阅读说明：本技术 一种农产品保鲜复合膜的制备及生产系统 (Preparation and production system of agricultural product fresh-keeping composite film ) 是由 陈建福 于 2020-12-01 设计创作，主要内容包括：本发明公开一种农产品保鲜复合膜的制备方法,包括以下步骤：称量；原料加热熔融；吹塑成型并牵引；冷却；人字板牵引拉伸；拉伸输送；复合膜表面软化处理；表面镀上防雾层；烘干；收卷；将复合膜牵检验、包装和运输。本发明方法通过电场,使防雾粒子冲击附着于复合膜表面形成防雾层,提高防雾效果。本发明还公开一种生产系统,包括成型装置以及输送辊组,其中,还包括镀膜装置以及收卷辊。本发明系统能够对复合膜施加电场,并加入防雾粒子,利用电场离子冲撞防雾粒子,使防雾粒子可嵌入复合膜内形成防雾层。实现防雾复合膜的自动化生产。(The invention discloses a preparation method of a fresh-keeping composite film for agricultural products, which comprises the following steps: weighing; heating and melting the raw materials; blow molding and drawing; cooling; traction and stretching of the herringbone plate; stretching and conveying; softening the surface of the composite film; plating an antifogging layer on the surface; drying; rolling; and (4) inspecting, packaging and transporting the composite membrane. According to the method, the antifogging particles are impacted and attached to the surface of the composite film through the electric field to form the antifogging layer, so that the antifogging effect is improved. The invention also discloses a production system which comprises a forming device and a conveying roller set, wherein the production system also comprises a film coating device and a winding roller. The system can apply an electric field to the composite film, add the anti-fog particles, and utilize the ions of the electric field to collide the anti-fog particles, so that the anti-fog particles can be embedded into the composite film to form an anti-fog layer. And automatic production of the antifogging composite film is realized.)

1. The preparation method of the agricultural product fresh-keeping composite film is characterized by comprising the following steps:

(1) weighing;

(2) feeding the manufacturing raw materials into a blow molding device, and heating and melting the manufacturing raw materials;

(3) extruding the molten raw materials, performing blow molding through a die and drawing;

(4) carrying out air ring cooling on the blow-molded composite film;

(5) further drawing and stretching through the herringbone plate;

(6) stretching and conveying the composite film;

(7) softening the surface of the composite film;

(8) plating an antifogging layer on the surface of the composite film;

(9) drying the composite membrane;

(10) rolling the dried composite film;

(11) and inspecting, packaging and transporting the rolled composite film.

2. The method for preparing the agricultural product fresh-keeping composite film according to claim 1, wherein the extrusion temperature of the die in the step (3) is 160-170 ℃.

3. The method for preparing the agricultural product fresh-keeping composite film according to claim 1, wherein the blow-molding ratio of the composite film in the step (3) is 2.5-3.

4. The method for preparing a produce refreshing composite film according to claim 1, wherein the draw ratio of the composite film in the step (3) is 4-6.

5. The method for preparing the agricultural product fresh-keeping composite film according to claim 1, wherein the raw material for making the agricultural product fresh-keeping composite film is PE material.

6. A method of producing a produce refreshing composite film according to claim 1, wherein the surface of the composite film is softened by feeding the composite film into the electric roller set to be heated in the step (7).

7. The method of claim 1, wherein the surface of the composite film is softened by heating the composite film in step (7) by feeding the composite film into an ultrasonic heating device.

8. The method according to claim 1, wherein the composite film having a softened surface is fed into a coating apparatus to generate an electric field in the coating apparatus, the anti-fogging particles are fed into the coating apparatus and fed into the electric field, and the ions ionized by the electric field move in the electric field and collide with the anti-fogging particles in the electric field, so that the anti-fogging particles are embedded into the surface of the composite film at a high speed, thereby forming the anti-fogging layer on the surface of the composite film.

9. The method for preparing a composite fresh-keeping film for agricultural products according to claim 1, wherein in the step (9), the composite film is conveyed to a drying device through a conveying roller, and the antifogging layer is dried.

