A kind of polyurethane flexible foam composite material and its production process

A polyurethane soft foam and production process technology, which is applied in the field of polyurethane soft foam composite materials and its production process, can solve the problems of decreased mite repellent effect and loss of coat repellent components, and achieve the effects of saving investment, stable properties, and not easy to separate out

Active Publication Date: 2018-10-19
宁波明辉寝具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of using mite-repelling fabrics to make coats is that washing will cause the loss of the mite-repelling components of the coat, resulting in a decrease in the repellent effect

Method used

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  • A kind of polyurethane flexible foam composite material and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Preparation of semi-open cell polyurethane soft foam particle composite material

[0030] Step 1, preparing semi-open-cell polyurethane soft foam particles

[0031] 1.1 Put polyether polyol, crosslinking agent, catalyst, foaming stabilizer, and cell opening agent into the A raw material tank according to the process requirements, and fully stir and mix them to obtain A material;

[0032] 1.2 According to the process requirements, put polyether polyol and isocyanate into the raw material tank of B, stir and mix them well to obtain material B;

[0033] 1.3 Fully mix material A and material B according to the ratio of one to one and inject into the foaming chamber;

[0034] 1.4 Keep warm at 50-90°C for 1-5h;

[0035] 1.5 Take out the foamed semi-open polyurethane flexible foam from the foaming chamber, cool to room temperature and crush it into particles with a maximum particle size of 2-6mm. The particle size of particle should be advisable with the feeding pip...

Embodiment 2

[0047] Example 2 Preparation of Composite Material Containing Mite Inhibiting Components

[0048] Step 1, preparing particle materials containing mite-inhibiting components

[0049] 1.1 Put polyether polyol, crosslinking agent, catalyst, foaming stabilizer, and cell opening agent into the A raw material tank according to the process requirements, and fully stir and mix them to obtain A material;

[0050] 1.2 Put polyether polyol, isocyanate, and dimethyl phthalate into the raw material tank of B according to the process requirements, and mix them well to obtain material B; among them, dimethyl phthalate is selected from Shanghai Jinshan Jingwei Chemical Co., Ltd. The company's industrial-grade products;

[0051] 1.3 Fully mix material A and material B according to the ratio of one to one and inject into the foaming chamber;

[0052] 1.4 Keep warm at 50-70°C for 1-5h;

[0053] 1.5 Take out the foamed semi-open polyurethane flexible foam from the foaming chamber, cool to room...

Embodiment 3

[0055] Example 3 Preparation of Closed Cell Polyurethane Soft Foam Particle Composite Material

[0056] Step 1, using recycled materials to prepare closed-cell polyurethane soft foam particles

[0057] 1.1 Pulverize the recovered closed-cell polyurethane soft foam to obtain particles with a maximum particle size of 2 to 3 mm. The particle diameter of particle should be advisable with the feed pipeline of the high-pressure polyurethane foaming machine that step 4 is used;

[0058] 1.2 Soak and stir the closed-cell polyurethane soft foam particles with an organic solvent, and clean the residual dust, release agent, plasticizer, etc. on the surface, and the cleaning time is 30 to 60 minutes;

[0059] 1.3 Separate the closed-cell polyurethane flexible foam particles from the organic solvent, and completely volatilize the organic solvent remaining on the surface. Step 2: Prepare raw materials for substrate production

[0060] 2.1 According to the finished product density is 25-2...

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Abstract

The invention discloses a polyurethane soft foam composite material and a production technology thereof. The composite material is prepared by combining a base material and a particle material; wherein the base material is open-celled polyurethane soft foam, and the particle material is one or two of semi-open-celled polyurethane soft foam and closed-celled polyurethane soft foam. The production technology comprises the following steps: (1) grinding and washing the particle material, and then infiltrating the particle material in polyol; (2) after polyol infiltration, mixing the particle material with a foaming agent and isocyanate, and then subjecting the mixture to steps of foaming, cutting, aging, and moulding to obtain the polyurethane soft foam composite material according to the production technology of open-celled polyurethane soft foam. The provided production technology has the advantages that the original equipment, technological procedure, and basic formula are not changed, the provided technology is simple and practicable, the investment is saved; the prepared polyurethane composite material has a stable property, the compatibility between particle material and base material is good, and thus the particle material will not be precipitated out easily.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a flexible polyurethane foam composite material and a production process thereof. Background technique [0002] Flexible Polyurethane Foam (Flexible Polyurethane Foam, referred to as polyurethane soft foam) refers to a flexible polyurethane foam with certain resilience properties, usually using polyisocyanate (such as TDI, MDI, PAPI, etc.) as the main raw material, and polyether, Polyester or other polyols and other raw materials are mixed and reacted to obtain porous polymer materials. [0003] The reaction process of flexible polyurethane foam has three characteristics: no external heating is required, and the entire reaction process can be completed through self-heating of the reaction. After the raw materials are mixed, the temperature of the reaction system rises rapidly to 70-150 °C; Complete foaming and setting; the volume changes greatly, and the expansion rate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08J9/35
CPCC08J9/35C08J2205/05C08J2205/052C08J2375/04C08J2475/04C08L75/04C08L2205/025
Inventor 崔嘉杨沈磊
Owner 宁波明辉寝具有限公司
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