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Gasket material suitable for laser printing

A technology of laser printing and spacers, applied in the direction of film/sheet without carrier, pressure-sensitive film/sheet, film/sheet-shaped adhesive, etc., which can solve poor contrast, poor laser energy absorption, poor elasticity and strength and other problems, to achieve the effect of preventing the decline of tensile strength, high pressure-sensitive adhesive strength, and enhancing contrast

Active Publication Date: 2020-10-13
FOSHAN TONGJUN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The absorption of laser energy is poor, after laser development, the contrast is poor, the development effect is not good, and the recognition degree is not high;
[0004] 2. The elasticity and strength are not as good as PVC gaskets, especially the adhesion between the gasket and the iron cover is poor, resulting in problems such as side leakage

Method used

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  • Gasket material suitable for laser printing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The gasket material suitable for laser printing in this embodiment is prepared from raw materials with the following weight fractions:

[0022] 50 parts of styrene-butadiene-styrene block copolymer (SBS), 40 parts of polyethylene, 15 parts of rosin soap, 10 parts of stearic acid amide, 10 parts of laser powder, 10 parts of silicon-titanium compound, Among them, the silicon-titanium composite is composed of nano silicon dioxide, nano titanium dioxide and EPDM rubber in a mass ratio of 1:1:7, and before mixing with other components, the silicon dioxide, nano titanium dioxide It is preferentially mixed with rubber to form a sol.

[0023] Among them, the number average molecular weight of styrene-butadiene-styrene block copolymer (SBS) is 5.25.2×10 5 , the mass content of polystyrene and polybutadiene blocks is 15% and 45% respectively;

[0024] Described polyethylene is linear low-density polyethylene (LLDPE) and low-density polyethylene (LDPE) and mixture, and wherein L...

Embodiment 2

[0028] 60 parts of styrene-butadiene-styrene block copolymer (SBS), 25 parts of polyethylene, 10 parts of rosin modified phenolic resin, 8 parts of stearic acid amide, 8 parts of laser powder, silicon-titanium compound 15 parts, wherein the silicon-titanium composite is composed of nano-silica, nano-titanium dioxide and isoprene rubber in a mass ratio of 1:1:8, and before mixing with other components, the silicon dioxide , Nano-titanium dioxide is preferentially mixed with rubber to form a sol.

[0029] Among them, the number average molecular weight of styrene-butadiene-styrene block copolymer (SBS) is 3.8×10 5 , the mass content of polystyrene and polybutadiene blocks is 20% and 35% respectively;

[0030] Described polyethylene is linear low-density polyethylene (LLDPE) and low-density polyethylene (LDPE) and mixture, and wherein LLDPE content is 50%, and LDPE content is 50%, and the melting index MFI of LLDPE and LDPE is respectively 4.4 / 10min ( 230°C, 2.16kg) and 0.8 / 10m...

Embodiment 3

[0034] 80 parts of styrene-isoprene-styrene block copolymer (SIS), 15 parts of polyethylene, 5 parts of disproportionated rosin, 5 parts of stearic acid amide, 5 parts of laser powder, 10 parts of silicon-titanium compound , wherein the silicon-titanium composite is composed of nano silicon dioxide, nano titanium dioxide and isoprene rubber in a mass ratio of 1:1:9, and before mixing with other components, silicon dioxide, nano Titanium dioxide is preferentially mixed with rubber to form a sol.

[0035] Among them, the number average molecular weight of styrene-isoprene-styrene block copolymer (SIS) is 1.8×10 5 , the mass content of polystyrene and polyisoprene blocks is 15% and 45% respectively;

[0036] Described polyethylene is linear low-density polyethylene (LLDPE) and low-density polyethylene (LDPE) and mixture, and wherein LLDPE content is 40%, and LDPE content is 60%, and the melting index MFI of LLDPE and LDPE is respectively 5.2 / 10min ( 230°C, 2.16kg) and 0.8 / 10min...

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Abstract

The invention discloses a gasket material suitable for laser printing, which comprises the following raw materials in parts by weight: 50-80 parts of a thermoplastic elastomer, 15-40 parts of polyethylene, 5-15 parts of modified rosin resin, 5-10 parts of stearic acid amide, 5-10 parts of laser powder and 10-20 parts of a silicon-titanium compound, and the silicon-titanium compound is prepared bycompounding nano silicon dioxide, nano titanium dioxide and rubber according to a mass ratio of 1:1: (7-9). The gasket material disclosed by the invention is prepared by copolymerizing the thermoplastic elastomer, the polyethylene, the modified rosin resin and the stearic acid amide, so that the pressure-sensitive bonding strength between a gasket and a bottle cap is high, and no extra bonding agent is needed, the contrast ratio of laser marking can be enhanced synergistically by adding the laser powder and the silicon-titanium compound, and meanwhile, the rubber is used as a medium, so that atoughening effect can be achieved on a system.

Description

technical field [0001] The invention relates to the field of laser printing materials, in particular to a gasket material suitable for laser printing. Background technique [0002] At present, the gasket material that can be developed by laser for iron bottle caps is generally PVC gasket, which is composed of directly or indirectly adding lead-based laser powder to PVC to ensure the developability of the gasket material. However, since the gasket material is bonded to the bottle cap and is in direct contact with the bottled product, plasticizers need to be added in PVC processing. The plasticizer will migrate into the product if it is in contact with the product for a long time. Products that migrate plasticizers will pose a threat to the health of consumers, so more and more research has been transferred to non-PVC materials, but the current non-PVC gasket materials generally use blended modified materials, and there are the following shortcoming: [0003] 1. The absorpti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J153/02C09J123/06C09J123/08C09J11/04C09J11/06C09J11/08C09J7/38C09J7/10
CPCC08K2003/0812C08K2003/2241C08K2201/011C08L2205/02C08L2205/035C08L2207/04C08L2207/066C09J11/04C09J11/06C09J11/08C09J153/02C09J153/025C09J2409/00C09J2423/04C09J2453/00C09J7/10C09J7/387C08L23/06C08L23/0815C08L23/16C08L93/04C08K13/02C08K5/20C08K3/36C08K3/22C08K3/08C08L9/00C08L61/14C08K5/40
Inventor 车俊峥
Owner FOSHAN TONGJUN ENVIRONMENTAL PROTECTION TECH CO LTD
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