Paper wallcovering with a plastic coating and wallpaper with plastic coating

 

(57) Abstract:

Paper wallcovering with a plastic coating and Wallpaper with a plastic covering for increased efficiency in the use of consist of at least two fibrous layers, the compositions of which are different. 2 c. and 8 C.p. f-crystals, 1 tab., 4 Il.

The invention relates to paper-based Wallpaper, which is covered with plastic, and the base paper made from fibrous material. The invention relates also to the wall with a plastic covering, consisting of paper made from a fibrous material, and a plastic coating on a paper basis.

Wallpaper is usually composed of a paper base with the rear surface intended for fastening to a wall, and cover the top of the paper base, and this coating serves as a good basis for printing or stencil pattern. Suitable coatings for printing include known coating that contain latex binder and a pigment, which are represented, for example, by the applicant in European patent N 0543793.

As coatings for Wallpaper also use plastic, because plastic can be used to get on her powiatu, if the Wallpaper used in wet areas. Popular source of polymeric material for coatings of this kind are plastic dispersion with a content of a synthetic polymer, such as dispersions based on polyvinyl chloride, and which can be applied on the surface by smearing for a homogeneous impermeable plastic surface.

The disadvantage of the above type of Wallpaper with a plastic coating is that the plastic coating material, the weight of which is usually not less than 80 g/m2, forms a homogeneous impermeable layer on the surface of the paper base, thus causing difficulties for the further use of this product. In particular, when used as Wallpaper this combination represented by the cellulose fibers and plastic, was a problem because the plastic does not correspond to the changes that occur in paper-based, in particular, when the reverse side of the paper to moisten the paste, which is necessary when using Wallpaper. Selection of paper from the point of view of their quality in relation to this problem have been ineffective. This drawback is mainly due to the orientation of wolokolie as a consequence of wetting the fibers of the paper.

The finished strips of Wallpaper with a plastic covering, subject to extension, the longitudinal direction of the paper base coincides with the direction of the machine, which is evident in the strong twisting of the side edges.

The technical result of the present invention is to substantially eliminate the above disadvantages and offer a new paper base, which is suitable for use as base material for wall-paper with a plastic coating, can coating, such as polyvinyl chloride.

The technical result is reached by using paper for wall-paper with a plastic coating based on polyvinyl chloride and extracted from the fibrous material, which consists of not less than two fibrous layers.

While the compositions of the fibers in the fibrous layers are different.

The proportion of cellulose in the surface layer is larger than the substrate layers forming the rest of the paper base; and the proportion of wood pulp and/or waste more in the surface than in the surface layer.

The proportion of the cellulose more in the underlying layer than in the adjacent layer, such as an intermediate layer or the surface layer.

2.

In addition, the technical result is reached by using a Wallpaper with a plastic covering, consisting of paper made from a fibrous material and a plastic coating applied in the form of a dispersion on top of the paper base and forming a homogeneous impermeable plastic surface, despite the fact that the paper base shall consist of at least two fibrous layers.

This Wallpaper contain all the claimed characteristics of the paper base.

Through the use of two-layer or multi-layer paper as the paper base of the Wallpaper, you can significantly reduce or even eliminate the disadvantages that occur when using the paper base, represented by a single layer of fibers. Moreover, two-layer or multilayer paper web may have a layer structure in which a surface layer, made of a fiber of the appropriate grade, and the underlying layer is also made of a fiber of the corresponding sort.

At the same time the technical result of the present invention is also the view of the Wallpaper with a plastic coating that does not have the above defects, which have their paper-based consists of not less than two layers of Wallpaper. The behavior of two-layer or multilayer paper more uniformly in mutually perpendicular directions while moisturizing.

Previously a two-layer base paper used as base paper for wall-paper, on which was applied direct printing, that is, without the plastic cover. As these Wallpapers with direct print related issues were not evident to the same extent as Wallpapers with a plastic covering, the favorable quality two-ply paper was not previously noticed. Two-layer paper is also used as a paper basis to improve the appearance of the Wallpaper, on which a plastic coating was applied by extrusion in accordance with the German utility model/sample N 860017, the specific weight of the coating was quite large, ranging from 180 to 230 g/m2. A relatively thin plastic coating that is applied by extrusion, of the order of a maximum of 30 g/m2that can cause problems as a result of shrinkage during cooling.

