CN107263642B - A kind of antistatic wood decorative material and its manufacturing method - Google Patents

Abstract

The present invention provides a kind of manufacturing method of simply antistatic wood decorative material of Processes and apparatus, antistatic wood decorative material antistatic property made from this method is excellent, surface hardness is high, wear-resisting property is good, its surface resistivity is 1.0E+5 Ω -1.0E+6 Ω, volume resistivity is 1.0E+5 Ω cm-1.0E+6 Ω cm, build up of electrostatic charge is not easy in use process, cause dust suction, the bad phenomenons such as electric discharge, surface abrasion resistance reaches 6000 turns or more, it can be widely applied to antistatic property, the high-grade office building that wear-resisting property has higher requirements, the incrustation in the places such as intelligent office block.The manufacturing method, including substrate prepare, and softening processing is dried, antistatic resin preparation, single-steeping, predrying, high temperature compression processing, double-steeping, redrying and etc..Antistatic agent, anti-wear agent and other auxiliary agents etc. after evenly mixing, are evenly spread to low molecular weight dipping and are formed in melamine resin by the obtained antistatic resin.

Description

A kind of antistatic wood decoration material and its manufacturing method

technical field

The invention relates to a novel wood decoration material with antistatic function and a manufacturing method thereof, belonging to the field of wood composite material manufacture.

Background technique

The natural patterns and natural colors of wooden decorative materials can create a relaxed, cheerful and elegant atmosphere, and have a strong affinity with human beings. It has always been one of the decorative materials that people must choose.

The existing wood decoration materials mainly include decorative veneer, artificial veneer, wood-based panels, wood lines and wood floors, among which decorative wood-based panels and wood floors have the most varieties and colors and are the most widely used. Wood material is a poor conductor of electricity, and it is easy to generate charge accumulation on the surface, resulting in static electricity. Especially after the surface of the material is treated with paint coating or impregnated paper veneer, the static electricity phenomenon is more serious.

Static electricity is a disadvantage in the processing and use of wood materials. The accumulation of static electricity will generate a high potential on the surface of the object. When the human body or other low-potential conductors approach, discharge will occur. In severe cases, it will not only damage the quality of the product, but also cause great economic losses, and may even endanger personal and Equipment security.

The electrostatic discharge voltage that the human body can feel is generally between 3000-5000V, and the electrostatic discharge voltage that causes electronic equipment to malfunction or damage is only a few hundred volts. Permanent damage to these devices may be caused by electrostatic discharge. As a result, electrostatic hazards are often difficult to detect, but can result in severe damage to products and significant economic losses. In the 1970s, the harmful effect of electrostatic discharge was recognized. With the development of science and technology, electronic components are more and more sensitive to electrostatic discharge, and the loss caused by electrostatic discharge can reach more than several million US dollars every year. Therefore, the packaging and transportation of electronic products and the anti-static and anti-interference of the building indoor environment have become an important guarantee for economic development in the high-tech era. As one of the performance indicators of packaging materials and building interior decoration materials, antistatic performance has attracted more and more attention and attention.

Compared with the more mature polymer functional materials, the research on antistatic wood composites started late. Since the late 1980s, many domestic and foreign scholars have conducted some research on how to improve the electrical conductivity of wood-based composite materials. In order to protect against static electricity, a conductive material coated with anti-static paint is usually arranged on the surface of the material. However, due to its long-term use, the conductive material is easily worn, so that the material loses its antistatic effect. Therefore, wood antistatic materials that have been put into large-scale practical applications are rare so far.

Therefore, the development of antistatic wood composite materials is of great significance for wood processing, expanding the use of wood materials, and increasing the added value of wood materials.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a manufacturing method of antistatic wooden decorative material with simple process and equipment. and other undesirable phenomena, the antistatic effect is long-lasting, thereby effectively avoiding the potential safety hazards caused by static electricity, and the obtained quality decorative material has high surface hardness and good wear resistance, and can be widely used in antistatic properties and wear resistance. Surface decoration of high-end office buildings, intelligent office buildings and other places with high requirements.

