CN103213178A - Thin blockboard and manufacturing method thereof - Google Patents
Thin blockboard and manufacturing method thereof Download PDFInfo
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- CN103213178A CN103213178A CN2013101379133A CN201310137913A CN103213178A CN 103213178 A CN103213178 A CN 103213178A CN 2013101379133 A CN2013101379133 A CN 2013101379133A CN 201310137913 A CN201310137913 A CN 201310137913A CN 103213178 A CN103213178 A CN 103213178A
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Abstract
The invention relates to the field of thin blockboard manufacturing, in particular to a thin blockboard and a manufacturing method of the thin blockboard. The thin blockboard comprises a China fir core board layer in the middle, poplar single board layers which are respectively spliced on the upper surface of the China fir core board layer and the lower surface of the China fir core board layer, and Okoume single board layers which are respectively spliced on the outer surfaces of the poplar single board layers. Adjacent board layers are spliced according to the perpendicular direction of wood texture, and modified soya bean glue is adopted to splice adjacent board layers. The solid thin blockboard has high splicing strength and is low in formaldehyde release amount, and at the same time, has the advantages of being mould-proof, corrosion-proof, insect-proof and water-proof.
Description
Technical field
The present invention relates to the core-board preparation field, is specifically related to a kind of core-board and manufacture method thereof.
Background technology
In recent years, owing to the core-board light weight, easily process, hold advantages such as screw power is good, intensity is high, indeformable, be used for furniture, door and window and cover, partition, false wall, heater cover, pelmet etc., purposes is very extensive, is the ideal material that interior decoration and top-grade furniture are made.But most core-boards still adopt the adhesive that contains free formaldehyde, and regulation discharges index though product can be up to state standards, when product in indoor use amount than greatly the time, its formaldehyde that discharges is still inevitable to the pollution of indoor environment.At present, because of containing the formaldehyde core-board, a large amount of uses cause having become a problem demanding prompt solution to human settlement's pollution and to the harm that health of people causes.Therefore, the core-board of the no free formaldehyde of exploitation has become the important development direction and the trend of core-board model change, publication number 202509731U(2012-10-31) Chinese patent adopts the bio-based adhesive to make the composite floor board that burst size of methanal is not more than 0.1mg/L; Yet the aqueous solution of formaldehyde is called formalin, is a kind of efficient sterilization disinfectant, also can be used as anticorrisive agent and uses, if there is not formaldehyde to cause the reduction of the plank burst size of methanal that uses, makes the phenomenon on insects moth erosion floors such as moth, termite take place again and again.
Summary of the invention
First purpose of the present invention is for solving the problems of the technologies described above, a kind of core-board being provided.Another object of the present invention provides a kind of preparation method of core-board.The solid wood core-board of manufacturing of the present invention possess high bonding strength, burst size of methanal low in, also have mildew-resistant, anticorrosion, insect protected and water-proof function.
First purpose of the present invention is achieved by the following technical programs: a kind of core-board, it comprises the fir core plate layer that mediates, and is bonded in the board using poplar board layer on two surfaces up and down of described fir core plate layer and the Okoume ply that is bonded in described board using poplar board layer outer surface respectively respectively; Undertaken bonding by the mutually perpendicular direction of the grain of wood between the adjacent described flaggy; Adopt modified soybean glue to carry out bonding between the adjacent described flaggy.
Modified soybean glue-line of the present invention comprises the raw material of following mass parts:
100 parts in water;
Soy-derived product 15-40 part;
Alkali 3-8 part;
Silicate 0.5-3 part;
Modifier 0.2-5 part;
Curing agent 0.3-2.5 part;
Acid 0.1-4 part;
Water-borne acrylic resin 0-20 part;
Insect-proof agent 0.1-1.5 part;
Filler 1-10 part.
Soy-derived product of the present invention are soyabean protein powder or soybean protein isolate.Soyabean protein powder is a raw material with soybean processing residue dregs of beans normally, forms through grinding.To be soyabean protein powder separate through further processing soybean protein isolate, removes most of carbohydrate and obtain.
Alkali of the present invention comprises NaOH or calcium hydroxide.Filler of the present invention is one or more the mixture in flour, starch, tannin, diatomite, kaolin, bentonite, talcum powder, the imvite.The adding of filler improves the tack of rubber made from soybean cake, when improving rubber made from soybean cake and using such as the precompressed effect of sheet material.
