Background of invention
For the forest spontaneous combustion resource that protection reduces day by day, utilize waste paper regenerated product recycled writing paper, be an inexorable trend of current paper industry.But in producing recycled writing paper and production paper process, produce a large amount of wastes, bring serious environmental problem.Along with the increasingly stringent of national environmental protection policy, the waste of rationally handling paper industry becomes the focus that people more and more pay close attention to.
The processing of waste water during waste paper reclaims, waste residue has been described in " pulping and paper-making power-saving technology " that China Light Industry Press publishes in November, 1999.What wherein address waste paper regenerated middle waste residue amount maximum is waste-paper mill sludge that flotation cell comes out, and one ton of recycled writing paper of every production produces about 150 kilograms paper mill sludge.Mainly printing-ink, carclazyte, filler, fiber fines etc. in the paper mill sludge, the treatment process that adopts generally is to burn or landfill, as Marimuthu P, Gunasekaran JP etc. are at IPPTA, and 1999,11 (1): 11-18. discloses the method that paper mill sludge is burned, but the incineration treatment method facility investment is big, and the incinerator that need involve great expense also will consume a large amount of fuel, from utilization of resources angle is irrational, and burns and cause secondary pollution.
The regeneration of paper mill sludge has many methods, is used to make fibre composite than macrofiber; The more mud of fibre-bearing can be used for producing lactic acid; Mud also can be used as fuel recovery energy etc.Mention that as Chinese patent CN1156126A thick screenings or paper waste in organism such as the xylogen that utilizes mud and the pulping and paper-making make fiberboard.
China does not authorize the preparation method that patent disclosure CN1282748A discloses a kind of paper mill sludge fiber filling agent, and it is to make it to form composite filler by processing such as drying, refinement, surface modifications.This method is that a new way is opened up in the comprehensive utilization of this mud.But this method does not provide effective means with regard to eliminate the stink that paper mill sludge produces in degraded, so be easy to generate the secondary pollution of air in preparation process, is unfavorable for promoting.
Along with plastics being extensive use of in all trades and professions, the annual waste or used plastics that produces of China forms " white pollution " more than 2,000,000 tons, and burning can produce a large amount of obnoxious flavoures, be embedded in underground need and just can degrade more than 200 years, severe exacerbation ecotope.Therefore, the regeneration of waste or used plastics has become an inexorable trend handling waste or used plastics.
China does not authorize patent disclosure CN1240807A, and disclose a kind of old thermoplastic polymer and flyash, fiber with recovery be matrix material of making of main raw material and preparation method thereof.This material fully utilizes old plastics and flyash, for increasing the intensity of matrix material, need to add a certain proportion of fiber and corresponding properties-correcting agent, thereby cost is improved, and manufacturing process is comparatively complicated in this method.
Therefore, the present invention is intended to utilize two kinds of wastes, and fully de-odorised paper mill sludge dry powder and waste and old compatible plastic resin are made matrix material as main raw material, and makes materials such as well lid, tree grate, water grate with this matrix material.
Summary of the invention
The present invention relates to make matrix material as main raw material with paper mill sludge and compatible waste or used plastics resin, weight with matrix material is benchmark, and this matrix material comprises: 50-60% (weight) paper mill sludge dry powder, 35-50% (weight) compatible plastic resin, 0-3% (weight) coupling agent and 0.01-3% (weight) additive.Additive comprises softening agent, stablizer, tinting material, lubricant and antioxidant etc.
The invention still further relates to the manufacture method of this matrix material.
The invention still further relates to the purposes of matrix material aspect grate shape materials such as manufacturing well lid, tree grate, water grate that makes above.
The detailed description of invention
The present invention relates to a kind of matrix material that utilizes paper mill sludge and compatible waste or used plastics resin manufacture, this matrix material is that benchmark comprises with its weight: 50-60% (weight) paper mill sludge dry powder, 35-50% (weight) compatible plastic resin, 0-3% (weight) coupling agent and 0.01-3% (weight) additive.
The coupling agent that the present invention uses is selected from Zinic stearas, aluminic acid ester and titanic acid ester, and its consumption is preferably 0.1-0.25% (weight).
Additive comprises the conventional additive that uses of field of plastics processing, as softening agent, stablizer, tinting material, lubricant etc.Because a certain amount of these additives are contained in compatible waste or used plastics Central Plains, therefore when making matrix material, can select the additive and the consumption thereof that add according to the performance of compatible waste or used plastics and to the performance of composites requirement.With matrix material weight is benchmark, the additive that comprises is as follows: 0-1% (weight), be preferably 0.15-0.25% (weight) softening agent, 0.01-0.5% (weight), be preferably 0.015-0.05% (weight) stablizer, 0-0.5% (weight) is preferably 0.1-0.15% (weight) tinting material, 0-1% (weight) is preferably 0.5-0.7% (weight) lubricant.
Paper mill sludge dry powder is that the granularity that obtains after paper mill sludge drying, the pulverizing is the 100-300 order, is preferably the 200-300 order, and water-content is 7-10% (weight), is preferably the fine powder of 6-8% (weight).
The waste or used plastics resin that uses also need have the consistency with paper mill sludge dry powder except performances such as needs have good physical strength, chemistry, rheology.The waste or used plastics resin compatible with the paper mill sludge powder comprises PVC, PP, PE, TDR, EVA, ABS, CDE etc.The matrix material of making has toughness height, intensity height, shock resistance, advantage such as ageing-resistant.
