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Heteromorphism polypropylene monofilament and production method thereof

A production method and polypropylene technology, applied in the direction of single-component polyolefin rayon, rayon manufacturing, fiber chemical characteristics, etc., can solve the problem of low melt strength, inability to form stable foam structure, low gas retention, etc. low price, excellent microwave adaptability and good thermal stability

Inactive Publication Date: 2015-08-26
马海燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the application of special-shaped polypropylene foamed monofilament, the existing polypropylene has the disadvantages of low melt strength, low gas retention and inability to form a stable foam structure during the melting process.

Method used

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  • Heteromorphism polypropylene monofilament and production method thereof
  • Heteromorphism polypropylene monofilament and production method thereof

Examples

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Embodiment 1

[0021] The invention provides a special-shaped polypropylene monofilament, which comprises the following raw materials in parts by weight: 93-99 parts of polypropylene, 1-7 parts of additives; the additive includes foaming agent masterbatch; the breaking strength of the monofilament is 0.8-99 parts. 4.5CN / dtex, the elongation at break is 47-82%, and the density of the monofilament is 0.50-0.80g / cm 3 .

[0022] Further, the foaming agent masterbatch includes the following raw materials in parts by weight: 100 parts of polypropylene, and 10-20 parts of foaming agent.

[0023] Further, the active ingredients of the foaming agent are one or more of the following: azodicarbonamide, azobisisobutyronitrile, p-toluenesulfonylsemicarbazide.

[0024] Further, as figure 1 The schematic diagram of the structure of the special-shaped polypropylene monofilament is shown, the section of the monofilament is dumbbell-shaped, the thickness of the monofilament is 0.15-0.40 mm, the width of the...

Embodiment 2

[0027] Different from the weight parts of the raw materials of the special-shaped polypropylene monofilament provided in Example 1, the special-shaped polypropylene monofilament provided in this example includes the following raw materials by weight: 95-98 parts of polypropylene, 2-5 parts of additives , the cross-section of the prepared special-shaped polypropylene monofilament is dumbbell-shaped, the thickness of the monofilament is 0.25-0.35mm, the width of the monofilament is 1.0-1.5mm, and the breaking strength of the monofilament is 1-3.5CN / dtex. The elongation at break is 50-80%. The additive in this embodiment is also preferably a blowing agent masterbatch.

[0028] The special-shaped polypropylene monofilament with a stable foam structure provided by Example 2 of the present invention further controls the ratio of raw material polypropylene and additives, controls the amount of air bubbles contained in the foamed filament, and thereby controls the drawing effect.

Embodiment 3

[0030] Such as figure 1 Shown, the present invention also provides a kind of production method of special-shaped polypropylene monofilament, comprises the following steps:

[0031] S101: mixing the polypropylene and the foaming agent masterbatch, melting the mixed raw materials, and spinning through an extruder;

[0032] S102: Liquid cooling the spun monofilament;

[0033] S103: Stretching the cooled monofilament with hot air;

[0034] S104: Finally, heat-setting the stretched monofilament.

[0035] The above production method mixes the raw materials, melts and spins the mixed raw materials, and cools, stretches and heat-sets the monofilaments coming out of the extruder. In each step, the monofilaments are drawn by specific temperatures and methods. Stretching and other treatments to determine the specification, strength and elongation at break of the profiled polypropylene monofilament.

[0036] Optionally, the spinning temperature in step S101 is: 275-290°C; spinning at ...

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Abstract

The invention discloses a heteromorphism polypropylene monofilament and a production method thereof. The monofilament is prepared from the following raw materials: 93-99 parts of polypropylene and 1-7 parts of additive, wherein the additive contains foaming master batch; the breaking strength of the monofilament is 0.8-4.5CN / dtex, the elongation at break is 47-82% and the density of the monofilament is 0.50-0.80g / cm<3>. The invention also discloses the production method of the heteromorphism polypropylene monofilament, which comprises the steps of mixing polypropylene with the foaming master batch, fusing the mixed raw materials, and carrying out spinning through an extruder; carrying out liquid cooling on the spined monofilament; stretching the cooled monofilament by utilizing hot wind; carrying out thermoforming on the stretched monofilament. According to the ratio disclosed by the invention, less raw materials are used and are simple and easily available, and the prepared heteromorphism polypropylene monofilament has the advantages of light mass, properties of thermal insulation, buffering and corrosion prevention, high specific strength, low price and the like.

Description

technical field [0001] The invention relates to a monofilament, in particular to a special-shaped polypropylene monofilament and a production method thereof. Background technique [0002] In recent years, the use of foamed plastic products has become more and more widespread. Foamed plastics include polyurethane, polystyrene and polyolefin, and foamed polypropylene has attracted research from various countries because of its excellent properties such as good stability and stress cracking resistance. of great interest to readers, producers and consumers. [0003] The existing polypropylene monofilament has low thermal stability, stress crack resistance and high temperature stability, while polypropylene foamed monofilament has the advantages of light weight, heat insulation, cushioning, anti-corrosion, high specific strength, and low price. And polypropylene foamed monofilament has a wide range of applications in the daily necessities industry, packaging industry, transporta...

Claims

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Application Information

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IPC IPC(8): D01F6/46D01F1/10
Inventor 马海燕
Owner 马海燕
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