TESTED AND APPROVED

For over 30 years, TWEHA’s bonding tests have been recognized as the world standard for a consistent and uniform test on behalf of bonding façade panels requiring a bond strength that exceeds the tear strength of the adhesive in harsh conditions.

The previously tested and approved durable adhesion on more than a hundred different types of façade panels is regularly assessed and we are pleased to inform you that our latest tests have again confirmed the acceptance and approval of the sustainable adhesion on above mentioned brands.

Are you curious about the latest test reports? Call our helpdesk +31 88 600 3 600 or send your inquiry to info@tweha.com.

BASIC CONCEPTS ON FIRE DEVELOPMENT, FACADE CONSTRUCTION 

Conforming the European directives the relevant fire safety requirements in the regulations have the following objectives:

• the capacity of structures during a given burn time guarantee
• the production and spread of flames and smoke limit
• the risk of spread of the fire to neighboring construction limit
• the attendees the chance to evacuate the building or to be helped
• take into account the safety of the intervention teams.
To meet these objectives, concerning wall cladding the following requirements are applicable:

• the fire stability
The standard fire shows a common known conventional fire-curve. These nominal curve does not depend on parameters that the actual fire in the fire compartment influence as the fire load, the ventilation conditions and the active fire prevention measures as sprinkler systems.
The standard fire curve (black) is shown, with different other nominal fire curves, in figure below. For comparison, also an arbitrary example of a natural fire curve (blue) is given.
A natural fire curve is a curve that is calculated on the basis of the main parameters that determine fire development in the compartment. A natural fire curve is characterized by its growth phase, heating phase and cooling phase. In the growth stage, the fire is still local. There exist many differences in temperature in the compartment.
In the transition from the growth phase to the phase of a real fire, the fire expands rapidly to the entire compartment. This is called the flash-over Read more

PROPER PRE-TREATMENT ESSENTIAL AT GLUE COMPOUNDS

Before you start with assembling two materials by means of an adhesive bond, the surfaces must be dry and properly cleaned and degreased first.

CLEAN
Always assume that the surface to be bonded is contaminated and therefore clean both surfaces with TWEHA Cleaner+ and a cloth. TWEHA Cleaner+ is a bonded-cladding-detergent based on Isopropyl alcohol.
Always use a lint-free, non-coloured cloth that does not contain any additives, contaminants or polishes. Clean by rubbing in only one direction, otherwise the contamination on the fabric may end up on the surface again. Never use a cloth several times.
Do not touch the cleaned surface with your fingers again, otherwise skin grease will be on the surface again.
Never use thinner or a gasoline based liquid for degreasing! These are so-called petroleum derivatives and these only make the subsurface more greasy!

RETURNING OR SANDING
If needed roughening ensures that the adhesive can flow in a roughened surface. This increases the adhesion surface and creates a better connection.
Note: the adhesive layer of THEHA Tape will not flow, so when roughening a smaller adhesive surface is created, so, in case of an aluminum framework, never roughen the surface!

THE MOST COMMON POLLUTION:
Fiber cement: Loose fibers and cement granules
HPL: residue of protective film
Natural stone: sludge or residue from sawing process.
Tiles / ceramics: Cleaners and moisture
Metal: Oil, grease, rust and moisture
Glass: Fingerprints, silicones and moisture
Plastic: Release agents, dust and plasticizers
Rubber: Talc, grease and plasticizers

 

Before starting check with a peel-of test.

ECOLOGICAL COMMITMENT

The care and conservation of the environment has always been one of TWEHA’s major concerns. Sustaining our lifestyle and the crucial environmental balance that this implies requires specific policies and tangible actions.

TWEHA has always been well ahead of market trends in this area, and for more than 25 years has been implementing improvements to its production systems, aimed at minimising their impact on the environment.

TWEHA’s environmental strategy goes far beyond the optimisation of production systems; indeed, our efforts are also centred on the introduction of products and packaging that contribute to the reduction of enviromental impact

gevels verlijmen in de winter

BONDING CLADDING IN WINTERTIME

Bonding in wintertime impossible? Only bondingsystems that need a primer!

This limitation is in fact caused by the nonfunctioning of primers at lower temperatures, but Tweha’s bonding products do not need a primer!
So the absence of a primer makes it possible to process the glue system at low temperatures (<5 ° C).

Recent testing in Austria once again proved that the bonded connection functions perfectly after processing at -15°C (5°F)!