Quality requirements of ethyl acetate in boiled bags of Dongguan Beite packaging materials Co., Ltd
According to GB / T 3728-91, the moisture content of excellent products is less than 1000ppm, that of first-class products is less than 2000ppm, and that of qualified products is less than 4000ppm.
The moisture and alcohols in ethyl acetate (not only ethanol, methanol and isopropanol content should also be controlled) will react with the curing agent in the glue, which will consume the curing agent and cause the adhesive layer not to dry, which is one of the main reasons for the wrinkle of the adhesive layer of the boiling bag.
Expanding knowledge: which is more environmentally friendly, paper bag or plastic bag
To consider whether an item is environmentally friendly or not, we should not only consider whether it will degrade after you use it or not. In fact, from the moment a product starts to be produced, every step of its life journey bears an impact on the environment until the product is disposed of as a waste disposal place.
Therefore, the analysis of the impact of an article on the environment should start from its production until it is completely cleaned up. This process is now called "product life cycle analysis.". So if we compare paper bags and plastic bags in a comprehensive way, the answer is not as clear as before when we only consider that plastic bags are more difficult to degrade than paper bags. Of course, the raw material of paper bags is paper. Modern papermaking of Dongguan Beite packaging materials Co., Ltd. may come from trees or recycled paper products after recycling. If the pulp is used, of course, trees need to be cut down. This environmental impact needs to be added to the paper bag, so it is not so innocent.
If recycled paper is used, of course, there is less crime of tree cutting. However, in the process of waste paper recycling, cleaning, deinking and re pulping, a lot of dust and sewage will be produced, and more energy will be consumed. Moreover, because of the short fiber and poor load-bearing capacity of recycled paper, there are less paper bags made of recycled paper in China, and more of them are made into printing paper. That is to say, most of the paper bags you use are made of original pulp.
The raw material for the production of plastic bags is ethylene fractionated from petroleum. The polymerization process of ethylene is a very mature process. If Dongguan Beite packaging materials Co., Ltd. only from the perspective of energy consumption and pollution in this production process, the production of polyethylene plastic bags is environmentally friendly and more economical than that of paper bags. However, the bigger problem of plastic bags is that they can not be degraded even if they are buried in the ground for hundreds of years. In most places where garbage management is neglected in our country, they will fly all over the sky, which makes people have a more intuitive understanding of environmental pollution.
Comprehensive analysis of the production process and after use of disposal, plastic bags or paper bags on the environment are not small, not to say that using paper bags is a symbol of environmental protection and fashion. What is environmental protection? Let's get rid of these formal slogans. If you use plastic bags or paper bags, try to use them several times. It's not in vain for them to come to this prosperous life. Or, it's better to use cloth bags. After all, it's not a problem to use cloth bags for hundreds of times. If they are dirty and washed, they can also write and paint on them and make something with personality. It's fashionable. Even if cloth bags have environmental costs, they can earn enough money by using them hundreds of times. www.dgbpk.com/
Dongguan Beite packaging materials Co., Ltd
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