CPP film is a film material made from polypropylene resin as the main raw material, which is bi-directionally stretched through extrusion molding. This bi-directional stretching treatment makes CPP films have excellent physical properties and processing performance.
CPP films are widely used in the packaging industry, mainly for food packaging, pharmaceutical packaging, cosmetic packaging, and other fields. Due to its excellent transparency and gloss, it is also commonly used in the printing industry to produce beautiful bags, labels, and so on.
Advantages of CPP film:
Glossiness and transparency: CPP film has a smooth surface and good transparency, which can effectively show the appearance of the products in the package.
Mechanical properties: CPP film has high tensile strength and tear resistance, not easy to rupture, to protect the packaging items.
High and low-temperature resistance: CPP film can maintain stable performance in a wide range of temperatures, suitable for packaging needs under various environmental conditions.
Printing performance: CPP film has a flat surface and is suitable for a variety of printing processes, with clear printing effects and bright colors.
Easy processing: CPP film is easy to cut, heat-seal, laminate, and other processing, suitable for a variety of packaging forms.
Disadvantages of CPP film:
Less flexible: Compared to other plastic films, CPP films are slightly less flexible and may not be suitable for certain packaging applications that require a higher degree of flexibility.
Weak abrasion resistance: CPP film is susceptible to friction and abrasion during prolonged use, affecting appearance and performance.
Static electricity problem: The CPP film surface is prone to static electricity, so we need to take anti-static measures to avoid affecting the product packaging and use.
Problems easily encountered in the processing of CPP film:
Raw edges: Raw edges may occur during the cutting and processing of CPP films, affecting product quality. Need to use the right tool and process to solve.
Static electricity: CPP film is prone to static electricity, affecting productivity and product quality. Antistatic agents can be added or static elimination treatment to solve the problem.
Crystal point: CPP film in the production process is prone to crystal point, affecting the appearance and performance. It needs to be solved by reasonable control of processing temperature, cooling speed and adjustment of processing aids.
Processing aids commonly used in the processing of CPP film are mainly antistatic agents: used to reduce the generation of static electricity in CPP film and improve the surface properties of the product. Smooth agent: can increase the lubricity of CPP film, reduce the coefficient of friction, and improve processing performance.
At present, the most commonly used film sliding agent is amide, but due to the small molecular weight of amide sliding agent is easy to precipitate, thus forming crystal spots on the film surface or white powder, so find a film sliding agent that does not precipitate is also a big challenge for film manufacturers.
Traditional film talcum agents due to their composition, structural characteristics, and small molecular weight lead to very easy precipitation or powder, greatly reducing the effect of the talcum agent, the coefficient of friction will be unstable due to different temperatures, the need to clean the screw regularly, and may cause damage to the equipment and products.
Adjustment is an opportunity, SILIKE brings new opportunities to the film industry.
In order to solve this problem, SILIKE’s R&D team, after repeated tests and improvements, has successfully developed a film slip agent with non-precipitating characteristics, which effectively solves the defects of traditional slip agents and brings great innovation to the industry.
The stability and high efficiency of SILIKE series non-precipitating slip agent has made it used in many fields, such as plastic film production, food packaging materials, pharmaceutical packaging materials manufacturing, etc. And we also provide customers with more reliable and safer product solutions.
SILIKE SILIMER series non-separating film slip agent has the outstanding features of high-temperature slip, low haze, non-separating and non-dusting, non-affecting heat sealing, non-affecting printing, odorless and stable coefficient of friction in plastic film processing. It has a wide range of applications and can be used in the production of BOPP/CPP/PE/TPU/EVA films, etc. It is suitable for casting, blow molding, and stretching processes.
With SILIKE SILIMER series non-precipitating slip agent , you can achieve superior plastic film quality with reduced defects and enhanced performance.
Ready to elevate your CPP film quality and market competitiveness? Contact SILIKE today for the perfect solution tailored to your needs!
Reach out to us at Tel: +86-28-83625089 or +86-15108280799, or via email: amy.wang@silike.cn. Let’s transform your plastic film production process together!
article source: https://www.siliketech.com/news/how-to-improve-the-production-defects-of-cpp-film-solutions-for-surface-crystal-spots/
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