What are the indicators for the eligibility criteria of food packaging bags?

　　Food packaging bags have become one of the indispensable products in the market, mainly because they play an important role in the food industry. It can even be said to be a product that cannot be replaced in a short time. It has become an indispensable product in the food industry. necessity. The quality of a food packaging bag can directly affect the product, and it accompanies the food throughout the process of production and circulation. So how to judge whether the food packaging bag is qualified? Julong Packaging puts forward a few key points for everyone to judge: 　　1. The appearance of qualified food packaging bags is free of defects such as bubbles and perforations. And the width and length deviation are within a certain range, if it exceeds or there is a defect, it is a defective packaging bag. 　　2. In the process of making food packaging bags, the physical and mechanical properties include tensile strength and elongation at break, which reflect the ability of the product to withstand stretching during use. If this item is unqualified, the food packaging bag during use ( Film) is prone to cracking and damage. 　　3. Unqualified food packaging bags can detect heavy metals, residues and other substances that are harmful to human health. At the same time, the residues will also affect the color, aroma, and taste of the food. Such food packaging bags are often very harmful to the human body. It's a big hazard. Qualified food packaging bags are often hygienic to ensure the quality of food. Therefore, the merchants of customized food packaging bags must conduct on-site inspections of the manufacturers in the early stage to ensure their safety and health before placing orders. 　　4. According to the degradation type of the product, the degradation performance can be divided into photodegradable, biodegradable, and environmentally degradable. Degradation performance reflects the ability of the product to be accepted by the environment after use and disposal. If the degradation performance is good, the bag will break, differentiate and degrade by itself under the combined action of light and microorganisms, and become debris, which is accepted by the natural environment; if If the degradability is not good, it will not be accepted by the environment and cause environmental pollution.

2020-11-23

How to choose food packaging bags correctly

　　With the continuous development of various industries, plastic packaging bags are also widely used. At present, there are many types of plastic packaging bags on the market, especially shopping malls are also "gathering places" for plastic packaging bags. Did you choose the right food packaging bags? Now Julong company teaches you how to choose the right plastic packaging bag: 　　1. The thicker the plastic bag, the better? There are strict standards for plastic bags, especially plastic bags used to hold food. You must choose from reliable manufacturers. The quality of such plastic bags will be guaranteed for products that are approved by the relevant departments. Plastic packaging bags for food must be marked with "food". Check the material used to make the plastic bag to see if the plastic is clean. Qualified plastic bags are very tidy and free of residues, while fake and inferior plastic bags will see stains and residues. The thickness of the plastic bag must exceed 0.025 mm. 　　2. The color of plastic packaging products is rich and colorful, and the choice of color packaging is beautiful and generous. Although there are many colors in the plastic bag, we must be careful when choosing it. If it is used in the food category of plastic packaging products, we must choose a simple color from the colorful colors, because it has fewer preservatives. Many dark brown plastic bags are generally made of purchased waste. This raw material cannot directly contact the food. 　　3. Repeated use of plastic bags many times. Many homes often have the habit of storing waste plastic bags. In fact, if you apply it, you can maintain a neat and waste plastic bag. However, waste plastic bags should not be used to touch the food and skin, which will cause diffuse damage to people's physical and mental health.

2020-11-23

What material is good for vacuum packaging bags

　　First, you need to know which material is suitable for your product, and then determine the width, height and thickness of the product. If vacuum packaging is required and the product is not sharp (such as chicken feet, etc.), it is easy to pierce. For food vacuum packaging, I suggest you use a single layer 7-8 line. 　　Then you can calculate the price of the vacuum bag more clearly. 　　Price = one material + second material + third material + consumer ink price + consumer glue price + labor cost + manufacturer's profit + transportation and packaging fee 　　The price of each material = length x width x thickness x specific gravity x unit price of the material 　　Two bags of similar size and thickness usually have different prices. If the materials used are different, if the price of the two bags of pet/pe and pa/pe is larger, the price of the pet is higher than the price of pa. The unit price is much cheaper, if you need aluminum foil vacuum bag, it will be more expensive. 　　The main material of 　　vacuum bag is composite vacuum bag. The main structures are: PET/PE, PET/CPP, PA/PE, PA/CPP, PA/RCPP, PET/PA/RCPP, etc. The structure of the aluminum foil vacuum bag is: PET / AL / CPP, PET / AL / PA / CPP. There is also a co-extrusion vacuum bag, which is formed by co-extruding green materials such as EVOH, PA, PET, PP and PE at one time. 　　Features of vacuum packaging: 　　One. Exclusion of local air (oxygen) in the packaging container can effectively prevent food from decay. Can effectively prevent the exchange of substances in the package; 　　Use packaging materials with excellent barrier properties (air tightness) and strict sealing technology and requirements. It can prevent food from losing weight and taste, and can prevent secondary pollution. Accelerate heat conduction; 　　It has good antistatic, oxygen barrier, shielding, moisture-proof, shading function and excellent heat-seal performance; 　　saves space, because it is vacuum compressed, the original air is removed from the air, and the volume becomes smaller. 　

