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Anti-static polyolefin ventilated membrane composition and method for preparing the same

A technology of polyolefin and breathable film, applied in the direction of coating, etc., can solve the problem of not being able to effectively balance the antistatic and mechanical properties of polyolefin breathable film, air permeability, product appearance and processability, poor mechanical properties of the film, and the addition of conductive fillers Large volume and other issues

Inactive Publication Date: 2008-08-27
合诚技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The characteristic of this method is that the antistatic effect of the film is good, but the film can only be made into black or dark color, and at the same time, the amount of conductive filler added is large, and the high content of inorganic filler makes the mechanical properties of the film very poor.
None of the above methods can effectively balance the contradiction between antistatic performance, mechanical performance, air permeability, product appearance and processability of polyolefin breathable film.

Method used

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  • Anti-static polyolefin ventilated membrane composition and method for preparing the same
  • Anti-static polyolefin ventilated membrane composition and method for preparing the same

Examples

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preparation example Construction

[0036] Preparation of antistatic resin:

[0037] 1. Preparation of antistatic resin 1

[0038] (1) 2,4-toluene diisocyanate (TDI) reacts with stearyl alcohol at a temperature of 60-70°C for 2-3 hours to obtain a pre-reactant, in which the isocyanate group (-NCO) in 2,4-toluene diisocyanate The ratio of the number of moles to the number of moles of hydroxyl groups in stearyl alcohol is 2. Then react the pre-reactant with the amino-terminated polyethylene glycol with a molecular weight of 2500 in a molar ratio of 1 at 150-160° C. for 5-10 minutes to prepare the antistatic agent AS.

[0039] (2) The antistatic agent (AS), glycidyl methacrylate and the third monomer styrene are melt-grafted to ethylene-propylene copolymer (EPR) by twin-screw under the action of dicumyl peroxide initiator The antistatic resin 1 is prepared on the macromolecular chain. Wherein the addition amount of antistatic agent AS is 30% of polyolefin weight, the addition amount of glycidyl methacrylate is 3...

Embodiment 1

[0053] Example 1 Preparation of antistatic polyolefin gas permeable film

[0054] (1) Carry out surface coating treatment to calcium carbonate (particle diameter is 5.0 μ m) with surface modifier stearic acid in high-speed mixer and obtain coating calcium carbonate, the consumption of surface modifier is 2.0 of the total amount of calcium carbonate % (percentage by weight). The treatment process conditions are as follows: the rotation speed is 3000r / min, the treatment temperature is 100°C, and the treatment time is 45min.

[0055] (2) According to the weight ratio shown in Table 1, 50 parts by weight of linear low density polyethylene copolymerized with ethylene and hexene (C6) has a melt index of 1.0 g / 10 min and a density of 0.915 g / cm 3 , the molecular weight distribution is 3; 20 parts by weight of high-pressure polyethylene, the melt index is 2.0g / 10min, and the density is 0.920g / cm 3 30 parts by weight of antistatic resin 1; 100 parts by weight of calcium carbonate and...

Embodiment 2

[0058] (1) calcium carbonate (particle diameter is 0.5 μ m) is carried out surface coating treatment with surface modifier isopropyl tris (dioctyl phosphate acyloxy) titanate in high-speed mixer to obtain coated calcium carbonate, The amount of the surface modifier is 1.5% (percentage by weight) of the total amount of calcium carbonate. The treatment process conditions are as follows: the rotation speed is 3000r / min, the treatment temperature is 90°C, and the treatment time is 30min.

[0059] (2) According to the weight ratio shown in Table 1, 60 parts by weight of linear low-density polyethylene copolymerized with ethylene and butene (C4) has a melt index of 4.0 g / 10 min and a density of 0.940 g / cm 3 , the molecular weight distribution is 15; 10 parts by weight of high-pressure polyethylene, the melt index is 20.0g / 10min, and the density is 0.900g / cm 3 50 parts by weight of antistatic resin 2; 100 parts by weight of calcium carbonate coated with 0.8 parts by weight of antiox...

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Abstract

The invention discloses an antistatic polyolefin permeable film compound and a process for preparing the antistatic polyolefin permeable film. The compound comprises 30-60 parts by weight of linear low density polyethylene, 10-40 parts by weight of high-pressure polyethylene, 30-60 parts by weight of antistatic resin, 100-180 parts by weight of calcium carbonate and 0.4-1.0 parts by weight of anti-oxidant. The invention overcomes the weakness of traditional antistatic agent and antistatic filling, not only ensures the antistatic property of permeable film through adding antistatic resin, but also not affects the processing property, permeable property and the appearance of film. The processing flow-ability, the dispersing evenness of organic filling and processing stability of antistatic polyolefin permeable film compound in the invention can meet the production requirements of extrusion filmmaking. The water vapor permeable rate of the antistatic polyolefin permeable film which is prepared by the invention is not lower 2000g / m2 24h, and the surface electrical resistivity is no higher 10 9 omega / m2.

Description

technical field [0001] The invention belongs to the technical field of plastic modification, in particular to an antistatic polyolefin gas permeable membrane composition and a method for preparing the antistatic polyolefin gas permeable membrane. Background technique [0002] The method for making polymer films waterproof and breathable includes: mixing polyolefin resins (such as polypropylene or polyethylene, various olefin copolymers and / or polyolefin blends) with a certain amount (such as 30 to 70 wt%) of Inorganic particulate fillers, such as calcium carbonate, are blended and a film is extruded from the blend; the film is then heated and stretched so that voids are formed in the area surrounding the filler particles, which allow vapor but not liquid to pass through , to prepare a polyolefin waterproof and breathable film. [0003] The film can be used on outdoor fabrics, tarps, intimate products, infection control products, electronic packaging products, protective app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L51/06C08L75/02C08K3/26C08K5/13C08K5/524C08J5/18C08K9/04B29C69/02B29C55/04B29B9/00B29C47/92B29C47/60B29C41/24B29C55/28B29C48/10B29C48/92
CPCB29C48/92B29C2948/92704B29C48/10B29C2948/92895B29C2948/92923
Inventor 谢怀兴周开德容土光韩兴云诸泉李刚蒋文真
Owner 合诚技术股份有限公司
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