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Manufacture and application of a polyamide antiblock master batch

A technology of open-ended masterbatch and polyamide, which is applied in the mixing field of preparing open-ended polyamide masterbatch, and can solve the problems of unspecified addition method and method, corrosion of metering screw and extruder screw, backflow of feeding section, etc.

Inactive Publication Date: 2009-07-15
EMS PATENT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Problems that may occur during this period include: backflow in the feeding section, corrosion of the metering screw and extruder screw, and unqualified quality of the masterbatch
Although according to the patent, the anti-blocking agent should be added to the melt of the carrier polymer and mixed uniformly, but the patent does not elaborate on the way and method of this addition

Method used

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  • Manufacture and application of a polyamide antiblock master batch
  • Manufacture and application of a polyamide antiblock master batch
  • Manufacture and application of a polyamide antiblock master batch

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Embodiment Construction

[0008] The method described in the present invention uses synthetic amorphous fine particle silica without surface treatment as blocker and filler, hereinafter referred to as synthetic silica.

[0009] The carrier polyamide is preferably selected from PA6, PA66, PA11, PA12, PA1212, PA6 / 12, PA6 / 66, PA6 / 69, PA6I / 6T and mixtures thereof, especially PA6, PA12, PA6 / 12 and PA6I / 6T and mixtures thereof.

[0010] Depending on the carrier polyamide used, the minimum temperature of the extruder is at least 180°C, suitably 220°C, particularly suitably 250°C, most suitably 250-300°C. Cool the maximum temperature of the extruder barrel in the front feeding section to 60°C, preferably to 40°C, especially to 25°C.

[0011] In the kneading method for preparing polyamide open-ended masterbatch according to the present invention, it is suitable to use synthetic amorphous fine particle silica without surface treatment. The average particle diameter of such synthetic silica is 1-8 μm, suitably ...

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Abstract

The invention relates to a compounding method of a polyamide antiblock master batch, which comprises incorporating 4-23 wt.% non-surface-treated, synthetic, amorphous silica into a carrier polyamide in a single extrusion pass, which is characterized by using a double-screw extruder with a processing length of at least 40 times its screw diameter. The silica is fed to different zones of the extruder through at least two dosing sites, so that part of non-surface-treated, synthetic, amorphous silica is metered and added in the carrier polyamide, and one of the two dosing sites is a first side feeder.

Description

technical field [0001] The invention relates to a mixing method for preparing polyamide opening masterbatch. In one extrusion process, a synthetic amorphous fine particle silica without surface treatment with a weight percentage of 4-23% is added to carrier polyamide among. The masterbatch can be used to produce films, is suitable for producing oriented stretch films, and is especially suitable for producing biaxially stretched films. The films include both cast and blown films. Background technique [0002] It is known to incorporate silica containing low bulk density blocking agents into the carrier polymer using an extruder. Problems that may arise during this period include: backflow in the feeding section, corrosion of the metering screw and extruder screw, and unqualified quality of the masterbatch. It has hitherto not been possible to incorporate synthetic amorphous fine-grained silica without surface treatment into the carrier polyamide in a single process using a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/20C08J3/22C08L77/00C08K3/36C08J5/18B29C47/60B29C47/92B29L7/00B29C48/405B29C48/41B29C48/92
CPCB29K2105/256C08L77/00C08L77/02B29C47/40C08L77/06B29K2105/0005B29B7/90B29C47/0004B29C47/1045B29K2105/06C08J3/226C08J2377/02B29C47/1063B29C47/1081B29C47/0057B29C47/0021B29C47/1018C08J2477/00B29B7/46B29K2077/00B29C48/92B29C2948/92704B29C48/297B29C48/29B29C48/022B29C48/04B29C48/08B29C48/0018B29C48/287B29C48/2886B29C2948/9259B29C2948/926B29C2948/92723B29C2948/92885B29C2948/92895B29C48/41B29C48/405
Inventor M·普莱格哈S·汉G·A·托奥N·梅里罗
Owner EMS PATENT AG
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