Warm Global Customers
With China Plastic Machinery
With China Plastic Machinery
Plastic containers are hollow blow-molded containers, which are processed by hollow molding. There are open plastic barrels, cans and closed plastic barrels, cans. Open plastic barrels and cans are mainly used to hold solid chemicals, food, medicines, etc.; closed plastic barrels and cans are mainly used to hold liquid substances. It has the characteristics of light weight, not easy to break, corrosion resistance, and recyclability. Its maximum volume is 450L and the maximum weight of loaded goods is 400kg.
The following issues must be paid attention to during the design and production of plastic containers: inflation, elongation, vertical load strength, container rigidity, supporting surface, cover thread, shape and outer surface and molding, temperature, pressure, etc., to ensure the mechanical properties, molding, mold structure and processing rationality of plastic containers and container use conditions. Its process flow is: mixing ¡ú screw extrusion ¡ú mold clamping ¡ú blow molding ¡ú mold opening ¡ú cooling ¡ú trimming ¡ú inspection.
Plastic containers used as export commodity transport packaging shall be inspected in accordance with SN/T0271-93 "Inspection Procedures for Export Commodity Transport Packaging Plastic Containers" and shall be implemented in accordance with GB/T13508-92 "Polyethylene Blow Molded Barrels".
(1) Appearance: The wall thickness ratio of the symmetrical parts of the barrel body shall not exceed 2:1, there shall be no sand holes or poor plasticization, the outer wall and mouth shall be smooth and clean, there shall be no more than 2 bubbles with a diameter of no more than 2mm, the length of black spot impurities shall not exceed 4mm, the barrel mouth parts shall overlap tightly and have good interchangeability.
(2) Performance inspection: Open plastic containers shall be subject to vertical impact drop test, stacking test, and sealing test. Closed plastic containers shall be subject to vertical impact drop test, stacking test, airtight test, and hydraulic test. Plastic containers with mounted handles and integral handles shall also be subject to suspension test.
¢ÙVertical impact drop test: The sample shall be tested at -18¡æ. Drop height: If water is used as a substitute, the density of the intended goods is not more than 1.2, the drop height is 0.8m; the density of the intended goods is more than 1.2, the drop height is 0.67m¡Ádensity. For the drop position, please refer to SN/T0271 "Inspection Procedures for Plastic Containers for Export Commodity Transport Packaging".
¢Ú Stacking test: test temperature 40¡æ, stacking time 7 days.
Stacking mass is calculated as follows:
M0=(H/h-1)¡ÁM1
Where: M0¡ª¡ªStacking mass applied to plastic container, kg;
M1¡ª¡ªSingle package mass, kg;
H¡ª¡ªStacking height, 3m;
h¡ª¡ªHeight of a single plastic container, m.
Note: The value of H/h should be rounded to an integer.
¢ÛAirtightness test: 20kpa.
¢ÜHydraulic test: 100kpa.
¢Ý For sealing test and suspension test, please refer to GB/T13508-92.
PET (1) Polyethylene terephthalate, suitable for bearings, chains, gears, tapes, etc.;
HDPE (2) High-density polyethylene, suitable for packaging, building materials, buckets, toys, etc.;
PVC (3) Polyvinyl chloride, suitable for making rods, tubes, plates, oil pipelines, wire insulation, seals, etc.;
LDPE (4) Low-density polyethylene, suitable for packaging plastic bags, plastic flowers, plastic bottles, wires, packaging materials, etc.;
PP (5) Polypropylene (Polypropylene), suitable for packaging bags, wire drawing, packaging materials, daily necessities, toys, etc.;
PS (6) General-purpose polystyrene, suitable for lampshades, instrument shells, toys, etc.
Be sure to read the numbers when buying plastic containers
Each plastic container has a small ID card, a triangle symbol, usually at the bottom of the plastic container. There are numbers 1 to 7 in the triangle, and each number represents a plastic container. They are made of different materials and have different taboos in use.
"No. 1" represents polyethylene terephthalate (PET, commonly known as polyester resin), which is often used to make mineral water bottles and carbonated beverage bottles. Beverage bottles are heat-resistant up to 70¡ãC when used, and are only suitable for warm or frozen drinks. They are easily deformed when filled with high-temperature liquids or heated, and substances harmful to the human body will melt out.
"No. 2" represents high-density polyethylene plastic (HDPE), which is mostly used to make containers for cleaning supplies and bath products. It is recommended not to recycle if it is not cleaned thoroughly.
"No. 3" represents polyvinyl chloride (PVC), which is rarely used in food packaging at present, so it is best not to buy it.
¡°No. 4¡± stands for low-density polyethylene plastic (PE), which is a common material for producing cling film, plastic film, etc. Cling film is not very heat-resistant. Usually, qualified polyethylene cling film will melt when the temperature exceeds 110¡ãC, leaving some plastic preparations that cannot be decomposed by the human body. Therefore, you should avoid using cling film to wrap the surface of food for heating.
¡°No. 5¡± stands for polypropylene (PP), which is used to produce microwave lunch boxes. The only plastic box that can be put into a microwave oven can be reused after careful cleaning.
¡°No. 6¡± stands for polystyrene (PS), which is often used in the production of bowl instant noodle boxes and fast food boxes. It is heat-resistant and cold-resistant, but it cannot be put into a microwave oven, and it cannot be used to carry strong acids (such as orange juice) and strong alkaline substances. It will decompose polystyrene that is harmful to the human body and is easy to cause cancer.
¡°No. 7¡± stands for polycarbonate (PC) and other types. PC is a material that is used in large quantities, especially in the manufacture of baby bottles, space cups, etc. It is easy to release the toxic substance bisphenol A, which is harmful to the human body. Do not heat it when using it, and do not expose it to direct sunlight.
Extended reading
"Bisphenol A" can easily cause endocrine disorders
Bisphenol A, also known as BPA, is widely used in the packaging industry and is also called polycarbonate in industry. Bisphenol A can cause endocrine disorders and threaten the health of fetuses and children. Cancer and obesity caused by metabolic disorders are also believed to be related to this. Bisphenol A is widely used in the manufacture of baby bottles and food containers. During the process of feeding babies, low doses of BPA substances will decompose from the BPA-containing bottle material at high temperatures and enter the solution.
In addition, in April 2008, the US government health agency issued an experimental report stating that low doses of bisphenol A are carcinogenic and high doses of bisphenol A are related to the incidence of cardiovascular disease. In addition, bisphenol A has estrogen effects and may cause feminine changes in babies.
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