Environmentally-friendly packaging material and preparation method thereof
A packaging material and environmental protection technology, applied in the field of environmental protection packaging materials and preparation, can solve the problems of plastic packaging bags not easily degraded, affecting the living environment, white pollution, etc., and achieve the effects of protecting the natural ecological environment, improving economic benefits, and reducing white pollution.
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[0040] Preferably, the preparation method of the food packaging bag melt comprises the following steps:
[0041] Step (1): Cleaning, soaking the food packaging bag in hot water at 40-60°C for 1-2 hours;
[0042] Step (2): Dehydration, dehydration of the water-containing food packaging bags by centrifugal filtration dehydration method;
[0043] Step (3): Drying, just dry the food packaging bag with a hot air dryer;
[0044] Step (3): mastication, the dried food packaging bags are put into a mastication machine for mastication, and the temperature is controlled at 240-260°C.
[0045] Preferably, the polyurethane rigid foam pretreatment method is: melting the polyurethane rigid foam at 60-80° C. to obtain molten polyurethane rigid foam.
[0046] One aspect of the present invention provides a method for preparing an environmentally friendly packaging material. The method for preparing the environmentally friendly packaging material is as follows:
[0047] Step (1): Weigh 18-25 ...
Embodiment 1
[0051] An environmentally friendly packaging material provided in this embodiment, the environmentally friendly packaging material includes the following raw materials in parts by weight: 25 parts of polyurethane rigid foam, 27 parts of food packaging bag melt, 9 parts of plasticizer, and 1 part of adhesive , 17 parts of water hyacinth and 3 parts of sodium methyl silicate.
[0052] Described plasticizer is glycerol.
[0053] The adhesive is gelatin.
[0054] Described water hyacinth lotus processing method comprises the steps:
[0055] Step (1): Soak water hyacinth branch and leaves for 50 minutes;
[0056] Step (2): Use a pulverizer to crush for 2 minutes at a speed of 400 r / s;
[0057] Step (3): Pass through an 80-mesh sieve after crushing.
[0058] The preparation method of the food packaging bag melt comprises the following steps:
[0059] Step (1): Cleaning, soaking the food packaging bag in hot water at 40°C for 2 hours;
[0060] Step (2): Dehydration, dehydration...
Embodiment 2
[0069] An environmentally friendly packaging material provided in this embodiment, the environmentally friendly packaging material includes the following raw materials in parts by weight: 18 parts of polyurethane rigid foam, 32 parts of food packaging bag melt, 3 parts of plasticizer, and 9 parts of adhesive , 8 parts of water hyacinth and 7 parts of sodium methyl silicate.
[0070] Described plasticizer is glycerol.
[0071] The adhesive is gelatin.
[0072] Described water hyacinth lotus processing method comprises the steps:
[0073] Step (1): Soak water hyacinth branch and leaves for 40 minutes;
[0074] Step (2): Use a pulverizer to crush at a speed of 450 r / s for 2 min;
[0075] Step (3): Pass through a 60-mesh sieve after crushing.
[0076] The preparation method of the food packaging bag melt comprises the following steps:
[0077] Step (1): Cleaning, soaking the food packaging bag in hot water at 60°C for 1 hour;
[0078] Step (2): Dehydration, dehydration of th...
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