CN102604217A - High-strength plastic corner protector for steel oil packaging and preparation method thereof - Google Patents
High-strength plastic corner protector for steel oil packaging and preparation method thereof Download PDFInfo
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- CN102604217A CN102604217A CN2012100599856A CN201210059985A CN102604217A CN 102604217 A CN102604217 A CN 102604217A CN 2012100599856 A CN2012100599856 A CN 2012100599856A CN 201210059985 A CN201210059985 A CN 201210059985A CN 102604217 A CN102604217 A CN 102604217A
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- side panel
- density polyethylene
- corner protector
- end plates
- highstrenghtpiston
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- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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- Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
Abstract
The invention belongs to the field of plastic packaging, and particularly relates to a high-strength plastic corner protector for steel oil packaging and a preparation method thereof. The high-strength plastic corner protector for steel oil packaging is characterized by comprising a side panel bent into a cylindrical shape and an end panel bent into a ring shape, wherein the edge of one end of the cylindrical side panel is connected with a ring edge of the ring-shaped end panel. The high-strength plastic corner protector for steel oil packaging is prepared from the following components in parts by mass: 65-85 parts of polypropylene, 6-15 parts of linear low-density polyethylene, 6-15 parts of low-density polyethylene, 8-12 parts of high-density polyethylene, 3-8 parts of styrene butadiene rubber, 10-15 parts of glass fiber, 0.1-0.5 part of antioxidant 1010 and 0.1-0.5 part of antioxidant 1076. The tensile strength of the high-strength plastic corner protector for steel oil packaging is greater than 20MPa, the impact strength is greater than 28KJ/m<2>, the processing fluidity is good, and high stress cracking resistance and low-temperature resistance are realized.
Description
Technical field
The present invention relates to steel coil package, particularly packaging steel coils highstrenghtpiston corner protector and preparation method thereof.
Background technology
Steel roll package is that coil of strip stores, the important sfgd. of transportation.In the coil of strip transportation; The two ends outward flange of coil of strip is clashed into easily and is destroyed; High-quality steel coil of strips such as particularly metallurgical cold-reduced sheet, galvanized sheet, dry plate, colour coated plate, silicon steel sheet, in a single day the coil of strip two ends are clashed into, and are easy to the quality of the whole coil plate of influence.
Existing coil of strip protective packaging mainly is divided into circumferential backplate, end plates and corner protector, and wrapping material mainly are divided into Wooden package, mental package and plastic wrapping.Wooden package wherein adopts galvanized sheet iron more, and shock-absorbing capacity is poor during bump, causes damaging of surface of steel plate and steel plate end face easily; The easy corrosion of irony packing material, the course of processing is complicated, and cost is high, is replaced by plastic packing article just gradually; Plastic wrapping is inexpensive with its light weight, be convenient to pack and the effect of waterproof damp proof insulation, and moulding process is simple, obtains increasing application.In these three kinds of packing elements, circumferentially backplate just plays package action with end plates to coil of strip, to prevent coil of strip by the erosion of wet gas and water, can prevent also that simultaneously the coil of strip surface is by the scuffing of rigidity object or wound; And corner protector has the defencive function except that the folding corner region to coil of strip; Also need bear strapping tape to its powerful reactive force that applies, particularly when handling, the weight of coil of strip acts on the corner protector through wireline; So corner protector should have high-intensity rigidity could guarantee its packing effect.Therefore, how to design have machinery and good processability, low temperature resistant, the task of top priority that packaging steel coils Plastic protective corner that stress crack resistance performance is good has become the steel roll package industry.
Summary of the invention
The object of the invention is exactly for the defective that overcomes above-mentioned prior art existence packaging steel coils highstrenghtpiston corner protector and preparation method thereof to be provided.