A manufacturing method of an antistatic wood decorative material provided by the present invention includes the following steps: substrate preparation, softening treatment, drying treatment, antistatic resin preparation, primary dipping, pre-drying, medium-high temperature compression treatment, and secondary dipping , secondary drying, cutting, quality inspection and grading, packaging, storage.

The preparation of the base material is mainly to prepare a veneer with a thickness of 2.0-6.0 mm from fast-growing artificial forests (poplar, fir, eucalyptus, etc.) by rotary cutting or slicing.

The softening treatment mainly uses a softening device to roll the tight surface of the over-rotated or sliced veneer to eliminate the internal stress caused by the elastic surface of the veneer, make the cracks on both sides of the veneer consistent, and ensure impregnation. At the same time, the resin can penetrate evenly and improve the bulk density of the veneer.

The softening device in the softening treatment is mainly composed of toothed rollers, conveying steel belts, synchronous chains and motors. The toothed roller is located just above the conveying steel belt, and the distance from the conveying steel belt can be adjusted according to the thickness of the veneer. The tight surface of the veneer faces the toothed roller, and is placed on the transmission steel belt. The motor drives the toothed roller and the transmission steel belt to move through the synchronous chain, so as to realize the softening of the tight surface of the veneer.

The drying treatment refers to using a traditional drying process to dry the veneer to a moisture content of 6-10%, which is convenient for subsequent dipping treatment.

The preparation of the antistatic resin is mainly through air blowing and mechanical stirring treatment. After mixing powders such as antistatic agent, anti-wear agent and other auxiliary agents, they are uniformly dispersed into artificially synthesized low molecular weight impregnating resin. An antistatic resin impregnating solution with uniform dispersion and stable performance was obtained.

The artificially synthesized low molecular weight impregnating resin in the preparation of the antistatic resin is mainly artificially synthesized melamine resin, the resin solid content is 25-30%, and is suitable for the impregnation process of fast-growing wood veneers.

The antistatic agent in the preparation of the antistatic resin mainly includes one or more of graphite powder, metal powder (nickel, copper, etc.), and conductive mica powder. The particle size is 250-400 mesh, and the addition amount is 1wt%-15wt% of the resin matrix.

The wear-resistant agent in the preparation of the antistatic resin is mainly one or a combination of one or more of silicon dioxide, aluminum oxide, aluminum hydroxide and silicon carbide, preferably silicon dioxide and aluminum oxide. The composite wear-resistant agent obtained by compounding with a mass ratio of 1:1 has a particle size of 150-250 mesh. The addition amount is 1wt%-10wt% of the resin matrix. The addition of the anti-wear agent can improve the wear resistance of the surface of the antistatic material prepared.

The other auxiliaries in the preparation of the antistatic resin are mainly composite auxiliaries obtained by compounding titanate coupling agent, aluminate coupling agent and silane coupling agent in a mass ratio of 1:1:1. The addition amount is 1wt%-5wt% of the resin matrix. The addition of composite additives can improve the dispersion of the added powder in the resin matrix, help to improve the mechanical and electrical properties of the antistatic material, and make the product have excellent weather resistance, water resistance and oil resistance. , Excellent surface gloss, long service life.

In the one-time dipping, the veneer is placed in a dipping tank filled with an antistatic resin solution, treated under normal pressure for 20-30 minutes, and taken out after dipping.

The pre-drying is to pass the wet veneer after one dipping through a dryer and dry it at a temperature of 80-140 ° C, so that the board surface is slightly sticky to the touch. The purpose is to make the electrostatic resin in the subsequent medium and high temperature compression treatment. Fast curing without contaminating the platen surface of the heat press due to resin overflow.

The medium and high temperature compression treatment mainly refers to putting the pre-dried veneer into a flat plate hot press for high temperature compression, the hot plate temperature is 140-150°C, the compression time is 5-10min, and the veneer compression rate is 30-50%. Remove and cool to room temperature. The purpose is to solidify the additives in the veneer and increase the density of the veneer, thereby improving the mechanical and electrical properties of the material and prolonging the service life of the material.

The said secondary impregnation is to immerse the veneer after the medium and high temperature compression treatment into the impregnating resin again, so that the impregnating resin is completely filled on the surface of the material, so as to prevent the resin on the surface of the material from being lost due to contact with the pressing plate of the hot press. The surface resin is pre-cured during hot pressing, which is not conducive to secondary processing and application.

