阅读说明：本技术 一种复合植物纤维生物可降解材料的制备方法 (Preparation method of composite plant fiber biodegradable material ) 是由 代彦霞 于 2021-01-13 设计创作，主要内容包括：本发明公开了一种复合植物纤维生物可降解材料的制备方法,涉及复合可降解材料领域,一种复合植物纤维生物可降解材料,该复合植物纤维生物可降解材料由以下重量份数的成分组成：淀粉：35-60份、甘油：13-18份、棉麻纤维：25-50份、安息香乙醚：13-18份、邻苯二甲酸二乙酯：5-15份、助剂：1-5份和抗氧剂：0.4-3份,本发明以淀粉、甘油、棉麻纤维、安息香乙醚、邻苯二甲酸二乙酯、助剂和抗氧剂作为制备复合植物纤维生物可降解材料的原料,制备的复合植物纤维生物可降解材料密度小、拉伸强度小和冲击强度大,利于实际使用,同时降解速度快,此外,制备方法简单,利于企业生产。(The invention discloses a preparation method of a composite plant fiber biodegradable material, which relates to the field of composite degradable materials, and the composite plant fiber biodegradable material is composed of the following components in parts by weight: starch: 35-60 parts of glycerol: 13-18 parts of cotton and linen fibers: 25-50 parts of benzoin ethyl ether: 13-18 parts of diethyl phthalate: 5-15 parts of auxiliary agent: 1-5 parts of antioxidant: 0.4-3 parts of starch, glycerol, cotton-flax fiber, benzoin ethyl ether, diethyl phthalate, an auxiliary agent and an antioxidant are used as raw materials for preparing the composite plant fiber biodegradable material, and the prepared composite plant fiber biodegradable material is small in density, small in tensile strength and high in impact strength, is beneficial to practical use and high in degradation speed, and is simple in preparation method and beneficial to enterprise production.)

1. A composite plant fiber biodegradable material is characterized in that: the composite plant fiber biodegradable material comprises the following components in parts by weight: starch: 35-60 parts of glycerol: 13-18 parts of cotton and linen fibers: 25-50 parts of benzoin ethyl ether: 13-18 parts of diethyl phthalate: 5-15 parts of auxiliary agent: 1-5 parts of antioxidant: 0.4-3 parts.

2. The method for preparing the composite plant fiber biodegradable material according to claim 1, wherein the method comprises the following steps: the preparation method comprises the following steps:

firstly, cutting the cotton and hemp fibers into short fibers with the diameter of 8-12mm, adding 0.1 percent of cellulase and 0.2 percent of pectinase at 40-45 ℃, adding water, adjusting the pH value of a mixed solution to 6.2-7.6, carrying out enzymolysis reaction for 12-15min, and carrying out alkali treatment to obtain the pretreated cotton and hemp fibers;

step two, taking starch according to parts by weight: 35-60 parts of glycerol: 13-18 parts of pretreated cotton and hemp fibers: 25-50 parts of benzoin ethyl ether: 13-18 parts of diethyl phthalate: 5-15 parts of auxiliary agent: 1-5 parts of antioxidant: 0.4-3 parts for later use;

step three, melting and blending the weighed raw materials on an open mill for 12-16min at the temperature of 160-180 ℃;

and step four, preheating the milled melt blend on a flat vulcanizing machine, exhausting, maintaining the pressure for 5-7min, forming at the temperature of 150-.

3. The preparation device of composite plant fiber biodegradable material according to claim 1, comprising a box body (1) and a cover plate (2), characterized in that: the bottom of the box body (1) is fixedly connected with a cover plate (2) through uniformly connected bolts, the top of the cover plate (2) is fixedly connected with a crushing structure (3) for cutting cotton and linen fibers, the crushing structure (3) comprises a rotating shaft (301), a first bevel gear (302), a second bevel gear (303), a crankshaft (304), a first driving motor (305), a fixed blade (306) and a rotating blade (307), the output end of the first driving motor (305) is fixedly connected with the rotating shaft (301), the rotating shaft (301) is fixedly connected with the first bevel gear (302), the first bevel gear (302) is engaged and connected with the second bevel gear (303), the crankshaft (304) of two groups of connecting rod journals is fixedly connected in a straight hole of the second bevel gear (303), and the upright part of the crankshaft (304) is uniformly and fixedly connected with the rotating blade (307) for cutting, the inner wall of the box body (1) is uniformly and fixedly connected with a fixed blade (306) matched with the rotating blade (307) for use;

