Careers Section. Addition to our web page

Hi Everyone           Another blog from Norman РNovember 2019.

Just to bring to your attention that we have added another section to our web page.

At the far right end (nothing political intended) of the menu bar you will now see the new section. It is labelled “Careers”.¬† Click on it and you will find a copy of the job advert we have just placed on “INDEED”.

This is a new idea to us and we hope, at a later date, to add some comments/ideas from existing staff – could be interesting. Of course we will be completely unbiased and only publish the good ones.

Please keep an eye on this new part of our site (as well as all the rest) as it might change quite quickly.

Cheers for now.


Sehr gute zeit in N√ľrnberg!

After a busy few weeks, thanks to the tremendous interest generated by our stand at DKT, We’re happy to say that our venture to the European Technical Rubber Convention was a great success!

Highlighting the use of Rubber crumb and Granule in rubber compounds, without the loss of properties, Our unique FKM crumbing facility and the extremely small particle size we can generate was received with great interest. We were able to show, first hand, how fine our FKM powder can be made, thus increasing the amount you can add into your compounds and saving you considerable costs without any deterioration of FKM properties.

We’d like to extend a big thank you to everyone who can to visit our stand and we hope to continue providing technical knowledge and top quality products to all our¬†clientele.

J. Allcock and Sons at DKT/IRC Nuremberg and Launch of the Multi-Language Website

We are happy to announce that we will be hosting a stand at the Deutsche Kautschuk-Tagung / IRC International Rubber Conference at the NuernbergMesse GmbH exhibition centre. We will be exhibiting Rubber Reclaim, Rubber Crumb and FKM Crumb, which promises to revolutionize the Fluoroelastomer Industry. With more and more compounders and moulders showing an interest and using our fine grades of FKM crumb, we would be happy to chat about the benefits of our product. Andrew Rushton, Managing Director of J. Allcock and Sons, and I will be manning the stand and hope to see you there to answer any questions our queries you may have.

In preparation for the conference, we have also had our website translated into French, German and Spanish. We hope this will make finding the correct product and information easier for our clients on the continent. If you find any grammatical or spelling errors on any page, please contact me and I will happily incorporate your suggestions to continually improve your experience of our website.

No Snake Silicone Oil Salesman – Allcocks Out and About in Manchester

Over the past few months, the Sales team at J.Allcock and Sons have been attending events in Manchester.

Firstly, Myself and our MD, Andrew Rushton, attended a Vistage Open day. With a lecture given by one of the masters of sales, Lars Tewes, I certainly learnt a lot about how not only are we here to help solve issues our clients may be facing, but we are also here to help spot problems or issues that may not be obvious to the client and may arise in the future. It was an extremely informative and fun day and I personally hope to put some of the lessons into practice.

Mr Rushton and Myself taking a well-earned coffee break!

I also appeared as a guest at a graduate careers event at the University of Manchester, giving advice to students on how to get into the world of work. It was good to try and help students who are in a position I was in not so many years ago to try and make the most of their time at University (maybe avoid some of the mistakes your author made!)

Your author speaking at the University of Manchester Graduate careers event.

We might be often out of the office meeting clients, but it’s also good to try and give back to the local community and devote time to personal development. By attending lectures and speeches, we hope to be able to deliver a more streamlined and dedicated service to our clientèle, react to sudden changes in a situation more constructively and continue to provide the excellence and personal focus J. Allcock and Sons is known for.

Review of the Year – 2014 @ J Allcock and Sons

2014 at J Allcock and Sons Ltd.

It’s been another great year here at J Allcock and Sons. Rubber crumb and granule sales are up on last year, with an additional granulator to be installed next year and upgrading the line at our Wellington Rubber branch. FKM crumb production has increased 20% from last year and looks set to continue to increase into the New Year. In addition to our stringent particle size laboratory testing, we have recently instigated a quick pass/fail test during production, at short regular intervals. This will maintain the quality of our material that we’re known for.

Silicone sales are also up from last year, especially our Food Grade Silicone Emulsions. Of the small number of complaints to the company, most of them were due to poor housekeeping by the end user leading to silicone splitting (for tips on how to stop this, have a look at our previous blog post ‚ÄėA Splitting Headache‚Äô).

With this sustained increase in sales, we’re also looking into expanding our storage facilities, expanding our storage capacity by tens of tonnes.

