CN103604228A - Plastic inner container and method for manufacturing same - Google Patents

Plastic inner container and method for manufacturing same Download PDF

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Publication number
CN103604228A
CN103604228A CN201310572354.9A CN201310572354A CN103604228A CN 103604228 A CN103604228 A CN 103604228A CN 201310572354 A CN201310572354 A CN 201310572354A CN 103604228 A CN103604228 A CN 103604228A
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China
Prior art keywords
inner container
plastic inner
die
staving
antioxidant
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CN201310572354.9A
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CN103604228B (en
Inventor
周建设
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WEISHI COUNTY YONGSHENG PLASTIC PRODUCTS Co Ltd
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WEISHI COUNTY YONGSHENG PLASTIC PRODUCTS Co Ltd
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Publication of CN103604228A publication Critical patent/CN103604228A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers

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Abstract

The invention discloses a plastic inner container which comprises a barrel and a cover. The lower end of the barrel is sealed, the cover is positioned at the upper end of the barrel, and netted support ribs are embedded in the barrel. The invention further provides a method for manufacturing the plastic inner container. The method includes steps of placing modified polypropylene materials in a thermal melting device and thermally melting the modified polypropylene materials for 4-9 hours at the temperature ranging from 160 DEG C to 190 DEG C; positioning the netted support ribs in a die inside a blow molding machine; guiding the thermally molten modified polypropylene materials into the die, blowing gas into the die to fill mixed materials in an integral die cavity and controlling the die for 5-15 minutes under the conditions that the temperature of the inside of the die ranges from 180 DEG C to 200 DEG C and the pressure of the inside of the die ranges from 3MPa to 4MPa; cooling the die until a product is shaped so as to obtain the plastic inner container. The plastic inner container and the method have the advantages that the plastic inner container is excellent in high-temperature-resistant performance and chemical stability; the size of the inner container is stable, and the inner container is low in deformation rate and shrinkage factor; the plastic inner container is excellent in ageing resistance and corrosion resistance and long in service life.

