Black mulch film for tobaccos and preparation method of black mulch film

A black mulch film and technology for cigarettes, applied in the field of black mulch film for cigarettes and its preparation, can solve the problems of physical and mechanical property strength decline, easy aging, high light transmittance of the mulch film, etc., and achieve the convenience of mechanical and manual recycling and the strength of mechanical properties High and reduce the effect of recycling cost

Active Publication Date: 2019-03-08
YUNNAN QUJING PLASTICS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are mainly the following problems in the mulch film used for cigarettes: First, the physical and mechanical properties and strength of the plateau area decrease rapidly, and the mulch film is easy to age and breaks early.
The method that adopts nano-calcium carbonate to strengthen the masterbatch is arranged in agricultural mulch production at present, as the patent No. is the nanometer material modified weather-resistant mulch film of CN200510126573. The mulch film prepared by them improves the strength of the mulch film to a certain extent, but reduces the light transmittance of the mulch film to a certain extent, which affects the quality of the mulch film and the efficiency of crop cultivation; Weeding function; the transmittance is too small, which affects the growth of tobacco, so the transmittance of tobacco mulch is one of the important factors affecting the growth of tobacco

Method used

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  • Black mulch film for tobaccos and preparation method of black mulch film
  • Black mulch film for tobaccos and preparation method of black mulch film
  • Black mulch film for tobaccos and preparation method of black mulch film

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preparation example Construction

[0111] The preparation method of compound (A) described in the application, by weight, comprises the following steps:

[0112] (1) Weigh a certain amount of p-phenylene diisocyanate, containing R 1 Hydroxyl-terminated hydrocarbons of the group, containing R 2 The hydroxyl-terminated hydrocarbon of the group, the catalyst dibutyltin dilaurate and the solvent;

[0113] (2) Add the above-mentioned substances into a three-necked bottle equipped with a reflux condenser, a stirrer, a thermometer and protected by nitrogen, and react at 60-80° C. for 3-20 hours to obtain the product.

[0114] Among them, p-phenylene diisocyanate, containing R 1 Hydroxyl-terminated hydrocarbons of the group, containing R 2 The molar ratio of hydroxyl-terminated hydrocarbons in the group is 1:(0.5-2):(0.5-2).

[0115] The catalyst dibutyltin dilaurate is 0.3-10 wt% of p-phenylene diisocyanate.

[0116] The solvent is at least one selected from toluene, nitrobenzene, ethyl acetate and dioxane.

[0...

Embodiment 1

[0131] This embodiment 1 provides a kind of black mulching film for cigarettes, which comprises the following components by weight:

[0132] The first linear low density polyethylene: 50 parts;

[0133] The second linear low density polyethylene: 10 parts;

[0134] Black masterbatch: 1 part;

[0135] The melt index of the first linear low density polyethylene is 1 g / 10 min, and the melt index of the second linear low density polyethylene is 0.5 g / 10 min.

[0136] The first linear low density polyethylene (brand name: LL 3301.34) was purchased from ExxonMobil Corporation.

[0137] The second linear low density polyethylene (brand name: LL-3105) was purchased from ExxonMobil Corporation.

[0138] The black masterbatch, in parts by weight, includes the following components: 5 parts of the third linear low density polyethylene, 5 parts of low density polyethylene, 20 parts of carbon black, 0.1 part of BHT immobilized by metal complexes, polypropylene 0.5 parts of wax, 0.4 part...

Embodiment 2

[0156] This embodiment 2 provides a kind of black mulching film for cigarettes, which comprises the following components by weight:

[0157] The first linear low density polyethylene: 90 parts;

[0158] The second linear low density polyethylene: 40 parts;

[0159] Black masterbatch: 10 parts;

[0160] The melt index of the first linear low density polyethylene is 6.8g / 10min, and the melt index of the second linear low density polyethylene is 5g / 10min.

[0161] The first linear low density polyethylene (brand name: LL-8556) was purchased from ExxonMobil Corporation.

[0162] The second linear low density polyethylene (brand name: LL6301RQ) was purchased from ExxonMobil Corporation.

[0163] The black master batch includes the following components in parts by weight: 50 parts of the third linear low-density polyethylene, 50 parts of low-density polyethylene, 90 parts of carbon black, 3 parts of metal complex-supported BHT, polypropylene 15 parts of wax, 12 parts of compound...

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Abstract

The invention relates to the field of agricultural mulch films, in particular to a black mulch film for tobaccos and a preparation method of the black mulch film. The black mulch film is prepared from, by weight, 50-90 parts of first linear low-density polyethylene, 10-40 parts of second linear low-density polyethylene and 1-10 parts of black masterbatch. The black masterbatch is prepared from, byweight, 5-50 parts of third linear low-density polyethylene, 5-50 parts of low-density polyethylene, 20-90 parts of carbon black and 1-30 parts of an auxiliary agent. The black mulch film for tobaccos is high in mechanical strength and convenient to recover mechanically and manually, the recovery rate is increased, and recovery cost reduction is realized; the transmittance of the black mulch filmis in a range of 25%-30%, the grass control rate reaches 90% or above, soil heat can be better preserved, adverse effects of extreme high temperature on tobacco growth can be avoided, and the dry tobacco yield of a tobacco field mulched with the black mulch film is 1.57% higher than that of a tobacco field mulched with a transparent mulch film.

Description

technical field [0001] The invention relates to the field of agricultural mulch, in particular to a black mulch for tobacco and a preparation method thereof. Background technique [0002] my country is the country with the largest amount of agricultural plastic film, mainly including shed film and mulch film. Among them, plastic film mulching cultivation is a new cultivation technique to improve the quality and yield of crops, and it has the functions of heat preservation, moisture conservation and frost prevention. Tobacco mulch film has become one of the indispensable cultivation technical measures in the tobacco industry. The mulch film for cigarettes is mainly made of polyethylene blow molding, with linear low-density polyethylene, high-density polyethylene, and low-density polyethylene as the main raw material or blended with other resins, adding other functional additives, and blow molding. become. The application of polyethylene film for cigarettes has greatly impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L23/12C08K5/205C08K5/092C08J5/18A01G13/02
CPCA01G13/0275C08J5/18C08J2323/08C08J2423/06C08J2423/08C08J2423/12C08K5/092C08K5/205
Inventor 卢斌卢建书汤云安李秀琴王宗方王建桥
Owner YUNNAN QUJING PLASTICS GROUP
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