7.5.29:
mobi`bathroom
7.5.21: intro
.
the main feature of the bathroom
is the dual-tank
portable toilet
which extends the capacity of the built-in 2.5gal cassette
with a 3in hose connection to a 7gal tank .
. the bathroom`s foundation is an
extension of the trailer
7.5.28:
. a urinal makes it easy to minimize movement in
limited space,
and collecting urine separately makes it available for reuse as a
toilet-flushing fluid .
7.6.2:
. in the usa`wa`spokane area, there is atleast one year-round dumping station
and there are also many outdoor public toilets during non-winter for
cassette dumping .
toilet
urinal
7.4.17:
. it needs a collector with a large entrance to the holding tank,
which can then be sealed to control odor,
. a floating ball could reseal the entrance right after the collector
has cleared
. that mechanism works best when the bottom of the collector is
ball-shaped;
otherwise, the ball tends to form a seal before the collector has
drained
. the most likely scenerio is running the pedal generator while
reclined,
and the most convenient way for a male to urinate in such cramped
quarters
is rolling to one side over a collector that hangs from a hook until
needed
6.10.10: $70
non-spillable toilet" passport
potty toilet 1.0
aq.gear/fred meyer's
# e 15609 spraque, spokane, wa
$70 portable non-spillable toilet" passport potty
(10L #6003, 2.6gal water closet, 2.6 gal sewage)
509 921 5350
wholesaler" maurice
sporting goods; 4674 aircenter circle; reno, nv 89502-5949
importer" cedar key manufacturing; northbrook, illinois 60065
manufac" sanitation
equipment ltd; ontario, canada, L4K 2S7
7.5.11:
a $70 pot?
. when you're around police and looking half-homeless,
the last thing you want is having your shady character looking cheap
with the sewage system
. in a marine context, a sealed toilet like this one is the law .
7.5.11: odor control
. for odor and gas control, they suggest using quarternary
ammonia
($8/16oz liquid gold),
but others point out smarter ways than
toxic germicides to control odor
. if you have access to a city dump station,
then nitrates won't damage the ground water, and they control
odor non-toxically,
by insuring that bacteria have the oxygen they need to produce an
odorless gas
. if you are dumping into a septic tank system,
then the most appropriate deodorizer contains neither a germicide nor a
nitrate .
7.3.29:
. the gas is a trivial problem if vented to a
stack out the roof .
. The "nitrogen cycle" is the biological process that converts ammonia
into
other, relatively harmless nitrogen compounds
. Nitrosomonas germs (among others) convert ammonia (NH3) to nitrite
(N02-),
while Nitrobacter germs (among others) convert nitrite to nitrate
(NO3-)
7.5.20:
. cycling the tank refers to the process of establishing
all the needed types of bacteria
in order to have bacteria producing everything needed by other bacteria:
. ammonia is converted into nitrate, the presence of which
then makes it possible for fecal bacteria to do their job odorlessly,
and in the process producing more ammonia from protein digestion
. nitrifying bacteria are present in all
air; they simply need a process
that allows an existing colony to be fed new work gradually
. as it gets full, part of it is moved to a completion bin,
where the bacteria completely consume it,
leaving a product that is no longer a biohazard threat .
maintenance
. bacteria or altitude changes may create pressure in the sewage tank:
to avoid getting sprayed, toggle the flush svalve with the lid down
[7.5.29: no longer a problem if you keep an air vent open all the time]
. the water tank (an optional flushing utility)
needs an additive that lubricates the flush pump and kills
algae eg, bio-san rinse
. pump shaft needs silicon grease or vaseline
. flush valve gasket needs petroleum jelly (vaseline?);
. cleaners must be plastic-friendly, and mix well with ammonia;
. a 5% bleach recipe"( cup bleach; 5L water), can disinfect
surfaces, but keep bleach out of the tank .
flush valve
leaks ?
. check for debris in the seal areas; if the cause is deterioration,
then the replacement should be soaked 5minutes in hot water first
. greasing it, too, may insure that the new part is squarely in place .
flush rod
leakage?