In Fig. 1 shows a paper wallcovering with a plastic coating; Fig. 2 - wall-paper with a plastic coating; Fig. 3 - the second version of the paper base; Fig. 4 - the third version of the paper base.

Phi is fighting with a plastic coating. The paper base consists of two layers of fibers 1a and 1b, both are composed of cellulose fibers, which are used for the production of paper or cardboard; description of variants of these materials follows. The paper base 1 - uniform paper, which, however, has a distinct layered structure and the boundary between layers and which is formed according to known techniques from two-ply fabric produced by the paper or Board machine. Layer 1a forms a surface to which is applied a coating of Wallpaper, and the layer 1b forms a spreading layer, a rear surface which attach to a wall or other structure, which is covered with Wallpaper in a known manner, using pasta. In a known manner paste on the rear surface can be applied in advance in the production of Wallpaper, consequently, the Wallpaper only need to moisten before attaching or Wallpaper can spread the paste only in the process of attachment.

Fig. 2 shows a cross section of the finished Wallpaper, and thus, these Wallpapers consist of the paper base 1 and a deposited plastic cover 2, and thus provide an impervious coating on paper. The main structures of liviniere. Under the polyvinyl chloride or the basis of polyvinyl chloride include copolymers of polyvinyl chloride. The dashed line 3 indicates the possibility of pre-applying the paste to the back surface. Floor 2, applied to the paper base in the form of a dispersion with heat treatment, forms an impermeable plastic layer with a homogeneous structure in the direction of the plane of the paper substrate and in the direction perpendicular to it.

The plastic layer 2 can be further processed by known processing methods Wallpaper.

The paper base 1 shown in Fig. 1 and 2, consist of two layers of equal thickness. In Fig. 3 shows the performance of the paper base, which consists of three layers of different thickness, consequently, different weight. Thus, the weight of the layer 1a, forming the coated surface is less than the weight of the underlying layer 1b, forming the rear surface. The mixture of fibers of the surface layer 1a and possible additives, which are used in connection with the production of paper, can be accurately selected to match the properties of the surface and, therefore, this layer can be made of more expensive fiber, then the fiber that is used on maxivate water when using Wallpaper and it is possible that it will cause pre-paste.

For the surface layer 1a can be used, for example, cellulose with a surface hardness along the length of the order of 1.5 m/s when using poloveckogo oil. For the underlying layer 1b can use wood pulp with an appropriate surface hardness of the order of 0.5 m/s If one of the layers or both layers are represented by mixtures of fibers, it is possible to choose a specific ratio of the elements of the mixtures so that the proportion of fibers with higher indicators of the strength of the surface prevailed in the surface layer than in the underlying.

Examples of possible correlations of the items of mixtures include, but are not limited to, the following:

Paper basis:

- the surface layer of the cellulose, 20 g/m2;

- underlying layer of wood pulp, the combination of wood pulp/waste and cellulose, 70 g/m2.

Paper base:

- the surface layer of pulp, a combination of wood pulp/marriage with the couch roll and cellulose, 30 g/m2;

- underlying layer of wood pulp, the combination of wood pulp/waste and pulp, 60 g/m2.

In the latter case, the combination of elements is 2">

Taking into account the above-mentioned mechanical properties of the surface, the most favorable fiber structure is such a structure, in which the proportion of the cellulose more in the surface layer than in the underlying, respectively, the percentage of wood pulp and/or waste in the underlying layer is larger than in the surface layer. However, the choice of fibers or mixtures of fibers may be accepted and other criteria, and may occur even though the need to ensure greater strength of the surface layer of the fiber, which is limited to the rear surface of the paper; in this case, the composition of the layers may be opposite to that indicated above.

