CN109591410B

CN109591410B - Multilayer composite board

Info

Publication number: CN109591410B
Application number: CN201811319164.5A
Authority: CN
Inventors: 唐道远; 唐圣卫
Original assignee: Anhui Sentai Wpc Group Co ltd
Current assignee: Anhui Sentai Wpc Group Co ltd
Priority date: 2018-11-07
Filing date: 2018-11-07
Publication date: 2020-06-30
Anticipated expiration: 2038-11-07
Also published as: CN109591410A

Abstract

The invention relates to the technical field of PVC skinning foaming plates, in particular to a multilayer composite plate, which at least comprises two PVC skinning foaming plates and an adhesive layer, wherein the adhesive layer is formed between the PVC skinning foaming plates and is bonded to form the multilayer composite plate through the bonding action of the adhesive layer, so that compared with the single PVC foaming plate, the multilayer composite plate provided by the application has the advantages that the nail holding force of the multilayer composite plate is obviously enhanced by utilizing the superposed skinning layers, the multilayer composite plate not only has the performances of fire prevention, sound insulation, shock absorption and the like of the PVC foaming plates, but also enhances the connection performance of the PVC skinning foaming plates as a connecting piece, the adhesive layer between the multilayer PVC foaming plates not only plays a role, the formed adhesive layer has certain elasticity, and when a screw passes through the adhesive layer, the joint of the adhesive layer and the screw can generate a reverse acting force for extruding the screw, thereby further improving the nail-holding force of the multilayer composite board.

Description

Multilayer composite board

The technical field is as follows:

the invention relates to the technical field of PVC skinning foaming boards, in particular to a multilayer composite board.

Background art:

PVC foam boards, also known as french and andes, are chemically made of polyvinyl chloride (PVC), and are therefore also known as PVC foam boards. The board is widely applied to passenger cars, train carriages ceilings, box core layers, interior decoration boards, building outer wall boards, interior decoration boards, offices, houses, public place building compartments, commercial decoration frames, dust-free room boards, ceiling boards, screen printing, computer lettering, advertising marks, display boards, sign board album boards and other industries, chemical anticorrosion projects, thermoformed parts, cold storage boards, special cold insulation projects, environmental protection board molds, sports equipment, breeding materials, seashore damp-proof facilities, waterproof materials, art designing materials and various light partition boards to replace glass ceilings and the like. The PVC foaming board paint series has the advantages of easy construction on PVC large boards, strong adhesive force, high hardness, good sun resistance, no zigzag cracks in cutting and drilling PVC boards after paint spraying, excellent performance, easy spraying, low cost, single component meeting ROHS environmental protection, and good decoration and protection functions on the surfaces of paint coating PVC bathroom cabinets and PVC bathroom cabinets. In the PVC foaming product, the purpose of adding the ultra-high molecular weight polymer is as follows: firstly, the plasticization of PVC is promoted; secondly, in order to improve the melt strength of the PVC foaming material and prevent the combination of bubbles, so as to obtain a product which is foamed uniformly; thirdly, the good fluidity of the melt is ensured, so that the product with good appearance is obtained. Because different foaming product manufacturers have different products and different equipment, process, raw materials and lubricating systems, foaming regulators with different properties are developed to meet different requirements of users.

The plastic foaming and forming process includes three steps: the formation of bubble nuclei, the expansion of the bubble nuclei and the solidification of the bubbles. For PVC foamed sheets with the addition of chemical blowing agents, the expansion of the cell nuclei has a decisive influence on the quality of the foamed sheet. PVC belongs to straight chain molecules, the molecular chain is short, the melt strength is low, the melt is not enough to cover bubbles in the process of expanding bubble cores into bubbles, gas is easy to overflow and merge into large bubbles, and the product quality of the foamed sheet is reduced.

Among the prior art, when using PVC skinning foaming board, because there is the skinning at the both ends face of PVC skinning foaming board to make PVC skinning foaming board possess certain intensity, foam polyvinyl chloride between two skinning layers provides certain syllable-dividing, shock attenuation and support performance for PVC skinning foaming board, but when PVC skinning foaming board used as the connecting piece, the nail-holding power between the connecting piece was less, and there is the connectivity between the connecting piece low, connects the problem of not fastening.