. pulling out the handle to open the valve
will expose the plastic ring that seals the shaft
. adjust the tightness of the valve shaft o-ring seal
by using long-nose pliers to grip the holes in the plastic ring
angled to help you turn right to tighten
. deterioration requires replacing the entire holding tank .
7.5.20: knowing when
to empty it
. the window in front is the waste level indicator; but, being a small
round view,
you'll have to watch it any time anything is added to the holding tank
since a single flush can raise the level comletely beyond the window
. alternatively, tipping the unit backwards after a flush
will indicate if the unit is full .
emptying the holding
tank
. separate the sewage tank from the top (this model has one latch and
one hinge);
find the spout (embedded on bottom of tank);
replace the top.side`sealing cap with the spout;
lift up the air vent (top.side`red cap)
. gripping the rear handle and the bottom-front`finger recess
gradually tilt up the front corner nearest you
and pour while keeping the spout on the diagonal;
finally, rinse before refilling with deo' .
6.10.28:
. I had trouble knowing how to use the tiny getting-full window;
and, soon I noticed that the flush was not fully emptying
7.5.29:
. the only way to recover from an overflow like that (in the unmodified
unit)
is by finding another toilet (or a double bag packed with absorbant)
and just turning the whole toilet upside down .
oil in the bowl --
pro's and con's
. the valve between holding tank and toilet`bowl is getting very
difficult to open
. a few days ago I had poured in some mct oil
( mct is a saturated fat that remains liquid at room temperature)
-- 7.5.29: the oil had to be
tossed anyway because it appeared to have fungus chains growing in it
(in saturated oil?! it was mixed with the preservative herb rosemary
to insure the freshness of added hormones (dhea and
preg')
. I assumed a saturated fat would be good for plastic and rubber,
keeping the bowl clean and lubricating the
valve;
but, now I'm wondering if mct oil can ruin some plastic parts
by making
them sticky .. 7.5.21:
however, the valve remains easier to move if water is left standing in
the bowl .
7.5.29:
. having the bowl smeared with oil does make it easier to clean;
another owner of this type of toilet said that there was a terrible
problem with
debris sticking to the plastic much more tenaciously than to the usual
ceramics
. with the oil in place, it's also easier to use a spatula instead of a
brush,
which saves a lot of rinse water while still being more sanitary .
6.10.11: roomy toilet
1.1
. toilet 1.0`s bowl is so small and
shallow
that the user should be prepared to squat rather than sit
. consider building a bowl`extension and raised seat .
6.10.26: reuse of
available parts
. make a toilet from a spare chair by simply removing part of the seat
. the lawn chair`s seat is slotted for ventilation;
and, this will make it easier hacksaw a hole in the seat .
6.10.28:
. the toilet seat would be purchased new ($5), and would serve as a
frame,
covering the rough hole cut into the
chair`seat
6.11.2:
. the cabin should have some easy way of
moving the chair aside while the
holding tank is dumped .
. an aluminum
lampshade for a 150watt 600vdc sodium vapor lamp
can be modified to serve as a bowl extension, acting as a funnel .
6.10.28: construction
. after seeing that the funnel on the porta-toilet
was a tight fit under the chair,
I got the idea that instead of bolting the funnel under the chair,
the chair`seats hole could exactly fit the funnel body
while being smaller than the funnel`s rim;
so, when you put the seat down, it locks the funnel in place .
. to make a round hole from a straight-cutting keyhole hacksaw
I made numerous cuts that looked like spokes on a bicycle wheel;
and
then pliars snapped off the spoke-like tabs of plastic .
6.11.23: easy-dump toilet 1.2
. if the the toilet were modified by perm'ly installing the spout
then emptying the holding tank would be more convenient
. it requires destroying a wall of the built-in water closet
7.5.29:
. it'd be more water-efficient and cheaper on maintenance
to use a squeeze bottle and apply the water as needed,
in various places and with various pressures .