Contain a large amount of soybean proteins in the soy-derived product, soybean protein is a main bonding effect in rubber made from soybean cake, therefore adopting the soybean protein composition is the bonding agent of master's rubber made from soybean cake as the solid wood core-board, very environmental protection, but because in original protein, owing to the effect of non-covalent bonds such as Van der Waals force, hydrogen bond and hydrophobic bond produces intermolecular combining closely, can't play bonding, therefore need carry out modification to it launches soybean protein, increase the binding site of intermolecular reaction, just can play bonding effect and hydrophobic effect; In addition, owing to adopt soybean protein can make the reduction of burst size of methanal as main bonding agent, therefore the defective that therefore can cause the solid wood core-board after bonding easily to be corroded by the worm ant need increase the energy insect-proof agent in rubber made from soybean cake.In addressing the above problem, the inventor is through studying discovery for a long period of time, in the soybean protein expansion process, too much reduce its shear strength and hydrophobic effect if launch too much can cause protein molecule to expose as bonding agent, and then influence adhesive effect, and the very few adhesive effect that also can influence of outer leakage quantity; In addition, the affiliation that adds of insect-proof agent influence the adhesive effect of rubber made from soybean cake, and this also is the difficult point of insect-proof agent adding rubber made from soybean cake.Therefore, the inventor not only needs the composition of rubber made from soybean cake and content are carried out strict collocation and adjusting, makes it possess high bonding strength, low burst size of methanal, simultaneously, also to regulate, make rubber made from soybean cake also have mildew-resistant, anticorrosion, insect protected and water-proof function insect-proof agent content and composition.
In order to overcome the above problems, the inventor sets about from two aspects:
1, the present invention adjusts other composition interpolation kind and content in the bonding usefulness of the core-board rubber made from soybean cake, to guarantee that soybean protein has suitable outer leakage quantity to be fit to other compound reaction when launching, make it produce hydrophobicity and stronger adhesive strength, thus intensity and adhesive effect when guaranteeing that core-board uses.
2, the present invention adjusts the addition of regulating insect-proof agent, reduce its adverse effect to bonding strength, when making the rubber made from soybean cake burst size of methanal low, also have mildew-resistant, anticorrosion, insect protected function, make core-board of the present invention when burst size of methanal is low, have mildew-resistant, anticorrosion, vermins-proof effect.
Core-board of the present invention adopts alkali and modifier cooperation that soybean protein is carried out modification with modified soybean glue, can not degrade when protein is launched, and guarantee to have the suitable group that exposes; Because alkali has the stronger effect that soybean protein is launched among the present invention, but use can cause the decomposition of part soybean protein can not play good adhesive effect separately; Therefore, the inventor finds to add modifier and cooperates the alkali effect can improve modified effect greatly, because modifier can not make it degrade when making soybean protein hydrolysis such as urea through studying for a long period of time; In addition, the inventor finds that adding alkali separately still is that urea wants to make the soybean egg fully to launch all to need high concentration, and the alkali of high concentration or urea excessively increase the soybean protein deformation extent and then cause its shearing strength to descend; The alkali of low concentration or urea then can not play and make soybean protein launch to reach the suitable outer leakage quantity of wanting required for the present invention, do not have adhesive effect and good hydrophobic effect; Therefore the present invention rationally adjusts the addition of alkali and modifier according to the content of soy-derived product, makes it reach the adhesive effect of the core-board of wanting required for the present invention.
In addition, core-board is sodium metasilicate or potassium silicate with silicate described in the rubber made from soybean cake among the present invention, it can cooperatively interact with modifier and alkali, and the cross-linking reaction in the glue process is stablized in the expansion of promotion soybean protein simultaneously, makes the resistance to water and the bonding strength of the modified soybean glue that obtains more excellent; Core-board contains carbonyl with water-borne acrylic resin in the rubber made from soybean cake among the present invention, it can produce by grafting with the nucleophilic groups such as amino, hydroxyl that contain on the soybean protein polypeptide chain and react to each other, make the interaction between protein molecule descend, polypeptide chain is launched, make simultaneously that hydrophobic grouping turns up in the protein molecule, resistance to water improves, and cooperates further that other composition promptly improves its adhesive effect in core-board to improve the adhesive strength of rubber made from soybean cake in the rubber made from soybean cake.
