CN113400609A - Preparation process of water-absorbing degradable plastic film - Google Patents
Preparation process of water-absorbing degradable plastic film Download PDFInfo
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- CN113400609A CN113400609A CN202110511730.8A CN202110511730A CN113400609A CN 113400609 A CN113400609 A CN 113400609A CN 202110511730 A CN202110511730 A CN 202110511730A CN 113400609 A CN113400609 A CN 113400609A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2300/00—Characterised by the use of unspecified polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2397/00—Characterised by the use of lignin-containing materials
- C08J2397/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2400/00—Characterised by the use of unspecified polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2497/00—Characterised by the use of lignin-containing materials
- C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- Polymers & Plastics (AREA)
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Abstract
The invention discloses a preparation process of a water-absorbing degradable plastic film, belonging to the field of degradable composite materials, and the preparation process of the water-absorbing degradable plastic film comprises the following steps: pre-preparing an inner membrane; preparing a characteristic film; preparing an absorption film; pre-preparing an outer membrane; pre-preparing a permeable inner membrane; multi-layer coextrusion; the blown film, can be through when preparing the water absorption type plastic film, increase inner membrance and absorption film of permeating water, make its hydroscopicity in order to increase the water absorption type plastic film of mutually supporting, when soil moisture is higher, can effectively absorb unnecessary moisture in the soil, keep the humidity of coverage area soil, reduce the harm of waterlogging to crops, with the survival rate that improves crops, and then reduce the input cost old cost of agriculture, and obtain the multi-layer water absorption type plastic film through multilayer coextrusion mode, when improving water absorption type plastic film performance, the production preparation of the water absorption type plastic film of effectively being convenient for, reduce the preparation cost.
Description
Technical Field
The invention relates to the field of degradable composite materials, in particular to a preparation process of a water-absorbing degradable plastic film.
Background
The agricultural mulching film is a general name of plastic films applied to agricultural production and plays an important role in moisture preservation and heat preservation in the sowing period. With the progress of science and technology, the requirements on agricultural films are higher and higher, various novel films are continuously appeared, and a plurality of advanced agricultural films are introduced. Such as: light and thin films, multipurpose films, long-life films, insect-proof films, disease-preventing films, weeding films and degradation films.
At present, after the agricultural mulching film is used, the agricultural mulching film can be treated as agricultural garbage, and due to the plastic property of the agricultural mulching film, the agricultural mulching film cannot be effectively degraded, so that the burden of the environment is increased.
In the use process of the existing agricultural mulching film made of the degradable film, the evaporation of water in soil is effectively reduced due to the covering property of the mulching film on the soil, but if the soil humidity of an area is high, the mulching film still continuously keeps the soil humidity, so that the agricultural mulching film is easy to have adverse effects on crops, the survival rate of the crops is reduced, and the input cost of agriculture is increased.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a preparation process of a water-absorbing degradable plastic film, which can increase the water absorption of the water-absorbing mulching film by adding a water-permeable inner film and an absorption film when the water-absorbing mulching film is prepared, can effectively absorb redundant water in soil when the soil humidity is higher, maintain the humidity of the soil in a coverage area, reduce the harm of waterlogging to crops, improve the survival rate of the crops and further reduce the agricultural investment cost, and can obtain a multilayer water-absorbing mulching film in a multilayer coextrusion mode, thereby improving the service performance of the water-absorbing mulching film, effectively facilitating the production and preparation of the water-absorbing mulching film and reducing the preparation cost.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A preparation process of a water-absorbing degradable plastic film comprises the following steps:
s1, inner membrane pre-preparation: plasticizing resin prepared from a microbial degradable material to obtain an inner membrane raw material;
s2, characteristic film prefabrication: plasticizing resin of the additive for crop growth by mixing to obtain a characteristic film raw material;
s3, preparing an absorption film in advance: plasticizing resin mixed with water-absorbing material to obtain raw material of the absorbing film;
s4, outer membrane pre-preparation: plasticizing resin prepared from a photodegradable material to obtain an outer membrane raw material;
s5, preparing a permeable inner membrane: mixing the self-blocking type permeable ball with resin, and plasticizing to obtain a permeable inner membrane raw material;
s6, multilayer coextrusion: extruding an inner membrane raw material, a permeable inner membrane raw material, a characteristic membrane raw material, an absorption membrane raw material and an outer membrane raw material together by using multilayer coextrusion equipment to obtain a multilayer mulching film raw material;
s7, film blowing: then, blowing the extruded multi-layer mulching film raw material by using film blowing forming equipment to obtain a film bubble type mulching film raw material;
s8, stretch forming: stretching the raw material of the bubble type mulching film by stretching equipment, and cooling and forming to obtain the water-absorbing mulching film;
s9, rolling and warehousing: and rolling the obtained water-absorbing mulching film into a roller through a rolling device, and merging the roller into a warehouse for storage. Through when preparing the water absorption type plastic film, increase inner membrance and absorption film of permeating water, make its hydroscopicity in order to increase the water absorption type plastic film of mutually supporting, when soil humidity is higher, can effectively absorb unnecessary moisture in the soil, keep the humidity of coverage area soil, reduce the harm of waterlogging to crops, with the survival rate that improves crops, and then reduce the input cost old cost of agriculture, and obtain the multi-storied water absorption type plastic film through multilayer coextrusion mode, when improving water absorption type plastic film performance, the production preparation of the water absorption type plastic film of being convenient for effectively, reduce the preparation cost.