The technical scheme that the present invention solves the problems of the technologies described above employing is:
Packaging steel coils highstrenghtpiston corner protector; It comprises that one curves the end plates that columnar side panel and curves annular; An annulus edge of the edge of one end of cylindrical side plate and annular end plates is connected; Formed by Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR), spun glass, antioxidant 1010, inhibitor 1076 feedstock production, the shared mass fraction of each raw material is:
Vestolen PP 7052 65～85,
Linear low density polyethylene 6～15,
New LDPE (film grade) 6～15,
High density polyethylene(HDPE) 8～12,
Styrene-butadiene rubber(SBR) 3～8,
Spun glass 10～15,
Antioxidant 1010 (four [3-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] quaternary amyl alcohol ester) 0.1～0.5,
Inhibitor 1076 (in β (3, the 5-di-tert-butyl-hydroxy phenyl) the propionic acid stearyl alcohol ester a kind of) 0.1～0.5.
Press such scheme, described raw material also comprises:
Coupling agent 0.5～0.7,
Nucleator 0.5～1,
Calcium/zinc stabilizer 1～2,
Press such scheme, described Vestolen PP 7052 is PPK8303, tensile yield strength >=22.0Mpa, elongation at break＞200%, melt flow rate(MFR) 1.0-3.0g/10min; Described linear low density polyethylene is LLDPE7042, tensile yield strength >=8.3Mpa, elongation at break＞500%, melt flow rate(MFR) 1.7-2.3g/10min; Described new LDPE (film grade) is LDPE2426H, tensile yield strength >=10.0Mpa, elongation at break＞200%, melt flow rate(MFR) 1.7-2.2g/10min; Described high density polyethylene(HDPE) is HDPE5000S, tensile yield strength >=24.0Mpa, elongation at break＞500%, melt flow rate(MFR) 0.8-1.1g/10min; Described styrene-butadiene rubber(SBR) is SBS1301 (YH-791), and S/B (block ratio) is 30/70, tensile strength >=15.0Mpa, tensile yield＞750%, melt flow rate(MFR) 0.5-5.0g/10min.
Press such scheme, described nucleator is Sodium Benzoate, phenylformic acid cadmium, bismuth salicylate or titanous oxalate; Described bright lubricant is anti-glass emergence on the surface agent TAF; Described coupling agent is silane coupling agent, titanate coupling agent or aluminate coupling agent.
Press such scheme, the edge of said side panel one end is connected with the outer toroid edge of annular end plates, and the cylinder outer side wall of side panel is provided with the annular stiffening web, and the end face of end plates is provided with the annular stiffening web; The junction of said side panel and end plates is provided with a plurality of " L " shape brace rod, and two arms of said brace rod are separately positioned on the end face of end plates on the cylinder outer side wall with side panel; Brace rod is evenly distributed on side panel and the end plates.
Press such scheme, hoop is laid with water vent on the said end plates, and hoop is laid with the steel band groove on the said side panel.
Press such scheme, the interior annulus edge of the edge of an end of said side panel and annular end plates is connected, and the cylinder inner side-wall of side panel is provided with the annular stiffening web, and the end face of end plates is provided with the annular stiffening web; The junction of said side panel and end plates is provided with a plurality of " L " shape brace rod, and two arms of said brace rod are separately positioned on the end face of end plates on the cylinder inner side-wall with side panel; Brace rod is evenly distributed on side panel and the end plates.
Press such scheme, have the fixed orifices that a row arranges along the side panel direction on the end of said side panel one end, the other end of side panel is provided with the fastener that is used to pin fixed orifices.
