CN103753656A - Flexible composite veneer and processing method thereof - Google Patents

Abstract

The invention discloses a flexible composite decorative veneer and a processing method thereof. The flexible composite decorative veneer includes a decorative veneer layer and a plastic film layer. The plastic film layer is compounded on the decorative veneer by heating and pressing. The flexible reinforcement layer is also a composite bonding layer between veneer and substrate. The flexible composite decorative veneer can be painted or not painted on the surface of the composited decorative veneer according to the needs of the finish. The veneer layer is natural decorative veneer or recombined decorative veneer with a thickness of 0.06-0.3 mm; the plastic film layer is treated or untreated polyethylene, polypropylene or other plastic films with a thickness of 0.02-0.8 mm; The above-mentioned paint layer is polyurethane primer, ultraviolet curing primer or nitro-based primer. This product can be used for the surface decoration of all kinds of wood products, doors and windows, and the surface of the plank surface and the flat part, avoiding the glue penetration problem that is easy to occur during the processing and use of traditional non-woven fabrics or paper-based decorative veneer, and the decorative veneer Good water resistance and flexibility, good environmental protection, to ensure the quality and beauty of decorative veneer.

Description

A kind of flexible composite veneer and its processing method

technical field

The invention relates to a flexible composite decorative veneer with a paint film or a paint film and a processing method thereof, which belongs to the wood processing industry and is a new technology used in the fields of decoration, wood products, furniture, doors and windows curved or plane surface decoration. craft.

Background technique

Wood has good natural texture and color, giving people a fresh and natural feeling, so it is favored by more and more people.

With the scarcity of precious wood resources and the continuous research on wood product processing technology, thin wood materials are used more and more in interior home decoration, wood product manufacturing, such as edge banding and curved or flat surfaces of wooden furniture, doors and windows, lines and cabinets. more and more.

At present, in the veneering of curved surfaces and right-angle surfaces of wood products and furniture decoration, decorative veneer (unpainted) with non-woven fabric or backing paper on the back is usually used to avoid cracking, cracking and deformation of wood grain. However, non-woven fabrics use petroleum as raw material, which is difficult to completely degrade, and various adhesives are often used for laminating veneer and non-woven fabrics, which is relatively not environmentally friendly; at the same time, because veneer is relatively thin, it is prone to glue bleeding during the production process. And with the influence of light, temperature and humidity changes, it is easy to produce peeling of veneer and non-woven fabric, veneer and backing paper, which affects the decorative effect of its surface veneer, greatly shortens the service life of veneer veneer products, and its The water resistance is poor; in addition, the unpainted non-woven fabric is decorated with veneer veneer and then painted. The painting, drying and polishing processes are relatively complicated and the production efficiency is low.

Contents of the invention

In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a flexible composite veneer and its processing method, which avoids the problem of glue penetration that is easy to occur during the processing and use of traditional non-woven decorative veneer, and ensures that the decorative veneer Excellent beauty and quality; can be directly used for curved surface and right-angle cladding, reducing complicated processes such as painting, drying, and sanding.

A kind of flexible composite veneer and its processing method described in the present invention comprise the following technical solutions:

A flexible composite veneer with a paint film, comprising a decorative veneer layer, a plastic film layer and a paint layer, the plastic film layer is compounded on the decorative veneer by heating and pressing, and then a layer of ordinary paint or elastic paint is coated on the surface of the composite decorative veneer; The decorative veneer layer is 0.06-0.3mm thick natural decorative veneer or recombined decorative veneer, or modified decorative veneer; the plastic film layer is treated or untreated polyethylene, polypropylene or other The material is plastic film with a thickness of 0.02-0.5 mm; the paint layer is polyurethane primer (top) paint, ultraviolet light curing primer (top) paint or nitrocellulose base (top) paint, etc.

As a preference of the above solution, the decorative veneer layer is 0.06-0.3 mm thick natural decorative veneer or recombined decorative veneer, or decorative veneer that has been modified by softening, carbonization or the like. When the decorative veneer layer is combined with the plastic film layer, various coupling agents such as silane coupling agent, maleic anhydride coupling agent and polyurethane coupling agent can be added. The coupling agent can be applied to decorative veneer or plastic film. Coupling agents or additives can also be added to plastic granulation, and plastic films can be made into plastic films by extrusion molding with polyethylene, polypropylene, etc.

