CN102382481B - Green environment-friendly cushioning fiber package material and preparation method thereof - Google Patents
Green environment-friendly cushioning fiber package material and preparation method thereof Download PDFInfo
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- CN102382481B CN102382481B CN201110214458.3A CN201110214458A CN102382481B CN 102382481 B CN102382481 B CN 102382481B CN 201110214458 A CN201110214458 A CN 201110214458A CN 102382481 B CN102382481 B CN 102382481B
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Abstract
The invention discloses a green environment-friendly cushioning fiber package material and a preparation method thereof. The preparation method comprises the following steps: carrying out air flow drying on natural plant fibers until the water content in the fibers is 8-13%; then adding waterproofing agent, fire retardant and preservative which are used as chemical assistants; by using ethyl acetate as diluter, diluting MPU-20 urethane resin adhesive until a mixed liquid which is 3-5 times larger than the original volume is obtained; by using a spray gun as an air flow generator, sucking the mixed liquid of the chemical modification solution and the foamable MPU-20 urethane resin dispersion liquid into the air flow based on the negative pressure effect of the high-speed air flow generated when the spray gun is started, thus forming an air/liquid two-phase mixture fluid and mixing the air flow and the plant fibers; and molding to obtain the ultra-low-density (>=50kg/m<3>) package material. The material has cushioning performance superior to corrugated paper boards and honeycomb paper boards. Besides, the material has the advantages of easy mechanical processing, good bacterium resistance, low cost, good dimensional stability, high moisture resistance and the like.
Description
Technical field
The fibre packing material the present invention relates to, particularly relates to a kind of environmental protection cushioning fiber package material and preparation method thereof, and this material can be used for packaging industry electronic product and does amortizing packaging material use.
Background technology
Plastics macromolecular compound is generally by low molecular compounds such as ethene, by processing, to be reacted the products such as high polymer that form, polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC) and polystyrene (EPS/XPS) are as the most common plastics, because of the advantage such as it is easy to process, production cost is low and physicals is good, be deeply subject to consumers in general's favor.Plastic applications is very extensive, as amortizing packaging material of the mess-tin as food, packing bag and Industrial products etc., for another example in building field as plastic building materials'uses such as lagging material, finishing material etc.Yet, in manufacture and use procedure, there is many problems in these plastic materials, as being difficult to, under biodegradable and high temperature, can separate out bisphenols toxic substance etc. environment is existed to serious harm, caused serious environmental pollution, to human physical and mental health, produce significant threat, this pollution form is often referred to as " white pollution " by people, become one of pollution hazard that current social is the most serious.For this reason, world many countries or has just been taked production and the use of forcing legislative means to forbid expanded plastic." white pollution problems " that faces current existence, people have adopted many technical measures, as burn reclaimed heat energy, landfill, chemical recovery and waste plastic regeneration etc., solving or alleviating the impact that it produces environment.But still there is complex process in these processing modes, cost price is high and can not fundamentally solve the problems such as environmental pollution that plastic refuse brings.
At present research environment degredation plastic can be divided into following 3 kinds [Huang Farong. the research of Environmental lysis film, material Leader, 2007,14 (7): 40-44]: (1) photodegradable plastics, the polymkeric substance mainly being formed by unsaturated hydrocarbons and CO copolymerization or the polymkeric substance of manufacturing by adding transistion metal compound and photosensitizers and multi-aromatic compound; (2) biological damage plastics, the plastic prod of mainly manufacturing by add the methods such as starch or biodegradation agent in plastics; (3) there is the expanded plastic of complete biodegradable function, as PHA (PHAs) class plastics, poly(lactic acid) (PLA) class plastics, poly-epsilon-caprolactone (PCL) class plastics, diprotic acid dibasic alcohol ester plastic, starch (Starch) class plastics and vinyl alcohol plastics etc.In above-mentioned Environmental lysis film, there is the expanded plastic development of complete biodegradable rapidly.
Chinese scholars mainly adopts the method (Xie Yongqun of wet method foaming at present, Chen Yan, Zhang Biguang. the research of Foamed Material from Plant Fibers [J]. timber industry, 2004,18 (2): 30-32.) vegetable fibre stirred in water mixed state and cause brooming, add tackiness agent to make fibre orientation, combination, add again tensio-active agent and tackiness agent under agitation condition, thereby form a lot of little steam chests, reach the object that volume increases, the many little steam chest of formation makes material have certain buffering and mechanical property.In addition, Chinese scholar also with 4 kinds of paper pulp as bagasse chemical pulp, Mechanical pulp of Chinese fir, Pinus massoniana Lamb explosion pulp and newsprinting paper paper waste be raw material (Chen Yan. texturized fiber amortizing packaging material processed research [P]. master thesis, 2004), adopt composite adhesive, foam agent, fiber extension agent (poly-acetic acid emulsion glue) and pearl filler carry out expanded molding and have poroid foam material, think that fibre gap is constantly filled and rises in bubble growth process, add tensio-active agent to make bubble stabilizes, moisture when dry in slurry is evaporated gradually, fibre gap is less until connect, and think that the inner flyover framework proof of the texturized fiber forming bubble exists the tension force effect of fiber, these expanded wrapping material can natural degradation except what have a natural materials, can reuse, outside the features such as renewable and resource is extensive, the low density also with plastic foamed wrapping material, shock resistance, heat insulating, the features such as sound-absorbing is shockproof.
But, take degradable plant fibre as raw material, manufacturing paper mould, in plant fiber cushion packaging material process, also exist some problems as follows: (1) is in paper pulp molding forming, the lower concentration old paper stock suspension of mainly take is research object, by the method for the suction orifice vacuum take-off moulding in mould, carry out just one-step forming, then in mold heat, carry out thermocompression forming, the main product of producing low thickness, this forming method shortcoming is that water consumption is large, complex process, seriously polluted, and the low-grade wrapped product of many productions, if produce the product of high whiteness, also need to continue deinking processing, thereby cost is very high, pollute even more serious, application packages electronic instrument also needs the layered product that improves its properties or production structure complexity to improve its performance, therefore develop wastepaper pulping and papermaking slurry layered product and also have suitable potentiality.(2) plant fiber foam material is mainly to take vegetable fibre, starch to bake and bank up with earth or foam shaping by extrusion as main raw, and mainly with chemical foam blowing agent moulding, environment is had to certain negative impact.In addition; the hydroxyl that starch molecule contains countless meters; although a lot of investigators adopts esterification or acetylizad method modified hydroxyl to improve its water resisting property at present; if but it is also very difficult really to realize water resisting property; and starch foaming material is because popularity, the cost of raw material sources is higher and fragility has also limited greatly the widespread use of this kind of wrapping material, this mentions some data are existing.
