Luminescent tape —— How much do you know？

Luminescent tape is made of aluminate system, silicate system and sulfide / sulfur oxide system. It can also be called luminous tape, glow in the dark tape and photoluminescent tape.

In the natural light, fluorescent lamps, incandescent lamps and other light sources after a certain period of time, can continue to shine overnight, people have been accustomed to call it luminous film.

According to their application, they can be divided into two categories: organic light emitting products made of organic materials and inorganic materials combined with inorganic products.

The main application environment of light emitting materials is organic light-emitting products. With the expansion of applications, the varieties of luminous products are increasing.

In the preparation of organic light-emitting products, a lot of technical difficulties should be solved, such as:

• The contradiction between the refinement of luminescent materials and the decrease of luminescence properties
• Dispersion and poor settlement of luminescent materials due to the inconsistent density or particle size of the products
• Weatherability of organic light emitting products used outdoors
• Problems in the production of luminous products, such as uneven contraction of light emitting plate and uneven luminescence.

Photoluminescent tape structure

Luminescent tape is a kind of functional film with multilayer structure with light storing and luminescent material.

It is usually composed of transparent protective layer, luminous layer, reflective layer, pressure-sensitive adhesive layer and removable release paper layer, as shown in Fig. 1.

Each layer has different components and functions, and details are described below.

Fig. 1 Luminescent tape structure

Composition of each layer of luminescent tape

The ordinary luminescent tape is composed of five parts: transparent protective layer, luminous layer, reflecting layer, self adhesive layer and release paper layer.

The transparent protective layer is a transparent film made of organic resin, which can protect the luminous layer and improve the luster of the luminous film.

Luminescent layer

The luminescent layer is made of light storing luminescent material, carrier resin, plasticizer, auxiliary agent and solution.

The thickness of the layer depends on the use, and the brightness of the luminous film increases with the increase of the thickness of the luminous layer.

When the luminous layer reaches a certain thickness, the brightness of the luminous film is no longer increased.

The thickness of the luminescent layer is usually in the range of 0.02 ~ 2.0mm, and the mass percentage of the material is:

Carrier resin 20% ~ 95%

Light storing luminescent materials 5% ~ 80%

Plasticizer 0 ~ 60%

Additives 0 ~ 30%

In a word, the brightness of the light emitting film varies with the type of the luminescent material, the content of the luminescent material and the thickness of the luminous layer.

Reflective coating

Because the luminescence of the luminous layer spreads to both sides, the reflecting layer is added on one side of the luminous layer, and the luminous reflection of one side is emitted together with the luminescence of the other side, so that the brightness of the luminous layer can be doubled.

Reflective layer can be white or light colored film or paper, also can be light or white paint coating, white effect is best. The thickness can be controlled from 0.01 to 0.5mm.

The coating is coated with carrier resin, plasticizer, additive, pigment and filler, and the mass percentage of each component is as follows:

Carrier resin 10% ~ 98%

Plasticizer 0 ~ 60%

Additives 0 ~ 30%

Pigment 2% ~ 80%

Packing 0 ~ 40%

The adhesive layer usually selects acrylic resin or rubber resin, so that the luminous film has self-adhesive function.

The release paper is a universal coated paper, which acts as an insulating adhesive.

Method for preparing luminescent tape

There are many methods for the preparation of luminescent films. The basic principle is to disperse light emitting materials uniformly in organic medium and form thin films. There are usually three basic methods for industrial production.

Blow molding

The flow chart of the luminous film prepared by blow molding method is shown in Fig. 2.

The process is as follows:

Fig. 2 Process flow diagram of luminous film prepared by blow molding

① According to the design of the formula, weighing a variety of materials into the mixer, mixing materials evenly;

② The mixed material is made into luminous plastic granule;

③ The luminous plastic particles are sent into the extruder of the blow molding unit, heated and extruded, blown and cooled to form, and then the tube can be rolled up to obtain a cylindrical luminous film;

④ The tubular luminous film is cut open or printed with white reflecting layer to obtain the luminous film;

⑤ The transfer coating process is used to prepare the pressure-sensitive adhesive for the luminous film, and the finished product is cut and packaged.