Another object of the present invention is to provide a flexible composite veneer with a paint film or a paint film and a processing method thereof.

A flexible composite veneer with a paint film and a processing method thereof, comprising the following steps:

a) Slice the wood into decorative veneers of 0.06mm-0.3mm; b) Coupling agent on the plastic film (or not if necessary), the coating amount of the coupling agent is 1%-20% of the plastic film , and then aged for 1-20 minutes; c) pre-compound the decorative veneer described in step a to the decorative film described in step b to form a composite slab, and then add anti-sticking boards (films) on the upper and lower surfaces of the composite slab , the bottom surface is covered with steel plate or industrial felt, which plays the role of cushioning and leveling; d) hot pressing the composite slab, the hot pressing temperature is 100-180°C, the hot-pressing pressure is 0.1-1.0MP, and the hot-pressing time is 1-6 minutes , during the hot pressing process, the pressure can be low first and then the high pressure segmental hot pressing process; e) The anti-adhesive board (film) with the composite decorative veneer is sent to the paint production line, and the surface of the flexible composite decorative veneer is sprayed or rolled Painted in the same way, after one or more steps of painting, drying, and sanding, the flexible composite decorative veneer with paint film that meets the requirements is made.

As an optimization of the above technical solution, in steps c) and d), the upper and lower backing plates can be pressurized at the same time or at different times, and in order to avoid the phenomenon that the plastic film composite decorative veneer is easy to curl, the pressing temperatures on both sides of the upper and lower backing plates can be different .

As a preference of the above technical solution, the pressurization temperature in step d) is 125°C-165°C, the time is 60-150s, and the pressure is 0.6-1.0Mpa.

As an optimization of the above technical solution, in order to avoid the phenomenon that the flexible decorative veneer is easy to curl after the plastic film is laminated with the decorative veneer, the anti-adhesive film in step d) can be made of polytetrafluoroethylene board, and the flexible composite can be directly attached after step d). The PTFE board of the decorative veneer is sent to the paint line for paint finishing, and the thinner PTFE film can be bonded to the MDF on the back.

As a preference of the above technical solution, after step e), a film tearing step is also included. The film tearing step is to tear off the hot-pressed composite decorative veneer from the anti-adhesive board, and roll it into a roll for veneering.

The present invention has the following advantages:

1) Compared with the existing non-woven veneer and backing paper veneer, it does not need to be bonded with adhesives. It is environmentally friendly, simple in operation, not easy to crack and deform, and has good water resistance, avoiding decoration during production. The problem of glue penetration between veneer and non-woven fabric ensures the beauty and quality of decorative veneer;

2) The waterproof performance and flexibility of decorative veneer are greatly improved, the production environment and product environmental protection are improved, and it can be directly used for curved surfaces and right-angle cladding, reducing the need for painting, drying, and drying of veneer veneers in the production process grinding and other processes;

3) The production efficiency is greatly improved, the production cost is saved, the product quality is guaranteed, and it has a good application prospect.

Description of drawings

Fig. 1 is a schematic structural view of a flexible composite veneer with a paint film of the present invention.

Fig. 2 is a schematic diagram of hot-pressed billet assembly in the present invention.

Among them, 1 is the paint layer, 2 is the decorative veneer layer, 3 is the plastic film layer, 4 is the industrial felt, 5 is the lining board, 6 is the anti-adhesive board (film), 7 is the backing board, and 8 is the hot pressing board.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

This specific implementation example is only a further description of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications without creative contribution to this embodiment according to needs after reading this specification, but as long as they are within the scope of the present invention The scope of the claims is protected by the patent law.

