TW202330773A - Biodegradable composite material and production process thereof having environmental protection and antibacterial effects - Google Patents

Abstract

The present invention relates to a biodegradable composite material and a production process thereof. The biodegradable composite material is in the form of granules and contains main raw materials. The main raw materials include calcium carbonate, cellulose acetate, calcium oxide, talc and quartz. The production process of the biodegradable composite material includes the following steps: (a) a first raw material adding step by adding the main raw material into a mixer; (b) a first stirring and drying step by performing stirring and drying operations on the main raw material; (c) a first granulation step by placing the main raw material after stirring and drying into a granulator to perform first granulation; (d) a second raw material adding step by adding the granules following the first granulation together with auxiliary raw materials into a mixer; (e) a second stirring and drying step by performing stirring and drying operations on the granules following the first granulation and the auxiliary raw materials; (f) a second granulation step by placing the aforementioned granules and the auxiliary raw materials subjected to stirring and drying and first granulation into a granulator for performing second granulation to obtain a biodegradable composite material finished product. Thereby, the product formed by the composite material has environmental protection and antibacterial effects, the raw materials used for making the composite material are easy to obtain, and the resulting product is easy to preserve and not prone to embrittlement and cracking.

Description

Bioautodegradable composite material and its production process

The invention relates to a composite material, especially to a bioautodegradable composite material and its production process.

By the way, the concept of green sustainability makes consumers more inclined to choose environmentally friendly items. However, most common items are made of plastic materials. Although plastic products bring consumers a lot of convenience in use, they do not comply with global The principle of environmental protection of plastics, and the natural degradation function is not considered. Even if there is a degradation function, the plastic itself still occupies a large proportion. When a large amount of waste is piled up as garbage, it will take up a lot of land and resources, and the damage to the pH value of the land, environmental sanitation, and soil quality will also be an irreparable catastrophe. If a large amount of incineration is considered, it is more likely to cause A large amount of poisonous (such as: dioxin or other toxic substances) and carbon dioxide gas are produced, and the air pollution treatment equipment of the incinerator needs to be increased, resulting in a relatively high cost of the incinerator equipment, which is not in line with the economic benefits of industrial utilization.

In order to improve the above problems, there is a patent application No. 098102517 "environmentally friendly molded product", which includes: a main body is made of a biodegradable composition formed into a predetermined shape in a predetermined way, the The biodegradable composition includes a polymer component, and the polymer component includes a main raw material selected from polysuccinate-1,4-butylene glycol ester, and the polymer group of the biodegradable composition The part also includes a sub-material mixed with the main material, the sub-material being selected from polylactic acid.

The polylactic acid (Polylactic Acid or Polylactide, abbreviated as PLA) is a new type of biodegradable material, which is made of starch raw materials proposed by renewable plant resources (such as corn). The starch raw materials are saccharified to obtain glucose, and then glucose and certain High-purity lactic acid is produced by fermentation of bacteria, and polylactic acid with a certain molecular weight is synthesized by chemical synthesis. It has good biodegradability and can be completely degraded by microorganisms in nature after use, eventually producing carbon dioxide and water without polluting the environment, which is very beneficial to protecting the environment and is recognized as an environmentally friendly material.

However, most of the polylactic acid is made of corn flour. Not only the limited supply of raw materials of corn flour makes the production of environmentally friendly molded products more difficult and costly, but also the environmentally friendly molded products are not easy to store and are prone to embrittlement. , Cracking situation.

In view of the above-mentioned shortcomings of the conventional biodegradable composition, the present inventor came up with the present invention after thinking and creating ideas, after many discussions, trial sample tests, and many times of amendments and improvements.

