Wuhan Handern Dry Food Packaging www.handern.com
DATE：2020/7/24 8:49:07 / READ： / SOURCE：This station
Wuhan Handern Dry Food Packaging www.handern.com
For dry food packaging, there are the following packaging features and requirements: First, these foods are usually packaged in a single-layer plastic film or a cardboard box with plastic as the inner bag. Second, most of them do not need high oxygen barrier properties, but All dry foods need good moisture resistance and excellent aroma retention, and good resistance to the intrusion of external odors into the food; third, simple packaging structure and low cost; fourth, except for soup powder mixtures, these foods are sold in large bags For this, a re-opening device is required, but the cost will be very expensive, and the design should be determined after weighing the two. Dry food includes: dry grains, baked mixture, rice, dry soup powder mixture, noodles, etc. The moisture loss and gain in dry food packaging should have an appropriate degree, otherwise it will affect the quality of dry food. Generally, the humidity is required to be (0.07×10～0.31×10-)gcm2·d, the O2 permeability of the packaging material is (1.5×104-1.5×1074)mL/(cm2d). www.handern.com Meltblown non-woven equipment
Although the packaging materials are changing year by year, especially the lining, and the packaging machinery is constantly modernizing, the changes in grain packaging are very small. The cardboard boxes from 1910 are still in use, and the village bags in the cardboard boxes have been coated with wax paper, cellophane and Different changes of NC-coated cellophane, automatic packaging molding and filling equipment require the village to have good mechanical adaptability, pinhole resistance, sealing without folding, and moisture resistance. Using PVA saturated paper or PVDC-coated paper instead of NC-coated cellophane can have lower cost, moisture resistance, O2 resistance, and fragrance retention. The use of 50.8um thick HDPE/EVA co-extruded composite film for material search costs is lower, among which the thickness of HDPE is 80% of the total thickness. In order to reduce costs and improve heat sealing performance, use EVA/ionic resin mixture to ensure heat sealing reliability. The moisture permeability of this structure is 0.3g/645cm2·24h. When oxygen barrier properties are important (for example, oily noodles), EVOH or Ny can be used for co-extrusion. For the convenience of use, the grain packaging village bag is equipped with an easy-opening and easy-closing system, such as a "zip lock" system on the inner sealing layer. www.handern.com Meltblown non-woven equipment
1. Baking mixture (such as: cake) www.handern.com melt blown non-woven equipment
Baking mixture is a new term that appeared in the middle of the 20th century. Before the 1930s, baked goods were produced at home. Later, it was invented to mix all the raw materials for making baked goods, such as flour, sugar, fatty lungs, spices, etc., packaging In a suitable packaging bag, it is directly used by the user. Generally, it is packaged in LDPE film bags in a carton, and the printed paper can also be extruded and coated with EVA to make inner bags. LDPE bags are packaged on a forming-filling-heat-sealing machine, and the nylon/LDPE co-extruded film has good deodorization. www.handern.com Meltblown non-woven equipment
2. Rice
Rice packaging generally uses sack flexible packaging, but because it is easily damaged, plastic bags are used instead. The prices are cheaper than paper packaging. At present, more than half of the rice in the United States is packaged in plastic bags, and the plastic film used must have enough plastic film to be attached. The strength of 9kg weight, because the product occasionally has sharp corners, for this reason, the needling property is also important. It is heat-sealed into a bag and sealed, so it must be reliable and strong. Both LDPE and LLDPE can meet the requirements, and both can also be used. LDPE has better compulsory blends. A typical bag consists of a two-layer composite, the outer layer is reverse printed, and the inner layer is heat-sealed. For special types of rice with high oil content, such as: rice, Good oxygen barrier to extend its pot life. For foods like dried soybeans and dried peanuts, packaging materials with high oxygen barrier properties are also required. There are roughly four types of structures to choose from: the first structure is a PET material compounded with an EVA heat-sealing layer, and the bag mouth is equipped with a reclosable "Zip-Pak" structure; the second structure is aromatic rice: the United States Texas uses vacuum brick packaging. Like coffee packaging, vacuum packaging with 114=mPET/nylon/LDPE structure is used. Nylon and PET have good aroma retention, gas barrier properties, and pinhole resistance, while LDPE Is the heat seal layer. The specifications are 0.4, 0.8 and 1.2kg. Bundling LLDPE bags with PVC tear tape is also a commonly used packaging type; the third structure is a blow-molded PET barrel with a size of 250mL～4L, which is a packaging type for high-priced rice. The fourth structure is that the rice with special fragrance is packaged in a flexible way, which can prevent the rice from sticking to the bottom of the plate during cooking. The perforated bag can let in hot steam during cooking, but can prevent it from going out at the same time. The packaging bag that can be directly cooked into rice can be made of PE blend, PP or nylon. Multiple perforated bags are packed together and packed in a carton. www.handern.com Meltblown non-woven equipment
Author：admin