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Selective machine-directional stretching of a precombined elastic web of varying web width by speed differential stretching
专利权人:
Concepts for Success (C4S)
发明人:
Christoph Schmitz
申请号:
GB201419705
公开号:
GB2532027A
申请日:
2014.11.05
申请国别(地区):
GB
年份:
2016
代理人:
摘要:
A web comprises a non-elastic fibrous sub-layer and an elastic sub-layer which are pre-combined. In a repeating sequence defining a pitch length 130 along the lengthwise machine direction of the web it has a cross-machine direction width which in a first region 135 is narrower than in a second region132, 138. The web is stretched in a stretching gap 140 between a second roll 120 operated a constant out-feed speed and a first roll 110 operated a constant speed lower than that of the second roll or a speed. Alternatively, the first roll may be operated at a speed which is oscillating between: a lower speed and a speed equal to the outfeed speed, or; a lower speed and a higher speed than the outfeed speed such that the integral of the first roll speed over a pitch length is less than the corresponding integral of the speed of the second roll. The web is stretched more in the narrow regions 135 than in the wider regions 132, 138 The web may be used to produce hygiene articles such as baby diapers or adult incontinence articles.
来源网站:
中国工程科技知识中心
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