塑钢窗的优点是管理运营成本低，价格有优势，并且耐腐蚀。被引入中国市场后，其核心的添加剂和配方仍掌握在国外企业手中，价格较高，随着国内产业竞争的不断加剧，一些企业为了降低成本，开始减少甚至取消了各种重要添加剂，减小型材壁厚，开发推拉窗等五金成本低的新产品。这种降低标准、降低配置的现象，最后竟演化成为全行业不可逆转的恶果---塑钢窗的缺点便集中暴露出来，并成为全行业普遍存在的现象，比如黄变，日久会变脆，并引发了多起安全事故。1999年建设部发文，高层建筑禁止使用塑钢窗，塑钢门窗市场迅速萎靡。塑钢门窗品质的下
型线 流水槽模具 景观石 检查井钢模具 保定通风管道 隔离墩模具 保定保洁公司降，将其推进死巷，于是铝合金窗回光返照。
经历了三次变革，门窗行业对铝合金和塑钢有了更为深刻的认识。为了解决隔热的问题，我国的科学家发明了断桥铝合金。原理是利用PA66尼龙将室内外两层铝合金既隔开又紧密连接成一个整体，构成一种新的隔热型的铝型材。但在使用过程中，出现了很多问题，后来又从德国，法国和比利时进口强力尼龙等材料。
The advantages of plastic steel windows are low management, low cost,
superior price and corrosion resistance. After being introduced into the
Chinese market, the core additives and formulas are still in the hands
of foreign enterprises, and the price is high. With the increasing
competition of domestic industry, some enterprises, in order to reduce
the cost, begin to reduce or even cancel all kinds of important
additives, reduce the wall thickness of small materials, open and push
and pull windows and other new products with low hardware costs. . The
phenomenon of reducing the standard and reducing the configuration has
finally evolved into an irreversible consequence of the whole industry -
the shortcomings of the plastic steel window are exposed and become a
common phenomenon in the whole industry, such as the change of yellow,
and it will become crisp and cause a number of safety accidents. In
1999, the Ministry of Construction issued a document that prohibit the
use of plastic steel windows in high-rise buildings, and the market of
plastic steel doors and windows is rapidly flagging. The quality of
plastic steel doors and windows is reduced, pushing it into the blind
alley, so the aluminum alloy windows return to light. After three
changes, the doors and windows industry has a deeper understanding of
aluminum alloy and plastic steel. In order to solve the problem of heat
insulation, our scientists invented the broken bridge aluminum alloy.
The principle is to use PA66 nylon to separate and tightly connect the
two layers of aluminum alloy inside and outside, and form a new heat
insulating aluminum profile. But there were many problems in the process
of using, and later imported strong nylon and other materials from
Germany, France and Belgium.
