How can I choose qualified food packaging bags?

Plastic products are loved by consumers for their light weight, durability, and impact resistance. However, the market is full of food packaging bags with varying qualities. How can food manufacturers choose reliable food packaging bags? Below, Shunxingyuan Packaging, a professional flexible packaging manufacturer, will give you a detailed explanation.

1. Check the Appearance

If the product appearance is rough, has molding defects, incorrect color, impurities, or poor printing quality, it is best not to use it. Products with substandard appearance quality will affect the consumer's visual experience. Appearance is a reflection of the intrinsic quality; products with substandard appearance often have poor intrinsic quality, affecting their use. Substandard printing quality affects aesthetics and may even cause discoloration and food contamination.

2. Smell the Odor

The main reason for the odor in plastic products is the use of recycled waste and inferior auxiliaries. The pungent odor emitted from products with odor will not only harm the human respiratory system but also contaminate food.

3. Touch

Some food packaging bags use very bright colors to attract consumers' attention. However, the pigments in low-quality dark-colored products often fall off during use. Food packaging bags are mostly made of polyethylene film ( PE film) This film is non-toxic and can be used to hold food. Another type of film is made of polyvinyl chloride ( PVC) Polyvinyl chloride ( PVC) itself is also non-toxic, but the additives added according to the use of the film are often harmful substances to the human body and have a certain toxicity. Therefore, this type of film and packaging bags made from this film should not be used to hold food.

To distinguish polyvinyl chloride ( PVC) packaging bags and polyethylene ( PE) packaging bags, a very simple method can be used for identification: check whether the selected packaging bag will fade.

In recent years, some special and novel packaging materials have emerged in food packaging materials. These materials are more intelligent and can reflect more value in food packaging. However, due to various reasons, it is still difficult to quickly popularize the use of these materials. However, enterprises that need packaging bags should still understand them.

1. Wood Plastic

Japanese scientists have developed a wood-plastic packaging material from pine wood. Polyurethane is produced by extracting polyol from wood powder and then reacting it with isocyanate. This wood plastic has extremely strong heat resistance and is biodegradable. It can be used to make temperature-resistant packaging bags, etc.

2. Corn Plastic

American researchers have developed a readily degradable corn plastic packaging material. It is made by mixing corn starch into polyethylene. This plastic is suitable for making integrated food packaging bags. This packaging can quickly dissolve in water, avoiding contact with pollution sources and bacteria and viruses.

3. Rapeseed Plastic

A rapeseed plastic packaging material has been successfully developed in the UK. Three genes that produce plastic were extracted from bacteria that produce biopolymers and transferred to rapeseed plants. After a period of time, a plastic polymer liquid is produced, which can be refined and processed to obtain rapeseed plastic. Packaging materials or food fast-food packaging materials made from this plastic can decompose on their own after being discarded, leaving no polluting residues.

4. Wheat Plastic

This is made by mixing wheat flour with glycerin, glycol, polysilicone oil, etc., drying it, and then adding 150kz/Id pressure to form a translucent, plastic film. The advantage of using wheat plastic to package food is that it can be decomposed by microorganisms.

5. Soybean Plastic

The United States uses soybean-extracted protein to produce food packaging materials similar to plastics, which can replace plastics synthesized from petroleum. This production technology involves soaking and grinding soybeans to separate the protein, then drying the protein solution to remove water, and then mixing this protein powder with other components and additives to produce edible films or coatings for food packaging. They have good strength, elasticity, and moisture resistance.

6. Chlorophyll Plastic

German scientists have invented a plastic film that has been “dyed” with chlorophyll. Most green fruits and vegetables contain a large amount of chlorophyll, and this pigment undergoes a photosensitive oxidation reaction under light irradiation, decomposing the energy in the food, thus causing the food to rot. By using a special method to “dye” the plastic film with chlorophyll, the film treated in this way can effectively “intercept” the light that causes food spoilage when used to package food, thus greatly extending the shelf life of the food.

7. Bacterial Plastic

British researchers have developed a PHB bacterial plastic. It is first made by culturing a bacterium with sugar and then processed into a material similar to polypropylene. This material is non-toxic and easily biodegradable, making it an ideal material for making food packaging bags, and it does not pollute the environment after being discarded.

8. Bacteria Detection Film

This is a special film that can detect bacteria. A special coating is applied to the surface of a common food packaging film, giving it the special function of detecting bacteria. For example, the bacteria detection film used for raw and cooked meat packaging will change the originally transparent and colorless packaging film to a warning color if the packaged meat is no longer fresh and the harmful bacteria content exceeds the food hygiene standard, allowing consumers to know that the meat is no longer edible.

Long press the QR code to follow and customize your exclusive packaging

www.dgsunpak.cn  Food Packaging Bags