CN102942730A - Method for modifying high density polyethylene to prepare chemical container - Google Patents
Method for modifying high density polyethylene to prepare chemical container Download PDFInfo
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- CN102942730A CN102942730A CN2012104842724A CN201210484272A CN102942730A CN 102942730 A CN102942730 A CN 102942730A CN 2012104842724 A CN2012104842724 A CN 2012104842724A CN 201210484272 A CN201210484272 A CN 201210484272A CN 102942730 A CN102942730 A CN 102942730A
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- density polyethylene
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Abstract
The invention discloses a method for modifying high density polyethylene to prepare a chemical container, belongs to the method for modification of polymer materials and relates to a method for modification of high density polyethylene container materials. The method comprising steps of evenly mixing 70-80% by mass of high density polyethylene, 15-25% by mass of ultra-high molecular weight polyethylene, 2-3% by mass of nano montmorillonite and 2-3% by mass of nano calcium carbonate, feeding the mixture to an extruding machine of the screw rod length-diameter ratio of more than 28 for plasticizing processing and conducting blow molding through a die. The barrel temperature of the extruding machine is in a range from 155 DEG C to 180 DEG C, the extruding speed is 100kg/cm<2>, the die temperature is in a range from 50 DEG C to 60 DEG C, the mold clamping force is 250 N/m<2>, the blow molding time is in a range from 50 seconds to 70 seconds, and the blowing pressure is 4.5 MPa. The produced plastic container has the advantages of being high in chemical penetration resistance, good in low temperature impact resistance, difficult to scale and capable of saving materials.
Description
Technical field
The present invention relates to a kind of preparation method of plastic containers, relate in particular to and a kind of high density polyethylene(HDPE) is carried out the method that modification prepares plastic containers.
Background technology:The characteristics such as high density polyethylene(HDPE) (HDPE) has the wet good penetrability of resistance, and processing characteristics is good, and is nontoxic, tasteless, odorless are used widely in Plastic Packaging Materials.Yet it is bad to the barrier of oxygen, carbonic acid gas and hydrocarbons that high density polyethylene(HDPE) exists, and the shortcoming such as self-cleaning is poor, and environmental stress crack resistance is poor, and low temperature impact properties is bad.During the containers store food made of high density polyethylene(HDPE), easily cause food spoilage, spoiled; Seepage can appear when being used for splendid attire varsol pharmaceutical chemicals.
Summary of the invention:For the defects that exists in the prior art, the present invention aims to provide and a kind of high density polyethylene(HDPE) is carried out the method that modification prepares pressure vessels for the chemical industry, utilizes that the pressure vessels for the chemical industry of the inventive method preparation has that osmotic-pressure-tolerant is good, wear resistance and the characteristics such as environmental stress crack resistance is good, comprehensive physical good mechanical property.
In order to realize the foregoing invention purpose, the present invention adopts technical scheme to comprise raw material is sent into forcing machine and carries out plastics processing, the mould blow molding; Calculate by mass percentage, described raw material is mixed by high density polyethylene(HDPE) 70～80%, ultrahigh molecular weight polyethylene(UHMWPE) 15～25%, nano imvite 2～3%, nano-calcium carbonate 2～3%; Wherein, a temperature of boiling in water for a while, then dress with soy, vinegar, etc. of the screw slenderness ratio of described forcing machine＞28, forcing machine is that 155～180 ℃, rate of extrusion are 100Kg/cm
2, die temperature is that 50～60 ℃, mold clamping pressure are 250N/m
2, the blow molding time is that 50～70S, blow gas pressure are 4.5Mpa.
On the basis of technique scheme, the preferred technical solution of the present invention is: high density polyethylene(HDPE) is 75%, ultrahigh molecular weight polyethylene(UHMWPE) is 20%, nano imvite is 2%, nano-calcium carbonate is 3% to mix; A temperature of boiling in water for a while, then dress with soy, vinegar, etc. of forcing machine is that 170 ℃, die temperature are that 55 ℃, blow molding time are 60S.