Furthermore, water absorption type plastic film is including the microbial degradation inner membrance that is formed by the inner membrance raw materials, microbial degradation inner membrance upper end bonds and has the suitable crop characteristic membrane that is formed by the characteristic membrane raw materials, suitable crop characteristic membrane upper end bonds and has the humidity control absorption membrane that is formed by the absorption membrane raw materials, humidity control absorption membrane upper end bonds and has the addition type photodegradation adventitia that is formed by the adventitia raw materials, microbial degradation inner membrance left and right sides bonds and has the pre-buried border inner membrance that permeates water that is formed by the inner membrance raw materials that permeates water, pre-buried border permeates water the inner membrance intussuseption and is filled with a plurality of from separation type and permeate water the ball, and pre-buried border permeate water the inner membrance and cooperate with the humidity control absorption. The water permeable inner membranes are compositely adhered to the two sides of the microbial degradation inner membrane, so that the contact part of the microbial degradation inner membrane and soil has water permeability, excessive water in the soil can be conveyed to the inside of the crop characteristic membrane through the self-blocking water permeable balls, the water in the soil is controlled, soil loss is effectively avoided, and after the water absorption type mulching membrane is decomposed under the influence of light and microorganisms, the water in the crop characteristic membrane can be released, the slow action and the soil are achieved, an additive in the humidity regulation absorption membrane is also released, the action and the soil are achieved simultaneously, the growth of crops is further promoted, and the yield of the crops is effectively improved.
Furthermore, the left side and the right side of the additive type photodegradation outer membrane are both bonded with embedded edge microbial degradation outer membranes formed by inner membrane raw materials, and the width of the embedded edge microbial degradation outer membranes is equal to that of the embedded edge permeable inner membranes. The edge of the additive type photodegradation outer film is changed into the embedded edge microbial degradation outer film which is made of the same raw material as the microbial degradation inner film, so that when the water-absorbing type mulching film is used, the embedded edge microbial degradation outer film replaces the additive type photodegradation outer film to be buried in soil, the oxidative degradation of the water-absorbing type mulching film is effectively promoted, the environmental protection performance of the water-absorbing type mulching film is improved, the degradation efficiency of the water-absorbing type mulching film is effectively improved, and the influence of undegraded water-absorbing type mulching film on the crop growth is reduced.
Furthermore, ultraviolet independent reflection additional films are bonded to the left side and the right side of the upper end of the additive type photodegradation outer film, and the two ultraviolet independent reflection additional films are located on the inner sides of the corresponding embedded edge microbial degradation outer films and are bonded with the embedded edge microbial degradation outer films. The ultraviolet independent reflection additional film is positioned at the edge of the additive type photodegradation outer film and at a position close to soil, can reflect ultraviolet rays, reflects the ultraviolet rays to the surface of the soil, effectively plays a role in preventing insects, and effectively prevents insects generated in the early growth stage of crops.
Further, the pins are arranged at the front end and the rear end of the self-blocking type water permeable ball in a fixedly connected mode, the left end and the right end of the self-blocking type water permeable ball are fixedly connected with a plurality of stable cutting antennae, and the self-blocking type water permeable ball forms rectangular array distribution through the pins and the stable cutting antennae in the pre-buried edge water permeable inner film. Through firm mutual absorption and the making between cutting off the antenna, arrange the pin and the pre-buried border adhesive property of the inner membrance that permeates water, effectively improve the stability and the exactness of row material from the separation type ball that permeates water, make the ball that permeates water from the separation type can effectively arrange the material in pre-buried border inner membrance that permeates water, play the water permeability effect.
