CN101250295A - Degradable plastic film - Google Patents
Degradable plastic film Download PDFInfo
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- CN101250295A CN101250295A CNA2008100110218A CN200810011021A CN101250295A CN 101250295 A CN101250295 A CN 101250295A CN A2008100110218 A CNA2008100110218 A CN A2008100110218A CN 200810011021 A CN200810011021 A CN 200810011021A CN 101250295 A CN101250295 A CN 101250295A
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Abstract
A degradable plastic film is film whose components are film grade polyethylene and film grade polylactic acid, wherein the weight percentage of film grade polyethylene is 50%-80%, and the weight percentage of film grade polylactic acid is 20%-50%. Polylactic acid is optimally complete degradable plastic, and degradable plastic film which has different degradation speed can be prepared through mixing film grade polyethylene and film grade polylactic acid. The invention can be produced through using a common plastic film blowing machine, film grade polyethylene particles and film grade polylactic acid can be evenly mixed when in production, and degradable plastic film is blown out by the plastic film blowing machine. The components of the film are polylactic acid and film grade polyethylene plastic, and waste polylactic acid film can be ensured to degrade in environment after wasted, since polylactic acid can be automatically decomposed under the condition that environment temperature is higher 55 DEG C or under the effect of oxygen-enriched and microbe.
Description
Technical field
The present invention relates to the composition of a kind of degradable plastic film, particularly a kind of degradable plastic film.
Background technology
The plastics bag of making of plastics film is light, thin, waterproof, intensity is big, cost is low, be a kind of good wrapping material, the use of plastics bag brings great convenience for people's life, make the consumption of plastics bag increasing, be difficult for reclaiming, being difficult for degraded with later waste plastic bag, a large amount of waste plastic bags become current contaminate environment a serious problem.In order to alleviate the pollution of plastics film to environment, people have developed some degradable plastic films.Degradable plastic film is a film, its moiety has the film-grade plastics and can cause the component that plastics produce degraded, as starch, lime carbonate etc., this degradable plastic film is the addition type degradable plastic film, and the addition type degradable plastic film is to improve environment to have brought into play certain active effect.But processing performance the plastics film product rerum natura and the outward appearance bad, that make of this degradable plastic film processing are relatively poor; In addition, the degraded of this degradable plastic film needs certain rigid condition, and the environment of plastics film after discarded, be to be laid in the refuse disposal system of sealing, be exactly to expose to the open air in the unfixed physical environment of condition, be difficult to guarantee the needed rigid condition of this degradation of plastic film, no matter these degradative plasticss are can not degrade well because being subjected to condition restriction in refuse disposal system or at physical environment in most of the cases.In the prior art, do not have and in the environment after discarded, to guarantee the degradable plastic film of degraded.
Summary of the invention
The objective of the invention is in order to overcome above-mentioned deficiency, propose to guarantee the degradable plastic film of degraded in a kind of environment after discarded.
The present invention is achieved using the following method.
Degradable plastic film is a film, and its moiety has film-grade polyethylene and film-grade poly(lactic acid), and the poly weight percentage of film-grade is 50%～80%, and the weight percentage of film-grade poly(lactic acid) is 20%～50%.
Poly(lactic acid) (PLA) is also referred to as polylactide, belongs to polyester family, and a lot of amyloid farm crop can be as the raw material of preparation poly(lactic acid), and the main raw material of poly(lactic acid) is a corn, is " corn plastics " so poly(lactic acid) is commonly called as.Poly(lactic acid) has the best tensile strength and extensibility, can make film with the method for blowing, and the film of making has good glossiness and transparency, and is nontoxic to human body, is suitable for making food pack.Polylactic acid film is stable performance at normal temperatures, be higher than 55 ℃ or decomposition automatically under oxygen enrichment and action of microorganisms in envrionment temperature, polylactic acid film after discarded can be by the digestion of degrading fully of occurring in nature microorganism, final carbonic acid gas and the water of generating, poly(lactic acid) is the ideal complete-degradable plastic, can be made into the degradable plastics with different degradation speeds with the film-grade poly(lactic acid) with the blend of film-grade vinyon.
