Background technology
Since plastics industry develop widespread use with plastics rapidly, the filling plastic technology obtains people's attention day by day.In plastic working, pass through to add various mineral filler composite moldings, not only can greatly reduce the production cost of plastics, and can significantly improve some performances of plastics, as: mechanical property, thermal characteristics, electrical property, wear resisting property, lubricity and ageing-resistant etc., thus give plastics new characteristic, to satisfy the needs of different purposes; Simultaneously in plastics processing, lubricated also is indispensable sport technique segment, and utilize spherical and the sheet inorganic powder as lubricant or lubrication assistant composition existing more precedent in power lubrication, but be used in the plastic working also seldom.By coat and intercalation is compound will be spherical compound with the sheet powder, in conjunction with both advantages, overcome both weakness, can have simultaneously good mechanical property as Lubrication Composition for plastics, be the field of a blank.
Chinese patent CN87102663 has openly reported a kind of plastic filler parent granule of high dispersive type, this filler parent granule can be under larger loading level, not only do not reduce the physical and mechanical properties of former plastics, and its processing characteristics and physical and mechanical properties are increased substantially, so both reduced the plastics cost, improved again its quality.This filler parent granule,, through auxiliary agent surface treatments such as chelating type phthalates and take petroleum resin, ethylene-propylene rubber(EPR), low-molecular-weight resin, dispersion agent, waste and old recovery polyolefin blend body as carrier, is formed through mixing, in blocks, pelletizing as matrix by calcium carbonate.
Chinese patent CN201110098592.1 has openly reported a kind of plastic filler parent granule, contains vector resin, terephthaldehyde's acid metal salt, silane coupling agent, lubricant.Wherein vector resin is selected from newborn plastics or reprocessed plastic(s), and lubricant is selected from one or more in paraffin, white oil, the stearic acid.
Chinese patent CN200310117747.7 has openly reported a kind of filling graphite lubrication masterbatch and production method thereof.Take graphite, Low Density Polyethylene or linear low density polyethylene and titanic acid ester, Aluminate or silane coupling agent, mineral oil or white oil and various functional agent as raw material, after above-mentioned each component mixed by a certain percentage, form through at a certain temperature melting mixing, granulation of twin screw extruder.Graphite lubrication masterbatch of the present invention can join nylon easily, in the engineering plastics such as polyoxymethylene, reaches lubricated and wear-resisting effect.
Chinese patent CN201010588014.1 has openly reported the preparation method of high-content superfine inorganic powder master batch for filling plastic, the preparation method who it is characterized in that this master batch adopts metering feeding, twin screw extruder plasticizing with two side feedings is extruded, and fervent air-cooled granulation gets ultra tiny inorganic powder master batch; The prescription of master batch is by mass percentage: inorganic super-fine powder 75~90wt%, additive 2~12wt%, carrier 8~20wt%.The invention solves superfine powder feeding in the ultra tiny inorganic powder filled master batch preparation process of high-content difficult, disperse inhomogeneous, to the problems such as pollution of environment.Good, the excellent product performance of its dispersion effect when this master batch is used for the reinforced plastics modification.
What the foregoing invention patent was all reported is respectively the filling plastic function, or be lubricating function, can not reach a filling and the lubricated purpose that combines, there is no so far by filler is combined to prepare the report that a kind of filling plastic lubricates masterbatch with lubricating.
Summary of the invention
The object of the invention is to solve above technical problem, provide a kind of filling plastic to lubricate master batch, preferred by raw material, utilize sheet and spherical inorganic powder compound and mutually collaborative, cooperate the lubricant that is fit to, add simultaneously other functional aids, each component is reasonably compound, make the packing lubrication master batch of formation in plastic working, have good oilness and fill increment effect, have the effects such as toughness reinforcing enhancing, increase rigidity concurrently, be conducive to simplify plastic formula and technique, improve the plastics performance, reduce production costs.
The present invention is by the following technical solutions: a kind of filling plastic lubricates master batch, it is characterized in that 100 parts of inorganic powders by mass, 20~100 parts of lubricants, 1~5 lubrication assistant dispersion agent, 0.1~3 part of coupling agent, 5~30 parts vector resin, the particle of 0~2 part of compound composition of functional agent.
