TWI751027B - Molding method of fiber bag - Google Patents

Abstract

A method for forming a fiber bag body, which is made by mixing plant fiber powder, starch, natural binder, water-soluble polymer glue, modifier, modifier, slip agent, and opening agent to make 800-1600 meshes Plant fiber raw material pellets. After the raw material pellets are used to reduce the moisture contained in the raw material pellets by a hot dryer, the raw material pellets are mixed and heated into strips through a mixing chamber, and then the strips are extruded to a blow In the die head of the unit, a gas pressure source is used to deliver gas to the strip, and the strip is blown into a hollow bag.

Description

Forming method of fiber bag body

This creation belongs to a manufacturing method of a bag body, especially refers to a bag body molding method made of natural plant fiber, starch, etc. as raw materials.

Press, with the development of human science and technology civilization, modern human life is full of more and more plastic products. Cheap, lightweight and convenient plastics will undoubtedly make human life more and more convenient. However, plastic products cannot be decomposed naturally. And it often flows into the ocean with random discards, drifting around the world with ocean currents, causing all kinds of marine creatures to eat plastic and die, or get entangled in plastic products, resulting in restricted movement or inability to eat, not only Impact on marine ecology and harm human beings as they accumulate in the food chain. In order to improve the problem of the proliferation of plastic products, the applicant in this case previously created an invention patent for application No. 108102795, a biodegradable plant fiber raw material composition and its manufacturing method (hereinafter referred to as the conventional case), which disclosed a plant Raw material granules made of fiber, the ingredients of the raw granules do not require moisture at all, including: 40~60% of plant fiber powder, 20~30% of starch, 10~20% of starch fermented vegetable glue powder, 5 water-soluble polymer glue ~10%, and 3~5% cellulose protein. The main process is to adjust the proportion of the above formula according to the different manufacturing methods, and then rotate the fiber powder, starch and natural binder with a mixer for 10 to 40 minutes, and then use all the formulas. A fourth kneader comprehensively stirs and kneads the composite raw materials; then the composite raw materials are placed in a molding device to form a number of strips, and then a cutting unit is used to cut the strips into granules and after cooling, that is, Can be made into raw material pellets. The raw material particles disclosed in the conventional case use starch The powder is heated and gelatinized and mixed with vegetable gum to produce polymerizable bonded fiber powder. However, the vegetable gum in the conventional formula is only fermented by adding bacteria to starch, and it lacks a modification mechanism. At the same time, the added cellulose protein can only It is used to increase the unidirectional viscosity. When it is mixed with vegetable glue and starch and fiber powder after heating gelatinization, although it can achieve the effect of polymerization, this polymerization is only a false combination, and cannot make starch and fiber powder permanent. However, the ductility after kneading is limited, and it cannot be used as a raw material for the production of straws, bottles, cans or bags, and it is necessary to improve it.

In view of this, the creator of the author has conducted in-depth discussions on the above-mentioned conventional creation problems, and has actively sought solutions through years of experience in R&D and manufacturing in related industries. After long-term research and development, he has finally successfully developed this creation. "Forming method of fiber bag body" to improve the problem of conventional creation.

The main purpose of this creation is to provide a "forming method of a fiber bag body", which enables the bag or mulch to be made of fiber material, so that the bag body is environmentally friendly, and also has flexibility, strength and durability. and waterproof effect.

In order to achieve the above-mentioned creative purpose, this creation "the method of forming a fiber bag body", the process of which includes: A. Obtaining raw material grains, the raw material grains are plant fiber raw material grains with a mesh number of 800~1600 mesh, and the components include: plant fiber Powder 41~59%, starch 21~29%, natural binder 8~28%, the natural binder is made of starch added with dicarboxylic acid and bacteria for fermentation, water-soluble polymer glue 6~12%, modified 3~5% of natural agent, 0.5~3% of polypropylene amide, 0.01~0.2% of lubricating agent, and 0.01~0.1% of opening agent; B. Drying of raw material particles, placing the raw material particles in a hot drying machine for drying operation , in order to reduce the moisture contained in the raw material pellets; C. Mixing the material strips, placing the raw material pellets in the feeding barrel of an extrusion unit, and then mixing and heating the raw material pellets through the mixing chamber, and then exiting from one end. The material tube extrudes the material strip; D. Air blow molding, the material strip is moved to the die head of an air blowing unit, and gas is transported to the material strip by an air pressure source, and the material strip is blown into a bag body. The fiber bag body obtained by this process has a continuous hollow bag body structure, A complete bag can be obtained after one end is closed by means of thermocompression bonding, and then a complete bag can be obtained after cutting, or one side of the continuous hollow bag body can be cut and spread out, and then it can be used as a mulch film.

Regarding the techniques, means and effects used in this creation, a preferred embodiment is given and explained in detail in conjunction with the drawings. It is believed that the above-mentioned purpose, structure and characteristics of this creation can be used to gain an in-depth and specific understanding. .

