Myth or truth?

[Swivel]

Just came to me... I remember when I was a kid and there was this rumour that went round that if your skyway was buckled then you could wack it in the freezer to straighten it. Is that totally bollox or not? LMK 

[JT71]

Bollox

oh and them coded stereos, they can be sorted by chucking em in the freezer too

and an Ebay ad this week for a Burner with a buckled mag said it could be straightened by putting it in the oven. 

[YGT]

actually its a true myth since skyways mere made from a dupont plastic.
by changing the core temp the plastic reverts to its original moulding shape.

same as if you heat up a yogurt pot it goes back into a disk shape in which it started life

[Swivel]

Blimey 

[JT71]

actually its a true myth since skyways mere made from a dupont plastic.
by changing the core temp the plastic reverts to its original moulding shape.

same as if you heat up a yogurt pot it goes back into a disk shape in which it started life

So heating will work but freezing won't?

but not too hot eh, unless you want your skyway to look like a plastic puddle.

[YGT]

I have to be honest, zytec is not a material I know too much about but I think that freezing them should do the trick.
no longer than 24-36 hours should be needed and i am not sure that after they defrost if they will hold their original straight shape ... but they should defiantly revert to their original during the freezing part

[Waxintaxin]

Its the thermo memory of plastic that this is based on

[piper]

Yeh its what is known as a thermoset,can find its way back to its origin,thermoplast on the other hand doesn`t,if someone gave you directions to a place and there were say 50 instructions ,left,left again second on the right,first left straight on ...you get the idea...you probably woudn`t find your way back..exactly the same for this type of plastic,can`t find its origin...!!!!

[Moose]

Try it ....................




......and I guarantee it's not going to work 

[Philbert]

i don't know what skyways are actually made up of but either way i can't see it working

thermosets will heat up and burn, it doesn't flex, hence thermoset.

thermoplastic will heat up and go floppy before melting, to re-true a wheel it would have to be heated correctly then put back into the proper mould to get its shape

thermomemory refers to the amount of elasticity in the plastic once set. to a point it will spring back, after that the material will stretch and change its density but won't be able to find its 'original state' through heating or freezing

[TwoBobRob]

I always believed it to be a myth.  Take a buckled Skyway off the bike, remove the tyre and tube and hang the wheel up by the axle in your shed/lounge/bedroom for a few days and it might relax back into shape. Thats about it though   

[Rombloke]

its complete and utter bollox in regards to the freezer.

dont ask me how i know...lol

but i would say that heat may work if the wheel were put into a jig.

Dave

[SaMAlex]

I liked the story just because, in the 80s .... who had a freezer big enough to prove it wrong?  

[Rombloke]

oh...useless fact.....zytel is hydroscopic....

and some more useless info
ZytelŪ HTN PPA Grades

•ZytelŪ HTN51 – Retains the highest stiffness and strength properties compared with other PPAs despite high temperatures and chemical exposure.
•ZytelŪ HTN52 – Molds in water-heated tools, with good retention of mechanical properties when exposed to heat, chemicals and moisture.
•ZytelŪ HTN 54 – Builds on ZytelŪ HTN52 with increased toughness and improved retention of mechanical properties with moisture.


ZytelŪ HTN Structural Grades (Not PPA)

•ZytelŪ HTN53 – offers improved stiffness and toughness at ambient/moderate temperature; excellent surface appearance using water-heated tools.


Encapsulation Resins
ZytelŪ HTNFE150010 BK083 30% Glass reinforced resin developed for encapsulation applications. PPA resin.

Flame Retardant Resins
ZytelŪ HTNFR51G35L NC010 35% Glass reinforced, flame retardant, lubricated for oil-controlled tools
ZytelŪ HTNFR52G15BL NC010 15% Glass reinforced, flame retardant, lubricated for water-controlled tools
ZytelŪ HTNFR52G20LX NC010 20% Glass reinforced, flame retardant high performance polyamide resin developed for lead-free soldering conditions
ZytelŪ HTNFR52G30BL NC010 30% Glass reinforced, flame retardant, lubricated for water-controlled tools
ZytelŪ HTNFR52G30NH BK337 30% Glass reinforced high performance polyamide resin, with a halogen-free flame retardant. PPA resin.
ZytelŪ HTNFR52G30NH NC010 30% Glass reinforced high performance polyamide resin, with a halogen-free flame retardant. PPA resin.
ZytelŪ HTNFR52G35BL NC010 35% Glass reinforced, flame retardant, lubricated for water-controlled tools
ZytelŪ HTNFR52G45BL BK337 45% Glass Reinforced, Flame Retardant High Performance Polyamide Resin

Glass/Mineral Reinforced Resins
ZytelŪ HTN53GM40HSL BK083 40% Glass and mineral reinforced high performance polyamide developed for moderate temperature, low warp structural applications.
ZytelŪ HTNFE150004 BK083 50% Glass/mineral reinforced high performance polyamide resin. PPA resin.
ZytelŪ HTNFE150005 BK083 38% Mineral/glass reinforced high performance polyamide resin. PPA resin.

