Stretch-proof and easily-degradable plastic bag and preparation method thereof

[0052] Example 1

[0053] A stretch-resistant and easily degradable plastic bag, the preparation method of which comprises the following steps:

[0054] S1: pulverize the kraft paper to 60-80 mesh to obtain kraft paper powder;

[0055] S2: Ball milling of polyvinyl alcohol, starch, photodegradation agent, kraft paper powder and citric acid ester, the ball milling speed is 240rad / min, and the ball milling time is 1.5h to obtain the spare material; Pentadiene iron, citrate is tributyl citrate;

[0056] S3: send the spare material into the film blowing machine, the temperature of the material barrel of the film blowing machine is controlled at 165 °C, the temperature of the die mouth is controlled at 180 °C, and the inflation ratio is 2 to obtain a plastic film;

[0057] S4: Slitting and sealing the plastic film to obtain a stretch-resistant and easily degradable plastic bag;

[0058] Wherein, the specific addition amount of each raw material in this example refers to Example 1

[0059] Example 2

[0060] A stretch-resistant and easily degradable plastic bag, the preparation method of which comprises the following steps:

[0061] S1: pulverize the kraft paper to 60-80 mesh to obtain kraft paper powder;

[0062] S2: Ball milling of polyvinyl alcohol, starch, photodegradation agent, kraft paper powder and citric acid ester, the ball milling speed is 260rad / min, and the ball milling time is 1.2h, to obtain the spare material; in this embodiment, the photodegradation agent adopts a bicyclic Pentadiene iron, citrate is tributyl citrate;

[0063] S3: send the spare material into the film blowing machine, the temperature of the barrel of the film blowing machine is controlled at 160 °C, the temperature of the die mouth is controlled at 175 °C, and the inflation ratio is 2.5 to obtain a plastic film;

[0064] S4: Slitting and sealing the plastic film to obtain a stretch-resistant and easily degradable plastic bag;

[0065] Wherein, the specific addition amou

[0066] Example 3

[0067] A stretch-resistant and easily degradable plastic bag, the preparation method of which comprises the following steps:

[0068] S1: pulverize the kraft paper to 60-80 mesh to obtain kraft paper powder;

[0069] S2: Ball milling of polyvinyl alcohol, starch, photodegradation agent, kraft paper powder and citric acid ester, the ball milling speed is 280rad / min, and the ball milling time is 1h, to obtain the standby material; in this embodiment, the photodegradation agent adopts dicyclopentane Diene iron, citrate is tributyl citrate;

[0070] S3: send the spare material into the film blowing machine, the temperature of the material barrel of the film blowing machine is controlled at 155°C, the temperature of the die mouth is controlled at 170°C, and the inflation ratio is 3 to obtain a plastic film;

[0071] S4: Slitting and sealing the plastic film to obtain a stretch-resistant and easily degradable plastic bag;

[0072] Wherein, the specific addition