Latest Products
Contact Us
- 202,101, No. 3,Kaifa Road,Dalong Street,Panyu District,Guangzhou,Guangdong
721386668@qq.com
+86-15099958922
Machine Direction–Oriented Film
01. Principle Introduction MDO is a bolt-on system that can be added to most blown film lines. It significantly increases the tensile strength of the polyethylene film layers in this type of packaging by simply heating and stretching the PE layer, resulting in a multi-layer PE film that is...
Description
Principle Introduction
MDO is a bolt-on system that can be added to most blown film lines. It significantly increases the tensile strength of the polyethylene film layers in this type of packaging by simply heating and stretching the PE layer, resulting in a multi-layer PE film that is comparable in strength to films using PET, while being fully recyclable and environmentally friendly.
Introducing MDO orientation into your film application can significantly increase the film's strength. The secant modulus was tested in standard and MDO modified films and the results showed significant improvement. Other benefits include a jump in optical performance and improved haze values.
The chemistry of the polymer plays a role in the stretching process. For example, PVC, PVDC, PA6, acid copolymers, and ionomers typically have high levels of shrinkage. For example, consider the acid copolymer and ionomer families. Higher acid levels provide greater hydrogen bonding. Ionomers are acid copolymers whose acid groups have been partially neutralized by metal salts and contain both hydrogen and ionic bonds. Increasing the acid level increases the shrinkage of blown film, as shown in Figure 2. Shrinkage vs. stretch ratio for two ionomers with different acid levels. Increasing the degree of neutralization of the ionomer will also increase shrinkage, and both increasing the acid and the degree of neutralization will increase strain hardening behavior.
Stretching steps
Preheat-raises the film temperature uniformly without putting wrinkles in the film. This increases the polymer mobility and allows greater stretching in the next step without film failure.
Drawing-stretches the film (up to 10×) by making it longer, which forces alignment of polymer molecules in the film. In this section one drawing roll runs faster than the other.
Annealing-locks in the properties and controls shrinkage.
Cooling.
application
Flexible packaging is very popular and common in the food, beverage and cosmetics industries. Traditionally, these packaging products have used multiple layers of polyethylene film, including a PET reinforcement layer to produce an extremely strong and durable product, providing additional puncture and tear resistance.
The longitudinal film stretching machine is suitable for small-scale preparation and pilot production of longitudinal stretching films, longitudinal stretching production process research and optimization, and film stretching testing.
It is also suitable for the research and development of new film materials and the test line combining online longitudinal stretching and extrusion casting.
More photos
Related parameters
|
Item |
Unit |
FOHU-26 |
FOHU-35U35 |
|
Roller width |
mm |
260
|
350 |
|
Preheat roller |
No |
3 |
|
|
Stretching point |
|
1 |
|
|
Draw ratio |
|
10:1 |
|
|
Gap between stretching points |
mm |
0-50 |
|
|
Setting roller |
|
2 |
|
|
Cooling roller |
No |
1 |
|
|
Max. speed of film exit |
m/min |
40 |
|
|
Roller heating method |
|
High temperature oil / electric heating |
|
About Us
- Fifteen years of experience
- More than 3,000 customer cases
- More than 3,000 customer cases
- Customized service
facebook 
linkedin 
pinterest 
twitter 
whatsapp 
youtube 
instagram Hot Tags: machine direction–oriented film, China, suppliers, manufacturers, factory, price, for sale, Capillary and rotational rheometers, Capillary rheometer astm, 20 small single screw extruder machine, Small Fluoroplastics Extrusion Casting Machine, Micro Twin Screw Compunding Extruder, Lab 2 Roll Mill
You Might Also Like