Example 1

As shown in Figure 1, a flexible composite veneer with a paint film comprises a decorative veneer layer 2, a plastic film layer 3 and a paint layer 1, the plastic film layer is compounded on the decorative veneer by heating and pressing, and then coated on the surface of the composite decorative veneer. Apply a coat of paint. The specific method includes the following steps:

a) Plane the wood into 0.06mm decorative veneer;

b) Coat the silane coupling agent on the 0.08mm thick plastic film, the coating amount of the coupling agent is 3% of the plastic film, and leave the plastic film coated with the coupling agent for 10 minutes;

c) As shown in Figure 2, pre-composite the decorative veneer 2 described in step a) onto the decorative film 3 described in step b) to form a composite slab, and then add 1mm-thick wood to the lower and lower surfaces of the composite slab. PTFE plate (membrane) 6, lining plate 5 on the top surface, industrial felt 4 and steel plate 5 on the bottom surface, which play the role of cushioning and leveling;

d) The composite slab is hot-pressed in the hot-pressing plate 8, and hot-pressed twice. The temperature of the upper and lower hot-pressing plates is the same, both are 125°C, the hot-pressing time is 150s, and the hot-pressing pressure is 0.6Mpa.

e) Send the PTFE board (film) with hot-pressed composite decorative veneer into the paint production line, roll-coat ultraviolet (UV) curing primer on the surface of the flexible composite decorative veneer, paint and dry in one or more coats , the sanding step is made into a flexible composite decorative veneer with a paint film that meets the requirements.

Example 2

As shown in Figure 1, a flexible composite veneer with a paint film comprises a decorative veneer layer 2, a plastic film layer 3 and a paint layer 1, the plastic film layer is compounded on the decorative veneer by heating and pressing, and then coated on the surface of the composite decorative veneer. Apply a coat of paint. Specifically include the following steps:

a) Plane the wood into 0.2mm decorative veneer;

b) As shown in Figure 2, place the decorative veneer 2 described in step a) on a plastic film 3 with a thickness of 0.06 mm to form a composite slab, and then add polyfluorine with a thickness of 1 mm to the lower and lower surfaces of the composite slab. Vinyl plate (membrane) 6, lining plate 5 on the top surface, industrial felt 4 and steel plate 7 on the bottom surface, which play the role of cushioning and leveling;

c) The composite slab in step b) is hot-pressed in the hot-pressing plate 8, and hot-pressed twice. The temperature of the upper and lower hot-pressing plates is the same, both are 160°C, the hot-pressing time is 120s, and the hot-pressing pressure is 0.6Mpa.

d) Send the PTFE board (film) with hot-pressed composite decorative veneer into the paint production line, roll-coat ultraviolet (UV) curing primer on the surface of the flexible composite decorative veneer, and paint and dry in one or more coats , the sanding step is made into a flexible composite decorative veneer with a paint film that meets the requirements.

Example 3

As shown in Figure 1, a flexible composite veneer with a paint film comprises a decorative veneer layer 2, a plastic film layer 3 and a paint layer 1, the plastic film layer is compounded on the decorative veneer by heating and pressing, and then coated on the surface of the composite decorative veneer. Apply a coat of paint. Specifically include the following steps:

a) Plane the wood into 0.16mm decorative veneer;

b) As shown in Figure 2, place the decorative veneer 2 described in step a) on a 0.05mm thick plastic film 3 to form a composite slab, and then add a 0.02mm thick plastic anti-adhesive film to the lower and lower surfaces of the composite slab 6. Stick the anti-adhesive film to the MDF, add lining board 5 on the top surface, pad industrial felt 4 and steel plate 7 on the bottom surface, and play the role of cushioning and leveling;

c) The composite slab in step b is hot-pressed in the hot-pressing plate 8, and hot-pressed twice. The temperature of the upper and lower hot pressing plates is different, the temperature of the lower hot pressing plate is 140°C, the temperature of the upper hot pressing plate is 125°C, the hot pressing time is 150s, and the hot pressing pressure is 0.8Mpa.

d) Send the polytetrafluoroethylene membrane plate with hot-pressed composite decorative veneer into the paint production line, spray polyurethane (PU) paint on the surface of the flexible composite decorative veneer, and make it conform to the requirements of one or more steps of painting, drying and sanding Painted flexible composite trim veneer on request.