The preparation method of packaging steel coils highstrenghtpiston corner protector is characterized in that, it comprises following process step:
1) by each raw materials in part by weight be:
Vestolen PP 7052 65～85,
Linear low density polyethylene 6～15,
New LDPE (film grade) 6～15,
High density polyethylene(HDPE) 8～12,
Styrene-butadiene rubber(SBR) 3～8,
Spun glass 10～15,
Antioxidant 1010 0.1～0.5,
Inhibitor 1,076 0.1～0.5,
It is subsequent use to choose Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR), spun glass, antioxidant 1010, inhibitor 1076;
2) Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR) are dropped in the high-speed mixer, drop into antioxidant 1010 and inhibitor 1076 again; Even 80～100 ℃ of high-speed stirring to raw materials mix, obtain compound;
3) compound is added in the feeding trough of twin screw extruder; The charging opening of spun glass in downstream adopts follow-up feed way extruding pelletization; The screw zones temperature of said twin screw extruder is following: 140～170 ℃ of feeding sections; 160～180 ℃ of transportation sections, 170～200 ℃ of melt zones, 200～210 ℃ of heads;
4) drying; After the injection moulding machine injection moulding, injection temperature is following: 160～180 ℃ of feeding sections, and 180～200 ℃ of transportation sections, 200～220 ℃ of melt zones, 210～230 ℃ of nozzles obtain packaging steel coils highstrenghtpiston corner protector.
Press such scheme, 60～80 ℃ of described drying temperatures, 0.5～1 hour time of drying.
Compared with prior art, existing corner protector product strength is poor, not low temperature resistant, can only be used for internal packing, and packaging steel coils highstrenghtpiston corner protector tensile strength provided by the invention is greater than 20MPa, and shock strength is greater than 28KJ/m
2, processing flowability is good, and goods have good stress crack resistance performance and resistance to low temperature, so it not only can be used for internal packing, also can be used for externally packaging steel coil.
Description of drawings
Fig. 1 is the side-view of the outer corner protector of the present invention.
Fig. 2 is the vertical view of the outer corner protector of the present invention.
Fig. 3 is the side-view of inner protective corner of the present invention.
Fig. 4 is the vertical view of inner protective corner of the present invention.
Among the figure: 1-side panel, 2-end plates, 3-stiffening web, 4-brace rod, 5-water vent, 6-steel band groove, 7-fixed orifices, 8-fastener.
Embodiment
For a better understanding of the present invention, further illustrate content of the present invention, also can prepare inner protective corner but content of the present invention both can be used for preparing outer corner protector, and not only be confined to following embodiment below in conjunction with embodiment.
Embodiment 1:
The outer corner protector of packaging steel coils highstrenghtpiston; Comprise that one curves the end plates (2) that columnar side panel (1) and curves annular; The edge of said side panel one end is connected with the outer toroid edge of annular end plates, and the cylinder outer side wall of side panel and the end face of end plates are provided with annular stiffening web (3); The junction of said side panel and end plates is provided with a plurality of " L " shape brace rod (4), and two arms of said brace rod are separately positioned on the end face of end plates on the cylinder outer side wall with side panel; Brace rod is evenly distributed on side panel and the end plates, and hoop is laid with water vent (5) on the said end plates, and hoop is laid with steel band groove (6) on the said side panel, is convenient to packing; The outer corner protector of described packaging steel coils highstrenghtpiston is formed by Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR), spun glass, antioxidant 1010, inhibitor 1076, coupling agent, phenylformic acid cadmium, calcium/zinc stabilizer, bright lubricant feedstock production, and concrete preparation method is:
1) each raw material is chosen raw material by following parts by weight, subsequent use:
Vestolen PP 7052 65,
Linear low density polyethylene 15,
New LDPE (film grade) 15,
High density polyethylene(HDPE) 10,
Styrene-butadiene rubber(SBR) 6,
Spun glass 11.1,
Antioxidant 1010 0.3,
Inhibitor 1,076 0.2,
Tetrabutyl titanate coupling agent 0.5,
Phenylformic acid cadmium 0.5,
Calcium/zinc stabilizer 1,
Anti-glass emergence on the surface agent TAF 2;
2) Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR) are dropped in the high-speed mixer, drop into antioxidant 1010 and inhibitor 1076, tetrabutyl titanate coupling agent, phenylformic acid cadmium, calcium/zinc stabilizer, anti-glass emergence on the surface agent TAF again; Even 80-100 ℃ of high-speed stirring to raw materials mix, obtain compound;
3) compound is emitted in the feeding trough that is added to twin screw extruder; The charging opening of spun glass in downstream adopts follow-up feed way extruding pelletization, and the screw zones temperature is following: 160～170 ℃ of feeding sections, 160～180 ℃ of transportation sections; 170～200 ℃ of melt zones, 200～210 ℃ of heads;
4) drying, 60～80 ℃ of drying temperatures, 0.5～1 hour time of drying;
5) injection moulding machine injection moulding, injection temperature is following: 160～180 ℃ of feeding sections, 180～200 ℃ of transportation sections, 200～220 ℃ of melt zones, 210～230 ℃ of nozzles obtain the outer corner protector of packaging steel coils highstrenghtpiston.
