CN102516491B - Low-resilience headrest foam and preparation method thereof - Google Patents

Abstract

The invention relates to a low-rebound headrest foam and a preparation method thereof. The components of the foam are high-activity polyether, trihydroxy polyether, polymer polyol, foam stabilizer, alcohol crosslinking agent, complex amine catalyst and water and modified MDI. The preparation method includes mixing the components, pouring the injection at 10-12MPa into the headrest mold with the surface protection material, and demoulding after 60-90 seconds. The low-resilience foam produced by the invention has a wide index adjustment range, and the mold does not need to be heated, the process is simple, there are no three wastes, energy consumption is saved, auxiliary heating equipment is saved, and production efficiency is improved. The low-resilience foam foamed by PIP is applied to the headrest of the car, which not only maintains the elasticity within a certain range, and the rebound rate is between 22 and 28%, but also because of its unique energy-absorbing effect, it can protect the car under high vibration. It plays a role of dispersion and cushioning during impact and impact, which improves the comfort and safety of passengers.

Description

A kind of low resilience headrest foam and preparation method thereof

technical field

The invention belongs to the field of automobile headrest foam and its preparation, in particular to a low-rebound headrest foam and a preparation method thereof.

Background technique

The car headrest is a kind of driving comfort configuration product and safety protection product. When a vehicle collides with the rear, the human body will fall backwards due to inertia. At this time, the pressure of vehicle acceleration or deceleration is concentrated on the fragile neck and head of the human body, and the headrest acts as a buffer to protect the human head. In addition to enhancing driving safety, car headrests also have a decorative effect.

At present, the car headrest foam on the market is mainly high rebound, and its rebound rate is between 50% and 58%. Although the elasticity is good, the rebound force generated when the car bumps and vibrates is also large. Not comfortable.

Contents of the invention

The technical problem to be solved by this invention is to provide a kind of low resilience headrest foam and its preparation method. The low resilience foam foamed with PIP is applied to the automobile headrest. Between 28%, and because of its unique energy-absorbing effect, it can disperse and buffer the car under high vibration and impact, improving the comfort and safety of the passengers.

A kind of low resilience headrest foam of the present invention, the component of described foam is:

A component material: by weight, 0-60 parts of trihydroxy polyether, 10-40 parts of polymer polyol, 0-1.5 parts of foam stabilizer, 0.2-2 parts of diethanolamine, 1-3.5 parts Bis-(3-dimethylaminopropyl)amino-2-propanol, 0.1 to 1 part of trimethylhydroxyethylethylenediamine and 2 to 4 parts of water;

B component material: modified MDI (NE135 modified MDI produced by DOW); the weight ratio of component A to component B is 100:55±5.

The acid value of the highly active polyether is 35-50 mg KOH/g.

The acid value of the trihydroxy polyether is 230-250 mg KOH/g.

The solid content of the polymer polyol is 30-40%.

The foam stabilizer is L-580 or Y-10366.

The foam isocyanate index used in the headrest is 0.95-1.15.

A kind of preparation method of low resilience headrest foam of the present invention comprises:

(1) By weight, 0-60 parts of trihydroxy polyether, 10-40 parts of polymer polyol, 0-1.5 parts of foam stabilizer, 0.2-2 parts of diethanolamine, 1-3.5 parts of Bis-(3-dimethylaminopropyl)amino-2-propanol, 0.1 to 1 part of trimethylhydroxyethylethylenediamine and 2 to 4 parts of water are poured into the premixed reaction kettle and stirred at room temperature The mixture was obtained, then filtered and sealed for storage;

(2) Take the above mixture as the A component material, and use the modified MDI as the B component material; adjust the temperature of the A and B materials to 25-35°C, and press the weight ratio of 100:55±5 at 10-12MPa Inject it into the headrest mold with surface protection material, and demould after 60-90 seconds to get the headrest with low resilience foam.