In addition, core-board of the present invention is phosphoric acid or oxalic acid with acid described in the rubber made from soybean cake, pH value in the time of can cooperating the adding of alkali to regulate rubber made from soybean cake to prepare, because in the native protein molecule, most polarity and non-polar group are owing to the effect from Fan Dehuali, hydrogen bond, hydrophobic effect etc., bonding effect is relatively poor, and when hydrolysis or raising pH value, can help making protein molecule to disperse and expansion, polarity and non-polar group expose, can contact with timber and interact, thus the adhesive strength of raising adhesive; Acid of the present invention is used to regulate the pH value, the pH value of modified soybean glue is controlled between 6～8, in this pH value is interval, cooperates modifier, silicate and alkali simultaneously, can make soybean protein launch appropriateness, be more conducive to reach the group amount that to leak outside required for the present invention, improve the result of use of core-board.
At last, the addition of insect-proof agent of the present invention is through inventor's gained that studies for a long period of time, this addition cooperates other composition in the rubber made from soybean cake, not only can not influence the bonding strength of rubber made from soybean cake of the present invention but also can also play good insect protected, antiseptic effect, more effectively solve the defective that existing sheet material causes product easily to be corroded by the worm ant because of the reduction of burst size of methanal.The adding of insect-proof agent makes vermins-proof effect lasting, make product possess certain medicine carrying amount, reach the function of long-acting insect protected, and have certain antiseptic property, can effectively prolong the shelf life of modified soybean glue, prevent that rubber made from soybean cake is rotten in advance and influence the bonding strength of final core-board.
In sum, the inventor prepares core-board, and to adopt rubber made from soybean cake to make it contain the formaldehyde amount as bonding agent low, and can make soybean protein have an amount of degree to launch protein molecule, the protein molecule of this expansion not only can strengthen bonding force with the increase contact area of other admixture reaction, and modification the protein molecule hydrophobic grouping how outward, being easy to be penetrated into needs in the solid wood of the viscose glue core-board, produce stronger adhesive strength and hydrophobicity, thereby show shearing strength and water-resistance preferably; The adding of insect-proof agent simultaneously makes vermins-proof effect lasting, make the solid wood core-board possess certain medicine carrying amount, reach the function of long-acting insect protected, and has certain antiseptic property, can effectively prolong the shelf life of modified soybean glue, prevent that rubber made from soybean cake is rotten in advance and influence the bonding strength of final solid wood core-board.
As preferably, it comprises the raw material of following mass parts:
100 parts in water;
Soy-derived product 20-30 part;
Alkali 4-6 part;
Silicate 2-3 part;
Modifier 3-5 part;
Curing agent 0.3-2.5 part;
Acid 2-4 part;
Water-borne acrylic resin 10-15 part;
Insect-proof agent 1-1.5 part;
Filler 5-8 part.
As preferably, described modifier is urea.
As preferably, it comprises that also mass parts is the sulphite of 0.5-3 part.The protein adhesive of alkali modification of the present invention also has higher viscosity, and viscosity too conference influence the flowability of adhesive, therefore, the present invention reduces its intermolecular interaction and then reduces viscosity by adding sulphite, because the existence of disulfide bond influences its mounted molecule and extensibility in the native protein molecule, adding sulphite can cooperate silicate to play the intermolecular or intramolecular disulfide bond effect of shearing as reducing agent, thereby improve protein molecule surface hydrophobic and foaming characteristic and bubble stability, but disulfide bonds too much can reduce the rubber made from soybean cake surface hydrophobic greatly, therefore, the addition of sulphite of the present invention also is to study for a long period of time through the inventor to cooperate other composition to play a role jointly, to guarantee the adhesive effect of rubber made from soybean cake.
As preferably, described curing agent is polyamide polyamine-epoxychloropropane.Curing agent is polyamide polyamine-epoxychloropropane (PAE) among the present invention, polyamide polyamine-epoxychloropropane is that secondary amine and the epichlorohydrin reaction in the polyamide polyamine forms the ammonium salt polyamide polyamine that contains epoxy, can be water-soluble, at room temperature relatively stable, but it is during as the curing agent of rubber made from soybean cake, in hot pressing, can form more water-fast cross-linked structure with proteins react, thereby improve the resistance to water of product.
As preferably, described pyrethroid insect-proof agent is at least a in cypermethrin, fenvalerate, Permethrin, Biphenthrin and the cyphenothrin.Insect-proof agent of the present invention is the pyrethroid insect-proof agent, and described pyrethroid insect-proof agent is the microcapsules form; The not only stable performance of pyrethroid insect-proof agent of microcapsules form, vermins-proof effect is lasting, do not influence the bonding strength of adhesive, and can in adhesive, be uniformly dispersed, can be with glue to the timber internal penetration, make product possess certain medicine carrying amount, reach the function of long-acting insect protected, the more important thing is, pyrethroid insect-proof agent high-efficiency low-toxicity, has certain antiseptic property, can effectively prolong the shelf life of modified soybean glue, prevent that rubber made from soybean cake is rotten in advance, influence the bonding strength of final products.