In the secondary drying, the wet veneer after the secondary impregnation is passed through a dryer and dried again at a temperature of 80-140° C. until the impregnated resin is 50-150% of the weight of the substrate.

The antistatic wood decorative material after secondary drying can be cut, quality inspected and graded, packaged and stored. Cutting, quality inspection and grading, packaging and storage, etc., all use existing methods, processes and equipment.

In short, the steps of a method for manufacturing an antistatic wooden decorative material provided by the present invention are as follows:

The first step: the fast-growing artificial forest (poplar, fir, eucalyptus, etc.) is prepared by rotary cutting or slicing to obtain a veneer with a thickness of 2.0-6.0mm;

Step 2: Roll the veneer on the tight surface of the veneer through a special softening device to eliminate the internal stress caused by the elastic surface of the veneer, make the cracks on both sides of the veneer consistent, and ensure that the resin can penetrate evenly during impregnation;

The third step: the softened veneer is dried by traditional drying process, and the moisture content is controlled at 6-10%;

Step 4: After uniformly mixing the antistatic agent, anti-wear agent and other auxiliary agents, it is uniformly dispersed into the artificially synthesized melamine resin for impregnation by air blowing and mechanical stirring to obtain an antistatic agent with uniform dispersion and stable performance. Electrostatic resin impregnation solution;

Step 5: Pass the dried veneer through the dipping tank to make it fully immersed in the low molecular weight antistatic resin; pass the soaked wet veneer through a dryer, and pre-dry it at a temperature of 80-140 ℃ to make the board surface Slightly sticky when touched;

Step 6: The dipped pre-dried veneer is compressed at medium and high temperature by a flat plate hot press. Board density, so that antistatic agent, wear-resistant agent and other materials are fixed in the veneer, and it is not easy to lose;

Step 7: Immerse the compacted veneer into the antistatic resin again, so that the resin is completely filled on the surface of the material, preventing the resin from being lost on the surface of the material due to contact with the pressing plate of the hot press, and preventing the surface resin from being damaged during hot pressing. Pre-curing is not conducive to secondary processing and application;

Step 8: Put the wet veneer after the secondary impregnation into the dryer to dry again. The degree of drying at this time depends on the resin content required for the secondary application of the material. The resin content can be 50-50% of the weight of the substrate. 150%;

The ninth step: the dried antistatic wood decorative materials can be cut, quality inspected and graded, packaged and stored. Cutting, quality inspection and grading, packaging and storage, etc., all use existing methods, processes and equipment.

The present invention also provides an antistatic wood decoration material, which is prepared according to the above method, the surface resistivity is 1.0E+5Ω-1.0E+6Ω, and the volume resistivity is 1.0E+5Ω·cm-1.0E +6Ω·cm.

The beneficial effects of the present invention: the antistatic wooden decorative material produced by the above method has excellent antistatic performance and wear resistance, its surface resistivity is 1.0E+5Ω-1.0E+6Ω, and its volume resistivity is 1.0E+5Ω· cm -1.0E+6Ω·cm, it is not easy to accumulate static charge during use, and the antistatic effect is lasting; the wear resistance of the material surface reaches more than 6000 rpm, and other physical and mechanical properties meet the corresponding national standards. The invention has rich raw material sources, no need for finishing, simple preparation process and equipment, easy control of process conditions, strong operability and low cost, and can be widely used in high-end office buildings, intelligent The surface decoration of office buildings and other places can effectively improve the added value of fast-growing wood and broaden its application range.

Description of drawings

Fig. 1 is the process flow diagram of the present invention;

FIG. 2 is a schematic diagram of a softening device in the process flow provided by the present invention.

In the figure, 1 is the driven roller, 2 is the conveyor belt, 3 is the support frame, 4 is the conveyor belt roller driving chain, 5 is the veneer before softening, 6 is the nailing roller, 7 is the nailing roller driving chain, 8 is the softening For the rear veneer, 9 is the driving roller, 10 is the driving chain of the driving roller, and 11 is the motor.

Detailed ways

The specific features and technical means of the present invention are further described below with reference to the embodiments and the accompanying drawings.