Compared with the prior art, the present invention carries out blending and modifying owing to having added ultrahigh molecular weight polyethylene(UHMWPE) (UHMWPE) in high density polyethylene(HDPE), utilizes low humidity toughness, erosion resistance and the self lubricity of ultrahigh molecular weight polyethylene(UHMWPE), withstand voltage frost resistance, ant-scaling and the good characteristics such as melt strength to improve the physics and chemistry performance of high density polyethylene(HDPE); Therefore effectively improved anti-osmotic energy, wear resistance and the low-temperature impact resistance etc. of plastic containers, and container is less scaling, self-cleaning is good, but Reusability is tens of inferior.Owing to having added nano imvite, so the slip between the nano imvite lamella can strengthen the flowing property of ultrahigh molecular weight polyethylene(UHMWPE), not only improved blend processing characteristics, but also the container barrier property of producing after its modification is improved greatly.The nano-calcium carbonate that adds can be accelerated the crystallization time of blend, makes the crystal miniaturization, increases amount of crystals, thereby shortens the process period of goods.Adopt the forcing machine of screw slenderness ratio＞28, its objective is to guarantee evenly fully to mix at the mixing process Raw.
The plastic containers that the present invention makes have that the chemical resistance penetrating power is strong, the low-temperature impact-resistant performance is good, and the advantage such as container is less scaling; Below be high density polyethylene(HDPE), ultrahigh molecular weight polyethylene(UHMWPE), modified composite material three mechanical property correlation data:
As can be seen from the above table, the plastic containers that adopt the inventive method to make, it draws high the many indexs such as yield strength, shock strength, environmental stress crack resistance, anti-temperature limit of brittleness, wear rate, load deformation rate, heat-drawn wire and all is better than the container that high density polyethylene(HDPE) is made; Therefore but the container wall thickness attenuate about 20% made of the inventive method is saved material.
Embodiment:The invention will be further described below in conjunction with specific embodiment:
Embodiment 1
The forcing machine of sending into screw slenderness ratio＞28 behind 70 kilograms of high density polyethylene(HDPE)s, 25 kilograms of ultrahigh molecular weight polyethylene(UHMWPE)s, 2 kilograms of nano imvites, 3 kilograms of mixings of nano-calcium carbonate is carried out plastics processing, the mould blow molding; A temperature of boiling in water for a while, then dress with soy, vinegar, etc. that guarantees forcing machine is that 155 ℃, rate of extrusion are 100Kg/cm
2, die temperature is that 60 ℃, mold clamping pressure are 250N/m
2, the blow molding time is that 50S, blow gas pressure are 4.5Mpa.
Embodiment 2
Each step is with embodiment 1; Wherein, high density polyethylene(HDPE) is that 80 kilograms, ultrahigh molecular weight polyethylene(UHMWPE) are that 15 kilograms, nano imvite are that 3 kilograms, nano-calcium carbonate are 2 kilograms, and a temperature of boiling in water for a while, then dress with soy, vinegar, etc. of described forcing machine is 180 ℃, and die temperature is 50 ℃, and the blow molding time is 50S.
Embodiment 3
Each step is with embodiment 1; Wherein, high density polyethylene(HDPE) is that 75 kilograms, ultrahigh molecular weight polyethylene(UHMWPE) are that 20 kilograms, nano imvite are that 2 kilograms, nano-calcium carbonate are 3 kilograms, and a temperature of boiling in water for a while, then dress with soy, vinegar, etc. of described forcing machine is 170 ℃, and die temperature is that 55 ℃, blow molding time are 60S.
Claims (2)
1. one kind is carried out the method that modification prepares pressure vessels for the chemical industry to high density polyethylene(HDPE), comprises that raw material is sent into forcing machine carries out plastics processing, the mould blow molding; It is characterized in that: calculate by mass percentage, described raw material is mixed by high density polyethylene(HDPE) 70～80%, ultrahigh molecular weight polyethylene(UHMWPE) 15～25%, nano imvite 2～3%, nano-calcium carbonate 2～3%; Wherein, a temperature of boiling in water for a while, then dress with soy, vinegar, etc. of the screw slenderness ratio of described forcing machine＞28, forcing machine is that 155～180 ℃, rate of extrusion are 100Kg/cm
2, die temperature is that 50～60 ℃, mold clamping pressure are 250N/m
2, the blow molding time is that 50～70S, blow gas pressure are 4.5Mpa.
2. according to claim 1 high density polyethylene(HDPE) is carried out the method that modification prepares pressure vessels for the chemical industry, it is characterized in that: high density polyethylene(HDPE) is 75%, ultrahigh molecular weight polyethylene(UHMWPE) is 20%, nano imvite is 2%, nano-calcium carbonate is 3%; A temperature of boiling in water for a while, then dress with soy, vinegar, etc. of forcing machine is that 170 ℃, die temperature are that 55 ℃, blow molding time are 60S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104842724A CN102942730A (en) | 2012-11-26 | 2012-11-26 | Method for modifying high density polyethylene to prepare chemical container |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104842724A CN102942730A (en) | 2012-11-26 | 2012-11-26 | Method for modifying high density polyethylene to prepare chemical container |
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| CN102942730A true CN102942730A (en) | 2013-02-27 |
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| CN2012104842724A Pending CN102942730A (en) | 2012-11-26 | 2012-11-26 | Method for modifying high density polyethylene to prepare chemical container |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105459549A (en) * | 2015-12-29 | 2016-04-06 | 东莞市正新包装制品有限公司 | PE heat shrink film |
| CN109111622A (en) * | 2018-07-24 | 2019-01-01 | 上海樱花塑料制品有限公司 | A kind of high-performance collecting barrelling preparation method |
| CN115636995A (en) * | 2021-07-20 | 2023-01-24 | 中国石油天然气股份有限公司 | Polyethylene resin composition, modified high-density polyethylene composite material and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1145921A (en) * | 1995-09-20 | 1997-03-26 | 中国科学院化学研究所 | Isolation-type polyolefin multicomponent composite and preparation |
| CN102219951A (en) * | 2011-05-03 | 2011-10-19 | 江阴市润玛电子材料有限公司 | Material of container for depositing superhigh-purity reagent |
| CN102329444A (en) * | 2011-06-05 | 2012-01-25 | 王崇高 | Modified polyethylene resin |
-
2012
- 2012-11-26 CN CN2012104842724A patent/CN102942730A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1145921A (en) * | 1995-09-20 | 1997-03-26 | 中国科学院化学研究所 | Isolation-type polyolefin multicomponent composite and preparation |
| CN102219951A (en) * | 2011-05-03 | 2011-10-19 | 江阴市润玛电子材料有限公司 | Material of container for depositing superhigh-purity reagent |
| CN102329444A (en) * | 2011-06-05 | 2012-01-25 | 王崇高 | Modified polyethylene resin |
Non-Patent Citations (1)
| Title |
|---|
| 王立等: "蒙脱土及粉煤灰玻璃微珠对超高分子量聚乙烯/高密度聚乙烯复合材料流动性能的影响", 《塑料》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105459549A (en) * | 2015-12-29 | 2016-04-06 | 东莞市正新包装制品有限公司 | PE heat shrink film |
| CN105459549B (en) * | 2015-12-29 | 2018-05-04 | 东莞市正新包装制品有限公司 | A kind of PE heat shrink films |
| CN109111622A (en) * | 2018-07-24 | 2019-01-01 | 上海樱花塑料制品有限公司 | A kind of high-performance collecting barrelling preparation method |
| CN115636995A (en) * | 2021-07-20 | 2023-01-24 | 中国石油天然气股份有限公司 | Polyethylene resin composition, modified high-density polyethylene composite material and preparation method thereof |
| CN115636995B (en) * | 2021-07-20 | 2024-03-26 | 中国石油天然气股份有限公司 | Polyethylene resin composition, modified high-density polyethylene composite material and preparation method thereof |
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Application publication date: 20130227 |