Summary of the invention
The main purpose of patent of the present invention is to overcome the shortcoming at present domestic and international amortizing packaging material, and a kind of extremely-low density natural fiber amortizing packaging material of environmental protection is provided.
Another object of the present invention is to provide the preparation method of above-mentioned environmental protection natural fiber amortizing packaging material.
The present invention evenly mixes vegetable fibre and processes for some time with chemical assistant in high speed dispersion, make the hydroxy chemical group on vegetable fibre surface obtain modification, by some water-repellancy groups of grafting reaction, the ability that makes itself and water molecules form hydrogen bond declines greatly, thereby improves its water resistance; By some groups of oh group grafting on vegetable fibre surface, make vegetable fibre in combustion processes, produce the chemical substance of strong aerobic substance or generation fire extinguishing property, make it there is the ability burning away that stops; Add antibacterial auxiliary agent to reduce germ or the viability of mould under vegetable fibre environment simultaneously.After vegetable fibre is processed, it is evenly mixed with MUP-20 adhesive for polyurethane compound height, make by this method resin particle be uniformly distributed and vegetable fibre surface, to obtain good uniform property.By introducing a large amount of foaminess adhesive for polyurethane on vegetable fibre surface and producing foaming and crosslinking reaction impels material internal to be tending towards many microporous under water vapour left and right, make the filamentary material of preparation there is the ability of opposing foreign impacts power or absorb the extraneous energy applying, thereby give material good shock-absorbing capacity.According to target density and thickness, in the reaction zone of appropriate above-mentioned fiber/chemical assistant/sizing agent mixture injecting reactor, the jet hole by reactor lower part position after fixing sprays into high-temperature steam; In course of injection the active group of resin surface and fiber surface-group such as OH ,-COOH or phenolic hydroxyl group carries out cross-linking and curing reaction, and with steam (H
2o molecule) carry out foamable reaction, at material internal, form the micro hole structure of flood tide, impel material structure to be tending towards lightweight, many microporous.
Object of the present invention is achieved through the following technical solutions:
A preparation method for environmental protection Plantfiber buffering package material, comprises the steps and processing condition:
(1) fiber drying: be 8%～13% at air stream drying to fiber moisture by natural plant fibre;
(2) preparation of chemical modification solution: in mixing pit, add and account for the water-resisting agent, 8～15% fire retardant of over dry vegetable fibre weight 1～3% and 0.2～1.2% sanitas as chemical assistant, and add water dilution to be made into the chemical modification solution that chemical assistant solid content accounts for total solution weight 65～90%; Wherein water-resisting agent is SH-202R type copper silicon class water-resisting agent, and fire retardant is SUNFOR-RDP type oligomerization phosphoric fire retardant, and sanitas is TST25 type Kathon CG sanitas;
(3) preparation of foaminess MPU-20 urethane resin dispersion liquid: using ethyl acetate as thinner, to original volume 3-5 mixed solution doubly, gained mixed solution is uniformly mixed by MPU-20 urethane resin gluing dilution agent; The consumption of MPU-20 urethane tree be described mixed solution account for over dry natural plant fibre weight 10～30%;
(4) mix: after foaminess MPU-20 urethane resin dispersion liquid prepared by chemical modification solution prepared by step (2) and step (3) is uniformly mixed, put into the receiver of high-velocity jet rifle, the vegetable fibre of step (1) gained is put into high pressure resistant polyethylene plastic bag; Take spray gun as air-stream generating device, the high velocity air suction function producing while utilizing spray gun to start, mixed solution in described receiver is sucked to air-flow and forms gas/liquid biphasic mixture fluid, and air-flow mixes with vegetable fibre in high pressure resistant polyethylene plastic bag;
(5) moulding: first the up-hole plate of former is unloaded or opened, by step (4) gained mixture injecting material shaping district, under mixture, position uniform spreading is contained on lower injection orifice plate, from steam-in, pass into after the water vapor 20～30s of 400～700kPa pressure, stop passing into steam, after mixture being continued in shaping district to retain nearly 1～30min, take out, the material water ratio after taking out is dried and is reduced to 10～13%.
Further, described natural plant fibre is preferably one or more in needle pine lumber fibre, broad-leaved poplar lumber fibre and non-timber rice-straw fibre.
The described fiber moisture that is dried to is 8%～13%, by the air stream drying of 60 ℃～105 ℃.
It is on high speed digital display stirrer that the mixed solution of described step (3) is uniformly mixed, and at rotating speed, is to be uniformly mixed 1～3min under 1000～2000r/min condition.
Being uniformly mixed in described step (4) is on high speed digital display stirrer, to carry out 1000～2000r/min to be uniformly mixed 1～3min.
Former in described step (4), comprises up-hole plate, lagging material, lower injection orifice plate, high temperature pressure steam-in and forming cavity; Forming cavity upper end is provided with up-hole plate, and lower end is provided with lower injection orifice plate, and lower injection orifice plate is provided with a plurality of high temperature pressures steam-in, and forming cavity periphery is provided with lagging material.
Another object of the present invention is to provide a kind of environmental protection Plantfiber buffering package material, by above-mentioned, states any preparation in method.The network structure of described environmental protection Plantfiber buffering package material for being formed by vegetable fibre, the density≤100kg/m of this material
3, thickness>=30mm, water-intake rate≤0.5%; Fire-retardant rank is V-1 standard, indoor placement 12 months without mildew phenomena; The minimum dynamic buffering of material coefficient>=6.0, static buffering coefficient>=4.0, in static buffering process, there is yield phenomenon 2 times in material.
This invention product is compared with the amortizing packaging material of prior art, and tool has the following advantages:
1. can manufacture extremely-low density porous natural fiber amortizing packaging material, its density <=100kg/m
3, thickness can be at>=20mm, and porosity is more than 99%.
2. preparation cycle is extremely short, is about 1.5min, is the 1/25-1/100 of traditional heated-die pressing process production cycle, 1/3 of steam injection pressing method, and the expanded plastic times such as polystyrene are suitable with producing.
3. take cleaning water steam molecule as whipping agent and machining medium, the foamed gas producing is also colourless nontoxic, whole production process can not produce noise, the atmosphere and water pollution that surrounding enviroment are exerted an influence, and this is that the technology of preparing of other corrugated board cases, honeycomb cardboard, EPS expanded plastic and paper pulp moulding product is incomparable.
4. under identical dependent variable condition, the corresponding static stress size order of material is: agricultural wastes plant fiber mat < fiber molding < honeycomb cardboard < eps foam plastics, also show that molding can just can produce good shock absorption under very low static pressure effect, and honeycomb cardboard and eps foam plastics only can be brought into play good shock absorption under very high static stress condition.
5. compare with other amortizing packaging materials, this new green environment protection cushioning material there will be surrender effect 2 times in static buffering process, thereby it improves the buffering efficiency to package greatly, and can under higher stress requires, produce buffering effect.