Furthermore, the upper end and the lower end of the self-blocking type permeable ball are fixedly connected with one-way permeable antennae which are positioned at the upper side and penetrate through the applicable crop characteristic film and extend into the humidity adjusting absorption film. The unidirectional water-permeable antenna connects the soil with the humidity adjusting absorption film, when the moisture in the soil is excessive, the unidirectional water-permeable antenna can transmit the moisture to the humidity adjusting absorption film to absorb the moisture in the soil, and the probability that crops die due to waterlogging is reduced.
Furthermore, all be provided with a plurality of vertical distribution's water absorption transport from the inside upper and lower both sides of separation type ball that permeates water and lead to a, and water absorption transport lead to an outer end respectively with the corresponding one-way feeler switch-on that permeates water, be provided with a plurality of transverse distribution's the water saturation extension line from the inside left and right sides of separation type ball that permeates water, and water saturation extension line outer end respectively with the corresponding firm feeler switch-on that cuts off, the inner of water saturation extension line is connected with the inner that water absorption transport leads to a. Through absorbing water and carrying to lead to a branch and the hydrosaturation extension line cooperatees for pre-buried border inner membrance of permeating water has the suitability, and when moisture content in soil was normal, the ball of permeating water of self-blocking type was impervious state, and then did not absorb the moisture content in soil, and when moisture content in soil was too much, the ball of permeating water of self-blocking type was pervious state, and then absorbed unnecessary moisture in the soil, effectively improved the practicality of the type plastic film that absorbs water, supplementary crops growth.
Furthermore, the microbial degradation material in the inner membrane raw material is made of natural plant long fibers, and the natural plant long fibers are a mixture of two or more of coconut fibers, jute wood powder, wheat flour, bamboo powder and pulp materials. By adopting the natural plant long fiber to prepare the microbial degradation inner film, the water absorption type mulching film has degradability, the decomposition pressure of soil is relieved, and meanwhile, the degraded water absorption type mulching film can be converted into natural fertilizer, so that the fertility degree of the soil is improved.
Further, the preparation method of the resin of the inner membrane raw material comprises the following steps: mixing 10-60% of natural plant long fiber with resin with the melting temperature below the temperature, and mixing and granulating to obtain the natural plant long fiber.
Furthermore, the additive for crop growth is a herbicide. After the water-absorbing mulching film is degraded, the herbicide in the crop characteristic film is suitable for being slowly released to act on soil, so that weeds in the soil are uniformly or killed, the labor intensity of farmers is effectively reduced while the growth of crops is promoted, and the agricultural soil is assisted to be maintained.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme is through when preparing the water absorption type plastic film, increase inner membrance and absorption film of permeating water, make its hydroscopicity in order to increase the water absorption type plastic film of mutually supporting, when soil moisture is higher, can effectively absorb unnecessary moisture in the soil, keep the humidity of coverage area soil, reduce the harm of waterlogging to crops, with the survival rate that improves crops, and then reduce the input cost old book of agricultural, and obtain the multi-storied type plastic film that absorbs water through the multilayer coextrusion mode, when improving water absorption type plastic film performance, the production preparation of the water absorption type plastic film of effectively being convenient for, reduce the preparation cost.
(2) The water permeable inner membranes are compositely adhered to the two sides of the microbial degradation inner membrane, so that the contact part of the microbial degradation inner membrane and soil has water permeability, excessive water in the soil can be conveyed to the inside of the crop characteristic membrane through the self-blocking water permeable balls, the water in the soil is controlled, soil loss is effectively avoided, and after the water absorption type mulching membrane is decomposed under the influence of light and microorganisms, the water in the crop characteristic membrane can be released, the slow action and the soil are achieved, an additive in the humidity regulation absorption membrane is also released, the action and the soil are achieved simultaneously, the growth of crops is further promoted, and the yield of the crops is effectively improved.