As preferably, described Okoume ply is a rotary-cut Okoume ply; Described board using poplar board layer is a rotary-cut board using poplar board layer; Described fir core plate layer is to adopt the gluing fir core plate layer that is combined into that connects of modified soybean.
As preferably, the described fir core plate layer thickness of stating is the 10-16 millimeter; Described board using poplar board layer thickness is the 0.6-1.5 millimeter; Described Okoume ply thickness is the 0.1-1 millimeter.The fir core plate layer of core-board of the present invention belongs to super thick-layer, and than the glued board of equal thickness of slab, glue consumption significantly reduces.The board using poplar board layer makes product have enough transverse strengths, cushions the harmful effect of wearing to plate because of the out-of-flatness of fir core plate simultaneously.
The direction of the grain of wood of adjacent two flaggies of the present invention is orthogonal, help the stress release between the lumber layer, can solve the problem of thick veneer distortion, warpage and cracking well, and can reduce the loss of breaking and causing because of veneer in the subsequent handling, thereby improve timber utilization rate.
Another object of the present invention is achieved by the following technical programs: a kind of manufacture method as a kind of core-board as described in the claim 4 to 9 may further comprise the steps successively:
A) make modified soybean glue: alkali and water are made into alkali lye, in alkali lye, add silicate again, sulphite and modifier, stirred 3-10 minute, temperature is controlled to be 80-96 ℃, obtains preliminary mixed solution, then adds soy-derived product in described preliminary mixed solution, stirred 10-60 minute, temperature is controlled to be 80-96 ℃, obtains mixed solution, adds curing agent then in described mixed solution, stirred 10-60 minute, obtain solidifying mixed liquor, in described curing mixed liquor, add acid, stirred 5-10 minute, obtain the regulator solution of pH value for 6-8, in described adjusting mixed liquor, add water-borne acrylic resin again, stirred adjusted mixed liquor 20-40 minute; In described adjusting mixed liquor, add insect-proof agent and filler at last, stirred 10-30 minute;
B) above-mentioned modified soybean glue is coated on described board using poplar board layer single face and will apply behind the rubber made from soybean cake described single face its be affixed on the two sides of described fir core plate, make adhesive curing form slab by colding pressing, the outer surface of described then slab sanding and the described slab after sanding applies described rubber made from soybean cake and sticks the Okoume ply again, cold pressing at last and hot pressing obtain the hot pressing slab; Pressure is 0.8～1.2Mpa during described colding pressing, and the time of colding pressing is 60～120min; Pressure is 0.8～1.2Mpa during described hot pressing, and hot pressing temperature is 110～140 ℃, and hot pressing speed is 0.7～1.3min/mm;
C) saw limit sanding: with above-mentioned hot pressing slab saw limit again sanding promptly obtain core-board.
The invention has the beneficial effects as follows:
1, core-board of the present invention adopts rubber made from soybean cake as bonding agent, and wherein, alkali and modifier cooperation are carried out modification to soybean protein, can not degrade when protein is launched, and guarantee to have the suitable group that exposes; In addition, the inventor has adjusted the content of modifier and alkali through studying for a long period of time, more helps the bonding strength and the resistance to water of rubber made from soybean cake, makes core-board have better result of use.
2, adopt acid that the pH value of modified soybean glue is controlled between 6～8 in the core-board bonding agent rubber made from soybean cake of the present invention, this interval can make soybean protein launch appropriateness, cooperates to reach the group amount that will leak outside required for the present invention, has improved the bonding strength of core-board.
3, not only stable performance of insect-proof agent in the core-board bonding agent rubber made from soybean cake of the present invention, vermins-proof effect is lasting, not only influence the bonding strength of adhesive, and can in adhesive, be uniformly dispersed, can be with glue to the timber internal penetration, make product possess certain medicine carrying amount, reach the function of long-acting insect protected, the more important thing is, pyrethroid insect-proof agent high-efficiency low-toxicity, has certain antiseptic property, can effectively prolong the shelf life of modified soybean glue, prevent that rubber made from soybean cake is rotten in advance, influence the bonding strength of final core-board.
