Extrusion compounding features
DATE：2019/5/23 9:44:19 / READ： / SOURCE：This station
Extrusion compounding features
Production of multi-layer composite barrier film by extrusion composite method, compared with dry composite and co-extrusion composite molding method
Compared, it has the following characteristics:
1) The equipment and process used in the extrusion compounding method are relatively simple, and the equipment price is relatively low. Suitable for equipment
Should be a wide range, the general multilayer composite film width is 500-I 000mm, the maximum is about 2,000; thickness is
0.015至0. 25mm, the thickest is 1. 0mmo
2) Different types of resins and films can be used to produce multilayer composite films with different barrier properties.
Gas permeability and water vapor transmission rate can be adjusted over a wide range. It can be used with aluminum foil, vacuum aluminized film
Composite, reaching almost airtight: not moisture permeable, which is difficult to do with well extrusion compounding. ‘
3) Extrusion compound molding, generally do not use a light gelatin cat agent, compared with the dry composite method, the drying can be omitted
Road, solvent recovery unit, 'reduce multiple layers
Production cost of film. If the production line needs to increase
Glue cat coating device, also than dry complex
The search device is much simpler.
.411 extrusion compound production line can be produced according to
Product technical requirements for expansion, such as setting more
Extruder, coextrusion compound die,
Adding a plastic drill coating device, etc., during production
Can also be repeated two or more times
Extrusion compounding operations. Use the same extrusion complex
Combined production line, can produce more layers
Composite barrier film.
2. Layer structure of extruded composite film
Layer structure of extruded composite film (fig
8-4) There are several types: single-sided composite film,
Sandwich composite film, double-sided composite film, multilayer
Extrusion of a composite film or the like.
(1) Single-sided composite film is also called extrusion
The coated film is a composite film of a molten film on the substrate
A composite material composed of sides. Molten film
Can use LDPE, PP, EAA, EVA, etc.
Resin; substrate can be BOPP, BOPET,
LIRE, 腆 and "_吟.A空 ‘7ila4
*444. ‘吧竺材nl#6tmi0ml taste
Soup girl. When producing, you can choose 'I, single piece' and
Sheet substrate; a double film tubular substrate may also be used. Figure 8 is a schematic view showing the production of a single-sided composite film.
(2) A double-sided composite film melt film is composited on a composite material composed of two sides of a substrate. It can
The secondary single-sided extrusion compound is selected, the substrate is combined with the double film, and the two extruders are used for the secondary substrate serial extrusion.
Method such as compounding, such as EAA/aluminized film/LDPE., ‘--
(3) Sandwich composite film extrusion
The molten film is sandwiched between two substrates
A composite film composed of between. Optional film
From use
lA one choice
Use PE, PP,
EVA and other resins;
EAA,
EM
BOPET
film,
, BOPP
Substrate
BOPA,
, CPP
Aluminum foil, aluminized film, etc.
Type products such as BOPP.- (printing
WEAT
EVA/LDPE film. Sandwich composite film
The production process is shown in Figure 8-6a - one by one
(4) Multi-layer extrusion composite film · A composite film composed of a plurality of substrates and a plurality of molten film extrusion composites.
Multi-layer extrusion composite membranes are available in a variety of alternative production processes. Figure 8 is a typical multi-layer extrusion composite film
Production Process. Multi-layer extrusion composite film can be extruded by multiple-sided composite film multiple times; laminated composite film is extruded again
Composite; two or more extruders are connected in series to form an extrusion compounding line. Extrusion die
The head can be selected from a single-layer flat die in a two-piece flat die, a co-extruded composite flat die, and the like. typical
Multi-layer extrusion composite film such as LDPE film (printing) / EAA / A1 foil / EAA / LDPE film, PP / aluminized film /
EAA/BOPP (printing), LDPE (printing) / LDPE-EAA' coextrusion / Al box / EAA-LDPE coextrusion /
LDPE film, PET/EVOH film/LDPE/EVA film, and the like.
