Roof Underlayment HDPE Cross Laminated Film
Description:
It is a high-strength multi-layer composite film,It is made of HDPE
as the base material,
adding plasticizer, plasticizer, stabilizer, antioxidant, UV
absorber, toughener and other
additives through multi-layer co-extrusion blow molding into
embryos, and then by multiple
pull Stretching, then rotary cutting into a film substrate with a
horizontal and vertical
distribution of 45 °, and finally through cross-compositing. Due to
its cross-stacking
structure is different from ordinary single-layer or multi-layer
film, it has the thermal stability,
dimensional stability, two-way tear resistance, two-way uniform
tension and high elongation
which are not available in traditional films.
Parameter:
| NO. | Item | Performance |
| | SDM-30 | SDM-60 |
| 1 | Tensile Property | Tensile Strength/Mpa ≥ | 30 | 50 |
| | MaxF/(N/50mm) ≥ | 200 | 300 |
| | Elongation as MaxF/% ≥ | 200 |
| | Elongation at break/% ≥ | 250 |
| 2 | Sample number of no broken tested by free-falling dart method ≥ | 8 |
| 3 | Tear Strength(Nail Shank)/N ≥ | 60 |
| 4 | Angle Tear Strength/N ≥ | 25 |
| 5 | Thermal Stability | 120 ℃,10min, No bulb, No deformation |
| 6 | Cryogenic Flexibility ℃ | -35℃, No fissure, No delamination |
| 7 | Thermal Ageing | Appearance | No bulb, No deformation |
| | Subsequent MaxF/% ≥ | 80 |
| | Elongation at MaxF/% ≥ | 200 |
| | Elongation at break/% ≥ | 200 |
| 8 | Artificial Weathering | Appearance | No bulb, No deformation |
| | Subsequent MaxF/% ≥ | 70 |
| | Elongation at MaxF/% ≥ | 180 |
| | Elongation at break/% ≥ | 180
|
Advantages:
- Excellent dimensional stability. It can fix its own size without
deformation.
- Two-way tear resistance. The vertical and horizontal mesh structure
effectively solves
- the phenomenon of easy wrinkling and drumming after construction
- Performance against UV radiation. The use of outdoor high
temperature conditions is
- guaranteed.
- High strength and high elongation performance. Excellent resistance
to high and low
- temperature.
- Unique puncture resistance, self-healing and continuous tear
resistance and excellent
- nail water tightness.
Application:
Printing Labels:
Waterproofing Membranes:
Why Us:
OUR THREE STEP PROCESS FOR MANUFACTURING HIGH STRENGTH, DURABILITY,
AND QUALITY PLASTIC FILMS IS THE KEY TO SUCCESS.
Step 1: Extrusion
High density polyethylene resin (HDPE) is extruded via the blown
filmprocess to form a tube. The tube is cooled and collapsed into a
flat tube.
After the tube is flattened, it is fed into a multi stage orienter.During orientation, the film is stretched in the machine direction
aligning
the polyethylene molecules. The resulting film is very strong in
the
machine direction.
The oriented tube is then annealed and wound up. The annealing stepremoves stress in the film and controls shrinkage.
The annealed film retains its high MD strength.
Step 2: Spiral Cutting
The next step of the process is spiral cutting. In this step, the
flattened, oriented tube in unrolled, rotated and re-inflated to form a round
tube.
As the film is fed forward and rotated, it is cut on a bias (around
45 degrees)
and wound up.
The spiral cut film’s orientation is at 45 degrees to the machine
direction.
Step 3: Cross Lamination
Finished spiral cut rolls are mounted on corresponding spindles. Films are fed through and laminated with an extruder with their orientation directions crossed at 90 degrees.
The films are laminated together with a layer of polyethylene.
After lamination, film is surface treated for ink adhesion and
graphic purposes. Finally, the film is wound on a core to estimated yardage.