10. The method for preparing a composite fresh-keeping film for agricultural products according to claim 1, wherein in the step (10), the dried composite film is conveyed to a winding roller for winding.

Technical Field

The invention relates to the technical field of production of a fresh-keeping composite film, in particular to a preparation and production system of an agricultural product fresh-keeping composite film.

Background

The composite film is a plastic packaging product, and is usually prepared by polymerization reaction with ethylene as a master batch. The composite film can be mainly used for the occasions of microwave oven food heating, refrigerator food preservation, fresh and cooked food packaging and the like, and has wide application in the fields of food packaging of family life, supermarket stores, hotels and restaurants and industrial production. Because the surface tension of complex film is less, the complex film can condense into the drop of water at the internal surface of complex film after the condensation when keeping fresh agricultural product inside steam, very big influence the luminousness in the wrapping bag for the unable clear observation the condition inside of people, and the drop of water also can produce harm to agricultural product.

In view of the above, the applicant has made an intensive study to solve the above problems and has made the present invention.

Disclosure of Invention

The invention aims to provide a preparation method of a fresh-keeping composite film for agricultural products, which is characterized in that antifogging particles are impacted and attached to the surface of the composite film, so that an antifogging layer is formed, and the antifogging effect of the composite film is improved.

It is another object of the present invention to provide a production system capable of applying an electric field to the surface of a composite film, adding anti-fog particles to the electric field, and colliding the anti-fog particles with ions ionized by the electric field so that the anti-fog particles can be embedded in the composite film at a high speed to form an anti-fog layer. Realize the high-efficient convenient automated production of complex film.

In order to achieve the above purpose, the solution of the invention is:

a preparation method of a fresh-keeping composite film for agricultural products comprises the following steps:

(1) weighing;

(2) feeding the manufacturing raw materials into a blow molding device, and heating and melting the manufacturing raw materials;

(3) extruding the molten raw materials, performing blow molding through a die and drawing;

(4) carrying out air ring cooling on the blow-molded composite film;

(5) further drawing and stretching through the herringbone plate;

(6) stretching and conveying the composite film;

(7) softening the surface of the composite film;

(8) plating an antifogging layer on the surface of the composite film;

(9) drying the composite membrane;

(10) rolling the dried composite film;

(11) and inspecting, packaging and transporting the rolled composite film.

Further, the extrusion temperature of the die in the step (3) is 160-170 ℃.

Further, the blow-up ratio of the blow molding of the composite film in the step (3) is 2.5-3.

Further, the traction ratio of the blow molding of the composite film in the step (3) is 4-6.

Furthermore, the raw material for manufacturing adopts PE material.

Further, in the step (7), the surface of the composite film is softened by feeding the composite film into the electric heating roller group to be heated.

Further, in the step (7), the surface of the composite film is softened by heating the composite film by feeding the composite film into an ultrasonic heating device.

Further, in the step (8), the composite film having the surface softened by heating is fed into a coating apparatus, an electric field is generated in the coating apparatus, the anti-fog particles are fed into the electric field, and the ions ionized by the electric field move and collide with the anti-fog particles in the electric field, so that the anti-fog particles can be embedded into the surface of the composite film at a high speed, thereby forming an anti-fog layer on the surface of the composite film.

Further, in the step (9), the composite film is conveyed to a drying device through a conveying roller, and the antifogging layer is dried.

Further, in the step (10), the dried composite film is conveyed to a winding roller for winding.

By adopting the method, the antifogging particles can be embedded on the surface of the composite film through the electric field to form the antifogging layer, and condensed water molecules on the inner side of the composite film can be attached to the antifogging layer when the composite film is used. The antifogging layer utilizes a special molecular structure of antifogging particle surface activity, one part is a hydrophilic group, the other part is an oleophylic group, the hydrophilic group adsorbs water molecules in air and reduces the surface tension of the water molecules, so that the contact angle between the water molecules and the surface of a transparent object is reduced, the water molecules can be wetted and diffused on the surface of the composite film before water drops are formed, an ultrathin transparent water film is formed, the scattering effect on incident light rays is not generated, the interference on the sight line is not generated, and the antifogging effect is realized. The composite film has a better antifogging function while having a fresh-keeping effect, and the antifogging layer is firmly connected with the composite film and is not easy to fall off, so that the antifogging effect is greatly improved.