The invention still further relates to the method for utilizing paper mill sludge and compatible waste or used plastics resin manufacture matrix material, this method comprises the following steps:
1) prepare the paper mill sludge powder through the following steps:
A) pre-treatment: the weight by paper mill sludge is benchmark, adds the disinfectant of 0.6-1% (weight) in biochemical paper mill sludge, as hypochlorous acid, makes the bacterial count of mud be reduced to 1000-2000/milliliter by 20000-30000/milliliter;
B) drying: dry papermaking paper mill sludge, make its water-content drop to 7-10% (weight) by 60-65% (weight), be preferably 6-8% (weight);
C) pulverize: adopt conventional breaking method to pulverize dried mud, it is ground into the 10-300 order, be preferably 200-300 purpose dry powder;
2) preparation plastic tree cosmetics: the compatible plastic resin that reclaims is carried out sorting and cleaning, and crushed after being dried is to the 2-8 millimeter, and putting into the eddy current mill again, to be crushed to granularity be the 50-60 order;
3) preparation matrix material: high-speed stirring is mixed above-mentioned sludge dry powder, waste or used plastics powder and coupling agent, softening agent, stablizer, lubricant, additive, this material is put into the screw rod device or plastics processing mill is mixing extrudes, and makes matrix material.
Paper mill sludge can not carry out pre-treatment without biochemical treatment.Through the paper mill sludge of biochemical treatment because of containing a large amount of microorganisms, breeding and degraded take place in transportation and banking process, produce stench, for this reason, the present invention selects for use sterilant to go into hypochlorous acid raw material is carried out pre-treatment, improves and has solved the problem of environmental pollution that the mud stench brings.
When mud is pulverized after the drying,, preferably select the turbine type pulverizer for use for not influencing the character of fiber.
The invention still further relates to grate shape materials such as the well lid that uses above-mentioned matrix material to make, tree grate, water grate.
Can adopt paper mill sludge dry powder and waste and old compatible plastic resin made and mould base, then in mould hot pressing this mould blank molding.Or adopt and in extrusion system, paper mill sludge dry powder is mixed with the fused plastics, then the fused mixture is expressed into die for molding.
Grate shape materials such as well lid, tree grate, water grate must have intensity height, big, the anti-aging and shock proof performance of toughness, and its main performance index requires as follows:
Proportion (kg/m
3)
|
1300-1900 |
Ultimate compression strength (MPa) |
≥30 |
Folding strength (MPa) |
≥40 |
Toughness (Kj/m) |
≥95 |
Freeze-thaw resistance ultimate compression strength rate of loss (20 ℃) |
≤13% |
Thermal ageing folding strength relative change rate (80 ℃) |
≤0.4% |
Temper(ing) folding strength relative change rate (%) |
4 |
For reaching above-mentioned main performance index, in the matrix material of making said products, generally need to add the fiber (as synthon, natural fiber, steel fiber etc.) of 5-10% (weight) through the fibrillation processing.
Use paper mill sludge in the matrix material of the present invention, make full use of wooden staple fibre contained in the paper mill sludge.This fiber outside surface is wrapped up by trickle printing ink, talcum and carclazyte, in crushing process, pass through coupling agent treatment again, the interface interaction good with compatible waste or used plastics arranged,, reduced the cost of matrix material so in matrix material, need not to add again fiber and fibrillation auxiliary agent.Use grate shape materials such as well lid that matrix material of the present invention makes, tree grate, water grate, its performance reaches These parameters, and the said products that can replace ferrous metal to make is saved a large amount of ferrous metal resources and the energy.
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment 1
Get the granularity after crushed of having dried and be 40 kilograms in 100-300 purpose paper mill sludge powder, 30 kilograms in useless PP plastics that reclaim, Zinic stearas 100 grams and put into a machine, be warming up to 150-175 ℃ and carry out granule.
Above-mentioned granule is put into high-speed mixer, and adding lubricant 500 restrains, softening agent 100 restrains, stablizer 10 restrains, tinting material 100 restrains mixing 20 minutes, again this mixture is added in the conical double-screw machine hopper, extrude injection moulding, make section bars such as well lid, tree grate, water grate.
The performance of measuring section bar is as follows: ultimate compression strength: 31MPa; Folding strength: 17MPa; Toughness: 95Kj/m
3Freeze-thaw resistance ultimate compression strength rate of loss (20 ℃): 0.38%; Temper(ing) folding strength relative change rate: 3.2%; Thermal ageing folding strength relative change rate (80 ℃): 0.38%.
Embodiment 2
Get the granularity after crushed of having dried and be 37 kilograms in 100-300 purpose paper mill sludge powder, 5 kilograms in 30 kilograms in useless PP plastics, PE plastics reclaiming, Zinic stearas 70 grams and put into a machine, be warming up to 140-160 ℃ and carry out granule.
Above-mentioned granule is put into high-speed mixer, and adding lubricant 300 restrains, stablizer 10 restrains, tinting material 100 grams mixed 20 minutes, with in this mixture adding conical double-screw machine hopper, extrude injection moulding again, make section bars such as setting grate, water grate.
Embodiment 3
Get the granularity after crushed of having dried and be 26 kilograms in 100-300 purpose paper mill sludge powder, 4 kilograms of 4 kilograms in 8 kilograms in useless PVC plastics, PE plastics, ABS plastic reclaiming, Zinic stearas 100 grams and put into a machine, be warming up to 130-150 ℃ and carry out granule.
With the above-mentioned high-speed mixer of putting into, and adding lubricant 200 restrains, softening agent 100 restrains, stablizer 20 restrains, tinting material 50 restrains mixing 10 minutes, this mixture is added in the conical double-screw machine hopper again, make the thermoplastic base, hot compacting in mould is made section bars such as well lid, tree grate, water grate then.
The technician in field of the present invention should be appreciated that, do not departing under the scope and spirit of the present invention and can make amendment and change the present invention.Should be appreciated that the present invention is not subjected to the restriction in the illustrative embodiment of this announcement, these embodiment are that scope of the present invention only is subjected to the restriction of claims as an example.