Note: Descriptions are shown in the official language in which they were submitted.
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The invention relates to a primary pack of
surface-stabilized bandaging materials, which has a
carrier layer and a skin-side contact surface having
contact adhesive areas. The contact surface is protected
prior to use of the bandaging material by a removable
covering layer. An at least one-layer supporting or
backing ~ilm is detachably applied to the carrier layer
surface remote from the skin and is removable from the
applied bandaging material after fulfilling its function
lG of surface stabilizing the carrier layer.
Bandaging materials can be subdivided into two
major groups. The first group consists of those whiGh are
fixed at the point of their application by additional
devices or measures, while the other group involves fixing
by contaot adhesive areas of the actual bandaging
material. In the case of the latter group, the
requirement for thin and flexible carrier layers ensuring
a usa~le moisture resistance and good close adaptability
to the contours of the application point have led in the
~0 past to difficulties during application. Thus, after
removing the covering layer, there can occur, for example,
rolling in of the marginal regions, stic~ing together of
Gontact adhesive areas and creasing, which makes the
bandaging material unusable.
As described in West German OLS 1935916, an
improvement i8 attainable by the use of a so-called
supporting or backing film for surface stabilization
purposes, a more rigid layer than the carrier layer being
so connected thereto that it can be detached following
application. This principle has proved satisfactory in
practice (cf. West German Patent No . 33 44 334 ) .
However, it must be regarded as disadvantageous
that the supporting film is discarded after removal from
the applied bandaging material and consequently its
function is limited ts surface stabilization. The
expenditure involved in providing the material and the
manufacturing measures for this additional element of such
bandaging materials is not inconsiderable.
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An objeGt of the present invention is therefore
to permit çxtension the function of the supporting film so
that the cost/use ratio becomes more favorable.
Accordingly, the invention provides a primary
pack for surface-stabilized banda~ing material, which
comprises a carrier layer, a skin-side contaGt surface
with contao~ adhesive areas, the sontact surface being
protected by a removable covering layer prior to use of
the bandaging material, and an at least one-layer
supporting film detachably applied to the skin-remote
carrier layer surface and whiGh i5 removable from the
applied bandaging material, the supporting film being part
of the pack protecting the bandaging material.
Thus, the problem is solved by a primary pack of
the aforementioned type in which the supporting film is
part of the pack protecting the bandaging material. In
the sense of the invention, the term "primary pack" is
intended to mean a protective layer directly enveloping
the bandaging material. The thus packed individual pieces
can be combined into larger units by secondary and
tertiary packs. The actual protection of the substrate is
mainly ensured by the primary pack.
The invention is usable in all bandaging
materials ffurface-stabilized by supporting films. These
bandaging materials are known and are used, for example,
as wound bandages, f~xing bandages, active substance-
delivering plaster and incision film~ or foils. The
carrier layer of the bandaging material can, for example,
be a textile material, a polymer material or a metal-
containing layer. The supporting film is constituted by
an at least one-layer flat structure of materials
containing polymers, paper or metal. Its surface has at
least the same extension as the carrier layer, but
accordiny to a preferred embodiment of the invention can
pro~ect on one or more sides over the carrier layer edge.
The detachable Gonnection between the supporting film and
the carrier layer can be produced by known methods, such
as producing the carrier layer directly on the supporting
3 ~32~
film, heat sealing, welding, bonding, embossing or forming
electrostatic attraction forces.
The materials for producing the contact adhesive
areas ensuring ~ontact with the skin may be cho~en from
the vast number of possibilities satisfying the standpoint
of phy~iologiGal non-objectionability. A removable
covering layer protects the skin contact surfaGe of the
bandaging material prior to use.
The purpose of a primary pack for such a
bandaging material are known to those skilled in the art.
The hitherto known solution of introducing the bandaging
material as a whole into an envelope surrounding same on
all side~, followed by bonding, sealing, welding or
embo~sing of all the edges has not proven ~ati~factory due
to the type of material which had to be used.
According to the invention, one surface of the
primary pac~ is formed by the supporting film to the top
or bottom surface of which is fixed in the marginal area
the surface structure forming the remainder of the pack.
Fixing can take place, for example, by heat sealing,
welding, embossing or bond~ng. If the supporting film has
the ~ame surface area as the carrier layer, the remaining
pack components are fixed to the top surface of the
~upporting film. If the supporting film pro~ects over the
carrier layer, it may be preferable to provide the fixing
to the bottom of the pro~ecting parts of the supporting
film.
After tearing open the bag-like primary pack,
the supporting film remains on the back of the carrier
layer, which ensures the desired stabilization of the
bandaging ~aterial during application.
The fixing of the remaining flat packing
material to the supporting film and the production of the
detachable connection between the s~pporting film and
carrier layer Gan take place in one step according to the
invention.
The choice of the remaining flat packing
mater1al is determined by the partlcular requirements of
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the band~ging material to be packed. Generally, apart
from materials containing impermeable paper, polymers or
metals, consideration can by given, for example, to those
materials which, on the basis of their structure, can be
S looked upon as textile fabrics. The material choice for
. the supporting film and the remaining pack need not be the
same, but ~ust be matched to the particular re~uirements.
In conventional manner, the pack can be provided with a
tear-open aid, such as tearing threads, desired breaking
lines or the like.
In a particularly preferred embodiment of the
invention, the bandaging material contains at least one
; aGtive substance. It can be a transdermal therapeutic
system, in which an individual pack is unavoidable.
~mbodiments of the invention will now be
described in greater detail and by way of example with
reference to the accompanying drawings, in which:
Figure 1 is a diagrammatic cross-section through
an embodiment of a packed bandaging material; and
Figure 2 is a diagrammatic cross-section through
another embodiment of packed bandaging material.
As shown in Figure 1, a carrier layer 4 formed
from textile material is coated with a contact adhesive
layer 5, which can contain a pharmacologically active
substance. On the skin-facing side a covering layer 6,
is provided which is here made from paper adhesively
finished by siliconization. A supporting film 7 cover~
and projects from the carrier layer 4 on all sides and is
made from a multilayer film material more rigid than the
carrier layer. It is connected to the carrier layer 4 by
heat sealing at points 8 distributed in accordance with a
predetermined pattern. During heat sealing, a sealing
edge 11 is formed with a packing film 10 located below it.
Figure 2 shows another preferred embodiment of
the invention in which the supporting film 7 is of the
same size as the carrier layer. The packing film 10
surrounds the bandaging material and is bonded at the
edges to ~he top of the supporting film 7. In this case
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the contact adhesive layer 5 has no separate covering
layer and instead the packing film 10 assumes the function
o. protective layer. The bandaging material can be
applied directly after opening the pack.
A preferred embodiment of the inventive
~! bandaging material is described hereinafter relative to an
example.
Ex~m~le
Production of a packed bandaging material was
- 10 effected, in which part of the pack functions as a
supporting film.
A 15 x 20 cm2 bandaging material consisting of a
textile carrier layer and an active substance-containing
contact adhesive layer applied thereto was placed
,, 15 centrally between two heat sealable packing material
portions projecting by approximately 1.5 cm on each side.
The packing material was chosen in such a way that the
portion coming into contact with the carrier layer could
; assume the function of the supporting film. Edge sealing
and the detachable connection of the supporting film to
the carrier layer was performed in one or two successive
stages. The finished sealing edge bag was then assembled
- in the usual way.
