High-efficiency heat-insulation environmentally-friendly flame-retardant modified polyolefin indoor heat-insulation foam and preparation method thereof
A polyolefin, environmentally friendly technology, applied in the direction of climate sustainability, sustainable manufacturing/processing, chemical industry, etc., can solve the problems of large combustion smoke, not environmental protection, low thermal insulation effect, etc. Insulates the conduction of heat energy and saves energy
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Embodiment 1
[0035] Example 1: A method for preparing a high-efficiency, heat-insulating, environmentally friendly, and flame-retardant modified polyolefin indoor thermal insulation foam. The preparation method includes the following steps in sequence:
[0036] The first step: preparation of flame retardant masterbatch A: first take 20 parts by weight of low density polyethylene resin, 30 parts by weight of composite flame retardant, 8 parts by weight of smoke suppressant, 0.3 parts by weight of antioxidant 1010, 0.6 parts by weight Lubricants in parts by weight, kneaded at room temperature for 3-5 minutes, and then discharged into the banbury mixer for banburying. The banbury temperature is 100±5°C, and the banbury time is 6-8 minutes. The flame retardant masterbatch A is obtained by forced feeding into a single-screw extrusion granulator, melted and plasticized and granulated; the composite flame retardant is a compound of microencapsulated ammonium polyphosphate and zinc borate, off-whit...
Embodiment 2
[0058] The first step, the second step, the fourth step, and the fifth step are the same as in Example 1, except that the third step: the low-density polyethylene resin in the preparation of sheet C is 20 parts by weight, ethylene-vinyl acetate copolymer 30 parts by weight, 10 parts by weight of EPDM rubber, 30 parts by weight of flame retardant masterbatch A, 20 parts by weight of foam masterbatch B, 15 parts by weight of hollow ceramic microbeads, and 3 parts by weight of rheological agent 3 parts by weight and lubricant are added in the high mixer.
[0059] The main technical indicators of the gained thermal insulation foam product:
[0060] Appearance: smooth without color difference;
[0061] Product foaming ratio: 30;
[0062] Product Shore hardness: 60A;
[0063] Thermal conductivity: 0.015 ;
[0064] The combustion performance level is: A2-s1, d1, t0 level;
[0065] Lead (Pb) content: ≤5PPM;
[0066] Cadmium (Cd) content: ≤5PPM;
[0067] Hexavalent chromium (C...
Embodiment 3
[0073] The first step, the second step, the fourth step, and the fifth step are different from Example 1 in the third step: the preparation of sheet C is 15 parts by weight of low-density polyethylene resin, and 25 parts by weight of ethylene-vinyl acetate copolymer. Parts by weight, EPDM rubber is 7 parts by weight, flame retardant masterbatch A is 25 parts by weight, foam masterbatch B is 13 parts by weight, hollow ceramic microspheres are 12 parts by weight, rheological agent is 2.5 parts by weight, The lubricant is 2.5 parts by weight.
[0074] The main technical indicators of the gained thermal insulation foam product:
[0075] Appearance: smooth without color difference;
[0076] Product expansion ratio: 15;
[0077] Product Shore hardness: 40A;
[0078] Thermal conductivity: 0.015 ;
[0079] The combustion performance level is: A2-s1, d1, t0 level;
[0080] Lead (Pb) content: ≤5PPM;
[0081] Cadmium (Cd) content: ≤5PPM;
[0082] Hexavalent chromium (Cr) content...
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