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What is theMethod of lamination for flexible packaging?
Dear friend , The techniques used for lamination can be classified on the basis of adhesive system used. The most common lamination techniques are · Wet lamination - By using water based adhesives · Dry lamination - By using solvent based or solventless adhesives · Hot melt or wax lamination - By using wax or polymers like polyethylene, polyamides etc. · Extrusion lamination - By extruding polymers between two substrates In packaging industry, solvent-based & solvent free adhesives are commonly used for most of the flexible laminates . Santosh Acharekar, 9820159050
What is Enamel Paint formula?
Enamel Paint formula is developed only after understanding the application of the paint, method of of application, substrate, condition of the environment etc, A general formulation will include Resin, Solvent, Pigment and Additives combined in two different stages followed by straining and packing The first step is Milling ie ground or mill the pigment particles in an attritor mill in combination with necessary additives, the paste is then let down and diluted with the remainder of the binder and solvent, finally additives are added and batch tinted to desired color A general formulation will include 30-40% Resin (long oil alkyd), 20% solvent, 20% pigment, 10-12% extenders and additives About 100 different raw materials are combined to yield more than 1000 shades
What is the difference between cutback bitumen and bitumen emulsion?
Cut-back bitumen uses solvent as the mixing medium where in Emulsion uses water to dilute bitumen for the purpose of tack-coating / road works
Advantages and disadvantages using cutback bitumen?
Cut-back BitumenCutbacks have several advantages· They are fluid at lower application temperatures (50° to 250°F).· They remain f uid for a longer period after they have been applied to the road, which permits some latitude between their distribution and the application of rock.· Some of the cutter remains in the cutback seal to remain flexible to conform to some movement in the underlying pavement and base. A cutback can have self-healing characteristics with minimal cracking.· The cutback can tolerate some fines in the cover aggregate. The kerosene cutter is more tolerant than the naphtha to these fines.· Mixes can be made with unheated aggregates and some cutbacks.The disadvantages of cutbacks are as follows:· The cutbacks do not obtain their ultimate strength until a good part of the solvent has escaped (evaporated). During the "curing period," the rock can be displaced under heavier traffic, particularly in warm weather. During this same period, early rain can float the cutback to the top of the rock and can be tracked away under traffic. The type of cutter solvent affects the "curing period."· There is a potential fire hazard using cutbacks that contain petroleum solvents.· In certain areas, air pollution is a concern as the solvent evaporates into the atmosphere.· Excessive moisture on either the pavement to be sealed or the cover rock can hinder good adhesion with a cutback.
What are the disadvantages using solvent cement?
These are the disadvantages of acrylic plastic Well, firstly it is very cheap, so it wouldn't be very good in the first place. It cracks easily. It scratches easily.(Don't use sandpaper on it, because it will look like a very old window-scratched-!) It breaks, snaps, and shatters easily. I hope knowing this will help you with homework/classwork, or coursework.
What is a solution when water is the solvent?
When chemical substances are dissolved in water, this is called an aqueous solution.
What does solvant mean in chemical terms?
solvent is a substance that has the ability to dissolve other substances
What is considered to be the universal solvent?
water is considered to be the universal solvent because it is easily used to dissolve many substances. in addition, in chemical reactions water is often considered the solvent.
What does a solvent do in a chemical reaction?
A solvent is a substance that dissolves other substances, allowing them to mix and react together. It helps facilitate the chemical reaction by providing a medium for the reactants to interact and form products.
What compound is considered to be the universal solvent?
water is considered to be the universal solvent because it is easily used to dissolve many substances. in addition, in chemical reactions water is often considered the solvent.
How do you use chemical property in a sentence?
The chemical property of water that allows it to dissolve many substances makes it a versatile solvent.
Is fire a solvent?
No, fire is not a solvent. A solvent is a substance, typically a liquid, that dissolves a solute to form a solution. Fire is a chemical reaction involving rapid oxidation that produces heat, light, and combustion gases, but it does not dissolve substances like a solvent does.
What is called ''the universal solvent''?
Water is at times recognized as a universal solvent because of the many substances that it can dissolve. However, water is not capable of dissolving all substances, especially those that are nonpolar or hydrophobic in nature.
Why doesnt all substances dissolve?
Not all substances dissolve because they may not have a similar polarity to the solvent or may form strong chemical bonds that prevent them from breaking apart and dispersing in the solvent. Additionally, some substances may have limited solubility due to factors such as temperature and pressure.
Is chloroform soluble in chloroform?
Solubility is defined as the ability of an chemical substance(solute) to dissociate in inside another chemical substance (solvent) to form a homogeneous solution. Thus , the solute and the solvent must be 2 different chemical substances. In this case, both substances are similar. So by mixing them together, we cannot measure solubility.
Is soulbility a chemical or physical change?
Solubility is a physical change, as it involves the dissolving of a solute in a solvent without changing the chemical composition of the substances.
What is a chemical solution?
In chemistry, a solution is a homogeneous mixture of one or more substances (solutes) dispersed molecularly in a sufficient quantity of dissolving medium (solvent). So a chemical solution is a mixture of two or more chemicals.