Its Performance Detection test-results is seen table 1, with the outer corner protector-10 ℃ cooling of above-mentioned packaging steel coils highstrenghtpiston, do not have breach through impulse detection then and produce in addition, and the mensuration tensile strength is 19.2Mpa.
Packaging steel coils highstrenghtpiston inner protective corner; Comprise that one curves the end plates (2) that columnar side panel (1) and curves annular; The interior annulus edge of the edge of one end of said side panel and annular end plates is connected, and the end face with end plates on the cylinder inner side-wall of side panel is provided with annular stiffening web (3); The junction of said side panel and end plates is provided with a plurality of " L " shape brace rod (4), and two arms of said brace rod are separately positioned on the end face of end plates on the cylinder inner side-wall with side panel; Brace rod is evenly distributed on side panel and the end plates; Have the fixed orifices (7) that a row arranges along the side panel direction on the end of said side panel one end; The other end of side panel is provided with the fastener (8) that is used to pin fixed orifices; Described packaging steel coils highstrenghtpiston inner protective corner is formed by Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR), spun glass, antioxidant 1010, inhibitor 1076 feedstock production, and concrete preparation method is:
1) each raw material is chosen raw material by following parts by weight, subsequent use:
Vestolen PP 7052 70,
Linear low density polyethylene 12,
New LDPE (film grade) 12,
High density polyethylene(HDPE) 12,
Styrene-butadiene rubber(SBR) 3.2,
Spun glass 15,
Antioxidant 1010 0.1,
Inhibitor 1,076 0.4;
2) Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR) are dropped in the high-speed mixer, drop into antioxidant 1010 and inhibitor 1076 again; Even 80-100 ℃ of high-speed stirring to raw materials mix, obtain compound;
3) compound is emitted in the feeding trough that is added to twin screw extruder; The charging opening of spun glass in downstream adopts follow-up feed way extruding pelletization, and the screw zones temperature is following: 160～170 ℃ of feeding sections, 160～180 ℃ of transportation sections; 170～200 ℃ of melt zones, 200～210 ℃ of heads;
4) drying, 60～80 ℃ of drying temperatures, 0.5～1 hour time of drying;
5) injection moulding machine injection moulding, injection temperature is following: 160～180 ℃ of feeding sections, 180～200 ℃ of transportation sections, 200～220 ℃ of melt zones, 210～230 ℃ of nozzles obtain packaging steel coils highstrenghtpiston inner protective corner.
Its Performance Detection test-results is seen table 1.