(3) The edge of the additive type photodegradation outer film is changed into the embedded edge microbial degradation outer film which is made of the same raw material as the microbial degradation inner film, so that when the water-absorbing type mulching film is used, the embedded edge microbial degradation outer film replaces the additive type photodegradation outer film to be buried in soil, the oxidative degradation of the water-absorbing type mulching film is effectively promoted, the environmental protection performance of the water-absorbing type mulching film is improved, the degradation efficiency of the water-absorbing type mulching film is effectively improved, and the influence of undegraded water-absorbing type mulching film on the crop growth is reduced.
(4) The ultraviolet independent reflection additional film is positioned at the edge of the additive type photodegradation outer film and at a position close to soil, can reflect ultraviolet rays, reflects the ultraviolet rays to the surface of the soil, effectively plays a role in preventing insects, and effectively prevents insects generated in the early growth stage of crops.
(5) Through firm mutual absorption and the making between cutting off the antenna, arrange the pin and the pre-buried border adhesive property of the inner membrance that permeates water, effectively improve the stability and the exactness of row material from the separation type ball that permeates water, make the ball that permeates water from the separation type can effectively arrange the material in pre-buried border inner membrance that permeates water, play the water permeability effect.
(6) The unidirectional water-permeable antenna connects the soil with the humidity adjusting absorption film, when the moisture in the soil is excessive, the unidirectional water-permeable antenna can transmit the moisture to the humidity adjusting absorption film to absorb the moisture in the soil, and the probability that crops die due to waterlogging is reduced.
(7) Through absorbing water and carrying to lead to a branch and the hydrosaturation extension line cooperatees for pre-buried border inner membrance of permeating water has the suitability, and when moisture content in soil was normal, the ball of permeating water of self-blocking type was impervious state, and then did not absorb the moisture content in soil, and when moisture content in soil was too much, the ball of permeating water of self-blocking type was pervious state, and then absorbed unnecessary moisture in the soil, effectively improved the practicality of the type plastic film that absorbs water, supplementary crops growth.
(8) By adopting the natural plant long fiber to prepare the microbial degradation inner film, the water absorption type mulching film has degradability, the decomposition pressure of soil is relieved, and meanwhile, the degraded water absorption type mulching film can be converted into natural fertilizer, so that the fertility degree of the soil is improved.
(9) After the water-absorbing mulching film is degraded, the herbicide in the crop characteristic film is suitable for being slowly released to act on soil, so that weeds in the soil are uniformly or killed, the labor intensity of farmers is effectively reduced while the growth of crops is promoted, and the agricultural soil is assisted to be maintained.
Drawings
FIG. 1 is a schematic diagram of the process flow structure of the present invention;
FIG. 2 is a schematic view of a process frame structure according to the present invention;
FIG. 3 is an exploded view of the water-absorbing mulch film according to the present invention;
FIG. 4 is a schematic view of a cross-sectional structure of a water-absorbing mulch film according to the present invention;
FIG. 5 is a schematic view of the structure A of FIG. 4 in accordance with the present invention;
FIG. 6 is a schematic diagram of the structure of FIG. 4 at B in accordance with the present invention;
FIG. 7 is a schematic view of the structure of FIG. 4 at C in accordance with the present invention;
FIG. 8 is a schematic diagram of the axial measurement structure of the self-blocking type water permeable ball of the present invention;
FIG. 9 is a left side view of the self-blocking type water permeable ball of the present invention;
fig. 10 is a schematic view of the self-blocking type permeable ball after the inner portion is connected.
