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High-strength and high-modulus polyethylene film and continuous solid-state extrusion overstretching production method thereof

A polyethylene film, high-strength and high-modulus technology, used in textile cables, textiles and papermaking, etc., can solve the problems of poor wear resistance and low tensile strength, and achieve low density, strong corrosion resistance, wear resistance and Excellent effect of bending fatigue resistance

Inactive Publication Date: 2010-11-24
SHANDONG ICD HIGH PERFORMANCE FIBRES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, the current polyethylene film has low tensile strength and poor wear resistance, so it is not suitable for use in ropes, nets, bulletproof and stab-proof equipment, pipe or cable reinforcement coating, building reinforcement materials, composite materials, etc. field use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-strength high-modulus polyethylene film is characterized in that: it is made of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 1 million; its tensile strength is at 6.6cN / dtex, its tensile modulus is at 220cN / dtex, and its elongation at break The melting rate is 3%; the melting temperature range is between 145 and 155°C; the thickness is 0.01mm; and the width is 5mm.

[0028] The production method of the above-mentioned continuous solid-state extrusion super-stretching of high-strength and high-modulus polyethylene film is characterized in that it includes the following steps of continuous production:

[0029] (1) Preparation of nascent film with unwound molecular chains:

[0030] The ultra-high molecular weight polyethylene powder raw material is continuously injected into the plunger extruder, the extrusion temperature is controlled at 120°C, the extrusion pressure is at 50Mpa, and it is continuously extruded through the d...

Embodiment 2

[0034] A high-strength high-modulus polyethylene film is characterized in that: it is made of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 6 million; its tensile strength is at 10cN / dtex, its tensile modulus is at 833cN / dtex, and its elongation at break is It is 1.2%; its melting temperature range is between 145 and 155°C; its thickness is 1mm; its width is 4mm.

[0035] The production method of the above-mentioned continuous solid-state extrusion super-stretching of high-strength and high-modulus polyethylene film is characterized in that it includes the following steps of continuous production:

[0036] (1) Preparation of nascent film with unwound molecular chains:

[0037] The ultra-high molecular weight polyethylene powder raw material is continuously injected into the plunger extruder, the extrusion temperature is controlled at 140°C, the extrusion pressure is at 500Mpa, and it is continuously extruded through the die set at the ou...

Embodiment 3

[0041] A high-strength high-modulus polyethylene film is characterized in that: it is made of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 2 million; its tensile strength is at 14cN / dtex, its tensile modulus is at 736cN / dtex, and its elongation at break is It is 1.9%; its melting temperature range is between 145 and 155°C; its thickness is 0.38mm; its width is 0.5mm.

[0042] The production method of the above-mentioned continuous solid-state extrusion super-stretching of high-strength and high-modulus polyethylene film is characterized in that it includes the following steps of continuous production:

[0043] (1) Preparation of nascent film with unwound molecular chains:

[0044] The ultra-high molecular weight polyethylene powder raw material is continuously injected into the plunger extruder, the extrusion temperature is controlled at 122°C, the extrusion pressure is at 320Mpa, and it is continuously extruded through the die set at t...

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Abstract

The invention discloses a high-strength and high- modulus polyethylene film and a continuous solid-state extrusion overstretching production method thereof. The invention is characterized in that the high-strength and high- modulus polyethylene is made from ultra-high molecular weight polyethylene with the viscosity-average molecular weight of 1,000,000-6,000,000, the tensile strength thereof is 6.6-30cN / dtex, the tensile modulus is 220-1350cN / dtex, and the elongation at break is 1.2-3%. The high-strength and high- modulus polyethylene film has the advantages of high strength, high corrosion resistance, low density and good abrasive resistance and flexural fatigue resistance. The continuous solid-state extrusion overstretching production method has the advantages of simple production technology, easy control and continuous production. The polyethylene film cut before and after overstretching can also be produced into high-strength and high-model polyethylene film split fibre or flat filament which is widely used in ropes, netting gears, bullet-proof and stab-proof articles, strengthened cladding materials for pipelines or cables, strengthened materials for buildings, composite materials and other fields.

Description

technical field [0001] The invention relates to a polyethylene film and a production method thereof, belonging to the technical field of new materials, in particular to a high-strength and high-modulus polyethylene film and a production method thereof for continuous solid-state extrusion and ultra-stretching. Background technique [0002] At present, high-strength and high-modulus polyethylene films with high tensile properties, film split fibers, etc., all use ultra-high molecular weight polyethylene of more than 1 million as raw materials in order to obtain due high tensile properties. However, since the ultra-high molecular weight polyethylene is melted, its molecular chains are easy to form an intertwined network structure, so that it cannot be melted to process products like ordinary polymers, but is generally processed by solvent dissolution. For example, U.S. Patent No. 5,503,791 discloses a production method of dissolving ultra-high molecular weight polyethylene in a...

Claims

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Application Information

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IPC IPC(8): C08L23/04B29C55/04B29C47/12B29C47/92B29C48/30B29C48/92
CPCD07B1/025B29C48/92B29C2948/92704B29C2948/92895B29C2948/92923D07B2201/2003D07B2201/2009D07B2205/2014D07B2801/10
Inventor 任意
Owner SHANDONG ICD HIGH PERFORMANCE FIBRES CO LTD
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