6.11.10: cleaning
tool holder -- converted flush pump
. the spatula being used as a toilet`brush replacement
is narrow enough to fit in the well once used by the water pump
7.5.21: lid reuse
. the Passport.pot' tends to leak as the bowl is tilted;
one way to avoid this is modifying the currently unused lid
to form a lip around the bowl, with help from foam sealant .
. here is Passport
Potty ehanced with a lawn chair
to support a normal toilet seat (version 1.1)
and a perm'ly installed spout ( pictured to the right of the toilet )
. there's now an empty well where the watercloset`s pump used to go,
and I reused that to store the toilet brush (a thin spatula) .
7.4.17: spatterless
toilet 2.0
6.11.7: spout`extension
. to prevent splash, it needs a long hose that overlaps edge of the
hole it's
being dumped into;
and in the case of a toilet,
that means the spout`s end should be going
under the water`surface .
7.5.11: intro
. the toilet I purchased is their
smallest model, and has a cassette-style holding.tank
good only for emergencies rather than week-long
seclusions;
but small can be perfect, when it's time to unload it in a public
bathroom;
and, this cassette can fit discretely in a shopping bag .
. however, the only polite -- spatterless -- way to dump a Passport.pot'
is by adding a better spout
. it comes with about 6'' of plastic pipe,
and that needs to be extended in the usual rv way:
with a flexible hose designed to reach well into a
dump.station` hole .
. in the case of dumping into a public toilet,
the end of the hose needs to stay under the toilet`s waterline
because not only must spatter be controlled,
but also the odor must be contained to avoid a riot !
. people get alarmed when you bring a toilet cassette into a public
restroom,
and with good reason:
they usually contain either toxic-smelling ammonia
or poorly oxygenated, sulfuric sewage
-- not to mention the splash mess created by non-submersive vent
pipes
(a possibility any time the material is not completely liquified
as intended by quartenary ammonia) .
combine abs with
flex.hose
. the use of abs pipe lacks the flexability that will come in handy
when trying to keep the spout under the dump toilet`s water line .
but abs is cheaper than rv`flexi.hose, since it lasts forever if not
lost;
. if the rv`flexi.hose is reserved for just where a
connection should be flexible,
then this will minimize the cost of maintenance .
7.5.11: rv`sanitation glossary
. the standard rv`sanitation system comes 3-inch-dia. flex.hose
that has a quick.connect coupling system
for either hose-to-hose or hose-to-rv`holding.tank connections
. the quick.connect coupling has hooks on one side
(symbolized: quick.c)
which twist to wrap around knobs on the other side
(symbolized: quick.o)
. the rv`s holding.tank has a quick.o port .
7.5.21:
. when quick.connect's are sold with only one gender,
it's a quick.c to complement the rv` tank`s port .
. the Passport.pot' is a cassette system with a threaded pipe for the
dumping spout
( Outer threads: cas.o;
and inner: cas.c )
. the spout` piping diameter is 1/4 inch less than rv`hose .
. the cas`spout can be capped (threaded-pipe symbol: pipe(cas.c, cas.o) ),
and the same cap can fit the Passport.pot`s dumping port( cas.o )
. the cas`spout has a sharp angle that somewhat obstructs the passage
of partial solids;
therefore, that pipe should be sawed-apart,
and reused as a pair of straight cas`pipes: { pipe(cas.c), pipe(cas.o) } .