The present invention can mix film-grade polyethylene particle and film-grade poly(lactic acid) during production with common plastic film blowing machine production, blows out degradable plastic film with plastic film blowing machine.
Composition branch of the present invention has poly(lactic acid) and film-grade polyethylene, because poly(lactic acid) is higher than 55 ℃ or decomposition automatically under oxygen enrichment and action of microorganisms in envrionment temperature, in the environment of polylactic acid film after discarded after discarding, can guarantee degraded.
Below in conjunction with embodiment, the present invention is further described.
Embodiment
Film-grade polyethylene among the present invention can be film-grade linear low density polyethylene (LLDPE), also can be film-grade linear low density polyethylene (LLDPE) and film-grade new LDPE (film grade) (LDPE) and usefulness, also can be film-grade linear low density polyethylene (LLDPE) and film-grade high density polyethylene(HDPE) (HDPE) and usefulness.
Embodiment 1
Degradable plastic film is a film, and its moiety has film-grade linear low density polyethylene and film-grade poly(lactic acid), and the weight percentage of film-grade linear low density polyethylene is 70%, and the weight percentage of film-grade poly(lactic acid) is 30%.
Embodiment 2
Degradable plastic film is a film, and its moiety has film-grade linear low density polyethylene and film-grade poly(lactic acid), and the weight percentage of film-grade linear low density polyethylene is 60%, and the weight percentage of film-grade poly(lactic acid) is 40%.
Embodiment 3
Degradable plastic film is a film, its moiety has film-grade linear low density polyethylene, film-grade new LDPE (film grade) and film-grade poly(lactic acid), the weight percentage of film-grade linear low density polyethylene is 50%, the weight percentage of film-grade new LDPE (film grade) is 30%, and the weight percentage of film-grade poly(lactic acid) is 20%.
Embodiment 4
Degradable plastic film is a film, its moiety has film-grade linear low density polyethylene, film-grade new LDPE (film grade) and film-grade poly(lactic acid), the weight percentage of film-grade linear low density polyethylene is 60%, the weight percentage of film-grade new LDPE (film grade) is 20%, and the weight percentage of film-grade poly(lactic acid) is 20%.
Embodiment 5
Degradable plastic film is a film, its moiety has film-grade linear low density polyethylene, film-grade high density polyethylene(HDPE) and film-grade poly(lactic acid), the weight percentage of film-grade linear low density polyethylene is 50%, the weight percentage of film-grade high density polyethylene(HDPE) is 30%, and the weight percentage of film-grade poly(lactic acid) is 20%.
Embodiment 6
Degradable plastic film is a film, its moiety has film-grade linear low density polyethylene, film-grade high density polyethylene(HDPE) and film-grade poly(lactic acid), the weight percentage of film-grade linear low density polyethylene is 30%, the weight percentage of film-grade high density polyethylene(HDPE) is 50%, and the weight percentage of film-grade poly(lactic acid) is 20%.
Claims (7)
1. a degradable plastic film is a film, its moiety has the film-grade polyethylene, it is characterized in that: its moiety also has the film-grade poly(lactic acid), and the poly weight percentage of film-grade is 50%～80%, and the weight percentage of film-grade poly(lactic acid) is 20%～50%.
2. by the described degradable plastic film of claim 1, it is characterized in that: described film-grade polyethylene is the film-grade linear low density polyethylene, the weight percentage of film-grade linear low density polyethylene is 70%, and the weight percentage of film-grade poly(lactic acid) is 30%.
3. by the described degradable plastic film of claim 1, it is characterized in that: described film-grade polyethylene is the film-grade linear low density polyethylene, the weight percentage of film-grade linear low density polyethylene is 60%, and the weight percentage of film-grade poly(lactic acid) is 40%.
4. by the described degradable plastic film of claim 1, it is characterized in that: described film-grade polyethylene has film-grade linear low density polyethylene and film-grade new LDPE (film grade), the weight percentage of film-grade linear low density polyethylene is 50%, the weight percentage of film-grade new LDPE (film grade) is 30%, and the weight percentage of film-grade poly(lactic acid) is 20%.
