ISO 15014:2007

Overview

ISO 15014:2007 - Plastics - Extruded sheets of poly(vinylidene fluoride) (PVDF) - Requirements and test methods - specifies requirements and laboratory test methods for solid, flat extruded PVDF sheets (homopolymers and copolymers) without fillers or reinforcements. The standard also covers PVDF sheets supplied in rolled form and applies to nominal thicknesses from 1 mm to 15 mm. It defines acceptance criteria for appearance, dimensions, mechanical and thermal properties, and methods for sampling and testing.

Key topics and requirements

• Material scope: PVDF extrusion materials per ISO 12086‑1; additives such as stabilizers and colorants are allowed but no fillers/reinforcements.
• Appearance: Sheets must be substantially free from bubbles, voids, cracks and visible defects; colorants should be uniformly distributed.
• Dimensional tolerances:
  • Thickness tolerance formula: |Δh| ≤ (0.08 mm + 0.03 × h) where h is nominal thickness.
  • Length/width tolerances are given in tabulated form depending on nominal dimensions (Table 1).
  • Rectangularity is checked by the difference between diagonal lengths.
• Mechanical and thermal properties: The standard specifies required properties (tensile stress at yield, tensile strain at break, modulus of elasticity, Charpy impact strength, melt mass-flow rate) with methods for determining average values.
• MFR testing: Melt mass‑flow rate measured per ISO 1133 at 230 °C and 5 kg load.
• Shrinkage on heating: Limits and test methods follow the principles of ISO 11501. For general use, maximum shrinkage in the extrusion direction is < 3%; separate, thickness-dependent limits apply for thermoforming applications.
• Test specimens & conditioning: Preparation and conditioning of specimens are specified (cut longitudinal and transverse, condition per ISO 291). Tensile and modulus tests follow ISO 527‑2 (notably test speeds: 50 mm/min for tensile stress/strain and 1 mm/min for modulus).
• Impact testing: Charpy notched specimens per ISO 179‑1/2 for applicable thicknesses.

Applications and who uses it

ISO 15014 is used by:

• PVDF sheet manufacturers and extrusion processors for production control and certification.
• Quality control laboratories for acceptance testing and routine inspection.
• Product specifiers, designers and buyers in industries using PVDF sheets (architectural cladding, chemical processing linings, thermoforming parts, electrical insulation and other applications requiring chemical resistance and thermal stability).
• Thermoformers, who rely on the shrinkage and mechanical property limits to design forming processes and tooling.

Related standards

Key referenced standards include:

• ISO 12086‑1 (PVDF material designation)
• ISO 527‑2 (tensile testing)
• ISO 1133 (MFR/MVR)
• ISO 11501 (dimensional change on heating)
• ISO 179‑1/2 (Charpy impact)
• ISO 291 (conditioning)

This standard helps ensure consistent quality, interchangeability and reliable performance of extruded PVDF sheets in manufacturing, specification and testing workflows.