CN1137177C

CN1137177C - Productive technology for double-density polyurethane foam pad material

Info

Publication number: CN1137177C
Application number: CNB00116029XA
Authority: CN
Inventors: 邓万学
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-13
Filing date: 2000-09-13
Publication date: 2004-02-04
Anticipated expiration: 2020-09-13
Also published as: CN1296023A

Abstract

The present invention relates to productive technology of a polyurethane foam pad material, particularly to productive technology of a pad material for enhancing taking comfort for chairs of an automobile, a train, an airplane, etc. Secondary pouring integral forming technology is used, and the pad material poured at the previous step is heated to moderate temperature. The present invention has the advantages of simple production processes, good integrity, firm bonding of foam with different density, natural transition and no rigid gluing seam or traces.

Description

Productive technology for double-density polyurethane foam pad material

The present invention is about the production technique of polyurethane foam pad material, particularly the production technique of the pad material of the raising riding comfort of using about seats such as automobile, train, aircrafts.

Foam pad material is widely used in aspects such as the various vehicles such as automobile and sofa, furniture, sports pad material; to improve soft comfortableness; alleviate collision impact power; the protection person and apparatus are avoided damage; the seat cushion that surely belongs to all kinds of vehicles such as automobile of consumption maximum wherein, it is produced and generally adopts the main of widespread use is the polyurethane foam production technology of synthetics with polyvalent alcohol and isocyanic ester.Usually, it is comfortable that seat cushion will make the people be seated, can reduce tired, soft more in general good more, but too softly make the people that a kind of sensation of clinging be arranged in seat, the nest inconvenience therein change attitude of moving, then comfortableness really up to the mark reduces, so each factory all improves on its soft degree of adjusting, in the hope of the effect an of the best.At present, the domestic factory of filling up material that respectively relates to is the pad material that adopts the same rebound degree of same density, but this pad material can not make above-mentioned contradiction be well solved.Abroad begin to occur to be applied to the dual density pad material on the vehicles such as senior luxury car in late nineteen nineties, this dual density pad material is actually by the foam of two or more different densities to be formed, adopt the foam that be different from main body foamy density at different sites as headrest, the seat cushion left and right sides according to different needs, strengthen with the pad material of higher density in addition as the seat cushion both sides, make the people be difficult for move left and right above being sitting in, more stable, the more low-density foam of headrest.But existing production technique is other foam that is different from the main body foam density to be added in addition be attached to the main body foam and get on, more complicated, and globality is bad, and the location for paste has than obvious marks and harder bonding seam.

The object of the present invention is to provide that a kind of production technique is simple, the productive technology for double-density polyurethane foam pad material of good integrity.

Technical scheme of the present invention is: adopting with polyvalent alcohol and isocyanic ester is the polyurethane foam foam production technology of main synthetics, get the raw materials ready by the different densities requirement, mixing and stirring before facing cast, adopt the second pouring integral forming technique, cast earlier promptly is different from the foam of pad material body density less than the foam of pad material main part, after this part frostproof froth n. moulding, being heated to temperature is 110 ℃-140 ℃, place the predetermined position of pad material main body mould, the foam of cast pad material main part constitutes integral body again, leaves standstill foaming then.

All under 30 ℃ of-50 ℃ of temperature, be incubated 3-15 minute behind the casting complete.

Owing to adopt the technology of second pouring global formation, and heating last time the pad material of cast make production process simple to proper temperature, good integrity, the foam bonding of different densities firmly, the transition nature does not have hard bonding seam and vestige.

With an embodiment production technique of the present invention is described below.

Get the raw materials ready by the different densities requirement, several density are arranged, just prepare a few cover raw materials, as the seat cushion left and right sides is the high-density prescription, headrest is the low density prescription, main body is middle density prescription, after getting material ready, each raw material is mixing and stirring before facing cast all, adopts the second pouring integral forming technique, cast earlier is less than the foam of pad material main part, the foam that promptly is different from body density as the high-density foam of the seat cushion left and right sides and the low density foam of headrest, stirs the foam raw material of this two portions density through thorough mixing, be cast in the mould of predetermined suitable size and shape behind the foaming, it is 110 ℃-140 ℃ that the demoulding is heated to temperature, is placed on predetermined position in the pad material main body mould again, and the foam of pouring into a mould main part again constitutes whole, leave standstill foaming then, the finally demould trimming and finishing.

All insulations 3-15 minute under 30 ℃ of-50 ℃ of temperature behind the casting completes are to promote bonding between its foaming and different densities.

Other are by the manufacturing technique requirent operation of general polyurethane foam.

Claims

1. productive technology for double-density polyurethane foam pad material, employing is the polyurethane foam foam production technology of main synthetics with polyvalent alcohol and isocyanic ester, get the raw materials ready by the different densities requirement earlier, mixing and stirring before facing cast, it is characterized in that: adopt the second pouring integral forming technique, cast earlier promptly is different from the foam of pad material body density less than the foam of pad material main part, after this part frostproof froth n. moulding, being heated to temperature is 110 ℃-140 ℃, place the predetermined position of pad material main body mould, the foam of cast pad material main part constitutes integral body again, leaves standstill foaming then.

2. productive technology for double-density polyurethane foam pad material as claimed in claim 1 is characterized in that: the described foaming that leaves standstill is all to be incubated 3-15 minute behind the casting complete under 30 ℃ of-50 ℃ of temperature.