Explanation of heat seal aluminum foil bag compressive strength
Aluminum foil bag with plastic particles refers to the package made of plastic particles. Common plastic particles include general plastic, engineering plastic and special plastic. Performance is good, opaque, silver white, anti gloss, with good barrier, heat sealing, shading, high and low temperature resistance, oil resistance, fragrance retention, softness and other characteristics.
Plastic particle aluminum foil bag is widely used in various industries. Food packaging: rice, meat products, dried fish, aquatic products, bacon, roast duck, roast chicken, roast pig, frozen food, ham, cured meat products, sausage, cooked meat products, sauce, bean paste, seasoning, etc. can well preserve the color, flavor and texture of food. Metal Electronics: suitable for packaging circuit boards, electronic products, mechanical parts, consumer goods, industrial products, etc. Pharmaceutical packaging: plastic particle aluminum foil bag is suitable for large machinery and equipment, chemical raw materials, medicine and other packaging.
Analysis of the reason of the poor compressive strength of the aluminum foil bag
1. Influence of heat sealing raw materials
The types of heat sealing raw materials are different, and the heat sealing compressive strength is different. The manufacturers use different raw materials, such as PP, PE / EVA, etc., and the heat sealing compressive strength of these materials is not consistent. The products with the same plastic film and different aggregation methods have different heat seal compressive strength; The thickness and symmetry of raw materials will also harm the heat seal compressive strength; Different production methods of heat permeable layer, such as injection molding, tape casting film, etc., are harmful to heat seal compressive strength. The storage time of plastic film is too long, the precipitation increases, and the compressive strength of heat seal is poor after flame treatment; The hygroscopic raw materials are affected by moisture, and the thermal surface figure is delaminated, and the tensile strength is reduced.
2. The influence of the manufacturing process of the composite bag
The printing ink used by the manufacturer has poor heat resistance or inappropriate preservatives in the printing ink. Under the high temperature of bag making, the packaging printing layer will be delaminated and the heat seal compressive strength will be reduced. As far as possible, the design scheme of hot hemming should be no pattern design. The selection of binder is also important in the composite processing process. The effective preparation of adhesive and viscosity will harm the compressive strength of sealing. In the extrusion compound or sizing process, the production temperature is high, the air oxidation level of the surface of raw materials is large, which is unfavorable for heat sealing.
3. Influence of bag making process
After the heat seal aluminum foil bag is heat sealed, the manufacturer’s edge cooling and setting are not enough. It is not allowed to clean up the thermal stress and damage the compressive strength and appearance. It is necessary to check and increase the cooling circulating water circulation.
The more the frequency of heat sealing, the higher the compressive strength of heat sealing. The frequency of vertical heat seal depends on the ratio of reasonable length of vertical welding tool to bag length; The frequency of horizontal heat seal is decided by the combination number of the machine and equipment. To excellent heat seal, the frequency of heat seal should be at least twice.
Common heat seal aluminum foil bag, its surface will generally have reflective characteristics, that is, it does not absorb light, and take multi-layer production, therefore, aluminum foil paper has good shading, but also has a strong isolation, and because of the composition of aluminum in it, it also has good oil resistance and softness.
At present, with the continuous exposure of counterfeit goods, the main problem is the safety accident of plastic bags. What people worry about is not the function of the bags, but the safety. However, consumers can rest assured that heat seal aluminum foil bag are non-toxic and tasteless. It is a green product, environmental protection product and aluminum foil bag that meets the health standard.
Masks are usually packed in a heat seal aluminum foil bag. Because of its reflective surface characteristics, multi-layer production, aluminum foil bags have good shading. If the essence of the mask can reflect sunlight, it means that the essence of the mask can not achieve good results. At this time, the heat seal aluminum foil bag has a good protective effect. For example, in summer, during the transportation process, the temperature inside the wagon box is high, and the aluminum foil bag plays an insulation role to prevent the chemical reaction of the mask’s essence, and its stability is good. At the same time, the heat seal aluminum foil bag has strong isolation, good oil resistance and softness, which can avoid the different physical and chemical reactions between mask materials and packaging, and ensure the safety of mask in transportation and storage.