Low Warp Resins
ZytelŪ HTN53GM40HSL BK083 40% Glass and mineral reinforced high performance polyamide developed for moderate temperature, low warp structural applications.
ZytelŪ HTN54G50HSLR BK031 50% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G50HSLR NC010 50% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTNFE150004 BK083 50% Glass/mineral reinforced high performance polyamide resin. PPA resin.
ZytelŪ HTNFE150005 BK083 38% Mineral/glass reinforced high performance polyamide resin. PPA resin.

Low Wear and Friction Resins
ZytelŪ HTNWRF51G30 NC010 30% Glass reinforced high performance polyamide with improved wear and friction. PPA resin.
ZytelŪ HTNWRF51K20 NC010 20% KevlarŪ Aramid Fiber Reinforced, High Performance Polyamide Resin. PPA resin.
ZytelŪ HTNWRF51MP20 NC010 20% TeflonŪ PTFE Micropowder, High Performance Polyamide Resin. PPA resin.

Toughened Resins
ZytelŪ HTN54G15HSLR BK031 15% Glass reinforced, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G15HSLR NC010 15% Glass reinforced, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G35HSLR NC010 35% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G50HSLR BK031 50% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G50HSLR NC010 50% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTNFE18502 NC010 Unreinforced toughened

Unreinforced Resins
ZytelŪ HTNFE18502 NC010 Unreinforced toughened
ZytelŪ HTNFE8200 NC010 Unreinforced toughened high performance polyamide resin with high temperature resistance. PPA resin.
ZytelŪ HTNWRF51K20 NC010 20% KevlarŪ Aramid Fiber Reinforced, High Performance Polyamide Resin. PPA resin.
ZytelŪ HTNWRF51MP20 NC010 20% TeflonŪ PTFE Micropowder, High Performance Polyamide Resin. PPA resin.

Glass Reinforced Resins
ZytelŪ HTN51G15HSL NC010 15% Glass reinforced, heat stabilized, lubricated high performance polyamide resin. PPA resin.
ZytelŪ HTN51G25HSL BK083 25% Glass reinforced, heat stabilized, high performance polyamide resin. PPA resin.
ZytelŪ HTN51G35HSL BK083 35% Glass reinforced, heat stabilized, lubricated
ZytelŪ HTN51G35HSL NC010 35% Glass reinforced, heat stabilized, lubricated
ZytelŪ HTN51G35HSLR BK420 35% Glass reinforced, heat stabilized, lubricated offering improved hydrolysis resistance
ZytelŪ HTN51G45HSL BK083 45% Glass reinforced, heat stabilized, high performance polyamide resin. PPA resin.
ZytelŪ HTN51G45HSL NC010 45% Glass reinforced, heat stabilized, high performance polyamide resin. PPA resin.
ZytelŪ HTN51G45HSLR BK420 45% Glass reinforced, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN52G35HSL BK083 35% Glass reinforced, heat stabilized high performance polyamide that can be molded in water heated molds. PPA resin.
ZytelŪ HTN52G35HSL NC010 35% Glass reinforced, heat stabilized and lubricated material that can be molded in water heated molds
ZytelŪ HTN52G45HSL BK031 45% Glass reinforced, heat stabilized high performance polyamide that can be molded in water heated molds. PPA resin.
ZytelŪ HTN52G45HSL NC010 45% Glass reinforced, heat stabilized high performance polyamide that can be molded in water heated molds. PPA resin.
ZytelŪ HTN53G35HSLRHF BK083 35% Glass reinforced, heat stabilized, lubricated, modified for improved flow
ZytelŪ HTN53G50HSLR BK083 50% Glass reinforced, heat stabilized, lubricated, with improved impact, stiffness and hydrolysis resistance
ZytelŪ HTN53G50HSLRHF BK083 50% Glass reinforced high performance polyamide resin with improved flow and excellent surface appearance using water-heated molds.
ZytelŪ HTN53G50LRHF NC010 50% Glass reinforced high performance polyamide resin with improved flow and excellent surface appearance using water-heated molds.
ZytelŪ HTN54G15HSLR BK031 15% Glass reinforced, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G15HSLR NC010 15% Glass reinforced, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G35HSLR BK031 35% Glass reinforced, heat stabilized, lubricated, toughened, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G35HSLR NC010 35% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G50HSLR BK031 50% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G50HSLR NC010 50% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTNFE150010 BK083 30% Glass reinforced resin developed for encapsulation applications. PPA resin.
ZytelŪ HTNFR51G35L NC010 35% Glass reinforced, flame retardant, lubricated for oil-controlled tools
ZytelŪ HTNFR52G15BL NC010 15% Glass reinforced, flame retardant, lubricated for water-controlled tools
ZytelŪ HTNFR52G20LX NC010 20% Glass reinforced, flame retardant high performance polyamide resin developed for lead-free soldering conditions
ZytelŪ HTNFR52G30BL NC010 30% Glass reinforced, flame retardant, lubricated for water-controlled tools
ZytelŪ HTNFR52G30NH BK337 30% Glass reinforced high performance polyamide resin, with a halogen-free flame retardant. PPA resin.
ZytelŪ HTNFR52G30NH NC010 30% Glass reinforced high performance polyamide resin, with a halogen-free flame retardant. PPA resin.
ZytelŪ HTNFR52G35BL NC010 35% Glass reinforced, flame retardant, lubricated for water-controlled tools
ZytelŪ HTNFR52G45BL BK337 45% Glass Reinforced, Flame Retardant High Performance Polyamide Resin
ZytelŪ HTNWRF51G30 NC010 30% Glass reinforced high performance polyamide with improved wear and friction. PPA resin.