6. compare with corrugated cardboard; this new green environment protection cushioning material has lower maximum acceleration value; and the maximum acceleration value of corrugated cardboard is very high; and this New Buffering material can obtain minimum maximum acceleration value under higher impact static stress condition, and corrugated cardboard need could obtain minimum maximum acceleration value under very low impact static stress.
7. compare with honeycomb cardboard, this New Buffering material has suitable minimum maximum acceleration value, but this New Buffering material has better shock-absorbing capacity, its reason is that this New Buffering material can obtain minimum maximum acceleration value under higher impact static stress condition, and honeycomb cardboard can only be obtained minimum maximum acceleration value relatively low in the situation that.
8. compare with eps foam plastics, this New Buffering material but has poor shock-absorbing capacity, its reason is that the minimum maximum acceleration value of urethane foam is lower than this New Buffering material, forms this New Buffering material and also can under higher impact static stress condition, obtain lower impact static stress.
9. honeycomb cardboard is the material that a kind of rigidity is larger, expensive, Restoration extreme difference, once just cannot be reused by conquassation, its production technique and product configurations are very complicated, and moulded paper pulp product is because it is too fine and close, bearing under larger static stress, high falling height or repeatedly impact condition, antivibration impact resistance is just poor, so can only make small-sized packaging cushion.With honeycomb cardboard and paper mould, this New Buffering material but there will not be above problem.
Material there is good anti humility performance (being less than 8%) and under severe environment well dimensional stability (being less than 2%) in.Product machining property is good, can product be processed into by modes such as cut mechanically to the material of arbitrary shape.In the manufacturing and use procedure, without any toxic substance, discharging, is a kind of environmental protection novel product that liked by human consumer.
Accompanying drawing explanation
Fig. 1 is environmental protection fiber amortizing packaging material preparation facilities sketch of the present invention.
Fig. 2 be environmental protection fiber amortizing packaging material of the present invention (a) with honeycomb cardboard (b), foaming polyurethane plastic foams (c) and double-deck stacked AB type double-layer corrugated cardboard (d) dynamic buffering Performance Ratio.
Embodiment
In order more deeply to understand the present invention, below in conjunction with embodiment, the present invention is further illustrated, it should be noted that, the scope of protection of present invention is not limited to the scope of embodiment statement.
As shown in Figure 1, a kind of former of preparing the functional thermal insulation and sound-absorbing material of environmental protection, comprises up-hole plate 1, lagging material 2, lower injection orifice plate 3, high temperature pressure steam-in 4, forming cavity 5.Forming cavity 5 upper ends are provided with up-hole plate 1, and lower end is provided with lower injection orifice plate 3, and lower injection orifice plate 3 is provided with a plurality of high temperature pressures steam-in 4, and forming cavity 5 peripheries are provided with lagging material 2.By fiber after processing with chemical modification, with MPU-20 mixed with resin, mixed reactant is put into forming cavity 5, regulates up-hole plate 1 to reach predetermined density and the thickness of material.
A method of preparing environmental protection natural fiber amortizing packaging material, comprises the steps and processing condition:
(1) fiber drying: it is 12% that natural plant fibre is dried to fiber moisture 95 ℃ of condition downstream; Natural plant fibre is the needle lumber fibre that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the SH-202R type copper silicon class water-resisting agent, 11% fire retardant and 0.9% the sanitas that account for over dry vegetable fibre weight 2%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 80%; Wherein water-resisting agent is SH-202R type copper silicon class water-resisting agent (Zaoyang Sihai Chemical Co., Ltd.); fire retardant is SUNFOR-RDP oligomerization phosphoric fire retardant (Yantai rising star's chemical article company limited), and sanitas is TST25 Kathon CG sanitas (Guangzhou Tian Yuan Chemical Co., Ltd.).
(3) preparation of foaminess MPU-20 urethane resin dispersion liquid: using ethyl acetate as thinner, by MPU-20 urethane resin gluing dilution agent, to 3 times of original volumes, gained mixture rotating speed on high speed digital display stirrer is to be uniformly mixed 2min under 1500r/min condition; The consumption of MPU-20 urethane tree accounts for 15% of over dry natural plant fibre weight for its liquid weight.
(4) mix: the vegetable fibre of step (1) gained is put into the high pressure resistant polyethylene plastic bag of LDPE erect type (Jiangyin mayor Jing Xinda plastics film company limited), take high-velocity jet rifle as air-stream generating device; Foaminess MPU-20 urethane resin dispersion liquid prepared by chemical modification solution prepared by step (2) and step (3) carries out equally (1500r/min) at a high speed and is uniformly mixed 2min on high speed digital display stirrer, after mixing, put it into (PQ-2/PQ-2U-B in the receiver of high-velocity jet rifle, Maite Tool Mfg. Co., Ltd., Zhejiang), the high velocity air suction function producing while utilizing spray gun to start, mixed solution in receiver is sucked to air-flow and forms gas/liquid biphasic mixture fluid, and air-flow mixes with vegetable fibre in high pressure resistant polyethylene plastic bag;
(5) moulding: as shown in Figure 1, first former up-hole plate 1 is unloaded or opened, by the mixed fiber of step (4) and chemical assistant and sizing agent mixture injecting material shaping district 5, under mixture position as far as possible uniform spreading be contained on lower injection orifice plate 3, from steam-in 4, pass into after the water vapor 25s of 500kPa pressure, after stopping passing into steam, it is continued in shaping district after the nearly 15min of reservation, take out, lagging material 2 is for reducing the thermosteresis effect of steam, and filamentary material obtains moulding; After moulding, material water ratio is dried and is reduced to 12%.
The hole of the filamentary material obtaining is divided into ellipse, circle, Polygons, trilateral and irregularly shaped pore character, be mainly hole and fiber finer cell internal void between fibre/fibre, between fiber and fiber, connect into continuous spacial framework and as the effect of holding capacity in buffering course, filamentary material be subject to outer force compresses and in buffering course between fiber hole and fiber inner pore play the effect of buffering.The whole profile of material is Natural color and cell texture.
After testing, resulting materials density is 85kg/m
3, thickness is 50mm, the minimum dynamic buffering coefficient of material is 5.8, water-intake rate≤0.5%, fire-retardant rank is V-1 standard (UL94 standard), indoor placement 12 months without mildew phenomena; Static buffering coefficient can be low to moderate 4.55, and in static buffering process, there will be yield phenomenon 2 times, anti humility performance 5.6%, and pucker & bloat coefficient is 1.3%.
