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Có nên mua máy tời điện tại Siêu thị Hải Minh?

Máy tời điện là một trong số các thiết bị nâng hạ hàng hóa được đông đảo các ngành nghề ưa chuộng. Với chức năng chính là nâng hạ nhưng nó có thể nâng hạ hàng hóa với tải trọng từ 100kg đến vài tấn mà con người không thể sử dụng sức để nâng được.

Mua máy tời điện tại Siêu thị Hải Minh không?

Câu trả lời là có! Có thể bạn chưa biết, Hải Minh là một trong số các đơn vị hàng đầu chuyên cung cấp và phân phối các dòng máy móc xây dựng chất lượng cao hàng đầu tại thị trường Việt Nam.
Các sản phẩm chúng tôi cung cấp có thể kể đến như máy phun sơn, máy đầm cóc, máy đầm bàn, máy trộn bê tông...và không thể thiếu máy tời điện được.

1. Siêu thị Hải Minh -10 năm kinh nghiệm trên thị trường

Đến với Hải Minh bạn hoàn toàn có thể yên tâm về chất lượng sản phẩm bởi trong 10 năm qua chúng tôi đã đưa những dòng sản phẩm cực kì chất lượng đến tận tay người tiêu dùng và được đánh giá cực kì tốt.
Cũng nhờ sự tin tưởng đó mà Hải Minh luôn lỗ lực không ngừng để vươn lên số 1 tại thị trường Việt Nam.

2. Hệ thống chi nhánh rộng khắp cả nước

Hiện tại, tính đến năm 2022 Hải Minh có đến 8 chi nhánh từ Bắc vào Nam được đặt tại các tỉnh thành Hà Nội, Hải Phòng, Thanh Hóa, Cần Thơ, Đà Nẵng, Đắc lắc, HCM và Vinh.
Bạn dễ dàng trong việc mua và lựa chọn cho mình những sản phẩm phù hợp, đặc biệt là dễ dàng trong khâu bảo hành sản phẩm, nhanh chóng, linh hoạt.

