CN104179054B - By castor-oil plant limb, Chinese silvergrass stem stalk for the production of the method for medium density fibre board (MDF) - Google Patents
By castor-oil plant limb, Chinese silvergrass stem stalk for the production of the method for medium density fibre board (MDF) Download PDFInfo
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- CN104179054B CN104179054B CN201410392343.7A CN201410392343A CN104179054B CN 104179054 B CN104179054 B CN 104179054B CN 201410392343 A CN201410392343 A CN 201410392343A CN 104179054 B CN104179054 B CN 104179054B
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Abstract
By castor-oil plant limb, Chinese silvergrass stem stalk for the production of the method for fiberboard, comprise; 1. by chip after castor-oil plant limb, the mixing of Chinese silvergrass stem stalk; 2. by fragment humidification and preheating, fiber separation is carried out with defibrator; 3. the after-applied pollopas of fibers mixture, ammonium chloride curing agent and paraffin water repellent, mixing; 4. fiber mixture is dry; 5. dried fibres is sieved, become fiber hair plates through hot press hot pressing; 6. cutting edge after hair plates cooling, sanding obtain Midst density finished fiber plate.The fibreboard surface that the present invention obtains is smooth, and fibr tissue is even, medium density, good stability of the dimension, and machinability is good, and bonding strength, MOR, two-dimensional electrostatic fields are high, and modulus of elasticity is good, and supine human body is strong, low moisture absorption, low water suction.The inventive method utilizes castor-oil plant limb, Chinese silvergrass stem stalk producd fibers plate, realizes castor anesthesia stem and cuts down to upgrade year after year and contain fruit, stop Chinese silvergrass stem stalk and cause mountain fire.Be applicable to castor-oil plant and Chinese silvergrass growth area.
Description
Technical field
The present invention relates to glued board, in particular to the bonding fiber plate produced with castor-oil plant limb, Chinese silvergrass stem stalk.
Background technology
Well-known: castor-oil plant (Ricinuscommunis) belongs to Euphorbiaceae, 1 year or herbaceos perennial, plant shrub or arbor shape, generally high 1 ~ 4.5m.Castor-oil plant wide adaptability, easy to raise, barren-resistant, arid, saline and alkaline.Castor-oil plant is one of large oil crops in the world ten, and seed oil-containing is up to 46% ~ 56%, and castor oil is widely used in chemical industry, medicine etc.; Contain abundant fiber in castor anesthesia stem and cortex, can be used as the raw material of papermaking and artificial cotton.Chinese silvergrass (Miscanthus) is the general designation of various awns platymiscium, containing 15 to 20 species of having an appointment, belong to grass, be born in Subtropical low altitude area more, Chinese silvergrass stem stalk can be used for braiding Lu Mang straw mat, harvesting Chinese silvergrass inflorescence makees broom, leaf makes dyestuff etc., and the method for utilization is few.At present, castor-oil plant limb, Chinese silvergrass stem stalk are discarded usually or as plant slag, and these fibre resources do not fully utilize, and arid season has again the hidden danger causing mountain fire.
Through retrieval, the technology of other manufacture of materials fiberboard useful.But also do not utilize castor-oil plant limb, fiberboard patent application that Chinese silvergrass stem stalk is produced for raw material.
Summary of the invention
The object of this invention is to provide a kind of by castor-oil plant limb, Chinese silvergrass stem stalk for the production of the method for fiberboard, making castor-oil plant limb, Chinese silvergrass stem stalk resource be fully used, opening up new raw material approach for producing fiberboard.
For achieving the above object, the method that inventor provides comprises;
(1) castor-oil plant limb, Chinese silvergrass stem stalk are used drum chipper chip respectively, mix in the ratio of castor-oil plant limb fragment, Chinese silvergrass stem stalk fragment 45: 55, through screening machine screening, remove excessive fragment, bits end and other impurity;
(2) qualified castor-oil plant limb fragment, Chinese silvergrass stem stalk fragment compound are put into defibrator pre-cooked tank and passed into low-pressure steam humidification and preheating, then fragment sends into the vertical digester boiling of defibrator through feed auger, after fragment is softening, carry out fiber separation with defibrator grinding;
(3) fiber ground sends into fiber drying system by continuous pulp discharge valve, before drying duct sent into by fiber; Paraffin molten metering infusion is entered defibrator, pollopas, curing agent glue mixer is allocated in proportion, sprays into defibrator drainage conduit through metering device.
(4) drying system adopts high temperature gas flow dry, and wet fiber mix with thermal medium, and wet fiber is carried in drying duct, and the moisture of wet fiber is taken away by medium because of endothermic gasification, and dried fiber is delivered to the storage of dry fiber feed bin after cyclone separator separation.
