CN102391540A - Foaming method for preparing polyurethane foam - Google Patents

Foaming method for preparing polyurethane foam Download PDF

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Publication number
CN102391540A
CN102391540A CN2011102713669A CN201110271366A CN102391540A CN 102391540 A CN102391540 A CN 102391540A CN 2011102713669 A CN2011102713669 A CN 2011102713669A CN 201110271366 A CN201110271366 A CN 201110271366A CN 102391540 A CN102391540 A CN 102391540A
Authority
CN
China
Prior art keywords
foaming
foam
packing paper
slurries
polyurethane foam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011102713669A
Other languages
Chinese (zh)
Inventor
李田生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AUTOMOBILE DECORATION MATERIAL BRANCH LIYANG SHANHU INDUSTRIAL Co Ltd
Original Assignee
AUTOMOBILE DECORATION MATERIAL BRANCH LIYANG SHANHU INDUSTRIAL Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AUTOMOBILE DECORATION MATERIAL BRANCH LIYANG SHANHU INDUSTRIAL Co Ltd filed Critical AUTOMOBILE DECORATION MATERIAL BRANCH LIYANG SHANHU INDUSTRIAL Co Ltd
Priority to CN2011102713669A priority Critical patent/CN102391540A/en
Publication of CN102391540A publication Critical patent/CN102391540A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a foaming method for preparing polyurethane foam. The foaming method comprises the following steps of: (1) adding premixed foaming slurry into a foaming box; (2) putting packing paper along the inner wall of the foaming box; and (3) after the packing paper is immersed by the foaming slurry, lifting the packing paper upwards along with the foaming of the foaming slurry till the foaming is finished. In the foaming process, the packing paper and the foaming slurry are lifted upwards and synchronously, so that the resistance of the box wall when the foaming slurry rises can be reduced and even eliminated, further the height of foam on the edge is level to the height of foam in the center, the foaming body with a smooth surface is obtained and the yield of a foaming product is improved.

Description

A kind of foaming method of producing polyurethane foam
Technical field
The present invention relates to produce the foaming method of polyurethane foam.
Background technology
No matter be through the manual foaming or the foaming slurries of mechanical foaming gained; It is positioned in the foam box behind the free foaming foam article top of gained, and all to be circle vaulted, this mainly be since the resistance between the foaming surface tension of slurries own and foam material edge and tank wall big due to; The goods of gained need the vaulted cutting of the circle at foam article top, because the existence of top dome has increased waste material when making foams cutting flaw-piece.
Summary of the invention
The present invention has overcome deficiency of the prior art, and a kind of foaming method of producing polyurethane foam is provided, and the foam article that adopts this foaming method to produce can reduce waste material, improves the volume ratio of foam article.
The foaming method of producing polyurethane foam provided by the invention comprises the steps:
The foaming slurries that (1) will stir in advance add in the foam box;
(2) place packing paper along the inwall of foam box;
(3) wait to foam behind the slurries submergence packing paper, upwards lift packing paper, accomplish until foaming with the foaming of foaming slurries.
In the foaming process; Packing paper and foaming slurries are upwards lifted synchronously; The speed that lifts is not less than the expansion rate of foaming slurries, and the tank wall resistance in the time of can reducing even eliminate the rising of foaming slurries makes that the foam height on the limit is equal with the center; Obtain the foams of surfacing, improve the volume ratio of foam article.
Described packing paper is a kraft paper, because kraft paper has the band pasta, smoother is easier to break away from foam article after foaming is accomplished.
Embodiment
Further specify the present invention below in conjunction with embodiment.
At present, when producing polyurethane foam product, after the slurries that will foam mix; Directly pour into and let alone free foaming in the foam box; In the foaming process, because the resistance between the foaming surface tension of slurries own and foam material edge and tank wall is bigger, it is vaulted that the top of the goods of gained all is circle; The actual foam article used needs the vaulted cutting of the circle at top, because the existence of top dome has increased waste material when making foams cutting flaw-piece.
The foaming method of producing polyurethane foam provided by the invention is that the foaming slurries that at first will stir in advance add in the foam box; Place packing paper along the inwall of foam box then, said packing paper is preferably kraft paper; Wait to foam behind the slurries submergence packing paper, upwards lift packing paper with the foaming of foaming slurries, the speed that lifts is not less than, slightly faster than or the expansion rate of the slurries that equal to foam, accomplish until foaming.The inwall packing paper upwards lifts with the foaming slurries synchronously, and the tank wall resistance in the time of can reducing even eliminate the rising of foaming slurries makes that the foam height on the limit is equal with the center, obtains the foams of surfacing.

Claims (3)

1. a foaming method of producing polyurethane foam is characterized in that comprising the steps:
The foaming slurries that (1) will stir in advance add in the foam box;
(2) place packing paper along the inwall of foam box;
(3) wait to foam behind the slurries submergence packing paper, upwards lift packing paper, accomplish until foaming with the foaming of foaming slurries.
2. the foaming method of producing polyurethane foam according to claim 1 is characterized in that speed that described packing paper lifts is not less than the expansion rate of foaming slurries.
3. the foaming method of producing polyurethane foam according to claim 1 and 2 is characterized in that described packing paper is a kraft paper.
CN2011102713669A 2011-09-14 2011-09-14 Foaming method for preparing polyurethane foam Pending CN102391540A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011102713669A CN102391540A (en) 2011-09-14 2011-09-14 Foaming method for preparing polyurethane foam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011102713669A CN102391540A (en) 2011-09-14 2011-09-14 Foaming method for preparing polyurethane foam

Publications (1)

Publication Number Publication Date
CN102391540A true CN102391540A (en) 2012-03-28

Family

ID=45858935

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011102713669A Pending CN102391540A (en) 2011-09-14 2011-09-14 Foaming method for preparing polyurethane foam

Country Status (1)

Country Link
CN (1) CN102391540A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107553804A (en) * 2017-09-08 2018-01-09 张家港长泰汽车饰件材料有限公司 The foaming method of polyurethane foam

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1803439A (en) * 2006-01-19 2006-07-19 河北科技大学 Raise-and-draw device for eliminating hump for horizontal continuous foaming machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1803439A (en) * 2006-01-19 2006-07-19 河北科技大学 Raise-and-draw device for eliminating hump for horizontal continuous foaming machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107553804A (en) * 2017-09-08 2018-01-09 张家港长泰汽车饰件材料有限公司 The foaming method of polyurethane foam

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Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20120328

Assignee: LIYANG CITY SHANHU INDUSTRY CO., LTD.

Assignor: Automobile Decoration Material Branch, Liyang Shanhu Industrial Co., Ltd.

Contract record no.: 2013320000020

Denomination of invention: Foaming method for preparing polyurethane foam

License type: Exclusive License

Record date: 20130122

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20120328