The hottest medical plastics are three high, high

2022-09-24
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Medical plastics "three highs": high safety, high precision, high energy efficiency

for the plastic industry, the medical application field is undoubtedly a "money" infinite Treasury, from relatively simple plastic products such as syringes, pipettes, Petri dishes and measuring cups, to complex integrated medical devices such as insulin measuring pens, dialyzers, ultrasonic nebulizers, medical X-ray machines, etc. all use plastic materials. Because the use of these products is closely related to human health and even life, the requirements for their manufacturing materials and production process are very strict: the materials should be safe and reliable, and the production workshop should be clean; Precision production equipment, low cost and high efficiency

high safety

safety is the most basic requirement of medical plastic products, which mainly depends on whether the product is safe for medical staff, patients and post-use treatment of the product. It needs to be comprehensively considered from many aspects, such as product design, selection of raw materials, production process and processing production process, production environment, product quality and technical indicators

when plastic is used as a medical material, it should generally meet the following requirements: it is non-toxic to the body, non carcinogenic, does not cause allergic reactions or interfere with the immune mechanism of the body; The biocompatibility of the implanted material is good; Materials in contact with blood must have certain anticoagulant properties; It can withstand the disinfection process without deformation, etc

the research on PVC alternative materials is a hot spot in recent years. PVC is currently the largest polymer used and used in the medical industry, but it may release phthalates, which will cause potential harm to human health. TPU is considered to be a safer alternative material. First of all, TPU has the same biological, mechanical and processing properties as PVC, and does not need plasticizers to obtain flexibility, so there is no risk of phthalate migration. In addition, TPU has enough hardness before being inserted into the human body, and the flexibility after entering the human body can ensure that patients feel comfortable. However, medical grade TPU is expensive. At present, it is mainly used in high value-added precision interventional catheters, artificial heart assist devices, artificial blood vessels, etc. As medical grade TPU requires high purity and strict reaction and process conditions, the production technology is only concentrated in the hands of several foreign enterprises, such as BASF, kostron (former Bayer Materials Science), Lubrizol, Dow Chemical and Huntsman

the demand for silicone materials in the medical field is also increasing. Compared with PVC, it has obvious advantages in anti infection, sealing and bonding, waterproof, non irritating and so on. Dow Corning, Bluestar silicone and wacker have made great achievements in this field. Among them, the silicone film launched by Wacker can allow gases such as water vapor and oxygen to diffuse through the film, and can be used to produce breathable wound tapes that are conducive to the rehabilitation process, or used as breathable films in medical devices such as artificial heart lung machines

in addition to strict requirements for production materials, medical plastic products also have very strict requirements for processing equipment. Especially for medical products with special requirements for the use environment, such as testing, testing, containers and organs, clean rooms must be used when forming. Many processing equipment suppliers have developed many solutions for this. For example, Netstal has formulated special rules and production procedures for the design and production of injection molding machines for medical use, and set up an independent injection molding machine production area in the clean room, where specially trained personnel assemble injection molding machines for the clean room. At the same time, it also provides a variety of special configurations, including: water-cooled drive motor, which can avoid the vortex air flow formed during air cooling; Special alloy coating treatment on the surface of movable formwork and fixed formwork; Non toxic hydraulic oil conforming to FDA standards

high energy efficiency and high precision

in an era of rapid change, high energy efficiency is the common goal of all businesses. Usually, medical product manufacturers require processing equipment to produce the best quality products with the highest equipment stability and safety under the condition of the shortest cycle as possible. Therefore, automation and system integration solutions have become the focus of attention

high precision is also the key requirement of medical plastic products. For example, syringes and pipettes require high cross-sectional accuracy of rounded corners and through holes, while Petri dishes require high dimensional accuracy; Inhalers, insulin measuring pens and other products are assembled from multiple precision components that are complex and can complete specific functions (such as storage, atomization and measurement), so there are high requirements for the matching accuracy and mutual force between plastic structural parts. Moreover, under market pressure, today's medical devices tend to be miniaturized and multifunctional. Therefore, these products require a more stable processing and production system and more accurate control

injection molding products are the largest variety of medical plastic products, and all electric injection molding machines are considered the preferred production equipment because of their obvious advantages in high speed, high efficiency, precision and energy saving. Alberg's electric injection molding machine allrounder 520 A is specially designed to meet the high quality requirements of the pipette suction head. The clamping force is 1500 kn, the specification of the injection molding unit is 400, 64 pieces are produced each time, the molding cycle time is only about 4.5s, and the molded parts produced are 0.35g. Its energy consumption is 50% lower than that of standard hydraulic injection molding machine

