CN103481599B - A kind of flexible decoration veneer - Google Patents

Abstract

The present invention relates to a kind of flexible decoration veneer, preparation method is as follows: a, veneer arrange; B, impregnation; C, applying glue; D, reel; E, cutting; F, combination of mating formation; G, hot pressing; H, cutting edge grade packing.The present invention has following beneficial effect: 1, the present invention has rapid surface drying, adhesive strength feature that is high, not easily strike-through; 2, the invention solves in flexible decoration veneer manufacture process, problem easily bonding mutually during non-woven fabrics reel after applying glue; 3, this invention also solves strike-through problem, ensure the attractive in appearance of flexible decoration veneer.

Description

A kind of flexible decorative veneer

technical field

The invention belongs to the wood processing industry, in particular to a flexible decorative veneer.

Background technique

General natural veneer or recombined decorative veneer, especially thin veneer is brittle, not flexible enough, and easy to crack, so it is not suitable for the decoration of special-shaped structural surfaces. Flexible decorative veneer is a reelable and flexible decorative veneer that is laminated with non-woven fabric or kraft paper and other reinforcing materials on the back of natural veneer or recombined decorative veneer. This not only enhances the flexibility of the recombined decorative veneer, but also increases the overall thickness of the product, saving wood resources. The veneer can be used for decorative veneering of various special-shaped curved surfaces, and is also suitable for veneering of bas-relief surfaces, which broadens the application range of traditional veneer.

In the prior art, the hot press commonly used in the wood processing industry is a multi-layer press, and the non-woven fabric is in the form of a roll of cloth. Therefore, it is necessary to unroll the roll of the non-woven fabric and cut it into sheets according to the length of the veneer. Then, according to the conventional plywood production process, sizing, pasting, and hot and cold pressing are carried out. Since the non-woven fabric will be rolled into the gluing machine when the roller is sizing, it cannot be sizing normally. Therefore, some people use the glue spraying method to sizing, such as the scientific literature: "Research on the Manufacturing Process of Flexible Artificial Decorative Veneer", Li Niancun, Xiang Qin, Yang Canming, Journal of Central South Forestry University, June 2000, Volume 20, Issue 2.

The above literature uses modified urea-formaldehyde resin glue with a solid content of 55% (mass fraction) as the adhesive, and uses glue spraying for sizing. However, the cost of the adhesive is high, and the common roller coating sizing process needs to be changed, and the operation requirements are high. Easy to leak glue and other defects.

For this reason, under the premise of not changing the sizing method, the method of continuously sizing the non-woven fabric is used for sizing, that is, the non-woven fabric is first unfolded, and after sizing by the roller, it is reeled at the exit of the gluing machine. , so that the non-woven fabric is stretched straight to avoid being rolled into the gluing machine.

The above process solves the problem that the non-woven fabric is rolled into the glue machine when sizing, but when the non-woven fabric is rolled after sizing, the adhesive will be cured, so that the non-woven fabric is bonded to each other, and cannot be unfolded and cut into sheets again. , cannot enter the next process. Therefore, there is an urgent need for an adhesive that can dry quickly without affecting the final bond strength.

Contents of the invention

In order to solve the above technical problems, the object of the present invention is to provide a flexible decorative veneer. The method uses an adhesive, which has the characteristics of rapid surface drying, high bonding strength, and not easy to seep through, so as to ensure the appearance of the flexible decorative veneer.

In order to achieve the above object, the present invention adopts the following technical solutions:

A kind of flexible decorative veneer, the method comprises the following steps:

a. Veneer finishing: first classify and sort the decorative veneer;

B, glue adjustment: mix urine glue, white glue, flour, lignin, and cationic surfactant by mass ratio, and its mass ratio is: urine glue: white glue: flour: lignin: cationic surfactant =100:(40～60):(5～15):(5～15):(0.1～0.5); stir for 10～20 minutes;

c. Sizing: Roller sizing of non-woven fabrics or kraft paper, the amount of sizing is controlled at 30-50g/m ² ;

d. Roll: roll the glued non-woven fabric or kraft paper into a roll for easy cutting;

e. Cutting: Cut the roll of non-woven fabric or kraft paper into required length specifications;

f. Pavement combination: combine the cut non-woven fabric or kraft paper and decorative veneer pavement into a slab;

g, hot pressing: the above-mentioned slab is sent into a hot press for hot pressing to obtain a semi-finished product;

h. Edge cutting and grading and packaging: Cut the above semi-finished products and grade them according to their appearance quality to obtain this product and pack it into the warehouse.

