CN101638874A - Method for preparing fiber wallboard through wet process - Google Patents
Method for preparing fiber wallboard through wet process Download PDFInfo
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- CN101638874A CN101638874A CN200910168626A CN200910168626A CN101638874A CN 101638874 A CN101638874 A CN 101638874A CN 200910168626 A CN200910168626 A CN 200910168626A CN 200910168626 A CN200910168626 A CN 200910168626A CN 101638874 A CN101638874 A CN 101638874A
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Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Paper (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a method for preparing a fiber wallboard through a wet process. The method comprises the following steps: 1) pulping: mixing non-wood type natural plant fiber pulp with gramineous plant pulp according to a dry weight ratio of 1:0-1.5 and adding water into the raw materials to dilute the pulp; 2) storing the pulp: placing the obtained mixture pulp into a pulp storage pond and adding water for dilution; 3) carrying out suction filter and formation: inputting the pulp obtained from the previous step into a die cavity for cold-pressing, dehydration and formation so as to obtain a wet blank; and 4) carrying out hot-pressing formation and drying; transferring the wet blank into a hot-pressing mould for hot pressing, removing water generated during the hot pressing, and obtaining the fiber wallboard. The fiber wallboard obtained by using the method has the characteristics of environment-friendliness and high strength.
Description
Technical field
The invention belongs to the material field, relate to a kind of preparation method who decorates with fiber wallboard, particularly a kind of method for preparing indoor decoration flame retardant type fiber wallboard with the wet method molding process planning.
Background technology
Wall decorative material is an indispensable important component part in the building construction, also is the important development field in the present building material.Building is a mainstay of the national economy industry, also is the foundation engineering of modernization construction.At present, the annual city completion area of dwelling structure of China is about 3.35 hundred million m
2, about 500,000,000 m of the annual completion area of dwelling structure in villages and small towns
2, about 600,000,000 m are built with public building, the productivity of building in city and villages and small towns
2The required wall decorative material of these architectural engineerings needs 4,000,000,000 m approximately with 2.5 times of calculating of construction area
2The huge market demand is for the market prospects of novel wall ornament materials have been established good development foundation.
The kind of present traditional indoor wall ornament materials is a lot, mainly contains on the building and ornament materials market at home and abroad: plasterboard, aluminium-plastic panel, polyester fiber plate, mineral wool board, tencel cement Side fascia, environmental protection woodwork plate, glued board etc.But it is few that the product on the market meets the standard of green building material fully, do not use recyclable materials to make and the complete decorated articles of environmental protection basically.The easy hardening embrittlement of plastic products, the time is for a long time also easy to change, and discarded being difficult to later on degraded, and causes great environmental pollution.Though plastering is cheap, the outward appearance nature, but serious inadequately, tide is afraid of in moisture absorption, the jaundice variable color easily comes off.Wood chip products is used for the decorative panel liner of furniture mostly, and the decorative pattern veneer is used in the outside, has problems such as fastness is not high, adhesive contamination.Chang Yong medium density fibre board (MDF) though outward appearance and inherent quality are all relatively good, exists adhesive contamination indoor environment and materials more in the market, costs an arm and a leg, and still is subjected to certain restriction on being extensive use of, and mainly is suitable as high-grade ornament materials.
Materials such as decoration at present, clamping plate that compartment uses, log are essentially combustibles, though also have nonflammable material on the market, but existing, general nonflammable material makes the shortcoming that is difficult for reaching Heavy Weight, the plasterboard made from high burning-point characteristic for example, after the burning or under the xeothermic situation of weather, the easy embrittlement of this gypsum, even cause bending, peel off and problem such as be full of cracks, especially strengthen with respect to present Global Greenhouse Effect, temperature rises year by year, therefore with gypsum as nonflammable material, do not met the requirement of modern interior decoration, the utmost point need improve.
Dalle in the market adopts the dry process preparation mostly, as plasterboard, artificial decorative board, polyester fiber plate, mineral wool board, glued board etc.The string wallboard adopts the dry-press process explained hereafter mostly, promptly be equipped with auxiliary agent dry mixed such as amylan or thermoplastic polymer, coupling agent, blowing agent, lubricant at normal temperatures mixes thoroughly with the raw material of pulverizing (maize straw, straw, wheat straw, cavings, sawdust etc.), enter mould with artificial (or machinery) material loading, extrusion modling forms.The step of dry process: raw material pulverizing, reinforced mix, mat formation, hot-forming, the demoulding, finished product.The shortcoming that these steps cause is as follows: 1, can not make the real green product of degraded fully.Be in nondegradable material, to add some photodissociation materials or a spot of starch makes it be decomposed into little powder mostly with the product of this explained hereafter on the market, not degraded truly, so its pollution and harm to environment still exists.2, the part product that is added with starch easily goes mouldy unsuitable long preservation under wet environment; 3, weight lays particular stress on, and cost of transportation is higher, also can increase the weight of offal treatment simultaneously.
