1、 what is nano barium sulfate transparent masterbatch?
Nano barium sulfate transparent masterbatch is a kind of environmental economic masterbatch, with polyethylene as the carrier resin, nano scale barium sulphate powder and auxiliaries, after high temperature mixing, plasticizing, granulation and cooling.
Adding the masterbatch to HDPE, LDPE, LLDPE and so on: the addition of 20% does not affect the transparency of the film basically; it can reduce the production cost of the film, and improve the mechanical strength and rigidity of the film.
2、the market analysis of nano barium sulfate transparent Masterbatch
Since 2016, since the price of resin has fallen, and there has been a downward trend, resulting in the dismal market of barium sulfate masterbatch, so the quality requirements for barium sulfate masterbatch are further improved, the past experience has been unable to meet the requirements of the reality, all know that barium sulfate masterbatch has high profit, but because of barium sulfate. Most of the manufacturers do not know enough about flour.
The development trend of nano barium sulfate masterbatch is that the downstream customers need more and more transparent. This requires that the particle size of the nano barium sulfate powder is smaller and more pure, but the quality is good at present only two or three. In order to realize the non agglomeration of nano barium sulfate powder, the manufacturers also make their brains to develop their own unique surface. Processing technology.
At present, there are all kinds of equipment combinations of barium sulfate. No matter what machine combination is done, the filler content of padding is difficult to exceed 30%. Some blisters begin to have blisters with the amount of more than 20%, which can exceed 40% or 50%. Most of them are exaggerated.
3. Pain analysis of nano barium sulfate transparent masterbatch technology
(1) the quality of the barite ore is unstable
It is difficult to have pure barium sulphate ore. The raw material is difficult to control. Most powder manufacturers use barium carbonate and sulphuric acid to produce barium sulphate powder. This kind of barium powder has shortcomings of not fine particle size, agglomeration and excessive water content. These are the most fatal and difficult problems for downstream masterbatch manufacturers.
(2) barium sulfate powder has high moisture content and poor dispersibility.
Barium sulfate is a crystalline form of six angles. The intermediate moisture is very difficult to deal with. The adsorption force produced by the water causes the powder to be reunited, and it is difficult to scatter.
If the shear force of the high speed mixer is not enough, it will be very difficult to form a loose polymer, let alone deal with the water. This is why many factories do not use high speed mixer to negate the high agitator. It is necessary to specializes in the design of the blade, the baffle, the motor and so on, so as to speed up the impact of the powder in the mixer, increase the impact times, increase the impact strength and so on, and effectively deal with the bulk polymerization, water treatment and surface modification. This is the key to the quality of barium sulfate masterbatch.
Nanoscale barium sulfate powder is not in the form of original ecological form, most of which exist in the form of grape string. If no nano scale polymer surface treatment agent is not used, it is difficult to achieve perfect dispersing effect. Secondly, when the shear force of the high speed mixer is in accordance with the powder treatment and modification, it will inevitably lead to fast heating and high temperature. And so on. This requires testing the degree of temperature resistance of surface treatment dispersants, and it is inevitable that yellowing will occur if the temperature is not enough, which will affect the quality of products.
(3) there are misunderstandings in the selection of mother grain equipment
Barium sulfate powder is very viscous, and the twin screw extruder has dead angle, which is not conducive to product stability. Theoretically, it is more conducive to plasticizing. In fact, the barium sulfate masterbatch manufacturers do well in the mixer. Many manufacturers use a few thousand purpose barium sulphate powder, some say that the screw machine can also do, some say no high churning machine can also do well, I think all right, the key to the quality of the positioning.
4、the development direction of high-quality nano barium sulfate transparent masterbatch.
If you want to make a unique, competitive nano barium sulfate transparent masterbatch product, or to say that the quality of the product has an overwhelming advantage, the following three conditions are indispensable:
1、 nano scale barium sulfate powder (12000 mesh), purity of more than 98%.
2、the best combination of equipment: professional design of inorganic powder dedicated high-speed mixer + dense training machine + single screw granulation.
3、additives requirements: super dispersant - nanometer high efficiency surface treatment agent (specially for nano scale barium sulfate surface modification research and development). The addition amount is less, and the high filling is not easy to precipitate.
4、 process: the necessary hardware is the foundation, and the key to success is technology.
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