Food packaging bags are a relatively large class of products used in the packaging industry today, so it is necessary to pass the quality. What quality inspections should be done before leaving the factory? Let me introduce you in detail:
First, the inspection items of food packaging composite film bags are mainly divided into the following categories:
Appearance should be flat, no scratches, burns, bubbles, oil breaks and wrinkles, heat seal flat, no virtual seal. The film must be free of cracks, voids and composite layers. No pollution, foreign matter and oil stains. Bag soaking liquid, no odor, odor, dirt and discoloration.
Second, physical and mechanical properties
It includes tensile strength and elongation at break. It reflects the ability of the product to undergo stretching during application. If such an item is unqualified, the food packaging bag will simply exhibit cracking and damage during the application process.
In addition, it also includes gas barrier targets such as gas permeability; oil resistance target, heat resistance, cold resistance, medium resistance; bag peeling force, bag pressure resistance and drop resistance, etc. These objectives reflect the food packaging bag. Reliability of the maintenance of the inner packaging.
Plastic film bags must be processed by heating, and plastics have problems of cracking, oxidation, degradation, and enthalpy when heated. Therefore, when processing plastic film or bag with resin, it is necessary to participate in antioxidants in the resin. Auxiliary agents such as heat stabilizers. Some packaging film bags also require antistatic agents, anti-fogging agents, lubricants, opening agents and other additives because of the anti-static, anti-condensation, and high-slipness requirements of the packaging process and mechanical or content requirements. All of these additives must first be tested by GB15139 "Food Safety Toxicology Review Procedure" to prove that they are non-toxic and can be used, but there is also an increase in the amount of constraints. Therefore, in the product, these low-molecular-weight substances that can be extracted, that is, transpiration residues, or things that can be oxidized and oxidized, that is, the consumption of potassium permanganate, cannot exceed the prescribed amount, and cannot be used if it exceeds the specified amount. . Therefore, there must be corresponding hygienic specifications for the molded products. The purpose is to avoid the indiscriminate use and indiscriminate use of the additive, which is to ensure that the materials directly packaged and touched with food have high hygienic safety performance.
Fourth, the material
At present, China is not accustomed to the development of professional products during the development of technical specifications for flexible packaging. For example, the structure of composite data flexible packaging is rapidly developing. The only information used is PE, PP, PVC, PVDC, PET, PA, EVOH, EVA. , EEA, EMA, ionic polymer and a variety of inks, adhesives and other dozens of materials, the existing composite packaging data specifications only cover BOPP, LDPE, BOPA, PET, aluminum foil and other materials, and many other structures of composite film data The inspections are not regulated, and can only be implemented with reference to existing specifications and related specifications.
Secondly, the new post-processing method for composite flexible packaging is continuously introduced. There are many requirements depending on the content of the package and the scope of use, such as in the food packaging category, except for traditional pasteurization, boiling, 121 °C cooking, 135 °C cooking, microwave packaging, vacuum packaging, etc., the physical and chemical effects of the composite film bag are not the same as the general boiled heating, so only the technical specifications of the cooking film bag are not enough. There are many composite soft packaging originals, accessories such as various films, adhesives, solvents, additives, many of which lack corresponding professional norms or national regulations.
The professional and national standards of Dongguan Bite Packaging Bags are strictly enforced, strengthen the inspection and supervision of food packaging, avoid unqualified food packaging from entering the mall, coordinate and strengthen management, and ensure the healthy development of the flexible packaging profession.