In disclosed technology at present, patent documentation CN1108988A discloses " a kind of dry method does not have the production method of glue hardboard ", this method through fiber separation, drying, gets a kind of wood-based plate in the condition compacted under, the hot pressing that do not apply synthetic resin with plant material.The product strength of this method gained is lower.
Patent documentation CN1654180 discloses " a kind of method of manufacturing glue-less fiber board by leak-free type hot pressing technology ", the manufacture method of the non-glue fibre board that it provides, and a kind of hot pressing pressure is low, the thickness of product and density range are bigger.Since its employed raw material with and special process, cause this kind non-glue fibre board insufficient strength when thickness is low.
Disclose among the patent documentation CN1184161C " environment protection type flame-retarding decorative plate and preparation method thereof ", this method provide a kind of formaldehydeless, have fire retardation, make simple, that cost is low environment friendly decoration board and preparation method thereof, but this method is to add conventional flame retardants in dry process, add glutinous paste then and do the adhesive extrusion forming, technology relative complex and not being applied on the wet processing.
The fiber board products that existing wet therapy forming process is produced, mainly be the goods of tableware equal thickness less than 5mm, its production technology adopts transmission of vapour pressure formula and pressurization basically, moulding pressure is less, thereby be difficult to form certain thickness goods, and can not form the surface and have the degree of precision goods, more not relate to the formation of convex-concave degree.Up to now, goods and the relevant report that the three-dimensional paper technology of utilization paper mould wet method is produced the flame retardant type fiber wallboard also do not appear.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of with low cost, manufacture craft and simply utilizes wet processing to prepare the method for fiber wallboard, adopt this method preparation and fiber wallboard have environmental protection and high-intensity characteristics.
In order to solve the problems of the technologies described above, the invention provides a kind of method of utilizing wet processing to prepare fiber wallboard, may further comprise the steps successively:
1), slurrying:
Non-wood type natural plant fibre slurry and grass slurry are mixed according to 1: 0～1.5 dry weight weight ratio; Become raw material; Thin up is dredged slurry in above-mentioned raw materials, gets mixed pulp after evenly stirring; The raw material dry weight accounts for 3.0～5.0% of mixed pulp weight;
2), storage slurry:
Above-mentioned mixed pulp is put into pulp storage tank, convert the water dilution, after evenly stirring, get slurries; Described raw material dry weight accounts for 0.3～0.6% of slurry weight; Preferred 0.4%;
3), filtering molding:
Above-mentioned slurries are input to the dehydration moulding of colding pressing in the die cavity, and base must wet; The wet base of gained be in the die cavity slurry weight 1.0～10.0%; Preferred 8.0%;
4), thermocompression forming and drying
Above-mentioned wet base is transferred in the hot-die, at 0.5～5.0kg/cm
3Pressure and 98～280 ℃ temperature under hot pressing 18～60s, and remove the moisture that produces in the hot pressing; Get fiber wallboard.
As the improvement that utilizes wet processing to prepare the method for fiber wallboard of the present invention: step 1) is: in raw material, add waterproofing agent and/or fire retardant and water and dredge slurry, evenly stir mixed pulp; Waterproofing agent is 2.0%～15.0% of a raw material dry weight, preferred 2.5%～9.0%; Fire retardant is 1.0%～45.0% of a raw material dry weight, preferred 18.0%～28.0%.
Improve as the another kind of the method that wet processing prepares fiber wallboard that utilizes of the present invention: waterproofing agent and/or fire retardant are added water dilute, fully after the dissolving spray coating liquor; The wet base of step 3) gained is sprayed first with above-mentioned spray coating liquor; And then the thermocompression forming that carries out step 4) is with dry, and carries out the spray once more of spray coating liquor in step 4) simultaneously; Twice used waterproofing agent total amount of spray be in the die cavity raw material dry weight 2.0%～15.0%, preferred 2.5%～9.0%; Twice used fire retardant total amount of spray be in the die cavity raw material dry weight 1.0%～45.0%, preferred 18.0%～28.0%.