This material has than agricultural wastes plant fiber mat, double-deck stacked AB type double-layer corrugated cardboard and the better shock-absorbing capacity of honeycomb cardboard, and the plastic prods such as Lve Xun and eps foam plastics and urethane foam.Fig. 2 be environmental protection fiber amortizing packaging material of the present invention (a) with honeycomb cardboard (b), foaming polyurethane plastic foams (c) and double-deck stacked AB type double-layer corrugated cardboard (d) dynamic buffering Performance Ratio.As shown in Figure 2, compare with the stacked AB type of bilayer double-layer corrugated cardboard, this molding has very good dynamic buffering performance.Molding has very low maximum acceleration value, and the maximum acceleration value of double-deck stacked AB type double-layer corrugated cardboard is very high, be that this molding can obtain minimum maximum acceleration value under higher impact static stress condition again, double-deck stacked AB type double-layer corrugated cardboard need could obtain minimum maximum acceleration value under very low impact static stress.Compare with honeycomb cardboard, molding has suitable minimum maximum acceleration value, but molding has better shock-absorbing capacity, its reason is that molding can obtain minimum maximum acceleration value under higher impact static stress condition, and honeycomb cardboard can only be obtained minimum maximum acceleration value relatively low in the situation that.And compare with urethane foam, molding but has poor shock-absorbing capacity, its reason is that the minimum maximum acceleration value of urethane foam is lower than molding, and molding also can obtain lower impact static stress under higher impact static stress condition.
Compare to the amortizing packaging material that above-mentioned relevant environment-friendly type is general, the present embodiment product also has with short production cycle, equips simple feature, the nearly 1.5min of production cycle of material sample as above-mentioned in preparation density.Honeycomb cardboard is the material that a kind of rigidity is larger, expensive, Restoration extreme difference, once just cannot be reused by conquassation, its production technique and product configurations are very complicated, and moulded paper pulp product is because it is too fine and close, bearing under larger static stress, high falling height or repeatedly impact condition, antivibration impact resistance is just poor, so can only make small-sized packaging cushion.Although and use at present frequently the porous plastics such as EPS to there is good shock-absorbing capacity, its manufacture and use procedure in cause very serious problem of environmental pollution, as " white pollution ".Therefore the extremely-low density fiber molding of developing this Green environmental protection has very important realistic meaning and far-reaching significance, vegetable fibre can almost kill many objectionable impuritiess such as mould after high-temperature steam is processed, this point is imported and exported highly beneficial for packing, can be for packing the middle-size and small-size products such as electronics.
A method of preparing environmental protection natural fiber amortizing packaging material, comprises the steps and processing condition:
(1) fiber drying: it is 13% that natural plant fibre is dried to fiber moisture 105 ℃ of condition downstream; Described natural plant fibre is the needle pine lumber fibre that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the water-resisting agent, 15% fire retardant and 1.2% the sanitas that account for over dry vegetable fibre weight 3%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 90%; Wherein water-resisting agent is SH-202R type copper silicon class water-resisting agent (Zaoyang Sihai Chemical Co., Ltd.); fire retardant is SUNFOR-RDP oligomerization phosphoric fire retardant (Yantai rising star's chemical article company limited), and sanitas is TST25 Kathon CG sanitas (Guangzhou Tian Yuan Chemical Co., Ltd.).
(3) preparation of foaminess MPU-20 urethane resin dispersion liquid: using ethyl acetate as thinner, by MPU-20 urethane resin gluing dilution agent, to 3 times of original volumes, gained mixture rotating speed on high speed digital display stirrer is to be uniformly mixed 3min under 2000r/min condition; The consumption of MPU-20 urethane tree accounts for 30% of over dry natural plant fibre weight for its liquid weight.
(4) mix: the vegetable fibre of step (1) gained is put into the high pressure resistant polyethylene plastic bag of LDPE erect type (Jiangyin mayor Jing Xinda plastics film company limited), take high-velocity jet rifle as air-stream generating device; Foaminess MPU-20 urethane resin dispersion liquid prepared by chemical modification solution prepared by step (2) and step (3) carries out equally (2000r/min) at a high speed and is uniformly mixed 3min on high speed digital display stirrer, after mixing, put it into (PQ-2/PQ-2U-B in the receiver of high-velocity jet rifle, Maite Tool Mfg. Co., Ltd., Zhejiang), the high velocity air suction function producing while utilizing spray gun to start, mixed solution in receiver is sucked to air-flow and forms gas/liquid biphasic mixture fluid, and air-flow mixes with vegetable fibre in high pressure resistant polyethylene plastic bag;
(5) moulding: as shown in Figure 1, first up-hole plate 1 is unloaded or opened, by the mixed fiber of step (4) and chemical assistant and sizing agent mixture injecting material shaping district 5, under mixture position as far as possible uniform spreading be contained on lower injection orifice plate 3, from steam-in 4, pass into after the water vapor 30s of 700kPa pressure, after stopping passing into steam, it is continued in shaping district after the nearly 30min of reservation, take out, lagging material 2 is for reducing the thermosteresis effect of steam, and filamentary material obtains moulding; After moulding, material water ratio is dried and is reduced to 13%.
After testing, resulting materials density is 82kg/m
3, thickness is 50mm, the minimum dynamic buffering coefficient 4.8 of material, water-intake rate 0.5%, fire-retardant rank is V-1 standard (UL94 standard), indoor placement 12 months without mildew phenomena; Static buffering coefficient 5.23, and in static buffering process, there will be yield phenomenon, anti humility performance 5.1%, pucker & bloat coefficient 1.1% 2 times.
A method of preparing environmental protection natural fiber amortizing packaging material, comprises the steps and processing condition:
(1) fiber drying: it is 10% that natural plant fibre is dried to fiber moisture 70 ℃ of condition downstream; Described natural plant fibre is the broad-leaved poplar lumber fibre that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the water-resisting agent, 12% fire retardant and 0.8% the sanitas that account for over dry vegetable fibre weight 2%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 78%; Wherein water-resisting agent is SH-202R type copper silicon class water-resisting agent (Zaoyang Sihai Chemical Co., Ltd.); fire retardant is SUNFOR-RDP oligomerization phosphoric fire retardant (Yantai rising star's chemical article company limited), and sanitas is TST25 Kathon CG sanitas (Guangzhou Tian Yuan Chemical Co., Ltd.).
(3) preparation of foaminess MPU-20 urethane resin dispersion liquid: using ethyl acetate as thinner, by MPU-20 urethane resin gluing dilution agent, to 3 times of original volumes, gained mixture rotating speed on high speed digital display stirrer is to be uniformly mixed 2min under 1500r/min condition; The consumption of MPU-20 urethane tree accounts for 15% of over dry natural plant fibre weight for its liquid weight.
