FI109346B - Roofing materials - Google Patents

Description

, 109346

The cover material

The invention relates to a cover material on the surface of which a friction enhancing agent is applied, wherein the base of the material is a paper-based material.

5

The application of friction material to the surface of a paper or plastic based covering material is known e.g. The friction material in the aforementioned Finnish patent applications 10 is intended to prevent slides of paper and plastic materials such as sacks, a mixture of binder and microscopic small particles. The Swedish announcement concerns 15 plastic stacking sheets of timber piles with anti-slip patches on the upper surface, especially of asphalt mixture.

The papers use materials selected as friction surfaces based on good friction properties and possibly ease of application.

20 For example, the hot melt referred to in Finnish Patent Application 873577 should rapidly solidify into the desired raster pattern.

Covering materials have previously been used for common packaging purposes, such as sacks, with traditional friction materials. The object of the invention is to provide a new covering material which takes into consideration the handling of the material in the formation of the package. To accomplish this purpose, the cover material of the invention is characterized in that: - the material comprises solid particles adhered to the surface of the paper-based material by means of a heat-resistant polymeric binder having a high temperature resistance. at least 160 ° C, preferably at least 180 ° C, wherein the particles and binder form a friction surface on the outer surface of the paper-based material, and 35 on the opposite side to the friction surface of the paper-based material at the same position as the friction surface. · ·. heat sealable mounting surface.

109346 2

Due to the heat resistance of the polymer binder, the cover material can be used in applications where it acts as a heat sealable material to the packaging. Then, on the opposite side of the material is a layer of heat-sealable plastic. A good example of such a cover material 5 is the end roll of a paper roll which covers and protects the end of the paper roll. Such an end tag is heat sealed to the other end press of the roll packing machine, which is in contact with the outer surface of the end tag. Thanks to the heat-resistant friction material, the outer surface of the endplate retains its good frictional properties despite the heat sealing treatment, and due to the increased friction of the rolls, the paper rolls can even be tucked away during transport, which could damage the roll paper.

The invention will now be described in more detail with reference to the accompanying drawing, in which Fig. 1 is a sectional view of the cover material according to the invention, and Fig. 2 shows an embodiment of a cover material according to the invention.

: Fig. 1 shows the cover material with a bearing layer. paper-based material 1, for example kraft paper or cardboard. A friction surface 2 is formed on the outer surface of the paper-based material 1 by applying a friction enhancing agent thereon. This material contains solid particles which are attached to the substrate and to each other by means of a heat-resistant polymeric binder. On the opposite side of the friction surface, material 1 has a heat sealable '·· 30 attachment surface 3, which may consist of any suitable layer of plastic, e.g. polyethylene, fixed to the inner surface of a paper-based V * material.

Figure 2 illustrates a preferred embodiment of a blanket 35 according to the invention. The cover material in this case is an end tag 4, which is particularly used in automated paper roll packaging machines. It is an outer end tag which forms the outermost surface at the end of the paper roll packages. In practice, the end tag 109346 3 is pressed with a heated end press (illustrated by arrow P) against the scribbled wrapping material at the end of the roll of paper R, under which there is possibly an inner end tag to protect the paper in the roll. In this case, the end tag is fastened to the scalloped wrapping material 3 by the heat-sealable attachment surface 3 as the plastic of the attachment surface melts. The heated end press is then in contact with the friction surface 2. The automated paper roll packaging machines in which the aforementioned functions are carried out are known in the art and will not be described further here.

10

The following describes the materials used in friction surface 2 and their application methods.

The friction surface comprises a binder and solid particles which together provide a roughness on the surface such that its coefficient of friction increases relative to the untreated surface.

The binder is a heat-resistant polymer having a temperature resistance of at least 160 ° C, most preferably at least 180 ° C. According to the most preferred 20 alternatives, the temperature resistance is at least 200 ° C.

Temperature resistance means that the polymer does not decompose, melt or soften at a given temperature so that the friction surface is damaged. Here. . : is especially useful in heat sealing with friction. \ subject to high temperature.

.0. · 25 'The polymer binder is preferably a resin. A thermoplastic resin such as * '·; phenol-formaldehyde resin, melamine resin or urea-formaldehyde resin.

* ·· 30 The binder may in principle also be a thermoplastic having a V ': softening point above the above temperature values. Thermoplastic can: ·! in this case be a thin coating on the base paper and its surface ... forming a rough friction surface. For example, straight thermoplastic *; · 'polyester polymers have a softening point well above 200 ° C.

ΛΪ 35

Fine particles such as silica crystals may be used as solid particles.

109346 4

One combination which may be exemplified and without limiting the invention is the melamine resin sold under the tradename Dynomel M-345 as a binder and the silicon oxide sold as Ludox HS 40 as the friction material.

5

The friction enhancing agent may be applied as a friction surface 2 on a paper tray by standard application methods, for example by spray or printing. In practice, only a thin layer is sufficient to increase friction. It is also possible that the friction surface does not consist of a layer covering the entire surface 10, but that the substrate is partially covered, e.g. in certain zones.

Although the invention has been described above with reference mainly to the end-plate, the invention may also be applied to other packaging materials for attachment to packages.

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Claims (4)

109346 A coating material on which a friction-enhancing agent is applied to the surface, wherein the substrate is a paper-based material (1), characterized in that the material comprises solid particles adhered to the surface of the paper-based material (1) by a heat-resistant poly is at least 160 ° C, preferably at least 180 ° C, wherein the particles and binder form on the outside of the paper-based material (1) on the opposite side of the friction surface (2) and the paper-based material (1) on the friction surface (2) ). Cover material according to Claim 1, characterized in that it is an end tag (4) to be attached to the end of a paper roll. 20 Covering material according to claim 1 or 2, characterized in that the polymeric binder is a heat-resistant resin. Covering material according to one of the preceding claims, characterized in that the solid particles are mineral, for example silica crystals. • · ♦ • · · • · * 1 e * · 1 · »» 109346