CN102205650A - Production process of externally-coated long-acting drip fog-dispersal agricultural functional film - Google Patents

Abstract

The invention discloses a production process of an externally-coated long-acting drip fog-dispersal agricultural functional film and belongs to the field of chemical industry. The production process comprises the following steps of: in a cooling setting period of a polyethylene film, coating a prepared polymer-based nanometre composite material coating solution on a surface of the film by using a soaking device; and solidifying by using remained temperatures of film bubbles at normal temperature to form a dense film having a drip fog-dispersal function so as to obtain the externally-coated long-acting drip fog-dispersal agricultural functional film having a longer drip fog-dispersal duration. In the production process, the film is not subjected to plasma surface treatment or corona surface treatment of the film, and the coating solution is directly coated on the surface of the film, so the completeness of a base material is guaranteed. The drip fog-dispersal period of a coating is long, so the coating has the same service life as the film.

Description

A kind of production technology of outer application type long-acting anti-dropping fog dispersal agricultural functional canopy film

Technical field

The present invention relates to a kind of production technology of outer application type long-acting anti-dropping fog dispersal agricultural functional canopy film, belong to chemical field.

Background technology

Common Shed Film of Polyolefin in use, because the humidity height in the booth, steam is on canopy film inner surface " dewfall " after the interior moisture-saturated of canopy, be condensed into reflective water droplet, not only influence seeing through of light, increased humidity in the canopy, brought out disease, and winter low temperature " frozen water " water droplet is dropped on the crop, causes that plant is damaged to plants caused by sudden drop in temperature, seedling rot and the underproduction.

For solving the common Shed Film of Polyolefin problem of dripping in using, additive process production technology in traditional employing, but the drip fog dispersal type awning film that this technology is made, its drip, fog dispersal lasting period are shorter, and can the loss of function along with fading away of auxiliary agent.The drip fog dispersal type awning film term of validity of PE production of resins is generally at 3～4 months, and the drip fog dispersal type awning film term of validity of EVA production of resins is generally at 4～5 months.The functional membrane of this inner additive type has been owing to added interior interpolation auxiliary agent, thereby reduced the transparent of film; Separating out of drip agent etc. pollutes crop in the canopy and soil easily besides.

Also having a kind of production technology is exactly in the cooling and shaping stage of film surface treatments such as plasma or corona to be carried out on film bubble surface, pass through coating processes again, through large power, electrically heating or infrared firing equipment, form one deck hydrophilic film on the surface of film, then to reach the function of drip, fog dispersal.The agriculture greenhouse film one of this kind explained hereafter is that film surface is handled, and base material is destroyed, and causes performances such as film is ageing-resistant to descend; The 2nd, normal temperature cure in the time of can not realizing online production needs drying plant to force oven dry, energy consumption height.The 3rd is that the product of this explained hereafter exists button canopy initial stage drip weak effect, and detain the canopy long period could drip; After repeatedly opening canopy, finishing canopy, be prone to hang besides and drip a phenomenon, can not form the shortcoming of complete moisture film, cause the drip function to go down very soon or disappear.

Summary of the invention

The objective of the invention is to overcome the problem that exists in the above-mentioned conventional method, a kind of production technology of outer application type long-acting anti-dropping fog dispersal agricultural functional canopy film is provided, the online direct coating of this production technology, normal temperature cure make film have more excellent hydrophily, high transparent, high intensity, good acid-alkali-corrosive-resisting and heat insulating ability.

A kind of production technology principle of outer application type long-acting anti-dropping fog dispersal agricultural functional canopy film is, in the polyolefin film cooling and shaping stage, by infuser device the polymer based nanocomposites masking liquid for preparing is coated to film surface, utilize film to steep surplus temperature, promptly curable under normal temperature condition, form the film with drip fog dispersal function of one deck densification, thereby obtain having long a kind of outer application type long-acting anti-dropping fog dispersal agricultural functional canopy film of drip fog dispersal duration.

Technical scheme of the present invention is: a kind of production technology of outer application type long-acting anti-dropping fog dispersal agricultural functional canopy film comprises the steps:

(1), the polymer based nanocomposites masking liquid for preparing is directly poured in the fermentation vat, the deflector roll in the fermentation vat is soaked fully by masking liquid;

(2), fermentation vat bottom is communicated with the feeding bucket by conduit, controls the liquid level of fermentation vat by the liquid level in the liquid level gauge control feeding bucket, maintenance makes the interior deflector roll of fermentation vat be soaked fully by masking liquid;

(3), the polyolefin film after the blowing is imported in the fermentation vat by deflector roll, the surface of polyolefin film is applied by masking liquid, and the polyolefin film after masking liquid applies is derived fermentation vat through deflector roll, wipes unnecessary masking liquid off through scraper, derive through nip rolls, the conduction of velocity of polyolefin film is 20m/min again;

(4), polyolefin film utilizes the surplus temperature of film bubble self, and is promptly curable under normal temperature condition;

(5), by traction wrap-up or folding device, with the polyolefin film rolling after applying, the dress bag promptly get the outer application type long-acting anti-dropping agricultural functional canopy film that disperses fog.

In the above-mentioned steps (4), for further shortening hardening time, available drying unit is dried it.