The reference numbers in the figures illustrate:
1 microbial degradation inner membrane, 2 applicable crop characteristic membrane, 3 humidity adjusting absorption membrane, 4 additive type photodegradation outer membrane, 5 pre-buried edge permeable inner membrane, 6 pre-buried edge microbial degradation outer membrane, 7 ultraviolet independent reflection additional membrane, 8 self-blocking type permeable ball, 801 one-way permeable antenna, 802 stable cut-off antenna, 803 water absorption and transportation through branch, 804 water saturation extension line, 9 arrangement pins and 10 water absorption type mulching membrane.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-10, a preparation process of a water-absorbing degradable plastic film includes the following steps:
s1, inner membrane pre-preparation: plasticizing resin prepared from a microbial degradable material to obtain an inner membrane raw material;
s2, characteristic film prefabrication: plasticizing resin of the additive for crop growth by mixing to obtain a characteristic film raw material;
s3, preparing an absorption film in advance: plasticizing resin mixed with water-absorbing material to obtain raw material of the absorbing film;
s4, outer membrane pre-preparation: plasticizing resin prepared from a photodegradable material to obtain an outer membrane raw material;
s5, preparing a permeable inner membrane: mixing the self-blocking type water permeable ball 8 with resin, and plasticizing to obtain a water permeable inner membrane raw material;
s6, multilayer coextrusion: extruding an inner membrane raw material, a permeable inner membrane raw material, a characteristic membrane raw material, an absorption membrane raw material and an outer membrane raw material together by using multilayer coextrusion equipment to obtain a multilayer mulching film raw material;
s7, film blowing: then, blowing the extruded multi-layer mulching film raw material by using film blowing forming equipment to obtain a film bubble type mulching film raw material;
s8, stretch forming: stretching the raw material of the bubble type mulching film by stretching equipment, and cooling and forming to obtain the water-absorbing mulching film 10;
s9, rolling and warehousing: the obtained water absorption type mulching film 10 is rolled into a roll by a rolling device and is merged into a warehouse for storage. Through when preparing water absorption type plastic film 10, increase inner membrance and absorption film of permeating water, make it mutually support in order to increase the hydroscopicity of water absorption type plastic film 10, when soil humidity is higher, can effectively absorb unnecessary moisture in the soil, keep the humidity of coverage area soil, reduce the harm of waterlogging to crops, with the survival rate that improves crops, and then reduce the input cost old cost of agriculture, and obtain multilayer water absorption type plastic film 10 through multilayer coextrusion mode, when improving water absorption type plastic film 10 performance, the production preparation of water absorption type plastic film 10 of being effectively convenient for, reduce the preparation cost.
Example 2:
referring to fig. 1 to 10, wherein the same or corresponding components as those in embodiment 1 are designated by the same reference numerals as those in embodiment 1, only the points different from embodiment 1 will be described below for the sake of convenience. This example 2 differs from example 1 in that: referring to fig. 3 and 4, the water-absorbing mulching film 10 includes a biodegradable inner film 1 formed of an inner film material, an applicable crop characteristic film 2 formed of a characteristic film material is bonded to an upper end of the biodegradable inner film 1, a humidity-adjusting absorption film 3 formed of an absorption film material is bonded to an upper end of the applicable crop characteristic film 2, an additive type photodegradable outer film 4 formed of an outer film material is bonded to an upper end of the humidity-adjusting absorption film 3, pre-buried edge permeable inner films 5 formed of a permeable inner film material are bonded to left and right sides of the biodegradable inner film 1, a plurality of self-blocking type permeable balls 8 are filled in the pre-buried edge permeable inner films 5, and the pre-buried edge permeable inner films 5 are matched with the humidity-adjusting absorption film 3 through the self-blocking type permeable balls 8. The water permeable inner membranes 5 are bonded and embedded at the two sides of the microbial degradation inner membrane 1 in a composite mode, so that the contact part of the microbial degradation inner membrane 1 and soil has water permeability, excessive water in the soil can be conveyed into the applicable crop characteristic membrane 2 through the self-blocking water permeable balls 8, the water in the soil is controlled, soil loss is effectively avoided, and after the water absorption type mulching film 10 is decomposed under the influence of light and microorganisms, the water in the applicable crop characteristic membrane 2 can be released, the slow action is realized on the soil, additives in the humidity regulation absorption membrane 3 are also released, the effects are realized on the soil, the growth of crops is further promoted, and the yield of the crops is effectively improved.
Referring to fig. 3-5, the left and right sides of the additive type photodegradable outer membrane 4 are both bonded with the embedded edge microbial degradable outer membrane 6 formed by the inner membrane raw material, and the width of the embedded edge microbial degradable outer membrane 6 is equal to the width of the embedded edge permeable inner membrane 5. The edge of the additive type photodegradation outer film 4 is changed into the embedded edge microbial degradation outer film 6 which is made of the same raw material as the microbial degradation inner film 1, so that when the water-absorbing type mulching film 10 is used, the embedded edge microbial degradation outer film 6 replaces the additive type photodegradation outer film 4 to be buried in soil, the oxidative degradation of the water-absorbing type mulching film 10 is effectively promoted, the environmental protection performance of the water-absorbing type mulching film 10 is improved, the degradation efficiency of the water-absorbing type mulching film 10 is effectively improved, and the influence of the undegraded water-absorbing type mulching film 10 on the crop growth is reduced.
