CN113912922A - High-strength anti-seepage modified PE (polyethylene) inner and outer wall material and preparation method thereof - Google Patents
High-strength anti-seepage modified PE (polyethylene) inner and outer wall material and preparation method thereof Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
- C08L23/0861—Saponified vinylacetate
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K2003/3009—Sulfides
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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Abstract
The invention relates to the technical field of PE (polyethylene) inner and outer wall materials, in particular to a high-strength anti-seepage modified PE inner and outer wall material and a preparation method thereof. The outer wall of the high-strength anti-seepage modified PE inner and outer wall material is formed by blending biomass-based nano-micron structure functional materials, namely silicon carbon and PE, and the inner wall of the high-strength anti-seepage modified PE inner and outer wall material is formed by compounding PE/EVOH/MOS2 multi-element materials, and is characterized in that the outer wall material comprises, by weight, 50-80 parts of polyethylene, 20-50 parts of silicon carbon material, 0.5-2 parts of dispersant zinc stearate, 0.5-1 part of heat stabilizer PEP, 10100.15-0.5 part of antioxidant and 1680.15-0.5 part of antioxidant. The invention also provides a preparation method of the material. The invention provides a high-strength anti-seepage pipe material and a preparation method thereof, and solves the problems that the existing PE pipeline is easy to deform, break and damage and is corroded and damaged under the condition of long-term burying and compression.
Description
Technical Field
The invention relates to the technical field of PE (polyethylene) inner and outer wall materials, in particular to a high-strength anti-seepage modified PE inner and outer wall material and a preparation method thereof.
Background
At present, the domestic city construction belongs to the high-speed development stage, and the municipal works such as the transformation of old cities, the removal of villages in cities, the construction of new rural areas, the treatment of river channels and the like. Early city construction has insufficient attention to drainage systems and drainage equipment, so that serious waterlogging occurs in many cities in the rainy season in the season. Meanwhile, under the condition that a drainage system is not complete, water pollution is serious, and the protection measures of rain and sewage diversion and the work of domestic sewage parallel-pipe centralized treatment in new rural construction are provided. In the vigorous development and construction of municipal works, a large demand is brought to the drainage pipeline correspondingly. The early cement pipeline is improved to a steel pipe, and the plastic drainage pipeline is proposed by the national science and technology hall and the urban and rural construction committee. So the double-wall corrugated pipe is finally selected as the main drainage pipeline. However, the double-wall corrugated pipes produced by domestic pipeline manufacturers are all produced by adopting PE reclaimed materials and filling inorganic powder. When the pipe is pressed by being buried for a long time, the pipe is easily deformed and broken, and the blocking phenomenon of drainage is frequently caused. Wherein the filled pipe is more likely to damage the structure and surface thereof due to the acidity of rainwater and bacterial growth of sewage, and the long-term corrosion finally leads to the collapse of the pipeline.
Therefore, the formula improvement on the material of the pipe needs to be innovated more reasonably, and meanwhile, the preparation method of the high-strength anti-seepage modified PE inner and outer wall material is provided, so that the problem that the corrugated pipe is buried and pressed for a long time can be better solved.
Disclosure of Invention
The invention provides a high-strength anti-seepage modified PE inner and outer wall material and a preparation method thereof, aiming at the defects of the prior art, and solving the problems of easy deformation, breakage damage and erosion damage of the existing corrugated pipe under the condition of long-term burying and compression.
The technical scheme of the invention is realized as follows: the utility model provides a modified PE inside and outside wall material of high strength prevention of seepage, forms by outer wall material and inner wall material fuse, and its outer wall adopts living beings base nanometer micron structure functional material silicon charcoal and PE to blend, and its inner wall adopts PE/EVOH/MOS2 combined material to form its characterized in that: the material comprises, by weight, 50-80 parts of outer wall material polyethylene, 20-50 parts of silicon carbon material, 0.5-2 parts of dispersant zinc stearate, 0.5-1 part of heat stabilizer PEP, 10100.15-0.5 part of antioxidant and 1680.15-0.5 part of antioxidant.
The inner wall material comprises 50-80 parts of polyethylene, 20-50 parts of molybdenum disulfide, 10-40 parts of ethylene/vinyl alcohol copolymer, 0.5-2 parts of zinc stearate, 0.5-1 part of heat stabilizer PEP, 10100.1-0.5 part of antioxidant and 1680.1-0.5 part of antioxidant.