Production of multi-layer composite barrier film by extrusion composite method, compared with dry composite and co-extrusion composite molding method
Compared, it has the following characteristics:
1) The equipment and process used in the extrusion compounding method are relatively simple, and the equipment price is relatively low. Suitable for equipment
Should be a wide range, the general multilayer composite film width is 500-I 000mm, the maximum is about 2,000; thickness is
0.015至0. 25mm, the thickest is 1. 0mmo
2) Different types of resins and films can be used to produce multilayer composite films with different barrier properties.
Gas permeability and water vapor transmission rate can be adjusted over a wide range. It can be used with aluminum foil, vacuum aluminized film
Composite, reaching almost airtight: not moisture permeable, which is difficult to do with well extrusion compounding. ‘
3) Extrusion compound molding, generally do not use a light gelatin cat agent, compared with the dry composite method, the drying can be omitted
Road, solvent recovery unit, 'reduce multiple layers
Production cost of film. If the production line needs to increase
Glue cat coating device, also than dry complex
The search device is much simpler.
.411 extrusion compound production line can be produced according to
Product technical requirements for expansion, such as setting more
Extruder, coextrusion compound die,
Adding a plastic drill coating device, etc., during production
Can also be repeated two or more times
Extrusion compounding operations. Use the same extrusion complex
Combined production line, can produce more layers
Composite barrier film.
2. Layer structure of extruded composite film
Layer structure of extruded composite film (fig
8-4) There are several types: single-sided composite film,
Sandwich composite film, double-sided composite film, multilayer
Extrusion of a composite film or the like.
(1) Single-sided composite film is also called extrusion
The coated film is a composite film of a molten film on the substrate
A composite material composed of sides. Molten film
Can use LDPE, PP, EAA, EVA, etc.
Resin; substrate can be BOPP, BOPET,
LIRE, 腆 and "_吟.A空 ‘7ila4
*444. ‘吧竺材nl#6tmi0ml taste
Soup girl. When producing, you can choose 'I, single piece' and
Sheet substrate; a double film tubular substrate may also be used. Figure 8 is a schematic view showing the production of a single-sided composite film.
(2) A double-sided composite film melt film is composited on a composite material composed of two sides of a substrate. It can
The secondary single-sided extrusion compound is selected, the substrate is combined with the double film, and the two extruders are used for the secondary substrate serial extrusion.
Method such as compounding, such as EAA/aluminized film/LDPE., ‘--
(3) Sandwich composite film extrusion
The molten film is sandwiched between two substrates
A composite film composed of between. Optional film
From use
lA one choice
Use PE, PP,
EVA and other resins;
EAA,
EM
BOPET
film,
, BOPP
Substrate
BOPA,
, CPP
Aluminum foil, aluminized film, etc.
Type products such as BOPP.- (printing
WEAT
EVA/LDPE film. Sandwich composite film
The production process is shown in Figure 8-6a - one by one
(4) Multi-layer extrusion composite film · A composite film composed of a plurality of substrates and a plurality of molten film extrusion composites.
Multi-layer extrusion composite membranes are available in a variety of alternative production processes. Figure 8 is a typical multi-layer extrusion composite film
Production Process. Multi-layer extrusion composite film can be extruded by multiple-sided composite film multiple times; laminated composite film is extruded again
Composite; two or more extruders are connected in series to form an extrusion compounding line. Extrusion die
The head can be selected from a single-layer flat die in a two-piece flat die, a co-extruded composite flat die, and the like. typical
Multi-layer extrusion composite film such as LDPE film (printing) / EAA / A1 foil / EAA / LDPE film, PP / aluminized film /
EAA/BOPP (printing), LDPE (printing) / LDPE-EAA' coextrusion / Al box / EAA-LDPE coextrusion /
LDPE film, PET/EVOH film/LDPE/EVA film, and the like.
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