CN101418096A - Inner additive type blow molding agricultural long-acting non drip defogging film - Google Patents

Abstract

The invention relates to an internal additive type blow molding agricultural long-acting non-drop fog dispersal film, which consists of two or three kinds of colorless agricultural polyvinyl (containing EVA resin), and comprises the following raw materials in weight percentage: 10 to 20 percent of long-acting non-drop fog dispersal master batch, 80 to 90 percent of linear low density polyethylene resin, and the like. The agricultural long-acting non-drop fog dispersal film formed by blow molding according to the formulation can prolong drip fog dispersal period by 60 days, namely increasing to more than 160 days from about 100 days of a non-drop fog dispersal period of a common internal additive type blow molding agricultural long-acting non-drop fog dispersal film, and increases light transmittance and heat-insulating property of the film simultaneously. The film improves combination property of an agricultural large canopy film, can remarkably improve yield and quality of overwintering greenhouse vegetable and fruit trees covered by the film, and has better popularization and application prospects.

Description

The inner additive type blow molding agricultural long-acting non drip defogging film

(1) invention field:

The invention belongs to the farm plastic greenhouse film product.

(2) technical background:

Though specification (width, thickness) has broad variety, there are following shortcoming in production at present and the farm plastic greenhouse film of using in production application: the one, and the film drip phase fog dispersal phase is short, general three to four months promptly about 100 days; The 2nd, insulation and printing opacity particularly thorny, printing opacity is just poor for a long time promptly to add heat preserving agent; The 3rd, drip and fog dispersal are collaborative bad, promptly the film that drip is good often disperse fog bad, the drip poor performance that fog dispersal is good.

(3) summary of the invention:

The present invention provides a kind of inner additive type blow molding agricultural long-acting non drip defogging film, film drip 60 days phases of fog dispersal can be prolonged,, insulation character and illumination transit dose can be improved to adapt to the requirement of plant growth better, promote that crop growth is good, improve crop yield and quality.

Technical scheme of the present invention is: carried out new improvement and perfect at the deficiency that agricultural anti-drop defogging film exists, concrete improvement content is: selected rational dripless agent and antifogging agent, scientific matching, solve and do not have the contradiction of dripping and dispersing fog, select the appropriate resin proportioning, and the rational formula of heat preserving agent and protective agent.

Concrete raw material composition is: LLDPE (LLDPE), new LDPE (film grade) (LDPE), ethene one acetate ethylene copolymer (EVA) and masterbatch; The composition of masterbatch is made up of following raw material: LLDPE powder, dripless agent KF650, dripless agent CF-702, dripless agent LA-2, heat preserving agent hydrotalcite, oxidation inhibitor B215, photostabilizer 944, photostabilizer 622 and antifogging agent AF18 or AF23 any.

The finished product long-acting non drip defogging film has functions such as anti-drop defogging phase length, quick heating, good heat insulation, very helps growing of farm crop, alleviates disease, improves the yield and quality of farm crop, and can save farm crop field management and expense, increases farmers' income.

(4) description of drawings:

Fig. 1, inner additive type agricultural long-acting non drip defogging film processing process figure.

Among the figure: 1, LLDPE, 2, dripless agent LA-2,3, dripless agent KF650,4, dripless agent CF-702,5, the heat preserving agent hydrotalcite, 6, oxidation inhibitor B215,7, photostabilizer 944,8, photostabilizer 622,9, antifogging agent AF-18 or AF23,10, add hot milling and extrude the wire drawing cooling and dicing, 11, LLDPE, 12, new LDPE (film grade), 13, ethene one acetate ethylene copolymer, 14, mix, 15, add hot milling and extrude, 16, blowing, 17, finished product.

(5) embodiment:

The present invention be continue this seminar after developing fog dispersal type polyvinyl chloride in 97 years at home first and not having the awning film of dripping, produce and use in problem such as lack at polyethylene dripless defogging film anti-drop defogging, and directly influence crop grow and output and quality are developed, do not have the technology of dripping film based on former polyethylene fog dispersal, solve the problem that exists.Be as the criterion each raw materials by weight meter with marketable material.

In conjunction with Fig. 1, subordinate list 1 and subordinate list 2, the concrete work program of this product and require as follows: at first prepare masterbatch, masterbatch accounts for the 10-20% (10) of this product gross weight, the weight ratio of each composition of masterbatch is: LLDPE powder 70-85% (1), dripless agent LA-2 4-8% (2), dripless agent KF650 4-8% (3), and dripless agent CF-702 4-8% (4).Heat preserving agent hydrotalcite 3-6% (5), oxidation inhibitor B2150.5-1.5% (6), photostabilizer 944 1-3% (7), photostabilizer 622 1-3% (8) and antifogging agent AF-18 or AF-23 1-2% (9).With the mixing wire drawing cooling and dicing of extruding of above each raw material thorough mixing even heating, promptly become the alleged masterbatch of the present invention (10).The master batch (10) that will account for this product gross weight 10-20% then and the LLDPE (11) that accounts for this product gross weight 20-40%, 20-40% LDPE (12) and 20-40% EVA (13) uniform mixing (14), again mixed uniformly raw material is added hot milling and extrude (15) blowing (16), to finished product warehouse-in (17).Above complete processing is source mill's common process technology.

Crops such as booth winter hard vegetable, fruit tree, generally detain canopy and take off canopy to May in the coming year in northern September, booth has the phase of dripping to reach 6-7 months, not having a phase of dripping as the canopy film reached more than 6 months, do not have fog again and produce and just can satisfy the north greenhouse cultivation needs of surviving the winter, require canopy film heat retaining property to get well simultaneously, transmittance is wanted height, give good environment space of crop growth creation in the booth, to realize the target of high-quality and efficient production.

This product processes is simple, and it is convenient to use, and is applicable to that the greenhouse cultivation of Different Crop covers, and popularizing application prospect is preferably arranged.

Table-1 blown film raw material weight ratio

Table-2 masterbatch raw material weight ratios

Claims (2)

1, a kind of inner additive type blow molding agricultural long-acting non drip defogging film, it is characterized in that this film is by masterbatch 10-20%, LLDPE 20-40%, new LDPE (film grade) 20-40% and ethene-acetate ethylene copolymer 20-40% are formed, its each raw material composition is counted by weight ratio, with it mixed milling blowing film forming.

2, a kind of inner additive type blow molding agricultural long-acting non drip defogging film according to claim 1, it is characterized in that masterbatch is made up of LLDPE 70-85%, dripless agent LA-2 4-8%, dripless agent KF650 4-8%, dripless agent CF-702 4-8%, heat preserving agent hydrotalcite 3-6%, oxidation inhibitor B215 0.5-1.5%, photostabilizer 944 1-3%, photostabilizer 622 1-3% and antifogging agent AF-18 or AF-23 1-2%, with it mixing wire drawing cooling and dicing.

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