CN112406145B - High-uniformity preparation process of PVC (polyvinyl chloride) antibacterial film - Google Patents
High-uniformity preparation process of PVC (polyvinyl chloride) antibacterial film Download PDFInfo
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- CN112406145B CN112406145B CN202011035157.XA CN202011035157A CN112406145B CN 112406145 B CN112406145 B CN 112406145B CN 202011035157 A CN202011035157 A CN 202011035157A CN 112406145 B CN112406145 B CN 112406145B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
The invention discloses a high-uniformity preparation process of a PVC antibacterial film, which belongs to the field of antibacterial films, and is characterized in that self-coagulating tennis balls are added into master batches in the preparation process, the surfaces of the self-coagulating tennis balls are in a micro-melting state through pretreatment operation, so that a mixing agent containing an antibacterial agent can be adhered, when the self-coagulating tennis balls are mixed and stirred with the master batches, the self-coagulating tennis balls are gradually crushed under the action of stirring mechanical force, a net shape is preliminarily released from the self-coagulating tennis balls to form pre-formed film particles, and then the pre-formed film particles are heated to be melted, so that net-shaped veins are completely released.
Description
Technical Field
The invention relates to the field of antibacterial films, in particular to a high-uniformity preparation process of a PVC antibacterial film.
Background
PVC is polyvinyl chloride, which is an initiator for vinyl chloride monomer (VCM for short) in the presence of peroxides, azo compounds, etc.; or a polymer polymerized by a free radical polymerization mechanism under the action of light and heat. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins.
PVC is white powder with an amorphous structure, has small branching degree, relative density of about 1.4, glass transition temperature of 77-90 ℃, starts to decompose at about 170 ℃, has poor stability to light and heat, can decompose to generate hydrogen chloride at more than 100 ℃ or after long-time sunshine insolation, further automatically catalyzes and decomposes to cause color change, and the physical and mechanical properties are also rapidly reduced.
The molecular weight of the PVC produced industrially is generally within the range of 5-11 ten thousand, and the PVC has larger polydispersity, and the molecular weight is increased along with the reduction of polymerization temperature; without a fixed melting point, softening begins at 80-85 ℃, the temperature of 130 ℃ becomes a viscoelastic state, and the temperature of 160-180 ℃ begins to be converted into a viscous state; has better mechanical property, tensile strength of about 60MPa and impact strength of 5-10 kJ/m < 2 >; has excellent dielectric properties.
Plastic film products have become indispensable chemical products in daily life and are widely used in various industries such as medicine, food, agriculture and the like. The antibacterial packaging of some medicines and foods needs a plastic film, the prior art generally adopts a PVC film, PVC is nontoxic, but auxiliary materials are usually added in the application process to change the self performance of the PVC to match the packaging requirement of products, so that the antibacterial and bacteriostatic effects are achieved, and the PVC antibacterial film is formed.
However, when the existing antibacterial film is prepared, due to the fact that the particle size narrowness of the master batch is too large, when molten materials are formed, the melting is not uniform and incomplete, the thickness of the antibacterial film finished product obtained in the later period is not uniform, the local part is thick or thin, and when the antibacterial film is used, the antibacterial film is stressed unevenly and is easy to tear, and the use is influenced.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a high-uniformity preparation process of a PVC antibacterial film, which comprises the steps of adding self-solidifying tennis balls into a master batch in the preparation process, enabling the surfaces of the self-solidifying tennis balls to be in a micro-melting state through pretreatment operation, further adhering a mixing agent containing an antibacterial agent, gradually crushing the self-solidifying tennis balls under the action of stirring mechanical force when the self-solidifying tennis balls are mixed and stirred with the master batch, preliminarily releasing reticular veins from the self-solidifying tennis balls to form pre-formed film particles, heating the pre-formed film particles to melt the pre-formed film particles, and further completely releasing the reticular veins.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A high-uniformity preparation process of a PVC antibacterial film comprises the following steps:
s1, firstly, grinding and crushing PVC particles, and drying to obtain a master batch for later use;
s2, pretreating the self-setting tennis ball to enable the surface of the self-setting tennis ball to be in a micro-melting state;
s3, uniformly mixing the antifogging agent, the antibacterial agent, the antisticking agent and the antistatic agent to obtain a mixture, and then uniformly adhering the mixture to the surface of the micro-molten self-coagulation tennis ball;
s4, adding the self-setting tennis balls adhered with the mixing agent into the master batch, uniformly stirring and mixing, and breaking the self-setting tennis balls to primarily release netty veins to obtain pre-formed particles;
s5, feeding the pre-formed film particles into an extruder, heating to enable the pre-formed film particles to be in a molten state, completely decomposing self-setting tennis balls by heating, completely releasing interwoven net-shaped veins from the molten pre-formed film particles, extruding through the extruder, and then sequentially carrying out sheet casting, stretching and heat treatment to obtain the tear-resistant antibacterial film with high uniformity.
