CN1146315A

CN1146315A - Making method for disposable biological degradable tableware

Info

Publication number: CN1146315A
Application number: CN 96118091
Authority: CN
Inventors: 何昌义
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-05
Filing date: 1996-04-05
Publication date: 1997-04-02

Abstract

The present invention mainly solves the problems of the existent foamed poly styrene made disposable tableware which is non-biodegradable and pollutes the environment and the productive cost is too high of the existent biodegradable material. The characteristic lies in that it is made from cereals, membrane firming agent capable of reacting with the starch and protein containing in the cereals to form waterproof membrane, reinforcer, plasticizing agent, covering agent and water. The processing method consists of mixing stock, kneading by adding water, refining and homogenizing by double roller machine, hot press forming, aftertreatment and packing.

Description

The manufacture method of biodegradable disposable tableware

The present invention relates to a kind of manufacture method of disposable tableware, specifically a kind of is the manufacture method of the biodegradable disposable tableware of component with additives such as grain and hardeners.

Existing disposable tableware mainly is to adopt expanded polystyrene (EPS) or other thermoplastic to make, though have function admirable, process advantage simple, cheap, easy to use, but can not be caused environmental pollution by degradation characteristic, banned use of gradually in recent years owing to what have.And the material with complete biodegradable characteristic becomes its substitute preferably, mainly contains following two kinds of manufacture methods at present: make polyhydroxyalkanoate class of producing as biological fermentation process and poly-maltotriose etc. by biological engineering method is synthetic with starch 1.; 2. be main filler with starch, converted starch or cereals grain, add various nontoxic additive, behind homogeneous, make,, in its process, adopted a large amount of solvents and expensive crosslinking agent as the method that U.S. Pat is introduced for No. 5320669.Though the material that above-mentioned two kinds of methods make has biodegradation character, does not produce environmental pollution, and be fit to make disposable tableware, because its production equipment has high input, therefore the production cost height does not also have practical value at present.

The purpose of this invention is to provide that a kind of function admirable, processing are simple, the solar heat protection water-based can be good, cheap, the manufacture method of biodegradable disposable tableware.

The present invention adopts grain and can form the hardener and the reinforcing agent of water-repellent film with contained starch in the grain and protein generation chemical reaction, plasticizer, masking agent and water are made, wherein cereal product comprises wheat, corn, cassava and potato, hardener has acrylamide and/or bisacrylamide and/or two ethene sulfo group benzene and/or zero-methyl-isourea toluene sulfonic acide and/or two (ethene sulfonymethyl) ether and/or butenoic acid lactone and/or polyvinyl acetate and/or polyvinyl alcohol and/or polyureas and/or starch dialdehyde, reinforcing agent has cellulose substances, plasticizer has the polyalcohols material, and masking agent has lithopone, carve hundred powder and titanium hundred powder.

The present invention can realize by following mode:

A. dried grain is crushed to 60 orders～80 orders;

B. mediate adding water after each mixing of materials, its weight ratio is a material: water=100: 20～30;

C. the material after will mediating is sent into two roller machine refining homogeneous;

D. will refine material behind the homogeneous and send in the mould hot-formingly, its temperature is 85 ℃～120 ℃, and the time is 5～50 seconds/time, and pressure is 100 kilograms/time～50 tons/time;

E. formed article is carried out post processing and packs promptly obtaining biodegradable disposable tableware.

The percentage by weight of above-mentioned each component is:

Grain 60～70

Hardener 7～10

Reinforcing agent 8～15

Plasticizer 4～8

Masking agent 1～2

The present invention has completely biodegradable, superior mechanical, solar heat protection water-based and cheap advantage, can replace expanded polystyrene (EPS) to make various disposable foodstuffs or beverage tableware.

Embodiment 1

Weighing each component by weight percentage:

Wheat flour (more than 60 orders) 70

Butenoic acid lactone 4

Zero-methyl-isourea toluene sulfonic acide 3

Bamboo powder (60 order) 15

Glycerine 6.5

Titanium dioxide 1.5

The consumption of water is a material: water=100: 20～30 (weight ratio)

By the aforementioned manner operation, earlier wheat flour, bamboo powder (handling through bleaching), titanium dioxide are mixed, add butenoic acid lactone and zero-methyl-isourea pyrovinic acid, G ﹠ W again, and in kneader, mediate for several times, change on the two roller machine refining then over to and carry out homogeneous (plasticizing) for three times, at last material cut, accurately add heating pressurization in the mould after the weighing, cut film, the demoulding, shaping and drying and packing and promptly make various disposable tablewares, its performance is as follows:

Heat-resisting water (80～95 ℃) soaks 1 hour (cooling naturally) does not have distortion

(180 ° of doublings) 20～25 times (lunch box with cover) folded in folding

3 kilograms of compression resistances are undeformed

Embodiment 2

Weighing by weight percentage:

Wheat flour (60 order) 30

Corn flour (60 order) 40

Other component is with example 1, and method of operating and properties of product are also with example 1.

Embodiment 3

Weighing each component by weight percentage:

Wheat flour 70

Polyvinyl acetate 2

Polyvinyl alcohol 3

Polyureas 4

Bamboo powder 15

Glycerine 4.5

Titanium dioxide 1.5

The consumption of water is a material: water=100: 20 (weight ratio)

Method of operating and properties of product are with example 1.

Claims

1. the manufacture method of a biodegradable disposable tableware, the hardener and the reinforcing agent that it is characterized in that adopting grain and can form water-repellent film with contained starch in the grain and protein generation chemical reaction, plasticizer, masking agent and water are made, wherein grain comprises wheat, corn, cassava and potato, hardener has acrylamide and/or bisacrylamide and/or two ethene sulfo group benzene and/or zero-methyl-isourea toluene sulfonic acide and/or two (ethene sulfonymethyl) ether and/or butenoic acid lactone and/or poly-vinegar acyl vinyl acetate and/or polyvinyl alcohol and/or polyureas and/or starch dialdehyde, reinforcing agent has cellulose substances, plasticizer has the polyalcohols material, masking agent has lithopone, rongalite and titanium dioxide, its manufacture method is:

A. dried grain is crushed to 60 orders～80 orders,

B. mediate adding water after each mixing of materials, its weight ratio is a material: water=100: 20～30,

C. the material after will mediating is sent into two roller machine refining homogeneous,

D. will refine material behind the homogeneous and send in the mould hot-formingly, its temperature is 85 ℃～120 ℃, and the time is 5～50 seconds/time, and pressure is 100 kilograms/time～50 tons/time,

2. by the manufacture method of the described a kind of biodegradable disposable tableware of claim 1, it is characterized in that the percentage by weight of each component is:

Grain 65～70

Hardener 7～10

Reinforcing agent 8～15

Plasticizer 4～8

Masking agent 1～2