Fig. 4 shows a variant according to which the paper base has a surface layer 1a and the underlying layer 1b, and between them there is an intermediate layer 1c, that is, a three-layer product. In addition, in this case, the layer 1a can be more pulp than in the rest of the paper, presents an intermediate layer 1c and the underlying layer 1c, i.e. the substrate. When selecting fibers for the intermediate layer and the underlying layer is necessary to consider that the intermediate layer 1c acts as the base layer and the underlying layer 1b is in contact with water and toothpaste. So CLASS="ptx2">

Similarly, the ratio of the weight of the fiber layer can vary. The weight of the surface layer 1a, forming the surface to be coated with a plastic coating, may be less than the weight of the substrate constituting the rest of the paper (the underlying layer 1b two-layer product or underlying layer 1b and the intermediate layer 1c three-layer product); in particular, if the fiber or mixture of fibers used in the surface layer 1A, they will be more expensive because of their special properties. In particular, in a two-layer paper of the specified size and weight may be the same or weight of the underlying layer 1b may be less than the weight of the surface layer 1a.

The above paper base was tested for tensile strength, elongation and elongation in the wet state, and the coated paper was tested by twisting; the results of these tests were compared with the results which were obtained when the test paper consisting of one layer and of the same composition and weight. The comparison results are given in the table.

Received a low coefficient of tensile strength indicates a good stability of size/dimensional stability, which correlates with low elongation in the wet state. Heartnote molding) provide the best stability paper converting, that is, for example, when coated. Dispersion molding (there are minor variations in weight) is low, which indicates the uniformity of the technical material properties of paper and correlates with good resistance and low susceptibility to damage (see table).

The General advantage of two-layer and multi-layer paper regardless of the factors shaping is higher rigidity as a consequence of the structure of the layers.

Total specific weight of the paper base, of course, can be different and be different from the value of 90 g/m2the above examples. The total share of the various layers may be different in the range from 80 to 180 g/m2preferably from 80 to 120 g/m2.

Base paper can be produced on the paperboard machines with conventional methods by developing a two-layer or multilayer paper web with a combination of two or more separate flows of raw material.

Practically this can be done, for example, by using the head for producing a multilayer paper to mix the flows of raw materials with low consistency, but preferably two or more relatively RA is t, the layers of fibers derived from the flows of raw materials, connected with each other prior to the pressing section when the dry matter content is less than 25%, preferably a content of less than 20%, which, as is known, provides a good formation, there is a small deviation molding, and more easily provides a low coefficient of fiber orientations at higher relative water content.

The result is the paper base is converted further to known machines for coating, where it is covered with an impermeable plastic layer, typically a layer of polyvinyl chloride having a specific gravity of not less than 80 g/m2usually about 100 g/m2. So, get ready to print Wallpaper, shown in Fig. 2.

1. The paper base for wall-paper with a plastic coating based on polyvinyl chloride and extracted from the fibrous material, wherein the paper base shall consist of at least two fibrous layers.

2. The paper base under item 1, characterized in that the compositions of the fibers in the fibrous layers are different.

3. Paper based on p. 2, characterized in that the proportion of cellulose in the surface layer is larger than the spoon, than in the surface layer.

4. Paper based on p. 2, characterized in that the proportion of cellulose more in the underlying layer than in the adjacent layer, such as an intermediate layer or the surface layer.

5. The paper base according to any one of the preceding paragraphs, characterized in that its specific gravity is in the range 80 - 180 g/m2, preferably 80 to 120 g/m2.

6. Wallpaper with a plastic covering, consisting of paper made from a fibrous material and a plastic coating applied in the form of a dispersion on top of the paper base and forming a homogeneous impermeable plastic surface, wherein the paper base shall consist of at least two fibrous layers.

7. The Wallpaper on p. 6, characterized in that the compositions of the fibers of the fibrous layers of the paper base have differences.

8. The Wallpaper on p. 7, characterized in that the proportion of cellulose in the surface layer directly beneath the plastic coating is greater than the substrate layers forming the rest of the paper base, and the proportion of wood pulp and/or waste more substrate layers than in the surface layer.

9. The Wallpaper on p. 7, characterized in that the proportion of cellulose is th.

10. Wallpaper according to any one of paragraphs.6 to 8, characterized in that the weight of the paper base is in the range 80 - 180 g/m2, preferably 80 to 120 g/m2.

 

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3 cl, 2 tbl

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