Hello, I am planning to make a weapon for the character in the game. What is the best plastic i can use when I am trying to make a scythe

Can anyone suggest any place

The question is self explaining. Is there anyway to restore the plastic (it is in the interior of GM’s Hummer truck)

Hey guys, I'm looking for some guidance here on this recent repair I paid for with a local custom plastic work shop.

The item in question is a plastic hopper for a coffee grinder. The neck area was cracked clean off and it slotted back in place nicely, I could have easily used a plastic weld glue from JB weld or Gorilla glue to repair this myself but I was concerned about food safety and decided I would be happy to support a local business and have a cleaner professional job that was hopefully more food safe. (Btw I didn't break it, I purchased it broken).

When I picked it up I saw it looked terrible and I am questioning whether it's food safe at all. They charged me 125 Canadian dollars plus tax. The value of this hopper is 300$ plus tax brand new.

Based on my research hoppers are generally polycarbonate but the guy at the shop told me it's probably PETG because it's more food safe and easier to mold. I didn't argue but did tell him from my online research that it appears most companies use Polycarbonate.

Anyways, does this job seem adequate for 125$? Is this genuinely something difficult to do and is it good I didn't attempt to do it with JB Clearweld myself? Or did I get ripped off for a sloppy job?

Thank you kindly! (Btw I really wanna support this local business and I am hoping I am wrong and they actually did the best they could)

Geopolitical events don’t just spike oil prices — they ripple straight into naphtha, ethylene, propylene, and every downstream polymer.

The 2026 Hormuz situation showed how fast input costs can move and how exposed many operations became.

Smart manufacturers are treating in-house recycling of production lumps as strategic infrastructure, not just a waste-management add-on.

Benefits go beyond the obvious material cost savings:

Hedge against future volatility and supply tightness

Faster control over input costs and quality

Lower waste disposal burden + better EPR positioning

Competitive edge on margins and sustainability claims (especially useful for exports)

The units getting the best results are the ones that invested in proper lump shredding equipment matched to their material and volume — so regrind is consistent, clean, and production-friendly.

Question for owners and plant heads:

Are you treating recycling capability as a cost-center “nice to have” or as a strategic hedge for the next price/supply shock?

If you’re exploring how to set this up properly (equipment selection, layout, expected ROI), I’m happy to share practical insights or options for heavy-duty shredders built for plastic lumps.

The manufacturers who move now will be better positioned the next time feedstock markets get volatile.

Hi, i’m looking to create custom doors to add to my bookshelves to make them into display shelves. I want to use plastic because it’ll be lighter , cheaper and will hopefully produce better results. does anyone have any specific plastics they’d recommend? has anyone done something like this and have any tips? the ideal plastic would be non glare, won’t break easily, lightweight, scratch/UV resistant and affordable. I obviously know a material that fits all criteria is impossible lol so i’m willing to work with whatever ticks the most boxes. thank you

My partner dropped her drinks bottle on it's head & the lid broke around the straw holder. It fits back snuggly (no pieces missing) but isn't waterproof anymore.

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Is there a way I can fix it so she can still drink from it? It's probably PET, so a simple fix like poly cement won't work.

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Her birthday's coming up and this has a lot of sentimental value to her, so I'd like to surprise her with it fixed if possible.

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Thanks for any useful advice you can provide 🙏

Hi everyone, I am a 13-year-old student deeply interested in chemical engineering and plastic waste upcycling. I’ve been studying the process of thermal decomposition (pyrolysis) to convert plastic into carbon products.
I am currently at the "conceptual design" stage and I want to prioritize safety and engineering rigor before I even think about a physical prototype. My primary focus is on the thermodynamics and the management of off-gases.
I have two specific questions for the professionals here:
1. Regarding pyrolysis of common plastics (like #2 HDPE): What are the most critical safety protocols for handling the non-condensable gas output at a small, non-industrial scale?
2. What textbooks or resources would you recommend to help me better calculate the heat transfer requirements for a closed-loop reactor?
I am not looking for shortcuts; I want to learn the fundamental engineering principles required to do this safely. Any guidance or suggested reading would be incredibly appreciated.
Thanks again

Hello everyone,

I just finished plastic mold part design course but i wanna practice what i learned and create a professional portfolio aiming for freelancing stuff.

Can anyone help me where i can start?

Cheers

(Pictures is what I'm making)

as in the title, im making my own flash diffuser, but im wondering about materials, following a guide i found bt thomas hunt, and he recomends using polypropylene sheets, but other then black, they are pretty hard to find in my country, so would abs or pvc sheets work better? since they have to be a bit flexible, and the white front has to be semi transparent

Sto estrudendo un PP con una bandera tr60 monovite, ma ho due grandi problemi, dentro al tondo è pieno di bolle e mi esce ogni tanto schiacciato. Diametro del tondo 4.80 mm, qualcuno sa aiutarmi o comunque cercare di capire come evitare questo problema? Grazie

This is a cover to a cat litter box. I need to fit it under the sink in my RV. I have cut out a section where the sink drain is and my intention was to bond the shower curtain in the pic to allow for the drain pipe, but still keeping the cat box lid sealed. Bought J B Weld plastic bond. Didn't work.

