KNOWLEDGE archivos - Oliver + Batlle

What are plastisols and how are they made?

Plastisols are compounds made with PVC resin, a plasticiser replacing Dioctyl Phthalate which provides flexibility and durability, and other additives such as calcium carbonate, epoxidised oil, stabilisers, colourants, etcetera.

Also known as PVC pastes, plastisols maintain a liquid state with visco-elastic properties when at room temperature. However, when subjected to temperatures above 43ºC, plastisol viscosity increases and, when reaching temperatures of over 160ºC, it can change from a liquid to a solid state after cooling as a result of process known as gelation.

What is thixotropy and how does it influence the manufacturing of paint and related products?

Thixotropy is a property of some products which change their viscosity and become more fluid when subject to constant shear force, e.g., in the mixing stage. The longer the fluid is under shear stress, the less its viscosity.

In normal conditions, a thixotropic fluid is highly viscous (equilibrium viscosity) but becomes liquid or more fluid when subject to shear force. This type of product takes certain time to reach its equilibrium viscosity when an instantaneous change in shear rate occurs. For example, when a mixer’s shear work is stopped or slowed down, the fluid tends to reach equilibrium viscosity, which is always higher than its viscosity when it is being mixed. Read more

22/04/2021

tipos de residuos en la fabricación de pinturas

Category Blog, Process

Types of waste in the paint and related products industry

Growing environmental awareness together with existing regulations on the subject leads to investments and adaptations being made to production processes of paint and related products in order to meet requirements.

Taking into account the environmental hazards and the types of waste generated in the industry, it is essential to be able to make strategic decisions that lead to the optimisation of production and the reduction in its environmental impact. This will lead to a more sustainable and environmentally friendly industry. Read more

31/01/2021

Category Blog, Mixing

How to Control Viscosity and Other Characteristics Specific to Paint During the Manufacturing Process

How can the viscosity and other specific characteristics of the paint be controlled during the manufacturing process? Viscosity, specific weight or colour are some of the characteristics specific to paint that must be controlled during the manufacturing process. Even if they have been previously determined during formulation, it is necessary to verify that the manufacturing […]

Dispersion, the First Step in Paint Manufacturing

Dispersion is a key phase in paint manufacturing. When it comes to emulsified paints, for example, it is widely considered as the most important phase.

The goal in the dispersion phase is to cause most of the agglomerated pigments and fillers that are part of the formula to be stably separated as individual particles. Read more

12/08/2020