Superstructural Resins
ZytelŪ HTN51G45HSL BK083 45% Glass reinforced, heat stabilized, high performance polyamide resin. PPA resin.
ZytelŪ HTN53G50HSLR BK083 50% Glass reinforced, heat stabilized, lubricated, with improved impact, stiffness and hydrolysis resistance
ZytelŪ HTN53G50HSLRHF BK083 50% Glass reinforced high performance polyamide resin with improved flow and excellent surface appearance using water-heated molds.
ZytelŪ HTN53G50LRHF NC010 50% Glass reinforced high performance polyamide resin with improved flow and excellent surface appearance using water-heated molds.
ZytelŪ HTN54G50HSLR BK031 50% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G50HSLR NC010 50% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTNFE150004 BK083 50% Glass/mineral reinforced high performance polyamide resin. PPA resin.
ZytelŪ HTNFE150005 BK083 38% Mineral/glass reinforced high performance polyamide resin. PPA resin.

Hydrolysis Resistant Resins
ZytelŪ HTN51G45HSLR BK420 45% Glass reinforced, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G15HSLR BK031 15% Glass reinforced, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G15HSLR NC010 15% Glass reinforced, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G35HSLR NC010 35% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G50HSLR BK031 50% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.
ZytelŪ HTN54G50HSLR NC010 50% Glass reinforced, toughened, heat stabilized, hydrolysis resistant high performance polyamide resin. PPA resin.





Dave

[Flaz]

geek

[Trev]

geek

 

[superbikedan]

do you know what,  after all these years it now makes sence

thanks to trevs info    NO you cant straighten tuffs

thanks trev,  made great reading

[Trev]

do you know what,  after all these years it now makes sence

thanks to trevs info    NO you cant straighten tuffs

thanks trev,  made great reading

  dan.....

that was dave's info, not mine.... 

[Bob_Acid]

Bart at Skyway dispelled this myth long ago.


get with the programme people 

[MeddlE]

I liked the story just because, in the 80s .... who had a freezer big enough to prove it wrong? 

I did, but I didn't have Skyways.  My step-father was a master butcher so we had a large chest freezer in the garage.  Not sure it would have been appreciated if they found a set of wheels sitting on top of the meat though.

[Nicfred]

everybody said the same,chuck em in the freezer and bingo they will come out straight,never tried it but can stiil remember,wonder who started that then,WAS IT YOU   

[tricknuts]

 defintely not a myth

put fish fingers in the freezer and they'll go hard

[Nicfred]

yeh right 

[jT Racing]

LOL, i can't believe this myth is still around, some geek should get a letter off to mythbusters, cough, cough, dave, cough. Let the supergeeks teach the way.