Packaging steel coils highstrenghtpiston inner protective corner; Comprise that one curves the end plates (2) that columnar side panel (1) and curves annular; The interior annulus edge of the edge of one end of said side panel and annular end plates is connected, and the end face with end plates on the cylinder inner side-wall of side panel is provided with annular stiffening web (3); The junction of said side panel and end plates is provided with a plurality of " L " shape brace rod (4), and two arms of said brace rod are separately positioned on the end face of end plates on the cylinder inner side-wall with side panel; Brace rod is evenly distributed on side panel and the end plates, has the fixed orifices (7) that a row arranges along the side panel direction on the end of said side panel one end, and the other end of side panel is provided with the fastener (8) that is used to pin fixed orifices; Described packaging steel coils highstrenghtpiston inner protective corner is formed by Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR), spun glass, antioxidant 1010, inhibitor 1076 feedstock production, and concrete preparation method is:
1) each raw material is chosen raw material by following parts by weight, subsequent use:
Vestolen PP 7052 75,
Linear low density polyethylene 9,
New LDPE (film grade) 9,
High density polyethylene(HDPE) 8.5,
Styrene-butadiene rubber(SBR) 4,
Spun glass 10.6,
Antioxidant 1010 0.3,
Inhibitor 1,076 0.2;
2) Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR) are dropped in the high-speed mixer, drop into antioxidant 1010 and inhibitor 1076 again; Even 80-100 ℃ of high-speed stirring to raw materials mix, obtain compound;
3) compound is emitted in the feeding trough that is added to twin screw extruder; The charging opening of spun glass in downstream adopts follow-up feed way extruding pelletization, and the screw zones temperature is following: 160～170 ℃ of feeding sections, 160～180 ℃ of transportation sections; 170～200 ℃ of melt zones, 200～210 ℃ of heads;
4) drying, 60～80 ℃ of drying temperatures, 0.5～1 hour time of drying;
5) injection moulding machine injection moulding, injection temperature is following: 160～180 ℃ of feeding sections, 180～200 ℃ of transportation sections, 200～220 ℃ of melt zones, 210～230 ℃ of nozzles obtain packaging steel coils highstrenghtpiston inner protective corner.
Its Performance Detection test-results is seen table 1.
Packaging steel coils highstrenghtpiston inner protective corner; Comprise that one curves the end plates (2) that columnar side panel (1) and curves annular; The interior annulus edge of the edge of one end of said side panel and annular end plates is connected, and the end face with end plates on the cylinder inner side-wall of side panel is provided with annular stiffening web (3); The junction of said side panel and end plates is provided with a plurality of " L " shape brace rod (4), and two arms of said brace rod are separately positioned on the end face of end plates on the cylinder inner side-wall with side panel; Brace rod is evenly distributed on side panel and the end plates, has the fixed orifices (7) that a row arranges along the side panel direction on the end of said side panel one end, and the other end of side panel is provided with the fastener (8) that is used to pin fixed orifices; Described packaging steel coils highstrenghtpiston inner protective corner is formed by Vestolen PP 7052 PPK8303, linear low density polyethylene LLDPE7042, low density polyethylene 2426H, high density polyethylene 5000S, styrene-butadiene rubber(SBR) SBS1301 (YH-791), spun glass, antioxidant 1010, inhibitor 1076, coupling agent, Sodium Benzoate, calcium/zinc stabilizer, anti-glass emergence on the surface agent TAF feedstock production, and concrete preparation method is:
1) each raw material is chosen raw material by following parts by weight, subsequent use:
Vestolen PP 7052 PPK8303 80,
Linear low density polyethylene LLDPE7042 8,
Low density polyethylene 2426H 8,
High density polyethylene 5000S 9.6,
Styrene-butadiene rubber(SBR) SBS1301 3.2,
Spun glass 10.9,
Antioxidant 1010 0.1,
Inhibitor 1,076 0.4;
Sec.-propyl three (dioctylphyrophosphoric acid acyloxy) titanate coupling agent 0.6,
Sodium Benzoate 0.7,
Calcium/zinc stabilizer 1.5,
Anti-glass emergence on the surface agent TAF 2.5,
Described anti-glass emergence on the surface agent TAF purchases the refined chemical industry ltd in the source, Guangzhou;
Described Vestolen PP 7052 PPK8303 purchases in SINOPEC Beijing Yanshan Company;
Described linear low density polyethylene LLDPE7042 purchases the Jilin Petrochemical company in CNPC;
Low density polyethylene 2426H purchases the Lanzhou Petrochemical Company in CNPC;
Described high density polyethylene 5000S purchases the Lanzhou Petrochemical Company in CNPC;
Described styrene-butadiene rubber(SBR) SBS1301 (YH-791) purchases in Balin Branch Corp. SINOPEC;
2) Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR) are dropped in the high-speed mixer, drop into antioxidant 1010, inhibitor 1076, coupling agent, Sodium Benzoate, calcium/zinc stabilizer, anti-glass emergence on the surface agent TAF again; Even 80-100 ℃ of high-speed stirring to raw materials mix, obtain compound;
3) compound is emitted in the feeding trough that is added to twin screw extruder; The charging opening of spun glass in downstream adopts follow-up feed way extruding pelletization, and the screw zones temperature is following: 160～170 ℃ of feeding sections, 160～180 ℃ of transportation sections; 170～200 ℃ of melt zones, 200～210 ℃ of heads;
4) drying, 60～80 ℃ of drying temperatures, 0.5～1 hour time of drying;
5) injection moulding machine injection moulding, injection temperature is following: 160～180 ℃ of feeding sections, 180～200 ℃ of transportation sections, 200～220 ℃ of melt zones, 210～230 ℃ of nozzles obtain packaging steel coils highstrenghtpiston inner protective corner.