Example 4

As shown in Figure 1, a flexible composite veneer with a paint film comprises a decorative veneer layer 2, a plastic film layer 3 and a paint layer 1, the plastic film layer is compounded on the decorative veneer by heating and pressing, and then coated on the surface of the composite decorative veneer. Apply a coat of paint. Specifically include the following steps:

a) Plane the wood into 0.2mm decorative veneer;

b) Add maleic anhydride-grafted polyethylene particles to the linear low-density polyethylene particles, and form a 0.08mm thick plastic film after extrusion by an extruder;

c) As shown in Figure 2, place the decorative veneer 2 described in step a) on the plastic film 3 made in step b to form a composite slab, and then add four 1mm thick slabs to the lower and lower surfaces of the composite slab. Vinyl fluoride plate (membrane) 6, lining plate 5 on the top surface, industrial felt 4 and steel plate 7 on the bottom surface, which play the role of cushioning and leveling;

d) The composite slab in step b) is hot-pressed in the hot-pressing plate 8, and hot-pressed twice. The temperature of the upper and lower hot-pressing plates is the same, both are 140°C, the hot-pressing time is 150s, and the hot-pressing pressure is 1Mpa.

e) Send the PTFE board (film) with hot-pressed composite decorative veneer into the paint production line, roll-coat ultraviolet (UV) curing primer on the surface of the flexible composite decorative veneer, paint and dry in one or more coats , the sanding step is made into a flexible composite decorative veneer with a paint film that meets the requirements.

The above only uses silane coupling agent as coupling agent, polytetrafluoroethylene board as anti-sticking board, and polyurethane paint as paint film material to illustrate the production method of flexible composite veneer with paint film. According to the disclosure of the above implementation examples, the purpose of the present invention can also be achieved by using other materials, and thus also belong to the scope of the present invention.

Claims (7)

1. a flexible compound veneer, is characterized in that, comprises decorative veneer layer, plastic film layers, and plastic film layers is pressurizeed and is compound on decorative veneer layer by heating; Described veneer layer is natural finiss veneer or the recombinant decorative veneer that 0.06～0.3mm is thick; Described plastic film layers is treated or untreated polyethylene, polypropylene or other materials plastic sheeting, and thickness is 0.02～0.5mm.

2. flexible compound veneer according to claim 1, is characterized in that, described decorative veneer layer also can be the decorative veneer through modifications such as softening, charings.

3. flexible compound veneer as claimed in claim 1, described decorative veneer layer and plastic film layers compound tense, can add coupling agent.

4. flexible compound veneer as claimed in claim 3, is characterized in that, described coupling agent is for being silane coupling agent, maleic anhydride class coupling agent and polyurethanes coupling agent.

5. flexible compound veneer as claimed in claim 3, is characterized in that, described coupling agent can be applied to decorative veneer, or plastic sheeting, also coupling agent or additive etc. can be added in plastic granulating, through extrusion molding and polyethylene, polypropylene etc., makes plastic sheeting.

6. the flexible compound veneer as described in as arbitrary in claim 1 to 5, it is characterized in that, also comprise skin of paint, this skin of paint can be conventional oil enamelled coating or elasticity skin of paint, this skin of paint is coated on described decorative veneer surface, and described skin of paint is (face) paint etc. at the bottom of (face) paint or nitro at the bottom of (face) paint, ultraviolet light polymerization at the bottom of polyurethane.

7. a processing method for flexible compound decorative veneer, is characterized in that, comprises following step:

A) by timber slicing or be peeled into the decorative veneer of 0.06mm～0.3mm;

B) on plastic sheeting, be coated with coupling agent, coupling agent coated weight is 1%～20% of plastic sheeting weight, then displays 1～20min;

C) decorative veneer described in step a) is compound in advance on the decorative veneer described in step b) and forms composite plate blanks, then on the upper and lower surface of composite plate blanks, add respectively Antisticking (film), bottom surface pading plate or industrial felt;

D) described composite plate blanks is carried out to hot pressing, 100～180 ℃ of hot pressing temperatures, hot pressing pressure 0.1～1.0MP, can adopt single or multiple lift hot press, also can adopt roll squeezer pressurization compound.Adopt single or multiple lift hot press pressurization compound tense, hot pressing time 1～6 minute, can adopt first low rear high sublevel heat pressing process of pressure in hot pressing.Adopt roll squeezer pressurization compound tense, composite plate blanks need be through the pre-heat treatment;

E) send adding backing plate or do not add backing plate together with the Antisticking (film) through the compound good decorative veneer of hot pressing and plastic film layers one side into oil paint production line, on flexible compound decorative veneer surface, adopt the modes such as spraying, roller coat to coat common or elasticity paint, through one or multi-channel japanning, dry, sanding step is made satisfactory band paint film flexible compound decorative veneer.

Images