Advantages and disadvantages of luminescent films prepared by blow molding

Advantages are mainly reflected in:

• Compact equipment and low investment;
• Width and thickness of easy control film;
• The edge effect of film without extrusion has high yield and low cost;
• The intensity of the luminous film is high.

The disadvantages are shown as follows:

• The cooling rate is too small and the film is poor in transparency.
• The film thickness deviation is larger.
• Mixing machine, extruder for material cutting larger, etc.

Calender method

Calendering is the main method for the production of plastic film and sheet, it is already close to the viscous flow temperature of plasticized thermoplastic plastics through a series of counter rotating roller gap level, so that the material under compression and extension, into a certain thickness, width and surface finish of the plastic film products.

Most of the plastics used for calendering are thermoplastic amorphous plastics, most of which are pvc.

The process flow chart of the luminous film prepared by calendering method is shown in Fig. 3.

Fig. 3 flow chart of making luminous film by calendering method 

Advantages and disadvantages of luminescent tape prepared by calendering method

Advantage is:

• It has large production capacity, high speed and continuous production
• Product quality is good
• Flexible polyvinyl chloride film with a thickness of 0.05 ~ 0.5nm and a hard polyvinyl chloride sheet with a thickness of 0.25 ~ 0.7nm
• Comparison of blow molding process

Disadvantages are:

• Huge equipment
• Higher investment
• Maintenance complexity
• In the production process, the light emitting film will be subjected to repeated extrusion and shearing, and its performance will be affected.

Spread plate

Coating method is to use luminous material and organic resin to make luminous paint.

Using coating technology, the prepared luminous resin coatings are coated on different substrates.

The coating is made of gel, plasticizing or drying process to make luminous film.

The process flow chart of the preparation of luminescent film by coating method is shown in fig. 4.

The luminescent film prepared by coating method has the following advantages:

• Linkage production line can be used;
• The production process is stable and the quality is easy to control;
• The production efficiency is high, the production speed of the linkage production line is 3 ~ 50m/min, up to 100m/min;
• It can be suitable for the production of various products. Such as film products, artificial leather, flooring and so on.

The main drawback is the relatively large equipment, auxiliary equipment more.

Fig. 4 Process flow chart of luminescent film prepared by coating method

Other methods

The luminescent tape is produced in large quantities by industrialized production method, which needs larger investment.

Small amount of luminescent tape can be made by screen printing method.

Specific methods are as follows:

① Light emitting material and transparent ink (ink blending oil) are blended into luminous ink;

② Making screen with 80~150 purpose polyester monofilament mesh;

③ Choose white, light or transparent substrates.

Using luminescent ink on the choice of good substrate printing, to ensure that the luminous coating to meet the design requirements of the thickness. If the selected substrate is transparent, a white coating is printed after the luminescent layer has been printed.

Comparison of properties of various luminescent films

The luminescent tape made of ZnS: Cu and Co light storing material in aluminate system, silicate system and sulfide system has low luminous intensity and short afterglow time, which is difficult to meet the requirement of luminous throughout the night.

For example, in German standard 67510-4, the main technical indicators of luminous properties of the luminescent film made by ZnS: Cu, Co are shown in table -1. The light resistance and weather resistance of the light emitting film are poor.

Table -1 German standard 67510-4 ZnS Cu, Co made luminous film luminous performance of the main technical indicators

The light storage material adopts ZnS and aluminate complex, and the luminescent film is not ideal.

WEALLIGHT, such as PLO, SB and REO, was used to produce blue, green, red and other color luminescent films. The films had high afterglow brightness, long afterglow time, good light resistance and good weatherability.

The luminescent properties of blue, green and red light emitting films produced by WEALLIGHT are compared with those of the previous ZnS based luminescent films by table -2.

Table -2 afterglow brightness and afterglow time of various luminous films

Note: the SB (blue) in the table refers to the light emitting film made of SB (blue) powder.

Application of luminescent tape

The new light storage luminescent materials have a wide range of applications: building decoration, transportation, military facilities, fire safety, daily life products and other fields.

Especially, it plays an important role in the field of fire safety related to people’s life and property safety.

