Overview
EN ISO 9311-1:2005 - "Adhesives for thermoplastic piping systems - Part 1: Determination of film properties" (CEN adoption) defines laboratory procedures to assess the spreadability and basic film properties of solvent-containing adhesives used with thermoplastic piping systems. The standard specifies three test methods (one for non‑thixotropic adhesives, two for thixotropic adhesives). Results from the three methods are not directly comparable. The document supports quality control, product development and specification of adhesives for plastics piping.
Key topics and technical requirements
- Scope: Three test procedures for solvent-containing adhesives; differentiation between non‑thixotropic and thixotropic adhesives.
- Conditioning: Adhesive, applicator and test plate conditioned at (23 ± 2) °C and (50 ± 5) % RH for at least 6 h.
- Application speed and length: Apply adhesive at approximately 20 mm/s over a minimum length of 200 mm.
- Apparatus
- Adhesive applicator 1: Dual-edge design - one edge for non‑thixotropic (Method A), the other for thixotropic (Method B).
- Adhesive applicator 2: Used for thixotropic adhesives (Method C), produces a 100 mm wide film of (2 ± 0.1) mm thickness.
- Test plates: Glass plates (≥150 × 250 mm) or untreated plastic plates relevant to the adhesive substrate (e.g., PVC‑U).
- Methods
- Method A: For non‑thixotropic adhesives - use applicator 1 (side A).
- Method B: For thixotropic adhesives - use applicator 1 (side B).
- Method C: For thixotropic adhesives - use applicator 2 on a plastic plate; hold vertically for 3 min, then measure flow.
- Results & reporting
- Methods A & B: Compare films against reference patterns and assign scores for each of three test plates.
- Method C: Measure flow at 50, 100 and 150 mm, compute mean M (mm) and spreadability S = 100 − M (mm).
- Inspect film continuity and note lumps or foreign matter.
- Test report must include method, batch identification, scores/mean, film description and test date (see clauses a–g).
Applications and who uses this standard
- Quality control labs and adhesive manufacturers to verify spreadability and film quality.
- Product development and R&D teams comparing adhesive formulations (thixotropic behaviour).
- Test laboratories issuing compliance data for specifications of thermoplastic piping systems.
- Specifiers, procurement and installation engineers selecting adhesives for PVC‑U and other thermoplastic pipe systems.
Related standards
- EN ISO 9311-2: Determination of shear strength (adhesives for thermoplastic piping).
- EN ISO 9311-3: Test for resistance to internal pressure.
- EN 923:1998 - Adhesives terms and definitions.
Keywords: EN ISO 9311-1:2005, ISO 9311-1:2005, adhesives for thermoplastic piping systems, spreadability, film properties, thixotropic adhesives, adhesive test methods, PVC‑U adhesives.
