CN101768319A - High-toughness polypropylene foamed plate for externally packaging steel coil and preparation method thereof - Google Patents
High-toughness polypropylene foamed plate for externally packaging steel coil and preparation method thereof Download PDFInfo
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- CN101768319A CN101768319A CN200910264014A CN200910264014A CN101768319A CN 101768319 A CN101768319 A CN 101768319A CN 200910264014 A CN200910264014 A CN 200910264014A CN 200910264014 A CN200910264014 A CN 200910264014A CN 101768319 A CN101768319 A CN 101768319A
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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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
-
- 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
-
- 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
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Graft Or Block Polymers (AREA)
Abstract
The invention discloses a high-toughness polypropylene foamed plate for externally packaging a steel coil and a preparation method thereof. With the advantages of light mass, low price, high toughness and good properties of enduring folding, temperature as well as weather, the foamed plate can be used as a circumferential protection plate, an end-face protection plate and a corner protection plate for the steel coil. The high-toughness polypropylene foamed plate for externally packaging the steel coil is made from the following raw materials (the weight percent of each raw material is shown in brackets): polypropylene resin particles (60 to 70%), polypropylene resin powder (25 to 35%), a polyfunctional monomer (1 to 6%), nano powder catalyst (0.5 to 3%), an accelerating agent (0.01 to 0.2%), an initiating agent (0.05 to 0.5%), an antioxidant (0.2 to 2%), a wetting dispersant (0.1 to 0.3%), a foaming agent (0.5 to 2 %), and a master batch (0 to 3%), wherein the polyfunctional monomer is trimethylolpropane triacrylate or trimethylolpropane trimethylacrylate.
Description
Technical field
The present invention relates to a kind of polypropylene foamed plate and preparation method,, belong to polymer wrapping material field more specifically to a kind of high-toughness polypropylene foamed plate and preparation method who is used for externally packaging steel coil.
Background technology
Steel roll package is that coil of strip stores, the important sfgd. of transportation; thickness is less than the steel plate finished product of 3mm; as: metallurgical cold-reduced sheet, galvanized sheet, colour coated plate, silicon steel sheet and tin plate etc.; how to pack sale in the mode of coiled material; its protective packaging mainly is divided into circumferential backplate, end face backplate and corner protector, and wrapping material mainly are divided into Wooden package, mental package and plastic wrapping.Wooden package wherein adopts composite fiber plate more, and the moisture absorption and cracked is successively damaged protection easily, causes steel plate scratch and corrosion; Galvanized sheet iron is adopted in mental package wherein more, and shock-absorbing capacity is poor during bump, causes damaging of surface of steel plate and steel plate end face easily; Plastic wrapping wherein is inexpensive with its light weight, be convenient to pack and the effect of waterproof damp proof insulation, obtains more and more to use.The packing manufacturer of general plastic material adopts common polythene, polypropylene or their reworked material more, the subject matter of current existence is: rupture easily in the time of the warpage packing, suffer ballistic the time damaged easily, soften easily in the time of sunlight exposure, need further improve the use properties of material.
The patent No. is the utility model patent " low bubble strengthens composite plastic plate " of ZL 200820065350.6, relate to a kind of composite plastic plate that is used for members such as packed steel coil and steel plate, include the low bubble of 1～3mm sandwich layer, its two sides covers 0.3～1mm sheet plastic layer, described composition board has higher snappiness and the anti-fracture performance of shock resistance, and the sheet material total quality is light, and resistance to low temperature is good, simple for production, instant packed.
In this method, do not illustrate described low bubble sandwich layer and sheet plastic layer are to adopt what plastics, do not illustrate that described low bubble sandwich layer is what foamed state and density range yet, the coextrusion process and the performance index of composite sheet more are not described, so there are not enough foundations to infer that this patent has directiveness and practicality.
