Prevulcanised Natural Rubber Latex Concentrates

FPP’s prevulcanised natural rubber latex is manufactured by a special process which provides concentrates particularly suitable for dipping applications. No vulcanisation is required, and hence there is normally no need to consider vulcanising recipes or the time and temperature of cure. Other important qualities are:

  • High latex stability and long storage life
  • Exceptionally transparent films
  • High tensile strength
  • Excellent resistance to ageing
Natural Latex & Pre-vulcanised

Dried Film Properties

Transparency

Transparency

FPP prevulcanised latex grades contain a low proportion of non-rubbers. Excess zinc oxide and vulcanising ingredients are reduced to a minimum. These factors, coupled with the simple drying treatment required, ensure the production of highly transparent articles.

Water Resistance

Water Resistance

The water resistance of prevulcanised latex films is higher than that of most compounded latex films because of the low non-rubber content. Leaching of the prevulcanised latex films, as with all latex films, is critical in providing optimum water resistance.

Latex Properties

No Vulcanising Treatment Required

Prevulcanised latexes simply need drying. No vulcanisation is necessary.

Exceptional Product Stability

Zinc oxide must be used with caution when compounding an unvulcanised ammonia­ stabilised latex concentrate, as the formation of zinc-ammine ions has a destabilising effect which results in a gradual increase in viscosity followed by eventual coagulation. FPP prevulcanised latex is carefully compounded so that excess zinc oxide is reduced to a minimum; thus, the viscosity and stability changes very little upon prolonged storage, always provided exposure to temperature extremes is avoided.


The addition of chemicals such as sulphur, accelerators, etc. to natural latex starts the process of prevulcanisatior in the fluid state. This process is time-related and on storage of normally compounded natural latex, vulcanisation can proceed to a level whereby the latex compound becomes non-processible due to too high a state of cure. The prevulcanisation process is very carefully controlled during manufacture to provide grades of consistent cure and modulus.

Flame Retardant Polyurethane Foam Impregnant Application

Grades

  • ML 200 Low ammonia, medium modulus.
  • ML 250 ‘Fast pick-up’ low ammonia, medium modulus.
  • ML 446 ‘High’ viscosity, low ammonia, and medium modulus.
  • ML 354 Thickener of prevulcanised natural rubber latex.

Applications

  Balloons
  Household Gloves
  Latex sheeting
  Moulds for garden ornament manufacture
  Moulds for chest figures

We also supply compositions based on prevulcanised latex which can be used as peelable, air-drying protective coatings for a range of applications. These can be tailored to end user’s specific requirements.

Unvulcanised Natural Rubber
Latex Concentrates

We also supply Low Ammonia Natural Rubber Latex (LA-TZ), Ultra Low Protein Low Ammonia Natural Rubber Latex and High Ammonia Natural Rubber Latex.

News & Events

Latest from the blog

New Products
20th February 2023

New Products

During the middle of last year and following the closure of ILC/ Jacques Products, Formulated Polymer Products acquired two new employees from ILC/Jacques Products. Since then we have been integrating Darren and Steve into the team here in Ramsbottom. They...

Read More
Raindrops on a latex compound
11th June 2021

8 Applications Where Latex Compounds Are Used

Latex is a generic term for a dispersion/emulsion of a polymer in water. A wide range of polymers are available as latices. Latex can be combined with other chemicals e.g. flame retardants. The properties of latex make it a versatile raw material for multiple...

Read More
An example of an application for latex compounds
11th June 2021

6 Versatile Applications of Latex Compounds

Latex is a commonly used term for a dispersion/emulsion of a polymer in water. A wide range of polymers are available as latices. Latex can be combined with other chemicals e.g. flame retardants. The properties of latex make it a versatile raw material for...

Read More

Talk to our team

Contact us