the cotton and linen fiber rolling and cutting device is characterized in that a rolling and cutting structure (4) for rolling and cutting cotton and linen fibers is connected to a connecting rod journal of the crankshaft (304), the rolling and cutting structure (4) comprises a rolling cutter (401), a first movable plate (402), a feeding cylinder (403), a rolling cutter mounting plate (404), a first connecting transverse plate (405), a second movable plate (406), a second connecting transverse plate (407), a straight baffle plate (408) and a transverse groove (409), the crankshaft (304) is movably connected with the first movable plate (402) and the second movable plate (406), the first movable plate (402) is arranged at the top of the cover plate (2), the second movable plate (406) is arranged at the bottom of the cover plate (2), the top of the first movable plate (402) is rotatably connected with the first connecting transverse plate (405) through a fixedly connected rotating shaft, and the rolling cutter mounting plate (404) is fixedly connected to the right end of the first connecting transverse plate (405, the right side wall of the rolling cutter mounting plate (404) is uniformly and fixedly connected with a rolling cutter (401) for rolling cutting, the left end of the top of the second movable plate (406) is rotatably connected with a second connecting transverse plate (407) through a fixedly connected rotating shaft, the right end of the second connecting transverse plate (407) is fixedly connected with a straight baffle (408) for blocking cotton and linen fibers from falling downwards, the left side wall of the feeding barrel (403) is uniformly provided with a transverse groove (409), and the straight baffle (408) and the rolling cutter (401) are attached to and slidably connected with the transverse groove (409) of the feeding barrel (403);

the bottom of the box body (1) is fixedly connected with a second discharge pipe (6), the second discharge pipe (6) is connected with a screening structure (7) for screening, the screening structure (7) comprises a third driving motor (701), a second mounting frame (702), a third discharge pipe (703), a screening plate (704) and a screening cylinder (705), the top of the sieving cylinder (705) is fixedly connected with the bottom of the second discharge pipe (6), the rear side wall of the screening cylinder (705) is fixedly connected with a second mounting rack (702), a third driving motor (701) is fixedly connected in the second mounting rack (702), the output end of the third driving motor (701) is fixedly connected with a screening plate (704), the screening plate (704) is in fit sliding connection with the inner wall of the screening cylinder (705), and the bottom of the screening cylinder (705) is fixedly connected with a third discharging pipe (703) for discharging;

the screening cylinder (705) is connected with a circulating structure (5) for material circulation, the circulating structure (5) comprises a collecting hopper (501), a material guiding inclined pipe (502), a first mounting frame (503), a second driving motor (504), a first discharging pipe (505), a straight cylinder (506), an auger (507), an arc-shaped baffle (508) and a discharging inclined hole (509), the right end of the screening plate (704) is fixedly connected with the arc-shaped baffle (508) which is jointed with the inner wall of the screening cylinder (705) in a sliding manner, the middle lower end of the outer wall of the screening cylinder (705) is provided with the discharging inclined hole (509), the screening cylinder (705) is fixedly connected with the collecting hopper (501) at the discharging inclined hole (509), the bottom of the collecting hopper (501) is fixedly connected with the material guiding inclined pipe (502), the bottom of the material guiding inclined pipe (502) is fixedly connected with the straight cylinder (506), the bottom of the straight cylinder (506) is fixedly connected with the first mounting frame (503), first mounting bracket (503) fixedly connected with second driving motor (504), output fixedly connected with auger (507) of second driving motor (504), straight section of thick bamboo (506) rotate with auger (507) through fixed connection's bearing and are connected, the top lateral wall left end of straight section of thick bamboo (506) highly is connected with first discharging pipe (505), and first discharging pipe (505) set up the top of a feeding section of thick bamboo (403).

4. The device for preparing the composite plant fiber biodegradable material according to claim 3, wherein: the first driving motor (305) is fixedly installed at the top of the box body (1), and the box body (1) is rotatably connected with the crankshaft (304) through a bearing fixedly connected with the box body.

5. The device for preparing the composite plant fiber biodegradable material according to claim 3, wherein: the feeding cylinder (403) is fixedly arranged in a straight groove of the cover plate (2).

6. The device for preparing the composite plant fiber biodegradable material according to claim 4, wherein: the crankshaft (304) is rotatably connected with a first movable plate (402) and a second movable plate (406) through a bearing fixedly connected.