7.5.23:
. I've been experimenting with Reliance` 7-gallon.water.tanks as grand.cassettes
(symbol: g`cas)
to extend the capacity of the Passport.pot`s built-in
cassette-style holding tank;
and, Reliance has yet another threading std: ( symbolized: {cap:
g'cas.c, tank:
g'cas.o } )
the threads are larger to suit a softer plastic, and the cap has a 3''
center-diameter,
meaning that if you lathed-away the outside diameter just short of
reaching the threads,
then it would fit within a pipe or hose having a 3'' inside-diameter
. abs refers to acrylonitrile-butachene-styrene pipe
which has replaced pvc in plumbing app's: it's a copolymer, used
also in car parts,
that is lighter, more rigid, and safer than pvc
(it doesn't have pvc`s problem of emitting dioxins
when it burns)
. plumbing dept's have abs glue for use with hard connectors (T-joints,
L-joints)
. there are also connectors and caps made of rubber, which are held in
place by metal bands
. sizes are for od= {1.5, 2, 3}
. abs connectors in the hardware store are called hub-to-hub's when
they connect 2 pipes together
( symbolized: {banded-rubber: abs.c, glued-abs: hard.abs.c} )
7.5.22:
. foam refers to spray-on
polyurethane foam(
dow`good stuff, fire-block handi.foam );
it's an adhesive that can assist in the construction of cross-standard
connectors
. it's intended for use as a sealant, and a flexible filler
for light-duty applications (not for
fittings under pressure) .
. the airiness of the foam depends on not disturbing it;
so if you smear it around, it becomes more like paint .
7.4.17: dual-tank
toilet 2.1
7.5.21: intro
.
the dual-tank system has the Passport.pot`s holding.tank (cas)
routinely piped to a grand.cassette (g'cas)
thereby making quick work of dumping the single-use cas
. extending the time between dumpings
will give you more options about where to dump;
so, instead of trying to sneak into a mall every other day,
the g'cas can wait for a trip to the nearest out.house or
rv`dump.station
7.5.23:
. if you don't have a backup tank for handling a ruptured g'cas
then you've got either a clean-up headache or a legal action to deal
with .
gravity-feed# cas-lift
. the cas is emptied by lifting it over the g'cas,
which entails lifting the chair being used as a toilet`seat
gravity-feed# auto'
[obs]
. this version would work like a septic tank,
piping the Passport.pot by gravity to the g'cas,
thereby avoiding the per-use cas-emptying routine
. one big inconvenience is finding a way to seal the system,
since that is usually the job of the cas`valve
7.5.23:
. in order to avoid huge messes when rough traffic is spilling the
g'cas,
the pipe would have to be valved, or the tank removed from the piping
and recapped after every use -- even less convenient than cas-lifting .
7.5.21: inter.cas
connection
. the flex.hose coming from the cas.o port must be
long eno' to do a
U-turn from the cas`top to the g'cas`top,
plus any additional distance needed to bring them together .
. to use flex.hose as the conduit -- an rv`standard --
requires glue-assemblies for both cas-rv and g'cas-rv fittings
. only one quick.connect is needed,
so one of the rv fittings can be a cheap coupling
(basically just a short run of plastic pipe for banding 2 flex.hoses
together)
7.5.23:
. the coupling uses less space than a quick.connect,
and will thus be a good match for the cas-rv fitting
because the space near the cas`port is crowded by the bowl .
....:
. the quick.connect being glued to the g'cas cap
should be the knob-gender instead of the hooks
since other appliances (ie, the dump.extension)
will be attached to the g'cas,
and when looking to buy single spare parts, rather than pairs,
the part will be hook-gendered since rv`holding tanks are knob-gendered
.
. inter.cas parts: ( cas`pipe.c, flex.hose coupling, quick.connect,
g'cas`cap, <parts needed as glue> );
maint'parts: replace flex.hose as needed .
7.5.23:
dump.extension
7.6.1: summary
. the modular dump.extension is constructed with
(optional grommet; abs.pipe; abs.c; flex.hose`coupling; flex.hose;
quick.c)
todo:
. try fitting the flex.hose onto the abs.pipe
-- sawing a length of bulk abs.pipe is much cheaper than a
flex.hose`coupling .