(5) by the screen cloth sorting of dry fibers different for specification with different mesh, acceptable fiber Geldart-D particle is entered vacuum pneumatic to mat formation forming machine, mat formation into continuous slab blank strip, thick fiber lay down is contained in slab sandwich layer, and fiber fines is mated formation in steel slab surface, puts down slab with putting down rod, slab after shaping edging after precompressed, and the transversal one-tenth certain specification of the breadth pressing heating platen, enter hot pressing process, divide three sections of temperature hot pressing through hot press;
(6) the continuous hair plates suppressed enters cooling panel turnover device, after cooling after length sawing, jack saw cutting, carries out sanding after being transported to warehouse storage; Sanding line carries out sanding surface to hair plates and adjusts products thickness, and production board is packaging warehouse-in after inspection grades.
In (1) step of said method, the moisture content of described castor-oil plant limb, Chinese silvergrass stem stalk is 35% ~ 40%; The length of described fragment is 15 ~ 30mm.
In (2) step of said method, the low-pressure steam pressure of described humidification and preheating is 0.2 ~ 0.3MPa; Described digestion time is 3 ~ 5min, and steam pressure is at 0.6 ~ 0.8MPa, and temperature controls at 155 DEG C ~ 175 DEG C; Moisture content when described fragment softens is 35% ~ 50%; Described grinding pressure controls at 0.6 ~ 4.2MPa.
In (3) step of said method, described ratio is: the paraffin water repellent of fiber quality 1.5% ~ 2%, the pollopas of fiber quality 10% ~ 13%, the curing agent of fiber quality 1%.
In (4) step of said method, described high temperature gas flow drying is the baking temperature of control wet fiber is the inlet temperature of medium, and primary air stream import baking temperature is 130 DEG C ~ 170 DEG C, and outlet temperature is 60 DEG C ~ 70 DEG C; Described wet fiber and thermal medium mixed proportion are the dry fiber of every 1 ㎏: 15 ~ 30m
3air; The wet fiber floating velocity average out to 8.5m/s of described drying machine pipage control, air velocity is 22 ~ 30m/s, and the time of staying is 3.5 ~ 5s, and drought index is fiber moisture is 6% ~ 8%.
In (5) step of said method, the ratio that described screening requires is: more than 2mm is less than 20%, 0.12 ~ 2mm be greater than 70%, 0.125mm be less than 10%; The first paragraph temperature of described three sections of temperature hot pressing is 160 DEG C ~ 190 DEG C, second segment 180 DEG C ~ 220 DEG C, the 3rd section 150 DEG C ~ 160 DEG C, the initial plate core layer temperature of pressurize section is 100 DEG C, outlet temperature is 100 DEG C ~ 110 DEG C, and the hot pressing time of unit thickness of slab is 11 ~ 21s/ ㎜; Described hot press is multilayer large-format hot press, and medium is deep fat.
In (6) step of said method, the specification of described cutting is 1220mm × 2440mm; Described period of storage is 3 ~ 4 days.
The fiberboard that method of the present invention utilizes castor-oil plant limb, Chinese silvergrass stem stalk is produced for raw material, has following performance; Smooth surface, fibr tissue is even, medium density, good stability of the dimension, and machinability is good, and bonding strength, MOR, two-dimensional electrostatic fields are high, and modulus of elasticity is good, and supine human body is strong, low moisture absorption, low water suction.The present invention utilizes annual a large amount of discarded castor-oil plant limb, easily causes the raw material of Chinese silvergrass stem stalk as producd fibers plate of mountain fire; achieve (1) castor anesthesia stem to cut down to reach year after year and upgrade object, the stem stalk of containing fruit and sell as raw material; promote Increase Income of Peasant Households; (2) harvesting in autumn of Chinese silvergrass stem stalk stops to cause mountain fire with this; protecting ecology balances; increase peasant household's employment, there is raw material guarantee in (3) enterprise, obtains economic development.Be applicable to the utilization of resources in castor-oil plant and Chinese silvergrass growth area.
