KR100554839B1 - Melamine sheet layered flooring having grooves on bottom thereof - Google Patents

Abstract

The present invention relates to a melamine sheet laminated flooring material having a groove on the back side of the product, in the flooring material comprising a top sheet layer, an adhesive layer, a base layer and a bottom sheet layer made of a transparent protective layer, a shape layer and a core layer from above. It relates to a melamine sheet laminate flooring material, characterized in that the groove is formed on the back surface of the lower sheet layer of 0.5 to 1.0 mm, the depth of 5 to 30% of the total thickness of the flooring material.

When constructing a flooring material having a groove formed on the back side according to the present invention, the construction adhesive penetrates into the groove to bond the product with the floor such as mortar and concrete even more strongly, even after the floor construction due to climate change such as temperature and humidity. It is possible to further stabilize the basic physical properties, such as dimensional stability, bending stability of the melamine sheet laminate flooring material that can be changed.

Groove, Backside, Flooring, Adhesive

Description

Melamine sheet layered flooring having grooves on bottom

1 is a cross-sectional view of a conventional melamine sheet laminated flooring material,

Figure 2 is a cross-sectional view of the melamine sheet laminated flooring material having a bottom groove on the back of the product according to the present invention,

3a to 3c is a rear view of the melamine sheet laminated flooring having a bottom groove in the cross direction according to an embodiment of the present invention,

Figures 4a to 4c is a rear view of the melamine sheet laminated flooring having a bottom groove in the longitudinal direction (Machine Direction) according to another embodiment of the present invention,

5a to 5c is a rear view of the melamine sheet laminated flooring material having a bottom groove at the same time in the transverse direction and the longitudinal direction according to another embodiment of the present invention,

6a to 6d are side views showing various forms of a bottom groove portion according to the present invention.

Explanation of symbols on the main parts of the drawings

10: base layer 11: lower sheet layer

12: top sheet layer 13: transparent protective layer

14: shaped layer 15: core layer

16: adhesive layer 30: bottom groove

40: transverse groove 50: longitudinal groove

The present invention relates to a melamine sheet laminated flooring having a groove on the back side of the product.

Melamine sheet laminated flooring material is well represented in the manufacturing method and structure of the Republic of Korea Patent Nos. 258,600 and 295,341. A representative structure is a top sheet layer 12 composed of a transparent protective layer 13, a shape layer 14, a core layer 15, and an adhesive layer 16 on top of the vinyl chloride base layer 10, as shown in FIG. 1. ) And a lower sheet layer 11 at the bottom. And the product back surface is flat without irregularities, or there is embossing within 0.05-0.20 mm by the embossing roll or the embossing plate at the time of processing.

Melamine sheet laminated vinyl chloride flooring material is hardened by impregnating melamine-formaldehyde resin on the overlay paper in which aluminum oxide with Mohs hardness 9 is dispersed evenly. It is excellent and gives the sound absorption, impact resistance, water resistance and cushioning properties due to the use of the vinyl chloride base layer 10 to improve the walking feeling, the seating property is enhanced during construction, and the bottom sheet layer 11 which is a balance layer is a product of It is the ideal flooring material to balance the warping phenomenon as much as possible and to show excellent adhesion with construction adhesive in waterproof function.

However, the transparent protective layer 13 and the shaping layer 14 impregnated the melamine-formaldehyde resin into the paper, and the core layer 15 impregnated the phenol-formaldehyde resin into the paper, thus the properties of the paper and the resin for impregnation. Because of its hydrophilic nature, it exhibits very sensitive behavior to moisture, and since the vinyl chloride base layer 10 is a thermoplastic resin, its dimensions change with temperature.

As a result, melamine sheet laminated vinyl chloride floor covering has different physical behaviors of shrinkage and expansion according to climate and environmental changes such as temperature and humidity, so that the bending stability and dimensional stability of vinyl chloride floor covering and ondol floorboard are different. It is more unstable than plywood floor or reinforced floor.

Accordingly, the melamine sheet laminated vinyl chloride flooring material has a problem that curling or warping may occur even if it is applied to the floor with a suitable adhesive, so that the floor and the product such as concrete and mortar can be more perfectly adhered to the back of the product. It is necessary to complement the form.

The present invention is to solve the above problems, by forming a groove on the back of the product of the melamine sheet laminated flooring material, the construction adhesive penetrates into the groove on the back of the product to further strongly adhere the floor and the product such as mortar, concrete and the temperature and It aims to further stabilize basic physical properties such as dimensional stability and flexural stability of melamine sheet laminated flooring materials, which can change after flooring due to climate change such as humidity.

In order to achieve the above object, the present invention is characterized by forming a product backside grooves of various shapes and shapes on the back of the product so that the construction adhesive easily penetrates the back of the product after manufacturing the melamine sheet laminated flooring material.

However, the deeper and wider the groove portion in the product, the wider and the wider the groove portion is not necessarily better. This is because, when a melamine sheet laminated flooring material having a bottom groove is installed on the floor, when a certain load is applied, the shape and shape of the bottom groove are transferred to the surface of the product and visible to the naked eye.