(10): raw material pellets

(11): strips

(20): Hot Dryer

(30): Blow molding machine

(31): Extrusion unit

(32): Air blowing unit

(33): Feeding barrel

(34): mixing chamber

(35): Discharge pipe

(36): Die head

(361): Trachea

(362): Air pressure source

(363): Cooling air ring

(37): Extraction device

(371): Roller

(40): bag body

Fig. 1 is a schematic diagram of the manufacturing and molding steps of the fiber bag body of the present invention.

Figure 2: It is a combined plan view of the fiber bag body of the present invention being blow-molded by a blow-molding machine.

Please refer to FIG. 1 and FIG. 2 , the present invention "the method for forming a fiber bag body", which is to use a hot drying machine (20) and a blow molding machine (30) for the raw material pellets (10) made of plant fibers. The extrusion unit (31), the blowing unit (32) and other equipment are sequentially performed with the following steps: A. obtaining raw material pellets, B. drying the raw material pellets, C. mixing material strips, D. blowing molding, making The bag body (40) made of fibrous material can further be used to make the bag body (40) into a bag, mulch film or other articles, so as to reduce the damage of plastic products to the natural environment. The detailed process is as follows:

A. obtain raw material grain (10), this raw material grain (10) is the plant fiber powder 41～59%, starch 21～29%, natural adhesive 8～28%, this natural adhesive is added by starch dicarboxylic acid and Made of strains for fermentation, 6~12% of water-soluble polymer glue, 3~5% of modifier, 0.5~3% of polypropylene amide, 0.01~0.2% of lubricant, and 0.01~0.1% of opening agent, etc. After the raw materials are comprehensively kneaded, they are then made into 800-1600 mesh plant fiber raw material particles, wherein: the plant fiber powder is made of natural plant stems, barks, leaves or peels, etc. as fiber raw materials, which are crushed and dried. After treatment, it is processed into powder with a moisture content of less than 20%, and its particle size is about 100-200 mesh.

The starch is a high-molecular carbohydrate stored in plants. It can be decomposed into components such as glucose and maltose. It can be derived from the seeds of ginkgo, bamboo, wheat, potato, corn, sweet potato, cassava, lotus root, rice or algae, beans and other plants. (such as ginkgo, chestnut, peanut, pea, mung bean, red bean, etc.), fruit (such as wild oats, coix, etc.), stem (such as potato, konjac, pumpkin, etc.), leaves (such as honeysuckle), roots (such as sweet potato, cassava, etc.).

The natural binder is that when the starch is mixed with bacteria and dicarboxylic acid and fermented, the molecular structure of the starch will be modified, and the original starch will not have too much polymerization viscosity after heating and gelatinization, and the starch molecules will be changed to make it It is easy to approach polymerization and greatly increase its cohesive force, and can polymerize starch and plant fiber powder for a long time. In addition, the starch used can be derived from the seeds, fruits, roots, stems, and leaves of plants such as wheat, potato, corn, sweet potato, cassava, lotus root, rice, or algae. The added dicarboxylic acid refers to an organic compound containing two carboxyl functional groups, which can be oxalic acid, glutaric acid, suberic acid, azelaic acid, sebacic acid or undecanedioic acid. And the strains used for fermentation can be koji bacteria or yeast or lactic acid bacteria or acetic acid bacteria. After the above-mentioned ingredients are mixed and fermented, they are dried and ground into powder, which is convenient for future preservation and use.

The water-soluble polymer glue is used to adjust the viscosity of vegetable glue, which can be extracted from natural plant raw materials, such as starch, cellulose or vegetable glue, and can also be chemically modified natural polymers, such as carboxymethyl starch, acetic acid starch. Or it can also be a synthetic polymer, and there are two types of polymer resins and condensation resins, such as polyacrylamide (PAM), hydrolyzed polyacrylamide (HPAM), polyvinylpyrrolidone (PVP), etc. are applicable.

The modifier can be a coupling agent, and is a multifunctional coupling agent. Through chemical reaction, it acts as a bridge between organic substances and inorganic substances, and can increase the natural binder polymerized starch and plant fiber powder. The strength, toughness and multi-directional viscosity of bonding.

The opening agent can be silicon dioxide, so that the finished bag body will not stick together; and the polypropylene amide is used to improve the number of bonds between starch and fibers and improve the polymerization effect. And the lubricant can be primary amide, secondary amide or ethylene distearate amide, used to increase Add the lubricity of these raw materials during mixing and processing.

B. Drying the raw material grains, placing the raw material grains (10) in the hot drying machine (20) for drying operation, so as to reduce the moisture contained in the raw material grains (10) to less than 2/1000.

C. Kneading the material strip (11), placing the raw material pellets (10) in the feeding barrel (33) on one side of the extrusion unit (31), and then passing the raw material pellets through the mixing chamber (34) in the middle section (10) After heating and kneading in three stages, the material strip (11) is extruded from the discharge pipe (35) on the other side. It is further explained that the mixing chamber (34) is heated in three stages. The heating temperature of the first stage is 120~140°C, the heating temperature of the second stage is 145~155°C, and the heating temperature of the third stage is 160~180°C.

