Bremen/Düsseldorf, April 24, 2008

New PVC-free compound for lug-type twist caps

TPE to replace PVC

 

Bremen/Düsseldorf, 2008-04-24 - Commission Directive 2007/19/EC, the fourth
amendment to “Plastics Directive” 2002/72/EC comes into effect shortly and no
longer allows the use of certain phthalates as plasticisers in PVC-based closure
seals that come into contact with food. One reason for this is the widening of the
scope of the Plastics Directive to cover metal twist-off caps. The retailers, fillers
and manufacturers of metal twist-off caps are desperately looking for alternative
sealants.

At this year’s interpack (24-30 April 2008 in Düsseldorf) ACTEGA DS GmbH is
presenting a sealing compound with a formulation free both of plasticisers and
PVC. In anticipation of the need of food producers for reliable product-specific
closures complying with the new legislation, the closure-sealant specialist has
developed a solution based on thermoplastic elastomers.

With its new product, PROVALIN® 1241, ACTEGA DS is offering a sealing
compound that can be used with a broad range of lug-type twist-off caps (from 23
to 82 mm diameter). The new product’s key features are:

  • constituents that conform to current legislation and that due to come into
    force shortly (Plastics Directive)
  • the new material is aimed at ensuring that migration limits are also adhered
    to at the end of the shelf-life of oily foods
  • pasteurisable
  • optimised opening torques of the closures
  • reliable vacuum
  • good resealability.

 

The new development from ACTEGA DS is based on the desire of closure
manufacturers, fillers and brand owners for compounds or sealants that are free of
PVC. The aim was to develop an equivalent material with the necessary properties
of good processability, pasteurisability and reliability with respect to highly
demanding contents. PROVALIN® 1241 should also ensure compliance with valid
migration limits for products with longer shelf-lives, for example oily foods (such as
antipasti). The need for a reliable vacuum until the closure is first opened and userfriendly
resealability were additional challenges faced during the development of
the new material. In a series of specific tests PROVALIN® 1241 has proven that it
is possible to achieve all of the required sealant properties by entirely using
thermoplastic elastomers.

The introduction of the directive amending the Plastics Directive and the
requirements relating to packaging and packaging materials in direct contact with
food, with defined migration limits, is expected to lead to numerous changes in
long-established types of packaging. ACTEGA DS has anticipated the future
legislative framework with various developments and will be presenting a package
of innovative solutions at interpack.

ACTEGA DS is taking the opportunity offered by its participation at interpack, to
discuss with clients and prospective clients further developments relating to
compounds and sealants, their processing and fields of application, as well as
specific application details.

 

About ACTEGA
The Division ACTEGA Coatings & Sealants is a member of ALTANA group. ACTEGA develops and produces specialty coatings and sealants for the packaging and the graphic arts industry. These products not only give materials such as paper, paper board, plastic and metal an attractive appearance, but also give the material surface clearly defined chemical and physical properties.

The main customer for the products developed, manufactured and sold by ACTEGA is the packaging industry. ACTEGA is the market leader in overprint varnishes and sealing compounds for closures and glass containers, in the case of water-based sealants for cans and coatings for flexible packaging ACTEGA is the technological leader.

The coatings guarantee not only that the packaging will look appealing, but also that the contents remain fresh for longer; those products make sure that soft surfaces become scratch resistant, metal does not rust and paper becomes non-sensitive for water.

The sealing products create a seal between two contact surfaces, such as glass on metal (bottle closures) or metal on metal (can ends); they ensure that the filling good (e.g. beer) remains inside the packaging and any contaminants (e.g. Oxygen, which causes beer to go stale) remain outside.