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Talc is an aqueous magnesium silicate mineral, soft in quality, with good electrical insulation, heat resistance, chemical stability, lubricity, oil absorption, hiding power and mechanical processing properties and other characteristics, widely used in cosmetics, paints and coatings, papermaking, plastics, cables, ceramics, waterproof layer materials and other fields.
Today, the powder technology network will share the "gb/t 15342-2012 talc powder", in order to have a clearer understanding of the classification, use and performance index requirements of talc.
《gb/t 15342-2012 Talc》
1. Scope
This standard specifies the terms and definitions, classification and marking, requirements, test methods, inspection rules, and marking, packaging, transportation, and storage of talc.
This standard applies to ten talc powder products made of naturally produced talc machined.
2. Terms and Definitions
Talc (talcum)
An aqueous magnesium silicate mineral with a soft and creamy texture. The theoretical chemical formula is mg3(si4o10)(oh)2 or 3mgo·3sio2·h2o.
Talc powder
Talc ore is a powder product of a certain fineness that is mechanically processed.
Grinded talc powder general talc powder
With the test sieve screening, the test sieve pore diameter in the range of 1000 μm-38 μm, the pass rate of more than 90% talc.
Micronized talc powder
With instrument side fixation, talc with a particle size of less than 30 μm with a cumulative content of more than 90%.
Ultrafine particle size talc powder
Measured by the instrument, the cumulative content of talc with a particle size of less than 10 μm is more than 90%.
3. Classification
Product classification: Talc powder is divided into three categories: ground talc, micro talc and ultra-fine talc according to the size of its crushing particle size.
Product varieties: Talc is divided into 9 varieties according to its use, as detailed in the following table.
4. Requirements
5. Detection method
outline
Source: Powder Technology Network