阅读说明：本技术 磁热减粘型胶带的制备方法 (Preparation method of magnetic-thermal viscosity-reducing adhesive tape ) 是由 罗培栋 王立超 于 2019-09-20 设计创作，主要内容包括：磁热减粘型胶带的制备方法,该制备方法步骤如下：S1：准备基胶,该基胶为UV固化压敏胶；S2：将纳米Fe<Sub>3</Sub>O<Sub>4</Sub>与表面活性剂KH570混合,搅拌均匀后干燥,得到磁性微球；S3：将基胶、磁性微球、热膨胀微球混合均匀,其中磁性微球的质量为基胶质量的3%-5%,热膨胀微球质量为基胶质量的2%-10%；S4：将S3获得的产品涂覆到底膜上,经UV固化获得磁热减粘胶带。本发明的减粘型胶带,FeC颗粒在交变磁场下能产生一定的热量,所述热量源于FeC颗粒在交变磁场下出现涡流损耗、磁滞、磁矢量旋转和颗粒本身的物理旋转,因此不用外加热源,只需施加交变磁场即可。(The preparation method of the magneto-thermal viscosity-reducing adhesive tape comprises the following steps: s1: preparing a base adhesive, wherein the base adhesive is a UV curing pressure-sensitive adhesive; s2: mixing nano Fe 3 O 4 Mixing with KH570 as surfactant, stirring, and drying to obtain magnetic microsphere; s3: uniformly mixing base glue, magnetic microspheres and thermal expansion microspheres, wherein the mass of the magnetic microspheres is 3% -5% of that of the base glue, and the mass of the thermal expansion microspheres is 2% -10% of that of the base glue; s4: and coating the product obtained in the step S3 on a base film, and carrying out UV curing to obtain the magneto-caloric anti-sticking adhesive tape. According to the viscosity-reducing adhesive tape, FeC particles can generate certain heat under an alternating magnetic field, and the heat is caused by eddy current loss, magnetic hysteresis, magnetic vector rotation and physical rotation of the FeC particles under the alternating magnetic field, so that an external heating source is not needed, and only the alternating magnetic field is needed to be applied.)

1. The preparation method of the magneto-thermal viscosity-reducing adhesive tape is characterized by comprising the following steps:

s1: preparing a base adhesive, wherein the base adhesive is a UV curing pressure-sensitive adhesive;

s2: mixing nano Fe₃O₄Mixing with KH570 as surfactant, stirring, and drying to obtain magnetic microsphere;

s3: uniformly mixing base glue, magnetic microspheres and thermal expansion microspheres, wherein the mass of the magnetic microspheres is 3% -5% of that of the base glue, and the mass of the thermal expansion microspheres is 2% -10% of that of the base glue;

s4: and coating the product obtained in the step S3 on a base film, and carrying out UV curing to obtain the magneto-caloric anti-sticking adhesive tape.

2. The method for preparing a magneto-caloric anti-sticking tape according to claim 1, wherein: the nano Fe₃O₄The grain diameter is between 20 and 200 nm.

3. The method for producing a magneto-caloric anti-tackiness tape according to claim 1 or 2, characterized in that: the basement membrane is a PET membrane.

4. The method for preparing a magneto-caloric anti-sticking tape according to claim 3, wherein: the PET basement membrane is treated by corona.

5. The method for producing a magneto-caloric anti-tackiness tape according to claim 1 or 2, characterized in that: the grain diameter of the thermal expansion microsphere is 10-60 mu m, and the nano Fe₃O₄The grain diameter is between 20 and 200 nm.

Technical Field

The invention relates to a preparation method of an anti-sticking adhesive tape.

Background

The anti-sticking protective film is divided into a thermal anti-sticking protective film and a UV anti-sticking protective film, and the current anti-sticking protective film is mainly used for the protection of a wafer cutting process and a later picking process, and has a tendency of transferring to the protection of a high-performance toughened glass (such as mobile phone glass) process and the protection of a laser engraving process of a metal rear cover of a mobile phone.

Traditional heat visbreaking membrane adopts the mode of exothermal source to heat, and whole components and parts all can receive the influence during heating, and in addition, exothermal source's rate of heating is slow, and the heating is inhomogeneous, and the energy waste is serious.

Disclosure of Invention

In order to overcome the defects of the existing viscosity-reducing adhesive tape, the invention provides a preparation method of a magnetocaloric viscosity-reducing adhesive tape, which has excellent peel strength before an alternating magnetic field is applied and has obviously reduced peel strength after the alternating magnetic field is applied.

The technical scheme for solving the technical problem is as follows: the preparation method of the magneto-thermal viscosity-reducing adhesive tape comprises the following steps:

s1: preparing a base adhesive, wherein the base adhesive is a UV curing pressure sensitive adhesive which has good heat resistance and aging resistance, and the cohesive force and initial adhesion force and peel strength of the heated UV curing pressure sensitive adhesive can not be obviously changed.

S2: mixing nano Fe₃O₄Mixing with KH570 as surfactant, stirring, and drying to obtain magnetic microsphere. KH570 modified nano Fe₃O₄Particles, the surface of which is coated, thus nano Fe₃O₄The powder is difficult to agglomerate, so that the magnetic microsphere has good dispersibility, lipophilicity and excellent compatibility with the base glue.

S3: the base adhesive, the magnetic microspheres and the thermal expansion microspheres are uniformly mixed, wherein the mass of the magnetic microspheres is 3% -5% of the mass of the base adhesive, the heating effect is not obvious when the mass is less than 3%, the viscosity loss effect is poor, and the adhesive property of the magnetic thermal viscosity reduction adhesive tape is influenced when the mass is more than 5%. The mass of the thermal expansion microspheres is 2-10% of that of the base adhesive, when the mass is less than 2%, the volume change caused by the thermal expansion microspheres is small, the gaps between the adhesive and an adhered object are small, the viscosity loss effect is poor, and when the mass is more than 10%, the adhesive property of the magnetic thermal viscosity reduction adhesive tape is affected.

S4: and coating the product obtained in the step S3 on a base film, and carrying out UV curing to obtain the magneto-caloric anti-sticking adhesive tape.

Preferably, the nano Fe₃O₄The grain diameter is between 20 and 200 nm. Fe with particle size less than 20nm₃O₄The magnetic property can be changed into super-paramagnetic property, the magnetic thermal property is poor, and the heating effect is poor; the particle size of more than 200nm is easy to cause the local temperature rise too fast and easily damage the surface of the colloid or the bonded object.

Preferably, the bottom film is a PET film.

Preferably, the PET bottom film is subjected to corona treatment.

Preferably, the thermally expandable microspheres have a particle size of 10 to 60 μm.

The invention has the beneficial effects that: according to the viscosity-reducing adhesive tape, FeC particles can generate certain heat under an alternating magnetic field, and the heat is caused by eddy current loss, magnetic hysteresis, magnetic vector rotation and physical rotation of the FeC particles under the alternating magnetic field, so that an external heating source is not needed, and only the alternating magnetic field is needed to be applied.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments.