CN110206262A - A kind of surface layer is the compound wooden floor and preparation method of PP film - Google Patents

Abstract

The present invention proposes a composite wooden floor whose surface layer is a PP film and a preparation method thereof. The preparation method includes step 101, preparation of a composite solid wood substrate layer; step 102, molding of the substrate layer I; and, step 103, preparation of a thickness of A PP film of 0.1-0.5mm, the surface of the PP film is a decorative ink layer and a hard coat layer; step 104, the PP film is cut according to the specification of the substrate layer I coating, cut into small rolls, and the width of the PP film is slightly larger than that of the substrate The width of the material layer I; step 105, the required PP film is placed on the coating equipment, and the back of the PP film is evenly scraped and coated with PUR hot melt adhesive, and immediately attached to the base material layer I and utilizes a pressure wheel on the surface Rolling, so that the PP film and the base material layer I are combined together; step 106, the coated slab is maintained, so that the PUR hot melt adhesive is fully reacted and solidified, and the composite wooden floor with the surface layer of the PP film is obtained. The floor is light, comfortable and extremely environmentally friendly.

Description

A kind of composite wooden floor whose surface layer is PP film and its preparation method

technical field

The invention relates to the field of wooden floors, in particular to a composite wooden floor whose surface layer is a PP film and a preparation method thereof.

Background technique

Laminate flooring is a common ground decoration material. Usually, laminate flooring is impregnated with thermosetting amino resin with one or more layers of special paper, and paved on the surface of particleboard, high-density fiberboard and other wood-based panels. Layer, front plus wear-resistant layer, after hot pressing, molding.

In order to ensure that the laminate floor has good stability and physical and chemical properties, the wear-resistant layer on the surface of the floor has a large number of aluminum oxide particles, and the density of the particleboard or fiberboard base material is relatively high, resulting in the hard laminate floor, which cannot give people a comfortable feeling. Foot feeling. A large amount of adhesive is also used in the production process of laminate flooring, and the large amount of formaldehyde released will cause harm to producers and users.

The utility model patent with the publication number CN207775141U discloses a PP film decorative panel, which includes a substrate layer, a PP film, and an adhesive, wherein the PP film is cut and placed on the top surface of the substrate layer, and the PP film is passed through an electric After halo back coating treatment, PUR glue is applied, and the two layers of PP film and substrate layer are rolled and combined by PUR glue and coating equipment, and the PP film is a PP film with a decorative surface on the surface. In this patent, the PP film is bonded to the high-density fiberboard base material. The board material is hard and is not suitable for paving the ground. It is only used for furniture and cabinet decoration, and the preparation process of the fiberboard requires a large amount of adhesive, which is not environmentally friendly.

Contents of the invention

The object of the present invention is to provide a composite wooden floor with a surface layer of PP film and a preparation method thereof, which is used for indoor floor decoration, has light weight, comfortable foot feeling, and is extremely environmentally friendly.

In order to achieve the above object, the technical solution adopted in the present invention is: a preparation method of a composite wooden floor whose surface layer is a PP film, which comprises:

Step 101, preparation of the composite solid wood substrate layer: uniformly gluing the rotary-cut veneers of one or more fast-growing materials (eucalyptus, beech, poplar, birch, etc.) and hot-pressing them into plywood or laminated veneer , the adhesive used is an environmentally friendly adhesive;

Step 102, base material layer I forming: After balanced drying, the solid wood composite base material layer is cut into small pieces of equal width, and after sanding with a sander to determine the thickness, use a slotting device to mill out tongues and grooves around the surroundings. Strict inspection and then stacked to be coated;

Step 103, preparing a PP film with a thickness of 0.1-0.5mm, and the surface of the PP film is a decorative ink layer and a hard coat layer;

Step 104, slitting the PP film according to the specifications coated by the substrate layer I, and cutting it into small rolls, the width of the PP film is slightly larger than the width of the substrate layer I;

Step 105, place the required PP film on the coating equipment. After the back of the PP film is evenly scraped and coated with PUR hot melt adhesive, it is immediately attached to the substrate layer I and rolled on the surface with a pressure wheel to make the PP film combined with the substrate layer I;

In step 106, the clad slab is cured to fully react and solidify the PUR hot melt adhesive to obtain a finished product.

In step 105 of the preparation method of a composite wooden floor whose surface layer is a PP film provided by the present invention, the coating amount of PUR hot melt adhesive is required to be 35-60 g/㎡.

In step 106 of the preparation method of a composite wooden floor whose surface layer is a PP film provided by the present invention, the temperature, humidity and time of health preservation are as follows: temperature of health preservation is 15°C-35°C, humidity of health preservation is 50%-80%, time of health preservation≥ 24h.

The composite wooden floor whose surface layer is a PP film prepared by the aforementioned preparation method comprises: a base material layer I, a PP film decoration layer; the PP film decoration layer is coated on the top surface of the base material layer I, and The PP film decoration layer and the substrate layer I are bonded into one by PUR hot-melt adhesive.

In the composite wooden floor provided by the present invention, the substrate layer I is a multi-layer plywood or a single-layer laminate prepared by using an environment-friendly adhesive.

In the composite wooden floor provided by the present invention, the adhesive is lignin glue or soybean glue.

In the composite wooden floor provided by the present invention, the PP film decoration layer adopts a PP film with a thickness of 0.1-0.5 mm, and the surface of the PP film is provided with a decorative ink and a hard coating.

In the composite wooden floor provided by the present invention, the coating amount of the PUR hot melt adhesive is 35-60g/㎡.

In the composite wooden floor provided by the present invention, the PP film decoration layer has an extension part extending to the side of the base material layer I, and the extension part is bonded to the base material layer I through PUR hot melt adhesive.

Compared with prior art, the advantage of the present invention is:

1. The surface layer provided by the present invention is the preparation method of the composite wooden floor of PP film, and used raw material is all very environmental protection, and the preparation process of product and use process all can not cause harm to environment and human body. PUR hot melt adhesive does not contain any organic solvents, 100% solid content, green and environmentally friendly; PP film can be degraded when recycled, only releases water and carbon dioxide when burned, and does not produce any toxic gases.

2. The preparation method of the composite wooden floor whose surface layer is a PP film provided by the present invention, the PP film has good formability and low price, the curing speed of PUR hot melt adhesive is fast and the bonding strength is large, continuous production can be realized, and the production rate is fast .

3. In the products obtained by the preparation method provided by the present invention, the floor formaldehyde emission is ≤0.05 mg/m ³ , which is far lower than the national standard requirement of 0.124 mg/m ³ .

4. Polypropylene (PP) has good comprehensive properties, such as mechanical properties, heat resistance, fatigue resistance, chemical corrosion resistance and electrical insulation, etc. The floor of the present invention also has excellent comprehensive properties.

5. The PP film used in the present invention is a light thermoplastic resin, which is coated on the surface of the solid wood composite base material, and the floor feels extremely comfortable.

6. The PP film is covered on the floor surface, which has excellent sealing performance, has the function of blocking water vapor and formaldehyde release, and is waterproof, moisture-proof and environmentally friendly.

Description of drawings

Fig. 1 is a flowchart of a preparation method of a composite wooden floor whose surface layer is a PP film in the first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a composite wooden floor whose surface layer is a PP film in the second embodiment of the present invention.

Detailed ways

The technical solution adopted by the present invention will be further described below in combination with schematic diagrams.

Related terms are explained as follows in the present invention:

PP: Polypropylene (Polypropylene), a thermoplastic resin obtained by polymerizing propylene.

PUR (Polyurethane Reactive): Moisture-curing reactive polyurethane hot melt adhesive, a polymer with urethane chain segment repeating structural units formed by the reaction of isocyanate and polyol.

Embodiment 1: referring to Fig. 1, a kind of surface layer is the preparation method of the composite wooden floor of PP film, it comprises: Step 101, the preparation of composite solid wood substrate layer: after gluing with 7 layers of solid wood rotary-cut veneer, press wood The plywood base material is prepared from slabs with criss-cross grain directions, the base material size is 1220*1300*15.2mm, and the adhesive is lignin glue or soybean glue, wherein the lignin glue is lignin adhesive.

Step 102. Forming of base material layer I: Dry the base material to a moisture content of 6%-12%, cut it into small pieces of 1220*160*15.2mm, use a sander and a 150-mesh abrasive belt to sand the base material to determine the thickness Light, using Jintian Himile grooving equipment to open the mortise and groove to obtain a specification of 1200*150*15mm.

Step 103, preparing a PP film: preparing a PP film with a thickness of 0.2mm and a decorative ink and a hard coat on the surface.

Step 104, PP film cutting: Cut the PP film into small rolls according to the specifications coated by the substrate layer I, and the width of the PP film is slightly larger than the width of the substrate layer I, for example: cut into 154-164mm width and rolled into a neat film roll.

Step 105, PP film coating: PP film rolls are placed on the Babelan laminating and veneering equipment, the back of the PP film is evenly coated with PUR hot melt adhesive, and then pressed onto the surface of the substrate with a pressure roller, and the excess width of the PP film is used The inclined pressure wheel is rolled and attached to the side of the substrate; the brand of PUR hot melt adhesive is bostik, and the amount of glue applied is 35g/㎡;

Step 106, health preservation: the coated plate is placed in a constant temperature and humidity room for health preservation at a temperature of 25° C., a humidity of 60%, and a time of 24 hours to obtain a finished product.

Step 107. Finished product inspection: Finished product inspection is carried out according to "GB/T 17657-2013 Test Methods for Physical and Chemical Properties of Wood-based Panels and Finished Wood-based Panels", and the results are shown in Table 1:

Table 1

Embodiment 2: Referring to Fig. 2, the composite wooden floor whose surface layer is a PP film comprises a base material layer 1300 and a PP film decoration layer 400, and the PP film decoration layer is coated on the top surface of the base material layer 1, and the PP The film decoration layer and the substrate layer I are bonded together by PUR hot-melt adhesive, and the PUR hot-melt adhesive forms a PUR hot-melt adhesive layer 500, and the coating amount of the PUR hot-melt adhesive is 35-60g/㎡, For example, 50g/㎡.

The composite wooden floor provided in this embodiment has low hardness, comfortable foot feeling, environmental protection, and formaldehyde emission ≤0.05 mg/m ³ .

It should be pointed out that the substrate layer I300 is multi-layer plywood or single-layer laminated lumber prepared with environmentally friendly adhesives, and the adhesives include but not limited to lignin glue and soybean glue.

In FIG. 2 , the PP film decoration layer 400 adopts a 0.1-0.5 mm PP film, such as a 0.3 mm PP film, and the surface of the PP film is provided with decorative ink and a hard coat.

It is worth mentioning that, referring to Fig. 2, the PP film decoration layer 400 has an extension 400' extending to the side of the substrate layer I, and the extension part is bonded to the substrate layer I by PUR hot-melt adhesive, and the PP film of excess width Using oblique pressure rollers to roll and attach to the side of the substrate can not only improve the stability of the PP film installation, but also enhance the area covered by the PP film on the entire ground, and further inhibit the escape of related media. This is due to the PP film coating On the surface of the floor, it has excellent sealing properties, has the function of blocking water vapor and formaldehyde release, and has excellent waterproof, moisture-proof and environmental protection effects.

For the preparation method of the composite wooden floor with the surface layer of PP film mentioned in this embodiment, reference may be made to Embodiment 1, and details will not be repeated here.

The floor provided by the invention can be used for indoor floor decoration, and has light weight, comfortable foot feeling and extremely environmental protection. It should be pointed out that the formaldehyde emission value of the national standard "GB 18580-2017 Formaldehyde Release Limits in Wood-based Panels and Their Products for Interior Decoration Materials" is 0.124mg/m ³ , and the formaldehyde emission of the floor provided by the invention is ≤0.05mg/m ³ , far below the national standard requirements.

In addition, the PP film-covered floor provided by the present invention has a solid wood composite base material layer, a PP film, and a PUR hot-melt adhesive layer. Melt glue is bonded and combined into one body. Compared with the prior art, this type of structure is more suitable for paving the ground as a base plate.

The foregoing are only preferred embodiments of the present invention, and do not limit the present invention in any way. Any person skilled in the technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the technical solution of the present invention. The content still belongs to the protection scope of the present invention.

Claims (9)

1. a kind of surface layer is the preparation method of the composite wooden floor of PP film, it comprises: Step 101, preparation of a composite solid wood substrate layer; Step 102, forming the substrate layer I; It is characterized in that it also includes the following steps: Step 103, preparing a PP film with a thickness of 0.1-0.5mm, and the surface of the PP film is a decorative ink layer and a hard coat layer; Step 104, slitting the PP film according to the specifications coated by the substrate layer I, and cutting it into small rolls, the width of the PP film is slightly larger than the width of the substrate layer I; Step 105, place the required PP film on the coating equipment. After the back of the PP film is evenly scraped and coated with PUR hot melt adhesive, it is immediately attached to the substrate layer I and rolled on the surface with a pressure wheel to make the PP film combined with the substrate layer I; In step 106, the clad slab is cured to fully react and solidify the PUR hot melt adhesive to obtain a finished product. 2. A method for preparing a composite wooden floor whose surface layer is a PP film according to claim 1, characterized in that, in step 105, the coating amount of PUR hot melt adhesive is required to be 35-60 g/㎡. 3. a kind of surface layer according to claim 1 is the preparation method of the composite wooden floor of PP film, it is characterized in that, in described step 106, the temperature, humidity, time of health preservation are as follows: The temperature for curing is 15°C-35°C, the humidity for curing is 50%-80%, and the curing time is ≥24 hours. 4. a kind of surface layer that utilizes the preparation method as described in claim 1-3 to prepare is the composite wooden floor of PP film, it is characterized in that, it comprises: substrate layer 1, PP film decorative layer; The PP film decoration layer is coated on the top surface of the base material layer I, and the PP film decoration layer and the base material layer I are bonded together by PUR hot melt adhesive. 5. The composite wooden floor according to claim 4, characterized in that, the base material layer I is a multi-layer plywood or a single-layer laminated lumber prepared by an environmental-friendly adhesive. 6. The composite wooden floor according to claim 5, wherein the adhesive is lignin glue or soybean glue. 7. The composite wooden floor according to claim 4, characterized in that, the PP film decoration layer is a PP film with a thickness of 0.1-0.5 mm, and the surface of the PP film is provided with a decorative ink and a hard coating. 8. The composite wooden floor according to claim 4, characterized in that, the coating amount of the PUR hot melt adhesive is 35-60g/㎡. 9. The composite wooden floor according to claim 4, wherein the PP film decorative layer has an extension extending to the side of the substrate layer I, and the extension is bonded to the substrate layer I by PUR hot melt adhesive .