7. The device for preparing the composite plant fiber biodegradable material according to claim 5, wherein: the distance between the adjacent rolling cutters (401) is 12-15 mm.

8. The device for preparing the composite plant fiber biodegradable material according to claim 3, wherein: the screening cylinder (705) is rotationally connected with the screening plate (704) through a bearing fixedly connected with the screening cylinder, and the axis of the third driving motor (701) is coincident with the axis of the screening cylinder (705).

9. The device for preparing the composite plant fiber biodegradable material according to claim 3, wherein: the discharge inclined hole (509) is arranged at the upper end of the third discharge pipe (703).

10. The device for preparing the composite plant fiber biodegradable material according to claim 9, wherein: during screening board (704) drive cowl (508) and rotate, cowl (508) are stopped up ejection of compact inclined hole (509), and screening board (704) drive cowl (508) when screening is finished the top be less than the bottom of ejection of compact inclined hole (509), and the top material of screening board (704) passes through ejection of compact inclined hole (509) and gets into in collecting hopper (501).

Technical Field

The invention relates to the field of composite degradable materials, in particular to a preparation method of a composite plant fiber biodegradable material.

Background

Biodegradable polymers can generally be divided into two broad categories, natural and synthetic. In the synthesis of degradable polymers, polylactic acid, polyglycolic acid, poly-3-hydroxybutyrate, copolyester, polylactic acid-polyethylene glycol block copolymer, and the like are mainly used. Among them, polylactic acid (PLA) is the most promising new green polymer material with outstanding comprehensive properties. The polylactic acid has wide sources of production raw materials, does not depend on petroleum resources, has good biodegradability, and the degraded products are carbon dioxide, water and other small molecular substances and can be repeatedly utilized by the nature, so the polylactic acid is a green environment-friendly high polymer material which accords with the circular economy. However, the share of polylactic acid in the market is only a small part, and the polylactic acid cannot be generally used, mainly because the polylactic acid has higher production cost, complex production process and long production flow, and has slightly poor mechanical properties compared with the traditional petroleum-based polymer material. Plant fibers are widely distributed in nature and are mainly extracted from various parts of plants and crops through post-processing treatment.

The existing biodegradable polymer has the defects of high density and limited tensile strength and impact strength, a cutting device for raw materials has poor cutting effect during cutting, and meanwhile, a circulating structure is not designed, so that the material utilization rate is caused.

Therefore, a method for preparing a composite plant fiber biodegradable material is provided to solve the above problems.

Disclosure of Invention

The invention aims to provide a preparation method of a composite plant fiber biodegradable material, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a composite plant fiber biodegradable material is composed of the following components in parts by weight: starch: 35-60 parts of glycerol: 13-18 parts of cotton and linen fibers: 25-50 parts of benzoin ethyl ether: 13-18 parts of diethyl phthalate: 5-15 parts of auxiliary agent: 1-5 parts of antioxidant: 0.4-3 parts.

A preparation method of a composite plant fiber biodegradable material comprises the following steps:

firstly, cutting the cotton and hemp fibers into short fibers with the diameter of 8-12mm, adding 0.1 percent of cellulase and 0.2 percent of pectinase at 40-45 ℃, adding water, adjusting the pH value of a mixed solution to 6.2-7.6, carrying out enzymolysis reaction for 12-15min, and carrying out alkali treatment to obtain the pretreated cotton and hemp fibers;

step two, taking starch according to parts by weight: 35-60 parts of glycerol: 13-18 parts of pretreated cotton and hemp fibers: 25-50 parts of benzoin ethyl ether: 13-18 parts of diethyl phthalate: 5-15 parts of auxiliary agent: 1-5 parts of antioxidant: 0.4-3 parts for later use;

step three, melting and blending the weighed raw materials on an open mill for 12-16min at the temperature of 160-180 ℃;

and step four, preheating the milled melt blend on a flat vulcanizing machine, exhausting, maintaining the pressure for 5-7min, forming at the temperature of 150-.

