Production method of hard polychloroethylene section bar soft-hard coextrusion rubber strip

A rigid polyvinyl chloride, soft and hard co-extrusion technology, applied in the field of rigid polyvinyl chloride profile sealing strips, can solve the problem of large fluctuations in the hardness of adhesive properties, tensile properties and low-temperature toughness materials, and the content is not disclosed , Large difference in the size change rate of the sealant strip, etc.

Inactive Publication Date: 2009-07-15
南京皇家聚锋建筑材料有限公司
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Problems solved by technology

[0004] Although everyone knows the production method of sealant strips co-extruded with rigid PVC profiles, including batching, mixing, granulation, drying, and extrusion steps, the specific substances in each component of the batching, and the content of each component None are public
Moreover, the current sealant strips co-extruded with rigid PVC profiles have great fluctuations in bonding performance, tensile properties, low-temperature toughness, and material hardness with changes in temperature, and the dimensional change rate of the sealant strips after heating is different from that of PVC. The difference between the profiles is large, and there will be separation between the two caused by different shrinkage rates, resulting in poor sealing performance

Method used

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  • Production method of hard polychloroethylene section bar soft-hard coextrusion rubber strip

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Experimental program
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Embodiment Construction

[0012] Table 1

[0013] Example pvc calcium carbonate Diisononyl phthalate Titanium dioxide Calcium zinc stabilizer 1 100 10 60 10 1 2 100 13 70 13 3 3 100 15 80 15 4.5 4 100 10 90 15 4 5 100 13 60 13 2 6 100 15 85 15 3

[0014] Referring to Table 1, various materials were prepared according to different weights to obtain Examples 1-6 with different proportions. This example was processed according to the following steps respectively.

[0015] 1. In the hot mixing pot of the hot mixer, rotate PVC, diisononyl phthalate, and calcium zinc stabilizer at 2000-2200 rpm to 110°C at high speed, then add calcium carbonate and titanium dioxide, and mix The material temperature is 125°C, and the material is discharged until it is cold mixed.

[0016] 2. On the cold mixer, the cooling water is lower than 14°C, and the premix is ​​obtained by stirring at a low speed of 400-450 rpm.

[0017] 3. The premix is ​​g...

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Abstract

The invention provides a production method for a sealing joint strip used for co-extrusion with hard PVC profile materials. The produced sealing joint strip has good adhesive property, tensile property and low-temperature flexibility. The materials less fluctuates with the temperature; the variance ratio of the size of the sealing joint strip after being heated is close to that of the PVC profile materials; therefore, the separation phenomena of the sealing joint strip and the PVC profile materials caused by different shrinkage factors does not appear, thus ensuring the long-term sealing function of plastic doors and windows. The production method comprises the steps of material proportioning, mixing, pelleting, drying and extrusion. The components of ingredients are as follows according to the parts by weight: 100 parts of PVC, 10-15 parts of calcium carbonate, 60-90 parts of diisononyl phthalate, 10-15 parts of titanium pigment and 1-4.5 parts of calcium zinc stabilizing agent.

Description

technical field [0001] The invention relates to a production method of a rigid polyvinyl chloride (PVC-U) profile sealing strip, in particular to a production method suitable for soft and hard co-extruded sealing strips. Background technique [0002] At present, unplasticized polyvinyl chloride (PVC-U) profiles for doors and windows are rigid PVC products, which are produced by extrusion molding and usually do not come with rubber strips. Sealant strips for doors and windows are soft products such as soft modified PVC or modified rubber on the market, which are also produced by extrusion. In the production process of doors and windows, the two are usually mechanically embedded to solve the sealing between the door and window frame leaves and between the leaves and the glass. The assembly of the sealing strip and the profiles in this method is a secondary processing method, and may cause defects such as uneven stretching, easy falling off, shrinkage and deformation of the se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/00C08L27/06C08K3/26C08K5/12C08K3/22B29B7/00B29C47/82
Inventor 李国良郑生力宋庆弟陈学智曾省成吴草木
Owner 南京皇家聚锋建筑材料有限公司
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