CN104989065B - A kind of wood-plastic composite floor and preparation method thereof - Google Patents

Abstract

The invention relates to a wood-plastic composite floor and its manufacturing method. The wood-plastic composite floor manufactured by the method comprises: from top to bottom, a surface coating layer, an upper surface layer, an upper surface modified layer, an intermediate layer, The modified layer of the lower surface plate and the compound composition of the lower surface plate. It can further alleviate the shortage of precious wood. The surface of the carbonized surface board is modified and then compounded with the middle layer, which improves the decoration of the surface of the wood-plastic composite material. After the carbonization treatment, the veneer has good dimensional stability and small color difference. High utilization rate. The 18mm-thick wood-plastic composite floor of the present invention has a bending load of 1240N after boiling (soaking)-freezing-drying treatment, a dipping peeling rate of 0, and a wet friction coefficient of 0.7; it can simultaneously save wood resources and have solid wood flooring Surface effects and other advantages, no harmful substances released, can be widely used indoors and outdoors. Its manufacturing method is scientific and reasonable, and it is easy to shape.

Description

Wood-plastic composite floor and preparation method thereof

technical field

The invention relates to a floor, in particular to a wood-plastic composite floor and a preparation method thereof.

Background technique

With the acceleration of the pace of social life and the improvement of people's living standards, a healthier living environment is required, and wood products are more used in various places, especially as floor covering products - flooring is widely used. But each floor has different advantages and disadvantages. Solid wood flooring has the characteristics of elegance and naturalness, comfortable foot feeling, and good thermal insulation performance, but its dimensional stability is not good enough, and it is easy to arch, warp or deform when the environment is too humid or dry; solid wood composite flooring can better overcome the problems of solid wood flooring. There are indeed disadvantages, but it inevitably uses a large amount of glue in the production process, so there is a problem of releasing harmful substances; compared with solid wood (composite) flooring, laminate flooring has higher wear resistance, but its water resistance is poorer . The above three types of floors are used as the largest floor, and their common disadvantages are poor aging resistance and water resistance. Cannot be used under harsh conditions. Wood-plastic composite material is a board made of wood powder and plastic through a certain process, and it has good water resistance. The carbonized veneer is processed under the condition of controlling 180~220℃ in different media, and the carbonized board has excellent anti-corrosion and dimensional stability. Wood-plastic composite materials have significant economic, ecological and social benefits. However, in long-term use, wood-plastic composite materials will age when exposed to direct sunlight and due to processing methods, formula components and environmental factors. Under continuous stress , will produce creep deformation, and even fracture will affect the service life. The utility model patent CN202969841U is an outdoor floor and CN201343852Y is a wood-plastic composite floor. Carbonized veneer is used as the material of the floor surface, and the veneer and the wood-plastic substrate are glued together by an adhesive. And the substrate is single-sided cladding. These two methods are prone to warping due to the release of harmful substances from the practical adhesive and the unbalanced stress on one side of the substrate.

Contents of the invention

The purpose of the present invention is to overcome the defects of the existing solid wood composite floor using a large amount of natural precious wood and the release of harmful substances, to provide a floor with stable size, no release of harmful substances, good floor texture and quality, and at the same time taking into account the saving of wood resources and solid wood flooring Surface effects and other advantages, can be widely used in wood-plastic composite flooring indoors and outdoors. And provide a scientific and reasonable, easy-to-form wood-plastic composite flooring manufacturing method.

The technical solution adopted to realize the purpose of the present invention is a wood-plastic composite floor, which is characterized in that it includes: from top to bottom, a surface coating layer, an upper surface layer, an upper surface modified layer, an intermediate layer, a lower surface The modified surface layer and the lower surface layer are compositely composed.