Detailed description of the invention
Embodiment
(1) first, moisture content is 35% ~ 40% castor-oil plant limb, Chinese silvergrass stem stalk is whittled into 15 ~ 30mm fragment with drum chipper respectively, mix in the ratio of castor-oil plant limb fragment, Chinese silvergrass stem stalk fragment 45: 55, through screening machine screening, remove excessive fragment, bits end and other impurity;
(2) after, qualified castor-oil plant limb fragment, Chinese silvergrass stem stalk fragment compound are put into defibrator pre-cooked tank and passed into low-pressure steam humidification and preheating, the saturated vapour pressure of preheating is 0.3MPa, then fragment sends into the vertical digester of defibrator through feed auger, with 170 DEG C of boilings, digestion time is 4min, and steam pressure is 0.7MPa,, moisture content softening until fragment is carry out fiber separation with defibrator grinding after 35% ~ 50%, and grinding pressure remains on 3.6 ~ 4.0MPa;
(3) fiber ground sends into fiber drying system by continuous pulp discharge valve, before drying duct sent into by fiber; Paraffin molten metering infusion is entered defibrator, by pollopas, curing agent, wait and allocate in proportion with glue mixer, allotment is than the paraffin water repellent for fiber quality 2%, the pollopas of fiber quality 12%, the curing agent of fiber quality 1%, spray into defibrator drainage conduit through metering device;
(4) adopt high temperature gas flow dry after, the baking temperature of wet fiber is the inlet temperature of medium, and primary air stream import baking temperature is 150 DEG C ~ 170 DEG C, and outlet temperature is 60 DEG C ~ 70 DEG C, wet fiber mixes with thermal medium, and wet fiber and thermal medium mixed proportion are the dry fiber of every 1 ㎏: 15 ~ 30m
3air, the wet fiber floating velocity average out to 8.5m/s of drying machine pipage control, air velocity is 22 ~ 30m/s, and the time of staying is 4 ~ 5s, drought index is fiber moisture is 6% ~ 8%, and dried fiber is delivered to dry fiber feed bin and stores after cyclone separator is separated;
(5) again, by the screen cloth sorting of dry fibers different for specification with different mesh, the ratio that screening requires is: more than 2mm is less than 20%, 0.12 ~ 2mm is greater than 70%, 0.125mm is less than 10%, enter vacuum pneumatic with pneumatic convey to mat formation forming machine, mat formation into continuous slab blank strip, thick fiber lay down is contained in slab sandwich layer, fiber fines is mated formation in steel slab surface, slab is put down with putting down rod, slab after shaping edging after precompressed, and the transversal one-tenth certain specification of the breadth pressing heating platen, enter hot pressing process, three sections of temperature hot pressing are divided: first paragraph temperature is 160 DEG C ~ 190 DEG C through hot press, second segment 180 DEG C ~ 220 DEG C, 3rd section 150 DEG C ~ 160 DEG C, the initial plate core layer temperature of pressurize section is 100 DEG C, outlet temperature is 100 DEG C ~ 110 DEG C, the hot pressing time of unit thickness of slab is 11 ~ 21s/ ㎜, hot press is multilayer large-format hot press, and medium is deep fat,
(6) last, the continuous hair plates suppressed enters cooling panel turnover device, after length sawing, jack saw cut into 1220 ㎜ × 2440 ㎜ specifications after cooling, is transported to warehouse and stores after 4 days and carry out sanding; Sanding line carries out sanding surface to hair plates and adjusts products thickness tolerance, and production board is packaging warehouse-in after inspection grades.
Claims (7)
1. by castor-oil plant limb, Chinese silvergrass stem stalk for the production of a method for fiberboard, it is characterized in that comprising;
(1) castor-oil plant limb, Chinese silvergrass stem stalk are used drum chipper chip respectively, mix in the ratio of castor-oil plant limb fragment, Chinese silvergrass stem stalk fragment 45: 55, through screening machine screening, remove excessive fragment, bits end;
(2) qualified castor-oil plant limb fragment, Chinese silvergrass stem stalk fragment compound are put into defibrator pre-cooked tank and passed into low-pressure steam humidification and preheating, then fragment sends into the vertical digester boiling of defibrator through feed auger, after fragment is softening, carry out fiber separation with defibrator grinding;
(3) fiber ground sends into fiber drying system by continuous pulp discharge valve, before drying duct sent into by fiber; Paraffin molten metering infusion is entered defibrator, pollopas, curing agent glue mixer is allocated in proportion, sprays into defibrator drainage conduit through metering device;
(4) drying system adopts high temperature gas flow dry, wet fiber mixes with thermal medium, wet fiber is carried in drying duct, and the moisture of wet fiber is taken away by medium because of endothermic gasification, and dried fiber is delivered to dry fiber feed bin and stores after cyclone separator is separated;
(5) by the screen cloth sorting of dry fibers different for specification with different mesh, acceptable fiber Geldart-D particle is entered vacuum pneumatic to mat formation forming machine, mat formation into continuous slab blank strip, thick fiber lay down is contained in slab sandwich layer, fiber fines is mated formation in steel slab surface, slab is put down with putting down rod, slab after shaping edging after precompressed, and the transversal one-tenth certain specification of the breadth pressing heating platen, enter hot pressing process, divide three sections of temperature hot pressing through hot press, obtain hair plates;
(6) the continuous hair plates suppressed enters cooling panel turnover device, after cooling after length sawing, jack saw cutting, carries out sanding after being transported to warehouse storage; Sanding line carries out sanding surface to hair plates and adjusts products thickness, and Midst density finished fiber plate is packaging warehouse-in after inspection grades.