As the further improvements in methods of utilizing wet processing to prepare fiber wallboard of the present invention: non-wood type natural plant fibre slurry is bamboo pulp, cane syrup, straw pulp, reed pulp or secondary stock; The grass slurry adopts grass stalk or gramineous lawn to make.The manufacture craft of grass slurry is as follows: grass stalk after will drying earlier or gramineous lawn removal of impurities, be ground into the length of 1～5cm then, and the 60～72h that is soaked in water again utilizes kneading or grinding leaser to make the grass slurry.The grass stalk is rice straw, maize straw, wheat stalk, corncob, broomcorn straw or barley stalk, and gramineous lawn is Festuca Arundinacea, rye grass or annual bluegrass.
As the further improvements in methods of utilizing wet processing to prepare fiber wallboard of the present invention: fire retardant is organic silicon fibre retardant (particularly water-soluble organic silicon fire retardant), phosphorus-nitrogen containing flame retardant or inorganic combustion inhibitor; Waterproofing agent is organosilicon series waterproofing agent or environment-friendly type waterproofing agent;
Organic silicon fibre retardant for example can be selected SFR10, polysiloxanes fire retardant of GE company etc. for use;
Phosphorus-nitrogen containing flame retardant for example can be selected the rich FR2003 of chemical company that seizes for use, the water-soluble flame retardant FR-PN of the big chemical company in sea, Qingdao City etc.;
Inorganic combustion inhibitor for example can be selected the ZR-BB02 of aluminium hydroxide, magnesium hydroxide, Firebrake ZB, borax, the long-range chemical assistant in Hangzhou factory etc. for use;
Organosilicon series waterproofing agent for example can be selected dodecyl trimethoxy silane (DTS), Methyl Hydrogen Polysiloxane Fluid, hydroxy silicon oil for use;
The environment-friendly type waterproofing agent for example can be selected the waterproofing agent FT-310A of Hangzhou long-range chemical assistant factory and the LZ19-06 class Cypres that the sticking factory of system is very done on waterproofing agent T-556, the waterproofing agent CH-2 of HangZhou HangHua BoMo paper Chemicals products Co., Ltd, the full pool, Pinghu, the cationic neutral sizing agent of HA-321 of Tianjin Synthetic Material Industry Research Institute development etc. for use.
As the further improvements in methods of utilizing wet processing to prepare fiber wallboard of the present invention: step 4) is hot pressing 18～60s under the temperature of the pressure of 1.5～2.5kg/cm3 and 170～265 ℃.
As the further improvements in methods of utilizing wet processing to prepare fiber wallboard of the present invention: step 3) is colded pressing at the pressure of 0.5～2.0Kg/cm3.
Adopt the preparation method of fiber wallboard of the present invention, have following advantage:
1, owing to utilize non-wood type natural plant fibre slurry such as cane syrup, reed pulp, bamboo pulp, straw pulp to be main raw material, the grass that has utilized grass stalk or gramineous lawn to make is starched as auxiliary material; These raw material sources are extensive, storage greatly, all belongs to renewable resource, and for example, Chinese annual agricultural crop straw output reaches 6.2 hundred million tons more than, about 4,000 ten thousand tons of bagasse annual production; Therefore method of the present invention has that raw material is easy to get, characteristics with low cost.The present invention avoids having used wood pulp as raw material, contributes to preserving the ecological environment.Fiber wallboard of the present invention reaches the requirement of the indoor decoration plate among the medium-density plate GB GB11718 of the same type, and wherein content of formaldehyde is zero, is a kind of novel environmental protection goods, is particularly suitable for interior decoration.
2, owing in raw material, added suitable fire retardant and waterproofing agent, and adopt special process of the present invention, guaranteed the abundant absorption of waterproofing agent and fire retardant, simple to operate, can effectively control the use amount of waterproofing agent and fire retardant, workable; The fiber wallboard that has not only guaranteed gained has good water proof fire retardant function, can also effectively avoid the production process pollution on the environment, has also reduced production cost simultaneously.The selection of fire retardant and waterproofing agent is the principle of not repelling mutually according to water-soluble feature and both.
3, made full use of the good advantage of grass starch deflection that non-wood type natural plant fibre slurry adhesion is strong and utilize kneading or grinding leaser to make, when reducing cost, improve the intensity of goods, thereby guaranteed to produce the fiber wallboard of certain thickness and intensity.
4, owing to adopted special process of the present invention, therefore can overcome the defective that dry process need add adhesive, also can overcome conventional wet technology and can not produce defective with certain thickness stereo product.
5, utilize particular surface on the hot pressing die, can make the front of fiber wallboard form exquisite pattern, not only can play the effect in the border of beautifying ring, can also reach the effect of sound-absorption and heat-insulation with three-dimensional convex-concave sense.
