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CN105585767A - Porous rotationally-molded product and preparation method thereof - Google Patents

Porous rotationally-molded product and preparation method thereof Download PDF

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Publication number
CN105585767A
CN105585767A CN201510534460.7A CN201510534460A CN105585767A CN 105585767 A CN105585767 A CN 105585767A CN 201510534460 A CN201510534460 A CN 201510534460A CN 105585767 A CN105585767 A CN 105585767A
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CN
China
Prior art keywords
porous
powder
polyethylene
rotomoulded articles
preparation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510534460.7A
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Chinese (zh)
Inventor
温原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHEJIANG ROTOUN PLASTIC TECHNOLOGY Co Ltd
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ZHEJIANG ROTOUN PLASTIC TECHNOLOGY Co Ltd
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Publication date
Application filed by ZHEJIANG ROTOUN PLASTIC TECHNOLOGY Co Ltd filed Critical ZHEJIANG ROTOUN PLASTIC TECHNOLOGY Co Ltd
Priority to CN201510534460.7A priority Critical patent/CN105585767A/en
Publication of CN105585767A publication Critical patent/CN105585767A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/16Halogen-containing compounds
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/04Oxygen-containing compounds
    • C08K5/15Heterocyclic compounds having oxygen in the ring
    • C08K5/151Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
    • C08K5/1535Five-membered rings
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions 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
    • C08L23/04Homopolymers or copolymers of ethene
    • C08L23/08Copolymers of ethene
    • C08L23/0807Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms
    • C08L23/0815Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms with aliphatic 1-olefins containing one carbon-to-carbon double bond
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/16Halogen-containing compounds
    • C08K2003/162Calcium, strontium or barium halides, e.g. calcium, strontium or barium chloride

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

The invention discloses a porous rotationally-molded product and a preparation method thereof. The porous rotationally-molded product is prepared from, by mass, 50.0-99.5% of polyethylene powder and 0.5-50.0% of soluble powder. By means of the porous rotationally-molded product and the preparation method, the complex process of punching conducted through existing machines is avoided, the operation process is simplified, and the production efficiency is improved.

