Multilayer barrier containers having increased adhesion and durability
A container, multi-layer structure technology, applied in the direction of layered products, household appliances, transportation and packaging, etc., can solve problems such as can not be used to manufacture containers with rigid structures
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Problems solved by technology
Method used
Examples
Embodiment 1
[0044] A three-layer pipe with EVOH as the core material and PP as the surface material was prepared according to the above co-injection molding process, and no maleated PP was added as a compatibilizer in any layer. The tubing is a 13mm x 75mm, 2.0ml telescoping tube with a wall thickness of 2.032mm or 0.080 inches. The tubes were made using different amounts (percentage by volume) of EVOH (based on the total tube structure).
[0045]To test the ability of the pipe to bear loads on its side, the pipe (without the plug) is placed on its side and a force is applied perpendicularly to a point between the center of the pipe and the top of the pipe using an Instron testing machine. In order to test the ability of the pipe to withstand radial loads, simulating the force of a plug, a probe is inserted into the pipe under pressure at the top (open end) of the pipe. Inspect the tubes visually for delamination. Specifically, those places where the tube delaminates become opaque.
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Embodiment 2
[0052] Dry blends of PP and maleated PP resins in different mixing ratios were prepared. The three-layer pipe was manufactured according to the above-mentioned co-injection molding process, with EVOH resin as the core material, PP / maleated PP resin blend as the surface layer material, and maleated PP resin as the compatibilizer. The material composition of each tested pipe is listed in Table 2. The amount of EVOH in the core layer is 5% (based on the total structure of the pipe), and different amounts of maleated PP are incorporated into the surface layer (expressed as a volume percentage based on the surface volume. ). These tubes are 13 mm x 75 mm, 2.0 ml telescoping tubes with a wall thickness of 0.080 inches or 2.032 mm.
[0053] The applied load test and temperature test of each pipe were carried out in the same manner as in Example 1. The test results are summarized in Table 2.
[0054] Table 2
[0055] The material composition of the tube
Flat applie...
Embodiment 3
[0059] A dry blend of EVOH and maleated PP resin was prepared. The three-layer pipe was manufactured according to the above-mentioned co-injection molding process, with PP resin as the surface layer material, blended EVOH / maleated PP resin as the core material, and the maleated PP resin as a compatibilizer. The material composition of each tested pipe is listed in Table 3. The amount of EVOH in the core layer is 5% (based on the total structure of the pipe), and different amounts of maleated PP are mixed into the core layer (volume based on the volume of the core layer) expressed as a percentage). These tubes are 13mm x 75mm, 2.0ml telescoping tubes with a wall thickness of 0.080 inches or 2.032mm. The pipes were tested in the same manner as in Examples 1 and 2, and the test results are listed in Table 3.
[0060] table 3
[0061] The material composition of the tube
Flat applied at the point of delamination
Average radial load (Ibs)
Flat applied at t...
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