CN105538450A - Fire retardant and application thereof - Google Patents
Fire retardant and application thereof Download PDFInfo
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- CN105538450A CN105538450A CN201610011159.2A CN201610011159A CN105538450A CN 105538450 A CN105538450 A CN 105538450A CN 201610011159 A CN201610011159 A CN 201610011159A CN 105538450 A CN105538450 A CN 105538450A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/40—Chemically modified polycondensates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
- C09J161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C09J161/32—Modified amine-aldehyde condensates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2240/00—Purpose of the treatment
- B27K2240/30—Fireproofing
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Forests & Forestry (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention relates to the technical field of wood processing, in particular to a fire retardant and application thereof. The fire retardant comprises, by weight, 25-35 parts of dicyandiamide, 30-40 parts of borax, 30-40 parts of boric acid, 10-15 parts of zinc borate, 10-20 parts of sodium silicate and 10-15 parts of antimonous oxide. The raw materials of the fire retardant have a synergistic flame retardant function, and the fire retardant has the advantages of being good in fire retardant effect, low in toxicity, good in smoke suppression performance and environmentally friendly, and is low in price. Fire retardant plywood prepared with the fire retardant can obviously improve the fire retardant performance, and can meet the requirements of the nationally standard C fireproof level, and the bonding strength and the maximum damage load are both similar to those of plywood manufactured without the fire retardant.
Description
Technical field
The present invention relates to wood processing technique field, be specifically related to a kind of fire retardant and application thereof.
Background technology
Due to the mankind excessive utilize timber, make the timber quantity of various famous and precious, large footpaths level fewer and feweri, therefore the mankind are accomplished in several ways the comprehensive utilization of timber.The birth of wood-based plate, indicates the beginning in timber processing modernization period, process is developed into from simple change log shapes and improves wood property.People, by plantation artificial forest, make various wood-based plate cutting down the timber got off from artificial forest, meet the needs of people to famous and precious timber, large footpath level timber with this.Timber is made wood-based plate, it maintains light, mechanical property is good etc. the characteristic of virgin wood, there is again breadth large simultaneously, structural good, easy construction; Rate of expand to shrink is low, dimensionally stable, and material comparatively sawn timber is even, not easily the advantage such as strain cracking.
Wood-based plate be with timber or other non-wood plants for raw material, be separated into after various unit material through certain machining, apply or do not apply sheet material or the pressing of adhesive and other additive pressings.Wood-based plate mainly comprises glued board, particieboard and fiberboard three major types, wherein the intensity of glued board and volume stability best, also extensive in actual applications.Glued board is one of furniture, construction and decoration common used material.Wood-based plate is actually a kind of wood materials, is the combustible that ignition point is very low, and therefore usually need to add fire retardant and carry out flame treatment, the quality of fire retardant quality will affect wood-based plate fireproof effect.
In recent years, improving constantly with the awareness of the importance of fire prevention of people along with glued board output constantly increases, market is occurring multiple fire retardant.Although fire retardant is comparatively extensive in the application of glued board, still there is following problem in existing fire retardant: flame retardant effect is not obvious, cost is higher, resistance leachability and resistance to ag(e)ing is poor, to problems such as the Effect on Mechanical Properties of glued board are large.Therefore, develop a kind of novel fire retardant with high performance-price ratio to be very important.
The information being disclosed in this background technology part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of glued board fire retardant and application thereof.
Technical scheme provided by the invention is:
A kind of fire retardant, comprises the raw material of following parts by weight: dicyandiamide 25-35 part, borax 30-40 part, boric acid 30-40 part, Firebrake ZB 10-15 part, sodium metasilicate 10-20 part and antimony oxide 10-15 part.
As preferably, described fire retardant, comprises the raw material of following parts by weight: dicyandiamide 25 parts, borax 35 parts, boric acid 40 parts, Firebrake ZB 12 parts, sodium metasilicate 15 parts and antimony oxide 12 parts.