The production system based on the preparation method of the agricultural product fresh-keeping composite film comprises a forming device and a conveying roller set, wherein the discharge end of the forming device is connected with the feed end of the conveying roller set, the production system further comprises a film coating device and a winding roller, the film coating device is arranged on the conveying roller set, and the winding roller is arranged at the discharge end of the conveying roller set.

Further, the coating device is provided with a storage bin outside and a coating cavity inside, the coating cavity is provided with a feed inlet and a discharge outlet for the composite film to enter and exit, a plurality of nozzles are arranged in the coating cavity, and the nozzles are communicated with the storage bin.

Further, the conveying roller group comprises a first parallel roller arranged on the outer side of the feeding hole and a second parallel roller arranged on the outer side of the discharging hole, and the first parallel roller and the second parallel roller are arranged in parallel.

The device is characterized by further comprising an electric heating roller set, wherein the electric heating roller set is arranged at a feeding port of the film coating cavity and comprises a first mounting frame and a second mounting frame, the first mounting frame is provided with a first electric heating roller in rotating connection, and the second mounting frame is provided with a second electric heating roller in rotating connection; the first electric heating roller and the second electric heating roller are arranged in parallel.

The drying device is arranged at a discharge port of the coating cavity, the drying device is arranged below the composite membrane, and a hot air port is formed in the upper surface of the drying device.

Further, the conveying roller group further comprises a third parallel roller and a fourth parallel roller which are arranged on two sides of the drying device, and the third parallel roller and the fourth parallel roller are arranged in parallel.

Further, the molding device comprises a blow molding machine and a herringbone plate, the blow molding machine comprises a blow molding mold arranged at the discharge end and a wind ring, and the herringbone plate is arranged above the blow molding mold.

Further, the conveying roller group also comprises a tension adjusting roller, and the tension adjusting roller is arranged at a discharge port of the forming device.

After the structure is adopted, the invention also provides a production system, which can perform blow molding on the composite film, apply an electric field to the surface of the composite film, add the anti-fog particles in the electric field, and utilize the ions ionized by the electric field to collide the anti-fog particles, so that the anti-fog particles can be embedded into the composite film at high speed to form the anti-fog layer. The system can realize rapid film coating, enables the connection between the anti-fog particles and the composite film to be firmer and more reliable, and can effectively avoid the anti-fog layer from falling off, thereby improving the anti-fog time effect.

Drawings

FIG. 1 is a schematic process flow diagram of the preparation method of the present invention.

FIG. 2 is a schematic view of the flow structure of the production system of the present invention.

FIG. 3 is a schematic view of the internal structure of the coating apparatus during coating.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

As shown in fig. 1 to 3, a method for preparing a fresh-keeping composite film for agricultural products, comprising the following steps:

(1) weighing the manufacturing raw materials;

(2) feeding the manufacturing raw materials into a blow molding device, and heating and melting the manufacturing raw materials;

(3) extruding the molten raw materials, performing blow molding through a die and drawing;

(4) carrying out air ring cooling on the blow-molded composite film 6;

(5) further drawing and stretching through the herringbone plate 12;

(6) stretching and conveying the composite film 6 through a traction roller and a tension roller;

(7) feeding the composite film 6 into an electric heating roller set, and softening the surface of the composite film 6 through the electric heating roller set; or the composite film is heated by feeding the composite film into an ultrasonic heating device to soften the surface of the composite film.

