摘要:
The plastic bag with a hem and draw tape may include flexible thermoplastic sidewalls that have a network pattern imparted onto them across the side seams. In one embodiment, the network pattern is below the hem seal. In another embodiment, the network pattern covers the hem seal. The bag may also include a ribbed pattern below the network pattern. The network pattern may be continuous or discontinuous.
摘要:
A process for producing an Sm.sub.2 Co.sub.17 alloy suitable for use as a permanent magnet, the alloy also containing iron, copper and zirconium or a similar group IVB or VB transition metal, and optionally praseodymium in partial replacement of the samarium. The process comprises providing the alloy in a preliminary form, sintering the alloy at an elevated temperature to achieve a high density and high remanence, selecting a solution heat treatment temperature which is marginally below the solid+liquid/solid phase transformation temperature of said alloy, cooling the sintered alloy body from the sintering temperature to the solution treatment temperature in a controlled manner to put the alloy constituents into a substantially uniform 2-17 Sm-Co solid solution, holding at the solid solution treatment temperature, quenching the alloy to room temperature, reheating the alloy to a first aging temperature to transform the 2-17 Sm-Co solid solution into a structure comprising a network of the 1-5 Sm-Co phase within a 2-17 Sm-Co matrix, cooling the alloy to a second aging temperature in a controlled manner to cause regions of 2-17 Sm-Co phase to nucleate coherently within the 1-5 Sm-Co phase network and create lattice strain which results in high coercivity and good loop squareness, and cooling the alloy to room temperature.
摘要:
The plastic bag with a hem and draw tape may include flexible thermoplastic sidewalls that have a network pattern imparted onto them across the side seams. In one embodiment, the network pattern is below the hem seal. In another embodiment, the network pattern covers the hem seal. The bag may also include a ribbed pattern below the network pattern. The network pattern may be continuous or discontinuous.
摘要:
The plastic bag may include flexible thermoplastic sidewalls that have a pattern imparted onto them. The wrinkle pattern may be a plurality of linear ribs formed into the sidewall that may be arranged adjacent and parallel to one another. To impart the pattern to the sidewall, a thermoplastic web used to make the sidewall may be directed between a first cylindrical roller and a second cylindrical roller, each of which may have a plurality of spaced ridges extending about their peripheries. When the web is directed between the first and second rollers, the meshing of the ridges may form ribs into the web.
摘要:
Multi-layered bags include an outer layer or bag and an inner layer or bag that is shorter than the outer layer or bag. The shortened inner layer or bag can stretch or expand to the outer layer or bag when loaded with objects or otherwise strained. Such multi-layered bags can allow for a reduction in thermoplastic material without compromising the strength of the multi-layered bag. In various implementations, the inner layer or bag may be non-continuously laminated, continuously laminated, or joined only along one or more edges to the outer layer or bag. Implementations including non-continuous bonds securing the inner layer or bag to the outer layer or bag can provide additional strength to the bag. Methods of forming multi-layered bags with a shortened inner layer including inserting an inner layer within an outer layer and then joining the layers to form a bag.