Completely biodegradable fiber-reinforced starch foam tableware and its preparation method

A biodegradable, fiber-reinforced technology, used in table utensils, home utensils, coatings, etc., can solve problems such as the inability to achieve high foaming ratio of starch, no tableware waterproof and oil-proof treatment, and non-biodegradable polyvinyl alcohol, etc. Molding cycle, good water and oil resistance, and small foam pore size

Active Publication Date: 2019-06-07
庞买只
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this invention also does not carry out waterproof and oil-proof treatment to the tableware, and it is also difficult to be used as tableware
[0010] CN 103937035 A and CN 103951852 A also disclose high-strength starch-based degradable environmentally friendly materials, but they all introduce non-biodegradable polyvinyl alcohol substances into their systems, which cannot be completely biodegraded
[0011] It can be seen from the above that the current literature on starch foam tableware is mostly focused on adding a large amount of wood pulp fiber and adding polyvinyl alcohol and other substances, which not only makes it impossible to achieve a high foaming ratio of starch, but also makes it difficult to guarantee biodegradability. These documents all do not carry out waterproof and oil-proof treatment to tableware, are difficult to be used as tableware

Method used

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  • Completely biodegradable fiber-reinforced starch foam tableware and its preparation method
  • Completely biodegradable fiber-reinforced starch foam tableware and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 50% tapioca starch (50 mesh), 20% polylactic acid short fiber (50D, 25mm), 10% polybutylene succinate powder (100 mesh), 5% 5000 mesh hydrotalcite ZnMg 3 al 2 (OH) 12 CO 3 mH 2 O is added in the mixer successively, stirred at normal temperature for 10 min, then added 3% diethanolamine, stirred at normal temperature for 15 min, finally added 10% foaming agent (water / stearic acid / baking soda=8 / 1 / 1 mass ratio), 2% 100-mesh glyceryl monostearate was stirred and mixed evenly at 40°C, then added to the mold, hot-pressed at 180°C for 40 seconds, and finally sprayed with a polybutylene terephthalate adipate film with a thickness of 10 μm. A completely biodegradable fiber-reinforced starch foam tableware is obtained.

Embodiment 2

[0048] 60% tapioca starch (100 mesh), 15% polylactic acid short fiber (100D, 10mm), 10% polybutylene terephthalate adipate powder (500 mesh), 3% 5500 mesh hydrotalcite ZnMg 3 al 2 (OH) 12 CO 3 mH 2 O is added in the agitator successively, stirred at normal temperature for 10 min, then added 3% triethanolamine, stirred at normal temperature for 15 min, finally added 8% foaming agent (water / palmitic acid / baking soda=6 / 2 / 2 mass ratio), 1 % 50 mesh glycerol monostearate was mixed evenly at 60°C, then added to the mold, hot-pressed at 250°C for 20 seconds, and finally sprayed with a polypropylene carbonate film with a thickness of 20 μm to obtain a completely biodegradable fiber-reinforced starch foam. soak tableware

Embodiment 3

[0050] 82% tapioca starch (150 mesh), 5% polyglycolic acid short fiber (10D, 50mm), 5% polybutylene terephthalate adipate powder (300 mesh), 1% 4500 mesh hydrotalcite ZnMg 3 al 2 (OH) 12 CO 3 mH 2 O is added in the mixer successively, stirred at normal temperature for 10 min, then added 1% monoethanolamine, stirred at normal temperature for 15 min, finally added 5% foaming agent (water / oleic acid / baking soda=7 / 2 / 1 mass ratio), 1 % 150 mesh glyceryl monostearate was stirred and mixed evenly at 50°C, then added to the mold, hot-pressed at 220°C for 60 seconds, and finally sprayed with a polybutylene succinate film with a thickness of 5 μm to obtain a completely biodegradable Fiber reinforced starch foam tableware.

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Abstract

The invention relates to biodegradable material, specifically relates to a full biodegradable fiber-reinforced starch foaming tableware and a preparation method thereof. The foaming tableware is divided into two layers of an outer layer and an internal layer, the outer layer is prepared from the following components in mass percent: 50 to 82 percent of cassava starch, 5 to 20 percent of biodegradable short fiber, 5 to 10 percent of biodegradable flexibilizer, 1 to 3 percent of compatilizer, 5 to 10 percent of foaming agent, 1 to 5 percent of heat insulation agent and 1 to 2 percent of releasing agent. All the components are mixed and stirred uniformly, then biodegradable thin film is sprayed and coated on a mixture subjected to hot press molding so that the full biodegradable fiber-reinforced starch foaming tableware is prepared. The tableware has the advantages that the strength is high, the rigidity is large, the toughness is good, the foaming ratio is high, the foaming aperture is small, the heat insulation is good, the water-resistance and oil-resistance is good, and all the material can be fully biodegraded so as to be the best choice to substitute a foaming polystyrene tableware.

Description

technical field [0001] The invention relates to biodegradable tableware, in particular to a fully biodegradable fiber-reinforced starch foamed tableware and a preparation method thereof. Background technique [0002] As we all know, foam tableware was first used on trains. Since discarded plastic waste caused serious damage to the ecology and landscape along the railway, the Ministry of Railways of my country banned the use of foam tableware in railway station cars in May 1995. Traditional disposable foamed plastic tableware mainly uses polystyrene PS resin as raw material, after being heated and melted at high temperature in an extruder, foaming agent butane and the like are added to extrude the sheet. After the sheet is rolled, it is placed in a ventilated and humid environment for health preservation, and then it is heated and blistered for the second time to form various tableware such as fast food boxes, soup bowls, instant noodle bowls, fresh trays, etc. In 1999, 2005...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L67/04C08L67/02C08L69/00C08K3/26C08K5/103C08K5/17C08J9/12C08J9/08C08J9/14C08J7/04A47G19/00
CPCA47G19/00C08J7/0427C08J9/08C08J9/125C08J9/142C08J2203/02C08J2203/10C08J2203/12C08J2203/204C08J2303/02C08J2467/02C08J2467/04C08K2201/003C08L3/02C08L2201/06C08L2203/14C08L2205/03C08L2205/16C08L67/04C08L67/02C08K3/26C08K5/103C08K5/17C08L69/00
Inventor 庞买只梁海天
Owner 庞买只
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