CN103600380B - A kind of spontaneous mould process bamboo wood plasticizing recombinant material - Google Patents
A kind of spontaneous mould process bamboo wood plasticizing recombinant material Download PDFInfo
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- CN103600380B CN103600380B CN201310594927.8A CN201310594927A CN103600380B CN 103600380 B CN103600380 B CN 103600380B CN 201310594927 A CN201310594927 A CN 201310594927A CN 103600380 B CN103600380 B CN 103600380B
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Abstract
The present invention be adopt spontaneous mould process bamboo wood and fast growing wood manufacture plasticizing recombinant material method and, processing step divides 1) bamboo bundle and wood bundle are naturally mildewed 2-3 days under the environment being easy to fungus growth, or to weight-loss ratio 10-15%; 2) mould cleaning, drying are gone to the bamboo bundle gone mouldy and wooden Shu Jinhang; 3) dried bamboo bundle and wood bundle flood different molecular weight phenolic resin glue respectively, are then dried to moisture content 6-14%; 4) mat formation and be pressed into plate.Advantage: density of material is large, intensity is high, good toughness, good stability of the dimension; Corrosion resistant, resistance to worm, resistance is large, and the common plasticizing wood of strength ratio is high.Can be used for the outdoor use deck of building structure, automobile die, train backing plate, bearing material etc.
Description
Technical field
What the present invention relates to is a kind of method adopting spontaneous mould process bamboo wood and fast growing wood manufacture plasticizing recombinant material, belongs to the wood-based plate manufacturing technology field in wood working industry.
Background technology
Bamboo wood is rich in the nutriments such as starch and is easy to go mouldy because of it, fast growing wood also easily attracts the infringement of stain fungus.The biohazard initial stage of mould does not almost affect material, just has impact to presentation quality.Make us owing to going mouldy being difficult to accept, people stop the generation of going mouldy by various technology, but have ignored goes mouldy can improve the permeability of bamboo wood and timber, and the initial stage of especially going mouldy does not affect this advantage to fundamental strength.Based on this principle, the present invention utilizes the effect of going mouldy of spontaneous mould, improves bamboo wood permeability, increases resin impregnation, devises the plasticizing recombinant material of bamboo wood bundle impregnation compacting again after naturally going mouldy.The plasticizing recombinant material intensity that this method manufactures is larger, and water proofing property is better, and density can reach 1.2-1.35g/cm
3, not only as construction timber, can also be used as automobile die, the manufacture of housing pressing mold, and bearing, bush material etc.
Summary of the invention
What the present invention proposed is a kind of method adopting spontaneous mycotic culture process bamboo wood and fast growing wood manufacture plasticizing recombinant material, its objective is and bamboo wood and fast growing wood are made easy-to-handle pencil unit, by spontaneous mould process, improve unit permeability, and then with pf resin of low molecular weight to wooden Shu Jinhang soaking, pass through higher molecular weight phenolic resins again to bamboo bundle impregnation, after dry hot pressing, make highdensity plasticizing recombinant material.The plasticizing recombinant material of this technology manufacture both can be used for construction material, also can be used for bearing, bush material, also can be used for the wear-resisting and shock proof die-pressing section of car and boat manufacture.