Beneficial effect of the present invention is: production technology of the present invention is not carried out surface treatments such as plasma or corona to film, directly masking liquid is coated onto film surface, thereby guarantees the integrity of base material.It is long that coating has the drip fog dispersal phase, can reach synchronous with the film lifetime; Behind the button canopy, steam can form complete moisture film on the film surface fast in the canopy, and it is fast to have the drip effect, does not hang the advantage of dripping; Transparency can reach more than 93% simultaneously, very helps growing of crops, alleviates disease, improves the yield and quality of crops.

Description of drawings

Accompanying drawing is a case process flow chart of the present invention;

Description of drawings: 1 polyethylene film, 2 deflector rolls, 3 feeding buckets, 4 masking liquids, 5 fermentation vats, 6 nip rolls, the polyethylene film after 7 coatings, 8 scrapers.

The specific embodiment

Embodiment 1

In the polyethylene film cooling and shaping stage, by infuser device the polymer based nanocomposites masking liquid for preparing is coated to film surface, utilize film to steep surplus temperature, promptly curable under normal temperature condition, form the film with drip fog dispersal function of one deck densification, thereby obtain having long a kind of outer application type long-acting anti-dropping fog dispersal agricultural functional canopy film of drip fog dispersal duration.

Concrete production technology comprises the steps:

(1), will prepare polymer based nanocomposites masking liquid 4 pour in the fermentation vat 5, the deflector roll in the fermentation vat is soaked by masking liquid fully;

(2), fermentation vat 5 bottoms are communicated with feeding bucket 3 by conduit, control the liquid level of fermentation vat by the liquid level in the liquid level gauge control feeding bucket, keep making the deflector roll in the fermentation vat to be soaked fully by masking liquid;

(3), the polyethylene film after the blowing 1 is imported in the fermentation vat by deflector roll 2, the surface of polyethylene film is applied by masking liquid, polyethylene film after masking liquid applies is derived fermentation vat through deflector roll, wipe unnecessary masking liquid off through scraper 8, derive through nip rolls 6 again, the conduction of velocity of polyethylene film is 20m/min, and the polyethylene film surface after nip rolls 6 makes coating is more smooth;

(4), polyethylene film utilizes the surplus temperature of film bubble self, promptly curable under normal temperature condition, for further shortening hardening time, also available drying unit is dried it;

(5), by traction wrap-up or folding device, with polyethylene film 7 rollings after applying, the dress bag promptly get the outer application type long-acting anti-dropping agricultural functional canopy film that disperses fog.

Embodiment 2

In the eva film cooling and shaping stage, by infuser device the polymer based nanocomposites masking liquid for preparing is coated to film surface, utilize film to steep surplus temperature, promptly curable under normal temperature condition, form the film with drip fog dispersal function of one deck densification, thereby obtain having long a kind of outer application type long-acting anti-dropping fog dispersal agricultural functional canopy film of drip fog dispersal duration.

Concrete production technology comprises the steps:

(1), will prepare the polymer based nanocomposites masking liquid pour in the fermentation vat, the deflector roll in the fermentation vat is soaked by masking liquid fully;

(2), fermentation vat bottom is communicated with the feeding bucket by conduit, controls the liquid level of fermentation vat by the liquid level in the liquid level gauge control feeding bucket, maintenance makes the interior deflector roll of fermentation vat be soaked fully by masking liquid;

(3), the eva film after the blowing is imported in the fermentation vat by deflector roll, the surface of eva film is applied by masking liquid, eva film after masking liquid applies is derived fermentation vat through deflector roll, wipe unnecessary masking liquid off through scraper, derive through nip rolls again, the conduction of velocity of eva film is 20m/min, and the eva film surface after nip rolls makes coating is more smooth;

(4), eva film utilizes the surplus temperature of film bubble self, promptly curable under normal temperature condition, for further shortening hardening time, also available drying unit is dried it;

(5), by traction wrap-up or folding device, with the eva film rolling after applying, the dress bag promptly get the outer application type long-acting anti-dropping agricultural functional canopy film that disperses fog.

Claims (2)

1. the production technology of an outer application type long-acting anti-dropping fog dispersal agricultural functional canopy film is characterized in that, comprises the steps:

(1), the polymer based nanocomposites masking liquid for preparing is directly poured in the fermentation vat, the deflector roll in the fermentation vat is soaked fully by masking liquid;

(2), fermentation vat bottom is communicated with the feeding bucket by conduit, controls the liquid level of fermentation vat by the liquid level in the liquid level gauge control feeding bucket, maintenance makes the interior deflector roll of fermentation vat be soaked fully by masking liquid;

(3), the polyolefin film after the blowing is imported in the fermentation vat by deflector roll, the surface of polyolefin film is applied by masking liquid, and the polyolefin film after masking liquid applies is derived fermentation vat through deflector roll, wipes unnecessary masking liquid off through scraper, derive through the folder rod, the conduction of velocity of polyolefin film is 20m/min again;

(4), polyolefin film utilizes the surplus temperature of film bubble self, and is promptly curable under normal temperature condition;

(5), by traction wrap-up or folding device, with the polyolefin film rolling after applying, the dress bag promptly get the outer application type long-acting anti-dropping agricultural functional canopy film that disperses fog.

2. the production technology of a kind of outer application type long-acting anti-dropping fog dispersal agricultural functional canopy film according to claim 1 is characterized in that in the described step (4), also available drying unit is dried polyolefin film.

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