Polyester is a general term for thermoplastic linear saturated polyesters represented by PET, including PBT, PEN, PCT, and copolymers thereof. PET is the earliest developed, the largest production, the most widely used polyester products, people are most familiar with. First, performance and use The use of polyester can be divided into two major categories of fiber and non-fiber, the latter including films, containers and engineering plastics. In the early stages of polyester development, it was mainly used for the production of synthetic fibers (about 70% of PET consumption). Polyesters are also used to make 3-350μm films, insulating materials, tape bases, film or photographic film bases, and vacuum packaging. Another major area of ​​polyester non-fiber applications is the manufacture of hollow containers filled with beverages, foods, and the like. Secondly, polyester is also used as engineering plastics in electronics, electrical appliances and other fields, such as connectors, instrument housings, and hot air masks, among which the development of packaging containers has attracted attention. More than 20% of PET is now used as a packaging material, and there is an upward trend. Packaging has become PET's second largest user, second only to synthetic fiber. Second, the application of the packaging 1, polyester packaging types and characteristics of PET can be easily achieved by the rapid cooling method is basically in amorphous, highly transparent, easy to stretch PET products, so when the packaging material is PET can be The biaxially stretched packaging film can be made to obtain a high-strength, high-transparency stretch blow-molded bottle from an amorphous preform, and can also be directly extruded or blown into a non-stretched hollow container. PET film has the properties of transparency, oil resistance, fragrance protection, hygienic reliability and wide range of operating temperature (high temperature cooking and frozen packaging are all possible), but its heat sealing property is poor and must be used in combination with other films (heat sealing layer), and the price is lower The high general plastic film limits the use of PET film on packaging. PET hollow containers, especially stretch blow-molded bottles, give full play to PET performance, have a good display effect on the contents, and the performance and cost are in competition with other hollow containers. Therefore, PET as a packaging material is basically formed by stretch blow molding, of which the most widely used are small bottles of tens of milliliters to 2 liters, and large bottles of 30 liters in capacity. 2. Application examples (1) Beverage packaging In beverage packaging, the most successful polyester bottle application is carbonated soft drink (CSD), such as Coke, Sprite, etc. CSD bottles account for 1/3 of the total PET bottles. The PET bottle has a beautiful appearance, flexible design, high strength, sealing to CO2 (carbon dioxide) and reliable hygienic properties, making the PET bottle an ideal packaging container for CSD, and is the only widely used plastic container for CSD beverages to date. Statistical data from the China Beverage Industry Association in 1998 showed that PET bottles in China's CSD beverage packaging accounted for 57.4%, followed by cans and glass bottles, which accounted for 31% and 7%, respectively.
(2) Edible oil packaging PET bottles are oil-resistant, transparent, non-toxic, odorless, non-breakable, have good barrier properties to O2 (oxygen), and also have good barrier properties to ultraviolet rays, and can protect edible oils from oxidation for a long time. , not deterioration. Foreign countries have been successfully applied, and domestic demand in this area is still rising.
(3) Seasoning Packaged sauces and other sauces are a huge potential market for polyester bottles. PET bottles have good properties such as good fragrance protection, light weight, and unbreakable properties, which are favorable conditions for their application in this field. As early as 1995, Japan's application in this area has exceeded 30,000 tons. It accounts for 13% of the total consumption of PET bottles. China's such products are still mainly used glass packaging, the application of polyester bottles is still in its infancy.
(4) Beer packaging In the world, the use of plastic bottles instead of glass bottles for beer packaging is still in the trial period of research and development. Relevant departments and enterprises in China are also increasingly concerned about and pay attention to the development of beer plastic packaging.
(5) Pesticides, medicines, and daily chemical product packaging PET bottles can be used for partial pesticide packaging. Low-cost PET pesticide bottles blown with recycled materials have been put into production in China. PET bottles are safe, hygienic, and have good moisture-proof, oxygen-proof, and display functions, making PET bottles used in the field of pharmaceutical packaging. Cosmetics, detergents and other daily chemical products are also a huge market for polyester bottles. The good chemical resistance, fragrance retention, high transparency, and high gloss of the PBT and PEN bottles, as well as the flexibility of the UV rays, and the flexibility of the design, are the desirable characteristics of cosmetic products such as cosmetics. Therefore, polyester bottles are widely used in daily chemical product packaging. In particular, the new PEN resin bottles with gas barrier and ultraviolet shielding will occupy a place in the packaging of perfumes and cosmetics.
3. The new development of polyester packaging PET bottles has achieved rapid development in competition with other packaging materials (glass, tin, PE, PVC, etc.) for its superior performance, low cost, and adaptability to environmental protection. However, its low heat resistance and poor gas barrier property limit its application in hot canning and applications where high airtightness is required, and has attracted great attention. In the process of improving and improving its performance, polyester packaging has gained new development.
