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Biodegradable plastic film and preparation method thereof

A technology of plastic film and degradable masterbatch, applied in the field of degradable plastic film and its preparation, can solve the problems of inability to degrade automatically, harm to the environment and human body, etc., and achieve the effects of formula safety, improving soil environment and accelerating the degradation process.

Inactive Publication Date: 2018-10-16
芜湖同达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

[0003] However, while people appreciate the convenience brought by plastic products, they are also deeply troubled by them. Most of the plastic products on the market cannot be automatically degraded, so long-term accumulation in the environment will have a significant impact on the environment and human body. the harm of

Method used

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  • Biodegradable plastic film and preparation method thereof
  • Biodegradable plastic film and preparation method thereof
  • Biodegradable plastic film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A degradable plastic film, the main resin of the degradable film is LDPE resin and LLDPE resin with a mass ratio of 3:1; and 30% composite modified polyolefin degradation masterbatch is added to the main resin; the Composite modified polyolefin degradation masterbatch, including the following raw materials in parts by weight:

[0033]

[0034] Described superfine composite modification inorganic powder comprises the raw material of following weight:

[0035] 85 parts of composite modified superfine ground calcium carbonate;

[0036] Nanoscale SiO 2 10 copies;

[0037] KH-550 silane coupling agent 0.5 parts.

[0038] The particle size D97≤1μm of the composite modified superfine ground calcium carbonate; the nano-scale SiO 2 The particle size is 80-100nm.

[0039] The silane coupling agent is KH-550; the compound degradation aid is FeSt 3 -MnSt 2 and biosurfactant, the weight ratio of the two is 10:1; the MRF=2-4g / 10min of the LDPE resin.

[0040] The preparat...

Embodiment 2

[0053] A degradable plastic film, the main resin of the degradable film is LDPE resin and LLDPE resin with a mass ratio of 3:1; and 30% composite modified polyolefin degradation masterbatch is added to the main resin; the Composite modified polyolefin degradation masterbatch, including the following raw materials in parts by weight:

[0054]

[0055] Described superfine composite modification inorganic powder comprises the raw material of following weight:

[0056] 90 parts of composite modified superfine ground calcium carbonate;

[0057] Nanoscale SiO 2 13 copies;

[0058] KH-550 silane coupling agent 0.8 parts.

[0059] The particle size D97≤1μm of the composite modified superfine ground calcium carbonate; the nano-scale SiO 2 The particle size is 80-100nm.

[0060] The silane coupling agent is KH-550; the compound degradation aid is FeSt 3 -MnSt 2 and biosurfactant, the weight ratio of the two is 10:1; the MRF=2-4g / 10min of the LDPE resin.

[0061] The preparat...

Embodiment 3

[0068] A degradable plastic film, the main resin of the degradable film is LDPE resin and LLDPE resin with a mass ratio of 3:1; and 30% composite modified polyolefin degradation masterbatch is added to the main resin; the Composite modified polyolefin degradation masterbatch, including the following raw materials in parts by weight:

[0069]

[0070] Described superfine composite modification inorganic powder comprises the raw material of following weight:

[0071] 88 parts of composite modified superfine ground calcium carbonate;

[0072] Nanoscale SiO 2 11 copies;

[0073] KH-550 silane coupling agent 1 part.

[0074] The particle size D97≤1μm of the composite modified superfine ground calcium carbonate; the nano-scale SiO 2 The particle size is 80-100nm.

[0075] The silane coupling agent is KH-550; the compound degradation aid is FeSt 3 -MnSt 2 and biosurfactant, the weight ratio of the two is 10:1; the MRF of the LDPE resin=2-4g / 10min.

[0076] The preparation...

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Abstract

The invention discloses a biodegradable plastic film and a preparation method thereof. The matrix resin of the biodegradable film refers to LDPE resins and LLDPE resins according to a mass ratio of 3:1; 30% of a composite modified polyolefin degradation master batch is added into the matrix resin; the composite modified polyolefin degradation master batch comprises the following raw materials in parts by weight: 55-75 parts of superfine composite modified inorganic powder, 1.5-2.5 parts of a compound degradation promoter, 25-35 parts of LDPE resin and 2.5-5 parts of low-molecular polyethylene.According to the addition of the composite modified polyolefin degradation master batch, the tensile strength and elongation at break of the plastic film are improved, the longitudinal tensile strength can reach 21-24 MPa, and the lateral tensile strength can reach 23-25 MPa; the longitudinal elongation at break can reach 665-680% and the transverse elongation at break can reach 875-885%; moreover, the plastic film has excellent biodegradability, the retention rate of the longitudinal elongation at break of film fragments after degradation is less than or equal to 5.5%, and the retention rateof the transverse elongation at break is less than or equal to 5.5%. The biodegradable plastic film can be applied to outer surface protection of various products in a plurality of fields.

Description

technical field [0001] The invention relates to a degradable plastic film and a preparation method thereof. Background technique [0002] Plastic films are films made of polyvinyl chloride, polyethylene, polypropylene, polystyrene, and other resins that are used for packaging and as laminations. Plastic packaging and plastic packaging products account for an increasing share in the market, especially composite plastic flexible packaging, which has been widely used in food, medicine, chemical and other fields, among which food packaging accounts for the largest proportion, such as beverage packaging , quick-frozen food packaging, cooking food packaging, fast food packaging, etc., these products have brought great convenience to people's lives. [0003] However, while people appreciate the convenience brought by plastic products, they are also deeply troubled by them. Most of the plastic products on the market cannot be automatically degraded, so long-term accumulation in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/06C08K9/06C08K3/36C08K3/26C08K5/098C08J3/22C08J5/18
CPCC08J3/226C08J5/18C08J2323/06C08J2423/06C08J2423/08C08K3/36C08K5/098C08K9/06C08K13/06C08K2003/265C08K2201/003C08K2201/011C08K2201/014
Inventor 陈永辉马琼陈默
Owner 芜湖同达新材料科技有限公司
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