For making the packing lubrication master batch have good mobile improvement effect, strengthening toughening effect, further technical scheme is: described inorganic powder be by the inorganic powder of the inorganic powder of sheet and sphere or almost spherical in the ratio of 2:1~2:3 to coat and the intercalation mode is composited, the inorganic powder of part sphere or almost spherical is coated on outside the kernel that the inorganic powder of sheet forms as shell, and the inorganic powder of the sphere of part small particle size or almost spherical infiltrates sheet inorganic powder interlayer.By spherical inorganic powder is remained on the sheet inorganic powder surface, make the easier generation of spherical inorganic powder roll and slide; The spherical inorganic powder that is inserted into sheet inorganic powder interlayer also helps the interformational sliding of sheet inorganic powder.This effect is the most remarkable in the friction of plastic pellet and processing units inwall, makes composite granule play the effect of similar external lubricant.
For the mobile improvement effect, the enhancing toughening effect that make the packing lubrication master batch are further optimized, further technical scheme is: the inorganic powder of described sheet comprises one or more in polynite, kaolin, graphite, talcum powder, molybdenumdisulphide, mica, brucite, the aluminium hydroxide, powder footpath/thickness rate 20~50, thickness 100~500nm.Different types of sheet inorganic powder interfloor distance is different, and the complexity of interformational sliding is different, and strengthening simultaneously toughening effect also has notable difference; The powder size is different, and the dispersed difference in plastics is lubricated also different with reinforced effects, and is also not identical with the effect of spherical powder volume recombination.So kind, size to powder have all been carried out preferably.
For making the packing lubrication master batch have good processibility, further technical scheme is: the inorganic powder of described sphere or almost spherical comprises one or more in barium sulfate, glass microballon, titanium dioxide, sulfurated lime, silica powder, the Feldspar Powder, diameter of particle scope 1000~5000 orders.The kind size of sphere or almost spherical powder will affect the dispersiveness in plastics equally, lubricated and reinforced effects and and powder between compound effect.So sphere or almost spherical inorganic powder are carried out preferably also being necessary.
For the processibility that makes the packing lubrication master batch further promotes, have simultaneously good inside and outside oilness, further technical scheme is: described lubricant comprises one or more in polyethylene wax, oxidized polyethlene wax, Poly Propylene Wax, ethene-vinyl acetate copolymer wax, paraffin, stearic acid, calcium stearate, Zinic stearas, the Magnesium Stearate.Above lubricant is according to the difference of polarity, and the durothermic difference of fusing point is applicable to different plastics varieties, and is interior lubricated also different separately with the degree of outer lubrication.According to plastics variety, they are carried out reasonably combined, various oilnesies effectively can be brought into play, produce synergy.
The present invention will realize smooth granulation because the lubricant addition is large, and technological temperature requires lower; For realizing low processing temperature, granulation forms master batch smoothly, and with plastics good consistency is arranged, and the fusing point of the resin carrier of selecting must be lower, and melting index is higher.Therefore the present invention also further technical scheme be: described vector resin comprises that fusing point is 70 ℃~105 ℃, one or more in the Low Density Polyethylene of melting index 15~80g/10min, Atactic Polypropelene, the ethene-vinyl acetate copolymer.
For forming effectively compound particle of each component Uniform Dispersion, the present invention adopts following manufacture method:
Step 1 coats the inorganic powder of sheet inorganic powder and sphere or almost spherical under the assistance of composite assistant by the high-speed mixer initial reaction;
Step 2, the inorganic powder adding extra-fine grinding equipment that tentatively coats is compound;
Step 3 drops into fully mixing in the high-speed mixer that is warmed up to assigned temperature in batches with inorganic powder with other feed composition;
Step 4, the material that step 3 is obtained uses the screw extruder granulation.
The present invention compares the auxiliary agents such as conventional lubricant or inorganic powder filler and has a clear superiority in.