Description

A kind of plastic inner container and preparation method thereof
Technical field
The present invention relates to solar water heater field, relate in particular to a kind of plastic inner container for solar water heater and preparation method thereof.
Background technology
Inner bag is the critical component in solar water heater heat storage water tank, and its performance quality directly affects the service life of solar water heater product.Existing water heater liner mainly contains stainless steel inner container and enamel inner container.
Stainless steel inner container manufacturing process is more complicated, necessary through operation ability machine-shapings such as argon arc welding, end cap electric resistance weldings, and weld seam just becomes the weakness of stainless steel inner container.Because welding process need to be passed through high-temperature process, melt solder is also cooling in air, and commissure has experienced again a minor metal recrystallization, is just equivalent to stainless steel to carry out again a heat treatment, great changes will take place for the metal structure of weld seam and performance, therefore becomes the region that corrosion the most easily occurs.Meanwhile, because the stainless steel for the manufacture of inner bag is not thick, in the situation that adopting manual welding and electric resistance welding, there will be weldering situation, the most easily corrode in the place of crossing weldering, causes radiator leak.And its corrosion resistance is also poor, easily there is the phenomenons such as inner bag fouling, corrosion, greatly reduce the service life of inner bag.
Enamel inner container, by carry out enamel plating glaze at thickening surface of steel plate, can bear interior in a big way variations in temperature, is generally the range of temperature of-60~+ 450 ℃, can bear high temperature cataclysm.In physical characteristic, resistance to compression, anti-tensile, flexible, electric insulation, pollution-free; In chemical characteristic, acidproof, alkaline-resisting, high temperature resistant, water-fast steam, various ions all can not permeate its top layer, can effectively guarantee that water quality is not contaminated.But enamel inner container cost is high, processing technology requires high, easily produces bubble or pinprick in production process, and enamel fragility is larger simultaneously, and vibrations, collision easily produce the quick-fried phenomenon of squama.In addition, enamel can be gradually in hot water dissolves and peels off, and year for a long time come off can polluted water rust corrodes water clock for enamel, and above these factors, all can cause the general steel plate under enamel coating to expose, and form corrosion and leak.
Summary of the invention
For overcoming the deficiencies in the prior art, the object of the present invention is to provide that a kind of intensity is high, corrosion resistance and good, the plastic inner container of long service life and the preparation method of this inner bag.
According to an aspect of the present invention, provide a kind of plastic inner container, comprised the staving and the lid that is positioned at staving upper end of bottom sealing, described staving is embedded with mesh-supported muscle.
Alternatively, according to plastic inner container of the present invention, the material of described staving and described lid is polypropylene modified material, and described brace rod is steel wire.
Alternatively, according to plastic inner container of the present invention, on described lid, be provided with locating ring, on described locating ring, be provided with a plurality of holes.
Alternatively, according to plastic inner container of the present invention, the thickness of described plastic inner container is 1-2mm.
Alternatively, according to plastic inner container of the present invention, the bottom of described staving is provided with support column.
According to a further aspect in the invention, provide a kind of method of preparing plastic inner container, comprised the steps:
Polypropylene modified material is placed in to thermofusion device, hot melt 4-9 hour at 160-190 ℃;
Mesh-supported muscle is placed in to blow moulding machine inner mould locates;
Polypropylene modified material after hot melt is imported in mould and then in mould, blown, make mixed material be full of whole die cavity, the temperature in mould is 180-200 ℃, and pressure is 3-4MPa, controls 5-15 minute;
Be cooled to product approval, obtain plastic inner container.
Alternatively, preparation in accordance with the present invention, be 3-8 minute described cool time.
Alternatively, preparation in accordance with the present invention, the component that described polypropylene modified material comprises following weight portion: polypropylene 60-70 part, filler 10-15 part, antioxidant 1-2 part, flexibilizer 10-15 part; Wherein, described filler glass fibre, described antioxidant is antioxidant 1010 or antioxidant 1076, described flexibilizer is maleic anhydride graft POE, maleic anhydride graft SBS or maleic anhydride grafted ABS.
Alternatively, preparation in accordance with the present invention, described polypropylene modified material further comprises the weather resisting agent of 0.5-1 weight portion.
Alternatively, preparation in accordance with the present invention, described weather resisting agent is dilauryl thiodipropionate.
Plastic inner container of the present invention has excellent resistance to elevated temperatures, can, 100 ℃ of above long-term uses, have good chemical stability; Inner bag dimensionally stable, deformation rate and shrinkage factor are little; And have excellent ageing-resistant performance and decay resistance, service life is longer.The method of preparing this plastic inner container adopts blow molding process disposal molding, produces that the plastic inner container obtaining is seamless, no-welding-spot, and leakproof, good airproof performance can effectively be avoided the defect of stainless steel inner container and enamel inner container.
Accompanying drawing explanation
By reading below detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing is only for the object of preferred embodiment is shown, and do not think limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of plastic inner container of the present invention;
Fig. 2 is the structural representation of staving; And
Fig. 3 is plastic inner container preparation method's of the present invention flow chart.
The specific embodiment
Below in conjunction with accompanying drawing and concrete embodiment, the invention will be further described.
According to an aspect of the present invention, provide a kind of plastic inner container can be used in solar water heater, comprised the staving and the lid that is positioned at staving upper end of bottom sealing, described staving is embedded with mesh-supported muscle.
Fig. 1 shows the structural representation of plastic inner container of the present invention and the structural representation of staving.As depicted in figs. 1 and 2, described plastic inner container comprises the staving 1 and the lid 2 that is positioned at staving 1 upper end of bottom sealing, and the thickness of described plastic inner container is traditionally arranged to be 1-2mm.At described staving 1, be embedded with mesh-supported muscle 3.Described mesh-supported muscle 3 is arranged to cylindrical, and the diameter of this cylinder is between the internal diameter and external diameter of described staving 1, so that described brace rod can embed in described staving.Inner bag of the present invention is made of plastics, and thermoplasticity is good, indeformable while being heated, and by the embedded mesh-supported muscle of plastic inner container, the intensity of inner bag is strengthened greatly, has extended the service life of inner bag.