Its Performance Detection test-results is seen table 1.
The outer corner protector of packaging steel coils highstrenghtpiston; Comprise that one curves the end plates (2) that columnar side panel (1) and curves annular; The edge of said side panel one end is connected with the outer toroid edge of annular end plates, and the cylinder outer side wall of side panel and the end face of end plates are provided with annular stiffening web (3); The junction of said side panel and end plates is provided with a plurality of " L " shape brace rod (4), and two arms of said brace rod are separately positioned on the end face of end plates on the cylinder outer side wall with side panel; Brace rod is evenly distributed on side panel and the end plates, circumferentially is laid with water vent (5) on the said end plates, has steel band groove (6) on the said side panel; The outer corner protector of described packaging steel coils highstrenghtpiston is formed by Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR), spun glass, antioxidant 1010, inhibitor 1076, coupling agent, Sodium Benzoate, calcium/zinc stabilizer, anti-glass emergence on the surface agent TAF feedstock production, and concrete preparation method is:
1) each raw material is chosen raw material by following parts by weight, subsequent use:
Vestolen PP 7052 85,
Linear low density polyethylene 6.8,
New LDPE (film grade) 6.8,
High density polyethylene(HDPE) 8.5,
Styrene-butadiene rubber(SBR) 4,
Spun glass 11.2,
Antioxidant 1010 0.3,
Inhibitor 1,076 0.2;
Aluminate coupling agent 0.7,
Calcium/zinc stabilizer 2,
Anti-glass emergence on the surface agent TAF 3,
2) Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR) are dropped in the high-speed mixer; Drop into antioxidant 1010, inhibitor 1076, aluminate coupling agent, Sodium Benzoate, calcium/zinc stabilizer, anti-glass emergence on the surface agent TAF again; Even 80-100 ℃ of high-speed stirring to raw materials mix, obtain compound;
3) compound is emitted in the feeding trough that is added to twin screw extruder; The charging opening of spun glass in downstream adopts follow-up feed way extruding pelletization, and the screw zones temperature is following: 160～170 ℃ of feeding sections, 160～180 ℃ of transportation sections; 170～200 ℃ of melt zones, 200～210 ℃ of heads;
4) drying, 60～80 ℃ of drying temperatures, 0.5～1 hour time of drying;
5) injection moulding machine injection moulding, injection temperature is following: 160～180 ℃ of feeding sections, 180～200 ℃ of transportation sections, 200～220 ℃ of melt zones, 210～230 ℃ of nozzles obtain the outer corner protector of packaging steel coils highstrenghtpiston.
Its Performance Detection test-results is seen table 1.
