阅读说明：本技术 一种农药阻隔瓶用粘接树脂及其制备方法 (Adhesive resin for pesticide barrier bottle and preparation method thereof ) 是由 杨少辉 毕宏海 储江顺 孙晓光 李楠 李薇薇 黄健 于 2020-12-25 设计创作，主要内容包括：本发明公开了一种农药阻隔瓶用粘接树脂及其制备方法,所述粘接树脂包括以下重量份数的组分：高密度聚乙烯25-50份、改性线性低密度聚乙烯20-40份、乙烯共聚物10-30份、弹性体1-10份、助剂0.1-3份。上述农药阻隔瓶用粘接树脂的制备方法,包括如下步骤：S1、按上述质量分数称取所述高密度聚乙烯、改性线性低密度聚乙烯烯、乙烯共聚物、弹性体和助剂,并加入到高速混合机中,混合均匀；S2、将经步骤S1混合均匀后的物料加入到双螺杆挤出机中挤出,挤出料条通过循环水槽冷却至室温,经过吹风机吹风干燥后进入切粒机造粒,制得农药阻隔瓶用粘接树脂。本发明的粘接树脂的粘接强度有较大提升,能够很好的解决农药包装用阻隔瓶的生产质量的问题,提高其使用性能。(The invention discloses a bonding resin for a pesticide barrier bottle and a preparation method thereof, wherein the bonding resin comprises the following components in parts by weight: 25-50 parts of high-density polyethylene, 20-40 parts of modified linear low-density polyethylene, 10-30 parts of ethylene copolymer, 1-10 parts of elastomer and 0.1-3 parts of auxiliary agent. The preparation method of the bonding resin for the pesticide barrier bottle comprises the following steps: s1, weighing the high-density polyethylene, the modified linear low-density polyethylene, the ethylene copolymer, the elastomer and the auxiliary agent according to the mass fraction, adding into a high-speed mixer, and uniformly mixing; and S2, adding the uniformly mixed material obtained in the step S1 into a double-screw extruder for extrusion, cooling the extruded material strips to room temperature through a circulating water tank, drying the extruded material strips by blowing air through a blower, and then granulating the dried material strips in a granulator to obtain the adhesive resin for the pesticide barrier bottle. The bonding strength of the bonding resin is greatly improved, the problem of production quality of barrier bottles for pesticide packaging can be well solved, and the use performance of the barrier bottles is improved.)

1. The bonding resin for the pesticide barrier bottle is characterized by comprising the following components in parts by weight:

2. the bonding resin for pesticide barrier bottles of claim 1, wherein the high density polyethylene has a density of 0.941 to 0.952g/cm³The melt index at 190 ℃ under a 2.16kg load is 2.0-8.0g/10min, and the molecular weight is 50000-70000.

3. The bonding resin for the pesticide barrier bottle as claimed in claim 1, wherein the modified linear low density polyethylene is maleic anhydride grafted linear low density polyethylene, and the grafting rate of the maleic anhydride is 1.0-1.5%.

4. The bonding resin for pesticide barrier bottles of claim 1, wherein the modified linear low density polyethylene has a density of 0.920 to 0.950g/cm³The melt index at 190 ℃ under a 2.16kg load is 2.0-4.0g/10 min.

5. The bonding resin for the pesticide barrier bottle as claimed in claim 1, wherein the ethylene copolymer is one or more selected from ethylene-acrylic acid copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer and ethylene-butyl acrylate copolymer.

6. The bonding resin for pesticide barrier bottles as claimed in claim 1, wherein the elastomer is selected from one or more of ethylene-propylene copolymer (EPDM), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-butadiene rubber (SBR).

7. The bonding resin for the pesticide barrier bottle as claimed in claim 1, wherein the auxiliary agent is one or more selected from an antioxidant, a coupling agent, an anti-aging agent, an antistatic agent and a heat stabilizer.

8. The preparation method of the bonding resin for the pesticide barrier bottle as claimed in any one of claims 1 to 7, which is characterized by comprising the following steps:

s1, weighing the high-density polyethylene, the modified linear low-density polyethylene, the ethylene copolymer, the elastomer and the auxiliary agent according to the mass fraction, adding into a high-speed mixer, and uniformly mixing;

and S2, adding the uniformly mixed material obtained in the step S1 into a double-screw extruder for extrusion, cooling the extruded material strips to room temperature through a circulating water tank, drying the extruded material strips by blowing air through a blower, and then granulating the dried material strips in a granulator to obtain the adhesive resin for the pesticide barrier bottle.

