u/Brief-Ant2989

My experience says otherwise. I'm just tired of everyone hyping ACP and metal when pp is literally everywhere and super tough. Let me rant: I built a small greenhouse frame using recycled polypropylene pipes so far three years outside in the UV and only slight fading, no cracking. Meanwhile my neighbour's expensive Aluminium frame corroded at the joints. Use carbon black filled PP for UV resistance! Also made a folding camp table from PP sheets – light and doesn’t soak up water! But my biggest PP win; I used 3D printed PP parts replacement for broken foot braces on a kayak (the project required use of a different nozzle). Also managed to source a roll of PP welding rod from ali baba repair of a cracked water tank was a success. Everyone who works with it complains it does not stick well to much of anything, but a hot air gun and roller with PP filler goes wonderfully together! However, I have some serious peeves:

- PP hinges fatigue too quickly; added a metal pin and that’s solved

- How does one paint PP effectively? I have tried flame treatment followed by enameled finishes still chips off.

- Can one injection mold PP at home? Thought I have seen DIY pellet extruders, dealing with shrinkage would be problematic I feel.

- For structural loads, with glass fiber additive, does it really double the strain before failure? I have not seen any hard data. What I ask of incredibly experienced makers is what is your preferred way of bonding pp to metal? I have only tried acrylic tape and mechanical fasteners. Anyone who's tried PP fabric for a portable rainwater catchment? Share your creative usage and let’s get to the bottom of this adhesion issue!

Hey folks as someone who has purchased a few UV lamps for closets and small nooks, here’s my perspective. Second, safety is paramount with these, and you should not be in the same room when using one. Be sure to air out the room with windows open due to ozone that many of these produce when running. For closet sanitizers, I would recommend one that is in the 6W-25W range with timers (the 15/30/60 min options are perfect). Also, ozone-free lamps are a safer option, but make sure you really need the extra disinfecting power.

For price, a decent quality closet UV lamp will run in the $25-$80 range on amazon. Higher end models (remote control, with larger “coverage” like 38W) can run up to $130. I have found some good options on Alibaba as well, as they often have good bulk pricing, and I’ve found the quality control is better since you can choose suppliers. Facebook marketplace sometimes has used ones; be wary about how long the bulbs have been used. What have people had experience with these and what brands are you hiding?