4, in the core-board bonding agent rubber made from soybean cake of the present invention insect-proof agent is combined with rubber made from soybean cake, this product core-board burst size of methanal is controlled in the 0.1mg/L, and the II class glue requirement that is up to state standards of sheet material bonding strength; More effectively solved the defective that existing core-board causes core-board easily to be corroded by the worm ant because of the reduction of burst size of methanal.
The specific embodiment
This specific embodiment only is an explanation of the invention; it is not a limitation of the present invention; those skilled in the art can make the modification that does not have creative contribution to present embodiment as required after reading this specification, but as long as all are subjected to the protection of Patent Law in claim scope of the present invention.
Embodiment 1
Modified soybean glue configuration: in three mouthfuls of round-bottomed flasks, add 3g alkali and 100g water, described alkali is NaOH, stirred 3 minutes, and made dissolution of sodium hydroxide, in alkali lye, add 0.5g silicate, 0.5g sulphite and 0.2g modifier again, described silicate is sodium metasilicate, described modifier is urea, and described sulphite is sulphite sodium, and stirs 3 minutes, temperature is 80-96 ℃, obtains preliminary mixed solution; Then add the soy-derived product of 15g in described preliminary mixed solution, described soy-derived product are soybean protein isolate, stir 10 minutes, and temperature is 80 ℃, and soybean protein isolate is well dispersed in the solution, obtains mixed solution; Add 0.3g then, mass concentration is the aqueous solution of curing agent polyamide polyamine-epoxychloropropane (PAE) of 12.5%, stirs 10 minutes, obtains solidifying mixed liquor; Then add acid, described acid is that 0.1 mass concentration is 35% phosphoric acid, stirs 5 minutes, obtains the pH value and be 6 regulator solution; Then in described adjusting mixed liquor, add the 10g water-borne acrylic resin, stirred adjusted mixed liquor 20 minutes.Add 0.1g insect-proof agent and 1g filler to described adjusting mixed liquor at last, described insect-proof agent is a cypermethrin, and described filler is a kaolin, stirs 10 minutes, pours out and promptly makes modified soybean glue.
Core-board is made: with the applying glue of board using poplar board layer single face, be attached to the two sides of fir core plate layer respectively, the board using poplar board layer texture is vertical with the fir core plate layer texture, and colds pressing by cold press, makes glue precuring; Slab after will colding pressing well passes through abrasive finishing machine abrasive finishing, again that sanding is good slab single face applying glue, and stick the Okoume ply, adopt the applying glue that uses the same method at its reverse side again, stick the Okoume ply, Okoume ply texture is vertical with the board using poplar board layer texture, and the slab that will post the Okoume ply is then colded pressing by cold press, again by hot press hot pressing; Pressure is 0.8Mpa when colding pressing, and the time of colding pressing is 60min; Pressure is 0.8Mpa during described hot pressing, and hot pressing temperature is 110 ℃, and hot pressing speed is 0.7min/mm; Then with above-mentioned hot pressing slab saw limit again sanding promptly obtain core-board.Because poplar and China fir all belong to easily dry seeds, easy fracture or the warpage of taking place in high temperature, the present invention colds pressing earlier in Okoume ply and poplar gummed and board using poplar board layer and fir core plate layer gummed, has eliminated because of pyrogenetic look change or charing; And avoided the temperature difference between layer and the layer, improved the stability of sheet material, can realize the abundant curing of rubber made from soybean cake stick between layer and the layer.
Embodiment 2
With embodiment 1, different is that described alkali is calcium hydroxide; Described silicate is potassium silicate; Described acid is oxalic acid; Described pyrethroid insect-proof agent is fenvalerate and Permethrin; Described filler is a flour; Described soy-derived product are soyabean protein powder.
Embodiment 3
With embodiment 1, different is that described alkali is calcium hydroxide; Described silicate is sodium metasilicate; Described acid is oxalic acid; Described pyrethroid insect-proof agent is fenvalerate, Biphenthrin and cyphenothrin; Described filler is the diatomite bentonite; Described soy-derived product are soyabean protein powder.