Description

A kind of porous rotomoulded articles and preparation method thereof
Technical field
The present invention relates to a kind of plastic products, particularly a kind of porous rotomoulded articles and preparation method thereof.
Background technology
Rotation molding is a kind of plastic processing mode of utilizing the mould of rotation to process, and it was processedCheng Shi, drops into mould by plastic powders or slurry, and the mould after closure is rotated or shakes on equipmentPendulum heats mould outside by naked light or hot blast simultaneously, and plastic powders or slurry are being heatedUnder state in mould interior overturn, flow, temperature is progressively applied to mould inner surface after reaching softening point,Melting is also condensed, mould is put under natural environment or by the media such as water, mist, wind carry out cooling afterGoods are taken out in form removal.
The plastic products that use rotational molding technique processing, major part belongs to hollow container, be used for splendid attire water andVarious chemical solutions. Rotomoulded articles wall is closely knit, continuous, non-leakage plastic layer. At someField, buoyancy aid, the sight of blocking water plant as the preliminary filtration storage tank of water treatment procedure, the river course water surfaceThe cultivating trays of reward property plant etc., need rotomoulded articles to have a large amount of holes and come filtered water or other liquid.Can only meet by the post-processed method with mechanical punching at present the instructions for use of porous, existProblem: complex operation, production efficiency is low.
Summary of the invention
The object of the invention is to overcome prior art above shortcomings, a kind of porous rotational moulding is providedGoods provide its preparation method simultaneously, have avoided the complicated processes of existing use mechanical punching,Simplify operating procedure, improved production efficiency.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of porous rotomoulded articles, is mixed by the raw material components of following mass percent meter: polyethylene powderEnd 50.0-99.5%, soluble powder 0.5-50.0%.
The ratio of controlling polyethylene powders and soluble powder is very crucial. Inventor is through studying for a long period of timeFind, in the process of rotational moulding, in plastic powders, add the specific soluble powder of specified quantitative, logicalCross the improvement of technique, can produce two kinds of even plastic products of powder distribution, then plastic products are soakedEnter to a period of time in specific solution, by soluble powder stripping, just can directly produce porousThe rotomoulded articles of shape, thus the loaded down with trivial details mode that uses machine drilling to process avoided, improve and produced effectRate, has easy processing, and surface effect is good, the feature of good penetrability.
As preferably, described polyethylene powders bulk density is 0.250-0.500g/cm3, powder fluidity≤30s/100g, melt flow rate (MFR) (190 DEG C, 2.16Kg) is 1.0-20.0g/10min.
As preferably, the bulk density of described polyethylene powders is 0.300-0.400g/cm3, powder fluidity≤ 30s/100g, melt flow rate (MFR) (190 DEG C, 2.16Kg) is 3.0-7.0g/10min.
As preferably, the particle diameter distribution D98≤600 μ m of described polyethylene powders, D10 >=150 μ m.
Control the parameter of polyethylene powders as bulk density, powder fluidity, melt flow rate (MFR), grainThe effect that footpath distributes is mainly 1, uses the moulding smoothly of rotational moulding processing technology, and product defect is few; 2,With the requirement collocation of soluble powder, otherwise moulding smoothly.
As preferably, described soluble powder be and polyethylene inconsistent, can be dissolved in water, acid, alkali orIn organic solvent, form is spherical, needle-like, sheet or fibrous, and its fusing point >=250 DEG C, dissolveDegree >=2g/100g, the solid state powder of particle diameter distribution D98≤850 μ m.
As preferably, described soluble powder be and polyethylene inconsistent, can be dissolved in water formFor spherical, its fusing point >=300 DEG C, solubility >=10g/100g, particle diameter distribution D98≤850 μ m,The solid state powder of D10 >=150 μ m.
The object that the fusing point of control soluble powder, solubility, particle diameter distribute is: fusing point is low, is rollingMould in processing and can melt or soften, effect disappears, and solubility is little, and later stage stripping smoothly formsNot cavity, particle diameter will be arranged in pairs or groups with polyethylene powders, can not layering in rotational moulding process.
As preferably, described soluble powder is selected from sodium chloride, potassium chloride, calcium chloride, aluminum sulfate, sulfuric acidA kind of in copper, magnesium sulfate, sodium sulphate, sodium carbonate, sodium nitrate, potassium nitrate, phenolphthalein, starch orSeveral mixtures.
Select above-mentioned specific soluble powder, first incompatible with polyethylene, then in polyethyleneDisperse more evenly, good water solubility, easily soaks and removes.
A preparation method for porous rotomoulded articles, comprises the following steps:
(1) by polyethylene powders and soluble powder, on middling speed mixer, mix in proportion, mixTechnological parameter is: rotating speed 5-50rpm, incorporation time 3-20min;