The polyethylene is low-pressure high-density polyethylene, the silicon-carbon ratio of the silicon-carbon material is 60:40, the fineness is 2000 meshes, the purity of the molybdenum disulfide is 99%, the fineness is 3000 meshes, and the ethylene/vinyl alcohol polymer is labeled V240R.
The invention also provides a preparation method of the high-strength anti-seepage modified PE inner and outer wall material, which is characterized by comprising the following steps:
outer wall material:
s1), performing high-temperature thermal activation, chemical treatment and the like on the surface of the silicon-carbon powder by adopting a surface treating agent to perform organic modification on the surface of the silicon-carbon powder; PDK02 is selected as the surface treating agent, and the addition amount is 1-10% for treatment;
s2), weighing the silicon carbon with the surface treated, the polyethylene, the dispersant zinc stearate, the heat stabilizer PEP, the antioxidant 1010 and the antioxidant 168 according to the weight ratio required by the formula;
s3), dry-mixing the components obtained in the step S2 in a high-speed mixer for 3-5 minutes, uniformly stirring, and putting into a feeding machine;
s4), feeding the material mixed in the step S3 into a feeder on a main machine through a feeding machine, and carrying out melting, shearing, plasticizing, extruding and granulating through a parallel double screw in the same direction to obtain the outer wall material of the product;
inner wall material:
s5), weighing polyethylene, ethylene/vinyl alcohol copolymer, molybdenum disulfide, dispersant zinc stearate, heat stabilizer PEP, antioxidant 1010 and antioxidant 168 according to the weight ratio required by the formula;
s6), dry-mixing the components obtained in the step S5 in a high-speed mixer for 5-10 minutes, uniformly stirring, and putting into a feeding machine;
s7), feeding the material mixed in the step S6 into a feeder on a main machine through a feeding machine, and carrying out melting, shearing, plasticizing, extruding and granulating through a parallel double screw in the same direction to obtain the inner wall material of the product;
s8), respectively adding the obtained outer wall material and inner wall material into two extruders for extrusion, heating, melting, plasticizing and conveying the materials to a die of a machine head through screws of the extruders, vacuumizing the inner wall material through an inner diameter sizing sleeve, cooling and shaping the inner wall material, and tightly contacting the outer wall material with a module for molding under the combined action of internal air pressure and external vacuum suction, so that the inner wall material and the outer wall material are uniformly fused together.
The silicon-carbon powder is subjected to high-temperature thermal activation, chemical treatment and the like to carry out reaction and carry out organic modification on the surface of the silicon-carbon powder. In the outer wall formula system, the silicon carbon material is processed by a reactive double screw when being blended with a high molecular polymer PE, and a modified active group on the surface of the silicon carbon material and a molecular chain of the polymer generate a mutual cross-linking phenomenon in the processing process. In the inner wall formula system, several diversified materials are blended and modified, so that the diversified materials are effectively presented as a good dispersed phase system, and the characteristic embodiment of the diversified materials is exerted. In the production modification through the reactive twin-screw, the equipment shearing screw block combination is adjusted to achieve better control of plasticizing reaction time. Meanwhile, the equipment adopts a double-vacuum system for deashing treatment, so that low-molecular materials are pumped out, and the performance of the materials is better guaranteed.
In a preferred embodiment, the silicon-carbon material in the outer wall material is organically modified, and a high polymer material is used for filling a fiber pore channel with high adsorbability in a breakthrough manner, so that the pore channel has elasticity, the toughness of the fiber is greatly improved, the surface of the silicon-carbon material is changed from complete hydrophilicity to proper lipophilicity, and the silicon-carbon material has the dual properties of inorganic property and organic property, fundamentally solves the problem that the silicon-carbon material is not uniformly dispersed in a high polymer matrix, embodies better intermiscibility when being blended with the high polymer, and is more beneficial to an extrusion granulation production process.
In a preferred embodiment, the silicon carbon material in the outer wall material belongs to a biomass-based nano-micron structural functional environment-friendly material which completely meets the national sanitation indexes, and the carbon material passes SGS, ROHS and SVHC detection, because the silicon carbon material reaches nanometer level and needs to be fully dispersed in PE through surface treatment modification, the silicon carbon material can be fully compatible with the PE to form dispersed phase in the PE, the compactness of the pipe is improved, the integral pressure resistance of the pipe is achieved, meanwhile, the nano-micron microporous structure attribute of the silicon-carbon material enables the pipes to be mutually adjusted under the conditions of impact and resonance, the good resilience of the pipes is fully displayed, the special silicon-carbon element arrangement of the silicon-carbon material highlights the metal-like rigidity characteristic of the material, the ring stiffness and the tensile strength of the pipes are effectively improved, and the high compactness has high firmness during butt welding of the pipes.
