Knowledge summary of the hottest self-adhesive pri

2022-08-10
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Self adhesive printing material knowledge summary

self adhesive label materials are divided into paper self-adhesive labels and film self-adhesive labels according to surface materials. With the acceleration of industrialization and the enhancement of people's awareness of environmental protection, film self-adhesive materials have sprung up. The choice of film surface material is related to many factors, such as application environment, adhesive, substrate characteristics, etc.

in mold label materials are divided into four types according to material characteristics: BOPP, pp+pe, PE and paper. Due to different treatment characteristics of materials, the application effect is also different

1. BOPP: two-way stretching deformation, special coating on the surface, and good printability. The disadvantage is that it is easy to deform when applied to large-area containers. If the can body material is PE and the label material in the mold is PP, orange peel will appear on the surface of the can body after the label is applied because the shrinkage rate of the two is different

2.pe: without stretching, the material surface needs corona treatment, poor printing adaptability, and large deformation after hot stamping. Because it is PE material, it will not deform after being applied to PE bottle body in response to made in China 2025

3.pp+pe: unidirectional tensile deformation, material surface needs corona treatment, good printability, stable tension. Since the material contains PE, it is required to use low-temperature bronzing foil in the label bronzing process. The biggest advantage is that the label has smooth surface, no deformation and good visual effect after application

4. paper: used in low-grade packaging products, suitable for non deformed or small deformation barrels. The commonly used materials are high-grade coated paper, and the printing suitability of paper materials is good

the label material in the mold has two appearances according to the different application scope

1. Smooth surface material: suitable for the shape of curved bottle body, because the curved bottle body can exhaust naturally when contacting with the label in the process of bottle blowing, and there will be no bubbles and wrinkles

2. Rough surface material: it is artificially printed or rolled, with regular and fine patterns, which is suitable for flat bottle bodies. When the flat bottle body is in contact with the label in the bottle blowing process, the air can be naturally vented through the through small patterns, without bubbles and wrinkles

Japanese Yupo synthetic paper

(1) characteristics of labels in the mold of Yupo synthetic paper

a. it is made of polypropylene PP as raw material and inorganic filler by biaxial stretching, which has the characteristics of paper and plastic film; Compared with ordinary paper, it has better acid and alkali resistance, water resistance, oil resistance, mold resistance and friction resistance

b. it is completely attached to the container, and even the edge of the paper with special shape has no bulge and is not easy to fall off

c. uncoated processing, there is no problem of coating peeling, the back adhesive layer is easy to exhaust stripes, the molding time is short, and the efficiency is high

to ensure that the flow direction can be controlled. D. excellent weather resistance, it will not change color or crack under the harsh outdoor environment such as ultraviolet light, and it will not be used or stored for a long time

e. the smoothness, flatness and thickness of the surface height have excellent compatibility with the adhesive

f. the surface is smooth and the whiteness is high, which can faithfully reflect the printing effect. Suitable for rotary offset printing and flexo printing

g. self adhesive products of different grades can be used for permanent adhesives and removable adhesives

h. for offset printing, small and medium batch label products, gravure printing is recommended if large batch printing; UV printing is recommended if ink requirements are high

(2) Yupo synthetic paper mold internal standard Jinan new era assaying Instrument Co., Ltd. elastic bandage tensile tester is applicable to the tensile property testing of various knitted fabrics of the same type. The purpose of the label is

A. The purpose of daily products

● food use: frozen food label (ice cream box)

● daily medical use: shampoo, hair conditioner label, drug description label

● clothing use: advertising label Size label

b. industrial use

● automotive use: battery label, wire label, tire label

● electronic appliance use: description label, warning label

● container label: iron bucket label, chemical container label, oil bucket label

(3) printing of Yupo IML

a. Yupo IML in mold labels generally use offset printing, flexographic printing and gravure printing. Japan mostly adopts UV offset printing, UV rotary printing and gravure printing; In China, ordinary offset printing, flexo printing, gravure printing and post press polishing are mainly used

b. it is recommended to keep the humidity at 50%-60%, or use a static eliminator to eliminate static electricity

c. Yupo in mold label printing requires final polishing, and the surface polish can improve the smoothness, so that the labels do not stick to each other

Avery Dennison film label

patented film products primax and FasClear are transparent and white polyolefin multilayer composite in mold label films respectively, which are functionally divided into printing layer, core layer and adhesive layer. The surface of the printing layer can provide excellent printability, the core layer determines the stiffness and transparency of the label, and the adhesive layer ensures the excellent composite performance between the label and the bottle body

(1) characteristics of Allie film label

a. the label and the bottle body are on the same surface, and the color pattern is like being directly printed on the surface of the bottle body

b. thin film materials, especially primax and FasClear materials that can stretch and shrink and deform, will deform with the deformation of the plastic bottle body when applied, and there will be no label wrinkling

c. the surface of the film material does not absorb ink, and the printed label has bright color and strong three-dimensional sense, and the color effect is better than that of paper

d. the label in the film mold has good environmental protection, and the label and bottle body can be melted at the same time, which is suitable for recycling. Accelerate the development of petrochemical deep processing industry chain

e. corona treatment has good printing adaptability, suitable for all kinds of printing and processing, and suitable for labels on cosmetics and daily chemical products

(2) manufacturing process of Eli film materials primax and FasClear

a. put plastic particles of BOPP and PE into the extruder to melt and squeeze them into the casting device respectively

b. the solution is mixed in the casting device, and the mixed solution flows out through the gap of the casting device through compressed air

c. cool and thin the film through the cooling roller

d. after the film machine is stretched and shaped by the directional stretching device, a film that can only be deformed longitudinally will be formed

e. improve the surface tension of the film by corona device

f. it can be rolled into a film material that can be printed or coated. Sanding, pearlescent and plain synthetic paper

(1) characteristics of sanding, pearlescent and plain synthetic paper

a. the surface of the sanding label is matte, and the sanding grain has anti-skid effect, which effectively prevents the occurrence of bottle body sliding; Flat label is ordinary paper effect; The surface of pearlescent label is in natural pearlescent color, which has strong anti-counterfeiting function

b. general offset printing, gravure printing, flexo printing, etc. are used for surface printing. After printing, it only needs to be coated with varnish to achieve a certain firmness, eliminating the film covering process after traditional polymer substrate printing, and reducing the label production cost

c. its advantage lies in its superior surface performance, which is more suitable for offset printing. It has a wide range of products, a variety of products, and is made locally with high cost performance

d. the disadvantage is the poor stiffness, which is limited in the application of high-end products

(2) the product is mainly used in

a. washing and cosmetics. Such as: shampoo, conditioner, bath liquid, washing liquid, kitchen detergent, etc

b. trademarks and descriptions of large capacity blow molding barrels and injection containers for chemical raw materials, pesticides, coatings, lubricants, etc

c. labels and instructions of plastic barrels, bottles and boxes of salad oil, ice cream, condiments, soy sauce, vinegar, etc. in food containers

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