Adhesives - Determination of the open assembly time for thermoplastic wood adhesives for non-structural applications

This European Standard defines the test method for the determination of the maximum open time for thermoplastic wood adhesives for non-structural applications by tensile shear strength. It is carried out on standardized test pieces glued with increasing open times.

Klebstoffe - Bestimmung der offenen Wartezeit bei thermoplastischen Holzklebstoffen für nicht tragende Anwendungen

Diese Europäische Norm legt das Prüfverfahren zur Bestimmung der maximalen offenen Wartezeit bei thermoplastischen Holzklebstoffen für nicht tragende Anwendungen durch eine Zug-Scherprüfung fest. Die Prüfung wird an genormten Prüfkörpern ausgeführt, die mit zunehmenden offenen Wartezeiten verklebt wurden.

Adhésifs - Détermination du temps d'assemblage ouvert des adhésifs thermoplastiques pour bois pour applications non structurales

La présente Norme européenne spécifie la méthode d'essai qui permet de déterminer le temps ouvert maximal des adhésifs thermoplastiques pour bois destinés à être utilisés dans le cadre d'applications non structurales, à partir de la résistance au cisaillement en traction. L'essai est réalisé sur des éprouvettes normalisées encollées avec des temps ouverts croissants.

Lepila - Ugotavljanje odprtega časa plastomernih lepil za les za nekonstrukcijsko uporabo

Ta evropski standard določa preskusno metodo za ugotavljanje odprtega časa montaže za plastomerna lepila za les za nekonstrukcijsko uporabo z ugotavljanjem natezne strižne trdnosti. Izvede se na standardiziranih preskusnih kosih, ki so lepljeni z naraščajočimi odprtimi časi.

General Information

Status
Published
Public Enquiry End Date
29-Sep-2014
Publication Date
17-Nov-2014
ICS
83.180 - Adhesives
Technical Committee
IPMA - Polimer materials and products
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
13-Nov-2014
Due Date
18-Jan-2015
Completion Date
18-Nov-2014
Ref Project
EN 16556:2014 - Determination of the maximum open time for thermoplastic wood adhesives for non-structural applications

Overview

EN 16556:2014 specifies a laboratory test method to determine the maximum open time for thermoplastic wood adhesives used in non‑structural applications. The standard evaluates how long an adhesive can remain exposed (open time) before assembly while still delivering acceptable tensile shear strength on standardized lap‑joint test pieces. Testing is performed on conditioned beech panels glued with increasing open times and loaded in a tensile testing machine until rupture.

Key topics and technical requirements

  • Scope: Maximum open time determination for thermoplastic wood adhesives for non‑structural applications using tensile shear strength.
  • Test principle: Symmetrical single lap joint between wooden adherends, pulled parallel to the grain until failure.
  • Materials & conditioning: Unsteamed, straight‑grained beech (density 700 ± 50 kg/m³ at 12 ± 1 % moisture); panels and adhesives conditioned in standard atmosphere ((23 ± 2) °C, 50 ± 5 % RH or (20 ± 2) °C, 65 ± 5 % RH).
  • Adhesive application: Apply on one adherend only; spread (150 ± 10) g/m²; start timing immediately after application; closed assembly time (180 ± 30) s; pressing pressure (0.8 ± 0.1) N/mm²; minimum pressing time 2 h.
  • Specimen geometry: Test strip width b = (20.0 ± 0.2) mm; overlap l2 = (10.0 ± 0.2) mm; panel thickness s = (5.0 ± 0.1) mm; bondline thickness a = (1.0 ± 0.1) mm; saw cut ~2.5 mm.
  • Mechanical testing: Constant‑rate‑of‑traverse machine at 50 mm/min; machine capacity ≥ 5 kN ± 2 %; clamp up to 40–50 mm ends; record Fmax.
  • Results: Shear strength τ = Fmax / (l2 × b) (l2 × b = 200 mm²). The adhesive strength for each open time is the arithmetic mean of valid test pieces. Valid tests exclude specimens with wood failure at or below specified threshold (see standard).

Applications and users

EN 16556:2014 is used to:

  • Define product performance limits (maximum open time) during adhesive development and quality control.
  • Support technical data sheets and application guidance for manufacturers of thermoplastic wood adhesives.
  • Guide independent test laboratories, R&D teams, wood product manufacturers (furniture, interior joinery), and certification bodies evaluating assembly window and process robustness.
  • Help production engineers optimize assembly workflow and pressing schedules to ensure reliable bond strength.

Related standards

  • EN 923 - Adhesives: Terms and definitions
  • EN 1067 - Examination and preparation of samples for testing
  • EN ISO 15605 - Adhesives: Sampling
  • ISO 5893 - Tensile test equipment specification
  • EN 205 - Tensile shear strength of lap joints (screening specimens)

Keywords: EN 16556:2014, maximum open time, thermoplastic wood adhesives, tensile shear strength, adhesive testing, lap joint, bond strength, non‑structural applications.

Frequently Asked Questions

SIST EN 16556:2015 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Adhesives - Determination of the open assembly time for thermoplastic wood adhesives for non-structural applications". This standard covers: This European Standard defines the test method for the determination of the maximum open time for thermoplastic wood adhesives for non-structural applications by tensile shear strength. It is carried out on standardized test pieces glued with increasing open times.

This European Standard defines the test method for the determination of the maximum open time for thermoplastic wood adhesives for non-structural applications by tensile shear strength. It is carried out on standardized test pieces glued with increasing open times.

SIST EN 16556:2015 is classified under the following ICS (International Classification for Standards) categories: 83.180 - Adhesives. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 16556:2015 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.QHNRQVWUXNFLMVNRXSRUDERKlebstoffe - Bestimmung der offenen Wartezeit bei thermoplastischen Holzklebstoffen für nicht tragende AnwendungenAdhésifs - Détermination du temps d'assemblage ouvert des adhésifs thermoplastiques pour bois pour applications non structuralesAdhesives - Determination of the open assembly time for thermoplastic wood adhesives for non-structural applications83.180LepilaAdhesivesICS:Ta slovenski standard je istoveten z:EN 16556:2014SIST EN 16556:2015en,fr,de01-januar-2015SIST EN 16556:2015SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16556
November 2014 ICS 83.180 English Version
Determination of the maximum open time for thermoplastic wood adhesives for non-structural applications
Détermination du temps ouvert maximal des adhésifs thermoplastiques pour bois pour applications non structurales
Bestimmung der maximalen offenen Wartezeit bei thermoplastischen Holzklebstoffen für nicht tragende Anwendungen This European Standard was approved by CEN on 20 September 2014.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16556:2014 ESIST EN 16556:2015
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