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Inorganic filler full-biodegradable composite as well as preparation method and application of inorganic filler full-biodegradable composite

A technology for inorganic fillers and composite materials, applied in the field of fully biodegradable inorganic filler composite materials and their preparation, can solve problems such as low tear strength, easy cracking, poor compatibility, etc., to improve compatibility and increase tearing Strength, effect of increasing compatibility

Inactive Publication Date: 2015-04-01
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN201310041457.2 discloses a fully biodegradable polylactic acid composite material, which can improve the toughness of the material by compounding high molecular weight and low molecular weight polylactic acid, but the modified film or sheet still has low tear strength , poor compatibility, prone to cracking and other problems during use

Method used

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  • Inorganic filler full-biodegradable composite as well as preparation method and application of inorganic filler full-biodegradable composite
  • Inorganic filler full-biodegradable composite as well as preparation method and application of inorganic filler full-biodegradable composite

Examples

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preparation example Construction

[0046] Preparation of inorganic filler fully biodegradable masterbatch:

[0047] According to the ratio in Table 1, the polylactic acid was first dried in an oven at 80°C for 5 hours; the dried polylactic acid was mixed with inorganic fillers,

[0048] Lubricants and compatibilizers are mechanically blended in a high-speed mixer for 5 minutes; the uniformly mixed materials in step (2) are fed into a twin-screw extruder for melt plasticization, extrusion, and granulation to obtain A1~A5 , B1-B5 inorganic filler fully biodegradable masterbatch;

[0049] The twin-screw extruder is a co-rotating parallel twin-screw extruder, and its set temperature is: Zone 1: 60-90°C, Zone 2: 120-150°C, Zone 3: 140-170°C, Zone 4: 170~190℃, Zone 5: 170~190℃, Zone 6: 170~190℃,

[0050] Zone 7: 170~190℃, zone 8: 170~190℃, zone 9: 170~190℃, head: 170-190℃, screw speed: 300rpm. The screw aspect ratio is 40:1.

[0051] Table 1 A 1~A5, B1-B5 inorganic filler fully biodegradable masterbatch (parts b...

Embodiment 1-5 and comparative example 1-5

[0054] The inorganic filler fully biodegradable masterbatch obtained above and polylactic acid were mixed in a high-speed mixer at room temperature for 5 minutes according to the ratio in Table 2, and then added to a twin-screw machine for extrusion blending and granulation to obtain an inorganic filler fully biodegradable composite material. Put the composite material in an extrusion blown film machine, set the screw temperature at 140-180°C, and extrude and blow it into a film with a thickness of 25 microns. The mechanical properties of the film are shown in Table 2.

[0055]Table 2 The composition and performance results of each component of the embodiment and the comparative example

[0056]

[0057] From the comparison of Comparative Example 1 and Example 3, it can be seen that the addition of the lubricant can effectively prevent the agglomeration of the filler and make the filler have higher dispersibility, and the film product obtained after blending has higher mecha...

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Abstract

The invention discloses an inorganic filler full-biodegradable composite as well as a preparation method and application of the inorganic filler full-biodegradable composite. The inorganic filler full-biodegradable composite comprises the following components: 5-50 parts of inorganic filler full-biodegradable masterbatches and 50-95 parts of polylactic acid, wherein the inorganic filler full-biodegradable masterbatches comprise the following components: 20-80 parts of polylactic acid, 20-80 parts of inorganic filler, 0.1-10 parts of a lubricating agent and 0.1-5 parts of a compatilizer; and the inorganic filler is one or a combination of modified kaolin, modified white carbon black and modified montmorillonite. According to the inorganic filler full-biodegradable composite, the modified montmorillonite, the modified kaolin or the modified white carbon black is added as an enhancer, and an epoxy acrylic copolymer is introduced as the compatilizer, so that the compatibility of the inorganic filler and matrix resin is enhanced, and the uniform dispersion is achieved; and the masterbatches are added into the polylactic acid, so that the problem of relatively low tearing strength of a polylactic acid film and a sheet can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of polymer material modification, in particular to an inorganic filler fully biodegradable composite material and a preparation method and application thereof. Background technique [0002] Polylactic acid (PLA) is a kind of corn starch as raw material, lactic acid is obtained through biological fermentation, and then polymerized to finally obtain polylactic acid resin. It has two advantages: First, it is biodegradable and can be easily decomposed into carbon monoxide and water in the soil, which can be absorbed by plants and recycled. Second, it is a non-petroleum-based plastic, derived from renewable resources such as plants. Under the situation of increasingly tense petroleum energy, the development and research of polylactic acid resin is particularly important. The properties of polylactic acid itself are similar to the general-purpose plastic polypropylene, such as high modulus, high tensile strength ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L33/00C08K13/06C08K9/04C08K9/06C08K3/34C08K3/36C08J3/22B29C47/92B29L7/00B29C48/92
Inventor 熊凯焦建王林张新国钟宇科苑仁旭赵巍徐依斌曾详斌蔡彤旻夏世勇袁志敏
Owner KINGFA SCI & TECH CO LTD
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