Publication number is the patent of invention " waterproof packing cardboard and preparation method thereof " of CN 101037854A, the making method that relates to a kind of waterproof and antirust packaging paperboard, described compound water repellent agent is formed by weight 4～6: 1 system of mixing by alkyl ketene dimer and daiamid epoxy resin, described rust-preventive agent is vapour-phase inhibitor, this waterproof board forms through MULTILAYER COMPOSITE, has intensity and toughness preferably, shock-resistant, being used to pack steel (volume) sheet material can satisfy packing instructions and reach outdoor requirement of depositing, be convenient to after the use reclaim and regeneration, but natural degradation also.
In this method, the insufficient place of its performance is that the snappiness of packing board is not enough, fragility is bigger, is hit still to be easy to fracture, has a strong impact on the steel roll package quality of stability; About using the back to reclaim and the feasibility of regeneration does not propose clear and definite method, because of dip-coating a large amount of compound water repellent agents make the very difficult also not environmental protection that becomes of the natural degradation of described waterproof board, and cost is higher, the production process relative complex.
In the above method, all do not refer explicitly to polypropylene foam material and be applied to steel roll package, need a kind of polypropylene foamed plate that possesses the good anti-fracture performance of shock resistance of exploitation, alleviate the sheet material total quality greatly, thereby improved exterior quality, production efficiency and the processing safety of steel roll package.
Summary of the invention
The objective of the invention is to solve technical requirements and the existing problems that polypropylene foam material is applied to externally packaging steel coil, a kind of high-toughness polypropylene foamed plate that is used for externally packaging steel coil is provided, it has inexpensive, the tough folding of lightweight, the weatherable advantage of heatproof, can be used for circumferential backplate, end face backplate and the corner protector of coil of strip.
The present invention simultaneously also provides the preparation of plates method, and technology is simple.
Technical scheme of the present invention is as follows:
The high tough polypropylene foamed plate that is used for externally packaging steel coil of the present invention, it is to make: profax resin granular material 60～70% by following weight percent raw material, acrylic resin powder 25～35%, polyfunctional monomer 1～6%, nano powder catalyst 0.5～3%, promotor 0.01～0.2%, initiator 0.05～0.5%, oxidation inhibitor 0.2～2%, wetting dispersing agent 0.1～0.3%, whipping agent 0.5～2%, Masterbatch 0～3%, wherein said polyfunctional monomer are Viscoat 295 (TMPTA) or trimethylolpropane trimethacrylate (TMPTMA).
The high tough polypropylene foamed plate that is used for externally packaging steel coil of the present invention, the melting index that its further technical scheme is described acrylic resin is 1.5～10.0g/10min, preferred model is the acrylic resin of PP K8003 or PP 075.
The high tough polypropylene foamed plate that is used for externally packaging steel coil of the present invention, its further technical scheme can also be that described nano powder catalyst is nano-calcium carbonate, nano titanium oxide or nano imvite; Described promotor is zinc salt of dithiocarbamate class promotor; Further technical scheme is that described zinc salt of dithiocarbamate class is ziram (PZ), zinc diethyldithiocarbamate (ZDC) or zinc dibutyl dithiocaarbamate (BZ) again; Described oxidation inhibitor is the compound system of phenolic antioxidant or itself and phosphite ester kind antioxidant, and phenolic antioxidant is preferred 1010, and compound system preferred 1010/168 is composite; Described wetting dispersing agent is white oil or water.
The high tough polypropylene foamed plate that is used for externally packaging steel coil of the present invention, its further technical scheme can also be that described initiator is benzoyl peroxide (BPO) or dicumyl peroxide (DCP).
The high tough polypropylene foamed plate that is used for externally packaging steel coil of the present invention, its further technical scheme can also be that described whipping agent is 4, the blend (ADC) of 4-OBSH (OBSH) or Cellmic C 121 and zinc oxide.