A preparation device of composite plant fiber biodegradable material comprises a box body and a cover plate, wherein the bottom of the box body is fixedly connected with the cover plate through uniformly connected bolts, the top of the cover plate is fixedly connected with a crushing structure for cutting cotton and hemp fibers, the crushing structure comprises a rotating shaft, a first bevel gear, a second bevel gear, a crankshaft, a first driving motor, a fixed blade and a rotating blade, the output end of the first driving motor is fixedly connected with a rotating shaft which is fixedly connected with a first bevel gear, the first bevel gear is engaged with a second bevel gear, a crankshaft of two groups of connecting rod journals is fixedly connected in a straight hole of the second bevel gear, the vertical part of the crankshaft is uniformly and fixedly connected with a rotating blade for cutting off, and the inner wall of the box body is uniformly and fixedly connected with a fixed blade matched with the rotating blade for use;

the connecting rod shaft neck of the crankshaft is connected with a rolling and cutting structure for cotton and linen fiber rolling and cutting, the rolling and cutting structure comprises a rolling and cutting knife, a first movable plate, a feeding cylinder, a rolling and cutting knife mounting plate, a first connecting transverse plate, a second movable plate, a second connecting transverse plate, a straight baffle plate and a transverse groove, the crankshaft is movably connected with the first movable plate and the second movable plate, the first movable plate is arranged at the top of a cover plate, the second movable plate is arranged at the bottom of the cover plate, the top of the first movable plate is rotatably connected with the first connecting transverse plate through a fixedly connected rotating shaft, the right end of the first connecting transverse plate is fixedly connected with the rolling and cutting knife mounting plate, the right side wall of the rolling and cutting knife mounting plate is uniformly and fixedly connected with the rolling and cutting knife for rolling and cutting, the left end of the top of the second movable plate is rotatably connected with the second connecting transverse plate through a fixedly connected rotating shaft, and the right end of the second connecting transverse plate is, the left side wall of the feeding cylinder is uniformly provided with transverse grooves, and the straight baffle and the rolling cutter are in fit sliding connection with the transverse grooves of the feeding cylinder;

the bottom of the box body is fixedly connected with a second discharging pipe, the second discharging pipe is connected with a screening structure for screening, the screening structure comprises a third driving motor, a second mounting frame, a third discharging pipe, a screening plate and a screening cylinder, the top of the screening cylinder is fixedly connected with the bottom of the second discharging pipe, the rear side wall of the screening cylinder is fixedly connected with the second mounting frame, the third driving motor is fixedly connected into the second mounting frame, the output end of the third driving motor is fixedly connected with the screening plate, the screening plate is in fit sliding connection with the inner wall of the screening cylinder, and the bottom of the screening cylinder is fixedly connected with a third discharging pipe for discharging;

the screening cylinder is connected with a circulating structure for material circulation, the circulating structure comprises a collecting hopper, a material guiding inclined pipe, a first mounting frame, a second driving motor, a first discharging pipe, a straight cylinder, an auger, an arc baffle plate and a material discharging inclined hole, the right end of the screening plate is fixedly connected with the arc baffle plate which is in fit sliding connection with the inner wall of the screening cylinder, the material discharging inclined hole is formed in the lower end of the outer wall of the screening cylinder, the collecting hopper is fixedly connected with the screening cylinder at the material discharging inclined hole, the material guiding inclined pipe is fixedly connected with the bottom of the collecting hopper, the straight cylinder is fixedly connected with the bottom of the material guiding inclined pipe, the first mounting frame is fixedly connected with the bottom of the straight cylinder, the second driving motor is fixedly connected with the first mounting frame, the auger is fixedly connected with the output end of the second driving motor, and the straight cylinder is rotatably connected with the auger through, the left end of the side wall of the top of the straight cylinder is highly connected with a first discharging pipe, and the first discharging pipe is arranged at the top of the feeding cylinder.

Furthermore, the first driving motor is fixedly installed at the top of the box body, and the box body is rotatably connected with the crankshaft through a bearing fixedly connected with the box body.

Furthermore, the feeding cylinder is fixedly arranged in the straight groove of the cover plate.

Furthermore, the crankshaft is rotatably connected with a first movable plate and a second movable plate through a bearing fixedly connected.

Furthermore, the distance between the adjacent rolling cutters is 12-15 mm.

Furthermore, the screening cylinder is rotatably connected with the screening plate through a bearing fixedly connected with the screening cylinder, and the axis of the third driving motor coincides with the axis of the screening cylinder.

Furthermore, the discharge inclined hole is formed in the upper end of the third discharge pipe.

Furthermore, during screening, the screening plate drives the arc-shaped baffle to rotate, the arc-shaped baffle blocks the discharge inclined hole, the top of the screening plate, which drives the arc-shaped baffle, is lower than the bottom of the discharge inclined hole when screening is finished, and materials at the top of the screening plate enter the material collecting hopper through the discharge inclined hole.

