How to distinguish between BOPP and OPP in the new preface of anti scratch film manufacturers.
The difference between BOPP (biaxial stretching) and OPP (unidirectional stretching) lies in the longitudinal and transverse stretching, which are related to the molecular structure. Polymers generally do not exhibit anisotropy, so there is no difference in the use of materials. There are some differences between unidirectional and biaxial stretching. During the unidirectional stretching process, the injected thin film material is formed and enters a stretching unit composed of multiple rollers through a nozzle, with different roller speeds. Therefore, as the length changes, the thickness of the film also changes accordingly. Unidirectional stretching can improve the tear resistance of the film, so the braided wires of ropes, packaging tapes, or bags are all produced through this process.
The thickness of thin film production ranges from 25 to 800 μ Between m. During the biaxial stretching process, the pre stretched film can be stretched in an orthogonal direction of the same length as the extrusion direction. With the development of linear motors, the above stretching process can be flexibly connected, and efficient forming of longitudinal and transverse biaxial stretching, also known as synchronous stretching, does not require complex transmission and chain structure. The manufacturer of this synchronous stretching equipment believes that the higher the uniformity of polymer stress, the higher the elastic coefficient, tear resistance, and tensile strength of the product.
BOPP film pre coated tactile film can be produced using either the tube film method or the flat film method. The performance of BOPP film varies depending on the processing method. Due to the high tensile ratio (up to 8-10), the strength of BOPP film produced by the flat film method is higher than that of the tube film method, and its thickness uniformity is also good.
Manufacturer of anti scratch film.
BOPP tactile film (SoftTouchFilm) is a special BOPP matte film with a smooth and delicate velvet texture on the surface.
BOPP film is colorless, odorless, tasteless, non-toxic, and has high tensile strength, impact strength, rigidity, toughness, and transparency. BOPP film is a very important soft packaging material with a wide range of applications. BOPP film is also insufficient. For example, static electricity is prone to accumulation and lacks heat sealing properties.
BOPP film pre coated tactile film is a very important soft packaging material that is widely used. BOPP film is colorless, odorless, tasteless, non-toxic, and has high tensile strength, impact strength, rigidity, toughness, and good transparency. The surface of BOPP film can be low, and corona discharge is required before gluing or printing. But after corona treatment, BOPP film has good printing adaptability, can be printed with color matching, and has a good appearance effect, so it is commonly used as a surface material for composite films.
BOPP film also has shortcomings, such as easy accumulation of static electricity and no heat sealing. BOPP film is prone to generating static electricity, and static electricity removers need to be installed on high-speed production lines.
To obtain a heat-sealable BOPP film, a heat-sealable resin adhesive solution such as PVDC adhesive, EVA adhesive, etc. can be applied to the surface of the BOPP film after corona treatment. Solvent adhesive can also be applied, and a heat-sealable BOPP film can be produced by extrusion or co extrusion composite method. This type of film is widely used for packaging of bread, clothing, footwear, and other products, as well as for packaging the covers of tobacco and books. The strength of the BOPP film that causes tearing increases after stretching, but the secondary tearing strength is lower. Therefore, there should be no notches left at both ends of the BOPP film, otherwise the BOPP film is prone to tearing during printing and lamination.
After applying adhesive, box sealing tape can be produced, which is a market with a large amount of BOPP. The performance of BOPPBOPPOPP thin films produced by either the tube film method or the flat film method varies depending on the processing method. Due to the high tensile ratio (up to 8-10), the strength of BOPP film produced by the flat film method is higher than that of the tube film method, and the film thickness is uniform. To improve comprehensive performance, multi-layer composite production is usually used during use.
BOPP can be compounded with various materials to meet special application needs. For example, BOPP film can be composite with LDPE (CPP), PE, PT, PO, PVA, etc., with high air blocking, moisture blocking, transparency, high, low temperature, steam and oil blocking properties. Different composite films can be applied to packaging of oily food, delicious food, dry food, soaked food, various steamed and cooked food, monosodium glutamate, pancakes, rice cakes, etc.
Zhejiang Kangfa Film Technology Co., Ltd. is a new type of enterprise with a certain scale. Founded in 2005, the company is engaged in the research and development, production, and sales of various special pre coated films, and can independently develop new products. Its production process is specialized, and the product quality is excellent.
Our main products include anti scratch and matte film, golden onion film, matte film, tactile film, golden sand film, flash film, skin feeling film, and wire drawing film.
Contact information:
Zhejiang Kangfa Film Technology Co., Ltd
Address: Building 52, Zone E, Longgang New City Entrepreneurship Park, Longgang City, Wenzhou, Zhejiang Province
Helpline: 18857792955
Contact person: Ni