drainage boardRoof Garden Drainage Layer with a special plastic sheet extrusion process will be closed to the protruding cylinder shell to form a bump-like membrane, shell continuous, with a high degree of three-dimensional space and some supports, can resist the long-term high-pressure, no deformation. Shell top cover geotextile filter layer, to ensure that the drainage channel will not be blocked by foreign objects and, as particles or concrete backfill.
The bottom of JTHP drainage board is made of polyethylene which can bear longtime high pressure and has no distortion.It can bear the heavy weight,load of concrete board and unavoidable pressure outside in the construction such as vehicle,worker trampling,concrete affusing etc.With its anti-pressure property,it can remain the tonnage.Typical applications:
JTHP drainage board is better than traditional stone drainage and other filter layer.It can be widely used in the area of retaining wall,basement,tunnels,safe slope and the base of highway. Main technical indicators of JTHP composite drainage plate:

Ltem/Value	JTHP-103	JTHP-104	JTHP-105	JTHP-106	JTHP-107(1)	JTHP-107(2)	JTHP-108	JT HP-109
Color Floor	Black/white	Black/white	Black/white	Black/white	Black/white	Black/white	Black/white	Black/white
Material	HIPS
Quality(g/ sqm)	760	820	3600	1000	1100	1200	1300	1600
Thickness(mm)	Single10	Duplex18	Injection18	Single20	Single25	Duplex25	Single30	Single40
Anti-prssion strength(kpa)	400	200	1200	320	260	200	280	260
Geotextile color filter layer	Black/white	Black/white	Black/white	Black/white	Black/white	Black/white	Black/white	Black/white
Material	Polypropylene and polyester
Pore diameter(mm)	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15
Water	320	320	320	320	320	320	320	320
Tenlile Strength(N)	278	278	278	278	278	278	278	278
Quality(g/sqm)	150	150	150	150	150	150	150	150
Drainage Board specifications	1.2× 16.6m	1.2× 16.6m	336× 336m	1.2× 16.6m	1.2× 16.6m	1.2× 16.6m	1.2× 16.6m	1.2× 16.6m
Flow(L/S)	Tongli University hydraulic laboratory testeing
Head loss 5cm	1.6	2.4	3.5	2.9	3.2	3.2	4.2	4.6
Head loss deduction10cm	2.2	3.2	5.2	4.2	4.6	4.6