(2) powder step (1) being mixed drops in mould, through rotational molding machine machine-shaping goods.
(3) the good goods of rotation molding are put into solvent and soak, soaking temperature 10-60 DEG C, soak time1-48h。
As preferably, step (2) rotational molding machine working process parameter is: oven temperature 190-300 DEG C, rotating speed3-20rpm, heat time 15-40min, cool time 20-40min.
As preferably, the described solvent of step (3) is water, ethanol or formic acid. Ethanol mass concentration 98%, firstAcid is anhydrous formic acid, analyzes pure level.
The invention has the beneficial effects as follows:
(1) porous rotomoulded articles of the present invention, processing technology is simple, has avoided existing use machinery to beatThe complicated processes in hole, has simplified operating procedure, has improved production efficiency.
(2) preparation method of the present invention is simple, without complex apparatus, easily realizes industrialization operation.
Detailed description of the invention
Below by specific embodiment, technical scheme of the present invention is described in further detail.
In the present invention, if not refer in particular to, raw material and the equipment etc. adopting all can be buied from market or thisField is commonly used. Method in following embodiment, if no special instructions, is the routine side of this areaMethod.
The raw material that the present invention uses is commercially available prod. Wherein polyethylene is direct from manufacturer buysUse. LLDPELL6201RQ, Thailand that the preferred trade mark of polyethylene powders is Exxon Mobil CorporationLLDPE735RUP, the LLDPE3204RUP of company of Siam of state. Wherein soluble powder is citySell SILVER REAGENT powder.
Polyethylene powders meets parameter: bulk density is 0.250-0.500g/cm3, powder fluidity≤30s/100g, melt flow rate (MFR) (190 DEG C, 2.16Kg) is 1.0-20.0g/10min. Particle diameter distributesD98≤600μm,D10≥150μm。
Soluble powder meets parameter:: and polyethylene is inconsistent, can be dissolved in water, form is ballShape, its fusing point >=300 DEG C, solubility >=10g/100g, particle diameter distribution D98≤850 μ m,The solid state powder of D10 >=150 μ m.
Embodiment 1
By the sodium chloride powder of 50.0% polyethylene powders (LLDPELL6201RQ) and 50.0%,On middling speed mixer, mix in proportion, hybrid technique parameter is: rotating speed 50rpm, and when mixingBetween 3min. The powder mixing is dropped in mould, through rotational molding machine machine-shaping goods, processing technologyParameter is: 190 DEG C of oven temperatures, rotating speed 20rpm, heat time 40min, cool time 40min.The good goods of rotation molding are put into water and soak, 23 DEG C of soaking temperatures, soak time 48h.
Embodiment 2
By the calcium chloride powder of 80.0% polyethylene powders (LLDPE3204RUP) and 20%, pressRatio is mixed on middling speed mixer, and hybrid technique parameter is: rotating speed 5rpm, incorporation time20min. The powder mixing is dropped in mould, through rotational molding machine machine-shaping goods, processing technology ginsengNumber is: 300 DEG C of oven temperatures, rotating speed 3rpm, heat time 15min, cool time 20min. WillThe goods that rotation molding is good are put into water and are soaked, 60 DEG C of soaking temperatures, soak time 1h.
Embodiment 3
By the phenolphthalein powder of 99.5% polyethylene powders (LLDPE735RUP) and 0.5%, by thanExample is mixed on middling speed mixer, and hybrid technique parameter is: rotating speed 30rpm, incorporation time15min. The powder mixing is dropped in mould, through rotational molding machine machine-shaping goods. Processing technology ginsengNumber is: 250 DEG C of oven temperatures, rotating speed 10rpm, heat time 30min, cool time 30min.The good goods of rotation molding are put into ethanol (mass concentration 98%) and soak, 23 DEG C of soaking temperatures,Soak time 24h.
Embodiment 4
By the starch powder of 75.0% polyethylene powders (LLDPE735RUP) and 25.0%, by thanExample is mixed on middling speed mixer, and hybrid technique parameter is: rotating speed 40rpm, incorporation time10min. The powder mixing is dropped in mould, through rotational molding machine machine-shaping goods. Processing technology ginsengNumber is: 220 DEG C of oven temperatures, rotating speed 7rpm, heat time 30min, cool time 40min. WillThe goods that rotation molding is good are put in formic acid (anhydrous formic acid, analyzes pure level, commercially available) and are soaked, and soak10 DEG C of temperature, soak time 48h.
Porous rotomoulded articles of the present invention, processing technology is simple, has avoided existing use mechanical punchingComplicated processes, has simplified operating procedure, has improved production efficiency, and preparation method is simple, without complexityEquipment, easily realizes industrialization operation. The present invention is for the preparation of cavernous rotational moulding plastic products, as mistakeWater filtering tank, culturing disk, buoyancy aid etc.
Above-described embodiment is preferably scheme of one of the present invention, not the present invention is appointedWhat pro forma restriction also has other under the prerequisite that does not exceed the technical scheme that claim recordsVariant and remodeling.