(4) mix: the vegetable fibre of step (1) gained is put into the high pressure resistant polyethylene plastic bag of LDPE erect type (Jiangyin mayor Jing Xinda plastics film company limited), take high-velocity jet rifle as air-stream generating device; Foaminess MPU-20 urethane resin dispersion liquid prepared by chemical modification solution prepared by step (2) and step (3) carries out equally (1500r/min) at a high speed and is uniformly mixed 2min on high speed digital display stirrer, after mixing, put it into (PQ-2/PQ-2U-B in the receiver of high-velocity jet rifle, Maite Tool Mfg. Co., Ltd., Zhejiang), the high velocity air suction function producing while utilizing spray gun to start, mixed solution in receiver is sucked to air-flow and forms gas/liquid biphasic mixture fluid, and air-flow mixes with vegetable fibre in high pressure resistant polyethylene plastic bag;
(5) moulding: as shown in Figure 1, first up-hole plate 1 is unloaded or opened, by the mixed fiber of step (4) and chemical assistant and sizing agent mixture injecting material shaping district 5, under mixture position as far as possible uniform spreading be contained on lower injection orifice plate 3, from steam-in 4, pass into after the water vapor 25s of 500kPa pressure, after stopping passing into steam, it is continued in shaping district after the nearly 25min of reservation, take out, lagging material 2 is for reducing the thermosteresis effect of steam, and filamentary material obtains moulding; After moulding, material water ratio is dried and is reduced to 12%.
After testing, resulting materials density is 83kg/m
3, thickness is 50mm, the minimum dynamic buffering coefficient 5.7 of material, water-intake rate 0.6%, fire-retardant rank is V-1 standard (UL94 standard), indoor placement 12 months without mildew phenomena; Static buffering coefficient 5.87, and in static buffering process, there will be yield phenomenon, anti humility performance 5.4%, pucker & bloat coefficient 1.1% 2 times.
A method of preparing environmental protection natural fiber amortizing packaging material, comprises the steps and processing condition:
(1) fiber drying: it is 12% that natural plant fibre is dried to fiber moisture 99 ℃ of condition downstream; Described natural plant fibre is the non-timber rice-straw fibre that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the water-resisting agent, 14% fire retardant and 1.1% the sanitas that account for over dry vegetable fibre weight 2.5%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 88%; Wherein water-resisting agent is SH-202R type copper silicon class water-resisting agent (Zaoyang Sihai Chemical Co., Ltd.); fire retardant is SUNFOR-RDP oligomerization phosphoric fire retardant (Yantai rising star's chemical article company limited), and sanitas is TST25 Kathon CG sanitas (Guangzhou Tian Yuan Chemical Co., Ltd.).
(3) preparation of foaminess MPU-20 urethane resin dispersion liquid: using ethyl acetate as thinner, by MPU-20 urethane resin gluing dilution agent, to 3 times of original volumes, gained mixture rotating speed on high speed digital display stirrer is to be uniformly mixed 2.5min under 1800r/min condition; The consumption of MPU-20 urethane tree accounts for 25% of over dry natural plant fibre weight for its liquid weight.
(4) mix: the vegetable fibre of step (1) gained is put into the high pressure resistant polyethylene plastic bag of LDPE erect type (Jiangyin mayor Jing Xinda plastics film company limited), take high-velocity jet rifle as air-stream generating device; Foaminess MPU-20 urethane resin dispersion liquid prepared by chemical modification solution prepared by step (2) and step (3) carries out equally (1800r/min) at a high speed and is uniformly mixed 2.5min on high speed digital display stirrer, after mixing, put it into (PQ-2/PQ-2U-B in the receiver of high-velocity jet rifle, Maite Tool Mfg. Co., Ltd., Zhejiang), the high velocity air suction function producing while utilizing spray gun to start, mixed solution in receiver is sucked to air-flow and forms gas/liquid biphasic mixture fluid, and air-flow mixes with vegetable fibre in high pressure resistant polyethylene plastic bag;
(5) moulding: as shown in Figure 1, first up-hole plate 1 is unloaded or opened, by the mixed fiber of step (4) and chemical assistant and sizing agent mixture injecting material shaping district 5, under mixture position as far as possible uniform spreading be contained on lower injection orifice plate 3, from steam-in 4, pass into after the water vapor 20s of 600kPa pressure, after stopping passing into steam, it is continued in shaping district after the nearly 30min of reservation, take out, lagging material 2 is for reducing the thermosteresis effect of steam, and filamentary material obtains moulding; After moulding, material water ratio is dried and is reduced to 11%.
After testing, resulting materials density is 80kg/m
3, thickness is 50mm, the minimum dynamic buffering coefficient 5.6 of material, water-intake rate 0.4%, fire-retardant rank is V-1 standard (UL94 standard), indoor placement 12 months without mildew phenomena; Static buffering coefficient 5.7, and in static buffering process, there will be yield phenomenon, anti humility performance 4.77%, pucker & bloat coefficient 0.8% 2 times.
A method of preparing environmental protection natural fiber amortizing packaging material, comprises the steps and processing condition:
(1) fiber drying: it is 8% that natural plant fibre is dried to fiber moisture 100 ℃ of condition downstream; Described natural plant fibre is needle pine lumber fibre, broad-leaved poplar lumber fibre and the non-timber rice-straw fibre (above-mentioned three kinds of fibre weight ratios are 1: 2: 1) that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the water-resisting agent, 8% fire retardant and 1.2% the sanitas that account for over dry vegetable fibre weight 3%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 65%; Wherein water-resisting agent is SH-202R type copper silicon class water-resisting agent (Zaoyang Sihai Chemical Co., Ltd.); fire retardant is SUNFOR-RDP oligomerization phosphoric fire retardant (Yantai rising star's chemical article company limited), and sanitas is TST25 Kathon CG sanitas (Guangzhou Tian Yuan Chemical Co., Ltd.).
(3) preparation of foaminess MPU-20 urethane resin dispersion liquid: using ethyl acetate as thinner, by MPU-20 urethane resin gluing dilution agent, to 3 times of original volumes, gained mixture rotating speed on high speed digital display stirrer is to be uniformly mixed 1min under 2000r/min condition; The consumption of MPU-20 urethane tree accounts for 30% of over dry natural plant fibre weight for its liquid weight.