Present invention also offers the preparation method of described fire retardant, comprise the following steps: take dicyandiamide 25-35 part, borax 30-40 part, boric acid 30-40 part, Firebrake ZB 10-15 part, sodium metasilicate 10-20 part and antimony oxide 10-15 part, add pulverizer respectively and be crushed to 120-150 order, then each component is mixed, finally add water, preparation mass concentration is the retardant solution of 10-15%.
Present invention also offers described fire retardant and producing the application in flame-retardant plywood, comprise following production stage:
(1) knot is selected few, the veneer that defect is few, cleaning surface, drying the veneers to moisture content is 8-10%, put into again mass concentration be 10-15% retardant solution soak 24 hours, then take out and dry, then carry out drying with rolling dryer, the moisture content controlling veneer is 12-15%;
(2) two sides of the veneer after step (1) process is applied modified urea-formaldehyde resin mediation glue, then ageing 8-12min;
(3) veneer after step (2) process is carried out assembly according to a conventional method, then carry out precompressed and hot-pressing processing, obtain burr flame-retardant plywood; The technological parameter of described precompressed is: squeeze time 70-90min, pressure 1.3-1.5MPa, normal temperature; The technological parameter of described hot pressing is: hot pressing time 7-9min, pressure 1.4-1.6MPa, hot pressing temperature are 110-130 DEG C;
(4) the burr flame-retardant plywood that above-mentioned steps (3) obtains is carried out cutting edge, obtain specification flame-retardant plywood, finally sanding, facing are carried out to specification flame-retardant plywood, obtain flame-retardant plywood.
As preferably, it is by 65-75 part modified urea-formaldehyde resin glue, 1.2 parts of NH4Cl and 9.5-11.25 part flour that described modified urea-formaldehyde resin is in harmonious proportion the preparation method of glue, they is fully mixed, and obtains modified urea-formaldehyde resin and be in harmonious proportion glue after leaving standstill 20min.
As preferably, described modified urea-formaldehyde resin glue is that the formaldehyde in glue container is heated to 35 DEG C, adds NaOH and adjusts pH to 8.3-8.5, then add the urea of formaldehyde quality 36%, is warming up to 70 DEG C and stops heating, make temperature naturally rise to 85-88 DEG C, reaction 40min; In 25-30min, slowly drip mass concentration is the formic acid solution of 20%, the pH value of reactant liquor is adjusted to 4.6, controls reaction time 60-80min, temperature 89-91 DEG C, under 30 DEG C of conditions, measure viscosity with painting four glasss, measure 1 time every 5-10min, terminal viscosity controls at 19-20s; Add the crosslinking agent of 2% of formaldehyde quality again, after stirring 10min, then add the urea of formaldehyde quality 16.5%, control reaction temperature 83-85 DEG C, reaction 30min, be cooled to 70 DEG C; Finally add the urea of formaldehyde quality 20%, reaction 30min, is cooled to less than 45 DEG C, adjusts PH to 8.5-8.8 with NaOH, stirs 10min and samples discharging, obtain modified urea-formaldehyde resin glue.
As preferably, the technological parameter of the precompressed described in step (3) is: squeeze time 70-90min, pressure 1.3-1.5MPa, temperature are normal temperature.
As preferably, the technological parameter of the hot pressing described in step (3) is: hot pressing time 7-9min, pressure 1.4-1.6MPa, hot pressing temperature are 110-130 DEG C.
Compared with prior art, the present invention has following beneficial effect:
1. between each raw material of fire retardant of the present invention, there is cooperative flame retardant effect, there is good flame retardation effect, low toxicity, the good and eco-friendly advantage of smoke-suppressing, and low price.
2. the flame-retardant plywood using fire retardant of the present invention to prepare can significantly improve the fire resistance of flame-retardant plywood, the requirement of the C level fire-protection rating that can be up to state standards; Its bonding strength and maximal destruction load are all close to the glued board not using this fire retardant process to make.
