Improved glue and PET base material co-granulation type protective film and manufacturing method thereof

Abstract

The invention discloses an improved glue and PET base material co-granulation type protective film and a manufacturing method thereof. The protective film comprises a PET base material, the surface ofthe PET base material subjected to corona treatment is coated with a moderately cross-linked improved saturated polyester pressure-sensitive adhesive coating subjected to solubilization and graft modification treatment, a release film can be attached to the moderately cross-linked improved saturated polyester pressure-sensitive adhesive coating subjected to solubilization and graft modification treatment, and the improved saturated polyester pressure-sensitive adhesive subjected to solubilization and graft modification treatment in the moderately cross-linked improved saturated polyester pressure-sensitive adhesive coating subjected to solubilization and graft modification treatment comprises graft-modified saturated polyester macromolecules, polycaprolactone and polyacrylate components.The prepared pressure-sensitive adhesive is excellent in adhesive property and good in edge bearing property compared with a traditional protective film preparation process, and after the pressure-sensitive adhesive is used, the waste protective film can be directly extruded and granulated to obtain reusable novel plastic particles, so subsequent reutilization is convenient.

Description

technical field [0001] The invention relates to the field of pressure-sensitive adhesive products, in particular to an improved adhesive and PET base material co-granulation protective film and a manufacturing method thereof. Background technique [0002] Pressure-sensitive adhesive products can exhibit viscosity without heating or using solvents, and are widely used in die-cutting, electronics, medicine, optics, electroplating protection, and material processing. [0003] At present, the protective film / adhesive tape is prepared by coating a pressure-sensitive adhesive on a substrate with a certain surface free energy, drying, cross-linking and curing, and then performing an anti-adhesive treatment on the adhesive layer. The pressure-sensitive adhesive layer used in the protective film / adhesive tape is generally composed of PSA such as poly(meth)acrylate, rubber, polyurethane or silicone. These pressure-sensitive adhesive layers are usually insoluble and insoluble. The mel...

AI Technical Summary

Problems solved by technology

[0009] 2. As solid hazardous waste, it should be handled by a qualified professional institution: the cost of this kind of treatment is high, and the price of treatment fee per ton ranges from 4,000 yuan to 5,000 yuan, and the storage and transportation conditions are harsh, which is difficult for ordinary enterprises to bear;

The disadvantages of this treatment method are: due to the use of organic solvents, there are hidden fire safety and occupational health safety hazards; the high price of organic solvents leads to unreasonable economics, and the organic solvents after use also have problems to be treated

However, in view of the huge differences between PET and various pressure-sensitive adhesives in chemical composition, molecular structure, molecular weight, modulus, melt index, surface free energy, and solubility parameters, various protective materials based on PET It is difficult to recycle the film / adhesive tape through co-extrusion granulation, so how to solve the compatibility of PET and the pressure-sensitive adhesive coating coated on it during extrusion granulation It is the key to solve the production and research and development of PET substrate co-granulation protective film

[0015] The use of polyester pressure-sensitive polymer materials can effectively solve the problem of polymer compatibility between the adhesive coating and the PET substrate in the co-extrusion granulation process, but there are few types of polyester pressure-sensitive polymer materials. The glass transition temperature (Tg) is high, and it is difficult to meet the requirements of conventional protective films / adhesive tapes, such as the ETERKYD5016-TS-52 thermoplastic saturated copolymer high molecular weight polymer produced by ETERNAL MATERIALS Co., LTD. Ester resin, its Tg is at 17°C. The initial adhesion of the protective film made of this polyester polymer is very small, and it is basically difficult to meet the viscosity requirements of the protective film / adhesive tape. Generally, it is used for laminating glue or metal baking paint coating use

[0016] Although the disadvantages of high glass transition point of polyester pressure-sensitive polymer materials can be partially solved by grafting monomers with low glass transition point, the grafting efficiency of polymer materials is generally very low, low When the amount of Tg monomer used is large, the stability problem caused by the phase separation of the adhesive itself is very likely to occur, thus limiting the use of grafted modified polyester pressure-sensitive adhesives

Images