The invention has the beneficial effects that:

the invention provides a preparation method of a composite plant fiber biodegradable material, a first driving motor of a crushing structure drives a rotating shaft to rotate, the rotating shaft drives a first bevel gear to rotate, the first bevel gear drives a second bevel gear to rotate, the second bevel gear drives a crankshaft to rotate, a connecting rod journal of the crankshaft respectively drives a first movable plate and a second movable plate of a rolling and cutting structure to move, the first movable plate drives a first connecting transverse plate to move back and forth, the first connecting transverse plate drives a rolling cutter to move back and forth, the rolling cutter rolls and cuts materials in a feeding cylinder back and forth to realize the rolling and cutting treatment of cotton and linen fibers, the second movable plate drives a second connecting transverse plate to move back and forth, the second connecting transverse plate drives a straight baffle plate to move back and forth, the straight baffle plate intermittently feeds the cotton and linen fibers which are rolled and cut in the feeding cylinder, the retention time of the cotton and linen fibers in the feeding cylinder is improved, and the rolling cutter is beneficial to, the rolling cutting effect is improved, the later-stage cutting effect is reduced, and the cotton and linen fiber cutting speed is increased;

according to the preparation method of the composite plant fiber biodegradable material, the third driving motor of the screening structure drives the screening plate to rotate back and forth in the screening cylinder, the screening plate drives the cut cotton and linen fibers to shake, the shaken cotton and linen fibers are beneficial to screening of the screening plate, and the screening effect is improved.

After screening is finished, the screening plate drives the circular arc-shaped baffle plate to move to the bottom of the discharge inclined hole, cotton and hemp fibers which do not pass through the screening plate enter the discharge inclined hole through self gravity, then enter the straight cylinder through the collecting hopper and the guide inclined pipe, the second driving motor drives the packing auger to rotate, the packing auger drives the cotton and hemp fibers which do not pass through the screening plate to enter the first discharge pipe, then the cotton and hemp fibers are rolled and cut again in the feed cylinder, and finally the cotton and hemp fibers enter the box body to be cut again, so that the maximum cutting of the cotton and hemp fibers into standard length is realized, and the full utilization of materials is facilitated.

According to the preparation method of the composite plant fiber biodegradable material, the starch, the glycerol, the cotton-flax fiber, the benzoin ethyl ether, the diethyl phthalate, the auxiliary agent and the antioxidant are used as raw materials for preparing the composite plant fiber biodegradable material, and the prepared composite plant fiber biodegradable material is small in density, small in tensile strength and large in impact strength, is beneficial to practical use and high in degradation speed, and is simple in preparation method and beneficial to enterprise production.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flow chart of a preparation method of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a rear view of the structure of the present invention;

FIG. 4 is a rear bottom view of the present invention construction;

FIG. 5 is a cross-sectional view of the structure of the present invention;

FIG. 6 is a bottom view in cross-section of the structure of the present invention;

FIG. 7 is a left side view of the first movable plate and the connecting structure thereof according to the present invention;

FIG. 8 is a schematic view of a first movable plate and a connecting structure thereof according to the present invention;

FIG. 9 is an enlarged view of the structure at A of FIG. 3 according to the present invention;

FIG. 10 is an enlarged view of the structure at B of FIG. 5 according to the present invention;

FIG. 11 is an enlarged view of the structure of FIG. 6 at C according to the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

1. the box body 2, the cover plate 3, the crushing structure 301, the rotating shaft 302, the first bevel gear 303, the second bevel gear 304, the crankshaft 305, the first driving motor 306, the fixed blade 307, the rotating blade 4, the rolling structure 401, the rolling cutter 402, the first movable plate 403, the feeding cylinder 404, the rolling cutter mounting plate 405, the first connecting transverse plate 406, the second movable plate 407, the second connecting transverse plate 408, the straight baffle 409, the transverse groove 5, the circulating structure 501, the collecting hopper 502, the material guiding inclined pipe 503, the first mounting frame 504, the second driving motor 505, the first discharging pipe 506, the straight cylinder 507, the packing auger 508, the arc baffle 509, the discharging inclined hole 6, the second discharging pipe 7, the screening structure 701, the third driving motor 702, the second mounting frame 703, the third discharging pipe 704, the screening cylinder 705.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention will be further described with reference to the following examples.

