欧美人与禽zoz0性伦交,久久久久人妻精品一区蜜桃,末成年女av片一区二区,亚洲中文字幕无码永久在线不卡

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
成人美女黄网站色大免费的| 人妻精品久久久久中文字幕| 99久久久无码国产精品古装| 99亚洲精品卡2卡三卡4卡2卡| 亚洲av无码成h人动漫无遮挡| 亚洲精品久久久久69影院| 久久99精品久久久久久婷婷2021| 亚洲成a人v影院色老汉影院| 丰满少妇呻吟高潮经历| 亚洲全部无码中文字幕| 丰满岳乱妇一区二区三区| 久久国产精品免费一区| 国产精品国产三级国产av主播| 国产国拍精品av在线观看按摩| 亚洲精品久久久久久久蜜桃| 成人欧美一区二区三区在线| 亚洲乱码日产精品bd在线观看| 成人无码a区在线观看视频| 亚洲 自拍 另类小说综合图区| 国产精品久久无码一区二区三区网| 亚洲ⅴ国产v天堂a无码二区| 免费看无码毛视频成片| 性色av免费观看| 麻豆成人国产亚洲精品a区| 欧美丰满熟妇bbbbbb百度| 免费两性的视频网站| 99国产精品久久久蜜芽 | 苍井空张开腿实干12次| 亚洲欧洲日韩综合久久| 免费看男女做爰爽爽视频| 国产成人亚洲综合无码| 狼人无码精华av午夜精品| 成人三级a视频在线观看| 中文毛片无遮挡高潮免费| 国产超高清麻豆精品传媒麻豆精品| 同性男男黄gay片免费| 国产精品18久久久久久欧美| 美女18禁一区二区三区视频| 日韩一区二区三区无码免费视频| 亚洲熟妇丰满大屁股熟妇| 热久久99热精品首页|