A method for manufacturing wood-plastic composite flooring is characterized in that it includes:

1) The structure of the upper surface layer and the lower surface layer is the same, and the veneer of any tree species is planed, rotary cut and sawed. The thickness is 2~8 mm. Time 1~4 hours, carry out carbonization treatment;

2) Paint the upper surface modified layer on the lower surface of the upper surface layer, and paint the lower surface modified layer on the upper surface of the lower surface layer. The upper surface modified layer and the lower surface modified layer have the same structure. Both consist of 40g/m ² of silane coupling agent and 60g/m ² of plastic particles, or 40g/m ² of methylene polyisocyanate and 60g/m ² of plastic particles, through a hot press: temperature 180~190℃, pressure 0.2MPa , the time is 10 minutes, the lower surface of the upper surface layer is compounded with the modified layer of the upper surface layer, and the upper surface of the lower surface layer is compounded with the modified layer of the lower surface layer;

3) The middle layer is a mixture of plastic granules and wood powder, its mass parts are 10 parts of plastic granules, 3~7 parts of wood powder, or recycled materials of wood-plastic composite materials;

4) Place an intermediate layer between the modified layer compounded with the upper surface layer and the modified layer compounded with the lower surface layer, using a hot press at a temperature of 185°C, a pressure of 2.5MPa, and a time of 25 minutes to press into one body at a time;

5) On the basis of step 4), use tongue and groove equipment to make grooves on one side of the middle layer and make tenons on the other side of the middle layer;

6) On the basis of step 5), apply a surface finish layer on the upper surface of the upper surface layer. The surface finish layer is paraffin wax or floor finish paint with a temperature resistance of 95~340°C to make a finished product.

The plastic particles are at least one of polypropylene, polyethylene, polyvinyl chloride and high-density polyethylene.

The wood powder has a mesh number of 20-240 mesh and a moisture content of 2%-10%.

The floor finishing paint is polyurethane paint, unsaturated polyester paint, nitro paint or UV curing paint.

In the wood-plastic composite flooring of the present invention, the surface of the carbonized surface board is modified and compounded with the middle layer, which improves the decorativeness of the surface of the wood-plastic composite material, and the veneer after carbonization treatment has good dimensional stability and small color difference. The wood utilization rate is high. The 18mm thick wood-plastic composite floor of the present invention has a bending load of 1240N after boiling (dipping)-freezing-drying treatment, a dipping peeling rate of 0, and a wet friction coefficient of 0.7; it can simultaneously save wood resources and have solid wood flooring Surface effects and other advantages, no harmful substances released, can be widely used indoors and outdoors. Its manufacturing method is scientific and reasonable, and it is easy to shape.

Description of drawings

Fig. 1 is a schematic diagram of the structure of wood-plastic composite flooring of the present invention.

In the figure: 1-surface coating layer; 2-upper surface layer; 3-surface modifier layer; 4-intermediate layer; 5-lower surface modifier layer; 6-lower surface layer; 7-concave groove; 8-tenons.

detailed description

Below in conjunction with accompanying drawing and embodiment, the present invention will be further described

Referring to Fig. 1, a kind of wood-plastic composite floor of the present invention comprises: from top to bottom successively by surface coating layer 1, upper surface layer 2, upper surface modification layer 3, middle layer 4, lower surface modification The layer 5 and the lower surface layer 6 are compounded.

A kind of manufacturing method of wood-plastic composite floor of the present invention, comprises content to have:

1) The structure of the upper surface layer and the lower surface layer is the same, and the veneer of any tree species is planed, rotary cut and sawed. The thickness is 2~8 mm. Time 1~4 hours, carry out carbonization treatment;

2) Paint the upper surface modified layer on the lower surface of the upper surface layer, and paint the lower surface modified layer on the upper surface of the lower surface layer. The upper surface modified layer and the lower surface modified layer have the same structure. Both consist of 40g/m ² of silane coupling agent and 60g/m ² of plastic particles, or 40g/m ² of methylene polyisocyanate and 60g/m ² of plastic particles, through a hot press: temperature 180~190℃, pressure 0.2MPa , the time is 10 minutes, the lower surface of the upper surface layer is compounded with the modified layer of the upper surface layer, and the upper surface of the lower surface layer is compounded with the modified layer of the lower surface layer;

3) The middle layer is a mixture of plastic granules and wood powder, its mass parts are 10 parts of plastic granules, 3~7 parts of wood powder, or recycled materials of wood-plastic composite materials;

4) Place an intermediate layer between the modified layer compounded with the upper surface layer and the modified layer compounded with the lower surface layer, using a hot press at a temperature of 185°C, a pressure of 2.5MPa, and a time of 25 minutes to press into one body at a time;

5) On the basis of step 4), use tongue and groove equipment to make grooves on one side of the middle layer and make tenons on the other side of the middle layer;

6) On the basis of step 5), apply a surface finish layer on the upper surface of the upper surface layer. The surface finish layer is paraffin wax or floor finish paint with a temperature resistance of 95~340°C to make a finished product.

