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Degradable PHA/PLA mixture film and preparation method thereof

A blend and film technology, which is applied in the field of degradable PHA/PLA blend film and its preparation, can solve the problem of low transverse strength, inability to meet the strict requirements of card making and packaging material film mechanical properties, many crystal points, etc. problems, to achieve high melt strength and tensile strength, excellent industrial application value, high elongation at break

Active Publication Date: 2016-07-27
江苏华信高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PHA / PLA blend film prepared by the casting method has defects such as uneven transverse thickness, small transverse strength, many crystal points, and violent ribs on the film roll, which cannot meet the strict requirements of card making and packaging materials on the mechanical properties of the film.
In addition to the casting method, the blow molding method is also used for the preparation of PHA / PLA blended films, but the thickness range of the film produced by this method is narrow, between 0.04mm-0.10mm, because the film is too thin, its application range It is also limited, and the mechanical properties cannot meet the requirements of the card making and printing industries
So far there is no report about the preparation of PHA and PLA blend films by calendering

Method used

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  • Degradable PHA/PLA mixture film and preparation method thereof
  • Degradable PHA/PLA mixture film and preparation method thereof
  • Degradable PHA/PLA mixture film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1: PHA / PLA blend film formulation 1 and calendering molding process thereof

[0036] Material formula: PHA resin EM2001030 parts by weight, PLA resin 4032D70 parts by weight, 4.5% plasticizer tri-n-butyl citrate of the total weight of PHA and PLA, 0.8% inorganic filler calcium carbonate, PHA and 0.2% of the total weight of PLA Antioxidant 1076, 0.3% of the total weight of PHA and PLA lubricant pentaerythritol stearate, 0.1% of the total weight of PHA and PLA antistatic agent ethoxylated alkylamine.

[0037]Calendering process:

[0038] Weigh 100Kg of raw materials according to the formula, among which PHA and PLA resins are ground into powder by a disc mill. After drying, add it to a high-speed mixer together with other additives for mixing. The spindle speed of the high-speed mixer is 1300r / min, and the mixing time is 15min; the mixed raw materials are sent to the planetary exhaust extruder for melting and plasticization, and the extruder works The tempera...

Embodiment 2

[0039] Embodiment 2: PHA / PLA blend film formulation 2 and calendering molding process thereof

[0040] Material formula: PHA resin EM2001031 parts by weight, PLA resin 4032D69 parts by weight, 6.0% plasticizer tri-n-butyl citrate of the total weight of PHA and PLA, 0.9% inorganic filler calcium carbonate, PHA and 0.3% of total weight of PLA Antioxidant 1076, 0.34% of total weight of PHA and PLA Lubricant pentaerythritol stearate, 0.14% of total weight of PHA and PLA Antistatic agent ethoxylated alkylamine.

[0041] Weigh 100Kg of raw materials according to the formula, among which PHA and PLA resins are ground into powder by a disc mill. After drying, add it to a high-speed mixer together with other additives for mixing. The spindle speed of the high-speed mixer is 1300r / min, and the mixing time is 15min; the mixed raw materials are sent to the planetary exhaust extruder for melting and plasticization, and the extruder works The temperature is 200°C, the screw speed is 150r / m...

Embodiment 3

[0042] Embodiment 3: PHA / PLA blend film formulation 3 and calendering molding process thereof

[0043] Material formula: PHA resin EM2001033 parts by weight, PLA resin 4032D67 parts by weight, 7.5% plasticizer tri-n-butyl citrate of the total weight of PHA and PLA, 1.0% inorganic filler calcium carbonate, PHA and 0.4% by total weight of PLA Antioxidant 1076, 0.38% by total weight of PHA and PLA Lubricant Pentaerythritol Stearate, 0.18% by total weight of PHA and PLA Antistatic agent ethoxylated alkylamine.

[0044] Weigh 100Kg of raw materials according to the formula, among which PHA and PLA resins are ground into powder by a disc mill. After drying, add it to a high-speed mixer together with other additives for mixing. The spindle speed of the high-speed mixer is 650r / min, and the mixing time is 30min; the mixed raw materials are sent to the planetary exhaust extruder for melting and plasticization, and the extruder works The temperature is 152°C, the screw speed is 150r / mi...

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Abstract

The invention discloses a degradable PHA / PLA mixture film and a preparation method thereof. The degradable PHA / PLA mixture film comprises, by weight, 30-40 parts of PHA resin and 60-70 parts of PLA resin. Based on the total weight of the PHA and PLA, the degradable PHA / PLA mixture film comprises, by weight, 4.5-12% of a plasticizer, 0.8-1.5% of an inorganic filling material, 0.2-0.7% of an anti-oxidant, 0.3-0.5% of a lubricant and 0.1-0.3% of an antistatic agent. The PHA resin and PLA resin are ground to form powder, the power and other auxiliary agents are blended, are fed into an extruder and are subjected to fusion plasticization, and the extruded product is subjected to calendaring slice formation, taking-away, stretching, cooling, traction, reeling and cutting. The preparation method has simple and easy processes. The degradable PHA / PLA mixture film has performances satisfying usage requirements on a card-based industry, a printing industry and a package industry.

Description

technical field [0001] The invention belongs to the field of biodegradable material processing, and in particular relates to a degradable PHA / PLA blend film and a preparation method thereof. Background technique [0002] PHA is the abbreviation of polyhydroxyalkanoates (polyhydroxyalkanoates), which is the condition of bacterial growth imbalance (such as N, P, S, Mg limitation or O 2 Limit) accumulation of a cell energy and carbon source storage material, with good biocompatibility, biodegradability and thermal processing properties of plastics. Polylactic acid (PLA), also known as polylactide, is a biodegradable thermoplastic polymer obtained by using starch from corn, wheat, and cassava as the initial raw material to produce lactic acid through biological fermentation, and then artificially chemically synthesizing the lactic acid. [0003] PHA and PLA have physical and chemical properties similar to traditional plastics, and are also biodegradable. They can be used as deg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K13/02C08K5/11C08K3/26C08K3/34C08K5/17C08K5/134C08K5/526B29C43/24
Inventor 王瑜王光战陈亮
Owner 江苏华信高新材料有限公司
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