In a preferred embodiment, the blending modification of the inner wall multi-component material causes the molecular chains of the polymer to generate the phenomenon of mutual linkage, so that the polymer has better phase fusibility and has efficient plasticizing effect. Meanwhile, the material can well form the inner and outer nuclear phases of the melted high molecular polymer under the action of the double-screw shearing force.
The invention solves the defects in the background technology and has the following beneficial effects:
the invention provides a high-strength anti-seepage modified PE (polyethylene) inner and outer wall material and a preparation method thereof, and solves the problems that the existing corrugated pipe is easy to deform, break and damage and is corroded and damaged under the condition of long-term burying and pressing. The method has the following advantages:
1. the outer wall of the product is made of biomass-based nano-micron structural functional materials, namely silicon carbon and PE, and is subjected to blending alloy, so that the strength and rigidity of the outer wall of the double-wall corrugated pipe are improved, and the ring stiffness of 20MPA is achieved. Meanwhile, the added pipe made of the micro-nano structure material can be mutually adjusted under the conditions of impact and resonance, and the resilience of the outer wall material is fully displayed.
2. The inner wall of the product is made of PE/EVOH/MOS2 alloy, and the EVOH high-barrier material effectively blocks the erosion of rainwater and sewage and can completely block the smell of the sewage. Plays a key role mainly in pipe leakage. The MOS2 is added to form self-lubricating effect on the surface of the inner wall pipeline, so that the pipeline is more easy to fluency and has self-cleaning effect. The product can meet the use of the current domestic buried double-wall corrugated pipe for drainage and pollution discharge, in particular to the performance requirement of a large-caliber underground drainage and pollution discharge pipe.
Drawings
FIG. 1 is a process flow diagram of the preparation method of the high-strength impermeable modified PE inner and outer wall material.
Detailed Description
Example 1: the invention applies the comparison analysis in the double-wall corrugated pipe for drainage and pollution discharge
Selection indexes of HDPE materials: the melt index is 0.3-0.8 g/10min (190 ℃, 5KG), and the density: 0.96g/cm3The tensile strength: 26MPA, elongation at break: 350 percent.
The preparation method of the high-strength impermeable modified PE inner and outer wall material comprises the following steps of:
outer wall material:
s1), performing high-temperature thermal activation, chemical treatment and the like on the surface of the silicon-carbon powder by adopting a surface treating agent to perform organic modification on the surface of the silicon-carbon powder; the surface treating agent for the silicon-carbon material is compound ester series PDK02, and the addition amount is 0.3-5%.
S2), weighing the silicon carbon with the surface treated, the polyethylene, the dispersant zinc stearate, the heat stabilizer PEP, the antioxidant 1010 and the antioxidant 168 according to the weight ratio required by the formula;
s3), dry-mixing the components obtained in the step S2 in a high-speed mixer for 3-5 minutes, uniformly stirring, and putting into a feeding machine;
s4), feeding the material mixed in the step S3 into a feeder on a main machine through a feeding machine, and performing melting, shearing, plasticizing, extruding and granulating through a co-rotating parallel double-screw extruder to obtain the outer wall material of the product;
inner wall material:
s5), weighing polyethylene, ethylene/vinyl alcohol copolymer, molybdenum disulfide, dispersant zinc stearate, heat stabilizer PEP, antioxidant 1010 and antioxidant 168 according to the weight ratio required by the formula;
s6), dry-mixing the components obtained in the step S5 in a high-speed mixer for 5-10 minutes, uniformly stirring, and putting into a feeding machine;
s7), feeding the material mixed in the step S6 into a feeder on a main machine through a feeding machine, and performing melting, shearing, plasticizing, extruding and granulating through a co-rotating parallel double-screw extruder to obtain the inner wall material of the product.