Embodiment 4
In three mouthfuls of round-bottomed flasks, add 5g alkali and 100g water, described alkali is NaOH, stirred 6 minutes, and made dissolution of sodium hydroxide, in alkali lye, add 2g silicate, 2g sulphite and 2g modifier again, described silicate is sodium metasilicate, described modifier is urea, and described sulphite is sulphite sodium, and stirs 6 minutes, temperature is 90 ℃, obtains preliminary mixed solution; Then add the soy-derived product of 25g in described preliminary mixed solution, described soy-derived product are soybean protein isolate, stir 30 minutes, and temperature is 90 ℃, and soybean protein isolate is well dispersed in the solution, obtains mixed solution; Add 3g then, mass concentration is the aqueous solution of curing agent polyamide polyamine-epoxychloropropane (PAE) of 12.5%, stirs 30 minutes, obtains solidifying mixed liquor; Then add acid, described acid is that the mass concentration of 2g is 35% phosphoric acid, stirs 7 minutes, obtains the pH value and be 7 regulator solution; Then in described adjusting mixed liquor, add the 15g water-borne acrylic resin, stirred adjusted mixed liquor 30 minutes.Add 1g insect-proof agent and 5g filler to described adjusting mixed liquor at last, described insect-proof agent is a cypermethrin, and described filler is a kaolin, stirs 20 minutes, pours out and promptly makes modified soybean glue.
Core-board is made: with the applying glue of board using poplar board layer single face, be attached to the two sides of fir core plate layer respectively, the board using poplar board layer texture is vertical with the fir core plate layer texture, and colds pressing by cold press, makes glue precuring; Slab after will colding pressing well passes through abrasive finishing machine abrasive finishing, again that sanding is good slab single face applying glue, and stick the Okoume ply, adopt the applying glue that uses the same method at its reverse side again, stick the Okoume ply, Okoume ply texture is vertical with the board using poplar board layer texture, and the slab that will post the Okoume ply is then colded pressing by cold press, again by hot press hot pressing; Pressure is 0.8～1.2Mpa when colding pressing, and the time of colding pressing is 60～120min; Pressure is 0.8～1.2Mpa during described hot pressing, and hot pressing temperature is 110～140 ℃, and hot pressing speed is 0.7～1.3min/mm; Above-mentioned slab is carried out cutting edge, and sanding then makes substrate layer; Again melamine glue is coated on two outer surfaces of above-mentioned substrate layer, again described decorative layer and balance layer are affixed on respectively on two outer surfaces of described substrate layer, hot pressing after then the sheet material of fitting being colded pressing earlier, pressure is 0.1.0a when colding pressing, the time of colding pressing is 90min; Pressure is 1.0Mpa during described hot pressing, and hot pressing temperature is 125 ℃, and hot pressing speed is 1.0min/mm; Then above-mentioned sheet material is carried out health and handle, carry out sanding after health is handled and handle, offer the tongue and groove that is used to install on its four limit then, paint promptly obtains the solid wood core-board at last.
Embodiment 5
With embodiment 4, different is that described alkali is calcium hydroxide; Described silicate is potassium silicate; Described acid is oxalic acid; Described pyrethroid insect-proof agent is fenvalerate and Permethrin; Described filler is a flour; Described soy-derived product are soyabean protein powder.
Embodiment 6
With embodiment 4, different is that described alkali is calcium hydroxide; Described silicate is sodium metasilicate; Described acid is oxalic acid; Described pyrethroid insect-proof agent is fenvalerate, Biphenthrin and cyphenothrin; Described filler is the diatomite bentonite; Described soy-derived product are soyabean protein powder.
Embodiment 7
In three mouthfuls of round-bottomed flasks, add 8g alkali and 100g water, described alkali is NaOH, stirred 10 minutes, and made dissolution of sodium hydroxide, in alkali lye, add 3g silicate, 3g sulphite and 5g modifier again, described silicate is sodium metasilicate, described modifier is urea, and described sulphite is sulphite sodium, and stirs 10 minutes, temperature is 96 ℃, obtains preliminary mixed solution; Then add the soy-derived product of 40g in described preliminary mixed solution, described soy-derived product are soybean protein isolate, stir 60 minutes, and temperature is 96 ℃, and soybean protein isolate is well dispersed in the solution, obtains mixed solution; Add 2.5g then, mass concentration is the aqueous solution of curing agent polyamide polyamine-epoxychloropropane (PAE) of 12.5%, stirs 60 minutes, obtains solidifying mixed liquor; Then add acid, described acid is that the mass concentration of 4g is 35% phosphoric acid, stirs 10 minutes, obtains the pH value and be 8 regulator solution; Then in described adjusting mixed liquor, add the 20g water-borne acrylic resin, stirred adjusted mixed liquor 40 minutes.Add 1.5g insect-proof agent and 10g filler to described adjusting mixed liquor at last, described insect-proof agent is a cypermethrin, and described filler is a kaolin, stirs 30 minutes, pours out and promptly makes modified soybean glue.
