Key Points of Extrusion Composite Production
DATE：2019/5/24 8:57:55 / READ： / SOURCE：This station
(1) Improving the interlaminar drilling force of the extruded composite film by interlaminar a force, followed by the extrusion resin
When the density decreases, the melt flow rate increases and the extruder heating temperature increases.-
In the extrusion compound production, the extruded melt film contacts the rubber roll first, then the cooling roll; compounding
Corona treatment, ozonation treatment, drilling agent coating, heating or flame treatment on the surface of the base material are all beneficial.
The interlaminar drilling resultant force of the extruded composite film was increased. Divination
In extrusion compound production, the traction speed of production line is reduced and the distance between die and compound roll is shortened.
Increasing the pressure of rubber roller and the thickness of melt film layer is also beneficial to improving extrusion.
The interlaminar cat resultant force of the composite film.
(2) Selection of suitable adhesive (AC agent) Some kinds of substrates are interlaminated with melted films.
Low force, easy to peel off, at this time, suitable gel release agent can be selected to coat on the substrate to improve the extrusion composite film.
Interlayer drilling resultant force. There are mainly three kinds of rubber salary agents for extrusion composite membranes:
All-purpose water-soluble gel salary agent is the best one for escaping comets.
Water and alcohols can be used as solvents.
Low cost, low risk, good oil resistance and early erection relay. But it has poor dryness, poor moisture resistance and difficult processing.
Difficult. There's a danger of catching up with each other. Solid content is about 0.3% to 0.5%, coating quantity (drying quality) is 0.3%.
0.01-0.05 m2.
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2) F-agent of alkyl acetate of Chinic acid. Solvent-based rubber drilling agent, commonly used toluene, n-hexane as the solution of vitex.
Fatty acids have good adhesion, strong versatility, soft film and are not easy to connect with each other. But it is easy to hydrolyze, _Luojing
High volatility, high risk, poor water resistance, short service life in high humidity and high temperature environment, L mustard whistle
Used in gradual reduction. Solid content is generally 3% to 15%, early coating `neat it'-!G 73
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3) Heteroacid vinegar (carbamate vinegar series)'type of rubber drilling agent. Two-component solvent-based rubber drill, common vinegar
Acidic vinegar is a solvent with good versatility, water resistance, boiling resistance, high temperature resistance and oil resistance.
Low consumption. But when used, solvent volatility is high, risk is high, cost is high, and initial drilling relay is poor.
The dangers of intermingling. The solid content is 10%, and the coating quantity (dry exercise quality) is about 0.2-10.5 expansion.
Used for aluminium foil lamination, the effect is very good. Second call:'". Competition. · Buqi
(3) When suitable resin and base material are used in extrusion composite production, the properties of composite absorbing diaphragm should be considered.
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Purpose and base material.
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’ The commonly used resins are:
PE, PP,
EM AA Ionic Polymer of PET, EVOH, EVA, EAA
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Commonly used substrates are: CPP,
Multilayer co-extrusion composite film of substrate,
BOPP, R BOPET
PVDC coated film
DuPont Company of the United States, which has entered the market in recent years
BOPA, aluminium foil, aluminium coating, etc., as well as the above
Dry composite membranes, etc. }'Beggar'
"Reliability (NUCREL)
Thermal drilling resin of ethylene-acrylic acid-methyl vinegar-acrylic acid ternary copolymerization. It fits the United States.
AE'resin is a kind of resin.
FDA regulations can be used
In the case of food and drug contact, it is a satisfactory resin for extrusion compound. For example, general extrusion compounding is used.
LDPE/aluminium foil barrier film was produced by LDPE/aluminium foil method. The cat force between LDPE and aluminium foil was low. If you use thousands of formulas
Compound production,'due to barrier membrane residual solvents, chapped aluminum foil and other reasons, can not be used as food and drug packaging.
If 20 copies (mass fraction) "firm AE" were blended with 80 copies of LDPE, the product would be produced by extrusion compound method.
LDPE/aluminium foil film, in terms of product price, interlayer cat resultant force, barrier, integrity of aluminium foil, etc.
Can meet the requirements of use.
Membrane/a small amount of cat gel/firmness
Aluminum foil, aluminium foil/solid AE
In addition, BOPET can also be produced by blending and modifying "solid AE" resin.
AE + LDPE / aluminium foil, BOPP film / a small amount of rubber drilling agent / solid AE + LDPE/
High barrier composite films with good properties such as 10 LDPE/aluminium foil.
Author：admin