Bottomless paper labels are labels without backing paper, printing the graphic part of the self-adhesive labels first, and then in the printed surface of the self-adhesive labels coated with a layer of silicone oil, and then coated with a layer of hot-melt adhesive, to prevent self-adhesive labels from sticking to each other; set up a tear line on the label to facilitate the tearing, and then finally wind up the rolls.

Silicone oil on the surface of the self-adhesive has a waterproof and anti-dirty effect, the graphic information on the surface of the opposite material plays a protective role, greatly improving the effect of printing. The emergence of self-adhesive labels without backing paper from the source to completely reduce the harm to the environment brought about by the backing paper, to meet the user's dual requirements for economic and environmental protection, once launched will be widely concerned about and praised, and quickly become a hot topic in the field of self-adhesive labeling materials.

In the sustainable development trend and improve the efficiency of the dual demand, bottomless paper labeling technology after nearly 20 years of development is more and more mature, the application field is also more and more extensive. Currently on the market the mainstream three bottomless paper labeling applications, including: bottomless paper labels in the decorative market, bottomless paper labels in the field of food packaging, bottomless paper thermal printing labels in the field of food packaging. Especially driven by the rapid growth of end-use applications such as grocery stores, logistics and fast food restaurants, the latter two are developing rapidly, with an annual growth rate of about 15%.

Advantages of bottomless paper labels

1. No backing paper costs compared with traditional self-adhesive labels, backing paperless labels have no backing paper, Grazin backing paper costs zero, to achieve energy saving and emission reduction. Reduces the felling of large adult trees, reduces the consumption of fresh water and other energy sources, and reduces carbon emissions. Coupled with other cost reductions, in line with the concept of green printing.

2. Reduce the cost of labeling face material traditional self-adhesive labels in order to facilitate the discharge of waste, or to facilitate the follow-up printing tracking, will leave a certain amount of blank space between the labels and the edges of the label, in which case the area of the face of the raw material will increase, about 8% or so. Bottomless paper labels do not have any loss of face material, because the production process it is not necessary to discharge waste, it is through the label and the label between the preset tear line to achieve easy tearing. It can save 30% of the raw material cost. Make the whole cost savings of about 10%.

3. Reduce the cost of transportation and warehousing because there is no bottomless paper label face material without any loss, plus no Grazian backing paper, so the same size of the roll core can accommodate more labels, about doubling the label, the same width and thickness of the roll material than the traditional self-adhesive roll material more than 50% of the labels, so as to reduce the storage of labels in the space, reduce the logistics cost of transporting labels and save money.

4. Improve work efficiency of the same size roll core can accommodate more labels, so when using the bottomless paper labels, do not need to change labels frequently, reducing the labeling process downtime to change the roll time, effectively improve the number of labels per unit of time, so that the efficiency of the factory is greatly improved.

5. Reduce the wear and tear of the print head. In the bottomless paper labeling surface in order to prevent sticking, will be coated with a layer of silicone oil on the surface of the surface material, this layer of silicone oil reduces the friction between the print head and the surface material, reduces the wear and tear of the print head, saving the cost of printing.

Bottomless paper labeling problems

1. Coating equipment requirements are higher according to the process requirements of the bottomless paper label, the existing silicone oil and glue coating equipment is difficult to meet the requirements, which requires coating equipment suppliers to re-develop new equipment to help manufacturers of bottomless paper labels to successfully complete the production.

2. Label shape single due to the interconnection of the bottomless paper label is dependent on the serrated tear line to achieve, so the more mature shape is limited to a rectangular one. Self-adhesive labels on the market is often a variety of shapes, only rectangular is unable to meet market requirements.

3. Automatic labeling machine needs to be redesigned to use the bottomless paper labeling automatic labeling machine in the separation of the location of the label needs to be redesigned, tear line width design is too small, there will be a tear line is not easy to tear, resulting in labeling line downtime. Tear line width design is too large, after tearing will form obvious burr edge, affecting the beauty of the entire product packaging.

4. Tear line burrs left behind to affect the aesthetics of the packaging of goods at present the world's most advanced tear line process, the minimum width of 0.3mm or more, too small, then the label can not be supported between. So bottomless paper labels between the tear line after use, will leave obvious burrs on the edge of the label, which affects the aesthetics of the packaging of goods, greatly narrowing the scope of application of bottomless paper labels, which is why bottomless paper labels are difficult to the appearance of high-quality requirements of the daily chemical industry to promote the reason.