S8), respectively adding the obtained outer wall material and inner wall material into two extruders for extrusion, heating, melting, plasticizing and conveying the materials to a die of a machine head through screws of the extruders, vacuumizing the inner wall material through an inner diameter sizing sleeve, cooling and shaping the inner wall material, and tightly contacting the outer wall material with a module for molding under the combined action of internal air pressure and external vacuum suction, so that the inner wall material and the outer wall material are uniformly fused together, namely, the fused materials are made into a finished pipeline. The implementation process of the invention is as follows:
1. silicon carbon material reaches the nanometer micron level and wants abundant dispersion must pass through surface treatment modification in PE, just can with the abundant compatibility of PE, form the dispersed phase in PE, improve the closely knit degree of tubular product, reach the whole compressive capacity of tubular product, silicon carbon material's the micron microporous structure attribute of receiving simultaneously, tubular product can have mutual regulation under the condition of impact and resonance, fully show the good resilience of tubular product, the special silicon carbon element of silicon carbon material arranges, the rigidity characteristic is like the metal of outstanding material, more effective ring rigidity and tensile strength who improves tubular product, stronger closely knit degree has stronger fastness when tubular product butt joint welding. Therefore, in the invention, the silicon carbon material is organically modified by the surface treating agent, and the high molecular material is used for filling the fiber pore canal with high adsorbability in a breakthrough manner, so that the pore canal has elasticity, the toughness of the fiber is greatly improved, the surface of the silicon carbon material is changed from complete hydrophilicity to proper lipophilicity, and the silicon carbon material has the dual properties of inorganic and organic, fundamentally solves the problem that the silicon carbon material is not uniformly dispersed in a high polymer matrix, and embodies better intermiscibility when being blended with the high molecular polymer.
2. According to the invention, the outer wall is modified by blending PE/silicon-carbon, special silicon-carbon elements are arranged, the metal-like rigidity characteristic of the material is highlighted, the ring rigidity and tensile strength of the pipe are effectively improved, and the high compactness has high firmness during butt welding of the pipe.
3. In the inner wall material, vinyl alcohol, molybdenum disulfide and polyethylene are sheared by utilizing a high-torque high-rotating-speed co-rotating parallel double screw, and then a good dispersion phase is formed by adding a dispersion auxiliary agent.
4. The inner wall of the invention adopts PE/EVOH/MOS2 alloy, wherein EVOH (ethylene/vinyl alcohol copolymer) high-barrier material effectively blocks the erosion of rain water and sewage, and can completely block the smell of the sewage. And the MOS2 is added to form the self-lubricating effect on the surface of the inner wall pipeline.
Example 2: the invention applies the comparison analysis in the double-wall corrugated pipe for drainage and pollution discharge
Selection indexes of HDPE materials: the melt index is 0.3-0.8 g/10min(190 ℃ C., 5KG), density: 0.96g/cm3Tensile strength: 26MPA, elongation at break: 350 percent
Selection indexes of LDPE materials: melt index 2.5g/10min (190 ℃, 2.16KG), density: 0.96g/cm3Tensile strength: 22MPA, elongation at break: 650 percent of,
The silicon carbon material surface treating agent is selected from aluminate series PDK101, and the addition amount of the silicon carbon material surface treating agent is 0.2-5%.
Example 3: the invention applies the comparison analysis in the double-wall corrugated pipe for drainage and pollution discharge
Selection indexes of HDPE materials: melt index is 0.3-0.8 g/10min (190 ℃, 5KG), density: 0.96g/cm3Tensile strength: 26MPA elongation at break: 350 percent.
Selection indexes of LDPE materials: melt index 2.5g/10min (190 ℃, 2.16KG), density: 0.96g/cm3The tensile strength: 22MPA, elongation at break: 650 percent.
The surface treating agent for the silicon carbon material is titanate series PDK202, and the addition amount of the surface treating agent is 0.2-5%.
Example 4: the invention applies the comparison analysis in the double-wall corrugated pipe for drainage and pollution discharge
Selection indexes of HDPE materials: the melt index is 0.3-0.8 g/10min (190 ℃, 5KG), and the density: 0.96g/cm3Tensile strength: 26MPA elongation at break: 350 percent.
Selection index of MDPE material: melt index 0.3g/10min (190 ℃, 5KG), density: 0.96g/cm3Tensile strength: 45MPA, elongation at break: 300 percent.
The surface treating agent for the silicon-carbon material is compound ester series PDK02, and the addition amount is 0.2-5%.