Table 1 embodiment 1-5 performance
| | Embodiment | 1 | |
|
|
|
| Shock strength/(KJ/m 2) | 29.1 | 28.7 | 28.4 | 30.1 | 29.0 | |
| Tensile strength/Mpa | 21.8 | 20.4 | 20.9 | 23.3 | 22.3 | |
| Elongation at break/% | 420 | 392 | 394 | 422 | 412 | |
| Flexural strength/Mpa | 19.4 | 18.7 | 18.6 | 20.4 | 19.0 | |
| Modulus in flexure/Mpa | 2460 | 2387 | 2345 | 2543 | 2421 |
Claims (10)
1. packaging steel coils highstrenghtpiston corner protector; It is characterized in that: it comprises that one curves the end plates that columnar side panel and curves annular; An annulus edge of the edge of one end of cylindrical side plate and annular end plates is connected; Formed by Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR), spun glass, antioxidant 1010, inhibitor 1076 feedstock production, the shared mass fraction of each raw material is:
Vestolen PP 7052 65～85,
Linear low density polyethylene 6～15,
New LDPE (film grade) 6～15,
High density polyethylene(HDPE) 8～12,
Styrene-butadiene rubber(SBR) 3～8,
Spun glass 10～15,
Antioxidant 1010 0.1～0.5,
Inhibitor 1,076 0.1～0.5.
2. packaging steel coils highstrenghtpiston corner protector according to claim 1, it is characterized in that: described raw material also comprises:
Coupling agent 0.5～0.7,
Nucleator 0.5～1,
Calcium/zinc stabilizer 1～2,
Bright lubricant 2～3.
3. packaging steel coils highstrenghtpiston corner protector according to claim 1 is characterized in that: described Vestolen PP 7052 is PPK8303, tensile yield strength >=22.0Mpa, elongation at break＞200%, melt flow rate(MFR) 1.0-3.0g/10min; Described linear low density polyethylene is LLDPE7042, tensile yield strength >=8.3Mpa, elongation at break＞500%, melt flow rate(MFR) 1.7-2.3g/10min; Described new LDPE (film grade) is LDPE2426H, tensile yield strength >=10.0Mpa, elongation at break＞200%, melt flow rate(MFR) 1.7-2.2g/10min; Described high density polyethylene(HDPE) is HDPE5000S, tensile yield strength >=24.0Mpa, elongation at break＞500%, melt flow rate(MFR) 0.8-1.1g/10min; Described styrene-butadiene rubber(SBR) is SBS1301, and the S/B ratio is 30/70, tensile strength >=15.0Mpa, tensile yield＞750%, melt flow rate(MFR) 0.5-5.0g/10min.
4. packaging steel coils highstrenghtpiston corner protector according to claim 1 is characterized in that: described nucleator is Sodium Benzoate, phenylformic acid cadmium, bismuth salicylate or titanous oxalate; Described bright lubricant is anti-glass emergence on the surface agent TAF; Described coupling agent is silane coupling agent, titanate coupling agent or aluminate coupling agent.
5. packaging steel coils highstrenghtpiston corner protector according to claim 1; It is characterized in that: the edge of said side panel one end is connected with the outer toroid edge of annular end plates; The cylinder outer side wall of side panel is provided with the annular stiffening web, and the end face of end plates is provided with the annular stiffening web; The junction of said side panel and end plates is provided with a plurality of " L " shape brace rod, and two arms of said brace rod are separately positioned on the end face of end plates on the cylinder outer side wall with side panel; Brace rod is evenly distributed on side panel and the end plates.
6. packaging steel coils highstrenghtpiston corner protector according to claim 5, it is characterized in that: hoop is laid with water vent on the said end plates, and annular is laid with the steel band groove on the said side panel.
7. packaging steel coils highstrenghtpiston corner protector according to claim 1; It is characterized in that: the interior annulus edge of the edge of an end of said side panel and annular end plates is connected; The cylinder inner side-wall of side panel is provided with the annular stiffening web, and the end face of end plates is provided with the annular stiffening web; The junction of said side panel and end plates is provided with a plurality of " L " shape brace rod, and two arms of said brace rod are separately positioned on the end face of end plates on the cylinder inner side-wall with side panel; Brace rod is evenly distributed on side panel and the end plates.
