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Biodegradable thermoplastic PVA/starch seed tape and preparation method thereof

A thermoplastic starch, biodegradable technology, applied in the field of agricultural film, can solve the problems of difficult industrialization, low planting precision, difficult seed dosage, etc.

Active Publication Date: 2021-05-18
NEW NAVIGATOR PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional vegetables (such as peppers, lettuces, radishes), saplings, and flowers are mostly sown by manual sowing or simple seeder sowing. Both methods are difficult to accurately control the amount of seeds. While a lot of seeds are wasted, a lot of seeds are needed in the later stage. Artificial "thinning" of plants, pulling out excess crops or growing seedlings first and then transplanting
This double waste has resulted in high planting costs for farmers, making it difficult to industrialize, and the consistency of agricultural products is poor, planting accuracy is low, and product competitiveness is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] In some preferred embodiments, the preparation method of the thermoplastic PVA comprises the following steps: (1) adding glycerol to the PVA, and mixing with a heat stabilizer, a lubricant and a crosslinking agent and adding it to a high-speed mixer for high-speed kneading (2) Putting the raw materials in the step (1) into a twin-screw extruder to extrude and granulate, and obtain thermoplastic PVA after the granulation is completed.

[0032] In some preferred embodiments, the temperature of the high-speed mixer is 110-120°C; the temperature of the twin-screw extruder is 110-190°C.

[0033] In some preferred embodiments, the thermoplastic starch raw material includes the following parts by weight: 90-110 parts of starch, 30-35 parts of glycerol, 6-10 parts of crosslinking agent, 2-3 parts of heat stabilizer, lubricating 0.01 to 0.06 parts of the agent.

[0034] In some preferred embodiments, the preparation method of the thermoplastic starch comprises the following ste...

Embodiment 1

[0047] Embodiment 1 The first aspect provides a biodegradable thermoplastic PVA / starch seed belt, the raw materials include the following parts by weight: 70 parts of thermoplastic PVA, 30 parts of thermoplastic starch.

[0048] In this example, thermoplastic PVA is self-made, and the steps include the following steps: (1) Add 12 parts of glycerol to 100 parts of PVA (PVA-0588 and PVA-1788, weight ratio 2:3), and mix with 3 parts of hard Calcium fatty acid, 0.6 part of stearic acid and 0.01 part of potassium chloride are mixed and added in a high-speed mixer for high-speed kneading, and the stirring temperature is 120 ° C; (2) the raw materials in the step (1) are put into a twin-screw extruder and extruded After granulation, the temperature of the twin-screw extruder is 190° C. After the granulation is completed, thermoplastic PVA is obtained.

[0049] In this example, thermoplastic starch is self-made, and the steps include the following steps: (1) Add 33 parts of glycerol t...

Embodiment 2

[0054] The specific implementation method of this example is the same as that of Example 1, except that the thermoplastic PVA is 60 parts, and the thermoplastic starch is 40 parts.

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PUM

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Abstract

The invention discloses a biodegradable thermoplastic PVA / starch seed tape. The biodegradable thermoplastic PVA / starch seed tape comprises the following components: thermoplastic PVA and thermoplastic starch. Biodegradable thermoplastic PVA / starch seed tapes with different degradation times can be prepared according to the ratio of thermoplastic PVA to thermoplastic starch. The prepared thermoplastic PVA / starch seed tape has good biodegradability and excellent seedling survival rate, is suitable for popularization in the field of agricultural films, and has wide development prospects.

Description

technical field [0001] The invention relates to the technical field of agricultural films, in particular to a biodegradable thermoplastic PVA / starch seed tape and a preparation method thereof. Background technique [0002] Traditional vegetables (such as peppers, lettuces, radishes), saplings, and flowers are mostly sown by manual sowing or simple seeder sowing. Both methods are difficult to accurately control the amount of seeds. While a lot of seeds are wasted, a lot of seeds are needed in the later stage. The artificial "thinning" of the crops, pull out the excess crops or first raise the seedlings and then transplant them. This double waste has resulted in high planting costs for farmers, difficulty in industrialization, poor consistency of agricultural products, low planting accuracy, and low product competitiveness. [0003] At present, the "seed belt" process can well solve the problem of "poor precision" in the agricultural planting process. The so-called seed tape...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L3/02
CPCC08L29/04C08L2201/06C08L2205/025C08L3/02
Inventor 李颖熙
Owner NEW NAVIGATOR PLASTICS
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