ISSN:0193-7197    

DOI:10.1002/vnl.730050202

出版商:Society of Plastics Engineers, Inc.    

年代:1983

数据来源: WILEY

摘要:

AbstractIn the early 1960s, vinyl house siding was first commercialized. The colors were pastels and included white, green, yellow, and gray. All siding tended to bleach and fade (oxidize) to an extent where medium and dark colors were unacceptable, since the fading is more noticeable in deeper colors. All the early siding was made from cubes on single‐screw extruders. Powder compounds were first introduced in the late 1960s, as was twin‐screw extrusion. At the same time higher processing temperatures were used on, both twin‐ and single‐screw extruders. That led to a well‐fused and tougher product. Formulation changes reduced bleaching and fading and permitted such medium‐depth colors as tan, gold, beige, blue, and olive.This technology allowed rapid growth in the vinyl siding industry in the late 1970s. Surface distortion (oil canning) was recognized as a potential problem with the early gray color and recognized as a major problem with dark colors; it was resolved only by understanding the fundamental principles involved. Another major problem was the fading in dark colors and here again extensive research into the principles of weathering led to the use of a thin, highly weatherable capping as a cost‐effective solution.For the future, many technical developments can be expected in this rapidly growing market. However, judging by the occasional withdrawal of a formulation from the market, and by an occasional homeowner complaint, present performance in several properties must be judged as just adequate. For this market to continue its rapid growth, future performance should be better than today's. This can be accomplished without hurting economics by careful understanding of all parameters involved. Formulation changes will allow better performance. Standards must be raised to control product performance, especially surface distortion and color stability in darker colors, and to insure retention of physical properties after long‐

ISSN:0193-7197    

DOI:10.1002/vnl.730050203

出版商:Society of Plastics Engineers, Inc.    

年代:1983

数据来源: WILEY

ISSN:0193-7197    

DOI:10.1002/vnl.730050204

出版商:Society of Plastics Engineers, Inc.    

年代:1983

数据来源: WILEY

ISSN:0193-7197    

DOI:10.1002/vnl.730050205

出版商:Society of Plastics Engineers, Inc.    

年代:1983

数据来源: WILEY

ISSN:0193-7197    

DOI:10.1002/vnl.730050206

出版商:Society of Plastics Engineers, Inc.    

年代:1983

数据来源: WILEY

ISSN:0193-7197    

DOI:10.1002/vnl.730050207

出版商:Society of Plastics Engineers, Inc.    

年代:1983

数据来源: WILEY

ISSN:0193-7197    

DOI:10.1002/vnl.730050208

出版商:Society of Plastics Engineers, Inc.    

年代:1983

数据来源: WILEY

ISSN:0193-7197    

DOI:10.1002/vnl.730050209

出版商:Society of Plastics Engineers, Inc.    

年代:1983

数据来源: WILEY

ISSN:0193-7197    

DOI:10.1002/vnl.730050210

出版商:Society of Plastics Engineers, Inc.    

年代:1983

数据来源: WILEY

ISSN:0193-7197    

DOI:10.1002/vnl.730050211

出版商:Society of Plastics Engineers, Inc.    

年代:1983

数据来源: WILEY