Referring to FIG. 1, the manufacturing method of the antistatic wooden decorative material of the present invention includes substrate preparation, softening treatment, drying treatment, antistatic resin preparation, primary dipping, pre-drying, medium and high temperature compression treatment, secondary dipping, and secondary dipping. Drying, cutting, quality inspection and grading, packaging, storage. The present invention also provides an antistatic wood decorative material manufactured by the above manufacturing method.

The following describes in detail with reference to specific embodiments.

Example 1

An antistatic poplar veneer decorative material is manufactured through the following steps:

Step 1: Spin the fast-growing poplar into veneers with a thickness of 4.0mm;

The second step: use a softening device to roll the tight surface of the poplar veneer to eliminate internal stress, so that the cracks on both sides of the veneer are consistent, which is conducive to the uniform penetration of the resin;

The third step: drying the softened veneer to make the moisture content 10%;

The fourth step: compound the 300-mesh graphite powder, 200-mesh silicon dioxide and aluminum oxide in a mass ratio of 1:1 to obtain a composite wear-resistant agent, a titanate coupling agent, an aluminate coupling agent, and a silane coupling agent. The compound adjuvant obtained by compounding the joint agent in a mass ratio of 1:1:1 is evenly mixed, and is uniformly dispersed into the melamine resin with a solid content of 30% by air blowing and mechanical stirring to obtain a uniformly dispersed and stable performance. Antistatic resin impregnation solution. The additive amounts of graphite powder, composite wear-resistant agent and composite auxiliary agent are 10wt%, 5wt%, and 5wt% of the resin matrix, respectively;

Step 5: Pass the dried veneer through the dipping tank to make it fully immersed in the low molecular weight antistatic resin; pass the soaked wet veneer through a dryer and pre-dry it at a temperature of 140°C, so that the surface of the board can be touched by hand. It is slightly sticky to prevent the surface of the plate from contaminating the surface of the hot press due to resin overflow;

Step 6: The dipped pre-dried veneer is compressed at medium and high temperature through a flat plate hot press. The temperature of the hot plate is 140 ° C, the compression time is 8 minutes, and the compression rate of the veneer is 40%. Increase the density of the veneer to make antistatic The materials such as agent and wear-resistant agent are fixed in the veneer and are not easy to be lost;

Step 7: Immerse the compacted veneer into the antistatic resin again, so that the resin is completely filled on the surface of the material, preventing the resin from being lost on the surface of the material due to contact with the pressing plate of the hot press, and preventing the surface resin from being damaged during hot pressing. pre-cured;

The eighth step: the wet veneer after the second impregnation is put into a dryer to be dried again, so that the resin content is 80% of the weight of the base material.

The ninth step: the dried antistatic wood decorative materials can be cut, quality inspected and graded, packaged and stored using existing methods, processes and equipment.

The antistatic poplar veneer decorative material produced by the method has a surface resistivity of 1.0E+5Ω-1.0E+6Ω, a volume resistivity of 1.0E+5Ω·cm -1.0E+6Ω·cm, and the wear resistance reaches 1.0E+5Ω-1.0E+6Ω. Above 6000 rpm, other physical and mechanical properties meet the corresponding national standards. It can be used as a veneer material for wood-based panels such as particleboard, fiberboard, and blockboard.

If the addition amount of graphite powder, composite wear-resistant agent and composite auxiliary agent in Example 1 is changed relative to the resin matrix, but the addition amount of graphite powder is 1-15wt%, and the addition amount of composite wear-resistant agent is 1-10wt% %, the addition amount of the composite additives is 1-5wt%, and other parameters remain unchanged, and the corresponding antistatic poplar veneer decorative material is obtained, and its surface resistivity, volume resistivity, wear resistance, etc. are basically the same as those in Example 1. Similarly, the surface resistivity is 1.0E+5Ω-1.0E+6Ω, the volume resistivity is 1.0E+5Ω·cm -1.0E+6Ω·cm, and the wear resistance reaches 7000-8000 rpm.