7.5.23: req's & spec's
. if the dump.extension included a stretch of abs.pipe,
then less flex.hose would be worn out,
and there wouldn't be a need for a separate control rod
(keeping
the hose`end in place during the dump)
. the abs.pipe should be long eno' to reach under the toilet`water.line
at a bathroom
or into the hole of a dump station
. the hose should be easily replaceable,
but the hose-abs connection can be banded rather than quick.connected
. during transport of the g'cas to the dump,
the g'cas must be capped in case of spillage,
but this can be done either by a normal cap ( ext.# modular),
or by a connection with a capped dump.extension ( ext.#
integrated ) ...
ext.# modular
. the g'cas is sealed by a normal cap,
and then both ends of the modular
dump.extension are sealed separately
. the caps for the extension need only be water.proof, not
pressure resistant;
so,
the extension`end is capped by a loosely banded
abs`cap,
while the g'cas-end can be just a plastic bag, since it's containing
only odor, not liquid .
. that assumes there would be a system of straps on either the g'cas or
the dolly
which keeps the extension upright .
ext.# integrated
. the g'cas is capped by being connected with a dump.extension,
which is cas`capped by having the cas.o pipe as it`s terminal;
ie, the pipe(cas.o) should be connected to an abs.pipe whose length is
either
the full length needed by the extension or just the stub needed for
attaching an abs.c .
. connecting to a short run of cas`pipe could make the connection
difficult to clean,
so there has to be a collar to keep the joint out of a mess
. the obvious first choice for a collar is
a rubber grommet designed for sealing dump.station holes to flex.hose .
7.5.23: dumping kit
. there should be a system of straps on either the g'cas or the dolly
which keeps the extension upright,
and a separate set of straps that keep the g'cas secured to the dolly
. if the g'cas fell during a winter dumping run, then avoiding spills
will entail protecting the flex.hose from both the freeze and any quick
movements;
hence the extension should be banded securely to the g'cas, not the
dolly .
. the dolly should have some way of holding a bowl for washing;
so then
before the dump, the bowl is filled with water,
and after the parts are cleaned up, hands can be washed with cheap soap
thereby conserving on expensive antibacterials
. paper towels or rags are needed for the parts cleanup
. rinse.water (a jug of urine or dish.water) is needed to clear bulk
from the modular dump.extension
. dump.kit`parts: ( wipes, wash.water, bowl, jug of rinse.water, soap,
alcohol, straps, tank
harness anchoring straps, carry bag ) .
7.5.29: dumping with
only the { interconnect, cas.o pipe }
. unscrew the inter.connect from cas to produce (g'cas, flex.hose,
cas.c pipe)
. this can then be screw.connected to the cas.o pipe
which has eno' length to wrap the rv`dumping.grommet around .
--. there should be separate hoses for { inter.connecting tanks,
dumping }
so this routine should only be used if the dumping.extension is
unavailable,
since traveling can be rough on flex.hose,
and if the inter.connect breaks, it needs to be repaired within a day,
whereas the dumping hose can wait a week .
7.5.27: proc"g'cas
installation
6.12.4:
. a g'cas.o port can be securely connected to flex.hose
by modifying the
g'cas.c cap:
. saw-out the cap`top to leave only a ring of g'cas.c threads;
then glue those threads to a quick.connect
fitting .
7.5.23:
. when prepping the cap, leave the top a bit wider,
so it the banded rubber will have a tight grip on the slippery
polyethylene plastic .
7.5.27:
. as planned, the g'cas`cap had its top removed,
and the cas`elbow spout is sawed into a pair of straight pipes;
but, experimentation lead to a glue job that was done without foam .
better than foam
6.12.4:
. banding foam the inside of it a short piece of flex.hose,
with polyurethane before banding it to both the g'cas.c ring
and the quick.connect fitting .
