Permanently anti-static polyolefin master batch and preparation method thereof

Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a permanently anti-static polyolefin master batch and a preparation method thereof. The polyolefin master batch is prepared from the following components in parts by weight: 40-80 parts of polyolefin, 10-50 parts of conductive polymer or a composite material thereof, 5-30 parts of reinforcing conductive powder or fiber, 1-10 parts of a compatilizer, 1-10 parts of a dispersing agent, and 0.5-1.5 parts of other additives; the preparation method comprises the following steps: mixing the materials uniformly, then adding the mixture into a co-rotating twin screw extruder with a length to diameter ratio of 36-48, and extruding and pelletizing to obtain the product. The polyolefin master batch is good in dispersibility and compatibility; the good appearance, mechanical properties and stability of polyolefin can be maintained while the excellent anti-static effect can be achieved; the polyolefin master batch can be widely applied to membrane blowing, extrusion, blow molding and injecting molding products, and promotes the high-speed development of the electronic industry, the petroleum industry, the weapon industry and the military field in China.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a permanent antistatic polyolefin masterbatch and a preparation method thereof. Background technique [0002] Due to the development of the electronics industry, petroleum industry, weapon industry, and military fields towards integration and refinement, various static electricity hazards are increasing (such as high integration of electronic products, increasingly fine and precise circuits, strong static electricity High voltage can easily destroy these products), in order to reduce the loss caused by static electricity, all fields are looking for anti-static products with superior cost performance, and the products on the market either have poor anti-static effects and anti-static products that can achieve good results Either the cost is expensive or the color of the product is limited, which cannot meet the needs of the existing market. [0003] There ar...

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Problems solved by technology

[0002] Due to the development of the electronics industry, petroleum industry, weapon industry, and military fields towards integration and refinement, various static electricity hazards are increasing (such as high integration of electronic products, increasingly fine and precise circuits, strong static electricity High voltage can easily destroy these products), in order to reduce the loss caused by static electricity, all fields are looking for anti-static products with superior cost performance, and the products on the market either have poor anti-static effects and anti-static products that can achieve good results Either the cost is expensive or the color of the product is limited, which cannot meet the needs of the existing market

[0003] There are three main categories of existing antistatic products added to polyolefins: 1. Surfactants are added to polyolefins (mixed granulation or added in the form of masterbatch), due to the rapid migration and water absorption of surfactant products The friction coefficient on the surface of polyolefin products is reduced and a new antistatic film is formed. The volume resistivity of the product can only reach 10^9Ω.m and is very unstable with the change of the environment; 2. It is added to polyolefin Conductive materials, such as conductive carbon black and various metal powders (mixed and granulated or added in the form of masterbatch), the volume resistivity of this product can reach 10^6Ω.m, but the color is limited and the application occasions are limited; 3. The polymer permanent antistatic agent forms a conductive percolation network inside the plastic. The volume resistivity of this product can reach 10^6Ω.m, but the addition amount of this type of product is relatively large (generally 10 %-20%), too expensive to promote

[0004] At present, the antistatic methods commonly used in the market are mainly as follows, which have defects in application and promotion: 1. Surfactants are added to polyolefins. Due to the rapid migration and water absorption of surfactant products, the amount of addition It should not be too high and the volume resistivity of the product should preferably only reach 10^9Ω.m and it is very unstable with the change of the environment; 2. Conductive materials are added to polyolefin, but the color is limited; the use occasions are limited; 3. The added amount of polymer permanent antistatic agent products is relatively large (generally 10%-20%), the price is expensive, and it cannot be popularized and used

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