Soft pet-g resin composition and soft film and zipper for zipper storage bag fabricated using the same
A technology of PET-G and resin composition, which is applied in the field of soft PET-G resin composition, can solve the problems of high production cost and complex structure, and achieve reduction of hardness, improvement of processability, enhancement of heat resistance and cold resistance sexual effect
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experiment example 1
[0044] PVC plastic zipper bag with zipper
[0045] According to the type of plasticizer, the zipper used for PVC plastic zipper bag is generally somewhat strange, but mainly use PVC with plasticizer content between 20 parts by weight and 30 parts by weight and Shore D hardness between 60-80.
[0046] Therefore, in Experimental Example 1, in order to manufacture a material suitable for the hardness of the zipper (120) for PVC plastic zipper bags, PET-G was used according to the implementation shown in Table 1 below.
[0047] [Table 1]
[0048]
[0049] *TPEE (Thermoplastic Polyester Elastomer) product number is KP3340, manufactured by Colon Co.
[0050] As shown in Table 1, since 5 parts by weight to 60 parts by weight of TPEE resin were gradually mixed with 100 parts by weight of the PET-G resin, heat resistance showed improvement when 10 parts by weight or more of TPEE resin was mixed. Effect, and as shown in Example 3, when mixing more than 20 parts by weight of TPEE re...
experiment example 2
[0053] Generally, the soft PVC film commonly used in plastic bags mainly uses PVC resin with a plasticizer content of 40 to 60 parts by weight added to 100 parts by weight of PVC film, but there are also soft PVC films containing 70 parts by weight of plasticizer. In the case of high-quality PVC resin (Shore D hardness 60±3 to A hardness 85±3).
[0054] Since the zipper for the zipper bag needs to maintain the hardness specified in Table 1 of Experimental Example 1, as shown in Table 1, by adding TPEE resin to PET-G, the hardness can be reduced to a certain extent. However, even when a low-hardness TPEE resin (Shore D hardness 40±3) is mixed, there is a limitation in preparing a low-hardness composition having a Shore D hardness of 65±3 or less.
[0055] Therefore, experiments were carried out according to Table 2 in order to prepare compositions having a Shore D hardness similar to that of soft PVC.
[0056] [Table 2]
[0057]
[0058] [table 3]
[0059]
[0060] *1)...
example 10
[0077] The A hardness of Example 10 is a little higher than 70phr PVC, but it has all the good physical properties required for soft films with low hardness, such as heat resistance, cold resistance, weather resistance, elasticity, surface strength (scratch resistance), processability Wait. Examples 12, 13 and 14 of Table 3 show excellent heat resistance, cold resistance and gloss, good weather resistance and cold resistance (weather resistance and cold resistance are the shortcomings of TPU) and good post-processing properties that PVC does not have.
[0078] There is no significant difference in the physical properties of Examples 13 and 14 in Table 3. But the hardness of Example 14 was increased due to the use of a large amount of TPEE resin, and in the case of too much expensive TPEE resin, the production cost increased.
[0079] As shown in Examples 8 and 14 of Table 3, relatively increased oil content exhibited surface leaching when exposed to the environment at tempera...
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