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Polyolefin breathable masterbatch, and preparation method thereof

A technology of air-permeable masterbatch and polyalkylene hydroxyl, which is applied in the field of new materials, can solve the problems of film solution improvement, affecting the scope of use, and increasing the process, so as to simplify the production process, meet the requirements of production and processing and use requirements, and ensure quality and yield effect

Inactive Publication Date: 2013-06-19
SHENZHEN JIANCAI TECH DEVING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to reduce the water content in the breathable masterbatch, some manufacturers will choose to mix the water-absorbing desiccant into the breathable masterbatch formula, but adding the water-absorbing desiccant containing calcium oxide will lead to a significant increase in the pH value of the film solution, affecting the Scope of use; Some will use dryers to re-dry, but using a dryer to re-dry will increase energy consumption, increase processes, and affect efficiency

Method used

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  • Polyolefin breathable masterbatch, and preparation method thereof
  • Polyolefin breathable masterbatch, and preparation method thereof
  • Polyolefin breathable masterbatch, and preparation method thereof

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preparation example Construction

[0109] like figure 1 As shown, the embodiment of the present invention also provides a preparation method of polyolefin breathable masterbatch, including:

[0110] S100, put the pretreated mixed raw material into a co-rotating twin-screw granulator, extrude and granulate to obtain polyolefin breathable masterbatch, wherein the granulator adopts underwater granulation, and the underwater granulator The water temperature of the grains is controlled at 75~95°C.

[0111] The aspect ratio of the granulator is 35 ~ 50;

[0112] Wherein, the temperature distribution of the screw barrel of the granulator is as follows: Zone 1 170~180°C, Zone 2 180~190°C Zone 3 190~195°C, Zone 4 180~190°C, Zone 5 175~185°C, Zone 6 180~190℃, zone 7 190~200℃, die head 200~220℃.

[0113] Wherein, the vacuum degree of the sixth zone of the barrel of the granulator is set to -0.2 MPa ~ -0.01MPa.

[0114]Preferably, the vacuum degree of the sixth zone of the barrel of the granulator is set to -0.1 MPa to...

Embodiment 1

[0168] Add 45% polyolefin resin (low-density polyethylene: linear low-density polyethylene = 1:5), 1% zinc stearate and 1% hindered phenolic antioxidant (grade 1010) into the high-speed mixer and mix for 10 Minutes, the speed is 1000 rpm; then add 45% ultrafine inorganic filler calcium carbonate (particle size is 0.5 microns to 10 microns) into the high-speed mixer and stir and mix for 15 minutes, the speed is 1000 rpm Then put it into the twin-screw granulator, the temperature of the barrel: 180°C in the first zone, 185°C in the second zone, 190°C in the third zone, 180°C in the fourth zone, 175°C in the fifth zone, 185°C in the sixth zone C, Zone 7 190°C, die head 210°C, vacuum at the exhaust port is -0.07 MPa, circulating water temperature is set to 85°C, underwater granulation; air-permeable particles pass through a propeller-type material-water separator to separate water and The air-permeable masterbatch is separated, and after being screened by a vibrating screen, it en...

Embodiment 2

[0170]Add 50% polyolefin resin (low-density polyethylene: linear low-density polyethylene = 1:3), 0.5% zinc stearate and 0.5% hindered phenolic antioxidant (grade 1010) into the high-speed mixer and mix for 10 Minutes, the speed is 1000 rpm; then add 52% ultrafine inorganic filler calcium carbonate (particle size is 0.5 micron to 10 microns) into the high-speed mixer and stir and mix for 15 minutes, the speed is 1000 rpm Then put it into the twin-screw granulator, the temperature of the barrel: 180°C in the first zone, 185°C in the second zone, 190°C in the third zone, 180°C in the fourth zone, 175°C in the fifth zone, 185°C in the sixth zone C, Zone 7 is 190°C, die head is 210°C, the vacuum degree of the exhaust port is -0.0,6 MPa, the circulating water temperature is set to 90°C, and the pellets are cut underwater; the air-permeable particles pass through the propeller-type water separator The water is separated from the air-permeable masterbatch, and after being screened by...

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Abstract

The invention discloses a polyolefin breathable masterbatch which comprises the following raw materials by weight ratio: 40-70 % of polyolefin resin, and 40-70 % of inorganic filling materials; and a moisture content of the polyolefin breathable masterbatch prepared from the polyolefin resin and the inorganic filling materials is less than or equal to 300 ppm. Correspondingly, the invention discloses a preparation method of the polyolefin breathable masterbatch. The polyolefin breathable masterbatch need not to be dried, and moisture of the breathable masterbatch can be removed through adjusting a temperature of cooling water, controlling a surface temperature of particles after being passed through a vibrating screen and using a delivery way with multichannel airducts. According to the invention, the polyolefin breathable masterbatch is good in physical and chemical properties, and greatly reduced in moisture content; production operation is simplified, energy consumption is minimized, subsequent requirements on film making is satisfied, quality and output of products are guaranteed, and influence of excess moisture on appearances, physical properties and pH value of the subsequently prepared films, as well as generation of broken holes and other adverse circumstances can be prevented.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a polyolefin breathable masterbatch and a preparation method thereof. Background technique [0002] Polyolefin breathable membrane was first successfully developed by Japan, and then introduced to South Korea and Taiwan. This technology has been greatly developed in South Korea, and its equipment and process technology have also been greatly improved. This technology began to be introduced into China in the 1990s. Due to the huge demand in the Chinese market, many domestic enterprises are very optimistic about the prospect of this product and have invested in this field one after another. [0003] The breathable film is called a "breathable film" because it is only breathable and impervious to water. The air-permeable film can be granulated by mixing polyolefin resin with a certain proportion of inorganic fillers. After being formed by a casting machine or a film blow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L23/12C08K3/26C08K3/30C08K3/34C08K3/36C08K3/22C08J3/22
Inventor 丘建强
Owner SHENZHEN JIANCAI TECH DEVING
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