2. the method for claim 1, is characterized in that in (1) step, and the moisture content of described castor-oil plant limb, Chinese silvergrass stem stalk is 35% ~ 40%; The length of described fragment is 15 ~ 30mm.
3. the method for claim 1, is characterized in that in (2) step, and the low-pressure steam pressure of described humidification and preheating is 0.2 ~ 0.3MPa; Described digestion time is 3 ~ 5min, and steam pressure is at 0.6 ~ 0.8MPa, and temperature controls at 155 DEG C ~ 175 DEG C; Moisture content when described fragment softens is 35% ~ 50%; Described grinding pressure controls at 0.6 ~ 4.2MPa.
4. the method for claim 1, is characterized in that in (3) step, described ratio is: the paraffin water repellent of fiber quality 1.5% ~ 2%, the pollopas of fiber quality 10% ~ 13%, the curing agent of fiber quality 1%.
5. the method for claim 1, it is characterized in that in (4) step, described high temperature gas flow drying is the baking temperature of control wet fiber is the inlet temperature of medium, and primary air stream import baking temperature is 130 DEG C ~ 170 DEG C, and outlet temperature is 60 DEG C ~ 70 DEG C; Described wet fiber and thermal medium mixed proportion are the dry fiber of every 1 ㎏: 15 ~ 30m
3air; The wet fiber floating velocity average out to 8.5m/s of described drying duct pipage control, air velocity is 22 ~ 30m/s, and the time of staying is 3.5 ~ 5s, and drought index is fiber moisture is 6% ~ 8%.
6. the method for claim 1, is characterized in that in (5) step, and the ratio that described screen cloth sorting requires is: the fiber of more than 2mm is less than 20%, and the fiber that the fiber of 0.12 ~ 2mm is greater than 70%, 0.125mm is less than 10%; The first paragraph temperature of described three sections of temperature hot pressing is 160 DEG C ~ 190 DEG C, second segment 180 DEG C ~ 220 DEG C, the 3rd section 150 DEG C ~ 160 DEG C, the initial plate core layer temperature of pressurize section is 100 DEG C, outlet temperature is 100 DEG C ~ 110 DEG C, and the hot pressing time of unit thickness of slab is 11 ~ 21s/ ㎜; Described hot press is multilayer large-format hot press, and medium is deep fat.
7. the method for claim 1, is characterized in that in (6) step, and the specification of described cutting is 1220mm × 2440mm; Described period of storage is 3 ~ 4 days.
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| CN201410392343.7A CN104179054B (en) | 2014-08-11 | 2014-08-11 | By castor-oil plant limb, Chinese silvergrass stem stalk for the production of the method for medium density fibre board (MDF) |
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| CN201410392343.7A CN104179054B (en) | 2014-08-11 | 2014-08-11 | By castor-oil plant limb, Chinese silvergrass stem stalk for the production of the method for medium density fibre board (MDF) |
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| CN105666632B (en) * | 2016-01-25 | 2018-01-19 | 新沂市大自然木业有限公司 | A kind of manufacture method of antitheft door door-plate environment friendly corrosion protection medium density fibre board (MDF) |
| CN105690538B (en) * | 2016-01-25 | 2018-01-19 | 新沂市大自然木业有限公司 | A kind of manufacture method of laminated flooring environmental protection flame retardant medium density fibre board (MDF) |
| CN106493823A (en) * | 2016-11-15 | 2017-03-15 | 苍南宇诺新材料科技有限公司 | Modern fibre plate processing method |
| CN109624015A (en) * | 2018-12-29 | 2019-04-16 | 上海昶法新材料有限公司 | A kind of environment-friendly type density board and preparation method thereof of papermaking waste production |
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| BRPI0610106A2 (en) * | 2005-05-02 | 2011-10-11 | Basf Ag | Process for the hydrophobization of lignocellulose materials, lignocellulose material, and aqueous composition |
| CN101337373B (en) * | 2008-01-11 | 2011-10-05 | 南京林业大学 | Preparation method of silver-grass fiber board of medium density |
| US8241419B2 (en) * | 2009-05-29 | 2012-08-14 | Weyerhaeuser Nr Company | Fiber cement board with modified fiber |
| CN101642925B (en) * | 2009-09-08 | 2012-05-30 | 苏州伍得人造板设备有限公司 | Urea formaldehyde resin adhesive medium density fiber board utilizing castor bean stalk as raw material |
| CN102650108B (en) * | 2012-04-19 | 2014-06-04 | 华中科技大学 | Method for producing fiberboards by lignocelluloses as raw materials |
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