The invention provides a bioautodegradable composite material and its production process. The bioautodegradable composite material is in the form of granules and contains main raw materials. The main raw materials include calcium carbonate, cellulose acetate, calcium oxide, talcum powder and quartz. The content of the calcium carbonate is greater than the content of the cellulose acetate, the calcium oxide, the talcum powder and the quartz; the production process of the bioautodegradable composite material includes the following steps:

(a) the first raw material addition step, the main raw material is added into a mixer, and the main raw material includes calcium carbonate, cellulose acetate and calcium oxide;

(b) the first stirring and drying step, using the mixer to stir and dry the main raw material;

(c) the first granulation step, putting the above-mentioned main raw materials after stirring and drying into a granulator, and performing the first granulation;

(d) The second raw material addition step, adding the granular material obtained by the first granulation together with auxiliary raw materials into a mixer, the auxiliary raw materials include antioxidants and heat stabilizers;

(e) the second stirring and drying step, using the mixer to stir and dry the granules obtained by the first granulation and the auxiliary raw materials;

(f) the second granulation step, the above-mentioned granules and auxiliary raw materials obtained by the first granulation after stirring and drying are placed in a granulator, and the second granulation is carried out. The granules obtained from the secondary granulation are the finished products of bioautomatically degradable composite materials.

The main purpose of the bio-automatically degradable composite material and its production process of the present invention is that the composite material can be processed into an article with a predetermined shape. The article has the characteristics of automatic degradation, and can be decomposed in the natural environment after being discarded. It is environmentally friendly and antibacterial In addition, the raw materials used in the combined material are easy to obtain, so the difficulty and cost of production are reduced, and the products made are easy to preserve and are not prone to embrittlement and cracking.

The drawings of the preferred embodiments of the present invention are further described below in order to enable those who are familiar with the relevant technologies of the present invention to implement according to the statements in this specification.

First of all, please refer to the first figure to the sixth figure, the bioautodegradable composite material and its production process of the present invention, the bioautodegradable composite material 10 includes: main raw material 10A and auxiliary raw material 10B, the main raw material 10A contains :

30~60% calcium carbonate 11, commonly known as limestone, limestone, stone powder, is a compound with the chemical formula CaCO3, which is alkaline. Calcium carbonate 11 is abundant on the earth and exists in many forms in rocks, minerals and Biological organisms, such as: aragonite, calcite, chalk, limestone, marble, travertine;

15~30% cellulose acetate 12, cellulose acetate 12 is also called cellulose acetate, cellulose acetate, is the acetate of cellulose, cellulose acetate 12 is obtained after the hydroxyl group in the cellulose molecule is esterified with acetate A chemically modified polymer compound;

10~20% Calcium Oxide 13, Calcium Oxide 13 is an inorganic compound, the chemical formula is CaO, commonly known as quicklime, Calcium Oxide is a basic oxide of 13, which can be obtained by calcining oyster shells at 1300 degrees;

1~5% talc powder 14, talc powder 14 is magnesium silicate mineral talc group talc, the main component is hydrous magnesium silicate, after being crushed, treated with hydrochloric acid, washed with water, and dried to increase toughness; and

1~2% Quartz 15, Quartz 15 is a mineral resource with very stable physical and chemical properties, and the crystal belongs to the oxide mineral of the trigonal crystal system. Quartz block is also known as silica.

The secondary raw material 10B comprises:

Antioxidants 16 Antioxidants 16 are molecules, usually reducing agents, such as thiols, ascorbic acid, polyphenols, that slow or prevent oxidation; and

Heat stabilizer 17, heat stabilizer 17 is used to improve polymer thermal stability.

Furthermore, the auxiliary raw material 10B may further contain natural degradants, so as to speed up the decomposition time of the bioautodegradable combined material 10 .

The production process of its bio-automatically degradable composite materials includes the following steps:

(a) The first raw material adding step S110 , adding the main raw material 10A into a mixer 1 .

(b) The first stirring and drying step S120, using the mixer 1 to stir and dry the main raw material 10A, the stirring speed is 500rpm~700rpm, and the drying temperature is 70~90 degrees.

(c) The first granulation step S130, putting the above-mentioned main raw material 10A after stirring and drying into a granulator 2 for the first granulation.

(d) The second raw material adding step S140 , adding the granulated material obtained from the first granulation together with the auxiliary raw material 10B into a mixer 1 .

(e) The second stirring and drying step S150, using the mixer 1 to stir and dry the granular material obtained by the first granulation and the auxiliary raw material 10B, the stirring speed is 500rpm~700rpm, and the drying The drying temperature is 70~90 degrees. (In addition, if it is necessary to accelerate the decomposition of the bioautodegradable composite material 10, a natural degradant can be added to speed up the decomposition time of the bioautodegradable composite material 10.)