Example 2

An antistatic eucalyptus veneer decorative material is manufactured through the following steps:

The first step: slicing the fast-growing eucalyptus wood into veneers with a thickness of 6.0mm;

The second step: use a softening device to roll the tight surface of the poplar veneer to eliminate internal stress, so that the cracks on both sides of the veneer are consistent, which is conducive to the uniform penetration of the resin;

The third step: the softened veneer is dried by traditional drying process, and the moisture content is controlled at 8%;

The fourth step: compound the 250-mesh metal powder (nickel powder or copper powder), 200-mesh silicon dioxide and aluminum oxide in a mass ratio of 1:1 to obtain a composite wear-resistant agent, titanate coupling agent, and aluminate The compound auxiliaries obtained by compounding the ester coupling agent and the silane coupling agent in a mass ratio of 1:1:1 are evenly mixed, and are uniformly dispersed into the melamine resin with a solid content of 25% by air blowing and mechanical stirring. An antistatic resin impregnating solution with uniform dispersion and stable performance was obtained. The additive amounts of metal powder, composite anti-wear agent and composite auxiliary are 10wt%, 10wt% and 5wt% of the resin matrix, respectively.

Step 5: Pass the dried veneer through the dipping tank to make it fully immersed in the low molecular weight antistatic resin; pass the soaked wet veneer through a dryer and pre-dry it at a temperature of 140°C, so that the surface of the board can be touched by hand. It is slightly sticky to prevent the surface of the plate from contaminating the surface of the hot press due to resin overflow.

Step 6: The dipped pre-dried veneer is compressed at medium and high temperature through a flat plate hot press. The temperature of the hot plate is 150 ° C, the compression time is 10 minutes, the veneer compression rate is 50%, and the density of the veneer is increased to make antistatic The materials such as agent and wear-resistant agent are fixed in the veneer and are not easy to be lost;

Step 7: Immerse the compacted veneer into the antistatic resin again, so that the resin is completely filled on the surface of the material, preventing the resin from being lost on the surface of the material due to contact with the pressing plate of the hot press, and preventing the surface resin from being damaged during hot pressing. Pre-cured.

The eighth step: the wet veneer after the second impregnation is put into a dryer to be dried again, so that the resin content is 80% of the weight of the base material.

The ninth step: the dried antistatic wood decorative materials can be cut, quality inspected and graded, packaged and stored using existing methods, processes and equipment.

The antistatic eucalyptus veneer decorative material produced by the method has a surface resistivity of 1.0E+5Ω-1.0E+6Ω, a volume resistivity of 1.0E+5Ω·cm -1.0E+6Ω·cm, and the wear resistance reaches 1.0E+5Ω-1.0E+6Ω. Above 9000 rpm, other physical and mechanical properties meet the corresponding national standards, and can be used as the surface material of solid wood composite flooring, laminate flooring and other products.

If the addition amount of metal powder, composite anti-wear agent and composite auxiliary agent in Example 2 is changed relative to the resin matrix, but the addition amount of metal powder is 1-15wt%, and the addition amount of composite wear-resistant agent is 1-10wt% %, the addition amount of the composite additives is 1-5wt%, and other parameters are unchanged, and the corresponding antistatic eucalyptus veneer decorative material is obtained, and its surface resistivity, volume resistivity, wear resistance and other basic example 2 are similar. , the surface resistivity is 1.0E+5Ω-1.0E+6Ω, the volume resistivity is 1.0E+5Ω·cm -1.0E+6Ω·cm, and the wear resistance reaches 10000-11000 rpm.

If only the antistatic agent in Example 1 is changed to conductive mica powder, and other parameters remain unchanged, the corresponding antistatic poplar veneer decorative material is obtained, and its surface resistivity, volume resistivity, and wear resistance are also the same as those in the example. 1 is basically the same.

If only the antistatic agent in Example 1 is changed to any two compound antistatic agents that are uniformly mixed by mass ratio of 1:1 among graphite powder, metal powder and conductive mica powder, other parameters remain unchanged, and the corresponding The surface resistivity, volume resistivity and wear resistance of the antistatic poplar veneer decorative material are basically the same as those in Example 1.