Sep. 2002, the American “Newsweek” in the “9·11” event of the first anniversary of the 《Five Who Survived》, reported the World Trade Center South Tower survivors escape insider.

Among them, there is a description of the use of the light-emitting material produced by the luminous belt in smoke smell choking nose and dark corridor indicating the escape of people in the building. Excerpts are as follows:

Application of luminescent film in safety signs

Installation of luminous self-luminous evacuation sign system in buildings.

In June 1994, Germany developed a national standard for light storing self-luminous products (DIN67510-3) for evacuation. The standard specifies the performance requirements and setting requirements of luminous self-luminous evacuation sign system products. The standard has been adopted by European countries.

The United States is used Underwriters Laboratories UL 1994 standard, California Building Code (California Building Code) by the mandatory standard. This standard is adopted in most of the United States and some provinces in Canada.

Japan adopted the JIS Z 9100 (luminous safety signs board) standard formulated in February 1, 1987, which stipulated the performance requirements of refuge and escape sign products.

In April 2001 Chinese, People’s Republic of China Bureau of the Ministry of public security fire “building fire protection design standard”, “fire protection design of tall buildings” and “code for fire protection design of civil air defense works” by local provisions, mandatory requirements set light evacuation signs.

WEALLIGHT personalized customization service

WEALLIGHT is a customizable manufacturer of luminescent materials,

We offer ODM/OEM products

Contact us for free luminescent tape samples immediately

We website：https://weallight.com

How to buy Photoluminescent Tape

How to buy Photoluminescent Tape?

Photoluminescent Tape is more and more widely used by people all over the world, the Photoluminescent Tape can be used as Safety Signs, but also very fashionable, so the Photoluminescent Tape is used by many families and workplace!

The Photoluminescent Tape absorbs visible light, and when the light is weakened, the visible light is released, through the storage of rare earth elements in the energy level transition to achieve the effect of light, non-toxic, non-radiation, safe and environmentally friendly; can be used in the stairs, and some need to indicate the place , To prevent a sudden power outage, resulting in operational security risks; can also be made into a variety of small ornaments, placed in a child bedroom, luminous can bring children safe, accompany them to sleep peacefully; can also be used in various parties above , Add cool, and so on.

How to judge Glow In The Dark Vinyl is good or bad? In fact, is suitable for their own Glow In The Dark Vinyl, different price of the Photoluminescent Tape, the effect is naturally different.

There are a lot of people will worry about the Photoluminescent Tape will have radiation, in fact, as long as we understand the principle of radiation, we know how to determine whether the Photoluminescent Tape radiation; radiation is through the continuous attenuation of radioactive atoms, the release of energy, it seems the same effect of light, if it is phosphor into the reflective atoms, is the radiation can be excited by the Photoluminescent Tape in the rare earth element electrons, which has been shining until the radioactive atoms Decay to the stage where the human eye can not be identified.

Knowing the principle of radiation, we can easily determine whether the Photoluminescent Tape contains radioactive material; when the light on the Photoluminescent Tape disappears, the Photoluminescent Tape generally can only maintain 2 ~ 12H, and the process is more and more bleak, And radioactive material is not very easy to dim, as long as the Photoluminescent Tape can not be exposed to the place where the 24h (such as drawers), and then observe the light in the dark whether the Photoluminescent Tape, if you can see the obvious light, The description is containing radioactive elements; the other hand, it shows that there is no radioactive elements in the Photoluminescent Tape.

The luminescence time of the luminescent film is determined by the rare earth elements in the luminescent film. There is a long time, and the time is relatively short. The general time is distributed in 2-4h, 4-6h, 6-8h, 8-10h, 10-12h, This is in accordance with individual needs to buy, the general price is proportional to the time with the light;

The luminous brightness of the Photoluminescent Tape is determined by the amount of phosphor per unit area, the more the phosphor per unit area, the longer the light-emitting time, the more bright, the higher the price.

The Photoluminescent Film surface is PET, PVC, PMMA different surface film, the price of PMMA higher than PVC, PVC higher than PET.

PMMA good weather resistance, but because it is more brittle, easy to tear, the price is expensive, the application will be less.

PVC is based on the PET in the increase in a layer of PVC film, more than one material, another process, the price will be more expensive than PET. 

