Plastic Mouldings, Dip, Rotational & Vacuum Plastic Moulding Specialists
  • Welcome to Plastic Mouldings

    We are one of the UK's leading Plastic Moulding companies specialising in PVC dip moulding, rotational moulding, vacuum forming and much more

  • Over 50 Years Experience

    We have been in business within Irvine, Ayrshire for over 50 years and employ around 78 people across our manufacturing, administration and management divisions.

  • Product Design & Development

    Our product design and development team can help in growing these ideas into prototypes and production.

  • High Quality Control Processes

    We have been ISO.9002 certified since 1995 and our total commitment to produce the highest quality custom mouldings continues to today.

Material Performance

PVC plastisol - the principal material used in dip moulding - consists of PVC polymer suspended in a plasticiser to which stabilisers and pigments are added.

Tests were conducted generally in accordance with the appropriate section of BS 2782. Average results were as follows:

Material grade ref. Hardness Shore A BF softness number Specimen temperature MN/m2 Maximum stress at break Percentage elongation
PDM100 55 85 23°C 9.6 473
PDM100 55 85 65°C 9.4 460
PDM102 75 45 23°C 14.1 398
PDM102 75 45 65°C 13.6 400

Tear Strength

Tests were carried out at 23° C generally in accordance with BS 903.
Average results were as follows:

Material grade ref. Hardness Shore A BF softness number Tear strength
PDM100 55 85 27.4
PDM102 75 45 50.6

High Temperature Performance

Mouldings made from plastisol soften and become more elastic with increasing temperature. We would not recommend the use of mouldings produced from general grades of plastisol at continuous temperatures above 65° C. Specialised grades such as PDM 100 HT are available and they can be used at continuous temperatures up to 90° C, with intermittent use at higher temperatures.

Electrical Insulation Properties

Tests were carried out in accordance with BS 2782:202A and 203A.
Average results were as follows:

Material grade ref. Hardness Shore A BF softness number (Ohms) Surface resistivity (Ohm centimeter) Volume resistivity
PDM 100 55 85 1.3 x 10 (12) 5.0 x10 (10)
PDM 102 75 45 1.2 x 10 (12) 3.3 x 10 (11)

Chemical Resistance

PVC dip mouldings have a generally high splash resistance to a wide range of chemical reagents. We recommend that we are advised of the environment in which the moulding is to be used in order that we can confirm the degree of compatibility and, if necessary carry out tests.

The following table gives a general guide to the anticipated resistance of mouldings splashed with various chemicals at 20° C:

Resistant Some attack
Acetic acid (60%) Hydrogen peroxide Nitric acid (70%)
Ethyl alcohol Hydrogen peroxide Sulphuric acid (80%)
Calcium hydroxide Nitric acid (50%) Degraded
Detergents Phosphoric acid (30%) Acetone
Glycerine Sea water Carbon tetrachloride
Hydrobromic acid Sodium hydroxide Benzene
Hydrochloric acid Sulphuric acid (50%) Petrol
Hydrofluoric acid Transformer oil Trichloroethylene

Material Selection

We manufacture our own PVC plastisols and have developed a large range to suit widely differing requirements. Developments of new grades continue and, if necessary we can enhance a particular property of a standard grade.

Most grades are available in black, white and a wide range of colours. Some colours are offered as standard whilst other can be matched as required. Although many grades have a high gloss, opaque finish, some can be Matte, textured, or alternatively translucent.

Your logos or other details such as operating instructions can be printed on most mouldings using highly tenacious inks.

Flame Retardancy

Additives can be incorporated in all our plastisols, except food grades, to improve their resistance to flames. The specialised grades listed above include PDM 100 FR spec.

Toxicity

Most of our plastisols are classed as non toxic. It is not possible to list the complete range of materials that can be manufactured, please consult us for further information.

GRADE REFERENCE HARDNESS SHORE A BS SOFTNESS NUMBER COLOUR AVAILABILITY FINISH TYPICAL APPLICATIONS
PDM 100 55 85 Black, white, colours Glossy or mat General purpose flexible material. Uses include bellows and electrical insulating shrouds. Good low temperature properties
PDM 101 65 65 Black, white, colours Glossy or mat Slightly stiffer material ideal for complicated ducting
PDM 102 75 45 Black, white, colours Glossy or mat Most suitable for grips, end caps and sleeves
PDM 103 85 35 Black, white, colours Glossy or mat Stiffer grade – used for boxes and covers
PDM 104 45 100 Black, white, colours Glossy Most flexible grade available – ideal for protective boots. Good low temperatures properties.
PDM 109 95 15 Black, limited colours Semi-gloss Stiffest grade available – used for pipe bends and instruments covers
PDM 100 FR Spec UL 94-VO 55 85 Black only Glossy Flame retardant grade of PDM 100
Underwriters Laboratories Inc. – yellow card certification
PDM 100 FR 55 85 White colours Glossy or mat Flame retardant grade of PDM 100
PDM 100 OR 55 85 Black, white, colours Glossy Oil retardant grade of PDM 100
PDM 100 HT 55 85 Black, white, colours Glossy Continuous high temperature resistant grade of PDM 100 up to 90°C
PDM 101 FR 65 65 Black, white, colours Glossy or matt Flame retardant grade of PDM 101
PDM 101 OR 65 65 Black, white, colours Glossy Oil retardant grade of PDM 101
PDM 102 FR 75 45 Black, white, colours Glossy or matt Flame retardant grade of PDM 102
PDM 102 OR 75 45 Black, white, colours Glossy Oil retardant grade of PDM 1021
PDM 107 55 85 White & translucent (coloured & clear) Glossy Flexible grade for foodstuff or medical applications
PDM 108 75 45 Black, limited colours Glossy As PDM 107 but for semi-rigid mouldings

 

News & Updates

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