The high tough polypropylene foamed plate that is used for externally packaging steel coil of the present invention, its further technical scheme can also be that this foaming plate is made by following weight percent raw material: model is a PP K8003 polypropylene granules 60～70%, model is PP 075 polypropylene powder 25～35%, TMPTA monomer 2.5～3.5%, nano-calcium carbonate 1～2%, promotor ziram 0.05～0.1%, initiator B PO 0.2～0.3%, compound system antioxidant 1010/168 0.3～1.0%, white oil 0.1～0.15%, whipping agent OBSH 0.5～0.8%, further technical scheme is to add Masterbatch 1～2% again, can obtain high tough expanded polypropylene volume (plate) material of corresponding color, play the effect of beautifying packing.
The high tough polypropylene foamed plate that is used for externally packaging steel coil of the present invention, the apparent density that its further technical scheme can also be this sheet material is 0.40～0.60g/cm
3, sheet metal thickness is 1.5～2.5mm.
The preparation method of the high tough polypropylene foamed plate that is used for externally packaging steel coil that the present invention is above-mentioned may further comprise the steps:
(1) premix:, comprise that acrylic resin, polyfunctional monomer, nano powder catalyst, promotor and initiator place the mixer high speed to stir, and take out stand-by after 5～20 minutes with the part component;
(2) graft reaction: the Preblend that step (1) is obtained drops into the charging opening that length-to-diameter ratio is 33～55: 1 double-screw extruding pelletizing machine, barrel temperature is controlled at 165～205 ℃, screw speed is 100～300 rev/mins, function monomer and acrylic resin generation graft reaction obtain high melt strength, propylene modified resin;
(3) extrusion foaming plate: high melt strength, propylene modified resin and auxiliary agent that step (2) is obtained; comprise that oxidation inhibitor, wetting dispersing agent, whipping agent and Masterbatch mix; add to plastify on single (or two) screw rod extrusion board machine and extrude; barrel temperature is 165～185 ℃; die head temperature is 168～178 ℃; the die lip gap is 0.8～2.0mm, obtains apparent density 0.40～0.60g/cm
3, thickness 1.5～2.5mm fine and closely woven abscess polypropylene volume (plate) material.
The preparation method who is used for the high tough polypropylene foamed plate of externally packaging steel coil of the present invention, its further technical scheme is that the screw diameter of the double-screw extruding pelletizing machine described in the step (2) is 50～85mm, screw slenderness ratio is 40～48: 1, and the full section of barrel has 1～2 place's gas barrier or vacuum suction device; The mould effective width of list (or two) the screw rod extrusion board machine described in the step (3) is 800～2400mm, screw slenderness ratio is 33: 1～45: 1, it is buttoned-up status that the full section of barrel must not have gas barrier or gas barrier, dispose a self balancing gear type melt pressure pump between barrel end and extrusion die, extrusion die is the rack-style flow passage structure.
Compared with prior art the invention has the beneficial effects as follows:
The present invention carries out graft modification by adopting specific polyfunctional monomer to acrylic resin, and extrusion foaming behind the interpolation chemical foaming agent, obtains thickness 1.5～2.5mm, density 0.40～0.60g/cm
3Foaming polypropylene sheet, has very outstanding performance, the high tough polypropylene foamed plate of the present invention's preparation, lightweight and intensity is higher, proportion is 1/15～1/20 of steel plate galvanized, be used for externally packaging steel coil and can alleviate operator's working strength greatly, improved production efficiency and security simultaneously, and reduced material cost.
Use the tough polypropylene foamed plate of height of the present invention, tear strength, stretch-proof, anti-bending and weathering resistance are good, have solved warpage easy fracture, the yielding plastics packaging material of Exposure to Sunlight FAQs.Compare with traditional iron sheet, the packing of fiberboard, have that exquisite appearance, lightweight are inexpensive, acid and alkali-resistance, protection against the tide, an advantage such as antirust, the outward appearance that can better protect coil of strip.
Embodiment
Below by specific embodiment explanation the present invention, but the present invention not merely is defined in these embodiment.
