JPH03176530A - Separable web type binding material for combining between supporting surface of structure and coating layer to be furnished thereon, which prevents flexible crack from spreading, use of its material, and coating layer structure formed of its material - Google Patents

Abstract

PURPOSE: To prevent a covering material from damaging resulting from crack in a structure by adhering a hard covering material to the structure surface through a web-form coupling material consisting of fiber-based fixing layers provided in the middle with a fiber-form bridge capable of being destroyed. CONSTITUTION: A web-form coupling material 1 having a segregation layer 4 formed with a fiber-form bridge 7 capable of being destroyed is formed between an upper 5 and a lower fiber-based fixing layer 6 in which adhesive is permeated. A hard covering material 3 such as tiles is affixed through the coupling material 1 to a structure 2 consisting of concrete, etc. When crack is generated in the structure 2, it is precluded from being transmitted to the hard covering layer 3. The destructive strength of the segregation layer 4 is adjusted by the number of the fiber-form bridges 7 capable of being destroyed. This prevents the surface covering material 3 from being damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a flexible crack-propagating and separable method for bonding a supporting surface of a structure and a hard coating layer to be provided on the supporting surface. It relates to a web-type bonding material.

In architectural structures where a hard covering layer, such as a decorative layer or a tile surface, is provided on the supporting surface of a building, swimming pool, storage container or bridge, there is a risk that the covering layer will also crack if cracks occur in the supporting surface, for example concrete. There is sex.

To overcome this problem, it is known, for example, to use elasticized resin systems in combination with fibrous webs.

When the support surface cracks, the elasticized resin must be able to bridge the crack, but the crack bridging effect depends on its ability to create adhesion with the support surface. ing. If there is good adhesion,
Crack bridging action will generally be limited to less than i, depending on the thickness of the elastic coating layer. If the adhesion is poor, then only then it is possible to obtain good crack bridging, because if the fibrous web on top of the crack is not adhered to the underlying support surface, then the This is because the web can expand and contract along with the cracks.

However, when using e.g. elasticized polyester resins within these systems, the particular mechanical and chemical properties of the resin constrain it to a particular type of resin that limits its potential use. Due to their high shrinkage of about 5% and low alkali resistance, they cause adhesion problems, resulting in
There is also the problem that the coating can completely detach from the support surface and lose its mechanical strength.

Such known fixings between the support surface and the hard coating layer also give rise to many problems when attempting to remove the fixed coating layer, since the known fixings are difficult to break.

It is an object of the invention to prevent cracks occurring in the supporting surface, e.g. prevents it from spreading within the hard coating layer,
Furthermore, it is an object of the present invention to provide a web-shaped bonding material whose covering layer, which is fixed at one end, can be more or less easily removed.

The bonding material includes at least a lower anchoring layer separated from a stretchable upper anchoring layer by a thin flexible essentially non-adhesive separating layer, while on either side of the separating layer the separating layer The above objects of the invention are achieved through the fact that the upper and lower anchoring layers are bonded together by extending a breakable bridge through them.

A "non-adhered separate layer" in this case is understood to mean a layer that does not adhere to the adhesive used to connect the lower anchoring layer to the support surface and the upper anchoring layer to the covering layer.

The breaking strength between the lower fixed layer, preferably in the form of a fibrous web layer, and the upper fixed layer is conveniently adjusted by the number of breakable bridges between these layers. in this way,
- Once fixed, the coating layer can be easily removed by using a small number of breakable crosslinks, but its removal becomes extremely difficult if a large number of crosslinks are used.

A bridge extending to one side of the separation layer is conveniently formed by a needle piercing the separation layer from the lower anchoring layer to the upper anchoring layer.

By using the flexible crack propagation preventing web-type bonding material of the present invention, the lower anchoring layer, preferably a fibrous web layer, is bonded to the support surface using a synthetic resin, while the other surface Through the fact that a covering layer, such as a tile surface or a covering layer made of synthetic resin and filler particles, is placed on the upper fixed layer, it is possible to firmly bond the support surface to the hard covering layer, Cracks forming in the support surface do not propagate to the coating layer.

The filler particles can be powder particles (eg quartz powder particles) or granular or granular particles (eg gravel particles).

The thickness of the lower fibrous web is adjusted to reduce the consumption of resin for bonding this fibrous web layer with the support layer.
Make it as thin as possible for convenience.

Instead of a fibrous web, the upper fixing layer can also be a woven fabric or a glass mat, resulting in a greater tensile strength and in particular a higher modulus, so that the covering layer itself is under less stress.