Furthermore, the particle size of the master batch in the S1 is micron-sized, and the particle size of the master batch is finer, so that during subsequent melting, on one hand, the time required by melting is shortened, the preparation efficiency is accelerated, on the other hand, the uniformity of the melted master batch is effectively improved, and the uniformity of the finished antibacterial film is better.
Further, the specific operation of pretreatment of the self-setting tennis ball in S2 includes the following steps:
s21, firstly, filling high-temperature inert gas into the self-setting tennis ball for preheating, so that the temperature difference between the self-setting tennis ball and the high-temperature inert gas in the next step is reduced, and the heating effect of the high-temperature inert gas on the self-setting tennis ball is better;
s22, after preheating for 1-2 minutes, extracting a part of inert gas filled in the S21, then filling high-temperature inert gas again, wherein the heat of the high-temperature inert gas spreads from inside to outside to enable the surface of the self-setting tennis ball to be in a micro-melting state, so that the surface of the self-setting tennis ball has adhesion, a mixing agent can be uniformly adhered to the surface of the self-setting tennis ball, the mixing agent and the master batch can be uniformly mixed together with the self-setting tennis ball, the mixing material and the self-setting tennis ball can be mixed with the master batch, and the mixing and the master batch are folded to form a step, so that the preparation efficiency is improved.
Furthermore, the temperature of the high-temperature inert gas is not lower than 150 ℃, and the temperature is too low, so that the surface of the self-setting tennis ball is difficult to melt or does not melt, the adhesion force of the surface of the self-setting tennis ball is small, the combination of the self-setting tennis ball and the mixing agent is influenced, the melting degree of the surface of the pre-melted powder layer is large, the integral strength of the self-setting tennis ball is reduced, and the self-setting tennis ball is easy to break in advance when the mixing agent is adhered, so that the adhesion of the mixing agent is influenced.
Furthermore, the amount of the inert gas extracted in S22 is not less than half of the first filling amount, and the temperature of the preheated inert gas is reduced, so that a part needs to be extracted before high-temperature inert gas is filled again, excessive extraction easily causes the internal temperature of the self-condensing tennis ball to be suddenly reduced too much, when the self-condensing tennis ball is filled again, a large temperature difference is easily caused, too little extraction is caused, the self temperature is low, and a large temperature difference is also caused, thereby affecting the micro-melting effect on the self-condensing tennis ball.
Furthermore, the self-solidifying tennis ball comprises a pre-melting powder layer, the outer end of the pre-melting powder layer is fixedly connected with a plurality of uniformly distributed embedded net layers, and reticular veins are embedded in the embedded net layers, when the pre-melting powder layer and the net layers are stirred and mixed, the embedded net layers and the pre-melting powder layers are impacted by the force, so that the stable state of the embedded net layers and the pre-melting powder layers after the embedded net layers and the pre-melting powder layers are formed by pressing and pressing the embedded net layers and the pre-melting powder layers is broken, the reticular veins are gradually separated from the self-solidifying tennis ball, and can be uniformly mixed in the pre-film-forming particles along with the continuous stirring action.