Adopt special process of the present invention, the thickness that can make the fiber wallboard of gained is 1.2～10mm, and the stereo concave-convex pattern height in fiber wallboard front reaches 5～100mm, and the convex-concave degree of common wallpaper is below 0.5mm.
The fiber wallboard main performance index that adopts the inventive method to produce is as follows: content of formaldehyde is almost nil, reaches the E0 level, (and not detecting these pathogenic carcinogens of radon, benzene, ammonia and trichloro-ethylene), compression strength 〉=200Mpa; Heat transfer coefficient≤0.020W/m
2K; High temperature dimensional stability≤0.2%.The final detection data of following embodiment all meet above-mentioned performance indications.Include the fiber wallboard of waterproofing agent and fire retardant, water proofing property meets the examination criteria of GB13341-2003 and GB/T1540-2002, and flame retardant effect meets the national examination criteria of GB/T 5464-1999 and GB/T 8627-1999.
In sum, the fiber wallboard that adopts the inventive method to produce has the specific of lightweight, sound-absorbing and effect of heat insulation, is a kind of real Green Product.Simultaneously, such wallboard has unique convex-concave design, forms pattern elegant in appearance, has good artistic effect, thereby, can meet modern life demand.
The specific embodiment
Below in conjunction with embodiments of the invention invention is further elaborated, but does not limit the present invention.
Embodiment 1, a kind of method of utilizing wet processing to prepare fiber wallboard, carry out following steps successively:
1, slurrying:
The primary colors bamboo pulp of dry weight 90% that will be by commercial acquisition adds beater, adds water and dredges slurry 20min, and beating degree is 14～15SR (beating degree); Change over to then in the prescription pond and stir 5min, get mixed pulp; The dry weight of primary colors bamboo pulp accounts for 3% of mixed pulp weight.
2, storage slurry:
Above-mentioned mixed pulp is put into pulp storage tank, convert the water dilution, and, get slurries with after the even stirring of the agitator of 10～12r/min; The dry weight of described primary colors bamboo pulp accounts for 0.3% of slurry weight.
3, filtering molding:
Homogenate after making is transported in the die cavity of the full-automatic pulp-molding make-up machine that Hangzhou Eurasian equipment Co., Ltd produces by pipeline, with vacuum filtration method suction strainer, uses 1.0Kg/cm
3Pressure, elder generation's press filtration in die cavity falls to account for the moisture of slurry weight 90%, and base must wet; Weight that promptly should wet base be in the die cavity slurry weight 10%.
4, thermocompression forming and drying
Above-mentioned wet base is transferred to shaping and drying in the hot-die of this make-up machine, the upper and lower mould of hot pressing is at 1.5Kg/cm
3The effect of hot pressing mold clamping force under fit tightly, the moisture content in the wet base is siphoned away by hot pressing counterdie vacuum after vaporizing; Hot pressing patrix temperature is controlled at 180 ℃ ± 2 ℃, and hot pressing counterdie temperature is controlled at 200 ℃, and total hot pressing time is 30s; Get goods (being fiber wallboard).
5, side cut and check finished product
After thermocompression forming was finished, compressed air blew to goods on the conveyer belt, delivered to the side cutter cuts burr again, last quality inspection, packing warehouse-in.This embodiment mould therefor size is 46 * 46cm, and the plate body thickness of fiber wallboard is 9mm; Concavo-convex height is 5mm.The stereo concave-convex pattern can change according to mould, and present embodiment is designed to the China knot pattern, but is not limited to this pattern.
The compression strength of this fiber wallboard is 〉=200N that its plane tensile strength is 0.78Mpa; Plate body density is 0.68g/cm
3
Embodiment 2, a kind of method of utilizing wet processing to prepare fiber wallboard are adjusted into following content with the slurrying of step 1:
1, slurrying:
The primary colors bamboo pulp of dry weight 90% that will be by commercial acquisition adds beater, adds water and dredges slurry 20min, and beating degree is 14～15SR (beating degree); Change over to then in the prescription pond and stir 5min, add the waterproofing agent of primary colors bamboo pulp dry weight 5% and the fire retardant of raw material dry weight 20% again, behind the agitator stirring 6min with per minute 10 commentaries on classics, get mixed pulp; The dry weight of primary colors bamboo pulp accounts for 3% of mixed pulp weight.
The ZR-BB01 fire retardant that the FT-556 waterproofing agent that waterproofing agent for example can select for use Hangzhou long-range chemical assistant factory to produce, fire retardant for example can select for use Hangzhou long-range chemical assistant factory to produce.
Select different moulds up and down for use, all the other contents are with embodiment 1.