9. The method for preparing the bonding resin for the pesticide barrier bottle as claimed in claim 8, wherein in S2, the temperature of each temperature zone of the twin-screw extruder is 180-210 ℃.

Technical Field

The invention relates to the technical field of chemical material synthesis, in particular to a bonding resin for a pesticide barrier bottle and a preparation method thereof.

Background

With the increasing attention on environmental protection and energy problems, many polymer materials with barrier properties to various liquids and gases are gradually replacing the traditional materials in the applications of coatings, pesticides and other chemical raw materials, food packaging industry and automobile fuel tank manufacturing industry. There are many problems associated with the use of a single polymeric material. Such as environmental impact on the barrier properties of the material, excessive cost, problems in processing and preparation, etc., and it is also desirable to improve the technology to obtain materials with more excellent barrier properties.

The function of the barrier plastic bottle is particularly prominent in the pesticide packaging industry. The main properties of barrier bottles include: 1. has good mechanical property, 3 to 5 times of impact strength of other films and good folding endurance. 2. Oil resistance, fat resistance, dilute acid resistance, dilute alkali resistance and most solvents resistance. 3. The high-temperature and low-temperature resistant rubber has excellent high-temperature and low-temperature resistance, can be used for a long time within the temperature range of 120 ℃, can resist high temperature of 150 ℃ and low temperature of-70 ℃ in a short time, and has little influence on the mechanical properties of the rubber at high and low temperatures. 4. Low gas and water vapor permeability, and excellent gas, water, oil and odor barrier properties. In order to produce plastic bottles with high barrier properties, the quality of the adhesive resin product for barrier bottles plays a decisive role in the formation of the layer structure of the barrier material. Therefore, the research and the technical accumulation of the special bonding resin for the high-barrier bottle are also one of the ways for effectively serving the barrier container industry and establishing authority in the industry.

Disclosure of Invention

The invention aims to provide a bonding resin for a pesticide barrier bottle and a preparation method thereof, aiming at the defects in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that:

the invention provides a bonding resin for a pesticide barrier bottle, which comprises the following components in parts by weight:

preferably, the high density polyethylene has a density of 0.941 to 0.952g/cm³The melt index at 190 ℃ under a 2.16kg load is 2.0-8.0g/10min, and the molecular weight is 50000-70000.

Preferably, the modified linear low density polyethylene is maleic anhydride grafted linear low density polyethylene, wherein the grafting ratio of the maleic anhydride is 1.0-1.5%.

Preferably, the modified linear low density polyethylene has a density of 0.920 to 0.950g/cm³The melt index at 190 ℃ under a 2.16kg load is 2.0-4.0g/10 min.

Preferably, the ethylene copolymer is selected from one or more of ethylene-acrylic acid copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer and ethylene-butyl acrylate copolymer.

Preferably, the elastomer is selected from one or more of ethylene-propylene copolymer (EPDM), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-butadiene rubber (SBR).

Preferably, the auxiliary agent is selected from one or more of an antioxidant, a coupling agent, an anti-aging agent, an antistatic agent and a heat stabilizer.

The second aspect of the invention provides a preparation method of the bonding resin for the pesticide barrier bottle, which comprises the following steps:

s1, weighing the high-density polyethylene, the modified linear low-density polyethylene, the ethylene copolymer, the elastomer and the auxiliary agent according to the mass fraction, adding into a high-speed mixer, and uniformly mixing;

and S2, adding the uniformly mixed material obtained in the step S1 into a double-screw extruder for extrusion, cooling the extruded material strips to room temperature through a circulating water tank, drying the extruded material strips by blowing air through a blower, and then granulating the dried material strips in a granulator to obtain the adhesive resin for the pesticide barrier bottle.

Preferably, in S2, the temperature of each temperature zone of the twin-screw extruder is 180-210 ℃.

By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:

the bonding strength of the bonding resin is greatly improved, the problem of production quality of barrier bottles for pesticide packaging can be well solved, and the use performance of the barrier bottles is improved.