Preferably, the material of described staving 1 and described lid 2 is polypropylene modified material, and described brace rod 3 is steel wire.Polypropylene is the thermoplastic resin being polymerized by propylene monomer, has the outstanding features such as good impact resistance, chemical proofing, the transparency, thermal insulation, electrical insulating property and processability.But because polypropylene is non-polar polymer, dyeability, cementability, antistatic behaviour, hydrophily and poor with the compatibility of other polar polymers and inorganic filler, the cryogenic property of homopolymers and ageing-resistant performance are also poor, and molding shrinkage is large, thereby limited polyacrylic further Application and Development.By chemical method, change polyacrylic molecular structure as copolymerization, grafting, chlorination, chlorosulfonation or crosslinked etc., or adopt physical method as blend, enhancing, fill, add additive and improve Properties of Polypropylene or give polypropylene with new performance, to expand its range of application.The present invention adopts the polypropylene of modification, makes the high temperature resistant croop property of plastic inner container made by it better, and load deformation temperature is high, and has heat preservation and insulation, has increased substantially the heat insulation effect of inner bag, long service life.Be understandable that, described staving 1 and lid 2 also can be by making such as polyethylene, polypropylene or Other Engineering plastics, and described mesh-supported muscle also can be made by other metals such as iron, copper.
In plastic inner container of the present invention, on described lid 2, be provided with locating ring 4, on described locating ring 4, be provided with a plurality of holes 5, be used for connecting assisted heating device, plastic inner container can be firmly fixed in water heater.In the bottom of described staving 1, be provided with support column 6.
The present invention also provides the preparation method of above-mentioned plastic inner container, and Fig. 3 shows the preparation method's of plastic inner container of the present invention flow chart.As shown in Figure 3, first this preparation method comprises the steps:, starts step S1100, polypropylene modified material is placed in to thermofusion device and melts, and hot melting temperature is 160-190 ℃, and hot molten time is 4-9 hour; Carry out afterwards step S1200, mesh-supported muscle is placed in to blow moulding machine inner mould and locates; Then enter step S1300, carry out blow molding,, the polypropylene modified material that is melted into liquid condition is imported in mould and then in mould, blown, make material be full of whole die cavity, in this operating process, the temperature in mould remains 180-200 ℃, pressure is 3-4MPa, and the blowing time is controlled 5-15 minute; Finally carry out S1400 step, the inner bag of blow molding is cooled to product approval, obtain plastic inner container; Preferably, be 3-8 minute described cool time.This preparation method adopts blow molding process disposal molding, produces that the plastic inner container obtain is seamless, no-welding-spot, and leakproof, good airproof performance can effectively be avoided the defect of stainless steel inner container and enamel inner container.
In preparation method of the present invention, described polypropylene modified material can be occurred in prior art material modified.In one embodiment of the present of invention, the component that described polypropylene modified material comprises following weight portion: polypropylene 60-70 part, filler 10-15 part, antioxidant 1-2 part, flexibilizer 10-15 part.In above-mentioned raw materials, the filler using is glass fibre, and the antioxidant of employing is antioxidant 1010 or antioxidant 1076, and the flexibilizer of use is maleic anhydride graft POE, maleic anhydride graft SBS or maleic anhydride grafted ABS.
Glass fibre is a kind of Inorganic Non-metallic Materials of excellence, and good insulating, heat resistance is strong, corrosion resistance good, and mechanical strength is high, can be used as reinforcing material, is used for manufacturing reinforced plastics or strengthens rubber.Antioxidant 1010 or antioxidant 1076 are common antioxidant, apply morely in acrylic resin, are the auxiliary agents that heat endurance is high, be very suitable for using under hot conditions, can extend the service life of goods.The thermoplastic elastomer (TPE) of maleic anhydride graft POE(ethene and octene in-situ polymerization), maleic anhydride graft SBS(styrene butadiene thermoplasticelastomer) or maleic anhydride grafted ABS (acrylonitrile-butadiene-styrene copolymer) be for the plastics significant flexibilizer of effect on engineering plastics particularly, add flexibilizer can reduce the fragility after polypropylene plastics sclerosis, improve its impact strength and percentage elongation.By adding above-mentioned three kinds of property-modifying additives, can make the strength of PP after modification be improved, there is excellent non-oxidizability and impact resistance simultaneously.
Except above-mentioned three kinds of property-modifying additives, in described polypropylene modified material, further include the weather resisting agent of 0.5-1 weight portion.In one embodiment of the present of invention, described weather resisting agent is dilauryl thiodipropionate.Dilauryl thiodipropionate has the effect of decompose hydroperoxide, can be used as the auxiliary antioxidant of polyethylene, polypropylene, ABS resin, polyvinyl chloride etc., and have do not pollute, Undec feature during not painted, high temperature process, use it for polypropylene modification, can guarantee that the plastic inner container aging speed making slows down, and improves its service life.
By above-mentioned preparation method material used, be environment-friendly materials, nontoxic, be peculiar smell, according to the safety evaluatio standard of GB/T17219-1998(Drinking Water transmission & distribution wetting system and protective materials) standard-required, the plastic inner container making has been carried out to wholesomeness detection, testing result shows, the item index such as look, turbidity, smelly and taste, naked eyes visible, pH, total dissolved solid, oxygen demand, arsenic, cadmium, lead, chromium (sexavalence), mercury, chloroform, volatile phenol all meets the hygienic requirements of above-mentioned standard to drinking water transmission & distribution wetting system.
Meanwhile, the plastic inner container making has been carried out to hot air aging experiment, low temperature resistant experiment and color resistance experiment, specific experiment result is as shown in table 1 below.
Table 1
By table 1 result, can be found out, described plastic inner container has excellent resistance to elevated temperatures, can, 100 ℃ of above long-term uses, have good chemical stability; Inner bag dimensionally stable, deformation rate and shrinkage factor are little; And have excellent ageing-resistant performance, service life is longer.
It should be noted, the present invention will be described rather than limit the invention for above-described embodiment, and those skilled in the art can design alternative embodiment in the situation that do not depart from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and is not listed as element or operation in the claims.The use of word first, second and C grade does not represent any order.Can be title by these word explanations.