8. packaging steel coils highstrenghtpiston corner protector according to claim 7 is characterized in that: have the fixed orifices that a row arranges along the side panel direction on the end of said side panel one end, the other end of side panel is provided with the fastener that is used to pin fixed orifices.
9. the preparation method of packaging steel coils highstrenghtpiston corner protector is characterized in that, it comprises following process step:
1) by each raw materials in part by weight be:
Vestolen PP 7052 65～85,
Linear low density polyethylene 6～15,
New LDPE (film grade) 6～15,
High density polyethylene(HDPE) 8～12,
Styrene-butadiene rubber(SBR) 3～8,
Spun glass 10～15,
Antioxidant 1010 0.1～0.5,
Inhibitor 1,076 0.1～0.5,
Choose Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR), spun glass, antioxidant 1010, inhibitor 1076, subsequent use;
2) Vestolen PP 7052, linear low density polyethylene, new LDPE (film grade), high density polyethylene(HDPE), styrene-butadiene rubber(SBR) are dropped in the high-speed mixer, drop into antioxidant 1010 and inhibitor 1076 again; Even 80～100 ℃ of high-speed stirring to raw materials mix, obtain compound;
3) compound is added in the feeding trough of twin screw extruder; The charging opening of spun glass in downstream adopts follow-up feed way extruding pelletization; The screw zones temperature of said twin screw extruder is following: 140～170 ℃ of feeding sections; 160～180 ℃ of transportation sections, 170～200 ℃ of melt zones, 200～210 ℃ of heads;
4) drying; After the injection moulding machine injection moulding, injection temperature is following: 160～180 ℃ of feeding sections, and 180～200 ℃ of transportation sections, 200～220 ℃ of melt zones, 210～230 ℃ of nozzles obtain packaging steel coils highstrenghtpiston corner protector.
10. the preparation method of packaging steel coils highstrenghtpiston corner protector according to claim 9 is characterized in that, 60～80 ℃ of described drying temperatures, 0.5～1 hour time of drying.
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| CN2012100599856A CN102604217B (en) | 2012-03-07 | 2012-03-07 | High-strength plastic corner protector for steel oil packaging and preparation method thereof |
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| CN2012100599856A CN102604217B (en) | 2012-03-07 | 2012-03-07 | High-strength plastic corner protector for steel oil packaging and preparation method thereof |
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| CN102850857A (en) * | 2012-09-28 | 2013-01-02 | 四川仁智油田技术服务股份有限公司 | Steel pipeline anticorrosive material and preparation method of steel pipeline anticorrosive material |
| CN104788810A (en) * | 2015-03-31 | 2015-07-22 | 苏州市鼎立包装有限公司 | Formula and preparation method of high-strength polypropylene packaging bag |
| CN105295155A (en) * | 2014-06-09 | 2016-02-03 | 南通慧源塑胶有限公司 | Plastic formula |
| CN105694220A (en) * | 2016-03-17 | 2016-06-22 | 合肥晨煦信息科技有限公司 | Flexible freight bag |
| CN108859075A (en) * | 2018-07-19 | 2018-11-23 | 邯郸市邯钢附属企业公司 | A kind of Protective angle of steel roll production line |
| CN112126143A (en) * | 2019-06-24 | 2020-12-25 | 上海清远管业科技股份有限公司 | Cassette type HDPE hollow wall shield segment protective sleeve and preparation method thereof |
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| CN108859075A (en) * | 2018-07-19 | 2018-11-23 | 邯郸市邯钢附属企业公司 | A kind of Protective angle of steel roll production line |
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| CN112126143A (en) * | 2019-06-24 | 2020-12-25 | 上海清远管业科技股份有限公司 | Cassette type HDPE hollow wall shield segment protective sleeve and preparation method thereof |
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