(8) Sending the composite film 6 with the surface softened by heating into a coating device 2, generating an electric field in the coating device 2, adding anti-fog particles into the coating device 2, inputting the anti-fog particles into the electric field, and utilizing the movement of ions ionized by the electric field in the electric field to collide the anti-fog particles in the electric field, so that the anti-fog particles can be embedded into the surface of the composite film 6 at high speed, thereby forming an anti-fog layer on the surface of the composite film 6;

(9) conveying the coated composite film 6 to a drying device 5 through a conveying roller, and drying the antifogging layer;

(10) conveying the dried composite film 6 to a winding roller 3 for winding;

(11) and inspecting, packaging and transporting the rolled composite film 6.

By adopting the method, the antifogging particles can be embedded on the surface of the composite film 6 through the electric field to form an antifogging layer, and when the composite film 6 is used, condensed water molecules on the inner side of the composite film 6 can be attached to the antifogging layer. The antifogging layer utilizes a special molecular structure of antifogging particle surface activity, one part is a hydrophilic group, the other part is an oleophylic group, the hydrophilic group adsorbs water molecules in air and reduces the surface tension of the water molecules, so that the contact angle between the water molecules and the surface of a transparent object is reduced, the water molecules can be wetted and diffused on the surface of the composite film 6 before water drops are formed, an ultrathin transparent water film is formed, the scattering effect on incident light rays is not generated, the interference on the light rays is not generated, and the antifogging effect is achieved. Make complex film 6 have better antifog function when having fresh-keeping effect to antifog layer and complex film 6 firm in connection are difficult to drop, have improved antifog ageing greatly.

Preferably, the extrusion temperature of the die in the step (3) is 160-170 ℃. By adopting the method, the extruded composite film 6 has better tensile strength, the surface gloss and the transparency of the composite film 6 are improved, and the product quality is improved.

Preferably, the blow-up ratio of the blow molding of the composite film 6 in the step (3) is 2.5-3, so that the composite film 6 has higher transverse strength, and the composite film 6 is not easy to wrinkle, thereby further improving the product quality.

Preferably, the draw ratio of the composite film 6 in the step (3) is 4-6 during blowing, so that the composite film 6 has stronger longitudinal strength, and the composite film 6 is thinner while avoiding the occurrence of film breakage.

Preferably, the raw materials for manufacturing the artificial leather are made of PE materials, so that the influence on human health is avoided.

A production system based on the preparation method of the agricultural product fresh-keeping composite film comprises a forming device 1 and a conveying roller set, wherein the discharging end of the forming device 1 is connected with the feeding end of the conveying roller set, the production system further comprises a film coating device 2 and a winding roller 3, the film coating device 2 is arranged on the conveying roller set, and the winding roller 3 is arranged at the discharging end of the conveying roller set.

After adopting above-mentioned structure, during operation, forming device 1 heats the melting back with the raw materials, carries out blow molding and cooling to the raw materials through the mould, then transports blow molding's complex film 6 to conveying roller set to exert the electric field through coating device 2 to the surface of complex film 6, adds antifog particle in the electric field simultaneously, utilizes the ion of electric field ionization to collide antifog particle, makes its antifog particle can form antifog layer in embedding complex film 6 at a high speed. The system can realize rapid film coating, enables the connection between the anti-fog particles and the composite film 6 to be firmer and more reliable, and can effectively prevent the anti-fog layer from falling off, thereby improving the anti-fog time effect.

Preferably, the outside of coating device 2 has storage silo 21 and inside has coating film cavity 22, and coating film cavity 22 has feed inlet and discharge gate that supplies 6 business turn over of complex film, and feed inlet and discharge gate department are equipped with the rubber seal and glue the piece to inside sealing of coating film cavity 22, and coating device 2 still is equipped with filter equipment, filters the air that gets into coating film cavity 22, prevents that the dust from getting into in the coating film cavity 22. The coating cavity 22 is internally provided with a plurality of nozzles 221, and the nozzles 221 are communicated with the storage bin 21. After adopting the above structure, in operation, the anti-fog particles are added into the storage bin 21, and are sprayed into the coating cavity 22 through the nozzle 221, in this embodiment, an electric field with an upper surface as a positive electrode and a lower surface as a negative electrode is generated in the coating cavity 22. Negative ions in the electric field can move upwards to impact anti-fog particles, so that the anti-fog particles can be embedded into the lower surface of the composite film 6 at high speed to form an anti-fog layer; in addition, the electrons ionized in the electric field can be attached to the anti-fog particles, so that the anti-fog particles move upwards with negative charges, the embedding amount of the anti-fog particles on the composite film 6 is increased, the anti-fog particles are more firmly connected with the composite film 6, and the anti-fog particles are prevented from falling off.

