KR100576493B1 - Plastic door for indoor - Google Patents

Abstract

The present invention relates to plastic doors and more particularly to doors for indoor languages used indoors of buildings.

The present invention does not emit harmful chemicals such as environmentally harmful substances such as pohoaldehyde (HCHO) or volatile organic compounds (VOCs) in the indoor plastic door, and provides a door that is structurally strong and excellent soundproofing and noise blocking ability In the indoor plastic door, which has a central filler layer such as honeycomb or foam layer on the inside, and surrounds the outer edge with a square reinforcement border, and attaches the front and rear panels on both sides of the front and rear panels, It is composed of olefin-based PP composite resin plate material, and the rectangular frame surrounding the honeycomb is composed of double resin bar and aggregate wood, and the adhesive for attaching the front plate and the back plate is made of foamed urethane adhesive of a certain thickness (about 1 to 3 mm). It enhances sound insulation and noise protection, and uses a paper finish impregnated with resin on the front and back surfaces. The present invention relates to an environment-friendly indoor plastic door having high adhesion and particularly hot melt type adhesive, which has excellent adhesion and does not emit harmful compounds.

Description

Plastic door for indoor

1 is an exploded perspective view showing the inside of the present invention.

2 is a cross-sectional view of the present invention.

The present invention relates to a plastic door, and more particularly to a plastic door for indoor languages used in the interior of the building.

In general, indoor doors made of solid wood, plywood, MDF, etc., which have been widely used in the past, have a short lifespan and are deformed due to long-term use. It is limited and can be seen to have problems such as an increase in manufacturing cost.

In order to solve this problem, recently, doors made of plastic have been proposed, and various types of plastic doors are being produced and marketed.

Usually, plastic doors are made by extrusion molding synthetic resins such as PVC or ABS to form a square frame supporting the doors. Also, the front door and the back plate are made of a plastic plate made of a plate by a mold using the above materials. In the middle of the rear panel, that is, the inside of the door is filled with synthetic resin foam or filled with a honeycomb-like paper reinforcement (honey comb) to produce a door board, the door by cutting the border by the size of the door Will be the final production.

In addition, in the conventional plastic door, in the composite form of composite wood or wood, instead of attaching the rim reinforcement core and the honeycomb interlayer to the front plate and back plate made of plastic plate, the front plate and the back plate material of the MDF board ( It can be seen that the interior doorboard is formed by attaching a processing cloth such as MDF (Medium Density Fiber board) or plywood and attaching a finishing material such as PVC film or veneer to the surface.

Such plastic doors have advantages of durability and dimensional stability compared to wooden doors and excellent moisture resistance.However, the doors formed of MDF or plywood with the front panel and the back panel have high water absorption rate, so durability is poor. Can be seen.

In addition, in conventional plastic doors or doors made of processed plywood such as MDF, a large amount of environmental pollutants such as formaldehyde (HCHO) and volatile organic compounds (VOCs) are released to reduce air quality in the living environment. It can be seen that this provides the cause of the sick house.

The sick house is also called a sick house syndrome, and chemicals emitted from building materials contaminate indoor air, thereby indicating a phenomenon of headache, asthma, atopic dermatitis, and the like.

The present invention has been developed to provide a plastic door that is made of an environmentally friendly material that minimizes the release of environmentally harmful substances found in conventional plastic doors or doors using processed wood, and has a rigid structure and excellent appearance. will be.

The first object of the present invention is a food house using an environmentally friendly material that does not contain environmentally harmful substances such as formaldehyde (HCHO), volatile organic compounds (VOCs), such as indoor air quality degradation of the living environment constituting the plastic door ( sick house) It provides a door to block the occurrence factor, and the second purpose is structurally solid, there is no distortion, such as torsion, and the appearance of natural natural wood or other elegant texture to the exterior, the friendly and luxurious door The third purpose is to improve the sound insulation and sound insulation, so that the noise inside the door or the outside of the door is not transmitted well and to provide a door to obtain a comfortable indoor environment.

In order to meet the above object, the plastic plate, MDF plate, plywood, etc., which have been used as a front plate and a back plate of a conventional plastic door, use an adhesive such as urea resin, and formaldehyde (HCHO) among plastic components. B, in view of the use of materials that emit volatile organic compounds (VOCs), the present invention is a plastic that is known to contain no extremely harmful chemicals such as formaldehyde, volatile organic compounds (VOCs) The material is used.