The thickness of gained fiber wallboard is 2.5mm; Concavo-convex height is 5mm.
This fiber wallboard compression strength is 〉=200N, and its plane tensile strength is 0.71Mpa, and plate body density is 0.69g/cm
3
Water proofing property meets the examination criteria of GB13341-2003 and GB/T1540-2002, and flame retardant effect meets the national examination criteria of GB/T 5464-1999 and GB/T 8627-1999.
Embodiment 3, a kind of method of utilizing wet processing to prepare fiber wallboard, make the slurrying of step 1 into following content:
1, slurrying:
Waterproofing agent and fire retardant are joined in the Object storing drum in proportion, add the water stirring and make its dissolving, behind agitator stirring 6min, add the primary colors bamboo pulp of dry weight 90%, thin up is dredged slurry, fully stirs in holding stock tank, behind the 20min, gets mixed pulp; Waterproofing agent is 2.5% of a primary colors bamboo pulp dry weight, and fire retardant is 18% of a primary colors bamboo pulp dry weight; The dry weight of primary colors bamboo pulp accounts for 3% of mixed pulp weight.
Select the mould up and down with relief pattern for use, all the other contents are all with embodiment 2.
The thickness of fiber wallboard is 2.5mm; Concavo-convex height is 5mm.
The fiber wallboard compression strength that forms be 〉=200N, its plane tensile strength is 0.73Mpa, plate body density is 0.70g/cm
3
Its water proofing property and flame retardant effect all meet national examination criteria.
Embodiment 4, a kind of method of utilizing wet processing to prepare fiber wallboard, carry out following steps successively:
1, preliminary treatment:
Broomcorn straw is dried the length that is ground into 1～5cm after the removal of impurities, and the 60～72h that is soaked in water again puts into kneading or grinding leaser, and high dense mill is rubbed mill with the hands and divided silk to become a certain density mechanical pulp (being the broomcorn straw mechanical pulp);
In this broomcorn straw mechanical pulp, the dry weight of broomcorn straw is 10%.
2, slurrying:
The broomcorn straw mechanical pulp (as the grass slurry) of the primary colors bamboo pulp and the dry weight 10% of dry weight 60% is mixed according to 1: 1 dry weight weight ratio, become raw material; Be put in the beater, add water and dredge slurry 25min, beating degree is 14～15SR (beating degree); Change over to then in the pond of filling a prescription, add the waterproofing agent of raw material dry weight 9% and the fire retardant of raw material dry weight gross weight 25%, behind the agitator stirring 7min with per minute 10 commentaries on classics, get mixed pulp; The dry weight of the dry weight of primary colors bamboo pulp+broomcorn straw mechanical pulp=raw material dry weight, the raw material dry weight accounts for 5% of mixed pulp weight.
3, storage slurry:
Above-mentioned mixed pulp is put into pulp storage tank, convert the water dilution, and, get slurries with after the even stirring of the agitator of 10～12r/min; The dry weight of described raw material accounts for 0.4% of slurry weight;
4, filtering molding:
Slurries after making are transported in the die cavity of the full-automatic pulp-molding make-up machine that Hangzhou Eurasian equipment Co., Ltd produces by pipeline, with vacuum filtration method suction strainer, use 1.0Kg/cm
3Pressure, elder generation's press filtration in die cavity falls to account for the moisture of slurry weight 99%, and base must wet; Weight that promptly should wet base be in the die cavity slurry weight 1%.
5, thermocompression forming and drying
Above-mentioned wet base is transferred to shaping and drying in the hot-die of this make-up machine, the upper and lower mould of hot pressing is at 1.5Kg/cm
3The effect of hot pressing mold clamping force under fit tightly, the moisture content in the wet base is siphoned away by hot pressing counterdie vacuum after vaporizing; Hot pressing patrix temperature is controlled at 180 ℃ ± 2 ℃, and hot pressing counterdie temperature is controlled at 200 ℃, and total hot pressing time is 18s; Get goods.
6, side cut and check finished product
After thermocompression forming was finished, compressed air blew to goods on the conveyer belt, delivered to the side cutter cuts burr, last quality inspection, packing warehouse-in.
The thickness of fiber wallboard is 2.5mm; Concavo-convex height is 5mm.
This fiber wallboard compression strength is 〉=200N, and its plane tensile strength is 0.67Mpa, and plate body density is 0.64g/cm
3
Water proofing property and flame retardant effect all meet national examination criteria.
Embodiment 5, a kind of method of utilizing wet processing to prepare fiber wallboard, carry out following steps successively:
1, preliminary treatment:
Be equal to embodiment 4.In this broomcorn straw mechanical pulp, the dry weight of broomcorn straw is 40%.
