阅读说明：本技术 一种高仿真数码打印浸渍胶膜纸的制备方法及产品和应用 (Preparation method, product and application of high-simulation digital printing impregnated bond paper ) 是由 孙伟 姚红鹏 陈跃龙 魏斌 于 2021-07-14 设计创作，主要内容包括：本发明公开了一种高仿真数码打印浸渍胶膜纸的制备方法及产品和应用,该制备方法包括：1)制备数码打印用油墨,对树种的天然纹理进行仿真扫描及数码打印,得到带有树种天然纹理的木纹纸；2)制备浸渍胶水；3)浸渍。本发明通过高仿真喷涂数码打印制造工艺,将降香黄檀、柚木等极其昂贵的珍贵树种的天然纹理应用到包括木地板在内的板材上,珍贵树种的自然美丽花纹在板材表面呈现,不仅再现自然美丽的花纹,而且消除天然木材的自身缺陷,达到尽善尽美的程度,且花纹重复少,带动了整个地板行业环保革新,提升了产品的文化品味,最终达到提高附加值的目的；采用数码打印技术,减少制版时间,降低版辊损耗,提高开版成功率。(The invention discloses a preparation method of high-simulation digital printing impregnated bond paper, a product and application, wherein the preparation method comprises the following steps: 1) preparing ink for digital printing, and performing simulation scanning and digital printing on the natural textures of the tree seeds to obtain wood-grain paper with the natural textures of the tree seeds; 2) preparing impregnating glue; 3) and (4) dipping. According to the invention, through a high-simulation spraying digital printing manufacturing process, natural textures of extremely expensive precious tree species such as dalbergia odorifera, teak and the like are applied to boards including wood floors, natural beautiful patterns of the precious tree species are presented on the surfaces of the boards, the natural beautiful patterns are reproduced, the self defects of natural wood are eliminated, the degree of perfection is achieved, the pattern repetition is less, the environmental protection innovation of the whole floor industry is driven, the culture taste of products is improved, and the purpose of improving the added value is finally achieved; by adopting a digital printing technology, the plate making time is reduced, the plate roller loss is reduced, and the plate opening success rate is improved.)

1. A preparation method of high-simulation digital printing impregnated bond paper is characterized by comprising the following steps:

1) preparing ink for digital printing, and performing simulation scanning and digital printing on the natural textures of the tree seeds to obtain wood-grain paper with the natural textures of the tree seeds;

2) preparation of impregnating glue

3) Impregnation

The wood grain paper with the tree species natural texture digitally printed by the ink obtained in the step 1) is soaked in the soaking glue obtained in the step 2) to obtain the required high-simulation digitally-printed soaking glue film paper which can present the tree species natural texture, and the simulation degree is more than or equal to 95%.

2. The preparation method of the high-simulation impregnated bond paper for digital printing according to claim 1, wherein in the step 1), the ink comprises the following components in percentage by mass:

casein 5-10%

13 to 15 percent of organic pigment powder

4 to 15 percent of aqueous dispersant

Tea polyphenol 6-12%

3 to 7 percent of polyvinyl alcohol

0.5 to 1 percent of wetting defoaming agent

The balance being purified water.

3. The preparation method of the high-simulation impregnated bond paper for digital printing according to claim 1 or 2, wherein the ink is prepared by the following steps:

according to the mass percentage, 5-10% of casein, 4-15% of water-based dispersant, 6-12% of tea polyphenol, 3-7% of polyvinyl alcohol and 0.5-1% of wetting defoamer are uniformly stirred, then 13-15% of organic pigment powder and the balance of purified water are added, and the mixture is ground until the fineness is not more than 0.18mm, so that the ink with the required solid content of 15-20% and the pH value of not less than 8.5 is obtained.

4. The preparation method of the high-simulation impregnated bond paper for digital printing according to claim 1, wherein in the step 2), the impregnated bond paper comprises the following components in parts by weight:

12-15 parts of melamine

14-16 parts of formaldehyde

35-38 parts of sodium hydroxide

40-65 parts of molecular sieve

White corundum 2-10 parts

5-18 parts of aluminum oxide

1029E modifier 0.8-1.2 parts

0.1 to 0.5 portion of triethanolamine

5-8 parts of purified water.

