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Preparation method of PVC modified sheet

A sheet and modification technology, applied in the field of preparation of weather-resistant PVC sheet products, can solve the problems of breakage, easy rupture of PVC sheets, and easy aging, and achieve the effects of easy molding process, not easy to break, and not easy to age.

Inactive Publication Date: 2015-05-27
DONGGUAN PENGQI PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the chemical structural characteristics of PVC itself and small molecule processing aids such as plasticizers and lubricants in the products are easy to migrate to the surface, the current plastic-absorbing (plastic-absorbing board is PVC, also known as high molecular polymer) packaging materials are prone to appear. In the case of damage, especially when the temperature is low, the PVC sheet is easy to break and age

Method used

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  • Preparation method of PVC modified sheet
  • Preparation method of PVC modified sheet
  • Preparation method of PVC modified sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Prepare raw materials according to the following formula: 100 parts of PVC powder, 3.5 parts of dioctyl terephthalate (DOTP), 0.6 parts of n-butyl stearate, 0.3 parts of methyl hydrogen sulfate, 3.5 parts of polyethylene, acrylate 1.2 parts of resin (ACR resin), 2.2 parts of methyl tin mercaptide, 0.2 parts of pigment, 5.5 parts of methacrylic acid (MBS resin: methyl methacrylate-butadiene-styrene copolymer);

[0061] Drying of raw materials: drying at 115°C for 2.5 hours, then set aside;

[0062] (2) Add the dried raw materials into the mixer, mix and stir at high speed for 8 minutes, mixing order: powdery PVC plastic, dioctyl terephthalate (DOTP), methyl tin mercaptide, polyethylene , methyl hydrogen sulfate, acrylate resin (ACR resin), pigment, polyethylene, methacrylic acid (MBS resin); high-speed mixing to obtain a premix;

[0063] (3), the premix is ​​cooled to 48°C;

[0064] (4) Extrusion: Add the premixed material after cooling in step (3) into the extrude...

Embodiment 2

[0071] (1) Prepare raw materials according to the following formula: 107 parts of PVC powder, 4.3 parts of dioctyl terephthalate (DOTP), 0.8 part of n-butyl stearate, 0.5 part of nitrile rubber, 4.5 parts of polyethylene, acrylate resin (ACR resin) 1.9 parts, mercaptan methyl tin 2.8 parts, pigment 0.4 parts, methacrylic acid (MBS resin: methyl methacrylate-butadiene-styrene copolymer) 6.5 parts;

[0072] Drying of raw materials: drying at 122°C for 3.5 hours, set aside;

[0073] (2) Add the dried raw materials into the mixer, mix and stir at high speed for 6 minutes, mixing sequence: powdery PVC plastic (polyvinyl chloride resin), plasticizer, stabilizer, internal and external slip agent, Processing aids, pigments, tougheners, reinforcing agents; high-speed mixing to obtain premixes;

[0074] (3), the premix is ​​cooled to 50°C;

[0075] (4) Extrusion: Add the premixed material after cooling in step (3) into the extruder through the feeder, extrude through the extruder, and...

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Abstract

The invention discloses a preparation method of a PVC modified sheet and aims at increasing the toughness, the strength and the stretchability of the PVC sheet and greatly improving the weather fastness of the sheet. The PVC modified sheet is prepared from the following raw materials in parts by weight: 110 parts of PVC powder, 5 parts of a plasticizer, 1 part of an inner lubricant, 0.6 part of an outer lubricant, 5 part of a flexibilizer, 2 parts of processing aid, 3 parts of a stabilizer, 0.5 part of pigment and 7 parts of an enhancer. The produced PVC modified sheet has the advantages of better mechanical properties, light weight, easy molding, simple process, low cost and the like.

Description

technical field [0001] The invention relates to a polymer modified material, and more specifically, to a method for preparing a weather-resistant PVC sheet product. Background technique [0002] Polyvinyl chloride resin (PVC) is one of the earliest general-purpose resins that achieved industrialization and has a large output. It occupies an undoubted important position in material engineering. The global annual output of PVC is second only to polyethylene. Applied in all fields of production and life. PVC has excellent properties such as flame retardancy, corrosion resistance, insulation, and wear resistance. It is an important thermoplastic with low price and wide source of raw materials. [0003] Among them, PVC sheet is an important product in PVC products. It has good mechanical properties and transparency, and is widely used in the fields of medicine, food, and packaging. It not only meets the requirements of product mechanics and flame retardancy, but also increases ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L23/06C08L9/02C08L51/04C08L33/04C08K5/12C08K5/101C08K5/57B29C47/92B29L7/00B29C48/92
CPCC08L27/06B29C48/92B29C2948/92209B29L2007/002C08L2205/035C08L23/06C08L51/04C08L33/04C08K5/12C08K5/101C08K5/58C08L9/02
Inventor 张学军李明何富荣
Owner DONGGUAN PENGQI PLASTIC
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