Preferably, the conveying roller group comprises a first parallel roller 31 arranged outside the feed opening and a second parallel roller 32 arranged outside the discharge opening, and the first parallel roller 31 and the second parallel roller 32 are arranged in parallel with each other. After adopting above-mentioned structure, first parallel roller 31 and second parallel roller 32 carry out tension to the complex film 6 in the coating film cavity 22 and adjust, make its surface can level and smooth extension to adsorb more antifog particles, promote antifog effect. In addition, the composite film 6 can be ensured to be in a horizontal state in the coating cavity 22, and the anti-fog particles can vertically impact and be embedded into the surface of the composite film 6, so that the anti-fog particles are more uniformly and firmly attached.

Preferably, the device also comprises an electric heating roller group, the electric heating roller group is arranged at the feed inlet of the film coating cavity 22 and comprises a first mounting frame 41 and a second mounting frame 42, a first electric heating roller 43 which is connected in a rotating mode is arranged on the first mounting frame 41, and a second electric heating roller 44 which is connected in a rotating mode is arranged on the second mounting frame 42; the first electric heating roller 43 and the second electric heating roller 44 are arranged in parallel. The outer circumferential surfaces of the first electric heating roller 43 and the second electric heating roller 44 are respectively attached to the lower surface and the upper surface of the composite film 6. After adopting above-mentioned structure, the electric heat roller set can carry out hot pressing heat treatment to 6 surfaces of complex film, makes the surface of complex film 6 softer, and the degree of depth on 6 surfaces of embedding complex film of antifog particle is darker for antifog particle adheres to more firmly, further improves antifog ageing.

Preferably, the device further comprises a drying device 5, the drying device 5 is arranged at the discharge outlet of the coating cavity 22, the drying device 5 is arranged below the composite film 6, and the upper surface of the drying device 5 is provided with a hot air port 51. After adopting above-mentioned structure, drying device 5 dries the lower surface of complex film 6, gets rid of the moisture, later carries out the rolling with complex film 6 again. Water molecules in the air are prevented from being attached to the anti-fog layer, so that the surface of the anti-fog layer is kept dry, and the product quality is improved.

Preferably, the set of conveying rollers further includes a third parallel roller 33 and a fourth parallel roller 34 provided at both sides of the drying device 5, and the third parallel roller 33 and the fourth parallel roller 34 are provided in parallel with each other. After adopting above-mentioned structure, third parallel roll 33 and fourth parallel roll 34 can make complex film 6 be in the horizontality on drying device 5 for complex film 6 is dried more evenly, further improves product quality.

Preferably, the molding device 1 comprises a blow molding machine 11 and a gable 12, the blow molding machine 11 comprising a blow mold arranged at the discharge end and a wind ring, the gable 12 being arranged above the blow mold. After adopting above-mentioned structure, the blowing machine 11 is inside melts the raw materials, then extrudes the raw materials and cooperates the blow mold to carry out the blow molding from the discharge end, and the wind ring cools off the compound film 6 of blow molding. The herringbone plate 12 stretches and draws the composite film 6, and prevents the composite film 6 from wrinkling.

Preferably, the conveying roller set further comprises a tension adjusting roller 7, the tension adjusting roller 7 is arranged at a discharge port of the forming device 1, and the outer circumferential surface of the tension adjusting roller 7 abuts against and is attached to the composite film 6, so that the tension of the composite film 6 is adjusted, the composite film 6 is prevented from wrinkling, and the product quality is further improved.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.