2, slurrying:
The primary colors bamboo pulp of dry weight 60% and the broomcorn straw mechanical pulp of dry weight 40% are mixed according to 3: 2 dry weight weight ratio, become raw material, be put in the beater, add water and dredge slurry 25min, beating degree is 14～15SR (beating degree); Change over to then in the pond of filling a prescription, add the waterproofing agent of raw material dry weight 8%, behind the agitator stirring 5min with per minute 10 commentaries on classics, get mixed pulp; The dry weight of the dry weight of primary colors bamboo pulp+broomcorn straw mechanical pulp=raw material dry weight, the raw material dry weight accounts for 5% of mixed pulp weight.
3, storage slurry:
Above-mentioned mixed pulp is put into pulp storage tank, convert the water dilution, and, get slurries with after the even stirring of the agitator of 10～12r/min; Described raw material dry weight accounts for 0.3% of slurry weight;
4, filtering molding:
Slurries after making are transported in the die cavity of the full-automatic pulp-molding make-up machine that Hangzhou Eurasian equipment Co., Ltd produces by pipeline, with vacuum filtration method suction strainer, use 1.5Kg/cm
3Pressure, elder generation's press filtration in die cavity falls to account for the moisture of slurry weight 95%, and base must wet; Weight that promptly should wet base be in the die cavity slurry weight 5%.
5, thermocompression forming and drying
Above-mentioned wet base is transferred to shaping and drying in the hot-die of this make-up machine, the upper and lower mould of hot pressing is at 1.5Kg/cm
3The effect of hot pressing mold clamping force under fit tightly, the moisture content in the wet base is siphoned away by the vacuum of hot pressing counterdie after vaporizing; Hot pressing patrix temperature is controlled at 180 ℃ ± 2 ℃, and hot pressing counterdie temperature is controlled at 200 ℃, and total hot pressing time is 20s; Get goods.
6, side cut and check finished product
After thermocompression forming was finished, compressed air blew to goods on the conveyer belt, delivered to the side cutter cuts burr, last quality inspection, packing warehouse-in.
The thickness of fiber wallboard is 2.5mm; Concavo-convex height is 5mm.
This fiber wallboard compression strength is 〉=200N, and its plane tensile strength is 0.69Mpa, and plate body density is 0.65g/cm
3
Water proofing property meets national examination criteria.
Embodiment 6, a kind of method of utilizing wet processing to prepare fiber wallboard, carry out following steps successively:
1, preliminary treatment:
Wheat stalk is dried the length that is ground into 1～5cm after the removal of impurities, and the 60h that is soaked in water again puts into kneading or grinding leaser, and high dense mill is rubbed mill with the hands and divided silk to become a certain density mechanical pulp (being the wheat stalk mechanical pulp).
In this wheat stalk mechanical pulp, the dry weight of wheat stalk is 40%.
2, slurrying:
The wheat stalk mechanical pulp (as the grass slurry) of the bamboo pulp and the dry weight 40% of dry weight 60% is mixed according to 1: 1.5 dry weight weight ratio, become raw material, be put in the beater, add water and dredge slurry 30min, beating degree is 14～15SR (beating degree); Change over to then in the prescription pond, behind the agitator stirring 7min with per minute 10 commentaries on classics, get mixed pulp; The raw material dry weight accounts for 4% of mixed pulp weight.
The dry weight of the dry weight of bamboo pulp+wheat stalk mechanical pulp=raw material dry weight.
3, storage slurry:
Above-mentioned mixed pulp is put into pulp storage tank, convert the water dilution, and, get slurries with after the even stirring of the agitator of 10～12r/min; Described raw material dry weight accounts for 0.5% of slurry weight;
4, filtering molding:
Slurries after making are transported in the die cavity of the full-automatic pulp-molding make-up machine that Hangzhou Eurasian equipment Co., Ltd produces by pipeline, with vacuum filtration method suction strainer, use 1.0Kg/cm
3Pressure, elder generation's press filtration in die cavity falls to account for the moisture of slurry weight 99%, and base must wet.
5, make spray coating liquor:
The waterproofing agent of raw material dry weight gross weight 5% and the fire retardant of raw material dry weight gross weight 18% fully are dissolved in the water, and for example can control the mass concentration of waterproofing agent in spray coating liquor is 10%.
6, spray first:
Half of above-mentioned spray coating liquor is sprayed on all wet bases equably, i.e. used spray coating liquor=above-mentioned steps 5 on each wet base) quantity of the wet base of spray coating liquor ÷ 2 ÷ of gained.
