HRANIRESIN 41 - Urea-formaldehyde resin

Hraniresin 41 is a new generation of urea-formaldehyde resin with a low formaldehyde content. Characterized by high yield value, good solubility and no oozing, it is used in the wood industry for cold and hot-setting, and high frequency bonding.

USE / EXAMPLE OF USE

• gluing plywood, core boards
• gluing paper, veneer

TECHNICAL DATA & SUITABLE WORKING CONDITIONS

Argument	Value
Form	Powder
Colour	White or walnut
Viscosity (Brookfield 20°C) solution 2:1 in water	2 500 – 5 500 mPas
Specific gravity	0,5g/m3
pH at 20°C	5 - 6
The product must be diluted in water in approx. 65% solid content as in the following formulation:
Component	Value
Hraniresin 41	10 kg
Cold water (15 – 20°C)	5 kg
Temperature	Pot lives
15°C	8 hours
20°C	5 hours
30°C	3 hours
Temperature	Hardening times
60°C	13 minutes.
80°C	140 seconds.
100°C	60 seconds.
When applying the product, curing time must be increasedby 1min. for each millimeter of wood thickness

APPLICATION / HANDLING

Apply using an applicator with rollers, spatula or brush. The amount of glue must be smeared according to the type of material used (generally between 100 and 200 g/m2 )
The working pressure of the press depends on the materials used, and ranges from 0.8 to 2 kg/cm2.
It is desirable to prepare the gluing mixture in non-metal containers or in stainless steel containers.

WARNING

Check frequently that the glue still feels damp and sticky when pressing it. Wood like birch, rosewood, teak, fir-wood and brias in general may sometimes require a special formulation. The dluing mixture shoudl preferably be prepared in non-metallic vessels, or in stainless steel.

Before use in production, you must carry out your own tests and test all substrates before the gluing process.

PRECAUTIONS FOR SAFE USE

Please consider the material safety data sheet of the product prior to handling.

STORAGE

Store in original and sealed packaging at a temperature of 10 - 30°C. Shelf life is 9 months at 20°C. This product is hygroscopic and must be protected from contact with humidity. Contact with humidity may lead to the formation of blocks and the glue may become unusable.

TRANSPORT

For information on safety and handling during transport, see the safety data sheet.