7.5.23:
. a simpler way is connect the parts with a 3'' abs.c connector
. it is also a more certain way
7.5.27:
. no need for foam or rubber,
since the flex.hose can fit just about any diameter
tightly,
by pulling up the vinyl stripping that pins the wire down
. after unraveling the wire, re-bend it to fit the new pipe,
and cuff the de-wired flex.hose material to form more cusion
to absorb the faults in the seal as the vinyl is
folding around the pipe instead
of hugging it smoothly
. if the foam`s sealant qualities won't be needed
then I should reuse something that will both
cusion the vinyl from the metal band
and stiffen the bindings to keep flex.hose from being stressed
. the stiffener used was a cloth-backed vinyl from recycled glove`cuffs
. the combination of double glove material over
flex.hose,
can make a sufficient seal that should last indefinitely
pipe banding alt's
. I ran out of bands, but one quick.connect had a quick-bander,
which works by acting like a giant nut;
after putting the flex.hose onto the incline hose,
tightening the screw`thread.mate mate over the vinyl
will force it onto wider parts of the connector,
eventually getting it stuck there
. I could have just used the connector that came with the quick-bander
but it has a long steep incline for making the flex.hose easier to pull
on,
and if that were used for the inter.cas piping, without double-banding,
then the long inclined lip would tend to hold pools of sewage
which would then be more likely to seep out;
so I combined the quick-bander with a connector having a shorter
lip
. this was done by taking it apart, bending it, and reassembling it in
place
. now to release it, I need to undo the screw that holds the wire
inside its handle .
. g'cas`parts: ( tank, 4'' flex.hose, quick.connect, vinyl-cloth glove
material, 2 metal bands ) .
flex.hose
7.3.11: flex.hose sourcing
. flex.hose is unnecessarily fragile for the convenience of
being collapsable
and more easily stored
7.5.12:
. there are long-lasting tubes sold as waste-mgt solutions that are
flexible,
which although expensive, may be of use if cheap vinyl turns out to be
a
mistake .
7.5.11: proc"
sectioning flex.hose
. to cut flexi.hose into pieces,
just slice vinyl around for 360deg and then snip the remaining wire .
. a unit of the rv hose at walmart has about 6 pieces that can
turn 180deg
freeze.proofing
. the flex.hose is made of vinyl, and should not be frozen if could
be flexed,
as that will tend to crack it .
7.5.23:
. make a flex.hose jacket that insulates it from the freeze during
winter
dumpings .
tips & ideas
7.5.23: reusing
cas`pipe(
cas.o ) and a cap
. the cas`elbow.pipe has
been sawed in half to produce a straight pipe
for making the assembly"( pipe(cas.c), flex.hose`connector )
. the piece left over, pipe( cas.o), is also straight,
and can now be used as a capped
terminal for { flex.hose, abs.pipe }
. one of the cas`caps could be reused if there was an
assembly"( cas`pipe(cas.o), flex.hose`connect) .
. the 2nd cap is useful only if wanting to close the cas`port
or to replace a lost cap .
6.12.4: reuse cas`cap
by connecting ( cas.o pipe , flex.hose )
. the easiest way to cap a quick.connect is at walmart,
but if the cas.o pipe
should be reused,
then a short piece of flex.hose could be banded to both the cas.o pipe,
and a quick.connect
7.5.21:
. the banding does not have to be air.tight;
since flex.hose can be banded around the cas`pipe,
the loose area between the quick.connect and the cas`pipe can be
stiffened with foam .
. the flex.hose, although weak, would merely be a skin
that molded the foam; and together, they would have strength .
7.5.27: see better_than_foam
.
septic.tank-style
direct-connect [obs]
7.4.4:
. one problem with the Passport.pot' is that there is only 3''
between the bowl drain and the bottom of the holding.tank;
so, it can sometimes obstruct its own flow
. the drain pipe should instead be emptying into
a larger tank,
. however,
that requires double flooring in order to have the tank fit under
that toilet`bowl
. the bedroom already has double flooring (the first floor being
lockable storage space)
so it puts the toilet`s floor at the same level as the rest of the
living space .
7.4.7:
. the holding.tank is sealed with the cap that comes with it
while connecting to the flex.pipe via a duplicate cap (from a 2nd
holding
tank)
. if deciding against double-flooring for the bathroom,
-- keeping both toilet and tank on the same floor --
then the drain.hose would rest on the floor before being routed to the
tank,
. flushing would entail lifting the toilet and the hose above the
tank`s inlet .
