Raw materials for preparing corrugated dual-wall hard PVC pipe

The technology of double-wall corrugated pipes and rigid PVC is applied in the field of materials for preparing rigid PVC double-wall corrugated pipes, and can solve the problems of defective products, increased scrap rate, increased mold damage, and reduced product qualification rate, etc. Achieve the effects of good long-term heat resistance, improved pass rate, and increased Vicat softening temperature

Inactive Publication Date: 2002-05-01
SINOMACH GENERAL MACHINERY SCIENCE & TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the phenomenon of "decomposition", the rate of defective products and scrap products has greatly increased, and the qualified rate of products has seriously decreased, which can only reach 81%.
[0005] 3. Due to "decomposition", the cumulative interruption of production is about 260 hours per month, and the direct economic loss of raw materials, water, electricity, etc. can reach 190,000 yuan
And, due to the frequent disassembly of the mold and the cleaning of the paste, the possibility of mold damage is increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Present embodiment material adopts following formula (weight unit):

[0023] Polyvinyl chloride 100 Trisalt 6.4

[0024] Lead stearate 0.42 Barium stearate 1.4

[0025] Stearic acid 0.42 Microcrystalline paraffin 0.36

[0026] Polyethylene Wax 0.58 ACR(401) 1.9

[0027] Chlorinated polyethylene 5.8 Superfine calcium carbonate 9

[0028] AC316 0.28

[0029] The formulation of this example is suitable for resins with excellent thermal stability, plasticizing efficiency and fluidity, such as Qilu resin in my country. In this formulation, less stabilizers, lubricants, processing modifiers can be used to maintain normal production.

Embodiment 2

[0031] Present embodiment material adopts following formula (weight unit):

[0032] Polyvinyl chloride 100 Triple salt 6.5

[0033] Lead stearate 0.45 Barium stearate 1.6

[0034] Stearic acid 0.45 Microcrystalline paraffin 0.4

[0035] Polyethylene Wax 0.6 ACR(401) 2.0

[0036] Chlorinated Polyethylene 6.0 Superfine Calcium Carbonate 10

[0037] AC316 0.3

Embodiment 3

[0039] Present embodiment material adopts following formula:

[0040] Polyvinyl chloride 100 Triple salt 6.8

[0041] Lead stearate 0.47 Barium stearate 1.7

[0042] Stearic acid 0.47 Microcrystalline paraffin 0.41

[0043] Polyethylene Wax 0.62 ACR(401) 2.1

[0044] Chlorinated polyethylene 6.3 Superfine calcium carbonate 11

[0045] AC316 0.33

[0046] The above-mentioned embodiments 2 and 3 are aimed at resins with relatively poor stability, such as resins produced in Xuzhou and Suzhou in my country. Due to the lack of self-lubricating properties, it is necessary to add more stabilizers, lubricants, and processing modifiers. However, when adding more modifiers, the amount of filler can be appropriately increased to reduce costs.

[0047] For the material of the present invention, adopt following production technique:

[0048] 1. According to the formula applicable to different resins, various materials are formulated into mixtures.

[0049] 2. Put the mixture into ...

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PUM

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Abstract

A material used for making hard corrugated PVC pipe is prepared from PVC (100 pts.wt.), trisalt (6.4-6.8 pts.wt.), lead stearate (0.42-0.47 pts.wt.), barium stearate (1.4-1.7 pts.wt.), stearic acid (0.42-0.47 pts.wt.), microcrystal paraffin (0.36-0.41 pts.wt.), polyvinyl wax (0.58-0.62 pts.wt.), ACR (401) (1.9-2.1 pts.wt.), chlorinated polyethylene (5.8-6.3 pts.wt.), superfine calcium carbonate (9-11 pts.wt.) and AC 316 (0.28-0.33 pts.wt.). Its advantages are high lubricating performance, impact strength, ring rigidity and Vicat softening temp, good demoulding nature, and excellent low-temp plasticity.

Description

Technical field: [0001] The present invention relates to materials for the preparation of rigid polyvinyl chloride double-wall corrugated pipes. Background technique: [0002] Rigid polyvinyl chloride double-wall corrugated pipe is made of rigid polyvinyl chloride as the main material, adding a certain amount of heat stabilizer, lubricant, processing modifier and filler and other additives, and is formed by extrusion process. The product adopts the force principle of I-beam, and has the characteristics of low cost, light weight, impact resistance, pressure resistance, acid resistance, corrosion resistance, flame retardancy, insulation, and convenient installation. Mainly used in: municipal engineering, underground sewage and drainage pipes buried in residential quarters; high-voltage cables, post and telecommunications cable sheaths; expressway lines pre-buried pipelines; farmland, water conservancy irrigation water delivery, drainage; chemicals, mines for fluids or solids ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/02C08L27/06
Inventor 梁明庄田张恩友
Owner SINOMACH GENERAL MACHINERY SCIENCE & TECHNOLOGY CO LTD
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