented impact puncture | What force-deflection or force-time response does the identified film show during the selected ISO 7765-2 impact-puncture event? | ISO 7765-2 edition, striker and support configuration, impact velocity, force and deflection instrumentation, film thickness, temperature/RH, specimen preparation and reported response fields | The ISO 7765-1 staircase result, the ASTM D1709 failure-mass result or the ASTM F1306 slow-rate penetration result |
| Specimen and sampling identity | Does the test represent the same commercial-intent film state and lot under review? | Supplier and grade, monoweb or laminate construction, thickness profile, process route, orientation, side, lot/roll, across-web and along-web locations, sample count, conditioning, age and damage history | Commercial-roll uniformity from an unlocated specimen or grade-wide performance from one laboratory sample |
| Document and acceptance role | Is the entered value a buyer requirement, supplier limit, typical value, sample result, lot COA or independent report? | Controlled document and revision, original unit and output, method basis, sampling/uncertainty rule, comparator, retest route and responsible disposition owner | That a producer example, TDS typical value or one COA releases a shipment or approves future lots |
| Use-stage validation | Which conversion, filling, handling or package risk remains after the flat-film measurement? | Representative converter trial, converted structure, finished-pack test, distribution scenario, failure observations and pre-agreed decision owner | Leak integrity, shelf life, line speed, drop performance or packed-product protection from one flat-film result |
04 SELECTION SEQUENCE
Move from a broad comparison to an approvable decision.
Name the failure event
State whether the concern is sudden impact, slow contact with a sharp or projecting product, detailed dynamic deformation, or a finished-package event. Do not begin with a familiar test acronym.
Normalize method and specimen
Keep the current method edition, configuration, velocity or rate, geometry, environment, thickness, construction, orientation, sampling map and output definition together.
Write a buyer-owned decision rule
Separate typical data, supplier limits and lot results, then define sampling, retest, uncertainty treatment and disposition without asking the guide or comparator to approve a lot.
05 RFQ INPUTS
Film dart-impact and puncture-resistance RFQ checklist
Choose only the method that answers the documented failure risk, then request the same evidence basis from every candidate.
Open the RFQ brief builder ↗- 01
Packed product, package format, complete structure and the impact, contact or penetration failure being controlled
- 02
Exact film or laminate grade/construction, thickness, fabrication route, orientation, side, specimen stage and current reference material
- 03
Selected official or buyer method and edition, including which document takes precedence when supplier and buyer methods differ
- 04
For free-falling dart evidence, ASTM Test Method A or B or the ISO staircase basis, the applicable statistical technique, dart/support configuration and fall conditions
- 05
For slow-rate penetration, the probe/clamp geometry, test rate, temperature and required force, energy and/or penetration output
- 06
For instrumented impact puncture, the striker/support configuration, impact velocity, instrumentation and required force-deflection or force-time output
- 07
Original result name and unit; do not convert a failure mass, peak force, penetration energy or deflection into another method's result
- 08
Specimen preparation, conditioning, temperature/RH, age, surface history and any relevant damage or conversion stage
- 09
Lot/roll identity, across-web and along-web sample map, specimen count, exclusions and result-summary rule
- 10
Buyer requirement, supplier specification, TDS typical value, sample report, lot COA and independent report kept in separate evidence roles
- 11
Comparator or range, rounding/uncertainty treatment, retest route, nonconformance disposition and responsible acceptance owner
- 12
Representative converter, finished-package and distribution checks required before application approval
06 EVIDENCE BOUNDARY
Public method scopes frame the buying question; they do not supply a value or approval
The official ASTM and ISO pages summarize method scope and significance; they do not replace the current licensed procedures. ASTM D1709-24 says Test Method A and Test Method B are not directly comparable, while its staircase and alternative statistical techniques give equivalent results inside the standard's stated framework. It also identifies differing impact conditions, film fabrication and sample quality as influential and warns against simple thickness normalization. ISO 7765-1:1988, confirmed in 2025, covers the free-falling dart staircase decision for film and sheeting below 1 mm. ASTM F1306-21(2025) characterizes slow-rate driven-probe penetration of flexible barrier films and laminates. ISO 7765-2:2025 covers instrumented impact puncture for film up to 1 mm when detailed force response is required, and also when only a small number of specimens are available and the ISO 7765-1 staircase method cannot be applied. ExxonMobil technical material lists dart-drop impact and needle-puncture resistance as separate test items and states that representative data are not the actual product shipped; it is an industry reporting example, not a LayerSource grade, method, facility or capability. The buyer, supplier, laboratory and converter must select the applicable current method and own the sampling, comparison, retest and release decision.
07 BUYER QUESTIONS
Resolve the assumptions that make quotes diverge.
01Can a dart-impact result be converted into a slow-rate puncture result?+
No automatic conversion is supported. The loading rate, geometry, endpoint and reported output differ. Keep each result on its original method and resolve any project-specific correlation with the responsible laboratory and buyer.
02Should a buyer request ASTM D1709 or ASTM F1306?+
Choose from the documented failure event. D1709 addresses a specified free-falling impact and statistical film-failure response; F1306 addresses slow driven-probe penetration of an identified flexible barrier film or laminate. Some projects may need both, but they remain separate acceptance rows.
03When is ISO 7765-2 different from the staircase dart method?+
ISO 7765-2 records an instrumented impact-puncture response such as force versus deflection or time. ISO 7765-1 uses a free-falling dart staircase approach. The results answer different questions and retain their own method basis.
04Can impact or puncture evidence be normalized by film thickness?+
Do not apply a blanket normalization. ASTM D1709's public significance statement says impact resistance has no simple relationship with thickness. Compare the agreed construction and thickness under the same applicable method.
05Can a producer data-sheet or case-study value release an incoming lot?+
No. Keep producer typical or representative data attached to its named material and method. Lot release requires the buyer-controlled specification, traceable lot evidence, agreed sampling and a responsible acceptance decision.
06Does a flat-film puncture result prove finished-package integrity?+
No. Conversion, seals, folds, product contact, filling, storage and distribution can change the failure mode. Qualify the converted structure and finished pack against the intended use-stage risk.