(1) Improved heat resistance Normal PET bottles cannot be used for the packaging of juices, teas and other hot-potted items. At present, through study, three types of practical heat-resistant polyester bottles have been developed: 1 heat-set bottles, which can meet the requirement of 85°C canning; 2 PET/PEN alloy bottles, PEN have high heat resistance, and are widely used on injection and blow-molding equipment. Can be produced in accordance with the requirements of the hot cans above 80 °C bottle, if it is heat-setting treatment, hot canned temperature up to 90 °C or more; 3 and heat-resistant poly-arylate, etc. made of multi-layer composite bottles, to improve resistance Thermal.
(2) Improve gas barrier Although PET gas barrier is much higher than polyethylene, polypropylene, polystyrene and other plastics. However, products that require more stringent preservation and taste protection, such as beer, liquor, and perfume, still cannot meet the requirements. There are three main methods for improving gas barrier properties. 1 multi-layer composite. Mainly PET, add PVDC, EVOH, MXD6, PEN and other airtight materials made of 3 or 5 bottles. 2 special treatment methods, such as coating epoxy barrier layer in the PET bottle or outer layer, or plasma treatment (ACTIS technology). 3Use other barrier resin molding, using copolymer or blend of PEN or PEN and PET as raw material, which not only improves the gas barrier property of the bottle, but also improves the heat resistance of the bottle, which can meet the beer preservation for 3-6 months. The requirements can also be alkali-washed and reused to reduce costs. Because the first two methods are poor transparency, difficult recycling process, complicated process, and special equipment requirements, and even though the airtightness is improved, the heat resistance is not enough. It can only adapt to the occasion of aseptic filling. Most of the beer industry in China Canned pasteurized technology. Therefore, the use of PEN or PRT copolymer, blends as raw materials, through the current PET bottle blowing equipment and process for molding, is suitable for China's national conditions of beer plastic packaging development direction, it is worth causing the attention of relevant departments and businesses. III. Development Prospects Polyester packaging materials are the most dynamic and promising materials in all types of packaging materials, and they are also the fastest-growing areas in many polyester applications. Polyesters such as PET and PEN have become the mainstream materials for beverage packaging such as CSD, water, and fruit juices, and will also become one of the packaging materials for beer, edible oils, and cosmetics.
The development of China's polyester non-fiber use started in the 1980s, bottle-grade polyester and polyester bottles started late, but China's polyester packaging industry is developing rapidly. In recent years, China's CSD, pure water, fruit juice and other beverages have grown at a rate of more than 20%. Therefore, the demand for beverage packaging PET bottles also grows by double digits. At the same time, bottle grade polyesters are used in non-food packaging markets (such as cosmetics. The demand for pharmaceuticals, pesticides, etc. is also increasing quietly. In 1996, the consumption of bottle-grade polyester in China was 120,000 tons, and in 1998 it was 180,000 tons. It is estimated that it will reach 300,000 tons in 2000. It can be seen that China has the largest potential market for bottle grade polyester and polyester packaging. China's packaging non-fibre polyester has great development prospects, and the polyester packaging industry will continue to develop rapidly.
Application of Polyester in Packaging
January 15 08:06:52, 2024
What is heat transfer Lanyard?
Heat transfer lanyard is sublimation lanyard is designed in the pattern, production copperplate, electric carving through the mechanical sub-color pattern engraved on copperplate. Copperplate printing machine and then get on the pattern printed on the PET film, and then through the mechanical heat transfer lanyard pattern is transferred to the product. You can see lanyards in use everywhere by businesses, schools, hospitals, at special events, conventions, reunions, and in many recreational activities.
Lanyard:
1. Material: Polyester,Nylon, cotton, PVC, bamboo fiber, tubular, reflective are also available.
2. Size: any size you want; regular sizes: width: 10mm, 15mm, 20mm, 25mm; Length: 900mm
3. Logo imprinting: Sublimation imprinting, Silk-Screen imprinting, Woven logo also can be offered.
4. Attachments: hook and buckles as shown in the below photos.
5. Color:any pattern or pantone color is OK
These are simple decorative device worn and used to protect your small belongings such as keys, ID cards, pens, pocket knife, flash and pen drives, whistles and electronic devices of various magnitude and size in order to prevent them loosing from yourself. Lanyards(Such as custom logo lanyard,heat transfer printing lanyard.) are used in situations where there is a good possibility of losing the object that you carry and use every day. These can be made to various size and length to serve various needs. Whether you are a corporate executive walking around with some sensitive information locked in your flash drive or a maintenance personnel carrying bunch of keys to the various doors of a building that you maintain, these lanyards become a handy tool for you to stay organized.
Lanyards are made from the best quality-assured and durable polyester. Polyester can get your lanyards a soft touch that gives you a quality product with a professionally finished look. Single or multiple color imprinting is possible for your lanyards. Images and texts on Imprinted Lanyards are guaranteed that it will not be damaged if washed or rubbed. We have multiple widths for polyester lanyards. We have 15 mm, 20mm and 25 mm of width for your polyester lanyards. Finish off your polyester lanyard with our wide selection of standard and optional attachments.
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Heat Transfer Lanyard
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