5. The preparation method of the high-simulation impregnated bond paper for digital printing according to claim 4, wherein the impregnated bond paper is prepared by the following steps:

according to parts by weight, 14-16 parts of formaldehyde, 40-65 parts of molecular sieve, 0.8-1.2 parts of 1029E modifier, 35-38 parts of sodium hydroxide, 5-18 parts of aluminum oxide, 2-10 parts of white corundum, 12-15 parts of melamine and 5-8 parts of purified water are stirred and uniformly mixed, and then heating, heat preservation, mist point measurement and cooling are sequentially carried out;

the temperature rising speed is not suitable to be too fast or too slow, and the temperature rises from 25 ℃ to 90 ℃ and is used for 50-70 min; the temperature is kept at 85-95 ℃, the pH value is tested after the temperature is kept for 25-35 min, and the change of the pH value is tested every 20min before the fog point of 0 ℃ appears; testing the fog point after the heat preservation is started for 40min, and if the temperature is not at 0 ℃, testing the fog point at 18 ℃ once every 10 min; cooling to below 70 deg.C, adding triethanolamine, cooling to below 40 deg.C, discharging to obtain pH of 8.9-9.6, viscosity of 14.3-15.3s (25 deg.C), solid content of 50-54%, and density of 1.22-1.24g/cm³The impregnating glue.

6. The method for preparing high-simulation digital printing impregnated bond paper as claimed in claim 1, wherein in step 1), a CRUSE high-definition digital input scanner is used to scan the natural texture of the tree species, and then an EPSON-SureColorb9080ROLAND-SOLJETPRO4-XF-640 digital printer is used to perform digital printing to obtain the required wood grain paper with the natural texture of the tree species.

7. The high-simulation digital printing impregnated bond paper is characterized by being prepared by the preparation method of the high-simulation digital printing impregnated bond paper as claimed in any one of claims 1 to 6, and the gum dipping amount is 150-²The pre-curing degree is 20-75%, the formaldehyde emission is not more than 1.5%, and the volatile matter content is 5.5-9.5%.

8. The use of the high-emulation digital printing impregnated bond paper of claim 7 in the preparation of sheet materials.

9. The application of the high-simulation digital printing impregnated bond paper in the preparation of the wood floor as claimed in claim 8, wherein the wood floor comprises a balance layer, a base material and a facing paper layer which are sequentially arranged from bottom to top, the balance layer, the base material and the facing paper layer are bonded together through high-temperature hot-pressing glue, the facing paper layer is the high-simulation digital printing impregnated bond paper, the base paper with wood grains is obtained by scanning tree species patterns for digital printing treatment, then impregnating and adding the impregnated bond paper to prepare the high-simulation digital printing impregnated bond paper, the natural textures of the tree species can be presented, and the base material is an aldehyde-free high-density fiberboard coated with formaldehyde-free modified isocyanate glue.

Technical Field

The invention belongs to the technical field of plate preparation, and particularly relates to a preparation method of high-simulation digital printing impregnated bond paper, a product and application.

Background

The rapid development of the cultivation of precious tree species resources is an important measure for improving the forest quality and increasing the income of forest farmers. In order to accelerate the promotion of precious tree species cultivation, fully exert the leading demonstration effect of the national precious tree species cultivation demonstration county and further mobilize the enthusiasm of developing precious tree species in various regions, the national forestry agency issues a management method (trial) of the national precious tree species cultivation demonstration county as early as 2013, requires units with serious organizations with conditions to actively report the national precious tree species cultivation demonstration county and guides the wholesale national precious tree species cultivation demonstration county to do precious tree species cultivation demonstration construction work. In recent years, with the continuous establishment of precious tree resource development outline and development planning in various parts of China, precious tree resources in China are entering a rapid development period, but precious tree resources such as dalbergia odorifera, nanmu and teak are difficult to directly realize industrial application in wood floors due to the influence of tree diameter grade and accumulation, have the contradiction of few raw materials and large demand, and cannot well meet the demand of consumers on the precious tree resources. Therefore, how to copy and reproduce the beautiful natural texture of the precious tree species wood by using the high-simulation digital printing technology and then realize the purpose by using the laminate flooring technology, and the use experience of the solid wood flooring becomes a topic of attention of people. Meanwhile, how to develop a precious tree species high-simulation laminate flooring product and realize the high added value application of the precious tree species in the field of flooring becomes a research focus of people, so that the product added value of the laminate flooring can be met, the forest farmer income can be increased, the development of precious tree species resources in China can be promoted, the industrial quality can be improved, and the important role in promoting transformation and upgrading can be played.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to provide a preparation method, a product and application of high-simulation digital printing impregnated bond paper.

