Chemical factors affecting baklava packaging supplies processes

Mastering the chemical composition, chemical properties and chemical changes of packaged items, understanding and studying the properties and deterioration mechanisms of items during circulation, and selecting reasonable chemical protection technical measures will help to correctly design packaging and prepare baklava packaging supplies process procedures.

1. Chemical composition of the product

The chemical composition of packaged products can be divided into three categories: inorganic components, organic components and mixed components of the two. The quality changes of packaged products during the circulation process are mainly the result of the combined effects of chemical changes, physical changes and physiological activities of the product itself, which are determined by the components of the packaged product itself and the conditions in the circulation environment.

(1) Chemical composition of food Food is divided into two categories: natural food and processed food. Natural food is unprocessed fresh and fresh food. Processed food is a product obtained by processing natural food as raw materials, such as finished grains, candy, pastries, preserves, cans, beverages, cigarettes, wine, tea, condiments, convenience foods, dairy products, pickles, etc. Its main The ingredients are carbohydrates, proteins, fats, cellulose, vitamins, minerals, etc. Fresh and fresh foods, such as fruits, vegetables, fresh fish and shrimp, etc., in addition to containing the above ingredients, are also undergoing metabolic activities and continue to

It continues to carry out biological oxidation under the catalysis of enzymes, that is, it is also carrying out normal physiological activities.

(2) Chemical composition of drugs Pharmaceutical products are drugs for the purpose of medicine and health care, including injections, liquids, powders, tablets, pills, ointments and dressings. Most of these agents are mixtures of several ingredients or materials. Some of them are composed of several inorganic ingredients or organic ingredients mixed separately, such as ginseng royal jelly, Yinqiao Jiedu Pills, etc., which are all mixed with several different ingredients.

(3) Chemical composition of cosmetics Cosmetics are daily chemical products used to protect and beautify human skin. They mainly include ointments, powders, water agents, oil agents, etc. Cosmetics contain fragrance, color, detergent, nourishment, medicine, etc. Ingredients, average

It is a mixture of various chemical ingredients or natural materials. Horizontal

(4) Chemical composition of electromechanical products Most parts of electromechanical products are made of cast iron, carbon steel, copper, aluminum and other metal materials, and most of them are cast iron and carbon steel. Their main components are iron, carbon and their compounds. Iron is a relatively reactive metal and can easily form micro-batteries with carbon and inactive impurity metals. Therefore, iron is a material that is easily corroded. In addition, after certain parts of mechanical and electrical products are burned, welded, heat treated or twisted, pressed or bent, they will cause pressure changes inside the metal. These mechanical factors will also promote the corrosion of metal, which is called "stress corrosion".

(5) Chemical composition of hazardous chemicals Chemical hazards refer to items that are flammable, explosive, highly toxic, highly corrosive and radioactive. According to their chemical properties, they can be divided into ten categories: explosive items, oxidants, compressed gases and liquefied gases, spontaneous combustion items, items that burn when exposed to water, flammable liquids, flammable solids, poisonous items, corrosive items and radioactive items. Some of these items are organic compounds composed of carbon, hydrogen, and oxygen, some are active metals or radioactive metals, and some are toxic inorganic or organic substances. Their chemical properties vary according to their types.

 

The chemical properties of packaged products refer to the properties in which the form, structure and components of the product undergo essential changes under the conditions of light, heat, oxygen, acid, alkali, salt, temperature and humidity, mainly including chemical stability, corrosiveness , toxicity, flammability and explosiveness, etc.

(1) Chemical stability of the product Chemical stability refers to the performance of the product that is not prone to decomposition, oxidation or other changes within a certain range under the influence of external factors. Chemical stability is determined by the components and structure of the product, as well as external conditions and other factors. For example, red phosphorus burns when heated to 160C, while yellow phosphorus is easily oxidized and can burn at 40C. The basic components of carbon steel and stainless steel are iron and carbon, but their corrosion and magnetism are very different.

(2) Toxicity of products Toxicity refers to the property of certain packaging products that can interact chemically with certain tissues of the organism and destroy the normal physiological functions of the organism. Toxic products mainly include medicines, pesticides and chemical products, which are divided into highly toxic and toxic products. Relevant toxicity knowledge can be found in relevant information.

(3) Corrosiveness of products Corrosiveness of products refers to the fact that certain products, when in contact with living organisms or metals, can cause corrosive burns and rust to organisms, or cause destructive chemical changes to other substances. The main cause of corrosion is contact with acids, alkalis or salts.

(4) Combustion and explosiveness of the baklava packaging supplies product. Combustion is an oxidation reaction, usually caused by heat and light. Divided into four categories: flammable liquids, flammable solids, spontaneous combustion items and items that burn in case of fire. Explosiveness refers to the process in which a product instantly changes from a solid or liquid state to a gaseous state, releasing a large amount of energy in the form of mechanical energy and making a loud sound in nature. According to the cause, it can be divided into physical explosion and chemical explosion.

 

Microbial groups are complex and diverse, and can be roughly divided into two categories: cellular and non-cellular. Microorganisms that have a cell shape are called cellular microorganisms. The bacteria, molds and yeasts mentioned here are all cellular microorganisms. According to their cell structure, they can be divided into prokaryotic microorganisms (such as bacteria) and eukaryotic microorganisms (such as molds and yeasts).

(1) Bacteria Bacteria are the most widely distributed and numerous microorganisms in nature and are closely related to humans. They are the main research object of microbiology. The morphology of bacteria is diverse. When environmental conditions change, the morphology also changes. However, under certain environmental conditions, various bacteria often maintain a certain shape. Bacteria have three basic shapes: spherical, rod-shaped and spiral-shaped, which are called cocci, bacilli and spiral bacteria respectively.