Embodiment 1
Proportioning raw materials:
Polypropylene granules (K8003) 62%, polypropylene powder (075) 30%, TMPTA monomer 5%, nano-calcium carbonate 1.5%, promotor PZ 0.1%, initiator B PO 0.5%, antioxidant 1010 0.3%, white oil 0.1%, whipping agent OBSH 0.5%.The preparation method:
(1) premix: place the mixer high speed to stir part component (acrylic resin, TMPTA monomer, nano-calcium carbonate, PZ, BPO), take out stand-by after 15 minutes;
(2) graft reaction: the Preblend input length-to-diameter ratio that step (1) is obtained is the charging opening of 45: 1 65 type double-screw extruding pelletizing machines, barrel temperature is controlled at 185～205 ℃, screw speed is 200 rev/mins, function monomer and acrylic resin generation graft reaction, obtain high melt strength, propylene modified resin, production process does not have obvious emission of bad smell;
(3) extrusion foaming plate: high melt strength, propylene modified resin and auxiliary agent (oxidation inhibitor, white oil, whipping agent) that step (2) is obtained mix, add to plastify on the 120 type list screw rod extrusion board machines and extrude, barrel temperature is 165～185 ℃, die head temperature is 168～178 ℃, the die lip gap is 1.0mm, and the mould effective width is 1600mm, and the foaming plate of extruding prolongs through three roll-ins, adjust three roller gaps and three roller linear velocities, obtain thickness 1.5mm, density 0.52g/cm
3Fine and closely woven abscess polypropylene board.Detect through following the tracks of, longitudinal tensile strength is that 29MPa, transverse tensile strength are 25MPa, vertically trousers type tear strength is 19MPa, laterally trousers type tear strength is 23MPa, the longitudinal fracture elongation is 25%, the transverse breakage elongation is 22%, and vertically vicat softening temperature is 122 ℃, laterally vicat softening temperature is 112 ℃.
Embodiment 2
Polypropylene granules (K8003) 60%, polypropylene powder (075) 33%, TMPTA monomer 4%, nano-calcium carbonate 1.5%, promotor PZ 0.1%, initiator B PO 0.5%, antioxidant 1010 0.3%, white oil 0.1%, whipping agent OBSH 0.5%.The preparation method:
(1) premix: place the mixer high speed to stir part component (acrylic resin, TMPTA monomer, nano-calcium carbonate, PZ, BPO), take out stand-by after 15 minutes;
(2) graft reaction: the Preblend input length-to-diameter ratio that step (1) is obtained is the charging opening of 45: 1 65 type double-screw extruding pelletizing machines, barrel temperature is controlled at 185～205 ℃, screw speed is 200 rev/mins, function monomer and acrylic resin generation graft reaction, obtain high melt strength, propylene modified resin, production process does not have obvious emission of bad smell;
(3) extrusion foaming plate: high melt strength, propylene modified resin and auxiliary agent (oxidation inhibitor, white oil, whipping agent) that step (2) is obtained mix, add to plastify on the 120 type list screw rod extrusion board machines and extrude, barrel temperature is 165～185 ℃, die head temperature is 168～178 ℃, the die lip gap is 1.0mm, and the mould effective width is 1600mm, and the foaming plate of extruding prolongs through three roll-ins, adjust three roller gaps and three roller linear velocities, obtain thickness 1.5mm, density 0.56g/cm
3Fine and closely woven abscess polypropylene board.Detect through following the tracks of, longitudinal tensile strength is that 24.5MPa, transverse tensile strength are 22MPa, vertically trousers type tear strength is 18MPa, laterally trousers type tear strength is 21MPa, the longitudinal fracture elongation is 31%, the transverse breakage elongation is 27%, and vertically vicat softening temperature is 117 ℃, laterally vicat softening temperature is 109 ℃.