Technical solution of the present invention: the method adopting spontaneous mould process bamboo wood and fast growing wood manufacture plasticizing recombinant material, comprises following processing step:
1) fresh Mao bamboo timber and fast growing wood are rolled into the bamboo bundle that thickness is less than 2mm, bamboo bundle and wood bundle can be through and be processed into thin microscler, horizontal separately continuous bamboo and wood bundle sheet also can be narrower single bamboo and wood bundle, width should be more than 4 times of thickness, and thickness is less than 2mm, bamboo bundle and wood bundle are microsclerly conducive to mould within the shortest time for thin, penetrate into 30% of bamboo bundle and wooden Shu Houdu, and consume nutriment and not deface and intensity; Thickness is greater than the bamboo wood bundle fungus growth of 2mm to 30% overlong time, and easily cause surface strength and destroy, thus reduce bamboo wood Shu Benshen intensity, the moisture content processing bamboo bundle and the wood bundle obtained answers more than 15%;
2) above-mentioned bamboo and wood bundle carries out mould and naturally cultivates in culturing room, humidity 90 ± 5%, temperature 25-35 DEG C, and the time is stop after surface mould occurs 2-3 days or the maximum over dry weight-loss ratio 8-15% of bamboo wood bundle; When avoiding weight-loss ratio excessive, inner generation is degraded, and causes bamboo wood beam intensity to decline, reduces manufactured goods intensity; Characteristic of going mouldy according to different fast growing wood seeds regulates humiture and time, to the fast growing wood not easily gone mouldy in a short time, can omit this step, directly carry out next step; Rotproofness good fast-growing Chinese fir do not need mycotic culture, can be directly used in combination with the bamboo bundle after processing that go mouldy;
3) restraint into the washing of 0.5-1% sodium acid carbonate to the bamboo bundle after going mouldy and wood, the intensity of the mycelia of removing surface attachment and metabolite thereof and not damaging cells wall; To the fast growing wood without spontaneous mould process, if timber self contains resin or the more assortment of inclusion, adopt 0.5-1% NaOH extracting process; After above-mentioned process, bamboo wood bundle is dried to moisture content 12-14%; Dried wood bundle, adopt solid content 33-70%, pH value 7-8.7, host molecule amount is the pf resin of low molecular weight impregnation of 500-850, bamboo Shu Caiyong molecular weight 1500-2800, solid content is impregnation after the phenolic resins of 45-60% dilutes a times, dilutes one times of liquid-solid ratio when adding impregnation process, is conducive to glue being uniformly distributed on bamboo bundle surface; The low-molecular-weight phenolic resins of wood Shu Caiyong can increase cell membrane infiltration, improves cell wall hardness, makes cork bundle hardening, is strengthen process; The phenolic resins that bamboo Shu Caiyong molecular weight is higher then utilizes larger molecule to strengthen macroscopical cell membrane parcel property, it is process that is toughness reinforcing and that strengthen, remain the toughness of bamboo wood, plasticizing recombinant material after such processing just has the advantage of high-strength and high ductility, avoids the shortcoming of the single enhancing toughness deficiency of unimodal molecular weight process; Drain after impregnation, glue gain in weight 18-35%; 50-80 DEG C is dried to moisture content 6-14%, as the moisture content 10-14% of skin-material, as the moisture content 6-10% of core material, be beneficial to the steam-energy rapid osmotic on top layer during hot pressing to sandwich layer, form the technique of steam injection pressing, very big shortening hardening time, prevent the long superficial charring of hot pressing time simultaneously;
4) after impregnation drying in bamboo wood Shu Jinhang a certain proportion of layer or interlayer mixing assembly can pressing board length direction orientation or mat formation at random and be pressed into plate; Paving structure comprises following five types: 1) bamboo bundle is upper and lower surface layer, and wood bundle is three layers of parallel orientation structure of sandwich layer; 2) bamboo bundle is upper and lower surface layer, and sandwich layer is that three layers of bamboo wood bundle mixing orientation are parallel to structure; 3) wood bundle is upper and lower surface layer, and bamboo bundle is three layers of parallel orientation structure of sandwich layer; 4) wood is restrainted as upper and lower surface layer, and sandwich layer is that three layers of bamboo wood bundle mixing orientation are parallel to structure; 5) after bamboo bundle and wood bundle mix, parallel orientation or random paving structure;
5) by above-mentioned shaping slab of mating formation at 140-150 DEG C, pressure 8.0-20MPa, it is shaping that time: 1.1-1.8min/mm is hot pressed into plate or employing heat cure of colding pressing, the plasticizing recombinant material ageing-resistant performance that this heat pressing process is made is better, high and low temperature resistance is better, and in-130 DEG C of-130 DEG C of temperature, performance is more stable;
To cold pressing solidification, that the bamboo bundle of impregnation and wood bundle are dried to 150 DEG C, cold press is proceeded to immediately before resin solidification, under 8.0-10.0MPa pressure, the pressurize of press-in mould, pressing mold is fixedly heated to resin solidification, takes out finished product after pressing mold cooling, finished product needs health more than 7 days to balance internal moisture, release internal stress.Pressure does not reach plasticizing density lower than the product density that 8.0MPa then presses out, hypertonia then can densification too early, stop the discharge of moisture, make the later stage heat assimilation shaping time, in sheet material, local moisture cannot be discharged smoothly and glue together bad, cold pressing heat cure mainly for the production of shaped form moulded parts, and upper skill of colding pressing goes out that the efficiency of curvilinear component is high and form trait rate is better.