Finally, we’ve welcomed 2 new members to the company. I joined just before Luke departed for a year in Australia, and Stephen has joined to learn the ropes controlling stock and purchases.

Looking to the New Year, we expect to continue our personalised service for our clients and welcome new clients from both the UK and the continent, thanks to our upcoming foreign language translations of our website. We’ll also be at DKT (Deutsche Kautschuk-Tagung) 2015 in Nuremburg in the summer to show our crumb and rubber reclaim to the European Rubber Community.

We’d like to say a big thank you to all our clients for continuing to choose us as there supplier, and the staff at J Allcock and Sons for a great year. We wish you all a merry Christmas and a happy 2015!

Matt Darlington

Allcocks at the IRC Rubber Convention 2014 – Manchester

As we blogged at the time, we attended and manned a stand at the IOM3’s Rubber Convention this year in Manchester. We enjoyed meeting many people from the rubber industry as well as those researching the next big developments for rubber.

Andy Rushton and our stand at the IRC Rubber Convention 2014

Over the two days of the convention (14th and 15th May) we gave out two copies of a history of Manchester in photographs. The first was won by Ms Karin Janet Stein Brito (see picture below) of the Polymer Technology Centre ‚Äď SENAI in Brazil, whilst the second was won by Mr Bill Adam of Adam Polymer in the UK.

We look forward to the next conference and hope to spread the word of Rubber Reclaim and Rubber Crumb such as their benefits in formulation and myriad uses.

Rubber Reclaim Part 2

Although we’ve blogged about Rubber Reclaim in two previous posts (31/08/12 & 13/09/12), we thought another blog would reinforce Rubber Reclaim as a viable rubber hydrocarbon source, carbon black source and¬†process aid.

In the 31/08/12 blog, which is still available to read, we wrote about how it is made, its basic properties and why a compounder should use it. In this post we hope to expand on these slightly and talk about ourselves, as UK and European suppliers of Reclaim.

How Rubber Reclaim is made:

Step 1) Collection and Selection of suitable materials

This is probably the most important step. In order to get a uniform and consistent product you have to use the correct materials. This is a part of the process that for many years has been overlooked hence producing inconsistent materials.

Step 2) Reduction in size and removal of contaminants.

In Tyre Reclaim this consists of removing the bead wire, cutting out the side wall then granulating the remaining materials to 2-4mm removing textile and metals.

In Butyl Reclaim Tubes are de-valved  and patches removed before being granulated.

Step 3) Blending

The rubbers are mixed with the chemicals required and the oils needed for the reclaiming process to take place.

All the chemicals and oils used today are REACH registered and compliant on PAH’s

Step 4) Cooking

This is where the materials are heated up. There are 2 main ways this is done either using an extruder to produce mechanical heat. Alternatively the materials are cooked in a digester using steam pressure to give 160¬į C

Step 5 ) Mastication

Either in the extruder or on a 2 roll mill the rubber is worked which breaks the polymer chain, also refining and blending the reclaim

Step 6) Filtering

The better quality producers at this point extrude the materials through a 60‚Äôs mesh (250 ¬Ķm) filter to remove any undigested materials (nibs)

Step 7) Finishing

The filtered material is either extruded into blocks or is put back on a mill where a paper thin sheet is built up to 15mm thickness before being cut into blocks, coated in anti-tack agent and weighed off into the desired bundle weight (normally 25 kilos, but any bundle size is possible on request)

So why should you use Rubber Reclaim?

3 Reasons; RHC Source, Carbon Black Source and Processing Aid.

1) Rubber Hydrocarbon Source

Reclaim is a more cost effective source of rubber hydrocarbon than virgin rubber.

  • Attractive Price – Reclaim generally contains 50%+ RHC . For every 1% Reclaim you add you save 0.6% on Compound Cost*
  • Price Stability – Prices¬†are not affected by NR and SBR prices.

