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Contact Info
198 West 21th Street, Suite 721
New York, NY 10010
youremail@yourdomain.com
+88 (0) 101 0000 000
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+268 2518 6200 | info@starpaint.co.za

Star Wood Glue (SWG)

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Description

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  • It is multipurpose polyvinyl acetate based adhesive (PVA) for wood and paper
  • It dries to form a tough, non-visible glue-line which is stronger than wood
  • Available in 1kg, 5kg & 23kg packs

USES

  • Suitable for assembly, doweling, laminating, veneering and finger-jointing processes

FEATURES AND BENEFITS

  • High strength – final bond stronger than wood
  • Long open time – long assembly time
  • Versatile – bonds to a variety of porous substrates
  • Water-based formulation – cleans up with water, non flammable
  • Low VOC – non toxic

ADHESION

  • Excellent adhesion to medium woods (Beech, Oak), soft woods (Pine, Meranti) and processed boards (hardboard, chipboard, supawood, high pressure
    laminates), leather, cloth, felt, paper, cardboard, cork and most other porous materials

LIMITATIONS

STAR WOOD GLUE is not intended for exterior use or where moisture is likely. If STAR WOOD GLUE is to be used outdoors, or if it will be exposed to the elements, the joints should be covered with paint or varnish once the adhesive has cured.
It should not be used to adhere coated woods, synthetic woods and melamine. Not for structural or load bearing applications.
Do not use when temperature, glue or materials are below 4°C.
Because of variances in the surfaces of treated lumber, it is a good idea to test for adhesion.

SURFACE PREPARATION

The surface must be clean, dry, and free from all loose materials, dust, dirt, rust and any other contaminants. When working with woods that are oily or high in tannic acid, wipe the joints with acetone before gluing. Acetone clears the contaminants from the wood pores on the bonding surface and dries quickly without leaving any residue.
For the best result, planning of the wood should take place within 24 hours of gluing. After this time, the cell structure of the wood closes, which may significantly reduce the ability of the glue to penetrate sufficiently, resulting in a poor bond. For hard and oily woods, we recommend resurfacing within 2 hours of gluing the moisture content of the wood should be between 8 – 12%. Higher moisture content will result in longer pressing times and will lead to risk of delaminating and wood splitting due to shrinkage of the wood on either side of the bond-line.
To avoid wood shrinkage or swelling after processing, it is very important to ensure that the wood is dried to a moisture content corresponding to the equilibrium moisture content (EMC) at the site where the article will be used. EMC is the moisture content of the wood that corresponds to a given relative humidity. If the moisture content of the wood is higher than EMC, it will lose moisture until it reaches EMC. A corresponding shrinkage in the wood will occur which may result in delaminating along the glue line and/or wood splitting.
Care should be taken to ensure a tight fit between wood pieces with no saw marks and no burnishing of the surfaces to be glued.
As a caution, it must be remembered that poor surface preparation may result in the delamination of the glued joint.

