Process for thermally bonding plastic tubes
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United States of America Patent
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-
Jan 13, 1987
Grant Date -
N/A
app pub date -
Feb 19, 1985
filing date -
Feb 19, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The process for thermally bonding plastics is capable of bonding two tubings over a very small circumferential overlap area and the bond formed thereby, is able to withstand high peel and shear forces. The method includes the steps of: providing a stepped mandrel having a smaller diameter portion and a larger diameter portion; sliding a first tubing over the smaller portion; sliding a second tubing over the larger portion and slightly over the first tubing to establish an overlapping area to be bonded; sliding a shrink tubing over the second tubing to a position over the overlapping area; placing the overlapping area in a die; and heating the die a sufficient amount for a sufficient time to cause bonding of the first tubing to the second tubing. Preferably, the first tubing is made of a substantially non-crosslinked olefin and the second tubing is made of a highly crosslinked (heat shrink) polyolefin.
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