Furthermore, the pre-fused powder layer and the embedded net layer are formed by pressing master batches through mechanical force, so that self-setting tennis balls can also be molten materials after being stirred and crushed and heated in an extruder for injection molding, the injection molding process of plastics is not easily influenced by the added self-setting tennis balls, the pressing density of the pre-fused powder layer is gradually reduced from inside to outside, the outer surface is easier to be heated and generates micro-fusion phenomenon compared with the inner surface, a plurality of through holes are drilled in the pre-fused powder layer, on one hand, high-temperature inert gas can be filled into the self-setting tennis balls through the through holes, on the other hand, the high-temperature inert gas can conveniently spread from inside to outside, heat is transferred to the surface of the pre-fused powder layer, and the surface of the pre-fused powder layer is heated and micro-fused.
Furthermore, the reticular veins are formed by weaving high-toughness fiber materials and are made of transparent materials, so that the transparency of the PVC antibacterial film is not easily affected by the reticular veins.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) In the preparation process, self-setting tennis balls are added into the master batch, the surface of the self-setting tennis balls is in a micro-melting state through pretreatment operation, and then an admixture containing an antibacterial agent can be adhered to the surfaces of the self-setting tennis balls, the self-setting tennis balls are gradually crushed under the action of stirring mechanical force when the self-setting tennis balls are mixed and stirred with the master batch, reticular veins are preliminarily released from the self-setting tennis balls to form preformed film particles, and then the preformed film particles are heated to be melted, so that the reticular veins are completely released.
(2) The particle size of the master batch in the S1 is micron-sized, and the particle size of the master batch is finer, so that during subsequent melting, on one hand, the time required for melting is reduced, the preparation efficiency is accelerated, on the other hand, the uniformity of the master batch after melting is effectively improved, and the uniformity of the antibacterial film finished product is better.
(3) The specific operation of pretreatment of the self-setting tennis ball in the step S2 comprises the following steps: s21, firstly, filling high-temperature inert gas into the self-coagulating tennis ball for preheating, so that the temperature difference between the self-coagulating tennis ball and the high-temperature inert gas in the next step is reduced, and the heating effect of the high-temperature inert gas on the self-coagulating tennis ball is better; s22, after preheating for 1-2 minutes, extracting a part of inert gas filled in the S21, then filling high-temperature inert gas again, wherein the heat of the high-temperature inert gas spreads from inside to outside to enable the surface of the self-setting tennis ball to be in a micro-melting state, so that the surface of the self-setting tennis ball has adhesion, a mixing agent can be uniformly adhered to the surface of the self-setting tennis ball, the mixing agent and the master batch can be uniformly mixed together with the self-setting tennis ball, the mixing material and the self-setting tennis ball can be mixed with the master batch, and the mixing and the master batch are folded to form a step, so that the preparation efficiency is improved.
(4) The temperature of the high-temperature inert gas is not lower than 150 ℃, the temperature is too low, the surface of the self-setting tennis ball is difficult to melt or does not melt, the adhesion force of the surface of the self-setting tennis ball is small, the combination of the self-setting tennis ball and the mixing agent is influenced, the melting degree of the surface of the pre-melted powder layer is large, the overall strength of the self-setting tennis ball is small, and the self-setting tennis ball is easy to break in advance when the mixing agent is adhered, so that the adhesion of the mixing agent is influenced.
(5) The amount of the inert gas extracted in the step S22 is not less than half of the first filling amount, the temperature of the preheated inert gas is reduced, so that a part needs to be extracted before high-temperature inert gas is filled again, excessive extraction easily causes the internal temperature of the self-condensing tennis ball to be suddenly reduced too much, when the self-condensing tennis ball is filled again, large temperature difference is easily caused, too little extraction is caused, the self temperature is low, and large temperature difference is also caused, so that the micro-melting effect on the self-condensing tennis ball is influenced.
