According to the different production methods of calcium carbonate, calcium carbonate can be divided into Heavy Calcium Carbonate, light calcium carbonate, colloidal calcium carbonate and crystalline calcium carbonate. White solid, tasteless and odorless. There are two forms of amorphous and crystalline. The crystal type can be divided into orthorhombic crystal system and hexagonal crystal system, which are columnar or diamond-shaped.
Calcium carbonate is widely used in filling polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), acrylonitrile butadiene-styrene copolymer (ABS) and other resins. The addition of calcium carbonate has a certain effect on improving certain properties of plastic products and expanding their application range. In plastic processing, they can reduce resin shrinkage, improve rheology, and control viscosity. It can also play the following roles: Calcium Carbonate,Calcium Carbonate, Light Calcium Carbonate Henan Shunbang Chemical Industry CO.,Ltd , https://www.sbcpe.com
At present, the cleanliness, germination rate and moisture of seeds are generally operated by professional measuring instruments. The traditional measuring methods have been seldom used. The traditional measuring methods are simple but can not be accurately measured. Judgment, when performing various types of tests, it takes a certain amount of measurements and judgments. Generally, one thousand seeds are taken for measurement. At this time, an automatic photoelectric counting instrument is used to help him. We quickly and accurately carry out counting and reduce the wastage of manpower and material resources. When purchasing, we personally recommend the SLY-C model to measure the clarity and moisture content of the seed after counting. When measuring the degree of clarity, if you only measure the degree of clarity, you can use a blower type, but if you want to increase the degree of clarity, you are advised not to use it. use it.
The measurement of seed moisture content is generally measured using 1000-grain weight. The seed moisture content has its own specific index, and different seed moisture content requirements are not the same. The seed germination rate measurement is performed using samples that are already satisfied in terms of cleanliness and moisture content. The environment in which the seed germinates must be performed in an environment suitable to him, and in the environment in nature because it can Denaturation is not suitable for the test of seed germination rate. Usually, the seed germination box is used for measurement. The environment inside is an environment that can be regulated and can be set according to different seeds.
The detection of seed quality is a must. Through the detection of seed quality, certain guarantees can be made for future germination of seeds and future crop yields.
(1) Improve the dimensional stability of plastic products;
(2) Improve the hardness and rigidity of plastic products;
(3) Improve plastic processing performance;
(4) Improve the heat resistance of plastic products;
(5) Improve the astigmatism of plastics;
(6) It can make the product have some special properties;
(7) Reduce the cost of plastic products.
The quality of seeds necessary for quality inspection is the basis for improving the output, quality, and efficiency of new crop products. It is the life of the seed companies and an important guarantee for the development of agricultural production. The national standard GB4404.1-2008 stipulates the crop quality standards. The standard is based on the unified species plan index as the basis for dividing the seed quality level; any one of the items of the degree of purity, germination rate, and moisture content is unqualified is the unqualified seed.