In order to achieve the purpose and achieve the technical effect, the invention adopts the technical scheme that:

a preparation method of high-simulation digital printing impregnated bond paper comprises the following steps:

1) preparing ink for digital printing, and performing simulation scanning and digital printing on the natural textures of the tree seeds to obtain wood-grain paper with the natural textures of the tree seeds;

2) preparation of impregnating glue

3) Impregnation

The wood grain paper with the tree species natural texture digitally printed by the ink obtained in the step 1) is soaked in the soaking glue obtained in the step 2) to obtain the required high-simulation digitally-printed soaking glue film paper which can present the tree species natural texture, and the simulation degree is more than or equal to 95%.

Further, in the step 1), the ink comprises the following components in percentage by mass:

casein 5-10%

13 to 15 percent of organic pigment powder

4 to 15 percent of aqueous dispersant

Tea polyphenol 6-12%

3 to 7 percent of polyvinyl alcohol

0.5 to 1 percent of wetting defoaming agent

The balance being purified water.

Further, the ink is prepared by adopting the following steps:

according to the mass percentage, 5-10% of casein, 4-15% of water-based dispersant, 6-12% of tea polyphenol, 3-7% of polyvinyl alcohol and 0.5-1% of wetting defoamer are uniformly stirred, then 13-15% of organic pigment powder and the balance of purified water are added, and the mixture is ground until the fineness is not more than 0.18mm, so that the ink with the required solid content of 15-20% and the pH value of not less than 8.5 is obtained.

Further, in the step 2), the impregnating glue comprises the following components in parts by weight:

12-15 parts of melamine

14-16 parts of formaldehyde

35-38 parts of sodium hydroxide

40-65 parts of molecular sieve

2-10 parts of white corundum

5-18 parts of aluminum oxide

1029E modifier 0.8-1.2 parts

0.1 to 0.5 portion of triethanolamine

5-8 parts of purified water.

Further, the impregnating glue is prepared by the following steps:

according to parts by weight, 14-16 parts of formaldehyde, 40-65 parts of molecular sieve, 0.8-1.2 parts of 1029E modifier, 35-38 parts of sodium hydroxide, 5-18 parts of aluminum oxide, 2-10 parts of white corundum, 12-15 parts of melamine and 5-8 parts of purified water are stirred and uniformly mixed, and then heating, heat preservation, mist point measurement and cooling are sequentially carried out;

the temperature rising speed is not suitable to be too fast or too slow, and the temperature rises from 25 ℃ to 90 ℃ and is used for 50-70 min; the temperature is kept at 85-95 ℃, the pH value is tested after the temperature is kept for 25-35 min, and the change of the pH value is tested every 20min before the fog point of 0 ℃ appears; testing the fog point after the heat preservation is started for 40min, and if the temperature is not at 0 ℃, testing the fog point at 18 ℃ once every 10 min; cooling to below 70 deg.C, adding triethanolamine, cooling to below 40 deg.C, discharging to obtain pH of 8.9-9.6, viscosity of 14.3-15.3s (25 deg.C), solid content of 50-54%, and density of 1.22-1.24g/cm³The impregnating glue.

Further, in the step 1), a CRUSE high-definition digital input scanner is adopted to scan the natural textures of the tree seeds, and then an EPSON-SureColor B9080ROLAND-SOLJETPRO4-XF-640 digital printer is adopted to carry out digital printing, so that the required wood grain paper with the natural textures of the tree seeds is obtained.

The invention discloses high-simulation digital printing impregnated bond paper, the gum dipping amount is 150-²The pre-curing degree is 20-75%, the formaldehyde emission is not more than 1.5%, and the volatile matter content is 5.5-9.5%.

The invention discloses application of high-simulation digital printing impregnated bond paper in preparation of a plate.

Furthermore, the wood floor comprises a balance layer, a base material and a decorative paper layer which are sequentially arranged from bottom to top, the balance layer, the base material and the decorative paper layer are adhered together through high-temperature hot-pressing, the decorative paper layer is high-simulation digital printing impregnated bond paper, the wood pattern is scanned firstly to carry out digital printing treatment, base paper with wood grains is obtained, then impregnated and added with impregnated bond to prepare the wood floor, the natural grains of the wood can be presented, and the base material is a formaldehyde-free high-density fiberboard coated with formaldehyde-free modified isocyanate glue.

