Hydromagnesite/huntite flame-retardant EVA/LLDPE (ethylene-vinyl acetate/linear low-density polyethylene) material

A technology of orthorhombite and hydromagnesite, which is applied in the field of EVA/LLDPE materials to achieve the effect of easy availability of raw materials, low price, and improved dispersion and surface condition

Inactive Publication Date: 2016-09-21
陈旭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of the flame retardancy of the existing EVA materials, provide a flame-retardant EVA / LLDPE material of hydromagnesite and orthodolite and a preparation method thereof, and the prepared EVA / LLDPE composite material has good flame retardancy performance with high tensile strength and elongation at break

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of modified hydromagnesite powder and orthorhombite powder

[0023] Add aluminate modifier F3 to 2500-mesh ultrafine hydromagnesite powder and orthorhombite powder for dry modification. The modification temperature is 115°C to 120°C. The mass ratio of hydromagnesite powder and orthologite powder The ratio is 3:1, and the amount of F3 is 1% of the weight of hydromagnesite powder and orthorhombite powder.

[0024] (2) Raw material formula

[0025] Ethylene-vinyl acetate copolymer EVA 85 parts

[0026] 15 parts of linear low density polyethylene LLDPE;

[0027] Maleic anhydride grafted polyethylene PE-g-MAH 30 parts;

[0028] 180 parts of modified hydromagnesite powder and orthorhombite powder;

[0029] Antioxidant 1010 0.5 parts;

[0030] Antioxidant DLTP 0.25 part;

[0031] 2 parts of PE wax;

[0032] 0.5 parts of erucic acid.

[0033] (3) Preparation method

[0034] Fully mix EVA, LLDPE, PE-g-MAH, modified hydromagnesite powder and orthorhombite...

Embodiment 2

[0036] (1) Preparation of modified hydromagnesite powder and orthorhombite powder

[0037] Add aluminate modifier F-1 to 1250 mesh ultra-fine hydromagnesite powder and orthorhombite powder for dry modification. The modification temperature is 115°C-120°C. The mass ratio is 2:1, and the dosage of LS-822 is 2.0% of the weight of modified hydromagnesite powder and orthorhombite powder.

[0038] (2) Raw material formula

[0039] Ethylene-vinyl acetate copolymer EVA 87.5 parts

[0040] 12.5 parts of linear low density polyethylene LLDPE;

[0041] Maleic anhydride grafted polyethylene PE-g-MAH 25 parts;

[0042] 180 parts of modified hydromagnesite powder and orthorhombite powder;

[0043] Antioxidant 168 0.5 part;

[0044] Antioxidant DLTP 0.5 part;

[0045] PE wax 3.0 parts.

[0046] (3) Preparation method

[0047] Fully mix EVA, LLDPE, PE-g-MAH, modified hydromagnesite powder and orthorhombite powder, then add antioxidant 168, antioxidant DLTP, PE wax, at plasticizing tem...

Embodiment 3

[0049] (1) Raw material formula

[0050] Ethylene-vinyl acetate copolymer EVA 88.8 parts

[0051] 11.2 parts of linear low density polyethylene LLDPE;

[0052] Maleic anhydride grafted polyethylene PE-g-MAH 20 parts;

[0053] 144 parts of hydromagnesite powder;

[0054] 36 parts of orthoclase powder;

[0055] Antioxidant 1010 1.0 parts;

[0056] 1.5 parts of PE wax;

[0057] Erucic acid 2.5 parts.

[0058] (2) Preparation method

[0059] Fully mix EVA, LLDPE, PE-g-MAH, hydromagnesite powder, orthorhombite powder, then add antioxidant 1010, PE wax, erucic acid, and obtain it at a plasticizing temperature of 150°C and a vulcanization temperature of 175°C.

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PUM

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Abstract

The invention discloses a hydromagnesite / huntite flame-retardant EVA / LLDPE (ethylene-vinyl acetate / linear low-density polyethylene) material which is prepared from the following components in parts by weight: 100 parts of base resins A (EVA and LLDPE), 20-30 parts of compatilizer B maleic anhydride grafted polyethylene (PE-g-MAH), 170-190 parts of inorganic flame retardants C (hydromagnesite powder and huntite powder), 0.5-1 part of antioxidant D and 2.5-4 parts of lubricant E. The preparation method comprises the following steps: uniformly mixing the raw materials, and treating at the plastifying temperature of 140-150 DEG C and the curing temperature of 160-180 DEG C. The EVA / LLDPE flame-retardant composite material disclosed by the invention has the advantages of favorable flame retardancy, excellent tensile strength and excellent elongation at break.

Description

technical field [0001] The invention belongs to the technical field of EVA materials, and in particular relates to a flame-retardant EVA / LLDPE material of hydromagnesite and orthodolite. Background technique [0002] Ethylene-vinyl acetate copolymer (EVA) is widely used in foaming materials, functional shed films, packaging films, hot melt adhesives, Wire and cable and toys and other fields. However, EVA, like most polymers, is easy to burn, has a large heat release, a large amount of smoke, and releases toxic gases, which greatly limits the application of EVA. [0003] Halogen-containing flame retardants have excellent flame-retardant properties and have been widely used. However, when a fire occurs, such halogen-containing flame-retardant materials will produce a large amount of smoke and toxic corrosive hydrogen halide gas, causing "secondary hazards" . [0004] In view of the above problems, the present invention adopts a halogen-free, low-smoke, low-toxic environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L51/06C08K13/06C08K9/04C08K3/22C08K3/26
CPCC08L23/0853C08L2201/02C08L2201/08C08L2205/035C08L23/0815C08L51/06C08K13/06C08K9/04C08K2003/222C08K2003/265C08K2003/267C08K13/02
Inventor 陈旭
Owner 陈旭
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