EP0719365B2 - Process for gluing cut sections of mineral wool panel - Google Patents

Abstract

The process for gluing cut sections of mineral wool panel, especially lamellar mineral wool panel, on a backing using an adhesive mortar, involves first precoating the entire surface of the cut sections with a thin layer of adhesive mortar or aqueous plastic dispersion and, after setting, either applying adhesive mortar in beads or toric form and gluing to the backing or pressing the cut sections into an adhesive layer that was machine-sprayed onto the backing beforehand either in beads and/or in toric form or over the full surface.

Description

The present invention relates to a Process for gluing the cut surfaces of mineral wool slat panels on a surface with an adhesive mortar as well as pretreated suitable for carrying out the method Mineral wool slabs.

DE-A-40 32 769 describes a thermal insulation system, preferably with mineral fiber insulation Panels made of fiber-reinforced insulation material, in which the predominantly the reinforcing fibers essentially runs parallel to each other. As glue become relative expensive e.g. Two-component PUR adhesive or bitumen emulsion adhesive used. Another The disadvantage here is the full-surface gluing, which increases Material and time expenditure means.

DE-A-41 10 454 describes a thermal insulation system, where the mineral fiber insulation is one-sided air permeable with a hydrophilizing solution becomes. In particular, as a hydrophilizing solution Alkali water glass used with and without fillers. The hydrophilization can lead to accumulations of Lead water, which deteriorates the thermal insulation becomes. With hydrophilization and bonding the side edge can create unwanted thermal bridges arise.

DE-A-34 44 815 describes a building wall and ceiling structure intended for exterior facades and its for its manufacture on the Construction site required workload and its Material costs should be less. This will do so achieved that the superstructures as finished parts on the Construction site to be delivered only by painters must be processed.

Mineral wool slat panels have cut surfaces where the Fibers mostly arranged perpendicular to the surface are. This arrangement of the fibers for Surface takes place during transport and processing constant abrasion of the finest on the construction site Fiber fragments, which are a good connection of Prevent glue and surface.

While mineral wool panels with lying fibers or polystyrene plates usually machine-like and / or beaded with adhesive mortar and then glued to the surface, it is so far necessary, the mineral wool slat panels as follows to process:

In the first step, the Adhesive mortar either by hand or mechanically on the Cut surface of the slat plate applied. In one The second step is the mortar using a notched trowel be worked into the plate surface. In A third stage is the pre-treated plates then applied to the wall with staggered joints. In the fourth and final stage, the finishing coat is applied applied after having been armored before is.

Steps 1 and 2 are particularly great time consuming and can be very poor on the Scaffolding to be carried out. When incorporating and Removing the adhesive mortar always results in an excess Mortar that, if possible, is collected in a vessel should be. This is particularly on one Scaffolding so cumbersome that this coating is preferred at ground level. But this means that the freshly coated plate by hand onto the framework must be transported, being as horizontal as possible is to be held so that the mortar does not fall down again.

The object of the invention is the method for gluing the cut surfaces of mineral wool slat panels on a surface with an adhesive mortar simplify and improve, where possible the manual or conventional from other plates machine point and / or bead application of the adhesive mortar should be used.

This task can be done surprisingly easily be solved that the cut surfaces initially over the entire surface with a thin layer of adhesive mortar pre-coated and after binding either with point and / or bulge applied adhesive mortar and with be glued to the surface or in an adhesive layer that are previously mechanically and / or beaded or over the entire surface of the substrate was injected.

The pre-coating can already be done at the factory take place so that the pre-coated already at the construction site Mineral wool slabs are present, which are either point and / or in the manner known per se beaded with adhesive mortar and with the Be glued underground or in an adhesive layer can be indented, which previously mechanically point or sprayed on the surface in the form of a bead or over the entire surface has been.

As with the usual point and / or bulge Application of adhesive mortar mostly only about 50% Coating is sufficient in the invention Process of mortar consumption is greatly reduced. The consumption for the previous thin layer with adhesive mortar significantly lower than that for full-surface gluing necessary amount of mortar with the previously used Method.

Furthermore, there is no collection, recycling or disposing of excess, withdrawn Mortar, so this saves further material leads.

Especially when the thin layer of adhesive mortar applied at the factory this can be done very efficiently by machine, so that further wage and labor costs are saved can be.

In the further embodiment of the invention The pre-coated mineral wool laminate panels are used with the underground thereby glued that the surface mechanically point and / or beaded or fully coated with adhesive mortar becomes. This mechanical application of the adhesive mortar is preferably done using conventional Spray guns in connection with continuous mixers or plastering machines based on the mixing and conveying principle work. In the partial or full surface Adhesive mortar layer will be the pre-coated Mineral wool slats pressed in.

