CN104774406A - Method for preparing PVC (polyvinyl chloride)-based wood-plastic composite material by using bamboo powder - Google Patents

Method for preparing PVC (polyvinyl chloride)-based wood-plastic composite material by using bamboo powder Download PDF

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Publication number
CN104774406A
CN104774406A CN201510199910.1A CN201510199910A CN104774406A CN 104774406 A CN104774406 A CN 104774406A CN 201510199910 A CN201510199910 A CN 201510199910A CN 104774406 A CN104774406 A CN 104774406A
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temperature
bamboo powder
pvc
minutes
plastic composite
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CN201510199910.1A
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Chinese (zh)
Inventor
李欣
黄超
李静静
李志钢
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Guilin University of Technology
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Guilin University of Technology
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Priority to CN201510199910.1A priority Critical patent/CN104774406A/en
Publication of CN104774406A publication Critical patent/CN104774406A/en
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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
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06—Homopolymers or copolymers of vinyl chloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/52—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders
    • B29B7/56—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders with co-operating rollers, e.g. with repeated action, i.e. the material leaving a set of rollers being reconducted to the same set or being conducted to a next set
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/72—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/52—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

The invention discloses a method for preparing a PVC (polyvinyl chloride)-based wood-plastic composite material by using bamboo powder. The method comprises the steps: sieving the bamboo powder with a sieve with the pore size of 20 meshes, soaking the sieved bamboo powder into a sodium hydroxide aqueous solution for alkalization treatment, then, washing with distilled water, and finally, drying, so as to prepare bamboo powder for later use; weighing raw materials, namely PVC, a mixed thermal stabilizer, a toughening agent, a lubrication regulator, filler and the bamboo powder, according to the following mass ratio of 95: 11.5: (10-20): 3: (10-20): (50-70), and mixing the raw materials in a high-speed stirring manner so as to prepare a mixed material; pouring the mixed material between two rollers of an open mill, plasticizing, and then, standing and cooling so as to prepare a plasticized material; pressing a die containing the plasticized material on a plate vulcanizing machine, thereby preparing the PVC-based wood-plastic composite material. According to the method disclosed by the invention, the operation is simple, and large-scale popularization and application are facilitated; due to the adding of various aids, the processing rheological property of processing engineering and key properties, such as hardness, thermal stability and impact resistance, of the material are improved.