In particular, the present invention is the main material of the door is made of PP resin (Polypropylene), an olefin resin, which is an eco-friendly material containing almost no environmentally harmful substances, and made of wood powder added to the front plate and the back of the door It consists of a plate, and the inside of the door has paper honeycomb as a filling material, and the reinforcing core material for reinforcing the edge of the door forms a double frame made of synthetic resin bars and aggregated wood to build a strong frame. By attaching an eco-friendly finish foil formed by impregnating acrylic resin on the surface of the back plate with a hotmelt type adhesive, the finish surface paper does not easily fall off due to external force with excellent adhesion between the front and back plates. It solves the shortcomings of the prior art, and if the pattern of the finishing paper is a grain of wood, the texture of natural wood and other patterns When the front plate and the back plate are attached to the honeycomb, which is an intermediate layer, the adhesive used has excellent adhesive strength instead of low-cost adhesives that generate environmentally harmful substances, and has a uniform thickness (foaming layer). By using, to provide a door with excellent soundproofing and soundproofing performance, look at the details thereof as follows.

In the indoor plastic door having an inner central filler layer such as a honey comb or a foam layer on the inner side, the outer edge is surrounded by a square reinforcement border, and a rectangular front plate and a rear plate are attached to both sides thereof. The front plate 11 and the rear plate 12 are made of a composite plate mixed with wood powder and polypropylene resin (PP resin), which is an olefin resin, and the square reinforcement frame surrounding the edge of the honeycomb 13 inside It is composed of synthetic resin bars 14 and aggregated wood 15, and the front plate 11 and the rear plate 12 attached to the front and rear of the honeycomb 13 and the square reinforcement frame have a foaming thickness of 1 to 3 mm. It is attached to the urethane board adhesive 17, and the finishing surface 19 attached to the surface of the front plate 11 and the back plate 12 is a hot melt type impregnated with acrylic resin to the flame-retardant paper (hotmelt type) ), The adhesive is thermally compressed.

In the above, the honeycomb 13 as an intermediate filler can impregnate the phenolic resin, which does not generate formaldehyde (HCHO) or volatile organic compounds (VOCs), to strengthen the honeycomb 13 as an intermediate layer in water resistance and strength. In addition, the composite plate used as the front plate 11 and the rear plate 12 is a wood and plastic composite formed by mixing wood flour with an olefin-based polypropylene resin (PP resin) that does not emit toxic chemicals such as formaldehyde or volatile organic compounds. It is to use composite plate of material.

The present invention having such a structure will be described in more detail and at the same time, as described below.

As mentioned above, the present invention uses environmentally friendly materials that do not generate formaldehyde or volatile organic compounds (VOCs) as main materials, and improves high strength and sound insulation.

The present invention in the indoor door is integrally attached to the front plate 11 and the rear plate 12 by the honeycomb 13 and the adhesive, the border between the front plate 11 and the rear plate 12 The frame has a square reinforcement border, but the square reinforcement border is composed of a laminated structure (14) and a double structure of laminated wood (14) on the outside of the laminated resin bar (14) and a piece of wood on the inside to form a square reinforcement border, To provide the door frame.

Inside this two-ply rectangular reinforcement border will have a honeycomb 13 intermediate layer of paper material, consisting of a honeycomb 13 and the front plate 11 and the back plate 12 on the rectangular reinforcement border adhesive ( 17) is attached to form a door.

In the present invention, the front plate 11 and the rear plate 12 is a mixture of 30 to 50% by weight of wood powder and PP resin 50 to 70% by weight, and 5 to 10% by weight of other additives The resin was heated to the temperature at which the resin was dissolved, and the mixture was extruded into a sheet having a thickness of 2-3 mm to be used.

The PP resin can produce products at a lower price when collected and manufactured from recycled recycled materials.

As such, the composite board formed by adding wood powder to the PP resin does not emit environmentally harmful substances that cause a sick house caused by formaldehyde and volatile organic compounds (VOCs), thereby helping to provide a pleasant indoor living environment. do.

As the other additives, a crosslinking agent for promoting the mixing of the wood powder and the PP resin, a combustion retardant for preventing the wood powder from burning when the resin is heated and dissolved, and an antioxidant of the resin may be used.

Indoor doors are structurally robust and should not be easily deformed, they should have a beautiful appearance, and they should have the function of noise blocking due to their excellent sound insulation and sound insulation.