The invention content is as follows:

the invention overcomes the defects of the prior art and provides a multilayer composite board.

The technical problem to be solved by the invention is realized by adopting the following technical scheme: the multilayer composite board at least comprises two PVC skinning foaming boards and an adhesive layer, wherein the adhesive layer is formed between the PVC skinning foaming boards and is bonded to form the multilayer composite board through the adhesive effect of the adhesive layer.

Preferably, the PVC skinning foaming board includes PVC foaming sheet layer and is located the skinning layer of PVC foaming sheet layer upper and lower surface, the adhesive linkage coats between adjacent skinning layer.

Preferably, the bonding layer has a thickness of 0.1-0.5 mm.

Preferably, the adhesive layer is formed by coating acrylic glue.

Preferably, the PVC skinning foaming plate comprises the following components in parts by weight:

60-75 parts of polyvinyl chloride resin powder, 30-40 parts of modified wood wool, 1-2 parts of a stabilizer, 1-2 parts of a lubricant and 0.1-2 parts of a foaming agent;

preferably, the stabilizer is a composite lead stabilizer; the foaming agent consists of a yellow foaming agent and a white foaming agent, wherein the yellow foaming agent is azodicarbonamide, azodiisobutyronitrile, a nitroso foaming agent or a hydrazide foaming agent; the white foaming agent is sodium bicarbonate, ammonium carbonate or azide, and the mass ratio of the yellow foaming agent to the white foaming agent is 1: 1-1: 4; the lubricant is stearic acid, stearate, a stearic alcohol compound, stearic acid amides, fatty acid metal soaps, polyethylene wax, paraffin or oxidized polyethylene.

Preferably, the preparation method of the PVC leather-binding plate comprises the steps of mixing the raw materials according to the formula, processing by adopting conical double-screw and three-roller processing equipment, wherein the rotating speed of a screw is 10-25 revolutions per minute, the processing temperature is 130-190 ℃, the oil temperature of the screw is 70-120 ℃, the temperature of a die is 150-180 ℃, the temperature of a die lip is 130-180 ℃, and cutting after three-roller cooling and shaping and tension elimination.

The modified wood wool is prepared through the following steps:

(1) waste and leftover wood is cut into wood filaments along the fiber direction, the length of the wood filaments is 10-15 mm, and the cross section area of the wood filaments is 2-4 mm²；

(2) Baking the wood wool obtained by the step (1) at the temperature of 20-35 ℃ for less than 15% of water content to form coke-dried wood wool;

(3) preparing a wear-resistant elastic glue solution:

the components of the wear-resistant elastic glue solution are as follows: 15-25% of ethyl acrylate, 10-15% of methyl methacrylate, 15-20% of polyurethane, 5-10% of alumina particles with the particle size of 10-40 um, 3-8% of alumina particles with the particle size of 200-400 um and the balance of deionized water;

the preparation method of the wear-resistant elastic glue solution comprises the following steps: fully and uniformly mixing ethyl acrylate, polyurethane and methyl methacrylate, then putting alumina particles with different particles into the solution, and vulcanizing at the temperature of 145-160 ℃ and under the pressure of 15-20Mpa for 3-4 min to obtain the wear-resistant elastic adhesive solution;

(4) and (3) putting the dried wood wool in the step (2) into the wear-resistant elastic glue solution prepared in the step (3), so that the wear-resistant elastic glue solution is uniformly attached to the surface of the dried wood wool, and drying to form an elastic glue layer with the thickness of 0.1-0.5 mm.

The wood wool to be dried firstly enters a microwave drying box, and 50-60% of water is removed from the material through microwave; the microwave frequency of the microwave drying box is 1100-1400 MHz, and the temperature of the wood wool reaches 21 ℃ after microwave dehydration; the materials dehydrated by the microwaves enter a drying room, and are sequentially dried in the drying room at three different temperature areas of 21-25 ℃, 25-30 ℃ and 30-35 ℃, wherein the total drying time is 4-6 hours.