Example 1

As shown in fig. 1, a composite plant fiber biodegradable material is composed of the following components in parts by weight: starch: 35-60 parts of glycerol: 13-18 parts of cotton and linen fibers: 25-50 parts of benzoin ethyl ether: 13-18 parts of diethyl phthalate: 5-15 parts of auxiliary agent: 1-5 parts of antioxidant: 0.4-3 parts.

A preparation method of a composite plant fiber biodegradable material comprises the following steps:

firstly, cutting the cotton and hemp fibers into short fibers with the diameter of 8-12mm, adding 0.1 percent of cellulase and 0.2 percent of pectinase at 40-45 ℃, adding water, adjusting the pH value of a mixed solution to 6.2-7.6, carrying out enzymolysis reaction for 12-15min, and carrying out alkali treatment to obtain the pretreated cotton and hemp fibers;

step two, taking starch according to parts by weight: 35-60 parts of glycerol: 13-18 parts of pretreated cotton and hemp fibers: 25-50 parts of benzoin ethyl ether: 13-18 parts of diethyl phthalate: 5-15 parts of auxiliary agent: 1-5 parts of antioxidant: 0.4-3 parts for later use;

step three, melting and blending the weighed raw materials on an open mill for 12-16min at the temperature of 160-180 ℃;

step four, preheating the milled melt blend on a flat vulcanizing machine, exhausting, maintaining the pressure for 5-7min, forming at the temperature of 150-;

the starch, the glycerol, the cotton-flax fiber, the benzoin ethyl ether, the diethyl phthalate, the auxiliary agent and the antioxidant are used as raw materials for preparing the composite plant fiber biodegradable material, and the prepared composite plant fiber biodegradable material is small in density, small in tensile strength and large in impact strength, is beneficial to practical use, is high in degradation speed, is simple in preparation method and is beneficial to enterprise production.

Example 2

Example 2 is a further modification to example 1.

As shown in fig. 2, 3, 4, 5, 6, 8, 9 and 10, the device for preparing a composite plant fiber biodegradable material comprises a box 1 and a cover plate 2, wherein the bottom of the box 1 is fixedly connected with the cover plate 2 through uniformly connected bolts, the top of the cover plate 2 is fixedly connected with a crushing structure 3 for cutting cotton and hemp fibers, the crushing structure 3 comprises a rotating shaft 301, a first bevel gear 302, a second bevel gear 303, a crankshaft 304, a first driving motor 305, a fixed blade 306 and a rotating blade 307, the output end of the first driving motor 305 is fixedly connected with the rotating shaft 301, the rotating shaft 301 is fixedly connected with the first bevel gear 302, the first bevel gear 302 is engaged with the second bevel gear 303, the crankshaft 304 with two groups of connecting rod journals is fixedly connected in a straight hole of the second bevel gear 303, the upright part of the crankshaft 304 is uniformly and fixedly connected with the rotating blade 307 for, the inner wall of the box body 1 is uniformly and fixedly connected with a fixed blade 306 matched with a rotating blade 307 for use, a first driving motor 305 is fixedly arranged at the top of the box body 1, and the box body 1 is rotatably connected with a crankshaft 304 through a bearing which is fixedly connected;