PVC film made of Photoluminescent Film can be used for printing, printing, printing, photo, suitable for mass printing.

PET film can be used for engraving words, not suitable for large quantities.

When you purchase Photoluminescent Tape, it is recommended to make decisions based on market demand, not necessarily the price of the better, the right is the best.

WEALLIGHT offers a variety of safety signs, including: Glow In The Dark Tape, Photoluminescent Film, Glow In The Dark Exit Signs, Fire Safety Signs, etc., according to the standard, you can also accept custom!

We offer free samples, would like to know more, now contact us!  https://weallight.com

Find Me on WhatsApp: +86 186-5973-9121

Photoluminescent Safety Signs Can Save You

Safety Signs include: emergency exit signs, fire safety signs, mandatory signs, warning signs, prohibited signs; in many emergency time, can save a lot of people’s lives.

As the Photoluminescent Safety Signs through the absorption of visible light, so as to achieve the effect of luminous. But also has: non-toxic, non-radioactive, energy saving and environmental protection and other characteristics, so the scope of application more and more widely.

All employers must ensure that the lives of employees and customers are safe, have the responsibility to tell them all the dangers in the work area, how to avoid the danger occurred in their own, and what happens after the danger to eliminate the danger; so in all office areas, factories and other places Must have a safety sign; the greater the area, the more necessary;

Assuming a large store fire, this time if there are no escape channel signs, familiar with the staff of the site may be because of panic can not find the export, not to mention some unfamiliar customers, this will be the disaster ah! So the safety signs are essential.

Let’s take a look at the use of these security signs.

Emergency Exit Signs: generally placed at a certain distance from the ground on the wall, or the floor of the landmark, there are some will hang up to indicate the location of the exit, closer to the ground is necessary because of the fire, often Smoke, because the fire smoke temperature is higher, the density is smaller than the air, are floating up, so the smoke at high, will affect the visibility of signs.

Fire Safety Signs: placed in the vicinity of fire equipment, such as fire hydrants, so that when the flames found, to find fire extinguishers in a timely manner, put out small flames in time to avoid the fire spread to the point where there is no control.

Mandatory Signs: These signs are to tell people who enter a region, must be prepared to enter before, of course, each employer must let employees know in advance, this sign is reaffirmed, emphasizing the role! The most common requirements are helmets, safety shoes, goggles and gloves.

Warning Signs: This sign is to tell us what potential danger here, individuals should take self-protection behavior, ignore these dangers is stupid behavior; such as “high-risk danger” signs, if you ignore, may be fatal!

Prohibited Signs: This sign is to tell us that those acts are not allowed, such as gas stations “forbidden fireworks”, private areas “forbidden to enter”, or some dangerous work areas need specialized training to get people, “non-technical staff, Prohibited to enter “

These signs are very important, regardless of day, or at night, have to make people clearly see; storage film safety logo, just absorb visible light, you can light in the dark 2-10Hr, during the day and night can be achieved eye-catching The role of the prompt.

Cherish life, safety will not allow the slightest sloppy. More and more people have been using WEALLIGHT Glow In The Dark Safety Signs!

WEALLIGHT offers a variety of safety signs, including: Glow In The Dark Vinyl, Glow In The Dark Stickers, Glow In The Dark Safety Exit, Glow In The Dark Fire Safety Signs, etc., according to the standard, you can also accept custom!

We offer free samples, would like to know more, now contact us!   https://weallight.com/

Find Me on WhatsApp: +86 186-5973-9121

Photoluminescence Safety Signs Seven Major Advantages

Photoluminescence Safety Signs Seven Major Advantages

More and more people use WEALLIGHT Photoluminescent Safety Signs! The pohotoluminescent film principle is actually through the atomic electron energy level transition to achieve, non-toxic, non-radioactive, energy saving and environmental protection, is the future development trend of Safety Signs;

Safe export indicator light is through the power of light, the whole working principle is controlled by a complex circuit chip. The following is the circuit diagram of the safety exit indicator:

Comparison of LED Exit Sign Light and Glow In The Dark Exit Signs several major differences:

