A Schulman Thermoplastic Compounds Ltd

Perrite are an independent thermoplastic compounding business based in Warrington, UK and Johor Bahru, Malaysia. They specialise in the supply of compounded products to the injection moulding and extrusion industries and are a key supplier of special thermal insulation products for flexible, offshore oil pipelines.

Perrite has been in business since 1975 operating from its Warrington facility and opened its Malaysian plant in 2003. Product development is carried out at the Warrington technical centre with additional colour matching and sample facilities available from both manufacturing sites.

Perrite manufacture and distribute an impressive line up of standard and custom compounded polymers including Percom polypropylene, Perlex polycarbonate, Styralin polystyrene and Pertal POM. The product portfolio also includes the high performance Ronfalin ABS brand and prime quality polyamide Vitamide range.

Perrite’s expertise includes product tailoring to modify performance, appearance enhancement and colouring. They assist in all stages of product development, from design, polymer selection, testing and approval through to optimising tool design and processing parameters.

Perrite’s products are manufactured to provide a range of properties and performance, such as heat resistance, high impact, antimicrobial, reinforcement, flame retardancy, high gloss, chemical resistance or a variety of appearance effects.

Anti Microbial Thermoplastic Compounds

Perrite AM is a comprehensive range of custom-formulated antimicrobial thermoplastic compounds that bring the fight against harmful bacteria including MRSA, E-Coli, Salmonella and Pseudomonas Aeroginosa to your application. 


These antimicrobial compounds attack microorganisms at source, preventing problems before they occur. They have been proven to kill >99.9% of both GM+ve and GM-ve bacteria on contact. What’s more, they can also prolong product life by helping to prevent the deterioration, discolouration and bad odours that microbial organisms can create.

Typical applications in electrical appliances, where harmful microbes make stopovers on their way from one person to another, include portable handheld devices plus fixed electrical installations such as electrical light switches, switch plates and pushbuttons. Other applications include sanitary fixtures and fittings, medical equipment and bed panels and accessories

More information on Anti Microbial Thermoplastic Compounds

Anti Microbial Thermoplastic Compounds

Flame Retardent

For a full and detailed review of flame retardant materials, the technology, chemistry and science, environmental and current legislation please Click Here. Perrite are a participating member of the BSEF and are monitored for compliance to good industrial and environmental standards in relation to the processing and use of Flame retardant additives.

Flame Retardent

Impact Modified Thermoplastic Compounds

More information on  Impact Modified Thermoplastic Compounds

Heat stabilization can be described as the resistance to an unwanted and undesirable change in properties as a result of the heat encountered by a plastic material in either processing or end use. The heat resistance properties vary widely between different polymer types although this inherent and characteristic performance can be enhanced by the incorporation of carefully chosen stabilizer systems. Stabilizers are used to maintain the polymer’s appearance, strength, flexibility and toughness; the performance of the polymer’s original characteristics.

All polymer materials undergo degradation in the presence of Oxygen. Oxidation is assisted and its rate is determined by: Energy, mechanical stress, heat, light and environmental factors. Combinations of these can act very aggressively towards the polymer material. Oxidation can affect mechanical properties, produce discoloration and fading, rougher surface, decreased tensile strength and reduce life time performance.

Without the use of the proper and appropriate stabilization package, polymers will degrade. In many cases, blends of stabilizers are used to protect the polymer at various stages throughout the polymer lifecycle. Common types of stabilization package include:

– An organophosphite, used as a short-term antioxidant to protect the polymer during the high temperature and shear conditions of processing.
– A phenolic antioxidant used for long-term protection during the components service life.

The choice and addition level are dependent on both the processing history and the intended use of the material. Please contact Perrite to allow us to make the correct selection for your application.

Impact Modified Thermoplastic Compounds

Distributed Products

To complement the portfolio of compounded products, Perrite offer a range of natural material from world class manufacturers such as Sabic.

The range includes Polypropylene (homopolymer, copolymer and random copolymer), ABS, Polystyrene (GPPS/HIPS), Polyethylene (HDPE),Acetal (POM), Polycarbonate (PC), Polyamide (PA), PC/ABS and PA/ABS.

If you are currently producing using natural / Masterbatch and are experiencing any processing issues then Perrite offer custom compound solutions that have proved cost effective for many existing customers.

When you need a perfect colour across a range of polymers you can’t always risk masterbatch, especially if the polymer needs additional characteristics.

Perrite have the expertise to provide a wide range of polymers, with formulations that build in additional characteristics and every colour can be colour matched.

Distributed Products

Glow Wire Rating

Glow wire is a special flame retardant category specific to electrical components such as plugs, sockets and electrical housings and casings. Component flammability is tested using Glow Wire Tests according to IEC 60695-2-10 and/or the Needle Flame test according to IEC 60695-2-2. The specimen is considered to have withstood the GWT if one of the following applies:

 - There is no flame and no glowing on the sample.
- Flames or glowing of the sample extinguish within 30 seconds after removal of the glow wire, and if the cotton or the paper underlay doesn't ignite or burn.

The Glow Wire Test simulates thermal stresses that may be produced by such sources of heat or ignition, for example the glowing elements of overloaded resistors, in order to assess by simulation technique the fire hazard. Temperatures of glow wire test are: 550, 650, 750, 850 or 960 °C (depending on the relevant specification) All Perrite Flame retardant grades can be formulated to meet your required glow wire performance taking into consideration the shape and wall thickness of your particular application.

Glow Wire Rating

Special Effect Colours

Edge Glow Suitable for transparent colours and tints were the part edges are highlighted with intensified colour.  PC – Trans ABS

Light Diffusing Parts can be tinted to various levels of strength, giving an almost frosted or hazed appearance. Generally applied to lighting applications. Transparent materials only. 

Glow in the Dark Using phosphorescent pigment to capture light energy, these effects use that energy to create a vibrant glow in the dark appearance. Several colour options available. Suitable in PE 

Thermochromic Thermochromic colours respond to changes in temperature activating a change in colour. Specific temperature ranges can be targeted to active these changes. (Some colours are specific to certain temperature ranges ) Suitable in PE 

Pearl Finish Pearls are used to create a high luster finish and add an extra dimension above standard colours options. Finishes vary from the very fine with exceptional hiding power and almost smooth appearance too, quite large particle size giving a scattered star type effect with minimum hiding power. All unfilled materials 

Sparkle Range Using coated spherical particles these reflect the light from all angles when sat just under the surface of a moulded part, adding extra depth especially when used in transparent base materials. Better suited to transparent materials. 

Metallics A wide range of metallic finishes are available, from smooth to very course giving the opportunity to create various metal type effect finishes to a wide range of plastics. All materials

Special Effect Colours

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A Schulman Thermoplastic Compounds Ltd Overview