It is necessary to develop pressure sensitive adhesive for wide temperature range

With the development of the economy and information technology, online shopping has become a way of life. Most of the goods we receive are packed in paper express boxes. As the number of online shoppers grows, so does the use of paper packaging boxes for express delivery. The traditional carton packaging is based on the layer winding of BOPP single-sided tape. The tape usage of a single carton is large.

Because BOPP film is difficult to degrade in the environment, the burden on the environment is greater. In recent years, the carton cover is pre-fitted with double-sided cotton paper tape.

When users use it, they only need to open the release paper and press it together by hand to complete the solid packaging of the carton, which effectively avoids the large use of BOPP sealing tape. The existing carton with double-sided tape in the winter in the north, most of the tape at low-temperature conditions pressure sensitivity is poor, can not be effectively bonded, individual at low-temperature conditions can effectively bond, but the carton is easy to tear traceless, and can not play the role of anti-theft. In the process of transportation, when encountering a high-temperature environment, it is easy to pop open, resulting in the failure of the sealing box, which brings great loss to users.

To achieve the purpose of the good bonding effect that is not easy to bounce off now offers the following technical scheme: a wide WenYu using pressure sensitive adhesive, including the following materials: 100 copies, acrylic polymers solution viscosity resin 10 -15, 25, 1 -polybutylene crosslinking agent 1 -3 copies. Step 1 Prepare acrylic polymer solution: In a blender, thermometer, nitrogen import, reflux condenser tube, and dropping funnel of the investment in the reaction vessel as the monomer composition-BA and 2 EHA, AA, 2-HEA, as a polymerization solvent of ethyl acetate, the import of nitrogen stirring for 1 hour at the same time, in such a way to remove oxygen inside the polymerization system, and then add AIBN as a polymerization initiator.

The solution of acrylic polymer was obtained by heating polymerization.

Step two, make the pressure-sensitive adhesive solution before coating: in the acrylic polymer solution prepared in step one, viscosifying resin, polymethyl butene, and necessary diluent, and then add isocyanate crosslinking agent and stir mixing, so as to make the pressure-sensitive adhesive solution to be coated;

Step 3: Make double-sided tape: the pressure-sensitive adhesive is coated on the release paper, dried to form a pressure-sensitive adhesive layer, and then transferred to the cotton paper substrate. In addition, the same pressure-sensitive adhesive layer formed by drying is transferred to the other side of the cotton paper substrate, and cooked at 40 ℃ for 3 days in the drying room to obtain the double-sided tape;

Step 4: Performance test: Cut the double-sided tape into splines 15mm wide and 300mm long for use, and then paste the prepared tape on the cartons in different temperature environments. After a certain period of time, check the ripping state of the tape.