Detailed description of the invention
Below in conjunction with embodiment, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of detailed description of the invention.
Clearly represent unless otherwise other, otherwise in whole description and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or part, and do not get rid of other element or other part.
embodiment 1:
A kind of fire retardant, comprises the raw material of following parts by weight: dicyandiamide 25 parts, borax 30 parts, boric acid 30 parts, Firebrake ZB 10 parts, sodium metasilicate 10 parts and antimony oxide 10 parts.
The preparation method of described fire retardant, comprise the following steps: take dicyandiamide, borax, boric acid, Firebrake ZB, sodium metasilicate and antimony oxide by weight, add pulverizer respectively and be crushed to 120 orders, then each component is mixed, finally add water, preparation mass concentration is the retardant solution of 10%.
The application in flame retardant fibre board produced by described fire retardant, comprises following production stage:
(1) knot is selected few, the veneer that defect is few, cleaning surface, drying the veneers to moisture content is 8%, then put into mass concentration be 10% retardant solution soak 24 hours, then take out dry, carry out drying with rolling dryer again, the moisture content controlling veneer is 12%;
(2) two sides of the veneer after step (1) process is applied modified urea-formaldehyde resin mediation glue, then ageing 8min; The preparation method of described modified urea-formaldehyde resin mediation glue is by 65 parts of modified urea-formaldehyde resin glues, 1.2 parts of NH4Cl and 9.5 part flour, they is fully mixed, and obtains modified urea-formaldehyde resin mediation glue after leaving standstill 20min; Described modified urea-formaldehyde resin glue is that the formaldehyde in glue container is heated to 35 DEG C, adds NaOH and adjusts pH to 8.3, then add the urea of formaldehyde quality 36%, is warming up to 70 DEG C and stops heating, make temperature naturally rise to 85 DEG C, reaction 40min; In 25min, slowly drip mass concentration is the formic acid solution of 20%, and the pH value of reactant liquor is adjusted to 4.6, controls reaction time 60min, temperature 89 DEG C, and under 30 DEG C of conditions, measure viscosity with painting four glasss, measure 1 time every 5min, terminal viscosity controls at 19s; Add the crosslinking agent of 2% of formaldehyde quality again, after stirring 10min, then add the urea of formaldehyde quality 16.5%, control reaction temperature 83 DEG C, reaction 30min, be cooled to 70 DEG C; Finally add the urea of formaldehyde quality 20%, reaction 30min, is cooled to less than 45 DEG C, adjusts PH to 8.5 with NaOH, stirs 10min and samples discharging, obtain modified urea-formaldehyde resin glue;
(3) veneer after step (2) process is carried out assembly according to a conventional method, then carry out precompressed and hot-pressing processing, obtain burr flame-retardant plywood; The technological parameter of described precompressed is: squeeze time 70min, pressure 1.3MPa, temperature are normal temperature; The technological parameter of described hot pressing is: hot pressing time 7min, pressure 1.4MPa, hot pressing temperature are 110 DEG C;
(4) the burr flame-retardant plywood that above-mentioned steps (3) obtains is carried out cutting edge, obtain specification flame-retardant plywood, finally sanding, facing are carried out to specification flame-retardant plywood, obtain flame-retardant plywood.
embodiment 2:
A kind of fire retardant, comprises the raw material of following parts by weight: dicyandiamide 35 parts, borax 40 parts, boric acid 40 parts, Firebrake ZB 15 parts, sodium metasilicate 20 parts and antimony oxide 15 parts.
The preparation method of described fire retardant, comprise the following steps: take dicyandiamide, borax, boric acid, Firebrake ZB, sodium metasilicate and antimony oxide by weight, add pulverizer respectively and be crushed to 120 orders, then each component is mixed, finally add water, preparation mass concentration is the retardant solution of 10%.