Referring to fig. 3-7, ultraviolet independent reflection additional films 7 are bonded to the left and right sides of the upper end of the additive type photodegradation outer film 4, and the two ultraviolet independent reflection additional films 7 are located on the inner sides of the corresponding embedded edge microbial degradation outer films 6 and bonded to the embedded edge microbial degradation outer films 6. The ultraviolet independent reflection additional film 7 is positioned at the edge of the additive type photodegradation outer film 4 and at a position close to soil, can reflect ultraviolet rays, reflects the ultraviolet rays to the surface of the soil, effectively plays a role in preventing insects, and effectively prevents insects generated in the early growth stage of crops.
Referring to fig. 8, the front and rear ends of the self-blocking type water permeable ball 8 are fixedly connected with the arrangement pins 9, the left and right ends of the self-blocking type water permeable ball 8 are fixedly connected with the plurality of stable cutting contact corners 802, and the self-blocking type water permeable ball 8 forms a rectangular array distribution in the pre-buried edge water permeable inner film 5 through the arrangement pins 9 and the stable cutting contact corners 802. Through firm mutual adsorption and the making between cutting off the feeler 802, arrange the adhesion of pin 9 and the pre-buried border inner film 5 that permeates water, effectively improve the stability and the exactness of arranging material from separation type ball 8 that permeates water, make from separation type ball 8 that permeates water can effectively arrange the material in pre-buried border inner film 5 that permeates water, play the water permeability effect.
Referring to fig. 9, the upper and lower ends of the self-barrier water permeable ball 8 are fixedly connected with one-way water permeable antennae 801, and the one-way water permeable antennae 801 located on the upper side penetrate through the applicable crop characteristic film 2 and extend into the humidity adjusting absorption film 3. The one-way water-permeable antenna 801 connects the soil with the humidity-adjusting absorption film 3, and when the moisture in the soil is excessive, the moisture can be transferred into the humidity-adjusting absorption film 3 through the one-way water-permeable antenna 801 to absorb the moisture in the soil, so that the probability of death of crops due to waterlogging is reduced.
Referring to fig. 10, a plurality of water-absorbing and transporting through branches 803 are vertically arranged on the upper and lower sides of the interior of the self-blocking type permeable ball 8, the outer ends of the water-absorbing and transporting through branches 803 are respectively communicated with the corresponding one-way permeable antenna 801, a plurality of water-saturation extension lines 804 are transversely arranged on the left and right sides of the interior of the self-blocking type permeable ball 8, the outer ends of the water-saturation extension lines 804 are respectively communicated with the corresponding stable cut-off antennas 802, and the inner ends of the water-saturation extension lines 804 are connected with the inner ends of the water-absorbing and transporting through branches 803. Through absorbing water and carrying and lead to branch 803 and the water saturation extension line 804 and cooperate for pre-buried border inner membrance 5 that permeates water has the suitability, and when moisture content in soil is normal, from the impervious state of the permeable ball 8 of separation type, and then do not absorb moisture content in soil, when moisture content in soil is too much, from the permeable ball 8 of separation type for the permeable state, and then absorb unnecessary moisture in soil, effectively improve the practicality of the type plastic film 10 that absorbs water, supplementary crops grow.
