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Method for preparing mother material from nano grade inorganic powder material
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An inorganic powder, nano-level technology is applied in the field of preparing plastic masterbatch from nano-level inorganic powder, which can solve the problems of performance degradation, affecting the quality and application effect of the masterbatch, and decreasing the tensile strength and elongation at break of profiles. Achieve the effect of improving production efficiency
Inactive Publication Date: 2004-07-21
BEIJING UNIV OF CHEM TECH
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The increase in mixing times when preparing nano-calcium carbonate masterbatch will also affect its performance. When it is used to produce PVC door and window profiles, the tensile strength and elongation at break of the profiles are both reduced by 26%.
Repeated mixing will reduce its performance and affect the quality and application effect of the masterbatch
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Embodiment 1
[0013] 1. Composition of nano calcium carbonate masterbatch (weight%):
[0029] 2. The melting and compression temperature is 110-120℃.
[0030] This masterbatch was used to prepare polyvinyl chloride composite material (the masterbatch accounted for 8% by weight), and the electron micrograph of the sample (as shown in the figure) showed that the nano-calcium carbonate has a good dispersibility in the polyvinyl chloride body.
Embodiment 3
[0032] 1. Composition of nano calcium carbonate masterbatch (weight%):
[0039] 2. The melting and compression temperature is 120-140℃.
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Abstract
In method for preparing mother material, nano inorganic powder material, carrier resin and working adjuvant are used as raw material through extrusion process is characterized by that the inorganic powder material is 1-100 nano powder material, its weight is 50%-80% of that of mother material, the weight of low melting point working adjuvant is 12%-41% of that of mother material, and the weight of other adjuvant is 0-7% of that of mother material, and the weight of carrier resin is 8%-30% of that of mother material. Before extrusion the above0mentioned raw materials are pressed into the flake block in press equipment under the condition of greater than melting temp. of low melting point working adjuvant, then undergone the process of breaking treatment. said low melting point working adjuvant is at least one of low molecular weight polystyrene, polyethylene wax, oxidative polyethylene wax or stearic acid. Said method can obviously raise feeding speed for extrusion process, and can raise production efficiency.
Description
(1) Technical field [0001] The invention relates to a method for preparing a plastic masterbatch from nano-level inorganic powder, in particular to a method for preparing a masterbatch by extruding nano-level inorganic powder with carrier resin and processing aids as raw materials. (2) Background technology [0002] The technology of preparing composite materials by extrusion processing of inorganic powder and matrix resin has been very mature and has been widely used. In the preparation of composite materials, inorganic powders are often prepared in advance into master batches and then added to the composite materials. The masterbatch preparation method of common micron-sized powders usually involves mixing or kneading the micron-sized powders, additives and carrier resins, and then adding them to the extruder from a hopper, and then preparing them into a masterbatch through extrusion processing. In order to solve the problem of difficulty in powder feeding, there is also a meth...
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