Compared with the prior art, the invention has the beneficial effects that:

the invention discloses a preparation method of high-simulation digital printing impregnated bond paper, a product and application, wherein the preparation method comprises the following steps: 1) preparing ink for digital printing, and performing simulation scanning and digital printing on the natural textures of the tree seeds to obtain wood-grain paper with the natural textures of the tree seeds; 2) preparing impregnating glue; 3) and (4) dipping. According to the invention, through a high-simulation spraying digital printing manufacturing process, the three-dimensional shape and natural and rich color effect of the surface of the board are endowed, natural textures of extremely expensive precious tree species such as dalbergia odorifera and teak are applied to the board including the wood floor, the natural and beautiful patterns of the precious tree species are presented on the surface of the board, the natural and beautiful patterns are reproduced, the self defects of natural wood are eliminated, the degree of perfection is reached, the pattern repetition is less, the environmental protection innovation of the whole floor industry is driven, the cultural taste of the product is improved, and the purpose of improving the added value is finally achieved(ii) a By adopting a digital printing technology, the plate making time is reduced, the plate roller loss is reduced, and the plate opening success rate is improved; the plate product made of the high-simulation digital printing impregnated bond paper has high simulation degree and definition, is wear-resistant and has two-in-one wood-grain paper, common wear-resistant paper does not need to be pressed and pasted, the gram weight of balance paper can be reduced, the whole process is ecological and environment-friendly, green and environment-friendly manufacturing is realized, waste is reduced, the environment is protected, the plate product has important practical significance for improving the product culture taste and increasing the product added value and the profitability, the production link processes are more centralized, the efficiency is higher, and the production cost is greatly reduced; the formaldehyde emission of the finished board is less than or equal to 0.124mg/m³The static bending strength is more than or equal to 35MPa, and the surface wear resistance is more than or equal to 4000 revolutions.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to clearly and clearly define the scope of the present invention.

A preparation method of high-simulation digital printing impregnated bond paper comprises the following steps:

1) preparing ink for digital printing, and performing simulation scanning and digital printing on the natural textures of the tree seeds to obtain wood-grain paper with the natural textures of the tree seeds;

the method comprises the following steps of (1) searching for samples of source-seeking and treasure tree species such as teak, Hainan Huanghua pears, sour branches and the like, and performing simulation scanning and digital printing according to the specific wood texture structure of the tree species; the invention preferably adopts a CRUSE high-definition digital input scanner to scan the wood, preferably adopts an EPSON-SureColor B9080ROLAND-SOLJETPRO4-XF-640 digital printer to digitally print, obtains the required wood grain paper with the natural tree grain, uses special printing ink to create rich and full-of-gas colors, still creates high-concentration printing quality at high speed, is durable and scratch-resistant, has almost no odor, can be quickly and consistently dried no matter the color or the clear-outline of pictures and characters, is green and environment-friendly, has no nickel compounds, and has the similarity between the base paper printing image and the solid wood of more than 95 percent;

ink color: red, yellow, blue and black;

2) preparation of impregnating glue

3) Impregnation

The wood grain paper with the tree species natural texture digitally printed by the printing ink is soaked in the dipping glue to obtain the required high-simulation digitally-printed dipping glue film paper which can present the tree species natural texture, and the simulation degree is more than or equal to 95%.

In the step 1), the ink comprises the following components in percentage by mass:

casein 5-10%

13 to 15 percent of organic pigment powder

4 to 15 percent of aqueous dispersant

Tea polyphenol 6-12%

3 to 7 percent of polyvinyl alcohol

0.5 to 1 percent of wetting defoaming agent

The balance of purified water;

the ink is prepared by the following steps:

according to the mass percentage, 5-10% of casein, 4-15% of water-based dispersant, 6-12% of tea polyphenol, 3-7% of polyvinyl alcohol and 0.5-1% of wetting defoamer are uniformly stirred, then 13-15% of organic pigment powder and the balance of purified water are added, and the mixture is ground until the fineness is not more than 0.18mm, so that the ink with the required solid content of 15-20% and the pH value of not less than 8.5 is obtained.