Referring to fig. 1-10, the method of use: when the farmer uses the water-absorbing mulching film 10 to cover crops in soil, the additive type photodegradation outer film 4 is laid out, and the positions of the pre-buried edge permeable inner film 5 and the pre-buried edge microbial degradation outer film 6 are buried by soil, so that the water-absorbing mulching film 10 is fixed; in the process of protecting crops by the water absorption type mulching film 10, the ultraviolet independent reflection additional film 7 reflects ultraviolet light beams after being irradiated by sunlight, the ultraviolet independent reflection additional film 7 reflects the ultraviolet light to the soil, so that insects are far away from the coverage area of the water absorption type mulching film 10 to play a role in preventing insects, and the ultraviolet independent reflection additional film 7 reflects the ultraviolet light to the addition type photodegradation outer film 4 to promote the degradation of the addition type photodegradation outer film 4; when the moisture in the soil is excessive, the moisture is continuously conveyed to the water absorption conveying branch 803 through the one-way water permeable feeler 801 at the lower side and conveyed to the water saturation extension line 804, the water absorption conveying branch 803 is continuously extended inwards after the water saturation extension line 804 absorbs the moisture, the water absorption conveying branch is stopped after the water saturation extension line 804 absorbs the water, at the moment, the water absorption conveying branch 803 at the upper side and the lower side are communicated, so that the moisture in the soil can enter the humidity regulation absorption film 3 through the one-way water permeable feeler 801 at the upper side, the moisture in the soil is further absorbed, and the waterlogging protection is carried out on crops; when the moisture in the soil is recovered to be normal, because the lower one-way water-permeable antenna 801 cannot continuously absorb the moisture, the moisture of the water saturation extension line 804 is gradually reduced, so that the original state is recovered to shrink, the water absorption conveying branches 803 on the upper side and the lower side are separated, the continuous absorption of the humidity adjusting absorption film 3 is disconnected, and the phenomenon that the soil is excessively dry due to the continuous absorption of the humidity adjusting absorption film 3 is effectively prevented; in the long-time use process, crops continuously grow, the microbial degradation inner film 1 is continuously oxidized and decomposed by the microbial action in soil and the additive type photodegradation outer film 4 is continuously oxidized and decomposed by the oxidation action of sunlight, the applicable crop characteristic film 2 and the humidity adjusting absorption film 3 are also continuously decomposed, the water absorption type mulching film 10 is degraded, the step of taking out the water absorption type mulching film 10 by farmers is omitted, the crop additive in the applicable crop characteristic film 2 slowly releases the soil, acts on the soil, inhibits the growth of weeds, continuously releases water in the humidity adjusting absorption film 3, assists the growth of the crops, effectively increases the environmental protection performance of the water absorption type mulching film 10, reduces the self-cleaning burden of the soil, promotes the growth of the crops, and effectively improves the yield of the crops.
Example 3:
referring to fig. 1 to 10, wherein the same or corresponding components as those in embodiment 1 are designated by the same reference numerals as those in embodiment 1, only the points different from embodiment 1 will be described below for the sake of convenience. This example 3 differs from example 1 in that: referring to fig. 1 and 2, the biodegradable material in the inner film raw material is made of natural plant long fibers, and the natural plant long fibers are a mixture of two or more of coconut fibers, jute wood powder, wheat flour, bamboo powder and pulp material. By adopting the natural plant long fiber to prepare the microbial degradation inner film 1, the water absorption type mulching film 10 has degradability, the decomposition pressure of soil is relieved, and meanwhile, the water absorption type mulching film 10 can be converted into natural fertilizer through degradation, so that the fertility degree of the soil is improved.
Referring to fig. 1 and 2, the preparation method of the resin of the inner film raw material comprises: mixing 10-60% of natural plant long fiber with resin with the melting temperature below 200 ℃, and carrying out mixing and granulation to obtain the natural plant long fiber.
Referring to fig. 1 and 2, the crop growth additive is a herbicide. After the water-absorbing mulching film 10 is degraded, the herbicide in the crop characteristic film 2 is slowly released to act on soil, so that weeds in the soil are uniformly killed, the growth of crops is promoted, the labor intensity of farmers is effectively reduced, and the agricultural soil is assisted to be maintained.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (10)
1. A preparation process of a water-absorbing degradable plastic film is characterized by comprising the following steps: the method comprises the following steps:
s1, inner membrane pre-preparation: plasticizing resin prepared from a microbial degradable material to obtain an inner membrane raw material;
s2, characteristic film prefabrication: plasticizing resin of the additive for crop growth by mixing to obtain a characteristic film raw material;
s3, preparing an absorption film in advance: plasticizing resin mixed with water-absorbing material to obtain raw material of the absorbing film;
s4, outer membrane pre-preparation: plasticizing resin prepared from a photodegradable material to obtain an outer membrane raw material;
s5, preparing a permeable inner membrane: mixing the self-blocking type water permeable ball (8) with resin, and plasticizing to obtain a water permeable inner membrane raw material;
s6, multilayer coextrusion: extruding an inner membrane raw material, a permeable inner membrane raw material, a characteristic membrane raw material, an absorption membrane raw material and an outer membrane raw material together by using multilayer coextrusion equipment to obtain a multilayer mulching film raw material;
s7, film blowing: then, blowing the extruded multi-layer mulching film raw material by using film blowing forming equipment to obtain a film bubble type mulching film raw material;
s8, stretch forming: stretching the raw material of the bubble type mulching film by stretching equipment, and cooling and forming to obtain the water-absorbing mulching film (10);
s9, rolling and warehousing: the obtained water-absorbing mulching film (10) is rolled into a roller by a rolling device and is merged into a warehouse for storage.
