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Degradable mulching film containing plant fiber degradable filler

A technology for degrading mulch and plant fibers, which is applied in the field of ground covering film manufacturing, can solve the problems of reduced transparency, poor compatibility, and unsatisfactory effects, and achieve the effect of avoiding pollution

Inactive Publication Date: 2017-07-14
BEIJING SUNSHINE SPECTACLE ECOLOGICAL SCI&TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the preparation of degradable mulch often adopts, wood department starch and chitin as filling degradation agents for degrading mulch, due to various types of starch [C 6 h 7 o 2 -(OH) 2 ]n contains a large number of hydroxyl groups (-OH) and has poor compatibility with polyethylene polymers and is very easy to absorb water. Therefore, it is difficult to disperse in polyolefins. It is necessary to add coupling agents to modify starch. Not only is the process cumbersome, High cost and unsatisfactory effect, reduced transparency
Therefore, it has been stuck in the confusion of being unable to implement and promote for many years

Method used

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  • Degradable mulching film containing plant fiber degradable filler
  • Degradable mulching film containing plant fiber degradable filler
  • Degradable mulching film containing plant fiber degradable filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The polymer materials used to make mulch include high-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), ethylene-vinyl acetate copolymer (EVA), polyvinyl chloride (PVC), etc. In this example, polyvinyl chloride (PVC) is used to prepare the degradable mulch film. The PVC-based mulch film has softness, high transparency, air permeability (O2, CO2), suitable heat preservation, anti-fog, dust-proof, comfortable hand feeling and extension moderate advantages. At the same time, PVC resin is the most degradable polymer material among many polymers. The suspension method GS-3 resin is selected. The GS-3 resin is white powder with suitable molecular weight and good compatibility with plasticizers and stabilizers. At the same time, the raw material The source is abundant and the price is low. The particle size is 75-250um, and it is a multi-level structure model.

[0031] After adding a photodegradant, PVC macromolecules will undergo a series of complex photo...

Embodiment 2

[0070] In the natural environment, under the action of natural light, oxygen and various microorganisms, polyethylene (LDPE), linear high-density polyethylene (LLDPE), and polymer chains are broken into small molecules, and pulverized fragments appear on the appearance Brittle cracks and mechanical properties (tensile strength, elongation at break, right-angle tear strength) are significantly reduced, and even completely degraded into carbon dioxide and water and disappear, and will not cause white pollution to the soil and the environment. In order to maintain the best application effect of the mulch. This embodiment adopts the main resin formulations of three kinds of polyolefins: high-density polyethylene (LDPE), linear high-density polyethylene (LLDPE) and metallocene polyethylene (m-PE), wherein

[0071] Polyethylene LDPE: grade 2420MI=2, density d=0.921;

[0072] Linear low-density polyethylene (LLDPE): grade 7042MI = 1-2 density d = 0.918;

[0073] Metallocene polyeth...

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Abstract

The invention belongs to the technical field of manufacturing ground mulching films and particularly relates to a degradable mulching film containing plant fiber degradable filler. The degradable mulching film includes: resin as a mulching film substrate, a degradable master batch that promotes degradation of the mulching film, degradable filler that contains natural plant fiber powders, an antifogging agent, and an additive. The resin is polyvinyl chloride (PVC) or is mixed resin composed of polyethylene (LDPE), linear low density polyethylene (LLDPE) and metallocene polyethylene (mPE). In manufacturing of the degradable mulching film, by means of the plant celluloses such as straw powder, rice hull powder, cottonseed powder and the like, conditions for reproduction of microorganisms in soil are created, thus achieving the objects of turning waste into resources by straw returning. These natural plant fibers have the effect of promoting degradation of the mulching film.

Description

technical field [0001] The invention mainly belongs to the technical field of ground covering film manufacture, and in particular relates to a degradable ground film containing plant fiber degradable filler. Background technique [0002] Ground-covering film agriculture technology has become a new cultivation technology developed in my country in the 1970s. The ground covering film agricultural technology is to cover the transparent and colored (black, white, green) film with a thickness of 0.01‐0.02mm on the surface of the ground for cultivation. It is the most simple and feasible form of protected land. Temperature, promote root development, thereby increasing crop yield and output value. In addition, plastic film mulching also has effective functions such as water conservation, water saving, weeding, promotion of organic fertilizer decomposition, and keeping soil loose (preventing soil compaction). [0003] The traditional plastic film has the characteristics of high str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L97/02C08L23/06C08L23/08C08L67/02C08K13/02C08K5/098C08K5/11C08K5/20C08K5/10
CPCC08L27/06C08J5/18C08J2323/06C08J2327/06C08J2497/02C08K2201/014C08L23/06C08L2201/06C08L2203/16C08L2205/02C08L2205/025C08L2205/035C08L2205/16C08L2207/066C08L97/02C08K13/02C08K5/098C08K5/11C08K5/20C08L23/0815C08L67/02C08K5/10
Inventor 张维民梁芳新张建华蔡典雄张敬锁牛木森董文光梁伟群刘中志
Owner BEIJING SUNSHINE SPECTACLE ECOLOGICAL SCI&TECH
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