Plant fiber-based biodegradable tableware and preparation method thereof

[0029] The present invention also provides a preparation method of plant fiber-based biodegradable tableware, comprising the following steps:

[0030] Step 1. Pulverize and mix thermoplastic starch and auxiliary to obtain powdery thermal adhesive;

[0031] Step 2, mixing the powdered thermal adhesive prepared in step 1 with short fibers to obtain a short fiber mixture;

[0032] Step 3, mixing the long fibers with the short fiber mixture prepared in step 2 to obtain a fiber blend;

[0033] Step 4: Compressing the fiber blend prepared in Step 3 to obtain biodegradable tableware.

[0034] In the present invention, the pulverization time in the step 1 is 2-40 min, preferably 20 min.

[0035] In the present invention, the mixing in the step 2 is heating, stirring and mixing;

[0036] Wherein, the mixing speed is 50-1200r / min, preferably 100-800r / min, more preferably 500r / min; the mixing time is 2-60min, preferably 10-40min, more preferably 30min; the mixing temperature is 30-18...

[0042] Add 10 parts of modified potato starch and 10 parts of polyethylene adipate to the pulverizer, and pulverize at a high speed for 15 minutes to obtain a powdery thermal adhesive, and then mix the powdered thermal adhesive with 10 parts of bamboo short fibers. (The length is 0.8mm, the diameter is 0.5mm), add it to the mixer, mix for 30min at a temperature of 120°C and a rotation speed of 1000r / min to obtain a primary mixed material, and continue to add 70 parts of coconut husk long fibers (30mm in length, 30mm in diameter) 0.5mm), mix for 20min at a temperature of 110°C and a rotation speed of 200r / min to obtain the final mixture. The final mixture was added to the tableware-shaped model, and the temperature of the mold was 200° C. and the pressure in the mold was 20 MPa, and hot-pressed for 1 min to prepare the plant fiber-based biodegradable tableware.

[0044] 10 parts of modified potato starch and 10 parts of polylactic acid were added to the pulverizer, and pulverized at a high speed for 15min to obtain a powdered thermal adhesive, and then the powdered thermal adhesive was mixed with 20 parts of bamboo short fibers (length: 0.8mm, The diameter of 0.5mm) was added to the mixer, and mixed for 30 minutes at a temperature of 120 ° C and a speed of 1000 r / min to obtain a primary mixed material, continued to add 60 parts of sugarcane long fibers, and mixed at a temperature of 110 ° C and a speed of 200 r / min for 20 minutes , to obtain the final mixture. The final mixture was added to the tableware-shaped model, and the temperature of the mold was 200° C. and the pressure in the mold was 20 MPa, and hot-pressed for 1 min to prepare the plant fiber-based biodegradable tableware.