The gluing of the mineral wool laminate panels carried out in this way can save time by two people be made. A first person injects the adhesive mortar punctiform and / or bulge-like or flat on while the second person pre-coated Press plates into this adhesive mortar layer. This creates a permanent, full-surface Connection between the plate and the substrate.

This procedure has the advantage of being larger contiguous Machine surfaces in one piece Adhesive mortar can be applied, which is significant Time saving compared to the adhesive process represents, in which the plates individually coated and have to be glued. At the same time, through this Process partial or full-surface gluing of the lamella plates guaranteed.

The inventive method allows bumps leveling of the subsoil easier and better than with the all-over exercise so far Bonding, especially when pressing mortar on the side is expressed and thus in the panel joint plane reached. There this mortar makes itself a thermal bridge disturbingly noticeable.

Especially with a pre-treatment at the factory the cut surfaces with the thin layer of adhesive mortar can also other qualities of adhesive mortar for use come as the relatively expensive ones used so far Special mixtures. In particular, low-viscosity, well-wetting and quick-setting mortar mixtures come into use. This simplifies it and accelerates the application and setting of the thin layer of mortar, so that intermediate storage times shortened or completely avoided until setting can be.

In a preferred embodiment of the invention Process the cut surfaces before applying the thin layer of adhesive mortar blown dust-free, as this leads to better wetting and adhesion of the Adhesive mortar on the mineral surface. This is also easy to do at the factory, while such additional measures on site are more difficult to carry out, especially if workplace hygiene Considerations taken into account become.

The method according to the invention can be used in principle at Mineral wool slats, due to the manufacturing process a vertical arrangement of the fibers to the surface have and their surfaces both through the hydrophobization the mineral wool as well as by the Dust residue on the surface is not a good connection with adhesive mortar.

Especially with a pre-treatment at the factory the cut surfaces with the thin layer of adhesive mortar Is it possible and quite reasonable, both sides of the mineral wool panels to coat. This has the advantage that the construction site does not have to take care that the right side is glued. Furthermore, both sides pretreated material also light on the outside be glued with other material.

Because the pre-coated mineral wool laminate panels come in larger Quantities prefabricated, transported and separately these mineral wool slats are also available, whose cut surfaces are tied with a thin one Layer of adhesive mortar are precoated, subject of the invention.

The inventive method and the thereby Intermediate product of pre-coated mineral wool laminate panels are closer in the example below explained.

example

A lamellar plate RP-PL, WD according to DIN 18165, Al according to DIN 4102 T.1 and WLG 0.45 according to DIN 4108 was used. The tear resistance> 100 kN / m ² was measured according to DIN 18165. The dimensions of the plate were 1200 x 200 mm. The plate thickness was 100 mm. Other commercial thicknesses of 20 to 240 mm were also used. At least one of the cut surfaces with fibers oriented perpendicular to the surface was coated with a 2 to 4 mm thick layer of a commercially available adhesive mortar (MF 700 from the applicant). After this thin layer had set, this area was spotted and / or beaded with additional adhesive mortar (MF 700) and then glued to the substrate. The adhesion of these boards to the substrate was better and more uniform than with a conventionally bonded mineral wool lamella board, to which adhesive mortar was first applied in the usual way and then worked into the surface structure by hand with a mortar. Various other qualities can also be used as adhesive mortar. The adhesive mortar MF 700 also fulfills the requirements of fire protection.

The adhesive properties have been improved after before applying the thin layer of mortar the cutting surface has been blown dust-free with compressed air was.

It closes depending on the type of adhesive used a dry or temporary storage period until setting of the adhesive. After the coating has hardened the slat plate is stored ready for dispatch.

The operations described above are also Feasible on an assembly line.

Claims (3)

1. Process for bonding the cut faces of lamellar mineral wool panels, to a substrate using an adhesive mortar, characterised in that the cut faces are firstly pre-coated with a thin layer of adhesive mortar on the whole surface thereof, and, after curing, are either provided with adhesive mortar applied in point and/or bead form and bonded to the substrate, or, after curing, are pressed into an adhesive layer which has been sprayed by machine beforehand onto the substrate in point and/or bead form or over the full surface thereof.
2. Process according to claim 1, characterised in that the cut faces are blown free of dust prior to application of the thin layer of adhesive mortar.
3. Lamellar mineral wool panels to be bonded to a substrate using an adhesive mortar, characterised in that their cut faces to be bonded to a substrate using an adhesive mortar are pre-coated with a thin cured layer of adhesive mortar or aqueous plastic dispersion.