sobota 18. března 2017

The Kayak-Nessie is my small dream as an opensource project. You can order her now at Hongiy or use the images to make her at a different manufacturer if you want. drive.google.com/drive/folders…


I just wish I can take her on water soon for better pictures.



inflation:

deflation:

pondělí 17. října 2016

Nové nafukovací fórum

Drak i Nessinka vás zvou na nové fórum o nafukovacích hračkách nafukovaci.boards.net

Pro všechny, kdo mají rádi nafukovací hračky nejen na vodě, ale i ve sbírkách, na výpravách, o hledání, o opravách, zkušenostech, přáních, snech.


pondělí 30. května 2016

Finally there is a plasticizer available for everyone!

Already tested and it works the same as pure ATBC, as it is non-phthalate, non-toxic, pure ATBC, accoring to the datasheet:

www.sculpey.com/wp-content/uploads/2015/12/Clay-Softener-SDS-10282015.pdf

https://www.youtube.com/watch?v=LfdpUMd-01E

It is available in many shops around the world including local shops in the Czech republic.

So wish there will be more old inflatables happy to be as soft as they originally were!

_________________

Konečně měkčidlo dostupné pro každého!

Sculpey clay softener dle datasheetu obsahuje 100% ATBC, bezpečného bezftalátového měkčidla PVC. Byl otestován a funguje stejně jako chemicky čistý acetyltributylcitrát.

Je dostupný i v našich obchodech:

http://www.decodance.cz/produkt/sculpey-clay-softener-zmekcovac-modelovaci-hmoty-ASSD/ 

http://www.nemravka.cz/cz/eshop/detail/polymerove-tvoreni/hmoty/specialni-hmoty/clay-softener-sculpey-zmekcovac-polymerove-hmoty.html?utm_source=Heureka&utm_medium=zbozi

Katalogový list:
www.sculpey.com/wp-content/uploads/2015/12/Clay-Softener-SDS-10282015.pdf

Video z aplikace: https://www.youtube.com/watch?v=LfdpUMd-01E

 

čtvrtek 12. května 2016

Nessie as Czech Ice Hockey Team fan


There is no quidditch world cup these days so Nessie is our Czech ice hockey team fan!

sobota 7. listopadu 2015

Removing old or unsuccessful repairs

Repairs done by using a vinyl patch and common vinyl glue are known to be permanent. The glue is usually polyurethane filler diluted by MEK and acetone and such repairs are known to be permanent when stick together.

Even though sometimes we need to remove the patch and apply a new one. This can be due to part of the patch is starting to peel off after a few years on over exposed places because the PU glue degrades quickly or simply because we want to make the repair better.
This method can be applied on both occasions.

The main trick is to get pure MEK, Methyl eltyl ketone or butanone, cheap chemical you can buy in a model train shop or ebay.
When using a paintbrush with MEK you can start to peel off the patch with constant pouring little amount of MEK right between the patch and main material. Once the liquid MEK dilutes the closest layer of glue the patch starts to peel off with not much force needed.
After removing the whole patch you can just clean the place using ethanol or isopropylalcohol. If the remaining layer of old glue is too thick you can remove it gently by MEK too but don't expose the vinyl to MEK for too long.

MEK makes the vinyl soft and weak when touch but don't dissolves it much. When you rub vinyl with MEK you can damage the texture for example but not the whole material. So when an unwanted exposition happen just remove it gently and wait for a few hours for MEK to evaporate from the inside of the material, don't touch or rub the place until it will get the previous shape.

Warning: MEK is a pretty strong thinner so you don't need much prolonged contact with your skin until you clean it off by water..

MEK is useful chemical for other purposes also. As for model train buildings the same technique is applicable on most of those "computer's plastic" casings, for removing toner from home made pcb's etc..

pondělí 22. června 2015

Proper care of inflatable toys

Cleaning
The toy needs cleaning after each prolonged contact with our skin. Whether it's in water or at home. Use lukewarm water only and dry paper towel for regular cleaning and nanosponge for major cleaning.

Getting rid of smells
Use nanosponge and lukewarm water. It removes all the microscopic dirt on the surface of the vinyl. When using nanosponge regularly, there is absolutely no recognizable smell on exposed parts even after years of playing.

