国产寡妇婬乱精品视频,国产精品久久无码小视频,国产精品成人AAAA在线,涩涩成人黄色大片在线免费看,丰满人妻被黑人XXXX一区二区
400-807-5707
Basic knowledge of artificial stone 2018-8-10 Click:


1. Definition of artificial stone:

Artificial stone, scientific name polymer mineral filled composite solid surface material, English name "SOLIDSURFACE", literally translated as "hard surface material". The so-called solid surface material refers to the homogeneous solid material with dense internal structure and uniform surface. The original technology is derived from DuPont. DuPont artificial stone is based on polymethyl methacrylate MMA (commonly known as "acrylic" PMMA is formed by free radical polymerization of methyl methacrylate) and aluminum hydroxide as the main components. The products produced have high surface hardness, Good texture, non-toxic, non-radioactive, non-sticky oil, non-staining, anti-bacterial and anti-mildew, impact resistance, easy maintenance, seamless splicing, arbitrary shape and other advantages, but the technology is extremely complicated, the cost of raw materials is high, and the equipment investment is huge.
In 1969, DuPont of the United States developed the first solid surface material, CORIAN, which created a new solid surface material industry in the world. The actual large-scale use of artificial stone began in the 1980s. In 1990, CORIAN entered the Chinese market and was the first solid surface material brand to be marketed and applied in the Chinese market.
Later, Wellstone replaced polymethyl methacrylate with unsaturated resin to produce artificial stones, which drastically reduced costs. Later, this technology was introduced to China, and production began in China in 1996, and more methods of producing artificial stones were rapidly developed in our country.
Different from products whose structure determines performance, the use performance of artificial stone is determined by various conditions such as the composition and proportion of raw materials, production equipment, and technology. Among them, raw materials are the basis for determining its quality and the main factor determining the cost of products. .

2. What are the materials that make up artificial stone?
Resin: Resin is the most important base material for artificial stone. Generally speaking, the properties of resin determine the final performance of artificial stone. The resins currently used to make artificial stones are generally ortho-benzene, m-benzene, neopentyl glycol, m-benzene / neopentyl glycol, vinyl ester, and acrylic.
Filling materials: Artificial stone filling materials mainly include: aluminum hydroxide, heavy calcium carbonate, calcium hydrogen phosphate, natural marble powder, inorganic granite stone powder, and swatch particles. Its main functions are: one is to fill the volume; the other is to enhance the texture of the artificial stone; the third is to enhance the mechanical properties of the artificial stone; the fourth is to act as a flame retardant.
Pigments: The role of pigments in artificial stone is to mix and match varieties of colors to make them colorful. In theory, any color can be formulated through various pigments.
Accelerators and curing agents: Accelerators and curing agents are essential additives for the production of artificial stone, which can control the gel time of the board within a predetermined range.
Other auxiliaries: The resin is a polymer polymer material. Properly adding some auxiliaries can improve its process performance, improve production efficiency, improve artificial stone properties, and extend its life.
Products Tel Navigation
日韩AV电影在线免费观看 | 蜜桃BBB蜜桃BBB蜜桃BBB | 乐播A V一区二区三区在线 | 成人人人人人欧美片做爰 | 无码人妻精品一区二区免费视频 | 丝袜 亚洲 另类 欧美 重口 | 內射精品少妇极品嘘嘘播放 | 亚洲精品区一区二区三区水户香奈 | 蜜桃传媒AV免费观看麻豆下载 | 欧美必出精品在线观看 | 四川BBB又粗又硬又大 | 无码精品A∨极品嫩模蜜臂 国产一a一片一级一片按摩 | 后进极品白嫩翘臀在线视频 | 91亚洲精品久久久蜜桃 借种 | 少妇搡BBBB搡BBB搡毛茸茸 | 无码成人精品区一级毛片 | 少妇搡bbbb搡bbb搡bbb | 婷婷涩嫩草鲁丝久久午夜精品 | 无码经典中文国产凹凸 | 欧美最爽乱婬A片黑人 | www.小黄书网页版入口 | 午夜成人短视频在线观看 | 精品一级毛片A久久久久 | 免费性爱视频手机观看 | 广州老熟女一88AV | 国产精品激烈高潮白浆 | 男女在线搞黄色国产 | AV网站免费在线观看 | 国产裸体免费无遮挡香港特辑 | 久久久久久亚洲AV成人网站 | 波多野50部无码喷潮影院 | 人妻丰满精品一区二区三 | 亚洲乱码一区在线 | 99久久久无码国产精品老牛影视 | 精品无码人妻一区二区三区视频 | www.国产黄色视频 | 99久久婷婷国产一区二区三区 | 囯产精品久久久久久久久在饯观看 | 久久一区二区三区精品 | 午夜大尺度色无码专区 | 欧性猛交ⅩXXX乱大交 |