What is thermal double-sided tape? What are the types of thermal tape? What are the characteristics? How to choose?

What is thermal tape?

The main purpose of double-sided tape is to paste the surfaces (contact surfaces) of two objects together, which can be divided into temporary fixing and permanent bonding according to actual requirements. Double-sided tape is a roll-shaped adhesive tape made of paper, cloth, film, foam, etc. as the base material, and then evenly coating the adhesive on both sides of the above-mentioned base material. Paper (release film) consists of three parts. Depending on the substrate, some substrates require surface treatment before gluing.

Due to the wide selection of substrates and adhesives and the possibility of different combinations, there are more types of double-sided tapes than other types of tapes.

Overview of the classification and characteristics of double-sided tape:

  1. Double-sided tape for PET substrate: good temperature resistance and strong shear resistance, generally long-term temperature resistance 100-125 °C, short-term temperature resistance 150-200 °C, thickness is generally 0.048-0.2MM, suitable for nameplate, Bonding of LCD, decorations and decorative parts.
  2. Double-sided tape for non-woven substrates: good viscosity and processability, generally long-term temperature resistance of 70-80 °C, short-term temperature resistance of 100-120 °C, thickness is generally 0.08-0.15MM, suitable for nameplates, plastic stickers Heating, automotive, mobile phone, electrical appliances, sponge, rubber, signage, paper products, toys and other industries, home appliances and electronic instrument parts assembly, display lenses.
  3. Double-sided adhesive without substrate: it has excellent bonding effect, can prevent falling off and excellent waterproof performance, good processability, good temperature resistance, short-term temperature resistance 204-230 ℃, general long-term temperature resistance 120-145 ℃ , the thickness is generally 0.05-0.13MM, suitable for the bonding of nameplates, panels and decorative parts.
  1. Foam double-sided adhesive: refers to a double-sided adhesive formed by applying strong acrylic adhesive on both sides of the foamed foam substrate, and then covering one side with release paper or release film. Forming paper or release film is called sandwich double-sided tape, and sandwich double-sided tape is mainly used to facilitate double-sided tape punching. Foam double-sided tape has the characteristics of strong adhesion, good retention, good waterproof performance, strong temperature resistance and strong UV protection. Foam foam substrates are divided into: EVA foam, PE foam, PU foam, acrylic foam and high foam. The glue system is divided into: oil glue, hot sol, rubber and acrylic glue.
  2. Hot melt adhesive film: It has good consistency, uniform bonding thickness, no solvent, easy processing, good adhesion to many objects, thickness is 0.1MM, color is translucent/amber, hot Melt softening temperature 116-123 ℃. It is suitable for the bonding of nameplates, plastics and hardware. Good results can also be obtained by bonding on uneven surfaces. The recommended initial bonding conditions are: temperature 132-138 ℃, bonding time 1-2 seconds, pressure 10 -20 psi.

How to choose thermal double-sided tape?

Speaking of double-sided tape brands, there are many on the market, but double-sided tape brands with good reputation and guaranteed products still need to be carefully compared to determine. The same is true when choosing double-sided tape. You need to shop around and choose a double-sided tape with guaranteed quality and environmental protection according to your own needs, so you can use it with confidence!

There are many types of double-sided tapes and a wide range of applications, but because each type of double-sided tape uses different adhesive materials, the fields of application of each type of adhesive are different. Therefore, when purchasing double-sided tape, you must not only choose the brand, but also choose according to the function used!

Double-sided tape is a very practical invention in modern society, whether it is mobile phones, computers, etc. in the electronic market, or decorative strips and parts in the automotive market, and then to hooks, furniture, toys, etc. in the home market, double-sided tape all play an irreplaceable role.

What is substrateless thermal double-sided tape? What is the function of substrateless thermal tape? What are the features?

Double-sided tape is well-known as a daily packaging material, and it is very convenient to use. It is deeply loved by us and has a wide range of applications. Double-sided adhesives can be divided into substrate double-sided adhesives and non-substrate double-sided adhesives according to the substrate. The previous CoolThermo thermal conductive silica gel introduced organic double-sided adhesives “What is thermally conductive double-sided adhesive? The content of “Introduction to the Process Principle and Application Characteristics of Thermal Double-sided Adhesive Tape”, today Nuofeng Thermal Conductive Silica Gel will share it!