Generally, a synthetic resin is selected for bonding the lower fibrous web layer to the support surface and the upper anchoring layer to the hardcover layer, and the resin can be further selected according to the requirements of the use.

Suitable binders are unsaturated polyester resins, polyurethanes, polymethyl methacrylates or epoxy resins,
or a blend of such resins. However, other plastics and cement and/or plastic mortar formulations are also suitable.

For example, when cracks occur in a supporting surface made of concrete, shear stress is generated in the lower fibrous web layer.
As a result, the fibrous web layer cracks and at the same time tensile stress is applied to the upper pinned layer.

Local delamination will occur because a large number of crosslinks will break under the influence of shear stress. As a result, the non-delaminated portion of the upper fixed layer can extend over the delaminated area and thus absorb the crack width in the support surface.

The degree of delamination can be adjusted by appropriately controlling the number of destructible cross-links, the tensile strength of the top pinning layer and the elasticity of the top pinning layer.

In the case of a small number of breakable fibrous crosslinks, delamination will be easily obtained. This delamination may be particularly desirable when using the bonding material of the present invention for removable floor or wall threads.

However, using a higher number of fibrous crosslinks will significantly increase the mechanical strength of the chain yarn.

The present invention also provides a structure on a support surface having a hard coating layer provided on the support surface and a web-type separable bonding material disposed between the support surface and the hard coating layer. A cover layer construction is provided in which a bonding material is present between the cover layer and the support surface, and the bonding material is attached to a stretchable top layer by a thin, flexible, essentially non-adhesive separation layer. comprising at least a lower anchoring layer separated from the anchoring layer, while bonding the lower anchoring layer and the upper anchoring layer together by extending a breakable bridge through the separating layer on either side of the separating layer; , characterized in that the lower and upper fixing layers are bonded to the supporting surface or to the covering layer.

Such coating constructions are particularly suitable for providing coating layers of synthetic resin bonded filler particles as protective and/or decorative layers, for example on floors, roofs and walls of buildings.

Finally, the invention relates to a method for providing a hard coating layer on a supporting surface of a structure using a separable web-type material tightly fitted between fixed layers, the method comprising: When placed on a support surface, the bonding material includes at least a lower anchoring layer separated from a stretchable upper anchoring layer by a thin, flexible, essentially non-adhesive separating layer, while Bonding a lower pinned layer and an upper pinned layer together by extending a breakable bridge through the separation layer on either side, and bonding one of the layers of the pinned layer to the supporting surface using a bonding agent. The other layer is also bonded to the hard coating layer provided thereon using a bonding agent.

The invention will now be described with reference to specific examples of embodiments shown in the drawings.

FIG. 1 shows a separable web-type bonding material 1 for preventing the propagation of flexible cracks, the material comprising:
It comprises a lower anchoring layer in the form of a fibrous web layer 5 and an upper anchoring layer 6, separated from each other by a thin flexible non-porous separating layer 4 in the form of a polyester plastic film. This plastic film does not adhere to thermosetting resins. In this case, the upper fixed layer 6 is also a fibrous web made of plastic fibers.

A breakable fibrous bridge 7 is formed between the lower fibrous web layer 5 and the upper fixed layer 6 by making a hole through a needle, and the fibrous bridge 7 is inserted through a hole 9 in the plastic film. extend.

In order to form breakable fibrous crosslinks, it is convenient to work with 5 to 50 needle punches per lem2.

Although the use of 10 needle punches per Cffi2 results in an easily usable product, ventilation of the lower fibrous web 5 during impregnation with a given synthetic resin can sometimes be difficult.

Using 20 to 50 needle punches per cm2, the lower fibrous web layer 5 is bonded to the support surface 2.
Very good ventilation can be obtained. However, in that case the adhesive strength between the different layers 5 and 6 increases significantly.

The fibrous web layer 5 is conveniently made of plastic fibers with a weight of about 50 g/m2, while the fibrous web layer 6 is made of plastic fibers with a weight of about 50 to 250 g/m2.

Conveniently, the thickness of the fibrous web layer 6 is approximately 21 mm;
On the other hand, the thickness of the fibrous web layer 5 is selected to be as thin as possible. However, these values are given by way of illustration only. FIG. 2 shows the effect that occurs when cracks form in the floor 2 of a building to which the bonding material 1 is fixed by the synthetic resin penetrating into the lower fibrous web layer 5. On the other side, a covering layer 3 of filler particles, such as quartz powder particles bonded by epoxy resin, is bonded to an upper fixed layer 6, which is also a fibrous web.