If only the composite wear-resistant agent in Example 2 is changed to a combination of silicon dioxide and aluminum hydroxide in a mass ratio of 1:1, or a combination of silicon dioxide and silicon carbide in a mass ratio of 1:1, or aluminum hydroxide and three Aluminium oxide is combined in a mass ratio of 1:1, or aluminum hydroxide and silicon carbide are combined in a mass ratio of 1:1, or aluminum oxide and silicon carbide are combined in a mass ratio of 1:1, and other parameters remain unchanged, and the corresponding The surface resistivity, volume resistivity and wear resistance of the antistatic eucalyptus veneer decorative material are basically the same as those in Example 2.

Claims (5)

1. a kind of antistatic wood decorative material manufacturing method, it is characterized in that: steps are as follows:

Step 1: the veneer with a thickness of 2.0-6.0mm is made by rotary-cut or slicing for the artificial material of fast-growing；

Step 2: carrying out roller stone roller using tight face of the softening device to veneer, internal stress caused by the elastic face of veneer is eliminated, veneer is made The crackle on two sides is consistent；The softening device includes grinding for transmitting the conveyer belt of veneer, above conveyer belt for roller The discaling roll of the rotation of veneer, conveyer belt movement speed are equal with the linear velocity of discaling roll；

Step 3: veneer is dried, moisture content is controlled in 6-10%；

Step 4: after evenly mixing by antistatic agent, anti-wear agent and other auxiliary agents, evenly spreading to low molecular weight dipping trimerization In melamine resin, antistatic resin dipping solution is made；

It is compound that other auxiliary agents are that titanate coupling agent, aluminate coupling agent, silane coupling agent are compounded with mass ratio 1:1:1 Type auxiliary agent；

Step 5: immersing it in antistatic resin dipping solution by dried veneer by steeping vat；It is taken out after being impregnated with； By the wet veneer being impregnated with by drying machine, predrying is carried out at 80-140 DEG C of temperature, and plate face hand is made to glue hand slightly when touching；

High temperature compression, hot plate temperature 140-150 are carried out by flat-bed press step 6: the good veneer of predrying will be impregnated DEG C, compression time 5-10min, veneer compression ratio is 30-50%；

Step 7: the veneer after densification is again dipped into antistatic resin dipping solution, fill resin completely in material table Face；

It is dried again step 8: the wet veneer after double-steeping is put into drying machine, after dry, resin content is substrate weight 50-150%；

Wherein, antistatic agent is one of graphite powder, metal powder, conductive mica powder or several；Partial size is 250-400 mesh, Additive amount is the 1wt%-15wt% of resin matrix；

Anti-wear agent is one or more of silica, aluminum oxide, aluminium hydroxide, silicon carbide, partial size 150-250 Mesh, additive amount are the 1wt%-10wt% of resin matrix；

Antistatic wood decorative material surface resistivity obtained is 1.0E+5 Ω -1.0E+6 Ω, volume resistivity 1.0E+5 Ω·cm -1.0 E+6Ω·cm。

2. antistatic wood decorative material manufacturing method as described in claim 1, it is characterized in that: anti-wear agent be silica with The compound anti-wear agent that aluminum oxide is compounded with mass ratio 1:1.

3. antistatic wood decorative material manufacturing method as described in claim 1, it is characterized in that: compound additive dosage is The 1wt%-5wt% of resin matrix.

4. antistatic wood decorative material manufacturing method as described in claim 1, it is characterized in that: 300 mesh graphite powders are resisted quiet Electric agent, 200 mesh silica compound to obtain compound anti-wear agent with mass ratio 1:1 with aluminum oxide and compound auxiliary agent is equal Even mixing evenly spreads in the melamine resin that solid content is 30%, antistatic resin dipping solution is made；Graphite powder is answered The additive amount of mould assembly anti-wear agent and compound auxiliary agent is respectively 10wt%, 5wt%, 5wt% of resin matrix.

5. antistatic wood decorative material manufacturing method as described in claim 1, it is characterized in that: 250 mesh metal powders are resisted quiet Electric agent, 200 mesh silica compound to obtain compound anti-wear agent with mass ratio 1:1 with aluminum oxide and compound auxiliary agent is equal Even mixing evenly spreads in the melamine resin that solid content is 25%, antistatic resin dipping solution is made；Metal powder is answered The additive amount of mould assembly anti-wear agent and compound auxiliary agent is respectively 10wt%, 5wt%, 5wt% of resin matrix.