Description

A kind of method utilizing bamboo powder to prepare PVC base wood-plastic composite material
Technical field
The invention belongs to wood plastic composite preparing technical field, particularly a kind of method utilizing bamboo powder to prepare PVC base wood-plastic composite material.
Background technology
Containing wood powder and plastics in wood plastic composite, therefore matrix material has had the advantage of timber and plastics concurrently: 1. good processing characteristics.Wood plastic composite includes plastics and fiber, therefore, has the processing characteristics that same timber is similar, can saw, can follow closely, can dig, and use carpenter's utensil to complete, and nail-holding ability is obviously better than other synthetic materialss.Mechanical property is better than wood materials.Nail-holding ability is generally 3 times of timber, is 5 times of shaving board.2. good strength property.Wood plastic composite includes plastics, thus has good Young's modulus.In addition, due to including fiber and through fully mixing with plastics, thus there is the resistance to compression suitable with hardwood, the physical and mechanical properties such as counter-bending, and its wearing quality is obviously better than normal wood material.Surface hardness is high, is generally 2 ~ 5 times of timber.3. there is water-fast, corrosion resistant performance, long service life.Wood-plastic material and products thereof, can anti-strong acid-base, water-fast, corrosion-resistant compared with timber, and not bacterial growth, is not easily damaged by worms, not long fungi.Long service life, can reach more than 50 years.4. excellent adjustable performance.By auxiliary agent, the changes such as plastics can be polymerized, foam, solidify, modification, thus the characteristic such as density, intensity changing Wood-plastic material, can also reach anti-aging, anti-electrostatic, the particular requirement such as fire-retardant.
Bamboo powder is of many uses, is novel energy-saving environment-friendly raw material.Can be used as the raw material that bamboo moulds the multiple products such as goods, mosquito-repellent incense, leather, clothes, papermaking, electrical equipment, daily necessities, coating, cat litter, chemical industry, insulating material, exterior decorative materials, material of construction.From the angle of raw materials for production, wood plastic composite slows down and eliminates the public hazards pollution of plastic refuse, also eliminates bamboo waste and piles up and burn the pollution brought to environment.
Because wood plastic composite has so many performance, just decide it will be widely used.1. construction industry.The floor of making by Wood Fiber Composites than superior many in low wood fibre board performance at present, not breathing, waterproof, surface aesthetic.If meet material for multilayer coextrusion section bar, internal layer adopts reclaimed materials, and outer employing virgin material, the every mechanical property of the goods made can compare favourably with hardwood products.2. the application of automobile industry.In recent years, Wood plastic boards, with its rational price, superior performance, is applied and is increased in automobile decoration material, as automobile door-plate, after put thing case, luggage case sidewall, seat plate etc.3. other industry.Except traditional industry, the Application Areas of matrix material constantly expands, started at present apply as pallet, flowerpot, handle for tool, office appliance, attack the engine components such as fast highway route marker, acoustic board and audio amplifier.
PVC price is lower, for the development of wood plastic composite provides price advantage.Polyvinyl chloride resin is simple linear polymer, has thermoplasticity.Due on molecular chain every a carbon atom just by the Cl atom that a negatively charged is stronger, thus molecular chain has stronger polarity, and the interaction force between macromolecular chain is large, hinders the Relative sliding between molecular chain.Therefore polyvinyl chloride resin macroscopically shows certain rigidity and hardness, and has good chemical resistance.
Summary of the invention
The object of this invention is to provide a kind of method utilizing bamboo powder to prepare PVC base wood-plastic composite material.
Concrete steps are:
(1) bamboo powder is crossed 20 mesh sieves, then be alkalinisation treatment 3 ~ 5 hours in the aqueous sodium hydroxide solution of 15 ~ 25% at mass percent concentration, alkalization temperature is 30 ~ 40 DEG C, and then with distilled water wash 3 ~ 4 times, alkali on removing bamboo powder and other impurity, last at 105 DEG C drying treatment 5 hours, obtained bamboo powder for subsequent use.
(2) raw material is taken according to following mass ratio, PVC: mixture heat stablizer: toughner: lubrication conditioning agent: filler: bamboo powder=95:11.5:10 ~ 20:3:10 ~ 20:50 ~ 70 for subsequent use that step (1) is obtained, raw material is mixed, stir with the speed of 3000 ~ 6000 revs/min, obtained mixture.
(3) the front roll temperature arranging mill is 1600 DEG C, rear roll temperature is also 1600 DEG C, after the temperature of mill rises to the temperature of setting, constant temperature 10 minutes, then opens mill, and the mixture that step (2) is obtained is poured between two rollers of mill, plasticate 3 ~ 4 minutes, material is taken off, places cooling, obtained material of plasticating.
(4) vulcanizing press is heated, the temperature arranging top plate is 1950 DEG C, the temperature of lower bolster is 1950 DEG C, treat that temperature rises to the temperature of setting, constant temperature 10 minutes, mould to be placed between two templates preheating 20 minutes, then mould is opened, the material of plasticating that step (3) is obtained is put into the die cavity of mould, to cover in template that mould puts it to vulcanizing press preheating again 10 minutes, carry out first time exhaust, mold pressing 5 minutes under 8 ~ 10Mpa after exhaust, carry out second time exhaust again, then mold pressing 6 minutes under 8 ~ 10Mpa, cool, treat that temperature drops to 900 DEG C, pressure release, take out mould, and open, the plate be pressed into is taken out, naturally cooling under room temperature, i.e. obtained PVC base wood-plastic composite material.
The model that described PVC selects is SG7.
Described mixture heat stablizer is containing the metal algae stablizer BaSt of the lead sulfate tribasic of 3 mass parts, the Dythal of 1.5 mass parts and 7 mass parts.
Described toughner is methyl methacrylate-divinyl-styrene copolymer.
Described lubrication conditioning agent is lubricant HSt.
Described filler is MgCO 3.
The inventive method is simple to operate, is easy to large-scale promotion application, and adding by various auxiliary agent, improves hardness, the key property such as thermostability and shock resistance of rheological performance in process engineering and material.
Embodiment
embodiment:
(1) bamboo powder is crossed 20 mesh sieves, then be alkalinisation treatment 4 hours in the aqueous sodium hydroxide solution of 20% at mass percent concentration, alkalization temperature is 35 DEG C, and then with distilled water wash 4 times, alkali on removing bamboo powder and other impurity, last at 105 DEG C drying treatment 5 hours, obtained bamboo powder for subsequent use.
(2) raw material is taken according to following mass ratio, PVC: mixture heat stablizer: toughner: lubrication conditioning agent: filler: bamboo powder=95:11.5:15:3:15:60 for subsequent use that step (1) is obtained, raw material is mixed, stirs with the speed of 4500 revs/min, obtained mixture.
(3) the front roll temperature arranging mill is 1600 DEG C, rear roll temperature is also 1600 DEG C, after the temperature of mill rises to the temperature of setting, constant temperature 10 minutes, then opens mill, and the mixture that step (2) is obtained is poured between two rollers of mill, plasticate 3.5 minutes, material is taken off, places cooling, obtained material of plasticating.
(4) vulcanizing press is heated, the temperature arranging top plate is 1950 DEG C, the temperature of lower bolster is 1950 DEG C, treat that temperature rises to the temperature of setting, constant temperature 10 minutes, mould to be placed between two templates preheating 20 minutes, then mould is opened, the material of plasticating that step (3) is obtained is put into the die cavity of mould, to cover in template that mould puts it to vulcanizing press preheating again 10 minutes, carry out first time exhaust, mold pressing 5 minutes under 9Mpa after exhaust, carry out second time exhaust again, then mold pressing 6 minutes under 9Mpa, cool, treat that temperature drops to 900 DEG C, pressure release, take out mould, and open, the plate be pressed into is taken out, naturally cooling under room temperature, i.e. obtained PVC base wood-plastic composite material.
The model that described PVC selects is SG7.
Described mixture heat stablizer is containing the metal algae stablizer BaSt of the lead sulfate tribasic of 3 mass parts, the Dythal of 1.5 mass parts and 7 mass parts.
Described toughner is methyl methacrylate-divinyl-styrene copolymer.
Described lubrication conditioning agent is lubricant HSt.
Described filler is MgCO 3.
The hardness of the wood plastic composite that the present embodiment obtains is 82.37, and shock strength is 6.039 KJ/m 2, tensile strength is 61.973 MPa, all comparatively excellent.