Embodiment 3
Polypropylene granules (K8003) 66%, polypropylene powder (075) 28%, TMPTA monomer 3%, nano-calcium carbonate 1.5%, promotor PZ 0.1%, initiator B PO 0.5%, antioxidant 1010 0.3%, white oil 0.1%, whipping agent OBSH 0.5%.
The preparation method:
(1) premix: place the mixer high speed to stir part component (acrylic resin, TMPTA monomer, nano-calcium carbonate, PZ, BPO), take out stand-by after 10 minutes;
(2) graft reaction: the Preblend input length-to-diameter ratio that step (1) is obtained is the charging opening of 45: 1 65 type double-screw extruding pelletizing machines, barrel temperature is controlled at 185～205 ℃, screw speed is 180 rev/mins, function monomer and acrylic resin generation graft reaction, obtain high melt strength, propylene modified resin, production process does not have obvious emission of bad smell;
(3) extrusion foaming plate: high melt strength, propylene modified resin and auxiliary agent (oxidation inhibitor, white oil, whipping agent) that step (2) is obtained mix, add to plastify on the 120 type list screw rod extrusion board machines and extrude, barrel temperature is 165～185 ℃, die head temperature is 168～178 ℃, the die lip gap is 1.2mm, and the mould effective width is 1300mm, and the foaming plate of extruding prolongs through three roll-ins, adjust three roller gaps and three roller linear velocities, obtain thickness 1.8mm, density 0.48g/cm
3Fine and closely woven abscess polypropylene board.Detect through following the tracks of, longitudinal tensile strength is that 22.5MPa, transverse tensile strength are 20MPa, vertically trousers type tear strength is 17MPa, laterally trousers type tear strength is 19.5MPa, the longitudinal fracture elongation is 38%, the transverse breakage elongation is 32%, and vertically vicat softening temperature is 108 ℃, laterally vicat softening temperature is 102 ℃.
Embodiment 4
Polypropylene granules (K8003) 65%, polypropylene powder (075) 30%, TMPTA monomer 2%, nano-calcium carbonate 1.5%, promotor PZ 0.1%, initiator B PO 0.5%, antioxidant 1010 0.3%, tap water 0.1%, whipping agent OBSH 0.5%.The preparation method:
(1) premix: place the mixer high speed to stir part component (acrylic resin, TMPTA monomer, nano-calcium carbonate, PZ, BPO), take out stand-by after 10 minutes;
(2) graft reaction: the Preblend input length-to-diameter ratio that step (1) is obtained is the charging opening of 40: 1 50 type double-screw extruding pelletizing machines, barrel temperature is controlled at 185～205 ℃, screw speed is 180 rev/mins, function monomer and acrylic resin generation graft reaction, obtain high melt strength, propylene modified resin, production process does not have obvious emission of bad smell;
(3) extrusion foaming plate: high melt strength, propylene modified resin and auxiliary agent (oxidation inhibitor, tap water, whipping agent) that step (2) is obtained mix, add to plastify on the 120 type list screw rod extrusion board machines and extrude, barrel temperature is 165～185 ℃, die head temperature is 168～178 ℃, the die lip gap is 1.2mm, and the mould effective width is 1300mm, and the foaming plate of extruding prolongs through three roll-ins, adjust three roller gaps and three roller linear velocities, obtain thickness 2.0mm, density 0.53g/cm
3Fine and closely woven abscess polypropylene board.Detect through following the tracks of, longitudinal tensile strength is that 18.5MPa, transverse tensile strength are 15.5MPa, vertically trousers type tear strength is 14MPa, laterally trousers type tear strength is 16.5MPa, the longitudinal fracture elongation is 66%, the transverse breakage elongation is 52%, and vertically vicat softening temperature is 102 ℃, laterally vicat softening temperature is 97 ℃.
Embodiment 5
Polypropylene granules (K8003) 63%, polypropylene powder (075) 30%, TMPTMA monomer 2.5%, nano-calcium carbonate 2%, promotor PZ 0.1%, initiator B PO 0.4%, initiator DCP 0.1%, antioxidant 1010 0.3%, white oil 0.1%, whipping agent ADC 1.5%.
