Construction
Person who use PEF as freezer adiabatic construction of material
of building etc. we is it advise while being the following
to offer, for design department's reference:
1. The inboard of outer wall and steel concrete floor ceiling,
should do the cement mortar to whitewash story , if it is
form that at the layers of building, hope roofing is it smash
concrete construction craft now to adopt;
2. After making level and doing completely, first 20mm
with modify thick PEF polyvinyl alcohol contract, exert the
pressure of 1kg/cm2 in 4 hours before solidification. Two
sticking sticking intensity of pharmaceutical greater than
PEF own intensity, for being easy to construct, raise the
quality , adopt machinery strengthen , namely every m2 increase
4 enclose φ 30-60 hard M4 of spacer raise 6mm bolt (every
m21 of wall can only), and do the vertical-horizontal hot
sticking work of seam well. (PEF and other material sticking
can be adopted: FN303 (Shandong ), 401 (Beijing ) has immediately,
chlorine cube glue , press quick glue ,etc.).
3. After the first story glues the ceiling on the wall (generally
take more than 8 hours) firmly , begin from second with hot
to paste method (special-purpose electric heat excellent to
is it shut to glue ) make layer of PEFs glue, layers of seam
from head to foot is it stagger to want , do well every spell
hot sticking (with 75W upper and lower 150 W electric iron
sticking ) of seam work vertically and horizontally, until
the thickness of designing (include first layer of thickness),
the note: Second get up each thickness consider 40mm 50mm
generally, three of surface is it it reduces thin to be 30
- 20 , 36mm progressively to propose (whether 15 colored as
top layer even more ideal).
4. Because to it able to bears to be low to compress intensity
PEF, so and floor is it lose money instead of making money
PEF pattern to adopt.
5. The cold side layer can be chosen from the following or
other ways.
A. PEF insulates against heat on story and gives and buries
several to fix the heat insulation bolt in the outer wall
or the steel concrete floor (roofing ), and then make wire
net cement to whitewash in the regular wooden muscle of PEF
inboard
B. It insulate against heat PEF layers of outside the surfaces
adopt 15 times of,make by surface layer separately, but want
not making layer or wire net lasting surface layer for plank
on ground level ground 1.8.0M not above;
C. Surface paste first 8mm layer mould the surface fibreboard
(500*500 ) , waterproof fluid sealant filleting in PEF.
D. Mortar antiabrasion layer of brick wall
6. If the level ground should adopt PEF conduct to insulate
against heat on story in the freezer, it is as follows to
propose dealing with the way:
A. Prevent frostbite bloatedly in the basic unit according
to the general freezer designing requirement;
B. Ground is it spend ABS or able to bear low-temperature
polyvinyl chloride wait for board make cross section prop
up flat to find a room for, among it is vertical-horizontal
@ 500mm,height and thickness of insulating against heat of
it and;
C. Imbed 45 PEF , meet pieces of flat place sever PEF , let
piece rib of seat imbed PEF, PEF layer spell seam stagger
, and hot sticking spells the seam from head to foot;
D. Spread 20mm thick plywood or the mechanism board
E. Pave and is greater than 0.2mm polyvinyl chloride membrane,
the seam joins the width and is greater than 75mm, and use
the sticking pharmaceutical of polyvinyl chloride , or 2 width
two-sided to sticky to is it stick to take glass have for
20mm, look through get up 100mm all around, is it is it smash
steel the concrete when the layer to water to prevent, the
moisture permeates and insulates against heat on story
F. Floor loading situation is it smash corresponding thickness
200 steel layer the concrete to water , smash and up to the
powder at the same time.
7. In view of the thermal expansion nature of PEF, the cold
shrink phenomenon in order to be prevented in the freezer
operation course, must sew 20cm above , hot to melt seam temperature
control in 280 degrees Centigrade of ranges in 180 degrees
Centigrade by mistake from head to foot while being about
while constructing, moving at the uniform velocity, it is
even to pressurize. In addition in is it want fillet construct
to get up from top layer fourth , leave 2cm compress the surplus．
According to calculating, above-mentioned structures are
dealt with, PEF heat conduction coefficient will increase
3.8%
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