Five aspects of packaging material knowledge will give you a comprehensive understanding of self-adhesive labels!
Guide: The adhesive label is an important embodiment of the company's image and brand, which plays an important role in reflecting the product quality and arousing consumers' desire to buy. Here are five aspects to fully understand the adhesive label, and the content is for friends to refer to when purchasing the premium packaging system:
The self-adhesive label has the advantages of no brushing, no paste, no dipping in water, no pollution, saving labeling time, etc. Self adhesive is a kind of material, also known as self-adhesive label material. It is made of paper, film or other special materials, with adhesive on the back and silicon protective paper as the backing paper. And after printing, die-cutting and other processing, it becomes a finished product label.
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01 Development history of adhesive
In the 1930s, self-adhesive materials were first applied in the United States. Due to the growing demand for this special composite material, self-adhesive printing has gradually evolved into an independent printing field. More and more enterprises at home and abroad are engaged in professional self-adhesive label printing.
In recent years, China's printing industry has developed unprecedentedly in terms of production scale, technical level and market space, which has driven the development of self-adhesive printing to an unprecedented level.
02 Structure of adhesive label
The surface material is the carrier of the self-adhesive label content, and the back of the face paper is coated with adhesive. There are many materials that can be used for surface materials, generally including coated paper, transparent polyvinyl chloride (PVC), electrostatic polyvinyl chloride (PVC), polyester (PET), laser paper, temperature resistant paper, polypropylene (PP), polycarbonate (PC), kraft paper, fluorescent paper, gold plated paper, silver plated paper, synthetic paper, aluminum foil paper, fragile (anti-counterfeiting) paper, textured paper, cloth label (Tyvek/nylon) paper, pearlescent paper, sandwich coated paper, and heat sensitive paper.
The film materials include transparent polyester (PET), translucent polyester (PET), transparent oriented polypropylene (OPP), translucent oriented polypropylene (OPP), transparent polyvinyl chloride (PVC), lustrous white polyvinyl chloride (PVC), matt white polyvinyl chloride (PVC), synthetic paper, lustrous gold (silver) polyester, and matt gold (silver) polyester.
Adhesives include general super viscosity type, general strong viscosity type, strong viscosity type for refrigerated food, general reopening type and fiber reopening type. On the one hand, the adhesive can ensure the proper adhesion of the base paper and the face paper, on the other hand, it can ensure that the face paper can have a solid adhesion with the paste after being stripped.
Base paper material
Release paper is commonly known as "base paper". The base paper can isolate the adhesive, so it is used as the attachment of the face paper to ensure that the face paper can be easily stripped off the base paper. Commonly used are white, blue and yellow glassine or onion, kraft paper, PET, coated paper and PE.
03 Main fields of adhesive
Price label, product description label, shelf label, barcode label, drug label, etc.
Shipping mark label, postal parcel, letter package, shipping goods mark, envelope address label, etc.
Paint material marks, gasoline engine oil product packaging marks and marks of various special solvent products.
Electronic and electrical industry
There are many durable stickers on all kinds of electrical appliances, which are large in unit area and large in number. In addition, self-adhesive labels are also widely used as illustrative signs of industrial products (computers, etc.), which also drives the demand for self-adhesive labels.
In recent years, the logistics industry is rising in China. Modern logistics needs more and more variable information printing labels, such as storage and transportation labels, luggage labels, etc.
Drug packaging has increasingly adopted self-adhesive labels. With OTC sales of over-the-counter drugs, drug manufacturers and consumers pay more attention to drug packaging, which will, to a large extent, promote drug manufacturers to accelerate the pace of conversion from traditional labels to self-adhesive labels.
Anti counterfeiting labels, confidentiality labels, anti-theft labels, etc.
04 Material selection of adhesive
A small sticker is often an important embodiment of the company's image and brand, which plays an important role in reflecting product quality and arousing consumers' desire to buy. So what are the precautions for choosing labels or self-adhesive labels?
Questions to pay attention to when selecting self-adhesive label materials:
(1) For cylindrical bottles, especially those with a diameter less than 30MM, the materials should be carefully selected.
(2) If the label size is too large or too small, the actual test shall be carried out.
(3) If the object to be pasted is an irregular surface or even a spherical surface, there are specific considerations for the type, thickness and adhesive of the label material.
(4) Some rough surfaces such as corrugated boxes will affect the labeling, and the varnish on the corrugated box surface will also have an impact.
(5) Labels of automatic labeling machine can be labeled if necessary.
(6) Even if the label is affixed at room temperature, it should be noted whether the label has experienced high temperature during export transportation and use.
(7) The characteristics of the adhesive will be affected by the environment with more water or oil. Pay attention to the environment and temperature of the label.
(8) Plasticizer may seep out from the surface of soft PVC, so special attention shall be paid to the selection of appropriate adhesive.
05 Removal method of adhesive
The way to remove the adhesive is to first remove the adhesive surface material with a blade or an ink shovel, then use gasoline or acetone to remove the adhesive residue, and then use a cloth dipped with gasoline or acetone to wipe the adhesive residue.
Gasoline and acetone are good organic solvents, which can dissolve self-adhesive glue. The main component of self-adhesive glue is acrylic latex. However, gasoline and acetone are flammable and volatile, so pay attention to fire prevention when using them.
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