Thermal-insulation and degradable mulching film composition and preparation method thereof

A technology for degrading mulch films and compositions, applied in botany equipment and methods, plant protection, plant protection covers, etc., can solve the problems of high film brittleness, difficulty in blowing film, low tear strength, etc., and achieve good heat preservation and temperature increase performance , It is not easy to dissipate heat, and it is beneficial to the effect of heating

Inactive Publication Date: 2018-04-06
山东天野生物降解新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the stages of development, the existing biodegradable polymer materials have certain deficiencies. For example, polypropylene carbonate resin is relatively cheap, but its melt strength is low, which makes it difficult to blow the film, and the film prepared by biaxial stretching High brittleness and low tear strength; other films such as polyhydroxyalkanoate (PHA, PHB, PHBV), aliphatic polycarbonate (APC), polyvinyl alcohol (PVA), etc. have poor mechanical properties, etc. problems, and the traditional biodegradable film mulch has the following problems: due to the heating e

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0045] The preparation method of embodiment, comparative example is as follows:

[0046] (1) Mix strontium carbonate and flake functional masterbatch to make thermal insulation and warming additive;

[0047] (2) Dry PPC and PBAT in an oven at 80°C for 4 hours, take them out, and set aside;

[0048] (3) Add PPC, PBAT, thermal insulation and warming additives and other raw materials into the mixer and stir at high speed for 5 minutes, then release the materials;

[0049] (4) Put the mixed materials into the twin-screw extruder to extrude and granulate. The temperature of the twin-screw extruder is 150°C~170°C, the feeding frequency is 20 Hz~25Hz, and the speed of the main machine is 130r / min , and finally cooled and pelletized to obtain the composition; the composition is blown into a film under the condition of 170-195° C., and the film thickness is 8 μm.

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Abstract

Thermal-insulation and degradable mulching film composition is prepared from components in parts by mass as follows: 100 parts of PPC (polypropylene carbonate resin), 50-70 parts of PBAT (polybutyleneadipate terephthalate), 30-50 parts of toughening-modified resin, 2-5 parts of a temperature keeping and increasing additive and 0.1-1.0 part of a nucleating agent. A mulching film melt prepared fromthe mulching film composition is high in strength, excellent in mechanical property, good in temperature keeping and increasing performance and suitable for areas with large day and night temperaturedifference.

Description

technical field [0001] The invention belongs to the technical field of ground covering films, and in particular relates to a thermal insulation and degradation film composition and a preparation method thereof. Background technique [0002] The use of agricultural ground covering film (hereinafter referred to as mulch film) in a low temperature environment can improve the survival rate of crops, and play a role in accelerating the ripening and increasing production of crops, so it is widely used; the prior art usually uses polymer Ethylene blow molding is used to prepare mulch, and polyethylene raw materials are derived from non-renewable resources such as the petrochemical industry. With the increasing shortage of petrochemical resources, the long-term supply of mulch raw materials has brought crisis, and the cost is also increasing; moreover, polyethylene mulch It is non-degradable or takes a long time to degrade slowly after use, and usually it will bring white pollutio...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/02C08L67/04C08K13/04C08K7/00C08K3/26C08K3/34C08K5/134C08K3/36A01G13/02
CPCA01G13/0275C08J5/18C08J2369/00C08J2467/02C08J2467/04C08K3/34C08K3/36C08K5/1345C08K7/00C08K13/04C08K2003/265
Inventor 付宇经宣兆志阎宝林李开磊张鑫科
Owner 山东天野生物降解新材料科技有限公司
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