The preparation method:
(1) premix: place the mixer high speed to stir part component (acrylic resin, TMPTMA monomer, nano-calcium carbonate, PZ, BPO, DCP), take out stand-by after 10 minutes;
(2) graft reaction: the Preblend input length-to-diameter ratio that step (1) is obtained is the charging opening of 40: 1 50 type double-screw extruding pelletizing machines, barrel temperature is controlled at 185～205 ℃, screw speed is 180 rev/mins, function monomer and acrylic resin generation graft reaction, obtain high melt strength, propylene modified resin, production process does not have obvious emission of bad smell;
(3) extrusion foaming plate: high melt strength, propylene modified resin and auxiliary agent (oxidation inhibitor, white oil, whipping agent) that step (2) is obtained mix, add to plastify on the 75 type twin screw extrusion board machines and extrude, barrel temperature is 165～175 ℃, die head temperature is 170～175 ℃, the die lip gap is 1.8mm, and the mould effective width is 800mm, and the foaming plate of extruding rolls through three-roller, adjust three roller gaps and three roller linear velocities, obtain thickness 2.5mm, density 0.58g/cm
3Fine and closely woven abscess polypropylene board.Detect through following the tracks of, longitudinal tensile strength is that 17MPa, transverse tensile strength are 14.5MPa, vertically trousers type tear strength is 12MPa, laterally trousers type tear strength is 13MPa, the longitudinal fracture elongation is 41%, the transverse breakage elongation is 36%, and vertically vicat softening temperature is 105 ℃, laterally vicat softening temperature is 99 ℃.
Claims (10)
1. high tough polypropylene foamed plate that is used for externally packaging steel coil, it is characterized in that it is to be made by following weight percent raw material: profax resin granular material 60～70%, acrylic resin powder 25～35%, polyfunctional monomer 1～6%, nano powder catalyst 0.5～3%, promotor 0.01～0.2%, initiator 0.05～0.5%, oxidation inhibitor 0.2～2%, wetting dispersing agent 0.1～0.3%, whipping agent 0.5～2%, Masterbatch 0～3%, wherein said polyfunctional monomer are Viscoat 295 or trimethylolpropane trimethacrylate.
2. the high tough polypropylene foamed plate that is used for externally packaging steel coil according to claim 1, the melting index that it is characterized in that described acrylic resin is 1.5～10.0g/10min.
3. the high tough polypropylene foamed plate that is used for externally packaging steel coil according to claim 1 is characterized in that described nano powder catalyst is nano-calcium carbonate, nano titanium oxide or nano imvite; Described promotor is zinc salt of dithiocarbamate class promotor.
4. the high tough polypropylene foamed plate that is used for externally packaging steel coil according to claim 3 is characterized in that described zinc salt of dithiocarbamate class is ziram, zinc diethyldithiocarbamate or zinc dibutyl dithiocaarbamate; Described oxidation inhibitor is the compound system of phenolic antioxidant or itself and phosphite ester kind antioxidant; Described wetting dispersing agent is white oil or water.
5. the high tough polypropylene foamed plate that is used for externally packaging steel coil according to claim 1 is characterized in that described initiator is benzoyl peroxide or dicumyl peroxide.
6. the high tough polypropylene foamed plate that is used for externally packaging steel coil according to claim 1 is characterized in that described whipping agent is 4, the blend of 4-OBSH or Cellmic C 121 and zinc oxide.
7. the high tough polypropylene foamed plate that is used for externally packaging steel coil according to claim 1 is characterized in that it is to be made by following weight percent raw material: model is that PP K8003 polypropylene granules 60～70%, model are PP 075 polypropylene powder 25～35%, TMPTA monomer 2.5～3.5%, nano-calcium carbonate 1～2%, promotor ziram 0.05～0.1%, initiator B PO 0.2～0.3%, compound system antioxidant 1010/1680.3～1.0%, white oil 0.1～0.15%, whipping agent OBSH 0.5～0.8%.