Advantage of the present invention: bamboo wood and fast growing wood roll when fresh state and make pencil unit, maintain the unimpeded of pit passage, spontaneous mycotic culture is adopted to improve the permeability of bamboo bundle and wood bundle, improve resin penetrating power, the plasticizing recombinant material density made is large, intensity is high, good toughness, good stability of the dimension, strength ratio common wood be high; There is better high/low temperature intensity and resistance to elevated temperatures, the reliability that tool is higher in-130 DEG C of-130 DEG C of temperature ranges; Can be used for the outdoor use deck of building structure, automobile die, train backing plate, bearing material etc.
Detailed description of the invention
Embodiment 1:
Adopt the method for spontaneous mould process bamboo wood and fast growing wood manufacture plasticizing recombinant material, comprise following processing step:
1) adopt fresh mao bamboon radial thin bamboo strip to roll well-thought-out plan bundle, width is wall thickness, and length is 50-220cm, and thickness is the thin rectangular bamboo bundle of 0.35-2.00mm; The poplar wood bundle of equal-specification is rolled out, as the Component units of plasticizing recombinant material with fresh Poplar sawn timber leftover pieces or brush wood;
2) above-mentioned bamboo and wood bundle carries out mould and naturally cultivates in culturing room, humidity 90 ± 5%, temperature 25-35 DEG C, and surface mould occurs within latter 2 days, stopping cultivating, and takes out;
3) the bamboo bundle after going mouldy and wood are restrainted into 0.75% sodium acid carbonate washing, after process, be dried to moisture content 12-14%; Dried wood bundle, adopt the pf resin of low molecular weight impregnation of solid content 33%, pH value 7-8.7, host molecule amount 500-850, bamboo Shu Caiyong molecular weight 1500-2000, solid content is the phenolic resins impregnation of 45-60%, drains after impregnation, glue rate of body weight gain 20%;
4) the bamboo bundle after impregnation and wood bundle are dried to moisture content 6-14%, the moisture content 10-14% of skin-material, core material 6-10% under 50-80 DEG C of condition; After dry, bamboo wood is restrainted according to weight ratio 2: 1 three layers of parallel orientation or evenly mixes assembly, pressing board length direction orienting spreading;
5) by above-mentioned shaping slab of mating formation at 140-150 DEG C, pressure 8.0-10MPa, the time: 1.2-1.8min/mm is hot pressed into plate, step-down cooling after ejecting plate, the plasticizing recombinant material temperature tolerance that hot pressing is produced is good, and thermal creep is less.