Detailed Description

The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

Example 1

The raw materials and parts by weight of the adhesive resin in this example are as follows:

in this example, the high density polyethylene had a density of 0.945g/cm³A melt index of 2.0g/10min (190 ℃ C., under a 2.16kg load) and a molecular weight of 50000;

in this example, the modified linear low density polyethylene had a density of 0.930g/cm³A melt index of 4.0g/10min (190 ℃ C., under a 2.16kg load); the modified linear low-density polyethylene is maleic anhydride grafted linear low-density polyethylene, wherein the grafting rate of maleic anhydride is 1.3%;

in this example, the ethylene copolymer was an ethylene-vinyl acetate copolymer having a monomer content of vinyl acetate of 28% and a melt index of 15g/10min (190 ℃, under a 2.16kg load);

the preparation method of the adhesive resin by adopting the materials mainly comprises the following steps:

s1, weighing the raw materials according to the proportion, and uniformly mixing the raw materials by using a high-speed mixer;

and S2, adding the uniformly mixed material obtained in the step S1 into a double-screw extruder for extrusion, wherein the temperature of each temperature zone of the double-screw extruder is 180 ℃, cooling the extruded material strips to room temperature through a circulating water tank, drying the extruded material strips by blowing air through a blower, and then granulating the extruded material strips in a granulator to obtain the adhesive resin for the pesticide barrier bottle.

Example 2

The raw materials and parts by weight of the adhesive resin in this example are as follows:

in this example, the high density polyethylene had a density of 0.950g/cm³A melt index of 4.0g/10min (190 ℃, under a 2.16kg load) and a molecular weight of 60000;

in this example, the modified linear low density polyethylene had a density of 0.940g/cm³The melt index was 3.0g/10min (190 ℃ C., under a 2.16kg load); the modified linear low-density polyethylene is maleic anhydride grafted linear low-density polyethylene, wherein the grafting rate of maleic anhydride is 1.5%;

in this example, the ethylene copolymer was an ethylene-acrylic acid copolymer having a monomer content of acrylic acid of 10% and a melt index of 35g/10min (190 ℃, under a 2.16kg load);

the preparation method of the adhesive resin by adopting the materials mainly comprises the following steps:

s1, weighing the raw materials according to the proportion, and uniformly mixing the raw materials by using a high-speed mixer;

and S2, adding the uniformly mixed material obtained in the step S1 into a double-screw extruder for extrusion, wherein the temperature of each temperature zone of the double-screw extruder is 200 ℃, cooling the extruded material strips to room temperature through a circulating water tank, drying the extruded material strips by blowing air through a blower, and then granulating the extruded material strips in a granulator to obtain the adhesive resin for the pesticide barrier bottle.

Example 3

The raw materials and parts by weight of the adhesive resin in this example are as follows:

in this example, the high density polyethylene had a density of 0.952g/cm³The melt index is 6.0g/10min (190 ℃, under the load of 2.16 kg), and the molecular weight is 70000;

in this example, the modified linear low density polyethylene had a density of 0.950g/cm³The melt index was 2.0g/10min (190 ℃ C., under a 2.16kg load); the modified linear low-density polyethylene is maleic anhydride grafted linear low-density polyethylene, wherein the grafting rate of maleic anhydride is 1.1%;

in this example, the ethylene copolymer was an ethylene-ethyl acrylate copolymer having a monomer content of ethyl acrylate of 15% and a melt index of 12g/10min (190 ℃, under a 2.16kg load);

the preparation method of the adhesive resin by adopting the materials mainly comprises the following steps:

s1, weighing the raw materials according to the proportion, and uniformly mixing the raw materials by using a high-speed mixer;

and S2, adding the uniformly mixed material obtained in the step S1 into a double-screw extruder for extrusion, wherein the temperature of each temperature zone of the double-screw extruder is 210 ℃, cooling the extruded material strips to room temperature through a circulating water tank, drying the extruded material strips by blowing air through a blower, and then granulating the extruded material strips in a granulator to obtain the adhesive resin for the pesticide barrier bottle.

Application example

The adhesive resins of examples 1 to 3 were subjected to the following experiments:

the peel strength of the adhesive resin was measured in units of N/25mm according to the requirements of the national standard GB/T2791, and the results are shown in Table 1:

TABLE 1

	Example 1	Example 2	Example 3	Commercially available product
					Peel strength	145	120	114	70-100

As can be seen from the data in Table 1, the peel strength of the adhesive resin of the present invention was 114-145N/25 mm.

In conclusion, the bonding strength of the bonding resin prepared by the method provided by the invention in the embodiments 1-3 is greatly improved, the bonding resin is applied to the production of the barrier bottle, the stability of the composite structure of the barrier bottle can be ensured, the polyethylene layer of the barrier bottle and the barrier layer are bonded more firmly, and the drop test, the hydrostatic test, the high-temperature stacking test, the anti-permeability performance and the like of the barrier bottle are improved. Can also solve the safety problems of leakage, seepage and the like when the pesticide is packaged in the separation bottle. Therefore, the adhesive resin for the pesticide barrier bottle can well solve the problem of production quality of the pesticide barrier bottle and improve the service performance of the pesticide barrier bottle.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.