3. Đa dạng mẫu mã, thương hiệu uy tín

Các loại may toi dien chúng tôi cung cấp đảm bảo về mẫu mã đa dạng có đầy đủ mức công suất và tải trọng phù hợp để cho Quý khách hàng lựa chọn.
Vậy bạn còn đắn đo gì nữa mà không đến ngay Siêu thị Hải Minh hôm nay, sở hữu cho mình những thiết bị tốt nhất, chất lượng nhất!
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What are the special features of vacuum bags, what material are they made of? Depending on the purpose of packaging, we can use single-layer plastic bags or laminated film packaging (multi-layer) to vacuum. In theory, all types of plastic bags can be vacuumed, as long as they are thick enough to not tear under the strong suction of the vacuum. After the air is sucked out and sealed, the packaging must remain intact so that air does not re-enter the interior. For the purpose of vacuuming for family activities, most types of thick enough plastic bags can meet well. However, in industrial production, the story is completely different. Vacuum bags for frozen foods require the ability to withstand low temperatures for a long time without drying out, a phenomenon that common plastic materials such as LDPE, HDPE or PP all face. As for the purpose of packaging to minimize the volume and volume of packages such as pillowcases, comforters, mattresses, etc., The packaging used needs to be soft and flexible but still has to be strong enough to withstand extreme suction, compressing the product inside to the smallest possible size. High-thickness Low-density Polyethylene (LDPE) bags can meet these packaging requirements. When the vacuum cleaner sucks the air out of the package, it creates wrinkles and shrinks on the package. With stiffer materials such as Polypropylene (PP) or High-density Polyethylene (HDPE), these creases can form tearing folds that lead to packaging failure. Vacuum LDPE bags can also be added to the material tank when being produced, adding a toughness additive to the material tank, which improves packaging performance significantly. Returning to the vacuum-sealed plastic bag for frozen food, manufacturers need to find a material that can withstand strong suction to completely remove the air inside, and can withstand freezing temperatures for a long time. There are many engineering plastics that can meet this requirement, but they have problems with heat sealing. And most importantly, they have not been proven to be safe and approved for food storage according to the standards issued in many countries. Using such packaging would be very unsafe, and the product contained inside would almost no longer have a chance to be exported. And the main solution is a type of laminated film packaging made up of many layers of materials combined to create outstanding properties, with the innermost layer in direct contact with the product being food safe materials (LDPE). and outer layers are engineering plastics with outstanding properties. There are many types of vacuum bags with different compositions such as PET/PE, PA/PE, PE/PA/EVOH, OPET/PP, OPA/PP, etc. There are also bags due to special requirements that are composed of 5, even 7 different layers of film. The selection of the right type of vacuum bag will be based on the needs and responsiveness of each type of material that makes them up. For example, bags made of PA/PE are safe to boil at 100°C, but cannot be sterilized at 121°C, but PA/PP or PET/PP bags can. This is because the melting point of PE is only 120°C and PP is up to 165°C. There is one thing in common among all vacuum bags currently on the market, is that they can all be considered freezer safe, because this is the core purpose of this type of packaging.
Technical data sheet: properties and parameters of plasic resin 1. Melt Flow Index (MFI) Melt Flow Index (MFI) or also known as flow rate - Melt Flow Rate (MFR) is a measure of the ability of molten plastic to move under a specific pressure. This is an important, regularly tested metric as they tell us and control the flow of molten plastic from the tank through the screw to the blow mold, die, injection molding head or any other parts that have any other shaping function. MFI is inversely proportional to the viscosity of the resin. Low MFI means high viscosity materials, they flow with greater resistance and hence slower than low viscosity materials. The MFI can be the only indicator on the technical data sheet that has no specific value that can vary significantly from batch to batch with the same resin code. This is because polymer copolymerization is unlikely to take place precisely at the molecular level. The length of the polymer chains affects the average molecular weight and viscosity of the finished product, and changes the MFI. In many cases, MFI index is the criterion to evaluate the quality of a batch produced on the same type of plastic resin and manufacturer. The MFI index tells us which materials are suitable for which type and treatment method in the manufacturing industry. Injection molding machines, blow extruders tend to be suitable for materials with high flow rates (low viscosity). The extruder is compatible with low flow rate (high viscosity) materials. Strict control of the MFI value of input materials is important to the productivity and quality of the product. The MFI number exceeds the normal level, causing the plastic to be pushed out too quickly, and if it is too low, will cause the plastic to flow out too slowly. In all cases, other parameters on the mechanical system are affected. There are two methods of measuring plastic flow, automatic or manual, based on ASTM D1238 or ISO 1133 test standards. The manual measurement process, temporarily called process A, is useful for organizations whom do occasional testing, using a variety of materials in order to find a better and more suitable material for their production of plastic products job. Process B, on the other hand, is an automated process, ideal for organizations that repeatedly test the same material under different conditions, to find the correct value for scientific purposes. Theoretically, both methods, if properly implemented, should give identical test results. The range of factors that can affect MFI flow index test results is very wide. For accurate results, it is necessary to be aware of each problem, strictly follow the equipment inspection and maintenance procedures. The plastometer machine used in the test is constructed of a temperature-controlled cylindrical material tank. The resin introduced into this tube, after being melted, is forced to flow through a capillary tube with a diameter of 2,095 mm at the bottom of the barrel, under the pressure of a piston actuated by a standard weight. The mass of molten plastic in grams that flows through the capillary in 10 minutes is the MFI of the material. There is also a slight difference between standards ASTM D1238 and ISO 1133. But they perform essentially the same function, and the manufacturers consider them to be technically equivalent. ASTM D1238 is the test method for measuring MFI flow rates for thermoplastics expressed in units of grams/10 minutes. And ISO 1133 standard defines volumetric melt rate (MVR) in cm3/ 10 minutes The melt volume (MVR) obtained in the ISO 1133 test, multiplied by the melt density gives the MFI. However, it should be noted that the density when melted plastic is not the same as the density of the material under normal conditions. For example, Polypropylene has a specific density of 0.91 grams/cm3 but their melting density is only 0.70 grams/cm3. Applying the density or density value under normal conditions to calculate the MFI with the MVR value gives misleading results.
How to calculate the weight of a plastic bag when knowing the size and thickness a. What is specific gravity or density? Specific gravity or density is the mass of matter in a given volume, is calculated by dividing the mass of matter by its volume. Here we have the formula: D = m/V, with D (Density) is the density, m is the mass and V is the volume. b. What does the density index mean? The density of a substance helps us to calculate their weight per unit volume, knowing how much heavier one substance is than another based on their density. For example, gasoline has a density of 700 kg/m3, which means that the amount of gasoline contained in a tank with a volume of 1 cubic meter will weigh 700 kg. Iron has a density of 7800 kg/m3, which means that one cubic meter of iron will weigh exactly 7800 kg. All chemical elements known to man have been found to have their densities by measuring and experimenting many times. c. How to calculate the weight of a plastic bag by density We already have the formula for density above, and when we reverse the equation, we can calculate the weight when we know the density and volume. The formula would be: m= D x V Density is given in kilograms per cubic meter (kg/m3) or grams per cubic centimeter (g/cm3). Given the very light weight of plastic packaging, converting to the g/cm3 system will help simplify the formula for calculating their mass. The density (D) of each plastic material can be found easily online, or from your packaging supplier. This parameter is printed on the plastic resins packaging that they use to create the product. For example: The density (D) of POF shrink film is 0.92 g/cm3, LDPE is 0.91 and PVC is 1.4. The volume of the bag will be calculated by length x width x height, and the height here is the thickness of the bag (of both sides of the bag combined). Don't forget to convert the thickness to cm. If the thickness is being measured in mm, divide it by 10, and if it's in microns, divide it by 10000. Let's take an example: the size of LDPE plastic bags is 80 cm x 150 cm x 70 microns, we have the formula for weight calculation as D x V = 0.91 x 80 x 150 x 0.007 = 76.44 grams/ bag. 1 kg is equal to 1000 grams, dividing 1000 by 76.44 we get 13.08. That is, with the above LDPE 80 x 150 cm bag size 70 micron thick, one kilogram will include about 13 bags.. It should be noted that the thickness in this case is for both sides of the bag, which means that each membrane layer of a bag is only 35 microns thick.