the connecting rod shaft neck of the crankshaft 304 is connected with a rolling and cutting structure 4 for cotton and linen fiber rolling and cutting, the rolling and cutting structure 4 comprises a rolling and cutting knife 401, a first movable plate 402, a feeding cylinder 403, a rolling and cutting knife mounting plate 404, a first connecting transverse plate 405, a second movable plate 406, a second connecting transverse plate 407, a straight baffle 408 and a transverse groove 409, the crankshaft 304 is movably connected with the first movable plate 402 and the second movable plate 406, the first movable plate 402 is arranged at the top of the cover plate 2, the second movable plate 406 is arranged at the bottom of the cover plate 2, the top of the first movable plate 402 is rotatably connected with the first connecting transverse plate 405 through a fixedly connected rotating shaft, the right end of the first connecting transverse plate 405 is fixedly connected with the rolling and cutting knife mounting plate 404, the right side wall of the rolling and cutting knife mounting plate 404 is uniformly and fixedly connected with the rolling and cutting knife 401 for rolling and cutting, the distance between the adjacent rolling and cutting knives 401 is 12-15mm, the left end of the top of the second, a straight baffle 408 for preventing the cotton and linen fibers from falling downwards is fixedly connected to the right end of the second connecting transverse plate 407, transverse grooves 409 are uniformly formed in the left side wall of the feeding cylinder 403, the straight baffle 408 and the rolling cutter 401 are in fit sliding connection with the transverse grooves 409 of the feeding cylinder 403, the feeding cylinder 403 is fixedly installed in the straight grooves of the cover plate 2, the crankshaft 304 is rotatably connected with a first movable plate 402 and a second movable plate 406 through fixedly connected bearings, the rotating shaft 301 is driven to rotate by the first driving motor 305 of the crushing structure 3, the first bevel gear 302 is driven to rotate by the rotating shaft 301, the second bevel gear 303 is driven to rotate by the first bevel gear 302, the crankshaft 304 is driven to rotate by the second bevel gear 303, a connecting rod journal of the crankshaft 304 respectively drives the first movable plate 402 and the second movable plate 406 of the rolling cutting structure 4 to move, the first movable plate 402 drives the first connecting transverse plate 405 to move back and forth, the first connecting transverse, the rolling cutter 401 performs back-and-forth rolling cutting on the material in the feeding cylinder 403 to realize the rolling cutting treatment on the cotton and linen fibers, the second movable plate 406 drives the second connecting transverse plate 407 to move back and forth, the second connecting transverse plate 407 drives the straight baffle 408 to move back and forth, the straight baffle 408 intermittently performs blanking on the cotton and linen fibers rolled and cut in the feeding cylinder 403, the retention time of the cotton and linen fibers in the feeding cylinder 403 is prolonged, the rolling cutter 401 is favorably lifted to perform multiple rolling cutting, the rolling cutting effect is improved, the later shearing effect is reduced, and the cutting speed of the cotton and linen fibers is increased;

the bottom of the box body 1 is fixedly connected with a second discharge pipe 6, the second discharge pipe 6 is connected with a screening structure 7 for screening, the screening structure 7 comprises a third driving motor 701, a second mounting frame 702, a third discharge pipe 703, a screening plate 704 and a screening cylinder 705, the top of the screening cylinder 705 is fixedly connected with the bottom of the second discharge pipe 6, the rear side wall of the screening cylinder 705 is fixedly connected with the second mounting frame 702, the third driving motor 701 is fixedly connected in the second mounting frame 702, the output end of the third driving motor 701 is fixedly connected with the screening plate 704, the screening plate 704 is in fit sliding connection with the inner wall of the screening cylinder 705, the bottom of the screening cylinder 705 is fixedly connected with the third discharge pipe 703 for blanking, the screening cylinder 705 is in rotary connection with the screening plate 704 through a bearing fixedly connected with the screening plate 701, and the axis of the third driving motor 701 coincides with the axis of the screening cylinder 705, the third driving motor 701 of the screening structure 7 drives the screening plate 704 to rotate back and forth in the screening cylinder 705, the screening plate 704 drives the cut cotton and linen fibers to shake, the shaken cotton and linen fibers are beneficial to screening of the screening plate 704, and the screening effect is improved.

Example 3

Example 3 is a further modification to example 1.

As shown in fig. 2, 3, 5, 6, 7, and 11, the sieving cylinder 705 is connected to a circulation structure 5 for material circulation, the circulation structure 5 includes a material collecting hopper 501, a material guiding inclined tube 502, a first mounting frame 503, a second driving motor 504, a first discharging tube 505, a straight tube 506, an auger 507, an arc-shaped baffle 508 and a discharging inclined hole 509, the right end of the sieving plate 704 is fixedly connected to the arc-shaped baffle 508 which is in sliding connection with the inner wall of the sieving cylinder 705, the middle lower end of the outer wall of the sieving cylinder 705 is provided with the discharging inclined hole 509, the sieving cylinder 705 is fixedly connected to the material collecting hopper 501 at the discharging inclined hole 509, the bottom of the material collecting hopper 501 is fixedly connected to the material guiding inclined tube 502, the bottom of the material guiding inclined tube 502 is fixedly connected to the straight tube 506, the bottom of the straight tube 506 is fixedly connected to the first mounting frame 503, the first mounting frame 503 is fixedly connected to the second driving motor 504, the straight cylinder 506 is rotatably connected with the packing auger 507 through a bearing fixedly connected with the straight cylinder, the left end of the side wall of the top of the straight cylinder 506 is highly connected with a first discharging pipe 505, the first discharging pipe 505 is arranged at the top of the feeding cylinder 403, the discharging inclined hole 509 is arranged at the upper end of the third discharging pipe 703, the sieving plate 704 drives the arc baffle 508 to rotate during sieving, the arc baffle 508 blocks the discharging inclined hole 509, the sieving plate 704 drives the top of the arc baffle 508 to be lower than the bottom of the discharging inclined hole 509 when sieving is finished, top materials of the sieving plate 704 enter the collecting hopper 501 through the discharging inclined hole 509, the sieving plate 704 drives the arc baffle 508 of the circulating structure 5 to move to the bottom of the discharging inclined hole 509 after sieving is finished, cotton and hemp fibers which do not pass through the sieving plate 704 enter the discharging inclined hole 509 through self gravity, then enter the straight cylinder 506 through the collecting hopper 501 and the guiding inclined pipe 502, the second driving motor 504 drives the packing auger 507 to rotate, the auger 507 drives the cotton and hemp fibers which do not pass through the sieving plate 704 to enter the first discharge pipe 505, and then the cotton and hemp fibers are rolled and cut again in the feeding cylinder 403 and finally enter the box body 1 for secondary cutting, so that the maximum cutting of the cotton and hemp fibers into standard length is realized, and the full utilization of materials is facilitated.