2. The preparation process of the water-absorbing degradable plastic film according to claim 1, wherein the preparation process comprises the following steps: water absorption type plastic film (10) are including the little biodegradable inner membrance (1) that is formed by the inner membrance raw materials, it has suitable crop characteristic membrane (2) that are formed by the characteristic membrane raw materials to bond in little biodegradable inner membrance (1) upper end, it has humidity control absorbing film (3) that are formed by the absorbing film raw materials to bond in suitable crop characteristic membrane (2) upper end, it has addition type photodegradation adventitia (4) that are formed by the adventitia raw materials to bond in humidity control absorbing film (3) upper end, both sides bond about little biodegradable inner membrance (1) and have pre-buried border that is formed by the inner membrance raw materials that permeates water inner membrance (5), pre-buried border permeates water inner membrance (5) intussuseption and is filled with a plurality of from separation type and permeates water ball (8), and pre-buried border and permeates water inner membrance (5) and cooperate with humidity control absorbing film (3.
3. The preparation process of the water-absorbing degradable plastic film according to claim 2, wherein the preparation process comprises the following steps: the left side and the right side of the additive type photodegradation outer membrane (4) are both bonded with an embedded edge microbial degradation outer membrane (6) formed by inner membrane raw materials, and the width of the embedded edge microbial degradation outer membrane (6) is equal to that of the embedded edge permeable inner membrane (5).
4. The preparation process of the water-absorbing degradable plastic film according to claim 3, wherein the preparation process comprises the following steps: ultraviolet independent reflection additional films (7) are bonded to the left side and the right side of the upper end of the additive type photodegradation outer film (4), and the ultraviolet independent reflection additional films (7) are located on the inner sides of the corresponding embedded edge microbial degradation outer films (6) and are bonded with the embedded edge microbial degradation outer films (6).
5. The preparation process of the water-absorbing degradable plastic film according to claim 2, wherein the preparation process comprises the following steps: from the equal fixedly connected with in both ends arranges pin (9) around separation type ball (8) that permeates water, from separation type ball (8) that permeates water about the equal fixedly connected with in both ends a plurality of stabilities of both ends cut off feeler (802), and from separation type ball (8) that permeates water through arranging pin (9) and stabilize and cut off feeler (802) formation rectangular array and distribute in pre-buried border inner membrance (5) of permeating water.
6. The preparation process of the water-absorbing degradable plastic film according to claim 5, wherein the preparation process comprises the following steps: the upper end and the lower end of the self-blocking type water permeable ball (8) are fixedly connected with one-way water permeable antennae (801), the one-way water permeable antennae (801) are positioned on the upper side and penetrate through the applicable crop characteristic film (2) and extend into the humidity adjusting absorption film (3).
7. The preparation process of the water-absorbing degradable plastic film according to claim 6, wherein the preparation process comprises the following steps: the utility model discloses a water saturation device, including separation type ball (8), the ball that permeates water of self-insulation type (8) inside upper and lower both sides all are provided with a plurality of vertical distribution's delivery of absorbing water and lead to a (803), and absorb water and carry to lead to an (803) outer end and corresponding one-way feeler (801) switch-on of permeating water respectively, both sides are provided with a plurality of transverse distribution's water saturation extension line (804) about self-insulation type ball (8) inside, and water saturation extension line (804) outer end respectively with corresponding firm feeler (802) switch-on of cutting off, the inner of water saturation extension line (804) is connected with the inner of the delivery of absorbing water through (803).
8. The preparation process of the water-absorbing degradable plastic film according to claim 1, wherein the preparation process comprises the following steps: the microbial degradation material in the inner membrane raw material is made of natural plant long fibers, and the natural plant long fibers are a mixture of two or more of coconut fibers, jute wood powder, wheat powder, bamboo powder and pulp materials.
9. The preparation process of the water-absorbing degradable plastic film according to claim 8, wherein the preparation process comprises the following steps: the preparation method of the resin of the inner membrane raw material comprises the following steps: mixing 10-60% of natural plant long fiber with resin with the melting temperature below 200 ℃, and carrying out mixing and granulation to obtain the natural plant long fiber.
10. The preparation process of the water-absorbing degradable plastic film according to claim 1, wherein the preparation process comprises the following steps: the crop growth additive is a herbicide.
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