News
Hot Melt Classification: Base polymer EVA
Ethylene vinyl acetate (EVA) is a base polymer commonly used in standard adhesives. It is the basis of hot melt adhesives used in floristry, handcraft and the packaging industry, amongst other sectors.
EVA based hot melts are 100% solid and transparent in their basic form. They are multicomponent systems in which the properties can be adjusted by skilfully combining various polymers and additives. EVA hot melt adhesives contain about 33% polymer. These polymers have good compatibility with the additives. Additives can include resin, wax, oil, fillers and tackifiers with which the flowability, cure time, setting time, softening point or colour are controlled. The adhesive acquires its characteristic properties from the recipe.
Lamination using multiline
Mineral wool is often used as a non-flammable insulation material when thermally insulating a building. In this case the insulation materials are normally bonded with films of different types. Multiline application heads are often used to apply the hot melt adhesives to the films or the substrate materials. These special application heads are suitable for this process, because the structure of the substrate material is often uneven, the area to be bonded is large and the application should be applied evenly. Multiline heads are not identical to the multi-head system in which every head can individually be controlled.
The multiline heads for endless application are fitted with closely spaced nozzles. Several adhesive lines can be applied simultaneously with very close spacing. The system is known as a multiline application head from four nozzles upwards. Versions of up to 100 line nozzle fittings are being used by some customers at present.
On soft soles - impact sound insulation
Footfall sound is the sound which is caused by people or machines moving over a base such as the floor. The resulting noises are perceived by our senses. Architectural acoustics differentiate between footfall sound and walking noise. You can find out how hot melt adhesives support the acoustics in various rooms in our article.
Footfall insulation
Walking noise is, for example, the noise made by heels tapping on hard floors. Reduction of the noise is achieved by the selection of a sound-absorbing floorcovering. Walking noise is only perceived in one room. Laying carpets in the room aids reduction of the noises.
Footfall sound has to be taken into account during building shell construction. Perception of footfall sound takes place in rooms which are next to, underneath or above the sound source. For example, in older buildings one can hear the washing machine spinning or could even plot a movement log for the neighbour's kids.
Roller shutters - Not just to keep draught out!
Just carry out a simple test. light a candle and hold it at a roller shutter housing. Does the candle flicker?
If it does you can be sure the housing is not seal-tight - your expensive heat escapes outside. A roller shutter housing insulation can prevent this.
Enhance your possibilities for developing new business and improving your relationship to your customers
Enhance your possibilities for developing new business
Our training offer
A two-day-training with following training modules is planned free of charge at our headquarter in Bremen, Germany in March 2017:- Technical and/or commercial Information about working with BÜHNEN hot melt and applicator systems
- Basics of hot melt adhesives
- Selected hot melt applications in different industries
- Selected products for opening up new business
- Tips and tricks for setting-up, handling, doing simple repairs and maintaining applicator systems
The training is free of charge! You only have to cover your travel costs which would be a profitable investment for sure.