Soft packaging materials have a certain degree of heat sealability, flexibility, alkali resistance, abrasion resistance, and because of light and other reasons, a large number of applications for food packaging, pharmaceutical packaging and so on. Soft packaging materials have distinct layers of print products, and have a strong sense of three-dimensionality. In addition, the true reproduction of colors has increased consumers' desire to purchase. Commonly used flexible packaging materials mainly include cellophane, plastic film, composite film, vacuum aluminized film and aluminum foil, among which flexible packaging mainly consisting of plastic film and aluminum foil plays an important role in packaging and printing. The composite film made of cellophane, plastic film and aluminum foil as the base material overcomes the disadvantages of the single-layer film, and combines the advantages of various layers of materials to meet the requirements for different levels of packaging of goods, and has become an ideal packaging. material. This article focuses on the analysis of the printing characteristics of flexible packaging and printing styling, and introduces various printing techniques for flexible packaging materials.
1 Plastic film
Commonly used plastic films are: PE, PP, PVC, PS, PVA, PC, PET, CA, NY. The printing characteristics of these plastic films are: 1 plastic film is a non-polar polymer compound, poor adhesion to printing ink . In order to make the surface of the plastic film have good ink adhesion and enhance the firmness of the printed product, surface activation must be performed before printing. The commonly used method is the corona treatment method. The principle is that the plastic film is subjected to high-frequency voltage discharge shock, which makes the non-polar surface rough, the adsorption capacity is greatly enhanced, and the adhesion of the ink is also enhanced. The surface tension of general BOPP, CPP, PE and other substrates should be 38 ~ 42dny/cm to meet the printing requirements; 2 easily subject to the relative humidity of the surrounding air and telescopic deformation, resulting in poor overprinting; 3 affected by the change in tension Thin film printing fluctuations occur.
2 cellophane
The characteristics of cellophane are: high transparency, good gloss, exceptionally bright color after printing, which is beyond the reach of plastic film; good printability, no need for any treatment before printing; cellophane also has antistatic properties, and is not easy to attract dust , To avoid the printing of text and other printing failures. However, the moisture-proof property is poor, and the film is easily deformed due to the influence of temperature and humidity, resulting in difficulty in registering the image when printed. After entering the warehouse, general materials must be wrapped with other plastic film and placed in a ventilated and dry place. The temperature should be 23°C～25°C.
3 Aluminum foil
Aluminum foil is characterized by: 1 light, with a metallic luster, good light protection, high heat and light reflective ability, metallic luster and reflection ability can increase the brightness of the printing color; 2 good barrier properties, strong protection, not Breathable, can prevent moisture absorption of the contents; 3 shape stability, not affected by changes in humidity, easy to process; 4 can not be forced, pinholes and wrinkles, etc., in general, not alone, usually with paper, Plastic film is processed into composite material. Since aluminum foil has the above advantages, it is widely used in the field of food and pharmaceutical packaging. The aluminum foil and the plastic film can be made into a cooking bag, which can package cooked food. The multilayer composite film is also used for biscuits, snacks, beverages and other small food packaging.
4 vacuum aluminum film
The main role of vacuum aluminum film is to replace the aluminum foil composite, so that soft plastic packaging also has a beautiful silver-white gloss, improve the soft packaging film bag barrier properties and shading, thereby reducing costs. The vacuum aluminized substrate films are relatively high melting point films such as polypropylene films, including CPP, IPP, BOPP, PET, NY. Glass paper can also be vacuum-plated directly after pre-treatment or wet treatment. Indirect processes can be used for PE and PT films. In order to improve the firmness of aluminum plating, the method of applying a primer to a substrate film to be plated is adopted in foreign countries. However, in China, there is generally no primer surface, and corona treatment is performed only on the surface. The method of vacuum aluminum plating of the film: one is to perform reverse printing on the mask of the film, that is, to print in the inner surface of the film, and then vacuum-aluminizing and then compounding with the bottom film. It should be noted that when vacuum-plating aluminum on a printed mask, although it is printed on the inside, it is not necessary to use the printed ink, and it is only necessary that the ink be excellent in heat resistance. Vacuum aluminum plating has better fastness. Compared with aluminum foil, vacuum aluminum plating greatly saves the amount of aluminum. The former is 1/100 to 1/200 of the latter, but it has metallic gloss and barrier properties. Because the thickness of the vacuum aluminum plating layer is relatively thin, 0.4-0.6 μm, it can not be used in place of replacing aluminum foil composite films requiring high barrier properties such as vacuum packaging and high-temperature cooking bags. Because the cost of vacuum aluminum plating is lower than that of aluminum foil, vacuum aluminum film will be greatly developed in the fields of food trademarks and other fields. Vacuum aluminum-plated paper is gradually replacing aluminum foil in the packaging of cigarettes, cold meal cartons, and chewing gum. Dry composite vacuum aluminum coating has good effect, but it must pay attention to two points: (1) The estimated amount of glue must meet the demand of packaging, generally between 3.5 and 5g, so that it can withstand high temperatures without affecting the firmness of the interlayer film; 2 Composite vacuum aluminum coating must use special glue, solid content of not less than 75%.
