Unlock instant, AI-driven research and patent intelligence for your innovation.
Production technique of novel extrusion-molding polylactic acid foaming sheet
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A production technology, a technology of plastic polymerization, which is applied in the field of preparation of extruded polylactic acid micro-foamed sheets, can solve the problems of harsh production process conditions, high requirements on matrix fluidity, difficult process control, etc., and achieves simple molding equipment. Efficient, fully explainable performance, excellent comprehensive effect
Inactive Publication Date: 2018-12-07
BEIJING UNIV OF CHEM TECH
View PDF0 Cites 11 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0003] Polylactic acid foamed sheets can be prepared by physical or chemical foaming. The physical foaming method mainly includes the supercritical carbon dioxide foaming method, and its disadvantages are high requirements for equipment and high process costs; chemical foaming methods mainly It is formed by adding a chemical foaming agent such as AC foaming agent to the matrix. The disadvantage is that it has high requirements on the fluidity of the matrix, strict requirements on the production process conditions, and the process is difficult to control.
Method used
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
[0032] Under the conditions of 150-160°C and a rotational speed of 30r / min, use a twin-screw extruder to extrude the prepared materials into granules.
[0047] Under the conditions of 150-160°C and a rotational speed of 30r / min, use a twin-screw extruder to extrude the prepared materials into granules.
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
Login to View More
PUM
Login to View More
Abstract
The invention relates to a production technique of a novel extrusion-molding polylactic acid foaming sheet, belonging to the machining field of high molecular materials. The production technique is characterized by comprising the steps of firstly preparing a foamed master batch, modifying polylactic acid, and carrying out extrusion molding on 3-12 parts of the foamed master batch, 100 parts of a polymer matrix, 3-20 parts of a processing aid and 10-50 parts of a filler by virtue of a single screw rod, so as to obtain the polylactic acid foaming sheet. The production technique has the beneficial effects that common physical and chemical foaming methods are replaced, the low-cost polylactic acid foaming sheet is successfully prepared, the production cost of the polylactic acid foaming sheetis lowered on the premise that the mechanical property of the sheet is guaranteed, foaming equipment is simple and efficient, the foaming rate is increased, and the production technique has relativelyhigh application values.
Description
technical field [0001] The invention relates to a novel extruded polylactic acid foamed sheet production technology, and the preparation of extruded polylactic acid micro-foamed sheet with simple and efficient molding equipment, high foaming ratio, excellent mechanical properties and low production cost. Background technique [0002] Polylactic acid foamed sheet is a new material for preparing foamed products because of its good biodegradable properties, environmental protection and pollution-free, good mechanical properties and water resistance. It can be widely used in packaging, automobiles, construction, synthetic wood and other fields. [0003] Polylactic acid foamed sheets can be prepared by physical or chemical foaming. The physical foaming method mainly includes the supercritical carbon dioxide foaming method, and its disadvantages are high requirements for equipment and high process costs; chemical foaming methods mainly It is formed by adding a chemical foaming ag...
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
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More