WO2021103081A1

WO2021103081A1 - Environmentally friendly water purification functional masterbatch and preparation method therefor

Info

Publication number: WO2021103081A1
Application number: PCT/CN2019/123152
Authority: WO
Inventors: 台启龙; 赵进文
Original assignee: 苏州和塑美科技有限公司
Priority date: 2019-11-30
Filing date: 2019-12-05
Publication date: 2021-06-03
Also published as: CN110776694A

Abstract

An environmentally friendly water purification functional masterbatch. The masterbatch comprises the following components: 5-15 parts polyester resin, 35-45 parts polyolefin resin, 40-50 parts mineral powder, and 5-10 parts of a degradable resin polymer. Further comprised is a preparation method for the masterbatch: the polyester resin, polyolefin resin, and degradable resin polymer are added into a mixing drum for uniform mixing, the mixed material and the mineral powder are added into an extruder, the temperature of the extruder is adjusted to be 170-220°C, the mixture is extruded and granulated, and the surfaces of extruded particles have concave and convex thread shapes.

Description

Environment-friendly water purification functional masterbatch and preparation method thereof

Technical field

The invention relates to the manufacturing field of the resin mineral field, in particular to an environment-friendly water purification functional masterbatch and a preparation method.

Background technique

Water plays an important role in people's lives. It is the source of life and one of the most important material resources indispensable for human survival and development. In modern industry, no industrial sector does not use water, and no industry is not directly or indirectly related to water. Every factory needs to use the various functions of water to maintain normal production, and almost every production link needs the participation of water. The United Nations has listed my country as one of the 13 most water-scarce countries in the world. At present, my country's per capita water consumption is 30% of the world's per capita water consumption. Unfortunately, with the ever-increasing water consumption, the problem of water pollution has become more and more serious, so the purification treatment of industrial wastewater has become extremely important. The environmentally friendly water purification functional masterbatch can not only reduce the impact of sewage on the environment, but also improve the utilization rate of water resources. Moreover, the water purification functional masterbatch is made of environmentally friendly materials to meet environmentally friendly requirements.

Summary of the invention

In order to solve the above technical problems, the first object of the present invention is to provide an environmentally friendly water purification functional masterbatch; the second object of the present invention is a method for preparing the environmentally friendly water purification functional masterbatch.

In order to achieve the first objective of the above-mentioned invention, the present invention adopts the following first technical solution: an environmentally friendly water purification functional masterbatch, the masterbatch contains the following components by weight: 5-15 parts of polyester resin, poly 35-45 parts of olefin resin, 40-50 parts of mineral powder, and 5-10 parts of degradable resin polymer, and the particle surface of the masterbatch has a concave-convex thread-like structure.

In the above-mentioned first technical solution, preferably, the masterbatch is composed of the following components by weight: 5-10 parts by weight of the polyester resin, 40-45 parts by the polyolefin resin, 40-45 parts by the mineral powder, and degradable 8 parts of resin polymer. In a further preferred embodiment, the masterbatch is composed of the following components by weight: 6 parts by weight of polyester resin, 45 parts by polyolefin resin, 41 parts by mineral powder, and 8 parts by degradable resin polymer.

In the above first technical solution, preferably, the degradable resin polymer is selected from at least one of polylactic acid PLA, polybutylene adipate terephthalate PBAT and starch.

In the above first technical solution, preferably, the mineral powder is selected from at least one of talc powder, calcium carbonate, quartz powder, wollastonite and kaolin. Further preferably, the mineral powder mesh number is 500-5000 mesh.

In the above first technical solution, preferably, the polyester resin is selected from polycarbonate PC, polymethyl methacrylate PMMA, polyethylene terephthalate-1 and 4-cyclohexanedimethanol At least one of ester PETG.

In the above first technical solution, preferably, the polyolefin resin is selected from at least one of polypropylene PP, high-density polyethylene HDPE, low-density polyethylene LDPE and linear low-density polyethylene LLDPE.

