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A special reinforcement, toughening and anti-permeability masterbatch for ultra-thin fully biodegradable mulch

A technology for degrading plastic film and strengthening and toughening, applied in the field of agricultural materials, can solve the problems of decreased tensile strength and tear strength, early cracking of plastic film, and high cost of plastic film, so as to maintain smoothness and ensure mechanical properties. And use stability, solve the effect of poor mechanical strength

Active Publication Date: 2019-11-05
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN 103589124B discloses a fully biodegradable PLA / PBAT composite mulch film and its preparation method; patent CN 104744898A discloses a fully biodegradable mulch film and its preparation method. Polyester (PPC), polybutylene adipate / terephthalate (PBAT) and heat stabilizer, but the thickness of these mulch films is generally high, 6um-50um, the cost of the mulch film remains high, and the light transmittance is poor. The strength is low, so it cannot be commercialized in the short term; different from the difficult-to-degrade polyolefin film, for the fully biodegradable film, as long as the processing is convenient and the performance is excellent, the thinner the film product, the better. We are also committed to solving the above problems. In 2013, we applied for a patent 201310749460.X for a fully biodegradable mulch masterbatch and its preparation method and application. However, we found that the masterbatch is used for blowing ultra-thin fully biodegradable film in practical applications. When using mulch, it is difficult to open the film bubble during the processing of the ultra-thin mulch film below 6 μm, the tensile strength and tear strength are greatly reduced, and the haze is large. Mulch film is prone to cracking in advance, so this technology has certain defects, and how to overcome this defect and provide a more balanced performance of mulch masterbatch has become a problem that we need to solve

Method used

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  • A special reinforcement, toughening and anti-permeability masterbatch for ultra-thin fully biodegradable mulch
  • A special reinforcement, toughening and anti-permeability masterbatch for ultra-thin fully biodegradable mulch
  • A special reinforcement, toughening and anti-permeability masterbatch for ultra-thin fully biodegradable mulch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Reinforcing, toughening and anti-reflection masterbatch for ultra-thin fully biodegradable mulch film, in parts by weight, includes the following components:

[0023]

[0024] Prepared according to the following steps:

[0025] Dissolve and disperse hydrophobic nano-silica and epoxy soybean oil in carbon tetrachloride, stir evenly, distill off carbon tetrachloride to obtain mixture 1; then mix mixture 1, polyadipic acid / terephthalic acid Butylene glycol ester, polylactic acid, ultraviolet absorber Tinuvin 234, and polymer microspheres PMMA are sequentially put into a high-speed mixer for stirring at 700-1000 r / min, and mixed for 10-30 minutes to obtain a mixture 2; the mixture 2 is put into a twin-screw extruder, Extruded at 135-160°C, air-cooled and granulated to obtain reinforced, toughened, and anti-reflective masterbatches for ultra-thin fully biodegradable mulch films.

Embodiment 2

[0027] Reinforcing, toughening and anti-reflection masterbatch for ultra-thin fully biodegradable mulch film, in parts by weight, includes the following components:

[0028]

[0029] Prepared according to the following steps:

[0030] Dissolve and disperse hydrophobic nano-silica and silicone diffusion oil in carbon tetrachloride, stir evenly, distill off carbon tetrachloride to obtain mixture 1; Diester, polylactic acid, AICA CE-AZ01, UV absorber Tinuvin 234, UV stabilizer Put 5050H and silica microspheres into a high-speed mixer in turn at 700-1000r / min to stir and knead for 10-30 minutes to obtain mixture 2; put mixture 2 into a twin-screw extruder, extrude at 135-160°C, and air-cool granulate , to obtain the special reinforced, toughened and anti-permeable masterbatch for ultra-thin fully biodegradable mulch film.

Embodiment 3

[0032] Reinforcing, toughening and anti-reflection masterbatch for ultra-thin fully biodegradable mulch film, in terms of weight percentage, includes the following components:

[0033]

[0034] Prepared according to the following steps:

[0035] Dissolve and disperse hydrophobic nano-silica and silicone diffusion oil in carbon tetrachloride, stir evenly, distill off carbon tetrachloride to obtain mixture 1; Diesters, UV Stabilizers 5050H, Akema AX-8900, and silica microspheres were sequentially put into a high-speed mixer at 700-1000r / min and stirred and mixed for 10-30 minutes to obtain mixture 2; mixture 2 was put into a twin-screw extruder, Extrusion and air-cooling granulation to obtain the reinforced, toughened and anti-permeable masterbatch for ultra-thin fully biodegradable mulch film.

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Abstract

The invention belongs to the field of biodegradable polymer materials, and in particular relates to a special reinforced, toughened and anti-permeable masterbatch for ultra-thin fully biodegradable mulch. The masterbatch is mainly composed of polyadipate / butylene terephthalate, polylactic acid It is prepared with strengthening, toughening, anti-permeability and stability additives. The preparation method is simple and easy to operate. The obtained special masterbatch can be completely degraded and has good dispersibility. Adding an appropriate amount of the masterbatch can blow the ultra-thin biological material below 6μm. Degradable mulch film, the film is easy to open during the ultra-thin mulch film blowing process, the processing stability and processing efficiency are improved, the mechanical properties of the processed mulch film are enhanced, the light transmittance of the mulch film is improved, the haze is reduced, and the weather resistance of the mulch film is significantly improved at the same time; The masterbatch combines multiple functions such as reinforcement, toughening, anti-reflection, and lubrication. It is easy to use, improves the processing performance of ultra-thin fully biodegradable mulch, and reduces the cost of using fully biodegradable mulch.

Description

technical field [0001] The invention belongs to the field of agricultural materials, and in particular relates to a plastic masterbatch, in particular to a special reinforcement, toughening and anti-permeability masterbatch for ultra-thin fully biodegradable plastic film. Background technique [0002] Plastic mulches play a huge role in agricultural production. However, most of the plastic mulches currently used are polyolefin mulches that are difficult to degrade in a short period of time or incompletely degradable polyolefin mulches that have been added with starch and photodegradants. The use of these mulch materials has caused "white pollution" of the environment and brought safety hazards to the sustainable development of human beings. Fully biodegradable mulch is made of completely biodegradable plastics through blow molding or tape casting. It can be completely decomposed by microorganisms. The final products of its degradation are carbon dioxide and water, which can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L67/04C08L33/12C08L91/00C08K3/36C08K7/18C08J3/205C08J3/22A01G13/02
CPCA01G13/0275C08J3/2053C08J3/226C08J5/18C08J2367/02C08J2467/02C08K2201/003C08K2201/011C08L67/02C08L2201/06C08L2201/10C08L2203/16C08L2205/035C08L2205/18C08L67/04C08L33/12C08L91/00C08K3/36C08K7/18Y02A40/28
Inventor 张坤米庆华徐静韩宾
Owner SHANDONG AGRICULTURAL UNIVERSITY