The physical and mechanical property of plate is as follows:
Size: 1220 × 2440 × 10-22mm
The averag density of plate: 1.2-1.35g/cm
3
MOR
//：≥100MPa
MOR
⊥：≥30MPa
MOE
//：≥11000MPa
MOE
⊥：≥3500MPa
Embodiment 2:
1) fresh cizu is that raw material makes bamboo bundle, and wooden bundle material is fast-growing masson pine;
2) bamboo Shu Zisheng mycotic culture is the same; Pinus massoniana bundle, adopts 1%NaOH degreasing, and bamboo bundle and wood bundle moisture content are about 15-18%;
3) 0.75% sodium acid carbonate washing is entered to the bamboo bundle after going mouldy and pinus massoniana bundle, after process, be dried to moisture content 12-14%; Dried wood bundle, adopt solid content 33%, pH value 7-8, host molecule amount is the pf resin of low molecular weight impregnation of 500-650, bamboo Shu Caiyong molecular weight 2000-2500, and solid content is the phenolic resins impregnation of 45-60%, drains after impregnation, glue rate of body weight gain 20-25%; Bamboo bundle and wood bundle under 50-80 DEG C of condition, pneumatic conveying drying to moisture content 6-14%, the moisture content 10-14% of top layer bamboo bundle, sandwich layer pinus massoniana bundle moisture content 6-10%;
4) after impregnation drying, bamboo wood bundle is according to weight 1: 1 proportioning, and bamboo bundle is in upper layer, and pinus massoniana bundle is at sandwich layer pressing board length direction orienting spreading; Bamboo bundle and wood bundle are dried to 140-150 DEG C, when resin is uncured, sends into mould and cold pressing, pressure 8.0-10.0MPa, after fixing patrix, heating mould or feeding heating clamber curing molding, heating-up temperature 110-120 DEG C, time 5-10min/mm, after solidification cooling, removes mould and takes out goods; The efficiency of this technique extrusion curvilinear component is high and form trait rate is better.
Embodiment 3:
1) adopt the fresh tangential cizu thin bamboo strip to roll well-thought-out plan bundle, width 5-18mm, length is 50-220cm, and thickness is the thin rectangular bamboo bundle of 0.35-2.00mm, goes blue or green de-etiolation; The poplar wood bundle of equal-specification is rolled out, as the Component units of plasticizing recombinant material with fresh Poplar sawn timber leftover pieces or brush wood;
2) above-mentioned bamboo and wood bundle carries out mould and naturally cultivates in culturing room, humidity 90 ± 5%, temperature 25-35 DEG C, and surface mould occurs within latter 2 days, stopping cultivating, and takes out;
3) the bamboo bundle after going mouldy and wood are restrainted into 0.75% sodium acid carbonate washing, after process, be dried to moisture content 12-14%; Dried wood bundle, adopt the pf resin of low molecular weight impregnation of solid content 33%, pH value 7-8.7, host molecule amount 500-850, bamboo Shu Caiyong molecular weight 1500-2000, solid content is the phenolic resins impregnation of 45-60%, drains after impregnation, glue rate of body weight gain 20%;
4) the bamboo bundle after impregnation and wood bundle are dried to moisture content 6-14%, the moisture content 10-14% of skin-material, core material 6-10% at 50-80 DEG C of temperature; After dry, bamboo wood is restrainted according to weight ratio 2: 1 three layers of parallel orientation or evenly mixes assembly, pressing board length direction orienting spreading;
5) by above-mentioned shaping slab of mating formation at 140-150 DEG C, pressure 8.0-10MPa, the time: 1.2-1.8min/mm is hot pressed into plate, step-down cooling after ejecting plate, the plasticizing recombinant material temperature tolerance that hot pressing is produced is good, and thermal creep is less.
Embodiment 4:
1) adopt the fresh tangential cizu thin bamboo strip to roll well-thought-out plan bundle, width 5-18mm, length is 50-220cm, and thickness is the thin rectangular bamboo bundle of 0.35-2.00mm, goes blue or green de-etiolation; The poplar wood bundle of equal-specification is rolled out, as the Component units of plasticizing recombinant material with fresh Poplar sawn timber leftover pieces or brush wood;
2) above-mentioned bamboo and wood bundle carries out mould and naturally cultivates in culturing room, humidity 90 ± 5%, temperature 25-35 DEG C, and surface mould occurs within latter 2 days, stopping cultivating, and takes out;
3) the bamboo bundle after going mouldy and wood are restrainted into 0.85% sodium acid carbonate washing, after process, be dried to moisture content 6-10%; Employing 0.5% reduction is black greatly or alkaline large black solution restraints dried wood or bamboo Shu Jinhang dyes, and dyeing is temperature 60-90 DEG C, time 6-12 hour, and rear taking-up of dyeing is dried to moisture content 6-14%; Adopt the pf resin of low molecular weight impregnation of solid content 33%, pH value 7-8.7, host molecule amount 500-850, bamboo Shu Caiyong molecular weight 2000-2500, solid content is the phenolic resins impregnation of 45-60%, drains after impregnation, glue rate of body weight gain 20%;
4) the bamboo bundle after impregnation and wood bundle are dried to moisture content 6-14%, the moisture content 10-14% of skin-material, core material 6-10% at 50-80 DEG C of temperature; After dry, bamboo wood bundle evenly mixes assembly according to weight ratio 1: 1, pressing board length direction orienting spreading;
5) by above-mentioned shaping slab of mating formation at 140-150 DEG C, pressure 8.0-10MPa, time: 1.2-1.8min/mm is hot pressed into plate, ejecting plate after step-down cooling, the cross lamination that the black Huang of plasticizing recombinant material tool produced of hot pressing is alternate, like tiger fur line or leopard line, outward appearance is beautiful.