In order to achieve the second object of the above-mentioned invention, the present invention adopts the following second technical solution: a method for preparing the above-mentioned environmentally friendly water purification functional masterbatch, the method including the method comprising:

Step 1: Stir the polyester resin, polyolefin resin, and degradable resin polymer uniformly, and then feed the mineral powder together with the mineral powder into the extruder through a weight loss scale to form a uniform mixture;

Step 2: Set the temperature of the extruder to 170-220°C so that the mixture is converted into a semi-molten state, and the mixture is extruded and pelletized through the extruder to obtain an environmentally friendly functional water purification functional mother grain.

In the above second preferred solution, in the above step 2, the extrusion process of the extruder is controlled so that the mixture in a semi-molten state will undergo melt fracture when it enters the die of the extruder, In order to achieve the formation of concave and convex thread-like structure on the surface of the extrudate.

The water purification function masterbatch of the present invention not only has excellent water purification function, but also because the water purification function masterbatch is made of environmentally friendly materials, it meets the needs of environmental friendliness; in addition, the present invention has lower production costs, among which The prices of polyolefin materials and mineral powder are very low, and the production equipment is relatively simple, which greatly reduces the production cost. In the preparation method of the water purification function masterbatch of the present invention, the extrusion process and the material formula are set simultaneously, so that the material melts at the die of the extruder, and the concave-convex thread shape is formed on the surface of the masterbatch. The structure makes it possible to form a microporous structure on the surface and inside of the masterbatch during use. The degradable polymer in the formulation of the masterbatch with this structure accelerates decomposition under the influence of the external environment during use, and forms micropores on the surface and inside of the resin of the water purification function masterbatch, which greatly increases the specific surface area and surface roughness of the masterbatch It is more conducive to filtering and adsorbing impurities in the water.

Detailed ways

In order to describe in detail the technical content, structural features, objectives and effects of the invention, a detailed description will be given below in conjunction with the embodiments.

The extruder in the following embodiments adopts a twin-screw extruder. The extruder includes a feeding zone, a first heating zone, a second heating zone, a third heating zone, a fourth heating zone, and a second heating zone along the material movement direction. Five heating zones, sixth heating zone, seventh heating zone, eighth heating zone, ninth heating zone and machine head. When the extruder selects and installs the internal thread block, the internal thread block is divided into conveying section, melting section, homogenizing section and compression section according to the function; in the specific setting, the conveying section group is composed of thread blocks with long pitch , There is a compression section composed of appropriate short pitch thread blocks between entering the melting section. The melting section is composed of a few thick shear slices and an appropriate amount of thin shear slice thread blocks. The homogenization section is composed of scattered thin shear piece thread blocks. The compression section is composed of a proper amount of short-pitch thread blocks. Reverse thread speed is not used in the arrangement. The overall arrangement is weakly sheared and weakly dispersed.

When making the masterbatch of the following embodiment, the control temperature of each part of the extruder is: the first heating zone 140±10°C, the second heating zone 170±10°C, the third heating zone 190±10°C, and the first heating zone is 170±10°C. Four heating zones 190±10℃, fifth heating zone 175±10℃, sixth heating zone 175±10℃, seventh heating zone 200±10℃, eighth heating zone 190±10℃, ninth heating zone 210± 10℃ and the head 210±10℃.

The arrangement and parameter configuration of each thread block are as follows:

[Table 1]

Test equipment and standards:

1. Bulk density: powder bulk density tester GB/T1479.1-2011.

2. The depth of thread on the surface of masterbatch particles: measured by vernier calipers.

Example 1:

In parts by weight, 6 parts of PMMA (CM-205), 45 parts of PP (T30S), 8 parts of PLA (4032D), mixed uniformly, and 41 parts of calcium carbonate (500 mesh) are added to the twin-screw extrusion by weight loss In the machine, the temperature of the extruder and the configuration of the screw block are set as described above. The vacuum degree of the extruder is controlled at -0.8MPa, the screw speed is 350RPM, and the output is 40kg/h.

According to the above-mentioned control parameters, the above-mentioned parts by weight of the raw materials are first transformed into a semi-molten state in the extruder, and the semi-molten mixture will undergo melt fracture when entering the die of the extruder head. The surface of the product is formed with a concave-convex thread-like structure similar to a thread.

Test results of the prepared environmentally friendly water purification functional masterbatch: the bulk density is 600g/L, and the depth of the raised threads on the particle surface is 1.5-2mm.

