Polyethylene foam material and preparation method thereof

A technology of polyethylene foaming and foaming agent, which is applied in the field of polyethylene foaming materials and its preparation, and can solve problems such as the shortage of starting raw material naphtha

Inactive Publication Date: 2021-08-20
SHIJIAZHUANG QIHONG RUBBER PLASTIC PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defect that the existing low-density polyethylene foaming material has a shortage of starting raw material naphtha, the present invention provides a method that can significantly reduce the amount of polyethylene in the polyethylene foaming material and achieve the same level as the original polyethylene Energy-saving and environment-friendly polyethylene foam material with similar performance to foam material and preparation method thereof

Method used

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  • Polyethylene foam material and preparation method thereof

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Effect test

Embodiment 1

[0036] The present embodiment provides a kind of polyethylene foam material, and its preparation method is as follows:

[0037] Heat 60kg of sodium lignosulfonate in 180kg of acetic acid aqueous solution with a pH of 5 at 55°C-60°C for 1.5h, then add 30kg of chitosan and stir for 5h, then cool to room temperature to obtain the modified sodium lignosulfonate After the chitosan;

[0038] First get 110kg of chitosan and 3kg foaming agent (1.42kg AC foaming agent and 1.58kg foaming agent H) after the above-mentioned sodium lignosulfonate modification, 0.5kg stearic acid at an air pressure of 0.4MPa-0.6MPa Mix in a closed rubber mixer for 15 minutes to obtain a premix; then add 8 kg of LDPE and 0.4 kg of cross-linking agent dicumyl peroxide in sequence, continue to mix for 5 minutes until uniform, and discharge to obtain a mixed body;

[0039] Thinly knead the kneaded body on an open internal mixer at 90°C-100°C to a thickness of 6mm, then cut the obtained cut body, and pre-press ...

Embodiment 2

[0041] The present embodiment provides a kind of polyethylene foam material, and its preparation method is as follows:

[0042] Heat 90kg of sodium lignosulfonate in 180kg of acetic acid aqueous solution with a pH of 6 at 50°C-55°C for 2 hours, add 30kg of chitosan and stir for 4 hours, and cool to room temperature to obtain sodium lignosulfonate modified Chitosan;

[0043] First get 105kg of chitosan modified by sodium lignosulfonate and 4kg foaming agent (1.82kg AC foaming agent and 2.18kg foaming agent H), 0.5kg stearic acid at an air pressure of 0.4MPa-0.6MPa Mix in a closed rubber mixer for 20 minutes to obtain a premix; then add 10 kg of LDPE and 0.6 kg of cross-linking agent benzoyl peroxide in sequence, continue mixing for 3 minutes until uniform, and discharge to obtain a mixed body;

[0044]Thinly knead the kneaded body on an open internal mixer at 90°C-100°C to a thickness of 5mm, then cut the obtained cut body, and pre-press the cut body into a cuboid block simila...

Embodiment 3

[0046] The present embodiment provides a kind of polyethylene foam material, and its preparation method is as follows:

[0047] Heat 75kg of sodium lignosulfonate in 75kg of acetic acid aqueous solution with a pH of 5 at 55°C-60°C for 2 hours, cool to room temperature, then add 30kg of chitosan and stir for 4.5 hours to obtain the modified sodium lignosulfonate After the chitosan;

[0048] First get 100kg of above-mentioned chitosan modified by sodium lignosulfonate and 2kg of foaming agent (1kg of AC foaming agent and 1kg of foaming agent H1kg), 1kg of stearic acid in an airtight refining chamber with an air pressure of 0.4MPa-0.6MPa. Mix in a glue machine for 10 minutes to obtain a premix; then add 5kg LDPE, 1kg crosslinking agent (0.5kg dicumyl peroxide and 0.5kg 2,5-dimethyl-2,5-bis-hexane) successively, Continue to knead for 4 minutes until it is uniform, and the kneaded body is obtained after discharging;

[0049] Thinly knead the kneaded body on an open internal mixer...

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Abstract

The invention belongs to the field of environment-friendly materials, and particularly relates to a polyethylene foam material and a preparation method thereof. The polyethylene foam material comprises the following raw materials: LDPE, a foaming agent, a cross-linking agent and chitosan modified by sodium lignin sulfonate, wherein the chitosan modified by the sodium lignin sulfonate is obtained by modifying chitosan by the sodium lignin sulfonate under an acidic condition. According to the polyethylene foam material provided by the invention, the chitosan modified by sodium lignin sulfonate is combined with the cross-linking agent, the foaming agent and a small amount of LDPE, all the raw materials play a synergistic effect, and on the premise that the dosage of LDPE is reduced, the prepared foam material is stable in chemical performance, excellent in mechanical performance, recyclable and easy to degrade. In addition, the chitosan and the sodium lignin sulfonate are wide in source, easy to obtain and low in cost.

Description

technical field [0001] The invention belongs to the field of environment-friendly materials, and in particular relates to a polyethylene foam material and a preparation method thereof. Background technique [0002] Polyethylene foam material is a widely used cushioning material, which has the characteristics of low density, stable chemical properties, not easy to be corroded, friction-resistant, good processing performance, and easy to shape. Polyethylene foam materials are widely used in cushioning packaging of precision instruments, household appliances, glass, ceramic products, handicrafts, etc., and can also be made into thermal insulation containers for frozen food and hot food. [0003] Low-density polyethylene foaming materials are generally prepared by using low-density polyethylene (LDPE) as the base material and adding a small amount of additives and foaming agents. The main component is polyethylene (PE for short). Polyethylene is a thermoplastic resin obtained b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L5/08C08J9/10
CPCC08J9/103C08J9/105C08J2203/04C08J2323/06C08J2405/08
Inventor 焦建培马少怀董占琢田振领苗春燕
Owner SHIJIAZHUANG QIHONG RUBBER PLASTIC PROD
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