For thermal labels hot melts

Reduction of CO2 emissions and improvement of workability without mold release paper

Thermal labels using TOYOCHEM 's hot melts can reduce CO2 emissions by about 60% compared to general water-based adhesive labels because of their release paper-free configuration. It also contributes to the improvement of workability in terms of waste reduction and the handling of raw material rolls.

What is a thermal label?
Advantages of hot melts thermal labels
Performance of hot melts for thermal labels
Other common labels

What is a thermal label?

The most commonly used label for beverage and food containers is the "self-adhesive label". Adhesive labels are attached to containers by peeling off the release paper and crimping the adhesive surface. On the other hand, a "thermal label" is a label that does not have adhesive properties at room temperature, but activates the adhesives when heated, and can be attached to containers. A special labeler is used to heat the adhesives side and label the container.
Thermal labels are broadly classified into two types depending on the type of adhesives used: "delayed tuck type" and "hot melts type".

Composition of self-adhesive labels and thermal labels

What is hot melts?

It is a adhesives that is solid at room temperature, but melts into liquid when heated and solidifies again when cooled.
See below for a detailed explanation.

What is Hot-melt? Environmentally friendly adhesives

What is the difference between adhesives, pressure sensitive adhesives, and hot melts

Advantages of hot melts thermal labels

	hot melts Thermal Label	adhesive labels	Delayed tuck thermal label
CO2 emissions	◎	△	◎
Biomass conversion	〇 Compatible (biomass content 50% or more)	〇 Yes	× bad
Presence or absence of controlled substances (DHCP)	〇 Not Contained	〇 Not Contained	× containing
Presence or absence of release paper	without ・Waste reduction ・Improvement of transportability of raw materials ・Lengthening of raw material is possible. (= Reduction of the frequency of roll switching)	existence	none
Labeler	Thermal Labeler	Self-adhesive labeler	Thermal Labeler
Handling precautions	-	-	Fear of × Powder Blowing Phenomenon

Comparison with self-adhesive labels

The absence of release paper has advantages in terms of environmental friendliness and workability

粘着ラベルと感熱ラベルのCO2排出量の比較 — CO2 emissions when using labels

By using hot melts, the drying process at the time of coating is not required, and by eliminating the absence of release paper, it is possible to reduce CO2 emissions during production by about 60%.
Example: If 100 million units are produced with a label area of 5 cm × 20 cm: 415 tons reduction * Adhesive label: 685 t Thermal label: 270 tons

In addition, the configuration that does not require release paper leads to advantages such as reducing waste, improving the transportability of raw material rolls, and reducing the frequency of roll switching by lengthening them.

* Calculation conditions (1) Adhesive label (water-based) ... Basis weight: Paper label 85g/㎡, Release paper: Paper 50g/㎡ + PE 30μm, Coating amount: 20g/㎡ (DRY), Solid content: Acrylic 60% (with drying process), Process paper: Basis weight 300g/㎡ (used 10 times) (2) Thermal label... Thickness: Paper label 85g/m2, hot melts Usage: 12g/㎡

Comparison with delayed-tuck thermal labels

Although they share the common point that they are configured without release paper, hot melts-type thermal labels have the following advantages:

Delayed Tack	Difficult to convert to biomass May contain DHCP (dicyclohexyl phthalate), which is a restricted substance Since powder spraying is generated from the label, cleaning the labeler and staining the surface of the label is generated.
Hot-melt	Biomass conversion possible Does not include DHCP No powder blowing from the label

Performance of hot melts for thermal labels

LABELMELT ™ BL-8506A (under development) Basic physical properties

viscosity	(150°C) 5,300mPa・S (160°C) 4,000mPa・S
Softening point	72℃
Hue	Pale yellow
biomass degree	50% or more

Adhesive performance

Label base material	Substrate	Adhesion (N/15mm)
paper	glass	Breaking paper
	CPP	Breaking paper
	PET	Breaking paper
OPP	glass	2.2 (Agglomeration)
	CPP	2.5 (agglomerate)
	PET	2.9 (agglomerate)
PET	glass	4.9 (agglomerate)
	CPP	3.5 (agglomerate)
	PET	4.1 (Agglomeration)

* Sealing conditions: 100°C, 0.1 MPa, 0.3 sec.

Other common labels

Depending on the shape of the container, material, design, production process, etc., the following labels are also used.

roll label	This is a type of label that is coated with hot melts at both ends of the label and wrapped around the container. It is possible to reduce CO2 emissions by making labels thinner and eliminating release paper. Learn more about our roll label hot melts
shrink labels	After the tubular label is placed on the bottle, it is heated with steam to shrink the label and wrap it around the container. It can be used for irregular containers and has excellent design.
glue label	It is a label that is applied while applying glue dissolved in water to a paper label. Waste is low, and glue is relatively inexpensive.

Inquiries

TOYOCHEM CO., LTD. Packaging and Industrial Materials Sales Division Address Sales Department

TEL: +81-3-3272-3497

TOYOCHEM CO., LTD.