Polyester type ultra-low density polyurethane resin for shoes

An ultra-low-density polyurethane shoe technology, applied in footwear, applications, clothing, etc., can solve problems such as unfavorable production efficiency and economic benefits, shrinkage and deformation of insole products, and high density, so as to achieve good appearance and surface effects and improve product grades , the effect of low density

Active Publication Date: 2008-03-26
无锡双象新材料有限公司
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The rebound of the improved insole product has improved, but the molding is still relatively slow, and it still takes 6 to 8 minutes to be demolded, and the insole product still has shrinkage and deformation, and the density is relatively high, which affects production efficiency and economy. Extremely unfavorable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The molding and processing conditions of polyester ultra-low density polyurethane resin for shoes are as follows: component A and component B are preheated in an oven at 60±5°C for 4 to 6 hours, then take out component C and add it to component A. Make up the A component mixture. The amount of C is generally 1.22 to 1.5% of A.

[0037] (1) Manual operation: Weigh 100 parts of component A and 62 parts of component B, and pour them into the mold cavity for foaming under 2500r / min strong stirring for 5-9 seconds.

[0038] (2) Mechanical operation: pour the mixed components into material tank A of the shoe-making machine, circulate in the shoe-making machine through a metering pump, and measure during the pouring operation. Component B is poured into the material tank B of the shoe-making machine, circulated in the shoe-making machine through a metering pump, and is metered during the pouring operation.

[0039] (3) The mixing equivalent of the mixed components is about 1...

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PUM

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Abstract

The present invention is the recipe of three component polyurethane resin for insole. The polyurethane resin includes one component A of active hydrogen-containing mixture comprising long chain polyol polymer, chain expanding agent, cross-linking agent, surfactant, foaming agent and other assistants; one component B comprising polyester or polyether modified MDI pre-polymer; and one component C or catalyst component of glycol solution of triethylidene diamine. The polyurethane resin has density as low as 0.25-0.30 g / cu cm, capacity of making the product firm and good in appearance, and other advantages.

Description

technical field [0001] The invention relates to a three-component resin for shoes, in particular to a polyester type ultra-low density polyurethane resin for shoes, which is mainly used in the production of insoles. Component A is a hydroxyl (OH) raw material, which is a mixture containing active hydrogen, and is mainly composed of long-chain polymerized polyols, chain extenders, crosslinking agents, surfactants, foaming agents and other additives. Component B is isocyanate (NCO) raw material, mainly 4.4 diphenylmethane diisocyanate (MDI) prepolymer modified with polyester or polyether. Component C is a catalyst, which is composed of triethylenediamine in ethylene glycol solution. When using, generally a certain amount of component C is added to component A, mixed evenly, used as a component, and then reacted with component B. Among them, the main purpose of storing components A and C separately is to extend the shelf life so that the resin is not easy to deteriorate. tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/42C08G18/48C08J9/00A43B1/14
Inventor 何天华毛本春许磊吴宇
Owner 无锡双象新材料有限公司
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