When in use, the cotton and flax limit is placed in the feeding cylinder 403, the first driving motor 305 of the crushing structure 3 is started, the first driving motor 305 drives the rotating shaft 301 to rotate, the rotating shaft 301 drives the first bevel gear 302 to rotate, the first bevel gear 302 drives the second bevel gear 303 to rotate, the second bevel gear 303 drives the crankshaft 304 to rotate, the connecting rod journal of the crankshaft 304 respectively drives the first movable plate 402 and the second movable plate 406 of the rolling and cutting structure 4 to move, the first movable plate 402 drives the first connecting transverse plate 405 to move back and forth, the first connecting transverse plate 405 drives the rolling cutter 401 to move back and forth, the rolling cutter 401 performs back and forth rolling and cutting on the material in the feeding cylinder 403, so as to realize the rolling and cutting treatment on the cotton and flax fiber, the second movable plate 406 drives the second connecting transverse plate 405 to move back and forth, the second connecting transverse plate 407 drives the straight baffle 408 to move back and forth, and the straight baffle 408 intermittently discharges the cotton and flax fiber rolled in, the retention time of the cotton and hemp fibers in the feeding cylinder 403 is prolonged, the rolling cutter 401 is facilitated to perform multiple rolling cuts, the rolling cut effect is improved, the later shearing effect is reduced, the cutting speed of the cotton and hemp fibers is increased, then the crankshaft 304 drives the rotating blade 307 to rotate, the rotating blade 307 and the fixed blade 306 are matched to cut the rolled cotton and hemp fibers, the cut cotton and hemp fibers enter the third discharging pipe 703 of the screening structure 7 through the second discharging pipe 6, the third driving motor 701 of the screening structure 7 is started, the third driving motor 701 drives the screening plate 704 to rotate back and forth in the screening cylinder 705, the screening plate 704 drives the cut cotton and hemp fibers to shake, the shaken cotton and hemp fibers are beneficial to screening by the screening plate 704, and the screening effect is improved; after screening is finished, the screening plate 704 drives the arc-shaped baffle 508 of the circulating structure 5 to move to the bottom of the discharge inclined hole 509, cotton and hemp fibers which do not pass through the screening plate 704 enter the discharge inclined hole 509 through self gravity, then enter the straight cylinder 506 through the collecting hopper 501 and the material guide inclined pipe 502, the second driving motor 504 drives the packing auger 507 to rotate, the packing auger 507 drives the cotton and hemp fibers which do not pass through the screening plate 704 to enter the first discharge pipe 505, then the cotton and hemp fibers are rolled and cut again in the feeding cylinder 403, and finally the cotton and hemp fibers enter the box body 1 to be cut again, so that the maximum cutting of the cotton and hemp fibers into standard length is realized, and the full utilization of materials is facilitated.

The starch, the glycerol, the cotton-flax fiber, the benzoin ethyl ether, the diethyl phthalate, the auxiliary agent and the antioxidant are used as raw materials for preparing the composite plant fiber biodegradable material, and the prepared composite plant fiber biodegradable material is small in density, small in tensile strength and large in impact strength, is beneficial to practical use, is high in degradation speed, is simple in preparation method and is beneficial to enterprise production.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.