Overview of Double-sided Adhesives Without Substrates

The double-sided tape without substrate is made of water-resistant kraft paper, white glassine paper or transparent PET that is directly coated with acrylic adhesive and then attached with polymer coating without any medium. The color of this tape is transparent, The thickness is very thin, has good bonding ability, can effectively prevent falling off, has good waterproof performance, can be processed, strong temperature resistance, dimensional stability, thermal stability, good chemical stability.

The substrate-free thermally conductive double-sided adhesive comprises: an adhesive tape and a release film, the release films are arranged on both sides of the adhesive tape; the adhesive tape is composed of a colloidal matrix and a thermally conductive material, and the colloidal matrix is pressed into a sheet shape. The non-substrate thermally conductive double-sided adhesive has the advantages of high reliability, good thermal conductivity, high temperature resistance, convenient manufacture, easy pasting, convenient punching, and low price. At the same time, it has a broad market prospect in the electronics industry.

Characteristics of non-substrate double-sided tape

  1. Colorless, transparent pure film tape;
  2. Initial stickiness, good continuous stickiness;
  3. High cohesion, good plasticization resistance and excellent die-cutting performance;
  4. No glue residue, glue overflow, chemical stability, resistance to organic solvents, disinfectants, oils, weak acids, salt erosion;
  5. It can be used in various harsh environments for a long time.

Substrate-free double-sided tape application

  1. Nameplates, labels, signs: used in screen printing, advertising, aviation, medical and industrial equipment, automobiles, home appliances, electronic markets and other industries;
  2. Soft board FPC: used in mobile phones, notebook computers, PDAs, digital cameras, LCMs and other electronic products;
  3. Membrane switches: membrane switches of flexible, rigid, concave and convex categories;
  4. Shockproof foam: good initial viscosity and stickiness, high cohesion, and good plasticization resistance.

When using double-sided tape without substrate, attach the tape to the surface to be bonded, and after pressing, peel off the release paper, which provides strong adhesion, high temperature resistance, high solubility, and excellent weather resistance. It is effective when combined with various substances, and the punching processability is also good.

What are the factors that affect the adhesiveness of thermally conductive double-sided adhesives tape?

For the thermal tape, in addition to exerting good thermal conductivity in the product, the viscosity of the thermally conductive double-sided adhesive is also very important. It plays the role of bonding the heating device and the heat sink, affecting the thermal conductivity What are the factors of the adhesive stickiness?

The factors that affect the adhesiveness of thermally conductive double-sided adhesive during the use process are mainly use problems and operation methods. Let’s learn about it together!

Use ambient temperature:

The use environment will have a greater impact on the viscosity of the thermally conductive double-sided adhesive. Generally, the adhesion performance is better in a high temperature environment. The viscosity of the thermally conductive double-sided adhesive is divided into initial viscosity and permanent viscosity. The initial viscosity guides the viscosity of the thermally conductive double-sided adhesive. The initial viscosity of the bonding at room temperature is 60%, and it needs to be placed statically for 22-24 hours, so that the adhesiveness of the thermally conductive double-sided tape will be maximized (the thermally conductive double-sided tape does not need to be placed statically when the temperature is heated to 40°C). ). Permanent tack is the tack, bond strength of thermally conductive double-sided adhesives that increases with time and temperature.

How to use:

The wrong operation of the thermally conductive double-sided adhesive will affect its viscosity, so the contact surface between the thermally conductive double-sided adhesive and the PCB and the radiator should be kept clean during use. Simply wipe it clean, because any dust on the contact surface will reduce the viscosity of the thermally conductive double-sided adhesive.

At the same time, the thermally conductive double-sided tape has two sides of release paper. Before use, tear off one of the release papers and then align the PCB. Then tear off the other side of the release paper, and then bond the thermally conductive double-sided tape to the heat sink. After it’s done, press down moderately and squeeze out the air in the gap to maximize its viscosity.

Both the use environment and the way of use will have a certain impact on the adhesiveness of the thermally conductive double-sided adhesive. Therefore, in the process of purchasing thermally conductive double-sided adhesives, this factor must be taken into account. It is necessary to ensure that the thermally conductive double-sided adhesive can play a good role in bonding and thermal conductivity. effect.

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