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Elimination of anisotropy photosensitive resin flexographic plate and the flexographic printing plate made of it

A photosensitive resin, anisotropic technology, applied in the direction of printing, printing process, photoplate making process of pattern surface, etc., can solve problems such as unsatisfactory use requirements, internal cracks, poor drapability, etc.

Active Publication Date: 2021-06-18
上海甚龙新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of anisotropy will lead to poor physical properties of the photosensitive resin flexographic printing plate, such as poor drapability and poor printing effect
Anisotropy can also lead to other undesirable properties, such as more prone to internal cracking in stiffer directions, and more importantly, this non-uniformity can lead to extremely poor quality prints
The above-mentioned technical defects due to anisotropy cannot meet the requirements of modern photosensitive resin flexographic printing plates
Therefore, in order to avoid anisotropy in the current flexographic printing plate industry, in the actual production and processing process, generally only block copolymers with low content of polystyrene can be used as polymer base materials to produce flexible photosensitive resins. Printing plate, which undoubtedly greatly limits the technical development of high-content polystyrene block copolymers for the production of photosensitive resin flexographic printing plates

Method used

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  • Elimination of anisotropy photosensitive resin flexographic plate and the flexographic printing plate made of it
  • Elimination of anisotropy photosensitive resin flexographic plate and the flexographic printing plate made of it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Photosensitive resin components: thermoplastic elastomer SBS D4150KT (polystyrene weight content 33%) 715g, plasticizer Drakeol 34 177g, plasticizer Ricon 181 49.8g, 1,6-hexanediol diacrylate 19.7g, 19.9g of 1,6-hexanediol dimethacrylate, 10.0g of photoinitiator benzoin dimethyl ether, and 8.0g of antioxidant BHT were mixed on the extruder at 150°C for 3 minutes, discharged from the die, and passed through Calendering with a calender roll with a gap of 1.65 mm, and simultaneously covering the upper and lower sides of the photosensitive resin component with a release film with a thickness of 125 microns, and cooling to obtain a photosensitive resin layer for testing.

[0058] Curing of the photosensitive resin layer and evaluation of anisotropy: The obtained photosensitive resin layer covered with a release film was placed in an ultraviolet light intensity of 15mW / cm 2 Under certain conditions, the upper and lower sides were exposed for 15 minutes. After peeling off the...

Embodiment 2

[0060]Photosensitive resin components: thermoplastic elastomer SBS D4150KT (polystyrene weight content 33%) 715g, plasticizer Hydrocal500 167g, plasticizer Ricon 181 47g, 1,6-hexanediol diacrylate 43.5g, 1, 43.8g of 6-hexanediol dimethacrylate, 15g of photoinitiator benzoin dimethyl ether, and 8.0g of antioxidant BHT were mixed on the extruder at 150°C for 3 minutes, and the material was discharged from the die with a gap of 1.65 mm calender rolls, and at the same time, a layer of release film with a thickness of 125 microns was coated on the upper and lower sides of the photosensitive resin component. After cooling down, the photosensitive resin layer was obtained for testing.

[0061] Curing of the photosensitive resin layer and evaluation of anisotropy: the same as in Example 1.

Embodiment 3

[0063] Photosensitive resin components: thermoplastic elastomer SBS D4150KT (polystyrene weight content 33%) 715g, plasticizer Drakeol 34 177g, plasticizer Ricon 181 29.8g, 1,6-hexanediol diacrylate 29.7g, 29.9g of 1,6-hexanediol dimethacrylate, 10.0g of photoinitiator benzoin dimethyl ether, and 8.0g of antioxidant BHT were mixed on the extruder at 150°C for 3 minutes, and discharged from the die head. Calendering with a calender roll with a gap of 1.65 mm, and simultaneously covering the upper and lower sides of the photosensitive resin component with a release film with a thickness of 125 microns, and cooling to obtain a photosensitive resin layer for testing.

[0064] Curing of photosensitive resin layer and evaluation of anisotropy: same as embodiment 1

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Abstract

The invention relates to a photosensitive resin flexographic plate for eliminating anisotropy and a flexographic printing plate made thereof. The photosensitive resin flexographic plate includes a polyester support, an adhesive layer sequentially arranged on the polyester support from bottom to top, At least one photosensitive resin layer, release layer and protective film, the photosensitive resin layer is prepared from raw materials comprising the following components: at least one thermoplastic elastomer, at least one ethylenically unsaturated monomer and at least one photoinitiator agent, the thermoplastic elastomer is a triblock copolymer of A‑B‑A structure or‑(A‑B‑) n -Multi-block copolymer, wherein, n is an integer ≥ 2, A is a polymerized monoaryl alkane monomer, and B is a polymerized rubbery diene monomer or its corresponding hydrogenated product monomer. Compared with the prior art, the photosensitive resin flexographic plate of the present invention shows better isotropic physical isotropy, has excellent wear resistance, drape and printing durability, high strength and good toughness, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of flexographic printing, and relates to a photosensitive resin flexographic plate capable of eliminating anisotropy and a flexographic printing plate made thereof. Background technique [0002] It is well known to use a photosensitive resin flexographic plate to make a photosensitive resin flexographic printing plate, the printing surface of which is obtained by exposing the photosensitive resin layer with the surface covering the negative or negative film (film film), and then removing the unexposed, photopolymerized and uncured surface. formed by the region. At present, the prior art related to photosensitive resin flexographic plates can be found in the following US patents: US4323636, US4369246, US5135837, US5582954, US4323637, US5472824 and so on. Usually the photosensitive resin flexographic plate consists of the following parts: a polyester support, an optional adhesive layer for bonding the photose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/027G03F7/004B41N1/22
CPCB41N1/22G03F7/004G03F7/027
Inventor 杨俊
Owner 上海甚龙新材料技术有限公司