The self-solidifying tennis ball comprises a pre-melting powder layer, the outer end of the pre-melting powder layer is fixedly connected with a plurality of evenly distributed embedded net layers, and reticular veins are embedded in the embedded net layers, when the pre-melting powder layer and the embedded net layers are stirred and mixed, the embedded pre-melting powder layer and the embedded net layers are subjected to stirring mechanical force, the force can impact the embedded net layers and the pre-melting powder layers, so that the embedded net layers and the pre-melting powder layers are broken gradually after being formed by pressing by the mechanical force, the reticular veins are gradually separated from the self-solidifying tennis ball, can be evenly mixed in the pre-film particles along with the continuous stirring action, and compared with the mode that the reticular veins and master batch are directly stirred, the mechanical force of a stirrer directly applied to the reticular veins is small, and is not easy to break due to the stirring force, the integrity of the reticular veins is effectively ensured, the effect of increasing the strength of the antibacterial film finished product is more obvious when the reticular veins are embedded in the antibacterial film finished product, and the defect that the antibacterial film is easy to tear is further effectively remedied.
(6) The pre-melting powder layer and the embedded net layer are formed by pressing a master batch through mechanical force, so that after being stirred and crushed, self-setting tennis balls can also become molten materials after being heated in an extruder and are subjected to injection molding, the added self-setting tennis balls are not easy to influence the injection molding process of plastics, the pressing density of the pre-melting powder layer is gradually reduced from inside to outside, the outer surface is easier to be heated and generates a micro-melting phenomenon compared with the inner surface, a plurality of through holes are formed in the pre-melting powder layer, on one hand, high-temperature inert gas can be filled into the self-setting tennis balls through the through holes, on the other hand, the high-temperature inert gas is convenient to spread from inside to outside, the heat is transferred to the surface of the pre-melting powder layer, and the surface of the pre-melting powder layer is subjected to micro-melting by heating.
(7) The reticular veins are formed by weaving high-toughness fiber materials and are made of transparent materials, so that the transparency of the PVC antibacterial film is not easily influenced by the reticular veins.
Drawings
FIG. 1 is a principal flow diagram of the present invention;
FIG. 2 is a schematic diagram of the pretreatment process of the present invention;
FIG. 3 is a schematic structural view of the self-setting tennis ball of the present invention with the mixture adhering thereto by micro-melting;
FIG. 4 is a schematic view of the structure at A in FIG. 3;
fig. 5 is a schematic structural view of a finished antibacterial film of the present invention.
The reference numbers in the figures illustrate:
1 pre-fused powder layer, 2 embedded net layers and 3 reticular veins.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; rather than all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person of ordinary skill in the art without making any creative effort; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, 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 a specific case to those of ordinary skill in the art.
Example 1:
referring to fig. 1, a process for preparing a PVC antibacterial film with high uniformity includes the following steps:
s1, firstly, grinding and crushing PVC particles, and drying to obtain a master batch for later use;
s2, pretreating the self-setting tennis ball to enable the surface of the self-setting tennis ball to be in a micro-melting state;
s3, uniformly mixing the antifogging agent, the antibacterial agent, the anti-sticking agent and the antistatic agent to obtain a mixture, and then uniformly adhering the mixture to the surface of the micro-molten self-setting tennis ball;
s4, adding the self-setting tennis balls adhered with the mixing agent into the master batch, uniformly stirring and mixing, and breaking the self-setting tennis balls to primarily release reticular veins 3 to obtain pre-formed membrane particles;
s5, referring to fig. 5, putting the pre-film-forming particles into an extruder, heating to enable the pre-film-forming particles to be in a molten state, heating the self-coagulating tennis balls to be completely decomposed, enabling the molten pre-film-forming particles to completely release the interwoven reticular veins 3, namely, the interwoven reticular veins 3 are completely separated from the constraint of the self-coagulating tennis balls, extruding through the extruder, and then sequentially carrying out sheet casting, stretching and heat treatment to obtain the target tear-resistant antibacterial film with high uniformity.
