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Preparation method for monofilaments containing hemp meal

A technology of hemp flour and monofilament, which is applied in the directions of melt spinning, manufacturing tools, conjugated synthetic polymer man-made filaments, etc., can solve problems such as poor surface bonding performance, and achieve the effect of shortening the production process and reducing the cost.

Inactive Publication Date: 2015-04-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is that the hemp powder is used for spinning, and its surface bonding performance is poor

Method used

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  • Preparation method for monofilaments containing hemp meal
  • Preparation method for monofilaments containing hemp meal
  • Preparation method for monofilaments containing hemp meal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of adding hemp powder to PP filaments is as follows:

[0020] After the hemp skin and the hemp stalk are pulverized in an ultrafine pulverizer, the hemp powder with a particle diameter of 10 to 60 microns is ground through a ball mill, and the hemp skin and hemp stalk are mixed evenly with a mass ratio of 1:1 to obtain the hemp powder. The powder will be treated with a silane coupling agent with a mass fraction of 1%. The mass of the silane coupling agent solute accounts for 1% of the mass of the hemp powder, and then it is baked in an oven at 100°C for 8 hours. After the hemp powder is dried, take the processed Afterwards, 0.09 g of hemp powder and 2.91 g of PP were melt-spun, the temperature of the twin-screw extruder was 190° C., the temperature of the spinning die was 230° C., and the spinning speed was 350 m / min. After winding and forming by a winding machine, the stretching speed is 80 m / min, and then the spun filaments are stretched twice b...

Embodiment 2

[0026] The preparation method of adding hemp powder to PP filaments is as follows:

[0027] After the hemp skin and the hemp stalk are pulverized in an ultrafine pulverizer respectively, the hemp powder with a particle diameter of 10 to 60 microns is ground through a ball mill, and the hemp skin and hemp stalk are mixed evenly with a mass ratio of 1:2 to obtain the hemp powder. The powder will be treated with a silane coupling agent with a mass fraction of 1%. The mass of the silane coupling agent solute accounts for 1% of the mass of the hemp powder, and then it is baked in an oven at 100°C for 8 hours. After the hemp powder is dried, take the processed Afterwards, 0.09 g of hemp powder and 2.91 g of PP were melt-spun, the temperature of the twin-screw extruder was 190° C., the temperature of the spinning die was 230° C., and the spinning speed was 350 m / min. After winding and forming by a winding machine, the stretching speed is 80 m / min, and then the spun filaments are stre...

Embodiment 3

[0033] The preparation method of adding hemp powder to PP filaments is as follows:

[0034] After the hemp skin and the hemp stalk are pulverized in an ultrafine pulverizer respectively, the hemp powder with a particle diameter of 10 to 60 microns is ground through a ball mill, and the hemp skin and hemp stalk are mixed evenly with a mass ratio of 2:3 to obtain the hemp powder. The powder will be treated with a silane coupling agent with a mass fraction of 1%. The mass of the silane coupling agent solute accounts for 3% of the mass of the hemp powder, and then baked in an oven at 100°C for 8 hours. After the hemp powder is dried, take the processed Afterwards, 0.18 g of hemp powder and 2.82 g of PP were melt-spun, the temperature of the twin-screw extruder was 220° C., the temperature of the spinning die was 240° C., and the spinning speed was 750 m / min. After winding and forming by a winding machine, the stretching speed is 180 m / min, and then the spun silk is stretched twice...

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Abstract

The invention discloses a preparation method for monofilaments containing hemp meal. The preparation method comprises the following steps: crushing the mixture of hemp skins and hemp stems in an ultrafine grinder for many times to obtain grains with grain diameter of 10-60 microns; mixing the hemp skins and the hemp stems at a ratio of 1: (1 to 2) to obtain the hemp meal, treating the hemp meal in silane coupling agent aqueous solution, then roasting the hemp meal in an oven, and thus obtaining the treated hemp meal after the hemp meal is dried; uniformly mixing the treated hemp meal with polypropylene, polyethylene or polylactic acid and then adding in a double-screw extruder and carrying out melt spinning, carrying out winding forming by a winding machine, and then secondarily stretching the spun filaments by an air heating method to obtain the monofilaments containing the hemp meal. According to the preparation method disclosed by the invention, the hemp skins and the hemp stems are adequately utilized, and the utilization space of hemp is expanded by means of producing packaging materials, agricultural mesh film strengthening nets, carpet base cloth nets, geotechnical cloth base cloth nets, ropes and the like.

Description

technical field [0001] The invention belongs to the field of multipurpose development of hemp, and in particular relates to a method for preparing monofilament containing hemp powder. Background technique [0002] my country is one of the countries with rich hemp resources in the world. Hemp crops are annual renewable crops with the characteristics of low density, high strength and low price. With the concept of "green environmental protection" deeply rooted in the hearts of the people, new natural fibers The development and utilization of resources follow the trend and develop rapidly. The blended spinning of hemp powder and polypropylene is very beneficial to make full use of renewable natural plants and reduce the cost of materials, which is consistent with the current development direction of low-cost and high-performance materials. Now the predecessors have used calcium carbonate powder and PP blend melt spinning, finally made calcium carbonate filled PP packaging mater...

Claims

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Application Information

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IPC IPC(8): D01F8/06D01F8/02D01D5/098B27K9/00
Inventor 孙志远倪建华杨建平裴泽光张斌郁崇文
Owner DONGHUA UNIV
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