中文字幕一区二区三区四区,麻豆妇女,草操aV无码在线一,激情六月亭亭

Favorite |   GuestBook |   Contact Us  |   ENGLISH  |   CHINESE

Welcome DEZHOU?ZHONGCHUANG?COMPOSITE?MATERIAL?CO.,LTD HomePage!

DEZHOU?ZHONGCHUANG?COMPOSITE?MATERIAL?CO.,LTD
DEZHOU ZHONGCHUANG ENVIRON PROTECTION CO.,LTD

Serive Tel15806862636

Hot KeyWords: carbon fibre,Wind turbine blade,Auto parts,FRP mold,Vacuum forming auxiliary material
CONTACT US
Tel:+86-534-6037681
    DEZHOU?ZHONGCHUANG?COMPOSITE?MATERIAL?CO.,LTD
    Addr:NO.2,HONGRI?LOGISTICS?PARK,DEZHOU,SHANDONG
    DEZHOU ZHONGCHUANG ENVIRON PROTECTION CO.,LTD
    Addr:WORKSHOP 1,DEYI AVENUE,CHONGDE,DEZHOU,SHANDONG
    Mr:Manager Feng
    Mobi:15806862636
    Tel:+86-534-6037681
    Fax:+86-534-6037681
    Email:1144745498@qq.com
Current Location:Home » IndustryNews IndustryNews
Development history of polymer composites
Date:2019-10-19 Hits:

Since the 19th century, human beings began to use modified natural polymer materials. Cremated rubber and nitrocellulose plastics (Celluloid) are two typical examples.

After entering the 20th century, polymer materials have entered a stage of great development. First, in 1907, Leo bakeland invented phenolic plastics. In 1920 Hermann Staudinger put forward the concept of polymer and coined the word makromolekule. In the late 1920s, PVC began to be widely used. In the early 1930s, polystyrene began to be produced on a large scale. In the late 1930s, nylon began to be produced.

With the development of modernization of industrial enterprises, the scale and automation degree of equipment cluster are getting higher and higher. At the same time, the requirements for safe and continuous production of equipment are also getting higher and higher. The traditional equipment maintenance technology based on metal repair method is far from meeting the maintenance requirements for more high-tech equipment, which needs to be developed more for equipment prevention and on-site solution. New technologies and materials, including polymer composite materials, have emerged more new maintenance technologies and materials, so as to solve more problems and meet the maintenance requirements of new equipment operation environment.

After the great development of the 20th century, polymer materials have an important impact on the face of the whole world. Time magazine believes that plastic is the most important invention of the 20th century. Polymer materials have also had an important impact in the field of culture and human life style.

Serive Tel
15806862636
+86-534-6037681

WxChat

DEZHOU?ZHONGCHUANG?COMPOSITE?MATERIAL?CO.,LTD  
Address:NO.2,HONGRI?LOGISTICS?PARK,DEZHOU,SHANDONG
DEZHOU ZHONGCHUANG ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD
Address:WORKSHOP 1,DEYI AVENUE,CHONGDE,DEZHOU,SHANDONG
Tel:+86-534-6037681  Fax:+86-534-6037681  E-Mail:1144745498@qq.com
CopyRight©2014-2024 Update:2024-01-29 

操免费欧美大香蕉| 啪啪网免费AV| 欧美牲交黑粗硬大| free性爱麻豆| 骚少妇偷人| 鲁丝一鲁丝二鲁丝三| 国产丝袜久久| 少妇超碰碰精品| 亚洲av毛片网址| 日日噜噜夜夜狠狠视频无码| 厨房里我扒了公的内裤| 91综合区| av免费网站| 亚洲乱伦性爱| 久久免费视频七| 精品人福利电影| 亚洲人成绝费网站色WWW| 国产无码综合区| 久久夜夜操妹子| 欧美精品人妻一区二区三区| 欧美一级在线观看久| 美女啊啊啊啊1区| 九九久久社| 亚洲av电影天堂| 日日摸夜夜添夜夜添AV| 国产精品1800| 亚洲欧美日韩综合视频| 午夜视频一区二区三区| 亚洲日韩国产一区| 邪恶亚洲精品啪啪啪| 国产一级精品视频| 中文字幕人成乱码熟女香港| 日韩高清无码久久网| 电影天堂 电影| 国产精品久久国产精无码| 欧美老熟妇成人社区| 青青草原在线笫66| 国产午夜精品一区二区三区| 亚洲欧洲久久电影| 欧美色色吊丝| 亚洲无码高清无码视频|