7, thermocompression forming and drying
Wet base behind the above-mentioned spray is first transferred to shaping and drying in the hot-die of this make-up machine, and the upper and lower mould of hot pressing is at 1.5Kg/cm
3The effect of hot pressing mold clamping force under fit tightly, in the time of hot pressing the wet base in the hot-die is sprayed once more, second half of above-mentioned spray coating liquor is sprayed on all wet bases equably; Moisture content in the wet base is siphoned away by hot pressing counterdie vacuum after vaporizing; Hot pressing patrix temperature is controlled at 180 ℃ ± 2 ℃, and hot pressing counterdie temperature is controlled at 200 ℃, and total hot pressing time is 25s; Get goods.
8, side cut and check finished product
After thermocompression forming was finished, compressed air blew to goods on the conveyer belt, delivered to the side cutter cuts burr, last quality inspection, packing warehouse-in.
The thickness of fiber wallboard is 2.5mm; Concavo-convex height is 5mm.
This fiber wallboard compression strength is 〉=200N, and its plane tensile strength is 0.63Mpa, and plate body density is 0.62g/cm
3
Water proofing property and flame retardant effect all meet national examination criteria.
Embodiment 7, a kind of method of utilizing wet processing to prepare fiber wallboard
The rice straw mechanical pulp of handling well that the conversion dry weight is respectively 70% primary colors cane syrup and 30% mixes according to 2: 1 dry weight weight ratio, becomes raw material; The dry weight of the dry weight of primary colors cane syrup+rice straw mechanical pulp=raw material dry weight; Raw material is put in and adds water in the beater and dredge slurry 30min, then the slurries after above-mentioned the discongesting is changed in the prescription pond, adds after waterproofing agent and fire retardant stir 10min again, and waterproofing agent is 9% of a raw material dry weight, and fire retardant is 25% of a raw material dry weight, gets mixed pulp; Mixed pulp is put into pulp storage tank, and thin up accounts for 0.35% of mixed pulp weight to the raw material dry weight.Hot pressing patrix temperature is controlled at 240 ℃, and the counterdie temperature is controlled at 260 ℃, and hot pressing time is 20s.All the other all are equal to embodiment 4.
The thickness of fiber wallboard is 2.5mm; Concavo-convex height is 5mm.
This fiber wallboard compression strength is 〉=200N, and its plane tensile strength is 0.66Mpa, and plate body density is 0.61g/cm
3
Water proofing property and flame retardant effect all meet national examination criteria.
Embodiment 8, a kind of method of utilizing wet processing to prepare fiber wallboard,
Changing the 60% primary colors bamboo pulp of the dry weight among the embodiment 4 into dry weight is 77% white cane syrup, changes the broomcorn straw mechanical pulp of dry weight 10% into dry weight 23% wheat stalk mechanical pulp; Mix according to 1: 1 dry weight weight ratio above-mentioned 2, do not add waterproofing agent and fire retardant.The patrix temperature is controlled at 110 ℃ during hot pressing, and hot pressing counterdie temperature is controlled at about 120 ℃, and total hot pressing time is 60s.All the other all are equal to embodiment 4.
The thickness of fiber wallboard is 2.5mm; Concavo-convex height is 5mm.
This fiber wallboard compression strength is 〉=200N, and its plane tensile strength is 0.63Mpa, and plate body density is 0.60g/cm
3
Embodiment 9, a kind of method of utilizing wet processing to prepare fiber wallboard,
Change the 60% primary colors bamboo pulp of the dry weight among the embodiment 4 into dry weight 90% white reed pulp, change the broomcorn straw mechanical pulp of dry weight 10% into dry weight 10% maize straw mechanical pulp; Mix according to 1: 1 dry weight weight ratio above-mentioned 2, add the waterproofing agent of raw material dry weight 10% and the fire retardant of raw material dry weight gross weight 30%.All the other are with embodiment 4.
The thickness of fiber wallboard is 2.5mm; Concavo-convex height is 5mm.
This fiber wallboard compression strength is 〉=200N, and its plane tensile strength is 0.64Mpa, and plate body density is 0.63g/cm
3
Water proofing property and flame retardant effect all meet national examination criteria.
