There are as many as 15 national standards on food containers and packaging according to different plastics, and most of them are mandatory standards.
national standard for plastic products
1.gbn84-81 hygienic standard for polyethylene molded products
2.gbn85-81 hygienic standard for polypropylene molded products
3.gbn86-81 hygienic standard for polystyrene molded products
4.gbn87-81 hygienic standard for melamine molded products
7-83 PVC microporous plastic slippers
7. GB 3831-83 Soft PVC calendered film (sheet)
8 p>8． GB4185-83 Semi-rigid PVC block plastic floor
9. GB 4217-84 Nominal external diameter and nominal pressure of thermoplastic plastic pipes
11.GB4219-84 for chemical use. Vinyl chloride pipe fittings
12.GB4454-84 rigid PVC sheet
13.GB4455-84 polyethylene blown film for agriculture
14.GB4456-84 polyethylene blown film for packaging
15.GB5664-85 high-density polyethylene monofilament
16. GB 5736.
18.GB5738-85 beverage plastic turnover box
19.GB5739-85 beer plastic turnover box
21.GB5836-86 rigid PVC pipes and fittings for building drainage
21.GB6668-86 PVC knitted fabric-based foamed artificial leather
22. ZBY. Phenolic tape bearing
24.ZBY28113-85 calendered PVC hard sheet for food packaging
25.SG 8-67 PVC plastic sole
26.SG 22-73 PVC plastic for cable industry
27.SG 78-74 rigid PVC pipe
28. SG 79-79. P>31.SG 83-75 PVC artificial leather
31.HG2-821-75 pearlescent plexiglass plate
32.SG124-77 pearlescent plexiglass button
33.SG125-77 plastic button
34.JB1256-77 6121 polyester film. Fluoroethylene rod
37.SG189-81 PTFE pipe
38.SG191-81 PTFE plate
39.SG212-81 rigid PVC foam plate
41.SG213-81 polypropylene textile bag
41.SG214-81 concrete sleeper. 81 high-pressure polyethylene heavy packaging bag (film)
44.SG232-81 polystyrene foam sheet
45.SG233-81 polystyrene foam packaging material
46.SG234-81 plastic strap
47.SG243-81 black low-density polyethylene cable sheath material
48. -81 soft PVC extruded sheet
51.SG246-81 polypropylene pipe
51.SG252-82 soft polyurethane foam
52.SG259-82 polyethylene blow-molding barrel
53.SG261-82 PVC sintered microporous separator for storage battery
54. SG274.5111111111111 Pump
56.SG281-83 polypropylene strapping LDPE
57.SG311-83 soft PVC printed film
58.SG81-84 soft PVC blown film
59.SG354-84 polypropylene blown film
61.SG369-84 polyethylene Shoes
62.SG387-84 Acrylonitrile-Butadiene-Styrene (ABS) Plastic Extruded Sheet
63. GB 6674-86 Low Density Polyethylene Pipe for Sprinkler Irrigation
64. GB 6981-86 Calcium Plastic Corrugated Box
65. GB 7134-86 Casting Industrial Plexiglass Sheet. Bar and pipe
66.gb7135-86 casting pearlescent plexiglass plate
67.gb8673-88 Technical requirements for storage, transportation and packaging of fresh eggs
68.gb8674-88 Transportation, storage and management of storage, transportation and packaging of fresh eggs
69.gb8814-88 doors, Rigid PVC profiles for window frames
71.gb8815-88 soft PVC plastics for wires and cables
71.gb8868-88 vegetable plastic turnover box
72.gb8945-88 PVC wallpaper
73.gb8946-88 plastic woven bag
74. Vinyl artificial leather
76.gb8949-88 polyurethane artificial leather
77.gb9681-88 Hygienic standard for PVC molded products for food packaging
78.gb9683-88 Hygienic standard for composite food packaging bags
79.gb9685-88 food containers, Hygienic standard for the use of additives for packaging materials
81.gb9686-88 Hygienic standard for polyamide epoxy resin coating on the inner wall of food containers (instead of gbn45-84)
81.gb9687-88 Hygienic standard for polyethylene molded products for food packaging (instead of gbn84-81)
82.gb9688-88 Polypropylene molded products for food packaging. . GB 9689-88 Hygienic standard for polystyrene molding for food packaging (instead of GBN 86-81)
84. GB 9691-88 Hygienic standard for melamine molding for food packaging (instead of GBN 87-81)
85. GB 9691-88 Hygienic standard for polyethylene resin for food packaging (instead of GBN 88-81). Because plastic is a polymer compound, it is usually difficult for the environment to decompose, and it will inevitably affect the environment under the current conditions. With the gradual improvement of people's environmental awareness, I believe this problem will be solved step by step.
Advantages and disadvantages of using plastics
1. The advantage is convenience, and the disadvantage is white pollution. But now there are degradable plastic bags. I don't know what the epidemic situation is and whether the degradation effect is good or not.
2. Most plastic bags sold in the market are made of PVC. This chemical will release toxic substances when it meets high temperature, which will be harmful to health with meals.
3. There are more and more plastic bags, so the disposal of plastic waste has become a thorny issue. Even if plastic bags are burned, they will produce a carcinogen "dioxin", which is suspended in the air for a long time, and it is extremely difficult to be discharged with the air. When the "dioxin" in the body reaches a certain level, it will cause a series of diseases such as abnormal delivery and male feminization.
At present, the main way to deal with garbage is to fill it in the ditch.
However, this method is only scratch the itch for it, because it is difficult to be decomposed in soil, and it will produce harmful substance hydrogen chloride under the influence of heat and radiation, polluting soil and groundwater.
With the continuous development of society, many things have brought convenience to people, but they have also caused some side effects. Nowadays, people like to carry their things in a plastic bag when they go out, which is very convenient and chic to use.
In the past, there were no plastic bags. People used their own bags to sell things. They always put them away, washed them and used them again.
The development of society has brought people beautiful and convenient plastic bags, which are very popular with people.
But with the development of society, people have a new view on plastic bags.
This kind of cheap plastic bags that can be seen everywhere is no longer popular with people. People tend to like the new and hate the old. After they use them, they just throw them around. You can see plastic bags flying all over the sky in the streets.
After a long time, these plastic bags turn into white garbage, which brings benefits to people, but also pollutes the environment due to people's unreasonable use.
people's irrationality does great harm to the environment.
We should collect the used plastic bags and eliminate them, so as not to affect our homes. Be a civilized and good citizen.
resources
Baidu encyclopedia-plastic products