Core-board is made: with the applying glue of board using poplar board layer single face, be attached to the two sides of fir core plate layer respectively, the board using poplar board layer texture is vertical with the fir core plate layer texture, and colds pressing by cold press, makes glue precuring; Slab after will colding pressing well passes through abrasive finishing machine abrasive finishing, again that sanding is good slab single face applying glue, and stick the Okoume ply, adopt the applying glue that uses the same method at its reverse side again, stick the Okoume ply, Okoume ply texture is vertical with the board using poplar board layer texture, and the slab that will post the Okoume ply is then colded pressing by cold press, again by hot press hot pressing; Pressure is 1.2Mpa when colding pressing, and the time of colding pressing is 120min; Pressure is 1.2Mpa during described hot pressing, and hot pressing temperature is 140 ℃, and hot pressing speed is 1.3min/mm; Above-mentioned slab is carried out cutting edge, and sanding then makes substrate layer; Again modified soybean glue is coated on two outer surfaces of above-mentioned substrate layer, again described decorative layer and balance layer are affixed on respectively on two outer surfaces of described substrate layer, hot pressing after then the sheet material of fitting being colded pressing earlier, pressure is 1.2Mpa when colding pressing, the time of colding pressing is 120min; Pressure is 1.2Mpa during described hot pressing, and hot pressing temperature is 140 ℃, and hot pressing speed is 1.3min/mm; Then above-mentioned sheet material is carried out health and handle, carry out sanding after health is handled and handle, offer the tongue and groove that is used to install on its four limit then, paint promptly obtains the solid wood core-board at last.
Embodiment 8
With embodiment 7, different is that described alkali is calcium hydroxide; Described silicate is potassium silicate; Described acid is oxalic acid; Described pyrethroid insect-proof agent is fenvalerate and Permethrin; Described filler is a flour; Described soy-derived product are soyabean protein powder.
Embodiment 9
With embodiment 7, different is that described alkali is calcium hydroxide; Described silicate is sodium metasilicate; Described acid is oxalic acid; Described pyrethroid insect-proof agent is fenvalerate, Biphenthrin and cyphenothrin; Described filler is the diatomite bentonite; Described soy-derived product are soyabean protein powder.
Comparative Examples 1
With embodiment 1, different is not add water-borne acrylic resin in the described rubber made from soybean cake.From table 1 test result as can be seen, do not add water-borne acrylic resin and cause the bonding strength of rubber made from soybean cake to reduce, be 0.6MPa.
Comparative Examples 2
With embodiment 1, different is not add curing agent in the described rubber made from soybean cake.From table 1 test result as can be seen, do not add curing agent and cause the bonding strength of rubber made from soybean cake to reduce, be 0.7MPa.
Comparative Examples 3
With embodiment 1, different is not add modifier in the described rubber made from soybean cake.From table 1 test result as can be seen, do not add curing agent and cause the bonding strength of rubber made from soybean cake to reduce, be 0.3MPa.
Comparative Examples 4
Adopt patent publication No. 202509731U(2012-10-31) the middle PUR adhesive that uses.
Gluing uses the rubber made from soybean cake and the Comparative Examples PUR adhesive of the foregoing description respectively during experiment test, and concrete steps are as follows: the Eucalyptus veneer is through gluing, and ageing is colded pressing, and hot pressing and the process of cutting make three layers of Eucalyptus glued board, and glue-spread is 400g/m
2(two-sided), cold-press process: pressure 1.0MPa, time 1h; Heat pressing process: 120 ℃ of temperature, pressure 1.0MPa, time 60s/mm.According to GB/T 17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " regulation, three layers of glued board that make are carried out bonding strength and burst size of methanal detection; In addition, three layers of glued board that make are got the identical size sample of size respectively put into the culture dish that cultivation has the equal number termite, cultivate the death rate that detects the survival number of termite in the culture dish after 24 hours and calculate termite.Concrete test result is shown in Table 1:
Table 1 embodiment and Comparative Examples experiment test result
Detect data as seen by table 1, the embodiment of the invention is made rubber made from soybean cake and be higher than Comparative Examples far away on bonding strength and insect protected rate; In addition, from Comparative Examples as can be seen the interpolation of curing agent polyamide polyamine-epoxychloropropane (PAE), water-borne acrylic resin, modifier the bonding strength of rubber made from soybean cake is increased significantly.By Comparative Examples 4 as can be known, the interpolation of pyrethroid insect-proof agent has thoroughly solved sheet material and has subjected to the problem that termite, moth corrode in the rubber made from soybean cake of embodiment of the invention preparation, prolong the service life of sheet material, and burst size of methanal is well below Comparative Examples 4.