The particle size of the master batch in the S1 is micron-sized, and the master batch is finer and smoother, so that during subsequent melting, on one hand, the time required for melting is shortened, the preparation efficiency is accelerated, and on the other hand, the uniformity of the melted master batch is effectively improved, so that the uniformity of a finished antibacterial film product is better.
Referring to fig. 2, the specific operation of the pretreatment of the self-setting tennis ball in S2 includes the following steps:
s21, firstly, filling high-temperature inert gas into the self-setting tennis ball for preheating, so that the temperature difference between the self-setting tennis ball and the high-temperature inert gas in the next step is reduced, and the heating effect of the high-temperature inert gas on the self-setting tennis ball is better;
s22, after preheating for 1-2 minutes, extracting a part of inert gas filled in the S21, then filling high-temperature inert gas again, wherein the heat of the high-temperature inert gas spreads from inside to outside to enable the surface of the self-setting tennis ball to be in a micro-melting state, so that the surface of the self-setting tennis ball has adhesion, a mixing agent can be uniformly adhered to the surface of the self-setting tennis ball, the mixing agent and the master batch can be uniformly mixed together with the self-setting tennis ball, the mixing material and the self-setting tennis ball can be mixed with the master batch, and the mixing and the master batch are folded to form a step, so that the preparation efficiency is improved.
The temperature of the high-temperature inert gas is not lower than 150 ℃, the temperature is too low, the surface of the self-setting tennis ball is difficult to melt or does not melt, the adhesion force of the surface of the self-setting tennis ball is small, the combination of the self-setting tennis ball and a mixing agent is influenced, the temperature is too high, the melting degree of the surface of the pre-melted powder layer 1 is large, the strength of the whole self-setting tennis ball is small, the self-setting tennis ball is easy to break in advance when the mixing agent is adhered, the adhesion of the mixing agent is influenced, the amount of the inert gas extracted in S22 is not lower than half of the first filling amount, the temperature of the preheated inert gas is reduced, a part needs to be extracted before the high-temperature inert gas is re-filled, the internal temperature of the self-setting tennis ball is suddenly reduced too much, when the high-temperature inert gas is re-filled, a large temperature difference is easy to be extracted, the self temperature is low, and a large temperature difference is also caused, and the micro-melting effect of the self-setting tennis ball is influenced.
Referring to fig. 3-4, the self-setting tennis ball includes a pre-melted powder layer 1, the outer end of the pre-melted powder layer 1 is fixedly connected with a plurality of embedded net layers 2 which are uniformly distributed, the pre-melted powder layer 1 and the embedded net layers 2 are formed by pressing a master batch through mechanical force, so that the self-setting tennis ball after being stirred and crushed can also be melted after being heated in an extruder, and injection molding is performed, so that the injection molding process of plastics is not easily affected by the added self-setting tennis ball, and the pressing density of the pre-melted powder layer 1 is gradually reduced from inside to outside, so that the outer surface is more easily heated to generate micro-melting phenomenon than the inner surface, the embedded net layers 2 are internally embedded with net-shaped veins 3, when being stirred and mixed, the embedded melted powder layer 1 and the net layer 2 are subjected to the mechanical force of stirring, the force can impact the embedded net layer 2 and the pre-melted powder layer 1, so that the stable state of the embedded net-melted layer 2 and the pre-melted powder layer 1 is broken after being pressed by the mechanical force, the embedded net layer 2 and the pre-fused powder layer 1 are gradually crushed, so that the reticular venation 3 is gradually separated from the self-coagulating tennis ball, and can be uniformly mixed in the pre-formed film particles along with the continuous stirring action, compared with the method of directly mixing and stirring the reticular venation 3 and the master batch, the reticular venation 3 has smaller mechanical force which is directly applied to the stirrer and is not easy to break due to the stirring force, so that the integrity of the reticular venation 3 is effectively ensured, the effect of increasing the strength of the finished antibacterial film is more obvious when the antibacterial film is embedded in the finished antibacterial film, the defect that the antibacterial film is easy to tear is effectively overcome, a plurality of through holes are drilled in the pre-fused powder layer 1, on one hand, high-temperature inert gas can be filled into the self-coagulating tennis ball through the through holes, on the other hand, the high-temperature inert gas can conveniently spread from inside to outside, so that the heat can be transferred to the surface of the pre-fused powder layer 1, the surface of the pre-fused powder layer 1 is slightly fused by heating, the reticular veins 3 are formed by weaving high-toughness fiber materials, and the reticular veins 3 are made of transparent materials, so that the transparency of the PVC antibacterial film is not easily influenced by the reticular veins 3.