5. by the described degradable plastic film of claim 1, it is characterized in that: described film-grade polyethylene has film-grade linear low density polyethylene and film-grade new LDPE (film grade), the weight percentage of film-grade linear low density polyethylene is 60%, the weight percentage of film-grade new LDPE (film grade) is 20%, and the weight percentage of film-grade poly(lactic acid) is 20%.
6. by the described degradable plastic film of claim 1, it is characterized in that: described film-grade polyethylene has film-grade linear low density polyethylene and film-grade high density polyethylene(HDPE), the weight percentage of film-grade linear low density polyethylene is 50%, the weight percentage of film-grade high density polyethylene(HDPE) is 30%, and the weight percentage of film-grade poly(lactic acid) is 20%.
7. by the described degradable plastic film of claim 1, it is characterized in that: described film-grade polyethylene has film-grade linear low density polyethylene and film-grade high density polyethylene(HDPE), the weight percentage of film-grade linear low density polyethylene is 30%, the weight percentage of film-grade high density polyethylene(HDPE) is 50%, and the weight percentage of film-grade poly(lactic acid) is 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100110218A CN101250295A (en) | 2008-04-15 | 2008-04-15 | Degradable plastic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100110218A CN101250295A (en) | 2008-04-15 | 2008-04-15 | Degradable plastic film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101250295A true CN101250295A (en) | 2008-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100110218A Pending CN101250295A (en) | 2008-04-15 | 2008-04-15 | Degradable plastic film |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174222A (en) * | 2011-01-31 | 2011-09-07 | 开原市升达塑料彩印厂 | Degradable plastic film and production method thereof |
| CN102276895A (en) * | 2011-06-21 | 2011-12-14 | 深圳市通产丽星股份有限公司 | Biodegradable polyethylene composite material and preparation method thereof |
| CN102796357A (en) * | 2011-05-23 | 2012-11-28 | 郑文彬 | Method for preparing fully-biodegradable agricultural film |
| CN105566876A (en) * | 2016-03-04 | 2016-05-11 | 孟宪东 | Degradable plastic bag/mulching film and preparation method thereof |
| CN107698853A (en) * | 2017-11-13 | 2018-02-16 | 桐城市中汇塑业有限公司 | A kind of high-performance composite plastic packaging material |
| CN112647903A (en) * | 2020-12-28 | 2021-04-13 | 中国科学院广州能源研究所 | Expansion screen pipe and construction method thereof |
| CN117777584A (en) * | 2024-02-28 | 2024-03-29 | 石家庄市明联电力科技有限公司 | Degradable cable composite material, preparation method thereof and cable |
-
2008
- 2008-04-15 CN CNA2008100110218A patent/CN101250295A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174222A (en) * | 2011-01-31 | 2011-09-07 | 开原市升达塑料彩印厂 | Degradable plastic film and production method thereof |
| CN102174222B (en) * | 2011-01-31 | 2013-05-08 | 开原市升达塑料彩印厂 | Degradable plastic film and production method thereof |
| CN102796357A (en) * | 2011-05-23 | 2012-11-28 | 郑文彬 | Method for preparing fully-biodegradable agricultural film |
| CN102796357B (en) * | 2011-05-23 | 2013-11-13 | 郑文彬 | Method for preparing fully-biodegradable agricultural film |
| CN102276895A (en) * | 2011-06-21 | 2011-12-14 | 深圳市通产丽星股份有限公司 | Biodegradable polyethylene composite material and preparation method thereof |
| CN105566876A (en) * | 2016-03-04 | 2016-05-11 | 孟宪东 | Degradable plastic bag/mulching film and preparation method thereof |
| CN107698853A (en) * | 2017-11-13 | 2018-02-16 | 桐城市中汇塑业有限公司 | A kind of high-performance composite plastic packaging material |
| CN112647903A (en) * | 2020-12-28 | 2021-04-13 | 中国科学院广州能源研究所 | Expansion screen pipe and construction method thereof |
| US11773697B2 (en) | 2020-12-28 | 2023-10-03 | Guangzhou Institute Of Energy Conversion, Chinese Academy Of Sciences | Expandable liner and method for running the same |
| CN117777584A (en) * | 2024-02-28 | 2024-03-29 | 石家庄市明联电力科技有限公司 | Degradable cable composite material, preparation method thereof and cable |
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