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Participant

Join Date: Apr 2009
Posts: 2

Identification of Rubber Sheets

04/20/2009 8:30 AM

Hello,

We have a problem in our store and we are nor able of identifying the different types of rubber sheets (NBR, EPDM, Chlroprene, ...) we have.

Can anyone indicate me a simple method for the identification of the rubber without doing complicate chemical tests?

Thanks in advance

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
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#1

Re: Identification of rubber sheets

04/20/2009 10:08 AM
  • keep the delivered material together with its deivery packaging and order number so that the material can be identified from its purchase order details.
  • label the material upon arrival with the material details as stated on the purchase order.
  • Identify storage areas and dedicate a single area to a single material. Maintain rigorously the segregation within areas.
  • do physical tests. There will be a standardised hardness technique for determining the amount of 'bounce' in the rubber. Compare the tested sample to the manufacturer's standard.
  • is there a colour difference that could readily identify the materials?
  • is there a texture difference that could readily identify the materials?
  • is there a smell difference that could readily identify the materials?
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Anonymous Poster
#5
In reply to #1

Re: Identification of rubber sheets

04/21/2009 12:37 AM

can you give us your contact address , we want buy different types of rubber sheets

thanks

kalaiselt@yahoo.co.in

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Guru

Join Date: Oct 2008
Posts: 42293
Good Answers: 1663
#2

Re: Identification of rubber sheets

04/20/2009 10:19 AM

There is no simple method a layman can use to identify these materials.

Hardness, color, texture may help. What does your specification say? How did you buy them?

Follow the advice of PW.

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Participant

Join Date: Apr 2009
Posts: 2
#3
In reply to #2

Re: Identification of rubber sheets

04/20/2009 12:26 PM

We bought with european standards. In particular for our last project french standards (NF L 17-120 and 121 for NBR, NF L 17-131 for clhroprene and NF T 47-402 for EPDM).

Hardness is not a help because we have sevaral types of hardness in all the types of rubbers.

Color is not a help because all are black.

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Power-User

Join Date: Feb 2009
Location: TORONTO, CANADA
Posts: 134
#6
In reply to #3

Re: Identification of rubber sheets

04/22/2009 1:05 AM

Guest has replied correctly. a burn test of a small sliver of the material should tell which is which. Some times a float test will tell one material from the other also. Floating in different fluids ie, alcohol, water, oil may be necc. good luck.

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Guru

Join Date: Oct 2008
Posts: 42293
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#7
In reply to #6

Re: Identification of rubber sheets

04/22/2009 8:56 AM

As I stated in my original reply, "there is no simple method a layman can use to identify these materials."

Flame tests are only as good as the person performing the test and people with 20 years in the trade don't always guess right when burning the plastic. There may be distinguishing characteristics that an expert would recognize by burning the different materials, but not a layman.

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Anonymous Poster
#4

Re: Identification of Rubber Sheets

04/20/2009 10:42 PM

Well, worse come to worse you might have to burn the one pcs each of the rubber sheet (which can be quite danger). Observe the smell, the smoke colour and even the fire itself.

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Active Contributor

Join Date: Jul 2010
Location: India
Posts: 12
#8

Re: Identification of Rubber Sheets

08/29/2012 6:48 PM

Well correct!

There is no way to distinguish between different type of Rubber compound (Chloroprene, NBR, EPDM, Silicone, Nitrile, NR).

Burn test can also be concluded by a person having decades of experience in Rubber Industry.

The only way is lab testing.

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Users who posted comments:

Anonymous Poster (2); lyn (2); MIKE L. (1); PMVM-74 (1); PWSlack (1); Rubber&Polymer (1)

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