Example 5: the invention applies the comparison analysis in the double-wall corrugated pipe for drainage and pollution discharge
Selection indexes of HDPE materials: melt index is 0.3-0.8 g/10min (190 ℃, 5KG), density: 0.96g/cm3Tensile strength: 26MPA, elongation at break: 350 percent.
Selection indexes of LDPE materials: melt index 2.5g/10min (190 ℃, 2.16KG), density: 0.96g/cm3Tensile strength: 22MPA, elongation at break: 650 percent.
Selection index of MDPE material: melt index 0.3g/10min (190 ℃, 5KG), density: 0.96g/cm3Tensile strength: 45MPA, elongation at break: 300 percent.
The surface treating agent for the silicon-carbon material is compound ester series PDK02, and the addition amount is 0.2-5%.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The high-strength anti-seepage modified PE inner and outer wall material is formed by fusing an outer wall material and an inner wall material, and is characterized in that the outer wall material is formed by blending biomass-based nano-micron structural functional material silicon carbon and PE, the inner wall material is formed by compounding PE/EVOH/MOS2 multielement materials, and the outer wall material comprises, by weight, 50-80 parts of polyethylene, 20-50 parts of silicon carbon material, 0.5-2 parts of dispersant zinc stearate, 0.5-1 part of heat stabilizer PEP, 10100.15-0.5 part of antioxidant and 1680.15-0.5 part of antioxidant.
2. The high-strength impermeable modified PE inner and outer wall material as claimed in claim 1, wherein the inner wall material comprises, by weight, 50-80 parts of polyethylene, 20-50 parts of molybdenum disulfide, 10-40 parts of ethylene/vinyl alcohol copolymer, 0.5-2 parts of zinc stearate, 0.5-1 part of heat stabilizer PEP, 10100.1-0.5 part of antioxidant, and 1680.1-0.5 part of antioxidant.
3. The high-strength impermeable modified PE inner and outer wall material as claimed in claim 1, wherein the polyethylene is low-pressure high-density polyethylene, the silicon-carbon ratio of the silicon-carbon material is 60:40, the fineness is 2000 meshes, the purity of the molybdenum disulfide is 99%, the fineness is 3000 meshes, and the ethylene/vinyl alcohol polymer is V240R.
4. The preparation method of the high-strength impermeable modified PE inner and outer wall material based on the claims 1-3 is characterized by comprising the following steps:
outer wall material:
s1), performing high-temperature thermal activation, chemical treatment and the like on the surface of the silicon-carbon powder by adopting a surface treating agent to perform organic modification on the surface of the silicon-carbon powder;
s2), weighing the silicon carbon with the surface treated, the polyethylene, the dispersant zinc stearate, the heat stabilizer PEP, the antioxidant 1010 and the antioxidant 168 according to the weight ratio required by the formula;
s3), dry-mixing the components obtained in the step S2 in a high-speed mixer for 3-5 minutes, uniformly stirring, and putting into a feeding machine;
s4), feeding the material mixed in the step S3 into a feeder on a main machine through a feeding machine, and performing melting, shearing, plasticizing, extruding and granulating through a co-rotating parallel double-screw extruder to obtain the outer wall material of the product;
inner wall material:
s5), weighing polyethylene, ethylene/vinyl alcohol copolymer, molybdenum disulfide, dispersant zinc stearate, heat stabilizer PEP, antioxidant 1010 and antioxidant 168 according to the weight ratio required by the formula;
s6), dry-mixing the components obtained in the step S5 in a high-speed mixer for 5-10 minutes, uniformly stirring, and putting into a feeding machine;
s7), feeding the material mixed in the step S6 into a feeder on a main machine through a feeding machine, and performing melting, shearing, plasticizing, extruding and granulating through a co-rotating parallel double-screw extruder to obtain the inner wall material of the product;
s8), respectively adding the obtained outer wall material and inner wall material into two extruders for extrusion, heating, melting, plasticizing and conveying the materials to a die of a machine head through screws of the extruders, vacuumizing the inner wall material through an inner diameter sizing sleeve, cooling and shaping the inner wall material, and tightly contacting the outer wall material with a module for molding under the combined action of internal air pressure and external vacuum suction, so that the inner wall material and the outer wall material are uniformly fused together.
5. The preparation method of the high-strength impermeable modified PE inner and outer wall material as claimed in claim 4, wherein in the step S1, the surface treatment agent is PDK02, and the addition amount is 1-10%.
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