For the above reason, in the present invention, the shape and shape of the bottom groove portion are not transferred to the surface of the product even when a load of 1 kg / cm 2 greater than the force applied by the adult who weighs 100 kg is applied while maximizing adhesion to the floor. Depth and width were defined.

The present invention relates to a melamine sheet laminate flooring material having a bottom groove on the back side of the product, from above to a flooring material comprising a top sheet layer, a base layer and a bottom sheet layer consisting of a transparent protective layer, a shape layer, a core layer and an adhesive layer. In the lower sheet layer, a groove having a width of 0.5 to 1.0 mm and a depth of 5 to 30% of the total thickness of the flooring material is formed.

The depth of the groove is better in terms of strengthening the adhesion between the product and the bottom, but if too deep, it is preferable to form about 5 to 30% of the thickness of the product because the bottom groove is transferred and exposed to the naked eye. In consideration of the surface transfer of the bottom groove portion, the width is preferably formed to be 0.5 to 1.0 mm.

The grooves may be formed regularly or irregularly at regular intervals, for example 1 to 10 cm. In addition, the groove portion may be formed in one direction, for example, the longitudinal direction orthogonal to the machining direction or the longitudinal direction, preferably the groove portion is formed in both the transverse direction and longitudinal direction in the bottom and Can maximize the adhesive strength of. The shape of the groove is not particularly limited, and may be, for example, triangular, chevron, square or trapezoidal in end shape.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

Figure 2 is a cross-sectional view of the melamine sheet laminated vinyl chloride flooring material having a bottom groove on the back surface of the product according to the present invention, the flooring material of the present invention is a transparent protective layer 13, the top of the base layer 10, the shape An upper sheet layer 12 composed of a layer 14, a core layer 15, and an adhesive layer 16, and a lower sheet layer 11 below the lower sheet layer, and a groove 30 is formed on the bottom of the lower sheet layer. Thus, the construction adhesive penetrates the groove to strengthen the adhesion between the product and the floor.

The transparent protective layer 13 is hardened by impregnating a melamine-formaldehyde resin on an overlay paper in which highly wear-resistant particles such as aluminum oxide are dispersed evenly, and are excellent in wear resistance, scratch resistance, pollution resistance, and chemical resistance. The shape layer 14 may be one printed with paper and impregnated with melamine resin as a printing layer. The core layer 15 is a layer made of a sheet dried by impregnating phenolic resin with thermal stability on paper. The adhesive layer 16 is a layer made of an adhesive such as a room temperature curable urethane resin. The adhesive layer 16 is applied to a predetermined amount on the base layer 10 to form an adhesive layer 16.

The base layer 10 is a vinyl chloride sheet layer to provide noise absorption, impact resistance, water resistance, and cushioning properties to improve walking comfort, and to improve installation stability during construction. The bottom sheet layer 11, which is a balance layer, is a sheet of glass paper, nonwoven fabric or soft vinyl chloride impregnated with a modified phenolic resin, phenolic resin, acrylic resin, melamine resin or impregnated with vinyl chloride resin. In addition, it balances the warpage of the product as much as possible and exhibits excellent adhesion to the construction adhesive due to its waterproof function.

Looking at the manufacturing process of the flooring according to the present invention, by laminating the respective layers and performing a press crimping process to integrally compress by heating or press the upper sheet layer 12 on the base layer 10 After pressing at room temperature and compressing the lower sheet layer 11 at room temperature using a predetermined adhesive, the lower sheet layer 11 is integrated, and finally, the bottom sheet layer 11 is subjected to groove processing in a predetermined pattern.

3, 4 and 5 is a rear view of the melamine sheet laminated flooring having a groove portion 30 according to an embodiment of the present invention, respectively.

As the melamine sheet laminated flooring material is printed on the shape layer 14, the appearance of wood, stone, and solid color can be cut freely and cut into parquet as a product that can replace the ondol floor of the wooden exterior. It can be cut into square or rectangular shapes.

In addition, the manufacturing direction has a direction in the machine direction and the cross direction (Cross Direction) orthogonal to the machining direction (Machine Direction).

3 is a rear view of the melamine sheet laminated flooring material having the bottom groove portion 40 in the transverse direction, the transverse groove portion 40 may be formed regularly or irregularly at intervals of 1 to 10 cm.

Figure 3a is a product of the parquet form, Figure 3b is a product of the square form, Figure 3c shows a product of the rectangular form.

Figure 4 is a rear view of the melamine sheet laminated flooring material having a bottom groove 50 in the longitudinal direction, likewise the longitudinal groove 50 may be formed regularly or irregularly at intervals of 1 to 10 cm.

Figure 4a is a product of the parquet form, Figure 4b is a product of the square form, Figure 4c shows a product of the rectangular form.