At last, it is also to be noted that what more than enumerate only is several specific embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (10)
1, a kind of method of utilizing wet processing to prepare fiber wallboard is characterized in that may further comprise the steps successively:
1), slurrying:
Non-wood type natural plant fibre slurry and grass slurry are mixed according to 1: 0～1.5 dry weight weight ratio, become raw material; Thin up is dredged slurry in above-mentioned raw materials, gets mixed pulp after evenly stirring; The raw material dry weight accounts for 3.0～5.0% of mixed pulp weight;
2), storage slurry:
Above-mentioned mixed pulp is put into pulp storage tank, convert the water dilution, after evenly stirring, get slurries; Described raw material dry weight accounts for 0.3～0.6% of slurry weight;
3), filtering molding:
Above-mentioned slurries are input to the dehydration moulding of colding pressing in the die cavity, and base must wet; The wet evil idea of gained be in the die cavity slurry weight 1.0～10.0%;
4), thermocompression forming and drying
Above-mentioned wet base is transferred in the hot-die, at 0.5～5.0kg/cm
3Pressure and 98～280 ℃ temperature under hot pressing 18～60s, and remove the moisture that produces in the hot pressing; Get fiber wallboard.
2, the method for utilizing wet processing to prepare fiber wallboard according to claim 1, it is characterized in that: described step 1) is: in raw material, add waterproofing agent and/or fire retardant and water and dredge slurry, evenly stir mixed pulp; Waterproofing agent is 2.0%～15.0% of a raw material dry weight, and fire retardant is 1.0%～45.0% of a raw material dry weight.
3, the method for utilizing wet processing to prepare fiber wallboard according to claim 1 is characterized in that: waterproofing agent and/or fire retardant are added water dilute, fully after the dissolving spray coating liquor; The wet base of step 3) gained is sprayed first with above-mentioned spray coating liquor; And then the thermocompression forming that carries out step 4) is with dry, and carries out the spray once more of spray coating liquor in step 4) simultaneously; Twice used waterproofing agent total amount of spray be in the die cavity raw material dry weight 2.0%～15.0%, twice used fire retardant total amount of spray be in the die cavity raw material dry weight 1.0%～45.0%.
4, according to claim 2 or the 3 described methods of utilizing wet processing to prepare fiber wallboard, it is characterized in that: described non-wood type natural plant fibre slurry is bamboo pulp, cane syrup, straw pulp, reed pulp or secondary stock; The grass slurry adopts grass stalk or gramineous lawn to make.
5, the method for utilizing wet processing to prepare fiber wallboard according to claim 4 is characterized in that: the manufacture craft of described grass slurry is as follows:
Grass stalk after will drying earlier or gramineous lawn removal of impurities are ground into the length of 1～5cm then, and the 60～72h that is soaked in water again utilizes kneading or grinding leaser to make the grass slurry.
6, the method for utilizing wet processing to prepare fiber wallboard according to claim 5, it is characterized in that: described grass stalk is rice straw, maize straw, wheat stalk, corncob, broomcorn straw or barley stalk, and gramineous lawn is Festuca Arundinacea, rye grass or annual bluegrass.
7, prepare the method for fiber wallboard according to the wet processing that utilizes described in the claim 6, it is characterized in that: described fire retardant is organic silicon fibre retardant, phosphorus-nitrogen containing flame retardant or inorganic combustion inhibitor; Described waterproofing agent is organosilicon series waterproofing agent or environment-friendly type waterproofing agent.
8, the method for utilizing wet processing to prepare fiber wallboard according to claim 7 is characterized in that: described organic silicon fibre retardant is the water-soluble organic silicon fire retardant.
9, the method for utilizing wet processing to prepare fiber wallboard according to claim 8 is characterized in that: described step 4) is at 1.5～2.5kg/cm
3Pressure and 170～265 ℃ temperature under hot pressing 18～60s.
10, the method for utilizing wet processing to prepare fiber wallboard according to claim 9, it is characterized in that: described step 3) is at 0.5～2.0Kg/cm
3Pressure cold pressing.
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| CN106948224A (en) * | 2017-04-18 | 2017-07-14 | 东莞当纳利印刷有限公司 | A kind of preparation method of moulded paper pulp product |
| CN107012746A (en) * | 2017-05-22 | 2017-08-04 | 谷照林 | Respirable straw board manufacturing process |
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| CN107386013A (en) * | 2017-07-18 | 2017-11-24 | 安徽农业大学 | A kind of degradable straw board and preparation method thereof, application |
| CN108342932A (en) * | 2018-03-27 | 2018-07-31 | 沈阳大学 | A kind of preparation method of degradable stalk beverage suction pipe |
| CN111041886A (en) * | 2019-12-30 | 2020-04-21 | 永发（河南）模塑科技发展有限公司 | Process and equipment for preparing fine yellow pulp product formed by paper and plastic |
| CN111074660A (en) * | 2019-12-31 | 2020-04-28 | 二十五度加(广州)科技发展有限公司 | Degradable sugarcane pulp tableware and preparation method thereof |
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