The plastic particles are at least one of polypropylene, polyethylene, polyvinyl chloride and high-density polyethylene.

The wood powder has a mesh number of 20-240 mesh and a moisture content of 2%-10%.

The floor finishing paint is polyurethane paint, unsaturated polyester paint, nitro paint or ultraviolet curing paint.

The chemical raw materials used in the present invention are all commercially available products.

Taking the 18mm thick wood-plastic composite floor of the present invention as an example, after boiling (dipping)-freezing-drying treatment, the bending load reaches 1240N, the dipping peeling rate is 0, and the wet friction coefficient is 0.7; it can simultaneously save wood resources and It has the advantages of solid wood floor surface effect, no harmful substance release, and can be widely used indoors and outdoors. Its manufacturing method is scientific and reasonable, and it is easy to shape.

The embodiments of the present invention are limited examples and are not exhaustive, and they still belong to the protection scope of the claims of the present invention without simple copying and improvement through creative labor.

Claims (5)

1. a kind of manufacture method of wood-plastic composite floor, it is characterized in that, it include in have：

1）Upper table flaggy, following table layer structure are identical, and using the veneer of any seeds of slicing, rotary-cut and sawing, its thickness is 2 ~ 8 millimeters, in 180 ~ 220 DEG C of temperature, humidity 100%, carries out charing process at 1 ~ 4 hour retention time；

2）Dash board modified layer is covered with paint, lacquer, colour wash, etc. in the lower surface of upper table flaggy, dash board is modified under being covered with paint, lacquer, colour wash, etc. on the upper surface of following table flaggy Layer, upper dash board modified layer, lower dash board modified layer structure are identical, by silane coupler 40g/m²With plastic grain 60g/m², or Methylene polyisocyanates 40g/m²With plastic grain 60g/m², by hot press：180 ~ 190 DEG C of temperature, pressure 0.2MPa, when Between 10 minutes, make the lower surface of upper table flaggy and upper dash board modified layer be compound, the upper surface of following table flaggy and lower dash board modified layer It is compound；

3）Intermediate layer is the mixture of plastic grain and wood powder, and its mass parts is 10 parts of plastic grain, 3 ~ 7 parts of wood powder, or is wood The reclaimed materials of plastic composite materials；

4）Intermediate layer is placed between the modified layer that the modified layer and following table flaggy that upper table flaggy is combined are combined, using hot press, 185 DEG C of temperature, pressure 2.5MPa, 25 minutes time, one step press is integral；

5）In step 4）Basis on, using tongue-and-groove equipment, groove is outputed in the side in intermediate layer, in the opposite side in intermediate layer Output tenon；

6）In step 5）Basis on, in the upper surface coating surface coatings of upper table flaggy, top finishing layer is heatproof 95 Paint is covered with paint, lacquer, colour wash, etc. on ~ 340 DEG C of paraffin or floor, is made finished product.

2. the manufacture method of a kind of wood-plastic composite floor according to claim 1, it is characterized in that, the plastic grain is poly- At least one of propylene, polyethylene, polyvinyl chloride and high density polyethylene (HDPE).

3. the manufacture method of a kind of wood-plastic composite floor according to claim 1, it is characterized in that, the mesh number of the wood powder is 20 ~ 240 mesh, moisture content is 2% ~ 10%.

4. the manufacture method of a kind of wood-plastic composite floor according to claim 1, it is characterized in that, the floor is covered with paint, lacquer, colour wash, etc. paint and is Polyurethane paint, unsaturated polyester varnish, nitrate paint or ultraviolet-cured paint.

5. the manufacture method of a kind of wood-plastic composite floor according to claim 1, it is characterized in that, manufactured wood plastics composite Floor includes：From top to bottom successively by top finishing layer, upper table flaggy, upper dash board modified layer, intermediate layer, lower dash board modified layer and The compound composition of following table flaggy.