Preferably, said urine glue: white glue: flour: lignin: cationic surfactant = 100: (40-50): (5-10): (5-10): (0.1-0.2).

As preferably, described urine glue: white glue: flour: lignin: cationic surfactant=100:40:5:5:0.1.

Preferably, said urine glue: white glue: flour: lignin: cationic surfactant = 100: (50-60): (10-15): (10-15): (0.2-0.5).

As preferably, described urine glue: white glue: flour: lignin: cationic surfactant=100:60:15:15:0.5.

Preferably, the cationic surfactant is dodecyltrimethylammonium chloride or cetyldimethylbenzylammonium chloride.

Preferably, during the hot pressing, the temperature is 90-130°C, the time is 30-120s, and the pressure is 0.7Mpa-1.1Mpa.

Due to the adoption of the above-mentioned technical scheme, the present invention uses lignin in the adhesive to replace part of the flour, which can not only reduce the amount of flour used, reduce production costs, but also absorb part of the free formaldehyde in the adhesive, further reducing the cost of flexible decorative veneer. Formaldehyde emission. Cationic surfactants have the characteristics of good chemical stability, heat resistance, light resistance, pressure resistance, strong acid and alkali resistance, etc., and also have excellent permeability, emulsification, softness, antistatic and bactericidal properties. The addition of cationic surfactants can not only make the adhesive layer of flexible decorative veneer have certain flexibility, reduce the brittleness of the adhesive layer, avoid the damage of flexible decorative veneer during use, but also make the flexible decorative veneer have mildew resistance. , anti-corrosion function, prolonging the service life of the product. Using the above adhesive ratio, and controlling the amount of sizing at 30-50g/m ² , it is easy to dry quickly after sizing on the non-woven fabric, and the roll of non-woven fabric after gluing can be glued without bonding. It is convenient to enter the next process; at the same time, after hot pressing, the glue will neither penetrate into the upper surface of the restructured decorative veneer nor the lower surface of the non-woven fabric, which will not affect the appearance quality of the product. The invention adopts a reasonable adhesive ratio and sizing amount, and solves the problems of easy bonding of non-woven rolls after sizing and glue seepage on the surface of products after hot pressing.

The product prepared by using the adhesive of the present invention meets the requirements of the national standard II dipping and peeling test. After being soaked in hot water at (63±3)°C for 3 hours, it is placed in a drying oven at (63±3)°C for 3 hours, and the adhesive layer has no peeling and peeling. stratification phenomenon.

In summary, the present invention has the following beneficial effects:

1. The present invention has the characteristics of rapid surface drying, high bonding strength, and not easy to seep through;

2. The present invention solves the problem that the non-woven rolls after gluing are easily bonded to each other during the manufacturing process of flexible decorative veneer;

3. The present invention also solves the problem of glue seepage and ensures the beauty of the flexible decorative veneer.

Detailed ways

This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contribution as required after reading this specification, but as long as they are within the rights of the present invention All claims are protected by patent law.

Example 1

An adhesive used to manufacture flexible decorative veneer, which is uniformly mixed with urine glue, white glue, flour, lignin, and cationic surfactants. Since the adhesive is easily affected by environmental temperature changes, the bonding strength is therefore, in In actual use, the adhesive ratio should be adjusted according to seasonal changes. For example: in summer, the temperature is higher, and the adhesive cures faster. The mass ratio is: urine glue: white glue: flour: lignin: cationic surfactant = 100:40:5:5:0.1; while the temperature in winter is lower , the adhesive solidifies slowly, and the mass ratio is: urine glue: white glue: flour: lignin: cationic surfactant=100:60:15:15:0.5. The above-mentioned cationic surfactant is lauryl trimethyl ammonium chloride or hexadecyl dimethyl benzyl ammonium chloride.