Claims (7)
1. adopt the method for spontaneous mould process bamboo wood and fast growing wood manufacture plasticizing recombinant material, it is characterized in that comprising following processing step:
1) fresh bamboo wood and fast growing wood are rolled into bamboo bundle and wood bundle that thickness is less than 2mm, the moisture control of the bamboo bundle processed and wood bundle is more than 15%;
2) above-mentioned bamboo bundle, wood bundle carry out mould and naturally cultivate, humidity 90 ± 5%, temperature 25-35 DEG C in culturing room, and surface mould stops after occurring 2-3 days or bamboo bundle, wood are restrainted the maximum weight-loss ratio of over dry and stopped cultivation when 8-15%;
3) by the bamboo bundle after going mouldy and the washing of wooden Shu Jinhang 0.5-1% sodium acid carbonate, moisture content 12-14% is then dried to; Dried wood bundle, adopts solid content 33-70%, pH value 7-8.7, host molecule amount is the pf resin of low molecular weight impregnation of 500-850, impregnation after the phenolic resins of bamboo Shu Caiyong molecular weight 1500-2800, solid content 45-60% dilutes a times, drain after impregnation, glue weightening finish dose rate 18-35%; Moisture content 6-14% is dried to, as the moisture content 10-14% of the top layer bamboo wood beam material of article facing layer, for being core material 6-10% at 50-80 DEG C of temperature;
4) in bamboo bundle after impregnation drying, a certain proportion of layer of wooden Shu Jinhang or interlayer mixing group bad, pressing board length direction is directed or mat formation at random and be pressed into plate;
5) by above-mentioned shaping slab of mating formation at 140-150 DEG C, under pressure 8.0-20MPa, time 1.1-1.8min/mm parameter, hot pressing making sheet or employing heat cure of colding pressing is shaping.
2. according to the method adopting spontaneous mould process bamboo wood and fast growing wood manufacture plasticizing recombinant material in claim 1, it is characterized in that: step 1) described in bamboo bundle be through and be processed into thin microscler, laterally separately continuous bamboo bundle sheet or narrower single bamboo bundle, width should be more than 4 times of thickness, and thickness is less than 2mm; The tangential bamboo bundle made that rolls need go blue or green de-etiolation, and radial direction rolls the bamboo bundle made, and does not go blue or green de-etiolation.
3., according to the method adopting spontaneous mould process bamboo wood and fast growing wood manufacture plasticizing recombinant material in claim 1, it is characterized in that: step 2) described in, bamboo bundle and the spontaneous mycotic culture of wooden Shu Caiyong, the fast growing wood being easy to go mouldy selected by wooden bundle material; Rotproofness good fast-growing Chinese fir do not need mycotic culture, can be directly used in combination with the bamboo bundle after processing that go mouldy.
4. according to the method adopting spontaneous mould process bamboo wood and fast growing wood manufacture plasticizing recombinant material in claim 1, it is characterized in that: step 3) described in, go mouldy and process rear bamboo bundle and the cleaning of wooden Shu Caiyong 0.5-1% sodium bicarbonate aqueous solution, adjust according to fungus growth density or surperficial mould variability, stand density be greater than or mould variability higher than 50% need corresponding raising sodium bicarbonate aqueous solution concentration, otherwise then reduce sodium bicarbonate aqueous solution concentration or directly wash.
