Performance and Application of strong Cross-lamination Film Machine
What is the strong crosslamination film?
Using LLDPE（HDPE)as raw material,The tubular membrane blowed by the film blowing machine, And then divided by the cutting machine with the original machine stretching direction was 45 ° angle of the film roll,then by a special process cross, double layers paste into a composite film.the core process is:slit,Double laminated and Machine direction stretch,So will be made after the three process of LLDPE strong cross composite membrane SDM membrane for short.
Strong cross composite film process:
Raw materials mixing→→Blown film→→Stretch→→cutting→→High perssure bonding →→printing→→Finished product packaging
1,blown film.
Substrate film with three co-extruded structure, can choose flexible three layers of different materials. To meet different functional requirements.
2,Stretch ： The polymer in notstretch,The arrangement of macromolecular chains, segments or microcrystals is disordered ,therefore present isotropic.Butstretchafter,Tensile strength, modulus, elongation at break, impact resistance and so onVertical and horizontal directionThere is a significant difference，The strength along the stretching direction is multiplied。affect the stretchingthe major factors are the stretching temperature, the drawing ratio, the stretching speed and the quenching speed etc. 。
Stretching before and after the molecular chain arrangement
3、cutting:the film length direction and the original stretch of long molecular chain direction into45°degrees
4,composite
A single direction of the film stretched, it's performance is only enhanced in the direction of stretching, while the other direction is inevitably reduced, can not meet the needs of the substrate film.
Through special device processing, make the film for the stretching direction tilt 45°，The largest direction of it's performance is45°And then the two layers of film cross-composite, get around balanced film performance.
Base material.Aand base materialBThe films stretched in different directions are bonded together by means of a polymeric binder,45°cross,the performance is uniform
2, the strong cross-composite membrane standards (enterprise standard is for reference only)
1.Variety：Products according to the printing surface color is divided into four kinds, namely: black strong film (Ba), green strong film (G),bluestrong film(Bu)，white strong film (W). Other colors of the strong film can be determined by the supply and demand sides.
Products according to performance can be divided into 30, 40 and 60 type.
2、Specifications: strong cross composite membrane width specifications: 970mm 1000mm length of not less than 1000m
(Other specifications can be agreed between the two sides supply and demand)
3,Thickness and deviation requirements:
|
Serial number |
model |
30 |
40 |
60 |
|
1 |
thickness/mm |
0.14 |
0.12 |
0.10 |
|
2 |
Thickness limit deviation/mm |
≤ ±0.025 | ||
|
3 |
Thickness average deviation/% |
≤ ±10% | ||
|
4 |
Width deviation/mm |
≤ ±3 | ||
|
5 |
Quality per unit area/(g/m2) |
130 |
110 |
90 |
4、Appearance: Should be evenly harvested into a roll, no obvious deformation and winding around the gap, both sides of the formation, into the out of not more than 10mm.
Should be uniform color, surface smooth, no scratches, no bubbles, no holes and other impurities affect the appearance and performance of defects。
Each volume of strong film joints should not be more than 4, shorter period length should not be less than 20 m, joint should be cut and neat
5、Physical and mechanical properties:
|
No. |
Project |
30 |
40 |
60 |
|
1 |
4/5000 Lā shēn qiángdù Tensile Strength/Mpa ≥ |
30 |
40 |
60 |
|
2 |
Fracture nominal strain/% |
≥250 | ||
|
3 |
Droop impact does not break the number of samples |
≥8 | ||
|
4 |
Tensile properties/(N/50mm) |
≥200 |
≥250 | |
|
5 |
Maximum tension expands rate/% |
≥ 200 | ||
|
6 |
Breaking elongation/% |
≥250 | ||
|
7 |
Nail tear strength/N |
≥60 | ||
|
8 |
Tear strength/N |
≥25 | ||
|
9 |
Heat resistance |
120℃，10min ，No bubbles, no wrinkles, no yellow | ||
|
10 |
Low temperature flexibility/℃ |
-35℃，No crack, no stratification | ||
|
11 |
Resistant to aging |
Appearance no bubble, no crack, no separation | ||
3,Strong cross composite film performance:
Environmental protection, recyclable; soft, smooth, tough and durable; with anti-tear, anti-point tension, anti-puncture, wear resistance, waterproof, rust, anti-ultraviolet, outdoor long life; chemical resistance, dimensional stability Strong; can be sewn, bonding, bending, drilling, perforation do not need reinforcement; excellent low temperature performance( 2/5000 below zero40to90Degrees Celsius),Can be printed and printing.
1,Strong double layer superimposed film, with a higher tear strength and dimensional stability, waterproof performance is better than ordinary film.
2,The vertical and horizontal mesh structure design effectively solves the phenomenon that the tireless HDPE polymer sheet is easy to wrinkle up after construction.
3,Mask by the technical treatment, with anti-ultraviolet radiation performance, even after prolonged exposure to construction, it will not affect the appearance of the product quality, up to 6 months or so.
4,Resistant to high and low temperature performance, can adapt to hot and cold areas of climate change. Excellent elongation and tensile properties, to adapt to structural deformation of the grassroots.
6,Has a unique anti-puncture, self-healing and sustained tear resistance, excellent water rod screw.
7,This product has good low temperature resistance, is the subway, tunnel and can not fire the scene of the best waterproof, moisture and sealing materials, but also for the pipeline waterproof, anti-corrosion engineering.
8,Corrosion resistance: the coil has the very good acid and alkali resistance, chemical corrosion resistance, excellent aging resistance in various environment