The application in flame retardant fibre board produced by described fire retardant, comprises following production stage:
(1) knot is selected few, the veneer that defect is few, cleaning surface, drying the veneers to moisture content is 10%, then put into mass concentration be 15% retardant solution soak 24 hours, then take out dry, carry out drying with rolling dryer again, the moisture content controlling veneer is 15%;
(2) two sides of the veneer after step (1) process is applied modified urea-formaldehyde resin mediation glue, then ageing 12min; The preparation method of described modified urea-formaldehyde resin mediation glue is by 75 parts of modified urea-formaldehyde resin glues, 1.2 parts of NH4Cl and 11.25 part flour, they is fully mixed, and obtains modified urea-formaldehyde resin mediation glue after leaving standstill 20min; Described modified urea-formaldehyde resin glue is that the formaldehyde in glue container is heated to 35 DEG C, adds NaOH and adjusts pH to 8.5, then add the urea of formaldehyde quality 36%, is warming up to 70 DEG C and stops heating, make temperature naturally rise to 85-88 DEG C, reaction 40min; In 25-30min, slowly drip mass concentration is the formic acid solution of 20%, the pH value of reactant liquor is adjusted to 4.6, controls reaction time 80min, temperature 91 DEG C, under 30 DEG C of conditions, measure viscosity with painting four glasss, measure 1 time every 10min, terminal viscosity controls at 20s; Add the crosslinking agent of 2% of formaldehyde quality again, after stirring 10min, then add the urea of formaldehyde quality 16.5%, control reaction temperature 85 DEG C, reaction 30min, be cooled to 70 DEG C; Finally add the urea of formaldehyde quality 20%, reaction 30min, is cooled to less than 45 DEG C, adjusts PH to 8.8 with NaOH, stirs 10min and samples discharging, obtain modified urea-formaldehyde resin glue;
(3) veneer after step (2) process is carried out assembly according to a conventional method, then carry out precompressed and hot-pressing processing, obtain burr flame-retardant plywood; The technological parameter of described precompressed is: squeeze time 90min, pressure 1.5MPa, temperature are normal temperature; The technological parameter of described hot pressing is: hot pressing time 9min, pressure 1.6MPa, hot pressing temperature are 130 DEG C;
(4) the burr flame-retardant plywood that above-mentioned steps (3) obtains is carried out cutting edge, obtain specification flame-retardant plywood, finally sanding, facing are carried out to specification flame-retardant plywood, obtain flame-retardant plywood.
embodiment 3:
A kind of fire retardant, comprises the raw material of following parts by weight: dicyandiamide 30 parts, borax 35 parts, boric acid 35 parts, Firebrake ZB 12 parts, sodium metasilicate 15 parts and antimony oxide 12 parts.
The preparation method of described fire retardant, comprise the following steps: take dicyandiamide, borax, boric acid, Firebrake ZB, sodium metasilicate and antimony oxide by weight, add pulverizer respectively and be crushed to 120 orders, then each component is mixed, finally add water, preparation mass concentration is the retardant solution of 10%.