The present invention cooperatively interacts by spherical, the inorganic powder of almost spherical tool oilness and the inorganic powder of sheet, can also bring into play certain oilness in the time of the enhancement of performance inorganic powder, improves processibility; By the reasonably combined of lubricant and use, form the lubricant effect of uniting with inorganic powder, plastic working can greatly be promoted, be particularly suitable at the low flow plastics and require plastics to have in the mobile forming process using; Itself has fillibility, and good oilness of while can satisfy plastics and further add weighting agent, improves the demand of loading level, does not need to add in addition lubricant again; Auxiliary by various auxiliary agents, functions such as making the present invention obtain simultaneously toughness reinforcing enhancing, increase rigidity, increase gloss, be weather-proof, anti-oxidant can be simplified plastic formula greatly greatly, reduces cost; The present invention is a kind of multi-functional, easily adds polymolecularity, high-compatibility, the cheaply lubricated master batch of plastics.
Below again foregoing of the present invention is described in further detail by specific embodiment, but this should be interpreted as that the scope of theme of the present invention only limits to this.Do not breaking away from the above-mentioned technological thought situation of the present invention, various replacements or change according to ordinary skill knowledge and customary means are made all should comprise within the scope of the invention.
Specific embodiment
Embodiment one
Prescription such as the table 1 of packing lubrication master batch in the present embodiment:
Table 1
Component | Quality (part) |
Inorganic powder | 100 |
Polyethylene wax | 25 |
Calcium stearate | 10 |
Low Density Polyethylene | 15 |
Silane coupling agent | 1 |
White dyes | 0.1 |
Oxidation inhibitor | 0.5 |
Proportioning such as the table 2 of inorganic powder in the present embodiment:
Table 2
Component | Quality (part) |
Talcum powder | 100 |
Mica | 20 |
Barium sulfate | 100 |
Embodiment one packing lubrication master batch is added blend granulation in the high-density polyethylene plastics that melting index is 0.08g/min by 15%.
Properties data such as the table 3 of the pure high density polyethylene(HDPE) granulation of embodiment one contrast:
Table 3
Project | Pure high density polyethylene(HDPE) | Embodiment one |
Melting index (g/10min) | 0.08 | 0.25 |
Tensile strength (MPa) | 28.0 | 33.2 |
Elongation at break (%) | 755 | 678 |
Modulus in flexure (MPa) | 1172 | 1256 |
Notched Izod impact strength (J/m) | 88.6 | 82.3 |
As can be seen from Table 3, add poly mobile increasing behind the packing lubrication master batch of the present invention, processibility is improved; Intensity increases to some extent, and rigidity increases; Toughness reduces slightly.
Embodiment two
Prescription such as the table 4 of filler parent granule in the present embodiment:
Table 4
Component | Quality (part) |
Inorganic powder | 100 |
Poly Propylene Wax | 50 |
Stearic acid | 15 |
Atactic Polypropelene | 20 |
Titanate coupling agent | 1.5 |
Oxidation inhibitor | 0.5 |
Toughner | 2 |
Proportioning such as the table 5 of inorganic powder in the present embodiment:
Table 5
Component | Quality (part) |
Talcum powder | 100 |
Polynite | 50 |
Titanium dioxide | 15 |
Barium sulfate | 85 |
Embodiment two packing lubrication master batches are added blend granulation in the acrylic plastering of filling 40% calcium carbonate by 5%, and the prescription of the pellet that it obtains is: 55% polypropylene+40% calcium carbonate+5% packing lubrication master batch.
Properties data such as the table 6 of embodiment two contrast virgin pps and the direct filled polypropylene granulation of 40% calcium carbonate:
Table 6
Project | Virgin pp | Polypropylene+40% calcium carbonate | Embodiment two |
Melting index (g/10min) | 3.0 | 1.2 | 2.8 |
Tensile strength (MPa) | 41.0 | 32.3 | 45.2 |
Elongation at break (%) | 670 | 264 | 502 |
Modulus in flexure (MPa) | 1720 | 1956 | 1898 |
Notched Izod impact strength (J/m) | 43 | 21.3 | 36.1 |
As can be seen from Table 6, the 40% calcium carbonate-filled polyacrylic flowability that adds behind the packing lubrication master batch of the present invention increases greatly, approaches with virgin pp, and processibility is improved; Mechanical property improves, and intensity, toughness all are improved, and particularly toughness is because the effect of toughner etc. in the packing lubrication master batch, be greatly improved, the problem of having avoided too much filler that plastics are become fragile makes production cost descend simultaneously, makes it have more the competitiveness in market.