What is PVB Resin?
Polyvinyl butyral resin is a solvent-based resin synthesized from polyvinyl alcohol (PVA)
and butyraldehyde in an acetal reaction under the action of a catalyst.PVB resins have a
range of superior physical and chemical properties, including high transparency,
elasticity, toughness, alkali resistance, oil resistance, flexibility, low-temperature
impact resistance, etc. In addition, PVB resins have good adhesion to metals, ceramics,
plastics, leather, and wood and exhibit good adhesion to other resins (e.g., epoxy
resins, phenolic resins, etc.). In addition, PVB resins have good adhesion to metals,
ceramics, plastics, leatherwood, etc., and good compatibility with other resins (e.g.,
epoxy resins, phenolic resins, etc.)
What is PVB Resin used for?
Safety glass manufacturing: PVB resin is an interlayer material used in the manufacture
of safety glass for automobiles and buildings. When glass is impacted, PVB film prevents
glass fragments from flying and maintains the integrity of the glass, increasing
safety.
Coatings and Inks: PVB resins are used as components in primers, baking paints, wood
finishes, and printing inks, providing excellent adhesion and weathering
resistance.
Electronics & Electrical: PVB resins can be used as binders for electronic ceramics and
printed circuit boards, as well as modifiers for hot melt adhesives to improve product
stability and reliability.
Textile processing: PVB resin can be used to waterproof textiles, providing excellent
waterproofing and anti-pollution properties. It creates strong adhesion with various
fiber materials, allowing textiles to maintain their original softness and
breathability.
Other adhesive applications: PVB resin can also be used as an adhesive between metal and
metal, metal and plastic, providing good adhesion and weather resistance.
Ceramic powder processing: PVB resin can quickly dissolve in most polar and non-polar
solvents due to its special particle porosity and surface properties, making ceramic
powder obtain good strength and softness for processing and molding.
How is PVB Resin produced?
Raw material preparation: After specific quality checks and pretreatment of the two raw
materials, polyvinyl alcohol (PVA) and butyraldehyde, add catalysts, and stabilizers to
promote and control the acetalization reaction.
Dissolution and filtration: the raw materials and additives are mixed and gradually
converted to liquid form under heating conditions. The solution is then passed through a
filtration unit that removes impurities and solid particles to ensure the purity of the
resin.
Degassing and cooling: The filtered resin solution is degassed to remove air bubbles and
excess water. The degassed resin solution is then passed through a cooling unit and
cooled to a suitable temperature for subsequent processing and molding.
Extrusion & Drawing: The cooled resin solution is extruded and stretched to the required
size and thickness using a drawing machine to form the PVB film.
Curing & Cutting: The drawn PVB film is cured by high temperature and pressure to
cross-link the resin molecules in the solid state, increasing the strength and
durability of the film. The cured PVB film is then cut by cutting machines to the
required size for subsequent use.
How is PVB Resin packaged and stored?
Packaging: PVB resins should be packaged in well-sealed packaging materials that are
shielded from sunlight, such as ziplock bags or drums, to prevent the ingress of air,
moisture, and other contaminants and damage from ultraviolet rays in sunlight.
Storage: PVB resin should be stored in an environment with stable temperature and
humidity, and the storage area should be kept clean to avoid dust, impurities, and other
contaminants from entering the package.
What are the precautions for the use of PVB Resin?
PEnsure that the operating area has good ventilation conditions and avoid prolonged
contact with resin or inhalation of dust generated by it to reduce irritation to the
respiratory tract and skin.
When handling PVB resin, appropriate personal protective equipment, such as protective
glasses, protective gloves, and respirators, should be worn to prevent direct contact
with the resin with the skin and eyes and to reduce the risk of inhaling resin dust.
