What are the functional characteristics and usage classification of CPP protective film?

CPP protective film belongs to cast polypropylene protective film, which is a kind of non-stretched, non-oriented polypropylene protective film. Generally, it can be divided into homopolymer CPP and copolymer CPP according to the raw materials, and can be divided into ordinary CPP, aluminized CPP (wmcpp) and cooking CPP (rcpp) according to functions and uses. The main functional characteristics of CPP protective film are high transparency, good flatness, good heat resistance and easy deformation. Let us introduce it in detail!

1. The functions of CPP protective film are as follows

(1) Excellent moisture resistance, with certain oxygen and oil resistance.

(2) Non-toxic, tasteless, tasteless and hygienic, with a density of 0.92g/cm3.

(3) High transparency and good flatness.

(4) It has good temperature resistance, is not easy to deform, has a certain degree of rigidity and flexibility, and has a softening point of about 140 degrees.

(5) Good hand feeling, shading, heat-sealability, not easy to prevent sticking.

2. Classification of CPP protective film:

1. According to the glue system, it can be divided into:

(1) Polyurethane (PU) adhesive system: good exhaust, good cohesion, no die-cutting powder, good aging resistance, environmental protection, good temperature resistance, no residual rubber

(2) Acrylic: good viscosity, not easy to leave glue, poor air exhaust, easy to drop powder during die cutting.

(3) Silicone: high temperature resistance, good adhesion, but not environmentally friendly.

2. According to the purpose, it can be divided into three types:

Digital product protective film, car protective film, household protective film, food preservation protective film, etc. With the popularization of mobile phones and other digital products in China, protective films have gradually become the general term for screen protective films, and their functions are also different in the field of screen protective films.

3. According to the type of material, it can be divided into:

PP, PVC, PET, AR, PE, OPP, OCA, etc.

4. Classified by market:

(1) Protective film for high-tech electronics industry: such as dry film or wafer grinding process. This kind of protective film usually needs to be produced in a clean room and has very strict requirements on crystal points. Only a few manufacturers have sufficient technical capabilities to meet these requirements.

(2) Traditional protective film: such as galvanized steel protective film, color steel plate protective film, glass or plastic sheet protective film, etc. Most of these traditional protective films are low value-added applications with low performance and crystallinity requirements, and most of them are gelatinized protective films.

(3) Display touch screen protective film: The application range includes flat panel displays, TFT-LCD modules, backlight modules, glass substrates and various optical components, such as polarizers, color filters, etc. Viscosity and crystallization point control, which is a high value-added and high-tech application.

The above is about the functional characteristics and application classification of CPP protective film. In addition, because the CPP protective film has high temperature resistance that the PE base film does not have, it is particularly suitable for electronic manufacturing processes such as imimml. CPP protective film is mainly suitable for photoelectric film, diffuser, light guide plate, film, prism, especially suitable for the coating of ITO conductive protective film, IMD, IML and other electronic manufacturing processes.