Claims (10)

1. a plastic inner container, is characterized in that: comprise the staving (1) of bottom sealing and be positioned at the lid (2) of staving (1) upper end, described staving (1) is embedded with mesh-supported muscle (3).
2. plastic inner container according to claim 1, is characterized in that: the material of described staving (1) and described lid (2) is polypropylene modified material, and described brace rod (3) is steel wire.
3. plastic inner container according to claim 1 and 2, is characterized in that: on described lid (2), be provided with locating ring (4), be provided with a plurality of holes (5) on described locating ring (4).
4. plastic inner container according to claim 1, is characterized in that: the thickness of described plastic inner container is 1-2mm.
5. plastic inner container according to claim 1, is characterized in that: the bottom of described staving (1) is provided with support column (6).
6. a method of preparing plastic inner container, comprises the steps:
Polypropylene modified material is placed in to thermofusion device, hot melt 4-9 hour at 160-190 ℃;
Mesh-supported muscle is placed in to blow moulding machine inner mould locates;
Polypropylene modified material after hot melt is imported in mould and then in mould, blown, make material be full of whole die cavity, the temperature in mould is 180-200 ℃, and pressure is 3-4MPa, controls 5-15 minute;
Be cooled to product approval, obtain plastic inner container.
7. preparation method according to claim 6, is characterized in that: be 3-8 minute described cool time.
8. preparation method according to claim 6, is characterized in that: the component that described polypropylene modified material comprises following weight portion: polypropylene 60-70 part, filler 10-15 part, antioxidant 1-2 part, flexibilizer 10-15 part;
Wherein, described filler is glass fibre, and described antioxidant is antioxidant 1010 or antioxidant 1076, and described flexibilizer is maleic anhydride graft POE, maleic anhydride graft SBS or maleic anhydride grafted ABS.
9. preparation method according to claim 8, is characterized in that: described polypropylene modified material further comprises the weather resisting agent of 0.5-1 weight portion.
10. preparation method according to claim 9, is characterized in that: described weather resisting agent is dilauryl thiodipropionate.
CN201310572354.9A 2013-11-15 2013-11-15 A kind of plastic inner container and preparation method thereof Expired - Fee Related CN103604228B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110662379A (en) * 2018-06-28 2020-01-07 华为机器有限公司 Shell of terminal
CN113733459A (en) * 2021-09-08 2021-12-03 亚普汽车部件股份有限公司 Method for forming plastic liner of high-pressure composite container

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1288139A (en) * 1999-09-11 2001-03-21 郭伟 Solar energy vacuum tube water heater water tank, its processing technology and material used
CN1995856A (en) * 2006-12-30 2007-07-11 武汉大学 Plastic water heater lining and method for manufacturing same
WO2008095876A1 (en) * 2007-02-06 2008-08-14 Sferasol S.R.L. Improved spherical solar collector
CN201672731U (en) * 2010-05-14 2010-12-15 张国良 Inner container of solar water heater
CN102898723A (en) * 2011-07-28 2013-01-30 合肥杰事杰新材料股份有限公司 Polypropylene composition and preparation method thereof
CN103256733A (en) * 2013-04-15 2013-08-21 青岛百旺电器有限公司 Pressure-bearing type plastic liner, production method and solar water heater using liner
CN203837304U (en) * 2013-11-15 2014-09-17 尉氏县永胜塑料制品有限公司 Plastic inner container

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1288139A (en) * 1999-09-11 2001-03-21 郭伟 Solar energy vacuum tube water heater water tank, its processing technology and material used
CN1995856A (en) * 2006-12-30 2007-07-11 武汉大学 Plastic water heater lining and method for manufacturing same
WO2008095876A1 (en) * 2007-02-06 2008-08-14 Sferasol S.R.L. Improved spherical solar collector
CN201672731U (en) * 2010-05-14 2010-12-15 张国良 Inner container of solar water heater
CN102898723A (en) * 2011-07-28 2013-01-30 合肥杰事杰新材料股份有限公司 Polypropylene composition and preparation method thereof
CN103256733A (en) * 2013-04-15 2013-08-21 青岛百旺电器有限公司 Pressure-bearing type plastic liner, production method and solar water heater using liner
CN203837304U (en) * 2013-11-15 2014-09-17 尉氏县永胜塑料制品有限公司 Plastic inner container

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110662379A (en) * 2018-06-28 2020-01-07 华为机器有限公司 Shell of terminal
CN113733459A (en) * 2021-09-08 2021-12-03 亚普汽车部件股份有限公司 Method for forming plastic liner of high-pressure composite container

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