Flocking with F58-06 Vinyl Acetate Acrylic Adhesive

F58-06 is a relatively soft, medium viscosity, heat cross-linking, vinyl acetate acrylic ester water based adhesive suitable for use a wide variety of substrates. It is formulated to attract flock. F58-06 provides excellent bonds to board and to wood composites and as it can be crosslinked at temperatures over 50°C adhesive has good resistance to moisture, but its washability has not been tested. It is suitable for use in for use in packaging and film lamination due to its good bonds to low energy substrates including PVC foils, polyester, polystyrene and coated cellophanes together with paper and board. As the adhesive has heat seal properties it can be used for some label and foil applications.

F58-06 is characterised by its good wet grab, good setting speed, good heat, moisture and plasticiser resistance.

F58-06 may also be used for plastic flooring, non-wovens and fabrics and a higher viscosity version is available on request tighter with colours.


Materials F58-06 Acrylic is suitable for:

  • Plastics
  • Polystyrene
  • Wood
  • Wood composites
  • Board & Paper
  • Carpet
  • Felt
  • Fabrics

Preparation of the substrate

The substrate must be clean, dry and grease-free before the adhesive is applied. It is important that the adhesive coating does not get absorbed by the surface of the substrate, therefore, with porous substrates (e.g. wood, chipboard, etc), a primer (such as PVA glue) may have to be used prior to the adhesive. A thick layer of adhesive must be applied (approximately 1/10 of the length of the flock fibre), so that the flock can adhere adequately to the substrate.

The adhesion to metals and plastics is considerably improved after the substrate has been wiped with a solvent, such as acetone. The solvent not only acts a de-greaser, but it also works to key the substrate, enabling a stronger bond with the adhesive.

The adhesion to low energy plastics can be improved by surface treating the object first. There are a few different treatments that can be used such as Plasma Etch, Hot Air energising and flame etching.

Method of Application

There are various ways to apply the adhesive; any way that you can apply paint to a surface is also a possible way to apply the adhesive. Any of the following methods can be used (although some will be more successful after the viscosity of the adhesive has been reduced):

  • Paint Brush
  • Paint Roller
  • Spray Gun
  • Screen Printing ( with high viscosity variants)

The adhesive must only be applied to the parts of the substrate that require flocking. 

Curing Times

The adhesive is air drying but durability and moisture resistance need the adhesive to be cured above 50°C to allow crosslinking to take place

Using Pigments

Pigments can be added to the adhesive, in order to achieve a seamless finish, where the substrate is a markedly different colour to the flock being used. In addition, it the substrate comprises more than one colour, adding pigment to the adhesive will prime the substrate, giving a uniform appearance. The adhesive is matched to the flock in colour. This also compensates for areas with a slightly lower flock density (e.g. in interior corners).

When applying a dark flock onto a bright substrate a few percents of pigment added are quite sufficient. At least 10% of white pigment has to be added to the adhesive for white flocking onto dark surfaces. When you are flocking a lighter coloured flock onto a darker coloured substrate (e.g. yellow flock onto a blue substrate) it will be necessary to add white pigment, as well as pigment matching the colour of the flock, to the adhesive in order to attain the appropriate finish.

Reducing the viscosity of Aqueous Adhesives

All our aqueous adhesives can be used straight from the container, they can also be diluted with water. By thinning down the adhesive, you increase the range of possible uses, for example, priming a substrate or spray application.

To thin down the aqueous adhesives, simply use clean water. The adhesive can be thinned down by upto 8%.

Storage

F5716 Acrylic should be stored in well sealed containers (to prevent the evaporation of water and the formation of a skin on the surface) away from heat, direct sunlight and frost, at temperatures between 5°C and 25°C for not more than 6 months. Higher temperatures will affect quality and cause the formation of crusts and skins, especially if the containers are not tightly closed or subjected to direct sunlight for long periods.

Cleaning

Equipment may be easily cleaned with water if the adhesive is liquid, however, in the event of the adhesive drying, solvents e.g. Di-Limonene, Trichloroethylene or MEK will be necessary to remove the dried film. It is therefore recommended that the adhesive is cleaned off while it is still wet, as solvent use should be avoided wherever possible.

Screens should be cleaned regularly before the adhesive dries.

Health & Safety

F58-06 Acrylic is classed as having low level hazard if handled with normal care. However, it should not be ingested and care should be taken to avoid contact with skin and eyes. Splashes should be thoroughly rinsed with water.

Spillages can be absorbed with sawdust or other suitable material and small quantities may be washed away with water according to Local Authority Regulations.

The adhesive is water-based and is, therefore, non-flammable.