Plastic Glues
On Sep 16, 7:56*pm, Tegger wrote:
Dave wrote in news:7a8e3c05-ae00-47a4-aaed- : I broke the wand on a weed sprayer I really like. My 5 minute epoxy holds for a while until a side load is applied then zap. I've shopped Walmart and Home Depot so far and find nothing that claims to glue plastics. What ever happened to model airplane glues and the such? Have you tried a hobby shop? Plastics need the correct solvents for a proper weld, plus lots of bearing surface for a strong bond. And an uncontaminated surface. If any sort of substance has gotten on the fractured surfaces, a durable bond will likely be difficult. Model airplane glues are (were?) made for fusing styrene. Your weed sprayer probably has an ABS body. ABS contains styrene, so you'd think model airplane glue would hold, but there may not be enough styrene in the polymer to make a proper weld. Besides, even with the correct adhesive, the resulting butt joint will be forced to undergo very high bending loads relative to its surface area, very quickly leading to a new fracture. I think you need either a new part from the manfacturer, or a new weed sprayer. -- Tegger I would wrap fiberglass cloth (soaked with epoxy like you use to repair automobiles ) around the break extending about 6" in each direction up and down the shaft. That should stick to almost anything. |
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