In the step 2), the impregnating glue comprises the following components in parts by weight:

14-16 parts of formaldehyde

40-65 parts of molecular sieve

1029E modifier 0.8-1.2 parts

35-38 parts of sodium hydroxide

5-18 parts of aluminum oxide

2-10 parts of white corundum

0.1 to 0.5 portion of triethanolamine

12-15 parts of melamine

5-8 parts of purified water;

the impregnating glue is prepared by the following steps:

according to parts by weight, 14-16 parts of formaldehyde, 40-65 parts of molecular sieve, 0.8-1.2 parts of 1029E modifier, 35-38 parts of sodium hydroxide, 5-18 parts of aluminum oxide, 2-10 parts of white corundum, 12-15 parts of melamine and 5-8 parts of purified water are stirred and uniformly mixed, and then heating, heat preservation, fogging point measurement and cooling are sequentially carried out;

controlling the temperature rise speed, wherein the temperature rise speed is not too fast or too slow, and the temperature rise time is 60min from 25 ℃ to 90 ℃; keeping the temperature at 90 deg.C, testing pH value after 30min, and testing pH value change every 20min before 0 deg.C fog point appears; testing the fog point after the heat preservation is started for 40min, and if the temperature is not at 0 ℃, testing the fog point at 18 ℃ once every 10 min; cooling to below 70 deg.C, adding triethanolamine, cooling to below 40 deg.C, discharging to obtain pH of 8.9-9.6, viscosity of 14.3-15.3s (25 deg.C), solid content of 50-54%, and density of 1.22-1.24g/cm³The impregnating glue.

The invention discloses high-simulation digital printing impregnated bond paper which is prepared by adopting a preparation method of the high-simulation digital printing impregnated bond paper, and the impregnation amount is 150-²The pre-curing degree is 20-75%, the formaldehyde emission is not more than 1.5%, and the volatile matter content is 5.5-9.5%.

The invention discloses application of high-simulation digital printing impregnated bond paper in preparation of boards, and further discloses application of the high-simulation digital printing impregnated bond paper in preparation of wood floors.

Example 1

The invention discloses an application of high-simulation digital printing impregnated bond paper in the preparation of a wood floor, which comprises a base material 2 and a veneer paper layer 1 arranged on the base material, wherein the veneer paper layer 1 is adhered together through high-temperature hot-pressing, the veneer paper layer 1 is the high-simulation digital printing impregnated bond paper, the base material with wood grains is obtained by scanning a tree seed pattern for digital printing treatment, then impregnating and adding impregnated bond water, the base material is prepared, the natural grains of the tree seed can be presented, the base material 2 is a formaldehyde-free high-density fiber board prepared by coating formaldehyde-free modified isocyanate glue, and further, in order to avoid upwarp of the floor, a balance layer 3 is preferably arranged below the base material 2, as shown in figure 1.

The preparation method of the wood floor comprises the following steps:

1) preparation of Formaldehyde-free modified isocyanate glue

The formaldehyde-free modified isocyanate glue is prepared by using diphenylmethane diisocyanate (MDI) as a main raw material and emulsifying the diphenylmethane diisocyanate (MDI) in water, wherein the solidifying point is less than 10 ℃, the boiling point is 330 ℃, and the density is 1.22g/cm³(25 ℃), viscosity 170 mPas (25 ℃);

2) preparation of the substrate

Cutting a soft and miscellaneous large material sheet with a proper size as a blank, applying formaldehyde-free modified isocyanate adhesive after the blank is subjected to hot grinding, adding 5-6kg of paraffin into each cubic meter of the blank, then sequentially drying, winnowing, paving, prepressing, continuously hot pressing, flying sawing, cooling, stacking, sanding, sawing into specifications and the like, and packaging and warehousing for later use;

the technological parameters of continuous hot pressing are as follows:

after the blank is glued and paraffin is added, the blank is laid on a continuous hot press, and after prepressing, the preformed blank is continuously conveyed forwards and is subjected to high-temperature hot pressing to form a plate blank. The continuous hot press is divided into five hot press zones, and the temperature of each hot press zone is as follows: the first zone is 225 ℃, the second zone is 220 ℃, the third zone is 215 ℃, the fourth zone is 200 ℃ and the fifth zone is 190 ℃, each hot pressing zone is divided into different hot pressing sections, the total number of the hot pressing sections is 45, and the hot pressing pressure of each section is detailed in the following table 1; the continuous hot pressing speed is 350mm/s, and the hot pressing time is 110 s.