(4) mix: the vegetable fibre of step (1) gained is put into the high pressure resistant polyethylene plastic bag of LDPE erect type (Jiangyin mayor Jing Xinda plastics film company limited), take high-velocity jet rifle as air-stream generating device; Foaminess MPU-20 urethane resin dispersion liquid prepared by chemical modification solution prepared by step (2) and step (3) carries out equally (1000r/min) at a high speed and is uniformly mixed 3min on high speed digital display stirrer, after mixing, put it into (PQ-2/PQ-2U-B in the receiver of high-velocity jet rifle, Maite Tool Mfg. Co., Ltd., Zhejiang), the high velocity air suction function producing while utilizing spray gun to start, mixed solution in receiver is sucked to air-flow and forms gas/liquid biphasic mixture fluid, and air-flow mixes with vegetable fibre in high pressure resistant polyethylene plastic bag;
(5) moulding: as shown in Figure 1, first up-hole plate 1 is unloaded or opened, by the mixed fiber of step (4) and chemical assistant and sizing agent mixture injecting material shaping district 5, under mixture position as far as possible uniform spreading be contained on lower injection orifice plate 3, from steam-in 4, pass into after the water vapor 30s of 400kPa pressure, after stopping passing into steam, it is continued in shaping district after the nearly 1min of reservation, take out, lagging material 2 is for reducing the thermosteresis effect of steam, and filamentary material obtains moulding; After moulding, material water ratio is dried and is reduced to 13%.
After testing, resulting materials density is 82kg/m
3, thickness is 51mm, the minimum dynamic buffering coefficient 5.3 of material, water-intake rate 0.6%, fire-retardant rank is V-1 standard (UL94 standard), indoor placement 12 months without mildew phenomena; Static buffering coefficient 6.21, and in static buffering process, there will be yield phenomenon, anti humility performance 5.1%, pucker & bloat coefficient 1.1% 2 times.
Embodiment 6
A method of preparing environmental protection natural fiber amortizing packaging material, comprises the steps and processing condition:
(1) fiber drying: it is 8%% that natural plant fibre is dried to fiber moisture 105 ℃ of condition downstream; Described natural plant fibre is the needle pine lumber fibre that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the water-resisting agent, 11% fire retardant and 1.1% the sanitas that account for over dry vegetable fibre weight 2%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 77%; Natural plant fibre is needle pine lumber fibre, broad-leaved poplar lumber fibre and the non-timber rice-straw fibre (above-mentioned three kinds of fibre weight ratios are 1: 2: 1) that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the water-resisting agent, 8% fire retardant and 1.2% the sanitas that account for over dry vegetable fibre weight 3%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 65%; Wherein water-resisting agent is SH-202R type copper silicon class water-resisting agent (Zaoyang Sihai Chemical Co., Ltd.); fire retardant is SUNFOR-RDP oligomerization phosphoric fire retardant (Yantai rising star's chemical article company limited), and sanitas is TST25 Kathon CG sanitas (Guangzhou Tian Yuan Chemical Co., Ltd.).
(3) preparation of foaminess MPU-20 urethane resin dispersion liquid: using ethyl acetate as thinner, by MPU-20 urethane resin gluing dilution agent, to 3 times of original volumes, gained mixture rotating speed on high speed digital display stirrer is to be uniformly mixed 2.2min under 1570r/min condition; The consumption of MPU-20 urethane tree accounts for 24% of over dry natural plant fibre weight for its liquid weight.
(4) mix: the vegetable fibre of step (1) gained is put into the high pressure resistant polyethylene plastic bag of LDPE erect type (Jiangyin mayor Jing Xinda plastics film company limited), take high-velocity jet rifle as air-stream generating device; Foaminess MPU-20 urethane resin dispersion liquid prepared by chemical modification solution prepared by step (2) and step (3) carries out equally (1720r/min) at a high speed and is uniformly mixed 2.5min on high speed digital display stirrer, after mixing, put it into (PQ-2/PQ-2U-B in the receiver of high-velocity jet rifle, Maite Tool Mfg. Co., Ltd., Zhejiang), the high velocity air suction function producing while utilizing spray gun to start, mixed solution in receiver is sucked to air-flow and forms gas/liquid biphasic mixture fluid, and air-flow mixes with vegetable fibre in high pressure resistant polyethylene plastic bag;
(5) moulding: as shown in Figure 1, first up-hole plate 1 is unloaded or opened, by the mixed fiber of step (4) and chemical assistant and sizing agent mixture injecting material shaping district 5, under mixture position as far as possible uniform spreading be contained on lower injection orifice plate 3, from steam-in 4, pass into after the water vapor 30s of 600kPa pressure, after stopping passing into steam, it is continued in shaping district after the nearly 5min of reservation, take out, lagging material 2 is for reducing the thermosteresis effect of steam, and filamentary material obtains moulding; After moulding, material water ratio is dried and is reduced to 11%.
After testing, resulting materials density is 81kg/m
3, thickness is 50mm, the minimum dynamic buffering coefficient 5.7 of material, water-intake rate 0.4%, fire-retardant rank is V-1 standard (UL94 standard), indoor placement 12 months without mildew phenomena; Static buffering coefficient 5.54, and in static buffering process, there will be yield phenomenon, anti humility performance 5.1%, pucker & bloat coefficient 1.0% 2 times.
Embodiment 7
A method of preparing environmental protection natural fiber amortizing packaging material, comprises the steps and processing condition:
(1) fiber drying: it is 8%% that natural plant fibre is dried to fiber moisture 105 ℃ of condition downstream; Described natural plant fibre is the broad-leaved poplar lumber fibre that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the water-resisting agent, 11% fire retardant and 0.7% the sanitas that account for over dry vegetable fibre weight 3%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 69%; Natural plant fibre is needle pine lumber fibre, broad-leaved poplar lumber fibre and the non-timber rice-straw fibre (above-mentioned three kinds of fibre weight ratios are 1: 2: 1) that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the water-resisting agent, 8% fire retardant and 1.2% the sanitas that account for over dry vegetable fibre weight 3%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 65%; Wherein water-resisting agent is SH-202R type copper silicon class water-resisting agent (Zaoyang Sihai Chemical Co., Ltd.); fire retardant is SUNFOR-RDP oligomerization phosphoric fire retardant (Yantai rising star's chemical article company limited), and sanitas is TST25 Kathon CG sanitas (Guangzhou Tian Yuan Chemical Co., Ltd.).
(3) preparation of foaminess MPU-20 urethane resin dispersion liquid: using ethyl acetate as thinner, by MPU-20 urethane resin gluing dilution agent, to 3 times of original volumes, gained mixture rotating speed on high speed digital display stirrer is to be uniformly mixed 2.2min under 1200r/min condition; The consumption of MPU-20 urethane tree accounts for 24% of over dry natural plant fibre weight for its liquid weight.