8. the high tough polypropylene foamed plate that is used for externally packaging steel coil according to claim 1, the apparent density that it is characterized in that this sheet material is 0.40～0.60g/cm
3, sheet metal thickness is 1.5～2.5mm.
9. one kind as the arbitrary described preparation method who is used for the high tough polypropylene foamed plate of externally packaging steel coil of claim 1～8, it is characterized in that may further comprise the steps:
(1) premix:, comprise that acrylic resin, polyfunctional monomer, nano powder catalyst, promotor and initiator place the mixer high speed to stir, and take out stand-by after 5～20 minutes with the part component;
(2) graft reaction: the Preblend that step (1) is obtained drops into the charging opening that length-to-diameter ratio is 33～55: 1 double-screw extruding pelletizing machine, barrel temperature is controlled at 165～205 ℃, screw speed is 100～300 rev/mins, function monomer and acrylic resin generation graft reaction obtain high melt strength, propylene modified resin;
(3) extrusion foaming plate: high melt strength, propylene modified resin and auxiliary agent that step (2) is obtained; comprise that oxidation inhibitor, wetting dispersing agent, whipping agent and Masterbatch mix; add to plastify on single (or two) screw rod extrusion board machine and extrude; barrel temperature is 165～185 ℃; die head temperature is 168～178 ℃; the die lip gap is 0.8～2.0mm, obtains apparent density 0.40～0.60g/cm
3, thickness 1.5～2.5mm fine and closely woven abscess polypropylene volume (plate) material.
10. the preparation method who is used for the high tough polypropylene foamed plate of externally packaging steel coil according to claim 9, the screw diameter that it is characterized in that the double-screw extruding pelletizing machine described in the step (2) is 50～85mm, screw slenderness ratio is 40～48: 1, and the full section of barrel has 1～2 place's gas barrier or vacuum suction device; The mould effective width of list (or two) the screw rod extrusion board machine described in the step (3) is 800～2400mm, screw slenderness ratio is 33: 1～45: 1, it is buttoned-up status that the full section of barrel must not have gas barrier or gas barrier, dispose a self balancing gear type melt pressure pump between barrel end and extrusion die, extrusion die is the rack-style flow passage structure.
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| CN101921430A (en) * | 2010-08-18 | 2010-12-22 | 苏州奔腾塑业有限公司 | Mineral filled polypropylene with high strength and high impact resistance and preparation method thereof |
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| CN101921430A (en) * | 2010-08-18 | 2010-12-22 | 苏州奔腾塑业有限公司 | Mineral filled polypropylene with high strength and high impact resistance and preparation method thereof |
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| CN102408629A (en) * | 2011-09-23 | 2012-04-11 | 福建师范大学 | Preparation method for polypropylene foaming material based on novel auxiliary system |
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| CN102643108B (en) * | 2012-03-08 | 2014-04-09 | 南通岩艺涂装科技有限公司 | Auxiliary system for composite portland cement foaming board |
| CN104254562A (en) * | 2012-04-27 | 2014-12-31 | 井上股份有限公司 | Method for producing resin foam, and resin foam |
| CN104254562B (en) * | 2012-04-27 | 2017-11-17 | 井上股份有限公司 | Manufacture the method and resin foamed material of resin foamed material |
| CN107021780A (en) * | 2017-03-30 | 2017-08-08 | 合肥金同维低温科技有限公司 | A kind of refrigerator sound-insulating material and preparation method |
| CN111169807A (en) * | 2019-12-27 | 2020-05-19 | 东莞市晨峰包装材料科技有限公司 | Structure of oil-resistant and rust-resistant packaging material |
| CN111169807B (en) * | 2019-12-27 | 2022-03-18 | 东莞市晨峰包装材料科技有限公司 | Structure of oil-resistant and rust-resistant packaging material |
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