日日噜一噜日本不卡乱码日韩,久久久精品国产亚洲av一二三,一区二区三区中文字幕免费,香蕉女久久久久久久久久

Add and update a little knowledge of PVC pipe fitting
欄目:Industry News 發(fā)布時間:2021-06-03 15:19
PVC is the worlds second-largest general-purpose synthetic resin material. It has excellent flame resistance, abrasion resistance, chemical resistance, comprehensive mechanical properties, product transparency, electrical insulation, and eas...
PVC is the world's second-largest general-purpose synthetic resin material. It has excellent flame resistance, abrasion resistance, chemical resistance, comprehensive mechanical properties, product transparency, electrical insulation, and easy processing.
At present, PVC has become one of the most widely used plastics in the fields of application. It is widely used in industry, construction, agriculture, daily life, packaging, electricity, public utilities and other fields. It is compatible with polyethylene (PE) and polypropylene (PP). , Polystyrene (PS) and ABS are collectively referred to as the five general-purpose resins.
In recent years, global PVC production capacity has continued to grow. According to IHS data, in 2018, the global PVC production capacity was 55.4 million tons, and in 2019, the global PVC production capacity was about 57.17 million tons.

PVC pipe: also known as polyvinyl chloride pipe, is made of polyvinyl chloride resin, stabilizer, lubricant, etc. and then extruded by hot pressing. It is the first plastic pipe to be developed and applied. PVC pipe has strong corrosion resistance, easy bonding, low price, and hard texture. However, due to the seepage of PVC monomer and additives, it is only suitable for water supply systems whose conveying temperature does not exceed 45℃. Plastic pipes are used for drainage, waste water, chemicals, heating and cooling fluids, food, ultra-pure liquids, mud, gas, compressed air and vacuum systems.
It is a kind of synthetic material that is well-loved, popular and widely used in the world today. Its global usage ranks second among various synthetic materials. According to statistics, in 1995 alone, the production of PVC in Europe was about 5 million tons, while its consumption was 5.3 million tons. In Germany, the production and consumption of PVC averaged 1.4 million tons.

PVC can be divided into soft PVC and hard PVC. Hard PVC accounts for about 2/3 of the market, and soft PVC accounts for 1/3. Soft PVC is generally used for floors, ceilings and leather surfaces, but because soft PVC contains plasticizers (this is also the difference between soft PVC and hard PVC), its physical properties are poor (such as water pipes that need to withstand certain water pressure, soft PVC Not suitable for use), so its scope of use is limited. Rigid PVC does not contain plasticizers, so it is easy to shape and has good physical properties, so it has great development and application value. In the production process of PVC materials, several additives, such as stabilizers, plasticizers, etc. are bound to be added. If all environmental additives are used, then PVC pipes are also non-toxic, tasteless and environmentally friendly products.

Advantages of PVC pipes and PVC pipe fittings:
1. It has good tensile and compressive strength: but its flexibility is not as good as other plastic pipes.

2. Low fluid resistance: The wall of PVC-U pipe is very smooth, and the resistance to fluid is very small. Its roughness coefficient is only 0.009. Its water delivery capacity can be 20% higher than that of cast iron pipes of the same diameter and 40% higher than that of concrete pipes. %.

3. Excellent corrosion resistance and chemical resistance: PVC-U pipes have excellent acid resistance, alkali resistance, and corrosion resistance, and are not affected by damp water and soil pH. No anti-corrosion treatment is required when laying pipes.

4. It has good water tightness: the installation of PVC-U pipes, regardless of whether it is connected by bonding or rubber ring, has good water tightness.

5. Anti-bite: PVC-U tube is not a source of nutrition, so it will not be corroded by rodents. According to a test conducted by the National Sanitation Foundation in Michigan, rats will not bite PVC-U pipes.

Wuxi Jiahong Plastic Technology Co., Ltd. can dye and process ABS, PS, PC, PC/ABS, PP and other engineering plastic particles according to customer requirements; various filled, flame retardant, reinforced modified ABS, PP, PC/ABS, PA and other engineering plastics Particles; various automotive special materials such as door panels, bumpers, instrument panels, engine covers, and lights.

Wuxi Jiahong Plastic Technology Co., Ltd. has nearly 30 years of experience in R&D and pelletizing production of PVC pellets, and experience in R&D and production of modified engineering plastics; the professional technical service team can provide customers with one-stop modified plastic system solutions. If you want to know more about the product, please log in to our official website: www. js-plastics. com, consult online customer service or call the hotline. Landline: 0510-68755207 Mobile: 15190220696, we will serve you wholeheartedly.
被几个大屌老外轮操| 少妇勾搭外卖员在线观看| 从后面狠狠的干白嫩少妇| 国产一级第一级毛片| 中文字幕一区二区日韩精品蜜臂| 波多野结衣福利视频| 我要操死你逼视频| 美女骚逼被操出白浆| 插我舔内射18免费视频| 国产女明星一级毛片| 大鸡巴抽插小骚逼视频免费| 美女被大屌操大骚逼| 伊人久久丁香色婷婷啪啪| 国产高清第一区第二区第一页| 校花内射国产麻豆欧美一区| 操国产骚逼逼逼逼逼逼逼| 骚逼被狂插视频教程| 爱爱视频小抽插动漫| 欧美精品日韩精品中文字幕| 青娱乐欧美性爱视频| 亚洲免费福利视频| 操女人逼逼骚逼逼| 鸡巴抽插逼逼视频| 想被操在线啊啊啊啊| 精品一区二区三区成人免费视频| 90岁肥老奶奶毛毛外套| 日韩美女一区二区三区香蕉视频| 亚洲欧洲日本精品| 亚洲国产综合精品 在线 一区| 大鸡巴射在穴穴里的视频| 中文字幕在线精品的视频| 日本高清不卡一区二区三区| 91麻豆精品福利在线观看| 美女逼男逼小穴小骚下载| 大鸡巴干小逼视频| 日韩美女一区二区三区香蕉视频| 欧美黄色三级成人小视频| 小骚货舔小骚逼视频| 中文字幕在线资源第一页| 亚洲av一区二区在线看| 亚洲国产无线码在线|