(4) mix: the vegetable fibre of step (1) gained is put into the high pressure resistant polyethylene plastic bag of LDPE erect type (Jiangyin mayor Jing Xinda plastics film company limited), take high-velocity jet rifle as air-stream generating device; Foaminess MPU-20 urethane resin dispersion liquid prepared by chemical modification solution prepared by step (2) and step (3) carries out equally (1400r/min) at a high speed and is uniformly mixed 1.5min on high speed digital display stirrer, after mixing, put it into (PQ-2/PQ-2U-B in the receiver of high-velocity jet rifle, Maite Tool Mfg. Co., Ltd., Zhejiang), the high velocity air suction function producing while utilizing spray gun to start, mixed solution in receiver is sucked to air-flow and forms gas/liquid biphasic mixture fluid, and air-flow mixes with vegetable fibre in high pressure resistant polyethylene plastic bag;
(5) moulding: as shown in Figure 1, first up-hole plate 1 is unloaded or opened, by the mixed fiber of step (4) and chemical assistant and sizing agent mixture injecting material shaping district 5, under mixture position as far as possible uniform spreading be contained on lower injection orifice plate 3, from steam-in 4, pass into after the water vapor 23s of 500kPa pressure, after stopping passing into steam, it is continued in shaping district after the nearly 17min of reservation, take out, lagging material 2 is for reducing the thermosteresis effect of steam, and filamentary material obtains moulding; After moulding, material water ratio is dried and is reduced to 12%.
After testing, resulting materials density is 80kg/m
3, thickness is 50mm, the minimum dynamic buffering coefficient 4.5 of material, water-intake rate 0.5%.Fire-retardant rank is V-1 standard (UL94 standard), indoor placement 12 months without mildew phenomena; Static buffering coefficient 5.54, and in static buffering process, there will be yield phenomenon, anti humility performance 4.7%, pucker & bloat coefficient 1.3% 2 times.
Embodiment 8
A method of preparing environmental protection natural fiber amortizing packaging material, comprises the steps and processing condition:
(1) fiber drying: it is 9% that natural plant fibre is dried to fiber moisture 80 ℃ of condition downstream; Described natural plant fibre is the needle pine lumber fibre that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the water-resisting agent, 15% fire retardant and 1.1% the sanitas that account for over dry vegetable fibre weight 2%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 88%; Natural plant fibre is needle pine lumber fibre, broad-leaved poplar lumber fibre and the non-timber rice-straw fibre (above-mentioned three kinds of fibre weight ratios are 1: 2: 1) that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the water-resisting agent, 8% fire retardant and 1.2% the sanitas that account for over dry vegetable fibre weight 3%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 65%; Wherein water-resisting agent is SH-202R type copper silicon class water-resisting agent (Zaoyang Sihai Chemical Co., Ltd.); fire retardant is SUNFOR-RDP oligomerization phosphoric fire retardant (Yantai rising star's chemical article company limited), and sanitas is TST25 Kathon CG sanitas (Guangzhou Tian Yuan Chemical Co., Ltd.).
(3) preparation of foaminess MPU-20 urethane resin dispersion liquid: using ethyl acetate as thinner, by MPU-20 urethane resin gluing dilution agent, to 3 times of original volumes, gained mixture rotating speed on high speed digital display stirrer is to be uniformly mixed 2.5min under 1710r/min condition; The consumption of MPU-20 urethane tree accounts for 25% of over dry natural plant fibre weight for its liquid weight.
(4) mix: the vegetable fibre of step (1) gained is put into the high pressure resistant polyethylene plastic bag of LDPE erect type (Jiangyin mayor Jing Xinda plastics film company limited), take high-velocity jet rifle as air-stream generating device; Foaminess MPU-20 urethane resin dispersion liquid prepared by chemical modification solution prepared by step (2) and step (3) carries out equally (1200r/min) at a high speed and is uniformly mixed 2.4min on high speed digital display stirrer, after mixing, put it into (PQ-2/PQ-2U-B in the receiver of high-velocity jet rifle, Maite Tool Mfg. Co., Ltd., Zhejiang), the high velocity air suction function producing while utilizing spray gun to start, mixed solution in receiver is sucked to air-flow and forms gas/liquid biphasic mixture fluid, and air-flow mixes with vegetable fibre in high pressure resistant polyethylene plastic bag;
(5) moulding: as shown in Figure 1, first up-hole plate 1 is unloaded or opened, by the mixed fiber of step (4) and chemical assistant and sizing agent mixture injecting material shaping district 5, under mixture position as far as possible uniform spreading be contained on lower injection orifice plate 3, from steam-in 4, pass into after the water vapor 22s of 550kPa pressure, after stopping passing into steam, it is continued in shaping district after the nearly 24min of reservation, take out, lagging material 2 is for reducing the thermosteresis effect of steam, and filamentary material obtains moulding; After moulding, material water ratio is dried and is reduced to 11%.
After testing, resulting materials density is 80kg/m
3, thickness is 50mm, the minimum dynamic buffering coefficient 3.4 of material, water-intake rate 0.8%, fire-retardant rank is V-1 standard (UL94 standard), indoor placement 12 months without mildew phenomena; Static buffering coefficient 6.45, and in static buffering process, there will be yield phenomenon, anti humility performance 5.2%, pucker & bloat coefficient 1.1% 2 times.
Embodiment 9
A method of preparing environmental protection natural fiber amortizing packaging material, comprises the steps and processing condition:
(1) fiber drying: it is 8% that natural plant fibre is dried to fiber moisture 105 ℃ of condition downstream; Described natural plant fibre is the non-timber rice-straw fibre that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the water-resisting agent, 11% fire retardant and 0.9% the sanitas that account for over dry vegetable fibre weight 3%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 87%; Natural plant fibre is needle pine lumber fibre, broad-leaved poplar lumber fibre and the non-timber rice-straw fibre (above-mentioned three kinds of fibre weight ratios are 1: 2: 1) that utilizes mill legal system standby; Wherein fiber size is: by fibre content≤10% of the 14 order numbers that sieve; By 14 orders but be retained in fibre content≤80% between 100 orders; By fibre content >=10% of 100 order numbers.
(2) preparation of chemical modification solution: in mixing pit groove, add the water-resisting agent, 8% fire retardant and 1.2% the sanitas that account for over dry vegetable fibre weight 3%, and add water, be made into the chemical modification solution that solid content accounts for total solution weight 65%; Wherein water-resisting agent is SH-202R type copper silicon class water-resisting agent (Zaoyang Sihai Chemical Co., Ltd.); fire retardant is SUNFOR-RDP oligomerization phosphoric fire retardant (Yantai rising star's chemical article company limited), and sanitas is TST25 Kathon CG sanitas (Guangzhou Tian Yuan Chemical Co., Ltd.).
(3) preparation of foaminess MPU-20 urethane resin dispersion liquid: using ethyl acetate as thinner, by MPU-20 urethane resin gluing dilution agent, to 3 times of original volumes, gained mixture rotating speed on high speed digital display stirrer is to be uniformly mixed 2.4min under 1650r/min condition; The consumption of MPU-20 urethane tree accounts for 27% of over dry natural plant fibre weight for its liquid weight.
