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
3d动漫精品啪啪一区二区免费 | 精品一区免费不卡 | 波多野59部无码喷潮 | 永久成人无码激情视频免费 | 欧美午夜视频在线观看免费版 | 成人黃色A片三級免费 | 一级A片色情大片视频我和少妇 | 精品无人区无码乱码毛片国产 | 91人人妻人人爱人人澡人人爽 | 国产传媒在线观看视频 | 浪潮av蜜臀色欲av无码 | 97人妻精品一区二区三区四区五区 | 国产精品国产三级国产AⅤ9色 | 无套内谢88AV免费看 | 农村嫖妓一区二区三区 | 艳妇乳肉豪妇荡乳在线播放 | 狂野欧美性猛交XXⅩ大乱3超A | 国产农村肥熟妇女A片 | 精品人妻无码一区二区三区蜜臀 | 中文字幕av亚洲精品一部二部 | 色婷婷五月色综合AⅤ色欲 蜜臀av粉嫩av色欲av | 国产盗摄女厕一区二区三区 | 中文字幕欧美人妻精品一区蜜臀 | 久久久久久久网站 | 精品+成人+无码夜夜看爽爽 | 亚洲av电影在线观看 | 国产少妇丝袜脚的味道av | 中文字幕乱码第三页 | 午夜福利理论片在线播放按摩院 | 波多野结衣成人电影 | 精品人妻无码一区二区三区百度 | 可以免费观看的一级毛片 | 白丝无内自慰喷水网站 | 国产91 丝袜在线播放导 | 亚洲の无码国产の无码步美 | 精品国产91久久久红豆影视 | 国产日产欧产美韩系列麻豆免费 | 亚洲AV无码高清在线观看 | 久久久又黄又爽免费观看下载 | 亚洲AV中文无码乱人 | 欧美激情精品久久久久久变态 |