TABLE 1

In order to avoid the problems that glue is difficult to cure, a sticky steel belt or a produced floor is easy to bubble and layer, the physical and chemical performance indexes are not high and the like, the fiber water content of the formaldehyde-free high-density fiberboard needs to be controlled to be 5-7%, preferably 5.7%, and can not be too low; the proper stripper is selected to reduce the condition of adhering a steel belt, control the opening of a panel blank preheating valve, increase the temperature of the panel blank, reduce the proportion of gasified moisture in the panel blank, reduce the steam pressure in the plate and reduce the occurrence of a bulge plate. The steel belt is checked every half hour, and the steel belt needs to be treated in time after the adhesion of the fibers is found;

the invention preferably adopts an imported abrasive belt with better quality, purchases and installs a polishing stick produced by Sufu Mashi, and meets the sanding quality requirement of the surface of the formaldehyde-free high-density fiberboard. Selecting sizing equipment and selecting an adding position and an adding mode according to the characteristics of the glue; the distance between a gluing position and a drying pipe is determined to be proper when gluing is carried out on a spray pipe through a process test, through experimental comparison, the position of a glue adding port is proper 3m before the glue adding port enters the drying pipe when a formaldehyde-free plate is produced, and the condition that no formaldehyde glue is gathered on the pipe wall of the spraying pipe to block the spraying pipe is easy to occur before the glue adding port is arranged³Preferably 40kg/m³。

3) Preparation of high-simulation digital printing impregnated bond paper

Preparing ink for digital printing:

adopting printing ink to carry out simulation scanning and digital printing on the natural textures of the tree seeds to obtain wood-grain paper with the natural textures of the tree seeds;

preparing impregnating glue:

the pH value of the impregnating glue is 8.9-9.6, the viscosity is 14.3-15.3s (25 ℃), the solid content is 50-54%, and the density is 1.22-1.24g/cm³The aluminum oxide does not precipitate and is uniformly suspended in the impregnating glue; the molecular sieve can adsorb formaldehyde, reduce peculiar smell and improve environmental protection;

dipping:

the method comprises the following steps of (1) immersing wood grain paper with precious tree species printed by ink in digital printing glue to obtain the required high-simulation digital printing impregnated bond paper, wherein the simulation degree is more than or equal to 95%, and the impregnation amount is standard: 80g of base paper needs to ensure 160-170% of gluing amount to ensure that the board is not curled; the storage environment is controlled at the indoor temperature of about 20 ℃, and the air humidity is kept between 45 and 55 percent; if the wood grain decorative paper is used as soon as possible after unpacking, a film is immediately covered when the wood grain decorative paper is not used up in production, four edges are covered by a heavy object, the wood grain decorative paper returns to a constant temperature warehouse for storage, if the curling is found to be serious, the four edges need to be immediately pressed by the heavy object, and the wood grain decorative paper is taken down when being used next time;

4) preparation of wood floor

Coating high-temperature hot-pressing glue between the base material obtained in the step 2) and the high-simulation digital printing impregnated bond paper obtained in the step 3), overlapping the base material and the high-simulation digital printing impregnated bond paper and placing the stacked base material and the high-simulation digital printing impregnated bond paper between an upper steel plate and a lower steel plate, and then performing hot-pressing, wherein the hot-pressing pressure is controlled to be 16-18MPa, the time is 28-31s, the temperature of the upper steel plate is 187-190 ℃, the temperature of the lower steel plate is 187-190 ℃, and the temperature difference between the upper steel plate and the lower steel plate is not more than 10 ℃; then, keeping the pressure at low temperature for 28-31s in a delayed manner, then performing linear cutting, trimming and width fixing, curing, milling, painting, waxing, packaging and warehousing for later use, wherein the trimmed materials after trimming and width fixing can be recycled; the curing effect is to fully cure the numerical value, balance the water content in the board, release the internal stress of the floor blank and prevent the finished floor from deforming.

The method for stacking the finished products after hot pressing is not exactly one of the main reasons for influencing the flatness of the board shape, and the solution is to store the melamine impregnated paper laminated board after hot pressing by adopting uniform and flat skids or trays.

