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Soft polyurethane foam, preparation method and application thereof and polyurethane packaging foam
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A soft polyurethane and foam technology, applied in the field of polyurethane, can solve the problems of inconvenient operation on the foaming site, difficult market popularization and promotion, etc., and achieve the effects of uniform density distribution, low foam density and fine cells.
Pending Publication Date: 2022-01-11
南京美思德新材料有限公司
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Problems solved by technology
Since TDI-50 is not a regular product in the market, and the excessive use of TDI-50 and MC will bring inconvenience to the foaming site operation
This technical solution is difficult to popularize in the market
Method used
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preparation example Construction
[0060] In a second aspect, an embodiment of the present invention provides a method for preparing a flexible polyurethane foam, comprising:
[0061] i) Form the polyether polyol premix components:
[0062] Specifically, the following 1)-5) components are mixed,
[0063] Wherein, polyether polyol and / or polymer polyol, the hydroxyl value of the polyether polyol and the polymer polyol are both 20-60mgKOH / g, and the functionality is 2-4; the polyether polyol % of the quality of the polyether polyol premix component; the amount of the polymer polyol accounts for 0-30wt.% of the quality of the polyether polyol premix component %;
[0064] 2) physical blowing agent, the consumption of described physical blowing agent accounts for 10-60wt.% of the quality of described polyether polyol premix component;
[0065] 3) a foam stabilizer, the amount of the foam stabilizer accounts for 0.5-5wt.% of the total mass of all raw materials forming the flexible polyurethane foam;
[0066] 4) c...
Embodiment 1-6
[0093] Adopt the raw material described in table 1 and table 2 and its amount to prepare soft polyurethane foam, concrete method is as follows:
[0094]Mix polyether polyol, polymer polyol, foaming agent, foam stabilizer, catalyst, water and stir evenly to obtain mixture A) polyether polyol premix component, and A) polyether polyol premix Add the material components into the A component material working tank in the foaming machine and start the stirring device. Among them, the foaming machine includes A component material working tank and B component material working tank, A material lifting pump and B material lifting pump, A proportional pump and B proportional pump, A material tube and B material tube, and a charging cavity . Among them, the A feeding pump, the A proportional pump and the A feeding pipe are connected in sequence, the B feeding pump, the B proportional pump and the B feeding pipe are connected in sequence, and the A feeding pipe and the B feeding pipe are b...
Embodiment 1- Embodiment 3
[0096]
[0097]
[0098] According to Table 1, it can be seen that the flexible polyurethane foam prepared by using Jiangsu Mesid silicone surfactant M-6623LV-A, M-6623LV-B and M-6623LV-C has low foam density, high strength and good foam cushioning performance , which can meet the requirements of packaging materials for polyurethane foam.
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Abstract
The invention relates to the technical field of polyurethane, in particular to soft polyurethane foam, a preparation method and application thereof and polyurethane packaging foam. The soft polyurethane foam is obtained by reacting a polyether polyol premix component with an isocyanate component, wherein the isocyanate component comprises organic polyisocyanate, and the polyether polyol premix component comprises the following components: 1) polyether polyol and / or polymer polyol, wherein the hydroxyl value of the polyether polyol and the hydroxyl value of the polymer polyol are both 20-60 mgKOH / g, and the functionality of the polyether polyol and the functionality of the polymer polyol are both 2-4; 2) a physical foaming agent; 3) a foam stabilizer; 4) a catalyst; and 5) a chemical foaming agent. The soft polyurethane foam provided by the embodiment of the invention is low in foam density, good in strength and excellent in buffering performance, meets the technical requirements of a packaging material on ultra-low-density foam, and provides a larger technological tolerance level for production of the ultra-low-density soft polyurethane foam.
Description
technical field [0001] The invention relates to the technical field of polyurethane, in particular to flexible polyurethane foam, its preparation method, its application and polyurethane packaging foam. Background technique [0002] With the development of modern logistics industry and the improvement of people's living standards, packaging materials are more and more valued by people. At present, many advanced instruments and equipment have abandoned the commonly used polyvinyl chloride foam and other materials, and switched to polyurethane foam for packaging. Especially for some precision instruments and equipment, fragile products, handicrafts and fresh fruits, in order to facilitate logistics and transportation, it is even more required to choose suitable packaging materials. Polyurethane packaging foam is an excellent packaging material. It is light in weight, hygienic, safe and reliable, easy to process, and can be prefabricated into various shapes to meet various pac...
Claims
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Application Information
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