Compared with the prior art, the beneficial effect of this application is:

1. compared with a single PVC (polyvinyl chloride) foaming plate, the multi-layer composite plate provided by the application has the advantages that the nail holding force of the multi-layer composite plate is obviously enhanced by utilizing the superposed skinning layers, so that the multi-layer composite plate not only has the performances of fire prevention, sound insulation, shock absorption and the like of the PVC foaming plate, but also enhances the connection performance of the PVC foaming plate as a connecting piece, the bonding layer between the multi-layer PVC foaming plates not only plays a role in bonding, the formed bonding layer has certain elasticity, when a screw passes through the bonding layer, the reverse acting force of an extrusion screw can be generated at the joint of the bonding layer and the screw, and the nail holding force of the multi-layer composite plate is;

2. in the application, the microwave heating is instant heating, so that the wood wool reaches a certain temperature before entering the drying room, the time is saved, the efficiency is improved, the microwave heating is three-dimensional heating, the internal and external temperatures of the material entering the drying room are uniform, the problem that the internal water cannot be discharged when the wood wool enters the drying room independently is solved, the water content in the wood wool is ensured to be lower than 15%, and the phenomenon of external drying and internal wetting is avoided;

3. according to the application, the wood wool subjected to baking treatment can be well combined with the wear-resistant elastic glue solution, the wear-resistant elastic glue solution can well permeate into the wood wool, so that the combination strength between the wear-resistant elastic glue solution and the wood wool is enhanced, the modified wood wool has certain toughness and elasticity, the modified wood wool is used for preparing the PVC skinning foam board, the modified wood wool in the PVC skinning foam board is randomly and uniformly arranged in the PVC foam board, the mechanical property of the PVC skinning foam board is greatly improved by the modified wood wool extending in any direction, the PVC skinning foam board has better toughness, and when the PVC skinning foam board is subjected to excessive stress and fails, the modified wood wool distributed in the PVC skinning foam board also plays a role in connection, so that the PVC skinning foam board is prevented from being cracked and injuring people and objects;

4. in this application, in the preparation modified wood wool in-process, the aluminium oxide granule that the particle diameter of interpolation is 10 ~ 40um and the aluminium oxide granule that the particle diameter is 200 ~ 400um, be homodisperse in the elastic colloid intraformational of modified wood wool, when the screw is embedded into PVC skinning foaming board, the surface of screw is not merely with PVC skinning foaming board effect, the modified wood wool of its inside distribution is because the density of increase PVC skinning foaming board, strengthen its holding power, the surface when the screw is simultaneously with the effect of modified wood wool, the principle of strengthening its holding power includes:

(1): the outer surface of the screw acts with the elastic colloid layer of the modified wood wool, and the elastic colloid layer has certain elasticity and extrudes the screw to enhance the nail holding force of the screw;

(2) alumina particles distributed on the elastic colloid layer are randomly clamped on the surface of the screw, and the alumina particles with different sizes can ensure that the extrusion forces of the elastic colloid at different positions on the screw are different, so that large and small alternative acting forces are formed to act on the surface of the screw, and the nail holding force of the PVC skinning foaming plate is greatly enhanced;

(3): when the aluminum oxide particles embedded on the surface of the screw are greatly acted by the screw, the aluminum oxide particles can be separated from the surface of the elastic colloid layer, so that the outer surface of the screw forms a layer of high and low uneven surface which can enhance the friction force between the aluminum oxide particles and the elastic colloid layer, thereby enhancing the nail holding force of the aluminum oxide particles;

(4): when the screw penetrates through the modified wood wool, the wood wool can provide extrusion force for the screw along the radial direction of the screw, so that the nail holding force of the PVC skinning foaming plate is enhanced;

5. in the application, the elastic colloid layer containing the aluminum oxide particles also has the function of protecting the wood wool, so that the wood wool can be prevented from being carbonized in the preparation process of the PVC skinning foaming board, and the carbonization of the wood wool is disabled.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

in the figure: 10-multilayer composite board; 11-PVC skinning foaming board; 12-adhesive layer.