(f) The second granulation step S160, the above-mentioned granules obtained by the first granulation after stirring and drying and the auxiliary raw material 10B are placed in a granulator 2 for the second granulation, The granular material obtained from the second granulation is the finished product of the bioautodegradable composite material 10 .

The bio-autodegradable composite material 10 can be used to injection mold an article with environmental protection and antibacterial effect, and the article can be any article.

By the structure of above-mentioned specific embodiment, can obtain following benefit:

The bio-automatically degradable composite material and its production process of the present invention, the composite material 10 can be injection-molded into an article with a predetermined shape, the article has the characteristics of automatic degradation, can be decomposed in the natural environment after being discarded, and has the effect of environmental protection and antibacterial. Moreover, the raw materials used in the composite material 10 are easy to obtain, the difficulty and cost of manufacture are reduced, and the manufactured articles are easy to preserve, and are not prone to embrittlement and cracking.

1: Blender 2: Granulator 10: Combined materials 10A: main raw material 10B: Sub-raw material 11: calcium carbonate 12: Cellulose acetate 13: calcium oxide 14: Talc powder 15: Quartz 16: Antioxidant 17: heat stabilizer S110: the first raw material addition step S120: the first stirring and drying step S130: the first granulation step S140: second raw material addition step S150: the second stirring and drying step S160: the second granulation step

The first figure is a block diagram of the process of the present invention. The second figure is the first schematic diagram of the production process of the present invention. The third figure is the second schematic diagram of the production process of the present invention. The fourth figure is the third schematic diagram of the production process of the present invention. The fifth figure is the fourth schematic diagram of the production process of the present invention. The sixth figure is a schematic diagram of the composite material of the present invention.

S110: the first raw material addition step

S120: the first stirring and drying step

S130: the first granulation step

S140: second raw material addition step

S150: the second stirring and drying step

S160: the second granulation step

Claims (9)

A bioautodegradable composite material, in the form of granules, containing main raw materials, the main raw materials include calcium carbonate, cellulose acetate, calcium oxide, talcum powder and quartz, the content of the calcium carbonate is greater than that of the cellulose acetate and the calcium oxide , the content of the talcum powder and the quartz. The bioautodegradable composite material as described in Claim 1, wherein the calcium carbonate accounts for 30-60%, the cellulose acetate accounts for 15-30%, the calcium oxide accounts for 10-20%, and the talc powder accounts for 1-5% %, the quartz accounts for 1~2%. The bioautodegradable composite material as described in Claim 1 further includes auxiliary raw materials, and the auxiliary raw materials include antioxidants and heat stabilizers. The bioautodegradable composite material as described in claim 3, wherein the auxiliary raw material further includes natural degradable factors. A production process for bio-automatically degradable composite materials, comprising the following steps: The first raw material addition step, adding main raw materials including calcium carbonate, cellulose acetate, calcium oxide, talcum powder and quartz into a mixer; In the first stirring and drying step, the main raw material is stirred and dried by using the mixer; In the first granulation step, the above-mentioned main raw materials after being stirred and dried are put into a granulator for the first granulation; In the second raw material addition step, the granules obtained by the first granulation together with the auxiliary raw materials including antioxidant and heat stabilizer are added into a mixer; The second stirring and drying step is to use the mixer to perform stirring and drying operations on the granular material obtained by the first granulation and the auxiliary raw material; In the second granulation step, the granules and auxiliary raw materials obtained by the first granulation after stirring and drying are placed in a granulator for the second granulation. The obtained granules are the finished products of bioautomatically degradable composite materials. The production process of bio-automatically degradable composite materials as described in Claim 5, wherein in the first stirring and drying step, the stirring speed is 500rpm~700rpm, and the drying temperature is 70~90 degrees. The production process of bio-autodegradable composite materials as described in Claim 5, wherein the second stirring and drying step has a stirring speed of 500rpm~700rpm, and a drying temperature of 70~90 degrees. The production process of bioautodegradable composite materials as described in Claim 5, wherein the main raw materials include calcium carbonate accounting for 30-60%, cellulose acetate accounting for 15-30%, calcium oxide accounting for 10-20%, and talcum powder accounting for 1% ~5% and quartz 1~2%. The production process of the bioautodegradable composite material as described in claim 5, wherein the auxiliary raw material contains natural degradable factors.

Images