* Based on an average compound cost of £1-70/kg

NR Prices versus Reclaim Prices

NR Prices versus Reclaim Prices

2) Carbon Black Source

  • Tyre reclaim contains approximately 27% of reinforcing Carbon Black
  • Easy to use as a Black Masterbatch
  • Much cleaner and easier to handle

3) Processing Aid

  • Improved Processing
  • Uniformity
  • Low Heat Development
  • Low Thermoplasticity
  • Minimum Reversion
  • Low Swelling and Shrinkage
  • High Rate of Cure
  • Good Aging
  • Good Shape Retention
  • Improved Tack

Other Savings include reduced mixing times and power consumption


There are 3 main types of rubber reclaim; tyre, butyl and EPDM. These reclaim serve a number of markets:

1) Tyre Reclaim

  • ¬†Tyres- New
  • Retreading
  • General Moulding
  • Belting
  • Adhesives
  • Footwear
  • Sheeting/Matting

2) Butyl Reclaim

  • Inner Tubes
  • Tyre Lining
  • Tyre Repair
  • Cable Bedding Compound
  • Sound Reduction
  • Sheeting & Belting
  • Mastics and Adhesives

3) EPDM Reclaim

  • Automotive Extrusions
  • Hoses
  • Civil Engineering Extrusions
  • General Moulding
  • Roofing Membrane

Where do J. Allcock & Sons fit in?

J. Allcock & Sons are UK distributors of¬† Rubber Reclaim for GRP Limited, who are based in India and have a maximum capacity of 89,000MT’s per year.

We have been supplying reclaim from GRP Limited for many years and have proven it to be a successful partnership and have expanded our customer base overseas.

Although GRP Limited have distributors all over the world, any enquiries are welcome and if we cannot supply GRP Products to your location ourselves, we would happily point you in the right direction!


To conclude this post. Please do not hesitate in emailing  or phoning on +44 (0)161 223 7181 for any enquiries or information on reclaim. We firmly believe reclaim has a place in todays rubber compounding market.


ISO 9001:2008

J. Allcock & Sons have been certified ISO 9001:2008 since 14th of January 1997. This month we had our re certification audit and have now gained certification up until 9th March 2016.

We are proud to be certified ISO 9001:2008 and believe this shows our commitment to keeping high standards and customer satisfaction throughout our organisation. We also believe we are probably the only rubber recycler in the UK to attain this certification.

ISO 9001:2008 Certificate



Butyl Reclaim (GRP BRI 75R) Now Stocked

J. Allcock & Son’s will now be STOCKING GRP BRI 75R Butyl Reclaim (Formerly BT.999.)

We have decided to take this important step forward in butyl reclaim supply, as there has been a huge increase in demand over the past year and we expect this to continue throughout 2013.

J. Allcock & Son’s, where possible will always try to be your most flexible supplier. We understand the need to deliver a high quality service. After all, what is the point of using a high quality product, if you do not know that you are going to receive it when you need it?

  • GRP BRI 75R is manufactured by Gujarat Reclaim & Rubber Products Ltd., India.
  • GRP BRI 75R is a reclaimed rubber made from Butyl inner tubes, together with reclaiming aids.
  • GRP BRI 75R is PBN free and PAH conformant.

Product Description

  • Colour: Black
  • Form:¬†¬† ‚ÄúBlanket‚ÄĚ


  • Carbon Black:¬†¬†¬†¬†¬†¬†¬†¬†¬† ¬† 32 ¬Ī 4%
  • RHC (by difference):¬† 50% min
  • Ash Content:¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬† 4¬†¬Ī 2%
  • Acetone Extract:¬†¬†¬†¬†¬†¬†¬† 9 ¬Ī 3%


  • Specific gravity:¬†¬† ¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬† 1.14 ¬Ī 0.02
  • Mooney Viscosity at 100¬įC:¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬† ¬†30-45 ML 1+4
  • Hardness Shore A:¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬† ¬†51 ¬Ī 3
  • Tensile Strength:¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬† 75 kg cm^-3¬†min
  • Elongation @ Break:¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†480 % min
  • State of refining:¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬† Superfine

Data sheets for GRP BRI 75R can be found online, in our data sheet library or on the butyl reclaim product page.

J. Allcock & Sons Ltd. also stock GRP NRM 35R (formerly GR.444 Tyre Reclaim) and GRP NRC 25R (formerly RT-SLAB Tyre Reclaim)

J. Allcock & Sons Ltd. are the official UK distributors for Gujarat Reclaim & Rubber Products Ltd.

For any further technical questions on GRP BRI 75R, please feel free to phone or email, and ask for Norman or Luke.