The specific implementation mode is as follows:

in order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified with the specific embodiments.

Example 1:

as shown in fig. 1 and 2, the multilayer composite board comprises two PVC skinning foam boards 11 and an adhesive layer 12, wherein the adhesive layer 12 is formed between the PVC skinning foam boards 11, and the PVC skinning foam boards 11 are bonded to form a multilayer composite board 10 through the bonding action of the adhesive layer 12; the PVC skinning foam board 11 comprises a PVC foam board layer and skinning layers positioned on the upper surface and the lower surface of the PVC foam board layer, and the bonding layer 12 is coated between the adjacent skinning layers; the adhesive layer 12 has a thickness of 0.3mm, and the adhesive layer 12 is formed by coating acryl glue.

The application provides a more single PVC foaming board of multilayer composite board compares, utilize superimposed cortex to show the nail-holding power that strengthens multilayer composite board, make multilayer composite board 10 not only have the fire prevention that PVC foaming board had, give sound insulation and shock attenuation performance such as, and strengthened its connection performance as the connecting piece, adhesive linkage 12 between the multilayer PVC foaming board 11 not only plays the bonding effect, adhesive linkage 12 of formation has certain elasticity, when the screw passes this adhesive linkage 12, adhesive linkage 12 can produce an extrusion screw's reverse acting force with the junction of screw, thereby further promote multilayer composite board's nail-holding power.

The multilayer composite board is prepared by adopting a common PVC skinning foaming board in the market in the embodiment, and specifically, the PVC skinning foaming board produced by Shenzhen New Zhongmei decorating material Co.

Example 2:

as shown in the figure, the content of this embodiment is basically the same as the structure of embodiment 1, and the details of the same parts are not repeated, except that:

the PVC skinning foaming plate comprises the following components: 60kg of polyvinyl chloride resin powder, 30kg of modified wood wool, 1kg of stabilizer, 1kg of lubricant and 0.1kg of foaming agent;

the stabilizer is a composite lead stabilizer; the foaming agent consists of a yellow foaming agent and a white foaming agent, wherein the yellow foaming agent is azodicarbonamide, azodiisobutyronitrile, a nitroso foaming agent or a hydrazide foaming agent; the white foaming agent is sodium bicarbonate, ammonium carbonate or azide, and the mass ratio of the yellow foaming agent to the white foaming agent is 1: 1-1: 4; the lubricant is stearic acid, stearate, stearic alcohol compound, stearic acid amide, fatty acid metal soap, polyethylene wax, paraffin or oxidized polyethylene.

The preparation method of the PVC skinning plate comprises the steps of mixing the raw materials according to the formula, processing by adopting conical double-screw and three-roller processing equipment, wherein the rotating speed of a screw is 10-25 r/min, the processing temperature is 130-190 ℃, the oil temperature of the screw is 70-120 ℃, the temperature of a die is 150-180 ℃, the temperature of a die lip is 130-180 ℃, cooling and shaping by adopting three rollers, and cutting after eliminating tension to obtain the PVC skinning plate.

The modified wood wool is prepared by the following steps:

(2) Baking the wood wool obtained by the step (1), wherein the baking temperature is 20-45 ℃, and the baking time is that the water content of the wood wool is lower than 15% so as to form coke-dried wood wool;

(3) preparing a wear-resistant elastic glue solution:

specifically, the components of the wear-resistant elastic glue solution are as follows: 15-25% of ethyl acrylate, 10-15% of methyl methacrylate, 15-20% of polyurethane, 5-10% of alumina particles with the particle size of 10-40 um, 3-8% of alumina particles with the particle size of 200-400 um and the balance of deionized water;

Example 3:

the content of the present embodiment is substantially the same as that of embodiment 2, and the same points are not repeated, except that:

the PVC skinning foaming plate comprises the following components: 67kg of polyvinyl chloride resin powder, 35kg of modified wood wool, 1.5kg of stabilizer, 1.5kg of lubricant and 1kg of foaming agent.

Example 4

the PVC skinning foaming plate comprises the following components: 75kg of polyvinyl chloride resin powder, 40kg of modified wood wool, 2kg of stabilizer, 2kg of lubricant and 2kg of foaming agent.

