KR20000003550U - Formwork panels - Google Patents

Abstract

The present invention relates to a formwork panel installed to cast concrete, wherein the surface layer of the panel in which the polypropylene and the filler is kneaded and the special fiber layer made of natural or artificial fibers on the back of the sheet and the special The back side of the fiber layer is composed of a support layer with plywood, etc., a special fiber layer made of natural or artificial fibers, and a sheet layer kneaded with polypropylene and fillers.The sheet is easily separated from the concrete wall and has a high wear resistance. It does not cause damage to the surface even after several times of use, and it is excellent in water resistance and alkali resistance, so there is no deformation of material caused by moisture, and it is made of synthetic resin and wood instead of iron material, so it is easy to process for the construction of the site. It works.

Description

Formwork panels

The present invention relates to a formwork panel installed to cast concrete, and more specifically, to prevent cracking and cracking of the formwork panel during curing of concrete walls, to increase bending resistance and heat resistance, and to facilitate workability.

Conventional panel for wood has a concrete surface roughened by the pattern of the wood, so that it is necessary to perform separate finishing work, and the panel is easily corroded and damaged due to construction problems and moisture, etc. This problem is short, and there are various problems such as time-consuming maintenance.

In addition, the synthetic resin panel has the advantage of being formed lightly and smoothly when constructing the concrete wall. However, when the load is concentrated due to the severe shrinkage and weak strength due to the characteristics of the synthetic resin, there is a problem in that the construction defect of the concrete wall occurs.

And the steel panel is heavy, expensive and can be used only as a standard product, and there was a problem in construction.

The present invention has been devised to solve the various problems as described above, and the surface of the concrete wall is formed smoothly, and at the same time, it is easy to detach, and the panel is easily damaged by moisture, preventing the shortened life, and the strength is improved. The present invention provides a formwork panel that is weak and prevents warpage when load is concentrated, increases durability, heat resistance, dimensional stability, and is excellent in workability.

According to the present invention for achieving the above object, the surface layer kneaded with polypropylene and the filler and the backing layer of the special fiber layer made of natural or artificial fibers and the backing layer of the support layer and the support layer attached to the back surface of the special fiber layer The present invention provides a formwork panel comprising a special fiber layer made of natural or artificial fibers and a sheet layer kneaded with polypropylene and a filler.

1 is a cross-sectional view of the panel of the present invention

Figure 2 is a cross-sectional view showing an embodiment of the present invention

Figure 3 is a cross-sectional view showing another embodiment of the present invention

◆ Explanation of symbols for main parts of drawing ◆

10: Panel 1, 1 ', 1 ": Surface protection film

3: surface layer 3 ': sheet layer

5, 5 ': special fiber layer 6: support layer

Hereinafter, with reference to the accompanying drawings showing an embodiment of the present invention will be described in detail the configuration and operation.

In the panel 10 cured to cure a concrete wall, the surface layer 3 kneaded with polypropylene and a special fiber layer 5 made of natural fibers and artificial fibers on the back of the surface layer 3 and the On the back side of the special fiber layer 5, a support layer 6 having plywood or the like attached to the back side of the support layer 6 and a sheet layer in which a special fiber layer 5 'made of natural or artificial fibers and a polypropylene and a filler are kneaded ( 3 ').

The surface of the panel 10 is blended with 20 parts by weight of other additives in an equal ratio of 40 parts by weight of polypropylene and 40 parts by weight of a filler (for example, wood powder, gemstone powder, etc.) to have high quality properties due to temperature changes and impact. It consists of an extruded surface layer (3), the surface protective film (1.1 '. 1 ") is bonded to the surface of the surface layer 3 to protect the surface layer (3).

The special fiber layer 5 is preferably used as a non-woven fabric, woven fabric, cotton, hemp, wool, glass fiber, nylon, etc. made of special fibers to prevent cracking and cracking due to external impact.

The support layer 6 is made of wood to support the stiffness and overweight due to side pressure during concrete curing, the wood is preferably plywood, hardboard, particleboard and the like.

In addition to the transfer paper or various printing on the surface of the surface protective film (1, 1 ', 1 "), as well as embossing of the uneven pattern shape to give a beautiful appearance, and to slide the panel 10 at the construction site, etc. You can add protection.

The method of attaching each layer made in this way is briefly described as follows.

First, the surface layer 3 is rolled by the calender method, and the surface protective film 1, 1 ', 1 "and the special fiber (nonwoven fabric, etc.) 5 are bonded by thermal pressure. A part of the special fiber is impregnated into the surface of the surface layer 3 to increase the adhesion between the back surface of the surface layer 3 and the support layer 6 and to alleviate the impact from the outside. As a result, a part of the special fiber layer 5 'is partially impregnated into the surface of the sheet layer 3' to compress the upper layer and the lower layer around the support layer 6 using a press.

As described above, the present invention is easy to detach the panel from the concrete wall when the concrete curing is completed, and a sheet layer having excellent abrasion resistance is attached, and do not cause cracks, cracks, damages, etc. of the surface even after several times of use, natural fiber And there is no deformation of the material due to moisture by attaching a special fiber layer, such as artificial fibers, excellent water resistance and alkali resistance, made of synthetic resin and wood, not iron material, there are various effects that the construction and processing of the site is easy.

Claims (4)

In the formwork panel used to cure the concrete wall, the panel includes a surface layer (3) composed of a sheet of polypropylene and a mixture of filler and a surface protective film (1,1 ') attached to the upper portion of the surface layer (3), 1 ″) and the backing layer 3 on the back side of the special fiber layer 5 made of natural fibers and artificial fibers and the backing layer of the special fiber layer 5 and a support layer composed of plywood, hard board, particle board, etc. A panel for formwork, characterized in that it comprises a special fiber layer (5 ') made of natural fibers and artificial fibers on the back side of the sheet) and a sheet layer (3') on which the polypropylene and filler are kneaded on the back surface of the special fiber layer (5 '). 10. The formwork panel according to claim 1, wherein the panel consists only of a surface protective film (1, 1 ', 1 "), a surface layer (3), a special fiber layer (5) and a support layer (6). The formwork panel according to claim 1, wherein the surface protective film (1,1 ', 1 ") is made of a transfer paper or a print surface protective film (1,1', 1"). The formwork panel according to claim 1, wherein the surface of the surface protective films (1, 1 ', 1 ") has an uneven shape.