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Method for producing environmental-protection type sound-absorbing and flame-retardant sponge

A production method and an environment-friendly technology, which is applied in the field of production of environment-friendly sound-absorbing and flame-retardant sponges, can solve problems such as insufficiently stable flame-retardant performance, unenvironmentally friendly sound-absorbing, and harmfulness to the human body, and achieve various sound-absorbing and noise-reducing effects, flame-retardant and fire-resistant Superior performance, stable flame retardant and fireproof performance

Inactive Publication Date: 2010-08-18
WUXI JINGSHANG FOAM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] There are four main deficiencies in the sound-absorbing sponge produced by the existing technology: first, the sound-absorbing effect is ideal at low frequencies but cannot meet the requirements of broadband; second, the flame-retardant performance is not stable enough; third, the product contains bromine, which is harmful to the human body; The service life is relatively low in direct sunlight
The shortcomings of traditional soft polyurethane foam sponges are not fireproof, easy to burn, high in heavy metal content, not environmentally friendly, and poor sound absorption caused by too many closed cells, which need to be improved urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1), raw material ratio:

[0034] Raw materials were prepared by the following weights: toluene diisocyanate 50kg; polyether 100kg; water 3.7kg; silicone (stabilizer) 1.2kg; amine (catalyst) 0.2kg; tin (catalyst) 0.3kg; BK-69 (flame retardant) 15kg

[0035] 2), mixed reaction:

[0036] Send water, catalyst, stabilizer, foaming agent, flame retardant, toluene diisocyanate and polyether into the mixing head at the same time for mixing reaction; stirring and mixing time is 5 seconds, the temperature is 21°C-23°C; the pressure of the mixing head is 0.25Pa;

[0037] 3) Foaming: Pour the mixed material into the foaming box, and get the finished sponge after chain extension, foaming, crosslinking and curing reactions. The reaction time is 2 minutes.

[0038] Polyurethane polymer materials are block copolymers composed of rigid segments and soft segments. Alcohol compounds and amine compounds produce chain extension (commonly known as foaming) process, which makes the mixed ...

Embodiment 2

[0041] The ratio of raw materials by weight is: toluene diisocyanate 45kg; polyether 100kg; water 4.5kg; stabilizer 1kg; catalyst 0.6kg; foaming agent 1kg; flame retardant 20kg;

[0042] Gauze, film or gauze net is compounded on the surface of the finished sponge.

Embodiment 3

[0044] The ratio of raw materials by weight is: toluene diisocyanate 55kg; polyether 100kg; water 3kg; stabilizer 1.5kg; catalyst 0.3kg; foaming agent 3kg; flame retardant 10kg;

[0045] Through the processing of mechanical equipment such as exhaust machine, embossing machine, computer profiling machine, etc., the surface of the finished sponge product is exhausted and embossed to produce egg flower-like and wavy surfaces, increasing the sound-absorbing area, and making the product improve the opening of the product through exhaust. The effect makes the surface of the product suitable for the shape of sound absorption and noise reduction, making the frequency of sound absorption and noise reduction wider and the coefficient higher.

[0046] The present invention firstly solves the problem of sponge opening. In selecting the amount of stabilizer, the degree of sponge opening ensured by the stabilizer is tested repeatedly to adjust and produce the best sound-absorbing sponge; sec...

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PUM

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Abstract

The invention discloses a method for producing an environmental-protection type sound-absorbing and flame-retardant sponge. The method comprises the following steps of: (1) raw material proportioning: weighting the following raw materials in parts by weight: 50 parts of toluene di-isocyanate, 100 parts of polyether, 3.7 parts of water, 1.2 parts of stabilizer, 0.5 part of catalyst, 2 parts of foaming agent, and 15 parts of flame retardant; (2) mixing reaction, adding the toluene di-isocyanate and polyether into a stirring tank, and uniformly stirring; delivering the water, stabilizer, catalyst, foaming agent and flame retardant and the uniformly mixed toluene di-isocyanate and polyether into a mixing head to carry out mixing reaction at the temperature of 21 DEG C-23 DEG C under the pressure of 0.25Pa; (3) foaming, punching the mixture into a foaming box, and carrying out chain extension, foaming, crosslinking and solidifying to obtain the finished sponge. The produced sound-absorbing and flame-retardant sponge has multiple sound-absorbing and flame-retardant effects, thereby satisfying the multiple sound-absorbing and flame-retardant requirements; the sound-absorbing and flame-retardant property is stable, the bromine is eliminated, and the heavy metal content achieves the environment protection requirement; and the service life is prolonged.

Description

technical field [0001] The invention relates to a production method of chemical products, in particular to an environment-friendly production method of sound-absorbing and flame-retardant sponge. Background technique [0002] The name of the sponge specification should be called flexible polyether polyurethane foam. In terms of material composition, sponge belongs to polyurethane. Polyurethane is a general term for the department engaged in the manufacture and application of polyisocyanate in the plastics industry. The polymers related to this are collectively referred to as "polyurethane", abbreviated as PU. In terms of category, sponge belongs to polyurethane foam. One thing to note is that foam refers to foamed polyurethane. [0003] Polyurethane foam is divided into three types: soft foam, semi-rigid foam and hard foam: [0004] Soft foamed polyurethane foam is sponge, its physical and chemical properties are: density: 0.03 ~ 0.07g / cm 3 , Tensile strength: 8.83 ~ 117...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08J9/14
Inventor 王育明廉伯平
Owner WUXI JINGSHANG FOAM
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