Micro-foamed plylactic acid material and preparation method thereof

A polylactic acid and micro-foaming technology, which is applied in the field of polylactic acid micro-foaming materials and its preparation, can solve problems such as low melt viscosity and melt strength, small number of molecular branched chains of PLA, and easy bursting of bubbles, etc., to achieve Uniform cell size, simple foaming process, and low material density
CN104910596AInactive Publication Date: 2015-09-16常州龙骏天纯环保科技有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
常州龙骏天纯环保科技有限公司
Publication Date
2015-09-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a micro-foamed plylactic acid material and a preparation method thereof. The disadvantages of high application cost, poor toughness, small quantity of molecular branched chains, unstable processing, easy molecular chain fracture, low melt viscosity and strength, and unfavourable foaming molding of polylactic acid are overcome in the invention. The method comprises the following steps: preparing a dibenzoyl peroxide tackified polydactyl acid / poly(butylene succinate) composite material through a melt blending technology, preparing a sample through compression molding, swelling the sample with supercritical carbon dioxide as a foaming agent, and rapidly releasing pressure to obtain the micro-foamed plylactic acid material. The preparation method has the advantages of low temperature foaming, high speed pressure relief, simple foaming process and short time, and the micro-foamed plylactic acid material prepared in the invention has the advantages of uniform cell dimension, large cell density and small material density.
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Description

technical field

[0001] The invention relates to a polylactic acid micro-foaming material and a preparation method thereof. Background technique

[0002] Polylactic acid (PLA) has two major advantages of biodegradability and plant origin, and can be processed in various molding processes like other common petroleum-based polymers. Its foaming materials can be used in many fields such as cushioning packaging, heat insulation, agriculture, forestry and gardening, etc. Therefore, it is of great significance to study PLA foam materials. At present, there are still big problems in the foaming process of polylactic acid. The number of molecular branches of PLA is small, the melt viscosity and melt strength are low, the melt viscoelasticity is poor, and the pure PLA melt is more sensitive to temperature. , The melt viscosity decreases rapidly with the increase of temperature. All these factors lead to insufficient strength of the bubble wall film during foaming, easy rupture of the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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