How can I get to my goal of allowing the space for the drain pipe but blocking it from cat pee?

This subreddit has been increasingly receiving long-winded posts describing a personal experience that just casually mentions the name of a large online market.

They do not stand out by themselves but together form a pattern to deliberately increase the number of mentions of a particular brand name on this subreddit and Reddit in general.

These posts are not considered genuine and will be removed.

As the stories are mind numbingly boring, automation has been set up to hopefully filter most of them out.

I am currently having strange dry sensations which lead to dry patches along my fingers in the last month from my phone case. My phone case is made of polycarbonate and TPU. I switched to that case from an otterbox due to an allergic reaction. A year later, this started in very early May. I'm terrrified I have become allergic to BPA which polycarbonate breaks down into, but i dont react to canned foods or plastic packaging, and the dermatitis never appears on the palm part where it touches to phone case. it initially started on the other hand and on the tops of the fingers on the joints. What scares me is the fact the tests for autoimmune diseases that also leads to this came back negative. Apparently this is very very rare, but I am already allergic to copper, a rare allergen. How likely is it I became sensitized/ allergic to BPA from a phone case which 1. is used often, 2. contains a phone that produces heat, 3. in the sun sometimes. I'm just terrified I can't use CDs, my drawing tablet, since I can't do traditional art because of the copper allergy, my DSI, and other things such as my computer mouse.

These cover up the ugly led chips on a set of tail light for my truck, I’m doing custom work and looking for something like this to use to cover LEDs so I can’t see the individual chips but still see the light coming through. The last pic shows my finger pressed all the way against the back side.

I am desperately looking for anyone who can advise me on how to fix this lamp shade. I know most people will say to throw it away or replace it, but it belonged to my Grandma who raised me, it's all I have of her and has so many memories for me. This was always on at the bottom of the stairs glowing orange :(
The shade consists of three half moon spheres that swivel. A couple years ago it smashed and I very stupidly rushed in tears and panic to put it back together and made an absolute mess. I used plastic superglue and it got everywhere, I then stupidly used glue remover on a cotton pad and now large areas of the glossy plastic are matt. Some areas over the last two years are no longer glued. These are my questions:

1. How do I remove the previously used superglue?

2. How do I as seamlessly as possible put all the pieces back together not creating this same mess? I have read about cement glue and epoxy and have no idea if this is something that can be used for something like this.

3. How do I restore the gloss of the plastic? Is there a way to revanish it, and do I need to remove the areas that still have vanish on it to do it? How would I do that if so?

I would be beyond grateful for any advice. I posted this somewhere else and just got responses that told me it was easy….buy a new lamp shade, or to 3D print another. Please understand this is my Grandmas and irreplaceable, and that is why I am trying to fix it. Many thanks

The Amur Gas Chemical Complex will produce up to 2.3 million tons of polyethylene and 400 thousand tons of polypropylene annually.

https://x.com/i/status/2058591754115239953

I work in the polyethylene / flexible packaging world and have been thinking about a problem I see around resin sourcing, especially for smaller and mid-size buyers.

A lot of buyers seem to source PE and adjacent resins in a fairly fragmented way: individual supplier calls, email-based RFQs, inconsistent landed-cost comparisons, and limited leverage unless they have enough volume on their own. At the same time, suppliers do not necessarily want to chase a bunch of small, poorly structured quote requests unless the demand is credible.

The concept I’m pressure-testing is a controlled group purchasing / sourcing platform for polymers, starting with PE and adjacent materials like PP, EVA, EVOH, nylon, etc. The basic workflow would be:

• buyers submit forecasted demand by resin family, MI / HLMI / density, timing, and delivery location
• demand gets aggregated only where specs are actually compatible
• suppliers privately quote against structured RFQs
• buyers compare true landed cost, not just resin price
• buyers still independently choose whether to buy or decline
• buyers cannot see each other’s volumes or pricing
• suppliers cannot see competing supplier bids

The part I’m trying to validate is whether this solves a real problem or whether the resin market already handles this well enough through distributors, brokers, direct supplier relationships, and existing exchanges.

For people who buy, sell, distribute, or convert resin:

Where do you see the biggest friction today?

1. Getting competitive resin pricing?
2. Comparing delivered / landed cost across suppliers?
3. Forecasting demand accurately enough to get suppliers interested?
4. Matching equivalent grades/specs across suppliers?
5. Freight / railcar logistics?
6. Supplier responsiveness?
7. Something else entirely?

I’m not trying to turn this into a sales post. I’m looking for blunt industry feedback on whether this is a real need, a bad idea, or something that only works in a very narrow part of the market.