INSTRUCTIONS FOR USE

  • Ensure that surfaces are prepared as above to ensure that all joints fit tightly
  • For a successful gluing operation, consideration must be given to each of the following points discussed in detail below: glue spread rate, assembly time, press time, press temperature, and press pressure
  • Apply glue with a roller, wheel, toothed trowel, brush or spatula. Apply a spread rate of approximately 200g/m2 (glue “squeeze out” should be seen coming from the joint)
  • The glue spread rate is dependent on the object of gluing and the wood species, and must be determined in each specific case. When gluing hard and oily wood species, the substrates should be newly planed and the adhesive should be spread on both surfaces
  • Foiling and veneering applications will require a lower spread rate of approximately 60g/m2 and 100g/2 respectively
  • The assembly time refers to the time lapse between glue spreading and application of pressure. The time between glue spreading and closing the assembly is open assembly time, which in the case of STAR WOOD GLUE is approximately 10 minutes at 21°C and 50% relative humidity. The time between closing the assembly and pressure application is called the closed assembly time, which is approximately 10 minutes
  • It is recommended that only the amount of adhesive that can be used within this period be applied at any one time. The assembly time is influenced by the glue spread rate, environmental conditions, and wood species. Assembly time is increased by cold weather, high humidity; high spread rate and high-density wood species (slow absorption of the adhesive into the wood)
  • Press time is dependent on wood species, moisture content and environmental conditions. Cold temperatures and higher humidity levels may require longer press times. Denser wood species, oily woods and those with higher moisture content will also require longer press times. We recommend pressing an unstressed joint for 60 minutes to four hours
  • Temperature in the glue line can be between 4 – 70°C. Use of the adhesive below 4°C will result in ‘chalking’ and subsequent delamination.
    Higher temperatures (up to 110°C) can be used if the press times are kept very short. For press temperatures above 50°C, it is recommended that the shortest possible press time be determined. Above 70°C, it is necessary to do this because the glue is thermoplastic, and at higher temperatures an opening of the bond line can occur when the pressure is released because of the thermoplastic nature of the glue. The thermoplastic properties will increase with higher temperatures. When using HF-pressing the thermoplastic properties are more pronounced and therefore an after-pressing time is recommended in order to achieve a distribution of the heat in the glued construction before the pressure is released. Highest bond strengths are obtained using high clamp strengths and extended clamp times
  • Appropriate press pressure is essential for a successful bond. Sufficient press pressure is required to bring the joint tightly together. Too high pressure and short assembly times when gluing hard wood species may cause the glue to be squeezed out of the glue line, resulting in glue starvation and delamination. Too little pressure will not bring the surfaces together closely enough to form a strong bond along the glue line. 100-150 psi (7-10 bar or kg/cm2) is recommended for soft woods, and 125-175 psi (9-12 bar or kg/cm2) for medium woods. Clamps should be positioned a minimum of 4cm away from the sides, and evenly spaced at 20-30cm throughout the piece. Remove excess glue immediately by wiping with a clean damp cloth
    Star Paint
  • Glue joint “squeeze out” may make the area around the joint difficult to stain. Although sanding the area will help, we recommend using masking tape to cover the areas that you do not want exposed to glue
  • STAR WOOD GLUE does not discolor wood; however, iron which might come from the glue spreader, rusted cutter blades, or from tannic acids in some wood species, e.g. oak, may contaminate the glue and darken the glue line. For this reason, always use clean, sharp, and un-rusted cutter blades for cutting the wood and avoid using metal tools with the adhesive
  • Machines and tools can be cleaned with water. Glue spills on carpets can be cleaned by placing a wet cloth over the glue and covering with a plastic sheet
    Leave overnight to allow the glue to soften – remove with appropriate tool

DIY TIP

  • Make your own woodfiller by mixing STAR WOOD GLUE with sawdust

APPLICATION

  • Minimum application temperature 4°C
  • Spread rate Approximately 200 – 250g/m2 for assembly
  • Approximately 150 – 200g/m2 for laminating
  • Approximately 100 – 150g/m2 for veneering
  • Approximately 60 – 90g/m2 for foiling
  • Assembly time (21°C at 50% RH) 10 minutes (Open)
  • 10 minutes (Closed)
  • Press time (21°C at 50% RH) Unstressed joints: 1 – 4 hours
  • Stressed joints: 24 hours
  • Press temperature Room temperature to 110°C
  • Press pressure Soft woods : 7 – 10 Bar
  • Medium woods : 9 – 12 Bar
  • *Please refer to “Instructions for use” section for further details

STORAGE STABILITY

  • STAR WOOD GLUE has a shelf life of at least 12 months if stored in a cool (below 25°C), dry place in its original moisture-tight container. The glue should not be stored below 0°C or above 30°C
  • If the material is kept beyond the recommended shelf life, it is not necessarily unusable. A check should be performed to observe whether the product has not separated, thickened, or shows signs of bacterial degradation (bad smell, discoloration and low viscosity)
  • To maximize the shelf life of the opened container, ensure that the packaging is closed to create an airtight environment when not in use. If the packaging is left open for long periods, the glue will thicken and form a skin on the surface, which can damage pumps and block filters

SAFETY INSTRUCTIONS

  • When working with STAR WOOD GLUE, it is advisable to wear gloves to avoid direct contact with the skin. Although the product is non-toxic, safe handling practices should still beimplemented to avoid irritating sensitive skin
  • If glue comes in contact with skin or eyes, flush thoroughly and immediately with water. If irritation continues, seek medical attention
  • Glue is slippery when wet, so care should be taken when cleaning spillages that occur in the home or the workplace

TECHNICAL DATA

TYPE: POLYVINYL ACETATE DISPERSION
APPEARANCE: WHITE, VISCOUS LIQUID
DENSITY APPROX: 1.06g/cm³
SOLIDS APPROX: 38%
VISCOSITY APPROX: 15000cPs
PH APPROX: 4.0
MFFT APPROX: 4°C
SHELF LIFE: 12 MONTHS IN A SEALED CONTAINER

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