来源网址：http://www.rsoau.com 2019-04-16 14:06:58
The technical principle of additives for biodegradable materials, usually synthetic polymers, such as polyethylene and polypropylene, are not easily biodegradable in natural environment. This is because their huge molecular weight (about 250,000) enables microorganisms to digest them as energy sources. There are also some low molecular weight compounds in nature, such as the secretions from trees (resins, etc., except natural rubber), whose chemical structure is similar to that of polyolefins. Therefore, in order for synthetic polymers of high molecular weight to be biodegraded, their molecular weight must be reduced to be equivalent to those of low molecular weight compounds in nature (between 5,000 and 10,000). This goal can be achieved through contact reactions with certain metal ions (i.e. pre-oxidants). For example, "Norrish" chemical reactions have been discovered for many years. These free radical peroxidation reactions can be summarized as follows. This process is repeated through the regeneration of free radicals and metal ions.
When the molecular chain breaks, a carbonyl group forms at the breaking point. The degradation level of plastics can be tracked by measuring the number of carbonyl groups, which provides convenience for determining the degradation degree of plastics. With the decrease of molecular weight, the polymer begins to embrittle and powder. When the molecular weight is reduced to less than 10,000, it is easily eroded by natural microorganisms such as bacteria and fungi. Cellulose in additives promotes the growth of bacteria and completes the second step of biodegradation process. This natural decomposition process gradually transforms low molecular weight polymers into biomass until they are completely biodegraded into carbon dioxide and water. The granular flexible dynamic sealing filler with granular filler adopts a new technology, and it is far superior to the traditional filler with scientific principles and unique processing technology, plus advanced technology development. Therefore, it has a great transcendence in energy saving, environmental protection, high efficiency and safety. It has reached the world level and has broad market prospects. Whether you are an end user, an agent or an enterprise, we will adhere to the products and services that we provide with our heart, sincerity and sincerity. In the future, granular flexible dynamic sealing filler will be favored by many enterprises because of its advantages of energy saving and environmental protection.
Under the severe situation of increasingly scarce petroleum resources and increasingly prominent environmental problems, Xinke people will make positive contributions to the sustainable development of society and our green earth through their own efforts to continuously develop excellent biomass products to relieve the pressure of the earth's environment and replace petroleum by-product resources. The company has a production base for customers to visit. We are willing to provide large, medium and small scale technology projects for all sectors of society. Provide technical advice and provide technical support for local resource development. The company is in line with the business purpose of honesty and cooperation, seeking common development and benefiting the society. Practical and enterprising, pioneering and innovative is our business philosophy.
Scope This standard specifies the main types, basic technical requirements, appearance and performance, hygienic requirements, degradability, inspection methods, inspection rules and product marks, packaging, transportation and storage requirements of disposable degradable tableware. This standard is applicable to disposable tableware made of photobiodegradable materials or biodegradable materials. Temperature resistance, hygienic requirements and degradability of disposable pulpable instant noodle bowls should also meet this standard. 2 Reference Standard (outline) 3 Definition (outline) 4 Product classification can be divided into the following two categories according to degradation mode, raw materials and production process: 4.1 Biodegradable materials: (1) Paper (paperboard coating, pulp moulding); (2) Plant fiber moulding (cold pressing, hot pressing and foaming); (3) Food powder moulding 4.2 Photo-biodegradable materials: Unfoaming plastic (non-foaming) type 5 basic technical requirements 5.1 must be non-toxic, harmless, clean and pollution-free, in line with our product hygiene and environmental protection regulations, standards of raw materials to produce a disposable degradable catering bureau. </p><p> We always put technological innovation in the front, market-oriented. We look forward to more people of insight jointly paying attention to energy conservation and environmental protection, and jointly exploring this emerging market in the field of environmental protection! The company has a production base for customers to visit. We are willing to provide large, medium and small scale technology projects for all sectors of society. Provide technical advice and provide technical support for local resource development. Under the severe situation of increasingly scarce petroleum resources and increasingly prominent environmental problems, Xinke people will make positive contributions to the sustainable development of society and our green earth through their own efforts to continuously develop excellent biomass products to relieve the pressure of the earth's environment and replace petroleum by-product resources.