2020-11-23

Food packaging requirements for packaging bags

　　 　　From the perspective of packaging performance, food packaging bag requirements can be divided into two parts: internal and external: 　　1. Intrinsic requirements: Intrinsic requirements for food packaging refer to the technical requirements for ensuring the quality and quantity of food in its packaging through packaging. 　　Strength requirements: the packaging can protect the packaged food against various destructive forces, such as pressure, impact and vibration, during storage, stacking, transportation, and handling. There are many factors related to the strength of food packaging, mainly including transportation methods (such as automobiles, airplanes), stacking forms (such as multi-layer stacking, cross stacking) and environment (such as climate, sanitary environment) and other three types of factors. 　　Barrier property requirements: Barrier property is one of the important properties in food packaging. Many foods are stored and packaged. Due to poor barrier properties, the flavor and quality of the food change, which affects the quality of the food. The barrier requirements are determined by the characteristics of the food itself, and its characteristics include external barriers, internal barriers or selective barriers, and so on. The barrier substances are air, water, grease, light, microorganisms and so on. 　　Breathing requirements: Some exported foods, such as fresh fruits and vegetables, still maintain breathing function during packaging and storage. Therefore, such packaging materials or containers have breathability or can control breathing to achieve the purpose of preservation. 　　Nutrition requirements: Food will gradually lose nutrition during packaging and storage. Therefore, food packaging should be conducive to the preservation of food nutrition, and more ideally, nutrition can be locked through packaging. Other requirements: There are many inherent requirements for food packaging, such as heat resistance requirements, light resistance requirements, shatter resistance requirements, and moisture retention requirements. 　　2. External requirements: The external requirements of food packaging are the use of packaging to reflect the characteristics, performance, and image of the food. It is the external visualization and expression of the food and its means. 　　Safety requirements: The safety of food packaging includes aspects such as hygiene and safety, safe handling and safe use. Hygiene and safety means that food packaging materials should not contain substances harmful to the human body; in terms of packaging technology, the nutritional content, color and taste of the processed food should be kept as unchanged as possible. Handling safety means that the packaging can ensure the safety during transportation and loading and unloading, and it should also include the safety of the consumer when shopping and carrying it after purchase. Safety in use is to ensure that consumers will not be harmed during the opening and eating process. 　　Promotional requirements: Food packaging is one of the means of food promotion. The performance, characteristics, eating method, nutritional content, and cultural connotation of food can be promoted on the packaging. The promotion of food packaging includes: necessary information promotion, image promotion, color promotion, structure promotion, etc. 　　The external requirements of food packaging bags also include: convenience requirements, prompt requirements, interesting description requirements and emotional description requirements, etc.

2020-11-23

What material is good for vacuum packaging bags

　　First, you need to know which material is suitable for your product, and then determine the width, height and thickness of the product. If vacuum packaging is required and the product is not sharp (such as chicken feet, etc.), it is easy to pierce. For food vacuum packaging, I suggest you use a single layer 7-8 line. 　　Then you can calculate the price of the vacuum bag more clearly. 　　Price = one material + second material + third material + consumer ink price + consumer glue price + labor cost + manufacturer's profit + transportation and packaging fee 　　The price of each material = length x width x thickness x specific gravity x unit price of the material 　　Two bags of similar size and thickness usually have different prices. If the materials used are different, if the price of the two bags of pet/pe and pa/pe is larger, the price of the pet is higher than the price of pa. The unit price is much cheaper, if you need aluminum foil vacuum bag, it will be more expensive. 　　The main material of 　　vacuum bag is composite vacuum bag. The main structures are: PET/PE, PET/CPP, PA/PE, PA/CPP, PA/RCPP, PET/PA/RCPP, etc. The structure of the aluminum foil vacuum bag is: PET / AL / CPP, PET / AL / PA / CPP. There is also a co-extrusion vacuum bag, which is formed by co-extruding green materials such as EVOH, PA, PET, PP and PE at one time. 　　Features of vacuum packaging: 　　One. Exclusion of local air (oxygen) in the packaging container can effectively prevent food from decay. Can effectively prevent the exchange of substances in the package; 　　Use packaging materials with excellent barrier properties (air tightness) and strict sealing technology and requirements. It can prevent food from losing weight and taste, and can prevent secondary pollution. Accelerate heat conduction; 　　It has good antistatic, oxygen barrier, shielding, moisture-proof, shading function and excellent heat-seal performance; 　　saves space, because it is vacuum compressed, the original air is removed from the air, and the volume becomes smaller.

2020-12-18