What is release lacquer?
What is release lacquer?
Release Lacquer is a solvent based air drying lacquer. It is used in the production of transfer foil. First Pet film is coated with Release Lacquer and then printed with the required design which is to be transferred to substrates like Pet Bottles, PP materials (Containers & Jars)
What is cold sealing?
Cold seal is a water-based cohesive coating used to seal a variety of paper and film packaging materials. Cold seal is a self-seal adhesive only requiring pressure to seal. As the name implies, cold seal does not require heat. That residue in the seal area is likely cold seal (or cohesive) coating.
How do you use cold seal?
Cold seal adhesives are primarily used to seal heat sensitive items like chocolate bars. The adhesive is normally applied wet to the substrate by a revolving gravure cylinder, immediately dried in an extended oven before it is reeled up at the end of the press.
What is cold seal lamination?
Cold-seal packaging is a complex package. It often involves two films, one reverse-printed with the brand owner’s graphics and a second that provides the barrier to protect the product inside. These two films are then laminated together to produce a single inseparable web.
What is ultrasonic sealing?
Ultrasonic sealing technology uses acoustic vibrations to generate heat at a molecular level inside of the film itself. This molecular friction allows the material to seal without the need for direct heat on the material from the VFFS seal jaws. Also, it is capable of sealing through product caught in the seals.
What is the difference between a hot seal and a cold seal for a blister pack?
The primary advantage of cold seal technology is speed. The cold seal process can be as much as 10 times faster than heat seal packaging. For manufacturers, processing time with cold seal adhesives is faster because the production lines don’t have to wait for the heat to generate at startup.
How does ultrasonic sealing work?
What is Alu Alu packing?
Alu-alu packing meaning aluminium foil at upper and lower side of pack as shown in image below. Alu-Alu Packing Example. Blister Packaging: Lower side is of aluminium foil and upper side side is of PVC material as shown in image below. PVC may be of transparent or amber color or any other as per requirement.
What is the difference between thermoforming and cold forming?
Thermoforming is a technique that involves heating sheets of PVC prior to insertion into a blister machine. Cold forming is a technique that does not involve any application of heat. Unlike the thermoforming method that uses clear PVC, this technique uses thin sheets of laminate film that contain aluminum.
Why are cold seals used for confectionary products?
The cold seals are designed to seal to a wide range of confectionary and snack foods where non- corona treated Polypropylene is normally adopted as the base film. The adhesives have also been carefully formulated to provide low foaming, high bond strengths, with a long shelf life in both the wet and dry film state.
What can cold seal adhesives be used for?
Cold seal adhesives are primarily used to seal heat sensitive items like chocolate bars. The adhesive is normally applied wet to the substrate by a revolving gravure cylinder, immediately dried in an extended oven before it is reeled up at the end of the press.
Why is natural rubber latex used in cold seal?
It is important to ensure the natural rubber latex is ‘protected’ to improve the mechanical stability as the cold seal is subjected to high levels of shear where the doctor blade removes the excess adhesive from the gravure cylinder.