D. Blow molding, the discharge pipe (35) on one side of the extrusion unit (31) is connected with the blowing unit (32), so that the material strip (11) can be extruded and moved to the blowing unit In the die head (36) of (32), a gas pipe (361) is appropriately connected to the die head (36), and the gas pipe (361) conveys the gas supplied by a gas pressure source (362) to the die head (36). ) inside, to blow the material strip (11) into a bag body (40). The outlet of the sack rises, and the bag body (40) is cooled by guiding the gas through the cooling air ring (363) above the die head (36).

The cooled bag body (40) is then gradually folded into a flat shape through the drawing device (37) above the air blowing unit (32), and then the folded bag body (40) is clamped by the roller (371) and assembled. By pulling it backwards, the user can close one end of the continuous hollow bag body (40) by means of thermocompression bonding at an appropriate place, and then cut it to obtain a finished bag, or the continuous hollow bag body (40) After one side is cut and spread out, it can be used as a mulch.

The equipment such as the above-mentioned thermal drying machine (20), blow molding machine (30), extrusion unit (31), air blowing unit (32) and extraction device (37) are known machines and equipment, and will not be described in detail. Using raw material pellets (10) made of plant fibers as raw materials, the manufacturing process of existing machinery and equipment is improved. The type method can produce a bag body (40) that is environmentally friendly, has good durability, good strength, high durability, and good waterproof effect.

To sum up, this creation has excellent progress and practicability among similar products. At the same time, I have searched domestic and foreign technical materials and literatures about such structures and have not found that the same structure exists before. The creation has already met the requirements for a new type of patent, and an application can be filed in accordance with the law.

The above-mentioned embodiments are only used to illustrate the present creation, according to which, without departing from the scope of the spirit of the present creation, various deformations, modifications and applications made by those skilled in the art should be included in the scope of the present creation.

(10): raw material pellets

(11): strips

(20): Hot Dryer

(30): Blow molding machine

(31): Extrusion unit

(32): Air blowing unit

(33): Feeding barrel

(34): mixing chamber

(35): Discharge pipe

(36): Die head

(361): Trachea

(40): bag body

Claims (9)

A method for forming a fiber bag body, the process of which includes: A. Obtaining raw material grains, the raw material grains are plant fiber raw material grains with a mesh number of 800-1600 mesh, and the components include: plant fiber powder 41-59%, starch 21-29% , 8~28% of natural binder, the natural binder is made of starch added with dicarboxylic acid and bacteria for fermentation, 6~12% of water-soluble polymer glue, 3~5% of modifier, polypropylene amide 0.5~3%, lubricating agent 0.01~0.2%, and opening agent 0.01~0.1%; B. The raw material grains are dried, and the raw material grains are placed in a hot dryer for drying to reduce the moisture contained in the raw material grains; C . To knead the material strip, place the raw material pellets in the feeding barrel of an extrusion unit, and then mix and heat the raw material pellets through the mixing chamber, and then extrude the material strips from the discharge pipe at one end; D. Blow In air forming, the material strip is moved into a die head of an air blowing unit, and gas is delivered to the material strip by an air pressure source, and the material strip is blown into a bag body. According to the method for forming a fiber bag body described in item 1 of the scope of the patent application, wherein the plant fiber powder can be made of stems, barks, leaves or peels of natural plants as fiber raw materials, and after crushing and drying, it is processed into water-containing materials. Powder with a rate of less than 20%. According to the method for forming a fiber bag body according to the first item of the claimed scope, the starch can be derived from bamboo, wheat, potato, corn, sweet potato, cassava, lotus root, rice or algae. According to the method for forming the fiber bag body described in the first item of the claimed scope, the natural binder can be dried and made into powder, and the bacteria can be koji bacteria, yeast bacteria, lactic acid bacteria or acetic acid bacteria. According to the method for forming a fiber bag body described in the first item of the scope of the application, when the raw material particles are mixed and heated in the mixing chamber, the mixing process can be divided into three stages of heating, and the heating temperature of the first stage is 120 °C. ~140℃, the heating temperature of the second stage is 145~155℃, the third stage The heating temperature is 160~180℃. According to the method for forming a fiber bag body according to the first item of the claimed scope, the water-soluble polymer glue can be a chemically modified natural polymer, and the chemically modified natural polymer can be carboxymethyl starch or starch acetate. According to the method for forming a fiber bag body as described in the first item of the claimed scope, wherein the opening agent can be silicon dioxide. According to the method for forming a fiber bag body according to the first item of the claimed scope, the slip agent can be primary amide, secondary amide or ethylene distearate amide. According to the method for forming a fiber bag body described in item 1 of the claimed scope, the modifier can be a coupling agent.

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