The number of needle punches forming fibrous crosslinks within the bonding material was 20/Cl112.

When cracks 8 form in the concrete floor 2, the lower fibrous web layer 5 cracks, resulting in fibrous bridges 7 in the vicinity of the developed cracks 8! will also be destroyed.

Fibrous crosslinking 7! When the upper fixed layer 6 is broken, the expandable and contractible upper fixed layer 6
The upper fixed layer 6 is itself stretchable in order to prevent the cracks 8 formed from separating from the lower fibrous web layer 5 through delamination and from propagating into the hard coating layer 3 .

If it is desired to make it possible to easily remove the coating layer 3 of filler particles bonded by epoxy resin after a certain period of time, a fibrous material formed with 5 to IHI, preferably 5 needle punches per l ctn2 can be used. Bonding materials with crosslinks can be used.

[Brief explanation of the drawing]

FIG. 1 shows a cross-sectional view of the web-type bonding material of the present invention,
FIG. 2 also shows a coating construction on the floor of a building and a hard protective coating of filler particles, such as quartz particles, bonded together by an epoxy resin provided on the construction. l...Binding material, 2...Structure, 3...Hard coating layer, 4...Separation layer, 5...Lower fixing Layer, 6... Upper fixed layer, 7... Destructible fibrous crosslink, 8.
...cracks, 9...holes. 1=BE-2+'l=B已・Z

Claims (10)

[Claims] (1) A separable web-type bonding material that prevents permutable crack propagation for bonding a support surface of a structure and a hard coating layer to be provided on the support surface, the bonding comprising: The material includes at least a lower anchoring layer separated from a stretchable upper anchoring layer by a thin, flexible, essentially non-adhesive separating layer, while on either side of the separating layer the separating layer A bonding material characterized in that the lower pinned layer and the upper pinned layer are bonded together by extending a breakable bridge through the bonding material. 2. Bonding material according to claim 1, characterized in that the breaking strength between the lower fixed layer and the stretchable upper fixed layer is adjusted by the number of breakable fibrous bridges between these layers. (3) The lower fixed layer is made of a fibrous web, and the stretchable upper fixed layer is a woven fabric or a fibrous web made of organic or inorganic material. binding material. 4. Bonding material according to any of claims 1 to 3, characterized in that the breakable crosslinks are fibrous crosslinks formed by needle punching from a fibrous web layer through a thin separation layer. (5) a coating layer on the structure support surface having a hard coating layer provided on the structure and a separable web-type bonding material provided between the structure and the hard coating layer; A construct, wherein a bonding material according to any one of claims 1 to 4 is present between the covering layer and the supporting surface, and lower and upper anchoring layers are attached to the supporting surface or the covering layer. A covering layer construction characterized in that it binds. (6) a lower anchoring layer in the form of a fibrous web is coupled to the support surface by an adhesive penetrating into the layer, and preferably a stretchable upper anchoring layer is penetrated into the layer; The covering layer construction according to claim 5, characterized in that it is bonded to the covering layer by an adhesive. (7) A method for providing a hardcover layer on a support surface of a structure using a separable web-type bonding material tightly fitted between the structure and the hardcover layer, comprising: bonding. material is placed on the support surface, the bonding material including at least a lower anchoring layer separated from a stretchable upper anchoring layer by a thin flexible essentially non-adherent separating layer, while the thin separating layer bonding the bottom and top anchoring layers together by extending a breakable bridge through the separation layer on either side of the separation material, and bonding one of the layers of separation material to the support surface using a bonding agent. , while the other layer is also bonded to the hard coating layer provided thereon using a bonding agent. (8) bonding a lower anchoring layer in the form of a fibrous web to the support surface by an adhesive penetrating into the layer and/or a stretchable upper anchoring layer by an adhesive penetrating into the layer; 8. A method according to claim 7, characterized in that it is bonded to a covering layer. (9) The breaking strength between the upper fixed layer and the lower fixed layer is adjusted by the number of breakable crosslinks, preferably fibrous crosslinks formed from the lower fibrous web layer by needle punching. The method according to claim 7 or 8. (10) Any one of claims 7 to 9, characterized in that the lower fixed layer is made of a fibrous web, and the upper fixed layer is a fibrous web or woven fabric made of organic or inorganic material. The method described in.