Example 2:

In parts by weight, 6 parts of PC (ET-3113), 40 parts of PP (K8003), 8 parts of PLA (4032D), mixed uniformly, and 46 parts of calcium carbonate (500 mesh) are added to the twin-screw extrusion by weight loss In the machine, the temperature of the extruder and the configuration of the screw block are set as described above. The vacuum degree is controlled at -0.5MPa, the screw speed is 400RPM, and the output is 40kg/h.

According to the above-mentioned control parameters, the above-mentioned parts by weight of the raw materials are first transformed into a semi-molten state in the extruder, and the semi-molten mixture will undergo melt fracture when entering the die of the extruder head. Concave and convex thread-like structures are formed on the surface of the product.

Test results of the prepared environmentally friendly water purification function masterbatch: the bulk density is 700g/L, and the depth of the raised threads on the particle surface is 1.8-2.3mm.

The environment-friendly water purification function masterbatch resin provided by the present invention can adjust the size, bulk density, and sedimentation rate of the water purification function masterbatch resin according to the water flow speed and impurity types, and filter most of the impurity particles in the sewage. The purification mechanism is that the surface of the resin particles of the water purification function masterbatch prepared by a special process has raised threads and a large number of micropores, and some acidic or alkaline substances in the sewage can accelerate the decomposition of degradable polymers, and further improve the water purification function. Holes are formed on the masterbatch, which greatly increases the specific surface area and surface roughness of the water purification masterbatch, which effectively plays a role of filtration and adsorption.

The above-mentioned embodiments are only to illustrate the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement them accordingly, and should not limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Summary of the invention

technical problem

The solution to the problem

The beneficial effects of the invention

Claims

An environmentally friendly water purification functional masterbatch, which is characterized in that the masterbatch contains the following components by weight: 5-15 parts by weight of polyester resin, 35-45 parts by polyolefin resin, 40-50 parts by mineral powder, and The degradable resin polymer is 5-10 parts, and the particle surface of the masterbatch has a concave-convex thread-like structure.
The environmentally friendly water purification functional masterbatch according to claim 1, wherein the masterbatch is composed of the following parts by weight: 5-10 parts of the polyester resin and 40-45 parts of the polyolefin resin , 40-45 parts of mineral powder and 8 parts of degradable resin polymer.
The environmentally-friendly water purification functional masterbatch according to claim 2, characterized in that: the masterbatch is composed of the following components by weight: 6 parts of polyester resin, 45 parts of polyolefin resin, 41 parts of mineral powder, and 8 parts of degradable resin polymer.
The environmentally friendly water purification functional masterbatch according to claim 1, wherein the degradable resin polymer is selected from the group consisting of polylactic acid PLA, polybutylene adipate terephthalate PBAT and starch At least one.
The environmentally friendly water purification functional masterbatch according to claim 1, wherein the mineral powder is selected from at least one of talc powder, calcium carbonate, quartz powder, wollastonite and kaolin.
The environmentally friendly water purification functional masterbatch according to claim 5, wherein the mineral powder has a mesh number of 500-5000 mesh.
The environmentally friendly water purification functional masterbatch according to claim 1, wherein the polyester resin is selected from polycarbonate PC, polymethyl methacrylate PMMA, polyethylene terephthalate -1 and at least one of 4-cyclohexanedimethanol ester PETG;
The environmentally friendly water purification functional masterbatch according to claim 1, wherein the polyolefin resin is selected from polypropylene PP, high-density polyethylene HDPE, low-density polyethylene LDPE and linear low-density polyethylene LLDPE At least one of them.
A method for preparing the environmentally friendly water purification functional masterbatch according to any one of claims 1-8, characterized in that the method comprises:

Step 1: Stir the polyester resin, polyolefin resin, and degradable resin polymer uniformly, and then feed the mineral powder together with the mineral powder into the extruder through a weight loss scale to form a uniform mixture;

Step 2: Set the temperature of the extruder to 170-220°C, so that the mixture is converted into a semi-molten state, and the mixture is extruded and pelletized to obtain an environmentally friendly functional water purification masterbatch.
The preparation method according to claim 9, characterized in that: in the second step, the extrusion process of the extruder is controlled so that the mixture in a semi-molten state enters the die of the extruder Melt fracture occurs to achieve the formation of concave and convex thread-like structures on the surface of the extrudate.