11525Views18Replies

Author Options:

is there a way to make a soft object hard (e.g. soft plastic)? Answered

some thing that you could brush on and let it harden?

Discussions

The forums are retiring in 2021 and are now closed for new topics and comments.
0
lemonie
lemonie

Best Answer 11 years ago

Resin - e.g. for glass-fibre, epoxy, varnish. L

0
animan1
animan1

Answer 11 years ago

would it work on plastic and if so how stiff would it get? does epoxy harden fast? is it cheap? help!

0
lemonie
lemonie

Answer 11 years ago

Paper is soft and flexible, like glass or carbon fibres, you can stiffen these up by impregnation with resin or glue. Plastic is different, what is it that you want to make? Epoxy can harden fast, and it can be cheap depending upon how much you need. L

0
dbarke121856
dbarke121856

8 months ago

Is there a way to make the top of this plastic birdbath firm? The bowl bends under the weight of the water! It’s not hollow do no filler will work. I like the design and want to keep it.

B69D7233-4C1D-415D-9BFE-6FEF21338219.jpeg
0
KarthikS117
KarthikS117

1 year ago

I am looking for some solution to harden soft plastic made connectors.

0
ShahidulI
ShahidulI

6 years ago

hi i want to make a plastic box for my soft shell crab farm which will stay on salt water and under sun always.the color will be black.wel i read that pp is best for the box but i need too many boxes and also have to save money.so can someone tell me what i should do? There are 2 types of scrap pp hard and soft in the recycle market.but i dont think it will perform wel.so plz tell me what i should do?should i mix something with the low quality pp scrap ? I need the box strong and soft and last long under sun on water

image.jpg
0
animan1
animan1

11 years ago

maybe i should change it to (e.g. soft plastic) ??

0
Gorfram
Gorfram

Answer 11 years ago

Thanks - that helps a lot with the "snerk!!!" factor. :)

0
animan1
animan1

11 years ago

im tryin to make an airsoft mask and i want to cover fused plastic and make it hard.

0
Gorfram
Gorfram

Answer 11 years ago

It depends on which plastic you use:

Plastic #2 (High Density Polyethylene) can be formed at the temperature of boiling water, and is as readily available as the nearest plastic milk jug. Plastic #4 (Low Density Polyethylene) is essentially the same stuff as #2, and is generally fully compatible with it. They will fuse at temps ranging from 220-265 F (105 -130 C), depending on exact plastic you're using.

If Plastics #2 and/or #4 are too heavy or not tough enough, you could try Plastic #5 (Polypropylene). You'd have to get it up to around 465 F (240 C) to form/fuse it; and I don't know of anyone who's tried it, successfully or otherwise.

And Plastic #1 (PETE) should be fusible at just below 500 F (260 C), but again I don't know of anyone who's tried it.

Don't use Plastic #3 (PVC), which emits nasty toxic fumes.

Plastic #6 (polystyrene) may or may not emit nasty fumes, but is probably too brittle for your purpose anyway (or too soft, if it's in the form of styrofoam).

Good luck with your project.

1
orksecurity
orksecurity

Answer 11 years ago

The resins used for fiberglass might be a good choice mechanically, but probably not very lightweight.

0
animan1
animan1

11 years ago

no i want to make it

0
animan1
animan1

11 years ago

could you use it on plasic?

0
Z1ggy
Z1ggy

11 years ago

Glue? plaster of paris. Concrete......

0
animan1
animan1

Answer 11 years ago

what type of glue?? not plaster or concrete

0
AndyGadget
AndyGadget

Answer 11 years ago

PVA glue watered down a bit and brushed on will give paper quite a bit of stiffness.

0
animan1
animan1

Answer 11 years ago

it would also need to be light and could not shatter if it fell

0
animan1
animan1

Answer 11 years ago

what about fused plastic???? and how hard?