Example 2

Use the adhesive described in the embodiment of the present invention 1 to manufacture the operation of flexible decorative veneer as follows:

a. Veneer finishing: first classify and sort the decorative veneer;

b. Glue adjustment: mix urine glue, white glue, flour, lignin, and cationic surfactant according to the mass ratio, and stir for 10 to 20 minutes;

c. Sizing: Roller sizing of non-woven fabrics, the amount of sizing is controlled at 30-50g/m ² ;

d. Roll: roll the non-woven fabric that has been glued into a roll for easy cutting;

e. Cutting: Cut the non-woven fabric of the roll into the required length specification;

f. Pavement combination: combine the cut non-woven fabric and decorative veneer pavement into a slab;

g. Hot pressing: send the above-mentioned slab into a hot pressing machine for hot pressing to obtain a semi-finished product. During the hot pressing, the temperature is 90-130°C, the time is 30-120s, and the pressure is 0.7Mpa-1.1Mpa;

h. Edge cutting and grading and packaging: Cut the above semi-finished products and grade them according to their appearance quality to obtain this product and pack it into the warehouse.

The product prepared by using the adhesive of the present invention meets the requirements of the national standard II dipping and peeling test. After being soaked in hot water at (63±3)°C for 3 hours, it is placed in a drying oven at (63±3)°C for 3 hours, and the adhesive layer has no peeling and peeling. stratification phenomenon.

Example 3

Use the adhesive described in the embodiment of the present invention 1 to manufacture the operation of flexible decorative veneer as follows:

a. Veneer finishing: first classify and sort the decorative veneer;

b. Glue adjustment: mix urine glue, white glue, flour, lignin, and cationic surfactant according to the mass ratio, and stir for 10 to 20 minutes;

c. Sizing: Roller sizing of kraft paper, the amount of sizing is controlled at 30-50g/m ² ;

d. Roll: roll the glued kraft paper into a roll for easy cutting;

e. Cutting: Cut the roll of kraft paper into required length specifications;

f. Pavement combination: combine the cut kraft paper and decorative veneer pavement into a slab;

g. Hot pressing: send the above-mentioned slab into a hot pressing machine for hot pressing to obtain a semi-finished product. During the hot pressing, the temperature is 90-130°C, the time is 30-120s, and the pressure is 0.7Mpa-1.1Mpa;

h. Edge cutting and grading and packaging: Cut the above semi-finished products and grade them according to their appearance quality to obtain this product and pack it into the warehouse.

The product prepared by using the adhesive of the present invention meets the requirements of the national standard II dipping and peeling test. After being soaked in hot water at (63±3)°C for 3 hours, it is placed in a drying oven at (63±3)°C for 3 hours, and the adhesive layer has no peeling and peeling. stratification phenomenon.

Claims (1)

1. a kind of flexible decorative veneer, the preparation method of this flexible decorative veneer comprises the following steps: a. Veneer finishing: first classify and sort the decorative veneers; B, glue adjustment: urine glue, white glue, flour, lignin, cationic surfactant five are mixed by mass ratio, and its mass ratio is: summer, urine glue: white glue: flour: lignin: cationic surface Active agent=100:40:5:5:0.1; Winter, urine glue: white glue: flour: lignin: cationic surfactant=100:60:15:15:0.5; stir 10-20 minutes; The cationic Surfactant is lauryl trimethyl ammonium chloride or hexadecyl dimethyl benzyl ammonium chloride; C, sizing: carry out roller sizing to non-woven fabric or kraft paper, the sizing amount is controlled at 30-50g/m ² ; d. Roll: Roll the glued non-woven fabric or kraft paper into a roll for easy cutting; e. Cutting: Cut the roll of non-woven fabric or kraft paper into required length specifications; f. Paving combination: combine the cut non-woven fabric or kraft paper and decorative veneer paving into a slab; g, hot pressing: sending the above-mentioned slab into a hot press for hot pressing to obtain a semi-finished product; h. Trimming and grading and packaging: trim the above-mentioned semi-finished products and classify them according to their appearance quality to obtain this product and pack it into the warehouse; The product prepared by the above steps meets the requirements of the national standard type II dipping and peeling test. After soaking in hot water at (63±3 )°C for 3 hours, it is dried in a drying oven at (63±3 )°C for 3 hours. The adhesive layer has no peeling and separation. layer phenomenon.