	Glow In The Dark Exit Signs	LED Exit Sign Light
Luminous duration	2H-10H (after light)	1.5H (after power failure)
Energy consumption	Visible light	Power
Installation	Paste, no professionals	Need professional guidance installation
Service life	Indoor more than 10 years	Over 3 years
Maintenance	No need	Professionals regularly check for maintenance
Environmental protection	Non-toxic, non-radioactive	Nickel - cadmium batteries waste pollution of the environment
Reliability	High, without any impact	Low, affected by the circuit

In summary, we obviously see: light long time, low energy consumption, simple installation, long life, cost-effective, high reliability, environmental protection is the advantage of the Glow In The Dark Exit Signs;

As the fire, the elevator is not as safe as the stairs, the same emergency exit indicator light as the luminous safe exit is reliable; well known, electrical equipment in the event of a disaster, very easy to damage, our Safety Exit Signs is for the accident when we can escape, It is not allowed to occur if the Safety Exit Signs can not be used.

Disaster is always caught off guard. Such as: In 1993, following a cruise ship fire that killed 158 people; In 2003, The World Trade Center Building Code Task Force submitted its report of the 9/11 attack.

If we are unfortunate to meet the fire, even more unfortunately, this time the emergency exit indicator light due to battery failure can not indicate the intersection, it would be how unfortunate thing; The most unfortunate is that the lights have been checked out in advance, but because of the need for professional maintenance, but not timely maintenance, resulting in a disaster, can not find the export, I think this is what we do not want to see.

Photoluminescent Emergency Exit Signs, just absorb visible light, can light in the dark 2-10Hr, indoor life of up to 10 years, easy to change, paste it, you can quickly find the escape channel within 10 years.

Cherishes life, safety will not allow the slightest mistake. Safety awareness of strong people, have been in the use of WEALLIGHT Photoluminescent Safety Signs.

WEALLIGHT offers a variety of safety signs, including: Glow In The Dark tape, Glow In The Dark Vinyl, safety exit signs, fire safety signs, etc., according to the standard, also accept custom!

We offer free samples, would like to know more.  Now contact us! https://weallight.com

Glow In The Dark Vinyl -- how much do you know?

Glow In The Dark Vinyl -- how much do you know?

The Glow In The Dark Vinyl, also known as photoluminescent film, as the name suggests, it is able to light the material at night, by absorbing the visible light, and then released in the dark, it is easy to see in the dark night; mainly for safety signs, Emergency Exit Signs, fire safety signs, staircase signs, etc.

So what is its working principle, harmful to the human body?

First of all, I have to explain that it is non-toxic, non-reflective material, will not have any harm to the human body!

Want to thoroughly understand a material, the most direct way is to dismember it.

Storage film is composed of mask layer, storage layer, white layer, adhesive layer, from the type of protective layer.

1. Mask layer is the role of protection of light storage layer, the second can be in the above lettering, engraved patterns;

2. Light storage layer, that is, the core of the photoluminescent film, it is composed of phosphor and glue together; their role is to store light and released light;

3. White layer, also known as the reflective layer, the role is to light the light emitted by the light reflected out, so that the light storage film looked brighter;

4. Adhesive layer can be used to affix the object you want to paste above;

5. Dependent protective layer is to protect the adhesive layer is not contaminated;

It seems that the storage layer is the core of the principle of light-emitting film of the light-emitting, and the core of the storage layer is the phosphor; phosphor, also known as luminous powder, it is derived from rare earth elements;

Rare earth element light principle, in fact, through the rare earth element atomic electron energy level transition to achieve, that is, when there is light, the energy level of low electron absorption can reach its energy level transition energy, jump to high energy orbit; After the disappearance of the electrons reaching the high-level orbit, the energy is transferred to the low-level orbit, and this process is repeated all the time.

In other words, the luminescent light storage principle is actually through the atomic electron energy level transition to achieve, non-toxic, non-radioactive. Because it does not rely on electricity, it is far more reliable than the electronic security logo, but also energy saving!

Visionary people know that Glow In The Dark Exit Signs have become a Emergency Exit Signs of the mainstream products.

We have to provide free the luminous film samples, would like to know more, now contact us!  https://weallight.com