(2) Mold Mold is not a taxonomic name, but a general term for some filamentous fungi. They are widely distributed in nature. They often cause mold and mildew in agricultural and sideline products, clothing, food, raw materials, packaging materials, etc., and are closely related to people's daily life and packaging production. Related.

(3) Yeast Yeast is a group of single-celled eukaryotic microorganisms that have a wide range of uses. They can be used to ferment bread and make wine, and can also produce alcohol, glycerin, mannitol, organic acids, vitamins, etc. The protein content of yeast cells is as high as more than 50% of the dry weight of the cells and contains essential amino acids for the human body. Some yeasts can be used to dewax petroleum, lower the freezing point of petroleum, and prepare nucleic acid and enzyme preparations.

Yeast also often causes harm to humans. Saprophytic yeasts can spoil food, textiles and other raw materials. A small number of hypertonic yeasts can spoil honey and jam; some have become polluting bacteria in the fermentation industry. They consume alcohol and reduce production; or produce bad odors, affecting baklava packaging supplies products. quality. Certain yeasts can cause diseases in humans and plants. For example, Candida albicans can cause a variety of diseases of the skin, mucous membranes, respiratory tract, digestive tract, and urinary system. Cryptococcus neoformans can cause chronic meningitis, pneumonia, etc. Yeast mainly grows in acidic environments with high sugar content, such as on fruits, vegetables, nectar and plant leaves.

 

Blister packaging is a packaging method in which the packaged items are sealed between a blister formed of a transparent plastic sheet and a substrate (made of cardboard, plastic sheet, aluminum foil or their composite materials).

Skin packaging is to place the packaged items on a breathable substrate made of cardboard or plastic sheets, cover it with a heated and softened plastic film or sheet, and then evacuate through the substrate to tightly wrap the film or sheet. A packaging method that holds items and seals them around the substrate.

Both packaging methods use a substrate as the basis, also called substrate packaging or card packaging. Its characteristic is that the packaging has a transparent appearance, allowing users to clearly see the appearance of the item. At the same time, exquisite patterns and product instructions can be printed on the substrate for easy display and use. On the other hand, the packaged items are fixed between the film sheet and the substrate and are not easily damaged during transportation and sales. This packaging method can not only protect items and extend the storage period, but also play a role in promoting official products and expanding sales. On the market, it is mainly used for packaging items with complex shapes that are fragile due to pressure. Items such as medicine, food, cosmetics, stationery, small hardware tools and mechanical parts, as well as toys, gifts, decorations and other items are most common in self-selected markets and retail stores.

From the perspective of packaging materials, the two packaging methods belong to the same type, but their principles and functions as well as the packaging process have their own characteristics.

1. Common points between blister packaging and skin packaging

D. Generally, the packaging is transparent so that the contents can be seen and can be hung and displayed.

2. can pack items with complex shapes and can pack items in groups or with many parts.

Outside of packaging, craftsmanship

3. Through the shape of the substrate and exquisite printing, the promotional effect of the product can be enhanced.

@Compared with other baklava packaging supplies methods, packaging costs are higher, labor consumption is high, and packaging efficiency is low 2. The differences between blister packaging and skin packaging

D product protection. Blister packaging has barrier properties and can be vacuum packed. However, body-fitting cannot achieve 2-pack operation. Blister packaging is easy to implement automation or assembly line production, but it requires the replacement of molds. It is suitable for small-scale and large-volume packaging production. Skin-fitting packaging is difficult to achieve automation or assembly line production, and the production efficiency is low. However, it does not require the replacement of molds and is suitable for multi-variety and large-volume packaging production.

3Packaging cost. The packaging materials and packaging equipment of blister packaging are relatively expensive. For large and heavy items with small batches, the cost is higher due to the need to make molds. Skin packaging is generally cheaper, but requires more labor and is more expensive in mass packaging production.

4 .packaging effect. Blister packaging is more beautiful and can increase the value of the product. The appearance of skin-fitting packaging is slightly worse due to the small holes for vacuuming on the substrate.

Therefore, blister packaging is suitable for large quantities, small items, and items that do not require good barrier properties. Skin packaging is suitable for small batches of items with complex shapes that are easily damaged during circulation and do not require barrier properties.

 

Blister packaging was first used for pharmaceutical packaging. In order to overcome the inconvenience of taking medicines in glass bottles, plastic bottles and other bottles, blister packaging appeared in the 1950s and was widely used. After in-depth research and continuous improvement of blister packaging materials, processes and machinery, it has made great progress in terms of packaging quality, production speed and economy. Nowadays, in addition to the packaging of pharmaceutical tablets, capsules and suppositories, it is also widely used in the packaging of food, daily necessities and other items.

Blister packaging can protect items from moisture, dust, contamination, theft and damage, extend the storage period of goods, and the is transparent with instructions for use printed on the substrate, providing convenience to consumers. The medicine is packaged on an aluminum foil substrate according to the dose. The name of the medicine, taking instructions and other information are printed on the back of the aluminum foil. It is called PTP (press through pack) packaging abroad and is called press-through packaging in China because when taking it, it is pressed by hand. With the blister, the medicine can be taken out through the aluminum foil of the backing, or directly put into the mouth to avoid contamination. Some small items such as ballpoint pens, knives, cosmetics, etc. are packed in blister packaging with cardboard backing. The backing can be made into a hanging type and hung on the shelf, which is very obvious and plays a role in beautification and publicity, which is beneficial to sales