Please note that we only supply polymer in granular form for Injection Moulding or Extrusion applications. We do not supply polymer in rod, sheet or block form.

    Our team are available from 8am-5pm and we always aim to get back to you the same day. If you would rather contact us immediately please join us on live chat or give us a call on 0141 952 1900.

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    Transparent ABS can be a clear winner

    Transparent ABS. Mentioning transparency in the context of ABS moulding materials can raise a few eyebrows. This is because ABS is normally taken to be opaque and indeed the vast majority of grades of ABS are opaque.

    MABS trap Transparent ABS
    clear ABS

    ABS is a two-phase system which can be considered as small rubbery particles dispersed in a rigid thermoplastic matrix of styrene-acrylonitrile copolymer (SAN).  The SAN provides stiffness and the rubber particles provide impact resistance. One feature of a two-phase systems is that light gets scattered as it passes from phase to phase. This results in very low light transmission levels.  As explained in a previous blog, it is possible to minimise scattering of light and maximise transmission if the two phases have similar refractive index values.

    Manufacturers of ABS soon discovered that incorporating methyl methacrylate (MMA) monomer into the SAN rigid phase and tinkering with the composition of the rubbery phase resulted in matched refractive index values and hence high transparency could be achieved.

    Of course tampering with the chemical composition has a knock-on effect on other properties.  Clear ABS (strictly speaking MABS) cannot compete with the impact resistance of impact grades of ABS nor the heat resistance of high heat grades of ABS.  However clear ABS can outperform polystyrene, SAN and PMMA for impact resistance and has similar heat distortion temperatures.  Polycarbonate can outperform clear ABS for both impact resistance and high temperature performance. However, clear ABS scores well for stress crack resistance and processability, with good melt flow characteristics.

    Typical applications include domestic goods, cosmetic packaging, medical components and sports and leisure goods.

    Trade Names: ‘Terlux’; ‘Cycolac’: ‘Polylux’: ‘Starex’

    For information on all the specified grades that we can offer please contact us today or try our polymer search.

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    Coping with weld lines

    In injection moulding, weld lines (knit lines) form when two melt fronts meet. If the melt fronts do not coalesce completely, at best there will be a cosmetic flaw. At worst there will be a mechanical weak-spot, with strengths of the order of 10 - 90 % of the material potential.

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    What determines friction between thermoplastic components?

    Friction is an important property for thermoplastics in bearings and gears but also has a part to play in assembly of plastic parts (snap-fit and interference-fit) and ejection during moulding.

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    Polypropylene: the Workhorse of the Plastics Industry

    Polypropylene. Little did Karl Zeigler or Giulio Natta realise, 60 years ago, when they were developing a catalyst system to produce a useful thermoplastic from the inexpensive monomer, propylene, that their work would have such far reaching consequences.

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    What makes medical grade plastics so special?

    Toughness and transparency are important properties for the constituents of intravenous lines.

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    The Long and the Short of Fibre Reinforcement of Thermoplastics

    Fibre Reinforcement. The advantages of adding glass fibre to thermoplastics to increase stiffness (modulus), strength, heat distortion resistance and dimensional stability are well known.

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    What causes mouldings (and moulders) to be off-colour?

    When mouldings are not the intended colour, the first thing to check is the raw material, particularly the dosing rate, if you are using masterbatch, and the quality of regrind.

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    Understanding the difference between SBS & SEBS thermoplastic elastomers?

    The difference between SBS and SEBS thermoplastic elastomers explained.

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    Is MFR really much help to moulders these days ?

    Often a moulder has to change material grades. One of the first properties to be consulted on the new data sheet is usually the MFR. This is to establish if the new grade has the same melt viscosity performance.

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    What gives Moulders a Warped View on Life?

    Warping is one of the most frustrating injection moulding faults. This is because it does not always appear immediately, the causes are complex and prevention is difficult.

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    Why is Mould Shrinkage the Source of so many Disputes?

    Consider when thermoplastic melt in a mould cavity cools from processing temperature to room temperature.

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