in terms of micro injection molding, a micropower 15/10 micro injection molding machine with a mold locking force of 15t, which Amway has bravely jumped to the international market, can produce micro parts with a weight of up to a few milligrams. Don't you know how the tensile testing machine is maintained. The manufacturing of micro components uses turntable technology, using six cavity molds with one part at the top and two parts at the bottom. The material used is polyformaldehyde. These injection molded micro components can meet the special requirements of medical technology and are used for the penetration test of special medical injection needles. For example, they are used to manufacture insulin pens, which can maximize the comfort of patients

in the field of medical parts, it is becoming more and more important to produce a composite part through multi-component molding, that is, to complete the assembly of single parts with different raw materials or functions in the mold. For example, through in mold assembly, a seal can be added to the inhaler housing. For the application of special processes such as multi-component injection molding and in mold assembly in the medical industry, Engel can provide a series of injection molding machines equipped with multiple injection units. For example, a pull rod free Engel e-victory 160 combi oil electric hybrid injection molding machine designed for a dust-free room is used to produce a blood transfusion dripper integrated with a filter. The upper and lower parts of the dripper are made of polystyrene and polypropylene respectively. The two parts are injected at the same time, and then the filter is inserted into the same mold, and then another part of PP composite molding is used to fix it. The cycle time of the whole process is only 12 seconds

3d printing has a vast prospect

in only more than 20 hours, a "private customized" skull can be held in your hand - yes, this is the magical speed that 3D printing can create. At a recent medical exhibition, an enterprise in Shanghai used a complete skull printed with photosensitive resin 3D to attract attention. This "skull" can help doctors rehearse the surgery in advance and operate the knife accurately, which is also the most widely used example of auxiliary medicine at present. The other two deeper research directions are personalized permanent implants and 3D printing of cells and tissues. In the health care industry, 3D printing has become the mainstream practice of customizing medical supplies such as hearing aids and oral diagnosis and treatment devices for individuals. At present, some other 3D printing technologies are still a long way from large-scale application, but what is the reason why the hydraulic universal experimental machine can not reach the load in the future? The market prospect is highly expected by everyone. Facing the unexplored "multi gold" market, material developers can't help but take a share. For example, former Bayer materials technology, officially renamed kostron in September, announced that it would turn its many products and raw materials to 3D printing applications, especially TPU materials with excellent interlayer adhesion, and has begun to provide PC materials that can be used for 3D printing

concurrent activities of the exhibition: the second medical plastics forum

in the "made in China 2025" plan with the goal of becoming a manufacturing power, the biomedicine and high-performance medical device industry has been identified as a key development area, which will certainly drive the industry's keen demand for medical grade plastics. To this end, during Chinaplas 2016 International Rubber and plastic Exhibition (April, Shanghai New International Expo Center (Pudong)), the "second medical plastics forum" will be held. Experts from all over the world will share the latest development of medical grade polymers and the leading production technology of medical devices, consumables and medical packaging. Chinaplas 2016 International Rubber and plastic exhibition, which brings together the world's most advanced materials and technologies, can provide guidance for the industry. The on-site exhibits cover medical rubber and plastic materials, molds, injection molding and packaging processes, automatic production equipment, clean room solutions hr45n and testing technology, which will help you develop new market space. At present, the well-known exhibitors of rubber and plastic machinery and raw materials that have reserved booths include: arbor, Zhenxiong, Davis standard, Engel, Nordson, Haitian, Klaus mafi, Hesky, master mold, meimeimeichuangyi, mirakron, Liu Dao, yizhimi, HASCO, Shulman, BASF, kostron, DuPont, Dow Corning, Eastman, ExxonMobil, caber Jiaobao, Lubrizol, Solvay, etc

2016 International Rubber and plastic exhibition is expected to have more than 140000 professional visitors from 150 countries/regions to visit the exhibition to negotiate business and purchase. It has attracted many internationally renowned medical device and pharmaceutical manufacturers and medical packaging enterprises to participate in the grand event, including Mindray, lippon, Philips Wellcome, Kaikai, Siemens, kantler, Delger, camel group, micro invasive, Baite, Yangpu, Renolit, Sena medical packaging, Changjian medical packaging, Foshan special medical catheter, Yabao pharmaceutical, medical plastics special committee of China Plastics Processing Industry Association Guangdong Pharmaceutical Industry Association, etc

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