5 composite film
Composite films are widely used in food packaging, such as fast food in shopping malls, frozen foods, puffed foods, etc., which are made of composite film. The composite film can not only maintain the excellent characteristics of the single-layer film, but also make up for their respective deficiencies. The composite film has new features to meet the different requirements of the product on the film. Such as: food packaging requirements of the film with moisture, gas, light, oil, high temperature, acid and alkali resistance, heat sealing and other good performance, but also has good printability and decorative arts effect, its performance and requirements are A single film is difficult to reach. The PE film used most often has excellent transparency, moisture resistance, heat resistance, and chemical stability, but its oil resistance and oxygen resistance are limited, and printability is poor. PET and PA films have high tensile strength and fatigue strength, but the former has poor moisture resistance, and the latter has poor heat sealability and chemical resistance. PE (glass paper) has excellent transparency, no static electricity, no pollution and easy adhesion, but its toughness, water resistance and moisture resistance are all poor. Aluminium foil has scintillating metallic luster and thermal conductivity properties, and has good performance in blocking moisture, vapor, light, and grease, but has the disadvantages of easy cracking, lack of flexibility, adhesiveness, and the like. Each layer of the film is compounded together, and has excellent properties such as moisture-proof, air-proof, light-blocking, heat-resistance, oil resistance, and heat-sealing property, and becomes an ideal packaging material. For example, the current high-grade RP-H cooking bag is a three-layer composite film with a plastic film as the base material. Its middle layer is an aluminum film, which has good insulation properties and is conducive to long-term food storage. The outer layer is BOPP film. , with excellent dimensional stability. Back gravure printing, compounding with aluminum foil with adhesive to ensure the firmness and smoothness of the printed ink film. The inner layer is made of PE film, which uses its advantages of heat resistance, softness, and easy sealing. After the three components are compounded, they can be sterilized at a high temperature of 120°C. Microorganisms will not invade, and they can maintain freshness and taste. There are many types of film composites, common are cellophane film composites, plastic film and plastic film composite, aluminum foil and plastic film composite, aluminum foil, cellophane and plastic film composite, a variety of paper and its printed matter and a variety of plastic film composite, etc. There are as many as 30 to 40 kinds, and the number of composite layers is generally 2 to 5 layers. The basic structure of various composite films is PT, BOPP, NY, PET and other non-thermoplastic or high melting point films as the outer layer, PP, PE as the inner layer.
Author: Chen Xiaoshun
Reprinted from: Print World
Bear pillow is a kind of Plush Toy that girls love very much. The market is in great demand. Its main material is made of plush fabrics and PP cotton filler. Plush cloth it mainly contains four kinds. The first kind of ordinary yarn, which belongs to BOA material, can be divided into light yarn, which is usually glossy and can be divided into Yin and Yang in different directions. And matte gauze namely dumb lubricious, do not have Yin and Yang face basically. The second kind is called special yarn, have flat cut wool cloth and long and short wool, wool length is controlled in 4-20mm range. The 3rd kind calls plush, wool grows in 20-120mm limits, 20-45mm limits can do any wool to grow inside, 45mm above has 65mm and 120mm only, belong to length wool, wool is straighter, not easy curl. The 4th kind is called roll wool, most are granular wool, lamb wool, or wool root is bundle shape, roll above. PP cotton, commonly known as doll cotton, hollow cotton, also known as the wadding, artificial chemical fiber material of polypropylene fiber, polypropylene fiber is (a kind of plastic lighter density, special attention is that polypropylene fiber is different from the polyester don't confuse) from craft to distinguish: mainly have hollow fiber and two, the product has good resilience, feel is smooth. The company's production of bear pillow shape lovely, soft touch, needle and thread density, exquisite workmanship. Delicate suture does not deform, does not fade, does not shed hair. A bear pillow can be given as a gift. If a man gives a girl a bear pillow during the period of love, it can make your love sweeter, more romantic and happier. Bear pillow is also the best companion and confidant to accompany children's growth.
Production process:
Shape design – Proofing – Typesetting – Tailoring – sewing - Nail eyes and nose - Hand sewing seam – modelling – Forming - Needle inspection - Check goods – Packing
1.First of all, the design department or the customer handed in the sample, and then handed in the blanking workshop, and blanking
2.Locomotive sewing, the main task is to sew the main body, cloth label, sewing accessories
3.Installation of nose, eye and other accessories
4. Filled cotton
5. Hand sewing, shaping
6. High Pressure Air Pump Blows off Surface Fluff
7. Inspection, while cutting off the thread head and brushing off the wool
8. Play hang tag, pack and deliver goods
In recent years, the company's various businesses have maintained a sustained and stable development, its production and sales for many years ranked among the top of the same industry in China, the company's sales revenue, profit and tax increased year by year trend.
The company's products enjoy a good reputation overseas, 95% of the products exported, the main international markets include Europe, Asia, North America and South America and so on.
Company products to environmental protection materials, exquisite technology, various supporting facilities, advanced technology, perfect management, excellent quality, reasonable price, rapid development, strict confidentiality, perfect after-sales service. Only detailed product drawings (or samples) can provide customers with one-stop service from development to after-sales service.
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SHEN ZHEN HAO XIAN LONG TECHNOLGY.CO.,LTD , http://www.haoxianlongtoys.com