The application in flame retardant fibre board produced by described fire retardant, comprises following production stage:
(1) knot is selected few, the veneer that defect is few, cleaning surface, drying the veneers to moisture content is 9%, then put into mass concentration be 12% retardant solution soak 24 hours, then take out dry, carry out drying with rolling dryer again, the moisture content controlling veneer is 13%;
(2) two sides of the veneer after step (1) process is applied modified urea-formaldehyde resin mediation glue, then ageing 10min; The preparation method of described modified urea-formaldehyde resin mediation glue is by 70 parts of modified urea-formaldehyde resin glues, 1.2 parts of NH4Cl and 10 part flour, they is fully mixed, and obtains modified urea-formaldehyde resin mediation glue after leaving standstill 20min; Described modified urea-formaldehyde resin glue is that the formaldehyde in glue container is heated to 35 DEG C, adds NaOH and adjusts pH to 8.4, then add the urea of formaldehyde quality 36%, is warming up to 70 DEG C and stops heating, make temperature naturally rise to 86 DEG C, reaction 40min; In 28min, slowly drip mass concentration is the formic acid solution of 20%, and the pH value of reactant liquor is adjusted to 4.6, controls reaction time 70min, temperature 90 DEG C, and under 30 DEG C of conditions, measure viscosity with painting four glasss, measure 1 time every 8min, terminal viscosity controls at 19s; Add the crosslinking agent of 2% of formaldehyde quality again, after stirring 10min, then add the urea of formaldehyde quality 16.5%, control reaction temperature 83-85 DEG C, reaction 30min, be cooled to 70 DEG C; Finally add the urea of formaldehyde quality 20%, reaction 30min, is cooled to less than 45 DEG C, adjusts PH to 8.6 with NaOH, stirs 10min and samples discharging, obtain modified urea-formaldehyde resin glue;
(3) veneer after step (2) process is carried out assembly according to a conventional method, then carry out precompressed and hot-pressing processing, obtain burr flame-retardant plywood; The technological parameter of described precompressed is: squeeze time 80min, pressure 1.4MPa, temperature are normal temperature; The technological parameter of described hot pressing is: hot pressing time 8min, pressure 1.5MPa, hot pressing temperature are 120 DEG C;
(4) the burr flame-retardant plywood that above-mentioned steps (3) obtains is carried out cutting edge, obtain specification flame-retardant plywood, finally sanding, facing are carried out to specification flame-retardant plywood, obtain flame-retardant plywood.
embodiment 4: the performance evaluation of the flame-retardant plywood using fire retardant of the present invention to prepare
The performance measurement of the flame-retardant plywood that table 1 uses glued board fire retardant of the present invention to prepare
Note: contrast the glued board for not adding fire retardant, its preparation method is with embodiment 1-3.
As can be seen from Table 1, embodiment of the present invention 1-3 obtain flame-retardant plywood oxygen index value be all greater than 37%, be obviously better than contrasting (not using the glued board that fire retardant process is made), the requirement of the C level fire-protection rating that is up to state standards; Embodiment of the present invention 1-3 obtains the bonding strength of flame-retardant plywood and maximal destruction load all close to contrast (not using the glued board that fire retardant process is made).
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (8)
1. a fire retardant, is characterized in that, comprises the raw material of following parts by weight: dicyandiamide 25-35 part, borax 30-40 part, boric acid 30-40 part, Firebrake ZB 10-15 part, sodium metasilicate 10-20 part and antimony oxide 10-15 part.
2. fire retardant according to claim 1, is characterized in that, comprises the raw material of following parts by weight: dicyandiamide 25 parts, borax 35 parts, boric acid 40 parts, Firebrake ZB 12 parts, sodium metasilicate 15 parts and antimony oxide 12 parts.
3. the preparation method of fire retardant according to claim 1, it is characterized in that, comprise the following steps: take dicyandiamide 25-35 part, borax 30-40 part, boric acid 30-40 part, Firebrake ZB 10-15 part, sodium metasilicate 10-20 part and antimony oxide 10-15 part, add pulverizer respectively and be crushed to 120-150 order, then each component is mixed, finally add water, preparation mass concentration is the retardant solution of 10-15%.
4. producing the application in flame-retardant plywood according to the arbitrary described fire retardant of claim 1-3, it is characterized in that, comprise following production stage:
(1) knot is selected few, the veneer that defect is few, cleaning surface, drying the veneers to moisture content is 8-10%, put into again mass concentration be 10-15% retardant solution soak 24 hours, then take out and dry, then carry out drying with rolling dryer, the moisture content controlling veneer is 12-15%;
(2) two sides of the veneer after step (1) process is applied modified urea-formaldehyde resin mediation glue, then ageing 8-12min;
(3) veneer after step (2) process is carried out assembly according to a conventional method, then carry out precompressed and hot-pressing processing, obtain burr flame-retardant plywood;
(4) the burr flame-retardant plywood that above-mentioned steps (3) obtains is carried out cutting edge, obtain specification flame-retardant plywood, finally sanding, facing are carried out to specification flame-retardant plywood, obtain flame-retardant plywood.
