Most Common Laminating Defects and Origin | Luc Moeyersons

Date: 15 November 2022
Copyright:
  • Luc Moeyersons
  • https://lami-solutions.medium.com/most-common-laminating-defects-origin-2e95a3444aeb

Date: 15 November 2022

This document provides an overview of the causes of sunburst delamination in laminated glass.

Architectural Glass Laminating Guide - Part 7

By Luc Moeyersons

Most Common Laminating Defects & Origin

Most Common Laminating Defects & Origin

Bubble/delamination formation

Bubble/delamination formation

Some air will be dissolved in the PVB layer.

When large in amount or when laminated glass (PVB) is under warm conditions (softening of PVB) these “micro bubbles” will grow and coalesce into “worm” or “finger”-like delamination and ultimately into “sunburst” delamination.

A spherical shape bubble can “support’ a high internal pressure (needed to form and come out of solution), but wants to relief that pressure. Due to the sunburst shape (very large contact area between volatile and PVB) this pressure is released significantly. Ambient temperature (softness of PVB) will influence the speed of this phenomenon. Often small glass chips are found to be a nucleus for the air bubble to grow around.

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

Architectural Glass Laminating Guide - Part 7

The difference in shape is due to the location of the delamination.

Left picture delamination is in between PVB and glass; the right picture delamination is in between regular and acoustic (softer) PVB layer (tri-layer acoustic PVB has a soft PVB core layer and 2 regular PVB layers at each side).

Architectural Glass Laminating Guide - Part 7

Compatibility problems between silicones/sealants and PVB are not reviewed in this document.

Nor are the excessive use of primers/cleaning products when gluing glass on an aluminium frame (Structural Sealant glazing) or bad installation (none or inadequate draining).

600450 Most Common Laminating Defects and Origin | Luc Moeyersons glassonweb.com

Others also read

Choosing the right interleaving powder for glass separation is crucial for protecting glass surfaces in various industries.
An equivalent temperature difference model for engineering glass design
The current paper compares experimental results obtained at different scales (from TAjoints to large scale 914mm by 1524mm) with the predictions of the analytical equations and FEA.
The use of laminated glass with PVB and ionoplast interlayers not only offers improved safety but can also be designed to help mitigate security threats ranging from basic safety to burglary and forced entry resistance and even ballistic protection.
Modern free form glass architecture has become increasingly popular in the structural sealant glazing application, as demonstrated by many iconic building projects, such as Allianz tower in Milan.

FROM INDUSTRY

Pol. Ind. Penapurreira Parcela C4-B,
15320 As Pontes de García Rodríguez A Coruña
Spain

Ottergemsesteenweg 707-Zuid
9000 Ghent
Belgium

Via per Monastier, 4
31056 Vallio di Roncade TV
Italy

No. 160 Yichuan Rd.,
Jiaonan Shi
Qingdao Shi
Shandong Sheng, 266000
China

2200 W. Salzburg Rd.
Auburn , MI 48611
United States

İçmeler Mah. D-100 Karayolu Cad. No:44A,
34947 Tuzla,/İstanbul
Turkey

ARTICLES RELATED PRODUCTS

Thermoseal Group Ltd.
Wenfrod Glass Processing Co. (Tempered Glass Factory Turkey)
Shenzhen Gaoren Electronic New Material Co. Ltd

Add new comment