Claims (1)

1. utilize bamboo powder to prepare a method for PVC base wood-plastic composite material, it is characterized in that concrete steps are:
(1) bamboo powder is crossed 20 mesh sieves, then be alkalinisation treatment 3 ~ 5 hours in the aqueous sodium hydroxide solution of 15 ~ 25% at mass percent concentration, alkalization temperature is 30 ~ 40 DEG C, and then with distilled water wash 3 ~ 4 times, alkali on removing bamboo powder and other impurity, last at 105 DEG C drying treatment 5 hours, obtained bamboo powder for subsequent use;
(2) raw material is taken according to following mass ratio, PVC: mixture heat stablizer: toughner: lubrication conditioning agent: filler: bamboo powder=95:11.5:10 ~ 20:3:10 ~ 20:50 ~ 70 for subsequent use that step (1) is obtained, raw material is mixed, stir with the speed of 3000 ~ 6000 revs/min, obtained mixture;
(3) the front roll temperature arranging mill is 1600 DEG C, rear roll temperature is also 1600 DEG C, after the temperature of mill rises to the temperature of setting, constant temperature 10 minutes, then opens mill, and the mixture that step (2) is obtained is poured between two rollers of mill, plasticate 3 ~ 4 minutes, material is taken off, places cooling, obtained material of plasticating;
(4) vulcanizing press is heated, the temperature arranging top plate is 1950 DEG C, the temperature of lower bolster is 1950 DEG C, treat that temperature rises to the temperature of setting, constant temperature 10 minutes, mould to be placed between two templates preheating 20 minutes, then mould is opened, the material of plasticating that step (3) is obtained is put into the die cavity of mould, to cover in template that mould puts it to vulcanizing press preheating again 10 minutes, carry out first time exhaust, mold pressing 5 minutes under 8 ~ 10Mpa after exhaust, carry out second time exhaust again, then mold pressing 6 minutes under 8 ~ 10Mpa, cool, treat that temperature drops to 900 DEG C, pressure release, take out mould, and open, the plate be pressed into is taken out, naturally cooling under room temperature, i.e. obtained PVC base wood-plastic composite material,
The model that described PVC selects is SG7;
Described mixture heat stablizer is containing the metal algae stablizer BaSt of the lead sulfate tribasic of 3 mass parts, the Dythal of 1.5 mass parts and 7 mass parts;
Described toughner is methyl methacrylate-divinyl-styrene copolymer;
Described lubrication conditioning agent is lubricant HSt;
Described filler is MgCO 3.
CN201510199910.1A 2015-04-25 2015-04-25 Method for preparing PVC (polyvinyl chloride)-based wood-plastic composite material by using bamboo powder Pending CN104774406A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105038019A (en) * 2015-07-29 2015-11-11 苏州天健竹业科技有限公司 Bicycle frame containing bamboo fiber and preparation method of bicycle frame
CN105061925A (en) * 2015-07-31 2015-11-18 桂林理工大学 Method for preparation of PVC based wood plastic composite material from walnut shell powder
CN107297912A (en) * 2017-07-07 2017-10-27 浙江国丰新材料科技有限公司 A kind of building plastic formwork and preparation method
CN112592598A (en) * 2020-12-11 2021-04-02 广东炜田环保新材料股份有限公司 High-bearing-capacity tray and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
周大纲 等: "《土工合成材料制造技术及性能》", 31 March 2001, 中国轻工业出版社 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105038019A (en) * 2015-07-29 2015-11-11 苏州天健竹业科技有限公司 Bicycle frame containing bamboo fiber and preparation method of bicycle frame
CN105061925A (en) * 2015-07-31 2015-11-18 桂林理工大学 Method for preparation of PVC based wood plastic composite material from walnut shell powder
CN107297912A (en) * 2017-07-07 2017-10-27 浙江国丰新材料科技有限公司 A kind of building plastic formwork and preparation method
CN112592598A (en) * 2020-12-11 2021-04-02 广东炜田环保新材料股份有限公司 High-bearing-capacity tray and preparation method thereof

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Application publication date: 20150715