Tension is also referred to as seam shrinkage or thread relaxation pucker. As it attempts to recover its original length, it gathers up the seam, causing the pucker, which cannot be immediately seen and may be noticeable at a later stage. Tension pucker is caused while sewing with too much tension, thereby causing a stretch in the thread. Most puckering is the result of a combination of many causes, which are explained in this bulletin post, along with tests to identify them and their corresponding solutions. There are, however, other contributing factors which include fabric structure, seam construction, thread/needle size and feeding problems – both mechanical and operator induced. Since the thread is an essential part of any seam, it is often blamed for creating seam pucker. It is one of the most aggravating and persistent problems encountered while making fine seams in woven or knitted fabrics.
The merger of the 5Gi standard into 3GPP, enables a single common specification going forward, as well as creating a single radio access proposal for the ‘IMT.2020’ 5G family of standards (ITU-R).Tips to Avoid Puckering What is seam puckering? In turn, TSDSI has committed to the merger of 5Gi into 3GPP along with a roadmap of pursuing merged 3GPP 5G specifications in India with no further 5Gi updates in ITU-R. In addition, the objectives of the RAN WG4-led Rel-17 work item along with a recent way forward for the same project have been amended. With broad support from many TSDSI member companies, as well as global cellular vendors and multiple operators, TSG RAN contribution ( RP-213532) outlines the framework and steps to be taken to facilitate the intended merger.įrom the 3GPP side, two Rel-17 Change Requests (CRs) clarifying the specification of the Pi/2-BPSK modulation scheme - to support low peak-to-average-power ratio (PAPR) transmissions – have been technically endorsed.
A plan of action was agreed at the 3GPP TSG RAN plenary (RAN#94-e) this week, to allow the merger of 5Gi into 5G, with specific milestones set for both 3GPP and TSDSI.
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