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Plastic solvent-free composite modification
by：CSSSLD
2021-01-23
Wen injection tooling/VIP
solvent-free composite technology with dry and wet composite process differs in composite adhesive when without solvent and drying process. Solvent-free composite technology usually adopt wet solid type of one-component adhesive without solvent, commonly used 100% solid content based polyurethane adhesives. In recent years has been developed on the basis of the polyurethane 100% solid content of two-component adhesive.
plastic wet dry compound modification and plastic compound modification process are similar, just before and after the drying process and composite process for replacement. Wet plastic compound modification is on the first substrate coated with a layer of adhesive, and the second substrate composite processing, drying processing, to make the solvent evaporates in the adhesive layer of a composite method. Because after drying process in the composite, which requires at least one base material has excellent permeability, to ensure that solvent evaporation adequately without residue. As a result of the limitation of plastic composite by wet base material varieties, so its application is much less than the plastic dry type composite technology widely.
plastic extrusion composite modification is to use two or more than two extruder, respectively make plastic melt after plasticizing, into a total of the mouth of the mould, to form a composite method of the composite material. Plastic extrusion composite modified generally need not glue, thus has the advantages of simple process. This compound is mainly used in plastic modification, of which blocking modification is given priority to, and not suitable for plastic printing film composite. Plastic extrusion compound modification is one of the main composite method, the product cost is lower than other composite way better.
for performance comparison difference between the base material, due to its poor compatibility and low intensity of composite. In order to improve the composite strength, often need to add glue layer. Plastic extrusion composite adhesive for hot melt adhesive, it can be as base material resin processed by melt extrusion method, together with the base material extrusion into the common mode, so as to achieve the purpose of the composite.
plastic extrusion composite of several different base material or adhesive resin separately done in separate different extruder melting plasticizing processing, then respectively into special distributor, the distributor in the combined form multilayer laminar flow.
in the process of extrusion composite, composite layer control different viscosity of molten material similar or equal as much as possible. After meet different viscosity liquid distributor, liquid of low viscosity, has a tendency to encase the viscosity of molten material, thereby destroying laminar flow. Even fault happens, the impact on the performance of composite materials. Not heavy processing temperature difference of different base material should be as small as possible, because the melting temperature difference is too big, can lead to molding shrinkage caused by uneven layers stick relay is not strong. Speed control melt discharge ability, through control of different base material extruder speed can be control molten material proportion between several kinds of composite materials. General should prevent different composite layer between the velocity gradient is too large to produce a larger internal stress, serious can lead to stratification.
more wonderful sharing: 【 Injection molding processing VIP 】 Plastic dry compound modification, click directly.
or copy the link: http://www. csssld。 cn//html/2016/Trade_0412/200。 HTML
nantong on plastic products factory's official website: http://www. csssld。 Cn / /
source network trimmer/injection molding processing and VIP
solvent-free composite technology with dry and wet composite process differs in composite adhesive when without solvent and drying process. Solvent-free composite technology usually adopt wet solid type of one-component adhesive without solvent, commonly used 100% solid content based polyurethane adhesives. In recent years has been developed on the basis of the polyurethane 100% solid content of two-component adhesive.
plastic wet dry compound modification and plastic compound modification process are similar, just before and after the drying process and composite process for replacement. Wet plastic compound modification is on the first substrate coated with a layer of adhesive, and the second substrate composite processing, drying processing, to make the solvent evaporates in the adhesive layer of a composite method. Because after drying process in the composite, which requires at least one base material has excellent permeability, to ensure that solvent evaporation adequately without residue. As a result of the limitation of plastic composite by wet base material varieties, so its application is much less than the plastic dry type composite technology widely.
plastic extrusion composite modification is to use two or more than two extruder, respectively make plastic melt after plasticizing, into a total of the mouth of the mould, to form a composite method of the composite material. Plastic extrusion composite modified generally need not glue, thus has the advantages of simple process. This compound is mainly used in plastic modification, of which blocking modification is given priority to, and not suitable for plastic printing film composite. Plastic extrusion compound modification is one of the main composite method, the product cost is lower than other composite way better.
for performance comparison difference between the base material, due to its poor compatibility and low intensity of composite. In order to improve the composite strength, often need to add glue layer. Plastic extrusion composite adhesive for hot melt adhesive, it can be as base material resin processed by melt extrusion method, together with the base material extrusion into the common mode, so as to achieve the purpose of the composite.
plastic extrusion composite of several different base material or adhesive resin separately done in separate different extruder melting plasticizing processing, then respectively into special distributor, the distributor in the combined form multilayer laminar flow.
in the process of extrusion composite, composite layer control different viscosity of molten material similar or equal as much as possible. After meet different viscosity liquid distributor, liquid of low viscosity, has a tendency to encase the viscosity of molten material, thereby destroying laminar flow. Even fault happens, the impact on the performance of composite materials. Not heavy processing temperature difference of different base material should be as small as possible, because the melting temperature difference is too big, can lead to molding shrinkage caused by uneven layers stick relay is not strong. Speed control melt discharge ability, through control of different base material extruder speed can be control molten material proportion between several kinds of composite materials. General should prevent different composite layer between the velocity gradient is too large to produce a larger internal stress, serious can lead to stratification.
more wonderful sharing: 【 Injection molding processing VIP 】 Plastic dry compound modification, click directly.
or copy the link: http://www. csssld。 cn//html/2016/Trade_0412/200。 HTML
nantong on plastic products factory's official website: http://www. csssld。 Cn / /
source network trimmer/injection molding processing and VIP
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