Is cooking grade RCPP more resistant to high temperatures than homopolymer?

Cooking grade RCPP is more resistant to high temperatures than homopolymer

As we all know, the high temperature cooking bag can withstand the temperature of 121-135 degrees, the more commonly used materials are generally Ninon NY composite cooking grade CPP, that is, RCPP, and Ninon NY composite pure aluminum AL composite cooking grade CPP, that is, RCPP. RCPP is a cooking CPP film, which is better than ordinary CPP film heat resistance, can withstand 121 degrees and higher temperatures. For some bags that require temperature sterilization above 121 degrees, RCPP can be used.

In the plastic family, there is a member called RCPP, so what is RCPP? RCPP film refers to the unstretched polypropylene film made by the flow-yanking method. The product has the characteristics of light weight, high transparency, strong mechanical adaptability, good moisture resistance and heat resistance. It can be dry combined with PET, NY, aluminum foil, etc., and high temperature cooking sterilization of composite substrate films, such films mainly use copolymer polypropylene raw materials.

When it is used for high temperature cooking (resistance to cooking sterilization above 120℃), it is made of block copolymer polypropylene, and when it is used for general cooking (resistance below 100 ~ 120℃), it is made of non-copolymer polypropylene. The copolymer used in the production of cooking grade CPP film is modified by copolymerization, so that the impact strength of cooking grade is significantly higher than that of non-cooking grade, therefore, the safety performance of liquid and hard material packaging is better, and it is suitable for storage in the refrigerator.

Temperature is the primary parameter in the casting process of cooking grade CPP film, and whether the temperature selection and control are appropriate directly affects the physical, mechanical and chemical properties of the film. In general, the extrusion temperature of copolymerized polypropylene is generally below 240 ° C, and the processing temperature should be strictly controlled in actual production according to the characteristics of raw material properties. Because the cooking grade CPP film is used for cooking food packaging, the safety performance is better, and it is suitable for storage in the refrigerator.

Based on the above characteristics, the film is mainly used as a substrate in composite packaging materials, composite with other films. Because of its good heat resistance, it is often used in the packaging of cooking food, and can be divided into two kinds of high temperature cooking grade and general cooking grade. High temperature cooking grade CPP film, mainly used for dry composite with other films to produce a variety of packaging bags, can be cooked above 120℃ sterilization; General steamed CPP film, can only be boiled below 120℃ sterilization.

Related knowledge development:

What is RCPP High Temperature Cooking Film?

PP refers to plastic polypropylene, where C refers to the processing process, which is the polypropylene (PP) film produced by the casting extrusion process. The high-temperature cooking CPP film is also known as RCPP film. This kind of film has light weight, high transparency, strong mechanical adaptability, moisture resistance, good heat resistance and other properties, the biggest feature is high temperature resistance, can be cooked in a high temperature environment of 120 degrees Celsius, higher safety performance.

RCPP high temperature cooking finished bag

RCPP high temperature cooking film combined with aluminum foil composite bag can achieve the best high temperature resistance.

Aluminum foil has good sealing property and strong barrier property. Aluminum foil has fewer pinholes.

Choose aluminum foil material to ensure food hygiene and safety level, its appearance cleanliness must be high, no oil stains and floating dust, the appearance of support to be high. A simple method is to check with purified water, purified water should flow on the surface of the aluminum foil. The oil stain on the surface of aluminum foil is not optimistic, which will harm the composite color fastness of aluminum foil and other raw materials, especially after the packaging bag is cooked at high temperature, the phenomenon of delamination will occur.