News: Boertala formula silicone release agent formula manufacturer price Laiwu News
A large retention factor indicates good aging resistance and long service life. In order to ensure the aging resistance of the material, the retention factor must generally be ≥.6.3. The impermeability reflects the waterproof performance of the material. To prevent efflorescence and water spots, stone must keep the water out of the stone for a long time. According to the practice for more than one year, 5mm water column, 24 hours impermeability, can meet the requirements. , The construction performance of the back glue The back glue must go through construction to become the final product. In addition to the technical indicators, the construction performance is also very important. It is required that the adhesive ingredients are easy to mix evenly; the mixed material can be operated for no less than 2 hours, and the operating time is too short, and the workers start to solidify before the operation, which will make the film quality poor, reduce the performance, and cause waste; The hand feel is moderate during batch scraping. If it is too viscous, the operator will consume too much physical strength, which is not conducive to long-term stable operation and affect the quality; too thin, and the film thickness is too thin, which will affect the waterproof effect; the drying time is related to the production efficiency.
The main reason for the problem of paint bulging or falling off from the base layer after film formation:
Rubber and plastic products are molded and processed in the mold. The rubber and plastic materials contact the mold surface. There may be a certain frictional resistance when the rubber and plastic products are peeled from the mold due to micro-defects such as the uneven working surface of the mold.
In the process of injection or extrusion of rubber and plastics, negative pressure is often formed between the rubber and plastic materials and the mold, or the two are bonded due to physical adsorption or chemical bonding, which results in the rubber and plastic products being removed from the mold after molding. Difficult to peel. In order to weaken the adsorption or bonding between the product and the mold, an additive that can form an effective isolation film-a mold release agent is often used. The release agent is an interface film layer used on the surfaces of two objects that are easy to adhere to each other to form an isolation between the adherend and the adherend, so that it is easy to peel, making the product demold easier and more convenient. There are many kinds of basic materials that can be used as mold release agents. Commonly used mold release agents include inorganic, organic, and polymer types.
Commonly used inorganic release agents include graphite powder, talc powder, mica powder, molybdenum disulfide and other powders. Commonly used organic release agents include fatty acids, fatty acid soaps, various waxes, glycols, etc. Molding agent also has the function of lubricant. Polymer mold release agents mainly include polyvinyl alcohol, cellulose acetate, organic fluoropolymer and silicone polymer, etc. Among them, silicone polymer is the most suitable mold release agent
News: Boertala formula silicone release agent formula manufacturer price Laiwu News
Nowadays, when people decorate the stone, they usually make the decision on their own. However, since the owners have few opportunities to get in touch with this aspect, they often spend a lot of money but fail to buy their favorite products. This article is just a little suggestion for you to choose natural stone and artificial stone. At first glance, the method of purchasing natural stone is to observe the surface structure of the stone with the naked eye. The surface material has a uniform structure, and no cracks, blisters, heterochromatic spots, stains and depressions are the top grade of the stone. On the contrary, the appearance effect and quality are slightly worse. In addition, attention should be paid to whether there are micro cracks or missing edges and corners in the stone. The cracks may cause the fracture of the stone. The second quantity is the size of the stone, so as not to affect the splicing, or cause the patterns, patterns, and lines after the splicing to be deformed, and affect the decorative effect.
1. Management of the grassroots: the surface of the grassroots must be cleaned carefully. It is required to be solid and flat without sand, and basically dry; the slope of the base layer meets the design requirements, and no water is allowed to accumulate.
Silicone release agent is made from organosiloxane as raw material. Its advantages are good heat resistance, moderate surface tension, easy to form a uniform isolation film, long release life, non-toxic, good gloss, and no affinity with resin. It is suitable and widely used in various occasions such as plastics and rubber. The disadvantage is that there is a layer of oily surface on the surface of the product after demolding, and the surface must be cleaned after secondary processing. Commonly used are silicone oil, silicone rubber, emulsified silicone oil and silicone grease. Silicone mold release agents are currently the mainstream products in the mid-range market of rubber and plastic mold release agents. They are widely used in the processing of polyurethane, rubber, polyethylene and polyvinyl chloride resins.
Dow Corning, Japan Orient Oil Industry Co., Ltd. and Shin-Etsu's silicone release agents are mainly sold abroad. There are many domestic factories producing silicone release agents, but their scale is relatively small.
News: Boertala formula silicone release agent formula manufacturer price Laiwu News
Refractory board and anti-folder countertops avoid long-term immersion in water to prevent the countertops from being deformed when they are glued. It is necessary to prevent the bleach and scale in the water from making the artificial stone countertops lighter and affecting the appearance. Strictly prevent strong chemicals from contacting the countertop, such as paint remover, metal cleaner, stove cleaner, methylene chloride, (nail polish remover), strong acid cleaner, etc. If you accidentally come into contact with the above items, immediately wash the surface with plenty of soapy water. If the nail polish is stained, wipe it with a non-contained cleaning agent (such as alcohol), and then rinse it with water. Do not allow heavy or sharp objects to directly impact the surface; oversized or overweight utensils should not be placed on the table for a long time; nor should they be washed with cold water and immediately scalded with boiling water.
Expansion agent classification: 1 Calcium sulphoaluminate concrete expansion agent refers to a concrete expansion agent that produces ettringite after being mixed with cement and water through hydration reaction. 2 Calcium oxide concrete expansion agent refers to the concrete expansion agent that generates ettringite and calcium hydroxide after being mixed with cement and water through hydration reaction. 3 Calcium oxide concrete expansion agent refers to the concrete expansion agent that generates calcium hydroxide after being mixed with cement and water through hydration reaction.
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