5. according to the method adopting spontaneous mould process bamboo wood and fast growing wood manufacture plasticizing recombinant material in claim 1, it is characterized in that: step 4) described in, bamboo bundle after washing and drying and wood bundle, dye or distinguish impregnation again after not dyeing, to increase the aesthetic property of material; By weight bamboo bundle during assembly: wood bundle=1: 4-4: 1, adopts bamboo bundle to be upper layer, three layers of oriented structure that wood bundle is sandwich layer or bamboo bundle and wood the bundle directly rear assembly of mixing become hybrid structure.
6., according to the method adopting spontaneous mould process bamboo wood and fast growing wood manufacture plasticizing recombinant material in claim 1, it is characterized in that: step 5) described in, hot pressing back segment takes out into plate after being down to 40 DEG C; To cold pressing solidification, the bamboo bundle after impregnation and wood bundle are dried to 150 DEG C, before resin solidification, proceed to cold press immediately, under 8.0-10.0MPa pressure, the pressurize of press-in mould, is fixedly heated to resin solidification, take out finished product after pressing mold cooling, finished product needs health more than 7 days.
7. according to the bamboo wood plasticizing recombinant material that any one in claim 1-6 adopts the method for spontaneous mould process bamboo wood and fast growing wood manufacture plasticizing recombinant material to produce, it is characterized in that: the bamboo bundle being less than 2mm with thickness is restrainted as Component units with wood, after spontaneous mould process, wood bundle dipping 500-850 pf resin of low molecular weight, the phenolic resin glue of bamboo bundle dipping 1500-2800 molecular weight, drying compacting of mating formation forms, its paving structure comprises following five types, 1) bamboo bundle is upper and lower surface layer, and wood bundle is three layers of parallel orientation structure of sandwich layer; 2) bamboo bundle is upper and lower surface layer, and sandwich layer is that three layers of bamboo wood bundle mixing orientation are parallel to structure; 3) wood bundle is upper and lower surface layer, and bamboo bundle is three layers of parallel orientation structure of sandwich layer; 4) wood is restrainted as upper and lower surface layer, and sandwich layer is that three layers of bamboo wood bundle mixing orientation are parallel to structure; 5) after bamboo bundle and wood bundle mix, parallel orientation or random paving structure.
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| CN104070571B (en) * | 2014-06-17 | 2016-04-06 | 福建农林大学 | A kind ofly utilize Aspergillus flavus to the method preventing bamboo wood from going mouldy |
| CN104015238B (en) * | 2014-06-23 | 2015-11-18 | 福建农林大学 | A kind of mildew-proof treatment method again contaminating mould bamboo chip |
| CN109304776B (en) * | 2018-08-03 | 2023-11-24 | 南京林业大学 | Manufacturing process and manufacturing equipment of round bamboo tenons for friction welding |
| CN111483033A (en) * | 2020-04-29 | 2020-08-04 | 广东省林业科学研究院 | Method for preparing recombined bamboo by adopting radial bamboo skin and recombined bamboo obtained by method |
| CN112659279B (en) * | 2020-12-04 | 2023-08-25 | 中国林业科学研究院木材工业研究所 | Wooden recombinant material and preparation method thereof |
| CN112895048B (en) * | 2021-01-18 | 2022-08-02 | 浙江农林大学 | Method for recycling mildewed dried bean curd stick wood |
| CN114536503B (en) * | 2022-02-28 | 2023-01-10 | 宜丰县永安建材有限责任公司 | Production method of heavy bamboo wide-breadth board |
| CN114714459B (en) * | 2022-04-07 | 2023-06-27 | 湖南桃花江竹材科技股份有限公司 | Outdoor high weather-resistant bamboo recombinant material and manufacturing method thereof |
| CN115091565B (en) * | 2022-07-15 | 2023-09-01 | 浙江农林大学 | Method for preparing large-piece shaving board by using mildewed and abandoned bamboo |
| CN115401758B (en) * | 2022-09-26 | 2023-07-25 | 江西米来竹业有限公司 | Dipping solution for outdoor heavy bamboo products and processing technology thereof |
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