In the preparation process, self-setting tennis balls are added into the master batch, the surface of the self-setting tennis balls is in a micro-melting state through pretreatment operation, and then an admixture containing an antibacterial agent can be adhered to the surfaces of the self-setting tennis balls, the self-setting tennis balls are gradually crushed under the action of stirring mechanical force when the self-setting tennis balls are mixed and stirred with the master batch, and the reticular venation 3 is gradually separated from the self-setting tennis balls so as to be uniformly mixed in the pre-formed film particles.
The above; are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; those skilled in the art can appreciate that the present invention is not limited to the specific embodiments disclosed herein; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (3)
1. A preparation process of a high-uniformity PVC antibacterial film is characterized by comprising the following steps: the method comprises the following steps:
s1, firstly, grinding and crushing PVC particles, and drying to obtain a master batch for later use;
s2, pretreating the self-setting tennis ball to enable the surface of the self-setting tennis ball to be in a micro-melting state;
the specific operation of the pretreatment of the self-setting tennis ball comprises the following steps:
s21, firstly, filling high-temperature inert gas into the self-solidifying tennis balls for preheating;
s22, after preheating for 1-2 minutes, pumping out a part of inert gas filled in the S21, then filling high-temperature inert gas again, wherein the heat of the high-temperature inert gas spreads from inside to outside, so that the surface of the inert gas is in a micro-melting state;
s3, uniformly mixing the antifogging agent, the antibacterial agent, the anti-sticking agent and the antistatic agent to obtain a mixture, and then uniformly adhering the mixture to the surface of the micro-molten self-setting tennis ball;
s4, adding the self-setting tennis balls adhered with the mixing agent into the master batch, uniformly stirring and mixing, and breaking the self-setting tennis balls to primarily release reticular veins (3) to obtain pre-formed particles;
s5, putting the pre-formed film particles into an extruder, heating to enable the pre-formed film particles to be in a molten state, completely decomposing self-solidifying tennis balls by heating, completely releasing interwoven reticular veins (3) in the molten pre-formed film particles, extruding the granules by the extruder, and then sequentially carrying out sheet casting, stretching and heat treatment to obtain the target tear-resistant antibacterial film with high uniformity;
the self-setting tennis ball comprises a pre-melting powder layer (1), a plurality of uniformly distributed embedded net layers (2) are fixedly connected to the outer end of the pre-melting powder layer (1), and reticular veins (3) are embedded in the embedded net layers (2);
the pre-fused powder layer (1) and the embedded net layer (2) are formed by pressing master batches through mechanical force, the pressing density of the pre-fused powder layer (1) is gradually reduced from inside to outside, and a plurality of through holes are formed in the pre-fused powder layer (1);
the reticular veins (3) are formed by weaving high-toughness fiber materials, and the reticular veins (3) are made of transparent materials;
the temperature of the high-temperature inert gas is not lower than 150 ℃.
2. The preparation process of the high-uniformity PVC antibacterial film as claimed in claim 1, wherein the preparation process comprises the following steps: the particle size of the master batch in the S1 is micron-sized.
3. The preparation process of the high-uniformity PVC antibacterial film as claimed in claim 1, wherein the preparation process comprises the following steps: the amount of the inert gas extracted in the step S22 is not less than half of the first filling amount.
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