Polyblend is ideally placed to service the needs of its customers in supplying polymer based materials and specialty chemicals to PVC processors based in the UK. Our dedicated technical team, coupled with the links with our industry partners, enables us to provide the very highest technical service to our customers and help them achieve the polymer solutions they require through working partnerships.
At Polyblend, we supply…
Stabilisers for Heat Stability
Polyvinyl chloride (PVC) is thermally unstable at its processing temperatures. Therefore, heat stabilisers are widely used to protect the vinyl products at all process stages by improving resistance to safeguard PVC products at high temperature.
Polyblend provides technical expertise and support in advising of the correct stabiliser from its range to offer heat stability for plastisol at different processing temperatures. Also, additional attributes can be low initial viscosity control, low volatile organic compounds (VOCs), low phenol and a substance of very high concern (SVHC) free products are available for applications that require it.
Plasticisers for Flexibility
Plasticisers are colourless and odourless liquids used primarily to soften plastic. They consist of a range of substances with varying chemistries and molecules used to generally make PVC and other polymers softer and flexible. Plasticisers transform the physical properties of PVC as well as other polymers, creating a wide range of flexible and durable applications.
Because plasticisers are so widely used, they have undergone extensive testing for possible health and environmental effects and are among the most widely researched of all chemical substances. In Europe, the safe use of plasticisers is enabled by REACH, (Registration, Evaluation, Authorisation and restriction of Chemicals), the most ****comprehensive product safety regulation anywhere in the world.
PVC Polymer (resins)
Most of us use polyvinyl chloride (PVC, or vinyl) every day. Around our homes, PVC is used in a wide range of products: pipes for our fresh water, drainage pipes, floor coverings, window frames, sports equipment, cabling, tool handles, kitchen cabinetry, wall cladding and food packaging. PVC is equally useful at work where you will find PVC in furniture, stationery and in the equipment we use. Not surprisingly, PVC is the one of the most common plastics and has been in wide scale use for over 60 years. It is one of the most researched and thoroughly tested materials in the world. It meets stringent international standards for safety and health purposes for the applications for which it is used.
PVC Polymer Characterisation: Molecular Weight
PVC resins are polymerised to different molecular weights to suit the particular processing technique and end-user application requirements. Normally, for production control, the molecular weight is expressed in terms of K value. Commercially available PVC grades are commonly supplied in K values ranging from 60-80.
Blowing Agents (powder form).
Blowing agents are defined as compounds which are thermally unstable and decompose to yield gas at the desired polymer processing temperature, and are widely used to expand plastics to create a cellular foam. Most of the chemical blowing agents (CBAs) are organic chemicals. In accordance with the decomposition mechanism, CBAs are generally subdivided into two major categories: exothermic and endothermic. Customers can select the suitable type according to the environmental conditions and actual use.
Among all industrial blowing agents, ADC is the most economical and most widely applied organic chemical blowing agent. It has good dispersibility, large gas yield and nontoxic decomposition products. It is a pale-yellow colour in powder form, is odourless, and is mainly used for production of closed-cell foam products.
Viscosity and Rheology Modifiers in PVC
PVC plastisol’s (or Polymer blends) are designed to satisfy a particular rheology profile. This behaviour may be obtained by a combination of different PVC resins with different rheological behaviours to achieve the desired viscosity and rheology profile, but sometimes the addition of a viscosity modifier (depressant) is necessary.
The precise adjustment of the viscosity in every single process step is essential in PVC plastisol applications. In this way, you can ensure consistent processing and consistent product quality. This permits an easier movement with less friction of the particles and stabilises the viscosity and the storage behaviour of the entire system.
PolyBlend provides a distribution service, supported by the very highest technical service to our customers to help them achieve the polymer solutions they require. If you would like to find out more about our product range, then please reach out to me on here for more information on how Polyblend may be of help.
Are you looking for a reliable chemical distributor for your product? Are you looking for a chemical distributor with experience, expertise and a customer-centric approach? Get in touch with us at Polyblend to find out more about our products and supply.
Dip Moulding is a simple and frequently employed process used worldwide. It works by creating a ‘to-scale’ mould of the product before it is heated and dipped in a liquid PVC or Acrylic, known as plastisol. With this type of process, the speed of entry and dip time determines the shape and thickness of the final product.
PolyBlend Managing Director, Mark Stewart announces his official retirement date as Friday March 31st 2023.
Let me wish all of you – our customers, our suppliers, our staff and my network – a very Merry Christmas!