Comparative example 1

The PVC skinning foam board is tested by adopting a common PVC skinning foam board on the market and a single PVC skinning foam board, and specifically, the PVC skinning foam board produced by Shenzhen New Zhongmei decorating material Limited is adopted in the comparative example.

Comparative example 2

The content of the comparative example is the same as that of the example 3, and the same parts are not repeated, except that:

the modified wood wool is prepared by the following steps:

(3) preparing a wear-resistant elastic glue solution:

specifically, the components of the wear-resistant elastic glue solution are as follows: 15-25% of ethyl acrylate, 10-15% of methyl methacrylate, 15-20% of polyurethane, 3-8% of alumina particles with the particle size of 200-400 um and the balance of deionized water;

Comparative example 3

the modified wood wool is prepared by the following steps:

(3) preparing a wear-resistant elastic glue solution:

specifically, the components of the wear-resistant elastic glue solution are as follows: 15-25% of ethyl acrylate, 10-15% of methyl methacrylate, 15-20% of polyurethane, 5-10% of alumina particles with the particle size of 10-40 um and the balance of deionized water;

Comparative example 4

the modified wood wool is prepared by the following steps:

(3) preparing a wear-resistant elastic glue solution:

specifically, the components of the wear-resistant elastic glue solution are as follows: 15-25% of ethyl acrylate, 10-15% of methyl methacrylate, 15-20% of polyurethane and the balance of deionized water;

And (3) performance testing:

the nail-holding power tests of the examples 2-3 and the comparative examples 1-4 are carried out by adopting a GB/T14018 wood nail-holding power test method, and the test results are shown in the following table 1:

TABLE 1

The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A multilayer composite board is characterized by at least comprising two PVC skinning foaming boards and an adhesive layer, wherein the adhesive layer is formed between the PVC skinning foaming boards and is bonded to form the multilayer composite board through the adhesive effect of the adhesive layer;

the PVC skinning foaming plate comprises the following components in parts by weight:

the stabilizer is a composite lead stabilizer; the foaming agent consists of a yellow foaming agent and a white foaming agent, wherein the yellow foaming agent is azodicarbonamide, azodiisobutyronitrile, a nitroso foaming agent or a hydrazide foaming agent; the white foaming agent is sodium bicarbonate, ammonium carbonate or azide, and the mass ratio of the yellow foaming agent to the white foaming agent is 1: 1-1: 4; the lubricant is stearic acid, stearate, a stearic alcohol compound, stearic acid amides, fatty acid metal soaps, polyethylene wax, paraffin or oxidized polyethylene;

the preparation method of the PVC skinning plate comprises the steps of mixing the raw materials according to the formula, processing by adopting conical double-screw and three-roller processing equipment, wherein the rotating speed of a screw is 10-25 r/min, the processing temperature is 130-190 ℃, the oil temperature of the screw is 70-120 ℃, the temperature of a die is 150-180 ℃, the temperature of a die lip is 130-180 ℃, and the PVC skinning plate is prepared by adopting three-roller cooling and shaping, eliminating tension and then cutting;

the modified wood wool is prepared through the following steps:

(2) Baking the wood wool obtained by the step (1), wherein the wood wool to be dried firstly enters a microwave drying box, and 50-60% of water is removed from the material through microwave; the microwave frequency of the microwave drying box is 1100-1400 MHz, and the temperature of the wood wool reaches 21 ℃ after microwave dehydration; the material after microwave dehydration enters a drying room, and is sequentially baked in three different temperature areas of 21-25 ℃, 25-30 ℃ and 30-35 ℃ in the drying room, wherein the total baking time is 4-6 hours, so that the water content of the wood wool is lower than 15%, and the scorched and dried wood wool is formed;

(3) preparing a wear-resistant elastic glue solution:

2. The multilayer composite board according to claim 1, wherein the adhesive layer has a thickness of 0.1 to 0.5 mm.

3. The multi-layer composite panel according to claim 2, wherein the adhesive layer is formed by coating an acryl glue.