Claims (10)
1. core-board, it is characterized in that: it comprises the fir core plate layer that mediates, and is bonded in the board using poplar board layer on two surfaces up and down of described fir core plate layer and the Okoume ply that is bonded in described board using poplar board layer outer surface respectively respectively; Undertaken bonding by the mutually perpendicular direction of the grain of wood between the adjacent described flaggy; Adopt modified soybean glue to carry out bonding between the adjacent described flaggy.
2. a kind of according to claim 1 core-board, it is characterized in that: described modified soybean glue-line comprises the raw material of following mass parts:
100 parts in water;
Soy-derived product 15-40 part;
Alkali 3-8 part;
Silicate 0.5-3 part;
Modifier 0.2-5 part;
Curing agent 0.3-2.5 part;
Acid 0.1-4 part;
Water-borne acrylic resin 0.1-20 part;
Insect-proof agent 0.1-1.5 part;
Filler 1-10 part.
3. as a kind of core-board as described in the claim 2, it is characterized in that: it comprises the raw material of following mass parts:
100 parts in water;
Soy-derived product 20-30 part;
Alkali 4-6 part;
Silicate 2-3 part;
Modifier 3-5 part;
Curing agent 0.3-2.5 part;
Acid 2-4 part;
Water-borne acrylic resin 10-15 part;
Insect-proof agent 1-1.5 part;
Filler 5-8 part.
4. as a kind of core-board as described in the claim 3, it is characterized in that: described modifier is urea.
5. as a kind of core-board as described in the claim 4, it is characterized in that: it comprises that also mass parts is the sulphite of 0.5-3 part.
6. as a kind of core-board as described in the claim 5, it is characterized in that: described curing agent is polyamide polyamine-epoxychloropropane.
7. as a kind of core-board as described in the claim 6, it is characterized in that: described insect-proof agent is at least a in cypermethrin, fenvalerate, Permethrin, Biphenthrin and the cyphenothrin.
8. as a kind of core-board as described in the claim 7, it is characterized in that: described Okoume ply is a rotary-cut Okoume ply; Described board using poplar board layer is a rotary-cut board using poplar board layer; Described fir core plate layer is to adopt the gluing fir core plate layer that is combined into that connects of modified soybean.
9. as a kind of core-board as described in the claim 8, it is characterized in that: the described fir core plate layer thickness of stating is the 10-16 millimeter; Described board using poplar board layer thickness is the 0.6-1.5 millimeter; Described Okoume ply thickness is the 0.1-1 millimeter.
10. manufacture method as a kind of core-board as described in the claim 4 to 9 is characterized in that: may further comprise the steps successively:
A) make modified soybean glue: alkali and water are made into alkali lye, in alkali lye, add silicate again, sulphite and modifier, stirred 3-10 minute, temperature is controlled to be 80-96 ℃, obtains preliminary mixed solution, then adds soy-derived product in described preliminary mixed solution, stirred 10-60 minute, temperature is controlled to be 80-96 ℃, obtains mixed solution, adds curing agent then in described mixed solution, stirred 10-60 minute, obtain solidifying mixed liquor, in described curing mixed liquor, add acid, stirred 5-10 minute, obtain the regulator solution of pH value for 6-8, in described adjusting mixed liquor, add water-borne acrylic resin again, stirred adjusted mixed liquor 20-40 minute; In described adjusting mixed liquor, add insect-proof agent and filler at last, stirred 10-30 minute;
B) above-mentioned modified soybean glue is coated on described board using poplar board layer single face and will apply behind the rubber made from soybean cake described single face its be affixed on the two sides of described fir core plate, make adhesive curing form slab by colding pressing, the outer surface of described then slab sanding and the described slab after sanding applies described rubber made from soybean cake and sticks the Okoume ply again, cold pressing at last and hot pressing obtain the hot pressing slab; Pressure is 0.8～1.2Mpa during described colding pressing, and the time of colding pressing is 60～120min; Pressure is 0.8～1.2Mpa during described hot pressing, and hot pressing temperature is 110～140 ℃, and hot pressing speed is 0.7～1.3min/mm;
C) saw limit sanding: with above-mentioned hot pressing slab saw limit again sanding promptly obtain core-board.
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