The pre-curing degree of the high-simulation digital printing impregnated bond paper obtained in the step 3) needs to be controlled during hot pressing, the surface sealing performance is easily deteriorated due to the low pre-curing degree, the plate surface curing degree is poor, the scratch resistance and wear resistance indexes are reduced, and most of the bond is cured due to the high pre-curing degree and loses activity; during pressing, a part of glue can flow during high-temperature hot pressing, the formed glue layer is possibly insufficient in thickness, impregnated paper and a base material cannot be well adhered together, edge breakage and the like are prone to being caused subsequently, and therefore the pre-curing degree of the high-simulation digital printing impregnated film paper obtained in the step 3) is controlled to be 60% -75%.

In the hot pressing process, the pressing temperature can be properly reduced by 2-3 ℃, the pressing time is prolonged by 2-3s, the fluidity of the paper glue is ensured, and mist water can be properly sprayed on the board surface to improve the flexibility of the paper and delay the solidification of the paper glue.

The appearance quality of the wood floor is mainly controlled as follows:

various indexes of the sprayed paper are controlled to meet the requirements of customers (including fluidity, volatilization, sizing amount, sand content and the like); pinholes and glue spots are mostly caused by small glue flow or abnormal plate material and over-high laminating temperature; the surface porosity of the wood floor is mainly due to insufficient resin spreading at high temperature or low pressure, so that the pressure can be increased to the maximum, and the volatile content and the resin content of the paper are increased; the content of the modifier was increased to 0.5%, and in addition, it was checked whether the impregnated paper was stored too long or improperly.

And (3) performance testing:

the properties of the substrate 2 are shown in table 2.

TABLE 2

The indexes of the aldehyde-free high-density fiberboard meet the requirements of fiberboard for floor base materials (LY/T1611-2011), wherein the formaldehyde emission is less than or equal to 0.03mg/m3, and the actual measurement result is 0.008mg/m³。

The performance of the high-simulation digital printing decorative paper laminate wood floor is shown in Table 3, and meets the requirements of impregnated paper laminate wood floor (GB/T18102-2007), wherein the formaldehyde is less than or equal to 0.05mg/m³The static bending strength is more than or equal to 35MPa, the surface wear resistance is more than or equal to 4000 turns, and the actual measurement results are respectively 0.016mg/m³35.3MPa and 6000 turns.

TABLE 3

The invention researches and formulates a production process aiming at the characteristics of the formaldehyde-free modified isocyanate adhesive, determines the technological key points of proper hot pressing temperature, pressure, speed, fiber water content and the like through tests, and solves the problems that the formaldehyde-free modified isocyanate adhesive is difficult to cure, a bonded steel belt and a produced plate are easy to bubble and layer, the physical and chemical performance indexes are not high and the like in the actual production process. The optimized production process of the formaldehyde-free fiberboard substrate for the laminate flooring is an important way for improving the added value of products so as to keep the market space of the products and responds to the call of green and environmental protection.

The invention can solve the problems of the definition and the fidelity of the surface of the laminate flooring by developing digital printing and spraying wood grain decorative paper; the uniformity of the high-wear-resistance wood-grain paper spraying wear-resistant particles is researched to ensure the wear-resistant revolution of the product; the paper with higher definition and fidelity is manufactured by adopting a wear-resistant and wood-grain paper two-in-one process, so that the surface glossiness and the glue film saturation of the product are improved, and the pollution resistance is enhanced; aiming at the problems of the diameter grade and the accumulation of the precious trees, the high-simulation wood grain paper is developed, so that the surface definition and the fidelity of the laminate flooring can be improved, a large amount of plate roller opening cost is saved for a decorative paper factory, the order production capacity is very flexible, and the customized production requirement is met.

Researching the sand-light quality requirement on the surface of the formaldehyde-free fiberboard; the low-temperature time-delay hot-pressing process is researched, and the flatness of the plate shape is ensured as well as the solidification; researching the hot pressing parameters of the formaldehyde-free fiberboard and the coated wood grain paper; the production process of the high-simulation digital printing decorative paper laminate flooring is established, and a set of complete high-simulation digital printing decorative paper laminate flooring production technology is formed. The product produced by the manufacturing technology of the high-simulation digital printing decorative paper laminate wood floor has higher simulation degree and definition, is wear-resistant and integrates wood grain paper, does not need to be pressed with common wear-resistant paper, can reduce the gram weight of balance paper, reduces waste and protects the environment, has more concentrated production link processes, has higher efficiency, and greatly reduces the production cost.

The parts of the invention not specifically described can be realized by adopting the prior art, and the details are not described herein.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.