Unlock instant, AI-driven research and patent intelligence for your innovation.
A method for preparing foamed plastics from waste leather scraps
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 foamed plastic and scrap material technology is applied in the field of resource-based material preparation to achieve the effects of low production cost, stable cross-linking and good plasticizing effect
Active Publication Date: 2021-09-21
四川创智炜业科技有限公司
View PDF6 Cites 0 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
So far, there are no literature and patent reports on the direct use of collagen as a matrix to prepare general-purpose foamed plastics through conventional thermal processing
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
View more
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0024] The tannery leather leftovers were cleaned with deionized water to remove dust, and after extracting collagen, they were dried in a blast drying oven at 40 °C for 48 h. After drying, they were further pulverized by a pulverizer to obtain collagen particles, which were stored dry. Weigh 17.0 g of collagen, 1.2 g of glycerin, 0.4 g of dialdehyde starch, 0.4 g of baking soda, and 1.0 g of calciumcarbonate, put them into a beaker filled with appropriate amount of water, stir them in a water bath at 50°C, and put them in a drum Air drying oven was placed at 45°C for 64 h to dry and remove water to obtain a dry mixture. Take an appropriate amount of dry mixture and place it in a foaming mold, and perform hot-press foaming molding under a flat vulcanizer, and set the foaming temperature: 130°C, foaming time: 10 minutes, pressure: 0.5MPa, after it is fully melted, A foamed plastic can be obtained.
Embodiment 2
[0026] The tannery leather leftovers were cleaned with deionized water to remove dust, and after extracting collagen, they were dried in a blast drying oven at 40 °C for 48 h. After drying, they were further pulverized by a pulverizer to obtain collagen particles, which were stored dry. Weigh 16.0 g of collagen, 2.2 g of glycerin, 0.4 g of dialdehyde starch, 0.4 g of baking soda, and 1.0 g of calciumcarbonate in a beaker filled with an appropriate amount of water, stir and mix in a water bath at 50°C, and put them in a drum Air drying oven was placed at 45°C for 64 h to dry and remove water to obtain a dry mixture. Take an appropriate amount of dry mixture and place it in a foaming mold, and perform hot-press foaming molding under a flat vulcanizer, and set the foaming temperature: 130°C, foaming time: 10 minutes, pressure: 0.5MPa, after it is fully melted, A foamed plastic can be obtained.
Embodiment 3
[0028] The tannery leather leftovers were cleaned with deionized water to remove dust, and after extracting collagen, they were dried in a blast drying oven at 40 °C for 48 h. After drying, they were further pulverized by a pulverizer to obtain collagen particles, which were stored dry. Weigh 17.0 g of collagen, 1.2 g of glycerin, 0.4 g of dialdehyde starch, 0.4 g of baking soda, and 1.0 g of calciumcarbonate, put them into a beaker filled with appropriate amount of water, stir them in a water bath at 50°C, and put them in a drum Air drying oven was placed at 45°C for 64 h to dry and remove water to obtain a dry mixture. Take an appropriate amount of dry mixture and place it in a foaming mold, and perform hot-press foaming molding under a flat vulcanizer, and set the foaming temperature: 160°C, foaming time: 7 minutes, and pressure: 0.5MPa. After it is fully melted, A foamed plastic can be obtained.
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 provides a method for preparing foamed plastics by using waste leather leftovers. Its preparation method is to firstly extract collagen from the leather corner waste produced by the tannery; then mix the collagen, cross-linking agent, foaming agent, nucleating agent and plasticizer in water according to a certain proportion, and dry to remove water. ; Finally, heat-compression molding is carried out under suitable process conditions to obtain protein foam plastics. Dialdehyde starch, dialdehyde cellulose, dialdehyde pramlu and other dialdehyde macromolecules are used as cross-linking agents to carry out cross-linking modification on collagen to improve the strength of collagen. Glycerin, urea and other small molecular reagents are used as plasticizers to plasticize and modify collagen to reduce the melting temperature of collagen, so that it can be directly processed by conventional processing methods for hot pressing. The invention utilizes leather leftovers as raw materials to prepare biodegradable foamed plastics with good mechanical properties, which can be used as thermal insulation foamed plastics and has good application prospects.
Description
technical field [0001] The invention relates to the field of resource material preparation, in particular to a biodegradable foam plastic with good mechanical properties. Background technique [0002] Foam plastic is a very important synthetic polymer material and an important part of the plastics industry. Due to the characteristics of light weight, heat insulation, sound absorption, and shock absorption, foam plastics are widely used in packaging, heat preservation, and sound insulation. At present, most foamed plastic products are made from petrochemicalcracking products. These products also produce a lot of white pollution due to the disadvantage of being difficult to degrade. Therefore, seeking degradable materials to process foam plastics has become a research hotspot. The leather industry produces a large amount of leather waste every year, which is one of the important pollutions of the leather industry. These solid wastes are rich in collagen. If collagen can be...
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