Beneficial effect

(1) The present invention adopts full water foaming technology, the foam is perforated, and has good air permeability. Compared with polyurethane in indoor furniture, it not only maintains performance in terms of mechanical strength, but also is safe and environmentally friendly, and its atomization rate reaches more than 99%; The resulting low-resilience foam has a wide index adjustment range, and the mold does not need to be heated, the process is simple, and there is no three wastes, saving energy and auxiliary heating equipment, and improving production efficiency;

(2) The low-resilience foam foamed by PIP in the present invention is applied on the automobile headrest, which has not only maintained elasticity in a certain range, and the rebound rate is between 22% and 28%, and because of its unique energy absorption effect, it can It can disperse and buffer the car under high vibration and impact, and improve the comfort and safety of the passengers.

Detailed ways

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Example 1

(1) By weight, 20 parts of high-activity polyether, 60 parts of trihydroxy polyether, 40 parts of polymer polyol, 1.5 parts of L-580, 0.2 part of diethanolamine, 1 part of bis- (3-Dimethylaminopropyl) amino-2-propanol, 0.1 part of trimethyl hydroxyethyl ethylenediamine and 2 parts of water are poured into the premixed reactor, stirred at normal temperature to obtain the mixture, then filtered and Sealed storage;

(2) Use the above-mentioned mixture as the A component material, and use the modified MDI as the B component material; adjust the material temperature of the A and B materials to 25°C, and inject it at 10MPa according to the weight ratio of 100:50 In the headrest mold of the material, after 60 seconds, the mold is demoulded to obtain a headrest with low resilience foam.

Example 2

(1) By weight, 80 parts of high-activity polyethers, 10 parts of trihydroxy polyethers, 10 parts of polymer polyols, 0.5 parts of Y-10366, 2 parts of diethanolamine, 3.5 parts of bis- (3-Dimethylaminopropyl) amino-2-propanol, 1 part of trimethylhydroxyethylethylenediamine and 4 parts of water are poured into the premixed reactor, stirred at normal temperature to obtain the mixture, then filtered and Sealed storage;

(2) Use the above-mentioned mixture as component A material, and use modified MDI as component B material; adjust the material temperature of A and B materials to 35°C, and inject it at 12MPa with a protective surface according to the weight ratio of 100:60 In the headrest mold of the material, after 90 seconds, the mold is demoulded to obtain a headrest with low resilience foam.

Claims (5)

1. A low-rebound headrest foam, characterized in that: the foam consists of: A component material: by weight, 20-80 parts of high-activity polyether, 0-60 parts of trihydroxy polyether, 10-40 parts of polymer polyol, 0-1.5 parts of foam stabilizer, 0.2- 2 parts of diethanolamine, 1 to 3.5 parts of bis-(3-dimethylaminopropyl)amino-2-propanol, 0.1 to 1 part of trimethylhydroxyethylethylenediamine and 2 to 4 parts of water ; Among them, the acid value of highly reactive polyether is 35-50㎎KOH/g; the acid value of trihydroxy polyether is 230-250㎎KOH/g, and trihydroxy polyether does not take 0; B component material: modified MDI; the weight ratio of A component to B component is 100:55±5; among them, the modified MDI is NE135 modified MDI produced by DOW company. 2. The low-resilience headrest foam according to claim 1, characterized in that: the solid content of the polymer polyol is 30-40%. 3. A low-rebound headrest foam according to claim 1, characterized in that: the foam stabilizer is L-580 or Y-10366. 4. The low-resilience headrest foam according to claim 1, characterized in that: the isocyanate index of the foam used in the headrest is 0.95-1.15. 5. a preparation method of low resilience headrest foam as claimed in claim 1, comprising: (1) By weight, 20-80 parts of high-activity polyether, 0-60 parts of trihydroxypolyether, 10-40 parts of polymer polyol, 0-1.5 parts of foam stabilizer, 0.2-2 Parts of diethanolamine, 1 to 3.5 parts of bis-(3-dimethylaminopropyl) amino-2-propanol, 0.1 to 1 part of trimethylhydroxyethylethylenediamine and 2 to 4 parts of water into a premixed reactor, stirred at room temperature to obtain a mixture, then filtered and sealed for storage; (2) Take the above mixture as the component A material, and use the modified MDI as the component B material; adjust the material temperature of A and B materials to 25-35°C, and press the weight ratio of 100:55±5 at 10-12MPa Inject it into the headrest mold with surface protection material, and demould after 60-90 seconds to get the headrest with low resilience foam.