5. the application in flame-retardant plywood produced by fire retardant according to claim 4, it is characterized in that: the preparation method of the modified urea-formaldehyde resin mediation glue described in step (2) is by 65-75 part modified urea-formaldehyde resin glue, 1.2 parts of NH4Cl and 9.5-11.25 part flour, they are fully mixed, after leaving standstill 20min, obtains modified urea-formaldehyde resin mediation glue.
6. the application in flame-retardant plywood produced by fire retardant according to claim 5, it is characterized in that: described modified urea-formaldehyde resin glue is that the formaldehyde in glue container is heated to 35 DEG C, add NaOH and adjust pH to 8.3-8.5, add the urea of formaldehyde quality 36% again, be warming up to 70 DEG C and stop heating, temperature is made naturally to rise to 85-88 DEG C, reaction 40min; In 25-30min, slowly drip mass concentration is the formic acid solution of 20%, the pH value of reactant liquor is adjusted to 4.6, controls reaction time 60-80min, temperature 89-91 DEG C, under 30 DEG C of conditions, measure viscosity with painting four glasss, measure 1 time every 5-10min, terminal viscosity controls at 19-20s; Add the crosslinking agent of 2% of formaldehyde quality again, after stirring 10min, then add the urea of formaldehyde quality 16.5%, control reaction temperature 83-85 DEG C, reaction 30min, be cooled to 70 DEG C; Finally add the urea of formaldehyde quality 20%, reaction 30min, is cooled to less than 45 DEG C, adjusts PH to 8.5-8.8 with NaOH, stirs 10min and samples discharging, obtain modified urea-formaldehyde resin glue.
7. fire retardant according to claim 4 is producing the application in flame-retardant plywood, it is characterized in that: the technological parameter of the precompressed described in step (3) is: squeeze time 70-90min, pressure 1.3-1.5MPa, temperature are normal temperature.
8. fire retardant according to claim 4 is producing the application in flame-retardant plywood, it is characterized in that: the technological parameter of the hot pressing described in step (3) is: hot pressing time 7-9min, pressure 1.4-1.6MPa, hot pressing temperature are 110-130 DEG C.
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| CN201610011159.2A CN105538450A (en) | 2016-01-08 | 2016-01-08 | Fire retardant and application thereof |
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| CN201610011159.2A CN105538450A (en) | 2016-01-08 | 2016-01-08 | Fire retardant and application thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106553248A (en) * | 2016-11-26 | 2017-04-05 | 防城港市林木良种繁育中心苗圃 | A kind of wood fire retardant and its application |
| CN108890825A (en) * | 2018-07-27 | 2018-11-27 | 天峨县平昌生态农业有限公司 | A kind of fire retardant for glued board |
| CN111272514A (en) * | 2020-03-25 | 2020-06-12 | 龙泉市亿龙竹木开发有限公司 | Production process and processing equipment of fireproof bamboo board |
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| CN101259629A (en) * | 2008-04-17 | 2008-09-10 | 上海大不同木业科技有限公司 | Wood fire retardant and wood veneer flame-proof processing technique |
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| CN108890825A (en) * | 2018-07-27 | 2018-11-27 | 天峨县平昌生态农业有限公司 | A kind of fire retardant for glued board |
| CN111272514A (en) * | 2020-03-25 | 2020-06-12 | 龙泉市亿龙竹木开发有限公司 | Production process and processing equipment of fireproof bamboo board |
| CN111272514B (en) * | 2020-03-25 | 2022-11-22 | 龙泉市亿龙竹木开发有限公司 | Production method and processing equipment of fireproof bamboo board |
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