In order to meet this, the paper honeycomb (13) used as an internal filling material can obtain a solid structure when impregnated with phenolic resin, and the square reinforcement frame surrounding the edge of the honeycomb (13) is made of synthetic resin bar (14) and The double square reinforcement frame structure of the aggregated wood 15, to provide a frame structure of a solid door.

In addition, when the front panel 11 and the rear panel 12 are attached to the honeycomb 13 and the reinforcing edges of the honeycomb outer periphery with a foamed urethane adhesive having a thickness of about 1 to 3 mm, the soundproofing and noise blocking properties are excellent. It is to create a pleasant indoor environment by preventing the noise generated from or the noise generated from the living room from being transferred to another room.

The interior door is solid and at the same time beautiful and beautiful appearance is very important.

Plastic doors, which have been used as plastic sheeting materials, can be seen that the surface of the glass does not have a high-quality texture due to the shiny surface of the PVC material. In the case of using MDF or plywood as the front panel, it is necessary to use veneer or color paper. It can be seen that the pattern or shape by attaching, but the conventional surface paper does not have excellent adhesion, it can be easily peeled off, especially in a humid place, the surface paper is easily lost due to swelling by moisture. have.

In order to solve this problem, in the present invention, a paper surface having a wood grain pattern or other colors and patterns is attached to the front plate or the rear plate, and color change such as color or pattern for a long time using a finishing surface paper impregnated with acrylic resin. Deformation of the surface is not generated, and the composite plate constituting the acrylic resin and the front plate 11 and the back plate 12 is attached with a strong bonding force by the same physical properties so that the attached surface finish does not easily fall off due to moisture or external force. It has a strong adhesion.

Such indoor plastic doors have excellent processability, so when they are assembled into door frames, they are assembled in the same way as ordinary doors. Will be provided.

In addition, the door of the present invention is rigid and there is no deformation and always maintains the same form as the first, and does not cause deformation or expansion, such as shrinkage or expansion due to heat or moisture, thereby providing a door that always fits into the door frame.

The indoor plastic door according to the present invention is composed of a composite plate made by adding wood powder to a PP resin, which is a plastic material, but is an environmentally friendly plastic material, compared to a conventional plastic door, which can be seen from a conventional door by using a front plate and a rear plate of the door. It prevents or suppresses the release of formaldehyde or volatile organic compounds, thereby providing a door without deterioration of air quality in the living environment, and adopts a double reinforcement structure made of synthetic resin bar and aggregated wood to reinforce the door. Reinforced honeycomb by impregnating phenolic resin into honeycomb, which is the internal filling material of door, and sound-absorbing effect and noise-cutting effect by using foamed urethane adhesive with a certain thickness of adhesive to attach front and back plates To increase the weight and achieve a light and sturdy interior door. It is a very useful invention.

Claims (5)

In the indoor plastic door having an inner central filler layer such as a honey comb or a foam layer on the inner side, the outer edge is surrounded by a square reinforcement border, and a rectangular front plate and a rear plate are attached to both sides thereof. The front plate 11 and the rear plate 12 are made of a composite plate mixed with wood powder and an olefin-based polypropylene resin (PP resin), and the square reinforcement frame surrounding the edge of the honeycomb 13 inside It is composed of a synthetic resin bar 14 and the aggregate wood (15), and the front plate 11 and the back plate 12 attached to the front and rear of the honeycomb 13 and the square reinforcement border is foamed urethane having a thickness of 1 ~ 3㎜ It is attached to the plate adhesive (17), and attaches the finish surface 19 on the front plate 11 and the back plate 12 surface, the finish surface 19 is flameproofed and hotmelt type Indoors, characterized in that the adhesive to heat by pressing with Plastic door. The indoor plastic door according to claim 1, wherein the paper honeycomb (13) is impregnated with a phenolic resin. The surface finishing paper 19 attached to the front plate 11 or the back plate 12 surface is impregnated with acrylic resin on a patterned paper, and using a hot melt adhesive on the back surface Indoor plastic door, characterized in that. 2. The indoor use according to claim 1, wherein a foamed urethane adhesive (17) having a thickness of 1 to 3 mm is used to attach the front plate (11) and the back plate (12) to the honeycomb (13) as an intermediate layer. Plastic door. The composite plate constituting the front plate 11 and the back plate 12 is composed of 30 to 50% by weight of wood powder, 50 to 70% by weight of PP resin, and 5 to 10% by weight of additives. Indoor plastic doors.

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