Cleaning inside
When the toy needs cleaning form the inside, it is possible with no troubles. The key is proper drying after doing this. It's simple. Just left the toy inflated and change the air using electric pump twice a day for a week for example until there is no water drops and no recognizable humidity in the air escaping through the valve.

Drying after mouth inflation
Mouth inflation of your favorite toy gives you an intensive impression but to do it every time is really bad for the toy. Please use hand or electric pump at least 20 times more then doing the mouth inflation and the toy will be safe. The best option is to apply the drying process above right after the play. Never put the toy on the sun to dry itself, it only degrades the material and printed colors.

Replasticizing
Use ATBC or other possible non-toxic plasticizer in a liquid state to apply directly on places that became rigid after prolong contact such as positive curves on places where you place your face often. Also apply plasticizer along the pinched seams to prevent small cracks using paintbrush.
Use mixture of 90 % of IPA and 10 % of ATBC to apply on painted areas of the toy to prevent melting the printed color with pure ATBC. When most places of the toy needs to be replasticized, use 10ml of ATBC for 1 square meter of the vinyl from the inside of the toy. Apply it when the toy is inflated through the valve and spread the liquid to desired places. Than deflate the toy and continue spreading rubbing the sides of the toy. Soaking takes time, at least a week for pure ATBC used inside. Unevenly spread plasticizer causes vinyl looks wavy a few days after the application but it will spread further as it is liquid and in a week all waves disappear.

Repairing
Use glue for flexible PVC only. It's cheap, easy to obtain and works perfectly. Prefer those that contain MEK, acetone and polyurethane. The glue itself has pretty low shear strength so a patch is needed every time. Use patching material with the same thickness as the toy has. Keep the application manual on the glue known as a contact method. Apply the patch from the outside or inside if you like. Usually the patch needs to be 10 – 15 mm wide and 10 mm longer than the tear or seam split. There is no tear or seam split the glue can't repair even when the toy needs to be completely rebuilt.

Cleaning glue residues
Drops of glue goes off using IPA when caught immediately. When it is too late use mixture of 90 % of IPA and 10 % of ATBC to remove the glue. This mixture is also useful for removing old patches for to make them better. ATBC affects the PU glue molecules pulling them out of the vinyl which remains virgin after the glue is successfully removed.

Stable inflated toys
Use lower pressure for toys intended to stay a long time for display. Atmospheric pressure and temperature changes volume of air inside a lot so check it sometimes or use http://www.wunderground.com for pressure forecast. Vinyl which is strengthen for a long time becomes thinner the same way toys gets when heat stretched. That's because the tensile strength curve for flexible PVC isn't the same for long-term explosure.

Toys near water
The most significant when near water is to avoid heat stretching and fading of painted colors on direct sunlight. Inflate the toy only little when it has to be put on a sunlight without you floating on. When you're floating on the toy the temperature inside is much lower then when the toy sits on water itself. When you go out of the water take the toy with you to the shadow place. It is ok for the toy to look deflated when you go out of the water. The vinyl contract quickly and the temperature rises in a minute for the toy to look fully inflated again. Never inflate the toy when you went out of the water realizing the toy is deflated, let the vinyl to contract itself.

Toys in winter time:
Older phthalate toys were more tolerant toward low temperatures than today's ones which can suffer seam splits when inflated and loaded below 15°C. On the contrary InflatableWorld.de toys for example can withstand freezing temperatures with no troubles because of their thin vinyl and it's unusual flexibility.

Storage
When folding the toy avoid sharp corners especially on important places such as eyes and snout of animal pool toys. Never put the toy into a cardboard box without a separator, PE foil for example. The wall of a cardboard box works like a sandpaper when the toy is moving inside the box and causes scratches and sometimes even leaks on sharp corners at the worst case.

How to get
nanosponge – households stores
IPA – hardware stores
ATBC – Use Sculpey Clay Softener or ask your friend at chemistry lab or university to buy it for you or ask Chinese factories for low amounts or samples.

Never give up

Always try to sell the toy you no longer want to anyone else to give the toy a new home. Most of them will become expensive collectibles doesn't matter the condition in a few years after the end of production.