Three-layer composite release film for 3D printing process and preparation method of three-layer composite release film
A technology of layer composite and release film, which is applied in the field of three-layer composite release film for 3D printing process and its preparation, can solve the problems of low light transmittance and easy cracking, and achieve high light transmittance, production efficiency and finished product The effect of high pass rate and long service life
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Embodiment 1
[0032] Comparative Example 1: (The release film is all made of poly-4-methyl-1-pentene):
[0033] Comparative Example 2 (the release film is all made of long-chain branched modified poly-4-methyl-1-pentene):
[0034] The preparation method of the release film for the above-mentioned 3D printing process is as follows:
[0035] Comparative example 3 (too much addition of grafted monomer in B layer):
[0036] Comparative example 4 (only 1,4-butanediol diacrylate is used as graft monomer in layer B):
[0037] Comparative example 5 (only maleic anhydride is used for the graft monomer in layer B):
Embodiment 2
[0039] Table 1: Performance test results of release film
[0040] The release film in Comparative Example 1 is only made of poly-4-methyl-1-pentene, without adding long-chain branched modified poly-4-methyl-1-pentene as the middle layer, although it has better The releasability, but its elongation at break is significantly reduced compared with Example 1, and the service life is reduced. The release film in Comparative Example 2 is all made of long-chain branched modified poly-4-methyl-1-pentene. Although it has better mechanical properties, the haze of the film increases and the release property decreases. Also do not meet the requirements for use in the 3D printing field.
[0041] In Comparative Example 3, during the preparation of long-chain branched modified poly-4-methyl-1-pentene, the amount of grafted monomer added was too much, which exceeded the scope of the present invention, and the permeability of the prepared release film Compared with Example 1, the light rate ...
Embodiment 3
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