7.5.11:
. the piping just after the toilet`bowl`drain should include flexi.hose;
because with the drain in the form of an S-shape, there
will be no back-splash,
and because the drain pipe is not rigid abs,
clogs in the S-shape are easily released by flexing the hose until it's
straight .
7.1.20: bathroom
with underspace
. one way to have double flooring is raising the inner.box
and then the flex.hose is routed through the inner.box`s sub.floor
access
panel
(when part of a fridge, the access panel routed fridge lines to the
freezer)
. the holding.tank would then be stored under the
bathroom floor .
7.4.4: alternatively,
the inner.box could be on the 1st floor, and the toilet would be on a
wooden platform .
7.4.7:
. having a high pedestal for the toilet should not destabilize the
vehicle
because when not in use, all the weight is on the bottom
where it
should be in a moving vehicle .
obsolescence factors
. on the road -- when the holding.tank is most likely to get spilled,
the holding tank should be separated and capped .
. it can be replaced with a backup tank that is close to empty .
...:
. this design has no easy way of controling pests or spills
7.5.29:
. I plan to be on the road quite often, so this system would be
inconvenient .
7.5.25: Reliance`
water-only tanks
. Reliance`water-only tanks have the #2
symbol of recycling
(meaning it uses the same resin as rv`holding tanks)
so why do they say "(for drinking water only) ? . perhaps ...
. if used as prescribed, then water tanks are still reusable for many
other
things,
since they're at the top of the recycling chain
( water bottles -> food
packaging -> household chemical bottling -> construction
materials )
but if used for sewage, then they will absorb -- and release --
whatever people feel like dumping in their toilets
. also, for legal purposes,
their products are not tested for burst strength,
so they can't advise using it for anything that would create a crisis
if spilled .
|
|
Properties:
toughness,
strength, stiffness, ease of forming, ease of processing,
resistance to
moisture and chemicals, permeability to gas.
Density: 0.94-0.96 g/cc |
The C=C double bond in an ethylene monomer is transformed into a C-C
single bond in the polymer.
[ . the expanded chemical formula for polyethylene
is a chain of ethylene
monomers which look like this: ( - HCH - HCH - )... ]
Description:
Bottles made from HDPE come in both pigmented and
unpigmented resins
.
The unpigmented resin is translucent. It also has good stiffness and
barrier properties
.
The pigmented resin has even better crack resistance and chemical
resistance than the unpigmented resin.
. HDPE's good chemical resistance allows
it to be used in containers holding household or inductrial chemicals
Packaging applications:
Milk
containers, juice bottles, water bottles, bleach, detergent, and
shampoo bottles, trash bags,
grocery and retail carrying bags, motor
oil bottles,
butter and margarine tubs, household cleaner bottles,
yogurt containers, and cereal box liners
Recycled products:
Drainage
pipe, liquid laundry detergent bottles, oil bottles, pens, benches,
doghouses, recycling containers,
floor tile, picnic tables, fencing,
lumber, and mailbox posts
6.11.22: frozen
holding.tanks
. tanks for liquid could be stressed by expansion during a freeze .
7.5.21:
. as insurance, several garbage bags should be available to contain a
cracked container
. there should be a backup tank for transfering the contents to
. contaminated tanks should be stored in a bag,
and then surrounded by absorbant material contained in a double-bag .
. authorities can give further advice .
6.12.04: composting
. if composting is properly aerated, bacterial action can provide some
heat .
7.5.21:
. composting units should be well insulated to conserve bacterial heat
and thereby keep holding tanks from getting frozen cracked .
7.3.10: toilet`seat
warmer
. the toilet seat is going to be cold if so well vented,
consider making a pocket for the toilet`seat
that's accessable from the bathroom but gets warmth from the cabin .
6.10.28: adjusting height of plastic chair
. to bring the chair closer to standard toilet height,
the legs -- which are capped angle-beams --
can be chopped and re-bonded to form double-thick feet .
7.5.6: paper dispenser
. pegboard long, would make a good tp-hanger .
