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Efficient controllable photooxidation-biodegradable plastic film and preparation method thereof

A plastic film and biodegradation technology, applied in the field of high-efficiency controllable photooxidation-biodegradable plastic film and its preparation, can solve the problems of uncontrollable degradation, incomplete degradation, complicated process, etc., and achieve the promotion of photocatalytic degradation and degradation efficiency The effect of improving and increasing the degree of degradation

Active Publication Date: 2014-06-04
汕头保税区联通工业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, there are many technical problems that need to be solved urgently. For example, bio-based materials are directly blended with plastics to prepare films, which has high cost, incomplete degradation, and uncontrollable degradation; the use of multi-layer composite films to prepare degradable plastic films is complicated. Mismatch between layers, resulting in incomplete recombination and incomplete degradation
Most of the existing technologies achieve a high degradation rate by adding a large amount of biomass materials, but the mechanical properties of the film cannot be guaranteed, and the remaining plastics are difficult to continue to degrade, and undegraded fragments will still cause environmental pollution

Method used

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  • Efficient controllable photooxidation-biodegradable plastic film and preparation method thereof
  • Efficient controllable photooxidation-biodegradable plastic film and preparation method thereof
  • Efficient controllable photooxidation-biodegradable plastic film and preparation method thereof

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preparation example Construction

[0039] (2) The preparation method of each embodiment and comparative example plastic film is as follows:

[0040] According to the weighing principle of each embodiment or comparative example in Table 1, mix in a high-speed mixer and set aside. Extruder conditions: zone 1 100-120°C, zone 2 120-140°C, zone 3 140-160°C, zone 4 160-180°C, zone 5 165-185°C, head 165-185°C. After the temperature reaches a stable level, put the mixed raw materials into the feeding hopper, adjust the speed of the main machine and the feeder, melt and extrude the raw materials, pass through water, blow dry, cut into master batches, and then dry the master batches for use. Then set the temperature of the film blowing machine: the first zone is 100-110°C, the second zone is 125-135°C, the third zone is 145-155°C, and the die head is 145-155°C. After the temperature has stabilized, turn on the switch of the host machine, adjust the speed, add masterbatch, extrude and blown into a film, and the thickness...

Embodiment 6

[0050] Embodiments 6-9 add different contents of nano-TiO 2 Efficient and controllable photooxidation-biodegradable plastic film, under light photooxidation-biodegradable plastic film all appeared induction period, embodiment 6 nanometer TiO 2 The content is the least, and the induction period is up to 250 hours, due to the nano-TiO 2 As the content increases, the degradation rate increases, and the corresponding induction period is shortened to 180 hours as in Example 9, the induction period does not disappear, and the degradation of the plastic film remains controllable. Degradation test results also showed that nano-TiO 2 When the content is low, increase TiO 2 content, the degradation effect is obvious, when it is greater than 3%, increase the TiO 2 content, the degradation effect is not obvious.

[0051] 4. Efficient and controllable photooxidation-biodegradable plastic films of Examples 10-13 with different types of hydrophilic modifiers added

[0052] Examples 10-1...

Embodiment 29～32

[0059] 8. Typical high-efficiency controllable photooxidation-biodegradable plastic films of Examples 29-32

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Abstract

The invention discloses an efficient controllable photooxidation-biodegradable plastic film and a preparation method thereof. The plastic film comprises the following components in percentage by weight: 88-99% of polymer base material, 0.5-5% of hydrophilic modifier, 0.5-5% of nano titanium dioxide and 0.1-2% of light stabilizer. The preparation method disclosed by the invention comprises the steps of: melt blending and extrusion blow molding. The plastic film disclosed by the invention has the characteristics of high hydrophilcity, high degradation efficiency, high photocatalytic activity, wide light absorption range, short degradation time, controllable stable period, wide application range, simple production process, easiness for obtaining raw materials and the like, is suitable for the fields such as packages, agricultural films, plastic bags and the like, and can be degraded in a natural environment after being abandoned.

Description

technical field [0001] The invention belongs to the technical field of degradable plastic films, and in particular relates to a high-efficiency controllable photooxidation-biodegradable plastic film and a preparation method thereof. Background technique [0002] The amount of plastic film is very large, and it is widely used in disposable products such as packaging materials and agricultural mulch films. However, it is difficult to recycle after use, and it is not easy to degrade when discarded in nature, causing great harm to the ecological environment. With the increasing severity of "white pollution", people are constantly looking for effective solutions to the problem. After continuous efforts, various degradable plastics have come out one after another. Currently, the most effective and economical degradation technology should be oxidative-biodegradation. Oxo-biodegradation consists of two stages: the first stage of oxidative breakdown and the second stage of biodegrad...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L23/12C08L27/06C08L25/06C08L71/00C08L29/04C08K3/22
CPCC08K2003/2241C08L23/06C08J5/18C08J2323/06C08J2323/08C08J2323/12C08J2325/06C08J2327/06C08K2201/003C08K2201/011C08L23/0815C08L23/12C08L25/06C08L27/06C08L2201/06C08L2203/16C08L2205/03C08L2205/035C08L2207/066C08L71/02C08L29/04
Inventor 罗颖梁文耀宋霜霜杨薇禹筱元董先明
Owner 汕头保税区联通工业有限公司
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