Claims (10)

1. a porous rotomoulded articles, is characterized in that, is mixed by the raw material components of following mass percent meterMake: polyethylene powders 50.0-99.5%, soluble powder 0.5-50.0%.
2. a kind of porous rotomoulded articles according to claim 1, is characterized in that: described polyethylene powderEnd bulk density is 0.250-0.500g/cm3, powder fluidity≤30s/100g, melt flow rate (MFR) is1.0-20.0g/10min。
3. a kind of porous rotomoulded articles according to claim 2, is characterized in that: described polyethylene powderThe bulk density at end is 0.300-0.400g/cm3, powder fluidity≤30s/100g, melt flow rate (MFR)For 3.0-7.0g/10min.
4. according to a kind of porous rotomoulded articles described in claim 1 or 2 or 4, it is characterized in that: described inThe particle diameter distribution D98≤600 μ m of polyethylene powders, D10 >=150 μ m.
5. a kind of porous rotomoulded articles according to claim 1, is characterized in that: described soluble powderEnd is inconsistent with polyethylene, can be dissolved in water, acid, alkali or organic solvent, and form is ballShape, needle-like, sheet or fibrous, its fusing point >=250 DEG C, solubility >=2g/100g, particle diameter distributesThe solid state powder of D98≤850 μ m.
6. a kind of porous rotomoulded articles according to claim 5, is characterized in that: described soluble powderEnd is inconsistent with polyethylene, can be dissolved in water, and form is spherical, its fusing point >=300 DEG C,Solubility >=10g/100g, particle diameter distribution D98≤850 μ m, the solid state powder of D10 >=150 μ m.
7. a kind of porous rotomoulded articles according to claim 1, is characterized in that: described soluble powderEnd is selected from sodium chloride, potassium chloride, calcium chloride, aluminum sulfate, copper sulphate, magnesium sulfate, sodium sulphate, carbonThe mixture of one or more in acid sodium, sodium nitrate, potassium nitrate, phenolphthalein, starch.
8. the preparation method of a kind of porous rotomoulded articles as claimed in claim 1, is characterized in that, comprisesFollowing steps:
(1) by polyethylene powders and soluble powder, on middling speed mixer, mix in proportion, mixTechnological parameter is: rotating speed 5-50rpm, incorporation time 3-20min;
(2) powder step (1) being mixed drops in mould, through rotational molding machine machine-shaping goods;
(3) the good goods of rotation molding are put into solvent and soak, soaking temperature 10-60 DEG C, soak time1-48h。
9. preparation method according to claim 8, is characterized in that: the processing of step (2) rotational molding machineTechnological parameter is: oven temperature 190-300 DEG C, and rotating speed 3-20rpm, heat time 15-40min is coldBut time 20-40min.
10. preparation method according to claim 8, is characterized in that: the described solvent of step (3) isWater, ethanol or formic acid.
CN201510534460.7A 2015-08-27 2015-08-27 Porous rotationally-molded product and preparation method thereof Pending CN105585767A (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106609502A (en) * 2016-12-21 2017-05-03 浙江瑞堂塑料科技有限公司 Plastic car stopping device with stone-like effect
CN108473714A (en) * 2015-10-09 2018-08-31 惠普发展公司,有限责任合伙企业 Particle mixture
CN109535614A (en) * 2018-12-18 2019-03-29 上海三爱富新材料科技有限公司 The preparation method of fiber reinforcement porous fluoropolymer polymer
CN111253669A (en) * 2019-12-23 2020-06-09 浙江瑞堂塑料科技股份有限公司 Rotational molding product with nano-structure surface and manufacturing process thereof
CN116655994A (en) * 2023-05-22 2023-08-29 罗摩材料(深圳)有限公司 Porous polyethylene device and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102604146A (en) * 2012-03-20 2012-07-25 中国科学院力学研究所 Inorganic bioactive material and method for preparing polymer porous composite material
CN102977485A (en) * 2012-10-31 2013-03-20 蚌埠凯盛工程技术有限公司 Nanometer attapulgite-modified chlorosulfonated polyethylene rubber gasket and preparation method thereof
CN103571026A (en) * 2012-07-20 2014-02-12 中国石油化工股份有限公司 Aging-resistant polyethylene resin specially used for rotational moulding, and preparation method thereof
CN104448514A (en) * 2014-11-03 2015-03-25 重庆和泰塑胶股份有限公司 Breathable resin with high breathability and preparation method of breathable resin

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102604146A (en) * 2012-03-20 2012-07-25 中国科学院力学研究所 Inorganic bioactive material and method for preparing polymer porous composite material
CN103571026A (en) * 2012-07-20 2014-02-12 中国石油化工股份有限公司 Aging-resistant polyethylene resin specially used for rotational moulding, and preparation method thereof
CN102977485A (en) * 2012-10-31 2013-03-20 蚌埠凯盛工程技术有限公司 Nanometer attapulgite-modified chlorosulfonated polyethylene rubber gasket and preparation method thereof
CN104448514A (en) * 2014-11-03 2015-03-25 重庆和泰塑胶股份有限公司 Breathable resin with high breathability and preparation method of breathable resin

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108473714A (en) * 2015-10-09 2018-08-31 惠普发展公司,有限责任合伙企业 Particle mixture
CN106609502A (en) * 2016-12-21 2017-05-03 浙江瑞堂塑料科技有限公司 Plastic car stopping device with stone-like effect
CN109535614A (en) * 2018-12-18 2019-03-29 上海三爱富新材料科技有限公司 The preparation method of fiber reinforcement porous fluoropolymer polymer
CN111253669A (en) * 2019-12-23 2020-06-09 浙江瑞堂塑料科技股份有限公司 Rotational molding product with nano-structure surface and manufacturing process thereof
CN116655994A (en) * 2023-05-22 2023-08-29 罗摩材料(深圳)有限公司 Porous polyethylene device and preparation method thereof
CN116655994B (en) * 2023-05-22 2024-04-05 罗摩材料(深圳)有限公司 Porous polyethylene device and preparation method thereof

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Application publication date: 20160518