5 is a rear view of the melamine sheet laminated flooring material having the bottom grooves 40 and 50 simultaneously in the transverse direction and the longitudinal direction, wherein the transverse grooves 40 and the longitudinal grooves 50 are each 1 to 10 cm apart. Can be formed regularly or irregularly. The reason for having the bottom groove in both directions is to maximize the adhesion between the product and the floor, although the cost is higher when forming the bottom groove.

FIG. 5A shows a parquet shaped product, FIG. 5B shows a square shaped product, and FIG. 5C shows a rectangular shaped product.

Figure 6 is a side view showing various forms of the bottom groove portion according to the present invention. The bottom groove portion may be formed in various shapes such as a triangle like FIG. 6A, a chevron like FIG. 6B, a rectangle like FIG. 6C, and a trapezoid like FIG. 6D.

The depth of the bottom groove is better in terms of strengthening the adhesive force between the product and the floor, but if it is too deep, the bottom groove is transferred and exposed to the naked eye after construction, so that it is preferably about 5 to 30% of the thickness of the product. For example, in a 3 mm thick product, it is preferable to form grooves about 0.15 to 0.90 mm deep. And the width of the bottom groove portion is generally adopted because of the ease of manufacturing the groove forming saw blade and the tool to form a width of 0.5 to 2.5 mm, in the present invention to form a width of the groove portion 0.5 to 1.0 mm in consideration of the surface transfer of the groove portion It is preferable.

Example

To prepare a melamine sheet laminated vinyl chloride flooring material as disclosed in the Republic of Korea Patent No. 258,600, the thickness of the top sheet layer 12 is 0.60 to 0.70 mm, the thickness of the vinyl chloride base layer 10 is 2.20 to 2.30 mm, The lower sheet layer 11 had a thickness of 0.10 to 0.20 mm to prepare a product having a total thickness of 3.0 mm.

In addition, grooves having a rectangular shape were formed on the rear surface of the lower sheet layer 11 at intervals of 30 mm in width and depth as shown in Table 1 in both the transverse and longitudinal directions. The adhesive on the mortar floor and the product is W-200 chemical bond, an acrylic water-based adhesive manufactured by Hwaseong Co., Ltd., and was applied by applying an amount of 0.7 kg / m 2 to the floor.

Table 1 shows the depth and width of the grooves where the bottom grooves are not transferred to the surface of the product when the melamine sheet laminated vinyl chloride flooring material applied to the mortar floor is pressed 100,000 times while pressing with a force of 1 kg / ㎠. It is shown.

Transfer to groove surface of groove according to depth and width of bottom groove Width of groove part (mm) 1.0 1.5 2.0 Depth of groove (mm) 0.2 0.5 1.0 0.2 0.5 1.0 0.2 0.5 1.0 Surface transfer no no no no no being no being being

As shown in Table 1, when the width of the groove was 1.0 mm, the depth of the groove was not transferred to 1.0 mm, but when the width of the groove was 1.5 mm, when the depth of the groove was 1.0 mm, the groove was transferred and observed visually. When the width of the groove was 2.0 mm, the groove was transferred and observed with the naked eye even if the depth of the groove was only 0.5 mm.

Table 2 shows the adhesive force with the bottom of the melamine sheet laminated vinyl chloride flooring material having a bottom groove. At this time, the products and adhesives used are the same as in Table 1, and in order to measure the peel strength, 3 mm-thick bamite manufactured by Byucksan Co., Ltd. was used as the bottom of the product.

Comparison of adhesive strength with or without floor groove Elapsed time＼ Peel strength Without bottom groove (kg / 2.5 cm) If there is a bottom groove (kg / 2.5 cm) 1 day later 4.0 4.8 2 days later 6.5 7.7 3 days later 6.8 8.6 4 days later 8.2 10.8

As shown in Table 2, when the product is installed with a product with a bottom groove, the adhesive strength with the bottom is 20% or more stronger than when it is not installed.

The present invention is to form a bottom groove in a variety of shapes and forms so that when the melamine sheet laminated flooring material is installed on the floor with a suitable adhesive, the construction adhesive can be more perfectly adhered to the floor, thereby excellent surface properties and easy construction The possibility of commercializing melamine sheet laminate flooring materials was further increased.

Claims (5)

In the flooring material comprising a top sheet layer, a base layer and a bottom sheet layer consisting of a transparent protective layer, a shape layer, a core layer and an adhesive layer from above, On the rear surface of the lower sheet layer is formed a groove portion having a width of 0.5 to 1.0 mm, a depth of 5 to 30% of the total thickness of the floor decorative material, Melamine sheet laminate flooring material, characterized in that the groove is formed regularly or irregularly at intervals of 1 to 10 cm. delete 2. The melamine sheet laminate flooring material according to claim 1, wherein the groove portion is formed in the transverse direction or the longitudinal direction. 2. The melamine sheet laminate flooring material according to claim 1, wherein the groove portion is formed in both the transverse and longitudinal directions. The melamine sheet laminate flooring material according to claim 1, wherein an end shape of the groove portion is triangular, chevron, square or trapezoidal.

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