Discussion on the difference between the bottom release paper and release film

Release film

Release film is the silicone release agent coated on the surface of environmentally friendly material PET, PE, OPP film, so that it can show a very light and stable release force for a variety of different organic pressure sensitive adhesives. Different organic pressure sensitive adhesives, such as: hot melt adhesive, acrylic adhesive and rubber system pressure sensitive adhesive, etc., the required release film release force is different, the viscosity of the needle needs to isolate the product adhesive is different, and the release force is adjusted correspondingly, so that it can achieve an extremely light and stable release force when stripping.

PET release film

The classification of release film can be divided into different substrates: PE release film, PET release film, OPP release film, composite release film (that is, the substrate is composed of two or more kinds of materials).

According to the release force can be divided into: light release type release film, medium release type release film, heavy release type release film. According to the color can be divided into: red release film, yellow release film, green release film, blue release film and other colors of PET release film

According to the surface treatment can be divided into: single side release film, double side release film, silicon-free release film, fluorine plastic release film, single side corona, double side corona, frosted release film, matte release film and so on

Single-sided release film: HDPE(low pressure polyethylene) release film; LDPE(high pressure polyethylene) release film for waterproof coils such as sealing tape; Mechanical product packaging, hot melt adhesive packaging, sanitary care products (diapers), anti-corrosion coil and other BOPP(stretched polypropylene) release film; Used for sealing tape, silent tape and other PET(stretched polyester) release film; Double-sided release film such as adhesive protection; Red/Green polyolefin (PE)

Double-sided release film: used for foam tape transparent PET double-sided release film; Double-sided adhesive anti-sun isolation film (HDPE silver coated film); Enhanced aluminized substrate BOPP Enhanced (BOPET) for waterproof coil sun protection and cooling;

Improve the adhesion of the aluminum plating layer, so that the resistance to 100℃ cooking according to the material, use can be divided into: Silicone film/release film - Polyester film (PET) film protective film production of PET release film, polyester film, pre-coated film, light diffusion film, color inkjet film (electronic membrane), printing film for the electronics industry, frosted film, drawing film, white polyester film, black polyester film, PET polyester film PET Mylar.

Release paper, also known as silicone oil paper, anti-stick paper. It is mainly used to isolate objects with stickiness, such as tape. Generally need to be stripped and thrown away when in use; Now widely used, mainly tape or plastic products carrier, of course, in the food, medical and health industry application is not described here in detail.

The classification of release paper can be classified according to plastic release paper and non-plastic release paper; Silicone release paper and non-silicon release paper can also be classified by release agent. There are plastic release paper, because the release agent has a certain permeability, if there is no certain barrier, the release agent will penetrate into the inside of the paper, resulting in poor curing and the release agent use is too large (the cost is too high) and many other adverse factors.

Therefore, it is necessary to do plastic coating treatment on paper (commonly known as coating film), the domestic general use of polyethylene (PE) particles for coating, requiring a melting index of about 7, domestic PE particles generally choose Yanshan petrochemical 1C7A. Divided into single plastic release paper and double plastic release paper; Non-plastic release paper, mainly Grassine, CCK and other special treatment of other release paper.

1. The release paper is produced by coating the release agent on the surface of the base paper after the film is coated.

Because there are paper wool and fibers on the surface of the paper, the coating must be to a certain amount to ensure that there is no penetration point, to ensure that the silicone oil will not penetrate into the paper, to ensure that there will be no poor stripping. Generally, the amount of film coated paper is 16 grams per square meter, and it is said that the Wenzhou area has achieved 11 to 13 grams per square meter, which is quite close to the film data of foreign advanced equipment. In theory, as long as the tape can be removed from the release paper, the lowest amount of film is permissible.

Film release paper is divided into single shower and double shower. General single-side release paper is single shower, of course, there are double shower single-side release paper, because the release surface is generally thicker than 20 grams, and the inseparable surface is generally thinner than 15 grams, so the release paper is relatively flat. If the double-sided coating amount is 22 grams of coated paper, it is more suitable for making double-sided release paper.

Coated release paper is generally used all wood pulp paper, especially in the electronics industry. If straw paper is selected, there will be a lot of paper scraps and easy to break edges when die-cutting. All wood pulp paper is generally called kraft paper, such as natural kraft paper (commonly known as: this cow), white kraft paper (commonly known as: white cow), yellow kraft paper (commonly known as: Japanese yellow cow), blue kraft paper (commonly known as: Indonesian blue cow).

Of course, it is also useful to use all wood pulp double adhesive paper as base paper, more useful photographic paper as base paper, and coated paper and whiteboard paper, cow card, milk card and so on. As long as the paper plastic fastness of the film can meet the requirements, as long as the film has no penetration point, the film is uniform and flat, it should be said that any paper can be made of base paper.