(4) mix: the vegetable fibre of step (1) gained is put into the high pressure resistant polyethylene plastic bag of LDPE erect type (Jiangyin mayor Jing Xinda plastics film company limited), take high-velocity jet rifle as air-stream generating device; Foaminess MPU-20 urethane resin dispersion liquid prepared by chemical modification solution prepared by step (2) and step (3) carries out equally (1300r/min) at a high speed and is uniformly mixed 2.7min on high speed digital display stirrer, after mixing, put it into (PQ-2/PQ-2U-B in the receiver of high-velocity jet rifle, Maite Tool Mfg. Co., Ltd., Zhejiang), the high velocity air suction function producing while utilizing spray gun to start, mixed solution in receiver is sucked to air-flow and forms gas/liquid biphasic mixture fluid, and air-flow mixes with vegetable fibre in high pressure resistant polyethylene plastic bag;
(5) moulding: as shown in Figure 1, first up-hole plate 1 is unloaded or opened, by the mixed fiber of step (4) and chemical assistant and sizing agent mixture injecting material shaping district 5, under mixture position as far as possible uniform spreading be contained on lower injection orifice plate 3, from steam-in 4, pass into after the water vapor 24s of 650kPa pressure, after stopping passing into steam, it is continued in shaping district after the nearly 22min of reservation, take out, lagging material 2 is for reducing the thermosteresis effect of steam, and filamentary material obtains moulding; After moulding, material water ratio is dried and is reduced to 12%.
After testing, resulting materials density is 80kg/m
3, thickness is 50mm, the minimum dynamic buffering coefficient 5.1 of material, water-intake rate 0.3%, fire-retardant rank is V-1 standard (UL94 standard), indoor placement 12 months without mildew phenomena; Static buffering coefficient 6.21, and in static buffering process, there will be yield phenomenon, anti humility performance 3.4%, pucker & bloat coefficient 1.3% 2 times.
Claims (7)
1. a preparation method for environmental protection Plantfiber buffering package material, is characterized in that comprising the steps and processing condition:
(1) fiber drying: be 8%～13% at air stream drying to fiber moisture by natural plant fibre;
(2) preparation of chemical modification solution: in mixing pit, add and account for the water-resisting agent, 8～15% fire retardant of over dry vegetable fibre weight 1～3% and 0.2～1.2% sanitas as chemical assistant, and add water dilution to be made into the chemical modification solution that chemical assistant solid content accounts for total solution weight 65～90%; Wherein water-resisting agent is SH-202R type copper silicon class water-resisting agent, and fire retardant is SUNFOR-RDP type oligomerization phosphoric fire retardant, and sanitas is TST25 type Kathon CG sanitas;
(3) preparation of foaminess MPU-20 urethane resin dispersion liquid: using ethyl acetate as thinner, to original volume 3-5 mixed solution doubly, gained mixed solution is uniformly mixed by MPU-20 urethane resin gluing dilution agent; The consumption of MPU-20 urethane resin be described mixed solution account for over dry natural plant fibre weight 10～30%;
(4) mix: after foaminess MPU-20 urethane resin dispersion liquid prepared by chemical modification solution prepared by step (2) and step (3) is uniformly mixed, put into the receiver of high-velocity jet rifle, the vegetable fibre of step (1) gained is put into high pressure resistant polyethylene plastic bag; Take spray gun as air-stream generating device, the high velocity air suction function producing while utilizing spray gun to start, mixed solution in described receiver is sucked to air-flow and forms gas/liquid biphasic mixture fluid, and air-flow mixes with vegetable fibre in high pressure resistant polyethylene plastic bag;
(5) moulding: first the up-hole plate of former is unloaded or opened, by step (4) gained mixture injecting material shaping district, under mixture, position uniform spreading is contained on lower injection orifice plate, from steam-in, pass into after the water vapor 20～30s of 400～700kPa pressure, stop passing into steam, after mixture being continued in shaping district to retain 1～30min, take out, the material water ratio after taking out is dried and is reduced to 10～13%.
2. the preparation method of environmental protection Plantfiber buffering package material according to claim 1, is characterized in that: described natural plant fibre is one or more in needle pine lumber fibre, broad-leaved poplar lumber fibre and non-timber rice-straw fibre.
3. the preparation method of environmental protection Plantfiber buffering package material according to claim 1, is characterized in that: described in to be dried to fiber moisture be 8%～13%, by the air stream drying of 60 ℃～105 ℃.
4. the preparation method of environmental protection Plantfiber buffering package material according to claim 1, it is characterized in that: it is on high speed digital display stirrer that the mixed solution of described step (3) is uniformly mixed, and at rotating speed, is to be uniformly mixed 1～3min under 1000～2000r/min condition.
5. the preparation method of environmental protection Plantfiber buffering package material according to claim 1, is characterized in that: being uniformly mixed in described step (4) is on high speed digital display stirrer, to carry out 1000～2000r/min to be uniformly mixed 1～3min.
6. the preparation method of environmental protection Plantfiber buffering package material according to claim 1, is characterized in that: the former in described step (4), comprises up-hole plate, lagging material, lower injection orifice plate, high temperature pressure steam-in and forming cavity; Forming cavity upper end is provided with up-hole plate, and lower end is provided with lower injection orifice plate, and lower injection orifice plate is provided with a plurality of high temperature pressures steam-in, and forming cavity periphery is provided with lagging material.
7. an environmental protection Plantfiber buffering package material, is characterized in that: in method described in claim 1-6 prepared by any one; The network structure of described environmental protection Plantfiber buffering package material for being formed by vegetable fibre, the density≤100kg/m of this material
3, thickness>=30mm, water-intake rate≤0.5%; Fire-retardant rank is V-1 standard, indoor placement 12 months without mildew phenomena; The minimum dynamic buffering of material coefficient>=6.0, static buffering coefficient>=4.0, in static buffering process, there is yield phenomenon 2 times in material.
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| CN103103893B (en) * | 2012-12-27 | 2015-06-03 | 韶能集团广东绿洲纸模包装制品有限公司 | Method for reducing food packaging paper pulp molded product fiber dosage |
| CN105968669A (en) * | 2016-05-19 | 2016-09-28 | 苏州倍力特物流设备有限公司 | Silicon-carbide-fiber-reinforced composite packaging material and preparation method thereof |
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| CN111421852B (en) * | 2020-04-01 | 2021-11-16 | 国际竹藤中心 | Preparation method of multi-wall-layer weather-resistant plant fiber reinforced air pipe |
| USD1016497S1 (en) | 2020-07-29 | 2024-03-05 | 3M Innovative Properties Company | Expanded sheet |
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| 蒸汽喷射处理植物纤维成形体的降解液物理化学特性研究;刘德桃等;《林产化学与工业》;20081231;第28卷(第6期);61-66 * |
| 蒸汽喷射快速成形多孔纤维体结构研究;刘德桃等;《包装工程》;20071231;第28卷(第12期);8-10，13 * |
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